JPH03168806A - Method for determining working range and device for forming numerical control program - Google Patents

Abstract

PURPOSE:To prevent the generation of rubbing or interference between an erected wall part formed by the precedent work and a tool by determining all working ranges by a working range data forming part so as not to generate rubbing or interference between an object to be worked and the tool. CONSTITUTION:A numerical control(NC) program forming device is constituted of a data input part 1, a work shape data storage part 2, a working information storage part 3, a working range reference data storage part 4, a (current working height) working range data formation part 5, a (current working height) working range data storage part 6, a (current working height) NC data formation part 7, an NC data storage part 8, and an NC data output part 9. The formation part 5 changes the working range in accordance with a coordinate value obtained at the time of regarding the rotational axis of a tool is a coordinate axis based upon the reference working range of the object to be worked to determine the working range. Consequently, the tool can be prevented from rubbing or interferring against/with a previous working trace (erected wall part, etc.).

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a machining range determining method that can prevent tool rubbing and roughness, and a numerical control program creation device that employs the machining range determining method.

゛(Prior art) Numerical control (NG) program creation equipment uses the rotation axis of the tool as the Z! This is a system that automatically generates a series of tool paths for machining a desired workpiece shape by controlling it based on the XY, Z, and XY lbs. M'i! It is.

Conventionally, when creating NG data using the NC program creation device, as shown in FIG.
Close the data creation range (processing range) on the X-Y plane.
A method has been used in which I is determined by the standard machining range defined by the 111 line Lc and two Z coordinate values (zH) and (zL).

(Problem to be Solved by the Invention) By the way, in the method for determining the machining range in the conventional NG program creation device described above, the machining range remains unchanged in the Z-axis direction, so zIIIth as shown in FIG.
A standing wall parallel to is formed. Therefore, two two-coordinate values (z.) . The larger the difference in (zL), the more
During processing such as machining from a block material such as a rectangular parallelepiped shape, for example, as shown in Figure 4 (B), there may be friction or collision (interference) between the machining standing wall of the block material and the tool.
This has caused problems such as deterioration and damage of materials and tools.

This is because in tools such as general ball end mills and flat end mills, there is a relationship (diameter of tool shaft ≧ diameter of tool blade), and the tool bends due to the load during machining.

The present invention was made in view of the above-mentioned circumstances, and an object of the present invention is to provide a machining range determining method that can prevent friction and interference between a vertical wall portion formed in a previous machining process and a tool, and a machining range determination method that can prevent NG. The objective is to provide a program creation device.

(Means for Solving the Problems) The present invention relates to a machining range determining method that can prevent tool rubbing and drying.
The rotation axis of the tool that processes the workpiece is regarded as a coordinate axis, and the machining range of the workpiece is defined by a closed +Ih line on a plane orthogonal to the coordinate axis, and By changing the coordinates of the seat (:'r'?'Feb) and determining the machining range throughout 4-J on the machining object, in order to avoid friction or interference. The present invention also achieves the following:
This invention relates to an NC program creation device that adopts the above machining range determination method, and the above object of the present invention is to create machining information that can be memorized by inputting information such as a machining range that becomes a reference when machining an object. Based on the input storage means and the reference processing range 21, the entire degree C of the processing object is determined.
a machining range data creation means that determines the machining range of and creates data, and an NC that creates NC data for each machining range created by the machining range data creation means.
a data creation means and an N for outputting the NC data to the outside;
In the NC program creation device comprising C data output means, the machining range data creation means is achieved by determining all of the machining ranges so as not to cause friction or interference between the workpiece and the tool. Ru.

(Function) In the present invention, the machining range is changed and determined based on the reference machining range of the workpiece, and the machining range is determined according to the coordinate values when the rotation axis of the tool is regarded as the coordinate axis. It is possible to prevent the object from rubbing against the tool or causing slow walking.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 2 is a block diagram of the structure of the NC program creation device of Wood Invention. To explain based on the figure, first, data on the shape of a desired workpiece to be machined is inputted via the data input section 1, and is stored in the workpiece shape data storage section 2. Similarly, via the data input unit 1, reference data for determining the machining range at each machining height (reference height ZO + closed} mountain line L indicating the NC data creation range at that height. Height change) The offset flea ratio C. of the closed curve L.) is input and stored in the machining range reference data storage section 4, and machining information such as tool diameter and machining direction is input and recorded in the machining information storage section 3.

(Current machining height) The machining range data creation unit 5 obtains the height Z for which NG data is to be created from the machining information storage unit 3 and the machining range reference data (zo, Lo) from the machining range reference data storage unit 4. .Go) is input, and the machining range (closed line) data L at the input machining height Z is calculated. Here, an example of a method for calculating this machining range data L will be explained in the first example.
This will be explained with reference to the figures. In other words, X- at the height Zo
Closed +Ib line L parallel to the Y plane.

With respect to the standard machining range defined by , the machining range at an arbitrary height 2 is a closed curve L. An offset closed curve L is defined in which the curve is narrowed or widened inward or outward by a constant width proportional to the height difference (z-2o).

When the machining range is defined in this way, there is no interference between the tool and the previously machined surface, as shown in FIG. 1(B). The machining range (closed curve) data L calculated as described above is stored in the machining range data storage section 6 (current machining height).

(Current machining height) NG data creation unit 7 stores data necessary to calculate NG data at the current machining height Z, such as height Z for creating NC data and machining range data L, in workpiece shape data storage. Part 2. Machining information storage section 3 and (current machining height)
The NC data at the current machining height Z is created by inputting data from the machining encirclement data storage unit 6. (Current machining height) The NC data created by the NC data creation section 7 is
, f1 section 8, and is further output to a floppy disk or the like via the NG data output section 9.

FIG. 3 is a flowchart showing the operating procedure of the present invention, and the procedure will be explained below. First, data on the shape of the desired workpiece to be machined is input via the data input section l.
Input the machining range standard data (zo.Lo, Co) and machining information, and write them to the workpiece shape data coloring section 2.
．． It is stored in the machining range reference data storage section 4 and the machining information storage section 3 (step 51). Next, the (current machining height) machining range data creation unit 5 inputs the machining start height from the machining information storage unit 3 as the current NG data creation height (current machining height) Z (step S2), and Range standard data storage section 4
Machining range standard data (Zo.Lo, Co)
The machining range data L at the input height Z is created using (current machining height) and stored in the machining range data storage section 6 (step S3).

(Current machining height) The NC data creation unit 7 inputs necessary data from the workpiece shape data storage unit 2, machining information storage unit 3, and (current machining height) machining range data storage unit 6, and determines the current NG. NC at data cutting height (current processing height) Z
Create data. The created NC data should be rejected once.
The data is stored in the data storage section 8 and further outputted to the outside of the apparatus via the NG data output section 9 (step S4).

It is determined whether NC data has been created for all the heights to be machined (step s5), and if there remains uncreated data, the next NG data creation height (machining height) is stored as machining information. Obtain it from the data in section 3 and set it as the current NC data creation height (current machining height) (Step S6
), if the process goes to step S3, the operation ends if all have been created.

(Effects of the Invention) As described above, according to the machining range determining method and NG program creation device of the present invention, the tool does not scratch the machining marks (vertical walls, etc.) of the workpiece (machining target) up to the previous machining height. No more interference and damage to workpieces and tools.
Alteration. It can prevent scratches etc.

[Brief explanation of the drawing]

1(A) and (B) are diagrams for explaining the machining range determination method of the present invention, FIG. 2 is a block diagram of the configuration of the NC program creation device of the present invention, and FIG. FIG. 4 is a flowchart showing the operating procedure, and is a diagram for explaining a conventional machining range determination method. 1... Data input section, 2... Workpiece shape data storage section, 3... Processing information storage section, 4... Processing box surrounding base l!
! ¥Data notation t0 part, 5... (current machining height) machining range data creation rN r'J<. 6 --- (+g.i
n+T −, 7. *) 11n pieces...1 day =;+
+n7...(current machining height) NC data creation section, 8...NG data storage section, 9...NC data output section. Appearing agent Yuzo (A) CB) Condolence 1 Reincarnation 3 eyes (,4) (β> Sheep 4 g

Claims (1)

[Claims] 1. The rotation axis of the tool for machining the workpiece is regarded as a coordinate axis, and the machining range of the workpiece is defined by a closed curve on a plane orthogonal to the coordinate axis, and the workpiece serving as a reference is The machining range determination is characterized in that all the machining ranges in the machining target are determined by changing the coordinate values of the coordinate axes to prevent rubbing or interference between the machining target and the tool. Method. 2. If the coordinate value of the coordinate axis corresponding to the reference processing range is z_o, then the processing range at any coordinate value z is made proportional to the difference (z−z_o) between those coordinate values, and 2. The machining range determining method according to claim 1, wherein the machining range is changed. 3. Processing information input storage means for inputting and storing information such as a processing range that serves as a reference when processing the processing object, and determining all processing ranges for the processing object based on the processing range that serves as the reference. a machining range data creation means for creating data as data, a numerical control data creation means for creating numerical control data for each machining range created by the machining range data creation means, and outputting the numerical control data to the outside. In the numerical control program creation device comprising a numerical control data output means, the machining range data creation means determines all of the machining ranges so as not to cause friction or interference between the machining object and the tool. A numerical control program creation device characterized by: