JPH03131907A - Automatic programming device for numerical control - Google Patents

Abstract

PURPOSE:To execute the pocket working of a work on which the upper face height of an island-shaped part is varied by outputting numerical control data so that the island-shaped part is neglected when the height of a working face is higher than the upper face height of the island-shaped part. CONSTITUTION:The height of the working face is stored in a working face height storage 111 and its value is Zi. An island number crossing the island shape is outputted together with the coordinates of intersections on the start and end point sides when a working route crosses the island shape and the upper face heights Z1, Z2 or the like of the island are extracted from an island shape upper height storage 110 based upon the island number. When the working height Zi> island upper face height Z1, the working path does not cross the island shape 1 and the width of the island 1 is outputted to an output medium 109 as linear data through a data forming device 108. When Zi<=Z1, the working path crosses the island shape 1, a path to be worked is found out by an island cutting work path forming device 107 and numerical data canceling the cutting of the inside of the island 1 are outputted to the medium 109 through the data forming device 108.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic programming device for a numerical control device, and is particularly suitable for cutting an area of a workpiece in which part of the machining shape has an island-shaped portion that is not processed. The present invention relates to an automatic programming device for area cutting for creating data for numerical control. Area cutting is a process that cuts the entire surface of a certain area.
The shape of the region is called the region shape.

[Conventional technology]

In this type of automatic programming device for area cutting, a part of the area to be cut is defined as an island shape on the XYY plane within the area shape, and the area to be cut is set at a constant pitch. When the machining path of area cutting consisting of straight lines crosses the island shape, we create numerical control data that runs the machining path along the side of the island shape so as not to cut the inside of the island shape, so that the inside is not machined. It supports area machining of island-shaped workpieces.

FIG. 2 is a block diagram of a conventional automatic programming device for a numerical control device of this type.

Source data is input from an input medium 201 such as a keyboard, graphic elements are classified by internal code converter 202, and area shape data is stored in an area shape memory 204.
Each island shape data existing in the region shape data is sent to the island shape memory 203. Further, the amount of cutting pitch used when creating a processing path for processing the region shape is sent to the processing cutting pitch memory 205 and stored therein.

These memorized shapes are processed by the area cutting path generator 20.
6, the area cutting machining path creator 206 creates a machining path as shown in FIG.
This is an example having island shapes 1 and 2 inside, and shows a machining path 4 with a cutting pitch of 5). When the area cutting path creation device 206 creates a machining path, it is checked whether the machining path crosses the island shape on the XYY plane, and if it crosses the island shape, it cuts one point in FIG. The part represented by the chain line is the starting point side intersection coordinate (point a in island shape 1 in Figure 4), the ending point side intersection coordinate (point b in island shape 1 in Figure 4), and the island being crossed when crossing the island. number (for example, the number °゛1'' for island shape 1 is output.

The island cutting path creator 207 calculates a machining path for machining along the side surface of the island shape when the machining path created by the area cutting path creator 206 crosses the island shape, and sends it to the numerical control data creator 208. Numerical control data for avoiding cutting inside the island shape is output as an output medium 209. For example, the island cutting machining path generator 207 calculates a machining path for machining along the side surface of the island shape l between points a and b, and sends the machining path to the numerical control data generator 108 to obtain point a.

Numerical control data for avoiding cutting inside the island shape 1 between 5 is output as an output medium 209 such as a paper tape.

[Problem to be solved by the invention]

In the above-mentioned conventional automatic programming device for numerical control equipment, the cutting shape and island shape of the entire workpiece are defined only as an XY 1,000-screen shape, so the top surface height of the island is varied as shown in Figure 3. When performing pocket machining on a workpiece, numerical control data is created that avoids cutting inside all island shapes at any machining surface height, so it would normally have to be machined. There is a drawback that the part above the height of the island's top surface cannot be processed.

3(a) and (b) are a plan view (XY plane) and a longitudinal cross-sectional view (cut along the ZX plane) showing a processed shape having an island shape 1.2 within the region shape 3, and the height Z)l is the height of the surface of the workpiece, height2, . 22 each has an island shape 1
．． The height of the top surface of 2 and the height ZL indicate the height of the bottom surface of region shape 3.

[Means to solve the problem]

The automatic programming device for numerical control of the present invention is characterized in that the numerical control data is created so as to cut the entire area shape except for the island-shaped part whose upper surface is higher than the machined surface. The automatic programming device includes an area shape memory device that stores the region shape, an island shape memory device that stores the island shape, an island shape top surface height memory device that stores the height of the top surface of the island shape, and a cutting pitch. Create a machining path for area cutting with reference to a machining pitch memory device that stores the amount, the area shape, the island shape, and the pitch amount, and output the start and end points of the portion of the machining path that crosses the island shape. an area cutting machining path creator; a machining surface height memory storing the machining surface height of the machining path created by the area cutting machining path creator; Output data for numerical control of the machining path created by the island cutting path creator that creates a machining path along the side surface of the island shape between the starting point and the end point when the temperature is high, and the area cutting path creator. When the height of the top surface of the island shape is higher than the machining surface height, the machining path created by the island cutting path creator is used between the start point and the end point, and the area cutting process is performed for other machining paths. It has a numerical control data creator that outputs numerical control data created by the route creator.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. The parts other than the parts surrounded by dotted lines are the same as the conventional technique shown in FIG.

Source data is input from an input medium 101 such as a keyboard, graphic elements are classified by internal code converter 102, and area shape data is stored in an area shape memory 104.
Each island shape data existing in the region shape data is sent to the island shape memory 103. Then, data regarding the height of the island top surface in the island shape data at this time is sent to the island shape top surface height storage device 110 and stored therein. For example, in the case of a shape as shown in Fig. 3, the top surface height Zl of island shape 1 and island shape 2
The top surface height Z2 is stored in the island-shaped top surface height storage device 110. Further, the amount of cutting pitch used when creating a machining path for machining the region shape is sent to the machining pitch memory 105 and stored therein.

These memorized shapes are processed by the area cutting path creator 10.
A region cutting path creator 106, referred to as 6, creates a machining path 4 as shown in FIG. The machining surface height Zl of the machining path at this time is stored in the machining surface height memory 111. When the area cutting machining path creator 106 creates a machining path, it is checked whether the machining path crosses the island shape on the XYY plane, and if it crosses the island shape, that is, the fourth
The part represented by the dashed line in the figure is the starting point side intersection coordinate (point a in Figure 4) and the ending point side intersection coordinate (point a in Figure 4) when crossing the island shape.
The number of the island that crosses point b) in the figure is output.

The part that crosses the upper island of this XY thousand field surface, that is, the part indicated by the dashed line in
It is determined whether or not the island crosses the island shape when viewed from the axial direction. FIG. 5 shows an example of a case in which the machining path crosses the island shape in the height direction and a case in which it does not cross the island shape. FIG. 5<a) shows the case where the island shape is crossed in the height direction, and FIG. 5(b) shows the case where the island shape is not crossed in the height direction. 5th (2I, 6.10 is the workpiece, 7.11 is the area shape, 8.12 is the island shape 9.13
indicates the machined surface.

Specifically, the determination at this time is performed as follows. The height of the surface to be machined is stored in the surface height memory 111, and its value is Zi. In addition, since the number of the island that crosses the island shape on the XY plane is output together with the coordinates of the starting point and end point when the machining path crosses the island shape, the top surface height of the island shape is stored based on the island number. The height of the top surface of the island corresponding to the container 2. ．． Take out 22 etc.

Taking the point a and b shown in Figure 4 as an example, Zl > Z
, then the machining path does not cross the island shape 1, so the points a and b
The data between points a and b is sent to the numerical control data creator 108 as straight line data, and the numerical control data for adding the points a and b to the machining path is output as 10 output media such as paper tapes.

Also, if Z1≦71, the island shape 1 will be crossed, so the island cutting path creator 107 cuts the island shape 1 between points a and b.
A machining path for machining along the side surface is determined and sent to the numerical control data generator 108, where the numerical control data for avoiding cutting inside the island shape 1 between points a and b is outputted as an output medium 109 such as paper tape. Output.

These operations are created every time the height is changed at a predetermined interval, and the height ZL is changed from the height ZH of the shape shown in Figure 3.
Numerical control data for machining up to the surface is created.

〔Effect of the invention〕

As explained above, the present invention distinguishes the height of the machined surface during cutting and the height of the top surface of the island shape in conventional flat area cutting, and when the height of the machined surface is higher than the height of the top surface of the island shape, By outputting numerical control data that ignores the island-shaped part, the third
This has the effect of making it possible to perform boget processing on workpieces in which the heights of the top surfaces of island-shaped portions vary as shown in the figure.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a block diagram of a conventional automatic programming device for numerical control, and FIGS. A plan view and a cross-sectional view of an example, FIG. 4 is a diagram showing an example of the machining path, that is, the movement path of the tool in area cutting, and FIGS. 5 (a) and (b) show the machining surface height and the top surface height of the island shape. FIG. 2 is a diagram showing the relationship between the two, and is a diagram where the processed surface is lower than the top surface of the island shape, and a diagram where the processed surface is higher than the top surface of the island shape, respectively. 101.201... Input medium such as keyboard, 102
．． 202... Internal code converter, 103, 203...
・Island shape memory device, 104.204...Area shape memory device, 105,205...Processing cutting pitch memory device, 106
．． 206...Area cutting path creator, 107207
... Island cutting processing path creator, 108.208 ... Numerical control data creator, 109,209 ... Output medium such as paper tape, 110 ... Island shape top surface height memory device, 1
11... Machining surface height memory device, 112... Island shape top surface discriminator.

Claims (1)

[Scope of Claims] 1. An automatic programming device for numerical control, characterized in that numerical control data is created so as to cut the entire area shape except for the island-shaped part whose upper surface is higher than the machined surface. 2. Memorize the region shape, the island shape, and the height of the top surface of this island shape, and if the machining path for region cutting within the region shape crosses the island shape, the processing surface for region cutting will be the same as the island shape. When the height is higher than the top surface of the shape, the machining path directly crosses the island shape, and when the area cutting surface is lower than the height of the top surface of the island shape, the machining path does not cross the side surface of the island shape. An automatic programming device for numerical control, characterized in that it creates numerical control data in accordance with. 3. An area shape memory device that stores the region shape, an island shape memory device that stores the island shape, an island shape top surface height memory device that stores the height of the top surface of the island shape, and a cutting pitch amount. An area cutting processing path that creates a processing path for area cutting with reference to a processing cutting pitch memory device, the area shape, the island shape, and the pitch amount, and outputs the starting point and end point of a portion of the processing path that crosses the island shape. a processing surface height memory device that stores the processing surface height of the processing path created by this area cutting processing path preparation device; and a processing surface height memory device that stores the processing surface height of the processing path created by the area cutting processing path preparation device, and the starting point when the height of the top surface of the island shape is higher than the processing surface height. and an island cutting path creator that creates a machining path along the side surface of the island shape between and the end point, and outputs data for numerical control of the machining path created by the area cutting path creator, and outputs data for numerical control of the machining path created by the area cutting path creator, When the height of the upper surface is higher than the machining surface height, the machining path created by the island cutting path creator is used between the start point and the end point, and the area cutting path creator creates the machining path for other machining paths. An automatic programming device for numerical control characterized by comprising a numerical control data creator that outputs numerical control data of the created item.