WO2017145912A1 - Dispositif de réglage de paramètre de commande numérique et procédé de réglage de paramètre de commande numérique - Google Patents

Dispositif de réglage de paramètre de commande numérique et procédé de réglage de paramètre de commande numérique Download PDF

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Publication number
WO2017145912A1
WO2017145912A1 PCT/JP2017/005765 JP2017005765W WO2017145912A1 WO 2017145912 A1 WO2017145912 A1 WO 2017145912A1 JP 2017005765 W JP2017005765 W JP 2017005765W WO 2017145912 A1 WO2017145912 A1 WO 2017145912A1
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Prior art keywords
numerical control
control parameter
program
control program
parameter
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PCT/JP2017/005765
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English (en)
Japanese (ja)
Inventor
健太 ▲濱▼田
宮田　亮
佐藤　達志
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三菱電機株式会社
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Priority to JP2017529408A priority Critical patent/JP6189007B1/ja
Publication of WO2017145912A1 publication Critical patent/WO2017145912A1/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
    • G05B19/406—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 monitoring or safety
    • G05B19/4069—Simulating machining process on screen

Definitions

  • the present invention relates to a numerical control parameter adjusting device and a numerical control parameter adjusting method for adjusting a numerical control parameter of a numerical control device.
  • machining of a workpiece by a numerically controlled machine tool is often performed through the following steps.
  • the numerical control device reads and analyzes the numerical control program to generate a movement path for the tool and the workpiece.
  • the numerical controller uses the numerical control parameters set in the numerical controller, the numerical controller generates interpolation point data obtained by interpolating the movement paths of the tool and the workpiece for each control cycle.
  • the interpolation point data generated by the numerical control device is commanded to each axis of the numerically controlled machine tool, thereby moving the tool and the workpiece to perform processing. Therefore, the numerical control program and the numerical control parameter greatly affect the machining shape.
  • the operator performs a plurality of trial machining operations using a numerically controlled machine tool, and adjusts a numerical control program and numerical control parameters.
  • this adjustment method requires time corresponding to the number of trial machining operations. Moreover, since the numerically controlled machine tool cannot be used for production during the adjustment, the production efficiency is lowered.
  • a machining simulation technique is used for adjusting the numerical control program and the numerical control parameter. If a problem is found in the machining shape estimated by the machining simulation, the operator corrects the numerical control program and the numerical control parameters, and estimates the machining shape again by the machining simulation. This process is repeated until the problem is resolved.
  • the adjustment method using the machining simulation can shorten the adjustment time, although it depends on the calculation conditions including the performance of the processor, as compared with the adjustment after the trial machining.
  • a numerically controlled machine tool can be used for production during adjustment using machining simulation, and a reduction in production efficiency can be avoided.
  • Patent Document 1 discloses an invention aimed at efficiently adjusting numerical control parameters.
  • Patent Document 1 discloses a numerical control device having a function of performing simulation for each of a plurality of set numerical control parameters and predicting an error of a locus of a numerically controlled machine tool and a machining time. Since the combinations of numerical control parameters to be simulated are narrowed down, the combination of numerical control parameters can be efficiently adjusted so as to satisfy an allowable error and achieve a minimum machining time.
  • the present invention has been made in view of the above, and can provide a numerical control parameter adjustment device that can confirm the influence on the machining shape by changing the numerical control parameters in a short time and can perform the adjustment work efficiently. With the goal.
  • the present invention is a numerical control parameter adjusting device that adjusts numerical control parameters based on a cutting deformation result of a three-dimensional model of an object to be processed.
  • a numerical control program that shows the movement path of the object, a numerical control parameter that represents cutting conditions that contribute to machining accuracy and machining time, a movement path that has undergone interpolation and acceleration / deceleration processing, and a machining target based on the tool model Means for cutting and deforming a three-dimensional model of an object, and numerical control program dividing means for dividing the numerical control program into one or more divided programs for each block in which all axes of the numerically controlled machine tool are stopped among the numerical control programs;
  • a processing object partial area specifying means for specifying a partial area representing a partial area of the three-dimensional model of the processing object, and the specified partial area Means for extracting a division program through which the component model passes, numerical control parameter setting means for setting numerical control parameters for the extracted division program, and instructions for changing
  • the present invention it is possible to confirm the influence on the machining shape due to the change of the numerical control parameter in a short time, and it is possible to obtain a numerical control parameter adjusting device that can perform the adjustment work efficiently.
  • FIG. The flowchart which shows operation
  • Diagram showing the image of interpolation and acceleration / deceleration performed in the numerical control simulation unit The figure which shows the image of the change of the tool tip position by considering the drive characteristic of the numerical control machine tool in the drive control simulation part.
  • the figure which shows the example of the processing shape estimation performed in the processing simulation part The figure which shows the image of the calculation of the shape error performed in the shape error calculation part
  • FIG. 9 is a flowchart showing a numerical control parameter adjustment method using the numerical control parameter adjustment device according to the fourth embodiment.
  • FIG. 6 The figure which shows operation
  • FIG. 1 is a diagram showing a configuration of a numerical control parameter adjustment device according to Embodiment 1 of the present invention.
  • 1 includes a numerical control program analysis unit 101, a movement path range output unit 102, a numerical control simulation unit 103, a drive control simulation unit 104, a machining simulation unit 105, and a shape error calculation.
  • the numerical control program analysis unit 101 reads and analyzes the numerical control program 121 to generate a movement path for the tool and the workpiece.
  • the numerical control program 121 is a program for instructing a machining path of a workpiece. Examples of the numerical control program 121 include a program output from a CAM (Computer Aided Manufacturing) and a program input from a numerical control machine tool user.
  • CAM Computer Aided Manufacturing
  • the movement path range output unit 102 outputs the movement paths of the tool and the processing target generated by the numerical control program analysis unit 101 by the range specified by the numerical control simulation execution range 122. As the initial value of the numerical control simulation execution range 122, all moving route ranges are designated.
  • the numerical control simulation unit 103 interpolates and accelerates / decelerates the movement route for each control cycle using the numerical control parameter set in the parameter 123 for the movement route range output from the movement route range output unit 102. To generate interpolation point data.
  • the drive control simulation unit 104 simulates the movement of each axis of the numerically controlled machine tool using the drive control parameter set in the parameter 123 for the interpolation point data generated by the numerical control simulation unit 103. Tool tip position data is generated.
  • the machining simulation unit 105 reads the material shape data 124 representing the shape of the workpiece, constructs a virtual model of the workpiece, and virtually follows the tool tip position data generated by the drive control simulation unit 104.
  • the machining shape is estimated by moving the tool and removing the intersecting region with the virtual machining object from the virtual machining object, and the estimated machining shape data 125 is generated.
  • the material shape data 124 includes shape data from simple shapes typified by cubes and cylinders to complex machining shapes after machining simulation.
  • the shape error calculation unit 106 compares the estimated machining shape data 125 generated by the machining simulation unit 105 with the target machining shape data 126 representing the target machining shape, and calculates an error between the estimated machining shape and the target machining shape. Then, the shape error data 127 is generated.
  • the parameter adjustment unit 107 adjusts the numerical control parameter and the drive control parameter using the shape error data 127, and sets the adjusted parameter in the parameter 123.
  • the numerical control simulation execution range calculation unit 108 uses the shape error data 127 to calculate a tool movement path range in which the shape error does not fall within the allowable error. Then, the calculated tool movement path range is set in the numerical control simulation execution range 122.
  • FIG. 2 is a flowchart showing the operation of the numerical control parameter adjustment apparatus according to the present embodiment.
  • processing is started and a numerical control program and material shape data are input (S11). That is, a numerical control program for instructing the machining path of the workpiece is input from the outside and stored in the numerical control program 121.
  • the external input is performed by an output from the CAM or an input by a numerical control machine tool user.
  • material shape data representing the initial shape of the workpiece is input from the outside and stored in the material shape data 124.
  • the material shape data representing the initial shape is typically a cube and a cylinder.
  • External input is performed by reading CAD (Computer Aided Design) data or by selection by a numerically controlled machine tool user.
  • CAD Computer Aided Design
  • tool tip position data in a specified range is generated (S12). That is, first, the numerical control program analysis unit 101 reads and analyzes the numerical control program 121 to generate a movement path of the tool and the workpiece. Next, the movement path range output unit 102 generates a movement path range of the tool and the workpiece corresponding to the range set in the numerical control simulation execution range 122. Since the initial value of the numerical control simulation execution range 122 is set for all the movement route ranges, the simulation is performed over all the movement route ranges when the first simulation is executed. In addition, the numerical control simulation unit 103 uses the numerical control parameter set in the parameter 123 for the movement path range of the tool and the processing object output from the movement path range output unit 102, and uses the numerical control parameter.
  • the interpolation path data is generated by interpolating and accelerating / decelerating the movement path of each movement cycle.
  • the drive control set in the parameter 123 is performed on the interpolation point data obtained by the drive control simulation unit 104 interpolating the movement path range of the tool and the workpiece output from the numerical control simulation unit 103 for each control period.
  • FIG. 3 is a diagram illustrating an image of interpolation and acceleration / deceleration performed by the numerical control simulation unit 103.
  • an interpolation point I i obtained by linearly machining from R 201 to R 202 and interpolating and accelerating / decelerating a numerical control program instructing a machining path so as to machine from R 202 to R 203 in a straight line. (201 ⁇ i ⁇ 213) is shown.
  • 201 ⁇ i ⁇ 213 is shown.
  • in order to operate the numerically controlled machine tool according to correctly Directive must increase the rate of Y-axis speed of the X axis in the R 202 (s) to zero.
  • the X-axis speed is not set to zero, and the Y-axis speed is increased while decelerating the X-axis. Therefore, there is a deviation from the command path between the interpolation points I 205 to I 208 .
  • the machining time and machining accuracy vary depending on how much such deviation is allowed, and such allowable error is set as a numerical control parameter.
  • FIG. 4 is a diagram illustrating an image of a change in the tool tip position caused by considering the drive characteristics of the numerically controlled machine tool in the drive control simulation unit 104.
  • FIG. 4 shows how the speed of one target axis in the numerically controlled machine tool changes.
  • a dotted line C 201 indicates a command value of the speed of the target axis
  • a solid line C 202 indicates an estimated value of the speed of the target axis.
  • the speed of each axis causes a time delay C 203 and a steady deviation C 204 with respect to the command speed, and this time delay C 203 and the steady deviation vary, although it varies depending on the driving characteristics of the numerically controlled machine tool.
  • C 204 causes a deviation in the tool tip position and the position of the workpiece.
  • the machining shape is estimated (S13). That is, the machining simulation unit 105 reads the material shape data 124 stored in S11 to generate a virtual machining object, and virtually operates the tool in accordance with the tool tip position data generated in S12. The machining shape is estimated by removing the intersecting region between the tool and the virtual machining object from the virtual machining object. Then, the estimated machining shape data is stored in the estimated machining shape data 125.
  • FIG. 5 is a diagram illustrating an example of machining shape estimation performed by the machining simulation unit 105.
  • FIG. 5 shows changes in the material shape data 302 when the material shape data 302 is a cube, the tool 301 is a flat end mill, and the tool 301 is operated.
  • the tool 301 is a flat end mill.
  • the present invention is not limited to this, and the tool 301 may have any shape defined by a ball end mill and a drill.
  • the tool information may be managed by numbers, and the tool replacement timing may be transmitted to the machining simulation unit 105.
  • the estimated machining shape after the machining simulation can be used for the material shape data 302 of the next machining simulation.
  • the machining shape in finishing can be estimated after checking the machining shape in rough machining.
  • the shape error is calculated (S14). That is, the shape error calculation unit 106 compares the estimated machining shape data 125 and the target machining shape data 126 to calculate a shape error, and stores it in the shape error data 127.
  • the target machining shape data 126 is obtained by performing a machining simulation using the numerical control program 121 and the material shape data 124. Further, CAD data created by a numerically controlled machine tool user may be used as the target machining shape data 126.
  • the numerical control parameter adjusting device may include a display unit, and the estimated machining shape data 125, the target machining shape data 126, and the shape error data 127 may be displayed on the display unit for the numerically controlled machine tool user.
  • FIG. 6 is a diagram showing an image of shape error calculation performed by the shape error calculation unit 106.
  • FIG. 6 shows a state in which the estimated error data 404 is calculated by estimating the estimated machining shape data 402 from the material shape data 401 and comparing the estimated machining shape data 402 with the target machining shape data 403. .
  • FIG. 6 also shows an uncut region 405 and an overcut region 406.
  • Whether or not the shape error data falls within the allowable error is determined by calculating the volume of the shape error region when the shape error calculation unit 106 calculates the shape error data 127 and adding the error to the shape error data 127. A value is stored as an amount, and the error amount and the allowable error amount are compared with each other. In addition to the volume of the shape error area, the number of movement paths included in the shape error area may be used as the error amount. If the shape error data 127 is within the allowable error (S15: Yes), the process is terminated.
  • the parameter adjustment unit 107 reads the shape error data 127 and adjusts the parameters, and stores the adjusted parameters in the parameter 123.
  • the adjusted parameters are parameters that have not been set up to now.
  • the numerical control simulation execution range calculation unit 108 reads the shape error data 127 and extracts a region where the shape error exists and does not fall within the allowable error. Then, the moving path range of the tool that has passed through the extracted area is extracted and stored in the numerical control simulation execution range 122.
  • FIG. 7 is a diagram illustrating an image of a method for extracting a moving path range in which the shape error performed by the numerical control simulation execution range calculation unit 108 does not fall within the allowable error.
  • the command path of the numerical control program is R i (501 ⁇ i ⁇ 505)
  • the tool tip position obtained by the simulation is I j (501 ⁇ j ⁇ 513).
  • the tool tip positions between I 501 and I 505 and between I 509 and I 513 coincide with the command path of the numerical control program, and can be expressed as ranges A 501 and A 511 within the allowable error. .
  • the tool tip position between I 505 and I 509 deviates from the command path of the numerical control program, and the error exceeds the allowable error. Therefore, it is necessary to change the parameter to a path that falls within the allowable error. is there. Since such a shift in the path is transferred to the estimated machining shape in the machining simulation, a region between I 505 and I 509 causes a shape error.
  • the range between I 505 and I 509 can be expressed as a range A 502 that does not fall within the allowable error, and the command paths R 502 to R 503 and R 503 to R 504 of the numerical control program corresponding to the tool tip position are It becomes the numerical control simulation execution range A 503 .
  • FIG. 8 is a diagram showing an image of a parameter setting method in a range in which the shape error falls within the allowable error in the numerical control simulation execution range calculation unit 108.
  • FIG. 8 shows a state in which the command path of the numerical control program 121 is divided into ranges of B 501 , B 503 , and B 505 .
  • the command path range B 501 it is assumed that the shape error is within the allowable error with the initial parameter, and the command path range B 503 and B 505 has the shape error within the allowable error with the initial parameter, and parameter change 1 , 2, the parameters are adjusted to different parameters by the parameter adjustment unit 107.
  • the command path range B 501 including the numerical control programs 1 and 2 does not change the parameters because the shape error is within an allowable error with the initial parameters, but the command path range B 503 including the numerical control program m is included . Since the shape error is not within the permissible error in the initial parameters, the parameter is changed to the parameter adjusted in B502 as shown in the parameter change 1. Similarly, the command path range B 505 including the numerical control program n is changed to the parameter adjusted in B 504 as shown in the parameter change 2 because the shape error is not within the allowable error with the initial parameter. ing. Note that once the parameter is changed in the numerical control program 121, the parameter is changed from the initial parameter. Therefore, even if the command path range includes the shape error within the allowable error with the initial parameter, the command path range It is necessary to make changes to the initial parameters at the beginning. However, there is no need to make any particular changes at the top of the numerical control program 121.
  • the numerical control simulation execution range 122 is set in S17, the moving route range is limited in the subsequent numerical control simulation. Therefore, if the information of the starting point of the moving path range, the position of R 502 in FIG. 7, the velocity and the acceleration is stored in S17 and used as the initial state values, the numerical control simulation unit 103 and the drive control simulation unit 104 move. A simulation with a limited route range can be performed.
  • the starting point information of each movement route range may be stored.
  • the numerical control parameter adjustment device executes the numerical control simulation and the drive control simulation only in a range where the shape error does not fall within the allowable error after the parameter change. Therefore, the time required to obtain the parameter change result can be shortened, and the time for the numerically controlled machine tool user to adjust the parameter can be shortened.
  • the numerical control parameter adjustment device may be constructed on a network so that parameters can be acquired via the Internet.
  • the time for adjusting the parameters can be further shortened.
  • grid computing or cloud computing can be used.
  • Embodiment 2 a numerical control parameter adjustment device that performs an operation different from that of the first embodiment will be described.
  • the configuration of the numerical control parameter adjustment device according to the present embodiment is the same as the configuration shown in FIG.
  • FIG. 9 is a flowchart showing the operation of the numerical control parameter adjusting apparatus in the present embodiment.
  • parameters that is, numerical control parameters and drive control parameters are input (S21).
  • a simulation is executed (S22). That is, the calculation of the shape error is performed as in S11 to S14 in FIG.
  • S23 it is determined whether or not the shape error data 127 stored in S22 falls within an allowable error (S23). If the shape error data 127 stored in S22 is within the allowable error (S23: Yes), the process is terminated.
  • the shape error data 127 stored in S22 When the shape error data 127 stored in S22 does not fall within the allowable error (S23: No), the shape error data 127 stored in S22 is smaller, that is, the shape error data 127 stored in S22 is currently It is determined whether or not it is smaller than the smallest shape error data (S24). As an example, comparison between the shape error data is performed by calculating the volume of the shape error region when the shape error calculation unit 106 calculates the shape error data 127 and storing the value in the shape error data 127 as an error amount. It can be easily executed by comparing the error amounts. In addition to the volume of the shape error area, the number of movement paths included in the shape error area may be used as the error amount. In this way, the parameters can be adjusted so as to reduce the shape error.
  • the numerical control simulation execution range and the optimum parameters are updated (S25). That is, the currently set parameter is updated as the optimum parameter, and the numerical control simulation execution range is updated by the same processing as in FIG. Since there is no comparison target at the time of the first simulation execution, the numerical control simulation execution range and the optimum parameters are updated in this case (S25).
  • the set parameter and the corresponding shape error data are stored, and the parameter having the smallest error amount of the shape error data is stored as the optimum parameter.
  • the parameter having the smallest error amount of the shape error data and the error amount at the present are known, comparison between the shape error data in S24 is facilitated.
  • the numerical control simulation execution range is calculated using the shape error data having the smallest error amount of the shape error data at present. Therefore, since the numerical control simulation execution range is calculated only when the error amount of the shape error data is small, the numerical control simulation execution range is narrowed, and the simulation execution time can be further shortened.
  • each parameter is adjusted and updated using the parameter corresponding to the shape error data with the smallest error amount of the shape error data at present.
  • FIG. 10 is a diagram showing the parameter adjustment process shown in S26. First, it is determined whether or not the parameter to be adjusted has a range (S31). If the parameter to be adjusted has a range (S31: Yes), the parameter is set to the lower limit value, and after executing the simulation, the parameter is set to the upper limit value and the simulation is executed (S32). When the lower limit value and the upper limit value are not fixed, values set by the numerical control machine tool user may be used.
  • the parameter to be adjusted does not have a range (S31: No)
  • the parameter is set to ON or OFF, a parameter different from the currently set parameter is set, and the simulation is executed (S36).
  • the upper and lower limits are set with the parameter having the smaller shape error and the current parameter (S33).
  • the shape error of the parameter set to the lower limit value is compared with the shape error of the parameter set to the upper limit value. If the shape error of the lower limit parameter is smaller, the current parameter is set as the new upper limit value. If the shape error of the upper limit parameter is smaller, the current parameter is set as a new lower limit value.
  • the parameter is set to an intermediate value and a simulation is executed (S34). That is, a parameter is set to an intermediate value between the lower limit value and the upper limit value set in S33, and a simulation is executed.
  • S34 by setting the current parameter to an intermediate value, it is possible to search for a parameter having a small shape error while narrowing the parameter range in half, and the parameter can be adjusted effectively. Is possible.
  • the numerical control parameter adjustment device stores the current optimum parameters and shape error data, and only when the shape error becomes smaller, the parameter and shape error
  • the parameters can be effectively adjusted by updating the data and the numerical control simulation execution range. Further, as the parameters are adjusted in the optimum direction, the shape error region is narrowed, and the simulation execution range is similarly narrowed. Therefore, the time required to obtain the parameter change result can be shortened, and the time for the numerically controlled machine tool user to adjust the parameter can be shortened.
  • the parameter adjusted by the operator it is also possible to provide the parameter adjusted by the operator to the numerically controlled machine tool user in the remote place, so that an operator who is skilled in handling the numerically controlled machine tool is arranged at the base, It is also possible to provide adjusted parameters to numerically controlled machine tool users at various remote locations. Also in this embodiment, a configuration may be adopted in which parameters can be acquired via the Internet. In addition, the time for adjusting the parameters using calculation resources on the network may be further shortened.
  • FIG. 11 is a diagram showing a configuration of a numerical control parameter adjusting apparatus according to Embodiment 3 of the present invention.
  • the numerical control parameter adjustment apparatus shown in FIG. 11 has a configuration in which a material shape data update unit 109 is added to the numerical control parameter adjustment apparatus shown in FIG. Therefore, the description of the configuration other than the material shape data update unit 109 is omitted.
  • the material shape data update unit 109 updates the material shape data 124 using the shape error data 127 calculated by the shape error calculation unit 106.
  • FIG. 12 is a flowchart showing the operation of the numerical control parameter adjusting apparatus according to the present embodiment.
  • the flowchart shown in FIG. 12 is the same as the flowchart shown in FIG. 2 except for the process of updating the material shape data in S18. For this reason, description of processes other than S18 is omitted.
  • the material shape data updating unit 109 updates the material shape data 124 with the result of correcting the region where the shape error data 127 exists with respect to the estimated processed shape data 125 (S18).
  • the updated material shape data 124 may be displayed on the display unit for the numerical control machine tool user.
  • the processing of S16, the processing of S17, and the processing of S18 are performed in parallel. Note that the process of S16, the process of S17, and the process of S18 may be processed in series regardless of the order.
  • FIG. 13 is a diagram showing an image of material shape data update performed by the material shape data update unit 109.
  • the material shape data update unit 109 compares the material shape data 601 with the estimated processed shape data 602 and updates the material shape data 603.
  • the estimated machining shape data is left as it is.
  • the portion determined to be left uncut in S14 is left as the estimated machining shape data, and the portion determined as being excessively cut.
  • the correction amount is obtained by multiplying the error amount of the shape error volume of the overcut region by a factor. This coefficient is set by the numerically controlled machine tool user.
  • the shape of the shape is already estimated in the region that does not include the shape error data in the next and subsequent machining simulations, so that the execution time of the machining simulation can be shortened. Further, in the area including the shape error data, it can be determined whether there is no uncut portion again for the portion that is determined to be left uncut, and it is determined whether the portion that is determined to be over cut is excessively cut. be able to. Therefore, it is possible to verify whether or not the newly set parameters are functioning effectively.
  • the numerical control parameter adjustment device executes the numerical control simulation, the drive control simulation, and the machining simulation only in a range in which the shape error does not fall within the allowable error after the parameter change. To do. Therefore, the time required to obtain the parameter change result can be shortened, and the time for the numerically controlled machine tool user to adjust the parameter can be shortened.
  • the parameter adjusted by the operator it is also possible to provide the parameter adjusted by the operator to the numerically controlled machine tool user in the remote place, so that an operator who is skilled in handling the numerically controlled machine tool is arranged at the base, It is also possible to provide adjusted parameters to numerically controlled machine tool users at various remote locations. Also in this embodiment, a configuration may be adopted in which parameters can be acquired via the Internet. In addition, the time for adjusting the parameters using calculation resources on the network may be further shortened.
  • machining simulation is performed using the tool tip position generated by performing numerical control simulation and drive control simulation, and the estimated machining shape and the tool described in the numerical control program are processed.
  • a range in which the machining accuracy does not meet the requirements for the currently set numerical control parameters and drive control parameters is extracted. . If there is a range where the machining accuracy does not satisfy the requirement, the numerical control parameter is changed, and further simulation is performed only within the range. In this way, when the numerical control parameter is changed, the range of the movement path of the tool and the workpiece to be numerically controlled and the drive control simulation is narrowed. Therefore, the time for the numerical control simulation and the drive control simulation to be repeated is shortened. Can continue.
  • FIG. 14 is a diagram showing a configuration of a numerical control parameter adjusting apparatus according to Embodiment 4 of the present invention.
  • a numerical control parameter adjusting device 1401 shown in FIG. 14 includes a numerical control program dividing unit 1431, a processing object partial region specifying unit 1432, a specified region divided program extracting unit 1433, a numerical control parameter setting unit 1434, and a cutting deformation.
  • a control unit 1402 having a processing unit 1435, a cutting deformation result display unit 1436, and an optimum numerical control program output unit 1437 is provided.
  • the numerical control parameter adjustment device 1401 includes a storage unit 1403 that stores numerical control parameter adjustment information 1445 including a division program 1441, a partial region 1442, and a division parameter 1443.
  • the storage unit 1403 stores a three-dimensional model 1444 of the processing object.
  • the numerical control parameter adjusting device 1401 includes an input device 1411 and a display device 1412.
  • the display device 1412 include a display that is a display output destination of the cutting deformation result.
  • Examples of the input device 1411 include a keyboard and a mouse for the operator to select a partial area and set numerical control parameters. Note that the input device 1411 and the display device 1412 may be provided outside the numerical control parameter adjustment device 1401.
  • the numerical control parameter adjusting device 1401 includes a numerical control program 1421 that is an input of the numerical control program dividing unit 1431, a numerical control parameter 1422 that is an initial value of the dividing parameter 1443, a designated area divided program extracting unit 1433, A tool model 1423 that is an input of the cutting deformation processing unit 1435 is externally input, and an optimal numerical control program 1424 that is an output of the optimal numerical control program output unit 1437 is externally output.
  • FIG. 15 is a diagram showing a hardware configuration for realizing the numerical control parameter adjusting apparatus according to the fourth embodiment of the present invention.
  • a control unit 1402 illustrated in FIG. 14 is a processing device including a processor 1501 and a memory 1502, and each functional unit included in the control unit 1402 is realized by the processor 1501 by software processing.
  • the storage unit 1403 is a storage 1503 that holds data in a nonvolatile manner.
  • software that implements each functional unit of the control unit 1402 is also stored in the storage 1503.
  • the division program 1441 is stored in the storage unit 1403 by the numerical control program division unit 1431.
  • the numerical control program dividing unit 1431 receives the numerical control program 1421 and divides the numerical control program 1421 into one or more divided programs 1441 for each block where all axes of the numerically controlled machine tool are stopped. Specifically, the numerical control program dividing unit 1431 determines whether or not all the axes of the numerically controlled machine tool are blocks that stop one block at a time from the top of the numerical control program 1421.
  • the numerical control program 1421 is divided with the block up to one division program.
  • the rapid feed command G0 and the duel command G4 can be exemplified in addition to the head and end portions of the numerical control program 1421.
  • the partial area 1442 is information indicating a partial area of the workpiece to be adjusted by the operator and is stored in the storage unit 1403 by the workpiece partial area specifying unit 1432.
  • the processing target partial area specifying unit 1432 causes the operator to specify the partial area 1442 via the input device 1411.
  • the operator can easily select the partial area 1442 by displaying the three-dimensional model 1444 of the workpiece and the selected partial area 1442 to the operator via the display device 1412.
  • a plurality of partial regions 1442 may be selected. Examples of the partial region 1442 include a rectangular region and a spherical region.
  • the designated area division program extraction unit 1433 receives the division program 1441, the partial area 1442, and the tool model 1423, and extracts the division program 1441 through which the tool model 1423 passes through the partial area 1442.
  • the division program 1441 extracted here is one in which the tool passes through the partial area 1442 even in one block of each of the division programs 1441.
  • Whether the tool model 1423 passes through the partial area 1442 is determined based on whether there is an intersecting area between the tool model 1423 and the sweep shape formed by the movement command of the block and the partial area 1442. Just do it.
  • the division parameter 1443 represents a numerical control parameter corresponding to each division program 1441, and is stored in the storage unit 1403 by the numerical control parameter setting unit 1434.
  • the numerical control parameter setting unit 1434 sets the division parameter 1443 according to the operator's operation on the input device 1411. Examples of the numerical control parameters set here include parameters related to machining time or machining accuracy, including corner deceleration angle and acceleration / deceleration coefficient.
  • the numerical control parameter adjustment information 1445 is a database including a division program 1441, a partial area 1442, and a division parameter 1443.
  • the three-dimensional model 1444 of the workpiece is three-dimensional data representing the shape of the workpiece after cutting deformation, and is stored in the storage unit 1403 by the cutting deformation processing unit 1435.
  • Specific examples of the three-dimensional model include a boundary expression model that expresses the surface shape of the target shape by a set of triangular or polygonal surfaces, a voxel model that expresses the target shape by a set of minute cubes, and other similar models. It is a discrete model.
  • the cutting deformation processing unit 1435 receives the tool model 1423 and the numerical control parameter adjustment information 1445 as inputs, and performs a process of cutting and deforming the three-dimensional model 1444 of the workpiece.
  • a region corresponding to the partial region 1442 included in the cutting deformation information in the three-dimensional model 1444 of the workpiece is restored to the three-dimensional model 1444 of the workpiece before cutting deformation.
  • each range of the numerical control program corresponding to the partial area 1442 in the numerical control parameter adjustment information 1445 included in the tool model 1423 and the cutting deformation information, and the movement trajectory based on the numerical control parameters set for each of the ranges is obtained as the shape of the workpiece after cutting. Update.
  • the cutting deformation result display unit 1436 receives the three-dimensional model 1444 of the workpiece, generates a projection image based on the specified line-of-sight direction and display scale, and outputs the projection image to the display device 1412.
  • the optimum numerical control program output unit 1437 receives the division program 1441 and the division parameter 1443 of the numerical control parameter adjustment information 1445 as input, and inserts a block to be changed to the division parameter 1443 set for each division program 1441 at the head of the division program 1441. Then, an optimum numerical control program 1424 in which these division programs 1441 are integrated is output. Note that programmable parameter input functions G10 and L70 can be exemplified as the numerical control parameter change block.
  • FIG. 16 is a flowchart showing a numerical control parameter adjustment method using the numerical control parameter adjustment device 1401 according to the fourth embodiment.
  • the cutting deformation from the beginning to the end of the machining is input by the operator to the three-dimensional model 1444 of the machining object indicating the entire machining object.
  • the numerical control program dividing unit 1431 Inside the numerical control parameter adjusting device 1401, the numerical control program dividing unit 1431, the cutting deformation processing unit 1435, and the cutting deformation result display unit 1436 are operated, whereby the numerical control program 1421 is divided and the entire workpiece is processed. Cutting deformation and display on the three-dimensional model 1444 of the workpiece to be processed are executed (step S41).
  • the numerical control program dividing unit 1431 divides the numerical control program 1421 into one or more divided programs 1441.
  • the shape of the entire workpiece is set as the initial value of the partial area 1442
  • the numerical control parameter 1422 is set as the initial value of the division parameter 1443 for each of the division programs 1441
  • the cutting deformation processing unit 1435 The control parameter adjustment information 1445 and the tool model 1423 are input, and the three-dimensional model 1444 of the processing target that indicates the entire processing target is cut and deformed.
  • the cutting deformation result display unit 1436 graphically displays the three-dimensional model 1444 of the processing object indicating the entire processing object on the display device 1412 based on the viewing direction and the display scale.
  • the operator inputs the partial area 1442 including the vicinity of the problem point on the processing through the input device 1411 while referring to the display of the cutting deformation result.
  • the partial area 1442 is set (step S ⁇ b> 42) by the processing object partial area specifying unit 1432, and the specified area division program extracting unit 1433 operates.
  • the specified area division program extraction unit 1433 receives the partial area 1442, the tool model 1423, and the division program 1441, and extracts the division program 1441 through which the tool model 1423 passes through the partial area 1442 (step S43). .
  • a numerical control parameter setting unit 1434 receives the extracted divided program and sets a numerical control parameter for each divided program.
  • the cutting deformation processing unit 1435 receives the tool model 1423 and the numerical control parameter adjustment information 1445 as input, performs cutting deformation processing again on the region of the three-dimensional model 1444 of the workpiece corresponding to the partial region 1442, and displays the cutting deformation result. Update.
  • the cutting deformation result display unit 1436 graphically displays the three-dimensional model 1444 of the processing object indicating the entire processing object on the display device 1412 based on the viewing direction and the display scale.
  • the adjustment of the numerical control parameter is terminated without repeating the adjustment. If there is a problem with the set numerical control parameter, that is, if the machining accuracy required by the set numerical control parameter is not satisfied, the adjustment is repeated and the process returns to the setting of the numerical control parameter (S44).
  • the optimum numerical control program 1424 is output (step S46). Inside the numerical control parameter adjustment device 1401, the optimum numerical control program output unit 1437 operates, and a block to be changed to the division parameter 1443 adjusted for each division program 1441 is inserted at the top of the division program 1441, and the division program 1441 is inserted. An optimal numerical control program 1424 in which is integrated is output. If there are other problem points in processing, the process returns to the setting of the partial area 1442 (S42).
  • the cutting deformation result is updated only for the numerical control program corresponding to the range through which the tool passes in the region set as the workpiece. Moreover, since the influence on the cutting deformation result by the change of the numerical control parameter is limited only within the range, the numerical control parameter can be adjusted for each of the ranges. Therefore, the time until the operator obtains the result of changing the numerical control parameter can be shortened, and the efficiency of the adjustment work of the numerical control parameter can be improved.
  • the operator can provide a numerically controlled program after adjusting numerical control parameters to a numerically controlled machine tool user at a remote location.
  • the numerical control parameter adjustment device may be configured to be connected to a network and obtain a numerical control program after numerical control parameter adjustment via the Internet.
  • a network By using computational resources on the network, it is possible to provide a numerical control parameter adjusting device that does not depend on the performance of computational resources owned by the operator.
  • grid computing or cloud computing can be used.
  • FIG. 17 is a diagram showing a configuration of a numerical control parameter adjustment apparatus according to Embodiment 5 of the present invention.
  • the numerical control program dividing unit 1731 operates differently from the numerical control program dividing unit 1431 in the fourth embodiment, and in addition, a new numerical control program is added. It differs from the numerical control parameter adjustment device 1401 of the fourth embodiment in that the control unit 1702 includes a cutting deformation determination unit 1732 that determines whether each block contributes to cutting deformation. Other data and individual operations of the processing unit are the same as those in the fourth embodiment.
  • the cutting deformation determination unit 1732 receives the numerical control program 1421 and the tool model 1423 as input, and determines whether or not each block from the top of the numerical control program 1421 contributes to the cutting deformation. Specifically, as in the case of the cutting deformation processing unit 1435, a common area of the sweep shape composed of the movement trajectory based on each block of the tool model 1423 and the numerical control program 1421 and the three-dimensional model 1444 of the processing target is processed. It is removed from the three-dimensional model 1444 of an object, and it is determined whether each block contributes to cutting deformation depending on whether a common area exists.
  • the numerical control program dividing unit 1731 receives the numerical control program 1421 and the result of the cutting deformation determining unit 1732 as inputs, and divides the numerical control program 1421 into one or more divided programs 1441.
  • the block that cuts and deforms the workpiece is a cutting block
  • the other blocks are idle running blocks
  • the direction from the beginning to the end of the numerical control program 1421 is followed, and from the end of the numerical control program 1421
  • the distance between the free running block and the cutting block in front of the free running block, the free running block and the free running is divided by idle running blocks in which the distance between the cutting blocks after the block is equal to or greater than the acceleration / deceleration distance.
  • the acceleration / deceleration distance is a movement distance necessary to reach the maximum feed speed determined from the feed speed, machine acceleration, and time constant.
  • each block of the numerical control program 1421 is changed by the cutting deformation determination unit 1732. It is determined whether or not it contributes to the cutting deformation. Based on the determination result, the numerical control program dividing unit 1731 divides the numerical control program 1421.
  • the numerical control parameter adjustment device according to the fifth embodiment is divided more finely than the numerical control parameter adjustment device according to the fourth embodiment. That is, since it is possible to adjust to the optimal numerical control parameter in a finer range, the machining accuracy can be further improved.
  • the cutting deformation result is updated only for the numerical control program corresponding to the range through which the tool passes in the region set as the workpiece. Further, since the influence on the movement trajectory due to the change of the numerical control parameter is limited only within the range, the numerical control parameter can be adjusted for each range. Therefore, the time until the operator obtains the result of changing the numerical control parameter can be shortened, and the adjustment time of the numerical control parameter can be shortened.
  • whether or not there is a numerically controlled machine tool can be used. Therefore, the operator can provide a numerically controlled program after adjusting numerical control parameters to a numerically controlled machine tool user at a remote location.
  • the numerical control parameter adjustment device may be configured to be connected to a network and obtain a numerical control program after numerical control parameter adjustment via the Internet.
  • a network By using computational resources on the network, it is possible to provide a numerical control parameter adjusting device that does not depend on the performance of computational resources owned by the operator.
  • grid computing or cloud computing can be used.
  • FIG. 18 is a diagram showing a configuration of a numerical control parameter adjustment device according to Embodiment 6 of the present invention.
  • the numerical control parameter adjustment device 1801 includes a machining object partial region designating unit 1831, a numerical control parameter setting unit 1832, and an optimum numerical control program output unit 1833 according to the fourth embodiment.
  • the object partial region designation unit 1432, the numerical control parameter setting unit 1434, and the optimum numerical control program output unit 1437 perform different operations.
  • the target shape three-dimensional model 1821 and the three-dimensional object to be processed are newly added.
  • the control unit 1802 includes a shape error calculation unit 1834 that calculates a shape error by comparing with the model 1444, and a numerical control parameter that stores shape error data 1841 calculated by the shape error calculation unit 1834 and a plurality of numerical control parameters.
  • the point that the storage unit 1803 includes the adjustment table 1842 is the numerical control parameter of the fourth embodiment. Different from the meter adjustment apparatus. Other data and individual operations of the processing unit are the same as those in the fourth embodiment.
  • the shape error calculation unit 1834 calculates the shape error data 1841 by comparing the three-dimensional model 1821 of the target shape with the three-dimensional model 1444 of the workpiece. Note that the shape error calculation unit 1834 also calculates a shape error volume, which is a volume error of both, as an index for comparing the shape errors.
  • the processing target object partial area designating unit 1831 newly receives the shape error data 1841, and sets a partial area 1442 in which a shape error exists and the shape error volume exceeds the allowable error volume.
  • the allowable error volume is set by the operator via the input device 1411.
  • the numerical control parameter setting unit 1832 newly receives the numerical control parameter adjustment table 1842 as an input, and is registered in the numerical control parameter adjustment table 1842 as numerical control parameters for the divided program extracted by the designated area divided program extraction unit 1433.
  • One of the numerical control parameters is set as the division parameter 1443.
  • the shape error calculation unit 1834 calculates the shape error based on the cutting deformation result obtained through the cutting deformation process, and calculates the shape error data 1841.
  • FIG. 19 is a diagram illustrating an operation of the optimum numerical control program output unit 1833 of the numerical control parameter adjustment device according to the sixth embodiment of the present invention.
  • the numerical control parameter adjustment information 1843 is held so that a plurality of division parameters 1443 and corresponding shape error data 1841 can be referenced in association with each division program 1441.
  • the optimum numerical control program output unit 1833 extracts the division parameter 1443 having the smallest shape error volume for each division program 1441, and inserts a block to be changed to the division parameter at the head of the division program 1441.
  • an optimum numerical control program 1424 in which these divided programs are integrated is output.
  • the shape error data 1841 is newly calculated by the shape error calculation unit 1834. Based on the shape error data 1841, a region having a shape error volume exceeding the allowable error volume is set as the partial region 1442 without an operator's operation.
  • the numerical control parameters registered in the numerical control parameter adjustment table 1842 are set in the division parameter 1443 without the operator's operation. Then, after the cutting deformation process, the shape error data 1841 is newly calculated by the shape error calculation unit 1834. If all the numerical control parameters registered in the numerical control parameter adjustment table 1842 have not been set, the process returns to the numerical control parameter setting.
  • the optimum numerical control program output unit 1833 inserts a block to be changed to a numerical control parameter having the smallest shape error volume for each division program 1441 at the head of the division program 1441, and an optimum numerical control program 1424 in which these division programs are integrated is inserted. Output.
  • the numerical control parameter adjustment device In the numerical control parameter adjustment device according to the sixth embodiment, if a plurality of numerical control parameters are registered in the numerical control parameter adjustment table in advance, the minimum shape error volume and the partial region setting operation are not performed by the operator. Can be adjusted to the numerical control parameters. Therefore, it is possible to provide a numerical control parameter adjusting device with higher work efficiency.
  • the cutting deformation result is updated only for the numerical control program corresponding to the range through which the tool passes in the region set as the workpiece. Further, since the influence on the movement trajectory due to the change of the numerical control parameter is limited only within the range, the numerical control parameter can be adjusted for each range. Therefore, the time until the operator obtains the result of changing the numerical control parameter can be shortened, and the time for adjusting the numerical control parameter can be shortened.
  • the numerical control parameter adjustment device may be configured to be connected to a network and obtain a numerical control program after numerical control parameter adjustment via the Internet.
  • a network By using computational resources on the network, it is possible to provide a numerical control parameter adjusting device that does not depend on the performance of computational resources owned by the operator.
  • grid computing or cloud computing can be used.
  • the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

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  • Manufacturing & Machinery (AREA)
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  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
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Abstract

La présente invention comprend : une unité de traitement de déformation de coupe (1435) qui coupe et déforme un modèle en trois dimensions d'une pièce sur la base d'un programme de commande numérique, d'un paramètre de commande numérique et d'un modèle d'outil; une unité de division de programme de commande numérique (1431) qui divise le programme de commande numérique en un ou plusieurs programmes de division pour chacun des blocs qui sont contenus dans le programme de commande numérique et dans lesquels tous les arbres d'une machine-outil à commande numérique s'arrêtent; une unité de spécification de région de partie de pièce (1432) qui spécifie une région de partie représentant une région partielle du modèle en trois dimensions de la pièce; une unité d'extraction de programme de division de région spécifiée à l'intérieur (1433) qui extrait un programme de division avec lequel un modèle d'outil traverse la région de partie spécifiée; une unité de définition de paramètre de commande numérique (1434) qui définit un paramètre de commande numérique dans le programme de division extrait; et une unité de sortie de programme de commande numérique optimal (1437) qui insère dans chaque programme de division une instruction pour passer à un ensemble de paramètres de commande numérique défini et qui émet un programme de commande numérique intégrant les programmes de division.
PCT/JP2017/005765 2016-02-23 2017-02-16 Dispositif de réglage de paramètre de commande numérique et procédé de réglage de paramètre de commande numérique WO2017145912A1 (fr)

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