CN106623488A - Rectangular double-hole silver-copper pipe processing method - Google Patents
Rectangular double-hole silver-copper pipe processing method Download PDFInfo
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- CN106623488A CN106623488A CN201610658979.0A CN201610658979A CN106623488A CN 106623488 A CN106623488 A CN 106623488A CN 201610658979 A CN201610658979 A CN 201610658979A CN 106623488 A CN106623488 A CN 106623488A
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- rectangle
- processing method
- copper pipe
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- 238000003672 processing method Methods 0.000 title claims abstract description 17
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical compound [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 title abstract 3
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000005266 casting Methods 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000007689 inspection Methods 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 239000012459 cleaning agent Substances 0.000 claims abstract description 4
- 238000003723 Smelting Methods 0.000 claims abstract 3
- 229910052802 copper Inorganic materials 0.000 claims description 22
- 239000010949 copper Substances 0.000 claims description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 20
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 19
- 229910052709 silver Inorganic materials 0.000 claims description 19
- 239000004332 silver Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 15
- 230000007704 transition Effects 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 238000000137 annealing Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 238000005482 strain hardening Methods 0.000 claims description 3
- 150000001879 copper Chemical class 0.000 claims 1
- PTVDYARBVCBHSL-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu] PTVDYARBVCBHSL-UHFFFAOYSA-N 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 238000001953 recrystallisation Methods 0.000 claims 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 238000004513 sizing Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- -1 copper metalloid Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052752 metalloid Inorganic materials 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004540 process dynamic Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/151—Making tubes with multiple passages
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention provides a rectangular double-hole silver-copper pipe processing method. The method includes: step S1, smelting; step S2, ingot casting; step S3, extruding; step S4, pre-drawing; step S5, heat treatment; step S6, post-drawing; step S7, finishing, to be more specific, straightening, cutting ends, adopting a fine saw machine for 250mm end cutting of straightened products, adopting cleaning equipment for clearing scraps of end-cut products with high-pressure air, cleaning with high-pressure water and cleaning agents, subjecting the cleaned products to re-finishing, sizing according to required lengths, and clearing inner and outer surfaces; step S8, inspection; step S9, packaging and storing of finished products. Compared with the prior art, the rectangular double-hole silver-copper pipe processing method has advantages that demands of domestic high-power generator set manufacturers on supply of the products are met, and shape particularity, dimensional tolerance and product performances are strictly required.
Description
Technical field
The present invention is a kind of processing method of rectangle diplopore silver-bearing copper pipe, belongs to technical field of nonferrous metal processing.
Background technology
Rectangle diplopore silver-bearing copper pipe has that conductive section is big, the unit interval is by many, perfect heat-dissipating of cooling medium consumption etc.
Feature, is critical material that high-power (more than 600,000 kilowatts) thermal power generation unit rotor windings are expected.Using rectangle diplopore
Silver-bearing copper pipe replaces traditional single hole pipe, greatly improves flow velocity and radiating effect of the medium in pipe, and it is used on generator,
Special super high power generator amature winding, greatly improves generating capacity, makes general power to improve nearly 30%, at present very
More well-known generating equipment producer all is expecting to adopt this rectangle diplopore silver-bearing copper pipe.Such as：East motor, Shanghai motor, Harbin
Motor, Shandong motor, north weight Alstom etc. are all in the critical material being badly in need of in this Generator Set.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the present invention to provide a kind of processing method of rectangle diplopore silver-bearing copper pipe,
Propose in solve the problems, such as above-mentioned background technology, the present invention is easy to use, be easy to operation, good stability, reliability is high.
To achieve these goals, the present invention is by the following technical solutions realizing：A kind of rectangle diplopore silver-bearing copper pipe
Processing method, comprise the following steps：
Step S1, melting makes its chemical conversion steel water copper metalloid block by heating；
Step S2, ingot casting is poured in the mould for designing with the steel water of fusing and forms product；
Step S3, for the extrusion billet that double-hole tube is provided is also diplopore blank, so the pecker adopted during extruding
Must be crosspointer, and it is unusual imbalance that crosspointer deviates extruding center position metal flow of left and right in extrusion process,
Under powerful extruding force effect, make crosspointer to Centre position deviation, cause the diplopore pipe wall thickness deviation extruded excessive, it is impossible to full
The processing of foot procedure, so the key point of the present invention is that and solves problems.Equilibrant force mould is adopted in extruding
Hole, makes section both sides metal flow out from balance nib, it is therefore prevented that this part metals flows to big cross section and causes pecker to center
Skew, it is serious so as to solve the problems, such as diplopore pipe wall thickness deviation.In addition, to prevent during extruding perforation, pecker is to being doomed
Off-centring, punching process is carried out before extruding production by ingot casting, and aperture size is more than pecker 0.5-1.0mm.
Step S4, front drawing, by extruding double-hole tube blank material, gradually transition is drawn into double-hole tube；
Step S5, heat treatment, in step s 4, the inequality to produce during three heat treatment is to eliminate cold working
Even deformation, recovers plastic deformation, and annealing temperature will be maintained at 520-550 DEG C, be incubated 60-80min, fully be softened again with obtaining
Crystalline structure, to prevent product from aoxidizing, will carry out N2Protection, will carry out being evacuated to -0.1MPa to furnace chamber, and power transmission heating is moved back
Fire, double-hole tube product can come out of the stove below 60 DEG C；
Step S6, rear drawing, the dimensional tolerance according to required by finished product is designed, external mold to drawing die external mold, internal model
Tool inlet angle should adopt 12 ° of angles, entrance R that R5, calibrating strap should be adopted to control within 6mm, to prevent excessive deformation from causing product
Surface defect, internal model controls the distance between two rectangle internal models simultaneously using double square internal model, and internal model corner R is R0.8, square
It is preferably minimized can the reaction force in drawing process, makes the rectangular tube surface quality for drawing out reach high-precision level standard；
Step S7, finishing, in finishing, alignment first carries out essence using special horizontal rectangle straightener to double-hole tube
Thin alignment, it is ensured that linearity≤0.5mm/m, flatness≤1mm/m, torsion resistance≤1mm/m, then crop, using serration sawing machine
250mm crops are carried out to the product after alignment, gases at high pressure is carried out to the product for cutting through head using cleaning equipment and is considered to be worth doing clearly, and with high
Pressure water adds cleaning agent to be cleaned, and to the product after cleaning finishing is carried out again, and finally length on request is cut scale, clears up interior
Outer surface；
Step S8, inspection is checked the dimensional tolerance on request of the product after finishing and indices：
Step S9, finished product packing warehouse-in, to through the qualified double-hole tube of finished product inspection, finished product packing being carried out on request and being entered
Storehouse.
Further, in step s3, to prevent during extruding perforation, pecker is extruded before producing to off-centring is doomed
Ingot casting is carried out into punching process, aperture size is more than pecker 0.5-1.0mm.
Further, in step S4 and step S5, by drawing transition deformation, by extrusion blank material endoporus by circle by
Gradual transition is rectangle, the working modulus control of every time transition deformation 25% or so, lengthening coefficient should control 1.30-1.35 it
Between.
Further, in step s 6, drawing external mold material selection carbide alloy YG 8, stretches internal model material selection speciality
Steel T10a, working surface hard chrome plating 0.03-0.05mm, because product is rectangle double-hole tube, so every time stretching is all using double
Internal model and single external mold.
Further, in step s 8, linearity≤0.5mm/m, flatness≤1mm/m, torsion resistance≤1mm/ be should ensure that
m。
Beneficial effects of the present invention：A kind of processing method of rectangle diplopore silver-bearing copper pipe of the present invention, solves the big work(of China
Supply requirement of the rate generating set manufacturing firm to the product, its feature is particularity, dimensional tolerance and the product of shape
The strict demand of energy.
Description of the drawings
The detailed description by reading non-limiting example made with reference to the following drawings, the further feature of the present invention,
Objects and advantages will become more apparent upon：
The step of Fig. 1 is the processing method of rectangle diplopore silver-bearing copper pipe in the present invention is schemed；
Fig. 2 is the cast ingot product schematic diagram in the present invention before the extruding of the processing method of rectangle diplopore silver-bearing copper pipe；
Fig. 3 is the product schematic diagram in the present invention after the front drawing of the processing method of rectangle diplopore silver-bearing copper pipe；
Fig. 4 is the schematic diagram of the processing mold design of rectangle diplopore silver-bearing copper pipe in the present invention；
Fig. 5 is the final drawing finished product schematic diagram of rectangle diplopore silver-bearing copper pipe in the present invention.
Specific embodiment
Technological means, creation characteristic, reached purpose and effect to make present invention realization is easy to understand, with reference to
Specific embodiment, is expanded on further the present invention.
Fig. 1 is referred to, the present invention provides a kind of technical scheme：A kind of processing method of rectangle diplopore silver-bearing copper pipe, including with
Lower step：
Step S1, melting makes its chemical conversion steel water copper metalloid block by heating.
Step S2, ingot casting is poured in the mould for designing with the steel water of fusing and forms product.
The chemical composition of ingot casting such as following table：
| Chemical element | Cu+Ag | Ag | 0 | Other elements |
| Content | ＞ 99.97% | 0.08-0.12% | ≤ 0.001% | ＜ 0.03% |
Step S3, extruding, for the extrusion billet that double-hole tube is provided is also diplopore blank, so what is adopted during extruding wears
Hole pin must be crosspointer, and it is ingot casting center that crosspointer deviates extruding center position, the metal stream of left and right in extrusion process
Dynamic is unusual imbalance, under powerful extruding force effect, makes crosspointer to Centre position deviation, causes the diplopore pipe extruded
Wall thickness deviation is excessive, it is impossible to meet the processing of next procedure, so the key point of the present invention is that and solves problems,
Equilibrant force nib is adopted during extruding, section both sides metal is flowed out from balance nib, it is therefore prevented that this part metals flow direction is big disconnected
Pecker is caused to off-centring in face, serious so as to solve the problems, such as diplopore pipe wall thickness deviation.In addition, to prevent extruding from wearing
Ingot casting is carried out punching process by Kong Shi, pecker to off-centring is doomed before extruding production, and aperture size is more than pecker 0.5-
1.0mm, such as Fig. 2, the technological measure by more than solves the skill that extruding provides qualified double-hole tube blank material for next procedure
An art difficult problem.
Step S4, front drawing, by extruding double-hole tube blank material, gradually transition is drawn into double-hole tube.
Step S5, heat treatment, in step s 4, the inequality to produce during three heat treatment is to eliminate cold working
Even deformation, recovers plastic deformation, and annealing temperature will be maintained at 520-550 DEG C, be incubated 60-80min, fully be softened again with obtaining
Crystalline structure, to prevent product from aoxidizing, will carry out N2Protection, will carry out being evacuated to -0.1MPa to furnace chamber, and power transmission heating is moved back
Fire, double-hole tube product can come out of the stove below 60 DEG C.
In step S4 and step S5, by drawing transition deformation, it is by circular gradually transition by extrusion blank material endoporus
Rectangle, the working modulus of every time transition deformation is controlled 25% or so, and lengthening coefficient should be controlled between 1.30-1.35.
Product such as Fig. 3 after front drawing and heat treatment.
Step S6, rear drawing, the dimensional tolerance according to required by finished product is designed, external mold to drawing die external mold, internal model
Tool inlet angle should adopt 12 ° of angles, entrance R that R5, calibrating strap should be adopted to control within 6mm, to prevent excessive deformation from causing product
Surface defect, internal model controls the distance between two rectangle internal models simultaneously using double square internal model, and internal model corner R is R0.8, square
It is preferably minimized can the reaction force in drawing process, makes the rectangular tube surface quality for drawing out reach high-precision level standard.
In step s 6, drawing external mold material selection carbide alloy YG 8, stretches internal model material selection speciality steel T10a, work
Make plating hard chromium on surface 0.03-0.05mm, because product is rectangle double-hole tube, so every time stretching is all outer using double internal models and list
Mould.
Drawing China and foreign countries mould, internal model such as Fig. 4 afterwards.
Step S7, finishing, in finishing, alignment first carries out essence using special horizontal rectangle straightener to double-hole tube
Thin alignment, it is ensured that linearity≤0.5mm/m, flatness≤1mm/m, torsion resistance≤1mm/m, then crop, using serration sawing machine
250mm crops are carried out to the product after alignment, gases at high pressure is carried out to the product for cutting through head using cleaning equipment and is considered to be worth doing clearly, and with high
Pressure water adds cleaning agent to be cleaned, and to the product after cleaning finishing is carried out again, and finally length on request is cut scale, clears up interior
Outer surface.
Step S8, inspection is checked the dimensional tolerance on request of the product after finishing and indices.
In step s 8, linearity≤0.5mm/m, flatness≤1mm/m, torsion resistance≤1mm/m be should ensure that.
Step S9, finished product packing warehouse-in, to through the qualified double-hole tube of finished product inspection, finished product packing being carried out on request and being entered
Storehouse.
The present invention solves supply requirement of the Electricity Generation unit manufacturing firm of China to the product, and its feature is shape
The strict demand of the particularity, dimensional tolerance and properties of product of shape.
The general principle and principal character and advantages of the present invention of the present invention are had been shown and described above, for this area skill
For art personnel, it is clear that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the spirit without departing substantially from the present invention or
In the case of essential characteristic, the present invention can be in other specific forms realized.Therefore, no matter from the point of view of which point, all should be by
Embodiment regards exemplary as, and be it is nonrestrictive, the scope of the present invention by claims rather than on state
Bright restriction, it is intended that all changes in the implication and scope of the equivalency of claim that will fall are included in the present invention
It is interior.Any reference in claim should not be considered as and limit involved claim.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity those skilled in the art should
Using specification as an entirety, the technical scheme in each embodiment can also Jing it is appropriately combined, form those skilled in the art
Understandable other embodiment.
Claims (5)
1. the processing method of rectangle diplopore silver-bearing copper pipe, comprises the following steps：
Step S1, melting makes its chemical conversion steel water copper class raw material metal block by smelting furnace；
Step S2, ingot casting, smelting furnace makes copper water be solidified as copper ingot by crystallizer；
Step S3, extruding adopts equilibrant force nib, additional nib section both sides metal is flowed from balance nib in extruding
Go out, it is therefore prevented that this part metals flows to big cross section and causes pecker to off-centring；
Step S4, front drawing, by extruding double-hole tube blank material, gradually transition is drawn into double-hole tube；
Step S5, heat treatment, in step s 4, the uneven change to produce during three heat treatment is to eliminate cold working
Shape, recovers plastic deformation, and annealing temperature will be maintained at 520-550 DEG C, be incubated 60-80min, to obtain the recrystallization of abundant softening
Tissue, to prevent product from aoxidizing, will carry out N2Protection, will carry out being evacuated to a 0.1MPa to furnace chamber, and power transmission heating anneal is double
Hole pipe product can come out of the stove below 60 DEG C；
Step S6, rear drawing, the dimensional tolerance according to required by finished product is designed to drawing die external mold, internal model, and outer mold enters
Bicker should adopt 12 ° of angles, entrance R that R5, calibrating strap should be adopted to control within 6mm, to prevent excessive deformation from causing product surface
Defect, internal model controls the distance between two rectangle internal models simultaneously using double square internal model, and internal model corner R is R0.8, can be made
Reaction force in drawing process is preferably minimized, and makes the rectangular tube surface quality for drawing out reach high-precision level standard；
Step S7, finishing, in finishing, alignment first carries out fine school using special horizontal rectangle straightener to double-hole tube
Directly, it is ensured that linearity≤0.5mm/m, flatness≤1mm/m, torsion resistance≤1mm/m, then crop, using serration sawing machine to school
Product after straight carries out 250mm crops, carries out gases at high pressure to the product for cutting through head using cleaning equipment and considers to be worth doing clearly, and uses water under high pressure
Plus cleaning agent is cleaned, finishing is carried out again to the product after cleaning, finally length on request cuts scale, the interior appearance of cleaning
Face；
Step S8, inspection is checked the dimensional tolerance on request of the product after finishing and indices；
Step S9, finished product packing warehouse-in, to through the qualified double-hole tube of finished product inspection, finished product packing and warehouse-in being carried out on request.
2. the processing method of a kind of rectangle diplopore silver-bearing copper pipe according to claim 1, it is characterised in that：In step s3,
To prevent during extruding perforation, ingot casting is carried out punching process by pecker to off-centring is doomed before extruding production, and aperture size is big
In pecker 0.5-1.0mm.
3. the processing method of a kind of rectangle diplopore silver-bearing copper pipe according to claim 1, it is characterised in that：In step S4 and step
In rapid S5, by drawing transition deformation, by extrusion blank material endoporus, by circle, gradually transition is rectangle, every time transition deformation
Working modulus is controlled 25% or so, and lengthening coefficient should be controlled between 1.30-1.35.
4. the processing method of a kind of rectangle diplopore silver-bearing copper pipe according to claim 1, it is characterised in that：In step s 6,
Drawing external mold material selection carbide alloy YG 8, stretches internal model material selection speciality steel T10a, working surface hard chrome plating 0.03-
0.05mm, because product is rectangle double-hole tube, so every time stretching is all using double internal models and single external mold.
5. the processing method of a kind of rectangle diplopore silver-bearing copper pipe according to claim 1, it is characterised in that：In step s 8,
Should ensure that linearity≤0.5mm/m, flatness≤1mm/m, torsion resistance≤1mm/m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610658979.0A CN106623488B (en) | 2016-08-04 | 2016-08-04 | A kind of processing method of rectangle diplopore silver-bearing copper pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610658979.0A CN106623488B (en) | 2016-08-04 | 2016-08-04 | A kind of processing method of rectangle diplopore silver-bearing copper pipe |
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| CN106623488B CN106623488B (en) | 2018-07-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108941227A (en) * | 2018-07-09 | 2018-12-07 | 中南大学 | A kind of preparation process of aviation Al-Mg-Sc alloy tubing |
| CN110227906A (en) * | 2019-05-08 | 2019-09-13 | 东莞市欧莱溅射靶材有限公司 | A kind of corronil rotary target material and its production method |
| CN110465907A (en) * | 2019-08-12 | 2019-11-19 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of cross screw driver conehead and its processing method |
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| CN105032982A (en) * | 2015-06-11 | 2015-11-11 | 沈阳东管电力科技集团股份有限公司 | Three-way hot pressing process |
| CN105363819A (en) * | 2015-12-08 | 2016-03-02 | 广西南南铝加工有限公司 | 4G base station aluminum alloy radiator profile extrusion mold |
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| DE2918600A1 (en) * | 1979-05-09 | 1980-11-13 | Schmoele Metall R & G | HOLLOW PROFILE CONDUCTOR |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108941227A (en) * | 2018-07-09 | 2018-12-07 | 中南大学 | A kind of preparation process of aviation Al-Mg-Sc alloy tubing |
| CN108941227B (en) * | 2018-07-09 | 2020-04-10 | 中南大学 | Preparation process of aluminum-magnesium-scandium alloy pipe for aviation |
| CN110227906A (en) * | 2019-05-08 | 2019-09-13 | 东莞市欧莱溅射靶材有限公司 | A kind of corronil rotary target material and its production method |
| CN110465907A (en) * | 2019-08-12 | 2019-11-19 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of cross screw driver conehead and its processing method |
| CN110465907B (en) * | 2019-08-12 | 2021-08-17 | 中国航空工业集团公司沈阳飞机设计研究所 | Cross-shaped cone-opening head and processing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106623488B (en) | 2018-07-31 |
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Inventor after: Bao Longjun Inventor after: Liu Shuailiang Inventor before: Bao Longjun |
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Denomination of invention: Rectangular double-hole silver-copper pipe processing method Effective date of registration: 20190626 Granted publication date: 20180731 Pledgee: Victory Branch of Hengshui Bank Co., Ltd. Pledgor: Hebei Ou Tong non-ferrous metal Products Co., Ltd Registration number: 2019130000010 |
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Date of cancellation: 20210427 Granted publication date: 20180731 Pledgee: Victory Branch of Hengshui Bank Co.,Ltd. Pledgor: HEBEI OUTONG NONE-FERROUS METAL PRODUCTS Co.,Ltd. Registration number: 2019130000010 |
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Denomination of invention: A processing method of rectangular double hole silver copper tube Effective date of registration: 20210507 Granted publication date: 20180731 Pledgee: Victory Branch of Hengshui Bank Co.,Ltd. Pledgor: HEBEI OUTONG NONE-FERROUS METAL PRODUCTS Co.,Ltd. Registration number: Y2021130000008 |
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