JPH01112408A - Method for controlling flexible manufacturing system - Google Patents

Abstract

PURPOSE:To decrease an NC data preparing time and labor and to improve the workability of a small quantity production by storing respective types of information such as a production allocation, a work number and mirror image information into a host computer to control an NC machine tool and selecting and outputting the mirror image information to the control function part of the machine tool based on respective these pieces of information. CONSTITUTION:At a host computer 1 to control plural NC machine tools 2, a schedule 3, a storing device 4 and a control arithmetic part 5 are arranged and at the device 4, a schedule data file 6 and an NC data file 7 are provided. A control function part 8 and a processing operating part 9 in which a program to operate the computer 1 is inputted into the arithmetic part 5 and the control information is inputted to respective machine tools 2 are provided. Into the computer, a production scheduling list 11 and an NC program 15 are inputted, a production allocation k1, a work number 16 and mirror image information are inputted into the device 4 and the mirror image information is selected and used.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for controlling a flexible manufacturing system.

Conventional technology When producing a wide variety of products in small quantities, a host computer operates multiple NC machine tools according to the production schedule to improve production efficiency.

The so-called flexible manufacturing
system (hereinafter simply referred to as FMS) has been adopted.

In FMS, multiple pieces of NC data are stored in the host computer in advance, and the NC data is sent to the control function section of each NC machine tool according to the production schedule, and the workpiece is supplied to the processing operation section of the NC machine tool. and processing.

Problems to be Solved by the Invention NC data requires a great deal of effort and time to be created for each workpiece, but because it is produced in small quantities, its utilization is extremely low. Moreover, when looking at the NC data from the machining shape of the workpiece, there are many parts that can be machined into a symmetrical shape around the axis of the workpiece.

Therefore, the present invention is an FMS that can overcome the above problems by sharing NC data for each workpiece when machining symmetrical parts.
The present invention provides a control method.

Means to Solve the Problem: The 1F computer that controls the NC machine tool stores various information such as production allocation, work number, mirror image information, etc. Based on this information, the mirror image information is transmitted to the NC machine tool. It is selected and output to the control function section.

Example Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

As shown in Figs. 1 to 5, I is a plurality of NC machine tools 2
A host computer that controls the scheduler 3
, a storage device 4 , and a control calculation unit (CPU) 5 . The storage device 4 has a schedule data file 6 and an NC
A data file 7 is also provided. A control program (not shown) for operating the host computer 1 is input into the control calculation unit 5 in advance. The NC machine tool 2 includes a control function section 8 and a machining operation section 9. The control function section 8 is a host computer! The control information for each NC machine tool 2 output from the control unit 2 is inputted thereto, and the control information is output to the machining operation unit 9. In this embodiment, the main shaft 10 of the machining operation unit 9 has a turning angle of ±540° on the XY plane, as shown in FIG. 2 is a production schedule list with NC program number 12. Scheduled processing start time 13.corresponding to this number I2. The scheduled processing end time 14, etc. are listed. I5 is an NC program, and work number 16. NC data 17 corresponding to this number 16
is listed. This NC data 17 includes mirror image information, programmable skip symbol 1 constituting
8. Programmable mirror image symbol 19. Spindle skip symbol 20. A principal axis mirror image symbol 21 is included. 22 is a work setting station that supplies a required work W to the machining operation unit 9 of the NC machine tool 2 according to instructions from the host computer 1; 23 is a work setting instruction diagram;

Here, upper computer 1 has production schedule list 11, NC
Input the program 15 and store the production allocation kl+work number 16. in the storage device 4. The information such as O is stored in the mirror image information. In this embodiment, since the storage device 4 is provided with a schedule data file 6 and an NC data file 7, the scheduler 3 writes the NC program number 12 to the schedule data file 6 for production allocation. Scheduled processing start time 13. Scheduled processing end time 1
It is made by memorizing the 4th prize. The work number 16° mirror image information and the NC data 17 are respectively stored in the NC data file 7 by applying the NC program I5 to a human-powered device (not shown) of the 1st computer 1.

Then, when the scheduled start time I3 of machining of the required work W is reached according to the production allocation, the control calculation unit 5 uses the schedule data file 6, N according to the control program.
Various information in the C data file 7, specifically, production assignment +, work number 16, NC data 17, and mirror image information kt are selectively output to the control function section 8 of the NC machine tool 2.

On the other hand, to explain the execution of the above-mentioned control program according to the flowchart shown in FIG. 2, section ■ manages the scheduled machining start time 13 from production allocation +, and when the look-ahead period for the scheduled machining start time 13 comes, section ■ The workpiece W to be machined is determined in section (2), and the necessity of machining a symmetrical shape is determined based on workpiece number 16 in section (2). If this judgment is negative, programmable skip symbol 18. By enabling or disabling the spindle skip symbol 20, only the information necessary for reference machining from the NC data file 7 is output to the control function section 8. If symmetrical shape machining is required, select programmable skip symbol 18 in section ■. By enabling or disabling the spindle skip symbol 20, only the information necessary for symmetrical machining from the NC data file 7 is output to the control function section 8. To clarify the explanation here, reference machining is defined as a workpiece W arranged on the XY plane as shown in FIG. Assume that it is arranged at an angle of +θ° from the X axis on the XY plane as shown. In addition, symmetrical machining means that the workpiece W is in the fourth position on the XY plane.
As shown in Figure (B), it is arranged with the X-axis as the axis of symmetry, and the axis e of the main shaft 10 is 1 θ° from the X-axis as shown in Figure 3.
(the same angle in the opposite direction across the X-axis from +θ° above). Based on this assumption, to explain the execution in Moe's section ■, first,
If the workpiece number 16 and the workpiece W to be machined is standard machining, the control calculation section 5 sets the programmable skip symbol 18 and the spindle skip symbol 20 shown in FIG.
NC that omitted the programmable mirror image symbol 19 and the main axis mirror image symbol 2 summer because it was judged to be valid.
The data 17 is output to the control function section 8 of the NG machine tool 2. Then, the rotation angle of the main spindle 10 with respect to the This work W is supplied to the actuating section 9, and this work W is
It is set in the machining operation section 9 with the arrangement shown in FIG.

Therefore, the spindle IO with the above-mentioned turning angle of +00
Accordingly, the workpiece W is subjected to standard processing. On the contrary,
When the control calculation unit 5 determines that symmetrical machining is to be performed from workpiece number 16, it determines that the programmable skip symbol 18 and the spindle skip symbol 20 are invalid, and creates an NC that includes the programmable mirror image symbol 19 and the spindle mirror image symbol 21. The data 17 is output to the control calculation section 8 of the NG machine tool 2. Then, the rotation angle of the spindle lO with respect to the It is set in the operating section 9, and the workpiece W is symmetrically machined.

Note that the present invention is not limited to the above-mentioned embodiment, and for example, as shown in FIG. A first principal axis mirror image symbol 21A and a second principal axis skip symbol 20B for setting the angle to +θ°.

It can also be configured with a second main axis mirror image symbol 21B for setting the rotation angle of the main axis IO with respect to the X axis to -θ°. In this case, as shown in FIG. 7, sections ■ to ■ are the same as in the previous embodiment, but the execution in sections ■ and ■ is determined by the control calculation unit 5 depending on the work number! 6, it is determined that the standard machining is performed, the programmable skip symbol I8 is determined to be valid, and the programmable skip symbol I8 is determined to be valid. The main spindle skip symbol 2OA is determined to be invalid, the second spindle skip symbol 20B is determined to be valid, and the first spindle mirror image symbol 2 is sent to the control function unit 8.
NG data I7 containing 1A is output, and the work W
is subjected to standard processing. On the contrary, when the control calculation unit 5 determines that symmetrical machining is performed based on the workpiece number 16, it determines that the programmable skip symbol I8 is invalid, determines that the first spindle skip symbol 20A is valid, and determines that the programmable skip symbol I8 is valid, and the second spindle skip symbol 2
0B is determined to be invalid, and outputs the NC data 17 including the second main axis mirror image symbol 21B to the control function unit 8,
As a result, the workpiece W is processed symmetrically.

Although not shown in the drawings, it will be easily understood that the symmetrical machining can be applied to the Y-axis in the same manner as in the embodiments described above by replacing the X-axis in the embodiments described above with the Y-axis. Note that the work W in this case is arranged as shown in FIG. 4(C) with respect to the standard machining arrangement of the work W in the above embodiment.

Although not shown in the drawings, depending on the case, the table on which the workpiece W of the machining operation unit 9 is attached may be rotated vertically and horizontally without changing the rotation angle of the main shaft 10. In this case, it is clear that the spindle 10 in the above embodiment can be read as a table.

Effects of the Invention As described above, according to the present invention, mirror image information can be selectively used to share NC data for parts other than symmetrical machining, so the time and effort for creating NG data can be reduced. This has the novel effect of improving workability in small-scale production in FMS.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram showing an embodiment of the present invention, Fig. 2 is a flowchart of the embodiment, Fig. 3 is a plan view showing the spindle rotation state of the NO machine tool of the embodiment, and Fig. 4 ( A), (
B) and (C) are plan views showing examples of arrangement of workpieces of the present invention;
FIG. 5 is an explanatory diagram of the NC data of the same embodiment, FIG. 6 is an explanatory diagram of the NC data of a different example of the present invention, and FIG. 7 is a flowchart of the same different example.・■...Upper computer, 2...NG machine tool, 9
...Control function section, 16...Work number, k, ...
Production allocation, k, ... mirror image information. 2 outsiders Figure 2 ■ Figure 3 OL Figure 5 Figure 6

Claims (1)

[Claims] Storing various information such as production allocation, work number, mirror image information, etc. in the host computer that controls the NC machine tool, and selecting and outputting the mirror image information to the control function section of the NC machine tool based on this various information. Flexible manufacturing characterized by
How to control the system.