Method for determining position of laser welding focus

A focus position, laser welding technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of inaccurate reflection of laser energy density, inaccurate focus position selection, cumbersome focusing process, etc., to save image acquisition and processing time, avoiding the error of subjective judgment by the naked eye, and the effect of high image clarity
CN114654077APending Publication Date: 2022-06-24苏州贝亚敏光电科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
苏州贝亚敏光电科技有限公司
Publication Date
2022-06-24

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Abstract

The invention discloses a method for determining the position of a laser welding focus. The method comprises the following steps that S1, (2N + 1) test plates are prepared; s2, setting the power of a laser head as P1, setting the distance between the laser head and the ith test board as hi, starting the laser head, and controlling the laser head to weld a weld mark on the ith test board; repeating the step S2 for multiple times until i = 2N + 1; s3, the welding marks of the first back face, the second back face and the like are sequentially compared, and a focus precise interval [H1, HM] is obtained; s4, preparing M test plates; s5, the power of the laser head is set to be P2 and P2lt; p1, the distance between the laser head and the kth test plate is Hk, the laser head is started, and the laser head is controlled to weld a weld mark on the kth test plate; repeating the step S5 for multiple times until k is equal to M; and S6, comparing the welding marks on the kth test front side and the kth test back side to obtain the distance H0 between the laser head and the focus. According to the method for determining the position of the laser welding focus, the accuracy of the position of the focus is effectively ensured, and the rapidness of finding the focus is greatly ensured.
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Description

technical field

[0001] The invention relates to the technical field of laser processing, in particular to a method for determining the focus position of laser welding. Background technique

[0002] In recent years, fiber laser welding has become the mainstream technology in the welding industry, and it is also widely used in precision fields such as the microelectronics industry and biomedicine. During laser welding, the laser head is driven by a moving mechanism such as a robotic arm, focuses the laser on the position of the workpiece to be welded, and moves at a preset speed and path to realize welding. The defocus amount of the laser is one of the main factors affecting the quality and accuracy of laser welding, so it is necessary to accurately find the focal position of the laser head.

[0003] Generally, a red light indicator is provided on the laser head, which can indicate the approximate position of the focus. In order to accurately determine the focus position (wit...

Claims

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