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Method for machining omega weld joint groove in lower portion of CRDM of nuclear power plant and cutter

A CRDM, weld groove technology, applied in manufacturing tools, metal processing equipment, tools for lathes, etc., can solve the problems of affecting welding quality, low reliability, and difficult to guarantee dimensional accuracy.

Active Publication Date: 2015-11-25
中广核工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention aims at the technical problems existing in the prior art that it is difficult to ensure the dimensional accuracy and low reliability of the groove processing of the Ω weld of the lower part of the CRDM of the nuclear power plant, thereby affecting the welding quality, and prolonging the construction period and increasing the exposed time of the construction personnel. A method and cutting tool for processing the groove of the Ω weld in the lower part of the CRDM of a nuclear power plant

Method used

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  • Method for machining omega weld joint groove in lower portion of CRDM of nuclear power plant and cutter
  • Method for machining omega weld joint groove in lower portion of CRDM of nuclear power plant and cutter
  • Method for machining omega weld joint groove in lower portion of CRDM of nuclear power plant and cutter

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Embodiment 1

[0046] Please refer to Figure 4 and Figure 5 , the embodiment of the present invention provides a Ω weld bevel processing tool for the lower part of the CRDM of a nuclear power plant, the Ω weld B is a weld formed between the CRDM and the lip A of the reactor pressure vessel top cover through Ω seal welding, and the Ω weld B is formed by Ω seal welding. Knives include:

[0047] The cutting part 1 includes: a first machining knife surface 11 for cutting the weld residue on the inner side of the lip A of the socket, wherein the first machining knife surface 11 is arc-shaped; The second processing knife surface 12 for cutting the weld residue on the upper part of the lip A of the adapter seat; the third machining cutter surface 13 for cutting the weld residue on the outer side of the lip A of the adapter seat;

[0048] The clamping part 2 fixedly connected to the cutting part 1 is used to be fixedly connected to the rotary head of the tool driving device, and driven by the ro...

Embodiment 2

[0053] Based on the same invention concept, please refer to Figure 7 , the embodiment of the present invention also provides a method for processing the Ω weld bevel at the lower part of the CRDM of a nuclear power plant, which is applied to the tool drive equipment, and the Ω weld is CRDM and the reactor pressure vessel top cover connecting pipe seat lip A through Ω seal welding The formed weld seam, the tool driving device is used to drive the Ω weld bevel processing tool at the lower part of the CRDM of the nuclear power plant to cut the weld seam residue on the lip A of the socket. Processing cutter face 12 and the 3rd processing cutter face 13; Described groove processing method comprises the following steps:

[0054] S1. After the tool is fixedly clamped on the rotating machine head of the tool driving device, detect and adjust the concentricity between the tool driving device and the socket, so that the tool driving device and the socket The concentricity of the seat ...

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Abstract

The invention discloses a method for machining an omega weld joint groove in the lower portion of a CRDM of a nuclear power plant and a cutter. The method and the cutter are used for solving the technical problems that the size of the machined omega weld joint groove in the lower portion of the CRDM of the nuclear power plant in the prior art is difficult to guarantee, reliability is low, welding quality is affected, and a construction period is prolonged. The cutter comprises a first machining blade, a second machining blade and a third machining blade. The method for machining the groove includes the steps that firstly, adjustment is performed, so that the concentricity of a cutter drive device is identical to that of a pipe connection seat and the initial position of the cutter is set; secondly, the cutter is driven to rotate around the axis of the pipe connection seat and driven to move downwards simultaneously, so that weld joint residues on the inner side, the upper portion and the outer side of the lip edge of the pipe connection seat are cut off through the first machining blade, the second machining blade and the third machining blade respectively; and thirdly, after the cutter reaches the preset position, the cutter is controlled to stop moving downwards, and the cutter moves upwards to be away from the lip edge of the pipe connection seat. By the adoption of the method and the cutter, the machining accuracy of the size of the lip edge of the pipe connection seat of a top cover of a pressure container is improved, the welding quality of a weld joint at the lower portion of the CRDM is guaranteed, and reliability is high.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant welding, in particular to a method for processing the bevel of an Ω weld at the lower part of a CRDM in a nuclear power plant and a cutting tool. Background technique [0002] The control rod drive mechanism (CRDM, ControlRodDriveMachine) used by the nuclear power plant to position the control rod assembly is installed on the nozzle seat of the top cover of the reactor pressure vessel, which is a completely leak-proof magnetic lock. The three electromagnetic coils are arranged in sequence, and under the control of the electrical signal sent by the reactor control system, the nuclear reaction rate is controlled by driving the control rod bundle to withdraw, maintain or insert into the reactor; among them, pulling out the control rods will increase the nuclear reaction, and inserting the control rods will weaken the nuclear reaction . [0003] The CRDM pressure hull has three welds, upp...

Claims

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Application Information

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IPC IPC(8): B23D79/00B23B27/00
Inventor 谢静刘以亮王东赵文灿彭杰邢如军樊树斌孙广裴正巧陈亮
Owner 中广核工程有限公司
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