Cold Forming Technology of Thick-wall Bimetallic Tee Pipe

Abstract

A cold-press forming process of a thick-wall bimetallic tee includes the following steps of step 1, the equipment arrangement is performed; step 2, straight pipe billets are placed in an inner cylinder and a mud-shaped pressure-bearing medium is injected into the straight pipe billets; step 3, a press machine is controlled to enable a pressure head of the press machine to drive a cylinder to move downward, the cylinder slowly enters the straight pipe billets to press the pressure-bearing medium, the straight pipe billets gradually protrude towards the inside of a circular hole, and the straight pipe billets are pressed to form the tee; step 4, the pressure head of the press machine moves upward, an outer cylinder is pulled upward through a rope to enable the outer cylinder to be separated from the inner cylinder, and two half cylinders can be opened to take out of the tee which is formed through pressing; step 5, a plugging end of a branch pipe portion of the tee is cut off along the radial direction to enable the branch pipe to be through inside and outside. The cold-press forming process of the thick-wall bimetallic tee is specially applicable to the forming operation of the thick-wall bimetallic tee and has the advantages of being simple in process, easy to operate, high in automation degree and good in forming quality and effect.

Description

technical field [0001] The invention belongs to the technical field of pipe fitting production and manufacturing, and in particular relates to a cold-press forming process of a thick-walled bimetal tee pipe. Background technique [0002] A pipe joint with three openings is called a tee ( pipetee (T), three-waytube, three-waypipe ). Tee pipes are widely used in pipe networks for conveying liquids and gases. Due to the different conveying media, the material of the tee pipe is divided into: cast iron, cast steel, cast copper, cast aluminum, plastic, glass, etc. [0003] The tee has one inlet and two outlets; or two inlets and one outlet. The overall shape of the three-way pipe is T-shaped and Y-shaped, with equal-diameter nozzles and different-diameter nozzles, which are used for the confluence of three identical or different pipelines. Its main function is to change the direction of the fluid. It can be used in water pipelines, oil pipelines and various liquid chemical m...

AI Technical Summary

Problems solved by technology

However, for the thick-walled bimetallic composite tee pipe, if hot pressing or the above-mentioned hydraulic method is used, the stainless steel layer inside is easy to wrinkle under the condition of heating, the geometric size of the inner diameter cannot be guaranteed, and it is easy to damage the bimetallic stainless steel composition. , leading to the inability to weld, and the formed tee pipe has uneven thickness, rough appearance, and unsatisfactory geometric dimensions. When welding pipes and tee pipes, such and other problems often occur, resulting in unreliable welds and affecting oil transportation. Normal operation of gas pipeline

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