Computer-supported manufacturing method and manufacturing system
Through the computer-supported manufacturing method, the order control device is used to automatically identify and supplement the manufacturing of defective workpieces, solving the problems of workpiece damage and material waste during laser cutting, and achieving the effect of reducing costs and improving efficiency.
Patent Information
- Application Number
- CN202380071411.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-10-07
- Filing Date
- 2023-09-29
- Publication Date
- 2025-05-13
AI Technical Summary
The prior art causes damage or defects in the workpiece during laser cutting, resulting in high supplemental manufacturing costs and severe material waste, and conventional methods require multiple manufacturing to prevent delays.
Through a computer-supported manufacturing method, the order control device is used to identify defective workpieces, and the appropriate workpiece blanks are automatically obtained based on the manufacturing information, and supplementary manufacturing is performed to reduce manual processing and material waste.
Reducing additional manufacturing costs for workpiece damage and defective workpieces is achieved, reducing material waste, and improving manufacturing efficiency.
Smart Images
Figure CN119998749A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a computer-assisted production method for producing a workpiece from a workpiece blank by a machine tool according to a planned production sequence. The invention also relates to a production system for carrying out the production method. Background Art
[0002] Such methods are usually applied in the processing of workpiece blanks in the form of metal sheets, which can be fed to the machine tool as sheet metal plates or sheet metal coils. In addition, such methods can be used for material processing. Cutting machines, in particular laser cutting machines and / or punching machines are usually used for processing workpiece blanks.
[0003] During laser cutting, various influences may result in the workpiece being damaged during production or the workpiece being produced defectively by the machine tool. Such damaged or defective workpieces can be recognized by the machine tool or the operator and must then be supplemented (new good workpieces are produced to replace the damaged or defective workpieces) in order to fully complete a production order.
[0004] It is usually provided that defective or damaged workpieces are re-produced in a complex manner, usually manually, by an operator. For the re-production of the individual workpieces, it is usually necessary to use unused workpiece blanks, which can no longer be used in conventional production methods. Therefore, the re-production of these defective or damaged workpieces results in considerable additional costs and considerable material waste.
[0005] Therefore, in order to prevent delays, it is usually provided that individual workpieces or all workpieces in a manufacturing order are manufactured twice or more. In other words, spare workpieces are produced which replace defective and / or damaged workpieces if necessary. Unnecessary spare workpieces must then be disposed of. This results in considerable material waste and significantly longer manufacturing times and is therefore not a suitable solution to the above-mentioned problem. Summary of the invention
[0006] Purpose of the Invention
[0007] The invention is based on the object of providing a method for operating a machining device, with which high manufacturing costs and high material waste due to the remanufacturing / remanufacturing of defective and / or damaged workpieces can be avoided. In addition, the object is to provide a suitable manufacturing system.
[0008] According to the invention, this object is achieved by a computer-supported method according to claim 1. The object is also achieved by a manufacturing system according to claim 8. The dependent claims set forth preferred embodiments.
[0009] According to the present invention, a computer supported manufacturing method is provided.
[0010] The production method is suitable for producing a workpiece from a workpiece blank. The workpiece blank can be present as a plate, for example in the form of a sheet metal plate, and / or as a coil, for example in the form of a sheet metal coil or a material coil.
[0011] The method is provided for using a machine tool, in particular a flat-bed machine tool, with a processing device. The processing device can be designed, for example, as a cutting machine or a punching machine.
[0012] The workpieces are manufactured from the workpiece blanks by the machine tool according to the manufacturing plan. The manufacturing plan includes at least one workpiece to be manufactured. Preferably, the manufacturing plan includes a plurality of workpieces to be manufactured, particularly preferably a large number of workpieces to be manufactured. The manufacturing plan can have a workpiece grouping with a plurality of related workpieces, which, for example, belong to a common structural component. In this case, the method features described here and below can also relate to the workpiece grouping. The manufacturing plan can have workpieces and / or workpiece groupings for different manufacturing orders.
[0013] The manufacturing plan usually contains geometrical manufacturing specifications about the workpiece to be manufactured, such as one or more workpiece dimensions, in particular workpiece thickness, workpiece material, workpiece contour and / or workpiece position on the workpiece blank. The manufacturing information is preferably encoded in a machine-readable manner and contains all relevant information that enables the workpiece to be manufactured, in particular automatically. In other words, manual processing by an operator can be omitted.
[0014] In a further method step, at least one workpiece is manufactured from a workpiece blank according to the manufacturing plan. In other words, the machine tool starts to manufacture the workpiece. For example, a laser cutting machine can start cutting the workpiece to be manufactured from a workpiece blank according to the manufacturing plan.
[0015] In a further method step, a defective workpiece is identified or recognized. A defective workpiece may be understood, for example, as a workpiece that has been defectively manufactured by a processing device, in particular a workpiece that has been manufactured with manufacturing parameters that deviate from the manufacturing plan. Furthermore, a defective workpiece may be formed due to damage to the workpiece during the manufacture of the workpiece and / or during the manufacture of subsequent workpieces. Damage may occur, for example, by a collision between the processing device and the workpiece.
[0016] Defective workpieces can be identified or recognized during manufacturing and / or in the manufactured state. Identifying a defective workpiece means identifying the defective workpiece by inspecting the workpiece. The identification can be performed by an operator. Preferably, the defective workpiece is identified by an inspection device of the machine tool. Particularly preferably, the identification is performed automatically by regularly or permanently monitoring the manufacture of the workpiece in the machine tool. For example, a defective workpiece can be identified by deviations from manufacturing parameters, in particular machine parameters, during the manufacture of the workpiece. In addition, a defective workpiece can be identified, for example, by reporting a collision between a processing device and the workpiece and / or by optically comparing the workpiece with a target state of the workpiece according to the manufacturing plan. The target state of the workpiece can also, for example, relate to the workpiece size, workpiece shape and / or edge quality.
[0017] In a further method step, the manufacturing information about the identified defective workpiece is read by the order control device. For this purpose, the identified defective workpiece can first be reported to the order control device. The report can be made by inputting the defective workpiece into the order control device. Preferably, the order control device is configured to exchange data with an inspection device designed to identify defective workpieces, so that the defective workpiece can be automatically reported. The order control device then reads the manufacturing-related information of the defective workpiece, in particular the workpiece thickness, workpiece shape and workpiece material. Usually, the order control device reads the manufacturing information from the manufacturing plan. From the manufacturing information, the order control device can derive the manufacturing requirements for the workpiece blank to be used. The workpiece blank to be used is usually similar or consistent with the workpiece blank from which the defective workpiece was manufactured.
[0018] In a further method step, the order control device determines, based on the read-out manufacturing information, a workpiece blank which is suitable for completing the production of the defective workpiece in the manufacturing process.
[0019] The planned manufacturing process is to be understood as a workpiece manufacturing process in which a workpiece is manufactured according to another manufacturing plan after the workpiece is manufactured according to the manufacturing plan. In other words, the manufacturing process is provided to further manufacture the workpiece according to the plan from another workpiece blank.
[0020] The manufacturing process may include further manufacturing of workpieces from further workpiece blanks by the machining device and / or further manufacturing of workpieces from further workpiece blanks by at least one further machine tool having a further machining device. In other words, the manufacturing process may include manufacturing of workpieces in further machine tools by further machining devices.
[0021] The order control device is preferably designed and arranged to manage the manufacturing process. The order control device is particularly arranged to create, read and / or change these manufacturing plans in the manufacturing process. The order control device can be designed as a central controller for managing the manufacturing plans of different machine tools.
[0022] In order to find a suitable workpiece blank, the order control device can first read the blank information of the workpiece blank to be used in the production of the workpiece, which is the basis of these production plans in the planned production process. Usually, the order control device then compares the blank information with the production information of the workpiece to be produced in addition. If the workpiece blank meets the production requirements derived from the production information of the workpiece to be produced in addition, the workpiece blank can be found to be suitable.
[0023] In the subsequent method step, the order control device arranges the workpiece to be supplemented on the suitable workpiece blank. In other words, the order control device can change the manufacturing plan determined to be suitable workpiece blank so that the workpiece to be supplemented is manufactured when the manufacturing plan is completed by the processing device.
[0024] According to the invention, a computer-assisted manufacturing method is therefore provided, in which defective workpieces are supplementally manufactured, preferably automatically, in a planned manufacturing process by an order control device. Manual supplementary manufacturing of defective workpieces can thus be dispensed with. Furthermore, workpiece blanks provided for manufacturing workpieces can be used for supplementary manufacturing. This allows material waste to be kept low.
[0025] In a preferred embodiment of the computer-supported manufacturing method, the manufacturing information includes the manufacturing end time of the workpiece to be supplemented. In this case, if the processing of the workpiece blank by the processing device in the manufacturing process occurs before the manufacturing end time, the workpiece blank can be determined to be suitable. In other words, it can be checked whether supplementary manufacturing of defective workpieces will lead to a delay in the delivery date. This allows measures to be taken to supplement the workpieces more quickly, for example, by manual supplementary manufacturing.
[0026] The order control device is preferably configured to automatically execute measures for more urgent additional production. This can further increase the degree of autonomy of the production method.
[0027] Furthermore, the following embodiment of the computer-assisted production method is preferred, in which the production information includes at least one workpiece dimension. If the workpiece to be produced in addition can be arranged on the workpiece blank, in particular in a free space between the planned workpieces to be produced, then this workpiece blank can be determined by the order control to be suitable. In other words, the order control is configured to determine the free space in the production plan of the planned production process. By arranging the workpiece to be produced in addition in the free space of the production plan, a higher workpiece density on the workpiece blank and thus a particularly resource-saving additional production can be achieved.
[0028] In a preferred embodiment of the computer-assisted manufacturing method, the planned workpieces to be manufactured are rearranged so that the workpieces to be manufactured in addition are arranged on the workpiece blank. In other words, the order control performs a planning optimization of the manufacturing process taking into account the workpieces to be manufactured in addition. For the rearrangement of the workpieces to be manufactured, the planning optimization can be performed, for example, with reduced spacing and / or by space-saving arrangement of the workpieces on the workpiece blank.
[0029] Furthermore, the following extension of the computer-assisted manufacturing method is preferred, in which, in order to arrange the workpiece to be additionally manufactured on the workpiece blank, the planned workpiece to be manufactured is arranged on the workpiece blank following the workpiece blank. In other words, it can be provided that the workpiece to be additionally manufactured is prioritized by postponing the subsequent manufacturing order, for example based on the manufacturing end time point. This makes it possible to achieve more urgent additional manufacturing of the workpiece. For example, the manufacturing end time point can be met by prioritizing the workpiece to be additionally manufactured. Preferably, the prioritization of the workpiece to be additionally manufactured is only carried out if this prioritization allows the subsequent workpiece to be manufactured until its manufacturing end time point.
[0030] In a preferred embodiment of the computer-assisted production method, it is provided that the workpiece to be produced in a supplementary manner is produced by the processing device and arranged on a suitable workpiece blank. Preferably, the at least one workpiece that has been produced in a supplementary manner is checked for defect-free production according to the previous description, in particular the description of the method step "identifying defective workpieces". If the workpiece produced in a supplementary manner is again identified as defective, it can be provided that the above method is carried out again. In addition, an operator can be informed so that a detailed defect search can be carried out.
[0031] In a preferred embodiment of the computer-assisted production method, the machine tool is designed as a laser cutting machine. The inventors have found that the production method is particularly advantageous when used in combination with a laser cutting machine.
[0032] The basic object is also achieved by a manufacturing system.
[0033] The manufacturing system comprises at least one processing device and an order control device. Preferably, the manufacturing system comprises a plurality of processing devices. Typically, each of these processing devices is assigned to a machine tool. The order control device can be designed to be included by one or more machine tools. Preferably, the order control device is designed as a separate unit of the manufacturing system. In each case, the order control device is configured to communicate with at least one processing device, in particular all processing devices.
[0034] The manufacturing system is configured to perform the manufacturing methods described above and below.
[0035] Further features and advantages of the present invention can be found in the description, the claims and the drawings. According to the present invention, the above-mentioned features and the features to be further described can be used individually or in any suitable combination in the case of a plurality of features. The embodiments shown and described should not be understood as exhaustive, but should be understood as having exemplary properties for describing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] Figure 1 A schematic diagram showing a manufacturing method for manufacturing a workpiece according to the present invention;
[0037] Figure 2 shows the method for executing Figure 1 Schematic diagram of a manufacturing system having a processing device and an order control device according to an exemplary embodiment of the manufacturing method of the present invention. DETAILED DESCRIPTION
[0038] Figure 1 A schematic diagram of a computer-assisted manufacturing method 10 according to the invention is shown.
[0039] The manufacturing method 10 is designed to be used by having a processing device 20 (see Figure 2 ) of machine tool 18 (see Figure 2 ), especially flat bed machine tools according to manufacturing plan 16 (see Figure 2 ) by the workpiece blank 14 (see Figure 2 ) manufacturing (multiple) workpieces 12 (see Figure 2 ).
[0040] The manufacturing method 10 comprises the following method steps:
[0041] a) producing 22 at least one workpiece 12 by means of a machine tool 18;
[0042] b) identifying 24 defective workpieces 26;
[0043] c) reading 28 manufacturing information about the identified defective workpiece 26 by the order control device 30;
[0044] d) determining 32 the planned manufacturing process 36 (see Figure 2 ) for supplementing the defective workpiece 26 with a workpiece blank 34 (see Figure 2 );
[0045] e) The order control device 30 arranges 38 the workpiece 40 to be subsequently produced on the suitable workpiece blank 34 .
[0046] In a subsequent method step, the workpiece 38 to be produced additionally can be produced by the processing device 20 .
[0047] Figure 2 A schematic diagram of a manufacturing system 42 is shown.
[0048] The manufacturing system 42 comprises a processing device 20 and an order control device 30. The processing device 20 is a component of a machine tool 18, which is designed to produce workpieces 12 from workpiece blanks 14 according to a manufacturing plan 16. For the sake of clarity, only two workpieces 12 are provided with reference numerals. According to the embodiment shown, the order control device 24 is designed as a separate unit and is configured to communicate with the processing device 20.
[0049] In a specific embodiment, it may be provided that the production system 42 has at least two, in particular a plurality of machine tools 18 , which each have a processing device 20 .
[0050] In the following, the manufacturing method 10 is described in more detail based on the manufacturing system 42 shown (see Figure 1 ).
[0051] According to method step 22 (see Figure 1 ) "manufacture at least one workpiece", according to the manufacturing plan 16, at least one workpiece 12 is manufactured by the processing device 20 of the machine tool 18. The manufacturing plan 16 is usually transmitted to the processing device 20 by the order control device 30 before the manufacturing 22. As shown, a plurality of workpieces 12 have been manufactured by the processing device 20 and exist as manufactured workpieces 44.
[0052] In addition, according to Figure 2 , a plurality of the workpieces 12 to be manufactured exist as unmanufactured workpieces 46. In other words, Figure 2 The illustration in shows a current state during the production of the workpiece 12 .
[0053] According to the further method step 24 (see Figure 1 ) "Identification of defective workpieces", identification of defective workpieces 26 that are damaged and / or incorrectly manufactured by the processing device 20. As shown, the identification or recognition of the defective workpiece 26 can be carried out during the production 22 of the workpiece 12. In particular, it can be provided that during the production 22 of the defective workpiece 26, the defective workpiece 26 is already identified as defective.
[0054] For identification purposes, the production system 42, in particular the machine tool 18 and / or the order control device 30, can have a control device (not shown in detail), which, for example, detects irregularities during the production 22 of the workpiece 12 on the processing device 20 and / or compares the produced workpiece 44 with a target state that can be derived from the production plan 16 by an optical evaluation device. In other words, such a defective workpiece 26 can be assigned to the workpiece 12 actually to be produced in the production plan 16 and can be ascertained as defective via deviations.
[0055] The information about the defective workpiece 26 and / or about the workpiece 12 actually to be produced can be reported to the order control device 30 , preferably to a comparison unit 50 of the order control device 30 .
[0056] In a further method step 28 (see Figure 1 ) "Read manufacturing information", the order control device 30, preferably the comparison unit 50 reads out the manufacturing information about the defective workpiece 26 or about the workpiece 12 actually to be manufactured. Usually, as shown, the order control device 30 reads the manufacturing information from the manufacturing plan 16.
[0057] According to the further method step 30 (see Figure 1 ) “Determine a suitable workpiece blank”, the order control device 30 determines a workpiece blank 34 that is suitable for completing the production of the defective workpiece 26 in the planned production process.
[0058] For this purpose, it can be provided that the order control device 30, in particular the illustrated comparison unit 50, derives the blank requirements from the read-in manufacturing information about the workpiece 40 to be additionally manufactured. Typically, a suitable workpiece blank 34 must have, for example, the same material and the same blank thickness as the (original) workpiece blank 14 actually provided for manufacturing the defective workpiece 26.
[0059] The manufacturing process can have one, or as shown two, further manufacturing plans 16a, 16b. The manufacturing plans 16a, 16b are provided, for example, for manufacturing workpieces 12a, 12b from workpiece blanks 14a, 14b after the manufacturing plan 16 has been completed by the machining device 20. The manufacturing plans 16a, 16b are preferably managed by the order control device 30. In other words, the manufacturing plans 16a, 16b can be changed by the order control device 30, in particular by the comparison unit 50.
[0060] In the example shown, both the manufacturing plan 16a and the manufacturing plan 16b of the manufacturing process 36 have a free space 52. According to this example, the size of the free space 52 is sufficient to either supplement the defective workpiece 26 with the workpiece blank 14a according to the manufacturing plan 16a or supplement the defective workpiece with the workpiece blank 14b according to the manufacturing plan 16b. In other words, the blank requirement related to the size of the free space 50 required for supplementary manufacturing of the defective workpiece 26 can be met.
[0061] The workpiece blank 14a may have, for example, a blank thickness that is smaller or larger than the blank thickness of the workpiece blank 14. Alternatively or additionally, the workpiece blank 14a may have a different blank material than the original workpiece blank 14. In other words, the blank requirements relating to blank thickness and / or blank material may not be met.
[0062] In this case, the order control device 30 can be configured to compare the blank requirements with the next workpiece blank 14 b in the manufacturing process. For example, the workpiece blank 14 b can meet all blank requirements. Then, the order control device 30 determines the workpiece blank 14 b as a suitable workpiece blank 34.
[0063] According to the further method step 38 (see Figure 1 ) "arrange the workpiece to be supplemented on the workpiece blank", and arrange the workpiece 12 to be supplemented on the workpiece blank 14b. In other words, the manufacturing plan 16b is changed by the order control device 30 so that the manufacturing plan includes the supplementary manufacturing of the defective workpiece 26 and the manufacturing of the workpiece 12b.
[0064] Reference numerals list
[0065] Manufacturing method 10;
[0066] Workpieces 12, 12a, 12b;
[0067] Workpiece blanks 14, 14a, 14b;
[0068] Manufacturing plans 16, 16a, 16b;
[0069] Machine tools 18;
[0070] Processing device 20;
[0071] Method step 22, “manufacturing workpiece”
[0072] Method step 24, “identifying defective workpieces”;
[0073] Defective workpiece 26;
[0074] Method step 28, "read manufacturing information";
[0075] Order control device 30;
[0076] Method step 32, "determine a suitable workpiece blank";
[0077] Suitable workpiece blank 34;
[0078] Manufacturing process 36;
[0079] Method step 38, "arranging the workpiece to be additionally manufactured on a suitable workpiece blank";
[0080] Workpiece 40 to be manufactured;
[0081] Manufacturing systems 42;
[0082] manufactured workpiece 44;
[0083] Unmanufactured workpiece 46;
[0084] Comparison unit 50;
[0085] Free space 52.
Claims
1. A computer-assisted manufacturing method (10) for manufacturing a workpiece (12, 12a, 12b) from a workpiece blank (14, 14a, 14b) according to a manufacturing plan (16, 16a, 16b) by means of a machine tool (18) having a machining device (20), the machine tool being in particular a flat-bed machine tool, and the computer-assisted manufacturing method comprising the following method steps: a) manufacturing (22) at least one workpiece (12, 12a, 12b) by means of the machine tool (18); b) identifying (24) defective workpieces (26); c) reading (28) manufacturing information about the identified defective workpiece (26) by an order control device (30); d) determining (32) a workpiece blank (34) suitable for additionally manufacturing the defective workpiece (26) in a planned manufacturing process (36) based on the manufacturing information read by the order control device (30); e) The order control device (30) arranges (38) the workpiece (40) to be subsequently manufactured on the suitable workpiece blank (34).
2. The computer-supported manufacturing method (10) according to claim 1, wherein: The manufacturing information includes a manufacturing end time of the workpiece (40) to be supplementarily manufactured, wherein if in the manufacturing process (36) the processing device (20) processes the workpiece blank (14, 14a, 14b) before the manufacturing end time, the workpiece blank (14, 14a, 14b) is determined to be suitable.
3. The computer-supported manufacturing method (10) according to claim 1 or 2, wherein: The manufacturing information includes workpiece dimensions, wherein a workpiece blank (14, 14a, 14b) is determined to be suitable if the workpiece (40) to be additionally manufactured can be arranged on the workpiece blank (14, 14a, 14b), in particular can be arranged in a free space (52) between the planned workpieces (12, 12a, 12b) to be manufactured.
4. The computer-supported manufacturing method (10) according to claim 3, wherein: The planned workpieces (12, 12a, 12b) to be manufactured are rearranged so that the workpiece (40) to be manufactured additionally is arranged on the workpiece blank (14, 14a, 14b).
5. The computer-supported manufacturing method (10) according to claim 4, wherein: The workpiece (12, 12a, 12b) to be manufactured is arranged on a workpiece blank (14, 14a, 14b) following the workpiece blank (14, 14a, 14b) so that the workpiece (40) to be manufactured additionally is arranged on the workpiece blank (14, 14a, 14b).
6. The computer-assisted manufacturing method (10) according to any one of the preceding claims, wherein: The workpiece (40) to be subsequently produced, which is arranged on the suitable workpiece blank (34), is produced by the processing device (20).
7. The computer-assisted manufacturing method (10) according to any one of the preceding claims, wherein: The machine tool (18) is designed as a laser cutting machine.
8. A manufacturing system (42) comprising at least one processing device (20) and an order control device (30), the order control device being configured to perform the manufacturing method (10) according to any one of the preceding claims.