Nozzle plate welding process of platinum alloy bushing plate

Abstract

The invention discloses a nozzle plate welding process of a platinum alloy bushing plate, which adopts optical fiber continuous laser welding, a laser beam moves along a circular gap between mounting and matching surfaces of a discharge spout and a bottom plate, and keeps swinging in the circumferential direction by taking a point on the circular gap as a center at the same time, so that the width of a formed welding seam is at least two times of the spot diameter of the laser beam. By means of the nozzle plate welding process of the platinum alloy bushing plate provided by the invention, the depth-to-width ratio of a refractory precious metal material welding seam can be increased, thermal deformation of the bottom plate is small, and the welding strength is high. In the welding process, by means of swinging of the laser beam in the circumferential direction, the width of the welding seam between the discharge spout and the bottom plate can reach several times of the light spot of the laser beam, the welding seam coverage rate is increased, the requirement of welding equipment for workpiece manufacturing precision is lowered, and cost is effectively reduced. Meanwhile, as the width of the welding seam is increased, the phenomena of unsoldering, pseudo soldering and the like can be effectively reduced or avoided.

Description

technical field [0001] The invention relates to a nozzle plate welding process of a platinum alloy bushing. Background technique [0002] At present, in the manufacturing process of platinum alloy bushings, the welding of the bottom plate and the leak nozzle mainly includes argon arc welding, pulse laser welding and continuous fiber laser welding. Among them, the welding seam of argon arc welding is wide, the welding seam depth is shallow, and the thermal deformation of the material is large. , the weld seam strength is average; the weld seam of pulsed laser welding is wider, the weld seam depth is shallow, the thermal deformation of the material is larger, and the weld seam strength is lower; the weld seam depth of continuous optical fiber laser welding is deeper, the material thermal deformation is small, and the weld seam It has higher strength and is more suitable for automatic control, but its welds are generally narrow. In the actual welding process, due to the thermal...

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Problems solved by technology

[0002] At present, in the manufacturing process of platinum alloy bushings, the welding of the bottom plate and the leak nozzle mainly includes argon arc welding, pulse laser welding and continuous fiber laser welding. Among them, the welding seam of argon arc welding is wide, the welding seam depth is shallow, and the thermal deformation of the material is large. , the weld seam strength is average; the weld seam of pulsed laser welding is wider, the weld seam depth is shallow, the thermal deformation of the material is larger, and the weld seam strength is lower; the weld seam depth of continuous optical fiber laser welding is deeper, the material thermal deformation is small, and the weld seam It has higher strength and is more suitable for automatic control, but its welds are generally narrow. In the actual welding process, due to the thermal deformation of the bottom plate, the shrinkage caused by the cooling of the weld pool and the interference of other external factors, with the welding Continuously, the deviation of welding position is getting bigger and bigger. After adopting high-precision control, although the welding quality can be improved to a certain extent, but the efficiency of mouth plate forming is greatly reduced, and the manufacturing cost is greatly increased.

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