CN106623468A - Pipe contracting die and pipe contracting method thereof - Google Patents
Pipe contracting die and pipe contracting method thereof Download PDFInfo
- Publication number
- CN106623468A CN106623468A CN201510733262.3A CN201510733262A CN106623468A CN 106623468 A CN106623468 A CN 106623468A CN 201510733262 A CN201510733262 A CN 201510733262A CN 106623468 A CN106623468 A CN 106623468A
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- CN
- China
- Prior art keywords
- pipe
- draw
- die
- monomer
- reduction mold
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a pipe contracting die and a pipe contracting method thereof. The pipe contracting die comprises a panel, a plurality of pipe contracting single bodies and an extrusion die. An annular groove is formed in the inner side surface of the panel. The bottoms of all the pipe contracting single bodies are arranged in the annular groove, and the multiple pipe contracting single bodies are combined together to form a necking die body in a central symmetry mode. The inner side surfaces of the pipe contracting single bodies form a hollow barrel where a to-be-necked pipe is placed. Cone-shaped cambered surfaces are arranged on the outer side surfaces of the tops of the pipe contracting single bodies. The multiple pipe contracting single bodies form a conical guide part when combined together. The extrusion die is cylindrical, and the bottom of the extrusion die is provided with a trumpet opening matched with the conical guide part of the pipe contracting die. When the pipe contracting die is used, the to-be-necked pipe and the extrusion die are coaxially arranged, the to-be-necked part of the to-be-necked pipe is located in the trumpet opening, and the pipe contracting die enters the extrusion die through the trumpet opening and conducts extrusion necking on the to-be-necked part in the trumpet opening. According to the pipe contracting die and the pipe contracting method thereof, a multiple-deformation method is adopted; the single deformation quantity of the pipe is decreased; wings of the pipe are avoided; operation is easy; and the production efficiency is high.
Description
Technical field
The present invention relates to mould applications, more particularly to a kind of pipe-reduction mold and its draw method.
Background technology
It is well known that such as the pipe fitting in automobile, the pipeline of air-conditioning, its pipe end will be formed through tube or draw operation.In draw operation, by upper reducing die, the mutual extrusion fit of lower reducing die, realize the contraction of caliber, during existing necking die use, need to extrude product through product press-in die, turnover mould, cushion block, there is the weak points such as production time length, low production efficiency, manufacturing cost height, complex operation；And during extruding, because metal is easy to place flowing less to opposing force, therefore easily occurred in the intersection of upper reducing die, lower reducing die by the pipe of necking raised（Form wing）, product quality is affected, or even cause product rejection.
Pipe-reduction mold bears corresponding reaction force in deformation process, because pipe-reduction mold is integral design, the surface stress for causing pipe-reduction mold is concentrated and cannot discharged, easily there is fold or broken in pipe-reduction mold surface, substantially reduce the service life of pipe-reduction mold, increase production cost, affect production efficiency and product quality.
The content of the invention
The technical problem to be solved is to provide and a kind of avoids the occurrence of high wing, simple to operate, production efficiency, long service life pipe-reduction mold and its draw method.
In order to solve the above problems, the invention provides a kind of pipe-reduction mold, the pipe-reduction mold includes panel, multiple draw monomers, extrusion die, the medial surface of the panel is provided with annular recess, in fan-shaped column, its medial surface is cylindrical cambered surface to the draw monomer, and the bottom of each draw monomer is in the annular recess, and multiple draw monomers are combined in Central Symmetry mode and are constituted necking die body, its medial surface constitutes the hollow for disposing shrinkage waiting open pipe.
The top outside of the draw monomer is provided with taper cambered surface, and multiple draw monomers constitute coniform guide portion when being combined, and is easy to be engaged with the extrusion die of peripheral hardware.
Further, the width of the annular recess is more than the bottom wall thickness of the draw monomer, and draw monomer can be moved radially in annular recess along annular recess, is easy to carry out necking to the pipe of the shrinkage waiting open in hollow.
The medial surface adjacent bottom of the draw monomer is provided with the lug boss radially extended to inner side, and lug boss is fitted on panel when draw monomer is slidably matched with annular recess, for guiding draw monomer to move radially along annular recess.
The curved setting of medial extremity of the lug boss, when multiple draw monomers are combined in Central Symmetry mode, lug boss is combined and constitutes the middle disk with through hole, and the adapter sleeve matched with disc-shape is provided with the outside of the disk；The face plate center is provided with through hole, and lateral surface is provided with connecting portion, and the lug boss of each draw monomer is connected between the panel and adapter sleeve, is fixedly linked between the connecting portion and the adapter sleeve, prevents the draw monomer from scattering.
Further, it is fixedly linked through through hole using screw between the connecting portion and the adapter sleeve, is conveniently replaceable.
Further, the lateral surface of the draw monomer is coated with hard alloy layer, strengthens the case hardness of draw monomer, improves pipe-reduction mold service life.
Further, the medial surface of the draw monomer is fixedly installed core rod, increases the buffering between the medial surface and shrinkage waiting open pipe of draw monomer, extends die life.
The core rod is Cowhells, metallic gasket, rubber sheet gasket, at least one of plastic spacer, increases the buffering between the medial surface and shrinkage waiting open pipe of draw monomer.
Further, the extrusion die is cylindrical, and the pipe fitting of shrinkage waiting open is coaxially disposed with extrusion die when using；The bottom of the extrusion die is provided with the horn mouth matched with the coniform guide portion of pipe-reduction mold, and in horn mouth, pipe-reduction mold enters extrusion die by horn mouth in the shrinkage waiting open portion of shrinkage waiting open pipe fitting, and to the shrinkage waiting open portion in horn mouth extruding necking is carried out.
Further, elastic fluid is additionally provided between the lug boss and panel of the draw monomer, row buffering is entered to the lug boss and panel of draw monomer in necking, the lug boss for preventing draw monomer fractures, extend die life.
The elastic fluid is at least one in Cowhells, metallic gasket, rubber sheet gasket, plastic spacer, wood chip, increases the buffering between the lug boss and panel of draw monomer.
Further, the draw monomer is 8 pieces, and between each draw monomer gap is left, and prevents swollen dead between tube monomer, can be effectively improved pipe fitting deformed region shape.
A kind of method for carrying out the draw using above-mentioned pipe-reduction mold, it is characterised in that comprise the steps：
A, by pipe fitting clamping to be processed it is rearmounted enter the extrusion die that is fixedly installed in, the shrinkage waiting open portion of pipe fitting is placed in the horn mouth of extrusion die, the cone shaped pilot of necking die is directed at into horn mouth, guarantee that pipe fitting is coaxially disposed with the hollow of necking die, mobile necking die enters horn mouth and command displacement amount, the be squeezed extruding of mould of the top outside of draw monomer drives draw monomer along annular recess to contract, implements the draw.
B, the necking die is extracted, draw monomer resets, rotate the pipe-reduction mold or pipe fitting, pipe-reduction mold is inserted again the horn mouth and command displacement amount of extrusion die, draw monomer shrinks again, implements the draw.
C, circulation step B, until the pipe fitting mouth of pipe reaches preset requirement.
The connecting portion in panels outside face and the telescoping cylinder of peripheral hardware are fixedly linked, the grating scale of the amount of piston displacement in being provided with the telescoping cylinder for detecting telescoping cylinder, the output end of the grating scale is connected with the input of central controller, the output end of central controller is connected with the controller of telescoping cylinder, for controlling the displacement of telescoping cylinder piston.
Further, the angle of the rotation pipe-reduction mold or pipe fitting, the radian of the cylindrical cambered surface of no more than described draw monomer, there is fold in the surface for preventing pipe fitting.
The technique effect of invention：（1）The pipe-reduction mold of the present invention, relative to prior art, using multiformed method, reduces the single deflection of pipe fitting, it is to avoid wing occurs in pipe fitting, and the pipe fitting orifice configuration obtained after the multiple draw is more uniform；（2）Polylith tube monomer is set, pipe fitting deformed region shape is effectively improved；（3）Gap is left between draw monomer, in time the stress on release pipe-reduction mold surface, prevent pipe-reduction mold surface from fold or broken occur, increased the service life；（4）Using grating scale and the displacement stroke of central controller controls pipe-reduction mold, can be with the deflection of the effective control draw and deformation rhythm, simple to operate, production efficiency is high.
Description of the drawings
The present invention is described in further detail with reference to Figure of description：
Fig. 1 is the schematic perspective view of necking die body of the present invention；
Fig. 2 is the front view of Fig. 1；
Fig. 3 is the A-A of Fig. 2 to sectional view；
Fig. 4 is the use state schematic diagram of the present invention.
In figure：Draw monomer 1, panel 2, connecting portion 3, annular recess 4, core rod 5, elastic fluid 6, extrusion die 7, telescoping cylinder 8, piston 9, necking die body 10, lug boss 11, hollow 12, coniform guide portion 13, adapter sleeve 14, screw 15.
Specific embodiment
Embodiment 1 is as shown in Figures 1 to 4, the pipe-reduction mold of the present embodiment, including the draw monomer 1 of 2,8 fan-shaped columns of panel, the medial surface of panel 2 is provided with annular recess 4, in annular recess 4, the medial surface of each draw monomer 1 is combined in Central Symmetry mode and is constituted necking die body 10 for cylindrical cambered surface, and each draw monomer 1 for the bottom of draw monomer 1, gap is left between each draw monomer 1, its medial surface constitutes the hollow 12 for disposing shrinkage waiting open pipe.The top outside of draw monomer 1 is provided with taper cambered surface, and each draw monomer 1 constitutes coniform guide portion 13 when being combined, and is easy to be engaged with the extrusion die 7 of peripheral hardware.
The curved setting of medial extremity of lug boss 13, when each draw monomer 1 is combined in Central Symmetry mode, lug boss 13 is combined and constitutes the middle disk with through hole, and the adapter sleeve 14 matched with disc-shape is provided with the outside of the disk；The center of panel 2 is provided with through hole, and lateral surface is provided with connecting portion 3, and the lug boss of each draw monomer is connected between panel 2 and adapter sleeve 14, is fixedly linked using screw 15 between connecting portion 3 and adapter sleeve 14, prevents the draw monomer from scattering.
Extrusion die 7 is cylindrical, bottom is provided with the horn mouth matched with the coniform guide portion 13 of pipe-reduction mold, the pipe fitting of shrinkage waiting open is coaxially disposed with extrusion die 7 when using, the shrinkage waiting open portion of shrinkage waiting open pipe fitting is in horn mouth, pipe-reduction mold enters extrusion die by horn mouth, and to the shrinkage waiting open portion in horn mouth crimp is carried out.
The width of annular recess 4 is 2 times of the bottom wall thickness of draw monomer 1, draw monomer 1 can be along the radial displacement of annular recess 4 in annular recess 4, the adjacent bottom of draw monomer 1 is provided with the lug boss 11 radially extended to inner side, and between the lug boss and panel of the draw monomer Cowhells 6 is additionally provided with（Other embodiment can be metallic gasket, rubber sheet gasket, plastic spacer, wood chip）, lug boss 11 is fitted on Cowhells 6 when draw monomer 1 is slidably matched with annular recess 4, for guiding draw monomer 1 along the radial displacement of annular recess 4.
The medial surface of draw monomer 1 is fixedly installed core rod 5, and lateral surface is coated with hard alloy layer, strengthens case hardness, improves service life.
The connecting portion 3 of the lateral surface of panel 5 and the hydraulic cylinder for driving its displacement（Other embodiments can be electric cylinder or cylinder）It is fixedly linked, the grating scale for detecting its amount of piston displacement is provided with the hydraulic cylinder, the output end of the grating scale is connected with the input of central controller, and the output end of central controller is connected with the controller of hydraulic cylinder 8, for controlling the displacement of hydraulic cylinder piston 9.
Draw method using the pipe-reduction mold is as follows：
A, by pipe fitting clamping to be processed it is rearmounted enter the extrusion die 7 that is fixedly installed in, the shrinkage waiting open portion of pipe fitting is placed in the horn mouth of extrusion die 7, the cone shaped pilot 13 of necking die is directed at into horn mouth, guarantee that pipe fitting is coaxially disposed with the hollow 12 of necking die, mobile necking die enters horn mouth and command displacement amount, the be squeezed extruding of mould 7 of the top outside of draw monomer 1 drives draw monomer 1 along annular recess 4 to contract, implements the draw.
B, necking die is extracted, draw monomer 1 resets, pipe-reduction mold is rotated into 20 degree, pipe-reduction mold is inserted again the horn mouth and command displacement amount of extrusion die 7, draw monomer shrinks again, the enforcement draw.
C, circulation step B, until the pipe fitting mouth of pipe reaches preset requirement.
The present invention adopts multiformed method, reduces the single deflection of pipe fitting, it is to avoid wing occurs in pipe fitting, and the pipe fitting orifice configuration obtained after the multiple draw is more uniform；Gap is left between draw monomer, in time the stress on release pipe-reduction mold surface, prevent pipe-reduction mold surface from fold or broken occur, increased the service life；Using grating scale and the displacement stroke of central controller controls pipe-reduction mold, can be with the deflection of the effective control draw and deformation rhythm, simple to operate, production efficiency is high.
Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.There is no need to be exhaustive to all of embodiment.And among these belong to the obvious change extended out of spirit or variation of the present invention still in protection scope of the present invention.
Claims (10)
1. a kind of pipe-reduction mold, it is characterised in that include：Panel（2）, multiple draw monomers（1）, extrusion die（7）, the panel（2）Medial surface be provided with annular recess（4）, each draw monomer（1）Bottom be located at the annular recess（4）It is interior, and multiple draw monomers（1）It is combined in Central Symmetry mode and is constituted necking die body（10）, its medial surface composition hollow（12）, the draw monomer（1）Top outside be provided with taper cambered surface, multiple draw monomers（1）Coniform guide portion is constituted when being combined（13）, it is easy to the extrusion die with peripheral hardware（7）It is engaged.
2. pipe-reduction mold according to claim 1, it is characterised in that the extrusion die（7）It is cylindrical, the extrusion die（7）Bottom be provided with coniform guide portion with pipe-reduction mold（13）The horn mouth for matching.
3. pipe-reduction mold according to claim 1, it is characterised in that the annular recess（4）Width be more than the draw monomer（1）Bottom wall thickness, draw monomer（1）In annular recess（4）It is interior can be along annular recess（4）Radial displacement.
4. pipe-reduction mold according to claim 1, it is characterised in that the draw monomer（1）Medial surface adjacent bottom be provided with the lug boss radially extended to inner side（11）, draw monomer（1）With annular recess（4）Lug boss when being slidably matched（11）It is fitted in panel（2）On.
5. pipe-reduction mold according to claim 4, it is characterised in that the lug boss（11）The curved setting of medial extremity, multiple draw monomers（1）When being combined in Central Symmetry mode, lug boss（11）The disk with through hole in the middle of constituting is combined, the adapter sleeve matched with disc-shape is provided with the outside of the disk（14）；The panel（2）Center is provided with through hole, and lateral surface is provided with connecting portion（3）, the lug boss of each draw monomer（11）It is connected to the panel（2）And adapter sleeve（14）Between, the connecting portion（3）With the adapter sleeve（14）It is fixedly linked.
6. pipe-reduction mold according to claim 4, it is characterised in that the draw monomer（1）Lug boss（11）With panel（2）Between be provided with elastic fluid（6）, the elastic fluid（6）For at least one in Cowhells, metallic gasket, rubber sheet gasket, plastic spacer, wood chip.
7. the method that the pipe-reduction mold described in a kind of one of application claim 1 to 6 carries out the draw, it is characterised in that comprise the steps：
A, by pipe fitting clamping to be processed it is rearmounted enter the extrusion die that is fixedly installed（7）It is interior, the shrinkage waiting open portion of pipe fitting is placed in into extrusion die（7）Horn mouth in, by the cone shaped pilot of necking die（13）Alignment horn mouth, it is ensured that the hollow of pipe fitting and necking die（12）It is coaxially disposed, mobile necking die enters horn mouth and command displacement amount, draw monomer（1）Top outside be squeezed mould extruding drive draw monomer（1）Along annular recess to contract, implement the draw；
B, necking die is extracted, draw monomer（1）Reset, rotate pipe-reduction mold or pipe fitting, pipe-reduction mold is inserted again the horn mouth and command displacement amount of extrusion die, draw monomer (1) shrinks again, implements the draw；
C, circulation step B, until the pipe fitting mouth of pipe reaches preset requirement.
8. method according to claim 7, it is characterised in that：Panel（2）Lateral surface be provided with connecting portion（3）, the connecting portion（3）With the telescoping cylinder for driving its displacement（8）It is fixedly linked, the telescoping cylinder（8）Inside it is provided with for detecting telescoping cylinder（8）Piston（9）The grating scale of displacement.
9. method according to claim 7, it is characterised in that：The output end of the grating scale is connected with the input of central controller, and the output end of central controller is connected with the controller of telescoping cylinder, for controlling the displacement of telescoping cylinder piston.
10. method according to claim 7, it is characterised in that：The angle of the pipe-reduction mold or pipe fitting is rotated, no more than described draw monomer（1）Cylindrical cambered surface radian.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510733262.3A CN106623468B (en) | 2015-10-31 | 2015-10-31 | A kind of pipe-reduction mold and its draw method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510733262.3A CN106623468B (en) | 2015-10-31 | 2015-10-31 | A kind of pipe-reduction mold and its draw method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106623468A true CN106623468A (en) | 2017-05-10 |
| CN106623468B CN106623468B (en) | 2019-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510733262.3A Active CN106623468B (en) | 2015-10-31 | 2015-10-31 | A kind of pipe-reduction mold and its draw method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107745051A (en) * | 2017-10-26 | 2018-03-02 | 华南理工大学 | A kind of thin metallic tubd necking die and necking method |
| CN109940097A (en) * | 2019-04-30 | 2019-06-28 | 河南时捷机械设备有限公司 | Hollow type nozzle constriction device |
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| JP2004114147A (en) * | 2002-09-30 | 2004-04-15 | Sango Co Ltd | Method and device for reducing tube diameter |
| CN101157098A (en) * | 2007-10-22 | 2008-04-09 | 江苏合丰机械制造有限公司 | Contracted pipe shaping mold |
| CN101298088A (en) * | 2007-04-30 | 2008-11-05 | 张家港市合丰机械制造有限公司 | Pipe-reduction mold |
| CN201389572Y (en) * | 2009-05-05 | 2010-01-27 | 钱宗富 | Pipe cold extrusion reducing device |
| CN201543736U (en) * | 2009-09-29 | 2010-08-11 | 沈阳市汽车开关厂 | Hollow tube reducing device |
| CN205074366U (en) * | 2015-10-31 | 2016-03-09 | 常州良旭车辆配件有限公司 | Pipe -reduction mold |
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2015
- 2015-10-31 CN CN201510733262.3A patent/CN106623468B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004114147A (en) * | 2002-09-30 | 2004-04-15 | Sango Co Ltd | Method and device for reducing tube diameter |
| CN101298088A (en) * | 2007-04-30 | 2008-11-05 | 张家港市合丰机械制造有限公司 | Pipe-reduction mold |
| CN101157098A (en) * | 2007-10-22 | 2008-04-09 | 江苏合丰机械制造有限公司 | Contracted pipe shaping mold |
| CN201389572Y (en) * | 2009-05-05 | 2010-01-27 | 钱宗富 | Pipe cold extrusion reducing device |
| CN201543736U (en) * | 2009-09-29 | 2010-08-11 | 沈阳市汽车开关厂 | Hollow tube reducing device |
| CN205074366U (en) * | 2015-10-31 | 2016-03-09 | 常州良旭车辆配件有限公司 | Pipe -reduction mold |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107745051A (en) * | 2017-10-26 | 2018-03-02 | 华南理工大学 | A kind of thin metallic tubd necking die and necking method |
| CN107745051B (en) * | 2017-10-26 | 2023-04-07 | 华南理工大学 | Necking die and necking method for thin-wall metal pipe |
| CN109940097A (en) * | 2019-04-30 | 2019-06-28 | 河南时捷机械设备有限公司 | Hollow type nozzle constriction device |
| CN109940097B (en) * | 2019-04-30 | 2024-01-26 | 河南时捷机械设备有限公司 | Hollow pipe orifice shrinking device |
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| Publication number | Publication date |
|---|---|
| CN106623468B (en) | 2019-02-22 |
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