JPH04111002A - Method and device for generating numerical control information - Google Patents

Abstract

PURPOSE:To reduce the burden of an operator and to improve the working efficiency by offsetting automatically a working shape and generating a cutting path. CONSTITUTION:With respect to a process for executing working by using two tool cutting edge points for coming into contact with a work, a cutting path SF based on one tool cutting edge point of two tool cutting edge points as a reference is generated as numerical control information from a numerical control information storage memory 7 by a cutting path information generating part 4. Therefore, even if a parts shape is inputted as it is, such working as a cutting edge width portion of a tool penetrates into a work can be avoided. Accordingly, at the time of obtaining a cutting path of a process for executing working by using a tool having two tool cutting edge points for coming into contact with a work, it becomes necessary to input a parts shape obtained by considering by cutting edge width of a tool in advance. In such a way, the burden of an operator is reduced and the working efficiency can be improved.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a numerical control information creation method and apparatus for creating numerical control information based on input machining information. The present invention relates to a method and apparatus for creating a cutting path in a machining process using two tools as numerical control information.

(Prior art) A conventional numerical control information creation device determines the part to be machined, the cutting direction, the shape to be cut, the tool used for cutting, the cutting conditions, etc. for each machining process based on input machining information. Then, numerical control information is created according to these machining part data, cutting direction data, machining shape data, tool data, cutting condition data, etc.

FIG. 7 is a block diagram showing an example of the above-mentioned conventional numerical control information creation device, in which the process data determination unit 2 stores machining part data, cutting direction data, SB such as machining shape data to be cut, tool data used for cutting, cutting condition data, etc. is determined for each machining process and stored in the process data storage memory 3. The cutting path information creation unit 4 receives machining part data, cutting direction data, and machining shape data S from the process data storage memory 3.
C is read out to generate a cutting path SF, and the tool information creation unit 5 reads tool data SD from the process data storage memory 3 to generate a tool number command and a tool correction number command SG,
Further, the cutting condition information generating section 6 reads the cutting condition data SE from the process data storage memory 3 and generates a spindle rotation speed command and a feed speed command SH. And these cutting paths S
F, tool number command, tool correction number command SG, spindle rotation speed command, and feed speed command SN are stored in the numerical control information storage memory 7.
Store in.

(Problem to be solved by the invention) It is possible to process a part as shown in FIG. 9 using a tool having two cutting edge points as shown in FIG. 8 using the above-mentioned conventional numerical control information creation device. When creating numerical control information to be carried out, the operator first inputs the tool data shown in FIG. 8 and the material shape data and part shape data shown in FIG. 9 from the operation panel 1. Then, the process data determining unit 2 stores machining part data, cutting direction data, machining shape data, tool data, and cutting condition data as shown in FIG. 1O in the process data storage memory 3.

Therefore, the numerical control information obtained as a result is as shown in FIG. However, when actual machining is performed using this numerical control information, the machining ends up cutting into the workpiece by the width of the cutting edge of the tool in the sequence of N3 and N4, as shown in FIG.

Therefore, in order to obtain numerical control information for performing the desired processing, the part shape input from the operation panel 1 must be
As shown in the figure, it was necessary to create a shape that took into account the width of the cutting edge of the tool, which placed a heavy burden on the operator.

The present invention was made in view of the above-mentioned circumstances, and an object of the present invention is to provide a method and apparatus for creating numerical control information that does not require an operator to input the shape of a part in consideration of the cutting edge width of a tool. be.

(Means for Solving the Problems) The present invention relates to a numerical control information creation method and apparatus for creating numerical control information based on input machining information. For the process of machining using a tool with two cutting edge points, this can be achieved by creating a cutting path based on one of the two tool cutting edge points as numerical control information. , a first determining means for determining an offset distance from tool data for offsetting the machining shape of a machining process using a tool having two tool cutting edge points that contact the workpiece; a second determining means for determining an offset direction and offset conditions for offset based on the cutting direction of the step;
generating means for generating an offset shape by offsetting the machining shape of the step from the determined offset distance, offset direction, and offset condition, and generating one of the two tool cutting edge points based on the offset shape. This is achieved by finding the cutting path based on the tool cutting edge point and creating it as numerical control information.

(Function) In the present invention, the cutting path is created by automatically offsetting the machining shape, so even if the part shape is input as is, it will not cut into the workpiece by the width of the cutting edge of the tool. It is possible to avoid unnecessary processing.

(Embodiment) FIG. 1 is a block diagram showing an example of the numerical control information creation device of the present invention in correspondence with FIG. 7, and the same components are given the same reference numerals and the description thereof will be omitted. Tool data SD read out from the process data storage memory 3 to the offset distance determining section 8
The tool cutting edge width is sent to the offset shape generating unit 1O as the offset distance Of. Further, based on the cutting direction data SCD read out from the process data storage memory 3 to the offset direction/offset condition determination unit 9, only the offset force direction Od and offset conditions as shown in FIG. 3 are determined, and the offset shape is generated. The information is sent to department lO.

Then, the offset distance determining section 8 and the offset direction/
From the offset condition determining unit 9 to the offset shape generating unit 10
The offset distance Of and offset direction 08. An offset shape E0 is generated from the offset condition OJ and the machining shape data SCF read out from the process data storage memory 3 to the offset shape generation section 10, and sent to the cutting path information creation section 4.
. The cutting path SF is generated based on the following.

In such a configuration, an example of its operation is shown in Figure 2 (A).
, (B), the offset shape generation unit IO initializes counters n and m (step S1), and for example, starts point KP of machining shape data as shown in FIG. 10, (KXn , KZ, ) from the process data storage memory 3, and read out the starting point OPM (OX□, OZm) of the offset shape as shown in FIG.
) is sent to the cutting path information creation section 4 (step S2
．． ). Then, P, (KX
nKZ,) to P, (X,, Za) in buffer B8
At the same time, the offset direction 0. which is sent from the traveling direction or the offset direction/offset condition determining section 9 passes through the P II. To the linear equation that is the same as
Calculate BZ +C-0 and apply linear equation A to buffer B.
Store as X+B, Z+C, -O (step S3). Next, the counters n and m are counted up (step S4), and the next point KP, (KXn
, to 2. ) is read from the process data storage memory 3 and stored as P in the buffer ab, and the buffer 6
Read KPa from a, KP, then KP, Henno linear equation A
Calculate X + BZ + C-0 and add Ab× to buffer B.
+BbZ10b-0 (step S5).

Then, the traveling direction Ob from Pa to Pb is determined (step S6), and this traveling direction Ob and the offset direction 0.
It is checked whether or not it matches (step S7). Traveling direction Ob and offset direction 0. If they match, the linear equation AbX `` BbZ '' Cb-
Linear formula that reads 0 and offsets the offset distance let Or in the offset direction Od +BZ + C
-0 is newly calculated and the linear equation AbX +BbZ + C
b □ Set to 0 and store in buffer Bb (step S
8). Then, from the buffer Ba, the linear equation A, X + B
, Z + C□-0, the linear equation AbX÷BbZ +cb-0 is read out from buffer B, the intersection point CP (CX, II:2) of each straight line is calculated, and the point OPM (OX -, 01-) to the cutting path information creation section 4. At this time, a flag indicating that the offset has been made is turned on (step S9).

direction, traveling direction Ob and offset direction 0. If they do not match, check whether the flag indicating offset is on or off (step 510); if the flag is off, proceed to step 513; if the flag is on, buffer 7Bb
At the same time, read the linear equation AbX '' BbZ +Cb-0 from the buffer Ba, and read the linear equation Aax+Baz+ca from the buffer Ba.
'-o is read, and the intersection point CP (CK, CZ) of each straight line is
Calculate the offset shape point OP□(ox,,ozm
) is sent to the cutting path information creation section 4. At this time, a flag indicating that the offset has been made is turned off (step Sll). Then, the counter m is counted up (step S12), KPb (KXa, KZb)
is the point OP of the offset shape, (OXm, OZ,,,)
(Step 51)
3).

Then, the next point of the machining shape data is po−+ (to
n+! .

Check whether z,1) exists in step 514.
), if the next point KPn, , exists, read out Pb (KXb, KZb) and the linear equation A,

Z, ) and the linear equation A, On the other hand, must the following point KPn exist? ? ≧ ≧ Ku? ≧

Claims (1)

[Claims] 1. When creating numerical control information based on input machining information, the two A method for creating numerical control information, characterized in that a cutting path based on one of the tool cutting edge points is created as numerical control information. 2. In a numerical control information creation device that creates numerical control information based on input machining information, an offset is used to offset the machining shape of a machining process using a tool that has two tool cutting edge points that contact the workpiece. a first determining means that determines the distance from tool data; a second determining means that determines an offset direction and offset conditions for offsetting the machining shape of the process based on the cutting direction of the process; generating means for generating an offset shape by offsetting the machining shape of the process from the offset distance, offset direction, and offset conditions, the tool cutting edge of one of the two tool cutting edge points based on the offset shape A numerical control information creation device characterized in that a cutting path based on a point is determined and created as numerical control information.