CN103567253B - The manufacture craft of major diameter copper pipe - Google Patents
The manufacture craft of major diameter copper pipe Download PDFInfo
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- CN103567253B CN103567253B CN201210251980.3A CN201210251980A CN103567253B CN 103567253 B CN103567253 B CN 103567253B CN 201210251980 A CN201210251980 A CN 201210251980A CN 103567253 B CN103567253 B CN 103567253B
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Abstract
The invention discloses a kind of manufacture craft of major diameter copper pipe, comprise the following steps: 1. forge and press: furnace temperature is elevated to 800 ~ 900 DEG C, and copper ingot is forged into copper rod, is then incubated 2 ~ 3 hours; 2. backward extrusion: by spacing for copper ingot external mold, carries out backward extrusion by internal mold to copper rod and forms the copper pipe bottom band, being cooled to normal temperature after then the copper pipe squeezed out being incubated 0.5 hour; When carrying out backward extrusion to internal mold and external mold electrical heating, to guarantee that internal mold and external mold temperature remain on 400 ~ 450 DEG C; 3. cold extrusion: copper pipe is elongated to the size required through cold extrusion, is incubated 3 ~ 4 hours.Process for making of the present invention is clear, by the isoparametric conservative control of temperature, particularly when backward extrusion by carrying out electrical heating to mould, to guarantee in the process of backward extrusion, copper rod hardness is moderate, there will not be cracking, thus ensure that success and the quality of manufacture.
Description
Technical field
The present invention relates to a kind of manufacture craft of crystallizer copper pipe, particularly a kind of manufacture craft of major diameter copper pipe.
Background technology
Casting process injects in crystallizer by molten steel, obtains the process of strand continuously, and it is the intermediate link connecting refining steel and rolled steel, is the important component part of STEELMAKING PRODUCTION.Crystallizer is the important component part of smeltery's conticaster, and crystallizer copper pipe is the vitals of crystallizer.Because high-temperature molten steel directly flows through crystallizer copper pipe, for making continuous casting work process stabilization, support equipment and operator safety again, just requires that crystallizer copper pipe has good high temperature resistant, wear-resistant and decay resistance.Along with the development of science and technology, the demand of major diameter (diameter of bore is more than or equal to the copper pipe of 1000 millimeters) copper pipe gets more and more, in the past major diameter copper pipe due to the heat absorption of large diameter copper rod many, backward extrusion punching required time is long, and past contact does not meet the requirement that backward extrusion terminates, and copper rod cools, hardness is very high, once carry out backward extrusion again, namely easily there is cracking, cause scrapping.
Summary of the invention
The object of the invention is the defect solving prior art existence, providing a kind of does not have particular/special requirement to production equipment, can produce the manufacture craft of high-quality major diameter copper pipe.
The technical scheme realizing the object of the invention is a kind of manufacture craft of major diameter copper pipe, comprises the following steps:
1. forge and press: furnace temperature is elevated to 800 ~ 900 DEG C, and copper ingot is forged into copper rod, is then incubated 2 ~ 3 hours;
2. backward extrusion: by spacing for copper ingot external mold, carries out backward extrusion by internal mold to copper rod and forms the copper pipe bottom band, being cooled to normal temperature after then the copper pipe squeezed out being incubated 0.5 hour; When carrying out backward extrusion to internal mold and external mold electrical heating, to guarantee that internal mold and external mold temperature remain on 400 ~ 450 DEG C,
3. cold extrusion: copper pipe is elongated to the size required through cold extrusion, is incubated 3 ~ 4 hours.
The concrete steps of the described the backward extrusion 2. in step are: first with diameter be 1000 millimeters internal mold copper rod is squeezed into the copper pipe that internal diameter is 1000 millimeters, then repeatedly chambering process is carried out, the internal mold that each diameter increases by 10 millimeters carries out reaming, until the inside and outside footpath of copper rod meets the requirements; Calculate required dimension of inner and outer diameters as requested when aforementioned extruding, reaming, and guarantee precision by the mode that correspondence changes inside and outside mould.
Described the cold extrusion 3. in step adopts repeatedly cold-stamped technique, and be specially: the monolateral wall thickness of copper pipe often reduces 7 ~ 8 millimeters, once, temperature is 580 ~ 620 DEG C in tempering, and is incubated 2 ~ 3 hours, till copper pipe wall thickness reaches requirement; Calculate required dimension of inner and outer diameters as requested during aforementioned each cold extrusion, and guarantee each cold-stamped precision by the mode that correspondence changes inside and outside mould.
After have employed technique scheme, the present invention has following useful effect: (1) process for making of the present invention is clear, by the isoparametric conservative control of temperature, particularly when backward extrusion by carrying out electrical heating to mould, to guarantee in the process of backward extrusion, copper rod hardness is moderate, there will not be cracking, thus ensure that success and the quality of manufacture.
(2) diameter of bore due to major diameter copper pipe is very large, if adopt common backward extrusion technology to carry out disposable extruding, likely can be long because of the time of required extruding, copper rod cooling is fast, cause easily occurring cracking, and be not easy control dynamics and speed ensures once to extrude to put in place, and the present invention is when carrying out backward extrusion, adopt preliminary extruding to add the form of repeatedly reaming, just can solve this problem.
(3) identical with aforesaid principle, the present invention also adopts the technique repeatedly extruded when carrying out cold extrusion, be also aided with heat preservation method simultaneously, has consolidated performance and the quality of major diameter copper pipe further.
Detailed description of the invention
The manufacture craft of a kind of major diameter copper pipe of the present embodiment, comprises the following steps:
1. forge and press: furnace temperature is elevated to 800 ~ 900 DEG C, and copper ingot is forged into copper rod, is then incubated 2 ~ 3 hours;
2. backward extrusion: by spacing for copper ingot external mold, carries out backward extrusion by internal mold to copper rod and forms the copper pipe bottom band, being cooled to normal temperature after then the copper pipe squeezed out being incubated 0.5 hour; When carrying out backward extrusion to internal mold and external mold electrical heating, to guarantee that internal mold and external mold temperature remain on 400 ~ 450 DEG C; Concrete steps are: first with diameter be 1000 millimeters internal mold copper rod is squeezed into the copper pipe that internal diameter is 1000 millimeters, then carry out repeatedly chambering process, carry out reaming, until the inside and outside footpath of copper rod meets the requirements with the internal mold that diameter increases by 10 millimeters at every turn; Calculate required dimension of inner and outer diameters as requested when aforementioned extruding, reaming, and guarantee precision by the mode that correspondence changes inside and outside mould.
3. cold extrusion: copper pipe is elongated to the size required through cold extrusion, is incubated 3 ~ 4 hours.Cold extrusion adopts repeatedly cold-stamped technique, is specially: the monolateral wall thickness of copper pipe often reduces 7 ~ 8 millimeters, and once, temperature is 580 ~ 620 DEG C, and is incubated 2 ~ 3 hours, till copper pipe wall thickness reaches requirement in tempering; Calculate required dimension of inner and outer diameters as requested during aforementioned each cold extrusion, and guarantee each cold-stamped precision by the mode that correspondence changes inside and outside mould.
For the major diameter copper pipe that model is 1000, so-called model is the major diameter copper pipe of 1000, refer to that internal diameter is roughly the copper pipe of 1000 millimeters, the concrete internal diameter size of the finished product that final production is determined is 1021 millimeters, wall thickness is 35 millimeters, external diameter is 1091 millimeters, during fabrication, diameter is selected to be the copper ingot of 380 millimeters, forging and stamping to diameter is 1065 millimeters, in backward extrusion step, first forming diameter of bore is 1000 millimeters, overall diameter is the copper pipe of 1080 millimeters, then by 2 reamings, the mode of each increase diameter of bore 10 millimeters, its endoporus is expanded to 1021 millimeters needed for cost, by repeatedly cold extrusion, final reduced outside diameter and wall thickness, make to reach requirement.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a manufacture craft for major diameter copper pipe, is characterized in that comprising the following steps:
1. forge and press: furnace temperature is elevated to 800 ~ 900 DEG C, and copper ingot is forged into copper rod, is then incubated 2 ~ 3 hours;
2. backward extrusion: by spacing for copper rod external mold, carries out backward extrusion by internal mold to copper rod and forms the copper pipe bottom band, being cooled to normal temperature after then the copper pipe squeezed out being incubated 0.5 hour; When carrying out backward extrusion to internal mold and external mold electrical heating, to guarantee that internal mold and external mold temperature remain on 400 ~ 450 DEG C;
3. cold extrusion: copper pipe is elongated to the size required through cold extrusion, is incubated 3 ~ 4 hours; The concrete steps of the described the backward extrusion 2. in step are: first with diameter be 1000 millimeters internal mold copper rod is squeezed into the copper pipe that internal diameter is 1000 millimeters, then repeatedly chambering process is carried out, the internal mold that each diameter increases by 10 millimeters carries out reaming, until the inside and outside footpath of copper rod meets the requirements; Calculate required dimension of inner and outer diameters as requested when aforementioned extruding, reaming, and guarantee precision by the mode that correspondence changes inside and outside mould.
2. the manufacture craft of major diameter copper pipe according to claim 1, is characterized in that:
Described the cold extrusion 3. in step adopts repeatedly cold-stamped technique, and be specially: the monolateral wall thickness of copper pipe often reduces 7 ~ 8 millimeters, once, temperature is 580 ~ 620 DEG C in tempering, and is incubated 2 ~ 3 hours, till copper pipe wall thickness reaches requirement; Calculate required dimension of inner and outer diameters as requested during aforementioned each cold extrusion, and guarantee each cold-stamped precision by the mode that correspondence changes inside and outside mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210251980.3A CN103567253B (en) | 2012-07-19 | 2012-07-19 | The manufacture craft of major diameter copper pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210251980.3A CN103567253B (en) | 2012-07-19 | 2012-07-19 | The manufacture craft of major diameter copper pipe |
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| Publication Number | Publication Date |
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| CN103567253A CN103567253A (en) | 2014-02-12 |
| CN103567253B true CN103567253B (en) | 2015-09-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104084446B (en) * | 2014-06-26 | 2016-03-02 | 梧州恒声电子科技有限公司 | A kind of production technology with the trombone slide series products of backward extrusion and stretching process |
| CN107240464B (en) * | 2017-05-09 | 2019-04-19 | 佳腾电业（赣州）有限公司 | A kind of production technology of the flat enamel covered wire of big flakiness ratio |
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| ES2651345T3 (en) * | 2005-12-22 | 2018-01-25 | Viega Technology Gmbh & Co. Kg | Low migration construction components made of a copper alloy for conduits that carry fluids or drinking water |
| CN100368106C (en) * | 2005-12-29 | 2008-02-13 | 大连冶金结晶器有限公司 | Adjustable mold employing reverse extrusion and draw forming for raw copper tube of mould, reverse extrusion and draw forming method thereof |
| CN100445624C (en) * | 2007-04-23 | 2008-12-24 | 中铝洛阳铜业有限公司 | Method for preparing large-diameter white copper pipe |
| EP2027947B1 (en) * | 2007-08-14 | 2011-04-06 | KME Italy S.p.A. | Method for the production of alloy pipes for heat exchangers using precipitation hardening through underwater extrusion |
| CN100482404C (en) * | 2007-09-20 | 2009-04-29 | 王仁辉 | Technique for processing tin bronze valve body and tube union |
| JP2009242837A (en) * | 2008-03-28 | 2009-10-22 | Kobelco & Materials Copper Tube Inc | Tool-wearing reduced copper alloy cast billet and copper alloy tube |
| CN101633011A (en) * | 2009-08-18 | 2010-01-27 | 太仓市金仓铜业有限公司 | Method for manufacturing bronze pipe |
| CN102240696A (en) * | 2011-05-18 | 2011-11-16 | 金川集团有限公司 | Method for preparing copper and copper alloy pipes |
| CN102492877B (en) * | 2011-12-31 | 2013-06-19 | 辽宁忠旺集团有限公司 | Extruding processing technology of aluminium alloy tubing with large diameter |
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