Claw provided with novel abrasion-resisting layer structure and manufacturing method thereof

Abstract

The invention discloses a nuclear power station control rod drive mechanism claw provided with a novel abrasion-resisting layer structure and a manufacturing method thereof. According to the structure of the claw, the appearance of an abrasion-resisting layer of a pin hole is square, and the combining face of claw teeth and a base body is a plane. The claw adopts a laser 3D printing technology. The laser 3D printing technology comprises the following manufacturing steps that S1, a three-dimensional mathematical model of a workblank is established; S2, a laser deposition manufacturing scheme is formulated, and slicing and laser scanning path planning are conducted on the mathematical model; S3, manufacturing parameters are set and a process control program is compiled; S4, preparation work before manufacturing is completed; S5, laser deposition manufacturing is performed according to the set program; S6, the claw workblank is cut and separated from a base plate and then heat treatment is performed; S7, the claw workblank obtained after heat treatment is machined to obtain a finished claw product. The manufactured claw has the mechanical property better than that of an oxyacetylene overlaying claw, the production process is completely and automatically controlled and is not influenced by operators, and the claw is suitable for batch production and can completely replace the oxyacetylene overlaying claw.

Description

technical field [0001] The invention belongs to the field of laser additive manufacturing, and relates to a novel structure and a manufacturing method for a claw of a control rod driving mechanism of a nuclear power plant. Background technique [0002] The control rod drive mechanism is the key equipment of the nuclear power plant reactor, and it is also the only moving equipment on the reactor body. The claw assembly is one of the most core and critical parts in the control rod drive mechanism. Functional operations such as reactor start-up, power regulation, power maintenance, normal shutdown and accident shutdown, etc., rely on two groups of claws to swing in and out according to the timing movement to complete the lifting and lowering actions of the drive rod to drive the core control rods. to realise. [0003] The development of nuclear power technology puts forward higher requirements on the safety, reliability and economy of reactor systems and equipment. As a wear...

AI Technical Summary

Problems solved by technology

However, due to the high difficulty of manual surfacing welding of oxyacetylene in small holes, poor process stability, low production efficiency, and low product qualification rate, the products of relevant domestic units have no practical engineering application value

Images