WO2014045383A1 - Procédé de détermination d'étape d'usinage et dispositif de conception d'étape d'usinage - Google Patents

Procédé de détermination d'étape d'usinage et dispositif de conception d'étape d'usinage Download PDF

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Publication number
WO2014045383A1
WO2014045383A1 PCT/JP2012/074166 JP2012074166W WO2014045383A1 WO 2014045383 A1 WO2014045383 A1 WO 2014045383A1 JP 2012074166 W JP2012074166 W JP 2012074166W WO 2014045383 A1 WO2014045383 A1 WO 2014045383A1
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Prior art keywords
machining
surface accuracy
processing
unit
data
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PCT/JP2012/074166
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English (en)
Japanese (ja)
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大輔 堤
麗子 井上
洋一 野中
隆宏 中野
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株式会社日立製作所
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Priority to PCT/JP2012/074166 priority Critical patent/WO2014045383A1/fr
Priority to JP2014536485A priority patent/JP5890907B2/ja
Publication of WO2014045383A1 publication Critical patent/WO2014045383A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/4093—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Definitions

  • the present invention relates to a method for determining a machining process composed of a plurality of processes and a machining process design apparatus suitable for a CAM (computer-aided machining) system.
  • the CAM is used to prepare the actual machining for the CAD model of the product to be produced.
  • the NC data created by CAM is transferred to the NC machine and actual machining is performed.
  • Patent Document 1 As background art in this technical field.
  • the processing surface is classified for each inclination angle of the finished surface of the workpiece, and the maximum remaining amount of cutting by the tool used for each classified surface is calculated, When the calculated maximum remaining amount of machining exceeds the allowable value, a re-machining position is set for that portion ”(see summary).
  • Patent Document 2 This gazette states, “Select process candidates from the plurality of process candidates in descending order of machining capability, find the maximum machining area that can be machined by the process candidates from the shape before machining and the shape after machining. The difference between the machining area and the shape after machining is obtained, and selection of process candidates is repeated until the difference falls below an allowable value. The selected process candidates are arranged, and the last selected process candidate is the final process. For each process order candidate, the effective machining time is obtained from the machining capacity, machining amount and load time of each process, and the total effective machining time of each process is summed to obtain the total effective machining time. The process sequence candidate that has the shortest effective machining time is determined as the machining process ".
  • Patent Document 3 “To read the three-dimensional material shape data M3 and the three-dimensional product shape data M1 from the three-dimensional CAD device H1 and generate the three-dimensional product shape data M1 from the three-dimensional material shape data M3 through a plurality of steps.
  • the machining knowledge database D1 storing the finishing cost 46 and threshold values necessary for determining the machining conditions
  • the process candidate database D2 storing various tool information
  • the three-dimensional product shape data The finishing allowance 46 is built up in M1, and the three-dimensional shape data M2 is created.
  • the process design module E1 to be determined is provided.
  • the machining process design method described in Patent Document 1 does not consider a machining process composed of a plurality of processes, and the scallop height (the scallop height is used as an index of surface accuracy) for uncut parts.
  • an uncut portion is formed between adjacent tool paths of the processing tool, but is defined as the maximum height measured in the direction perpendicular to the final finished surface that is the product shape.
  • the scallop height is measured in the direction perpendicular to the slope.
  • the final surface accuracy is uniquely defined as a finishing allowance, and the necessity of the previous process of a specific feature such as drilling is made into a database without considering the surface accuracy before the finishing process.
  • the processing knowledge described in Patent Document 3 the final surface accuracy is uniquely defined as a finishing allowance, and the necessity of the previous process of a specific feature such as drilling is made into a database without considering the surface accuracy before the finishing process.
  • an object of the present invention is to provide a method for determining a process order of a plurality of processes based on surface accuracy of each process in three-dimensional shape processing.
  • An object of the present invention is to provide a method for determining a combination of processes having high accuracy and high efficiency with respect to a trade-off between accuracy and efficiency (productivity) and determining the order thereof.
  • a method for determining a machining process consisting of a plurality of processes for processing a shape of a material into a design shape, at least a processing machine, a tool, a processing specification, and a processing method
  • process region model from the product CAD model and material CAD model
  • the process area model is selected from the process candidate data table, and an initial process candidate capable of machining with high machining efficiency is selected from the process candidate data table, and tool path data for machining the machining area model with the selected process candidate is created.
  • the surface accuracy after machining is calculated using the tool path data and the geometric element data of the tool and the work material, and the surface accuracy after machining is the final required surface accuracy. If it is not satisfied, if not satisfied, a process candidate having a required surface accuracy before processing that satisfies the surface accuracy after processing is selected as a next process from the process candidate data table, and the processing is performed by the next process.
  • the process of determining whether or not the surface accuracy after processing satisfies the final required surface accuracy is repeated by a simulation of processing the uncut region of the region model.
  • a process name, a processing machine, a tool, a processing specification, a processing method a storage unit that stores a process candidate storage table having data items of required surface accuracy before processing, A calculation unit, an input unit, an output unit, and a communication unit, wherein the calculation unit extracts a region to be removed by cutting from a difference between a material shape and a final shape, and the storage unit
  • the machining process design unit that determines the combination and order of processes from the process candidate data stored in the table and creates a machining process design plan, product CAD model data, material CAD model data, machining area model data, and process candidate data
  • a post-machining surface accuracy calculation unit that calculates post-machining surface accuracy from the geometric elements of the tool and the work material for each process, Compare the rear surface accuracy with the final required surface accuracy, which is a design requirement, determine whether the surface accuracy after processing satisfies the final required
  • the processing time is reduced by determining a process combination having a short total processing time based on the surface accuracy of the surface to be cut.
  • the number of preparation steps can be reduced by automating process design through process combination search.
  • safety is improved by taking into consideration machining defects by considering surface accuracy between processes.
  • FIG. 1 is a configuration diagram of a machining process design apparatus that implements a machining process design method according to an embodiment of the present invention.
  • (A) to (c) are drawings for explaining the relationship among required surface accuracy before processing, surface accuracy after processing, and final required surface accuracy to be considered in process design focusing on processing efficiency and surface accuracy.
  • It is an example of a process candidate storage table configuration according to an embodiment of the present invention.
  • It is a figure which shows the structural example of a processing machine data table.
  • Figures 2 (a), (b) and (c) show graphs with the horizontal axis representing machining efficiency and the vertical axis representing surface accuracy.
  • items to be considered in the process design will be described using this graph.
  • FIG. 2 (a) in a rough process with high machining efficiency (the foremost machining process set with the highest machining efficiency when machining the workpiece surface in a plurality of processes) 201, surface accuracy after machining is shown. Is rougher than the final surface accuracy (final required surface accuracy) required in the design, and an additional process is required.
  • a finishing process final processing step set with an emphasis on surface accuracy so as to satisfy the final required surface accuracy when the surface to be processed is processed in multiple steps
  • the required surface accuracy before processing is the surface accuracy before processing of the surface to be cut required for carrying out a certain process. For example, if the finishing process is performed with a rough surface, the finishing tool will be lost. This is a condition that is set in consideration of such a situation.
  • FIG. 2 (a) shows that the post-machining surface accuracy, which is the result of machining by the large roughing process 201, does not satisfy the pre-machining required surface accuracy of the finishing step 203. For this reason, FIG. As shown in b), between the large roughing step 201 and the finishing step 203, the intermediate roughing step (the surface accuracy of the uncut surface by the large roughing step satisfies the required surface accuracy before processing, and the required surface accuracy before finishing in the finishing step.
  • the process design plan is completed by adding a processing step 202 that can be processed with finer surface accuracy.
  • the present invention provides a method for designing a machining process by paying attention to, for example, post-machining surface accuracy and pre-machining required surface accuracy.
  • FIG. 1 shows a configuration diagram of a machining process design apparatus 100 that implements a machining process design method according to an embodiment of the present invention.
  • the machining process design apparatus 100 includes a calculation unit 101, a storage unit 102, an input unit 103, an output unit 104, and a communication unit 105.
  • the machining process design apparatus 100 is connected to a three-dimensional CAM 130, an NC machine tool 140, a three-dimensional CAD 150, and an NC simulator 160 via a communication unit 105 and a network 170.
  • the machining process design apparatus 100 may be configured as one function of the three-dimensional CAM 130 in the same apparatus.
  • the input unit 103 and the output unit 104 are not held as independent components in the machining process design device 100, and for example, an input / output device held by the NC machine tool 140 may be used.
  • the input unit 103 is, for example, a keyboard or a mouse
  • the output unit 104 is, for example, a display or a printer
  • the arithmetic unit 101 is, for example, a processor such as a CPU
  • the storage unit 220 is, for example, an HDD or a semiconductor memory.
  • the input unit 103 receives input of user instructions, and the output unit 104 displays and prints the processing results of the computer system.
  • the 3D CAD 150 creates the material shape (material CAD model) and final shape (product CAD model) of the product to be processed as 3D shape data.
  • material shape material CAD model
  • product CAD model final shape of the product to be processed as 3D shape data.
  • an intermediate shape for processing may be created as the three-dimensional data.
  • the 3D CAM 130 determines a machining area, sets machining conditions, selects a tool, and creates a machining path for the 3D shape data created by the 3D CAD 150 or the 3D shape data input from the outside.
  • An NC program is created from the created machining path.
  • the processing up to the creation of the machining path can be performed by exchanging data between the three-dimensional CAM 130, the calculation unit 101 of the machining process design apparatus 100, and the storage unit 102.
  • data exchange with the NC simulator 160 may be added to the processing.
  • the NC simulator 160 loads the NC program created by the three-dimensional CAM 130 or the NC program stored in the storage unit 102 of the machining process design device 100, executes a machining simulation, and answers the result.
  • the calculation unit 101 executes a program stored in the storage unit 102 and the like, thereby processing region calculation unit 110, processing step design unit 111, post-processing surface accuracy calculation unit 112, surface accuracy comparison processing unit 113, processing It functions as a time calculation unit 114 and a machining process surface accuracy check unit 115.
  • the machining area calculation unit 110 extracts an area to be removed by cutting from the difference between the material shape and the final shape.
  • the material shape and the final shape may be replaced with an intermediate shape for processing.
  • the machining process design unit 111 determines a combination and order of processes from the process candidate data held in the storage unit 102, and creates a process design plan. The processing is performed based on the processing results in the post-processing surface accuracy calculation unit 112, the surface accuracy comparison processing unit 113, and the processing time calculation unit 114. Details of the processing of the machining process design unit will be described later with reference to the flowcharts of FIGS.
  • the post-machining surface accuracy calculation unit 112 uses the tool path data created by the three-dimensional CAM in accordance with the product CAD model data, the material CAD model data, the machining area model data, and the process candidate data, and uses a tool and a work material for each process.
  • the surface accuracy after processing is calculated from the geometric elements.
  • the geometric element includes at least the tool cutting edge R, the shaft cut Ap, and the inclination angle ⁇ between the tool and the work material.
  • the post-machining surface accuracy calculation unit 112 can request the NC simulator 160 to execute a machining simulation, and calculate post-machining surface accuracy based on the result.
  • the post-process surface accuracy calculation unit 112 calculates at least the scallop height as an index of the post-process surface accuracy. As shown in Fig.
  • the scallop height is defined as the maximum height measured in the direction perpendicular to the final finished surface, which is the product shape, although there is an uncut portion between adjacent tool paths of the machining tool.
  • surface roughness Ra: centerline average roughness, Rmax: maximum height, Rz: ten-point average roughness, etc.
  • JIS ten-point average roughness
  • the surface accuracy comparison processing unit 113 compares the post-processing surface accuracy calculated by the post-processing surface accuracy calculation unit 112 with the final required surface accuracy that is a design requirement, and whether the post-processing surface accuracy satisfies the final required surface accuracy. Determine. Further, the processed surface accuracy calculated by the processed surface accuracy calculation unit 112 is compared with the required surface accuracy before processing stored in the storage unit 102, and process candidates that satisfy the required surface accuracy before processing are selected.
  • the machining time calculation unit 114 calculates the machining time for the process design plan created by the machining process design unit 111.
  • the machining time can be calculated from the length of the machining path created by the three-dimensional CAM 130 and the feed speed, for example. Further, by using the NC simulator 160, it is possible to calculate a machining time considering the maximum speed, acceleration / deceleration, tool change time, etc. of each axis of the machine tool.
  • the storage unit 102 includes a process candidate data storage area 120, a processing machine data storage area 121, a product CAD model storage area 122, a material CAD model storage area 123, a machining area model storage area 124, and an NC program storage. An area 125 and a machining process design plan storage area 126 are included.
  • the data in each storage area may be shared with the data in the storage unit of the three-dimensional CAM 130. In that case, the data may be stored in the storage unit of the three-dimensional CAM 130.
  • the process candidate data storage area 120 stores a process candidate storage table 301 shown in FIG.
  • the process candidate storage table 301 has, for example, a process name 311, a processing machine 312, a tool 313, a processing specification 314, a processing method 315, and a required surface accuracy 316 before processing as table components.
  • the required surface accuracy after processing including the one calculated by the post-processing surface accuracy calculation unit 112 such as the scallop height
  • the tool entry / exit method engage, retract
  • a setting item included in a typical CAM may be included as a component.
  • Each data record specified by the process name 311 is data representing one process candidate, and is registered in advance as a process candidate assumed in the table.
  • the processing machine 312 holds a name and identification ID that specify a processing machine on which the process candidate specified by the process name 311 is implemented.
  • the tool 313 holds, for example, information such as a tool material type (carbide, high speed, ceramic, etc.), a tool shape type (bull nose, ball end, total shape, etc.), a tool diameter, a tool edge R, and the number of teeth. Even with the same tool, a plurality of process plans with different processing specifications and processing methods may be held as candidates.
  • the machining specification 314 holds information such as a cutting speed V (m / min) and a single blade feed fz (mm / blade). You may hold
  • the material type of the target work material may be added as a table constituent element, and the machining specifications may be held for each material type.
  • the machining method 315 includes, for example, a machining method based on the operation of the tool (contour line machining, part-dependent machining, trochoidal machining, etc.), a contact amount between the tool and the work material (axial cutting amount (ap), diameter cutting amount (ae). Etc.) is retained.
  • the contact amount between the tool and the work material may not be defined, and for example, the post-machined surface accuracy such as the scallop height may be set as a condition, and the cutting depth of the tool that satisfies the setting condition may be set by the three-dimensional CAM 130.
  • the required surface accuracy 316 before processing is the surface accuracy before processing of the surface to be cut that is required for carrying out a certain process.
  • the surface roughness (Ra: centerline average roughness, Rmax: maximum height, Rz: ten-point average roughness, etc.) described in JIS may be used.
  • process candidate tool for example, a tool that is resistant to initial cracks, a roughing tool with a significantly high cutting depth, etc.
  • processing specifications such as low specifications that presuppose machining of parts with poor surface accuracy
  • the required surface accuracy before processing of the process candidate data storage area is a feature of the present invention.
  • the processing machine data storage area 121 stores device information of all the processing machines in the machining shop.
  • a processing machine data table 401 as shown in FIG. 4 is stored.
  • a processing machine data table 401 includes a processing machine number column 411 that is identification information for specifying a processing machine, a processing machine column 412 for storing information for specifying the processing machine name of the processing machine, and the axis of the processing machine.
  • An axis configuration column 413 for storing information for specifying the configuration
  • a stroke column 414 for storing information for specifying the stroke of each axis of the processing machine
  • a setup time column 415 for storing an average time for changing the processing machine
  • the product CAD model storage area 122 receives and stores product CAD model data representing the final machining shape for each product created by the three-dimensional CAD device 150 via the network 170 and the communication unit 105.
  • Product CAD model data is stored in, for example, the DXF file format.
  • the face model is defined in the element definition section (ENTITIES) as each graphic element constituting the drawing, and the solid model is stored in the block definition section (BLOCKS). It is defined as a block graphic element.
  • the CAD file format is not particularly limited.
  • final required surface accuracy data is added to the product CAD model as the surface accuracy of the shape of the product. As this data, there are a case where data created by the three-dimensional CAD device 150 is adopted and a case where final required surface accuracy data is added when product CAD model data is registered in the machining process design device 100.
  • the material CAD model storage area 123 stores three-dimensional CAD data representing the material shape of each product. Stores data in either face model, solid model, or both formats.
  • the three-dimensional CAD data created in the three-dimensional CAD device 150 is received via the communication unit and stored.
  • the file format of the material CAD model storage area 123 is also stored in the same file format as that of the product CAD model storage area 122 described above.
  • the machining area model storage area 124 stores a machining area model created by the machining area calculation unit 110 by extracting a machining area to be removed by cutting from the difference between the material CAD model and the product CAD model. Alternatively, the machining area model data created by the three-dimensional CAM 130 is received and stored. The file format of the machining area model storage area is also stored in the same file format as that of the product CAD model storage area 122 described above.
  • an NC program created by the three-dimensional CAM 130 and input to the NC machine tool 140 is held in association with the process design plan.
  • the machining process design plan storage area 126 stores the process design plan data created by the machining process design unit 111.
  • the process design plan data includes a process order number field 911, a process name field 912 for specifying a process name, a tool field 913 for storing information on a tool to be used, Machining specification column 914 for storing information of machining parameters to be used, pre-processing required surface accuracy column 915 for reading and recording the pre-processing required surface accuracy from the process candidate storage table 301, and processing calculated by the post-processing surface accuracy calculation unit 112. Record the back accuracy.
  • FIG. 5 is a flowchart showing an outline of a machining process design method executed by the machining process design unit 111 of the machining process design apparatus 100.
  • step S501 a process designer receives an input designating a process design target product from the input unit 103, and stores product CAD model data, material CAD model data, and machining area model data stored in the storage unit 102. read out.
  • the corresponding data is not registered in the storage unit 102, the data stored in the storage unit of the three-dimensional CAM 130 is read out.
  • the machining area model data is obtained by instructing the input unit 103 or the three-dimensional CAM 130 to create a machining area model, accepting the created machining area model data, and storing the machining area model data in the machining area model storage area 124, for example. is there.
  • the machining area calculated by the machining area calculation unit 110 based on the shape data created by the three-dimensional CAD 150 is stored in the machining area model storage area 124.
  • step S ⁇ b> 502 the machining efficiency is the highest among the process candidates stored in the process candidate data storage area 120 of the storage unit 102 for the product CAD model data, the material CAD model data, and the machining area model data to be designed.
  • a process having a high value is selected as the initial process.
  • step S503 generation of a tool path for processing according to each data of a processing machine, a tool, a processing specification, and a processing method registered in the data record of the process candidate selected in the previous step is generated in the three-dimensional CAM 130.
  • the tool path data generated by the three-dimensional CAM is input via the network 170 and the communication unit 105.
  • step S504 the surface accuracy after processing the processing region model using the process candidate data selected in step S502 or step S507 and the tool path data input in the previous step is processed by the post-processing surface accuracy calculation unit 112. After processing surface accuracy) ⁇ is calculated.
  • step S505 it is determined by the processing of the surface accuracy comparison processing unit 113 whether the post-processing surface accuracy ⁇ calculated in the previous step S504 satisfies the final required surface accuracy (product CAD model) of the product. If the final required surface accuracy is satisfied, the process design is terminated. If the final required surface accuracy is not satisfied, the process proceeds to step S506.
  • step S506 since the next process is necessary, an instruction to correct the tool path of the previous process created in step S503 is sent to the three-dimensional CAM 130 so as to leave a machining allowance for the next process. Enter the toolpath data. If it is determined that the tool path does not need to be corrected, this step is omitted.
  • step S507 process candidates that satisfy the constraint that the required surface accuracy before processing is higher than the post-processing surface accuracy ⁇ calculated in step S504 are selected from the process candidates stored in the process candidate data storage area 120 of the storage unit 102. Then, a process having a high machining efficiency is selected for the remaining machining area cut by the tool path of the previous process from the target machining area model.
  • a process having a high machining efficiency is selected for the remaining machining area cut by the tool path of the previous process from the target machining area model.
  • the selection of the process in step S507 for example, not only a process having the highest processing efficiency but also a method of selecting at random from processes having a higher processing efficiency than the average may be used.
  • the selection of the process in step S507 may use an evaluation index such as a process with high post-processing surface accuracy instead of a process with high processing efficiency.
  • step S507 After the process is selected in step S507, the process returns to step S503, the above process is repeated until the condition of step S505 is satisfied, and the process order is determined.
  • FIG. 5 Machining process design method for dividing machining region based on post-machining surface accuracy
  • FIG. 6 is a flowchart showing a method of dividing the machining area based on the post-machining surface accuracy executed by the machining process design unit 111.
  • the flowchart in FIG. 6 is a flowchart in which new processing is added between steps with respect to the flowchart in FIG. 5. Steps S501 to S507 in FIG. 6 have the same functions as the processes denoted by the same reference numerals shown in FIG.
  • step S601 when the value of the post-machining surface accuracy ⁇ calculated in step S504 has a variation in the machining area, an arbitrary threshold (for example, in the process candidate data storage area 120 of the storage unit 102) is based on the value of ⁇ .
  • the machining area is divided for each range of the required surface accuracy before machining set for the stored process candidates. After the division, the maximum value of ⁇ within the threshold range (that is, the value of the portion having the worst surface accuracy) is stored in the machining region model storage area 124 together with the divided machining regions as ⁇ of the divided machining regions.
  • step S602 one machining region divided in step S601 is selected, and the process proceeds to step S505.
  • step S505 it is determined by the processing of the surface accuracy comparison processing unit 113 whether the post-processing surface accuracy ⁇ calculated in step S504 satisfies the final required surface accuracy of the product. If the final required surface accuracy is not satisfied, the process proceeds to step S506 as in the process of FIG. If the final required surface accuracy is satisfied, the process design of the divided machining area is completed, and the process proceeds to step S603.
  • step S603 it is determined whether the process design process has been completed in all the divided machining areas among the machining areas divided in step S601. If the processing is finished, the process design is finished. If there is a divided processing area that has not been processed, the process proceeds to step S604.
  • step S604 one divided machining area for which process design has not been completed is selected from the machining areas divided in step S601, and the process proceeds to step S505.
  • FIG. 7 is a flowchart showing a method for searching for possible combinations by the machining process design method according to the embodiment of the present invention.
  • step S701 the designer receives an input designating a design target product from the input unit 103, and reads product CAD model data, material CAD model data, and machining area model data stored in the storage unit 102.
  • the data stored in the storage unit of the three-dimensional CAM 130 is read out.
  • the machining area model data is obtained by instructing the input unit 103 or the three-dimensional CAM 130 to create a machining area model, accepting the created machining area model data, and storing the machining area model data in the machining area model storage area 124, for example. is there.
  • the machining area calculated by the machining area calculation unit 110 based on the shape data created by the three-dimensional CAD 150 is stored in the machining area model storage area 124.
  • step S ⁇ b> 702 an initial process is selected from the process candidates stored in the process candidate data storage area 120 of the storage unit 102 for the product CAD model data, the material CAD model data, and the machining area model data to be designed.
  • Select one selectable process is, for example, a process that uses a tool that is resistant to initial fractures that does not have the required surface accuracy before processing, and the processing conditions are set lower than usual so that it can be used as the initial process. Process.
  • step S703 process design is performed using the process selected in step S702 as an initial process.
  • the process design is executed by replacing step S502 with step S712 in FIG. 7 in steps S502 to S507 in the flowchart of FIG.
  • step S502 may be replaced with step S712 of FIG.
  • step S704 the processing time of the process design plan created in step S703 is estimated by the processing of the processing time calculation unit 114.
  • step S705 it is determined whether there is a process that can be selected as an initial process among the process candidates stored in the process candidate data storage area 120 of the storage unit 102. If a process candidate remains, the process returns to step S702, and one of the remaining process candidates is selected, and the process is continued. If no process candidate remains, the process proceeds to step S706.
  • step S706 the process design plan that minimizes the machining time is selected from the process design plans created by the processing up to the previous step.
  • FIG. 9 is a diagram illustrating an example of a CAM setting screen 901 according to an embodiment of the present invention
  • FIG. 10 displays an error in the process order on the machining process list screen of the CAM setting screen according to an embodiment of the present invention.
  • FIG. 11 is a diagram illustrating an example, and FIG. 11 is a diagram illustrating an example in which a method for setting the post-machining surface accuracy on the machining process list screen of the CAM setting screen according to the embodiment of the present invention is changed.
  • the CAM setting screen 901 includes, for example, a model display screen 902, a machining process list screen 903, and the like.
  • the CAM setting screen 901 is a screen for providing a man-machine interface when the process designer performs the process design using the machining process design apparatus 100, and includes an output unit 104 (the machining process design apparatus 100 and the three-dimensional CAM 130. Is mounted on the same device, it is displayed on the output unit of a three-dimensional CAM).
  • the process design device 100 displays the product CAD model, the material CAD model, and the machining area model corresponding to the input designated by the process designer from the input unit 103 as the design target product, or the machining area is displayed on the 3D CAM 130.
  • model display screen 902 having a function of instructing determination and generation of a tool path, receiving the result, and displaying the result on the screen to support the confirmation of the process designer.
  • machining process list screen 903 that displays a machining process design plan created by the machining process design apparatus 100 to a process designer and supports confirmation.
  • the model display screen 902 displays a machining area and a machining path in each process as a two-dimensional or three-dimensional model. For example, the material shape, design shape, intermediate shape, tool movement trajectory, tool axis inclination, and the like are displayed. In order to define a machining area on the product CAD model, the machining area can be selected using a cursor 904 or the like. Further, in conjunction with the machining process list screen 903, the machining area and machining path corresponding to the machining process selected on the machining process list screen 903 may be explicitly shown by highlighting by color change or blinking display.
  • the machining process list screen 903 displays a machining process design plan as a list of machining processes.
  • the components of the machining process list include, for example, a process order 911, a process name 912, a tool 913, a machining specification 914, a required surface accuracy 915 before processing, a post-processing surface accuracy 916, and the like.
  • the machining specification 914 or the like may be omitted.
  • the post-machining surface accuracy 916 is accepted as a setting of the three-dimensional CAM 130 in process design, for example, not a value (calculated surface accuracy after machining) calculated by the post-machining surface accuracy calculation unit 112 of the machining process design device 100 or the like.
  • the input value (required surface accuracy after processing) may be displayed. Further, both the calculated surface accuracy after processing and the required surface accuracy after processing may be displayed.
  • the process designer determines that the machining process design plan displayed on the machining process list screen 903 is acceptable, the process designer instructs the three-dimensional CAM 130 to create an NC program, and the machining process design apparatus 100 is created.
  • the NC program is received and stored in the NC program storage area 125 in association with the machining process design plan.
  • the stored NC program is sent to the NC simulator 160, and the quality can be confirmed by machining simulation.
  • the simulation result is displayed on the model display screen 902.
  • the NC program whose quality has been confirmed is downloaded to the NC machine tool 140 in the machine shop and manufactured.
  • FIG. 10 shows an example of a different form of the machining process list screen 903.
  • a surface accuracy check 1001 for example, a check result such as OK or NG is displayed.
  • the post-process surface accuracy of the process 1011 is 1.8, and the pre-process required surface accuracy of the process 1012 of the next process is set to 1.6. For this reason, the post-process accuracy of the process 1011 does not satisfy the required pre-process accuracy of the process 1012, and a process failure may occur in the process 1012.
  • NG is displayed in the step 1012 and a request for correction of the step 1012 or the process before and after the step 1012 is explicitly indicated. Can be shown.
  • FIG. 11 shows an example of a different form of the machining process list screen 903.
  • the post-machined surface accuracy 1101 that is a component of the machining process list is set so that the post-machined surface accuracy can be set in a plurality of processes instead of each process. For example, it is possible to omit the subsequent steps 1112 and 1113 in the region satisfying the post-processing accuracy 0.05 in Step 1111.
  • a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. .
  • each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit.
  • Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor.
  • Information such as programs, tables, and files that realize each function can be stored in a memory, a hard disk, a recording device such as an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.
  • control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Numerical Control (AREA)

Abstract

L'objet de la présente invention, dans le domaine de l'usinage en 3D, est de proposer un procédé permettant de déterminer l'ordre d'une pluralité d'étapes en fonction de la précision de surface de chaque étape. La présente invention concerne un procédé permettant de déterminer des étapes d'usinage permettant d'usiner la forme d'un matériau en une forme conçue, le procédé comprenant une pluralité d'étapes, le procédé étant caractérisé en ce que la combinaison et l'ordre des étapes d'usinage consistant en une pluralité d'étapes sont déterminés par ce qui suit : en tant qu'articles d'entrée pour la conception de l'étape d'usinage, la précision de surface après l'usinage à chaque étape et la précision de surface (précision de surface requise avant l'usinage) de surfaces à découper avant l'usinage sont définies ; la précision de surface après usinage est calculée à partir des éléments géométriques d'outils et du matériau à découper à chaque étape ; il est déterminé si la précision de surface après usinage correspond à la précision de surface requise finale, et si elle ne correspond pas, l'étape suivante est sélectionnée parmi des étapes candidates qui correspondent la précision de surface requise avant usinage.
PCT/JP2012/074166 2012-09-21 2012-09-21 Procédé de détermination d'étape d'usinage et dispositif de conception d'étape d'usinage WO2014045383A1 (fr)

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JP2018010581A (ja) * 2016-07-15 2018-01-18 株式会社日立製作所 製造装置、製造システム、及び製造方法
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CN110888396A (zh) * 2018-09-07 2020-03-17 发那科株式会社 数值控制装置
CN110888396B (zh) * 2018-09-07 2024-03-05 发那科株式会社 数值控制装置
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WO2020085451A1 (fr) * 2018-10-26 2020-04-30 シチズン時計株式会社 Machine-outil et dispositif de commande
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WO2021029036A1 (fr) * 2019-08-14 2021-02-18 駿河精機株式会社 Dispositif d'apprentissage automatique, système de traitement de données et procédé d'apprentissage automatique
WO2021029037A1 (fr) * 2019-08-14 2021-02-18 駿河精機株式会社 Dispositif d'apprentissage automatique, système de traitement de données et procédé d'apprentissage automatique
WO2021029038A1 (fr) * 2019-08-14 2021-02-18 駿河精機株式会社 Système de traitement de données
JP2021039657A (ja) * 2019-09-05 2021-03-11 キタムラ機械株式会社 Ｃａｄデータによるマシニングセンタの自動運転装置
WO2021044641A1 (fr) * 2019-09-05 2021-03-11 キタムラ機械株式会社 Dispositif de commande automatique d'un centre d'usinage à l'aide de données de cao
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JP7397767B2 (ja) 2020-06-29 2023-12-13 株式会社日立製作所 製造工程設計システム、製造工程設計方法、及び製造工程設計プログラム
CN113626948A (zh) * 2021-08-06 2021-11-09 金航数码科技有限责任公司 一种基于知识推理的自动工步设计方法
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CN115945743A (zh) * 2022-12-23 2023-04-11 深圳市台钲精密机械有限公司 一种对非标零件试加工的方法及系统
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