JP2017220213A - Machining load analysis device, machining load analysis program, and machining load analysis system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machining load analysis device, a machining load analysis program and a machining load analysis system capable of easily optimizing machining load.SOLUTION: A simulation unit 22 changes feeding speed of a cutting tool 11 described in an NC program so that machining load which has not reached desired target load in data with the lapse of time on machining load gets closer to the target load.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a machining load analysis device, a machining load analysis program, and a machining load analysis system.

  Conventionally, in order to cut a workpiece to a desired shape, cutting using a rotating cutting tool has been performed.

  In patent document 1, after estimating the processing load concerning a cutting tool based on the data regarding the shape of a workpiece, the material of a workpiece, the shape of a cutting tool, and cutting conditions, processing load is adjusted by adjusting cutting conditions. An optimization method has been proposed.

Japanese Patent No. 5204934

  However, since it is often difficult to acquire data relating to the shape of the workpiece, the material of the workpiece, the shape of the cutting tool, the cutting conditions, and the like, it is not easy to execute the method of Patent Document 1.

  The present invention has been made in view of the above situation, and an object thereof is to provide a machining load analysis device, a machining load analysis program, and a machining load analysis system that can easily optimize a machining load.

  The processing load analysis device according to the first aspect of the present invention includes an acquisition unit and a simulation unit. The acquisition unit acquires time-dependent data of a processing load when a workpiece is cut using a cutting tool according to the NC program. The simulation unit changes the feed rate of the cutting tool described in the NC program so that the machining load that has not reached the desired target load in the time-lapse data approaches the target load.

  According to the machining load analysis device according to the first aspect of the present invention, the simulation unit can analyze the machining load over time without using the shape of the workpiece, the material of the workpiece, the shape of the cutting tool, the cutting conditions, and the like. It is possible to optimize the processing load simply by using only.

  The machining load analysis apparatus according to the second aspect of the present invention relates to the first aspect, and the simulation unit changes the feed speed so that the changed feed speed does not exceed the upper limit set for the cutting tool.

  According to the machining load analyzing apparatus according to the second aspect of the present invention, it is possible to suppress an excessively large load from being applied to the cutting tool and shortening the tool life.

  The machining load analysis apparatus according to the third aspect of the present invention relates to the first or second aspect, wherein the simulation unit divides each G code described in the NC program into a plurality of small sections, and each of the plurality of small processes. Change the feed speed to.

  According to the machining load analyzing apparatus according to the third aspect of the present invention, since the feed rate can be finely adjusted for each small section, the NC program can be changed so that the cutting process can be completed in a shorter time.

  The machining load analysis apparatus according to the fourth aspect of the present invention relates to any one of the first to third aspects, and the simulation unit is configured to make NC so that the machining load exceeding the target load in the time-lapse data approaches the target load. Change the feed rate of the cutting tool described in the program.

  According to the machining load analyzing apparatus according to the fourth aspect of the present invention, since the large machining load detected instantaneously by acceleration / deceleration of the spindle speed of the cutting tool can be reduced, the cutting tool is bent. Can be suppressed.

  A machining load analysis apparatus according to a fifth aspect of the present invention relates to any one of the first to fourth aspects, and the simulation unit repeats a vertical movement of a predetermined number of times or more within a predetermined period in the time-lapse data. In this case, the feed rate of the cutting tool described in the NC program is changed so that the machining load approaches the moving average value of the machining load within a predetermined period.

  According to the machining load analysis apparatus according to the fifth aspect of the present invention, since the vertical movement of the feed rate of the cutting tool is suppressed, it is possible to suppress the load on the workpiece and the cutting tool.

  A machining load analysis program according to a sixth aspect of the present invention is a program used in an electronic device for analyzing a machining load when a workpiece is cut with a cutting tool in accordance with an NC program, the computer loading the machining A step of acquiring load time-dependent data, and a step of changing the feed rate of the cutting tool described in the NC program so that a machining load that does not reach a desired target load in the time-lapse data approaches the target load And execute.

  According to the machining load analysis program according to the sixth aspect of the present invention, only the time data of the machining load is used without using the shape of the workpiece, the material of the workpiece, the shape of the cutting tool, the cutting conditions, and the like. The processing load can be easily optimized.

  The machining load analysis system according to the seventh aspect of the present invention includes an acquisition unit and a simulation unit. The acquisition unit acquires time-dependent data of a processing load when a workpiece is cut using a cutting tool according to the NC program. The simulation unit changes the feed rate of the cutting tool described in the NC program so that the machining load that has not reached the desired target load in the time-lapse data approaches the target load.

  According to the machining load analysis system according to the seventh aspect of the present invention, the simulation unit performs processing load time-dependent data without using the shape of the workpiece, the material of the workpiece, the shape of the cutting tool, the cutting conditions, and the like. It is possible to optimize the processing load simply by using only.

  According to the present invention, it is possible to provide a machining load analysis device, a machining load analysis program, and a machining load analysis system that can easily optimize a machining load.

The block diagram which shows the structure of the processing load analysis system which concerns on embodiment Image diagram of acquisition data acquired by acquisition unit according to embodiment Display example of simulation result according to the embodiment (standard pattern) Display example of simulation result (division pattern) according to the embodiment Display example of simulation result according to the embodiment (target load exceeding constant pattern) Display example of simulation result (smoothing pattern) according to the embodiment The block diagram which shows the structure of the processing load analysis system which concerns on other embodiment.

(Configuration of machining load analysis system 1)
A configuration of the machining load analysis system 1 according to the present embodiment will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of the machining load analysis system 1.

  The machining load analysis system 1 includes a machine tool 10, a machining load analysis device 20, a display device 30, an input device 40, and a storage medium 50.

(1) Machine tool 10
The machine tool 10 performs cutting of a workpiece (hereinafter referred to as “workpiece”) using a cutting tool 11 in accordance with an NC (Numerical Control) program. The cutting tool 11 is, for example, a milling cutter, a drill, a boring, and a tap, but is not limited thereto. In the present embodiment, it is assumed that the cutting tool 11 is a milling cutter.

  The machine tool 10 outputs operation data of the machine tool 10, type data of the cutting tool 11, tip coordinate data of the cutting tool 11, feed speed data of the cutting tool 11, processing load data, and NC program related data. The machine tool 10 may upload these data to a server on the Internet.

  The operation data of the machine tool 10 indicates whether it is a fast feed state such as a table, a processing state by the cutting tool 11, or a stop state. The type data of the cutting tool 11 indicates the tool number of the cutting tool 11. The tip coordinate data of the cutting tool 11 indicates coordinate values (X, Y) of the tip portion of the cutting tool 11. The feed rate data of the cutting tool 11 indicates an actual measurement value of the feed rate of the cutting tool 11.

  The machining load data includes time-dependent data of the machining load when cutting is performed. The load data of the spindle motor of the cutting tool 11, the current value, the voltage value and the power value, the load meter of the spindle motor of the cutting tool 11, the current value, the voltage value and the power value, and the cutting tool 11 Load meter of table feed axis motor, current value, voltage value and power value, load meter of spindle motor of cutting tool 11, current value, voltage value and power value, spindle load of cutting tool 11, and cutting of cutting tool 11 Data of at least one of the torques is included.

  The NC program related data includes the main program number being executed, the program number being executed, the line number being executed, and the NC program body. The NC program main body includes a G code for processing axis movement and coordinate system setting in the machine tool 10. Each G code includes a target coordinate value (X, Y) and a feed speed (F code) when moving the cutting tool 11 toward the target coordinate value (X, Y).

(2) Processing load analysis device 20
The processing load analysis device 20 is a device for simulating a processing load suitable for the cutting tool 11 in order to increase the efficiency of cutting processing in the machine tool 10. The machining load analysis device 20 includes an acquisition unit 21, a simulation unit 22, and an output unit 23.

  The acquisition unit 21 acquires operation data of the machine tool 10, tip coordinate data of the cutting tool 11, feed speed data of the cutting tool 11, processing load data, and NC program related data. FIG. 2 is an image diagram of acquired data acquired by the acquiring unit 21. The acquisition unit 21 may download such information from a server on the Internet.

  The simulation unit 22 simulates a machining load suitable for the cutting tool 11 based on the acquisition data acquired by the acquisition unit 21. As shown in FIG. 3, the simulation unit 22 displays predetermined information on the display device 30 based on the acquired data.

  In the example shown in FIG. 3, in the original data display area R1, the machining load time graph, the tool number of the cutting tool 11, the type of machining load, the program number being executed, the line number being executed, and the G for each line number. The code is displayed. In FIG. 3, the cutting tool 11 is a milling cutter, and the machining load is the spindle load of the milling cutter.

  In the example shown in FIG. 3, in the simulation result display area R2, a time-dependent graph of a machining load subjected to a constant simulation described later and a G code changed accordingly are displayed. However, when the simulation unit 22 is not executing the stabilization simulation, nothing is displayed in the simulation result display area R2.

  In the example shown in FIG. 3, in the input area R3, an input box for a constant target value, a feed speed unit selection check field, an input box for a feed speed upper limit value, a G code division ON check field, and a G code division cutting distance input box. , A smoothing calculation ON check column, a selection check column for stabilizing the target load exceeding, a calculation execution button, an output folder input box, and an NC program output execution button after the change are displayed. Using the input device 40, the operator can input a desired value in each input box displayed in the input area R3 or select each check field. The input device 40 is, for example, a keyboard and a mouse. The change of the NC program by the simulation unit 22 will be described later.

  The output unit 23 outputs the NC program changed by the simulation unit 22 to the storage medium 50.

(3) Stabilization simulation by simulation unit 22 Various stabilization simulations executed by the simulation unit 22 in response to an input from an operator will be sequentially described with reference to FIGS. In the present embodiment, bringing the machining load applied to the cutting tool 11 closer to the target load is referred to as “stabilization”.

1. Standard Pattern A standard pattern for the stabilization simulation will be described with reference to FIG.

  In the input area R3, the operator inputs the target load into the input box for the constant target value. The simulation unit 22 displays a straight line indicating the target load on the temporal graph in the original data display area R1. In the example shown in FIG. 3, the target load is set to “45”.

  Next, the operator compares the time-dependent graph of the original data display area R1 with the target load, and selects a range in which the machining load does not reach the target load from among the G codes displayed in the original data display area R1. . The simulation unit 22 displays a range corresponding to the G code selected by the operator on the time-dependent graph. In FIG. 3, 16 G codes described in line numbers 868 to 884 are selected.

  Next, in the input area R3, the operator inputs a desired value in the input box for the feed speed upper limit value. The unit of the feed speed upper limit value can be selected from “value” and “magnification”. When “value” is selected, the simulation unit 22 sets the input value itself as the upper limit value of the feed speed. When “magnification” is selected, the simulation unit 22 sets the multiplication value of the original feed speed and the input value as the upper limit value of the feed speed. In FIG. 3, the feed speed upper limit value is set to 10 times the original feed speed.

  Next, the operator presses the calculation execution button in the input area R3. The simulation unit 22 increases the feed speed of the cutting tool 11 in each of the row numbers 868 to 884 so that the machining load that has not reached the target load approaches the target load. The simulation unit 22 rewrites the feeding speed in the G code described in each of the line numbers 868 to 884. However, the simulation part 22 adjusts so that the feed speed after a change may not exceed the feed speed upper limit set as mentioned above. The simulation unit 22 displays a constant graph of machining load over time and a G code with a rewritten feed rate in the simulation result display area R2. As shown in FIG. 3, the time-dependent graph of the processing load that has been made constant can complete the processing in a shorter time than the time-dependent graph of the original data.

  Next, in the input area R3, the operator inputs a desired folder in the input box of the output folder and presses the output execution button. The simulation unit 22 outputs the changed NC program including the G code whose feed rate has been changed to the output unit 23.

2. Dividing Pattern A dividing pattern of the stabilization simulation will be described with reference to FIG.

  The difference between the standard pattern and the division pattern described above is that the G code division ON check column is checked in the input area R3. In the following description, the difference will be mainly described.

  In the input area R3, the operator inputs the target load into the input box for the constant target value. The simulation unit 22 displays a straight line indicating the target load on the temporal graph in the original data display area R1.

  Next, the operator selects a range in which the machining load does not reach the target load from among the G codes displayed in the original data display area R1. The simulation unit 22 displays a range corresponding to the G code selected by the operator on the time-dependent graph. In FIG. 4, 16 G codes described in line numbers 868 to 884 are selected.

  Next, in the input area R3, the operator inputs a desired value in the input box for the feed speed upper limit value. The simulation unit 22 sets an upper limit value of the feed rate based on the input value.

  Next, the operator checks the G code division ON check column in the input area R3, and then inputs a desired value in the G code division cutting distance input box. The simulation unit 22 sets the G codes of line numbers 868 to 884 to be divided into a plurality of small sections according to the input value of the G code division cutting distance input box. In FIG. 4, “5 mm” is entered in the G code division cutting distance input box. Therefore, the simulation part 22 sets so that the moving distance of the front-end | tip part of the cutting tool 11 in each small section may be 5 mm.

  Next, the operator presses the calculation execution button in the input area R3. The simulation unit 22 divides the G code into a plurality of small sections so that the moving distance of the tip of the cutting tool 11 is every 5 mm in each of the row numbers 868 to 884, and the processing load is targeted in each small section. Increase the feed rate to approach the load. The simulation unit 22 rewrites the feeding speed of each G code of line numbers 868 to 884 for each small section. In FIG. 4, subdivisions of the G code at line number 869 and line number 870 are shown. As can be seen by comparing FIG. 3 and FIG. 4, the machining can be completed in a shorter time by dividing the G code into small sections and finely adjusting the feed rate.

  Next, the operator inputs a desired folder in the input folder of the output folder in the input area R3 and presses the output execution button. The simulation unit 22 outputs the changed NC program including the G code whose feed rate is changed for each subsection to the output unit 23.

3. Target Load Exceeding Constant Pattern The target load exceeding constant pattern of the stabilization simulation will be described with reference to FIG.

  The difference between the above-described standard pattern and the target load excess stabilization pattern is that “perform” is selected in the selection check column for target load excess stabilization in the input area R3. Therefore, in the following description, the difference will be mainly described.

  In the input area R3, the operator inputs the target load into the input box for the constant target value. The simulation unit 22 displays a straight line indicating the target load on the temporal graph in the original data display area R1.

  Next, the operator selects a range in which the machining load does not reach the target load from among the G codes displayed in the original data display area R1. The simulation unit 22 displays a range corresponding to the G code selected by the operator on the time-dependent graph. In FIG. 5, the G code described in line numbers 857 to 880 is selected.

  Next, in the input area R3, the operator inputs a desired value in the input box for the feed speed upper limit value. The simulation unit 22 sets an upper limit value of the feed rate based on the input value.

  Next, the operator selects “Perform” in the selection check column for making the target load exceeded constant in the input area R3. The simulation unit 22 sets the upper limit value of the machining load as the target load in all the processes that execute the stabilization simulation.

  Next, the operator presses the calculation execution button in the input area R3. The simulation unit 22 increases the feed speed of the cutting tool 11 so that the machining load that has not reached the target load approaches the target load, and the cutting tool so that the machining load exceeding the target load approaches the target load. 11 is slowed down. In the simulation result display area R2, the simulation unit 22 displays a constant graph of the machining load and a G code with a rewritten feed rate. In FIG. 5, the above-described division of the G code is also executed. As shown in FIG. 5, it is possible to suppress the bending of the cutting tool 11 by reducing the large processing load instantaneously detected by acceleration / deceleration of the spindle speed of the cutting tool 11 to the target load. . As a result, it is possible to suppress the formation of a step or a dent in the work.

4). Smoothing Pattern The smoothing pattern of the stabilization simulation will be described with reference to FIG.

  The difference between the standard pattern and the smoothing pattern described above is that the smoothing calculation ON check column is checked in the input area R3. Therefore, in the following description, the difference will be mainly described.

  In the input area R3, the operator inputs the target load into the input box for the constant target value. The simulation unit 22 displays a straight line indicating the target load on the temporal graph in the original data display area R1.

  Next, the operator selects a range in which the machining load does not reach the target load from among the G codes displayed in the original data display area R1. The simulation unit 22 displays a range corresponding to the G code selected by the operator on the time-dependent graph. In FIG. 6, the G code described in line numbers 857 to 880 is selected.

  Next, in the input area R3, the operator inputs a desired value in the input box for the feed speed upper limit value. The simulation unit 22 sets an upper limit value of the feed rate based on the input value.

  Next, after checking the smoothing calculation ON check column in the input area R3, the operator presses the calculation execution button in the input area R3. The simulation unit 22 increases the feed rate of the G code described in each line number so that the machining load that has not reached the target load approaches the target load. Further, the simulation unit 22 adjusts the feed rate of the G code described in each row number so that the machining load that repeats the vertical movement more than a predetermined number of times within a predetermined period becomes constant. For example, the simulation unit 22 adjusts the feed rate so that the machining load approaches the “moving average value” in a range where the machining load repeats up and down movements five times or more within one second. As shown in FIG. 6, the vertical movement of the machining load is suppressed in all processes where the stabilization simulation is executed. As a result, since it is not necessary to change the feed rate violently with the change of the NC program, it is possible to suppress the load on the workpiece and the cutting tool 11.

  Next, the operator inputs a desired folder in the input folder of the output folder in the input area R3 and presses the output execution button. The simulation unit 22 outputs the changed NC program including the G code whose feed rate has been changed to the output unit 23.

(Feature)
(1) In the standard pattern of the stabilization simulation, the simulation unit 22 uses the cutting tool 11 described in the NC program so that the machining load that does not reach the desired target load in the time-dependent data of the machining load approaches the target load. Change the feed rate.

  As described above, the simulation unit 22 simply optimizes the machining load using only the time-dependent data of the machining load without using the shape of the workpiece, the material of the workpiece, the shape of the cutting tool 11 and the cutting conditions. be able to.

  Further, when the machining load exceeding the target load in the time-lapse data is not adjusted, the feed rate is decreased in order to reduce the large machining load that is instantaneously detected by the acceleration / deceleration of the spindle speed of the cutting tool 11. Since it is not necessary, the NC program can be changed so that the cutting process can be completed in a shorter time.

  (2) In the standard pattern of the stabilization simulation, the simulation unit 22 changes the feed rate so that the changed feed rate does not exceed the upper limit set for the cutting tool 11. Accordingly, it is possible to suppress the tool life from being shortened due to an excessively large load applied to the cutting tool 11.

  (3) In the division pattern of the regularization simulation, the simulation unit 22 divides each G code described in the NC program into a plurality of small sections, and changes the feed speed for each small process.

  Thus, since the feed rate can be finely adjusted for each small section, the NC program can be changed so that the cutting process can be completed in a shorter time.

  (4) In the constant pattern exceeding the target load of the constant simulation, the simulation unit 22 uses the cutting tool described in the NC program so that the machining load exceeding the target load in the time-dependent data of the machining load approaches the target load. 11 feed speed is changed.

  Accordingly, since a large machining load that is instantaneously detected by acceleration / deceleration of the spindle rotation speed of the cutting tool 11 can be reduced, it is possible to suppress the bending of the cutting tool 11. As a result, it is possible to suppress the formation of a step or a dent in the work.

  (5) In the smoothing pattern of the regularization simulation, the simulation unit 22 repeats the vertical movement more than a predetermined number of times (for example, 5 times) within a predetermined period (for example, within 1 second) in the time-lapse data. In this case, the feed speed of the cutting tool 11 described in the NC program is changed so that the machining load during that time approaches the moving average value.

  Therefore, since the vertical movement of the feed speed of the cutting tool 11 is suppressed, it is possible to suppress the load on the workpiece and the cutting tool 11.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and various changes or modifications can be made without departing from the scope of the present invention.

  In the above embodiment, the simulation unit 22 sets the feed speed upper limit value in the stabilization simulation, but the feed speed upper limit value does not need to be set in any pattern. Whether or not to set the upper limit of the feed speed is left to the operator's selection.

  In the embodiment described above, the machining load analysis device 20 acquires the tip coordinate data of the cutting tool 11 from the machine tool 10, but is not limited thereto. When the division pattern for the stabilization simulation is not set, the simulation unit 22 does not use the tip coordinate data of the cutting tool 11.

  In the above embodiment, the configuration of the machining load analysis device 20 has been mainly described. However, the present invention may be provided as a program that causes a computer to execute each process performed by the machining load analysis device 20 as an electronic device. The program may be recorded on a computer-readable medium. If a computer-readable medium is used, a program can be installed in the computer. The computer readable medium may be a non-transitory recording medium. The non-transitory recording medium is not particularly limited, but may be a recording medium such as a CD-ROM or a DVD-ROM.

  In the machining load analysis system 1 according to the above embodiment, the machining load analysis device 20 includes the acquisition unit 21, but the invention is not limited thereto. The acquisition unit 21 may be arranged outside the processing load analysis device 20.

  For example, as in the machining load analysis system 1 a shown in FIG. 7, the data acquisition device 60 located at a location physically separated from the machining load analysis device 20 may have the acquisition unit 21.

  The data acquisition device 60 is connected to the machine tool 10 and the server 70 via network communication. The data acquisition device 60 acquires operation data, tip coordinate data of the cutting tool 11, feed speed data of the cutting tool 11, processing load data, and NC program related data from the machine tool 10. The data acquisition device 60 transmits these pieces of information to the server 70. As the data acquisition device 60, for example, a tablet computer can be used.

  The server 70 is connected to the data acquisition device 60 and the machining load analysis device 20 via network communication. The server 70 may be connected to the data acquisition device 60 via a portable high-speed communication technology (LTE) line. The server 70 stores the information acquired from the data acquisition device 60 and transmits the information acquired from the data acquisition device 60 to the processing load analysis device 20 in response to a request from the processing load analysis device 20.

  Even in such a machining load analysis system 1a, the simulation unit 22 simply uses the time data of the machining load without using the shape of the workpiece, the material of the workpiece, the shape of the cutting tool 11 and the cutting conditions, and the like. The processing load can be optimized.

DESCRIPTION OF SYMBOLS 1 Processing load analysis system 10 Machine tool 11 Cutting tool 20 Processing load analysis apparatus 21 Acquisition part 22 Simulation part 23 Output part 30 Display apparatus 40 Input device

Claims (7)

An acquisition unit for acquiring time-dependent data of a processing load when a workpiece is cut using a cutting tool according to the NC program;
A simulation unit that changes the feed rate of the cutting tool described in the NC program so that a machining load that does not reach a desired target load in the time-lapse data approaches the target load;
A processing load analysis device comprising: The simulation unit changes the feed rate so that the changed feed rate does not exceed the upper limit set for the cutting tool.
The processing load analysis apparatus according to claim 1. The simulation unit divides each G code described in the NC program into a plurality of small sections, and changes the feed speed for each of the plurality of small processes.
The processing load analysis device according to claim 1 or 2. The simulation unit changes the feed rate of the cutting tool described in the NC program so that the machining load that exceeds the target load in the time-lapse data approaches the target load.
The processing load analysis apparatus according to claim 1. The simulation unit, when the processing load in the time-lapse data repeats the vertical movement more than a predetermined number of times within a predetermined period, so that the processing load approaches the moving average value of the processing load within the predetermined period, Changing the feed rate of the cutting tool described in the NC program;
The machining load analysis device according to claim 1. A program used in an electronic device for analyzing a processing load when a workpiece is cut with a cutting tool according to an NC program,
Obtaining time-lapse data of the processing load;
Changing the feed rate of the cutting tool described in the NC program so that a machining load that does not reach a desired target load in the time-lapse data approaches the target load;
Machining load analysis program to execute. An acquisition unit for acquiring time-dependent data of a processing load when a workpiece is cut using a cutting tool according to the NC program;
A simulation unit that changes the feed rate of the cutting tool described in the NC program so that a machining load that does not reach a desired target load in the time-lapse data approaches the target load;
Machining load analysis system.

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