A kind of precision machining method of nuclear power main body busbar

Abstract

The invention relates to a precision machining method for a nuclear power main body bus. The precision machining method comprises the following steps of primary welding bus body machining, alternating-current side bus body machining and alternating-current side terminal strip machining in sequence. The precision machining method further comprises the steps of whole assembly and whole suppressing and detecting. The process of primary welding bus body machining comprises the following steps that end face and stepped bore blocking is conducted, and an inner cavity and the surface of a primary welding bus body are cleaned through ultrasonic washing, so that it is ensured that the cavity in the primary welding bus body is clean. The process of primary welding bus body machining further comprises the following steps that the outer surface of the primary welding bus body is subjected to finish machining and high-temperature-resistance hair felt protection finish machining, so that machining accuracy and the combined contact face smooth finish of the primary welding bus body are ensured. According to the whole assembly step, the primary welding bus body is vertically welded to the alternating-current side bus body, and opposite angles are simultaneously welded, so that welding stress deformation is counteracted with each other, and welding stress is prevented from generating deformation.

Description

technical field [0001] The invention relates to a processing method for a busbar, in particular to a precision processing method for a main body busbar of a nuclear power plant. Background technique [0002] The connection parts of the components of the main busbar used in nuclear power projects are all in hard contact, so the matching accuracy of the contact surface is strictly required to ensure that the electrical components and the main busbar can be closely fitted to meet the working requirements of the busbar; because the main busbar The operating temperature of the electrical components on the row cannot exceed 25°C, so the inner cavity of the busbar profile must dissipate heat quickly, and the water flow pressure in the inner cavity must reach 1 MPa, so the airtightness of the sealing weld at the end of the profile is strictly required, and It is necessary to control the cleanliness of the inner cavity, especially without aluminum chips; when the product is in operat...

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Problems solved by technology

[0002] The connection parts of the components of the main busbar used in nuclear power projects are all in hard contact, so the matching accuracy of the contact surface is strictly required to ensure that the electrical components and the main busbar can be closely fitted to meet the working requirements of the busbar; because the main busbar The operating temperature of the electrical components on the row cannot exceed 25°C, so the inner cavity of the busbar profile must dissipate heat quickly, and the water flow pressure in the inner cavity must reach 1 MPa, so the airtightness of the sealing weld at the end of the profile is strictly required, and It is necessary to control the cleanliness of the inner cavity, especially without aluminum chips; when the product is in operation, the outside of the busbar needs to carry a current of 30 kA or more, which requires a high load-bearing capacity of the welds on the outside of the busbar, and a large number of welding processes are required, which is easy to lead to welding deformation

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