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Real-time zooming laser welding method

A laser welding and welding head technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve problems such as poor welding, inconsistent height, and false welding of products, and achieve fast response speed, fast real-time response, and improved consistency sexual effect

Pending Publication Date: 2021-01-15
CHANGZHOU INST OF TECH
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Problems solved by technology

Since only one point is measured, if the welding surface is uneven, it will also cause poor welding due to inconsistent heights
At the same time, since the measurement system and the welding system are independent of each other, it is not conducive to the rapid integration of the integrator, which increases the periodicity and uncontrollability of the project
Limited by the laser focal length, when the height of the product plane changes, it is easy to cause false welding of the product, resulting in poor welding
The shaking of the equipment table caused by the movement of the laser head also increases the defective rate of welding

Method used

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0021] A real-time zoom laser welding method of the present invention such as figure 1 shown, including:

[0022] 1. The design of the mechanical mechanism of the welding head. Welding head mechanism such as figure 2 As shown, it includes a servo motor 1 , a radar 3D sensor 2 , an interlocking device 3 , a focusing lens 4 , and a measuring surface 5 . Compared with the traditional welding head, the height-adjustable mechanism of the focusing lens is added. The mechanism adopts a high-precision linkage mechanism, and the servo motor drives the focusing lens to adjust up and down. At the same time, the limit and origin devices are added to ensure the controllable position of the system during operation.

[0023] 2. Radar sensor welding surface measurement system. An ultrasonic measuring device is added outside the laser welding head to measure the lower w...

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Abstract

The invention discloses a real-time zooming laser welding method. The method comprises the steps that a welding head mechanical mechanism is designed; a radar sensor welding surface measuring system is designed; and a radar sensor measurement system is designed, wherein acquired three-dimensional point cloud data are processed through an upper computer design manner, an image is processed, threshold segmentation is conducted on the image, external factor interference is removed during laser welding, only a data value of a plane is adopted, connectivity analysis is conducted on a region obtained after threshold processing, a region with smaller area is removed, and mean value processing and differential comparison are conducted on the finally obtained region, and an optimal height value isoutput. According to the laser welding method, the welding focal length is guaranteed, a welding surface is detected in real time, a focusing lens in a laser head is adjusted, the response speed is high, vibration of a machine table is reduced, the welding consistency is improved, and the rejection rate of products is reduced.

Description

technical field [0001] The invention belongs to the field of laser welding, and in particular relates to a laser welding method with real-time zooming. Background technique [0002] At present, when laser welding products, when the welding process is fixed, if the welding focal length changes, it will directly cause bad phenomena such as virtual welding. The traditional way to solve this problem is to use point laser ranging, measure the height before welding, and move the Z-axis height of the laser welding head to realize height deviation compensation. Since only one point is measured, if the welding surface is uneven, it will also cause poor welding due to inconsistent height. At the same time, since the measurement system and the welding system are independent of each other, it is not conducive to the rapid integration of the integrator, which increases the periodicity and uncontrollability of the project. Limited by the laser focal length, when the height of the produc...

Claims

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Application Information

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IPC IPC(8): B23K26/21B23K26/046
CPCB23K26/21B23K26/046
Inventor 史建平晏刘武
Owner CHANGZHOU INST OF TECH
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