• 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:
    Sharpening system for flexible material cutting blades in automatic cutting machines. The sharpening system for cutting blades of flexible materials in automatic cutting machines comprises at least one sharpening element, and also comprises a first sharpening module that includes at least one first sharpening element (3) and a second sharpening module. which includes at least one second sharpening element (5). It allows to provide a sharpening system that provides a comprehensive and simple solution to current sharpening systems, incorporating an active sharpening system on the guide plate, either in the rotating area or outside or symmetrically in the upper part of the lower body of the head. of court indistinctly. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2779150A2
    申请号:ES201930107
    申请日:2019-02-11
    公开日:2020-08-13
    发明作者:Mercadé Antoni Balsells
    申请人:Open Mind Ventures Slu；
    IPC主号:
    专利说明:

    [0002] Sharpening system for flexible material cutting blades on automatic cutting machines
    [0004] The present invention refers to a sharpening system for flexible materials cutting blades in automatic cutting machines, which allows to provide a comprehensive and simple solution to current sharpening systems, incorporating an active sharpening system in the lower guide plate, or symmetrically in the upper part of the lower body of the cutting head indistinctly.
    [0006] Background of the invention
    [0008] Numerical control cutters for flexible multilayer or monolayer materials need to sharpen the blades frequently during the execution of their functions.
    [0010] Flexible materials, such as textiles, composites, etc., to be cut require very sharp blades, since otherwise they drag the material obtaining undesirable results.
    [0012] For this reason, unlike other types of numerical control cutting machines, they need to incorporate sharpening systems designed so that this sharpening function runs frequently, such as from minutes to seconds, varying with hardness, abrasion resistance, smoothness, degree of fusion, etc. of each material as it is cut. This sharpening time is variable and it is a time when the machine is not cutting, therefore reducing its productivity.
    [0014] These numerical control cutting machines comprise a cutting head, made up of an upper body and a lower body. The upper body of said cutting head houses the blade vibration module, the actuators, etc., while the lower body of said cutting head houses the lower rotating guide plate, the sharpening system (indistinctly in the lower part or superior of said lower body), etc.
    [0016] The blade vibration module is mounted on a vertical mobile system that allows the height of the blade to be varied so that when cutting, the blade is placed in a lower position within the material to be cut, bringing the blade closer to the plate guide bottom pressing materials being cut. Said lower rotating guide plate has a variable height depending on the thickness of the material to be cut. The vibration module is arranged in the upper body of the cutting head.
    [0018] The function of the lower body is to guide the blade vertically in the direction of vibration, and it also accompanies and guides the blade in the turns from 0 ° to 360 °, which are necessary to be able to orient the blade in the direction of the profiles that numerical control system commands.
    [0020] Said lower body guides and accompanies the blade, both vertically and in turns, but these movements are generated in the upper part (it is in the upper part where there are the actuators, whether they are motors, pistons, etc. that generate the movements blade).
    [0022] This lower part consists of a rotating pressure guide plate that has a vertical movement independent of the movement of the blade. The blade passes through this rotating guide plate and enters, freed from any clamping or guide, into the cutting area itself, where the flexible material to be cut is located.
    [0024] The rotating guide plate rests with greater or lesser force on the material to be cut, which may or may not be compressed. The rotating guide plate constitutes a fundamental element, since it is the last mechanical assembly that accompanies and keeps the blade rigid before it penetrates the material to be cut, forming a true line of separation between the cutting head assembly. and the material to be cut.
    [0026] During the sharpening function, the blade has to come out of the material, being released so that the sharpening elements come into contact with the edge of the same, thus being interrupted the cutting function while the sharpening is carried out. Said sharpening elements are, for example, flexible abrasive bands, sharpening wheels, active or passive, with different designs and abrasive materials whatever their arrangement.
    [0028] Often the sharpening elements are arranged in a predetermined and fixed position on the cutting head, the blade having to rotate to find this sharpening position on one or both sides of the blade.
    [0030] In other cases, the sharpening systems are rotary and inertial, so the blade when Exit the cut material is located in a bi-directional rotary position. In these cases, the abrasive elements are in suspension, and the entire lower body is rotated, together with the blade, so that the inertial movement brings said abrasive elements into contact with the blade.
    [0032] There are also other sharpening systems that rotate with the blade, instead of having a predetermined and fixed position; in this way, when the blade leaves the cutting area, it is sharpened without having to position itself for this purpose.
    [0034] These sharpening system designs are located on the lower body of the cutting head, either on top (active sharpening systems) or on the lower rotating guide plate (passive sharpening systems).
    [0036] In active sharpening systems, the abrasive elements are in motion, this movement being derived from some external mechanism activated by pulleys, pistons, electromagnets, etc., which transmit movement to these abrasive elements. Active sharpening is the one that provides the highest quality of cut.
    [0038] There are also some designs in which the sharpening mechanisms are passive, that is, the elements that contain the abrasive material are not linked to any external movement. Their movement, if they are mobile, comes from the friction of the blade itself with this sharpening element, generally grinding wheels in an arrangement that allows rotation by friction when both elements come into contact: grinding wheel and blade.
    [0040] For sharpening to be carried out, therefore, several conditions are necessary: stop of the vector movement of the cutting machine, exit of the blade of the material being cut, contact of the sharpening element with the cutting element (blade) and a guiding system that keeps the abrasive elements aligned with the blade.
    [0042] These elements, in turn, configure the physical dimension (kinematics) and the productivity of the cutting machines, because the sharpening function is frequent and essential, affecting this dimension and weight to the entire design of the machine: the power of the motors, the resistance of the support elements, the maintenance cost, the CO2 load, the cost of manufacturing, transport, installation, etc. throughout the product life cycle.
    [0043] The sharpening systems that are mounted on the lower rotating guide plate, integral with the guide systems, are advantageous because they require shorter blades that in turn reduce flex and weight, resulting in a better cut and a cheaper replacement, and are They sharpen practically from the moment the blade leaves the material to be cut, providing sharpening speed and therefore productivity.
    [0045] In the systems that are mounted leaning on the lower rotating guide plate, we can find two variants, the rotating ones that rotate in solidarity with the blade guide, allowing the blade to be sharpened directly when leaving, and those that are located on the outside of the plate. , which have a fixed position and do not rotate in solidarity with the guide of the blade, so they require that the blade, after leaving the cutting material, rotate to orient itself towards the sharpening elements.
    [0047] Currently, there is no system on the market that allows it to be mounted on the guide of the rotating plate and to have an active sharpening, that is, with movement of the abrasive elements. Therefore, they are systems that have a sharpening that can be improved, being differential, since a well-sharpened blade implies more cutting speed, less friction and therefore less temperature. In short, a more precise and clean cut.
    [0049] There are also no active sharpening systems mounted on the outside of the plate, although these are less efficient because the blade cannot come out and in real time, during the outlet, be sharpened regardless of the position (angle) in which the blade is located and the rotational guide located inside the guide plate. In this case, the blade has to come out of the cutting material first, and then turn the angle to the fixed position where the sharpening system is oriented.
    [0051] Another drawback in current sharpening systems, regardless of their design, is that they do not have control over the exact position of the abrasive elements relative to the blade during sharpening, when the blade becomes worn. Currently these are activated by mechanisms that include pistons, motors, springs that serve to activate some and cushion others the impact of the abrasive element with the blade.
    [0053] Ultimately, they are systems that allow them to be adjusted, but are not dynamic as they do not adapt their position to the wear of the blade precisely, only roughly as described; the abrasive element approaches until it collides, more or less gently, with the knife.
    [0055] Furthermore, current systems are not modular, therefore it is impossible to modify the type of abrasive element for each occasion, nor to have a specific design of the support of said abrasive element adapted to each occasion. It is important to note that each material requires an abrasive element and a suitable profile to obtain the maximum performance and quality of sharpening. This affects the quality of cut and also affects productivity and the cost of replacement of inputs, since the frequency of sharpening varies and, therefore, the durability of the grinding wheel and the blade.
    [0057] These elements make up the cutting efficiency and precision that are essential in this type of numerical control cutting equipment.
    [0059] Therefore, an objective of the present invention is to provide a sharpening system that provides a comprehensive and simple solution to current sharpening systems, allowing an active sharpening system to be incorporated into the guide plate, either in the rotating area or externally or symmetrically in the upper part of the lower body of the cutting head indistinctly, also allowing the sharpening system to have a modular configuration of the abrasive elements according to the application (abrasive drum (hollow sharpening), disc (flat sharpening), abrasive belt , friction tablet, etc.), being able to combine two systems indistinctly and simultaneously such as: dynamic active rotating drum or disk systems or an active disk or drum system with a friction tablet or any combination of abrasive or sharpening elements.
    [0061] Description of the invention
    [0063] With the sharpening system of the invention, the aforementioned drawbacks are solved, presenting other advantages that will be described below.
    [0065] The sharpening system for flexible material cutting blades according to the present invention comprises a first sharpening module that includes at least one first sharpening element and a second sharpening module that includes at least one second sharpening element.
    [0067] According to a preferred embodiment, in which said first sharpening module comprises two first sharpening elements placed opposite each other to both sides of the blade.
    [0069] Furthermore, said first sharpening module preferably also comprises at least one lubricant applicator, which applies a lubricant layer to the blade. According to one embodiment, said first module comprises two lubricant applicators, located facing each other on both sides of the blade.
    [0071] In the first sharpening module, said first sharpening element (s) are (are) movable moving away from and toward said blade, being able to be friction (passive) or motorized (active) indistinctly.
    [0073] For its part, according to a preferred embodiment, said second sharpening module comprises two second sharpening elements placed opposite each other on both sides of the blade, and advantageously said second sharpening element (s) is (are) rotating (s) around their central axis.
    [0075] According to a preferred embodiment, said two sharpening modules specialize in: a first module for passive sharpening by friction on the edge of the blade and a second module for high precision motorized active grinding or sharpening, being very close to the area. guide plate. Despite said preferred embodiment, it is also possible to work with two active grinding modules in their different modalities, drum, belt, disk, etc.
    [0077] Inside the cutting head, the sharpening system for flexible material cutting blades according to the present invention is mounted at the bottom of the lower body of the head (on the rotating guide plate). Said lower plate comprises an outer disc and an inner disc that are mounted around the blade, and said inner disc being movable (rotatable) with respect to said outer disc.
    [0079] Preferably, said outer disc comprises complementary electrical contacts with conductive tracks of said inner disc, for driving said sharpening elements and, furthermore, the outer and inner discs comprise complementary sealing projections and recesses to isolate said electrical elements from dust. and environmental dirt. Said electrical contacts have actuators that advance and retract them, so that they are only in contact with the conductive tracks at the moment of sharpening, thus avoiding friction wear of said electrical elements during the rotational movement of the inner disc with respect to the outer disc. .
    [0080] Advantageously, the inner disk is integral with the blade, and said electrical contacts feed actuators of the at least one first sharpening element and / or of the at least one second sharpening element, so that, when the blade separates from the flexible material to cutting, said actuators are activated automatically, performing the sharpening of the blade by means of the first sharpening module and / or the second sharpening module or alternatively.
    [0082] Alternatively, for electrical transmission, both power and signal, a wireless system such as that described in Spanish patent with application number 201830482, of the same inventor and owner, can be used. Said system described in the Spanish patent with application number 201830482 can replace or complement said conductive tracks and contacts.
    [0084] The sharpening system according to the present invention provides a comprehensive and simple solution to current sharpening systems, and allows active sharpening systems to be incorporated into the rotating guide plate of a numerically controlled cutting machine or symmetrically on top of the lower body of the cutting head indistinctly.
    [0086] It also allows having a modular configuration of the abrasive elements according to the application, such as an abrasive drum (hollow sharpening), disk (flat sharpening), abrasive belt, friction tablet, etc. being able to support different sharpening systems indistinctly that sharpen in a combined or alternative way as necessary to each flexible material to be cut.
    [0088] As the abrasive elements are mounted on a disk that moves integral with the blade, a simple actuation and direct movement of the abrasive element is allowed.
    [0090] Furthermore, the sharpening system according to the present invention is made up of very few elements, freeing up space and simplifying movements and drives, allowing more complex functions to be performed in less space and with fewer components.
    [0092] With the system according to the present invention, these abrasive and sharpening elements can be brought close to the blade in a controlled and smooth manner (with position and approach control), the pressure and position being modifiable in the different stages of consumption of blade and therefore wear and type of sharpening.
    [0093] Brief description of the drawings
    [0095] For a better understanding of what has been stated, some drawings are attached in which, schematically and only as a non-limiting example, a practical case of embodiment is represented.
    [0097] Figure 1 is a first perspective view of the sharpening system according to the present invention;
    [0099] Figure 2 is a second perspective view of the sharpening system according to the present invention;
    [0101] Figure 3 is a perspective view of the sharpening system according to the present invention, showing a second embodiment of the second sharpening module; and
    [0103] Figure 4 is a sectional view between the inner and outer discs, showing the electrical contacts, the conductive tracks, the sealing protrusions and the sealing recesses.
    [0105] Description of a preferred embodiment
    [0107] The sharpening system according to the present invention is used for sharpening the blades of machines for cutting flexible materials, such as cloth or the like.
    [0109] Said cutting machine comprises a blade 1 that cuts the flexible materials and a guide plate 2, which presses against the flexible material to be cut during the moment of cutting.
    [0111] Said guide plate 2 is composed of an outer disc 6 and an inner disc 7, said inner disc 7 being movable with respect to said outer disc 6. The inner disc 7 is integral with the blade, rotating at the same time as the blade, while the outer disc 6 is static and integral with the guide plate 2.
    [0113] The sharpening system according to the present invention comprises two separate sharpening modules; a first module for passive sharpening by friction on the edge of the blade 1 and a second module for sharpening that performs a high-speed motorized active grinding or sharpening precision.
    [0115] The first sharpening module provides a shaving of the edge at the tip of blade 1 for a high quality sharpening without wear of blade 1. It requires minimal time, since it is done at the moment when blade 1 exits guide plate 2 and cut material.
    [0117] This first sharpening module comprises at least one first sharpening element 3, two first sharpening elements 3 in the case of the embodiment shown, placed opposite each other on each side of the blade 1, and operates by friction between the edge of the blade 1 and this passive sharpening element 3 which is harder than blade 1.
    [0119] Said sharpening elements 3 can move towards and away from the blade 1. In this way, in a single exit and entry movement of the blade 1 to the cutting material, the sharpening element (s) renews (n) the edge of the blade 1.
    [0121] Furthermore, the first sharpening module may comprise lubricant applicators 4 for applying lubricant to the blade 1, impregnating it with a very thin layer of lubricant, to improve cutting. Said layer of lubricant cannot be very thick, since in this case it could stain the cut material.
    [0123] The actuation of the first sharpening elements 3 and of the lubricant applicators 4 is carried out by means of first actuators 12, shown in Figures 1 and 2.
    [0125] For its part, the second sharpening module provides a modular high-speed active sharpening, comprising at least one second sharpening element 5, two second sharpening elements 5 in the case of the embodiment shown, which allows the second sharpening element to be exchanged. Sharpening 5 suitable for the application, as seen in Figures 2 and 3. Furthermore, it comprises an independent approach system for each second sharpening element 5 and with dynamic position control, formed by second actuators 13.
    [0127] Furthermore, this second sharpening module also comprises third actuators 14 to drive the rotation around its central axis of said second sharpening elements 5.
    [0128] As shown in figure 4, the inner disk 7 has complementary circular conductive tracks 9 with electrical contacts 8 on the outer disk 6, which allow electrical activation and control of the actuators 12, 13, 14, or others, which are preferably located on the inner disk 7, thus allowing the activation of the different drives and transmission of the signal. It also allows power and signal to pass to other sensors that are located on the inner disk 7.
    [0130] Furthermore, to ensure insulation, the outer 6 and inner 7 discs comprise complementary sealing projections and recesses 10, 11, as also shown in Figure 4.
    [0132] The operation of the first and / or second sharpening modules is carried out at the moment when the cutting head of the cutting machine stops cutting, that is, when the circular, rotary movement of the blade 1 stops, generally but not necessarily for the purpose of sharpening the blade. By having said first and second sharpening modules on the inner disk 7, they are integral with the rotary movement of the blade 1, therefore they are always positioned in the direction of the blade 1 when it leaves the cutting area.
    [0134] In this way, when the blade 1 starts to come out of the material being cut, the conductive tracks 9 of the inner disk 7 come into contact with the electrical contacts 8 of the outer disk 6, which activates the actuators 12, 13, 14 automatically , avoiding unnecessary movements and dead times.
    [0136] Despite the fact that reference has been made to a specific embodiment of the invention, it is obvious to a person skilled in the art that the sharpening system described is susceptible to numerous variations and modifications, and that all the mentioned details can be substituted by others technically equivalents, without departing from the scope of protection defined by the appended claims.
    权利要求:
    Claims (16)
    [1]
    1. Sharpening system for cutting blades of flexible materials in automatic cutting machines, comprising at least one sharpening element, characterized in that it comprises a first sharpening module that includes at least one first sharpening element (3) and a second sharpening module including at least one second sharpening element (5).
    [2]
    Sharpening system for flexible material cutting blades according to claim 1, wherein said first sharpening module comprises two first sharpening elements (3) placed facing each other on both sides of the blade (1).
    [3]
    Sharpening system for flexible material cutting blades according to claim 1, wherein said first sharpening module also comprises at least one lubricant applicator (4), which applies a lubricant layer to the blade.
    [4]
    Sharpening system for flexible material cutting blades according to claim 3, in which said first sharpening module comprises two lubricant applicators (4), located opposite each other on both sides of the blade (1).
    [5]
    Sharpening system for cutting blades of flexible materials according to claim 1 or 2, wherein said first sharpening element (s) (3) is (are) movable moving away from and toward said blade (1).
    [6]
    Sharpening system for flexible material cutting blades according to claim 1, wherein said second sharpening module comprises two second sharpening elements (5) placed opposite each other on both sides of the blade (1).
    [7]
    Sharpening system for flexible material cutting blades according to claim 1 or 6, wherein said second sharpening element (s) (5) is (are) rotatable around of its central axis.
    [8]
    Sharpening system for cutting blades of flexible materials according to claim 1 or 6, wherein said second sharpening element (s) (5) is (are) movable moving away and approaching said blade (1).
    [9]
    9. Sharpening system for flexible material cutting blades according to claim 5 or 8, comprising a position control for the advancement of the first and second sharpening elements (3, 5).
    [10]
    Sharpening system for flexible material cutting blades according to claim 2 or 6, in which said first sharpening element (s) (3) and in which said second Sharpening element (s) (5) are chosen from the group of friction pads, rotating disk, rotating drum and abrasive belt.
    [11]
    Sharpening system for flexible material cutting blades according to claim 1, comprising an outer disk (6) and an inner disk (7) that are mounted around the blade (1).
    [12]
    Sharpening system for flexible material cutting blades according to claim 11, wherein said inner disk (7) is movable relative to said outer disk (6).
    [13]
    Sharpening system for flexible material cutting blades according to claim 11, wherein said outer disk (6) comprises electrical contacts (8) complementary to conductive tracks (9) of said inner disk (7) , to drive said sharpening elements (3, 5).
    [14]
    Sharpening system for flexible material cutting blades according to claim 11, in which the outer and inner discs (6, 7) comprise complementary sealing projections and recesses (10, 11).
    [15]
    Sharpening system for flexible material cutting blades according to claim 11 or 12, in which the inner disk (7) is integral with the blade (1).
    [16]
    Sharpening system for cutting blades of flexible materials according to claim 13, in which said electrical contacts (8) feed actuators (12, 13, 14) of the at least one first sharpening element (3) and / or of the at least one second sharpening element (5).
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    同族专利:
    公开号 | 公开日
    US20200254578A1|2020-08-13|
    JP2020128002A|2020-08-27|
    CN111546413A|2020-08-18|
    ES2779150R1|2020-09-10|
    EP3693131A1|2020-08-12|
    MA52596A|2021-03-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    法律状态:
    2020-08-13| BA2A| Patent application published|Ref document number: 2779150 Country of ref document: ES Kind code of ref document: A2 Effective date: 20200813 |
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201930107A|ES2779150R1|2019-02-11|2019-02-11|Sharpening system for flexible material cutting blades on automatic cutting machines|ES201930107A| ES2779150R1|2019-02-11|2019-02-11|Sharpening system for flexible material cutting blades on automatic cutting machines|
    EP20382081.6A| EP3693131A1|2019-02-11|2020-02-07|Sharpening system for cutter blades for cutting flexible materials in automatic cutting machines|
    JP2020020119A| JP2020128002A|2019-02-11|2020-02-07|Cutter blade sharpening system for cutting flexible material in automatic cutting machine|
    MA052596A| MA52596A|2019-02-11|2020-02-07|CUTTING BLADE SHARPENING SYSTEM FOR CUTTING FLEXIBLE MATERIALS IN AUTOMATIC CUTTING MACHINES|
    US16/787,463| US20200254578A1|2019-02-11|2020-02-11|Sharpening system for cutter blades for cutting flexible materials in automatic cutting machines|
    CN202010087615.8A| CN111546413A|2019-02-11|2020-02-11|Sharpening system for cutting blades for cutting flexible material in automatic cutting machines|
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