CN104148431A - Continuous extrusion device for extruding copper alloy - Google Patents
Continuous extrusion device for extruding copper alloy Download PDFInfo
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- CN104148431A CN104148431A CN201410311337.4A CN201410311337A CN104148431A CN 104148431 A CN104148431 A CN 104148431A CN 201410311337 A CN201410311337 A CN 201410311337A CN 104148431 A CN104148431 A CN 104148431A
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Abstract
The invention relates to a continuous extrusion technology and equipment for copper alloys. A continuous extrusion device for extruding the copper alloy comprises a cavity, wherein a mould is mounted in the cavity and is in contact with a supporting part; a flow promoting corner is arranged at the feeding end of the mould and a sizing belt is arranged at the discharging end of the mould; a terminal of the sizing belt leans against the mould and the end face of the supporting part; a groove is formed in the end face of the supporting part; a cooling nozzle is formed by the groove of the supporting part and the end face of the mould; the supporting part further comprises a cooling channel matched with the cooling nozzle; a cooling medium passes through the cooling channel and is sprayed out by the nozzle; and the end face of the sizing belt of the mould and a product begin to be cooled from a separated position of the extruded product and the sizing belt. According to a mould structure and a cooling method, a product surface white point problem and a mould sticking problem are solved and the product can be immediately cooled after the mould is released from a mould outlet; the re-crystallization time of the product is shortened and a fine crystal grain structure is obtained; and the tensile strength, the yield strength and the hardness of the product are improved.
Description
Technical field
The present invention relates to the continuously extruded technology of non-ferrous metal continuously extruded technology, especially copper alloy and equipment, for various non-ferrous metal section bars, wire rod, copper strap wire, copper bar, brass material and other nonferrous metal and alloy continuous extrusion production manufacture.
Background technology
Existing continuously extruded extruder, contain the low melting point elements such as zinc at extrusion brass etc. alloy time, due to the low-melting alloy fusing points such as zinc and boiling point lower, therefore when in the time that extruded product goes out mould, temperature is higher than the boiling point of low melting point element, this alloying element can overflow and condense in mould mouth with gas form, the size of mould mouth is diminished gradually, therefore cause the product surface fineness variation soon squeezing out, the product size squeezing out also diminishes gradually, this phenomenon is called " sticking to mould " in brass hot extrusion industry, sticking to mould is one of continuously extruded technical bottleneck of current brass.Another continuously extruded technical bottleneck of brass is that the product surface part squeezing out has zinc to separate out, and shows on product it is that product external surfaces has " white point ".The essential nature of white point be brass under extruding condition, blank temperature has exceeded the fusion temperature of zinc, makes not the fully zinc of alloying at high temperature melt, and is enriched to product surface, forms zinc point in part.Sticking to mould and white point make Continuous Extrusion Products size unstable, and product quality is defective, have therefore limited the application of continuously extruded technology at brass manufacture field.
Summary of the invention
The present invention, in order to solve the continuously extruded sticking to mould of brass and a white point difficult problem, provides a kind of continuous extrusion device that pushes copper alloy, is especially applicable to being applied to the continuously extruded of brass.The present invention has not only solved the product quality problem that traditional continuously extruded technology exists in the time that extrusion type is similar to the such copper alloy of brass, has also increased substantially the service life of mould, reduces production costs, and has significant economic benefit and social benefit.
The technical scheme that the present invention adopted is for achieving the above object: a kind of continuous extrusion device that pushes copper alloy, relate to cavity, mould is installed in cavity, mould contacts with support part, the feed end of mould is with short stream angle, the discharge end of mould is with calibrating strap, the terminal of calibrating strap is on the end face of mould and support part, on support part end face, offer groove, the groove of support part and die face form cooling jet, support part also includes a cooling duct cooperatively interacting with cooling jet, cooling medium penetrates by nozzle after via cooling duct, begin to cool down mould calibrating strap end face and product at extruded product and calibrating strap separation point position.
Described support part adopts single cavity lid, and groove is opened on the cavity lid end face contacting with mould; Or cavity lid and supporting pad combination, supporting pad end face contacts with mould, and groove is on the supporting pad end face contacting with mould.
Described mould is made up of core rod and die coat interference assembling.
The angle beta value at described short stream angle is 20 ° to 60 °; Preferably 30 °.
Described cooling medium adopts nitrogen, cooling water, or be added with the cooling water of copper antioxidant and reducing agent.
Described mould adopts hot die steel, carbide alloy or cobalt-base alloys manufacture, preferably adopts carbide alloy and cobalt-base alloys.
Described cavity lid and supporting pad, adopt hot-work die steel making, preferably H13 steel making.
Described cooling duct, enters cavity from boots seat through support part, by nozzle, and the product that cooling medium is directly cooled to mould calibrating strap terminal end surface and squeezes out.
Described nozzle adopts semi-circular recesses, the radius of groove is less than 2mm, and the quantity of groove is no less than 2, the distribution that groove covers at cavity, be equally spaced as good with mould calibrating strap periphery, the position of groove is on the cavity lid end face of mould calibrating strap side end face and cavity lid end contact.
The pressure of described cooling medium is not less than 0.1MPa, and flow is not less than 20cm
3/ hour.
The present invention does not change existing continuous extruder principle, through improving structure, has compared with similar products significant effect:
1. the present invention includes at least three parts such as cavity, mould, cavity lid.Mould is to have one with urging stream angle and mould calibrating strap terminal in the die face contacting with cavity lid or mold support pad; On cavity, there is cooling duct, on the end face contacting with mould calibrating strap at cavity lid or mold support pad, have cooling medium nozzle, the position that cooling medium separates with mould calibrating strap at extruded product starts mould calibrating strap and product to spray cooling by nozzle.
Utilize the brute force purging effect of cooling medium, be gathered in crystallization zinc and zinc oxide near mould calibrating strap that gasification zinc condensation is produced are removed, and solve the sticking to mould problem at mould mouth place.
2. the present invention is arranged on the end face near cavity lid or supporting pad mould calibrating strap, cooling medium can be directly injected to the calibrating strap of mould, therefore the calibrating strap place temperature of mould significantly reduces, can improve the wearability of mould and the temperature of reduction product extrusion die, reduce zinc and separate out and improve die life, solve the white point problem in the continuously extruded process of brass.
3. utilization of the present invention increases a short stream angle at die entrance and reduces crimp resistance, and then reduces the temperature of product extrusion die mouth, reduces washing out of zinc.
4. when mould adopts carbide alloy or cobalt-base alloys mfg. moulding die described in, should add the overcoat of a hot die steel at carbide alloy or cobalt-base alloys cylindrical, core rod is applied to a prestressing force, avoid core rod cracking.
5. described in, nozzle groove quantity and size are unsuitable excessive, otherwise can affect the support strength of cavity lid to die face, and then affect die life.
6. the pressure of cooling medium is generally not less than 0.1MPa, and flow is not less than 20cm3/ hour.On cooling medium pipeline, should be furnished with pressure or flow control valve, to regulate intensity of cooling, intensity of cooling cross conference cause mould and blank temperature too low, cause product to extrude, or cause pushing the excessive and squeegee roller of energy consumption, cavity because of the life-span that extruding force increases and temperature rise causes too low.
7. the mould structure described in and cooling means have not only solved product surface white point problem and mould sticking to mould problem, can also after mould goes out die orifice, carry out cooling to product immediately, shorten the product recrystallization time, obtain fine grain structure, improve tensile strength, yield strength and the hardness of product.
Brief description of the drawings
Fig. 1 is copper alloy continuous extrusion device figure of the present invention;
Fig. 2 is copper alloy continuous extrusion cavity mould of the present invention and cooling nozzle structure schematic diagram;
Fig. 3 is die structure dwg of the present invention;
Fig. 4 (a) is cavity lid structure chart of the present invention, and Fig. 4 (b) is that the A of (a) is to view;
Fig. 5 is the continuous extrusion device structural representation that support part of the present invention adopts cavity lid and supporting pad.
In figure, 1 squeegee roller, 2 main shafts, 3 squeegee roller grooves, 4 compact wheels, 5 feeding guide-plates, 6 boots seats, 7 cavity matrixes, 8 cavity lids, 9 moulds, 10 material blocking blocks, 11 short stream angles, 12 nozzles, 13 moulds and cavity lid composition surface, 14 cavity charging apertures, 15 cooling-water ducts, the 16 squeegee roller faces of cylinder, 17 core rods, 18 die coats, 19 calibrating straps, 20 supporting pads.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but the present invention is not limited to specific embodiment.
Embodiment 1
A kind of continuous extrusion device that pushes copper alloy as shown in Figure 1, rotary squeezing wheel 1 is arranged on main shaft 2, drive squeegee roller 1 to rotate by main shaft 2, blank is sent into squeegee roller groove 3, through compact wheel 4, blank is pressed into squeegee roller groove 3, under blank and the 3 sidewall friction power drivings of squeegee roller groove, blank moves forward to material blocking block 10 through feeding guide-plate 5, under the stopping of material blocking block 10, blank enters cavity 7 by cavity charging aperture 14, squeezes out product by short stream angle 11 through the calibrating strap 19 of mould 9.
Feeding guide-plate 5 is arranged between cavity 7 and boots seat 6, fixes with pressing plate.Between the squeegee roller face of cylinder 16 and cavity matrix sealing surface, leave the gap of 0.3mm to 0.8mm, ensure can not occur directly to contact between the squeegee roller face of cylinder 16 and cavity matrix sealing surface, can effectively control flash amount simultaneously.
As shown in Figure 2, in described cavity 7, mould 9 is installed, fixing by cavity lid 8, between cavity lid 8 and cavity 7, be screwed, the cavity assembling is arranged in boots seat 6.
As shown in Figure 3, mould 9 is made up of core rod 17 and die coat 18, and core rod 17 and die coat adopt appropriate interference fit, to avoid mould to ftracture under operating pressure.On the core rod 17 of mould 9, have short stream angle 11, short stream angle charging aperture is larger than discharging opening diameter, forms taperedly, squeezes out the temperature of mould to reduce extruding force and blank.30 ° of the angle beta values at short stream angle 11.
As shown in Figure 4, fluted on cavity lid 8, after cavity lid and die assembly, groove forms nozzle 12, and nozzle 12 is circular groove, is uniformly distributed at mould calibrating strap 19 circumferencial directions.The cooling water that nozzle 12 sprays is directly got back in product bosh by boots seat hole.
The terminal of mould calibrating strap 19 is on mould and cavity lid faying face 13, can be by the directly cooling calibrating strap end face that is cooled to mould of cooling medium, therefore calibrating strap 19 place's temperature of mould significantly reduce, can improve the wearability of mould 9 and reduce product the temperature that goes out mould, reduce zinc and separate out and improve die life, solve the white point problem in the continuously extruded process of brass.
Embodiment 2
A kind of continuous extrusion device that pushes copper alloy as shown in Figure 5, basic structure is identical with embodiment 1, different is general for support part is obtained, support part adopts cavity lid and pad combining structure, between cavity lid 8 and mould 9, increase a supporting pad 20, nozzle 12 grooves that originally cover at cavity are manufactured on supporting pad.
Adopt the copper alloy continuous extrusion device of above-described embodiment 1 and 2, on 250 model continuous extruder, with the H62 of diameter 8mm, H65 brass garden bar, cavity 7 adopts GH4169 nickel base superalloy, material blocking block 10 adopts hot die steel, core rod 17 adopts cobalt-base alloys, die coat 18 adopts H13 hot-work die firm, short stream angle β is 30 °, mould calibrating strap length is 2mm, having realized the extruding of brass flat 1.45mm × 6.4mm attaching plug lenticular wire produces, also realized slide fastener lenticular wire simultaneously, top zipper stop, the only extruding of Y shape profile shapes down, and be applied to suitability for industrialized production, sticking to mould and white point technical barrier in the continuously extruded process of brass are thoroughly solved, good economic benefit and equipment benefit are obtained.
Claims (10)
1. one kind is pushed the continuous extrusion device of copper alloy, mould is installed in cavity, mould contacts with support part, it is characterized in that: the feed end of mould is with short stream angle, the discharge end of mould is with calibrating strap, the terminal of calibrating strap is on the end face of mould and support part, on support part end face, offer groove, the groove of support part and die face form cooling jet, support part also includes a cooling duct cooperatively interacting with cooling jet, cooling medium penetrates by nozzle after via cooling duct, begin to cool down mould calibrating strap end face and product at extruded product and calibrating strap separation point position.
2. a kind of continuous extrusion device that pushes copper alloy according to claim 1, is characterized in that: described support part adopts single cavity lid, and groove is opened on the cavity lid end face contacting with mould; Or cavity lid and supporting pad combination, supporting pad end face contacts with mould, and groove is on the supporting pad end face contacting with mould.
3. a kind of continuous extrusion device that pushes copper alloy according to claim 1, is characterized in that: described mould is made up of core rod and die coat interference assembling.
4. a kind of continuous extrusion device that pushes copper alloy according to claim 1, is characterized in that: the angle beta value at described short stream angle is 20 ° to 60 °; Preferably 30 °.
5. a kind of continuous extrusion device that pushes copper alloy according to claim 1, is characterized in that: described cooling medium adopts nitrogen, cooling water, or be added with the cooling water of copper antioxidant and reducing agent.
6. a kind of continuous extrusion device that pushes copper alloy according to claim 1, is characterized in that: described mould adopts hot die steel, carbide alloy or cobalt-base alloys manufacture, preferably adopts carbide alloy and cobalt-base alloys.
7. a kind of continuous extrusion device that pushes copper alloy according to claim 1, is characterized in that: described cavity lid and supporting pad, adopt hot-work die steel making, preferably H13 steel making.
8. a kind of continuous extrusion device that pushes copper alloy according to claim 1, it is characterized in that: described cooling duct, enter cavity from boots seat through support part, by nozzle, the product that cooling medium is directly cooled to mould calibrating strap terminal end surface and squeezes out.
9. a kind of continuous extrusion device that pushes copper alloy according to claim 1, it is characterized in that: described nozzle adopts semi-circular recesses, the radius of groove is less than 2mm, the quantity of groove is no less than 2, the distribution that groove covers at cavity, be equally spaced as good with mould calibrating strap periphery, the position of groove is on the cavity lid end face of mould calibrating strap side end face and cavity lid end contact.
10. a kind of continuous extrusion device that pushes copper alloy according to claim 1, is characterized in that: the pressure of described cooling medium is not less than 0.1MPa, and flow is not less than 20cm
3/ hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410311337.4A CN104148431A (en) | 2014-06-30 | 2014-07-02 | Continuous extrusion device for extruding copper alloy |
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|---|---|---|---|
| CN201410303485.1 | 2014-06-30 | ||
| CN201410303485 | 2014-06-30 | ||
| CN201410311337.4A CN104148431A (en) | 2014-06-30 | 2014-07-02 | Continuous extrusion device for extruding copper alloy |
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| CN104148431A true CN104148431A (en) | 2014-11-19 |
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| CN201410311337.4A Pending CN104148431A (en) | 2014-06-30 | 2014-07-02 | Continuous extrusion device for extruding copper alloy |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105855489A (en) * | 2016-03-31 | 2016-08-17 | 管仁国 | Multi-line-groove continuous forming device and method for liquid metal |
| CN107159731A (en) * | 2017-06-20 | 2017-09-15 | 远东电缆有限公司 | A kind of aluminium profiles line and aluminium profiles exclusion pressing production line |
| CN107159730A (en) * | 2017-06-20 | 2017-09-15 | 远东电缆有限公司 | A kind of aluminium profiles line, aluminium profiles row's continuous extruder |
| CN111394609A (en) * | 2020-04-24 | 2020-07-10 | 浙江大学 | Continuous extrusion process of high-strength high-conductivity copper alloy, application of continuous extrusion process and die material |
| CN113732093A (en) * | 2021-09-30 | 2021-12-03 | 江阴电工合金股份有限公司 | Production device of high-strength copper-chromium-zirconium contact line |
| CN114515777A (en) * | 2022-03-03 | 2022-05-20 | 中北大学 | Continuous extrusion forming device and method for magnesium alloy wire for electric arc additive manufacturing |
| CN116140586A (en) * | 2023-03-13 | 2023-05-23 | 池州市安安新材科技有限公司 | Extruder for extrusion molding of high-strength and high-toughness aluminum alloy melt and extrusion method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105855489A (en) * | 2016-03-31 | 2016-08-17 | 管仁国 | Multi-line-groove continuous forming device and method for liquid metal |
| CN107159731A (en) * | 2017-06-20 | 2017-09-15 | 远东电缆有限公司 | A kind of aluminium profiles line and aluminium profiles exclusion pressing production line |
| CN107159730A (en) * | 2017-06-20 | 2017-09-15 | 远东电缆有限公司 | A kind of aluminium profiles line, aluminium profiles row's continuous extruder |
| CN111394609A (en) * | 2020-04-24 | 2020-07-10 | 浙江大学 | Continuous extrusion process of high-strength high-conductivity copper alloy, application of continuous extrusion process and die material |
| CN113732093A (en) * | 2021-09-30 | 2021-12-03 | 江阴电工合金股份有限公司 | Production device of high-strength copper-chromium-zirconium contact line |
| CN114515777A (en) * | 2022-03-03 | 2022-05-20 | 中北大学 | Continuous extrusion forming device and method for magnesium alloy wire for electric arc additive manufacturing |
| CN114515777B (en) * | 2022-03-03 | 2024-05-07 | 中北大学 | Continuous extrusion forming device and method for magnesium alloy wire for arc additive manufacturing |
| CN116140586A (en) * | 2023-03-13 | 2023-05-23 | 池州市安安新材科技有限公司 | Extruder for extrusion molding of high-strength and high-toughness aluminum alloy melt and extrusion method thereof |
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Application publication date: 20141119 |