JPS6357146A - Multiple quantity pickup machining programming system for numerically controlled machine tool - Google Patents

Abstract

PURPOSE:To easily form a program and to enable the machining time to be reduced, by selectively processing any of the systems which spread information of all or one part of the machining information group to all or one part of the work coordinate system in accordance with a type of multiple pickup machining. CONSTITUTION:A program former inputs a type I or II of multiple quantity pickup machining from a keyboard 5 and stores input data in a memory 9. Next, the forming of a machining program is started from an input of work coordinate system position data, and the whole position data are defined to be stored in a memory 8. And if the input is finished by storing machining information in a memory 12, a main control part 2, on the basis of contents of the memories 9, 8, 12, spreads the information in the whole work coordinate system to determine a machining process in which a number of times of tool exchange decreases to a minimum. Next the type II, after it inputs an applicable machining surface angle and work coordinate system data of one part of the machining information group, inputs the machining information, and after the input is finished, a control part 2, which repeats the spread only about the applicable work coordinate system of the defined machining information, determines a machining process where the number of times of tool exchange decreases to the minimum.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a programming method for multi-cavity machining in a numerical (directly controlled (N)) machine tool.

(Technical background of the invention and its problems) FIG. 4 is a diagram showing an example of multi-piece machining using a conventional digital fall machine tool, in which a plurality of workpieces (hereinafter referred to as "workpieces") 100 or 54. It is attached to the table 101 of J9. As shown in this Figure 4,? Multi-piece machining, in which 31 workpieces are mounted on a table 101 of a machine tool such as a machining center, and then processed using an i...- machining program at one time, the machining time is particularly low. In recent years, from the viewpoint of shortening, it has been changed to /,)E. Regarding this multi-piece machining, the Kao control method disclosed in Japanese Patent Application Laid-Open No. 60-201857 (2ζ) has been put into practical use, and this prior art will be briefly explained.

FIGS. 5 and 6 are a plan layout diagram of the entire workpiece 100 (Wl to W8) subjected to multi-piece machining shown in FIG. 4, and a diagram showing the shape of the individual workpieces after machining is completed, respectively.

As shown in Figure 6, the workpiece W has tapped holes u+ at the four corners.
It is assumed that n(Mto>) and a polling hole M1)2 is machined in the center. FIG. 7 is a diagram showing an example of a conventional machine program for multi-piece machining. Figure 7 shows the multi-piece processing definition PMSI and PMS.
2 is defined in a hierarchical manner, and the program PMS2
The number and pitch of MIO tapped holes MHI in each workpiece are defined in , and the machining definition of MIO tapped holes M) (1) in each individual workpiece is defined, and the total number of workpieces is defined in program P~!51. , the pitch between the workpieces, and the machining of the tap hole MHI and the machining of the polling hole M) 12 of the program PMS2 as machining that is repeatedly applied to each work.

FIG. 8 is a block diagram of a conventional numerical control device, and FIG. 9 is a block diagram of a conventional multi-piece program (PR
13 is a flowchart illustrating an example of the process of step O). The numerical control device 1 has a main control section 2 consisting of a CPU, etc., and the main control section 2 is connected to a keyboard 5. A computer program memory 6, a stack memory 7, a multi-chip data memory 91, a machine control section 10, and the like are connected. The prior art will be explained below with reference to FIGS. 8 and 9. Fifth
When performing multi-piece machining on the workpieces W1 to W6 shown in the figure, the operator first inputs the machine program PRO shown in FIG. 7 from the keyboard 5 manually. The manually-generated cannibal program PRO is stored in the cannibal program memory 6, and when the multi-piece machining definition step PMSI exists in the cannibal program PRO, the main IT and IJ control section 2 executes the multi-piece machining program PRO shown in FIG. Execute multi-cavity machining according to the following. In other words, the multi-cavity program PR
In step S1, O sets the machining number MN in the multi-piece machining information memory 9 constituting the multi-piece machining data DAT to an initial value "1", and sets the primary machining reference point to the program origin P.
In addition to setting ZP, in step S2, multiple piece machining definition step PMS 1 in Kani program PRO is set.
Define the number of pieces 1 interval P) 1 etc. for multi-piece machining,
Proceed to the next step S3. In step S3, the previous multi-cavity data DA in the multi-cavity data memory 9 is
TA (in this case, the initial value of 1'°) is stored in the stack memory 7.
Transfer within. Next, the process advances to step S4 to perform superimposition processing. That is, based on the positioning information LIF such as the number of pieces to be processed for multiple pieces machining and the interval PI (etc.) shown in the multiple piece machining definition step PMSI, the number of pieces to be machined MN is set to the number of pieces to be machined up to that point (in this case, "1"). ”) to step PMSI
Multiply the number of pieces to be machined shown in to obtain the new number of pieces to be machined (in this case, MN・1×6), and calculate the number of pieces to be machined for each workpiece ~■ from the primary machining reference point (program origin PZP). The six secondary processing reference points 5P that serve as standards are calculated, and a large number of coordinates of the secondary processing reference points sp are obtained [
It is stored in the good news memory 9. Next, return to step S2,
A search is made to see if there is a further multiple-piece machining definition step PMS in the cannibal program PRO, and the second multiple-piece machining definition step PMS2 results in the six pieces superimposed in the multiple-piece machining data memory 9 in step S3. The coordinate system of is transferred into the stack memory 7. Further, regarding the expanded secondary machining reference point Sp, the number of machining MN is further determined based on the position foot table information LIF such as the number of pieces to be subjected to multi-piece machining and the interval Pl+ indicated in the multi-piece machining definition step PMS2. Multiply the number by 4 to "24" and set the secondary processing reference points SP to 3, 4 times each for each secondary processing reference point SP.
The next processing reference point 5PI11 is superimposed and developed, and its coordinate values are stored in the multi-piece data memory 9. Then, a total of 24 tertiary processing reference points 5PI11 are set in the multi-piece processing data memory 9 as a result of the two-time multilayer δ filling. The multi-piece machining program PRO advances from step S5 to step S7 via step S6, sets the remaining machining number to IN (machining number in the multi-cavity data memory 9), and sets the origin of the coordinate system to 24 in step S8. The first tertiary processing reference point 5PHI is set in step S9, and the processing information MIFI shown in the effective area ARA2 in FIG. 7 is set via the machine control unit 10 in step S9. Based machining, that is, machining using a center drill. When the machining for the first tertiary machining reference point SPH is completed, in step 510 the remaining machining number is reduced by "°1 pa" and the process returns to step Sit, where the remaining machining number is "o"
” The above operation is repeated until the center drill is executed for all 24 base !iζ points SP
When pilot holes of 4G have been drilled in all of the workpieces W (Wl-W6), the multi-piece machining program PRO returns from step Sll to step S2, and then to step S7.
After that, machining using the drill indicated in the machining information MIFI is performed on the 24 prepared holes in the same manner as described above. After drilling, tapping is performed, thus forming 24 holes with ridges.

After that, the multi-cavity program PRO is flagged as end flag 2.
Accordingly, the process advances from step S5 to step 512, and the main control unit 2 erases the seat (vote) of the three-component U machining reference point 5PI11 in the multi-cavity data memory 9 for which machining has been completed, and replaces it in the stack memory 7. A large number of coordinates of the secondary machining reference point sp are transferred and stored in the information memory 9. Then, as shown in FIG. Since machining has been instructed, based on the secondary machining reference point SP in the multi-piece machining information memory 9, in steps 511, 58, 59, and 510, machining MH2 by one hole is performed for each of the four workpieces W. The execution is performed based on the information MIF2. When the hole machining MH2 is completed, the process proceeds from step S5 to step 512 based on the end flag EF1, and the coordinates of the secondary machining base!Kang point sp are deleted from the multi-piece machining data memory 9 in the same manner as described above. The primary machining reference point (program origin PZP) in the stack memory 7 is stored in the multi-cavity data memory 9.
) is stored. Further, as shown in FIG. 7, since no more machining information MIF is stored in the Canadian program PRO, the execution of the multi-piece production program PRO is terminated in step S6.

This conventional method has the following problems (1) to (
4) exists.

(1) Since each processing reference point is expanded to all the grid points assumed from the pitch and number of pieces in the vertical and horizontal directions,
If the workpieces W are not present at all the grid points as shown in FIG. 10, or if they are placed at irregular intervals as shown in FIG. 11, it is not possible to perform multi-piece machining on the same workpiece group.

(2) All workpieces are arranged at a predetermined pitch dx as shown in Figure 5.
, it is very difficult to place it on the table at dy.

(3) Since the position definition information does not take into account the angle of the machining surface, even if the machine is capable of multi-face machining, it will be limited to multi-cavity machining on one specific plane.

(4) When there are multiple machining operations using the same tool for multiple workpieces, one tool change is performed until all machining operations using the same tool are completed. One of the purposes of multi-piece machining is to shorten the processing time, but according to this purpose, as shown in FIG.
A multi-piece machining process in which different processes are applied to each of 02 to 107 is conceivable, but the conventional method cannot cope with this at all.

In addition, from now on, for convenience of explanation, Figures 5, 10, and 11 will be used.
As shown in the figure, the exact same machining content is applied to multiple workpieces of the same shape, and the number of tool changes is not limited to one workpiece.
Multi-cavity machining using one control is called "Type IJ" (applying the same machining program to multiple identical workpieces), and the machining contents are different as shown in Fig. 12. "Type 11" (type 11) is a multi-cavity machining process that can be used for multiple different workpieces 102 to 107 and that controls the number of tool changes as much as possible, similar to Type I. is applied to multiple works of the same or different jobs).

(Objective of the invention) The present invention accomplishes the above-mentioned things [made from the blue,
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, it is an object of the present invention to easily and quickly process data related to multi-processing Niprograms using manual means such as a keyboard. It is an object of the present invention to provide a programming method for multi-piece machining in a numerically controlled machining machine that can be executed on all workpieces to be machined at once.

(Summary of the Invention) The programming method for multi-cavity machining in a numerically controlled machine tool of the present invention includes a memory that stores workpiece coordinate system position information, machining information, and multi-cavity information input manually from an input means. Whether the same machining information is applied to all workpiece coordinate systems based on the multi-cavity information in an automatic programming device for NC machine tools that has an automatic programming device for NC machine tools, or an automatic programming function for NC machine tools built in a numerical control device for machine tools. A desired Canadian program is generated by determining whether or not the program has been executed. That is, the present invention uses an automatic programming device for an NC machine tool or an automatic programming function for an NC machine tool built in a numerical control device for a machine tool to create an NC machine tool for machining multiple pieces.
In the method of creating a program, the type of multi-cavity machining is specified, and a group of workpiece coordinate system position data including the machining surface angle, number of workpiece coordinate system pairs, and workpiece coordinate system origin, and a group of machining information for the workpiece are defined. , depending on the type of multi-piece machining, all machining information in the machining information group is expanded to all of the workpiece coordinate systems, or some machining information in the machining information group is expanded to all of the workpiece coordinate systems. A desired NC program for multi-piece machining is generated by selecting and processing one of three methods for repeating expansion into the workpiece coordinate system.

(Embodiment of the Invention) An example in which the method of the present invention is applied to an interactive automatic programming device will be specifically described. FIG. 1 is a block diagram showing the configuration of an interactive automatic programming device implementing the present invention, corresponding to FIG. 8, and FIG. 2 is a diagram showing the processing flow of the present invention. The present invention will be explained below based on FIGS. 1 and 2.

The interactive automatic programming device 20 for NC machine tools is a system that creates a machine program in an interactive manner by displaying data manually, manually data, and automatically determined data on the CnT 4 using the keyboard 5 of the program creator. When the system is started, it first enters the manual phase of multi-cavity machining (step 520), and the program creator appropriately selects the presence or absence of multi-cavity machining, and if yes, the type of multi-cavity machining, i.e. Type I or Type I+. manually from the keyboard 5 (step 530). These manual data are stored in the multi-piece data memory 9. Subsequent processing is divided depending on the input multi-piece machining type. In addition, the machine control unit IO is indicated by a broken line in FIG. 1 because the purpose of the present invention is to control the machining of multi-cavity machining itself. This is because the machine control unit 10 is not an essential component of the present invention.

First, the case of multi-cavity machining type I or manual processing will be explained. Creation of a cutting program for multi-piece machining type I begins with manual input of workpiece coordinate system position data (step 521). Here, "F workpiece coordinate system position data" refers to the machining surface angle, the number of pairs of workpiece coordinate systems defined within the same machining surface angle, and each coordinate system number.

It refers to the amount of offset in the X, Y, and Z axis directions of the origin of each coordinate system. In this step 521, all workpiece coordinate system position data to be defined is defined. These defined workpiece coordinate system position data are stored in the workpiece coordinate system position data memory 8. Note that if the target is a finishing machine tool that does not have rotation/rotation axes, there is no need to input data regarding the machining surface angle. Next, the processing information is processed (step 52).
2 to 525), but the "processing information" referred to here is
Machining methods such as grooves, pockets, and milling hole 1 contour, machining data such as cutting width, finishing allowance, surface roughness, and the relevant machining method,
Information regarding the shape to be machined in the machining data. These processing information are stored in the processing information memory 12.

When all of the processing information has been manually processed, the main control unit 2 transfers the data to the multi-piece data memory 9. Work coordinate system position data memory 8
Based on the contents of the machining information memory 12, the defined machining information is expanded to all defined workpiece coordinate systems, and a machining process is determined so as to minimize the number of tool changes (step 526). The main control unit 2 then uses the technical information memory 1
Step 527) to convert into a desired NC program based on the data such as the output format of the G code and M code regarding the target NC device and machine tool stored in Step 527);
The NC program is stored in the computer program memory 6. This completes the creation of the Canadian program for Taibue.

Next, the multi-piece machining type 11 will be explained from the point of view of manual workpiece coordinate system position data.

Unless otherwise explained below, the contents of data, contents of processing, etc. are the same as in the case of type I, and type II is intended to apply different machining contents to a plurality of workpieces. First, - the machining surface angle to which a group of machining information should be applied.

Manually input the workpiece coordinate system data (step 531), then manually input the relevant machining information group (steps 532 to 336)
. The workpiece coordinate system position data group and the machining information group to be paired are combined by the main control section 2 by means such as pointer connection. When inputting additional data in addition to the already defined pairs of machining information group and workpiece coordinate system position data group, the above-mentioned process is repeated for as many pairs as necessary from the input of the next workpiece coordinate system position data. When all the workpiece coordinate system position information and machining information have been manually input, the main control unit 2 instructs all the workpiece coordinate system position data groups and the processing information to be developed only for the workpiece coordinate system to which the defined machining information is applied. The process is repeated for each pair of machining information groups, and the machining process is determined so as to minimize the number of tool changes (step 537).
). The following processing is the same as in the case of type (2) above.

FIG. 3 is a program showing an example of a data manual procedure in the present invention, and the present invention will be explained in more detail with respect to programming for multi-piece machining shown in FIGS. 5 and 6.

First, the operator inputs the type of multi-piece machining using manual means such as the keyboard 5. The machining in Figure 5 is type I, so there is multi-cavity machining, machining type MFTY.
-1 manually, and these data are stored in the multi-piece data memory 9. Inside the system, the machining type MFTY is determined, and processing on the left side of FIG. 2, that is, processing of type (2) is started. Next, the operator manually enters data on the machining surface angle, the number of workpiece coordinate system sets, and the origin of each workpiece coordinate system (machining reference point). In the case of Fig. 5, workpiece numbers (slot numbers 1 to 8) are assigned corresponding to the workpieces W1 to W6. Also, the origin of the workpiece coordinate system of the workpiece W1 is used as the overall machining reference point, and the workpieces W2 to W6 are assigned the workpiece numbers 1 to 8. X of each workpiece coordinate origin of w5,
The offset amounts in each of the Y and Z axes are determined manually as relative values from the workpiece coordinate origin of the workpiece Wl. These workpiece coordinate system position data are connected to a workpiece coordinate system position data memory 8. Note that if the target is not a multi-face processing machine, no manual effort is required for processing the machined surface angle.

Next, specifying the machining method and machining shape, or in this step, it is only necessary to define the machining method and machining shape for one workpiece. First, tap hole MHI (metric screw 1ilio) is specified as the machining method, and the machining depth is input. At this stage, the system determines the machining conditions necessary for machining the tapped hole M) 11 for all processes (center drill, pilot hole, tap, counterbore, etc.) based on the contents of the technology/information memory 7. . Next, the machining shape of the tapped hole Mi11 is entered manually, and a rectangular shape with pitches a and b is input. Since there is no shape other than square for machining tapped hole M++1, the system determines whether there is a machining method that should be used for the next multi-cavity machining. Since the next poling hole is specified as the manual data, the data regarding the machining method and machining shape for the poling hole MH2 are manually determined in the same procedure as for the tap 6 M111. These manual data are stored in the processing information memory 12.

Here, since there is no next machining following the polling hole MH2, this completes the interactive data processing.

From this point on, data processing for creating a multi-piece nib program is performed within the system. That is, the machining information for 111 workpieces stored in the machining information memory 12 is developed into the respective workpiece coordinate systems based on the data stored in the workpiece coordinate system data memory 8, and the machining information for the six workpieces W1 to When the coordinate development for W6 is completed, the processing order of each process is determined so as to minimize the number of tool changes. Thereafter, a desired NC program is created with reference to the post-processor data stored in the technical information memory 11, and is stored in the computer program memory 6. This completes the creation of a multi-piece nib program using the wooden sword method.

(Effects of the Invention) According to the present invention, it is possible to easily and quickly create an NC program for multi-cavity machining using a machine tool such as a machining center, not only for Type I but also for Type I+. Moreover, machining time is shortened because unnecessary tool changes do not occur. Furthermore, a machine tool with a rotating shaft specification also has the effect of being able to perform multi-cavity machining efficiently.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing 11 training examples of a device that implements the method of the present invention, FIG. 2 is a flowchart showing a processing example of the present invention, and FIG. 3 is a diagram showing an example of a program for multi-cavity machining of the present invention. , Fig. 4 is a diagram illustrating multi-cavity machining using a conventional numerically controlled machine tool, and Figs. 5 and 6 are plan layout diagrams of the entire workpiece and individual workpieces for multi-cavity machining shown in Fig. 4, respectively. Figure 7 is a diagram showing an example of a conventional multi-cavity machining program.
Figure 9 is a block diagram of a conventional numerical control device, Figure 9 is a flowchart showing a processing example of the conventional multi-piece Niprogram PRO, Figures 10 and 11 are diagrams explaining the arrangement of a plurality of workpieces, respectively. FIG. 12 is a diagram illustrating the arrangement of a plurality of irregularly shaped workpieces. 1... Numerical value; t1] control device, 2... Main control unit, 3.
...Pass line, 4...CRT, 5...Keyboard, 6...Cannibal program memory, 7...Stack memory, 8...Work coordinate system position data memory, 9...
・Multi-piece data memory, 10... Machine control section, 1
1... Technical information memory, 12... Processing information memory. $3 Ku vine 4 fig. 5 Encha 6 times 108 fig. 47 times PRO vine 9 fig.

Claims (1)

[Claims] Specifying the type of multi-cavity machining in a method of creating an NC program for multi-cavity machining using an automatic programming device for NC machine tools or an automatic programming function for NC machine tools built into a numerical control device for machine tools. At the same time, a workpiece coordinate system position data group including the machining surface angle, the number of workpiece coordinate system sets, and the workpiece coordinate system origin, and a machining information group for the workpiece are defined, and all of the machining information group is defined according to the type of multi-cavity machining. Select either a method of expanding machining information to all of the workpiece coordinate systems or a method of repeatedly expanding machining information of a part of the machining information group to the relevant workpiece coordinate system of the workpiece coordinate systems. - A multi-cavity machining programming method for numerically controlled machine tools, which is characterized by processing and generating a desired multi-cavity machining NC program.