CN101298084B - Technique for processing D type copper pipe with unequal-radius wall thickness or equal-radius wall thickness - Google Patents
Technique for processing D type copper pipe with unequal-radius wall thickness or equal-radius wall thickness Download PDFInfo
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Abstract
The invention discloses a technique for processing a D-shaped copper pipe with unequal-diameter wall thickness or equal-diameter wall thickness, which pertains to the nonferrous metal processing technical field. Besides the common techniques for copper processing, the technique of the invention also comprises three processing techniques including pressing-rolling, modeling-drawing and truing, wherein, the speed of the pressing is controlled in a range from 20 to 45 mm/s and the general working rate of the pressing is controlled between 90 percent and 97 percent; the general working rate of the rolling is controlled in a range from 50 to 80 percent and the stretch rate is controlled in a range from 10 to 30 percent. The D-shaped copper pipe with unequal-diameter wall thickness or equal-diameter wall thickness processed by the technique of the invention can work as a conducting bus in a high-voltage switch cabinet, compared with the ordinary copper bus, the conducting bus has requirements on the conductivity of the materials as-always and furthermore, stricter requirements on the particularity of shape and the common difference of the materials.
Description
Technical field
The invention belongs to technical field of nonferrous metal processing, refer more particularly to a kind of do not wait radius wall thickness or etc. the processing technology of radius wall thickness D type copper pipe.
Background technology
The purposes of copper material in electric power, communications industry is very widely, common flat raft type copper busbar is saturated in low-end market, but the main dependence on import of copper material that the power industry high-end market is required, its middle section is similar to the bus material of D type pipe as conduction usefulness in the high-tension switch cabinet, be mainly used in large-scale power transmission and transforming equipment, every technical requirement strictness, and because D type pipe belongs to incomplete symmetric form special section tubular product, the production difficulty is big, all relies on from external import.
D type copper pipe is used for high voltage power transmission and transforming, advantages such as high-voltage fence has trans-regional, big capacity, remote, low-loss transmission of electricity.Therefore D type Application of Copper can be saved the circuit corridor, and the price of convey unit capacity is reduced, and has also reduced the conveying cost simultaneously, and this is very significant under the situation of present China's energy anxiety.
Summary of the invention
In order to address the above problem, the invention provides a kind of do not wait radius wall thickness or etc. the processing technology of radius wall thickness D type copper pipe, this processing technology is except copper is processed common processing technology, mainly three operations in the whole footpath of extruding-roll forming-stretching are innovated, processed do not wait radius wall thickness or etc. radius wall thickness D type copper pipe can be used as in the high-tension switch cabinet bus of conduction usefulness, compare with general copper busbar, except the conductance to material had requirement as before, the particularity of its shape and tolerance had stricter requirement.
For achieving the above object, the present invention adopts following technical scheme:
Described do not wait radius wall thickness or etc. the processing technology of radius wall thickness D type copper pipe, except copper is processed common processing technology, it is characterized in that extruding---roll forming---the whole footpath three road processing technologys that stretch, this wherein:
I, extruding
This operation is processed into circular pipe blank with the filled circles ingot casting, adopts hydraulic press and supporting extrusion die and pecker that the ingot blank that heats is carried out the circular pipe blank extruding, and extrusion speed is controlled at 20～45mm/s, pushes total working modulus and is controlled between the 90-97%;
Earlier the filled circles ingot casting that heats is put in the circular recipient during extruding and---puts the dummy block of an annular in the back of filled circles ingot casting and---fill extruding---perforation---extruding, make extrusion axis push away dummy block and ingot casting travels forward, force metal to pass " annulus " that extrusion die orifice and pecker form and become circular pipe blank;
II, roll forming
This operation with circular pipe blank be rolled into do not wait radius wall thickness or etc. the D type pipe of radius wall thickness, rolling total working modulus is controlled at 50-80%;
Earlier D core rod is penetrated into the inside of circular pipe blank when rolling, make D core rod and D type pass be in the tram of design, circular pipe blank progressively is fed in the D type pass of doing the cycle back and forth movement again and is rolled, rolling cycle is: send---just rolling---to and return and to roll, rolling feed is 2～8mm, and rolling working modulus is equivalent to the summation of stretch process rate more than three times;
III, the whole footpath of stretching
This operation will not wait radius wall thickness or etc. the rolling D type pipe of the radius wall thickness D type copper pipe that whole footpath becomes to adhere to specification that stretches, carry out in the sky mode of drawing when stretching whole footpath:
I, branch passage stretch
Earlier forcing to remove outer " ears or side handles of a utensil " of D type pipe with gang tool or slicing mould is stretchings that strip off the skin of first road, put in order directly stretching again;
Ii, combined type stretch
Gang tool, slicing mould, whole footpath mould are inserted in the D type pipe system head one-off drawing in order to be finished;
No matter divide passage to stretch or the combined type stretching, its total extensibility is controlled at 10-30%;
Described do not wait radius wall thickness or etc. the processing technology of radius wall thickness D type copper pipe, used gang tool was the corresponding site in the die holder left and right sides when it stretched, be equipped with along with tensile axis to the adjustable scraper of vertical direction.
Described do not wait radius wall thickness or etc. the processing technology of radius wall thickness D type copper pipe, used slicing mould profile be a circle when it stretched, stretching working position shape approximation is the D type, is provided with cutting edge with D type pipe " ears or side handles of a utensil " corresponding section, position.
Described do not wait radius wall thickness or etc. the processing technology of radius wall thickness D type copper pipe, used whole footpath die topography be a circle when it stretched, the stretching working position is shaped as the D type.
Because adopt aforesaid technical scheme, the present invention has following superiority:
1, the invention solves the every technical requirement strictness of China's present D type copper pipe, the production difficulty is big, all relies on the technical problem from external import.
2, adopt the D type copper pipe surfaces externally and internally of the whole footpath of extruding-roll forming of the present invention-stretching technology made processing smooth, cleaning, no cracking, peeling, be mingled with, defective such as gross distortion.
3, adopt technology of the present invention can process D type copper pipes such as red copper, copper-nickel alloy, composition metal.
Description of drawings
Fig. 1 waits radius wall thickness D type copper pipe shape of product schematic diagram.
Fig. 2 does not wait radius wall thickness D type copper pipe product shaping shape schematic diagram.
The specific embodiment
Among Fig. 1,2, work as S
Arc=S
FlatThe D type copper pipe of radius wall thickness such as Shi Shi is worked as S
Arc≠ S
FlatThe time be the D type copper pipe that does not wait radius wall thickness.In conjunction with the embodiments processing technology of the present invention is further elaborated.
Embodiment 1:
Processing and fabricating 92.3 ± 0.5 * 38 ± 0.5 * 8 ± 0.5 (flat limit) * 5 ± 0.2 (arc limit) mm does not wait radius wall thickness D type copper tube, and its processing technology is as follows:
Founding: adopt smelting furnace to carry out melting and casting and become red copper billet base.
Heating: adopt heating furnace heating ingot blank.
Extruding: adopt hydraulic press and supporting extrusion die and pecker that the ingot blank that heats is pushed, solid round ingot casting is squeezed into circular pipe blank, extrusion speed: 20～45mm/s pushes total working modulus and is controlled between the 90-97%, adopts lubricated and cooling in the extrusion process simultaneously.
Earlier the filled circles ingot casting that heats is put in the circular recipient during extruding and---puts the dummy block of an annular in the back of filled circles ingot casting and---fill extruding---perforation---extruding, make extrusion axis push away dummy block and ingot casting travels forward, force metal to pass " annulus " that extrusion die orifice and pecker form and become circular pipe blank;
Finishing: adopt sawing device that circular pipe blank is carried out sawing end to end.
Pickling: the circular pipe blank after adopting pickler to finishing carries out pickling, sulfuric acid concentration in the solution: 20-25%, pickling time: 15-30/min.
Check: this operation is a middle inspection, is the circular pipe blank after the pickling to be carried out size and geometry and surface quality check, and the cosmetic issue of checking out is repaired.
Roll forming: adopt two roller cold-rolling pilger mills rolling, with circular pipe blank roll forming D type pipe, rolling total working modulus is 50-80%.
Earlier D core rod is penetrated into the inside of circular pipe blank when rolling, make D core rod and D type pass be in the tram of design, circular pipe blank progressively is fed in the D type pass of doing the cycle back and forth movement again and is rolled, rolling cycle is: send---just rolling---to and return and to roll, rolling feed is 2～8mm.
Check: this operation is a middle inspection, is the D type pipe after rolling to be carried out size and geometry and surface quality check, and the cosmetic issue of checking out is repaired.
System head: adopt a system machine to D type pipe system head, system head length degree: 130-150mm.
Stretch: adopt stretching-machine to carry out in the sky mode of drawing when stretching, forcing to remove outer " ears or side handles of a utensil " of D type pipe with gang tool or slicing mould earlier is stretchings that strip off the skin of first road, put in order the footpath stretching again, and always extensibility is controlled at 10-30%.
Aligning: adopt the stretcher leveling mode on straightener, elongated article to be carried out stretcher leveling.
Crop: the goods after adopting sawing machine to aligning carry out crop.
Clean: adopt cleaning equipment to carry out high pressure water washing cutting excessive goods.
Finishing: the goods after cleaning are carried out finishing once more, according to the contract require to cut scale, cleaning surfaces externally and internally.
Check: this operation is a finished product inspection, and the goods after the finishing are according to the contract required to check.
Warehouse-in:, according to the contract require to pack warehouse-in to through the qualified D type pipe of finished product inspection.Embodiment 2:
Processing and fabricating 92.3 ± 0.5 * 38 ± 0.5 * 12 ± 0.5mm (Ping Bian and arc limit) etc. radius wall thickness D type copper tube, its technology is as follows:
Founding: adopt smelting furnace to carry out melting and casting and become red copper billet base.
Heating: adopt heating furnace heating ingot blank.
Extruding: adopt hydraulic press and supporting extrusion die and pecker that the ingot blank that heats is pushed, solid round ingot casting is squeezed into circular pipe blank.Extrusion speed: 30～45mm/s pushes total working modulus and is controlled between the 90-97%, adopts lubricated and cooling in the extrusion process simultaneously.
Earlier the filled circles ingot casting that heats is put in the circular recipient during extruding and---puts the dummy block of an annular in the back of filled circles ingot casting and---fill extruding---perforation---extruding, make extrusion axis push away dummy block and ingot casting travels forward, force metal to pass " annulus " that extrusion die orifice and pecker form and become circular pipe blank;
Finishing: adopt sawing device that circular pipe blank is carried out sawing end to end.
Pickling: the circular pipe blank after adopting pickler to finishing carries out pickling, sulfuric acid concentration in the solution: 20-25%, pickling time: 15-30/min.
Check: this operation is a middle inspection, is the circular pipe blank after the pickling to be carried out size and geometry and surface quality check, and the cosmetic issue of checking out is repaired.
Roll forming: adopt two roller cold-rolling pilger mills rolling, with circular pipe blank roll forming D type pipe, rolling total working modulus is 50-90%.
Earlier D core rod is penetrated into the inside of circular pipe blank when rolling, make D core rod and D type pass be in the tram of design, circular pipe blank progressively is fed in the D type pass of doing the cycle back and forth movement again and is rolled, rolling cycle is: send---just rolling---to and return and to roll, rolling feed is 2～8mm.
Check: this operation is a middle inspection, is the D type pipe after rolling to be carried out size and geometry and surface quality check, and the cosmetic issue of checking out is repaired.
System head: adopt a system machine to D type pipe system head, system head length degree: 130mm-200mm.
Whole footpath stretches: adopt stretching-machine to carry out in the sky mode of drawing when stretching, gang tool, slicing mould, whole footpath mould are inserted in the D type pipe system head one-off drawing in order finish, extensibility is controlled at 10-30%;
Aligning: adopt the stretcher leveling mode on straightener, elongated article to be carried out stretcher leveling.
Crop: the goods after adopting sawing machine to aligning carry out crop.
Clean: adopt cleaning equipment to carry out high pressure water washing cutting excessive goods.
Finishing: the goods after cleaning are carried out finishing once more, according to the contract require to cut scale, cleaning surfaces externally and internally.
Check: this operation is a finished product inspection, and the goods after the finishing are according to the contract required to check.
Warehouse-in:, according to the contract require to pack warehouse-in to through the qualified D type pipe of finished product inspection.
In above-mentioned two embodiment:
Described gang tool is the corresponding site in the die holder left and right sides, be equipped with along with tensile axis to the adjustable scraper of vertical direction.
Described slicing mould profile is circular, and stretching working position shape approximation is the D type, is provided with cutting edge with D type pipe " ears or side handles of a utensil " corresponding section, position.
Described whole footpath die topography is circular, and the stretching working position is shaped as the D type.
Do not wait the D type copper pipe of wall thickness for two bights, Ping Bian and arc limit, by the pipe roll forming of the basic symmetry of wall thickness, up and down mobile of metal is imbalance very, so two-part lengthening coefficient is basic identical up and down when rolling.And about metal balance as long as with the center line of symmetry axis as pass.
As the bus material of conduction usefulness in the high-tension switch cabinet, D type copper pipe is exactly the copper pipe of sectional area for approximate " D " type.The requirement that is used for the D type copper busbar of high-tension switch gear is compared with general copper busbar, and except the conductance to material had requirement as before, its characteristics were the strict demand of the particularity and the tolerance of shape:
1, physics requires: material purity: Cu+Ag 〉=99.95%, electrical conductivity: 〉=56MS/m (20 ℃).
2, mechanical performance: tensile strength: 300～340N/mm2, Bu Shi intensity: HB (10) 81.6～107.1.
3, size:
3.1. arc limit wall thickness (S
Arc) and flat limit wall thickness (S
Flat):
3.1.1.S
Arc± A, S
ArcFor 3-10mm, A are ± 0.1-± 1.0mm;
3.1.2.S
Flat± E, S
FlatBe 5-15mm, E is ± 0.2-± 1.0mm;
3.1.3. Δ S=S
Flat-S
Arc, Δ S is 0-5mm;
3.2.R and r angle and radian 1 requirement:
3.2.1. radian (1)=100～30mm;
3.2.2. bull nose (R)=12～4mm;
3.2.3. filleted corner (r)=10～2mm;
3.3. shape requirement: B ± b * H ± h
3.3.1.B＝130～50mm，b＝±0.3～±0.8mm；
3.3.2.H＝60～20mm，h＝±0.3～±0.8mm。
4, linearity: ≯ 3mm/m satisfies linearity ≯ 0.15mm/50mm simultaneously.
5, surface quality: surfaces externally and internally should be smooth, cleaning, cracking, peeling can not be arranged, is mingled with, gross distortion etc.
Claims (4)
- One kind do not wait radius wall thickness or etc. the processing technology of radius wall thickness D type copper pipe, except copper is processed common processing technology, it is characterized in that: extruding---roll forming---the whole footpath three road processing technologys that stretch, this wherein:I, extrudingThis operation is processed into circular pipe blank with the filled circles ingot casting, adopts hydraulic press and supporting extrusion die and pecker that the ingot blank that heats is carried out the circular pipe blank extruding, and extrusion speed is controlled at 20～45mm/s, pushes total working modulus and is controlled between the 90-97%;Earlier the filled circles ingot casting that heats is put in the circular recipient during extruding and---puts the dummy block of an annular in the back of filled circles ingot casting and---fill extruding---perforation---extruding, make extrusion axis push away dummy block and ingot casting travels forward, force metal to pass " annulus " that extrusion die orifice and pecker form and become circular pipe blank;II, roll formingThis operation with circular pipe blank be rolled into do not wait radius wall thickness or etc. the D type pipe of radius wall thickness, rolling total working modulus is controlled at 50-80%;Earlier D core rod is penetrated into the inside of circular pipe blank when rolling, make D core rod and D type pass be in the tram of design, circular pipe blank progressively is fed in the D type pass of doing the cycle back and forth movement again and is rolled, rolling cycle is: send---just rolling---to and return and to roll, rolling feed is 2～8mm, and rolling working modulus is equivalent to the summation of stretch process rate more than three times;III, the whole footpath of stretchingThis operation will not wait radius wall thickness or etc. the rolling D type pipe of the radius wall thickness D type copper pipe that whole footpath becomes to adhere to specification that stretches, carry out in the sky mode of drawing when stretching whole footpath:Wherein, the branch passage is stretched as: earlier forcing to remove outer " ears or side handles of a utensil " of D type pipe with gang tool or slicing mould is stretchings that strip off the skin of first road, put in order directly stretching again; Or adopting combined type to stretch, described combined type is stretched as: gang tool, slicing mould, whole footpath mould are inserted in the D type pipe system head one-off drawing in order finish; No matter divide passage to stretch or the combined type stretching, its total extensibility is controlled at 10-30%.
- 2. according to claim 1 do not wait radius wall thickness or etc. the processing technology of radius wall thickness D type copper pipe, it is characterized in that: used gang tool was the corresponding site in the die holder left and right sides when it stretched, be equipped with along with tensile axis to the adjustable scraper of vertical direction.
- 3. according to claim 1 do not wait radius wall thickness or etc. the processing technology of radius wall thickness D type copper pipe, it is characterized in that: slicing mould profile used when it stretches is for circular, stretching working position shape approximation is the D type, is provided with cutting edge with D type pipe " ears or side handles of a utensil " corresponding section, position.
- 4. according to claim 1 do not wait radius wall thickness or etc. the processing technology of radius wall thickness D type copper pipe, it is characterized in that: whole footpath die topography used when it stretches is for circular, the stretching working position is shaped as the D type.
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| CN101623717B (en) * | 2009-08-10 | 2011-03-23 | 上虞市宇星铜材有限公司 | Manufacture method of D-shaped copper tube and forming device thereof |
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| CN105171357A (en) * | 2015-10-19 | 2015-12-23 | 河北欧通有色金属制品有限公司 | Machining method of D-shaped copper pipes and D-shaped copper pipes |
| CN105149889A (en) * | 2015-10-19 | 2015-12-16 | 河北欧通有色金属制品有限公司 | D-type copper tube machining method and D-type copper tubes |
| CN106216431B (en) * | 2016-08-05 | 2018-03-23 | 东莞市赤诚五金制品有限公司 | A kind of production technology of D types copper pipe |
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| CN107953084B (en) * | 2017-11-24 | 2019-08-13 | 韶关市欧莱高新材料有限公司 | A kind of manufacturing method of rafifinal rotary target material |
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Effective date of registration: 20170824 Address after: 471039 No. 50, Jianxi, Luoyang District, Henan, Jianshe Road Patentee after: China Aluminum Luoyang Copper Processing Co., Ltd. Address before: 471039 No. 50, Jianxi, Luoyang District, Henan, Jianshe Road Patentee before: Zhonglu Luoyang Copper Industry Co., Ltd. |
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