• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The method is used to operate a ring spinning system, which includes a ring spinning machine with a plurality of spinning stations and a winder with a plurality of winding units. During the rewinding of a cop, a value of a parameter characteristic of the yarn is determined on the winding unit and assigned to the spinning station on which the cop has been wound up. A plurality of different subsets of all spinning stations is formed. For each of the subsets, an output parameter value is determined from the values of the parameter characteristic of the yarn associated with the spinning units of the respective subset. For the majority of subsets, the output parameter values are plotted together in a graphical representation (200), depending on the subsets for which they were determined. The graphical representation (200) is output in visually detectable form to an operator. It allows an operator to quickly, easily and intuitively identify local differences in quality as well as intervene on potentially malfunctioning spinning stations.
    公开号:CH714693A2
    申请号:CH00685/19
    申请日:2019-05-27
    公开日:2019-08-30
    发明作者:Archontopoulos Vasileios；Narayanan Sivakumar
    申请人:Uster Technologies Ag；
    IPC主号:
    专利说明:

    TECHNICAL FIELD The present invention is in the field of ring spinning, and particularly in quality control in ring spinning. It relates to a ring spinning system and a method for its operation, according to the independent patent claims.
    BACKGROUND ART A ring spinning system usually includes a ring spinning machine and a dishwasher.
    The ring spinning machine has a large number of spinning positions. At each spinning station, roving is drawn off from a roving spool, stretched, twisted (spun) and wound up as a yarn on a bobbin (spool of thread). Systems for monitoring the operation of the spinning stations, e.g. to detect thread breaks or "Schleicherspindeln" (i.e. spindles that work at their own speed below the set machine speed) are known. Such spinning monitoring systems typically measure the rotation speed of the respective ring traveler (e.g. US4 222 657 A) or of the yarn (e.g. WO-2014/022 189 A1). The USTER® SENTINEL ring spinning optimization system, which is described in the brochure “USTER® SENTINEL - The ring spinning optimization system”, Uster Technologies AG, 2016, belongs to the first category. The USTER® SENTINEL ring spinning optimization system creates a bobbin build report in which, among other things, the average number of thread breaks and the average rotation speed are depicted graphically depending on the position along a longitudinal axis of a bobbin. The cop assembly report is output to an operator on a screen.
    After their manufacture, the cops are transported from the ring spinning machine to a dishwasher. Head tracking systems are known which make it possible to assign a head located in the dishwasher to the spinning station on which it was manufactured. The assignment can be made, for example, by means of an identification carrier on the head sleeve (e.g. US-4 660 370 A) or on a spool plate (caddy) which transports the head (e.g. DE-4 209 203 A1).
    [0005] The dishwasher has a large number of winding stations. At each winding station, several cops are wound one after the other onto a cheese. The purpose of rewinding is to produce large spools of thread that can be transported and used efficiently. During rewinding, properties of the yarn are monitored and compared with specified quality criteria. If the quality criteria are not met, the defective spot can be removed from the yarn. So-called yarn cleaning systems are known for this purpose, e.g. from WO-2012/051 730 A1.
    In US 5 107 667 A an administrative method for spinning machines is proposed. The spinning plant is equipped with a cop tracking system. Yarn defects are determined when the yarn is rewound on the dishwasher. Defective spinning positions of the ring spinning machine are determined by means of the cop tracking system.
    DE-4 306 095 A1 discloses a method and a device for controlling a networked spinning plant. The spinning plant comprises a ring spinning machine, an automatic control device assigned to the ring spinning machine and a dishwasher with a yarn cleaner linked to the ring spinning machine. It is equipped with a head tracking system. Information is exchanged to optimize the spinning plant. The operating machine not only carries out operating operations, but also collects information relating to the states of the spinning positions and the thread breaks in the individual cops. The dishwasher or its yarn cleaners can use the bobble tracking system to determine that a certain spindle of the ring spinning machine always produces bad yarn.
    [0008] EP-2 455 317 A1 describes a ring spinning system with a ring spinning machine, a dishwasher and a cop tracking system. Each winding unit on the dishwasher is equipped with a thread cleaner that detects fluff in the thread. The measurement results of the yarn cleaner are assigned to the spinning station on which the respective bobbin was wound up. It is proposed to graphically represent the course of the number of lint in the yarn as a function of the position on the yarn for each cop. The course for the current cop is compared with courses for cops that have been rewound previously. If the comparison reveals an inadmissible change in the course according to a predetermined criterion, this is an indication that the relevant spinning station requires maintenance.
    SUMMARY OF THE INVENTION It is an object of the present invention to provide a ring spinning system and a method for its operation which achieve a substantially homogeneous quality of the yarn on all spinning positions of the ring spinning machine. The productivity of the ring spinning system and the service life of replaceable machine parts are to be increased.
    These and other objects are achieved by the method and the ring spinning system as defined in the independent claims. Advantageous embodiments are specified in the dependent claims.
    The invention is based on the idea of graphically representing a "quality card" of the ring spinning machine and thus giving an operator indications of possibly poorly functioning spinning positions. Based on the graphic representation, the operator can intervene on the ring spinning machine. The "quality card" includes
    CH 714 693 A2 is a reduced, simplified and explanatory illustration of the ring spinning machine or parts thereof. It also includes a graphical representation of output parameter values which were determined from values of a parameter characteristic of the yarn and which are shown at those spinning positions at which the yarn in question was spun and wound up. With such a «quality card», an operator can quickly, easily and intuitively identify local quality differences. Based on this, she can intervene in spinning positions that may be malfunctioning.
    The inventive method is used to operate a ring spinning system, which includes a ring spinning machine with a plurality of spinning stations and a dishwasher with a plurality of winding stations. Yarn is spun at each of the spinning positions and wound into a bobbin. The cops are transported from the spinning stations to one of the winding stations. At each winding point, the yarn from the respective cop is rewound onto a yarn spool. During the rewinding of a respective bobbin, at least one value of a parameter characteristic of the yarn is determined and assigned to the spinning station on which the bobbin was wound. A plurality of different subsets of all spinning stations are formed. For each of the subsets, an output parameter value is determined from the values of the parameter characteristic of the yarn, which are assigned to the spinning positions of the respective subsection. For the majority of subsets, the output parameter values are shown graphically together in dependence on the subsets for which they were determined. The graphic representation is output to an operator in a form that is visually ascertainable.
    In one embodiment, all subsets from the plurality of subsets are disjoint, and each of the subsets consists of the same number of spinning stations. This number is preferably between 1 and 100.
    In one embodiment, each output parameter value is calculated by means of statistical processing of values of the parameter characteristic of the yarn, which are assigned to the spinning station or the spinning stations of the respective subset.
    [0015] In one embodiment, at least one of the subsets consists of several spinning stations. On the basis of a corresponding input by the operator, a plurality of different subsets of all spinning stations of this at least one subsection are formed. For each of the subsets, an output parameter value is determined from the values of the parameter characteristic of the yarn, which are assigned to the spinning positions of the respective subsets. For the majority of subsets, the output parameter values are shown graphically together in dependence on the subsets for which they were determined. The graphic representation is output to an operator in a form that is visually ascertainable. All subsets from the plurality of subsets can be disjoint, and each of the subsets can consist of the same number of spinning stations. This number is preferably 1.
    In one embodiment, the subsets or the subsets on the ring spinning machine can be locally delimited from one another. The graphic representation essentially contains a reduced, simplified and explanatory illustration of the ring spinning machine or parts thereof as well as the output parameter values in an arrangement which corresponds to the arrangement of the partial quantities or partial quantities on the ring spinning machine.
    Preferably, the union of all subsets consists of the plurality of subsets from all spinning positions of the ring spinning machine.
    In one embodiment, at least one admissibility criterion is specified for the output parameter value, and those output parameter values that meet the admissibility criterion are represented graphically differently than those output parameter values that do not meet the admissibility criterion.
    The at least one value of the parameter characteristic of the yarn can be assigned to the spinning station on which the cop was wound by assigning an identification carrier to the cop, and an identification of the spinning station to the identification carrier, the identification carrier at the respective winding unit is read out and the identification of the spinning station is determined on the basis of the identification carrier. In addition, the at least one value of the parameter characteristic of the yarn can be assigned to a time when the bobbin is wound up by assigning an identification of the time of winding up to the identification carrier, reading out the identification carrier at the respective winding position and identifying the time of winding up using the Identification carrier is determined.
    In one embodiment, an intervention is carried out on the ring spinning machine based on the graphic representation. The intervention can include an action from the following set: changing a specification for a spindle speed, replacing a ring traveler, replacing an expansion strap, changing a pressure cylinder, changing the air temperature, changing the air humidity.
    A recommendation for the intervention on the ring spinning machine can be generated automatically and can be output to the operator in addition to the graphical representation.
    In one embodiment, the characteristic parameter for the yarn is selected from the following quantity: variation coefficient of the yarn mass, variation coefficient of the yarn diameter, hairiness, number of thick spots per length unit, number of thin spots per length unit, number of periodic yarn errors per length unit, number of yarn number fluctuations per length unit, Number of foreign substances per unit length.
    CH 714 693 A2 The ring spinning system according to the invention includes a ring spinning machine with a large number of spinning stations for spinning yarn and for winding the yarn onto a cop. The ring spinning system also includes a dishwasher with a large number of winding stations for rewinding the yarn from a respective bobbin onto a yarn spool. The ring spinning system also includes a yarn monitoring system for monitoring properties of the yarn, with a yarn sensor at each of the winding units for measuring a yarn measurement size and a yarn monitoring control unit connected to the yarn sensor, which is set up to receive values of the yarn measurement size from the yarn sensor of a winding unit, therefrom during the Rewinding each cop to determine at least one value of a parameter characteristic of the yarn and to assign the at least one determined value to the spinning station on which the cop was wound. Furthermore, the ring spinning system contains a transport system for transporting a cop from the spinning station to one of the winding stations. The ring spinning system also includes a central control and evaluation device connected to the yarn monitoring control unit, which is set up to receive the values of the parameter characteristic of the yarn from the yarn monitoring control unit, to form a plurality of different subsets of all spinning stations, and an output parameter value for each of the subsets to determine from the values of the characteristic parameter for the yarn, which are assigned to the spinning stations of the respective partial quantity, for the majority of partial quantities the output parameter values as a function of the partial quantities for which they were determined, to be graphically represented together with the graphical representation Output to a user in a form that is visually detectable and thereby provide a basis for an intervention on the ring spinning machine.
    [0024] In one embodiment, the central control and evaluation device is identical to the yarn monitoring control unit.
    [0025] In one embodiment, the central control and evaluation device contains an input unit. The central control and evaluation device is set up to divide at least one of the subsets, which consists of several spinning stations, into a plurality of different subsets of all spinning stations of the at least one subset, for each of the operator, based on a corresponding input by the operator To determine sub-quantities an output parameter value from the values of the characteristic parameter for the yarn, which are assigned to the spinning positions of the respective sub-quantity, for the majority of sub-quantities to graphically display the output parameter values as a function of the sub-quantities for which they were determined and to output the graphical representation to an operator in a form that is visually detectable.
    [0026] The central control and evaluation device can be set up to automatically generate a recommendation for the intervention on the ring spinning machine and to output it to the operator in addition to the graphic representation.
    In one embodiment, the ring spinning system contains several yarn monitoring systems, the yarn monitoring control units of which are connected to a yarn expert system. The yarn expert system is set up to receive, process and output data from the yarn monitoring control units in a suitable form and to control the yarn monitoring control units. The yarn expert system is connected to the central control and evaluation device.
    An advantage of the invention is the achievement of an essentially homogeneous quality of the yarn on all spinning positions of the ring spinning machine. The invention creates a quality overview - a "quality card" so to speak - via the ring spinning machine, which enables the operator to quickly, easily and intuitively identify local quality differences. Based on this, the operator can intervene in possibly poorly functioning spinning positions. Thanks to the invention, systematic quality deviations in the yarn are recognized more quickly and their causes can be remedied by the operator. The local resolution of the yarn data for the individual spinning positions enables a differentiated intervention on the ring spinning machine. Settings on the ring spinning machine can be made optimally, which increases the yarn quality and productivity. The invention makes it possible to optimize the service life of parts of the ring spinning machine or consumables thereon in that they do not need to be replaced too early as a precaution, but also not replaced too late, which would lead to a reduction in productivity and / or a reduction in quality. The effects of an intervention on the ring spinning machine can be observed and recorded over a long period of time. Several ring spinning machines working at the same time can be compared with one another, from which a distinction can be made in particular between machine-related influences and other influences such as raw material or ambient conditions.
    LIST OF THE DRAWINGS The invention is explained in detail below with reference to the drawings.
    Fig. 1 shows schematically an inventive ring spinning system.
    2-4 show examples of graphical representations of how they can be output in the method according to the invention.
    CH 714 693 A2
    EMBODIMENT OF THE INVENTION FIG. 1 schematically shows a ring spinning system 1 according to the invention. The ring spinning system 1 contains a ring spinning machine 2 and a dishwasher 3.
    The ring spinning machine 2 has a large number of spinning stations 21. At each spinning station 21, yarn is spun from roving by means of the known ring spinning process and wound into a so-called cop 91. The ring spinning machine 2 can be equipped with a spinning monitoring system 4 for monitoring the operation of the spinning stations 21, e.g. be equipped to detect thread breaks or "Schleicherspindeln". The spinning monitoring system 4 contains a spinning sensor 41 at each of the spinning stations 21. The spinning sensor 41 measures a spinning measurement. Each spinning sensor 41 is connected to a spinning monitoring control unit 43 via a wired or wireless first data line 42. The spinning sensor 41 sends values of the spinning measurement variable to the spinning monitoring control unit 43 via the first data line 42. The spinning monitoring control unit 43 receives the values. From this, during the winding up of the cop 91, it determines at least one value of a parameter characteristic of the operation of the spinning station 21 and stores it. Examples of the parameter characteristic of the operation of the spinning station 21 are a number of thread breaks per unit of time, a ring rotor speed, an air temperature and an air humidity.
    The full, simultaneously produced cops 91 are simultaneously deposited («doffed») by the ring spinning machine 2 and then transported to the dishwasher 3, which is indicated in FIG. 1 by dashed arrows 22.
    [0033] The dishwasher 3 has a large number of winding points 31. At each winding unit 31, yarn 92 is successively transferred from a plurality of cops 91 onto a yarn bobbin 93, e.g. a cheese, rewound. The dishwasher 3 is equipped with a yarn monitoring system 5 for monitoring properties of the yarn 92. The yarn monitoring system 5 includes a yarn sensor 51 at each of the winding stations. The yarn sensor 51 measures a yarn measurement parameter. Each yarn sensor 51 is connected to a yarn monitoring control unit 53 via a wired or wireless second data line 52. The yarn sensor 51 sends values of the yarn measurement variable to the yarn monitoring control unit 53 via the second data line 52. The yarn monitoring control unit 53 receives the values. From this, during the rewinding of the cop 91, it determines at least one value of a parameter characteristic of the yarn and stores it. Examples of the characteristic parameter for the yarn 92 are a variation coefficient of the yarn mass, a variation coefficient of the yarn diameter, a hairiness, a number of thick spots per length unit, a number of thin spots per length unit, a number of periodic yarn errors per length unit, a number of variations in the yarn number per length unit and number of foreign substances per unit length. The yarn monitoring system 5 can e.g. be designed as a yarn cleaning system, wherein each yarn sensor 51 can be assigned a yarn cutting unit that removes impermissible yarn defects from the yarn 92.
    Empty head sleeves are removed from the dishwasher 3 and fed back to the ring spinning machine 2, which is indicated in FIG. 1 by dashed arrows 32.
    The ring spinning system 1 according to the invention also includes a central control and evaluation device 6. The central control and evaluation device 6 can be connected to the spinning monitoring control unit 43 via a wired or wireless third data line 44 and from there the values for the operation of the spinning station 21 characteristic parameter received. The central control and evaluation device 6 is also connected via a wired or wireless fourth data line 54 to the yarn monitoring control unit 53 and receives from it the values of the parameter characteristic of the yarn 92. The central control and evaluation device 6 receives the values of the parameter characteristic of the yarn 92 from the yarn monitoring control unit 53. It forms a plurality of different subsets of all spinning stations 21. It determines an output parameter value for each of the subsets from the values of the characteristic of the yarn 92 Parameters which are assigned to the spinning stations 21 of the respective subset. For the majority of subsets, it graphically displays the output parameter values depending on the subsets for which they were determined, in a graphical representation. Then, it outputs the graphical representation to an operator in a form that can be visualized. As a result, it provides a basis for intervention on the ring spinning machine 2. The graphic representation is explained in more detail below with reference to FIGS. 2-4.
    The central control and evaluation device 6 can be designed as an independent device, e.g. as a computer that is in the spinning mill or outside the spinning mill. Alternatively, the central control and evaluation device 6 can be integrated in another device, e.g. in a yarn testing device in the textile laboratory of the spinning mill, in the spinning monitoring control unit 43, in the yarn monitoring control unit 53 etc. In the latter two cases, there can be a direct data connection between the spinning monitoring control unit 43 and the yarn monitoring control unit 53, via which the two control units 43, 53 transmit or exchange data , The central control and evaluation device 6 is connected to an output unit, via which the graphic representation is output to the operator. In the embodiment of Fig. 1, a mobile device 61, e.g. a mobile phone, which communicates wirelessly with the central control and evaluation device 6, is drawn in as an output unit. Alternatively or additionally, other output units known per se, e.g. a computer screen can be used. The central control and evaluation device 6 is preferably also connected to an input unit via which the operator can make inputs. The mobile device 61 can serve as an output and input unit. Alternatively or additionally, other input units known per se, such as a computer keyboard can be used.
    CH 714 693 A2 Along the third data line 44 and / or the fourth data line 54 there can be further devices which receive the processed data, process it and transmit it if necessary. In one embodiment, the ring spinning system 1 contains a plurality of spinning monitoring systems 4 on one or more ring spinning machines 2, the spinning monitoring control units 43 of which are connected to a spider expert system 45. The spinning expert system 45 is set up to receive, process and output data from the spinning monitoring control units 43 in a suitable form, and to control the spinning monitoring control units 43. For its part, it is connected to the central control and evaluation device 6.
    In one embodiment, the ring spinning system 1 contains a plurality of yarn monitoring systems 5 on one or more dishwashers 3, the yarn monitoring control units 53 of which are connected to a yarn expert system 55. The yarn expert system 55 is set up to receive, process and output data from the yarn monitoring control units 53 in a suitable form, and to control the yarn monitoring control units 53. For its part, it is connected to the central control and evaluation device 6.
    The ring spinning system 1 is preferably equipped with a (not shown) cop tracking system, which makes it possible to assign a cop 91 located in the dishwasher 3 to the spinning station 21 on which it was produced. Such cop tracking systems are known per se and are not discussed further here. The bobbin tracking system can assign an identification of the spinning station 21, on which a specific bobbin 91 was produced, to the bobbin 91 and provide the assignment of the yarn monitoring control unit 53 and / or the central control and evaluation device 6. The bobbin tracking system can also determine an identification of a point in time when the bobbin 91 was unwound and make it available to the yarn monitoring control unit 53 and / or the central control and evaluation device 6. Such identification of a time when the cop 91 is unwrapped may e.g. be a so-called doff number, i.e. a natural number that uniquely identifies a "doff" of copes 91 produced at the same time by the ring spinning machine 2 and which is increased by one for each subsequent doff.
    FIG. 2 shows an example of a graphic representation 200 as it can be represented on the output unit 61. In the middle, a ring spinning machine 2 is shown schematically reduced and simplified. The spinning positions of the ring spinning machine 2 are divided into groups of the same type, so-called sections. Each section is a subset of all the spinning stations 21 of the ring spinning machine 2. In the example in FIG. 2, the ring spinning machine 2 has a total of 54 sections - 27 on the left and 27 on the right. In the graphical representation 200, every second section is labeled with a unique name in the sense of a content explanation, namely a consecutive numbering and the letters L for left and R for right. Each section contains several, e.g. 20, spinning stations 21. Thus, in this example, the ring spinning machine 2 has 54 x 20 = 1080 spinning stations 21.
    A bar 212, 213 is assigned to each section. The bars 212, 213 are thus shown in the diagram 200 in an arrangement that corresponds to the arrangement of the sections on the ring spinning machine 2. The height or area of each bar 212, 213 indicates a value of an output parameter for the respective section. The output parameter is e.g. a hairiness of the yarn 92, which was determined by the yarn monitoring system 5 on the dishwasher 3. A scale 201 for hairiness is shown on the left in the graph 200. Alternatively, the output parameter may be another parameter characteristic of the yarn 92, e.g. a number of thick places per unit length, a number of thin places per unit length, a number of periodic yarn defects per unit length, a number of yarn number fluctuations per unit length or a number of foreign substances per unit length.
    The output parameter values shown in the graphical representation 200 by means of bars 212, 213 - e.g. Hairiness values - are determined by means of statistical processing of values of the parameter characteristic of the yarn 92 - e.g. the hairiness - which are assigned to the spinning stations 21 of the respective section. Statistical processing can e.g. consists in calculating the maximum of all output parameter values which have been determined for any spinning station 21 of the section in question. Alternatively, any other statistical processing known per se can be used, e.g. averaging, median formation, etc. Statistical processing can relate to a single doff or to several doffs. It can take into account a single value or several values for one cop 91 each.
    Instead of a bar chart, other forms of graphic representations can be used according to the invention, e.g. a line diagram, a network diagram, a dot diagram etc.
    In addition to the output parameter values, further information can be shown in the graphical representation 200. In the example of FIG. 2, a broken line 221 shows values of a parameter characteristic of the operation of the spinning stations 21. The values of the parameter characteristic of the operation of the spinning stations 21 are determined separately by the spinning monitoring system 4 at each spinning station 21, as described on the occasion of FIG. 1. In order to obtain a value for each section, the values determined for the spinning stations 21 of a section can be processed statistically to a value which is shown in the graphic representation 200. Such a graphic representation 200 enables a comparison between the values of the parameter characteristic of the yarn and the parameter characteristic of the operation of the spinning station. From this comparison, conclusions can be drawn for a further optimization of the ring spinning system 1.
    CH 714 693 A2 The graphic representation 200 can be referred to as the "quality card" of the ring spinning machine 2. It enables the operator to get a quick, simple and intuitive overview of the individual sections.
    A permissibility criterion can be specified for the output parameter values. In the exemplary embodiment in FIG. 2, hairiness values below 4 are regarded as permissible and above 4 as impermissible. Those bars 213 with inadmissible values are shown graphically differently, e.g. with darker filling, with a different color etc. than those bars 212 with permissible values. This makes it easier for the operator to quickly identify sections in which there are possibly poorly functioning spinning stations 21.
    The admissibility criterion described above as an example is absolute because it uses the hairiness value 4 as a fixed limit value. Alternatively or additionally, the admissibility criterion can be relative, in that it refers to output parameter values of other subsets of spinning stations 21. For example, an average and a standard deviation of the output parameter values of all subsets are determined. Output parameter values that deviate from the mean by more than twice the standard deviation are considered inadmissible.
    In order to find possibly malfunctioning spinning stations 21, the operator can select one of the sections by means of an input on the input unit 61 in order to find out more details about them. The entry can e.g. consist in selecting the relevant bar in the graphical representation 200 or in an alphanumeric entry of the name of the relevant section. In the example of FIG. 2, section 7L is selected, which is indicated in FIG. 2 by an ellipse 215.
    After a section 7L has been selected, a further graphic representation 300 can be output to the operator on the output unit 61. An example of such a graphical representation 300 is given in FIG. 3. Here the selected section 7L (FIG. 2) is broken down into its individual spinning positions 21 (FIG. 1). Each spinning station 21 is a subset of all spinning stations 21 of section 7L. At the bottom of the graphical illustration 300, the section 2 'is schematically reduced, simplified and provided with explanations. 3, the section 2 'has a total of 20 spinning stations 21. Every second spinning station 21 is identified in the graphical illustration 300 with a unique designation, namely a consecutive numbering, starting with 701, and the letter L for the left.
    An output parameter value from the values of hairiness, which are assigned to the respective spinning station 21, is shown in the graphical representation 300 as point 312, 313. A scale 301 for hairiness is shown on the left in the graph 300. The points 312 of adjacent spinning stations 21 are each connected with a line 314, which results in a line diagram. Such a line diagram could alternatively be used in the graphical representation 200 of FIG. 2, and conversely the line diagram 300 of FIG. 3 could alternatively be replaced by a bar diagram as in FIG. 2. As in FIG. 2, values of a parameter characteristic of the operation of the spinning stations 21 could also be shown in FIG. 3 in addition to the output parameter values.
    Even if the graphical representation 300 relates to individual spinning stations 21, the graphically represented output parameter values can be calculated by means of statistical processing of values of the parameter characteristic of the yarn. An output parameter value can e.g. be an average of several values determined at different times during the rewinding of a single cop 91 and assigned to the relevant spinning station 21 or of several values determined during the rewinding of different cops 91 and assigned to the relevant spinning station 21.
    Analogous to the graphical representation 200 from FIG. 2, the predefined admissibility criterion can also be applied to the output parameter values in the graphical representation 300 from FIG. 3. In the example of FIG. 3, the point 313 of the output parameter value of the spinning station 716L, which is greater than 4, is marked with a circle 316. Thanks to this highlighting, the operator immediately recognizes that the spinning unit 716L may malfunction and require intervention. 3, a relative admissibility criterion can also be used as an alternative or in addition to the absolute admissibility criterion.
    Finally, FIG. 4 shows a further example of a graphic representation 400 as it can be represented on the output unit 61. The representation 400 is analogous to the representation 200 from FIG. 2, which is why corresponding elements are designated with analog reference numerals and are not explained again here. The representation 400 in turn shows schematically a ring spinning machine 2 with 54 sections and output parameter values for each section. The characteristic parameter for the yarn here is e.g. the mass nonuniformity of the yarn 92, the scale 401 of which is shown on the left. With a point 411 in each case, a mean value (or alternatively a median) of the values of the mass unevenness of the yarn 92 for the section in question is shown as the first output parameter. Furthermore, a floating bar 412, 413 is shown for each section, the first end of which - as the second output parameter - represents the smallest value measured in the section and the second end - the second output parameter - represents the largest value of the mass unevenness of the yarn 92 measured in the section , The height or the area of the bar 412, 413 is therefore a measure of the spread of the values of the mass unevenness in the section in question.
    In the example of FIG. 4, two admissibility criteria are specified. A first admissibility criterion is that an inadmissible situation exists if the average value of a section is over 20%. A second admissibility criterion is that a spread of over 5% within a section is not permitted. So there are sections such as the section
    CH 714 693 A2
    5L, the mean value 411 of which is in the permissible range, but whose scatter 413 is in the impermissible range and which is therefore impermissible overall. Inadmissible sections can be examined in more detail on the basis of a detailed view, as shown in FIG. 3, in order to then carry out interventions at those spinning stations 21 which may function poorly.
    Of course, the present invention is not limited to the embodiments discussed above. With knowledge of the invention, the person skilled in the art will be able to derive further variants which also belong to the subject of the present invention. For example, Different graphic elements, which are shown in FIGS. 2-4, are combined with one another to form further graphic representations.
    REFERENCE SIGN LIST [0056]
    Ring spinning plant
    Ring spinning machine
    spinning unit
    Transport of a cop from the ring spinning machine to the dishwasher
    dishwasher
    winding station
    Feeding empty head sleeves from the dishwasher to the ring spinning machine
    Spin monitoring system
    Spinning sensor first data line
    Spin monitoring control unit third data line
    Spin expert system
    Garnüberwachungssystem
    Yarn sensor second data line
    Yarn monitoring control unit fourth data line
    Yarn expert system central control and evaluation device mobile device
    Kops
    yarn
    CH 714 693 A2
    bobbin
    200 graphical representation
    201 scale for output parameters «hairiness»
    212 bars with permissible value
    213 bars with invalid value
    215 Mark for selected section
    300 graphical representation
    301 scale for output parameters «hairiness»
    312 point with permissible value
    313 point with invalid value
    314 Connection line between two points
    316 Mark for point with invalid value
    400 graphical representation
    401 scale for output parameters «mass non-uniformity»
    411 point
    412 bars with permissible value
    413 bars with illegal value
    权利要求:
    Claims (19)
    [1]
    claims
    1. A method for operating a ring spinning system (1), which includes a ring spinning machine (2) with a plurality of spinning stations (21) and a dishwasher (3) with a plurality of winding stations (31), with yarn at each of the spinning stations (21) (92) is spun and wound into a bobbin (91), the bobbins (91) are transported from the spinning units (21) to each of the winding units (31), at each winding unit (31) the yarn (92) from the respective one Kops (91) is rewound onto a bobbin (93) and during the rewinding of a respective bobbin (91) at least one value of a characteristic of the yarn (92)
    Parameters determined and assigned to the spinning station (21) on which the cop (91) was wound up, characterized in that a plurality of different subsets of all spinning stations (21) is formed, for each of the subsets an output parameter value from the values of the the yarn (92) characteristic parameters that are assigned to the spinning stations (21) of the respective subset is determined, for the plurality of subset the output parameter values depending on the subset for which they were determined, together in a graphic representation (200, 300 , 400) are graphically displayed and the graphical representation (200, 300, 400) is output to an operator in a form that is visually detectable.
    [2]
    2. The method of claim 1, wherein all subsets from the plurality of subsets are disjoint, each of the subsets consists of the same number of spinning stations (21) and this number is preferably between 1 and 100.
    [3]
    3. The method according to any one of the preceding claims, wherein each output parameter value is calculated by means of statistical processing of values of the parameter characteristic of the yarn (92), which are assigned to the spinning station (21) or the spinning stations (21) of the respective subset.
    [4]
    4. The method according to any one of the preceding claims, wherein at least one of the subsets consists of a plurality of spinning stations (21), a plurality of different subsets of all spinning stations (21) of this at least one subset are formed on the basis of a corresponding input by the operator,
    CH 714 693 A2 an output parameter value for each of the subsets from the values of the characteristic of the yarn (92)
    Parameters which are assigned to the spinning stations (21) of the respective subset, the output parameter values for the plurality of subset as a function of the subset for which they were determined are graphically displayed together in a graphical representation (300) and the graphical representation (300) is output to an operator in a form that is visually detectable.
    [5]
    5. The method of claim 4, wherein all subsets of the plurality of subsets are disjoint, each of the subsets consists of the same number of spinning stations (21) and this number is preferably 1.
    [6]
    6. The method according to any one of the preceding claims, wherein the subsets or subsets on the ring spinning machine (2) can be locally delimited from each other and the graphic representation (200, 300, 400) essentially a reduced, simplified and explanatory illustration of the ring spinning machine (2) or parts (2) of the same and the output parameter values in an arrangement which corresponds to the arrangement of the partial quantities or partial quantities on the ring spinning machine (2).
    [7]
    7. The method according to any one of the preceding claims, wherein the union consists of all subsets from the plurality of subsets from all spinning stations (21) of the ring spinning machine (2).
    [8]
    8. The method according to any one of the preceding claims, wherein at least one admissibility criterion is specified for the output parameter value and those output parameter values that meet the admissibility criterion are represented graphically differently than those output parameter values that do not meet the admissibility criterion.
    [9]
    9. The method according to any one of the preceding claims, wherein the at least one value of the parameter characteristic of the yarn (92) is assigned to the spinning station (21) on which the cop (91) has been wound by the cop (91) having an identification carrier is assigned, an identification of the spinning station (21) is assigned to the identification carrier, the identification carrier at the respective winding station (31) is read out and the identification of the spinning station (21) is determined on the basis of the identification carrier.
    [10]
    10. The method according to claim 9, wherein the at least one value of the parameter characteristic of the yarn (92) is assigned to a time when the cop (91) is wound up by assigning an identification of the time of winding up to the identification carrier, the identification carrier at the respective one The winding unit (31) is read out and the identification of the time of winding up is determined on the basis of the identification carrier.
    [11]
    11. The method according to any one of the preceding claims, wherein an intervention on the ring spinning machine (2) is carried out on the basis of the graphic representation (200, 300, 400).
    [12]
    12. The method according to claim 11, wherein the intervention on the ring spinning machine (2) comprises an action from the following set: changing a specification for a spindle speed, replacing a ring traveler, replacing a stretch strap, changing a pressure cylinder, changing the air temperature, changing the air humidity ,
    [13]
    13. The method according to claim 11 or 12, wherein a recommendation for the intervention on the ring spinning machine (2) is generated automatically and in addition to the graphic representation (200, 300, 400) is output to the operator.
    [14]
    14. The method according to any one of the preceding claims, wherein the characteristic for the yarn (92) is selected from the following set: coefficient of variation of the yarn mass, coefficient of variation of the yarn diameter, hairiness, number of thick spots per unit length, number of thin spots per unit length, number of periodic yarn defects per Length unit, number of yarn number fluctuations per length unit, number of foreign substances per length unit.
    [15]
    15. Ring spinning system (1), comprising a ring spinning machine (2) with a plurality of spinning stations (21) for spinning yarn (92) and for winding the yarn (92) onto a cop (91), a dishwasher (3) a plurality of winding units (31) for rewinding the yarn (92) from a respective cop (91) to a yarn spool (93), a yarn monitoring system (5) for monitoring properties of the yarn (92) with a yarn sensor (51) each of the winding units (31) for measuring a thread measurement quantity and a thread monitoring control unit (53) connected to the thread sensor (51), which is set up to receive values of the thread measurement quantity from the thread sensor (51) of a winding unit (31), therefrom during rewinding of a cop (91) to determine at least one distance of a parameter characteristic of the yarn (92) and to assign the at least one determined value to the spinning station (21) on which the cop (91) was wound up, and a transport system for Transporting (22) a cop (91) from the spinning station (21) to one of the winding stations (31), characterized by a central control and evaluation device (6) connected to the yarn monitoring control unit (53), which is set up to
    CH 714 693 A2 to receive the values of the parameter characteristic of the yarn (92) from the yarn monitoring control unit (53) to form a plurality of different subsets of all spinning stations (21), for each of the subsets an output parameter value from the values of the for the yarn (92) characteristic
    Determine parameters that are assigned to the spinning stations (21) of the respective subset, for the majority of subset to display the output parameter values depending on the subset for which they were determined in a graphical representation (200, 300, 400) and output the graphical representation (200, 300, 400) to an operator in a form that is visually detectable and thereby provide a basis for intervention on the ring spinning machine (2).
    [16]
    16. ring spinning system (1) according to claim 15, wherein the central control and evaluation device (6) with the yarn monitoring control unit (53) is identical.
    [17]
    17. Ring spinning system (1) according to claim 15 or 16, wherein the central control and evaluation device (6) includes an input unit (61) and is set up, on the basis of a corresponding input unit (61), the operator entering at least one of the operator To subdivide subsets consisting of several spinning stations (21) into a plurality of different subsets of all spinning stations (21) of the at least one subset, for each of the subsets an output parameter value from the values of the characteristic of the yarn (92)
    To determine parameters which are assigned to the spinning units (21) of the respective subset, for the majority of subset the graphical representation (300) of the output parameter values depending on the subset for which they were determined, and to display the graphical representation ( 300) to be output to an operator in a form that is visually detectable.
    [18]
    18. Ring spinning system (1) according to one of claims 15-17, wherein the central control and evaluation device (6) is set up to automatically generate a recommendation for the intervention on the ring spinning machine and in addition to the graphical representation (200, 300, 400 ) to the operator.
    [19]
    19. Ring spinning system (1) according to one of claims 15-18, wherein the ring spinning system (1) includes a plurality of yarn monitoring systems (5), the yarn monitoring control units (53) of which are connected to a yarn expert system (55) which is set up to
    To receive data from the yarn monitoring control units (53), to process and output them in a suitable form, and to control the yarn monitoring control units (53), which is connected to the central control and evaluation device (6).
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    CH6762018|2018-05-28|
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