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Numerical control machining track smoothing method based on B spline curve fitting

A trajectory smoothing and spline curve technology, applied in the direction of digital control, program control, comprehensive factory control, etc., can solve the discontinuous requirements of speed, acceleration and curvature, it is difficult to achieve high-precision trajectory processing and processing, and it cannot respond well and other issues, to achieve the effect of improving operating performance, high applicability, and convenient operation and handling

Pending Publication Date: 2022-05-27
CENT SOUTH UNIV +1
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Problems solved by technology

[0002] In traditional CNC machine tools, multiple data points are often constructed into spline curves for analysis. When analyzing data points, some precision effects often occur, so that there are more errors between the generated trajectories and cannot respond well. The original shape leads to discontinuous parameters such as speed, acceleration, and curvature requirements during processing, which causes vibration of the machine tool, making it difficult to achieve high-precision processing and processing of the trajectory

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  • Numerical control machining track smoothing method based on B spline curve fitting
  • Numerical control machining track smoothing method based on B spline curve fitting
  • Numerical control machining track smoothing method based on B spline curve fitting

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[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] see Figure 1-4 , a trajectory smoothing method for CNC machining based on B-spline curve fitting, the trajectory smoothing method comprising the following steps:

[0032] S1. Using conditions such as the angle limitation of adjacent line segments, identify and delete some problem points, and complete the processing of the original data points.

[0033] S2. Process the discrete curves, and judge and select important interpola...

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Abstract

The invention relates to the technical field of laser cutting numerical control machining, and discloses a track smoothing method for numerical control machining based on B spline curve fitting, and the track smoothing method comprises the following steps: S1, recognizing and deleting a part of problem points by adopting conditions such as included angle limitation of adjacent line segments, and completing the processing of original data points; and S2, the discrete curve is processed, interpolation points are selected according to curvature and other conditions, self-adaptive adjustment can be carried out according to curvature limitation and the like of the discrete curve, and a curve with relatively high precision can be constructed with relatively few interpolation points. The track smoothing method for numerical control machining based on B spline curve fitting can be suitable for a motion system needing track processing, fitting processing of spline data machining points is facilitated, the error influence caused by curvature can be reduced in data fitting, meanwhile, the system accuracy is improved, data points are convenient to operate and process, and the method is suitable for large-scale popularization and application. The requirement of a machine tool for track smoothness is met, and operation performance is improved.

Description

technical field [0001] The invention relates to the technical field of laser cutting numerical control machining, in particular to a trajectory smoothing method for numerical control machining based on B-spline curve fitting. Background technique [0002] In traditional CNC machine tools, multiple data points are often constructed into spline curves for analysis. When analyzing the data points, some accuracy effects are often produced, so that there are more errors between the generated trajectories and cannot respond well. The original shape leads to discontinuous parameters such as speed, acceleration, and curvature requirements during processing, which causes vibration of the machine tool, and it is difficult to achieve high-precision processing and processing of the trajectory. [0003] Therefore, for the processing process between some trajectories, a method based on B-spline curve fitting is proposed, which can reduce the error and improve the effect of curve fitting a...

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Application Information

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IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/35349Y02P90/02
Inventor 黄鑫但汉兵宋俊杰刘新
Owner CENT SOUTH UNIV
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