Automatic focusing method of laser cleaning machine

Abstract

The invention discloses an automatic focusing method of a laser cleaning machine, and relates to the technical field of laser cleaning. According to the technical scheme of the automatic focusing method of the laser cleaning machine, the automatic focusing method of the laser cleaning machine is characterized by comprising the following steps that S1, a focus measuring seat is aligned with a lasercleaning head; S2, a vertical displacement mechanism is controlled through a controller to enable the vertical displacement mechanism to drive the laser cleaning head to move; S3, the strength of received signals is analyzed by the controller, the strongest signal value is selected, the corresponding position of the strongest signal value is determined, and the focusing point of the laser cleaning head on the focus measuring seat is determined; S4, the to-be-cleaned surface of a to-be-cleaned workpiece is aligned with the focus measuring seat on the same horizontal plane; and S5, the focus measuring seat is horizontally moved out , and the to-be-cleaned workpiece is driven to move to the position of the focus measuring seat, and then the automatic focusing operation between the to-be-cleaned workpiece and the laser cleaning head can be completed. According to the automatic focusing method of the laser cleaning machine, focusing can be carried out under the condition of not damaging the to-be-cleaned workpiece, the focusing is automatically carried out, the focusing is more accurate, and the effect of improving the focusing convenience and the focusing precision is achieved.

Description

technical field [0001] The invention relates to the technical field of laser cleaning, more specifically, it relates to an automatic focusing method for a laser cleaning machine. Background technique [0002] Laser cleaning is a non-contact, safe and environmentally friendly cleaning method, which has the characteristics of non-abrasive, non-contact, no thermal effect and suitable for various materials. The workpiece to be cleaned is sometimes uneven and uneven, so it is necessary to adjust the focus of the laser cleaning head. [0003] For example, the authorized announcement number is CN207126928U, and the Chinese patent with the announcement date of March 23, 2018 discloses an autofocus laser cleaning machine, including a workbench, a beam, a laser cleaning mechanism, a distance measuring mechanism, and a positioning mechanism. The beam is along the Y axis. It is movable on the workbench, and the laser cleaning machine mechanism is slidingly connected to the beam along t...

AI Technical Summary

Problems solved by technology

However, the laser cleaning head directly acts on the workpiece during the focusing process, and the laser continuously acts on the workpiece during the focusing process, which may cause damage to the workpiece, and the use of distance measurement to determine the focus is easily interfered by the medium, resulting in a certain error, which affects the measurement of distance data. The accuracy of the focus, which in turn affects the accuracy of the focus

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