CN102773307A - Forming process of parallel three-way connector - Google Patents

Forming process of parallel three-way connector Download PDF

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Publication number
CN102773307A
CN102773307A CN2012102939373A CN201210293937A CN102773307A CN 102773307 A CN102773307 A CN 102773307A CN 2012102939373 A CN2012102939373 A CN 2012102939373A CN 201210293937 A CN201210293937 A CN 201210293937A CN 102773307 A CN102773307 A CN 102773307A
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China
Prior art keywords
elbow
parallel
way connection
temperature
bend
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CN2012102939373A
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CN102773307B (en
Inventor
张敬业
范国
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HENAN EVERBRIGHT TUBE INDUSTRY CO LTD
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HENAN EVERBRIGHT TUBE INDUSTRY CO LTD
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Priority to CN201210293937.3A priority Critical patent/CN102773307B/en
Publication of CN102773307A publication Critical patent/CN102773307A/en
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Abstract

The invention discloses a forming process of a parallel three-way connector. The central axes of three interfaces of the parallel three-way connector are parallel, wherein the two interfaces are respectively placed at the two ends of an elbow; another interface is placed at the middle part of the elbow; the toward direction of the interface is inverse with the interfaces of the elbow two ends. The forming method comprises the following steps of: thermally treating a bend made of a steel tube, after flattening and heating the bend, putting the bend between two pressed half molds, pressing the pipe orifices of the two ends of the bend to extrude the bend towards the direction of an extruding tank when the two half pressed half molds are assembled, so as to form a convex closure; after heating, reshaping a reshaping mold; using an broaching core to expand the hole in the convex closure to the aperture of the three-way interface; and obtaining the parallel three-way connector after finishing, thermally heating and machining. Via the way of firstly manufacturing the elbow and secondly processing branch pipes, the damages of the branch pipes are avoided, and the elbow with very small bending radius can be manufactured; according to the forming way, a trimming die is not needed, so that the inconvenience caused by the trimming die used in the elbow is avoided, the forming process is simple and the efficiency is high.

Description

The moulding process of parallel three-way connection
Technical field
The present invention designs a kind of moulding process of three-way connection, specifically a kind of moulding process of parallel three-way connection.
Background technology
Common three-way connection is divided into threeway of T type and skew T, and the threeway of T type is normally put into shaping mould with a straight tube pipe, and the punch die of the stretching arm of in pipe, packing into presses on stretched arm on the pipe wall to punch die.And after skew T normally processes the shape of T type threeway, again its bending machining is processed.No matter be threeway of T type or skew T, 3 interfaces all are to distribute radially, and it is bigger to connect the shared space of pipeline.Need connect the equipment of a large amount of pipelines for boiler etc., how to greatest extent pipe laying becomes and needs a problem solving in limited space.Discover,, and reduce the spacing of pipeline as far as possible, just can significantly improve the quantity that is provided with of pipeline if three pipelines that are connected in the threeway are parallel to each other.But according to the processing method of common skew T, this threeway is difficult to machine-shaping.At first, make the pipeline of connection parallel, the axis at three-way interface place must be parallel to each other, and can be referred to as parallel three-way connection.Such three-way connection angle of bend is very big, need reach 180 °, and during according to the processing method crooked pipeline of skew T, bending radius is bigger, and can destroy stretched arm in advance.If adopt the mode of casting, then exist the cast member profile big, hidden danger of quality is many, the big problem of welding difficulty.
Summary of the invention
Technical problem to be solved by this invention provides a kind of moulding process of parallel three-way connection, can process the parallel three-way connection that the axis of three interfaces is parallel to each other, and moulding process is simple, efficient is high, and crudy is good.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be: the moulding process of parallel three-way connection; The axis of three interfaces of said parallel three-way connection is parallel to each other; Parallel three-way connection main part is that an angle of bend is 180 ° a bend pipe; Wherein two interfaces of three-way connection lay respectively at the two ends of bend pipe, and another interface is positioned at the middle part of bend pipe, and this interface towards with the interface at bend pipe two ends towards on the contrary; Its forming method comprises the steps:
Step 1, adopt the manufacturing materials of seamless steel pipe as three-way connection, the diameter of selected steel pipe is greater than the diameter of parallel three-way connection main part bend pipe.
Step 2, to adopt elbow pushing equipment that selected steel pipe pushing is become angle of bend be 180 ° elbow, and the plug preheat temperature of pushing equipment is 750-800 ℃, and elbow pushing temperature is 1000 ℃-1100 ℃.
Step 3, the elbow that pushing is good carry out normalized treatment with 1040 ℃-1058 ℃ temperature earlier, carry out temper with 680 ℃-730 ℃ temperature again.
Step 4, the elbow that step 3 is handled well are put into heating furnace and are heated to 1000 ℃-1050 ℃, and constant temperature flattened elbow to 70-80% of original diameter along its bending radius direction after the taking-up more than 30 minutes;
Step 5, the elbow after will flattening are heated to 1000 ℃-1050 ℃; Be placed on then between two compacting half modules that make in advance; Suppress the forming tank that is provided with the U type on the relative face of half module at two; The degree of depth of forming tank is the half the of the parallel three-way connection main part of finished product bend pipe diameter, is provided with and the corresponding extruding groove of elbow middle part body at an end of forming tank.
Step 6, exert pressure, in two compacting half module matched moulds, the pressure of press device is acted on the mouth of pipe at elbow two ends, to the extruding of extruding groove direction, make the body at elbow middle part in extruding groove, form a convex closure at elbow to two compacting half modules.
Step 7, the elbow that will be formed with convex closure are put into heating furnace and are heated to 1000 ℃-1050 ℃; And constant temperature at least 30 minutes, taking out afterwards and use the shaping mould shaping, described shaping mould is made up of two half modules; Two relative faces of half module are provided with the shaping groove identical with parallel three-way connection shape; The elbow that has convex closure after the heating is placed in the shaping groove, exerts pressure to two half modules, to the elbow squeezing shaping.
A hole is opened on step 8, the convex closure top on the elbow after the shaping, puts into heating furnace then and is heated to 1000 ℃-1050 ℃, with the bore of reaming fuse with the bore expansion on the convex closure to three-way interface, forms parallel three-way connection blank.
Step 9, parallel three-way connection blank is repaired, polished, the excision redundance also stays allowance.
Step 10, the parallel three-way connection blank that will trim carry out normalized treatment with 1040 ℃-1058 ℃ temperature earlier, carry out temper with 680 ℃-730 ℃ temperature again.
Step 11, the parallel three-way connection blank of step 10 being handled well according to design size carry out end face, beveling machine processing, carry out Non-Destructive Testing afterwards, promptly make parallel three-way connection after qualified.
Contain C 0.08-0.12%, Si 0.20-0.50%, Mn 0.30-0.60%, P≤0.020%, S≤0.010%, Cr 8.00-9.50% in the seamless steel pipe of being selected for use.
In the step 2, evenly smear lubricant at the inwall of seamless steel pipe earlier, and then seamless steel pipe is enclosed within on the plug of pushing equipment.
In the step 2, during the pushing moulding, adopt the mode of heating in medium frequency that the steel pipe that runs to the core rod forming head is carried out local heat, the temperature when making steel pipe through the core rod forming head reaches 1000 ℃-1100 ℃.
In the step 6, during the compacting convex closure, the final pressure temperature of elbow is 800 ℃.
In the step 7, during to elbow compacting shaping, the final pressure temperature is 800 ℃.
The invention has the beneficial effects as follows: adopt system bend pipe earlier, the mode of back processing arm on bend pipe has been avoided the damage arm, and can have been made the very little bend pipe of bending radius.In two compacting half module matched moulds, exert pressure to the elbow two ends, can in extruding groove, extrude a convex closure, thereby process arm.Therefore, this molding mode needn't adopt punch die, has avoided using in the bend pipe inconvenience of punch die, and moulding process is simple, and efficient is high.The parallel three-way connection of processing is formed in one, and tightness is good.The pipeline that connects is parallel to each other, and the I of spacing reaches 8mm, and it is very little to take up room, and the high density comb that can solve the cooling of boiler component or chemical industry connects a difficult problem.
Description of drawings
Fig. 1 is the structural representation of the parallel three-way connection of the present invention.
Fig. 2 is the elbow sketch map that the steel pipe pushing becomes.
Fig. 3 is the elbow sketch map that is formed with convex closure.
Fig. 4 is the sketch map of parallel three-way connection blank.
Fig. 5 is the sketch map of compacting half module.
Fig. 6 is the pressing mode sketch map of convex closure on the elbow.
Fig. 7 is the half module sketch map that constitutes shaping mould.
Mark among the figure: 1, bend pipe, 2, interface, 3, elbow, 4, the compacting half module, 401, forming tank, 402, extruding groove, 5, convex closure, 6, shaping mould, 601, the shaping groove.
The specific embodiment
Specify embodiment of the present invention in conjunction with accompanying drawing.
Parallel three-way connection according to the invention is as shown in Figure 1; The axis at its three interface 2 places is parallel to each other; Parallel three-way connection main part is that an angle of bend is 180 ° a bend pipe 1; Wherein two interfaces of three-way connection lay respectively at the two ends of bend pipe 1, and another interface is positioned at the middle part of bend pipe 1, and this interface towards with the interface at bend pipe 1 two ends towards on the contrary.
The moulding process of parallel three-way connection comprises the steps:
Step 1, adopt the manufacturing materials of seamless steel pipe as three-way connection, the diameter of selected steel pipe is generally 1.2-1.4 times of bend pipe 1 diameter greater than the diameter of parallel three-way connection main part bend pipe 1.
Step 2, to adopt elbow pushing equipment that selected steel pipe pushing is become angle of bend as shown in Figure 2 be 180 ° elbow 3, and the plug preheat temperature of pushing equipment is 750-800 ℃, and elbow pushing temperature is 1000 ℃-1100 ℃.During the pushing moulding, adopt the mode of heating in medium frequency that the steel pipe that runs to the core rod forming head is carried out local heat, the temperature when making steel pipe through the core rod forming head reaches 1000 ℃-1100 ℃.Adopt the mode of local heat can prevent that pushing from being other position compressive deformation of steel pipe, thereby improve the quality of products, and reached energy-conservation effect.
Step 3, the elbow 3 that pushing is good carry out normalized treatment with 1040 ℃-1058 ℃ temperature earlier, carry out temper with 680 ℃-730 ℃ temperature again; When normalizing and temper, programming rate is less than 200 ℃/h, and the processing time is confirmed according to the elbow wall thickness.
Step 4, the elbow 3 that step 3 is handled well are put into heating furnace and are heated to 1000 ℃-1050 ℃, and constant temperature flattened elbow 3 to 70-80% of original diameter along its bending radius direction after the taking-up more than 30 minutes.
Step 5, the elbow 3 after will flattening are heated to 1000 ℃-1050 ℃; Be placed on then between two compacting half modules 4 that make in advance; On the relative face of two compacting half modules 4, be provided with the forming tank 401 of U type; The degree of depth of forming tank 401 is the half the of the parallel three-way connection main part of finished product bend pipe 1 diameter, is provided with and the corresponding extruding groove 402 of elbow 3 middle part bodys at an end of forming tank 401.Elbow 3 is placed in the forming tank 401 afterwards because bigger two the compacting half modules 4 of caliber still can't matched moulds.
Step 6, as shown in Figure 6ly exert pressure to two compacting half modules 4, in two compacting half module 4 matched moulds, the pressure of press device is acted on the mouth of pipe at elbow 3 two ends, to the extruding of extruding groove direction, the direction of arrow is represented the pressure action direction among the figure with elbow 3.The metal of elbow 3 tube walls since the effect of pressure flow to extruding groove 402, thereby make the body at elbow 3 middle parts in extruding groove 402, form a convex closure 5.As shown in Figure 3 after the compression moulding.Because elbow is crushed in advance before matched moulds; Therefore has the space between elbow and compacting half module 4 extruding grooves 402 inwalls; In the matched moulds process; Elbow be squeezed need earlier by flat recoverys circular filling up forming tank 401, thereby avoided elbow that compacting half module 4 is caused excessive active force, improved the service life of suppressing half module.In the process of compacting convex closure, the final pressure temperature be controlled,, the compacting of heating continued can be taken out if can't a compression moulding more than 800 ℃.
Step 7, the elbow 3 that will be formed with convex closure 5 are put into heating furnace and are heated to 1000 ℃-1050 ℃, and constant temperature at least 30 minutes, take out afterwards with shaping mould 6 shapings; Described shaping mould 6 is made up of two half modules; Two relative faces of half module are provided with the shaping groove 601 identical with parallel three-way connection shape, and the elbow that has convex closure 53 after the heating is placed in the shaping groove 601, exerts pressure to two half modules; To the elbow squeezing shaping, the final pressure temperature during compacting will be controlled at more than 800 ℃ equally.
A hole is opened on step 8,5 tops of the convex closure on the elbow after the shaping 3; Can adopt the mode of boring or cutting; Hold successfully and put into heating furnace behind the hole and be heated to 1000 ℃-1050 ℃; With the bore of reaming fuse, form parallel three-way connection blank as shown in Figure 4 with the bore expansion on the convex closure 5 to three-way interface; The reaming fuse can adopt the little version of the big end of an end, is convenient to operation, and raises the efficiency.
Step 9, parallel three-way connection blank is repaired, polished, the excision redundance also stays allowance.
Step 10, the parallel three-way connection blank that will trim carry out normalized treatment with 1040 ℃-1058 ℃ temperature earlier, carry out temper with 680 ℃-730 ℃ temperature again; When normalizing and temper, programming rate is less than 200 ℃/h, and the processing time is confirmed according to the elbow wall thickness.
Step 11, the parallel three-way connection blank of step 10 being handled well according to design size carry out end face, beveling machine processing, and processing mode carries out according to the processing technology and the requirement of common pipe fitting, carries out Non-Destructive Testing afterwards, promptly make parallel three-way connection after qualified.
Contain C 0.08-0.12%, Si 0.20-0.50%, Mn 0.30-0.60%, P≤0.020%, S≤0.010%, Cr 8.00-9.50% in the seamless steel pipe of being selected for use; The three-way connection intensity that this material is processed is high; High temperature resistant, high pressure resistant, serviceability is good.
In the step 2, evenly smear lubricant at the inwall of seamless steel pipe earlier, and then seamless steel pipe is enclosed within on the plug of pushing equipment, can improve the quality and the pushing efficient of pushing bend pipe.

Claims (6)

1. the moulding process of parallel three-way connection; It is characterized in that: the axis that said three interfaces of parallel three-way connection (2) are located is parallel to each other; Parallel three-way connection main part is that an angle of bend is 180 ° a bend pipe (1); Wherein two interfaces of three-way connection lay respectively at the two ends of bend pipe (1), and another interface is positioned at the middle part of bend pipe (1), and this interface towards with the interface at bend pipe (1) two ends towards on the contrary; Its forming method comprises the steps:
Step 1, adopt the manufacturing materials of seamless steel pipe as three-way connection, the diameter of selected steel pipe is greater than the diameter of parallel three-way connection main part bend pipe (1);
Step 2, to adopt elbow pushing equipment that selected steel pipe pushing is become angle of bend be 180 ° elbow (3), and the plug preheat temperature of pushing equipment is 750-800 ℃, and elbow pushing temperature is 1000 ℃-1100 ℃;
Step 3, the elbow (3) that pushing is good carry out normalized treatment with 1040 ℃-1058 ℃ temperature earlier, carry out temper with 680 ℃-730 ℃ temperature again;
Step 4, the elbow (3) that step 3 is handled well are put into heating furnace and are heated to 1000 ℃-1050 ℃, and constant temperature flattened elbow (3) to 70-80% of original diameter along its bending radius direction after the taking-up more than 30 minutes;
Step 5, the elbow (3) after will flattening are heated to 1000 ℃-1050 ℃; Be placed on then between two the compacting half modules (4) that make in advance; On the relative face of two compacting half modules (4), be provided with the forming tank (401) of U type; The degree of depth of forming tank (401) is the half the of the parallel three-way connection main part of finished product bend pipe (1) diameter, an end of forming tank (401) be provided with elbow (3) in the middle part of the corresponding extruding groove (402) of body;
Step 6, to two the compacting half modules (4) exert pressure; In two compacting half module (4) matched moulds; The pressure of press device is acted on the mouth of pipe at elbow (3) two ends; To the extruding of extruding groove direction, make the body at elbow (3) middle part in extruding groove (402), form a convex closure (5) at elbow (3);
Step 7, the elbow (3) that will be formed with convex closure (5) are put into heating furnace and are heated to 1000 ℃-1050 ℃; And constant temperature at least 30 minutes, taking out with shaping mould (6) shaping afterwards, described shaping mould (6) is made up of two half modules; Two relative faces of half module are provided with the shaping groove (601) identical with parallel three-way connection shape; The elbow that has convex closure (5) (3) after the heating is placed in the shaping groove (601), exerts pressure to two half modules, to the elbow squeezing shaping;
A hole is opened on step 8, convex closure (5) top on the elbow after the shaping (3), puts into heating furnace then and is heated to 1000 ℃-1050 ℃, with the bore of reaming fuse with bore expansion to the three-way interface on the convex closure (5), forms parallel three-way connection blank;
Step 9, parallel three-way connection blank is repaired, polished, the excision redundance also stays allowance;
Step 10, the parallel three-way connection blank that will trim carry out normalized treatment with 1040 ℃-1058 ℃ temperature earlier, carry out temper with 680 ℃-730 ℃ temperature again;
Step 11, the parallel three-way connection blank of step 10 being handled well according to design size carry out end face, beveling machine processing, carry out Non-Destructive Testing afterwards, promptly make parallel three-way connection after qualified.
2. the moulding process of parallel three-way connection as claimed in claim 1 is characterized in that: contain C 0.08-0.12%, Si 0.20-0.50%, Mn 0.30-0.60%, P≤0.020%, S≤0.010%, Cr 8.00-9.50% in the seamless steel pipe of being selected for use.
3. the moulding process of parallel three-way connection as claimed in claim 1 is characterized in that: in the step 2, evenly smear lubricant at the inwall of seamless steel pipe earlier, and then seamless steel pipe is enclosed within on the plug of pushing equipment.
4. the moulding process of parallel three-way connection as claimed in claim 1; It is characterized in that: in the step 2; During the pushing moulding, adopt the mode of heating in medium frequency that the steel pipe that runs to the core rod forming head is carried out local heat, the temperature when making steel pipe through the core rod forming head reaches 1000 ℃-1100 ℃.
5. the moulding process of parallel three-way connection as claimed in claim 1 is characterized in that: in the step 6, during the compacting convex closure, the final pressure temperature of elbow is 800 ℃.
6. the moulding process of parallel three-way connection as claimed in claim 1 is characterized in that: in the step 7, during to elbow compacting shaping, the final pressure temperature is 800 ℃.
CN201210293937.3A 2012-08-17 2012-08-17 Forming process of parallel three-way connector Active CN102773307B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103394547A (en) * 2013-07-30 2013-11-20 西安优耐特容器制造有限公司 Elbow forming method
CN104942135A (en) * 2015-06-19 2015-09-30 沧州隆泰迪管道科技有限公司 Y-shaped seamless tee pressing technology
CN104942041A (en) * 2015-06-19 2015-09-30 沧州隆泰迪管道科技有限公司 T-shaped large-diameter composite tee joint technology
CN108326075A (en) * 2018-02-09 2018-07-27 岳阳筑盛阀门管道有限责任公司 The cold forming process of nuclear power fast reactor pressure pipe threeway
CN111375990A (en) * 2018-12-29 2020-07-07 上海新闵重型锻造有限公司 Manufacturing method of S-shaped elbow

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB751571A (en) * 1950-10-02 1956-06-27 Andre Huet An improved process for the manufacture of tubes with branch connections
GB1173031A (en) * 1966-01-08 1969-12-03 Steinmueller Gmbh L & C A Method of Producing Tube Bifurcations
CN2174677Y (en) * 1993-09-19 1994-08-17 肖恺伯 Side-water coll wall seamless steel bifurcated pipe for boiler
CN1318439A (en) * 2000-04-14 2001-10-24 阜新市压力容器管道公司 Manufacture of Y-type seam-less T-joint
CN101693338A (en) * 2009-10-26 2010-04-14 江阴海陆冶金设备制造有限公司 Preparation method of reducing breeches tee joint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB751571A (en) * 1950-10-02 1956-06-27 Andre Huet An improved process for the manufacture of tubes with branch connections
GB1173031A (en) * 1966-01-08 1969-12-03 Steinmueller Gmbh L & C A Method of Producing Tube Bifurcations
CN2174677Y (en) * 1993-09-19 1994-08-17 肖恺伯 Side-water coll wall seamless steel bifurcated pipe for boiler
CN1318439A (en) * 2000-04-14 2001-10-24 阜新市压力容器管道公司 Manufacture of Y-type seam-less T-joint
CN101693338A (en) * 2009-10-26 2010-04-14 江阴海陆冶金设备制造有限公司 Preparation method of reducing breeches tee joint

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103394547A (en) * 2013-07-30 2013-11-20 西安优耐特容器制造有限公司 Elbow forming method
CN104942135A (en) * 2015-06-19 2015-09-30 沧州隆泰迪管道科技有限公司 Y-shaped seamless tee pressing technology
CN104942041A (en) * 2015-06-19 2015-09-30 沧州隆泰迪管道科技有限公司 T-shaped large-diameter composite tee joint technology
CN108326075A (en) * 2018-02-09 2018-07-27 岳阳筑盛阀门管道有限责任公司 The cold forming process of nuclear power fast reactor pressure pipe threeway
CN108326075B (en) * 2018-02-09 2019-09-24 岳阳筑盛阀门管道有限责任公司 The cold forming process of nuclear power fast reactor pressure pipe threeway
CN111375990A (en) * 2018-12-29 2020-07-07 上海新闵重型锻造有限公司 Manufacturing method of S-shaped elbow

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