Manufacturing method of falcula
A driving mechanism and control rod technology, which is applied in the field of preparation of grippers of nuclear power control rod drive mechanisms, can solve problems such as holes and surfacing layers that are prone to cracks, and the dimensional accuracy of the hook claws can not meet design requirements, so as to ensure dimensional accuracy. , the effect of reducing difficulty
Active Publication Date: 2013-05-01
上海第一机床厂有限公司
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Problems solved by technology
[0005] (1) The surfacing layer of the hook pin hole is prone to defects such as cracks and holes;
[0006] (2) The dimensional accuracy of the finished hook claw cannot meet the design requirements
Method used
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Embodiment Construction
[0062]The following describes in detail the specific implementation of a method for preparing a claw used in a nuclear power control rod drive mechanism provided by the present invention in conjunction with the accompanying drawings.
[0063] See attached figure 1 , attached figure 2 , attached image 3 , attached Figure 4 , attached Figure 5 , attached Image 6 , a preparation method of claw 1, the steps are as follows:
[0064] The first step is to blank the material that has passed the re-inspection according to the required size to make a blank of the workpiece, and the material is austenitic stainless steel. Since the claw teeth 2 are arc-shaped, when the four claws 1 are integrated, the claw teeth 2 just form a round hole, and the surfacing operation in the round hole is easier than welding a single claw tooth 2. The welding process is simpler. Moreover, the overall surfacing welding of four workpieces is more convenient than the machining of a single workpiece...
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Abstract
The invention discloses a falcula for nuclear power control rod drive mechanism, and a manufacturing method thereof, comprising the following steps of: blanking, processing a tooth part of the falcula, overlaying the tooth part of the falcula, processing and overlaying a first pin hole and a second pin hole, processing the overlaid tooth part of the falcula, processing a back trough of the falcula, processing the overlapped first pin hole and the overlapped second pin hole, grinding and machining a side face of the falcula, and processing a chamfer of the falcula. In the method of the invention, firstly the tooth part of the falcula is machined, overlapping is carried out on the tooth part of the falcula, the pin holes of the falcula are machined after the tooth part of the falcula is overlapped, and then the pin holes are subjected to overlapping; more deformation of stainless steel base metal caused by higher thermal input when the tooth part of the falcula is overlapped is avoided,; therefore, deformation influence in a falcula overlapping process is effectively controlled.
Description
technical field [0001] The invention relates to a preparation method for a claw used in a nuclear power control rod driving mechanism, in particular to a preparation method for a claw of a nuclear power control rod driving mechanism. Background technique [0002] The control rod drive mechanism is one of the key equipment in the nuclear island of the nuclear power plant. This mechanism can drive the control rod assembly to move up and down in the core according to the command, and play a role in power regulation and reactor shutdown in emergency situations. The operating temperature of the control rod drive mechanism is 293 o C, the working pressure is 15.5MPa, and the service life is 40 years. The hook claw is a core action part of the control rod drive mechanism, and the reliability of its action is the key to ensure the stable function of the entire control rod drive mechanism. At present, the claws of the magnetic lifting type control rod drive mechanism used in nuclea...
Claims
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IPC IPC(8): B23P15/00
Inventor 王方刘德明顾善生潘令平任正秋
Owner 上海第一机床厂有限公司