JPS59158403A - Numerical controller - Google Patents

Abstract

PURPOSE:To control stably the operation of a machine tool by adding a shape of work as one of various dimensions of shape and checking interference between a tool box and a mount so as to prevent collision between a chuck or a chuck claw and a tail stock. CONSTITUTION:A work 34 having the processing profile is fitted to the chuck claw 6 of the chuck 5 of a machine tool and a tool 2 is fitted to the mount 3 of the tool box 1 so as to process the work 34 between the tail stock 7 and the chuck 5. A disturbance check device 33 of this machine tool is provided with the 1st storage device 33a storing various shapes of the tool 2, the mount 3, the chuck claw 6 and the stock 7 and the 2nd storage device 33b storing the 1st and current dimensions of shape. Further, the device 33 is provided with an operating device 33c so as to discriminate coordinates representing the shape by using the dimensions of shape stored in the devices 33a, 33b and moving data formed by a CPU 21 and an MCU 22. Moreover, the disturbance between the tool box 1 and the mount 3 is checked so as to prevent collision among the chuck 5, the chuck claw 6 and the stock 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a numerical control device (hereinafter referred to as an NC device 5) equipped with interference checking means for preventing unnecessary contact during movement of a tool rest in a processing machine such as a lathe.

Conventionally, interference checks have been performed on lathes such as those shown in FIG. In this figure, 1 is a tool post, 2 is a tool, 3 is a mount for attaching the tool 2 to the tool post 1, 4 is a workpiece (not subject to interference check), 5 is a chuck, and 6 is the chuck A chuck claw is attached to 5 and grips the work 4, and 7 is a tail stock that supports the work 4.

FIG. 2 shows the configuration of the means for checking the interference of the lathe, in which 21 is a central processing unit (hereinafter referred to as CPU) which decodes and processes the given instructions, and 22 is the central processing unit (hereinafter referred to as CPU),
A movement data creation device (hereinafter referred to as MCU) that creates movement data based on commands from the PU 21; 23 is the MCU;
24 is an interference checking device that determines whether movement is possible or not by determining the size of the coordinate values of each of the four shapes using the movement data created in step 22 and the shape specifications for interference checking; 24 is the interference checking device 23; 25 is an amplifier that amplifies the servo output from the servo processing device 24, and 26 is the tool rest. This is a servo mall involved in the movement of the motor. In FIG. 2, arrows indicate the flow j of movement commands.

In the conventional lathe shown in FIG. 1, the tool rest 1, the tool 2, and the mount 3 are treated as one unit, and will be hereinafter referred to as a tool rest (in a broad sense). The interference check for the tool rest (in a broad sense) was performed only on the chuck 5 or the chuck jaws 6 and the tail stock 7, and was performed on the workpiece 4. This is because the tool rest (in a broad sense) and the workpiece 4 are inevitably in a state of interference when tilted during machining, and the result of interference checking is always interference, so there is no point in checking.

Now, in Figure 2, the first instruction given to the CPU
21 decodes it and sends a command to the MCU 22.

The MCU 22 receives instructions from the CPU 21.

Create movement data based on the data. Next, the interference check devices @-2 and 3 increase or decrease the amount of movement data based on the stored interference check shapes of the chuck 5 or chuck jaws 6 and tail stock 7 and the shape of the turret (in a broad sense). The size of the coordinate values constituting each shape is sequentially determined using the shapes, and it is determined whether movement is possible or not.

As a result of the determination, if the movement is possible (n), the movement data is passed to the Nervo processing device 24, but if the movement is not possible (4), the movement data is not passed, and a feedbank indicating interference is sent. The servo processing device 24 passes the transferred movement data to an amplifier 25 to control the servo output. Finally, the amplifier 25 amplifies the servo output, and the servo mode 2
6 is driven, and as a result, the tool rest (wide m) is moved.

The interference check performed in the conventional lathe described above is performed between the tool rest (in a broad sense) and the chuck 5 or the chuck jaws 6 and the tail stock 7, and depending on the workpiece shape or the movement path of the tool rest (in a broad sense), Although it was possible to move as a result of the interference check, the turret 1
Another disadvantage is that the workpiece 4 comes into contact with a non-cutting part such as the mounting base 3.

This invention was made in order to eliminate the drawbacks of the conventional tools as described above, and by adding the work shape as a shape specification and checking for interference between the tool rest and the mount, it is possible to improve the conventional tool. In addition to preventing collisions between the table (in a broad sense) and chucks or chuck jaws and tails/vines, we also consider preventing collisions between the turret and mounting base and the workpiece, thereby increasing the effectiveness of interference checks. is intended to provide. The present invention will be explained below with reference to the drawings.

FIG. 3 shows four parts of a lathe that are subject to interference checking according to the present invention.

In this figure, 34 is a workpiece having the illustrated machining shape, and other symbols are the same as in FIG. 1.

Figure 4 shows the configuration of the above interference check, and shows 33
33a and 33b are interference checking devices.

33c, and 33a is a first memory which stores the shape specifications of the tool rest 1, the tool 2 and the mounting base 3, the shape specifications of the chuck 5 and chuck jaws 6, and the shape specifications of the tail stock 7. 33b is a storage device for the workpiece shape, which stores the initial material shape, sequentially rewrites it by subtracting the machining allowance as the tool moves, and stores the shape specifications of the latest machining shape; 33c is the second storage device, which stores the shape specifications of the latest machining shape; 1st. Second storage device 33
a.

This is an arithmetic device that uses the shape specifications stored in the MCU 33b and the movement data created by the MCU 22 to determine the size of coordinate values indicating the shape. Other symbols are the same as in FIG. 2. Table 1 shows the first and second storage devices 33a.
, 33b show the shape data of the shape specifications stored.

FIG. 5 shows the flow of the interference check, where ■ to 0 indicate each step.

The interference check according to the present invention will be explained based on the flowchart of FIG. The shapes used in the interference check are as shown in Table 1, and the shape data e of the chuck 5 and chuck jaws 6 stored in the first storage device 33a and the shape data f of the tail stock in Table 1 7 are used. , and shape data al of the tool rest 1 when moved to the position specified by the KMCU 22 based on the stored shape specifications, shape data cI of the mounting base 3, shape data d' of the tool rest C (in a broad sense), and second storage device 3
3bK is stored n, and as the tool 2 is busy moving, the machining allowance is sequentially subtracted and expressed as the machining shape. 4 Shape data g of the workpiece 34
etc.

The flow of the interference check is as follows: (1) Based on the movement data created by the MCU 22 based on the commands from the CPU 21, the turret 1. Mounting stand 3. Each shape data a, c, of the tool rest (broad sense)
d to the position specified by the movement data is calculated and stored as 71 a', c', and d'. Using the shape data of the next job, take the shape d of the tool rest (broad sense), the shape e of the chuck 5 and the chuck jaw 6, and then the shape data d' of the tool rest (broad sense) and the shape of the tail stock 7. A calculation is performed to determine the size of the coordinate values that make up the shape with the data f, and ■, ■ determines whether it is movable. As a result, if movement becomes impossible, feedback will be given to the effect that interference will occur at that point (■).

The above flow is roughly the same as the conventional method. This invention is
After the workpiece 34 is made movable through the above checks, the workpiece 34 is stored in the second storage device 33b as a machining shape, having the shape specifications of the initial material shape, and sequentially subtracting the machining allowance as the tool 2 moves. Using the shape data g of [phase], calculate the magnitude of the coordinate values that make up the shape between the shape data a' of the tool post 1 and the shape data C' of the mounting base 3. Judgment 0゜ As a result, if it cannot be moved, it will give feedback that there will be interference in the same way as above, and if it can be moved, it will pass the movement data used for the interference check to the servo processing device 24 f(i). 1 Att for interference check”
Il ends, but the servo processing device 11i24. Amplifier 25. Information is transmitted to the servo mode 26 and the tool 2
When moving, Q and the shape take g of the workpiece 34 stored in the second storage device 33b shall be rewritten.
phase].

Although a lathe is shown above as a machine tool to be controlled, the present invention is also applicable to NC of a machine tool other than this, which has a tool post, a tool, a mounting stand, a workpiece, and a member for holding and driving the workpiece. Can be widely applied to equipment.

As explained in detail above, according to the present invention, the turret (in a broad sense), which was previously impossible to handle, can be handled separately into the cutting part and the non-cutting part. It is possible to check for interference between the tool rest and the mounting base on the non-cutting part of the workpiece, and the workpiece is treated as a machined shape.This has the effect of enabling automatic operation of more complex tool paths. .

[Brief explanation of drawings]

FIG. 1 is a diagram showing the main parts of a lathe, which is an example of an object to be checked for interference in a conventional NC device, FIG. 2 is a diagram showing the configuration of a conventional interference checking means, and FIG. A diagram showing the main parts of a lathe, which is an example of the target,
FIG. 4 is a diagram showing the configuration of one embodiment of the interference checking means in the present invention, and FIG. 5 is a diagram showing a flow of explanation of the operation of the embodiment of FIG. 4. In the figure, 1 is a tool post, 2 is a tool, 3 is a mounting base, 5 is a chuck, 6 is a chi+1 link claw, T is a tail stock, 21 is a CPU, 22 is an MCU, 24 is a servo processing device, and 25 is an amplifier , 26 is a servo mode, 33 is an interference check device, 33 & is a first storage device, 33b is a second storage device, 33e is an arithmetic device, and 34 is a workpiece. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Makoto Kuzuno - (1 other person) Procedural amendment (voluntary) 5811B 1936, month, day 1, case description 1. ￥ Application No. 58-033451 2, Title of the invention Numerical control device 3, Relationship with the person making the amendment Case Yuhito Kata, representative of the patent applicant, Dept. 4, Attorney 5, Detailed description of the invention in the specification subject to amendment Explanation column 6, Correction details (1) Change "Based on the movement data to the amplifier 25 to control the servo output" on page 4, lines 10-11 of the specification to "Send the servo output on the basis of the movement data." The output is controlled and passed to the amplifier 25.'' (2) Similarly, change the 3rd line "g work 4" in table 1 on page 7 to "
g work 34”. I"2

Claims (1)

[Claims] a first storage device that stores the shape specifications of the tool rest, the tool, and the mounting base, and the shape specifications of the members that hold and drive the workpiece; , a second storage device that stores the shape specifications of the latest machining shape by sequentially subtracting and rewriting the machining allowance according to the movement of the tool; , following the interference check between the tool and the mount and the member that holds and drives the workpiece, A'I
A numerical control device comprising: an arithmetic unit that checks interference between an Idd tool post and a mounting base and the workpiece indicated as a machining shape.