CN102581060B - Method for processing copper tube having circular inside and quadrate outside - Google Patents
Method for processing copper tube having circular inside and quadrate outside Download PDFInfo
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- CN102581060B CN102581060B CN201210038004.XA CN201210038004A CN102581060B CN 102581060 B CN102581060 B CN 102581060B CN 201210038004 A CN201210038004 A CN 201210038004A CN 102581060 B CN102581060 B CN 102581060B
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Abstract
The invention discloses a method for processing a copper rube having a circular inside and a quadrate outside. The method comprises the steps of: 1) adopting high-pure cathode copper as a raw material and vacuum up-drawing in a clutch type way and continuously casting an oxygen-free copper rod by using a dragger group; 2) processing the oxygen-free copper rod from step 1) to form a copper tube blank having the circular inside and the quadrate outside by a continuous extruding machine group; 3) stretching the copper tube blank having the circular inside and the quadrate outside formed in step 2) by a high-precision stretcher; 4) annealing the stretched copper tube blank having the circular inside and the quadrate outside obtained in step 3) by bright annealing equipment; and 5) inspecting and packing the annealed copper tube blank having the circular inside and the quadrate outside obtained in step 4). The method provided by the invention has the characteristics of being low in energy consumption, high in yield, high in production efficiency, and long in the product length. In the method, the sum of content of copper and silver is not less than 99.99%; the content of oxygen is not more than 5ppm, and the electric conductivity is not less than 101% IACS (International Annealed Copper Standard).
Description
Technical field
The present invention relates to a kind of inner circle foreign side copper pipe processing method, belong to technical field of nonferrous metal processing.
Background technology
Inner circle foreign side copper pipe has the features such as conductive section is large, the unit interval is many by cooling medium consumption, perfect heat-dissipating, the critical material by atomic energy industry and electric machine industry for the manufacture of various motors and accelerator.
General one of the following five kinds of traditional handicraft methods that adopt of inner circle foreign side copper pipe process:
A: ingot casting-extrusion tube blank-rolling-intermediate annealing-stretching-annealing;
B: ingot casting-extrusion tube blank-stretching-annealing;
C: ingot casting-perforation-rolling (stretching)-annealing;
D: cast tube-rolling-intermediate annealing-stretching-annealing;
E: cast tube-stretching-annealing.
There is the shortcomings such as scale of investment is large, lumber recovery is low, product length is limited, production efficiency is low, energy consumption is large in traditional inner circle foreign side copper tube production process.
Summary of the invention
The object of the present invention is to provide a kind of inner circle foreign side copper pipe processing method.The present invention has that energy consumption is low, lumber recovery is high, production efficiency is high, the feature of product big-length, and Cu+Ag >=99.99%, O≤5ppm, conductance >=101%IACS.
In order to reach above-mentioned purpose, solution of the present invention is:
An inner circle foreign side copper pipe processing method, comprises the steps: 1) take Cu-CATH-1 as prepared using traction unit disengaging type vacuum continuous up-casting oxygen-free copper bar; 2) adopt continuously extruded unit to be processed to form inner circle foreign side copper tube billet to the oxygen-free copper bar in step 1); 3) by high accuracy stretching-machine to step 2) the inner circle foreign side copper tube billet that forms stretches; 4) the inner circle foreign side copper pipe after step 3) being stretched with the online bright annealing equipment of protective atmosphere is annealed; 5) the inner circle foreign side copper pipe after step 4) annealing is tested, packing.
In described step 1), Cu-CATH-1 adopts a tough cathode of national Specification, and copper content is not less than 99.99%.
Cu-CATH-1 raw material in described step 1) is fusing at 1150 ℃ ± 10 ℃ temperature, insulation first, under vacuum state, adopt copper liquid refining techniques, utilize online degasification device for deoxidizing, in copper liquid, be filled with inert gas, and utilize agitating device, reach after degasification, deoxidation, high-purity effect and could use in traction unit disengaging type vacuum and draw oxygen-free copper bar, then oxygen-free copper bar enters take-up; Wherein draw power traction bar speed 500-1500mm/min, oxygen-free copper bar diameter Ф 20 mm～30mm, crystallizer hydraulic pressure 0.2～0.4MPa, 35 ℃～50 ℃ of crystallizer leaving water temperatures, oxygen-free copper bar Cu+Ag >=99.99%, O≤5ppm.
Vacuum when described vacuum state is realized fusing by adopting wooden carbon and graphite phosphorus sheet to cover.
Described inert gas adopts argon gas or nitrogen, adopts graphite shaft and rotor as agitating device, and argon gas or nitrogen are pressed in copper liquid and are dispersed as micro-bubble, and it is dispersed in copper liquid; Source of the gas outlet pressure 0.5～1MPa, the 5Nm of flow 0.5～1.
3/ h.
Described step 2) after Ф 20 mm～30mm oxygen-free copper bar being aligned in, send in the extruding race of continuously extruded unit, squeegee roller rotating speed is 4～7r/min, oxygen-free copper bar is through compact wheel compacting, boots seat compaction pressure 30～40MPa, under the effect of frictional force, be continuously fed into extrusion chamber, blank along circular motion, through fricting shearing deformed area, Upsetting district, adhesioin zone, right-angle bending crush zone, finally enters cavity and extrudes inner circle foreign side copper tube billet by mould before cavity material blocking block; Blank extruded velocity: 5～10m/min; In extrusion process, the temperature of copper reaches 500 ℃～750 ℃, and cavity internal pressure reaches 1000～1200MPa; Adopt vacuum water device for cooling, make blank after high temperature is extruded, enter vacuum tube cooling, dry up to 20 ℃～30 ℃, batch.In whole deformation process, cut off and the contacting of oxygen, avoided oxygen uptake, guaranteed inner circle foreign side copper pipe low oxygen content, improved electric conductivity.
The drawing coefficient λ of high accuracy stretching-machine in described step 3): 1.5～1.7.
In described step 4), annealing temperature is 300 ℃～400 ℃, annealing time 2～6h.
Beneficial effect of the present invention is: 1. low energy consumption, short flow process; Adopt continuously extruded technology production inner circle foreign side copper pipe, compare the operation of having omitted ingot casting heating with traditional production technology, reduced energy consumption, shortened production procedure, save more than 50% energy.2. production efficiency is high, lumber recovery is high; Adopt continuously extruded technology production inner circle foreign side copper pipe, can reach serialization and produce, Mei Juan inner circle foreign side copper pipe can reach more than 3 tons, realizes big-length and produces.Continuously extruded technology production inner circle foreign side copper pipe, has avoided every copper pipe in traditional processing technology all to need to carry out crop, back-end crop, and the lumber recovery of product reaches more than 90%.3. product quality is excellent, and the purity of product is high, oxygen content is low and conductance is high, and surface quality is excellent.Cu+Ag >=99.99%, O≤5ppm, conductance >=101%IACS.
Accompanying drawing explanation
Fig. 1 is the specification figure of the inner circle foreign side copper tube billet of embodiment of the present invention production;
Fig. 2 is the specification figure of the inner circle foreign side copper pipe of embodiment of the present invention production.
The specific embodiment
Embodiment 1
A kind of inner circle foreign side copper pipe processing method of the present embodiment, comprise the steps: 1) with a tough cathode of national Specification, it is that raw material first melts at 1150 ℃ ± 10 ℃ temperature that copper content is not less than 99.99% Cu-CATH-1, insulation, vacuum state while realizing fusing by adopting wooden carbon and graphite phosphorus sheet to cover, adopt copper liquid refining techniques, utilize online degasification device for deoxidizing, in copper liquid, be filled with inert gas, inert gas adopts argon gas or nitrogen, adopt graphite shaft and rotor as agitating device, argon gas or nitrogen are pressed in copper liquid and are dispersed as micro-bubble, it is dispersed in copper liquid, source of the gas outlet pressure 0.5～1MPa, the 5Nm of flow 0.5～1.
3/ n.Reach after degasification, deoxidation, high-purity effect and could use in traction unit disengaging type vacuum and draw oxygen-free copper bar, then oxygen-free copper bar enters take-up; Wherein draw power traction bar speed 500-1500mm/min, oxygen-free copper bar diameter Ф 20 mm～30mm, crystallizer hydraulic pressure 0.2～0.4MPa, 35 ℃～50 ℃ of crystallizer leaving water temperatures, copper content Cu+Ag >=99.99%, O≤5ppm.
2) send in the extruding race of the continuously extruded unit of TJL400 after the Ф 20 mm～30mm oxygen-free copper bar in step 1) is aligned, as shown in Figure 1, specification is 39.8 * 36.8 * Φ, 22.5 * R3mm to the present embodiment production inner circle foreign side copper tube billet.Squeegee roller rotating speed is 4～7r/min, oxygen-free copper bar is through compact wheel compacting, boots seat compaction pressure 30～40MPa, under the effect of frictional force, be continuously fed into extrusion chamber, blank before cavity material blocking block along circular motion, through fricting shearing deformed area, Upsetting district, adhesioin zone, right-angle bending crush zone, finally enter cavity and extrude inner circle foreign side copper tube billet by mould; Blank extruded velocity: 5～10m/min; In extrusion process, the temperature of copper reaches 500 ℃～750 ℃, and cavity internal pressure reaches 1000～1200MPa; Adopt vacuum water device for cooling, make blank after high temperature is extruded, enter vacuum tube cooling, dry up to 20 ℃～30 ℃, batch.In whole deformation process, cut off and the contacting of oxygen, avoided oxygen uptake, guaranteed inner circle foreign side copper pipe low oxygen content, improved electric conductivity.
3) by high accuracy stretching-machine to step 2) the inner circle foreign side copper tube billet that forms stretches; Its drawing coefficient λ is 1.68, and the finished size after stretching is 25.4 * 25.4 * Φ, 12.5 * R3mm, as shown in Figure 2.
4) the inner circle foreign side copper pipe after step 3) being stretched with the online bright annealing equipment of protective atmosphere is annealed, 300 ℃ * 6h of annealing process.
5) the inner circle foreign side copper pipe after step 4) annealing is tested, the inner circle foreign side copper pipe being up to the standards is packed.
The inner circle foreign side copper pipe technique that the present embodiment is produced has following features: 1. low energy consumption, short flow process; Adopt continuously extruded technology production inner circle foreign side copper pipe, compare the operation of having omitted ingot casting heating with traditional production technology, reduced energy consumption, shortened production procedure, save more than 50% energy.2. production efficiency is high, lumber recovery is high; Adopt continuously extruded technology production inner circle foreign side copper pipe, can reach serialization and produce, Mei Juan inner circle foreign side copper pipe can reach more than 3 tons, realizes big-length and produces.Continuously extruded technology production inner circle foreign side copper pipe, has avoided every copper pipe in traditional processing technology all to need to carry out crop, back-end crop, and the lumber recovery of product reaches more than 90%.3. product quality is excellent, and the purity of product is high, oxygen content is low and conductance is high, and surface quality is excellent.Cu+Ag >=99.97%, O≤5ppm, conductance >=101%IACS.
Claims (4)
1.Yi Zhong inner circle foreign side copper pipe processing method, is characterized in that comprising the steps: 1) take Cu-CATH-1 as prepared using traction unit disengaging type vacuum continuous up-casting oxygen-free copper bar; 2) adopt continuously extruded unit to be processed to form inner circle foreign side copper tube billet to the oxygen-free copper bar in step 1); 3) by high accuracy stretching-machine to step 2) the inner circle foreign side copper tube billet that forms stretches; 4) the inner circle foreign side copper pipe after step 3) being stretched with the online bright annealing equipment of protective atmosphere is annealed; 5) the inner circle foreign side copper pipe after step 4) annealing is tested, packing; In described step 1), Cu-CATH-1 adopts a tough cathode of national Specification, and copper content is not less than 99.99%; Described step 2) after Ф 20mm～30mm oxygen-free copper bar being aligned in, send in the extruding race of continuously extruded unit, squeegee roller rotating speed is 4～7r/min, oxygen-free copper bar is through compact wheel compacting, boots seat compaction pressure 30～40MPa, under the effect of frictional force, be continuously fed into extrusion chamber, blank along circular motion, through fricting shearing deformed area, Upsetting district, adhesioin zone, right-angle bending crush zone, finally enters cavity and extrudes inner circle foreign side copper tube billet by mould before cavity material blocking block; Blank extruded velocity: 5～10m/min; In extrusion process, the temperature of copper reaches 500 ℃～750 ℃, and cavity internal pressure reaches 1000～1200MPa; Adopt vacuum water device for cooling, make blank after high temperature is extruded, enter vacuum tube cooling, dry up to 20 ℃～30 ℃, batch; The drawing coefficient λ of high accuracy stretching-machine in described step 3): 1.5～1.7; In described step 4), annealing temperature is 300 ℃～400 ℃, annealing time 2～6h.
2. a kind of inner circle as claimed in claim 1 foreign side copper pipe processing method, it is characterized in that: the Cu-CATH-1 raw material in described step 1) is fusing at 1150 ℃ ± 10 ℃ temperature, insulation first, under vacuum state, adopt copper liquid refining techniques, utilize online degasification device for deoxidizing, in copper liquid, be filled with inert gas, and utilize agitating device, and reach after degasification, deoxidation, high-purity effect and could use in traction unit disengaging type vacuum and draw oxygen-free copper bar, then oxygen-free copper bar enters take-up; Wherein draw power traction bar speed 500-1500mm/min, oxygen-free copper bar diameter Ф 20mm～30mm, crystallizer hydraulic pressure 0.2～0.4MPa, 35 ℃～50 ℃ of crystallizer leaving water temperatures, oxygen-free copper bar Cu+Ag >=99.99%, O≤5ppm.
3. a kind of inner circle as claimed in claim 2 foreign side copper pipe processing method, is characterized in that: vacuum when described vacuum state is realized fusing by adopting wooden carbon and graphite phosphorus sheet to cover.
4. a kind of inner circle as claimed in claim 2 foreign side copper pipe processing method, it is characterized in that: described inert gas adopts argon gas or nitrogen, adopt graphite shaft and rotor as agitating device, argon gas or nitrogen are pressed in copper liquid and are dispersed as micro-bubble, it is dispersed in copper liquid; Source of the gas outlet pressure 0.5～1MPa, flow 0.5～1.5Nm
3/ h.
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| CN201210038004.XA CN102581060B (en) | 2012-02-20 | 2012-02-20 | Method for processing copper tube having circular inside and quadrate outside |
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| CN201210038004.XA CN102581060B (en) | 2012-02-20 | 2012-02-20 | Method for processing copper tube having circular inside and quadrate outside |
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| CN102581060B true CN102581060B (en) | 2014-03-19 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102886390B (en) * | 2012-10-25 | 2014-11-05 | 绍兴市力博电气有限公司 | Process for producing ultra-fine copper wire |
| CN104668888A (en) * | 2013-11-27 | 2015-06-03 | 厦门市海鼎盛科技有限公司 | Integrated tube shell manufacturing method |
| CN104070656A (en) * | 2014-05-21 | 2014-10-01 | 宁波名德建材有限公司 | Manufacture method of hot-melt type red copper composite tube |
| CN106269984A (en) * | 2015-06-12 | 2017-01-04 | 河北欧通有色金属制品有限公司 | The manufacture method of square-outside and round-inside copper pipe |
| CN106269985A (en) * | 2015-06-12 | 2017-01-04 | 河北欧通有色金属制品有限公司 | The manufacture method of oval copper pipe in foreign side |
| CN105463219B (en) * | 2015-11-23 | 2017-05-24 | 晋源电气集团股份有限公司 | High-performance oxygen-free copper rod and manufacturing method thereof |
| CN107971363A (en) * | 2017-12-01 | 2018-05-01 | 浙江力博实业股份有限公司 | The continuously extruded method for preparing high-purity high-conductivity copper bar of multi-pass |
| CN108465714A (en) * | 2018-03-28 | 2018-08-31 | 秦皇岛瀚丰长白结晶器有限责任公司 | Crystallizer copper pipe upsetting squeeze one-shot forming technique |
| CN109351802A (en) * | 2018-10-31 | 2019-02-19 | 河北欧通有色金属制品有限公司 | A kind of processing method of heavy wall oxygen-free copper copper pipe |
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| JPH09253736A (en) * | 1996-03-21 | 1997-09-30 | Nippon Light Metal Co Ltd | Bending method for extruded shape |
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2012
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