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Designing method of feeding speed postprocessor used for multi-axis linkage electrosparking

A technology of feed speed and multi-axis linkage, applied in the direction of electric processing equipment, metal processing equipment, circuits, etc., can solve problems such as unreasonable, unknown rotation radius of the rotation axis of the electrode and the workpiece, etc.

Active Publication Date: 2016-06-08
SHANGHAI JIAO TONG UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

In the servo control with the participation of the rotating shaft, the numerical control system does not know the size of the rotation radius of the rotating shaft of the electrode and the workpiece, which causes a gap between the actual feed amount and the feed amount required by the empirical formula
In this case, with the same angular velocity, it is extremely unreasonable to perform the same treatment when the radius of rotation of the processing point is different

Method used

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  • Designing method of feeding speed postprocessor used for multi-axis linkage electrosparking
  • Designing method of feeding speed postprocessor used for multi-axis linkage electrosparking
  • Designing method of feeding speed postprocessor used for multi-axis linkage electrosparking

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Embodiment

[0033] According to the measurement, the reference rotation radius of the selected workpiece is 120mm, and the reference rotation radius of the machining tool electrode is 27.5714mm.

[0034] Introduce a speed ratio for each axis, since the A axis does not move, the movement ratio of X, Y, Z and A is set to 1. Calculate the motion ratio of the two rotating axes by formula (3), where k B =0.4774648,k C = 2.0780874.

[0035] Then use the rotation axis coefficient based on the above results to read the G code line by line from the first line, and calculate the movement amount of each movement axis of each line of G code, and calculate the motion proportional coefficient k of the line of G code by weighted average method, The calculated value range of k is (0.4775, 1.6185).

[0036] From the first line of G code, the original processing speed is calculated as F10 according to the empirical formula line by line. After multiplying by the motion proportional coefficient k, the val...

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Abstract

The invention relates to a designing method of a feeding speed postprocessor used for multi-axis linkage electrosparking. For multi-axis linkage electrosparking machining in which rotary axes are involved, the control object is the relative distance between an electrode and a workpiece, and the unknown radiuses of the rotary axes cause fluctuation of the machining speed. From models of the electrode and the workpiece, the movement coefficients of all movement axes are defined through the rotary radiuses. On the basis, each line of G code movement coefficients are synthesized through a weighted average method to obtain a movement proportionality coefficient, the originally planned feeding speed of each line of G codes is multiplied by the movement proportionality coefficient of the line, and the machining program is updated. Speed fluctuation caused by unmatched dimension can be greatly reduced, the unstable discharging state of movement in which the rotary axes are involved is avoided, the frequency of open circuits and short circuits is reduced, and the electrosparking efficiency is improved.

Description

technical field [0001] The invention relates to electric spark process control, belongs to the technical field of special processing, in particular to a design method for a multi-axis linkage electric spark feed speed controller. Background technique [0002] Modern CNC machining includes several typical links of CAD (Computer Aided Design), CAM (Computer Aided Manufacturing), post-processing, and CNC machining, such as figure 1 shown. CAD is used to design the workpiece, CAM simulates the processing process to generate processing trajectory information, and the post-processing process optimizes the processing code for the equipment or process to obtain better processing results. [0003] EDM is a process of removing material from a workpiece by a series of spark discharges between the workpiece and the electrode. EDM is widely used in molds, aerospace, medical equipment and other fields. Compared with traditional milling, EDM has many differences. For example, EDM is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H7/20
CPCB23H7/20
Inventor 奚学程陈昊刘宏达赵万生
Owner SHANGHAI JIAO TONG UNIV
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