A method for optical axis calibration of laser cutting equipment

Abstract

The invention discloses laser cutting equipment. The laser cutting equipment comprises a linear sliding table, a laser cutting head and a slewing bearing, wherein the laser cutting head is installed on the linear sliding table; the linear sliding table is installed on the slewing bearing; the mechanical axis of the laser cutting head is coaxial with the center line of the slewing bearing. The invention further discloses an optical axis calibration method of the laser cutting equipment. The method comprises the steps that the slewing bearing drives the linear sliding table and the laser cutting head to rotate; laser beams emitted by the laser cutting head circle on a calibration board along with rotation of the slewing bearing; the laser cutting head is adjusted many times to enable light spots on the calibration board to be converged at one point; at the moment, the optical axis of the laser cutting equipment is coaxial with the center line of the slewing bearing, and optical axis calibration of the laser cutting equipment is achieved. The unmeasurable laser axis is converted into a measurable mechanical axis; the structure is simple; the cost is low, determination of the optical axis position is used for numerical control machining, and the machining precision is greatly improved.

Description

technical field [0001] The invention relates to the field of laser cutting, in particular to a method for calibrating the optical axis of laser cutting equipment. Background technique [0002] In the manufacturing industry, molds are widely used. Different shapes of workpieces require different molds. Especially in the automotive industry, the boundaries, square holes, and round holes of automotive sheet metal molds require multiple stretching and shaping. Process a mold that meets the requirements, and in the process of processing, slight defects will cause the mold to fail to meet the requirements. Generally, seven or eight sets of molds can be made to make a set that meets the requirements. The production cycle of the mold is long and the cost is high. Especially The production of three-dimensional parts cannot meet the needs of the diversified development of the market. Using laser cutting can effectively solve the above problems. At present, some large-scale automobil...

AI Technical Summary

Problems solved by technology

However, when the laser cutting head is installed at the end of the industrial robot, because the laser optical axis is relative to the mechanical axis, it cannot be measured by mechanical measuring tools such as calibration. The optical axis of the cutting laser emitted is not necessarily coaxial, which makes it difficult to calibrate the position of the optical axis. If the optical axis is not calibrated, it means that the laser axis controlled by off-line programming is not clear, and the off-line programming processing The actual effect will be bad, and the machining accuracy will be low

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