• 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:
    Extract: Assembly for manufacturing a group of parts and identification device An assembly for manufacturing a group of parts from a plate body 5 comprises input means (20, 30) for providing a plate body, a cutting device (25) for each part to release the group from the plate body according to a predetermined contour and a control device (50) to which the cutting device is coupled. The control device controls the cutting device on the basis of contour information (55). Product recognition means (35) are provided which comprise at least one image sensor (31) and image processing means (50). The image processing means are capable and adapted to identify the parts based on the contour information (55). FIG. 115
    公开号:NL2021910A
    申请号:NL2021910
    申请日:2018-10-31
    公开日:2019-05-06
    发明作者:Josephus Wilhelmus Johannes Kuunders Willem
    申请人:Kumatech Beheer B V；
    IPC主号:
    专利说明:

    Assembly for manufacturing a group of parts and identification device
    The present invention relates to an assembly for manufacturing a group of parts from a plate body, comprising input means for providing a plate body, a cutting device for releasing each part of the group from the plate body in a predetermined, form-closed contour and a control device to which the cutting device is coupled, wherein the control device imposes a cutting line on the cutting device for each component on the basis of obtained contour information in order to free the component from the plate body. The invention also relates to an identification device.
    An assembly of the type described in the preamble is widely used for the manufacture of flat parts from sheet material. This relates in particular to metal parts which are freed from a metal plate body by means of a laser or other cutting tool. From the point of view of saving on material costs, it is of great importance here to free as many parts as possible from the plate body with the least possible loss of material. To that end, the cutting device is controlled by the control device according to a sophisticated cutting line in which the contours of the parts are arranged as efficiently as possible. This cutting line is calculated on the basis of the contour information from which a contour is known for each part. The term "cutting line" can be interpreted broadly in such a way that it is understood to mean not only a purely linear trajectory but also a curved trajectory and compositions of curved and straight line sections.
    The possible rearrangement of the components for optimum utilization of the plate body has the consequence that the order of the components may be relatively arbitrary as regards their destination. With a view to further processing, the components are therefore in practice usually sorted out manually and forwarded for further processing. However, this is time-consuming and moreover prone to errors.
    The present invention therefore has for its object, inter alia, to provide an assembly for manufacturing parts from a plate body which at least to a large extent meets this problem.
    To achieve the intended purpose, an assembly of the type described in the preamble is characterized for this purpose in that product recognition means are provided which comprise at least one image sensor and image processing means, that the image processing means are capable and adapted to form the parts on the basis of the contour information and that automatic product processing means are provided that independently further process each part of the group based on an identification obtained from the image recognition means thereof. The product information, which is already available for controlling the cutting device, is thus once again advantageously utilized to identify the parts that are ultimately cut out. After all, this information comprises at least the contour information obtained for each part, which information appears to be effective for automatic recognition of each part by the image processing means. Manual sorting of the separated parts is hereby superfluous, at least minimized.
    In view of the latter, a special embodiment of the assembly according to the invention has the feature that the product processing means comprise a manipulator which is capable and adapted to receive, move and deliver the component in a controlled manner. Such a manipulator is, for example, based on a robot and is for instance capable of bringing the parts together and collecting them according to destination or according to a subsequent processing step.
    A further particular embodiment of the assembly has the feature according to the invention that the product processing means comprise marking means which are capable and adapted to provide a component with an identification code, and more particularly that the marking means comprise means from a group comprising printing means , labeling, engraving and a laser. Thus, after being released from the plate body, the parts are directly recognizable on the basis of the marking applied thereto. Depending on the situation, the identification code can be applied directly to the product, for example in the form of a printing or engraving, or applied to it via a removable (self-adhesive) label.
    To promote rapid and reliable recognition of the parts, it is important that the image sensor is focused on the part. For this purpose, a preferred embodiment of the assembly according to the invention has the feature that the optical image sensor is arranged so as to be adjustable in a height direction and can be controlled to position the image sensor at least almost always at its focal length of the component.
    In particular, it is about being able to adequately accommodate thickness variations of the plate bodies. Such a product thickness can for instance be obtained as product information together with the contour information, in which case the image sensor can be adjusted on the basis thereof. A further special embodiment of the assembly, however, has the feature according to the invention that a thickness sensor is provided which is capable and adapted to record a plate thickness of the plate body and that the image sensor on the basis of the plate thickness registered by the thickness sensor at its focal length of a main surface of the part is positionable. This embodiment provides its own thickness measurement so that an optimal focusing of the image sensor will always be possible, regardless of whether the product information already contains such thickness information or will be sufficient for it.
    A further special embodiment of the assembly according to the invention has the feature that the contour information is stored in a product database and that both the control device of the cutting device and the image processing means have access to it. The cutting device and product recognition means thus draw on a common information source, so that separate storage and input are unnecessary. A further integration is thereby realized in a further special embodiment of the assembly which is characterized in that the cutting device, the image processing means and the product processing means are controlled by a common control device. Thus, the control of the cutting device, the product recognition means and the product processing means are in common by an overarching control system.
    The invention will be explained in more detail below with reference to an exemplary embodiment and an accompanying drawing. In the drawing:
    Figure 1 shows a schematic overview of an exemplary embodiment of an assembly according to the invention;
    Figure 2 is a perspective view of image recognition means from the assembly of Figure 1;
    Figure 3 is a sectional view of the image recognition means of Figure 2; and Figure 4 shows a perspective detail view of the image recognition means of Figure 2.
    It should be noted, incidentally, that the figures are drawn purely schematically and not always on (the same) scale. In particular, for the sake of clarity, some dimensions may be exaggerated to a greater or lesser extent. Corresponding parts are designated in the figures with the same reference numeral.
    Figure 1 schematically shows a construction of an assembly as intended within the scope of the invention for manufacturing parts from a plate body. The assembly comprises input means 20, typically in the form of a driven conveyor belt, with which a plate body 10 is fed into a cutting device 25. The plate body 10 is typically made of metal, such as (stainless) steel, aluminum, brass or copper with a typical thickness of a few tenths of a millimeter to a few tens of millimeters with a different surface structure, for example blank, polished, brushed or polished, and design .
    The device shown here is suitable for sheet material of 0.5 to 20 millimeters thick.
    The cutting device 25 comprises one or more lasers, not shown in more detail, which are capable and adapted to cut through the plate material. Each laser is thereby controlled from a control device 50 in the form of a central server. A product database 55 is linked to this, in which contour information is stored. This information comprises at least the contour of the part to be cut. By means of software provided for this purpose, the contours of all parts to be cut from the same sheet material are combined as optimally as possible in order to minimize a cutting loss. This results in a cutting line for the laser with which the parts are freed from the plate material, which is shown diagrammatically in the figure at the exit of the cutting device.
    Although the components are optimally nested in the plate body with a view to optimum utilization of the surface, they are therefore relatively unordered with regard to their destination or further processing. The sheet material 12 containing the separated parts, or the parts separately, is therefore fed into a product recognition device 35. For this purpose, this device also has input means 30 in the form of an endless belt. The belt 30 is typically driven at a speed of the order of between 5 and 10 cm / s. The shredded plate body 12, or the individual parts, can be placed thereon by an operator or directly taken from the output belt 20 of the cutting device 25.
    The product recognition device, like the cutting device 25, is coupled to the central server 50 and therefore has access to the product information stored in the database 55. The product recognition device comprises an image sensor 31 which is mounted on a linear height guide 33 through a carriage 32 and is adjustable over it. The image sensor here comprises a vari contact CIS monochrome image sensor with a length of 1040 millimeters and a focus height of 10 ± 0.25 millimeters. To protect the sensor 31 against possible crash hazards of the product, a mechanical stop valve is mounted with an inductive safety switch.
    Because of the focus tolerance of the sensor 31, the carriage 32 is driven on the basis of thickness information of the plate body 12 or the component to be scanned, so that the component will always be in focus of the image sensor 31. This thickness information is recorded in real time by means of a thickness sensor 34 provided for this purpose in the device 35. The thickness sensor 34 is based here on an optical sensor, for example a through-beam photo-electric switch with a parallel laser line of 30 mm high. The output of (the amplifier of) the height detection sensor 34 is in milli-Ampere. The conversion from mA to mm is regulated in the software. A zero point calibration is performed for the sensor 34 in advance.
    The image recognition requires a height accuracy of ± 0.25 millimeters. Therefore, if the altitude is to be corrected "on the fly," the altitude sensor 34 should be relatively accurate.
    The flatness and thickness variation of conveyor belt 30 in combination with that of the product and a measurement inaccuracy of the sensor 34 provide a greater tolerance field than ± 0.25 millimeters. The sheet thickness is also included in the batch information 55.
    When loading the batch, the height in the device is set. The height sensor 34 in that case mainly serves as a control sensor for fine tuning.
    The image sensor scans a component on-the-fly and compares the recorded contour thereof with contour information from the product database 55. These data have been collected as a batch for the preparation for nesting of cutting group for the laser cutting machine 25 and comprise at least least one contour of each cut part. The comparison method functions according to a funnel filter: First the rough dimensions are compared, whereby a large part falls out of the database. The scan is then viewed and compared more accurately. Always a gradation more accurate, until a correct agreement is found. In a match, the component is recognized as such and thus identified. In addition, further product information is obtained from the component, including a correct identification code. The entire process for an operator can be followed and adjusted on a screen 45.
    The XYZ coordinates of the relevant component on the belt 30 are now also known. These coordinates are given to product processing means that are provided downstream. In this example, these processing means comprise a printing unit 41 in combination with a labeling device 42 (label writer). The printing unit 41 is based on a carriage which is conventionally mounted over a linear guide 40 and, moreover, is height-adjustable. On the basis of the XYZ coordinates obtained, the printhead 41 can thus be sent to the correct part. With this, for example, an identification code can be printed on the relevant part. Other data from the product database 55 can also be obtained, for example a drawing number or information about subsequent processing steps such as edging, brushing and or welding, and be indicated as such on or near the part. An angular rotation can also be given to the printing, geared to a registered location of the part on the belt 30, so that the printing is correctly aligned with the part.
    For products that cannot or may not be printed, for example because the available surface area thereof is too small, a label is printed out by the printer 42 and attached to the component. The part 14 thus identified and marked for further processing can now be removed from the belt 30 by an operator or automatically distributed by suitable pick-and-place means.
    Although the invention has been further elucidated above with reference to only a single exemplary embodiment, it will be apparent that the invention is by no means limited thereto. On the contrary, many variations and manifestations are still possible for the average person skilled in the art within the scope of the invention. For example, the processing means and recognition means for the components in the example are accommodated in a common cabinet, but they can also be provided separately in a separate housing. The contour information necessary for the recognition of the components by the image processing means can be directly derived from the contour information with which the cutting device is fed and controlled, but can also be derived arithmetically or indirectly from it or therefrom.
    权利要求:
    Claims (9)
    [1]
    An assembly for manufacturing a group of parts from a plate body, comprising input means for providing a plate body, a cutting device for releasing each part of the group from the plate body according to a predetermined, form-locked contour and a control device to which the cutting device is coupled wherein the control device imposes a cutting line on the cutting device on the basis of obtained contour information for releasing the component from the plate body, characterized in that product recognition means are provided which comprise at least one image sensor and image processing means, which enable the image processing means and be adapted to identify the parts on the basis of the contour information, and that automatic product processing means are provided which further independently process each part of the group on the basis of an identification obtained from the image recognition means thereof.
    [2]
    2. Assembly as claimed in claim 1, characterized in that the product processing means comprise a manipulator which is capable and adapted to receive, move and deliver the component in a controlled manner.
    [3]
    An assembly according to claim 1 or 2, characterized in that the product processing means comprise marking means which are capable and adapted to provide a component with an identification code.
    [4]
    Assembly according to claim 3, characterized in that the marking means comprise means from a group comprising printing means, labeling means, engraving means and a laser.
    [5]
    5. An assembly according to any one or more of the preceding claims, characterized in that the optical image sensor is arranged adjustable in a height direction and can be controlled to position the image sensor at least almost always at its focal distance of the component.
    [6]
    An assembly as claimed in claim 5, characterized in that a thickness sensor is provided that is capable and adapted to record a plate thickness of the plate body and that the image sensor is based on the plate thickness registered by the thickness sensor at its focal length of a main surface of the plate surface. component is positionable.
    [7]
    An assembly as claimed in one or more of the preceding claims, characterized in that the contour information is stored in a product database and that both the control device of the cutting device and the image processing means have access to it.
    [8]
    Assembly according to one or more of the preceding claims, characterized in that the cutting device, the image processing means and the product processing means are controlled by a common control device.
    [9]
    Identification device comprising the product recognition means according to one or more of the preceding claims.
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    同族专利:
    公开号 | 公开日
    NL2021910B1|2019-05-31|
    NL2019835B1|2019-05-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO1986006676A1|1985-05-17|1986-11-20|Ersue Enis|Process and installation for automatically cutting plane-parallel workpieces|
    US20070193655A1|2006-02-07|2007-08-23|Columbia Forest Products, Inc.|Extraction of non-contiguous component panels from a panel|
    DE102014204695A1|2014-03-13|2015-09-17|Holzma Plattenaufteiltechnik Gmbh|Method for operating a plate processing plant|
    EP3219426A1|2016-03-14|2017-09-20|HOMAG Plattenaufteiltechnik GmbH|Board treatment device and method for dividing at least one workpiece having a board processing device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL2019835A|NL2019835B1|2017-10-31|2017-10-31|Assembly for manufacturing a group of parts and identification device|
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