Method of generating a numerical control program, apparatus for the same, and program for causing a computer to execute the method

Patent metadata

Field	Value
Publication number	US-9389605-B2
Application number	US-201013698899-A
Country	US
Kind code	B2
Filing date	May 20, 2010
Priority date	May 20, 2010
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

In a method of generating a numerical control program in which, based on sectional shape data of a product to which a relief processing is to be performed, a numerical control program for turning-processing the product is generated in order to recognize a groove shape data existing in the vicinity of a corner as a relief sectional shape, wherein groove shape data is extracted from the sectional shape data, an intersection of a line segment parallel to a turning axis and a line segment that is not parallel to the line segment is calculated as a corner of the sectional shape data, and the groove shape data is recognized as a relief sectional shape in a case where dimensions of a frame which includes from the corner to the groove shape data are within predetermined dimensions.

First claim

The invention claimed is:

1. A method of generating a numerical control program in which, based on sectional shape data of a product to which a relief processing is to be performed, a numerical control program for turning-processing the product is generated, the method comprising:
extracting, by a processor, groove shape data from the sectional shape data;
calculating, by a processor, an intersection of a line segment parallel to a turning axis and a line segment that is not parallel to the line segment as a corner of the sectional shape data;
determining dimensions of a frame from the calculated corner to the groove shape data;
recognizing the groove shape data as a relief sectional shape in response to the determined dimensions of the frame being within predetermined dimensions such that the extracted groove shape is in a vicinity of the corner without overlapping with the corner;
determining a relief shape pattern of the recognized relief sectional shape from among a plurality of relief shape patterns which are processed by a turning tool bit based on whether the relief sectional shape is equal to or larger than the corner in at least one direction;
generating a relief processing program corresponding to the determined relief shape pattern; and
integrating the relief processing program into the numerical control program for the turning-processing.

2. The method of generating a numerical control program according to claim 1 ,
wherein the plurality of relief shape patterns comprise a first shape pattern in which a line segment configuring a groove shape is connected to the line segment parallel to the turning axis, a second shape pattern in which the line segment configuring the groove shape is connected to the line segment that is not parallel to the line segment parallel to the turning axis, and a third shape pattern in which the line segment configuring the groove shape is connected to the line segment parallel to the turning axis and the line segment that is not parallel to the line segment parallel to the turning axis.

3. The method of generating a numerical control program according to claim 1 ,
wherein the determination of the relief shape pattern is performed based on a distance of the relief sectional shape to the corner of the sectional shape data.

4. A method of generating a numerical control program according to claim 1 ,
wherein the determination of the relief shape pattern is performed based on a direction of a vector perpendicular to an in-material additional straight line segment that closes the relief sectional shape.

5. A non-transitory computer readable medium storing a program for causing a computer to execute a method of generating a numerical control program in which, based on sectional shape data of a product to which a relief processing is to be performed, a numerical control program for turning-processing the product is generated, the method comprising:
extracting groove shape data from the sectional shape data;
calculating an intersection of a line segment parallel to a turning axis and a line segment that is not parallel to the line segment as a corner of the sectional shape data;
recognizing the groove shape data as a relief sectional shape in a case where dimensions of a frame which includes from the corner to the groove shape data are within predetermined dimensions such that the extracted groove shape is in a vicinity of the corner without overlap with the corner;
determining a relief shape pattern of the recognized relief sectional shape from among a plurality of relief shape patterns which are processed by a turning tool bit based on whether the relief sectional shape is equal to or larger than the corner in at least one direction;
generating a relief processing program corresponding to the determined relief shape pattern; and
integrating the relief processing program into the numerical control program for the turning-processing.

6. An apparatus for generating a numerical control program which, based on sectional shape data of a product to which a relief processing is to be performed, generates a numerical control program for turning-processing the product, the apparatus comprising:
a memory configured to store the section shape data of the product; and
a processor configured to:
execute a relief shape determining unit which extracts groove shape data from the sectional shape data, wherein the relief shape determining unit calculates an intersection of a line segment parallel to a turning axis and a line segment that is not parallel to the line segment as a corner of the sectional shape data, determines dimensions of a frame from the calculated corner to the groove shape data, and recognizes the groove shape data as a relief sectional shape in response to the determined dimensions of the frame being within predetermined dimensions such that the extracted groove shape is in s vicinity of the corner without overlapping with the corner;
execute a relief shape pattern determining unit which determines a relief shape pattern with respect to the recognized relief sectional shape from among a plurality of relief shape patterns which are processed by a turning too bit based on whether the relief sectional shape is equal to or larger than the corner in at least one direction;
execute a relief processing program producing unit which generates a relief processing program corresponding to the relief shape pattern that is determined by the relief shape pattern determining unit; and
integrate the relief processing program into the numerical control program for turning-processing the product.

7. An apparatus for generating a numerical control program according to claim 6 ,
wherein the plurality of relief shape patterns comprise a first shape pattern in which a line segment configuring a groove shape is connected to the line segment parallel to the turning axis, a second shape pattern in which a line segment configuring a groove shape is connected to the line segment that is not parallel to the line segment parallel to the turning axis, and a third shape pattern in which a line segment configuring a groove shape is connected to the line segment parallel to the turning axis and the line segment that is not parallel to the line segment parallel to the turning axis, such that each of the first pattern, the second pattern, and the third pattern includes the relief sectional shape which is within the predetermined distance from the corner and does not overlap the corner and wherein the first pattern, the second pattern, and the third pattern are executed by the turning tool bit.

8. An apparatus for generating a numerical control program according to claim 6 ,
wherein the relief shape pattern determining unit determines the relief shape pattern from a positional relationship of the relief sectional shape with respect to the corner of the sectional shape data.

9. An apparatus for generating a numerical control program according to claim 6 ,
wherein the relief shape pattern determining unit determines the relief shape pattern from a direction of a vector perpendicular to an in-material additional straight line segment that closes the relief sectional shape.

10. The method of generating the numerical control program according to claim 1 , further comprising: generating the numerical control program for continuous processing by a turning tool bit by integrating processing of the relief section shape and tuning processing program.

11. The method of generating the numerical control program according to claim 1 , wherein the relief section shape comprises shape data in which the extracted groove shape is in the vicinity of the corner without overlap with the corner an

Assignees

• Matsuura Mahito
• Kamiya Takashi
• Takahashi Nobuyuki
• Matsubara Susumu
• Mitsubishi Electric Corp

Inventors

• Matsuura Mahito
• Kamiya Takashi
• Takahashi Nobuyuki
• Matsubara Susumu

Classifications

• G05B19/4097 Primary

  characterised by using design data to control NC machines, e.g. CAD/CAM (G05B19/4093 takes precedence) · CPC title

• G05B2219/35118

  Generate intersection of offset surfaces · CPC title