JPS6299811A - Numerical controller - Google Patents

Abstract

PURPOSE:To ensure both chamfering and rounding even at the corner parts between a straight line and a circular arc as well as both circular arcs respectively, by using a processing circuit to a pre-calculation circuit to perform the chamfering and rounding even at the corner parts between the rectilinear and circular arc interpolations as well as both circular arc interpolations. CONSTITUTION:A chamfer processing circuit 5C for corner between a straight line and a circular arc, a rounding processing circuit 5D for corner between a straight line and a circular arc, a chamfer processing circuit 5E for corner between both circular arcs, and a rounding processing circuit 5F for corner between both circular arcs are added to a pre-calculation circuit containing a chamfer processing circuit 5A for corner between a straight line and a circular arc and a rounding processing circuit 5B for corner between both straight lines respectively. Then an instruction decoding processing circuit 4 decodes the instruction of a working program and the circuit 5 calculates the data to be given to a control circuit 6. In other words, the circuit 5C performs the chamfering between a straight line and a circular arc. The circuit 5D performs the rounding between a straight line and a circular arc and the circuit 5E performs the chamfering between both circular arcs. Then the circuit 5F performs the rounding between both circular arcs respectively.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a numerical control device (hereinafter referred to as an NC device) that controls the axis movement of a machine tool, etc. according to a machining program.
It is related to.

[Conventional technology]

Conventionally, a device of this kind is shown in FIG. 10.

In the figure, 1 is a tape containing a machining program written in NC language, which is input to a reading circuit 2, and is input to a buffer memory 3.
is stored in 4 is an instruction decoding processing circuit, 5 is a pre-calculation circuit, and 6 is a control circuit whose output signal is given to an axis movement amount output circuit 7, and a pulse distribution circuit 8 to a servo unit 9.
011 that is input to the motor 1 and drives the motor 10 is the motor 1.
12 is a main shaft rotation detector;
13 is a programmable controller (hereinafter referred to as PC)
, 14 is a machine tool to be controlled.Next, referring to FIG. 11, an outline of straight lines, straight surfaces, and 9. rounding of conventional NC devices will be explained. That is, FIG. 11 is a block diagram of the pre-calculation circuit 5 part, and in the figure, 5A shows a straight line and a straight corner chamfering processing circuit;
5B is a straight line and a straight line corner rounding processing circuit.

Next, the operation will be explained. First, the contents of the processing program on the tape 1 are read out by the reading circuit 2 and temporarily stored in the backup memory 3. The next processing data stored in the buffer memory 3 is decoded by the instruction decoding processing circuit 4 to decode the instruction contents of the processing program.1. , the next pre-calculation circuit 5 performs pre-processing through necessary numerical calculations, and the data resulting from the processing is sent to the next control circuit 6 for on-line control.

That is, the axis movement amount of the machine tool 14 is given to the axis movement amount output circuit I for each block of the program, a pulse is output from the pulse distribution circuit 8, and the servo unit 9 is operated.
The motor 10 is driven to move the shaft. A detector 11 is attached to the motor 101C to detect the amount of displacement of the motor 10 and feed it back to the servo unit 9 to drive the motor 101C by a predetermined amount. The spindle rotation detector 12 is attached to the spindle in order to detect the rotation speed of a rotating workpiece or a rotating tool, and feeds back the rotation speed of the spindle to the pulse distribution circuit 8 to convert the rotation speed of the motor j 110 into the spindle rotation speed. Synchronize.

On the other hand, PCl3 is a sequencer that performs control other than shaft drive of the machine tool 14, such as hydraulic control, tool exchange, spindle drive, and other auxiliary functions, and sends and receives signals to and from the control circuit 6. and perform the above control.

Next, with reference to FIG. 11, the operation of the conventional NC device for chamfering and rounding straight lines will be explained. The command decoding processing circuit 4 decodes the command of the machining program, and if it is linear interpolation and there is a chamfering address, the straight line and straight corner chamfering multi-processing circuit 5A sends data to be sent to the control circuit 6. calculate. In addition, when there is a rounding address, the straight line and straight corner rounding processing circuit 5B
Then, data for transferring data to the control circuit 6 is calculated.

FIG. 12 shows an example of a 9-row machining program for chamfering straight and straight corners, and FIG. 13 shows an example of a locus of execution of the machining program. In addition, Fig. 14 is an example of a machining program for rounding the corners of straight lines.
FIG. 15 shows an example of the next trajectory after executing the machining program.

[Problem that the invention seeks to solve]

As described above, conventional NC devices are configured to be able to perform chamfering and rounding only at the corners of straight lines and the thymus. There was a problem in that it was not possible to chamfer or round off the parts.

This invention was made to solve the above-mentioned problems, and an object of the present invention is to provide an NC device that can chamfer and round off the co-aligned portions of straight lines and circular arcs, and of circular arcs and circular arcs.

[Means for solving problems]

The NC device according to the present invention includes a pre-calculation circuit which has a chamfer processing circuit for straight lines and straight lines, a rounding processing circuit for straight lines and straight lines, and a chamfer processing circuit for straight lines and circular arcs, and a chamfer processing circuit for straight lines and circular arcs. It has the following configuration in addition to an arc rounding processing circuit, a circular arc-to-arc processing circuit, and an arc-to-arc rounding processing circuit.

[For production]

The pre-calculation circuit according to the present invention is provided with a processing function to be described later, and is chamfered 9 and beveled, respectively.

Director 1゛・
- In other words, in the chamfering processing circuit for straight lines and circular arcs, straight lines and circular arcs are chamfered, in the processing circuit for rounding straight lines and circular arcs, straight lines and circular arcs are rounded. The circuit chamfers the arcs, and the rounding processing circuit rounds the arcs.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In the figure, the same parts as in FIG. 10 are denoted by the same reference numerals, and in FIG. ri Linear and arc corner chamfering multi-processing circuit, 5
D is a corner rounding processing circuit for straight lines and circular arcs, 5E is a rounding processing circuit for circular arcs and circular arcs, and 5F is a rounding processing circuit for circular arcs and circular arcs.

Next, the operation will be explained. First, the command of the machining program is decoded by the command decoding processing circuit 4, and if the command is linear interpolation, there is an instruction to perform address setting for chamfering υ, and if the next command is also linear interpolation, it is necessary to perform a straight line and a straight line corner. The chamfering υ processing circuit 5A calculates data to be sent to the control circuit 6.

In linear interpolation, when the instruction for the rounding address is υ and the next instruction is also linear interpolation, data to be sent to the control circuit 6 is calculated in the straight line and straight corner rounding processing circuit 5B. In linear interpolation, when there is an instruction for chamfering address and the next instruction is circular interpolation, and when there is an instruction for chamfering address in circular interpolation and the next instruction is linear interpolation, K is for corner chamfering of straight line and arc. The processing circuit 5C calculates refined data to be sent to the control circuit 6. In linear interpolation, there is an instruction for a rounding address and the next instruction is circular interpolation, and in circular interpolation, there is an instruction for a rounding address and the next instruction is linear interpolation. Arc corner rounding processing circuit 5D
Then, data to be sent to the control circuit 6 is calculated. In circular interpolation, there is a command for a chamfering address, and when the next command is also circular interpolation, data to be sent to the control circuit 6 is calculated in the circular arc and circular arc chamfering processing circuit 5E. In circular interpolation, when the instruction for the rounding address is υ and the next instruction is also circular interpolation, data to be sent to the control circuit 6 is calculated in the circular arc and circular arc rounding processing circuit 5F, respectively.

FIG. 2 is an example of a machining program for chamfering straight and circular arc corners (1), and FIG. 3 is an example of the locus of execution of the machining program. Further, FIG. 4 is an example of a machining program for rounding off the corners of circular arcs and straight lines, and FIG. 5 is an example of a trajectory obtained by executing the machining program. 6th
The figure is an example of a machining program for chamfering the corners of circular arcs, and FIG. 7 is an example of the next trajectory after executing the machining program. Furthermore, FIG. 8 is an example of a machining program for rounding off the corners of circular arcs, and FIG. 9 is an example of the next trajectory after executing the machining program.

In the above embodiment, the address for chamfering is the instruction 9, but it is not limited to the instruction DIC, and other addresses may be used. However, when the address for rounding is being performed, the instruction Ri is used when linear interpolation is in progress, and the instruction C is used when circular interpolation is being performed. The address command is not limited to C, and other address commands may be used.

Although the primary chamfer is represented by two components, the length of the chamfer itself may be used, or the X-axis component may be used.

Although the processing circuits for corner chamfering and rounding of straight lines, straight lines, straight lines and circular arcs, and circular arcs and circular arcs are divided into six parts, they may be one, or may be divided into smaller parts.

〔Effect of the invention〕

As described above, according to the present invention, linear interpolation and circular interpolation,
A processing circuit is installed in the pre-calculation circuit so that chamfering and rounding can be performed on the corners of circular interpolation and circular interpolation, respectively, so chamfering or rounding can be performed on the corners of all machined surfaces during NC machining. There is an effect that can be done automatically.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a program diagram showing an example of a machining program for chamfering straight and circular corners, and FIG. A machining model diagram showing an example of an executed trajectory, Fig. 4 is a program diagram showing an example of a machining program for rounding a straight line and a circular arc O=+-, and Fig. 5 shows the execution of the machining program in Fig. 4. Fig. 6 is a program diagram showing an example of a predetermined machining program for chamfering two arcs together, and Fig. 7 is a diagram showing an example of a machining program shown in Fig. 6. A machining model diagram showing an example of the trajectory, Figure 8 is a circular arc and a corner rounding t of the circular arc.
A program diagram showing an example of a machining program to perform,
Fig. 9 is a machining model diagram showing an example of the trajectory of executing the machining program in Fig. 8, Fig. 10 is a block diagram showing the configuration of a conventional NC device, and Fig. 11 is a pre-calculation circuit part of the conventional NC device. Fig. 12 is a program diagram showing an example of a machining program for chamfering straight-line and straight-line corners, and Fig. 13 is a machining model showing an example of the machining trajectory after executing the machining program in Fig. 12. Figure 14 is a program diagram showing an example of a machining program for performing straight line and straight corner rounding υ, and Figure 15 is a machining model diagram showing an example of the trajectory when the machining program in Figure 14 is executed. . In the figure, 2 is a reading circuit, 4 is an instruction decoding processing circuit, 1
0 is a motor, 14 is a machine tool, 5E is a circular arc and a corner chamfering processing circuit for the circular arc, and 5F is a circular arc and a corner rounding processing circuit for the circular arc. Patent Applicant Mitsubishi Electric Co., Ltd. Agent Patent Attorney 1) Hiroshi Sawa (2 others) Figure 1 Figure 2 (xl, zl) Figure 4 Figure 5 6rlA Figure 8 Figure 11 Figure 12 Figure 13 (x+, z+) Figure 14 Figure 15 Procedural amendment (spontaneous) 't'+, i'l Office, official 1, case indication Patent Application No. 239052/1989 2,
Name of the invention Numerical control device 3, Person making the amendment Representative Mamoru Shiki 1 Ebisu 4, Agent Postal code 105 Address
1-4-10 Nishi-Shinbashi, Minato-ku, Tokyo, Column 6 of the detailed description of the invention in the specification to be amended, 1-1 of the statement of contents of the amendment! -1) Correct. The specification is amended as follows.

Claims (1)

[Claims] The instruction contents of the machining program are decoded by an instruction decoding processing circuit, and corner rounding is performed based on the decoded instructions.
Or, the calculation of chamfering processing is executed by the pre-calculation circuit,
In a numerical control device that drives the motor of a machine tool by determining the amount of axis movement from the calculation results of the pre-calculation circuit, the pre-calculation circuit performs linear interpolation, circular interpolation, and chamfering of the corner portions of circular interpolation and circular interpolation. and a processing circuit that performs rounding.