A kind of three-way compound forming mold and a process manufacturing method of large-diameter three-way
A composite forming, large-diameter technology, applied in the field of three-way composite forming molds and large-diameter three-way manufacturing, can solve the problems of low forming rate, high processing cost, poor metal fluidity, etc., and achieve good uniform deformation and product quality. Improved pass rate and uniform wall thickness
Active Publication Date: 2017-01-04
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0010] The present invention provides a tee compound forming mold and a manufacturing method of a large-diameter tee, aiming to solve the problem of high-strength pipeline steel in the traditional process when the large-diameter thick-walled tee with Dn≥400㎜ is hot-pressed. Poor metal fluidity, uncoordinated deformation of the billet tube, uneven wall thickness increase of the tee main pipe and branch pipes, low forming rate, and high processing costs
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[0027] In order to enable those skilled in the technical field to which the application belongs to understand the application more clearly, the technical solutions of the application will be described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0028] Such as figure 1 , figure 2 , image 3 , Figure 4 with Figure 5 . The large diameter tee is carried out according to the following procedures:
[0029] Flattening: the austenitized cylindrical blank tube is flattened into a flat tube 1 . Its width W is 0.9D 0 ~1.1D 0 ,D 0 is the outer diameter of the tee pipe. Specifically, austenitization is a metal heat treatment process in which the cylindrical blank tube is heated above the critical point to form austenite.
[0030] Drum shape: On the billet tube drum mold, the flat tube 1 is pressed into a flat drum-shaped billet tube 2, and the minimum outer radius r of the tube end of the flat drum-shaped billet tube 2 is 0.45D...
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The invention discloses a tee composite forming die and a manufacturing method of a large-diameter tee, which solves the problem of the high-strength pipeline steel metal flow in the traditional process when the large-diameter thick-walled tee is hot-pressed and formed with Dn≥400㎜. Poor performance, uncoordinated blank tube deformation, uneven wall thickness increase of tee main pipe and branch pipe, low forming rate and high processing cost. The outstanding feature of the present invention is that based on the principles of metal thermal processing technology and metal material science, the combination of metal thermal processing process improvement and mold design can ensure uniform deformation of metal materials at high temperature and better forming effect. The large-diameter thick-walled tee processed by the method has relatively uniform wall thickness of the main pipe and branch pipes, significantly improved production efficiency and product qualification rate, and the thickness of the tee shoulder can meet the requirements.
Description
technical field [0001] The invention relates to the technical field of processing metal pipe fittings, in particular to a three-way composite forming die and a manufacturing method for a large-diameter three-way. Background technique [0002] At present, high-pressure, high-temperature, high-strength, large-diameter and thick-walled tees mainly include forged tees and hot-pressed tees. For occasions with high transportation requirements, welding tees or cast tees are generally not allowed. Therefore, for large-diameter and thick-walled tees, hot pressing is generally used for processing. [0003] The processing flow of the existing large-diameter thick-walled tees is mainly: [0004] 1. Heat the round blank tube to AC 3 After keeping warm for a period of time, take it out of the oven and flatten it. [0005] 2. Continue heating to AC after flattening 3 After the above heat preservation for a period of time, bulge on the press. [0006] 3. Repeat the bulging process for ...
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IPC IPC(8): B21D37/10B21D22/00B21D37/16
Inventor 范玉然魏秦文冯斌李玉卓姚登樽汪凤张希悉何东升王玮吴江桥王福宾王磊
Owner BC P INC CHINA NAT PETROLEUM CORP