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Preparation method of metal pipe fittings not prone to deform

A metal pipe fitting and hard-to-deform technology, which is applied in the field of the preparation of hard-to-deform metal pipe fittings, and can solve the problems of complex structure of components, low production efficiency, and easy oxidation of welds.

Active Publication Date: 2020-04-17
WESTERN METAL MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, metal pipes with variable diameters that are difficult to deform and blind hole pipes are prepared as a whole by forging or extrusion, spinning, and then machining. Disadvantages such as low utilization rate, low production efficiency and high cost
[0003] Conventional welding methods, such as argon arc welding and electron beam welding, are all fusion welding, that is, the weld seam is in a molten state during welding. Therefore, the structure of the weld seam is thick, the weld seam is easy to oxidize, shrinkage cavities, and inclusions are easy to form. Defects, and the conventional welding method is also limited by the material and thickness of the weldment, the welding operation is cumbersome and the efficiency is not high

Method used

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  • Preparation method of metal pipe fittings not prone to deform
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preparation example Construction

[0028] The invention provides a method for preparing a difficult-to-deform metal pipe fitting, the difficult-to-deform metal pipe fitting includes a hard-to-deform metal reducing pipe and a blind hole pipe, comprising the following steps:

[0029] According to the structural parameters of the difficult-to-deform metal pipe fittings, the integral part is split into not less than two split parts, and then the split parts are prepared according to the structural characteristics of the split parts;

[0030] After performing friction welding on each split part, the burr at the weld seam is removed to obtain the hard-to-deform metal pipe fitting.

[0031] According to the structural parameters of the difficult-to-deform metal pipe fittings, the present invention divides the integral part into no less than two split parts, and then prepares the split parts according to the structural characteristics of the split parts. In the present invention, the material of the difficult-to-deform...

Embodiment 1

[0042] Ti6246 titanium alloy tube and Ti6246 titanium alloy rod were friction welded to prepare blind hole tube.

[0043] Step 1, the structural diagram of the Ti6246 titanium alloy blind hole tube, such as figure 1 As shown, the schematic diagram of the structure disassembly of Ti6246 blind hole tube is as follows figure 2 shown. Split the structure into two splits, split 1 is a rod of Φ200mm×80mm, and split 2 is a pipe of Φ160mm×16mm. The split body 1 is prepared by forging, the split body 2 is prepared by extrusion, the split body 1 bar and the split body 2 pipe required for preparing the blind hole pipe are cut out, and a welding shortening margin is reserved.

[0044]Step 2. One of the two split parts to be welded is clamped on the rotating fixture, and the other is clamped on the moving fixture, the process parameters of friction welding are set, and the friction welding equipment is started. The rotating workpiece starts to rotate at a high speed of 900rpm under the...

Embodiment 2

[0050] Fabrication of pure titanium reducer by friction welding.

[0051] Step 1, the structural diagram and disassembly diagram of the pure titanium variable diameter tube, such as Figure 6 As shown, the structure is split into three splits. Split 1 is a pipe of Φ200mm×10mm×200mm, split 3 is a pipe of Φ500mm×10mm×200mm, split 2 is a variable diameter pipe with a small end of Φ200mm, a large end of Φ500mm, a wall thickness of 10mm, and a length of 400mm. Split 1 adopts the method of extrusion + rolling to prepare pipes, and cuts out the pipes required for the preparation of special-shaped pipes; Split 2 is prepared by die forging or spinning; Split 3 is prepared by forging rings or rolling rings . A certain amount of welding shortening margin is reserved when each split is cut.

[0052] Step 2: Clamp the splits 1 and 2 to be welded on the rotating fixture and the moving fixture respectively, set the process parameters of friction welding, and start the friction welding equ...

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Abstract

The invention provides a preparation method of metal pipe fittings not prone to deform, and belongs to the field of pipe fitting preparation. The preparation method has the beneficial effects that metal reducer pipes and blind hole pipes not prone to deform are prepared through sequential split preparation and friction welding, the difficulty of overall preparation can be greatly reduced, the preparation cost is reduced, the production efficiency is improved, and the yield is increased. Friction welding is a solid phase welding method and has the technical characteristics of being high in quality, efficient and free of pollution and saving energy, and efficient and high-quality welding of the reducer pipes and blind hole pipes not prone to deform can be achieved. The dimensional precisionof the components obtained after solid phase welding is high, weld joints are narrow and are in micron orders, the tensile strength and the yield strength of the weld joints are kept consistent with those of base metal, the welding coefficients of materials can reach 0.99-1.0, the structures of the weld joints and the structure of the base metal are equivalent, or the structures of the weld jointsare thinner. The preparation method can be used for connection between similar or dissimilar metal pipes, between the pipes and rods and between the pipes and plates.

Description

technical field [0001] The invention relates to the technical field of pipe fitting preparation, in particular to a method for preparing a difficult-to-deform metal pipe fitting. Background technique [0002] At present, metal pipes with variable diameters that are difficult to deform and blind hole pipes are prepared as a whole by forging or extrusion, spinning, and then machining. Low utilization rate, low production efficiency, high cost and other shortcomings. [0003] Conventional welding methods, such as argon arc welding and electron beam welding, are all fusion welding, that is, the weld seam is in a molten state during welding. Therefore, the structure of the weld seam is thick, the weld seam is easy to oxidize, shrinkage cavities, and inclusions are easy to form. Defects, and the conventional welding method is also limited by the material and thickness of the weldment, the welding operation is cumbersome and the efficiency is not high. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 葛鹏席锦会侯鹏廖强
Owner WESTERN METAL MATERIAL
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