Curved surface part numerical control machining positioning method

A positioning method and a technology of curved surface parts, which are applied in metal processing, metal processing equipment, metal processing machinery parts, etc., can solve the problems of increasing the manufacturing and processing costs of curved surface parts and finding processing references, and achieve the goal of improving processing accuracy and processing efficiency Effect

Inactive Publication Date: 2019-02-12
WUHU CHANGRUI AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of NC machining, for curved surface parts with complex external shapes, because the datum plane is not accurately machined, it brings great difficulties to find the machining datum before NC machining
In the case that the curved surface parts belong to a single piece or the batch size is small, if a special fixture is used for the curved surface parts, the manufacturing and processing costs of the curved surface parts will be greatly increased

Method used

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Examples

Experimental program
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Embodiment Construction

[0017] A numerical control machining positioning method for curved surface parts is characterized in that it comprises the following steps:

[0018] 1) Determine the coordinate system of the part according to the processing characteristics of the CAD model of the part, and preliminarily determine the type and tool path of the machining tool according to the size and machining accuracy of the blank;

[0019] 2) Determine the spatial coordinate system of the machine tool according to the basic information of the machine tool;

[0020] 3) According to the process information of the part, the CAD model information and the position information of the machine tool, the position and attitude of the part coordinate system in the machine tool coordinate system are given, and according to the processing range of the machine tool, the parts are partitioned and planned independently in each partition. The processing path is mapped to the machine tool coordinate system;

[0021] 4) Determ...

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PUM

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Abstract

The invention discloses a curved surface part numerical control machining positioning method. The method is characterized by comprising the following steps that 1, a coordinate system of a part is determined according to machining features of a part CAD model, and the type and path of a tool are determined primarily according to the size and machining precision of a blank; 2, according to basic information of a machine tool, a space coordinate system of the machine tool is determined; 3, the position and posture of the part coordinate system in the machine coordinate system are given, the partis subjected to district planning according to the machining range of the machine tool, and an independent machining path is planned in each district and mapped into the machine tool coordinate system; 4, according to the part coordinate system and the machine space coordinate system, a practical tool path is determined, the posture error of the tool relative to the workpiece is predicted according to an error model and the practical tool path, the tool path is optimized, and a numerical control program is automatically generated. The machining precision and machining efficiency can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of numerical control machining of parts, and in particular relates to a positioning method for numerical control machining of curved surface parts. Background technique [0002] In the process of NC machining, for curved surface parts with complex external shapes, since the datum plane is not accurately machined, it brings great difficulties to find the machining datum before NC machining. In the case that the curved surface parts belong to a single piece or the batch is small, if a special fixture is used for the curved surface parts, the manufacturing and processing costs of the curved surface parts will be greatly increased. Contents of the invention [0003] The object of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a method for NC machining and positioning of curved surface parts. [0004] The present invention is achieved through the following t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q15/22
CPCB23Q15/22
Inventor 张良成
Owner WUHU CHANGRUI AUTO PARTS
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