Compensation method of radius of tool for triaxial numerical control machine based on curve surface reconstruction

A tool radius and CNC machine tool technology, which is applied in the direction of program control, computer control, general control system, etc., can solve the problems of inability to perform tool compensation on-line and loss of geometric information on the processed surface, so as to achieve good promotion and application prospects, improve production efficiency, The effect of improving calculation accuracy

Inactive Publication Date: 2009-12-30
ACAD OF MATHEMATICS & SYSTEMS SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

When the tool radius changes, the coordinates of the contact point can be calculated according to the tool position point and radius compensation vector in the extended G01 code, and a new tool position point can be generated according to the changed too

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  • Compensation method of radius of tool for triaxial numerical control machine based on curve surface reconstruction
  • Compensation method of radius of tool for triaxial numerical control machine based on curve surface reconstruction
  • Compensation method of radius of tool for triaxial numerical control machine based on curve surface reconstruction

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Embodiment Construction

[0013] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0014] The invention is a tool radius compensation method for a three-axis CNC machine tool based on curved surface reconstruction in a numerical control system. The method generates a tool path based on the sectional plane method, that is, the tool position trajectory is planned on a group of parallel planes (usually a group of On the plane perpendicular to the xoy plane), the NC machining program with compensation parameters is generated through post-processing; the specific method is: first analyze the G01 code in the NC machining program, extract all the tool points, and realize the machining surface where the tool points are located After the quick reconstruction of , calculate the unit normal vector of each tool position point on the surface where the tool po...

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Abstract

The invention relates to a compensation method of the radius of a tool for a triaxial numerical control machine tool based on curve surface reconstruction, which generates a tool path based on a cutting plane, namely plans the tool path on a group of parallel planes, and then generates numerical control processing program with compensation parameters by post processing; the compensation method comprises the detailed steps: analyzing a G01 code in the numerical control processing program, extracting all tool location points, realizing the fast reconstruction of processing curved surfaces of the tool location points, respectively calculating unit normal vector of each tool location point on the curved surfaces of the tool location points, saving the unit normal vector of each tool location point in the G01 code of the tool location point as tool radius compensation vector, and constructing an extended G01 code; when the tool radius changes, calculating a cutting contact point coordinate by the tool location point and radius compensation vector in the extended G01 code, generating new tool location points according to the changed tool radius, and realizing real-time compensation of the tool radius in the triaxial numerical control processing process; and the compensation method solves the problem that the tool can not be compensated by online due to loss of geometric information of processing curve surfaces.

Description

technical field [0001] The invention relates to a radius compensation method for a tool of a three-axis numerically controlled machine tool based on curved surface reconstruction, and belongs to the technical field of digital control systems in numerically controlled machine tools. Background technique [0002] At present, three-axis CNC machine tools have been widely used in many mechanical manufacturing fields. However, since the CNC system of this type of machine tool cannot automatically compensate the tool radius wear in the process of machining, the programmer must first determine the tool used for machining when using the G01 command or code to program the CNC machining program. Tool type and parameters, that is, each NC machining program can only correspond to a tool with one parameter. Moreover, even for the same processing object, when the tool changes its radius size due to wear or other reasons, the machining program must be reprogrammed according to the current...

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Application Information

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IPC IPC(8): G05B19/404
Inventor 韩丽高小山李洪波张立先
Owner ACAD OF MATHEMATICS & SYSTEMS SCIENCE - CHINESE ACAD OF SCI
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