JP2010277261A - Machining simulation method and machining simulation support device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machining simulation method and machining simulation support device capable of further reducing processing time for calculating machining data including CL data and NC data, and processing time for calculating machining time based on a simulation using the machining data. <P>SOLUTION: The machining simulation method for reducing calculation time for calculation of the machining data by a machining data calculation means capable of calculating the machining data for machining a work with a machine tool through input of machining conditions includes a first step wherein simplified machining conditions with at least one parameter value included in the machining conditions changed from an actual parameter value used for actual machining to a simplified parameter value are input (S10) and the simplified parameter value is used to obtain simplified machining data in a shorter time period than when the actual parameter value is used, so as to reduce the machining data calculation time period when the machining data calculation means is used to calculate the machining data. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a machining simulation method and a machining simulation support device for obtaining NC data used in an NC device that controls a machine tool.

In recent years, various simulators have been put into practical use, and machining simulators using machine tools have also been put into practical use. For example, when a die is machined using a machine tool, a machining simulation is performed according to the following procedures (1) to (3), and the machining time required for machining with an actual machine tool can be known.
(1) Necessary machining conditions are input to machining data calculation means (such as a CAD / CAM device) that can calculate machining data used in an NC device that controls a machine tool.
(2) The machining data calculation means calculates machining data.
(3) The obtained machining data is input to the simulator, and the machining time required for machining performed using the machining data is calculated.
This makes it possible to prepare machining data that satisfies the target machining time without machining with an actual machine tool, which is very convenient.
However, the time required to know the processing time is a problem.
For example, in the processing of a mold, the operator inputs the above (1), and in the case of a normal mold, it can be input in a time of about 10 minutes. However, the calculation of machining data by the machining data calculation means (2) takes about 10 [hours], and the calculation of machining time by the simulation means (3) takes about 2 [hours]. Is needed.
In other words, since it takes a long time of about 12 [hours] from when the operator inputs the machining conditions to know the machining time until the machining time can be known, the result can be obtained even if the machining conditions are entered. It will be the next day. In addition, when the obtained result (machining time) does not satisfy the target machining time, it is changed to a new machining condition and recalculated, and the result is obtained again on the next day. If a total of five calculations are performed until a machining condition that satisfies the target machining time is found, a result can be obtained on the sixth day including the start date.
Thus, since it takes a long time to obtain desired machining data, it is desired to shorten the processing time.
For example, in the prior art described in Patent Document 1, in creating a simulation model of a manufacturing process, a detailed simulation model is divided into a plurality of groups, and each of the processing machines constituting the divided groups is divided into one group. There has been disclosed a simple model creation device for a production process that creates a simulation model that simply represents a production process by replacing it with a processing machine.
In addition, in the prior art described in Patent Document 2, NC data creation for easily and quickly generating NC data for controlling a 5-axis NC machine according to a computer simulation of a 3D model created by a 3D CAD / CAM device A method is disclosed.
The prior art described in Patent Document 3 discloses an NC data creation device that can reduce the change in angular velocity of the rotation axis of a 5-axis NC machine tool having three orthogonal axes and two rotation axes.

Japanese Patent Laid-Open No. 05-089080 Japanese Patent Laid-Open No. 09-062328 JP-A-2005-352876

For example, considering the processing time of about 12 [hours], the processing time for knowing the processing time is reduced to 1/10 or less considering that the calculation is repeated several times a day (about 5 to 6 times). It is desirable to make it. If the processing time can be shortened to 1/10 or less, it becomes easy to find processing conditions that satisfy the target processing time in one day, and processing data based on the processing conditions is calculated over about 12 [hours]. You can get it the next day.
When the prior art described in Patent Document 1 is applied to machining simulation by a machine tool, the simulation model is simplified. In this case, the simulation processing time can be shortened, but since the simulation operation changes, it is unclear how much error the obtained machining time and the actual machine tool machining time have. This is not preferable because the processing time of an actual machine tool may become unknown. Further, it is not possible to shorten the processing time for calculating the machining data having the longest processing time.
In the prior art described in Patent Document 2, the processing until the creation of CL data (cutter location data) corresponding to the movement path of the tool tip is the same as the conventional processing, and the CL data is used to control each axis of the machine tool. When converting to data, the X, Y, and Z axes are simultaneously corrected on the basis of the tool length and the tool tip vector to convert it to CL data at the tool turning center position, and from the tool tip vector to the two rotation axes Although the NC data is created by calculating the position, it is unknown whether the calculation time of the NC data is shortened as expected.
In the prior art described in Patent Document 3, CL data and NC data that reduce the angular velocity change can be obtained and the machining quality can be improved, but the processing time for knowing the machining time can be shortened. Is not very effective.
The present invention was devised in view of such points, and processing time for calculating processing data including CL data and NC data, and processing time for calculating processing time by simulation using processing data, It is an object of the present invention to provide a machining simulation method and a machining simulation support apparatus that can be further shortened.

As means for solving the above-mentioned problems, a first invention of the present invention is a machining simulation method as described in claim 1.
The machining simulation method according to claim 1 uses machining data calculation means capable of calculating machining data for machining a workpiece using a machine tool by inputting machining conditions, and machining data by the machining data calculation means. Is a machining simulation method for shortening the calculation time until calculating the machining data, and when calculating the machining data using the machining data calculation means, the machining data is included in the machining conditions so as to shorten the machining data calculation time. A simple machining condition in which at least one parameter value is changed from an actual parameter value used for actual machining to a simple parameter value is input, and the simple parameter value is calculated in a shorter time than using the actual parameter value A first step of obtaining simplified machining data;

The second invention of the present invention is a machining simulation method as set forth in claim 2.
The machining simulation method according to claim 2 is estimated to be required when machining is performed with an actual machine tool using the simple machining data obtained by the machining simulation method according to claim 1. A machining simulation method for obtaining a machining time, using simulation means capable of performing machining simulation by inputting machining data and using the machining data obtained from the machining data calculating means. A second step for obtaining a simple machining time required when using simple machining data by inputting to the simulation means and performing a simple machining simulation, and converting the obtained simple machining time to the changed simple parameter value The actual machining conditions are converted by the method and all the parameter values of the simple machining conditions are changed to the actual parameter values. Having a third step of converting into the estimated processing time corresponding to the processing time by.

The third invention of the present invention is a machining simulation method as set forth in claim 3.
The machining simulation method according to claim 3 is the machining simulation method according to claim 2, wherein the converted estimated machining time is compared with a target machining time which is a machining time targeted by the machine tool. When the estimated machining time is longer than the target machining time, the first machining condition is changed to a new simplified machining condition in which at least one parameter value is changed from an actual parameter value to a simplified parameter value. Steps 3 to 3 are repeated to obtain a new estimated machining time and compare it with the target machining time. If the estimated machining time is equal to or less than the target machining time, the estimated machining time corresponds to the estimated machining time. The actual machining conditions in which all of the simple machining condition parameter values are actual parameter values are input to the machining data calculation means, and the actual machining data as the actual machining data A fourth step of calculating the motor.

The fourth invention of the present invention is a machining simulation method as set forth in claim 4.
The machining simulation method according to claim 4 is the machining simulation method according to any one of claims 1 to 3, wherein the parameter value included in the simple machining condition is determined by a cutting amount by a machining tool. , Including at least one of an allowable error, when changing the cutting depth to a simple parameter value, change it to n times the cutting depth of the actual machining tool, and simplifying the conversion to the estimated machining time When the machining time is multiplied by n and the allowable error is changed to a simple parameter value, it is changed to k times the actual allowable error, and the simple machining time is directly used as the estimated machining time when converted into the estimated machining time. To do.

The fifth invention of the present invention is a machining simulation method as set forth in claim 5.
The machining simulation method according to claim 5, wherein when machining conditions are input, machining data for machining a workpiece using a machine tool can be calculated and machining data for outputting the calculated machining data to a simulation means. A calculation means and a simulation means that, when machining data is inputted, can simulate machining by the machine tool and outputs machining time required for machining using the inputted machining data to a machining simulation support device And a machining simulation support device connected to the.
In the machining simulation support device, at least one parameter value can be reduced from an actual parameter value used for actual machining to a simplified parameter so that the processing time of the machining data calculation unit and the processing time of the simulation unit can be shortened. A simple machining condition, which is a machining condition changed to a value, is output to the machining data calculation means.
Further, when a simple machining time that is a machining time based on the simple machining condition is input from the simulation means, the input simple machining time is converted into an actual value by a conversion method corresponding to the changed simple parameter value. It is possible to display by converting into an estimated machining time corresponding to the machining time by the actual parameter value of the machining conditions used for machining.

A sixth invention of the present invention is a machining simulation support apparatus as set forth in the sixth aspect.
The machining simulation support apparatus according to claim 6, wherein when machining conditions are input, machining data for machining a workpiece using a machine tool can be calculated, and the calculated machining data is output to a simulation unit. When the machining data is input to the data calculation means, a simulation that can perform the machining simulation by the machine tool and outputs the machining time required for machining using the inputted machining data to the machining simulation support device And a machining simulation support apparatus connected to the means.
In the machining simulation support device, at least one parameter value can be reduced from an actual parameter value used for actual machining to a simplified parameter so that the processing time of the machining data calculation unit and the processing time of the simulation unit can be shortened. A simple machining condition, which is a machining condition changed to a value, is output to the machining data calculation means.
Further, when a simple machining time that is a machining time based on the simple machining condition is input from the simulation means, the input simple machining time is converted into an actual value by a conversion method corresponding to the changed simple parameter value. The estimated machining time is converted into the estimated machining time corresponding to the machining time based on the actual parameter value of the machining conditions used for machining, and the estimated machining time is compared with the target machining time that is the target machining time of the machine tool.
If the estimated machining time is longer than the target machining time, the simple machining condition is changed, and a new simple machining condition in which at least one parameter value is changed from the actual parameter value to the simple parameter value is changed to the machining. A process of outputting to the data calculation means, converting the new simple machining time input from the simulation means into a new estimated machining time, and comparing it with the target machining time is repeated.
If the estimated machining time is equal to or less than the target machining time, the actual machining conditions in which all the parameter values of the simple machining conditions corresponding to the estimated machining time are actual parameter values are output to the machining data calculation unit, and the actual machining conditions are output. Actual machining data that is machining data is calculated.

A seventh invention of the present invention is a machining simulation support apparatus as set forth in the seventh aspect.
The machining simulation support apparatus according to claim 7 is the machining simulation support apparatus according to claim 5 or 6, wherein the parameter value included in the simple machining condition includes a cutting amount by a machining tool, and an allowable error. When the cutting depth is changed to a simple parameter value, it is changed to n times the cutting depth of the actual machining tool, and the simple machining time is converted into the estimated machining time. When it is multiplied by n and the allowable error is changed to a simple parameter value, it is changed to k times the actual allowable error, and the simple machining time is directly used as the estimated machining time when converted into the estimated machining time.

  If the machining simulation method according to claim 1 is used, it is very simple that at least one parameter value of machining conditions input to the machining data calculation means is changed from an actual parameter value to a simple parameter value and input. In the work, the processing time for calculating the machining data (as will be described later) can be significantly reduced by about 1/30 or the like.

Further, according to the machining simulation method of the second aspect, by using the simple machining data in the simulation means, the processing time for calculating the machining time (as will be described later) is significantly reduced by about 1/30 or the like. be able to.
Note that the simplified machining time obtained by simulation using simplified machining data is the machining time based on the simplified parameter value, so it differs from the actual machining time when using the actual parameter value. With the corresponding conversion method, it is possible to appropriately convert the estimated machining time corresponding to the actual machining time.

According to the machining simulation method of the third aspect, the total time of the processing time for calculating the simple machining data based on the simple parameter value and the processing time for calculating the simple machining time based on the simple machining data is significantly reduced. Therefore, it is possible to know each estimated machining time under various machining conditions in a sufficiently short time.
Thereby, it becomes easy to find the machining conditions that satisfy the target machining time in a sufficiently short time.

  According to the machining simulation method of the fourth aspect, the simple machining time can be appropriately converted into the estimated machining time corresponding to the actual machining time by a very simple process.

According to the machining simulation support apparatus of the fifth aspect, the operator only changes and inputs at least one parameter value of the machining condition input to the machining data calculation means from the actual parameter value to the simple parameter value. Then, since another work can be performed until the estimated machining time is displayed, it is very convenient.
In addition, since the time from the input of the simple parameter value to the display of the estimated machining time is significantly shortened to about 1/30, etc. (as will be described later) Since the degree can also be calculated, the working efficiency is very good.

According to the machining simulation support apparatus of the sixth aspect, at least one parameter value of the machining condition input to the machining data calculation means is changed from the actual parameter value to the simple parameter value and is input. In a simple operation, the processing time for calculating the machining data (as will be described later) can be significantly reduced by about 1/30.
Also in the simulation means, the processing time for calculating the simple machining time can be shortened by using the simple machining data calculated from the simple parameter values.
Note that the simplified machining time obtained by simulation using simplified machining data is the machining time based on the simplified parameter value, so it differs from the actual machining time when using the actual parameter value. With the corresponding conversion method, it is possible to appropriately convert the estimated machining time corresponding to the actual machining time.
Thereby, the processing time for calculating the machining data and the processing time for calculating the machining time by the simulation using the machining data can be further shortened.
Further, it is convenient because the machining conditions are automatically repeated until a machining condition that satisfies the target machining time is found.

  Further, according to the machining simulation support device of the seventh aspect, the simple machining time can be appropriately converted into the estimated machining time corresponding to the actual machining time by a very simple process.

FIG. 2A is a diagram for explaining connection with each device, and FIG. 2B is a diagram for explaining an example of a display screen of the machining simulation support apparatus 10. It is a flowchart explaining the flow of processing by each device.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. FIG. 1 shows an example of a connection diagram of a machining system to which a machining simulation method of the present invention is applied.
● [Equipment constituting the machining system (Fig. 1 (A))]
As shown in FIG. 1A, each device constituting the machining system includes a machining simulation support device 10 (for example, a personal computer), a CAD / CAM device 20 (corresponding to a machining data calculation unit), and a simulator 30 (a simulation unit). Equivalent), NC device 40 (numerical control device or the like), and machine tool 50. The machining simulation support device 10, the CAD / CAM device 20, the simulator 30, and the NC device 40 are connected to a communication line 80 such as a LAN, and can exchange data and the like between arbitrary devices.
The machine tool 50 is connected to the NC device 40, operates a tool, a workpiece, and the like based on a control signal from the NC device 40, and outputs signals from various sensors to the NC device 40.
In the present embodiment, an example in which a die is machined using a machining center having a ball end mill as a tool as a machine tool 50 will be described.

● [Processing flow by each device (Figure 2)]
Next, the flow of each process by the machining simulation support apparatus 10, the CAD / CAM apparatus 20, and the simulator 30 will be described with reference to the flowchart shown in FIG.
In step S10, the machining simulation support apparatus 10 displays the screen shown in the example of FIG. 1B, and machining conditions including simple parameter values are input from the operator in the input area In1, and calculation of the machining time is executed. When instructed, the process proceeds to step S20. In the example of FIG. 1B, the cutting condition (cutting depth), tolerance (tolerance), moving path, and tool diameter are listed as the types of parameters for the machining conditions, but various other parameters can be considered. It is done.
In FIG. 1B, “Pattern No” indicates the number of the processing condition pattern, and in the example of FIG. 1B, two processing conditions of pattern 1 and pattern 2 are prepared.
“Parameter” indicates the type of machining condition, and “Actual parameter value” indicates a parameter value used for machining performed by the actual machine tool 50 and the NC device 40. The “simple parameter value” is a parameter that has been changed from the actual parameter value in order to shorten the calculation time when the machining simulation is performed without using the actual machine tool 50 and the NC device 40 and the machining time is known. The value is shown.
For example, in the pattern “1” in FIG. 1B, as a simple parameter value, the cutting amount is changed from 0.1 [mm] to 10 [1.0] in order to shorten the processing time, An example in which the allowable error is changed from 0.01 [mm] to 0.1 [mm], which is 10 times, is shown. In pattern “2”, the cutting amount is set as a simple parameter value in order to shorten the processing time. Is changed from 0.1 [mm] to 20 [times] 2.0 [mm], and the allowable error is changed from 0.01 [mm] to 10 times 0.1 [mm].

In step S20, 1 is substituted into the machining condition pattern “n”, the simple flag is set to ON, and the process proceeds to step S30.
In step S30, it is determined whether or not the simple flag is ON. When the simple flag is ON (Yes), the process proceeds to step S40, and when the simple flag is OFF (No), the process proceeds to step S50.
When the process proceeds to step S40, the simple parameter value is read for the parameter for which both the actual parameter value and the simple parameter value are set in the machining condition pattern n (n = 1 in this case), and the process proceeds to step S60. move on. Step S40 is a step selected when shortening the processing time of processing data and processing time.
When the process proceeds to step S50, the actual parameter value is read even if the simple parameter value is set in the machining condition pattern n, and the process proceeds to step S60. Step S50 is a step selected when the actual machining data and the actual machining time are calculated using the actual parameter value of the machining condition pattern determined to be the shortest in step S160.
In step S60, the machining simulation support apparatus 10 outputs the machining conditions including the read parameter value (in this case, the machining conditions including the simple parameter value of the pattern 1) to the CAD / CAM apparatus 20, and step S70. Proceed to

In step S210, the CAD / CAM device 20 determines whether a machining condition is input from the machining simulation support device 10. If the machining conditions are not input (No), the process waits for input in step S210. If the machining conditions are input (Yes), the process proceeds to step S220.
In step S220, the CAD / CAM device 20 calculates processing data using the input processing conditions, and proceeds to step S230. In this case, the CAD / CAM device 20 calculates CL data using, for example, the input machining conditions, and calculates NC data using the CL data. The processing time required for this calculation is very long. When only the actual parameter value is used without using the simple parameter value, it may take 10 hours or more.

However, even if the inventor uses an actual parameter value, even if it takes 12 hours to calculate, if the incision amount is calculated with a simple parameter value set to 10 times the actual parameter value, the processing time is about 1 It was found that it can be shortened to / 10. With this setting, the processing time of 12 hours can be greatly shortened to about 1.2 hours.
In addition, even if the inventor uses an actual parameter value and the calculation takes 12 hours, if the calculation is performed with a simple parameter value in which the allowable error is set to 10 times the actual parameter value, the processing time is about 1 It was found that it can be shortened to / √10 (about 1/3). With this setting, the processing time of 12 hours can be greatly shortened to about 4 hours.
When the cutting amount is changed to a simple parameter value of 10 times and the allowable error is changed to a simple parameter value of 10 times, the processing time is reduced to [1/10] * [1/3] = 1/30. It was found that it can be greatly shortened. With this setting, the processing time of 12 hours can be greatly reduced to about 0.4 hours (about 24 minutes). With this processing time, it is possible to sufficiently set machining data and calculate machining data many times in one day.
In step S230, the CAD / CAM device 20 outputs the calculated machining data (in this case, simple machining data using simple parameter values) to the machining simulation support device 10 and the simulator 30.
The above steps S10 to S60 and steps S210 to S230 correspond to the first step.

In step S310, the simulator 30 determines whether or not machining data (in this case, simplified machining data) is input from the CAD / CAM device 20. If machining data has not been input (No), input is waited for in step S310. If the machining data has been input (Yes), the process proceeds to step S320.
In step S320, the simulator 30 performs machining simulation using the inputted machining data (in this case, simplified machining data), and calculates the machining time. For example, the simulator 30 is a personal computer, which stores a three-dimensional model of the machine tool 50, and uses the processing data to operate the three-dimensional model on the simulator to perform a simulation to process the workpiece and calculate the processing time. can do. The processing time required for this calculation is also long. When only the actual machining data (calculated from the actual parameter values) is used without using the simple machining data, it may take two hours or more.

However, even if the inventor uses actual machining data, even if it takes 2 hours to calculate, the inventor calculates using the simple machining data obtained from the simple parameter value in which the cutting depth is set to 10 times the actual parameter value. In this case, it was found that the processing time can be shortened to about 1/10. With this setting, the processing time of 2 hours can be significantly shortened to about 0.2 hours (about 12 minutes).
Similarly, it has been found that the processing time can be shortened to about 1 / √10 (about 1/3) when the allowable error is calculated with a simple parameter value set to 10 times the actual parameter value. With this setting, the processing time of 2 hours can be significantly shortened to about 0.67 hours (about 40 minutes).
When the cutting amount is changed to a simple parameter value of 10 times and the allowable error is changed to a simple parameter value of 10 times, the processing time is reduced to [1/10] * [1/3] = 1/30. It was found that it can be greatly shortened. With this setting, the processing time of 2 hours can be greatly reduced to about 0.067 hours (about 4 minutes).
However, since it is the result of the simulation performed with the simplified machining data obtained from the simple parameter values, not the actual machining data obtained from the actual parameter values, the time is different from the machining time based on the actual machining data. For this reason, it is necessary to convert into the processing time by actual processing data, and this conversion is performed by the process of step S120 in the processing simulation support apparatus 10 mentioned later.
In step S330, the simulator 30 outputs the calculated machining time (in this case, the simple machining time using the simple machining data) to the machining simulation support apparatus 10.
The above steps S310 to S330 correspond to the second step.

On the other hand, the machining simulation support apparatus 10 determines whether machining data is input from the CAD / CAM apparatus 20 in step S70. If the machining data has not been input (No), the process waits for input in step S70. If the machining data has been input (Yes), the process proceeds to step S80.
In step S80, the machining simulation support apparatus 10 determines whether the simple flag is ON. If the simple flag is not ON (No), the input machining data is simple machining data based on simple parameters and does not need to be stored in particular, so the process proceeds to step S100. When the simple flag is ON (Yes), since the input machining data is actual machining data based on actual parameters, the process proceeds to step S90.
In step S90, the machining simulation support apparatus 10 stores the actual machining data together with the machining condition pattern number (n), and proceeds to step S100. In this case, the actual machining data of the machining condition pattern number that minimizes the estimated machining time is stored. Then, information such as the file name of the stored actual machining data is displayed in the item “actual machining data name” in FIG. 1B (displayed as “D2” in the example of FIG. 1B). The actual machining data file is used for the actual NC device 40 and the machine tool 50.

In step S100, the machining simulation support apparatus 10 determines whether a machining time is input from the simulator 30. If the machining time has not been input (No), input is awaited in step S100. When the machining time is input (Yes), the process proceeds to step S110.
In step S110, the machining simulation support apparatus 10 determines whether the simple flag is ON. When the simple flag is ON (Yes), the input machining time is the simple machining time based on the simple machining data, and the process proceeds to step S120. If the simple flag is not ON (No), the process proceeds to step S180.
When the process proceeds to step S120, the machining simulation support apparatus 10 obtains and stores an estimated machining time obtained by converting the input simple machining time (in this case, the simple machining time of the pattern 1) into a machining time based on actual machining data. Then, it is displayed in the item of “estimated processing time” shown in FIG.

Next, the conversion method will be described.
The conversion method differs depending on the type of parameter changed from the actual parameter value to the simple parameter value. In the description so far, “the cut amount is changed to 10 times” and “the allowable error is changed to 10 times”.
For the parameter type “cut amount”, when the simple parameter value is changed to n times the actual parameter value, the simple machining time is multiplied by n and converted to the estimated machining time.
For the parameter type “allowable error”, when the simple parameter value is changed to k times the actual parameter value, the simple machining time is used as the estimated machining time as it is regardless of the value of k.
Therefore, when “change the cutting amount to 10 times” and “change the allowable error to 10 times”, the simple machining time is multiplied by 10 and converted to the estimated machining time. As described above, the simplified machining time is estimated by the conversion method corresponding to the changed simple parameter value (parameter type and change value) (corresponding to the actual machining time based on the actual machining data calculated from the actual parameter value). Convert to
The above steps S100 to S120 correspond to the third step.

In step S130, the machining simulation support apparatus 10 determines whether there is a next machining condition pattern for which a simple machining time based on a simple parameter value is to be calculated. If there is a next processing condition pattern (Yes), the process proceeds to step S140. If there is no next processing condition pattern (No), the process proceeds to step S150.
When the process proceeds to step S140, the machining simulation support apparatus 10 updates the value of n to n + 1, prepares to read a simple parameter value or the like of the next machining condition pattern, returns to step S30, and returns to the next machining condition pattern. Then, the process described above is executed again.

When the process proceeds to step S150, the machining simulation support apparatus 10 compares the estimated machining times of all machining condition patterns obtained so far with the target machining time, and becomes equal to or less than the target machining time (target machining time). It is determined whether or not there is an estimated machining time. If there is an estimated machining time pattern that is equal to or less than the target machining time (Yes), the process proceeds to step S160. If there is no estimated machining time pattern that is equal to or less than the target machining time (No), the process proceeds to step S175.
When it progresses to step S175, the process simulator assistance apparatus 10 displays that there was no pattern of the process conditions which satisfy | fills target process time, and complete | finishes a process (end B).
When the process proceeds to step S160, the machining simulator support apparatus 10 selects a machining condition pattern that minimizes the estimated machining time, substitutes the value of the machining condition pattern for “n”, and proceeds to step S165.

In step S165, the machining simulation support apparatus 10 determines whether there is an “instruction to calculate and execute actual machining data and actual machining time” from the operator. If calculation of actual machining data and actual machining time is started using actual parameter values without using simple parameter values, the CAD / CAM device 20 and simulator 30 cannot be freely used by an operator or the like for more than 10 hours. Take a check here. When the “execution instruction to calculate actual machining data and actual machining time” is input from the operator (Yes), the process proceeds to step S170, and “instruction not to calculate actual machining data and actual machining time” is input (No ), The process ends (end C).
When the process proceeds to step S170, the simple flag is turned OFF and the process returns to step S30. In the machining condition pattern in which the estimated machining time is the shortest, machining data (actual machining data) is used using actual parameter values instead of simple parameter values. And calculation of machining time (actual machining time) is started.
The above steps S150 to S170 correspond to the fourth step.

When it progresses to step S180, the process simulator assistance apparatus 10 memorize | stores the actual process time by the process condition pattern with which the estimated process time becomes the shortest, and progresses to step S185.
In step S185, the stored actual machining time is displayed in the item of “actual machining time” in FIG. 1B (“T2” is displayed in the example of FIG. 1B), and the process ends (end A). .

As described above, in the machining simulation method using the machining simulation support apparatus 10 described in the present embodiment, for example, a simple parameter value obtained by multiplying the actual parameter value by n is set and input with respect to the cutting amount and the allowable error. With this simple operation, machining data and machining time calculation time of about 10 hours or more can be significantly shortened to about 1/30.
In the description of the present embodiment, the machining simulation support apparatus 10 is used. However, the machining simulation support apparatus 10 is omitted, and the operator inputs a machining condition including a simple parameter value to the CAD / CAM apparatus 20 to perform CAD / CAM. The simplified machining data is calculated by the apparatus 20, the simplified machining data is input to the simulator 30 by the CAD / CAM apparatus 20 or the operator, the simplified machining time is calculated by the simulator 30, and the simplified machining time is converted to the estimated machining time by the operator. You may make it convert.
Until the converted estimated machining time satisfies the target machining time, the operator will be able to calculate the simplified machining data and the simplified machining time many times while changing the machining conditions. Since the time can be shortened, it is possible to calculate many times a day, and it is easy to find machining conditions that satisfy the target machining time in a very short time compared to the conventional method. is there. After finding the machining conditions that satisfy the target machining time, the actual machining data and the actual machining time can be obtained the next day by calculating the actual machining data and the actual machining time using the actual parameter values. .

In the description of the present embodiment, the machining simulation support apparatus 10, the CAD / CAM apparatus 20 (corresponding to the machining data calculating means), and the simulator 30 (corresponding to the simulation means) are described as examples. did. However, the present invention is not limited to this. For example, the CAD / CAM device 20 may have the function of the machining simulation support device 10, or the CAD / CAM device 20 may have the function of the simulator 30. The simulator 30 may have the function of the machining simulation support apparatus 10, and the CAD / CAM apparatus 20 may have the functions of the machining simulation support apparatus 10 and the simulator 30.
In the description of the present embodiment, an example has been described in which the estimated machining time is obtained under all of the plurality of simple machining conditions prepared in advance, and the simple machining condition that minimizes the estimated machining time is selected. When the simple machining conditions for the estimated machining time are found, the estimated machining time may not be obtained with the subsequent simple machining conditions, or the machining simulation support device automatically sets new simplified machining conditions. It may be configured to change to simple machining conditions (for example, the tool diameter is gradually increased) and repeated until a simple machining condition with an estimated machining time that is equal to or less than the target machining time is found.
In addition, when a simple machining condition (a machining condition including a simple parameter value) input by an operator is input, the machining simulation support apparatus 10 outputs the input simple machining condition to the CAD / CAM device 20, and CAD / CAM / The CAM device 20 calculates simple machining data, causes the simulator 30 to perform simple machining simulation, and converts the simple machining time input from the simulator 30 into an estimated machining time and displays it. Also good. In this case, the operator can determine whether or not the target machining time is satisfied under the input simplified machining condition. If it is determined that the target machining time is not satisfied, a new simplified machining condition may be input.

The machining simulation method and the machining simulation support apparatus of the present invention are not limited to the configuration, processing, display examples, and the like described in the present embodiment, and various modifications, additions, and deletions can be made without changing the gist of the present invention. Is possible.
In the description of the present embodiment, an example in which a die is created using a machining center has been described. However, the type of machine tool and the type of workpiece are not limited to these, and various machine tools, and It can be applied to various workpieces.
Further, the above (≧), the following (≦), the greater (>), the less (<), etc. may or may not include an equal sign.
The numerical values used in the description of the present embodiment are examples, and are not limited to these numerical values.

10 machining simulation support device 20 CAD / CAM device (machining data calculation means)
30 Simulator (simulation means)
40 NC device 50 Machine tool 80 Communication line

Claims (7)

Using machining data calculation means that can calculate machining data for machining a workpiece using a machine tool by inputting machining conditions,
A machining simulation method for reducing a calculation time until calculation of machining data by the machining data calculation means,
When calculating the machining data using the machining data calculating means, at least one parameter value included in the machining conditions is simplified from the actual parameter value used for actual machining so that the calculation time of the machining data is shortened. A first step of inputting simplified machining conditions changed to a parameter value and obtaining simplified machining data calculated in a shorter time than using the actual parameter value by the simple parameter value;
Machining simulation method. A machining simulation method for obtaining an estimated machining time estimated to be required when machining with an actual machine tool, using the simple machining data obtained by the machining simulation method according to claim 1. ,
Using simulation means capable of inputting machining data and simulating machining by the machine tool,
A second step of obtaining a simple machining time required when using simple machining data by inputting simple machining data obtained from the machining data calculating means to the simulation means and performing simple machining simulation;
The calculated simple machining time is converted by the conversion method corresponding to the changed simple parameter value, and converted to the estimated machining time corresponding to the machining time based on the actual machining conditions with all the parameter values of the simple machining conditions set to actual parameter values. And a third step to
Machining simulation method. A machining simulation method according to claim 2,
Compare the estimated machining time converted and the target machining time that is the target machining time in the machine tool,
If the estimated machining time is longer than the target machining time, the first step is performed under a new simplified machining condition in which the simplified machining condition is changed and at least one parameter value is changed from an actual parameter value to a simplified parameter value. -Repeat the process of performing the third step again to obtain a new estimated machining time and comparing it with the target machining time,
If the estimated machining time is less than or equal to the target machining time, the actual machining data is input by inputting actual machining conditions in which all the parameter values of the simple machining conditions corresponding to the estimated machining time are actual parameter values. A fourth step of calculating actual machining data that is
Machining simulation method. It is the processing simulation method according to any one of claims 1 to 3,
The parameter values included in the simplified machining conditions are
The amount of cut by the processing tool,
Including at least one of tolerance and
When changing the cutting depth to a simple parameter value, change it to n times the cutting depth by the actual machining tool, and when converting to the estimated machining time, multiply the simple machining time by n,
When changing the allowable error to a simple parameter value, change it to k times the actual allowable error, and when converting to the estimated machining time, the simple machining time is used as the estimated machining time as it is.
Machining simulation method. When machining conditions are input, machining data calculating means for calculating machining data for machining a workpiece using a machine tool and outputting the calculated machining data to a simulation means,
When machining data is input, it is possible to perform simulation of machining by the machine tool and to a simulation means for outputting machining time required for machining using the inputted machining data to a machining simulation support device A machined simulation support device,
Processing in which at least one parameter value is changed from an actual parameter value used for actual processing to a simple parameter value so that the processing time of the processing data calculation unit and the processing time of the simulation unit can be shortened A simple machining condition that is a condition is output to the machining data calculation means,
When a simple machining time that is a machining time based on the simple machining conditions is input from the simulation unit, the input simple machining time is converted into an actual machining by a conversion method corresponding to the changed simple parameter value. It is possible to display by converting into an estimated machining time corresponding to the machining time by the actual parameter value of the machining conditions to be used.
Processing simulation support device. When machining conditions are input, machining data calculating means for calculating machining data for machining a workpiece using a machine tool and outputting the calculated machining data to a simulation means,
When machining data is input, it is possible to perform simulation of machining by the machine tool and to a simulation means for outputting machining time required for machining using the inputted machining data to a machining simulation support device A machined simulation support device,
Processing in which at least one parameter value is changed from an actual parameter value used for actual processing to a simple parameter value so that the processing time of the processing data calculation unit and the processing time of the simulation unit can be shortened A simple machining condition that is a condition is output to the machining data calculation means,
When a simple machining time that is a machining time based on the simple machining conditions is input from the simulation unit, the input simple machining time is converted into an actual machining by a conversion method corresponding to the changed simple parameter value. Convert to the estimated machining time corresponding to the machining time by the actual parameter value of the machining conditions to be used,
Compare the estimated machining time with the target machining time which is the machining time targeted by the machine tool,
When the estimated machining time is longer than the target machining time, the machining data is changed to calculate the machining data by changing the simple machining condition and changing at least one parameter value from the actual parameter value to the simple parameter value. Output to the means, the new simple machining time input from the simulation means is converted into a new estimated machining time and repeated with the target machining time,
If the estimated machining time is less than or equal to the target machining time, the actual machining data is output to the machining data calculation means by outputting actual machining conditions in which all the parameter values of the simple machining conditions corresponding to the estimated machining time are actual parameter values. To calculate the actual machining data
Processing simulation support device. The machining simulation support device according to claim 5 or 6,
The parameter values included in the simplified machining conditions are
The amount of cut by the processing tool,
Including at least one of tolerance and
When changing the cutting depth to a simple parameter value, change it to n times the cutting depth by the actual machining tool, and when converting to the estimated machining time, multiply the simple machining time by n,
When changing the allowable error to a simple parameter value, change it to k times the actual allowable error, and when converting to the estimated machining time, the simple machining time is used as the estimated machining time as it is.
Processing simulation support device.

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