JP2537325Y2 - Numerical control device with machine state discrimination function - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention provides a function to determine the machine state, such as machine lock and background drawing, when performing a program check, especially in a numerical control device (NC device). And a numerical controller having the same.

[Conventional technology]

When performing NC machining on a numerically controlled (hereinafter, referred to as NC) machine tool, an operator often creates an NC machining program. Then, based on the command of the NC machining program, the NC device controls the tool or the workpiece, and finishes the workpiece into a desired shape and dimensions.

Further, when the NC machining program is created, the operator performs a program check to see if there is any program error, and after the confirmation, actually performs the machining.

On the other hand, there is also known an NC machine tool having a function of attaching a touch sensor to a main shaft and bringing the touched object into contact with a workpiece, and measuring the hole diameter from the position information and centering a reference hole.
The skip function (G31) is included in this measurement function and centering function.
G code command is used. This skip function (G31) is a skip signal (such as a touch signal from a touch sensor) during the axis movement command following this G code.
Is input, the remaining axis movement command is interrupted, and the command of the next block is executed. Then, the NC device performs dimension measurement and centering using the position information at the time of input of the skip signal.

[Problems to be solved by the invention]

By the way, when checking the created NC machining program in machine lock or background drawing mode, according to the command of this NC machining program, without moving each axis of the NC machine tool, move information data Or display only.

In such a case, when the NC processing program including the command of the skip function (G31) is program-checked, the skip signal is not input during the axis movement, so the movement information data is counted or drawn up to the axis movement command final value.
Execute the next block. However, when the movement information data is counted up to the final value of the axis movement command, the measurement function and the centering function determine that the touch signal (skip signal) is not input, and that the touch sensor is abnormal or the workpiece is abnormal. Judgment is made and alarm processing is performed.

Therefore, the operator issues a skip function command (G3
In order to prevent the program check of the NC machining program including 1) from being performed in the machine lock or the background drawing mode, an operation to jump manually was performed.
There has been a problem that the operation is very complicated.

This device checks the operation status of the NC machine tool and automatically jumps the NC machining program block including the skip function command (G31) when the machine lock or background drawing mode is selected. NC with a machine state discrimination function that can perform NC machining program checks without the need for manual operation
It is to provide a device.

[Means for solving the problem]

In order to solve the above problems, a numerical control device having a machine state determination function according to the present invention is a numerical control device that controls a numerically controlled machine tool, and whether the numerically controlled machine tool is capable of axial movement. When performing a program check of an NC machining program including a machine code memory that stores a state and a block of a G code command of a skip function, the data of the machine status memory is read by the command of the NC machining program, If the data in the state memory is not axis-movable, jump to the sequence number specified in the NC machining program and execute with the block.
A machine state determining means for executing the next block when the axis can be moved; automatically determining the state of the axis movement of the numerically controlled machine tool; and when the axis cannot be moved, the G code of the skip function is provided. It is configured to automatically skip the command block and execute the NC machining program.

[Action]

If the alarm processing is performed unless the axis is moved according to the command of the NC machining program, for example, a block for discriminating the machine state is inserted at the head of the NC machining program for automatic centering.

When this NC machining program is executed, the machine state determination means reads information stored at a predetermined address of the machine state memory, executes the next block as it is when the axis moves, and when the axis does not move, And jumps to the block of the sequence number measured by the machine state determination block, and executes the command of that block.

〔Example〕

Hereinafter, an embodiment of an NC device having a machine state determination function of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram of the present invention, FIG. 2 is a flowchart for explaining the processing of the present invention, FIG. 3 is an explanatory diagram of an NC machining program, and FIG. 4 is an explanatory diagram of a machine state memory.

In FIG. 1, reference numeral 1 denotes a microprocessor (CPU) to which a bus line 2 is connected.

3 is the RO where the system program of the NC unit is stored
M and 4 are RAMs in which data and the like are stored.

6 is a CRT of a display device, 7 is a keyboard (K.
B.).

Reference numeral 8 denotes an NC machining program memory in which an NC machining program is stored.

Reference numeral 5 denotes a machine state memory in which the machine state is stored. For example, when the machine lock selection switch on the manual operation panel 11 is operated to the machine lock side, 5 bits of a predetermined address (# 3010 in the embodiment) are stored. The eye state switches from “0” to “1”. When this address is read from the background side, the state of the eighth bit becomes "1", and when this address is read from the foreground side, the state of the eighth bit becomes "0" (see FIG. 4). The contents can be displayed by a predetermined operation.

Reference numeral 9 denotes a machine state discriminating means for discriminating the machine state.

The mechanical state determination processing of the present invention configured as described above will be described with reference to FIGS. 2 and 3. FIG.

As shown in FIG. 3, it is assumed that a block for machine state discrimination of N100 1F [# 3010 GE 16] GOTO 900; is inserted in the sub-program "0 9050" of the NC machining program "00001".

When the NC processing program for performing the program check is specified, the processor 1 reads out the NC processing program block by block (step S21).

Next, the processor 1 determines whether or not the read block is a block of a machine state determination command (step S1).
S22). If the block is a machine state determination command block, the program of the machine state determination means 9 is read and executed (step S23).

Next, the state of a predetermined address in the machine state memory 5 is read, and it is determined whether or not the axis does not move (step S24). For example, it is determined whether the fifth or eighth bit of the predetermined address (# 3010) is "1" or "0". If either of them is "1", the axis does not move, so that the sequence jumps to the sequence No. (N900 in the embodiment) specified by the machine state determination command block (step S25).

In step S26, it is determined whether or not the read block is a program end, and if it is a program end, the process of the present invention is ended. Is read. If it is determined in step S22 that the block is not the machine state determination command block, the read block is executed (step S27), and the process proceeds to step S26.

If it is determined in step S24 that the axis can be moved, the process proceeds to step S26.

In this way, it is possible to automatically determine whether or not the state of the NC machine tool performing the program check is capable of axis movement, and to automatically perform the operation of skipping the block of the skip function (G31). As a result, the operator does not need to perform a complicated manual operation for jumping, can concentrate on the program check, and the program check becomes easy.

In the above embodiment, the machine state determination function is described in the case of the automatic measurement subprogram. However, the present invention is not limited to this, and includes a skip function (G31) in addition to a machine lock mode and a background drawing mode. It is sufficient if it is necessary to determine the machine state in which the axis is not moved when the NC machining program is checked.

[Effect of the invention]

According to the present invention, the NC including the skip function (G31)
If it is a machining program and a block for discriminating the machine state is inserted, the operation including the skip function (G31) is automatically performed so that the operator does not need to perform complicated manual operations. Checking the machining program has become easier.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of the present invention, FIG. 2 is a flowchart for explaining the processing of the present invention, FIG. 3 is an explanatory diagram of an NC machining program, and FIG. 4 is an explanatory diagram of a machine state memory. 1 ... microprocessor (CPU), 2 ... bus line, 3 ... ROM, 4 ... RAM, 5 ... machine state memory, 6
... CRT of display device, 7 ... Keyboard of input means, 8
…… NC machining program memory, 9 …… Mechanical state discriminating means, 11 …… Manual operation panel.

Claims (1)

(57) [Scope of request for utility model registration] 1. A numerical control device for controlling a numerically controlled machine tool, comprising: a machine state memory for storing whether or not the numerically controlled machine tool is axially movable; and a G code command for a skip function. When performing a program check of the NC machining program including the block, the data of the machine state memory is read by a command of the NC machining program, and if the data of the machine state memory cannot be moved along the axis, the NC machining program executes the program. Machine state discriminating means for jumping to the designated sequence number, executing from the block, and executing the next block when the axis can be moved, automatically discriminating the axis movement state of the numerically controlled machine tool do it,
A numerical controller having a machine state discriminating function, wherein when the axis cannot be moved, the NC processing program is automatically executed by skipping over the block of the G code command of the skip function.