CN1023817C - T-branch used in pipe-lines and shaping technology thereof - Google Patents

T-branch used in pipe-lines and shaping technology thereof Download PDF

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Publication number
CN1023817C
CN1023817C CN 90106377 CN90106377A CN1023817C CN 1023817 C CN1023817 C CN 1023817C CN 90106377 CN90106377 CN 90106377 CN 90106377 A CN90106377 A CN 90106377A CN 1023817 C CN1023817 C CN 1023817C
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CN
China
Prior art keywords
pipe
superplastic
tube
moulding
technology
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Expired - Fee Related
Application number
CN 90106377
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Chinese (zh)
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CN1059961A (en
Inventor
王春荣
宋海龙
富醇良
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Institute of Metal Research of CAS
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Institute of Metal Research of CAS
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Priority to CN 90106377 priority Critical patent/CN1023817C/en
Publication of CN1059961A publication Critical patent/CN1059961A/en
Application granted granted Critical
Publication of CN1023817C publication Critical patent/CN1023817C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The present invention relates to a three-way pipe for a pipeline and a moulding technology thereof. The present invention is mainly characterized in that the three-way pipe is made of superplastic alloy, and the moulding technology comprises the processes: the superplastic preparation of a pipe blank; the superplastic gas expansion and the extrusion composite force moulding; cutting end heads, opening grooves and the rust prevention treatment. The three-way pipe and the moulding technology which are provided by the present invention have the advantages of simple technology, few devices, small power for moulding, uniform thickness of walls of obtained three-way pipes, high use pressure bearing, high precision and no secondary processing.

Description

T-branch used in pipe-lines and shaping technology thereof
The present invention relates to the accessory commonly used in the transfer line, a kind of withstand voltage Y-tube and forming technology thereof promptly are provided.
Y-tube is an indispensable accessory commonly used in oil, the chemical industry transfer line.Not high pressure resistant because the Y-tube in the heating pipeline exists sand holes, so can not be used for oil, chemical industry transfer line.Generally adopt at present both at home and abroad cold extrusion technology to produce Y-tube in oil, the chemical industry transfer line, but the required equipment of this technology is huge, and compacting pressure is also very high, and an equipment needs ten thousand yuan of 70-80, moreover, the three-way tube wall thickness ununiformity after the moulding is even.Except that above-mentioned manufacturing process, the domestic people of having adopts another method, promptly in pipe, put into threaded ball, on tube wall, open a hole, insert threaded pull bar from this hole and be threaded, then pull bar is applied pulling force and produces Y-tube with the pipe endosphere, adopt this method shaping Y-tube, though need not that price is the most expensive, volume is doted on big equipment, the three-way tube wall thickness ununiformity after being shaped is even, and the Y-tube height of pulling out also is restricted.
The purpose of this invention is to provide a kind of wall thickness evenly, bear the high production technique of applying pressure, equipment used is simple, power consumption is little, the Y-tube and the forming technology thereof of the superplastic gas-bulging of less investment and the moulding of extruding composite force.
The present invention utilizes superplastic alloy to be easy to the principle of uniform deformation along the crystal boundary slippage at specified conditions, selecting the superplastic alloy pipe for use is blank, be placed on and limit in the mould, under the temperature of superplastic forming, make Y-tube by the inflatable and the effect of extruding composite force, its reparation technology is made up of following operation:
1, superplastic gas-bulging and extruding composite force are shaped
To have superplastic pipe material and put into the mould that two lobe moulds are formed, seal two opening ends with extrusion stem by external force with conductivity, connect power supply, pipe and mould are electrically heated to the temperature of superplastic forming, be incubated, press then given pace bubbling air or nitrogen, meanwhile extrusion stem to the relative direction pusher, finishes until shaping under external force;
2, cut the termination, open groove
The blind end of the good Y-tube that is shaped is removed, reprocess out 45 ° of weld seam grooves of other three port, in addition, can apply rustproof layer from the teeth outwards according to product needed.
Be described in detail withstand voltage Y-tube of embodiment 1-superplasticity 20 steel provided by the present invention and forming technology thereof below in conjunction with accompanying drawing
Sectional view when accompanying drawing 1 is the Y-tube shaping.
The pipe that machining is good heats 890 ℃ of temperature, is incubated 15 minutes, the shrend of coming out of the stove then, and so thermal cycling is three times, and obtaining grain fineness number is 5-7llm, and unit elongation is σ>200%.Again with φ 45mm, wall thickness 4.0mm, the superplasticity 20 steel pipe bases 1 of long 120mm are put into the mould of being made up of two lobe moulds 2, use tapering circular boop 3 behind the matched moulds, 4 compress, extrusion stem 5,6 respectively with power connection 7,8 connect, provide 12V by high current transformer 9, the power supply of 1600A power, by extrusion stem pipe 1 is carried out electrically heated, insert 11 pairs of pipe thermometrics of thermopair of band magnetic tube by hole 10, scavenging action is also played in hole 10 simultaneously, when temperature is heated to 750 ℃ by extrusion stem 5,6 two ends apply 20 tons of relative squeezes to pipe, 12 send into nitrogen 100-120atm from the hole in the time of extruding.After shaping finishes, cut away the termination of Y-tube one end, car goes out 45 ° of weld seam grooves of other three port again, applies rust-inhibiting paint at last.
By the superplasticity 20 steel Y-tubes that the present invention obtained, inside and outside any surface finish, precision height need not reprocessed.After dissecting in addition, wall thickness is even, and maximum reduction is no more than 12%, and same pieces is born the applying pressure height relatively, and the Y-tube intensity behind the superplastic forming is suitable with normality 20 hardness of steel.
Embodiment 2 super-plastic Zn-Al alloys are withstand voltage antirust Y-tube and forming technology
To have superplastic Zn-Al alloy pipe and put into the mould that two lobe moulds are formed, the forming technology of this Zn-Al alloy Y-tube removes 265 ℃ of forming temperatures, squeeze is 7 tons, and the bulging atmospheric pressure is beyond the 15atm, and other operation and processing condition are all the same with embodiment 1.In addition, this Y-tube needn't be coated with rust-inhibiting paint.
Embodiment 3, and a kind of Tl-6Al-4V is heat-resisting, withstand voltage, antirust, protection against corrosion Y-tube and forming technology.
To have superplastic Tl-6Al-4V pipe and put into the mould that two lobe moulds are formed, it is 930 ℃ that this forming technology removes forming temperature, and squeeze is 30 tons, and beyond the bulging atmospheric pressure 150-170atm, other processing condition are the same with embodiment 1.In addition, needn't be coated with rust-inhibiting paint.
In sum as can be seen, withstand voltage Y-tube provided by the present invention and forming technology thereof, its technology is simple, and equipment used is few, and the shaping required drive is little, and the Y-tube wall thickness of acquisition is even, bears applying pressure height, precision height, does not need secondary processing.

Claims (2)

1, a kind of moulding process of Y-tube is characterized in that it is made up of following operation:
(1) superplastic gas-bulging is shaped with the extruding composite force
To have superplastic pipe material and put into the mould that two lobe moulds are formed, seal two opening ends with extrusion stem by external force with conductivity, connect power supply, pipe and mould are electrically heated to the temperature of superplastic forming, insulation, by given pace bubbling air or nitrogen, meanwhile extrusion stem is following to the relative direction pusher with effect outside, finishes until shaping then;
(2) cut the termination, open groove
The termination of the good Y-tube that is shaped is removed, reprocessed out 45 ° of weld seam grooves of other three port.
2, by the described moulding process of claim 1, it is characterized in that: when making raw material with No. 20 steel, need that in advance it is carried out thermal cycling and handle, so that obtain superplasticity, specific embodiment is as follows:
Heating of pipe blank to 890 ℃ is incubated 15 minutes, the shrend of coming out of the stove, and so heat is followed three times.
CN 90106377 1990-09-17 1990-09-17 T-branch used in pipe-lines and shaping technology thereof Expired - Fee Related CN1023817C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 90106377 CN1023817C (en) 1990-09-17 1990-09-17 T-branch used in pipe-lines and shaping technology thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 90106377 CN1023817C (en) 1990-09-17 1990-09-17 T-branch used in pipe-lines and shaping technology thereof

Publications (2)

Publication Number Publication Date
CN1059961A CN1059961A (en) 1992-04-01
CN1023817C true CN1023817C (en) 1994-02-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 90106377 Expired - Fee Related CN1023817C (en) 1990-09-17 1990-09-17 T-branch used in pipe-lines and shaping technology thereof

Country Status (1)

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CN (1) CN1023817C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101537437B (en) * 2009-04-22 2011-01-05 浙江飞挺管业有限公司 Special pressure relief device for manufacturing three-way pipe fittings by cold extrusion forming
CN103920744B (en) * 2014-05-04 2016-01-27 唐山诚达建设集团有限公司 A kind of band arm pipe fitting one process equipment
CN104070101B (en) * 2014-06-25 2016-03-02 郑州万达重工股份有限公司 Heavy wall bimetallic three-way pipe cold pressing forming process
CN107695624B (en) * 2017-09-29 2019-07-19 北京科勒有限公司 The production method of bathroom hardware shell
CN109590676A (en) * 2018-11-02 2019-04-09 陈志城 A kind of preparation process of novel hydraulic molding trolley

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CN1059961A (en) 1992-04-01

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