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Small straight-line section interpolation method of numerical control system on basis of multicycle optimal corner

A numerical control system, small straight line technology, applied in general control system, control/regulation system, program control, etc., can solve the problem of not fully utilizing the maximum acceleration capacity of the drive shaft

Inactive Publication Date: 2009-10-14
ACAD OF MATHEMATICS & SYSTEMS SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

However, this method directly determines the machining trajectory of the tool at the corner, and also does not make full use of the maximum acceleration capability of each drive axis of the CNC machine tool

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  • Small straight-line section interpolation method of numerical control system on basis of multicycle optimal corner
  • Small straight-line section interpolation method of numerical control system on basis of multicycle optimal corner
  • Small straight-line section interpolation method of numerical control system on basis of multicycle optimal corner

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Embodiment Construction

[0058] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0059] First, see Figure 4 , specifically introducing several terms and concepts of the multi-period corner transition proposed by the present invention:

[0060] The idea of ​​multi-cycle optimal corner transition proposed by the present invention is to disperse the change of the processing speed direction at the corner originally realized in one interpolation cycle into a processing method that changes gradually in multiple interpolation cycles, and is used to improve the corner processing speed. It is limited by the maximum acceleration of each driving axis of the machine tool and the corner speed of the geometric parameters at the corner of the machined path. The corner here is the connection point of two adjacent small straight line segments that are not on...

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Abstract

The invention relates to a small straight-line section interpolation method of a numerical control system on the basis of multicycle optimal corner, comprising the following steps of: on the basis of processing precision and limitation of maximum processing speed, determining interpolation parameters of an optimal corner with multicycle trasition of each corner on a processing path according to geometric parameters at the corner on the processing path, the maximum acceleration of each driving shaft of a machine tool and an optimized target; adjusting the interpolation parameters of the optimal corner of each corner and leading the processing speed of two ends of each small straight-line section to meet reachability requirement; and then carrying out interpolation of straight line sections and corners to all the small straight-line sections on the processing path, connecting interpolate point sequences of the straight line sections with interpolate point sequences of corners, sequentially outputting the interpolate point sequences in real time, and driving a numerical control machine tool to conduct actual processing. The method can effectively improve the whole processing speed, has fast calculating speed, meets the requirement of real time processing, has stable and reliable working performance and strong practicability and can be applicable to various three-shaft numerical control machine tool with different types.

Description

technical field [0001] The invention relates to a small straight line segment interpolation method based on multi-period optimal corners of a numerical control system, belonging to the technical field of digital control processing of a numerical control system. Background technique [0002] When CNC machine tools process complex curved surfaces, they usually discretize the processed surface into a large number of small straight line segments within the set processing accuracy range. In the process of processing small straight line segments, the processing speed and processing accuracy of CNC machine tools restrict each other. Because during actual processing, the processing direction of the CNC machine tool needs to be changed frequently, causing the machine tool to start and stop frequently, which limits the processing speed and is prone to vibration, which affects the processing accuracy and surface finish of the processed surface. Especially at the corner, due to the sud...

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Application Information

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IPC IPC(8): G05B19/41
Inventor 李洪波张立先孙瑞勇高小山
Owner ACAD OF MATHEMATICS & SYSTEMS SCIENCE - CHINESE ACAD OF SCI
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