Multi-level anti-collision system for double-swing-shaft laser machining head

Abstract

To conduct all-direction protection on a double-swing-shaft laser machining head, the invention provides a multi-level anti-collision system for the double-swing-shaft laser machining head. A first anti-collision unit, a second anti-collision unit and a comparison unit are included. The first anti-collision unit comprises a current detection device for detecting the current of a motor in the double-swing-shaft laser machining head. The comparison unit is used for comparing the motor current variations detected by the current detection device with the current changing threshold value, and whenany motor current variation is larger than or equal to the current changing threshold value, the comparison unit sends collision signals to a numerical control system of a laser machining machine tool. The second anti-collision unit comprises a return device and a pressure detection unit. When output signals of any pressure sensor in the pressure detection unit are larger than or equal to the pressure changing threshold value, the comparison unit sends collision signals to the numerical control system. After the numerical control system receives the collision signals sent by the first anti-collision unit or the second anti-collision unit, laser device stopping and machine tool motion shaft enabling operation removal are conducted.

Description

Technical field [0001] The invention belongs to the technical field of laser processing equipment, and relates to a multi-stage collision avoidance system of a double pendulum axis laser processing head. Background technique [0002] Laser processing is to introduce the laser into the laser processing head through the light guide system, and realize the relative movement between the laser processing head and the workpiece through the movement mechanism, so that the laser beam is focused on the surface of the workpiece for processing. [0003] Five-axis linkage laser processing equipment is the main production equipment that realizes the surface manufacturing of complex curved components (punching, cutting, pattern manufacturing, etc.). Among them, the dual pendulum-axis laser processing head is an important part of the five-axis linkage laser processing equipment, which can realize laser The two-dimensional angle adjustment of the beam space can realize complex curved surface proce...

AI Technical Summary

Problems solved by technology

This kind of anti-collision method can effectively reduce the probability of collision between the general laser processing head (without rotating shaft) and the workpiece, but for the double-oscillating-axis laser processing head with two rotating shafts, the anti-collision effect is not good and cannot be realized. All-round protection; in addition, most of the existing anti-collision methods can only achieve anti-collision in one direction. When laser processing equipment processes workpieces with complex shapes, anti-collision in one direction cannot be effectively protected, and the laser processing head is likely to collide with the workpiece. put one's oar in

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