Thick-wall large-diameter multi-wave expansion joint manufacturing method
A production method and technology of expansion joints, which are applied in the direction of manufacturing tools, other household appliances, household appliances, etc., can solve the problems of insufficient hydraulic equipment capacity and size deviation, and achieve the effect of reducing pressure and ensuring material quality.
Inactive Publication Date: 2013-09-25
南京三邦新材料科技有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem of the size deviation of the thick-walled large-diameter multi-wave expansion joint in the process of pressing and after forming and the insufficient capacity of hydraulic equipment. The present invention provides a production of thick-walled large-diameter multi-wave expansion joint craft
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[0013] The specific embodiment of the present invention is described below in conjunction with accompanying drawing:
[0014] In order to ensure the quality of the expansion joint after forming, 100% UT testing is carried out on the thick-walled stainless steel raw materials, which conform to the JB / T4730.3-2005 standard Class I qualification, and 100% PT testing is carried out on the inner and outer surfaces, which conforms to the JB / T4730.5-2005 standard Class I is qualified, and the chemical composition and mechanical properties of the raw materials are re-inspected in accordance with the corresponding material standards. After the solution heat treatment test, the performance change of the raw material before and after solid solution is tested, and the final forming pressure of the expansion joint is calculated according to the empirical formula of the pressure and the performance of the raw material during the forming process of the expansion joint.
[0015] The forming p...
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The invention provides a thick-wall large-diameter multi-wave expansion joint manufacturing method. A forming mold comprising a middle mold, a combination seal structure and a hydraulic equipment pressing plate are utilized, a middle core shaft is further arranged inside the forming mold, and the inner pressure of an expansion joint in a forming process is guaranteed by means of a sliding seal between the middle core shaft and a pipe blank before forming. In the forming process of the expansion joint, the forming mold and a tool are utilized for guaranteeing that dimensional tolerance and geometric tolerance of the appearance of the formed expansion joint are within a standard range. The sliding seal between the middle core shaft in the forming mold of the expansion joint and the pipe blank comprises a Y-shaped seal ring, an O-shaped seal ring and a filler seal and is a high-pressure sliding seal, pressure in the forming process of the expansion joint is lowered, and the expansion joint is full in wave shape, achieves rounding transition of wave crests and wave troughs, and has no corner angle. Coaxiality, perpendicularity, ovality and other dimensional tolerance of the formed expansion joint meet standard requirements, and material quality of the formed expansion joint is guaranteed.
Description
technical field [0001] The invention relates to the production of an expansion joint, in particular to a production process of a thick-walled large-diameter multi-wave expansion joint. Background technique [0002] As a pipeline compensation component, bellows expansion joints are widely used in fields such as electric power, petrochemical, heating, steel, and urban construction. Its function is to play a compensating role in the connection between power or heat pipe network, equipment and pipeline, equipment and equipment. The bellows expansion joint compensates the position movement of the pipeline system or equipment due to temperature difference (or mechanical movement) by its axial expansion or angle change, and eliminates the vibration of the equipment when it is started, stopped or under normal operating conditions. In recent years, with the continuous development of my country's equipment industry, the application of large thick-walled heat exchanger equipment and p...
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IPC IPC(8): B21D15/10B21D37/10B21D51/00
Inventor 高利霞赵孟欢陶红蕾
Owner 南京三邦新材料科技有限公司