Five-axis B-spline cutter path arc length parameterization method based on cutter axis stability

A stable and parametric technology, applied in the direction of digital control, program control, instruments, etc., can solve the problems of reducing the machining accuracy and surface quality of parts, uneven speed and acceleration, and speed fluctuations, so as to improve efficiency and reduce speed fluctuations. , the effect of avoiding shape defects
CN109062137AActive Publication Date: 2018-12-21HUAZHONG UNIV OF SCI & TECH +1
4 Cites 13 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2018-12-21

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the computer-aided machining related technology field, and discloses a five-axis B-spline cutter path arc length parameterization method based on the cutter axis stability. The method comprises the following steps that 1, cubic Bezier curves are established between every two adjacent cutter location points; 2, the cubic Bezier curves between every two adjacent cutter location points are subjected to isoparametric sampling to obtain cutter location point spline sampling points; 3, arc length parameters of the cutter location point spline sampling points are calculated to serve as arc length parameters of target sampling points of a six-dimensional space, and cutter axis vectors and arc length parameters of the cutter location points are calculated; 4, cutter axis point spline sampling points corresponding to the cutter location point spline sampling points are calculated, and then the target sampling points of the six-dimensional space are obtained; and 5, a target function is established according to the target sampling points of the six-dimensional space and the arc length parameters, and a five-axis B-spline cutter path subjected to nearly arc length parameterization is solved accordingly. According to the method, the speed fluctuation during machining is reduced, and the machining quality and efficiency are improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the related technical field of computer-aided processing, and more specifically relates to a method for parameterizing the arc length of a five-axis B-spline tool path based on the stability of the tool axis. Background technique

[0002] The tool trajectory of five-axis CNC machining is usually represented by a small line segment, and the tool trajectory represented by the small line segment has G1 and G2 discontinuities, and the speed and acceleration are not smooth during the machining process, thereby reducing the machining accuracy and surface quality of the part. In actual processing, a parameter curve with better continuity, such as a B-spline curve, is usually used to fit the tool trajectory represented by a small line segment.

[0003] Among them, the tool trajectory expressed by the B-spline curve has the following advantages: 1. The B-spline curve is composed of control points and node vectors. Using the B-spline cur...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More