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Five-axis micro-line segment processing path smoothing method

A processing path and micro-line segment technology, applied in the direction of instruments, digital control, control/adjustment systems, etc., can solve the problems of increasing the difficulty of later interpolation calculations and discontinuity of the tool axis

Active Publication Date: 2020-01-21
TIANJIN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, the literature does not give the analytical solution of the maximum curvature of the outer transition curve, which will increase the difficulty of calculation in the later interpolation, and the use of a completely symmetrical transition curve, in the general case of transition, there is still a discontinuity of the tool axis Appear

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  • Five-axis micro-line segment processing path smoothing method
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  • Five-axis micro-line segment processing path smoothing method

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Embodiment Construction

[0075] In order to further understand the invention content, characteristics and effects of the present invention, the following embodiments are enumerated hereby, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0076] See Figure 1 to Figure 7 , a five-axis micro-segment machining path smoothing method, comprising the following steps:

[0077] Step 1. Read in the five-axis machining path code to obtain a series of coordinates of the tool nose point P i (X i , Y i ,Z i ), i=1, 2, 3...k, and the corresponding coordinates of the tool axis point P oi (X oi , Y oi ,Z oi ), i=1, 2, 3...k; establish a mathematical model of quartic B-spline curve;

[0078] Step 2, select three adjacent tool tip points in turn, P i (X i , Y i ,Z i ), P i+1 (X i+1 , Y i+1 ,Z i+1 ),P i+2 (X i+2 , Y i+2 ,Z i+2 ), i=1, 2, 3...k-2, using the four-degree B-spline curve mathematical model for three adjacent tool nose points to smooth the processin...

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Abstract

The invention discloses a five-axis micro-line segment processing path smoothing method. The method comprises the following steps of: reading a five-axis processing path code to obtain a series of tool nose point coordinates Pi (Xi, Yi and Zi) and corresponding tool axis point coordinates Poi (Xoi, Yoi and Zoi), wherein i is equal to 1, 2 and 3 to k, and i is equal to 1, 2 and 3 to k; establishinga quartic B-spline curve mathematic model; and 2, sequentially selecting three adjacent tool nose points, carrying out processing path smoothing on the three adjacent tool nose points by adoption ofthe quartic B-spline curve mathematic model, sequentially selecting three adjacent tool axis points, and carrying out processing path smoothing on the three adjacent tool axis points by adoption of the quartic B-spline curve mathematic model. According to the method, an external transition form is adopted in application, so that a transition curve can obtain a smaller curvature extreme value; andthe curvature maximum value of the transition curve of the tool nose points is reduced, so that the processing path is smooth.

Description

technical field [0001] The invention relates to a smoothing method in mechanical manufacturing technology, in particular to a five-axis micro-line segment processing path smoothing method. Background technique [0002] At present, five-axis CNC machine tools are widely used in the field of high-speed and high-precision machining, such as mold making and complex curved surface machining, because of their easy clamping, high production efficiency, and strong flexibility. For five-axis modern industrial product modeling design, parametric curves are used more and more, but because most of the CAM software used to generate NC machining codes cannot directly generate parametric curves, so a large number of micro-line segments are used in most cases To approximate the parametric surface used in the design, so as to realize the production machining of five-axis complex workpieces. However, the method of processing curves and surfaces with micro-line segments will bring disadvantag...

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Application Information

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IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/35349
Inventor 王太勇张永宾董靖川刘杨帆彭鹏
Owner TIANJIN UNIV