Control method for motion mutation phenomenon in compensation of five-axis face milling cutter

A technology of tool compensation and mutation phenomenon, which is applied in the direction of program control, computer control, general control system, etc., and can solve the problems of increased change in the previous interval and decreased processing speed, etc.

Active Publication Date: 2014-12-31
SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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Problems solved by technology

For the sudden change of the radius compensation vector, some processing methods are to assign the radius compensation vector in the current interpolation cycle to the radius compensation vector in the previous interpolation cycle to eliminate this type of singular point, but after simply using this method, The sudden change in the current processing interval is eliminated, but the change in the previous interval may increase
Some processing methods are to directly perform linear interpolation, but if this method is used for all cases, the processing speed will be seriously reduced

Method used

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  • Control method for motion mutation phenomenon in compensation of five-axis face milling cutter
  • Control method for motion mutation phenomenon in compensation of five-axis face milling cutter
  • Control method for motion mutation phenomenon in compensation of five-axis face milling cutter

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Embodiment Construction

[0056] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0057] figure 1 It is a flow chart of the method of the present invention. As shown in Figure 2, there are three kinds of common knives-ball-end knives, flat-bottomed knives and ring knives. Let p be the position vector of the cutting point, o be the position vector of the tool center point, n be the normal vector of the machined surface, u be the direction vector of the tool axis, and r be the radius compensation vector. Among them, the surface normal vector, tool axis vector and compensation vector are all unit vectors. R 1 is the cutter radius of the ball-end cutter, R 2 is the tool radius of the flat bottom knife, R 3 is the tool radius of the annular knife, R 4 is the cutting edge radius of the ring knife.

[0058] The general formula of ball nose cutter radius compensation vector is:

[0059] r=n (1)

[0060] The general formula...

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Abstract

The invention relates to five-axis machining technology in the technical field of numerical control, in particular to a control method for a radius compensation vector mutation phenomenon in the process of compensation of a five-axis face milling cutter. The method includes the following steps: judging whether the radius compensation vector of a current point is a zero vector or not, calculating whether an included angle of radius compensation vectors of adjacent points is less than an allowable value or not, judging whether a profile type of a cutter shaft changes or not, and dealing with singular points and mutation phenomena of nearby areas. The method is based on whether the included angle of radius compensation vectors of adjacent points is beyond the allowable value or not to judge the mutation phenomena, and the judgment is more accurate. The handling method can not only eliminate the mutation phenomena of the radius compensation vectors near the singular points, but also can not reduce processing speed as far as possible.

Description

technical field [0001] The invention relates to a five-axis machining technology in the technical field of numerical control, in particular to a method for controlling sudden changes in radius compensation vectors in the compensation process of five-axis end milling tools. Background technique [0002] In five-axis machining, the application of the 3D tool radius compensation function can make the CNC program independent of the tool radius. When the tool radius is slightly changed due to wear and other reasons compared with the standard tool (the radius used for tool path planning in CAM), no need Regenerate tool position files, thereby improving efficiency and reducing processing costs. However, when the tool axis direction vector is collinear with the normal vector, the solution of the radius compensation vector cannot be obtained by the general formula, so it becomes a singular solution, and the machining point also becomes a singular point. When the end milling process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/404
Inventor 林浒王峰郑飂默陈龙张函杨磊
Owner SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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