Track smoothing method suitable for five-axis numerical control device

A numerical control device and trajectory smoothing technology, applied in the field of numerical control

Active Publication Date: 2012-03-28
SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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Problems solved by technology

[0005] The purpose of the present invention is to solve the defects caused by the traditional interpolation algorithm of the existing five-axis numerical control device, and propose

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  • Track smoothing method suitable for five-axis numerical control device
  • Track smoothing method suitable for five-axis numerical control device
  • Track smoothing method suitable for five-axis numerical control device

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Embodiment Construction

[0052] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0053] like figure 1 Shown overall flowchart, the steps that the present invention takes are as follows:

[0054] Recognition of processing trajectory: Read a sequence of CNC command points continuously, and identify the part that satisfies smooth curve interpolation conditions by calculating and analyzing factors such as the length, angle, and bow height error between the program segments formed by the command points

[0055] Estimation of interpolation points: For the part that satisfies the smooth curve interpolation in the above steps, the position of the interpolation point is estimated between adjacent instruction points as the correction instruction point, so that the spline curve constructed by the interpolation point is closer to the expectation curve.

[0056] Cue point parameterization: Before constructing a smooth curve, each cu...

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Abstract

The invention relates to a five-axis numerical control processing technique for complex curved surfaces, in particular to a tracking smoothing method suitable for a five-axis numerical control device, which belongs to the technical field of numerical control. The method comprises the following steps of: 1, continuously reading a segment of numerical control command point sequence, and identifying a program segment which satisfies a smooth curve interpolation condition; 2, estimating the positions of interpolation points between adjacent command points, and taking the positions as first-time correction command points; 3, parameterizing the first-time correction command point; 4, generating second-time correction command points, and determining first-order derivative vectors and second-order derivative vectors of the second-time correction command points; and 5, constructing a quintic spline curve for each coordinate component of adjacent second-time correction command points respectively, connecting the quintic spline curves into an integral smooth curve, and performing curve interpolation on the smooth curve. By means of the method, the processing efficiency and the processing accuracy of the five-axis numerical control device are increased, and a turning phenomenon caused by broken line tracks is eliminated.

Description

technical field [0001] The invention relates to a five-axis numerical control machining technology for complex curved surfaces, specifically a track smoothing method suitable for a five-axis numerical control device, and belongs to the technical field of numerical control. Background technique [0002] Five-axis CNC machining technology has become the mainstream trend of modern CNC development because of its ability to process complex curved surface parts. It has a decisive influence on a country's aviation, aerospace, military, scientific research, precision instruments, high-precision medical equipment and other industries that are related to the lifeline of the country. In five-axis CNC machining, due to the continuous increase in the complexity of the workpiece, the programming function of the CNC device itself cannot simply meet the needs of processing. Modern CNC devices need to complete the processing with the assistance of CAD / CAM systems. [0003] When the CAD / CAM ...

Claims

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Application Information

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IPC IPC(8): G05B19/4097
Inventor 于东赵世强张晓辉耿聪张富彦郑飂默
Owner SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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