CN103722038B - A kind of lubricating method of hot extrusion steel tube external mold - Google Patents
A kind of lubricating method of hot extrusion steel tube external mold Download PDFInfo
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- CN103722038B CN103722038B CN201310732693.9A CN201310732693A CN103722038B CN 103722038 B CN103722038 B CN 103722038B CN 201310732693 A CN201310732693 A CN 201310732693A CN 103722038 B CN103722038 B CN 103722038B
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Abstract
A kind of lubricating method of hot extrusion steel tube external mold, comprise the steps: 1) changeover portion between extrusion die planar section and calibrating strap is designed as groove, placing a glass annulus in groove, glass annulus and extrusion die contact surface are answered gapless, are divided into arc transition with extrusion die non-contact portion；Lubricating end surface glass isolator is fixed on the extrusion die end face of extrusion die；The internal diameter of extrusion billet lubricating end surface glass isolator is than extrusion die groove diameter big 10～20mm；2) recipient end face is close to extrusion die end face and locks；3) blank heated is loaded recipient, carry out extrusion process.When lubricating method of the present invention solves steel tube extrusion, extrusion die metal inlet arc section easily glues metal and scraps problem, improves the service life of extrusion die, and improves pipe outer surface quality.
Description
Technical field
The present invention is belonging to Lubrication Technique In Plastic Working of Metals field, particularly to a kind of hot extrusion steel tube
The lubricating method of external mold.
Background technology
Hot extrusion method produces difficulty deformation, the widely used method of high alloy tubing.See Fig. 1, metal
At the near closed hollow ring formed by recipient 4, dummy block 2, plug 1, extrusion die 6 and other instruments
Inside it is in three-dimensional compressive stress state, is conducive to giving full play to the plasticity of metal so that difficult-to-deformation material energy
Obtain relatively large plastometric set, under the effect of the axial compressive force that metal provides at pressure ram, by extrusion die 6
Tubing is formed with flowing out in the annular gap of plug 1 composition.
The outer surface of tubing is that the outer surface by blank 3 is along recipient 4, glass isolator 5, die holder and extruding
The surfaces such as mould 6 are formed after sequentially slipping over and deforming outflow extrusion die calibrating strap, thus outer metallic surface
And the quality of pipe outer surface and the life-span of tool and mould are had to closing weight by the lubrication state between tool and mould
The impact wanted.
The part that extrusion die 6 contacts with flow of metal district by planar section, entrance arc section, calibrating strap and
Outlet back taper is constituted, and has glass isolator 5 between planar section and deformable metal, and deformable metal is along glass isolator table
Sliding in face, solid glass is heated to molten state and with metal to the entrance circular arc of extrusion die by high-temperature metal
Duan Liudong, metal is separated by the suitable melten glass of viscosity with extrusion die, plays lubrication and protection mould
Effect.
In extrusion process, the entrance arc section of extrusion die subjects the normal pressure of maximum, Er Qie
In industry extrusion process, tube surfaces temperature has larger fluctuation, thus causes the glass lubricant used
Viscosity larger fluctuation occurs, when lubricant temperature raise, viscosity reduce time, lubricant is high
Easily run off from open calibrating strap under normal pressure effect, thus cause deformable metal to enter with extrusion die
Mouth circular arc band forms bigger frictional force, causes entrance arc section to glue metal and cause outside tubing time serious
Surface tear, and make mould scrap.
Summary of the invention
It is an object of the invention to provide the lubricating method of a kind of hot extrusion steel tube external mold, solve steel pipe and squeeze
During pressure, extrusion die metal inlet arc section easily glues metal and scraps problem, improves the use longevity of extrusion die
Life, and improve pipe outer surface quality.
For reaching above-mentioned purpose, technical scheme is as follows:
The lubricating method of a kind of hot extrusion steel tube external mold, comprises the steps:
1) changeover portion between extrusion die planar section and calibrating strap is designed as groove, places in groove
One glass annulus, glass annulus and extrusion die contact surface answer gapless, with extrusion die noncontact
Part is arc transition；Lubricating end surface glass isolator is fixed on the extrusion die end face of extrusion die
On；The internal diameter of extrusion billet lubricating end surface glass isolator is bigger than extrusion die groove diameter
10～20mm；
2) recipient end face is close to extrusion die end face and locks；
3) blank heated is loaded recipient, carry out extrusion process.
Further, when glass annulus makes, glass dust is abundant in the ratio of 100:1～5 with waterglass
Mixing, and be not less than with unit are under forcing press under the pressure of 10MPa and be fully compacted, and fully
Solidify and be dried.
The useful art effect of the present invention:
Change the entrance arc section of extrusion die into lubricant prefabricated ring, make between deformable metal and mould
Bonding probability eliminate, and during flow of metal, provide enough lubricants, it is ensured that extrusion die
In whole deformation process, keep good working order, by changing lubricant ring, make the extrusion die can
Need not frequently change to reuse, make the life-span of mould be greatly improved.
By coordinating of glass isolator internal diameter and lubricant ring size, make deformable metal and extrusion die planar section
Expansion effect, make the surface quality of tubing be guaranteed.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing tubing hot extrusion.
Fig. 2 is the schematic diagram of extrusion die of the present invention.
Fig. 3 is the schematic diagram of tubing hot extrusion of the present invention.
Detailed description of the invention
The invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings.
Seeing Fig. 2, Fig. 3, the lubricating method of a kind of hot extrusion steel tube external mold of the present invention, including as follows
Step:
1) changeover portion between extrusion die 6 planar section 61 and calibrating strap 62 is designed as groove 63,
Placing a glass annulus 7 in groove, glass annulus 7 and extrusion die 6 contact surface answer gapless, with crowded
Pressing mold non-contact portion is divided into arc transition；Lubricating end surface glass isolator 5 is fixed on squeezing of extrusion die 6
On pressing mold end face 61；Extrusion billet lubricating end surface with the internal diameter D1 of glass isolator 5 than extrusion die 6 groove
Diameter D2 big 10～20mm；
2) recipient 4 end face is close to extrusion die 6 end face and locks；
3) blank 3 heated is loaded recipient 4, carry out extrusion process.
Further, when glass annulus makes, glass dust is abundant in the ratio of 100:1～5 with waterglass
Mixing, and be not less than with unit are under forcing press under the pressure of 10MPa and be fully compacted, and fully
Solidify and be dried.
Extrusion die pelvic inlet plane section and calibrating strap changeover portion are designed as groove, before extrusion, pre-by one
First put into groove by drip ring-glass annulus.Change the entrance arc section on extrusion die into drip ring
After, enough lubricants can be obtained during high-temperature metal deformation and supplement, it is to avoid extrusion die entrance circular arc
Section surface directly contacts with deformable metal and the phenomenon of viscous metal occurs.
The making of lubricant annulus requires: is mixed homogeneously with waterglass by glass dust, puts into mould,
On forcing press compressing, briquetting pressure 15MPa, dried for standby after molding, with guarantee lubrication circle
Ring has enough intensity, it is to avoid broken when the initial stage of extruding.
Stay the gap of 10～about 15mm between the outside of glass isolator endoporus and lubricant annulus, make deformation
Metal contacts with die surface with lubricant melted on glass isolator, and the thickness making lubricant layer is moderate,
And make metal surface smooth, to guarantee the metal surface quality after extruding.
By said method, the life-span of extrusion die can be made to be greatly improved, improve extrusion die
Access times, thus reduce the replacing number of times of extrusion die, improve the productivity ratio of extruder.
Claims (1)
1. a lubricating method for hot extrusion steel tube external mold, comprises the steps:
1) changeover portion between extrusion die planar section and calibrating strap is designed as groove, places in groove
One glass annulus, glass annulus and extrusion die contact surface answer gapless, with extrusion die noncontact
Part is arc transition；Lubricating end surface glass isolator is fixed on the extrusion die end face of extrusion die
On；The internal diameter of extrusion billet lubricating end surface glass isolator is bigger than extrusion die groove diameter
10～20mm；Wherein, when glass annulus makes, glass dust and waterglass are pressed 100:1～5
Ratio be sufficiently mixed, and be not less than with unit are under forcing press under the pressure of 10MPa
Fully compacting, and fully solidify and be dried；
2) recipient end face is close to extrusion die end face and locks；
3) blank heated is loaded recipient, carry out extrusion process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310732693.9A CN103722038B (en) | 2013-12-26 | 2013-12-26 | A kind of lubricating method of hot extrusion steel tube external mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310732693.9A CN103722038B (en) | 2013-12-26 | 2013-12-26 | A kind of lubricating method of hot extrusion steel tube external mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103722038A CN103722038A (en) | 2014-04-16 |
| CN103722038B true CN103722038B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310732693.9A Active CN103722038B (en) | 2013-12-26 | 2013-12-26 | A kind of lubricating method of hot extrusion steel tube external mold |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105439526B (en) * | 2014-08-08 | 2017-11-03 | 宝钢特钢有限公司 | The preparation method of steel pipe hot extrusion glass lubrication pad |
| CN108238724A (en) * | 2016-12-26 | 2018-07-03 | 北京有色金属研究总院 | A kind of hot extrusion pressure lubricating pads production method with compound glass |
| CN109909311B (en) * | 2017-12-12 | 2020-05-12 | 宝钢特钢有限公司 | Method for separating pipe hot extrusion residue from pipe body |
| CN113245391B (en) * | 2021-06-07 | 2023-05-16 | 青海中钛青锻装备制造有限公司 | Lubrication device for extruded pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1365510A (en) * | 1972-04-12 | 1974-09-04 | Chesterfield Ltd T I | Manufacture of metal tubes |
| JPH09192724A (en) * | 1996-01-08 | 1997-07-29 | Sumitomo Metal Ind Ltd | Manufacture of seamless steel tube by hot extrusion |
| JPH10263683A (en) * | 1997-03-25 | 1998-10-06 | Sanyo Special Steel Co Ltd | Method for preventing scattering of lubricating face glass for hot extrusion, and lubricating face glass used therefor |
| CN201120418Y (en) * | 2007-09-25 | 2008-09-24 | 浙江久立特材科技股份有限公司 | Hot extrusion steel tube blank trail pad |
| CN102316999A (en) * | 2009-02-13 | 2012-01-11 | 住友金属工业株式会社 | Method for producing seamless pipe |
| CN203221077U (en) * | 2012-12-25 | 2013-10-02 | 包进平 | Glass lubricating pad capable of reducing extrusion force for thermal extrusion |
-
2013
- 2013-12-26 CN CN201310732693.9A patent/CN103722038B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1365510A (en) * | 1972-04-12 | 1974-09-04 | Chesterfield Ltd T I | Manufacture of metal tubes |
| JPH09192724A (en) * | 1996-01-08 | 1997-07-29 | Sumitomo Metal Ind Ltd | Manufacture of seamless steel tube by hot extrusion |
| JPH10263683A (en) * | 1997-03-25 | 1998-10-06 | Sanyo Special Steel Co Ltd | Method for preventing scattering of lubricating face glass for hot extrusion, and lubricating face glass used therefor |
| CN201120418Y (en) * | 2007-09-25 | 2008-09-24 | 浙江久立特材科技股份有限公司 | Hot extrusion steel tube blank trail pad |
| CN102316999A (en) * | 2009-02-13 | 2012-01-11 | 住友金属工业株式会社 | Method for producing seamless pipe |
| CN203221077U (en) * | 2012-12-25 | 2013-10-02 | 包进平 | Glass lubricating pad capable of reducing extrusion force for thermal extrusion |
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|---|---|
| CN103722038A (en) | 2014-04-16 |
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Effective date of registration: 20200514 Address after: 200940 room 1277, building 216, 1269 Shuishui Road, Baoshan District, Shanghai Patentee after: Baowu Special Metallurgy Co., Ltd Address before: 200940 No. 1269, Fisheries Road, Shanghai, Baoshan District Patentee before: BAOSTEEL SPECIAL STEEL Co.,Ltd. |
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