CN109058631A - A kind of threeway pipe production method - Google Patents
A kind of threeway pipe production method Download PDFInfo
- Publication number
- CN109058631A CN109058631A CN201810878701.3A CN201810878701A CN109058631A CN 109058631 A CN109058631 A CN 109058631A CN 201810878701 A CN201810878701 A CN 201810878701A CN 109058631 A CN109058631 A CN 109058631A
- Authority
- CN
- China
- Prior art keywords
- bending plate
- clinohedral
- tube body
- tubulose
- protrusion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/02—Branch units, e.g. made in one piece, welded, riveted
- F16L41/021—T- or cross-pieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a kind of threeway pipe production methods, belong to pipeline field, make to contact at the top of inclined-plane and bending plate first, the top relative tilt of inclined-plane and bending plate is arranged simultaneously, move clinohedral toward the inside of tubulose protrusion along the axial of tubulose protrusion, straight part is dialled in moving process, the inclined-plane of clinohedral is extruded in the top of bending plate, and the edge for driving the top of bending plate upwardly opening is mobile.The present invention will gradually be located at the bending plate at upper opening by the inclined-plane of clinohedral and turn down towards outside, so that a part of waste material in existing tee tube production process is capable of forming a part of tee tube, reduce the generation of waste material, make to reduce the time required to punching course with power in tee tube intermediate production process simultaneously, energy consumption is reduced, is saved water.
Description
[technical field]
The present invention relates to a kind of threeway pipe production methods, belong to pipeline field.
[background technique]
The production method of tee tube is by pipeline both ends while impacting water flow, and the centre of pipeline is squeezed spirogyrate
At a tubulose protrusion with arc sealing surface, integral cutting then is formed to arc sealing surface, formed one it is complete
Tee tube.For the tubulose protrusion of productive target size, the water flow progress punching press of precisely pressure for a long time, therefore its are needed
Production process has very big counter productive in terms of environment and energy consumption.
[summary of the invention]
A kind of tee tube producer is provided technical problem to be solved by the present invention lies in overcome the deficiencies in the prior art
The production cost of tee tube is effectively reduced in method, reduces waste material and generates.
Above-mentioned technical problem is solved, the present invention adopts the following technical scheme: a kind of threeway pipe production method, based on one kind three
Siphunculus intermediate and group straight part,
Tee tube intermediate includes tube body and tubulose protrusion, and one end of tubulose protrusion and the side wall of tube body are fixed, pipe
The other end of shape protrusion offers the upper opening with the internal run-through of tubulose protrusion, and the edge of upper opening is fixedly installed folding
Bent plate, bending plate are located at the outside of tubulose protrusion, and the bottom of bending plate is fixed on the edge of upper opening, the top position of bending plate
In the top of the bottom of bending plate, the top of bending plate is located at the middle upper part of upper opening,
Dialling straight part includes having bevelled clinohedral；
Make to contact at the top of inclined-plane and bending plate first, while the top relative tilt of inclined-plane and bending plate is arranged, then
It moves clinohedral toward the inside of tubulose protrusion along the axial of tubulose protrusion, dials straight part in moving process, clinohedral
Inclined-plane is extruded in the top of bending plate, and the edge for driving the top of bending plate upwardly opening is mobile.
The bending plate at upper opening will be gradually located at by the inclined-plane of clinohedral to turn down towards outside, so that existing tee tube
A part of waste material in production process is capable of forming a part of tee tube, reduces the generation of waste material, while making tee tube
It is reduced the time required to punching course with power in intermediate production process, reduces energy consumption, saved water.
Tee tube intermediate of the present invention the preparation method is as follows: being filled the water simultaneously to the both ends of tube body, from tube body both ends
The water flow of injection converges in tube body, then to the inner wall punching press of tube body, the inner wall of tube body by after punching press to far from tube body
Axis direction deformation forms tubulose protrusion and arc sealing surface, and it is remote that upper opening and arc sealing surface are respectively positioned on tubulose protrusion
One end from tube body, arc sealing surface are directed away from the axis direction protrusion of tube body, and arc sealing surface is separate by tubulose protrusion
One end of tube body seals, and then cuts to the centre of arc sealing surface, and the arc sealing surface after cutting forms bending plate, until
The preparation of this tee tube intermediate terminates.
The axis of tubulose protrusion of the present invention perpendicular to tube body axis, the shape of arc sealing surface be it is vaulted, on
The shape of opening is circle, when cutting to the centre of arc sealing surface, is cut, is rolled over along the direction for being parallel to upper opening
Circular targeting port is formed on the top of bent plate.
The shape of clinohedral of the present invention is truncated cone-shaped, and inclined-plane is the side of clinohedral, the bottom surface diameter of clinohedral
Less than the upper bottom surface diameter of clinohedral, before inclined-plane is contacted with the top of bending plate, the bottom surface diameter of clinohedral, which is not more than, is led
To the diameter of mouth, the upper bottom surface diameter of clinohedral is greater than the diameter of targeting port.
Cylindrical arrangement column is provided at the top of clinohedral of the present invention, arrange column bottom surface and clinohedral it is upper
Bottom surface is fixed, and the diameter for arranging column is not less than the upper bottom surface diameter of clinohedral, and the diameter for arranging column is not more than tubulose protrusion
Diameter.
The diameter of the present invention for arranging column is equal to the inner diameter of tubulose protrusion, axis of the clinohedral along tubulose protrusion
The inside for yearning for tubulose protrusion is mobile, until separating at the top of inclined-plane and bending plate, then arranges the top that column drives bending plate
It is mobile that portion continues upwardly opening edge, until bending plate forms tubulose, the diameter of the bending plate of tubulose and the diameter of upper opening
It is identical, and the bending plate of tubulose and tubulose protrusion are coaxially disposed.
The shape of clinohedral of the present invention is positive rotary table, and the angle of the central axis of the bus and clinohedral of clinohedral is
5 °~45 °.
The other features and advantages of the invention will the detailed exposure in following specific embodiment, attached drawing.
[Detailed description of the invention]
Following further describes the present invention with reference to the drawings:
Fig. 1 is the flow sheet of comparative example tee tube of the present invention；
Fig. 2 is the flow sheet of tee tube of the embodiment of the present invention；
Fig. 3 is tee tube of embodiment of the present invention intermediate schematic diagram of main cross-sectional structure；
Fig. 4 is the schematic view of the front view that the embodiment of the present invention dials straight part.
[specific embodiment]
The technical solution of the embodiment of the present invention is explained and illustrated below with reference to the attached drawing of the embodiment of the present invention, but under
It states embodiment to be merely a preferred embodiment of the present invention, and not all.Based on the implementation example in the implementation mode, those skilled in the art
Obtained other embodiments without making creative work, belong to protection scope of the present invention.
In the following description, occur term "inner", "outside", "upper", "lower", the indicating positions such as "left", "right" or
Positional relationship is to be based on the orientation or positional relationship shown in the drawings, description embodiment merely for convenience and simplified description, and
It is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, because
This is not considered as limiting the invention.
Comparative example.
Referring to Fig. 1.
Existing threeway pipe production method is as follows:
A kind of tube body 1 is chosen, the shape of tube body 1 is linear type, and the both ends of tube body 1 are respectively left opening 111 and right opening
131, the uniform wall thickness of tube body 1 at this time.Then to the left opening 111 of tube body 1 and it is right opening 131 simultaneously towards tube body 1 centre
It is filled the water, then the water flow injected from 1 both ends of tube body rushes the inner wall of the middle section of tube body 1 in the intermediate convergence of tube body 1
Pressure.At this point, tube body 1 is from left to right successively divided into tube body left part 11, tube body middle part 12 and tube body right part 13, left opening 111 is
In the left end of tube body left part 11, right opening 131 is i.e. 12 in the middle part of the right end of tube body right part 13, the right end and tube body of tube body left part 11
Left end connection, 12 right end is connected to the left end of tube body right part 13 in the middle part of tube body.In tube body left part 11 and tube body right part 13
Under flow action, the wall thickness of tube body left part 11 and tube body right part 13 starts thinning, while tube body left part 11 and tube body right part 13
12 movement in the middle part of tube body is increasingly towards by the inner wall section that current scour is fallen.After 12 upper inside walls are by punching press in the middle part of tube body
To the axis direction far from tube body 1, i.e., top in this comparative example, deformation occurs, forms a tubulose protrusion 2 and an arc
Sealing surface 3.12 is fixed in the middle part of tubulose protrusion 2 and tube body.Wherein the lower end of tubulose protrusion 2 is under shed, under shed and
12 penetrate through in the middle part of tube body.The upper end of tubulose protrusion 2 is upper opening, and upper opening and arc sealing surface 3 are respectively positioned on tubulose protrusion
The one end of portion 2 far from tube body 1.Wherein, arc sealing surface 3 is directed away from the axis direction of tube body 1, i.e., in this comparative example to
It protrudes above, the one end of arc sealing surface 3 by tubulose protrusion 2 far from tube body 1, i.e. the upper end sealing of tubulose protrusion 2.Meanwhile
12 downside wall thickness obviously increases in the middle part of tube body.
Direction and the pressure of water flow are passed through from left opening 111 and right opening 131 by being rationally arranged, so that tubulose protrusion
2 axis perpendicular to tube body 1 axis, while the shape of arc sealing surface 3 be it is vaulted.Tubulose protrusion in this comparative example
2 height is h1, the height of arc sealing surface 3 is h2。
Arc sealing surface 3 is cut away completely finally, tube body 1 and tubulose protrusion 2 is formed and together forms tee tube, three
The side pipe height of siphunculus is that the height of tubulose protrusion 2 is h1。
Embodiment.
Referring to fig. 2.
A kind of tube body 1 is chosen, the shape of tube body 1 is linear type, and the both ends of tube body 1 are respectively left opening 111 and right opening
131, the uniform wall thickness of tube body 1 at this time.Then to the left opening 111 of tube body 1 and it is right opening 131 simultaneously towards tube body 1 centre
It is filled the water, then the water flow injected from 1 both ends of tube body rushes the inner wall of the middle section of tube body 1 in the intermediate convergence of tube body 1
Pressure.At this point, tube body 1 is from left to right successively divided into tube body left part 11, tube body middle part 12 and tube body right part 13, left opening 111 is
In the left end of tube body left part 11, right opening 131 is i.e. 12 in the middle part of the right end of tube body right part 13, the right end and tube body of tube body left part 11
Left end connection, 12 right end is connected to the left end of tube body right part 13 in the middle part of tube body.In tube body left part 11 and tube body right part 13
Under flow action, the wall thickness of tube body left part 11 and tube body right part 13 starts thinning, while tube body left part 11 and tube body right part 13
12 movement in the middle part of tube body is increasingly towards by the inner wall section that current scour is fallen.After 12 upper inside walls are by punching press in the middle part of tube body
To the axis direction far from tube body 1, i.e., top in the present embodiment, deformation occurs, forms a tubulose protrusion 2 and arc closing
Face 3.12 is fixed in the middle part of tubulose protrusion 2 and tube body.Wherein the lower end of tubulose protrusion 2 is under shed, under shed and tube body
Middle part 12 penetrates through.The upper end of tubulose protrusion 2 is upper opening, and it is remote that upper opening and arc sealing surface 3 are respectively positioned on tubulose protrusion 2
One end from tube body 1.Wherein, arc sealing surface 3 is directed away from the axis direction of tube body 1, i.e., protruding upward in the present embodiment, arc
The one end of Shape closed face 3 by tubulose protrusion 2 far from tube body 1, i.e. the upper end sealing of tubulose protrusion 2, the side of arc sealing surface 3
The coincident of edge and upper opening.Meanwhile 12 downside wall thickness obviously increases in the middle part of tube body.
Direction and the pressure of water flow are passed through from left opening 111 and right opening 131 by being rationally arranged, so that tubulose protrusion
2 axis perpendicular to tube body 1 axis, while the shape of arc sealing surface 3 be it is vaulted, the shape of upper opening is circle.This reality
The height for applying tubulose protrusion 2 in example is h3, the height of arc sealing surface 3 is h4。
Then the centre of arc sealing surface 3 is cut, cutting is oriented parallel to upper opening, at this time remaining arc
Sealing surface 3 forms bending plate 4.At this point, the bottom of bending plate 4 is fixed on the edge of upper opening, it is convex that bending plate 4 is located at tubulose
The outside in portion 2 out, the top of bending plate 4 are located at the top of the bottom of bending plate 4, and the top of bending plate 4 is located in upper opening
Between top, circular targeting port 5 is formed on the top of bending plate 4.The center of circle of targeting port 5 and the center of circle of upper opening are located at tubulose protrusion
On the axis in portion 2, the center of circle of targeting port 5 is in the top in the center of circle of upper opening, and the diameter of targeting port 5 is less than the straight of upper opening
Diameter.So far bending plate 4, tubulose protrusion 2 and tube body 1 constitute a kind of tee tube intermediate.Wherein the height of bending plate 4 is
h5。
At this point, turning down by one group of straight part to bending plate 4, play the role of the flaring of targeting port 5.Wherein, straight part is dialled
Including having bevelled clinohedral 6.
First contact inclined-plane and the top of bending plate 4, while the top relative tilt of inclined-plane and bending plate 4 is arranged, so
It moves clinohedral 6 toward the inside of tubulose protrusion 2 along the axial of tubulose protrusion 2, dials straight part in moving process, inclined-plane
The inclined-plane of body 6 is extruded in the top of bending plate 4, and the top of bending plate 4 is slided on inclined-plane, drives the top of bending plate 4 upward
The edge of opening is mobile.
It is matched in order to be adapted with the shape of targeting port 5 and the shape of tee tube intermediate integrated symmetric, this reality
It applies in example and clinohedral 6 is shaped to truncated cone-shaped, inclined-plane is the side of rotary table, the bottom surface diameter of clinohedral 6 at this time
Less than the upper bottom surface diameter of clinohedral 6.Clinohedral 6 can drive the top of entire bending plate 4 towards upper opening simultaneously at this time
Edge is mobile, plays the effect that bending plate 4 integrally turns down.
Before inclined-plane is contacted with the top of bending plate 4, the bottom surface diameter of clinohedral 6 is not more than the diameter of targeting port 5, together
When clinohedral 6 upper bottom surface diameter should be greater than targeting port 5 diameter and be not more than tubulose protrusion 2 diameter.
During bending plate 4 turns down, bending plate 4 is increasingly becoming a part of tubulose protrusion 2, so that bending plate 4
Length becomes the height of tubulose protrusion 2, in a disguised form increases the height of tubulose protrusion 2.If in order to enable tubulose protrusion 2 is most
H is highly remained as eventually1As long as guaranteeing h3It is equal to h with the sum of the length of bending plate 41, so that among the present embodiment tee tube
The height that the height of tubulose protrusion 2 compares tubulose protrusion 2 in comparative example in body production process is reduced, therefore right
It answers and is passed through water flow pressure, water and punching press time in the present embodiment tee tube intermediate production process and is reduced, reduce
Energy consumption.The inner wall thickness of 12 downside of tube body middle part, which compares comparative example, simultaneously can also be reduced, so that the present embodiment
The tee tube wall thickness that middle production obtains is more uniform.The shape of the shape and clinohedral 6 of upper opening is mutually matched simultaneously, so that turning over
Bending plate 4 after folding can cooperate with tubulose protrusion 2, the side pipe shape of the more tee tube of standard of formation one.
In addition, the angle of the central axis of the bus and clinohedral 6 of clinohedral 6 should be 5 °~45 °, selected in the present embodiment
Take 15 °.Under regular situation, clinohedral 6 is in the top court that can't make bending plate 4 in moving process into tubulose protrusion 2
Upward opening edge is mobile, but will drive the top of bending plate 4 towards moving inside tubulose protrusion 2.But the present embodiment
Middle discovery, the angle of the central axis of the bus and clinohedral 6 of clinohedral 6 at 15 °, bending plate 4 with clinohedral 6 movement
Not only will not towards moving inside tubulose protrusion 2, can be acted on instead due to frictional force it is mobile towards upper opening edge, effective gram
Use prejudice at this stage is taken.
Preferably, the top of clinohedral 6 is provided with cylindrical arrangement column 7, the bottom surface and clinohedral 6 of column 7 are arranged
Upper bottom surface fix, arrange column 7 diameter be not less than clinohedral 6 upper bottom surface diameter, arrange column 7 diameter no more than tubulose it is convex
The diameter in portion 2 out.Arrangement column 7 serves not only as an operation portion and plays guiding and control to the movement of clinohedral 6, if while inclined-plane
It also fails to completely turn down out bending plate 4 when body 6 is completely into tubulose protrusion 2, it is convex towards tubulose to arrange the continuation of column 7 at this time
It can play the role of carrying out secondary fold to bending plate 4 when being moved in portion 2 out.
As the further preferred of above scheme, the diameter for arranging column 7 is equal to the inner diameter of tubulose protrusion 2, simultaneously
The diameter for arranging column 7 is equal to the upper bottom surface diameter of clinohedral 6.Clinohedral 6 is along the axial toward tubulose protrusion 2 of tubulose protrusion 2
Inside it is mobile, until inclined-plane is separated with the top of bending plate 4, bending plate 4 forms tubulose at this time, then arranges column 7 and drives and rolls over
The bending plate 4 of tubulose is modified in the subtle activity in the top of bent plate 4, the diameter of the bending plate 4 of tubulose and the diameter of upper opening
It is identical, and the bending plate 4 of tubulose and tubulose protrusion 2 are coaxially disposed.Bending plate 4 is become into pipe completely by arranging column 7 at this time
A part of shape protrusion 2, so that tee tube intermediate forms the tee tube of a standard completely.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, is familiar with
The those skilled in the art should be understood that the present invention includes but is not limited to attached drawing and interior described in specific embodiment above
Hold.Any modification without departing from function and structure principle of the invention is intended to be included in the range of claims.
Claims (7)
1. a kind of threeway pipe production method, it is characterised in that:
Based on a kind of tee tube intermediate and straight part is dialled,
Tee tube intermediate includes tube body and tubulose protrusion, and one end of tubulose protrusion and the side wall of tube body are fixed, and tubulose is convex
The other end in portion offers the upper opening with the internal run-through of tubulose protrusion out, and the edge of upper opening is fixedly installed bending
Plate, bending plate are located at the outside of tubulose protrusion, and the bottom of bending plate is fixed on the edge of upper opening, and the top of bending plate is located at
The top of the bottom of bending plate, the top of bending plate are located at the middle upper part of upper opening,
Dialling straight part includes having bevelled clinohedral；
Make to contact at the top of inclined-plane and bending plate first, while the top relative tilt of inclined-plane and bending plate is arranged, then make tiltedly
Face body is moved along the axial inside toward tubulose protrusion of tubulose protrusion, dials straight part in moving process, the inclined-plane of clinohedral
It is extruded in the top of bending plate, the edge for driving the top of bending plate upwardly opening is mobile.
2. threeway pipe production method according to claim 1, it is characterised in that: the preparation method of tee tube intermediate is such as
Under: the both ends of tube body are filled the water simultaneously, the water flow injected from tube body both ends converges in tube body, then to the inner wall of tube body
Punching press, the inner wall of tube body are formed tubulose protrusion and arc sealing surface by the axis direction deformation after punching press to separate tube body,
Upper opening and arc sealing surface are respectively positioned on the one end of tubulose protrusion far from tube body, and arc sealing surface is directed away from the axis of tube body
Tubulose protrusion is sealed far from one end of tube body, is then carried out to the intermediate of arc sealing surface by direction protrusion, arc sealing surface
Cutting, the arc sealing surface after cutting form bending plate, and so far tee tube intermediate preparation terminates.
3. threeway pipe production method according to claim 2, it is characterised in that: the axis of the tubulose protrusion perpendicular to
The axis of tube body, the shape of arc sealing surface be it is vaulted, the shape of upper opening is circle, is cut to the centre of arc sealing surface
When cutting, cut along the direction for being parallel to upper opening, circular targeting port is formed on the top of bending plate.
4. threeway pipe production method according to claim 3, it is characterised in that: the shape of the clinohedral is truncated cone-shaped,
Inclined-plane is the side of clinohedral, and the bottom surface diameter of clinohedral is less than the upper bottom surface diameter of clinohedral, the top on inclined-plane and bending plate
Before portion's contact, the bottom surface diameter of clinohedral is not more than the diameter of targeting port, and the upper bottom surface diameter of clinohedral is greater than targeting port
Diameter.
5. threeway pipe production method according to claim 4, it is characterised in that: be provided with cylinder at the top of the clinohedral
The arrangement column of shape, the upper bottom surface of the bottom surface and clinohedral that arrange column are fixed, and the diameter for arranging column is not less than the upper bottom of clinohedral
Face diameter.
6. threeway pipe production method according to claim 5, it is characterised in that: it is convex that the diameter for arranging column is equal to tubulose
The inner diameter in portion out, clinohedral is moved along the axial inside toward tubulose protrusion of tubulose protrusion, until inclined-plane and bending
The top of plate separates, and then arranges column and the top of bending plate is driven to continue upwardly opening edge movement, until bending plate is formed
Tubulose, the diameter of the bending plate of tubulose and the diameter of upper opening are identical, and the bending plate of tubulose and tubulose protrusion are coaxially disposed.
7. according to threeway pipe production method described in claim 3 or 4 or 5 or 6, it is characterised in that: the shape of the clinohedral
Be positive rotary table, and the angle of the central axis of the bus and clinohedral of clinohedral is 5 °~45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810878701.3A CN109058631A (en) | 2018-08-03 | 2018-08-03 | A kind of threeway pipe production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810878701.3A CN109058631A (en) | 2018-08-03 | 2018-08-03 | A kind of threeway pipe production method |
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| Publication Number | Publication Date |
|---|---|
| CN109058631A true CN109058631A (en) | 2018-12-21 |
Family
ID=64833125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810878701.3A Pending CN109058631A (en) | 2018-08-03 | 2018-08-03 | A kind of threeway pipe production method |
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| CN106984688A (en) * | 2017-05-31 | 2017-07-28 | 佛山市南海鼎标精工机械有限公司 | A kind of three-way pipe water swelling mould |
| CN207138628U (en) * | 2017-09-07 | 2018-03-27 | 彭康能 | A kind of T-shaped three water flowing is risen mould |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH295158A (en) * | 1950-09-18 | 1953-12-15 | Ici Ltd | Method and device for the production of pipe fittings. |
| JPH0513628U (en) * | 1991-02-19 | 1993-02-23 | 日本バルジ工業株式会社 | Molding machine for headed teeth |
| JP2001191125A (en) * | 2000-01-05 | 2001-07-17 | Koa Seisakusho:Kk | Manufacturing method of branched tube |
| JP2001286947A (en) * | 2000-03-31 | 2001-10-16 | Kawasaki Hydromechanics Corp | Bulged end part forming method for tube hydroforming |
| US20080034824A1 (en) * | 2004-02-13 | 2008-02-14 | Daimlerchrysler Ag | Method and Device for Producing a Peripherally Closed Hollow Profile |
| JP2007105788A (en) * | 2005-10-17 | 2007-04-26 | Nisshin Steel Co Ltd | Piercing method and counterpunch used therefor |
| CN102240720A (en) * | 2011-05-16 | 2011-11-16 | 台州市通力制冷元件有限公司 | Environment-friendly liquid extrusion method |
| CN103934346A (en) * | 2013-01-22 | 2014-07-23 | 赵伟星 | Technology of manufacturing seamless inclined three-way steel pipe fitting in cold-extrusion mode |
| CN105772566A (en) * | 2016-05-05 | 2016-07-20 | 广东思豪液压机械有限公司 | Integral tee joint copper pipe forming mould |
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| CN207138628U (en) * | 2017-09-07 | 2018-03-27 | 彭康能 | A kind of T-shaped three water flowing is risen mould |
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