WO2023286151A1 - 加工時間推定方法、加工時間推定装置、コンピュータプロブラム及び記録媒体 - Google Patents
加工時間推定方法、加工時間推定装置、コンピュータプロブラム及び記録媒体 Download PDFInfo
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- WO2023286151A1 WO2023286151A1 PCT/JP2021/026274 JP2021026274W WO2023286151A1 WO 2023286151 A1 WO2023286151 A1 WO 2023286151A1 JP 2021026274 W JP2021026274 W JP 2021026274W WO 2023286151 A1 WO2023286151 A1 WO 2023286151A1
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- 238000003754 machining Methods 0.000 title claims abstract description 393
- 238000000034 method Methods 0.000 title claims description 16
- 238000004590 computer program Methods 0.000 title claims description 10
- 230000006870 function Effects 0.000 description 18
- 238000005520 cutting process Methods 0.000 description 11
- 230000007246 mechanism Effects 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000007730 finishing process Methods 0.000 description 1
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- 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
-
- 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
- G05B19/401—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 control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes
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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
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
-
- 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
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/31—From computer integrated manufacturing till monitoring
- G05B2219/31412—Calculate machining time, update as function of load, speed
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- 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
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/36—Nc in input of data, input key till input tape
- G05B2219/36219—Calculate machining information, like time, surface to be machined from program
Definitions
- the present invention relates to a machining time estimation method, a machining time estimation device, etc. for estimating the machining time of a workpiece in an NC machine tool.
- Patent Document 1 As a device for estimating the machining time of a workpiece in an NC machine tool, the one disclosed in Japanese Patent Application Laid-Open No. 2003-175439 (Patent Document 1 below) is conventionally known.
- This machining time estimating device includes a program storage unit for storing an NC program composed of a plurality of command blocks, and after reading the NC program stored in the program storage unit and analyzing it for each block, based on the analysis result
- a program analysis unit that outputs a control signal, receives the control signal output from the program analysis unit, and based on the received control signal, operates each drive mechanism unit related to axis movement and auxiliary functions of the NC machine tool.
- a device for estimating a machining time when machining is performed using the NC program in the NC machine tool including a drive control unit for controlling.
- the machining time control device includes a database in which actual operation time data of the drive mechanism unit related to the auxiliary function is stored, control signals output from the program analysis unit, and operations obtained from the drive mechanism unit.
- actual operation time calculation means for calculating an actual operation time of at least the drive mechanism unit related to the auxiliary function based on the completion signal, and updating data stored in the database with data related to the calculated actual operation time; Analyze the NC program stored in the program storage unit for each block, calculate an estimated operation time of the drive mechanism unit related to the axis movement based on the analysis result, and search the database based on the analysis result.
- the operation time estimation means calculates the estimated machining time by integrating the calculated estimated operation times of the respective blocks.
- the actual operating time calculation means calculates the actual operating time of at least the drive mechanism unit related to the auxiliary function each time the machine tool performs actual machining, and the calculated actual operating time
- the data stored in the database is updated with such data.
- this updating process can increase the reliability of the data stored in the database.
- the operating time estimating means performs the processing of estimating the machining time using the database whose reliability is improved as described above. That is, the NC program stored in the program storage unit is analyzed for each block, and when an axis movement command is issued, the axis movement amount is determined based on the axis movement command, and the axis movement amount and the determined axis movement amount are calculated. An estimated operation time for axis movement is calculated based on the commanded axis feed rate. When the auxiliary function operation is commanded, the database is searched based on the auxiliary function operation command, and the corresponding auxiliary function operation time is acquired.
- the time obtained by the above processing is used as the estimated operation time of the block.
- the time obtained by the above processing is added. is used as the estimated operation time of the block, and when the axis movement and the auxiliary function operation are performed in parallel, the longer of the times obtained by the above processing is used as the estimated operation time of the block. .
- the estimated machining time is calculated by integrating the estimated operation times.
- the actual operation time of the auxiliary function changes with time or changes depending on the state of the machine tool
- the actual operation time can be changed using the database reflecting the actual situation. Since the time is calculated, it is possible to calculate a highly accurate machining time that matches the actual state of the machine tool.
- the cutting speed is subject to certain restrictions due to multiple factors such as work material, tool wear, and toughness of the tool.
- the limit is determined by the rated output and tool performance, which are the performance of the spindle motor mounted on the NC machine tool.
- the machining conditions differ depending on the performance of the spindle motor mounted on the NC machine tool and the tools used, and the NC programs created under these machining conditions also differ. Therefore, when machining a certain workpiece, the machining time varies depending on the performance of the spindle motor mounted on the NC machine tool and the tool used.
- the present invention has been made in view of the above circumstances, and is a machining time estimator capable of estimating a shortened machining time according to the performance when machining the same workpiece using a new machine tool.
- the object of the present invention is to provide a method, a machining time estimation device, and the like.
- the present invention for solving the above problems is Using an NC program created for machining a predetermined work, a machining time when the work is machined by a first NC machine tool is obtained as a first machining time, and Acquiring a high-load machining ratio, which is a ratio of high-load machining time that is executed in a high-load state of a predetermined level or more to the rated output of the first spindle motor provided in the first NC machine tool, Based on the obtained first machining time, the high-load machining ratio, the rated output of the first spindle motor, and the rated output of the second spindle motor provided in the second NC machine tool, the workpiece is processed by the second NC machine tool. and the load state with respect to the rated output of the second spindle motor is the same high load state as that of the first NC machine tool.
- a machining time estimation method for estimating a second machining time when the work is machined by the second NC machine tool is obtained as a first machining time, and Acquiring a
- the present invention is a device capable of suitably implementing the above-described machining time estimation method, a motor information input unit for inputting the rated output of the first spindle motor provided in the first NC machine tool and the rated output of the second spindle motor provided in the second NC machine tool; a machining time input unit for inputting, as a first machining time, a machining time when the work is machined by the first NC machine tool using an NC program created for machining a predetermined work; A high-load machining ratio input unit for inputting a high-load machining ratio, which is a ratio of high-load machining time that is executed in a high-load state of a predetermined or higher load with respect to the rated output of the first spindle motor, in the first machining time.
- a machining time estimating unit for estimating a second machining time when the second NC machine tool machining the work by changing the NC program under the same high load condition as in It depends.
- the rated output of the first spindle motor provided in the first NC machine tool and the rated output of the second spindle provided in the second NC machine tool are output from the motor information input unit.
- the rated power of the motor is entered and retrieved.
- the first machining time when machining the workpiece by the first NC machine tool is input, and from the high load machining ratio input unit , a high-load machining ratio, which is the ratio of the high-load machining time that is executed in a high-load state equal to or higher than a predetermined value with respect to the rated output of the first spindle motor, in the first machining time is input and acquired.
- the machining time estimating unit determines the machining time when the work is machined by the second NC machine tool and the load state with respect to the rated output of the second spindle motor.
- a second machining time is estimated when the work is machined by the second NC machine tool by changing the NC program to the same high load condition as the high load condition in the 1 NC machine tool.
- the first NC machine tool is assumed to be the existing equipment
- the second NC machine tool is assumed to be the equipment to be renewed
- the second NC machine tool to be renewed is used.
- the load state with respect to the rated output of the second spindle motor is the same high load state as the high load state in the first NC machine tool. Since the machining time, that is, the second machining time shortened according to the performance of the second NC machine tool is estimated, the user can obtain it when updating from the existing first NC machine tool to the second NC machine tool. The effect can be easily recognized.
- the second machining time can be estimated without creating a new NC program that is improved according to the performance of the second NC machine tool to be updated, the user can change the existing first NC machine tool to the second machining time. It is possible to easily and quickly recognize the effect that can be obtained by updating to a 2NC machine tool.
- the machining time estimator assumes that the first machining time is T 1 , the high-load machining rate is R, the rated output of the first spindle motor is MP 1 , and the rated output of the second spindle motor is MP 2 .
- the high load means that the output of the spindle motor is a load of a predetermined ratio or more of its rated output.
- the output of the spindle motor is 80% or more of the rated output.
- the high-load machining ratio means the ratio of the machining time in which the output of the spindle motor during machining has a high load to the entire machining time.
- the processing time estimation device includes a touch panel having a function of inputting data and a function of displaying data
- the motor information input unit, the machining time input unit, and the high load machining ratio input unit are configured to input information through the touch panel
- the machining time estimating unit may adopt a mode configured to display the estimated second machining time on the touch panel.
- each data can be easily input, and the estimated second processing time can be easily confirmed (recognized).
- the rated output of the first spindle motor and the rated output of the second spindle motor are, of course, provided by the manufacturer of the first NC machine tool and the manufacturer of the second NC machine tool, respectively.
- the first machining time and the high-load machining ratio can be obtained as actual data when machining using the existing first NC machine tool.
- these data can be obtained from the data obtained by this monitoring system.
- manually measure the first machining time and monitor the load state of the first spindle motor during machining to determine the first machining time and the High load machining ratio can be acquired.
- the first machining time and the high-load machining ratio can be estimated by analyzing the NC program.
- the machining time estimating device executes an NC program created for machining the workpiece using at least the information about the workpiece, the information about the tool, and the machine information about the first NC machine tool.
- a machining state analysis unit that estimates the first machining time and the high load machining ratio when machining is performed by the first NC machine tool, The machining state analysis unit is configured to input the estimated first machining time to the machining time input unit and to input the high load machining ratio to the high load machining ratio input unit.
- the first machining time can be estimated from the tool path obtained by analyzing the NC program, the feed rate, and the like.
- the high-load machining ratio is obtained by estimating the high-load machining time from the information on the work, the information on the tool, and the machine information on the first NC machine tool in addition to the tool path and feed rate. , can be calculated as the ratio of the high-load machining time to the first machining time.
- the load MP [kW] of the spindle motor acting during machining can be calculated from the following formula.
- MP f ⁇ Vc ⁇ D ⁇ Kc/(60 ⁇ 10 3 ⁇ ) where f is the feed rate per revolution [mm/rev], Vc is the cutting speed [m/min], D is the machining diameter [mm], Kc is the cutting resistance [MPa], and ⁇ is the machine efficiency coefficient.
- the machining state analysis unit uses at least the information about the workpiece, the information about the tool, and the machine information about the first NC machine tool, and calculates the first machining time by a simulation method that virtually executes the NC program. And the high load machining rate can be estimated.
- the present invention a motor information input unit for inputting the rated output of the first spindle motor provided in the first NC machine tool and the rated output of the second spindle motor provided in the second NC machine tool; a machining time input unit for inputting, as a first machining time, a machining time when the work is machined by the first NC machine tool using an NC program created for machining a predetermined work; A high-load machining ratio input unit for inputting a high-load machining ratio, which is a ratio of high-load machining time that is executed in a high-load state of a predetermined or higher load with respect to the rated output of the first spindle motor, in the first machining time.
- a machining time estimating unit for estimating a second machining time when the workpiece is machined by the second NC machine tool by changing the NC program to the same high load condition as As a display unit that displays the second machining time estimated by the machining time estimation unit, It relates to a computer program for operating a computer.
- the machining time estimator assumes that the first machining time is T 1 , the high-load machining ratio is R, the rated output of the first spindle motor is MP 1 , and the rated output of the second spindle motor is MP 2 .
- the present invention also relates to a computer-readable recording medium on which the above computer program is written.
- the second NC machine tool when a first NC machine tool is used as existing equipment and a second NC machine tool is used as equipment to be renewed, when the same workpiece is machined by this second NC machine tool to be renewed, the second The second machining time assumed when machining is performed under the condition that the load state for the rated output of the spindle motor is the same high load state as the high load state in the first NC machine tool, that is, according to the performance of the second NC machine tool Since the shortened second machining time can be estimated, it is possible to easily recognize the effect that can be obtained when the existing first NC machine tool is replaced with the second NC machine tool.
- the second machining time can be estimated without creating a new NC program improved according to the performance of the second NC machine tool to be updated, the existing first NC machine tool can be changed to the second NC machine tool. It is possible to easily and quickly recognize the effect that can be obtained by updating.
- FIG. 1 The machining time estimating device 1 of the present example uses an NC program created for machining a predetermined work, a first machining time when the work is machined by the first NC machine tool, and the first NC machine tool Based on the rated output of the provided first spindle motor, etc., a second machining time required when machining the workpiece is estimated using a second NC machine tool equipped with a second spindle motor having a different rated output.
- the NC program is changed under the condition that the load condition with respect to the rated output of the second spindle motor is the same high load condition as the high load condition of the first NC machine tool. and a device for estimating a second machining time when the workpiece is machined.
- the machining time estimating device 1 is composed of a motor information input unit 3, a machining time input unit 4, a high load machining ratio input unit 5, and a machining time estimating unit 6. It is composed of a device 2 and a touch panel 7 as an input/output device.
- the computing device 2 is composed of a computer including a CPU, a RAM, a ROM, etc., and its functions are realized by a computer program to execute processing described later. Further, the computing device 2 and the touch panel 7 are embodied as a tablet personal computer (tablet PC).
- the above computer program can be stored in a computer-readable recording medium as appropriate.
- the motor information input unit 3, the machining time input unit 4, and the high-load machining ratio input unit 5 each display an input/output screen as shown in FIG.
- Data relating to the rated output of the first spindle motor and data relating to the rated output of the second spindle motor, which are input from the output screen, are input to the machining time estimating section 6 .
- the machining time input unit 4 inputs data relating to the first machining time input from the input/output screen to the machining time estimation unit 6, and the high load machining ratio input unit 5 similarly inputs the input/output screen to the machining time estimating section 6.
- FIG. A box is an input box for inputting a numerical value, and by an operator inputting a numerical value in each box, respective data are input to the motor information input section 3, the machining time input section 4, and the high load machining ratio input section 5. is input to the machining time estimating unit 6 via the .
- An estimation process start signal is input to the machining time estimating section 6 by pressing the "execute" key displayed to the right of "second machining time estimation".
- first spindle motor rated output and “second spindle motor rated output” are input from the maker of the first NC machine tool and the maker of the second NC machine tool.
- the high load means that the output of the spindle motor is at a load equal to or greater than a predetermined percentage of its rated output.
- a high load can be defined as a case where the output of the spindle motor is 100% of the rated output, which means limit machining.
- the high-load machining ratio means the ratio of the machining time in which the spindle motor output during machining is the high load with respect to the entire machining time. From this definition, the high load machining rate when machining the work using the first NC machine tool is a high load state with respect to the rated output of the first spindle motor within the first machining time. It is the ratio of the machining time that has been reduced.
- the first machining time and the high-load machining ratio can be obtained from actual data when the workpiece is machined using the first NC machine tool.
- the first NC machine tool is equipped with a monitoring system that monitors operating conditions
- the first machining time and the machining time under high load conditions can be obtained from the data obtained by this monitoring system.
- manually measure the first machining time and monitor the load state of the first spindle motor during machining to determine the first machining time and the High load machining ratio can be acquired.
- the machining time estimating unit 6 receives an estimation process start signal from the touch panel 7, and after receiving the signal, calculates the second machining time T2 of the first spindle motor input from the motor information input unit 3. Data related to the rated output and the rated output of the second spindle motor, the first machining time input from the machining time input unit 4, and the high load machining ratio input from the high load machining ratio input unit 5 Based on the data, a second machining time is estimated when the workpiece is machined using a second NC machine tool having performance different from that of the first NC machine tool. In this second machining time, the NC program is changed so that the load condition with respect to the rated output of the second spindle motor becomes the same high load condition as the high load condition in the first NC machine tool. It is the machining time when it is assumed that the work is machined by a machine.
- the machining time estimator 6 sets the first machining time T 1 , the high-load machining ratio R, the rated output of the first spindle motor MP 1 , the rated output of the second spindle motor is MP2, the second machining time T2 is estimated by the following formula .
- T 2 ((T 1 ⁇ (T 1 ⁇ R))+(T 1 ⁇ R) ⁇ (MP 1 /MP 2 )
- T HL1 T 1 ⁇ R
- This high-load machining time THL2 is determined by changing the NC program so that the load condition with respect to the rated output of the second spindle motor becomes the same high-load condition as the high-load condition of the first NC machine tool. This is the machining time in a high-load state assuming that the workpiece is machined by a machine. Therefore, in this estimation, the NC program is unchanged.
- the machining time T_LL1 T 1 -(T 1 ⁇ R) Therefore, the second machining time T2 is estimated (approximated) by the above formula.
- the machining time estimator 6 displays the second machining time T2 estimated as described above in the box to the right of "estimated second machining time" displayed on the touch panel 7. do.
- the operator inputs data related to the rated output of the first spindle motor, the rated output of the second spindle motor, the data relating to the rated output of the second spindle motor, the first Data relating to the machining time and data relating to the high-load machining ratio are input.
- the machining time estimator 6 causes the second NC machine tool to machine the workpiece.
- the NC program is changed to the condition that the load state with respect to the rated output of the second spindle motor is the same high load state as the high load state in the first NC machine tool.
- a second machining time is estimated when the work is machined by the 2NC machine tool, and the estimated second machining time is displayed on the touch panel 7 .
- the first NC machine tool is assumed to be existing equipment, and the second NC machine tool is assumed to be equipment to be renewed, and the same work can be processed by this second NC machine tool to be renewed.
- the second machining time assumed when machining is performed under the condition that the load state with respect to the rated output of the second spindle motor is the same high load state as the high load state in the first NC machine tool, that is, Since the shortened second machining time is estimated according to the performance of the second NC machine tool, the user can easily recognize the effect that can be obtained when the existing first NC machine tool is replaced with the second NC machine tool. can do.
- the second machining time can be estimated without creating a new NC program that is improved according to the performance of the second NC machine tool to be updated, the user can change the existing first NC machine tool to the second machining time. It is possible to easily and quickly recognize the effect that can be obtained by updating to a 2NC machine tool.
- the data relating to the rated output of the first spindle motor, the data relating to the rated output of the second spindle motor, the data relating to the first machining time, and the data relating to the high load machining rate are Since it is possible to input from the touch panel 7, each data can be easily input, and since the estimated second processing time is displayed on the touch panel 7, the second processing time can be easily confirmed ( recognition).
- FIG. 1 The processing time estimating device 10 of this example includes a second computing device 11 in addition to the computing device 2 and the touch panel 7 described above.
- the second arithmetic unit 11 is composed of an NC program storage unit 12, a machining information storage unit 13 and a machining state analysis unit 14.
- the second arithmetic unit 11 is also composed of a computer including a CPU, a RAM, a ROM, etc.
- the function of the machining state analysis unit 14 is realized by a computer program, and executes processing to be described later.
- the NC program storage unit 12 and the machining information storage unit 13 are configured by appropriate storage media such as RAM.
- the second computing device 11 can be embodied as a tablet personal computer (tablet PC) together with the computing device 2 and the touch panel 7 .
- the above computer program can be stored in a computer-readable recording medium as appropriate.
- the NC program storage unit 12 is a functional unit that stores NC programs used in NC machine tools, and in this example, stores NC programs for machining the work by the first NC machine tool.
- the machining information storage unit 13 stores information on the work (for example, information on material dimensions and information on material), information on tools (e.g., specific cutting resistance to material), and information on the first NC machine tool It is a functional unit that stores such machine information (for example, the rated output of the first spindle motor and the machine efficiency coefficient).
- the machining state analysis unit 14 analyzes the NC program stored in the NC program storage unit 12, executes the NC program with the first NC machine tool, and performs the first machining when machining the workpiece. A process of estimating the time and the high-load machining ratio is performed.
- the machining state analysis unit 14 analyzes an NC program composed of a plurality of blocks written in NC language for each block, and recognizes the tool path, the spindle speed, and the feed amount (feed rate). The first machining time is estimated from these. In addition, the machining state analysis unit 14 stores the recognized tool path, spindle rotation speed, feed rate (feed rate), workpiece dimensions, workpiece material, and ratio of tool to workpiece material stored in the machining information storage unit 13. A high-load machining ratio is estimated from the cutting force, the rated output of the first spindle motor of the first NC machine tool, the machine efficiency coefficient, and the like.
- the machining state analysis unit 14 inputs the estimated first machining time to the machining time estimation unit 6 via the machining time input unit 4, and inputs the estimated high load machining ratio to the high load machining ratio input unit. 5 to the machining time estimator 6 .
- a workpiece W indicated by a solid line is processed by a tool T into a shape indicated by a dashed line (hatched shape).
- the machining state analysis unit 14 analyzes the NC program for each block and recognizes the tool paths shown in FIGS.
- the specific toolpath recognized in this example is that roughing is P 1 ⁇ P 2 ⁇ P 3 ⁇ P 4 ⁇ P 5 ⁇ P 6 ⁇ P 7 ⁇ P 8 ⁇ P 9 ⁇ P 10 ⁇ P 11 ⁇ P 12 ⁇ P 13 ⁇ P 14 ⁇ P 1
- the finishing process is P 1 ⁇ P 15 ⁇ P 16 ⁇ P 17 ⁇ P 1 .
- the dashed arrow indicates a rapid feed path
- the dotted arrow indicates a cutting feed path.
- the machining state analysis unit 14 estimates the travel time of the tool T in each pass from the distance and feed rate in each pass, integrates the estimated travel times, and estimates the first machining time.
- the machining state analysis unit 14 estimates the load MP [kW] in the first spindle motor for the cutting feed pass among the passes according to the following formula.
- MP f ⁇ Vc ⁇ D ⁇ Kc/(60 ⁇ 10 3 ⁇ ) where f is the feed rate per revolution [mm/rev], Vc is the cutting speed [m/min], D is the machining diameter [mm], Kc is the cutting resistance [MPa], and ⁇ is the machine efficiency coefficient.
- the feed amount f [mm/rev] and the cutting speed Vc [m/min] can be obtained by analyzing the NC program, and the machining diameter D [mm] can be obtained by analyzing the NC program or processing information storage unit 13, and the cutting resistance Kc [MPa] and the mechanical efficiency coefficient ⁇ can be obtained from the data stored in the machining information storage unit 13.
- the machining state analysis unit 14 calculates the percentage of the rated output of the load MP [kW] in the first spindle motor, and the calculated percentage exceeds a predetermined percentage (for example, 80%).
- the high-load machining time is calculated by adding up the machining times of the passes. For example, in the examples shown in FIGS. 5 to 9, P 4 ⁇ P 5 , P 8 ⁇ P 9 , and P 12 ⁇ P 13 are passes related to high-load machining.
- the machining state analysis unit 14 inputs the calculated first machining time to the machining time estimating unit 6 via the machining time input unit 4, and inputs the calculated high load machining ratio to the high load machining ratio input. It is input to the machining time estimating section 6 via the section 5 .
- the operator inputs data relating to the rated output of the first spindle motor and the rated output of the second spindle motor via the touch panel 7.
- the NC program is analyzed by the machining state analysis unit 14, and the first machining time and the high load machining ratio are calculated.
- the calculated first machining time is input to the machining time estimation unit 6 via the machining time input unit 4, and the calculated high load machining ratio is input to the high load machining ratio input unit 5 Machining time estimation It is input to part 6.
- the machining time estimating unit 6 performs the above-described The second machining time is estimated, and the estimated second machining time is displayed on the touch panel 7 .
- the machining state analysis unit 14 can calculate the first machining time and the high-load machining ratio. Even if there is no monitoring system for monitoring, the first machining time and the high-load machining rate can be obtained without manual work, and in this sense, the second machining time can be easily and quickly estimated. be able to.
- the machining state analysis unit 14 analyzes the NC program to calculate the first machining time and the high-load machining ratio. Instead, the machining state analysis unit 14 uses at least the information related to the work, the information related to the tool, and the machine information related to the first NC machine tool, and uses a simulation method to virtually execute the NC program. It may be configured to estimate the machining time and the high-load machining rate.
- the rated output of the first spindle motor is input from the touch panel 7 by the operator.
- Data related to the rated output of the first spindle motor may be input from the machining state analysis unit 14 to the machining time estimation unit 6 via the motor information input unit 3 .
- the second arithmetic unit 11 may be configured by a computer different from the arithmetic unit 2.
- Machining time estimating device 2 Arithmetic device 3 Motor information input unit 4 Machining time input unit 5 High load machining ratio input unit 6 Machining time estimating unit 7 Touch panel 10 Machining time estimating device 11 Second computing device 12 NC program storage unit 13 Machining information Storage unit 14 Machining state analysis unit
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Abstract
Description
所定のワークを加工するために作成されたNCプログラムを用いて、第1NC工作機械により前記ワークを加工したときの加工時間を第1加工時間として取得するとともに、該第1加工時間の内、前記第1NC工作機械に設けられる第1主軸モータの定格出力に対して、所定以上の高負荷状態で実行される高負荷加工時間の割合である高負荷加工割合を取得し、
取得された前記第1加工時間、前記高負荷加工割合、前記第1主軸モータの定格出力、及び第2NC工作機械に設けられる第2主軸モータの定格出力に基づき、前記第2NC工作機械により前記ワークを加工したときの加工時間であって、前記第2主軸モータの定格出力に対する負荷状態が、前記第1NC工作機械における高負荷状態と同じ高負荷状態となる条件に、前記NCプログラムを変更して前記第2NC工作機械により前記ワークを加工したときの第2加工時間を推定するようにした加工時間推定方法に係る。
第1NC工作機械に設けられる第1主軸モータの定格出力、及び第2NC工作機械に設けられる第2主軸モータの定格出力を入力するモータ情報入力部と、
所定のワークを加工するために作成されたNCプログラムを用いて、前記第1NC工作機械により前記ワークを加工したときの加工時間を第1加工時間として入力する加工時間入力部と、
前記第1加工時間の内、前記第1主軸モータの定格出力に対して所定以上の高負荷状態で実行される高負荷加工時間の割合である高負荷加工割合を入力する高負荷加工割合入力部と、
前記モータ情報入力部から入力された第1主軸モータの定格出力及び第2主軸モータの定格出力、前記加工時間入力部から入力された第1加工時間、並びに前記高負荷加工割合入力部から入力された高負荷加工割合を基に、前記第2NC工作機械により前記ワークを加工したときの加工時間であって、前記第2主軸モータの定格出力に対する負荷状態が、前記第1NC工作機械における高負荷状態と同じ高負荷状態となる条件に、前記NCプログラムを変更して前記第2NC工作機械により前記ワークを加工したときの第2加工時間を推定する加工時間推定部とを備えた加工時間推定装置に係る。
T2=((T1-(T1×R))+(T1×R)×(MP1/MP2)
前記モータ情報入力部、前記加工時間入力部及び高負荷加工割合入力部は、前記タッチパネルを介してそれぞれ情報を入力するように構成され、
前記加工時間推定部は、推定した前記第2加工時間を前記タッチパネルに表示するように構成された態様を採ることができる。
前記加工状態解析部は、推定した前記第1加工時間を前記加工時間入力部に入力し、前記高負荷加工割合を前記高負荷加工割合入力部に入力するように構成される。
MP=f×Vc×D×Kc/(60×103×η)
但し、fは1回転当たりの送り量[mm/rev]、Vcは切削速度[m/min]、Dは加工径[mm]、Kcは被切削抵抗[MPa]、ηは機械効率係数である。
第1NC工作機械に設けられる第1主軸モータの定格出力、及び第2NC工作機械に設けられる第2主軸モータの定格出力を入力するモータ情報入力部と、
所定のワークを加工するために作成されたNCプログラムを用いて、前記第1NC工作機械により前記ワークを加工したときの加工時間を第1加工時間として入力する加工時間入力部と、
前記第1加工時間の内、前記第1主軸モータの定格出力に対して所定以上の高負荷状態で実行される高負荷加工時間の割合である高負荷加工割合を入力する高負荷加工割合入力部と、
前記モータ情報入力部から入力された第1主軸モータの定格出力及び第2主軸モータの定格出力、前記加工時間入力部から入力された第1加工時間、並びに前記高負荷加工割合入力部から入力された高負荷加工割合を基に、前記第2NC工作機械により前記ワークを加工したときの加工時間であって、前記第2主軸モータの定格出力に対する負荷状態が、前記第1NC工作機械における高負荷状態と同じ高負荷状態となる条件に、前記NCプログラムを変更して前記第2NC工作機械により前記ワークを加工したときの第2加工時間を推定する加工時間推定部と、
前記加工時間推定部により推定された第2加工時間を表示する表示部として、
コンピュータを機能させるためのコンピュータプログラムに係る。
T2=((T1-(T1×R))+(T1×R)×(MP1/MP2)
まず、第1の実施形態に係る加工時間推定装置について、図1及び図2に基づいて説明する。本例の加工時間推定装置1は、所定のワークを加工するために作成されたNCプログラムを用いて、第1NC工作機械により前記ワークを加工したときの第1加工時間、及び第1NC工作機械に設けられる第1主軸モータの定格出力などに基づいて、これとは定格出力の異なる第2主軸モータを備えた第2NC工作機械を用いて、前記ワークを加工したときに要する第2加工時間を推定する装置であり、より詳しくは、前記第2主軸モータの定格出力に対する負荷状態が、第1NC工作機械における高負荷状態と同じ高負荷状態となる条件に、前記NCプログラムを変更したと仮定して、前記ワークを加工したときの第2加工時間を推定する装置である。
T2=((T1-(T1×R))+(T1×R)×(MP1/MP2)
THL1=T1×R
THL2=THL1(=T1×R)×(MP1/MP2)
尚、この高負荷加工時間THL2は、第2主軸モータの定格出力に対する負荷状態が、第1NC工作機械における高負荷状態と同じ高負荷状態となる条件に、NCプログラムを変更して第2NC工作機械によりワークを加工したと仮定したときの、高負荷状態における加工時間である。したがって、この推定において、NCプログラムは変更されていない。
TLL1=T1-(T1×R)
したがって、前記第2加工時間T2は、上記計算式によって推定(近似)される。
次に、本発明の第2の実施形態について、図3から図9に基づいて説明する。本例の加工時間推定装置10は、上述した演算装置2及びタッチパネル7に加えて、第2演算装置11を備えるものである。
MP=f×Vc×D×Kc/(60×103×η)
但し、fは1回転当たりの送り量[mm/rev]、Vcは切削速度[m/min]、Dは加工径[mm]、Kcは被切削抵抗[MPa]、ηは機械効率係数である。
尚、送り量f[mm/rev]及び切削速度Vc[m/min]はNCプログラムを解析することによって取得することができ、加工径D[mm]は、NCプログラムの解析または加工情報記憶部13に格納されたデータから取得することができ、また、被切削抵抗Kc[MPa]、及び機械効率係数ηは加工情報記憶部13に格納されたデータから取得することができる。
2 演算装置
3 モータ情報入力部
4 加工時間入力部
5 高負荷加工割合入力部
6 加工時間推定部
7 タッチパネル
10 加工時間推定装置
11 第2演算装置
12 NCプログラム記憶部
13 加工情報記憶部
14 加工状態解析部
Claims (9)
- 所定のワークを加工するために作成されたNCプログラムを用いて、第1NC工作機械により前記ワークを加工したときの加工時間を第1加工時間として取得するとともに、該第1加工時間の内、前記第1NC工作機械に設けられる第1主軸モータの定格出力に対して、所定以上の高負荷状態で実行される高負荷加工時間の割合である高負荷加工割合を取得し、
取得された前記第1加工時間、前記高負荷加工割合、前記第1主軸モータの定格出力、及び第2NC工作機械に設けられる第2主軸モータの定格出力に基づき、前記第2NC工作機械により前記ワークを加工したときの加工時間であって、前記第2主軸モータの定格出力に対する負荷状態が、前記第1NC工作機械における高負荷状態と同じ高負荷状態となる条件に、前記NCプログラムを変更して前記第2NC工作機械により前記ワークを加工したときの第2加工時間を推定するようにしたことを特徴とする加工時間推定方法。 - 前記第1加工時間をT1、前記高負荷加工割合をR、前記第1主軸モータの定格出力をMP1、前記第2主軸モータの定格出力をMP2として、前記第2加工時間T2を以下の計算式によって推定することを特徴とする請求項1記載の加工時間推定方法。
T2=((T1-(T1×R))+(T1×R)×(MP1/MP2) - 第1NC工作機械に設けられる第1主軸モータの定格出力、及び第2NC工作機械に設けられる第2主軸モータの定格出力を入力するモータ情報入力部と、
所定のワークを加工するために作成されたNCプログラムを用いて、前記第1NC工作機械により前記ワークを加工したときの加工時間を第1加工時間として入力する加工時間入力部と、
前記第1加工時間の内、前記第1主軸モータの定格出力に対して所定以上の高負荷状態で実行される高負荷加工時間の割合である高負荷加工割合を入力する高負荷加工割合入力部と、
前記モータ情報入力部から入力された第1主軸モータの定格出力及び第2主軸モータの定格出力、前記加工時間入力部から入力された第1加工時間、並びに前記高負荷加工割合入力部から入力された高負荷加工割合を基に、前記第2NC工作機械により前記ワークを加工したときの加工時間であって、前記第2主軸モータの定格出力に対する負荷状態が、前記第1NC工作機械における高負荷状態と同じ高負荷状態となる条件に、前記NCプログラムを変更して前記第2NC工作機械により前記ワークを加工したときの第2加工時間を推定する加工時間推定部とを備えていることを特徴とする加工時間推定装置。 - データを入力する機能、及びデータを表示する機能を有するタッチパネルを備え、
前記モータ情報入力部、前記加工時間入力部及び高負荷加工割合入力部は、前記タッチパネルを介してそれぞれ情報を入力するように構成され、
前記加工時間推定部は、推定した前記第2加工時間を前記タッチパネルに表示するように構成されていることを特徴とする請求項3記載の加工時間推定装置。 - 少なくとも、前記ワークに係る情報、工具に係る情報及び第1NC工作機械に係る機械情報を用い、前記ワークを加工するために作成されたNCプログラムを実行して前記第1NC工作機械により加工したときの前記第1加工時間、及び前記高負荷加工割合を推定する加工状態解析部を備え、
前記加工状態解析部は、推定した前記第1加工時間を前記加工時間入力部に入力し、前記高負荷加工割合を前記高負荷加工割合入力部に入力するように構成されていることを特徴とする請求項3又は4記載の加工時間推定装置。 - 前記加工時間推定部は、前記第1加工時間をT1、前記高負荷加工割合をR、前記第1主軸モータの定格出力をMP1、前記第2主軸モータの定格出力をMP2として、前記第2加工時間T2を以下の計算式によって推定するように構成されていることを特徴とする請求項3から5のいずれか1項に記載の加工時間推定装置。
T2=((T1-(T1×R))+(T1×R)×(MP1/MP2) - 第1NC工作機械に設けられる第1主軸モータの定格出力、及び第2NC工作機械に設けられる第2主軸モータの定格出力を入力するモータ情報入力部と、
所定のワークを加工するために作成されたNCプログラムを用いて、前記第1NC工作機械により前記ワークを加工したときの加工時間を第1加工時間として入力する加工時間入力部と、
前記第1加工時間の内、前記第1主軸モータの定格出力に対して所定以上の高負荷状態で実行される高負荷加工時間の割合である高負荷加工割合を入力する高負荷加工割合入力部と、
前記モータ情報入力部から入力された第1主軸モータの定格出力及び第2主軸モータの定格出力、前記加工時間入力部から入力された第1加工時間、並びに前記高負荷加工割合入力部から入力された高負荷加工割合を基に、前記第2NC工作機械により前記ワークを加工したときの加工時間であって、前記第2主軸モータの定格出力に対する負荷状態が、前記第1NC工作機械における高負荷状態と同じ高負荷状態となる条件に、前記NCプログラムを変更して前記第2NC工作機械により前記ワークを加工したときの第2加工時間を推定する加工時間推定部と、
前記加工時間推定部により推定された第2加工時間を表示する表示部として、
コンピュータを機能させるためのコンピュータプログラム。 - 前記加工時間推定部は、前記第1加工時間をT1、前記高負荷加工割合をR、前記第1主軸モータの定格出力をMP1、前記第2主軸モータの定格出力をMP2として、前記第2加工時間T2を以下の計算式によって推定するように構成されていることを特徴とする請求項7記載のコンピュータプログラム。
T2=((T1-(T1×R))+(T1×R)×(MP1/MP2) - 請求項7又は8記載のコンピュータプログラムを記載したコンピュータ読み取り可能な記録媒体。
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JP2017146859A (ja) * | 2016-02-18 | 2017-08-24 | ファナック株式会社 | 数値制御工作機械の加工時間予測装置 |
JP2020024676A (ja) * | 2018-06-14 | 2020-02-13 | サンドビック マシニング ソリューションズ アクティエボラーグ | データベースから選択された方針に基づく機械加工 |
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US5663894A (en) * | 1995-09-06 | 1997-09-02 | Ford Global Technologies, Inc. | System and method for machining process characterization using mechanical signature analysis |
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JP2003175439A (ja) | 2001-12-11 | 2003-06-24 | Mori Seiki Co Ltd | Nc工作機械の加工時間推定装置 |
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