A kind of laser welding fixture and laser welding method

Abstract

The invention discloses a laser welding fixture and method. The laser welding fixture comprises a supporting rod, a positioning plate, U-shaped rotation arms and pressure covers; the supporting rod isarranged in the vertical direction, and the top end of the supporting rod is provided with the positioning plate in the horizontal direction; the upper surface of the positioning plate is provided with a storage groove, and the two sides of the positioning plate are provided with the U-shaped rotation arms; the pressure covers are installed on the U-shaped rotation arms; and driving devices are installed on the lower portions of the U-shaped rotation arms and used for driving the U-shaped rotation arms to rotate and do vertical reciprocating motion. The laser welding method comprises the following steps that a laser welding head is started, the U-shaped rotation arms on the fixture are started to rotate at the same time, and thus, the U-shaped rotation arms of the fixture rotate while thewelding head does rotary welding so that welding of an annular welding zone can be achieved at a time through the welding head; and a pressure sensor on the fixture can measure the pressure value applied to the pressure covers. According to the laser welding device and method, the welding sealing performance is good, and the welding efficiency is high.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a laser welding fixture and a laser welding method. Background technique [0002] One-time uninterrupted, a closed figure (such as circle, rectangle, etc.) is welded by laser in the fixture. During the welding process, a certain force must always be applied to the weldment and the weldment. Digital display and adjustable, power adjustment methods include (adjusting the size of the air pressure or oil pressure value, or adjusting the displacement of the lead screw through the servo, etc.). Currently, laser welding is used to weld a closed figure, which is formed by two tailor welding. Because of the blocking of the fixture, first weld part of the annular area, then disassemble it again, and then clamp it with the fixture to weld the remaining annular area. The two tailor welding is easy Leading to weld defects, there is a hidden danger of poor sealing, and the effici...

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Problems solved by technology

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art that cannot be welded at one time and cause poor welding sealing.

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