JPH06161534A - Cutter pass inspecting method - Google Patents

Abstract

PURPOSE:To beforehand simulate the working status of parts by reading com mand data, NC machine constant files and tool information, respectively, deter mining the motions of a machine in accordance with an NC program every block and performing a drawing and a display. CONSTITUTION:Command data is read in a step (hereafter omitted) S1, machine information is read to realize a machine perculiar operations and NC machine constant files are read in an S2. In an S3, tool information for substituting tool operations for the machine operations is read and tool information files are read. In an S4, NC data files designated by the command data are searched and they are read one block by one block. In an S5, this NC data is decomposed into various kinds of codes for machine control and each code is digitized. Namely, the analysis of this NC data is performed. In an S6, the calcuation of the machine operations determining start point data and end point data, etc., one block by one block in this data is performed. In an S7, this calculation result is converted into drawing or display data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an NC cutter path verification method capable of performing a part machining simulation based on NC data.

[0002]

2. Description of the Related Art Conventional NCs for controlling NC machines
As shown in FIG. 2, the data is obtained from the NC program through its calculation processing, tool tip operation data (CL data), post processor processing, and NC data flow, and controls the NC machine. In this case, an NC program is created for each NC machine or for each model.
Software development for C data processing is required. Also,
The NC program was checked only by the operation of the tool tip using CL data.

In view of the above problems, the present invention provides, for example, 10
A cutter that can process NC data of any NC machine up to the axis NC machine with one software, and can reproduce the motion of the NC machine by using the NC data to enable pre-simulation of the machining situation of parts. The purpose is to provide a path verification method.

[0004]

According to the present invention for achieving the above object, an NC machine constant file is read in which command data is read and machine information is read in order to reproduce machine-specific movements. Read the tool information file to read the tool information to replace with the motion,
The NC data file specified by the above command data is searched and the NC data that is read block by block is read, the NC data is decomposed into various codes that control the machine, and the NC data that digitizes each code is analyzed. It is characterized in that the movement of the machine for calculating the start point data and the end point data for each block of 1 is calculated, and the calculation result is converted into drawing or display data.

[0005]

[Function] Even if the input items are the same due to differences in NC machine specifications of 4-axis, 5-axis, or 10-axis NC machines, the input numerical values are different, so new software development can be performed simply by setting the machine constant file for each model. Is unnecessary, and the movement of the machine is reproduced using the NC data, so that a pre-simulation can be performed on paper or on a three-dimensional graphic before trial cutting with the NC machine.

[0006]

EXAMPLE An example of the present invention will now be described with reference to FIG. FIG. 1 shows software for reproducing the movement of the NC machine, and shows a cutter path paper drawing program or a cutter path three-dimensional graphics display program. In FIG. 1, first of all, in the drawing program, data of drawing conditions are read, and in three-dimensional graphics display, data of display conditions are read. Here, the setting data (command data) of various conditions such as the file name of NC data in the database, tool vector display, tool diameter display, etc. is read.

Next, in order to reproduce the movement peculiar to the machine, the NC machine constant file, which is information such as the rapid feed rate of each axis, the home position position of each axis, the tool replacement method, the number of control axes, and the type, is read.

Next, in reading the tool information file, the tool No.
Information such as tool length, tool diameter, tool tip shape, and overall tool shape such as taper or straight is read.

In reading the NC data, the NC data file name specified by the drawing conditions and display conditions is searched for and the NC data is read block by block.

In the NC data analysis, the NC data (1 block) read by reading the NC data is NC.
The code (G code, M code, T code, X code, Y code, etc.) for controlling the machine is disassembled, and the numbers (characters) of each code are digitized.

Using the numerical values of the respective codes obtained in the NC data analysis, the movements of the machine such as the start point data and the end point data, the circular arc interpolation information, the tool No. information in use, etc., are calculated for each block of NC data. In this case, the start point data and the end point data are obtained by calculating the coordinate values (X, Y, Z coordinate values) of the tool tip and the tool vector from the NC data (machine control data at the pivot point). For this reason, the machining status of parts is reproduced by creating data in which the movement of the machine is replaced with the movement of the tool.

The machine motion data obtained by the calculation is converted into a plotter data for a paper drawing and a tertiary CAD / CAM display data for a three-dimensional graphic display, and the converted data is stored. Since steps 1 to 3 described above are performed for each block, they are repeated until all blocks are processed.

FIG. 3 shows an application example of the paper drawing applied to the pre-check of the created NC data before processing.
The circles and lines indicated by thin lines for the work piece indicate the cutter path, the tool tip trajectory of the fast feed of the thin line and the cutting feed of the broken line, and the progress arrow of the tool is attached. There is. Therefore, it is possible to visually confirm whether the tool is in contact with or cut into the surface of the part, and find out the shape defect of the NC program.

[0014]

As described above, according to the present invention, it is possible to perform a pre-simulation of a machining situation from NC data, and as a result, a shaving defect that occurs when the rotary shaft is moved and a swing (A axis, B axis, C axis). Reduces defects related to the shape and dimensions of parts such as shaving and drilling depth indication problems that occur due to linear interpolation definition defects during axis rotation). Moreover, even if the machine specifications change, it is not necessary to change the entire software to set the machine constant file.

[Brief description of drawings]

FIG. 1 is a flowchart of a cutter path drawing or display program.

FIG. 2 is a flowchart from an NC program to NC data.

FIG. 3 is an application diagram of a paper drawing example.

[Explanation of Codes] -Processing block.

Claims (1)

[Claims] 1. Reading of command data and machine information for reproducing machine-specific movements N
C Machine constant file read, tool information file for replacing machine movement with tool movement read tool information file, NC data file specified by the above command data is searched, and NC data is read block by block Reading, analyzing the NC data that decomposes this NC data into various codes for controlling the machine, and digitizing each code, calculating the movement of the machine to obtain the start point data and end point data for each block of this NC data, A cutter path verification method that converts the calculation result into drawing or display data.