CN102615482A - Production method of oversized-diameter anode phosphorus copper ball - Google Patents
Production method of oversized-diameter anode phosphorus copper ball Download PDFInfo
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- CN102615482A CN102615482A CN2012101167794A CN201210116779A CN102615482A CN 102615482 A CN102615482 A CN 102615482A CN 2012101167794 A CN2012101167794 A CN 2012101167794A CN 201210116779 A CN201210116779 A CN 201210116779A CN 102615482 A CN102615482 A CN 102615482A
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Abstract
The invention belongs to the technical field of phosphorus copper balls for electroplating and particularly relates to a production method of an oversized-diameter anode phosphorus copper ball. The method comprises the following steps of: firstly melting pure copper and phosphorus copper intermediate alloy to obtain a phosphorus copper alloy solution and producing a phosphorus copper alloy rod by utilizing the uniformly mixed phosphorus copper alloy solution through an upward casting method; feeding the obtained phosphorus copper alloy rod into a continuous extruding machine for extrusion, wherein the phosphorus copper alloy rod is driven by an extrusion wheel to be forcedly pressed into an extrusion cavity and is extruded according to the designed size so as to obtain an ultra-fine grain phosphorus copper rod blank; and finally performing cold heading and molding on the obtained ultra-fine grain phosphorus copper rod blank by utilizing a cold header, so as to form phosphorus copper ball of design specification. The phosphorus copper ball obtained by utilizing the production method has a smooth, round and complete surface and a compact internal crystal structure, and has the advantage of obviously improved appearance and internal quality compared with the phosphorus copper ball obtained by utilizing an existing technology.
Description
Technical field
The invention belongs to the phosphorous copper balls technical field that is used to electroplate, be specifically related to a kind of production method of super-large diameter anodic phosphorous copper balls.
Background technology
Anode phosphorus ball is a kind of phosphorous copper base bianry alloy material, with ball, grain or tabularly be widely used in industrial circles such as printed circuit board, five metals, decoration as the galvanic anode material.China's electro-coppering anode major part is spherical at present, and diameter is between 20～40mm, and the tap of PCB industry---Japan and the used spherical copper anode diameter of Korea S are all about 55mm.Because leftover pieces were many when bead was electroplated, and formed the anode body refuse easily, caused coating coarse, plating bath is muddy, thereby has influenced current efficiency, the performance of plating bath and the quality of coating.And large ball games can fully be dissolved in electroplating process, has overcome bead because quality problems such as the plating piece that the anode body refuse caused that the leftover pieces multiform becomes is jagged, unsmooth.Because the last leftover pieces of large ball games are few, not only improve the anode utilization rate in addition, and reduced the frequency that plating bath is changed, practiced thrift cost, improved production efficiency greatly.
Φ 55mm phosphorous copper balls forming technique is one world-class technical barrier.Japan and Korea S produce the general method of drawing continuous casting down that adopts of Φ 55mm phosphorous copper balls and produce super large-scale rod base, on excellent base, produce Φ 55mm phosphorous copper balls with digging the ball machine, and this defective workmanship is that output is little, anodic phosphorous copper balls internal crystallization tissue looseness.More domestic big printed circuit board enterprises have recognized that the advantage of large ball games in plating, but because the large-scale production of Φ 55mm super large-scale phosphorous copper balls still belongs to blank at home, therefore annual the need from Korea S's import Φ 55mm phosphorous copper balls to satisfy the domestic production demand.
The Chinese patent name is called a kind of anodic phosphorous copper room temperature screw groove diagonal rolling manufacturing process (publication number CN1569359A) provides a kind of phosphorous copper balls forming method; It is characterized in that the roll forming in skew rolling mill of at room temperature circular copper rod material; A pair of have identical pass and homodromal roll are housed on this milling train; Mainly by constituting with at the bottom of the corresponding fin of copper ball profile, arc-shaped slot and the straight trough, pass is 1～4 to said roll.The operation of rolling is carried out continuously, and roll whenever rotates a circle and produces one or more anodic phosphorous copper balls, and per minute can be produced 30～200.The advantage of this invention is that production efficiency is high, need not heating, the non-oxidation phenomenon, and energy consumption is little, good product quality, cost is low.But can only produce Φ anodic phosphorous copper balls below 30 millimeters, can't produce 55 millimeters anodic phosphorous copper balls of super large-scale Φ.
The Chinese patent name is called PCB electronic circuit board level phos-copper ball production method (publication number CN101301717A) and also discloses a kind of phosphorous copper balls production method; It comprises the steps: a, batching; High melt becomes phosphor-copper liquid, and it is cast the intermediate products (bar) of format diameter 55mm; B, PCB phosphorous copper balls are rolling; Driving bar through spheroid tanning mould A in the production equipment and mould B advances in high speed rotating; Intermediate products bar self-heating forms under the condition of high temperature in the high speed rotating, and progressively from 1/8,1/4,1/2,3/4,7/8, forms until whole semi-finished product spheroid; C, the polishing of PCB phosphorous copper balls semi-finished product, cleaning, oven dry; D, finished product are packed automatically, weight is rechecked.This invention has efficient height, low, the stable strong characteristics of power consumption, has improved the compactness of metallic crystal, has excellent generalization values, but also can only produce Φ anodic phosphorous copper balls below 30 millimeters.
Summary of the invention
The production method that the purpose of this invention is to provide a kind of super-large diameter anodic phosphorous copper balls that is used to electroplate.
For realizing the foregoing invention purpose, the present invention has adopted following technical scheme: a kind of production method of super-large diameter anodic phosphorous copper balls, it comprises the steps:
1), fine copper is fused into copper liquid in melting furnace; Again with copper liquid in chute is sent into holding furnace;, chute adds phosphor bronze alloy when flowing at copper liquid; The back mixing with copper liquid of phosphor bronze alloy fusing obtains phosphor copper solution, and the content of copper is at least 99.9% in the said phosphor copper solution, and phosphorus content is 0.035～0.065%;
2), adopt the up casting method to produce the phosphor copper bar the above-mentioned phosphor copper solution that mixes;
3), the phosphor copper bar of above-mentioned gained sent into continuous extruder push, the phosphor copper bar is compelled to be pressed into extrusion chamber under the drive of squeegee roller, be extruded and obtain ultra-fine grain phosphor-copper bar base according to the size that is designed;
4), the ultra-fine grain phosphor-copper bar base of above-mentioned gained is adopted the cold headers cold-heading molding, to form the phosphorous copper balls of the specification that designed.
Above-mentioned steps 1) phosphor bronze alloy is under the state of the airtight protection of reducibility gas in the copper liquid in the adding chute in, and said reducibility gas is a carbon monoxide.
Above-mentioned steps 2) diameter of phosphor copper bar is 6～30mm in.
The present invention compared with prior art has following obvious advantage:
(1) adopt reducibility gas to protect the chute of copper flow warp; Solved melting furnace copper liquid and phosphor bronze alloy add validity from operation to airtight holding furnace; Make the addition and the holding furnace copper liquid magnitude of recruitment of phosphor bronze alloy realize accurately control, guaranteed the stability of final product quality.
When (2) squeegee roller drives phosphor copper bar entering continuous extruder; The phosphor copper bar is stopped by material blocking rod, is compelled to be pressed into extrusion chamber, and original as-cast structure fragmentation of phosphor copper bar at this moment also produces a large amount of deformation heat; Crystallization again takes place in phosphor copper under the double action of inner strong stress of extrusion chamber and high-temperature factor; Generation micromeritics tissue, and go out interruption-forming ultra-fine grain phosphor-copper bar base at extrusion chamber, the inside crystal grain of ultra-fine grain phosphor-copper bar base is fine and close; Evenly the disengaging of copper ion when helping electroplating increased electroplating efficiency;
(3) utilization can be with the fine and close ultra-fine grain phosphor-copper bar base of the crystal grain of producing multiple size with one procedure without the mould of size, and production efficiency is high;
(4) adopt high-power ball cold header former and formpiston matched moulds super large-scale phosphorous copper balls with the moulding all size; The smooth surface of resulting phosphorous copper balls, rounding; And internal crystallization dense structure, outward appearance and internal soundness all are significantly improved than the phosphorous copper balls that adopts prior art to obtain.
The specific embodiment
Through the concrete operations step the present invention is done further explanation below:
1, adopt upward-casting process to produce the phosphor copper bar.
Cathode copper is fused into copper liquid in melting furnace, again with copper liquid in chute is sent into holding furnace, when chute flows, add phosphor bronze alloy at copper liquid, after casting obtains the phosphor copper bar.
Copper liquid and phosphor bronze alloy in the melting furnace add in the holding furnace with gap; Each addition of phosphor bronze alloy and the each copper liquid of holding furnace magnitude of recruitment are proportional; Make that the content of copper is at least 99.9% in the phosphor copper solution in the holding furnace, phosphorus content is 0.035～0.065%.
Phosphor bronze alloy is under the state of the airtight protection of reducibility gas in the copper liquid in the adding chute, and said reducibility gas is a carbon monoxide, and the phosphor copper that gained mixes is produced Φ 20mm phosphor copper bar with Φ 20mm crystallizer.
2, will go up the Φ 20mm rod base that an operation obtains and be processed as the ultra-fine brilliant enhanced type phosphor-copper bar base of Φ 40mm with continuous extrausion process.
The above big specification phosphor-copper bar base of Φ 40mm can't be used the method production of up casting owing to conduct oneself with dignity, the big specification phosphor-copper of the general main employing semi-continuous casting method of domestic prior art production bar base, and the surface oxidation blackout of gained phosphor-copper bar base, yield rate is low.
The present invention has increased in producing Φ 55mm phosphor-copper club base process and has cast the shank diameter expansion process together; Promptly adopting the continuous up-casting system to produce Φ 20mm rod base, be processed into the excellent base of Φ 40mm again with continuous extruder extruding expansion, specifically is to adopt squeegee roller to drive Φ 20mm phosphor copper bar to get into continuous extruder; The phosphor copper bar is stopped by material blocking rod; Be compelled to be pressed into extrusion chamber, this moment, original as-cast structure brokenly also produced a large amount of deformation heat, and phosphor copper under the double action of inner strong stress of extrusion chamber and high-temperature factor crystallization again takes place; Generation micromeritics tissue, back go out the ultra-fine grain phosphor-copper bar base of interruption-forming Φ 30mm～Φ 40mm through extrusion chamber.
3, will go up the ultra-fine brilliant enhanced type phosphor-copper bar base employing cold-heading molding technology production Φ 55mm super large-scale phosphorous copper balls of Φ 40mm that an operation obtains.
The ultra-fine grain phosphor-copper bar base of Φ 30mm～Φ 40mm; Through high-power ball cold header former and formpiston matched moulds; Moulding Φ 55mm super large-scale phosphorous copper balls; Resulting phosphorous copper balls smooth surface, rounding, internal crystallization dense structure, outward appearance and internal soundness are processed ball and are significantly improved than directly digging with the casting bar.
Claims (6)
1. the production method of a super-large diameter anodic phosphorous copper balls, it comprises the steps:
1), fine copper is fused into copper liquid in melting furnace; Again with copper liquid in chute is sent into holding furnace;, chute adds phosphor bronze alloy when flowing at copper liquid; The back mixing with copper liquid of phosphor bronze alloy fusing obtains phosphor copper solution, and the content of copper is at least 99.9% in the said phosphor copper solution, and phosphorus content is 0.035～0.065%;
2), adopt the up casting method to produce the phosphor copper bar the above-mentioned phosphor copper solution that mixes;
3), the phosphor copper bar of above-mentioned gained sent into continuous extruder push, the phosphor copper bar is compelled to be pressed into extrusion chamber under the drive of squeegee roller, be extruded and obtain ultra-fine grain phosphor-copper bar base according to the size that is designed;
4), the ultra-fine grain phosphor-copper bar base of above-mentioned gained is adopted the cold headers cold-heading molding, to form the phosphorous copper balls of the specification that designed.
2. the production method of super-large diameter anodic phosphorous copper balls according to claim 1 is characterized in that: phosphor bronze alloy is under the state of the airtight protection of reducibility gas in the copper liquid in the adding chute in the step 1).
3. the production method of super-large diameter anodic phosphorous copper balls according to claim 1 and 2 is characterized in that: step 2) in phosphor copper solution adopt Φ 20mm crystallizer to produce the phosphor copper bar that diameter is 20mm.
4. the production method of super-large diameter anodic phosphorous copper balls according to claim 2 is characterized in that: described reducibility gas is a carbon monoxide.
5. the production method of super-large diameter anodic phosphorous copper balls according to claim 3; It is characterized in that: described diameter is that the phosphor copper bar of 20mm is admitted to continuous extruder and pushes, and goes out the ultra-fine grain phosphor-copper bar base that the interruption-forming diameter is 30～40mm at extrusion chamber.
6. the production method of super-large diameter anodic phosphorous copper balls according to claim 5 is characterized in that: described diameter be the ultra-fine grain phosphor-copper bar base of 30～40mm through high-power ball cold header former and formpiston matched moulds, moulding obtains the phosphorous copper balls of diameter 55mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101167794A CN102615482A (en) | 2012-04-20 | 2012-04-20 | Production method of oversized-diameter anode phosphorus copper ball |
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| CN2012101167794A CN102615482A (en) | 2012-04-20 | 2012-04-20 | Production method of oversized-diameter anode phosphorus copper ball |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103722350A (en) * | 2014-01-14 | 2014-04-16 | 东又悦（苏州）电子科技新材料有限公司 | Electroplating hollow phosphor copper ball and preparation method thereof |
| CN103741197A (en) * | 2013-12-14 | 2014-04-23 | 金川集团股份有限公司 | Production method of phosphor copper ball for electroplating |
| CN103849909A (en) * | 2014-02-26 | 2014-06-11 | 东又悦（苏州）电子科技新材料有限公司 | Phosphor copper ball with grooves at surface and preparation method thereof |
| CN105112695A (en) * | 2015-08-19 | 2015-12-02 | 赵人刚 | Control method of content of impurities in phosphor copper balls and production method of phosphor copper balls |
| CN106381410A (en) * | 2016-11-28 | 2017-02-08 | 佛山市承安铜业有限公司 | Method, smelting furnace and system for preparing phosphor-copper anode for integrated circuit |
| CN108393418A (en) * | 2018-03-29 | 2018-08-14 | 浙江天马轴承有限公司 | A kind of manufacturing method promoting bearing steel ball surface performance |
| CN114226842A (en) * | 2021-11-10 | 2022-03-25 | 铜陵有色股份铜冠电工有限公司 | Super large scale anode phosphorus copper ball straight rod plate circle shearing mechanism |
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| JPH11286732A (en) * | 1998-04-01 | 1999-10-19 | Mitsui Mining & Smelting Co Ltd | Manufacture of alumina-dispersed strengthened copper |
| CN1603063A (en) * | 2004-11-09 | 2005-04-06 | 广东南方特种铜材有限公司 | Method for preparing anode copper ball and apparatus thereof |
| CN101067174A (en) * | 2007-06-13 | 2007-11-07 | 刘显模 | Method for producing phosphor-copper alloy bar |
| CN101698271A (en) * | 2009-10-12 | 2010-04-28 | 東又悦（蘇州）電子科技新材料有限公司 | Method for processing high-efficiency high-density phosphorus copper balls |
| JP2010189678A (en) * | 2009-02-16 | 2010-09-02 | Mitsubishi Materials Corp | Cr-containing copper alloy wire, and method for producing the same |
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2012
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Patent Citations (5)
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| JPH11286732A (en) * | 1998-04-01 | 1999-10-19 | Mitsui Mining & Smelting Co Ltd | Manufacture of alumina-dispersed strengthened copper |
| CN1603063A (en) * | 2004-11-09 | 2005-04-06 | 广东南方特种铜材有限公司 | Method for preparing anode copper ball and apparatus thereof |
| CN101067174A (en) * | 2007-06-13 | 2007-11-07 | 刘显模 | Method for producing phosphor-copper alloy bar |
| JP2010189678A (en) * | 2009-02-16 | 2010-09-02 | Mitsubishi Materials Corp | Cr-containing copper alloy wire, and method for producing the same |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741197A (en) * | 2013-12-14 | 2014-04-23 | 金川集团股份有限公司 | Production method of phosphor copper ball for electroplating |
| CN103722350A (en) * | 2014-01-14 | 2014-04-16 | 东又悦（苏州）电子科技新材料有限公司 | Electroplating hollow phosphor copper ball and preparation method thereof |
| CN103722350B (en) * | 2014-01-14 | 2016-08-10 | 东又悦（苏州）电子科技新材料有限公司 | A kind of plating hollow phosphorous copper balls and preparation method thereof |
| CN103849909A (en) * | 2014-02-26 | 2014-06-11 | 东又悦（苏州）电子科技新材料有限公司 | Phosphor copper ball with grooves at surface and preparation method thereof |
| CN103849909B (en) * | 2014-02-26 | 2017-01-04 | 东又悦（苏州）电子科技新材料有限公司 | A kind of surface has the preparation method of reeded phosphorous copper balls |
| CN105112695A (en) * | 2015-08-19 | 2015-12-02 | 赵人刚 | Control method of content of impurities in phosphor copper balls and production method of phosphor copper balls |
| CN106381410A (en) * | 2016-11-28 | 2017-02-08 | 佛山市承安铜业有限公司 | Method, smelting furnace and system for preparing phosphor-copper anode for integrated circuit |
| CN106381410B (en) * | 2016-11-28 | 2019-01-22 | 佛山市承安铜业有限公司 | A kind of preparation method and its system of phosphorus-copper anode for integrated circuit |
| CN108393418A (en) * | 2018-03-29 | 2018-08-14 | 浙江天马轴承有限公司 | A kind of manufacturing method promoting bearing steel ball surface performance |
| CN108393418B (en) * | 2018-03-29 | 2020-04-07 | 浙江天马轴承有限公司 | Manufacturing method for improving surface layer performance of bearing steel ball |
| CN114226842A (en) * | 2021-11-10 | 2022-03-25 | 铜陵有色股份铜冠电工有限公司 | Super large scale anode phosphorus copper ball straight rod plate circle shearing mechanism |
| CN114226842B (en) * | 2021-11-10 | 2024-05-14 | 铜陵有色股份铜冠电工有限公司 | Super-large-scale anode phosphor copper ball straight rod disc shearing device |
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Application publication date: 20120801 |