Laser processing head and processing method for automatically controlling processing focal length

Abstract

The invention provides a laser processing head capable of automatically controlling processing focus length. The laser processing head comprises a Z-axis lifting skateboard, a laser processing head base plate and a rotation ranging mechanism. The Z-axis lifting skateboard is mounted on a laser processing machine and is driven by the same to move. A light guiding barrel and a focusing lens are arranged on the laser processing head base plate. The rotation ranging mechanism comprises a rotating disk, a driven gear, a driving gear, a servo motor and a wireless laser displacement sensor. The wireless laser displacement sensor is fixedly mounted on the bottom surface of the rotating disk with the mounting location enabling offset to be generated between measurement points of the wireless laser displacement sensor and processing focuses. The laser processing head can be intelligently applied to multi-assortment, multiple-batch and automated production occasions without shutdown adjustment and manual intervention. In addition, the invention further provides a laser processing method of the automatically controlling processing focus length.

Description

technical field [0001] The invention belongs to the technical field of laser processing, and in particular relates to a laser processing head and a processing method for automatically controlling the processing focal length. Background technique [0002] Laser processing head is the general term for all kinds of processing heads in laser processing methods (welding, cutting, cladding, etc.). After focusing, it acts on the surface of the processed workpiece to realize processing. Since the laser beam has the strongest light intensity at its focal length, it is often necessary to adjust the processing focal length during laser processing, that is, to make the laser beam focus on the surface of the workpiece to improve processing efficiency. [0003] The basic principle of the current processing focal length adjustment method is to obtain the three-dimensional undulations of the workpiece surface and the exact height coordinates of each place through measurement means in advan...

AI Technical Summary

Problems solved by technology

However, the processing focus adjustment methods of these off-line programming methods generally have the following problems: the degree of automation is low, and when the height of the workpiece changes (such as workpiece clamping errors, special-shaped workpieces, replacement workpieces, etc.), the machine must be stopped first and the height of the workpiece must be re-measured. , and then adjust the distance between the processing head and the workpiece (that is, the processing focal length); these adjustment methods are time-consuming and laborious, and cannot adapt to multi-variety, multi-batch, and automated production occasions

This is also the reason why laser processing equipment in the application field of laser processing technology is almost a single set, and it is rare to see laser processing technology being applied in multi-variety, multi-batch, flexible and automated production lines.

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