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Five-axis cutter length compensation method based on post-processing

A tool length compensation and post-processing technology, applied in instruments, computer control, simulators, etc., can solve problems such as tool length compensation without five-axis tool length compensation

Active Publication Date: 2015-03-25
SHANDONG UNIV OF TECH
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Problems solved by technology

[0008] The purpose of the present invention is to propose a five-axis tool length compensation method based on post-processing to solve the problem of tool length compensation for machine tools that do not have the five-axis tool length compensation function

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  • Five-axis cutter length compensation method based on post-processing
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  • Five-axis cutter length compensation method based on post-processing

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Embodiment Construction

[0023] The preferred embodiment of the five-axis tool length compensation method based on post-processing of the present invention includes:

[0024] A. Analyze the structure of the five-axis CNC machine tool of the designated swing head turntable;

[0025] By analyzing the specific structure of the machine tool (see figure 2 ), to obtain the kinematic relationship between the coordinate axes of the machine tool, that is, the kinematic chain of the machine tool. It is composed of rotary table, translational table, bed, spindle and tool in series, such as image 3 shown.

[0026] B. According to the structure of the five-axis CNC machine tool of the swing head turntable type, the kinematics model of the five-axis CNC machine tool is established, and the corresponding inverse kinematics calculation is performed;

[0027] In order to describe the movement between the coordinate axes of the machine tool, establish Figure 4 The machine coordinate system shown. in O m X m...

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Abstract

The invention discloses a five-axis cutter length compensation method based on post-processing. Firstly, the structure of a given five-axis numerical control machine tool is analyzed, and thus a kinetic model of the machine tool is established and solved; secondly, post-processing software having a five-axis cutter compensation function is developed based on a VisualC++ platform by using the macro-variable and the numerical operation function provided by a numerical control system; finally, the pendulum length of a cutter is regarded as a macro-variable and written into a numerical control program obtained after post-processing is conducted through the software, and thus the compensation for the length of the five-axis cutter can be conveniently achieved by modifying the macro-variable of the pendulum length in the numerical control program. By means of the five-axis cutter length compensation method, the problem of cutter compensation of machine tools which do not having the five-axis radius compensation function can be solved, the phenomenon that post-processing is conducted again on preposition cutter location data is avoided, and thus the reusability of the numerical control program is improved. It is proved through practice that by means of the method, the five-axis cutter compensation function can be conveniently achieved, cost is low, and high engineering application value is achieved.

Description

technical field [0001] The invention relates to a tool length compensation method for a multi-axis numerical control machine tool, in particular to a post-processing based five-axis tool length compensation method, which belongs to the field of five-axis numerical control machining. Background technique [0002] Tool length compensation is one of the important functions of modern computer numerical control system (CNC). In the three-axis CNC machining process, when the tool length changes, that is, the tool is worn or replaced with a new tool, at this time, the tool length compensation is realized by modifying the tool length value in the CNC system register and using the tool compensation function provided by the CNC system. The original CNC machining program can still continue to be used. However, in the five-axis CNC machining process, the tool length compensation method is relatively difficult to implement due to the constant change of the tool axis vector direction. A...

Claims

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Application Information

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IPC IPC(8): G05B19/404
CPCG05B19/404
Inventor 徐汝锋陈志同郭前建
Owner SHANDONG UNIV OF TECH
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