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Abstract：
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In order to solve the poor reliability problem of loose control for inner hexagon screw in nuclear pump and improve the safety and reliability in a long-term operation, a special locking gasket for inner hexagon screw was presented, and the structure of the locking gasket was introduced. Then, the stamping process scheme was confirmed, the bending process was designed and calculated, and the bending die of the locking gasket was designed. Furthermore, the bending simulation for the locking gasket was carried out by CAE. And the obtained material forming limit diagram shows that the forming process is mainly a ‘retracting’ deformation mode in which the tension-compression was the main strain. Therefore, the bending deformation of the locking gasket is safety, and the locking gasket can be bended by one step. In addition, the fastening and disassembling tools of the locking gasket were designed, and the feasibility of the locking gasket was verified by the experiment so as to improve the reliability of loose control by screws. Thus, the locking gasket can be widely applied to lock and tighten the high-reliability inner hexagon screw for military or civil.
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Funds：
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国家科技支撑计划项目（2015BAA08B03）
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AuthorIntro：
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孙琪(1988-)，男，学士，工程师，E-mail：sunqi8842@163.com；通讯作者：王哲英（1973-），女，博士，讲师，E-mail：zheying_wang@sina.com
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Reference：
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