JPH0415481B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a numerical control device with a display used in a four-axis numerically controlled lathe.

In a 4-axis numerically controlled lathe, in order to prevent interference between the two turrets and the chuck and tail stock, a tool barrier, a chuck barrier, and a tail stock barrier are used to prevent interference between the two turrets and the chuck and tail stock. If the tool barriers are set to surround the tail stock and there is interference between the tool barriers or between the tool barrier and another barrier, there is a method to immediately stop the feed of the tool post and prevent collisions between objects surrounded by the interfering barriers. It is taken.

On the other hand, in conventional numerical control devices with a display, various barriers were not displayed on the display, so checking the created machining program was done by actually moving the mechanical parts of the lathe according to the machining program. Interference between the turret, chuck, and tail stock could not be detected unless the tool was inspected, which caused the inconvenience of requiring a great deal of effort and time to check. Additionally, if there is an error in the machining program and interference occurs with the turret, etc., it is necessary to modify the machining program so that the interference does not occur. In other words, in order to check whether proper correction has been made, it is necessary to actually operate the mechanism part again, which has the drawback of complicating the setup work and deteriorating efficiency.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, it is an object of the present invention to provide a numerical control device that can easily check a machining program without actually moving the mechanical parts of the lathe.

That is, the present invention provides a barrier storage means having a display and storing the shapes of the chuck barrier, tail stock barrier and tool barrier, a program memory storing a machining program, and a simulation command means. Based on a simulation operation command from a simulation command means, the machining program stored in the program memory is read out, the shapes of the various barriers are read out from the barrier storage means, and the various barriers are displayed on the display. The apparatus further includes simulation control means for moving and displaying the barriers based on the read machining program.

Hereinafter, the present invention will be specifically explained based on an embodiment shown in the drawings.

FIG. 1 is a block diagram showing an example of a four-axis numerically controlled lathe to which the present invention is applied, and FIG. 2 is a diagram showing an example of a display mode on a display.

The 4-axis numerically controlled lathe 1 has a mechanism section 2 consisting of the mechanical parts of the lathe and a numerical control device 3 that controls the mechanism section 2, and the numerical control device 3 is provided with a main control section 5. . The main control unit 5 includes a tool shape memory 6 that stores the shapes of tools used in the lathe 1, a keyboard 7, a display control unit 9, a simulation control unit 10, a program memory 11 that stores the machining program PRO, and a chuck barrier.
A chuck barrier memory control section 12 stores the shape of the CBA, a tail stock barrier memory control section 13 stores the shape of the tail stock barrier SBA, and a tool barrier memory control section 15 stores the shape of the tool barrier TBA. is connected to the display control section 9, and a display 16 such as a cathode ray tube is connected to the display control section 9. The program memory 11 includes a feed axis control section 17 that drives the tool rest on which a tool is mounted.
and a tail stock control section 19 that controls the movement of the tail stock.The control section 17 is connected to the feed shaft drive motor 20 of the mechanism section 2, and the control section 1
9 is connected to a tail stock drive section 21. A turret position detector 22 for detecting the position of the turret is connected to the drive motor 20, a tail stock position detector 23 for detecting the position of the tail stock is connected to the drive unit 21, and the detector 22 has a tool barrier memory. The control section 15 is connected to the detector 23, and the tail stock barrier memory control section 13 is connected to the detector 23.

The 4-axis numerically controlled lathe 1 has the above configuration, so when creating and checking a machining program PRO, the operator issues a simulation operation command to the main control unit 5 from the keyboard 7.
SC is output, and the main control section 5 thereby drives the simulation control section 10 to instruct the start of simulation. The control unit 10 immediately reads the machining program PRO from the program memory 11, and also reads the chuck barrier CBA, tool barrier TBA, and tail stock barrier SBA stored in each barrier memory control unit 12, 13, and 15 via the main control unit 5. The shape is read out and displayed via the display control section 9 at a position on the screen of the display 16 according to the program PRO, as shown in FIG. In addition, the program PRO specifies the tools used for machining, so the control unit 1
0 searches tool shape memory 6 and programs
The tool shape TSH of the tool specified during PRO is read out, and the tool shape TSH is displayed in the area of the tool barrier TBA in a form corresponding to the mounting position on the tool post specified by the program PRO. In this state, the simulation control unit 10 moves the tool barrier TBA and the tool shape TSH on the display 16 according to the machining program PRO. That is, since the tool barrier TBA is set to surround the tool post and the tools attached to the tool post, the barrier TBA is moved in response to the movement of the tool post instructed by the machining program PRO. The operator is
Display 1 shows the tool barrier TBA that moves while showing the same movement as the tool rest during actual machining work.
6, check whether the tool barriers TBA interfere with each other, or whether the tool barriers TBA interfere with the tail stock barrier SBA and chuck barrier CBA, and check whether the machining program PRO is appropriate on the display 16. If barriers interfere with each other, it will actually be impossible to continue machining, so the machining program
Correct PRO and check again on Display 16.

In this way, the program PRO is modified and display 16 shows that there is no interference between the barriers.
Once confirmed above, the modified machining program
Based on the PRO, the feed shaft control section 17 and tail stock control section 19 drive and control the feed shaft drive motor 20 and tail stock drive section 21 to begin actual machining work. At this time, the actual position of the tail stock is detected by the tail stock position detector 23 and output to the tail stock barrier memory control section 13.
is set at the position detected by the detector 23. In addition, the position of the tool rest is determined by the tool rest position detector 22.
is detected by the tool barrier memory control unit 1.
5, and the control unit 15 sets the two-barrier TBA at the position detected by the detector 22 (the tool barrier TBA naturally moves as the machining progresses). The barrier set in this way (the chuck barrier CBA is stretched against the chuck, so
It does not move in the main axis and the Z and X axis directions perpendicular to it. ) is the position of the control unit 12, 13, 15
If the barriers interfere with each other, the movement of the motor 20 and therefore the turret are immediately stopped via the main control unit 5 and the feed axis control unit 17 to avoid interference (normally In this case, interference between barriers will be detected and corrected at the check stage of the machining program PRO, so this situation will not occur, but in order to prepare for situations such as a tool that cannot be simulated being incorrectly installed on the turret or the machining program PRO running out of control. ).

In addition, as in this embodiment, by displaying the tool shape TSH on the display 16 during simulation, the operator can simulate the machining mode more specifically, and can more appropriately judge the suitability of the machining program. can be done.

As explained above, according to the present invention, the chuck barrier memory control section 1 has the display 16 and stores the shapes of the chuck barrier CBA, the tail stock barrier SBA, and the tool barrier TBA.
2. Barrier storage means such as a tail stock barrier memory control section 13 and tool barrier memory control section 15 are provided, a program memory 11 is provided in which the machining program PRO is stored, and a simulation command means such as a keyboard 7 is provided, and the simulation Based on a simulation operation command SC from the command means, the machining program stored in the program memory is read out, the shapes of the various barriers are read out from the barrier storage means, and the various barriers are displayed on the display. , a main control section 5, a simulation control section 10, and a display control section 9, which move and display the barriers based on the read machining program.
Since the structure is equipped with a simulation control means such as the above, it is possible to easily check the machining program, including checking after modification, without actually moving the mechanical parts, and with various barriers displayed on the display. I can do it. As a result, during actual machining operations, situations such as the stoppage of the turret movement and therefore the stoppage of machining operations due to interference between barriers can be discovered beforehand during the simulation stage on the display, and the machining program can be adjusted accordingly. can be corrected, the setup work can be greatly simplified, and this can contribute to improving machining efficiency.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a four-axis numerically controlled lathe to which the present invention is applied, and FIG. 2 is a diagram showing an example of a display mode on a display. 3... Numerical control device, 11... Program memory, 12, 13, 15... Barrier storage means (barrier memory control unit), 16... Display, CBA
...Chuck barrier, SBA...Tail stock barrier, TBA...Tool barrier, PRO...Machining program.

Claims (1)

[Claims] 1. Provided with barrier storage means having a display, in which the shapes of the chuck barrier, tail stock barrier and tool barrier are stored, provided with a program memory in which the machining program is stored, provided with simulation command means, Based on a simulation operation command from the simulation command means, the machining program stored in the program memory is read out, and the shapes of the various barriers are read out from the barrier storage means, and the various barriers are displayed on the display. and a numerical control device further comprising simulation control means for moving and displaying the barriers based on the read machining program.