JPH0455911A - Checking method for nc machining program - Google Patents

Abstract

PURPOSE:To improve the accuracy and the efficiency for checking an NC machining program by overlampung a locus diagram printed and a tool locus set based on the data of the NC machining program with a reference diagram produced from a design drawing or its copy, and collating the positional relation of the tool locus and a machining area on the reference diagram. CONSTITUTION:A controller 2 reads the data recorded on an information medium and applies the arithmetic processing to the data. Then the controller 2 displays a stool locus set based on an NC working program and the additional machining information like the machining type, the machining depth, etc., on a CRT screen 3 and furthermore prints out he tool locus and the additional machining information through a plotter as a locus diagram 4. Then the diagram 4 is put on a reference diagram 5 with the light transmissive form turned upward. Thus the coincidence or discordance is confirmed between a tool locus line 4a drawn on the diagram 4 and a machining area line 5a of a work (w) set on the diagram. At the same time, the propriety of the additional machining information is decided. Thus, it is possible to accurately decide whether the tool locus is drawn as prescribed in a design drawing or not.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for inspecting an NC machining program created using a program creation device based on a design drawing of a workpiece.

(Prior art) Conventionally, in order to check whether the NC machining program can perform machining according to the design drawings, the tool trajectory and workpiece shape based on the data of the NC machining program are recorded on a CRT''.
Displays that are superimposed on the screen are known.
(See Publication No. 45).

(Problem to be Solved by the Invention) The above method can determine the relationship between the workpiece and the tool trajectory, but it is necessary to determine whether the tool trajectory is at the correct position relative to the workpiece according to the design drawing. It was difficult to do so, and there were problems with lack of accuracy.

In view of the above, an object of the present invention is to provide a method for inspecting an NC machining program that allows it to be clearly and accurately determined whether a tool trajectory matches a design drawing.

(Means for Solving the Problems) In order to achieve the above object, the present invention prints out a tool trajectory based on data of an NC machining program at the same magnification as a reference diagram consisting of a design drawing or a copy thereof, and At least one of the output trajectory diagram and reference diagram is made of transparent paper, and the trajectory diagram and the reference diagram are overlapped and compared.

(Operation) When the trajectory diagram and reference diagram are superimposed with the diagram made of transparent paper on top, the magnification of both diagrams is the same, so as long as the tool trajectory is as per the design drawing, The trajectory line of the tool matches the line of the machined part on the reference drawing, and it can be accurately determined whether the tool trajectory is as per the design drawing by looking at the degree of matching of the drawing lines.

(Example) An example of the method of the present invention will be described with reference to the drawings. First of all,
Handwritten or computer-aided design system (CAD system)
Create a design drawing of the workpiece (SL), then perform program coding based on the design drawing (S2), and input this into a program creation device using a keyboard etc. to create an NC machining program ( S3). Next, the data of the created NG machining program is recorded on an information medium 1 such as a floppy disk or a magnetic tape (S4), and this information medium 1 is input into the controller 2 of the NC machining machine.

The controller 2 reads the data recorded on the information medium, performs arithmetic processing, and displays machining incidental information such as the tool trajectory, machining type, and machining depth based on the NC machining program on the CRT screen 3 of the terminal (S5). ), and furthermore, the tool trajectory and machining incidental information are printed out as a trajectory diagram 4 using a plotter (SEi). The trajectory diagram 4 is printed out at the same magnification as the reference diagram 5 made of the design drawing or a copy thereof, and at least one of the trajectory diagram 4 and the reference diagram 5 is made of transparent paper.

Next, the locus diagram 4 and the reference diagram 5 are superimposed with the translucent paper facing upward, and the locus line 4a of the tool on the locus diagram 4 is
It is confirmed whether or not the line 5a of the processed part of the workpiece W on the reference diagram 5 matches, and it is also determined whether or not the processing incidental information is acceptable (S7). If the trajectory line deviates from the line of the machined part, the data is corrected according to the amount of deviation, printed out again, and compared with the reference drawing.

(Effects of the Invention) As is clear from the above explanation, according to the present invention, the NC
In order to compare the positional relationship between the tool trajectory and the machining part on the reference drawing by superimposing a trajectory diagram that prints out the tool trajectory based on the data of the machining program and a reference diagram consisting of a design drawing or a copy of the design drawing, It is possible to accurately determine at a glance whether or not the tool locus exists at a position that matches the design drawing, and the inspection of the NC machining program can be performed efficiently with high accuracy.

[Brief explanation of drawings]

The drawings are process diagrams showing one example of implementing the method of the present invention. 4...Trajectory diagram 5...Standard holding allowed
Applicant: Representative of Honda Motor Co., Ltd.
People Kin Kitamura - 3 people other than 1゛a

Claims (1)

[Claims] A method for inspecting an NC machining program created using a program creation device based on a design drawing of a workpiece, wherein a tool trajectory based on data of the NC machining program is inspected at the same magnification as a reference diagram consisting of a design drawing or a copy thereof. A method for inspecting an NC machining program, characterized in that at least one of the printed locus diagram and the reference diagram is made of transparent paper, and the locus diagram and the reference diagram are superimposed and compared.