Online dynamic vision laser precise processing method

Abstract

The invention discloses an online dynamic vision laser precise processing method. When workpieces are advanced on a production line at uniform speed, the position and time information of the workpieces is acquired through a CCD high-speed camera in real time; the needed time of the workpieces from an appointed detecting position of the CCD high-speed camera to a laser processing center and the relative offset are calculated; a gesture of a laser head is synchronously compensated and calibrated through a laser auxiliary moving mechanism; when the workpieces are advanced to the processing position, the laser is triggered to irradiate the surfaces of the workpieces to finish high-precision surface laser processing of the workpieces moving at uniform speed; the positioning error is lower than 0.1 mm; and the three-dimensional positions of the workpieces are not needed to precisely adjust. The online dynamic vision laser precise processing method can guarantee the processing precision without needing any other sensors or precise tools, prominently improves the production line processing efficiency, reduces the hardware cost, and can effectively guarantee the realization effect.

Description

technical field [0001] The invention relates to an on-line dynamic visual laser precision machining method, in particular to a process of uninterrupted uniform-speed feeding of workpieces, which can be quickly and gradually completed by lasers without precise adjustment of the three-dimensional position of the workpieces. The workpiece precision processing method belongs to the technical field of laser processing. Background technique [0002] Laser marking, cutting or welding processing methods have the characteristics of high processing precision and good processing quality. The existing laser processing methods are mainly used in static occasions or intermittent dynamic rough processing occasions. The processing process is: firstly use precision tooling fixtures to position the workpiece In the static position, and then perform positioning laser processing at this position, in order to ensure the accuracy of laser processing, the positioning error of the workpiece is ofte...

AI Technical Summary

Problems solved by technology

The disadvantage of this static or intermittent dynamic processing method is the low efficiency

[0003] The positioning method disclosed in the invention patent "A Visual Positioning Method, Device and System for Assembly Line Operation" (CN103473442A) is to use the CCD visual positioner to locate the position of the workpiece on the first station, and the processor according to the position of the workpiece on the first station Information, control the calibration of the manipulator on the subsequent station or the adjustment of the position of the workpiece, and then use the manipulator to process the workpiece. The assembly line and processing scheme with visual positioning designed by this method are limited by the sensitivity and accuracy of the conveyor belt and manipulator, and the cooperation of sensors is required. , has high requirements on the accuracy and sensitivity of the sensor; on the other hand, this method is a passive processing method that allows the workpiece to be in the set initial position before processing by pre-adjusting the position of the workpiece and the manipulator, because the adjustment process takes time Long, it will also affect the processing efficiency

Therefore, the technical solution disclosed in the invention patent "A Visual Positioning Method, Device and System for Assembly Line Operation" (CN103473442A) also cannot meet the requirements of high-precision laser precision machining of assembly-line moving workpieces

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