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Electric assistant heating forming device and method for dissimilar material complicated section pipe fittings

A dissimilar material, heat forming technology, applied in the processing of rods or profiles, metal plates or pipes, can solve the problems of easy cracking of welds, deformation and thinning of pipe fittings, and uncoordinated deformation, so as to promote the coordination of deformation and solve the problems of pipe fittings Shape and size changes, increasing the effect of active materials

Active Publication Date: 2019-01-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the above problems, the present invention proposes an electric-assisted heating inflatable forming device and forming method for complex cross-section pipe fittings of dissimilar materials. Problems such as severe deformation and thinning in the area of ​​large expansion rate, etc., realize rapid prototyping of pipe fittings with complex cross-sections of dissimilar materials

Method used

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  • Electric assistant heating forming device and method for dissimilar material complicated section pipe fittings
  • Electric assistant heating forming device and method for dissimilar material complicated section pipe fittings
  • Electric assistant heating forming device and method for dissimilar material complicated section pipe fittings

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Experimental program
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Effect test

Embodiment 1

[0058] Such as figure 2 As shown, the tube blank 9 to be processed is formed by welding a tube of material A and a tube of material B;

[0059] Such as image 3 The electric-assisted heating inflatable forming device for pipe fittings with complex cross-sections of dissimilar materials shown,

[0060] Including: an inner covering tube 10 with a non-uniformly distributed wall thickness that is placed in the tube blank 9 and matched with the gap, an inflatable forming mold 8 sleeved on the tube blank 9, and an inflatable forming mold 8 sleeved on the tube blank 9 The restraint collars 7 on both sides, the left side indenter 6 and the right side indenter 12 corresponding to the two ends of the tube blank 9 and welded to it, and the left side indenter 6 are connected by bolts 5 and one end extends into the inner cover The left sealing push head 4 in the tube 10, the right sealing push head 13 connected with the right pressure head 12 by bolts 5 and one end extends into the inner cover...

Embodiment 2

[0077] Such as figure 2 As shown, the tube blank 9 to be processed is welded by a pipe fitting of material A and a pipe fitting of material B;

[0078] Adjustable local area electric heating inflatable forming device for complex cross-section pipes of dissimilar materials, such as Figure 7 As shown, the difference between it and the inflatable forming device in the first embodiment is: the structure of the inner cavity of the inflatable forming mold 8 is different, and the inner cavity of the inflatable forming mold 8 in the first embodiment is a circumferential curved surface The cavity, and the inner cavity of the inflatable forming mold 8 in the second embodiment is two circumferentially curved cavities with different cross-sections alternately.

[0079] An adjustable local area electric heating air inflation forming method for pipe fittings with complex cross-sections of dissimilar materials, refer to figure 1 , 2 , 6, 7, and 8. Steps 1 to 5 of this method are the same as the ...

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Abstract

The invention discloses an electric assistant heating forming device and method for dissimilar material complicated section pipe fittings. Pipe blanks welded by dissimilar material pipes and inner coating pipes positioned in the pipe blanks are positioned in an air expansion forming mold; two ends of the pipe blanks are sealed through sealing push heads and elastic sealing blocks; the positions offlexible copper blocks are adjusted by using advancement and retreating of push rods to realize local area heating; high-pressure gas is injected in the inner coating pipes to enable the pipe blanksto quickly bond on molds; meanwhile, the push heads are pushed for feeding; after formation, the heating is stopped; the high-pressure gas in the pipe blanks is relieved; formed double-layer pipe fittings are taken out; and the inner coating pipes are removed through acid washing to obtain final pipe fittings. The device and the method are suitable for expansion of the dissimilar material pipes, solve the problems of inharmonious deformation in expansion of traditional dissimilar material pipe blanks and rupture of welding lines through local heating and coating plate expansion, also can be used for gradual formation of pipe fittings in multiple expansion areas, meet urgent demands in such fields as aerospace, and achieve high practical value.

Description

Technical field [0001] The invention relates to an electric auxiliary heating forming device and method for pipe fittings with complex cross-sections of dissimilar materials, belonging to the field of processing and processing metal plates or tubes, rods or profiles. Background technique [0002] In order to obtain the ideal structural strength and adapt to the specific use environment, tubular parts often have complex axes and constantly changing cross-sectional shapes and sizes along the axis. Such pipes are mostly used in automotive, aviation, aerospace and other fields, such as air inlets, Combustion chamber, tail nozzle, etc.; at the same time, in order to meet the requirements of light weight reduction, good service performance, safety and reliability, etc., processing methods that apply high pressure inside the tube billet to make the tube billet bulge. [0003] In fact, for the high-temperature service complex pipe fittings such as the exhaust nozzle and the intake duct, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/051B21D26/045B21D26/059B21D37/16
CPCB21D26/045B21D26/051B21D26/059B21D37/16
Inventor 武永吴迪鹏范荣磊陈明和谢兰生
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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