Fixture for laser welding machine for large-diameter thin-walled parts

Abstract

A fixture for a laser welding machine for large-diameter thin-walled parts comprises a supporting positioning portion, a seam alignment mechanism and a clamping mechanism. The supporting positioning portion comprises a fixing rack and a fixture; two arc plates used for supporting the large-diameter thin-walled part are disposed on the left and right sides of each end of the fixture; the top of the fixture is provided with a mounting groove in the length-wise direction; a base plate is disposed at the bottom of the mounting groove; two iron pads are disposed on the base plate; the upper surface of each iron pad is a slant inclining inside to outside; the upper surface of each iron pad and the horizontal plane form an included angle of 3 degrees; a passage air duct is formed between the two iron pads; each of the same ends of the iron pads is provided with a positioning block and a positioning pin; a sucker stop at the same end with the positioning pin is disposed on one iron pad. The fixture is reasonable in design and simple in structure; the problem that the thin-walled parts with long length-to-diameter ratio are difficult to butt during laser welding is solved; the problems, such as edge locking, material loss and welding arc pits, are avoided during butt welding.

Description

technical field

[0001] The invention relates to a fixture, in particular to a fixture of a laser welding machine for large-diameter thin-walled parts. Background technique

[0002] Nuclear power is one of the important clean energy sources, and most developed countries have already used nuclear energy as the main source of electricity. The nuclear island of a nuclear power plant is mainly composed of four parts: nuclear reactor, nuclear main pump, steam generator and voltage regulator. According to the structure, nuclear main pumps are divided into shielded pumps and shaft sealed pumps. The stator and rotor of the shielded nuclear main pump are wrapped in a corrosion-resistant shielding sleeve, and its main function is to prevent the rotor copper bars and stator windings from contacting the reactor coolant. The shielding sleeve is divided into a stator shielding sleeve and a rotor shielding sleeve. The stator shielding sleeve is to protect the winding insulation of the st...

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