Numerical control system-based tool radius compensation vector calculating method

A tool radius, numerical control system technology, applied in the numerical control field, can solve the problems of limited application scope and unfavorable promotion.

Inactive Publication Date: 2013-05-01
FUJIAN UNIV OF TECH
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  • Numerical control system-based tool radius compensation vector calculating method
  • Numerical control system-based tool radius compensation vector calculating method
  • Numerical control system-based tool radius compensation vector calculating method

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Embodiment Construction

[0032] The invention proposes a vector calculation method for tool radius compensation in CNC system machining. In this method, in order to reduce the calculation amount of the tool center transition point and ensure the accuracy of interpolation processing, it is first necessary to extract the relevant data of tool compensation such as tool radius, tool compensation direction and coordinates from the interface file of the decoding module etc. After determining the line segment type, apply different calculation methods to obtain the corresponding direction vector. Secondly, use the direction vector of the straight line or arc to calculate the transition angle between the two line segments. After determining the transition angle, you can combine the previous tool compensation information to determine the transition type between the two programmed trajectories. Finally, use the tool radius vector and direction vector to obtain the straight line or arc equidistant line, and combi...

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Abstract

The invention provides a numerical control system-based tool radius compensation vector calculating method which comprises the steps of: judging different switching-over types through analyzing the distribution condition of a vector angle of a tangent line on the switching-over point of a processing segment on a plane coordinate system, and calculating the coordinate point after cutter compensation according to a specific computing method; analyzing the processing segment according to the information of the tool radius, the cutter compensation direction and a workpiece outline coordinate point and the like after collecting and processing the information of a to-be-processed workpiece, calculating vectors of two tangent lines on the switching-over point, and obtaining a switching-over angle of two straight lines according to the vectors of the two tangent lines, drawing the distribution condition of the switching-over angle in the plane coordinate system, and judging the switching-over type of the two straight lines so as to figure out coordinates of the switching-over point by adopting a vector calculating method; and sending information of the coordinates to a numerical control system for next step of interpolation. The numerical control system-based tool radius compensation vector calculating method has the advantages of being simple in calculating method and small in calculating quantity, and being beneficial to the realization of programming especially for the calculation of the switching-over point, thereby increasing the processing efficiency.

Description

【Technical field】 [0001] The invention belongs to the technical field of numerical control, and in particular relates to a vector calculation method for tool radius compensation in a numerical control system. 【Background technique】 [0002] Numerical control system is the abbreviation of numerical control system (Numerical Control System). According to the control program stored in the computer memory, it executes part or all of the numerical control functions, and is equipped with a dedicated computer system with interface circuits and servo drives. The action control of one or more mechanical equipment is realized by using digital instructions composed of numbers, words and symbols. It usually controls mechanical and switching quantities such as position, angle, and speed. After the 1970s, separated hardware electronic components were gradually replaced by more integrated computer processors, called computer numerical control systems. [0003] Computerized numerical contr...

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Application Information

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IPC IPC(8): G05B19/404
Inventor 聂明星蒋新华陈青霞陈兴武邵明李光炀
Owner FUJIAN UNIV OF TECH
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