CN101944674B - Manufacturing method of copper-aluminum composite terminal and composite terminal manufactured thereby - Google Patents
Manufacturing method of copper-aluminum composite terminal and composite terminal manufactured thereby Download PDFInfo
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- CN101944674B CN101944674B CN2010102436750A CN201010243675A CN101944674B CN 101944674 B CN101944674 B CN 101944674B CN 2010102436750 A CN2010102436750 A CN 2010102436750A CN 201010243675 A CN201010243675 A CN 201010243675A CN 101944674 B CN101944674 B CN 101944674B
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Abstract
The invention belongs to the technical field of connecting terminals and relates to a manufacturing method of a copper-aluminum composite terminal and the composite terminal manufactured thereby. The manufacturing method comprises the steps of preparing materials, punching the materials, punching a fixed mounting hole of a conducting wire, turning a round corner, press-molding, finishing, punching, coating a protective agent, coating electric force compounded grease and the like; and the copper-aluminum composite terminal manufactured by the method comprises the cylindrical end and the flat end which are mutually connected, and each end consists of an aluminum layer and a copper layer stuck on the aluminum layer, thereby effectively solving the shortcomings and the defects of easy rupture and easy corrosion in a copper-aluminum solder terminal in the prior art and improving the overall quality of the copper-aluminum composite terminal.
Description
Technical field:
The invention belongs to the splicing ear technical field, especially refer to the preparation method of the compound terminal of a kind of copper aluminium, also relate to the compound terminal of copper aluminium by this method preparation.
Background technology:
Along with the continuous development of electric utility, arrangements of electric connection use amounts such as electric connection terminal increase considerably, and the quality of electric connecting terminal protonatomic mass directly relates to the safety of electric power system and apparatus.The terminals of existing most of equipment are processed by copper product, and mostly lead is that aluminum processes, and also adopts copper aluminium splicing ear mostly so have electric connection terminal now.But it is unreasonable that existing splicing ear structure is provided with, and has many potential safety hazards.Docked through friction welding with aluminum strip by copper bar like existing splicing ear and to form, like this, it is little that copper aluminium connects edged surface; Contact-making surface resistance can be very big; In long-term use, when equipment operation, overload or short circuit, can heat up rapidly in copper aluminium junction; Gently then burn contact, phase-deficient operation causes power outage, heavy then cause burning apparatus, cause equipment explosion, fire etc.In addition, at present weld horizontal can not be flawless, and its place, slit receives the influence of air, moisture, and the oxidation chance takes place to be increased greatly, and contact-making surface resistance is further increased, and finally cause copper-aluminium transition joint generation intensity decreases and rupture.So existing splicing ear has the necessity and the space of the improvement of anxious palpus.
Summary of the invention:
One of the object of the invention is to be defective that overcomes prior art and deficiency, and the preparation method of the compound terminal of a kind of copper aluminium is provided, and the compound terminal structure of obtained copper aluminium is reasonable, and copper aluminium contact-making surface is big, and conductive effect is good, and is not easy fracture.
Another object of the present invention provides by the compound terminal product of the prepared copper aluminium of said method.
For realizing the present invention's purpose, adopt following technical scheme:
The preparation method of the compound terminal of a kind of copper aluminium of the present invention, it may further comprise the steps:
(1) material is prepared: select to prepare the compound solid bar of copper cover aluminum bimetallic, requiring the bonding rate of copper aluminium is more than 85%;
(2) dash material: use punch press that the compound solid bar punching of the said copper cover aluminum bimetallic of step is become the unit processing bar of some length as L;
(3) punching press lead fixed installing hole: earlier the lower end of the described unit processing of step bar is fixed on the counterdie of diel, and is made unit processing bar be vertical state; Process the upper end end face of bar again with the upper punch pin punching unit of diel, the diameter of said upper punch pin is less than the diameter of unit processing bar; Under the effect of upper punch pin, processing bar upper end end face forms a lead fixed installing hole in the unit, and the depth H of said lead fixed installing hole is less than the length L of unit processing bar;
(4) car fillet: through automatic lathe or numerically controlled lathe to lead fixed installing hole aperture car fillet; Get the semi-finished product terminal through this step, said semi-finished product terminal comprises solid-end and the tubular end that is provided with the lead fixed installing hole;
(5) molded: through friction press the solid-end of semi-finished product terminal is pressed into inclined to one side flush end, the compacting deformation rate is less than 50%;
(6), the said inclined to one side flush end of step is repaired and towards fixing hole through the edge-cutting and hole-punching compound die;
(7) connect to sew at copper aluminium and be coated with protective agent;
(8) at room temperature after the drying, in tubular end inner lead fixed installation hole, smear electric force compounded grease, the compound terminal of finished product copper aluminium.
The present invention selects for use the compound solid bar of copper cover aluminum bimetallic as original material, and behind this processing step, the compound terminal of gained copper aluminium is formed by copper cover aluminum, has increased the contact area of copper aluminium effectively, greatly reduces the resistance of copper aluminium contact-making surface.
Further, the compound solid bar of copper cover aluminum bimetallic in the said step (1), its copper layer thickness is equal to, or greater than 0.5mm.The thickness of copper layer directly influences final products electric conductivity of the present invention, if too thin, final products of the present invention are poor electric conductivity but also when crimping not only, and the copper layer on surface ruptures easily.
Further, in step (3) before, increase unit processing bar surfaces coated copper aluminium drawing oil step.Increase the drawing effect of unit processing bar in punching course effectively, and used the technical process demoulding convenient.
Further, in step (3), said upper punch pin is concentric setting with unit processing bar.With the thickness one that guarantees tubular end barrel to.
Wherein, in step (7), said protective agent is resistant to elevated temperatures waterborne organic silicon self-drying paint.Can reduce the contact of contact-making surface with air, improve corrosion resistance, like this, the anti-fracture energy of the final compound terminal of producing of copper aluminium increases.
In addition, by the compound terminal of copper aluminium that above-mentioned said preparation method makes, it comprises interconnective tubular end and inclined to one side flush end; Tubular end and inclined to one side flush end are formed by aluminium lamination and the copper layer of sticking card on aluminium lamination; Be provided with the lead fixed installing hole in the said tubular end; Said inclined to one side flush end is provided with fixing hole.
The present invention has increased copper aluminium contact area effectively, has reduced the resistance of copper aluminium contact-making surface, improves the general safety performance of the compound terminal of copper aluminium; Simultaneously, reduced air and the chance that copper aluminium contact position contacts, reduced oxidized risk, improved the tensile strength of product, thereby improved the overall performance of existing product greatly.
Description of drawings:
Fig. 1 dashes the material sketch map for step 2 of the present invention;
Fig. 2 is step 3 a punching press lead fixed installing hole sketch map of the present invention;
Fig. 3 is a semi-finished product terminal structure sketch map of the present invention;
Fig. 4 is the molded sketch map of step 5 of the present invention;
Fig. 5 is step 6 an edge-cutting and hole-punching sketch map of the present invention;
Fig. 6 is the compound terminal structure sketch map of finished product copper aluminium of the present invention.
Reference numeral: 2, punch press, 3, the counterdie of diel, 4, upper punch pin 5, solid-end, 6, the tubular end; 7, friction press, 8, the edge-cutting and hole-punching compound die, 9, fixing hole, 10, unit processing bar; 11, copper layer, 12, aluminium lamination, 13, the lead fixed installing hole; 20, semi-finished product terminal, 30, the compound terminal of copper aluminium, 51, flush end partially.
Embodiment:
Understand the present invention better for ease of those skilled in the art,, further set forth the present invention below in conjunction with embodiment:
The preparation method of the compound terminal of a kind of copper aluminium of the present invention, its concrete steps are following successively:
The first step is selected to prepare the compound solid bar of copper cover aluminum bimetallic, and the compound solid bar of this copper cover aluminum bimetallic can obtain through market purchasing; Specific requirement is: A, the bonding rate of copper aluminium are more than 85%; It has directly determined the electric conductivity and the yields of the final compound terminal of finished product copper aluminium, and is too low like the bonding rate of copper aluminium, the compound terminal conduction of final finished product copper aluminium rate variance; Simultaneously in the course of processing, the phenomenon that the copper aluminium lamination is separated may occur, cause yields to descend; B, require copper layer 11 thickness more than 0.5mm, the thickness of copper layer 11 directly influences final products electric conductivity of the present invention, if too thin, final products of the present invention are poor electric conductivity not only, and when crimping, the copper layer on surface ruptures easily.
Second step; As shown in Figure 1, the compound solid bar of exactly first step being selected for use of copper cover aluminum bimetallic dashes material processing, specifically; Use the compound solid bar punching of punch press 2 copper cover aluminum bimetallics to become the unit processing bar 10 of some length exactly as L; Major requirement is to dash material accurately, guarantees that as far as possible each unit processing bar 10 length is consistent, and both ends of the surface are smooth.
The 3rd step, as shown in Figure 2, with being coated with copper aluminium drawing oil on said unit processing of second step bar 10 surfaces coated, then the unit is processed bar 10 lower ends and be fixed on the counterdie 3 of diel earlier, and make unit processing bar 10 be vertical state; Process the upper end end face of bar 10 again with upper punch pin 4 punching units of diel.The diameter d of said upper punch pin 4 is less than the diameter D of unit processing bar 10, so that processing bar 10 upper end end faces effectively form fixed installation hole 13 in the unit.Specifically in the process of upper punch pin 4 squeeze unit processing bar 10 upper end end faces; Upper punch pin 4 peripheral aluminium laminations 12 of extruding and copper layer 11 are toward the motion of die sleeve wall; After receiving the resistance of die sleeve wall, aluminium lamination 12 and copper layer 11 upwards stretch simultaneously and move, and form lead fixed installing hole 13.Upper punch pin 4 like this, in extrusion process, can guarantee that tubular end 6 barrel thickness are even when processing bar 10 concentric settings with the unit.
The depth H of lead fixed installing hole 13 is less than the length L of unit processing bar 10.Lead fixed installing hole 13 is mainly used in the connection lead, can be located at fixed installation hole 13 by lead, presses hexagonal with fixing cord then.
The 4th step to tubular end 6 lead fixed installing holes 13 aperture car fillets, got semi-finished product terminal 20 through this step through automatic lathe or numerically controlled lathe, and said semi-finished product terminal 20 comprises solid-end 5 and tubular end 6, and is as shown in Figure 3.
In the 5th step, as shown in Figure 4, the solid-end 5 through 7 pairs of semi-finished product terminals 20 of friction press is pressed into inclined to one side flush end 51, and the compacting deformation rate is less than 50%, if because press De Taili evil, surperficial copper layer 11 easy of crack.
The 6th step, as shown in Figure 5, through edge-cutting and hole-punching compound die 8, said inclined to one side flush end 51 of the 5th step is repaired and towards fixing hole 9; Fixing hole 9 is mainly used in the compound terminal of finished product copper aluminium is fixed on equipment or the switch.
The 7th goes on foot, and connects to sew at copper aluminium to be coated with protective agent; Said protective agent is resistant to elevated temperatures waterborne organic silicon self-drying paint.It mainly acts on the junction that is sealed copper layer 11 and aluminium lamination 12, to prevent the avoiding junction fully to contact with air, reduces the possibility of the oxidized corrosion in junction of copper layer 11 and aluminium lamination 12, has improved the tensile property of the compound terminal of finished product copper aluminium effectively.
The 8th step, in room temperature or be heated under the uniform temperature after the drying, in tubular end 6 inner leads fixed installation hole 13, smear electric force compounded grease, the compound terminal 30 of finished product copper aluminium.As shown in Figure 6.
As shown in Figure 6, be the compound terminal 30 of copper aluminium by the prepared invention product of foregoing invention method, it comprises interconnective tubular end 6 and inclined to one side flush end 51; Tubular end 6 and inclined to one side flush end 51 are formed by aluminium lamination 12 and the copper layer 11 of sticking card on aluminium lamination 12; Be provided with fixed installation hole 13 in the said tubular end 6; Said inclined to one side flush end 51 is provided with fixing hole 9.
The above only is a preferred embodiments of the present invention, so all equivalences of doing according to the described structure of patent claim of the present invention, characteristic and principle change or modify, includes in patent claim of the present invention.
Claims (6)
1. the preparation method of the compound terminal of copper aluminium, it is characterized in that: it may further comprise the steps:
(1) material is prepared: select to prepare the compound solid bar of copper cover aluminum bimetallic, requiring the bonding rate of copper aluminium is more than 85%;
(2) dash material: with punch press (2) the compound solid bar punching of the said copper cover aluminum bimetallic of step (1) being become some length is the unit processing bar (10) of L;
(3) punching press lead fixed installing hole: earlier the lower end of the described unit processing bar of step (2) (10) is fixed on the counterdie (3) of diel, and is made unit processing bar (10) be vertical state; Use the upper end end face of upper punch pin (4) the punching unit processing bar (10) of diel again, the diameter d of said upper punch pin (4) is processed the diameter D of bar (10) less than the unit; Under the effect of upper punch pin (4), end face forms a lead fixed installing hole (13) in unit processing bar (10) upper end, and the depth H of said lead fixed installing hole (13) is processed the length L of bar (10) less than the unit;
(4) car fillet: through automatic lathe or numerically controlled lathe to lead fixed installing hole (13) aperture car fillet; Get semi-finished product terminal (20) through this step, said semi-finished product terminal (20) comprises solid-end (5) and the tubular end (6) that is provided with lead fixed installing hole (13);
(5) molded: through friction press (7) solid-end (5) of semi-finished product terminal (20) is pressed into inclined to one side flush end (51), the compacting deformation rate is less than 50%;
(6), the said inclined to one side flush end of step (5) (51) is repaired and towards fixing hole (9) through edge-cutting and hole-punching compound die (8);
(7) connect to sew at copper aluminium and be coated with protective agent;
(8) at room temperature after the drying, in tubular end (6) inner lead fixed installation hole (13), smear electric force compounded grease, the compound terminal of finished product copper aluminium (30).
2. preparation method according to claim 1 is characterized in that: the compound solid bar of copper cover aluminum bimetallic in the said step (1), its copper layer thickness is equal to, or greater than 0.5mm.
3. preparation method according to claim 1 is characterized in that: in step (3) before, increase unit processing bar (10) surfaces coated copper aluminium drawing oil step.
4. preparation method according to claim 1 is characterized in that: in step (3), said upper punch pin (4) is concentric setting with unit processing bar (10).
5. preparation method according to claim 1 is characterized in that: in step (7), said protective agent is resistant to elevated temperatures waterborne organic silicon self-drying paint.
6. the compound terminal of copper aluminium that preparation method according to claim 1 makes is characterized in that: it comprises interconnective tubular end (6) and inclined to one side flush end (51); Tubular end (6) and inclined to one side flush end (51) are formed by aluminium lamination (12) and the copper layer (11) of sticking card on aluminium lamination (12); Be provided with lead fixed installing hole (13) in the said tubular end (6); Said inclined to one side flush end (51) is provided with fixing hole (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102436750A CN101944674B (en) | 2010-08-03 | 2010-08-03 | Manufacturing method of copper-aluminum composite terminal and composite terminal manufactured thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102436750A CN101944674B (en) | 2010-08-03 | 2010-08-03 | Manufacturing method of copper-aluminum composite terminal and composite terminal manufactured thereby |
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| Publication Number | Publication Date |
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| CN101944674A CN101944674A (en) | 2011-01-12 |
| CN101944674B true CN101944674B (en) | 2012-08-22 |
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| CN2010102436750A Expired - Fee Related CN101944674B (en) | 2010-08-03 | 2010-08-03 | Manufacturing method of copper-aluminum composite terminal and composite terminal manufactured thereby |
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| CN104607883B (en) * | 2015-02-13 | 2019-08-09 | 乐清市恒通电气有限公司 | A kind of lock pin manufacturing process of industrial plug |
| CN104882767B (en) * | 2015-05-30 | 2017-04-12 | 苏州云龙精密成形有限公司 | Cold extruding process of high-speed rail electrical connector pin |
| CN108987962B (en) * | 2017-06-05 | 2021-12-03 | 日立金属株式会社 | Crimp terminal, electric wire with terminal, and method for manufacturing electric wire with terminal |
| CN108400511B (en) * | 2018-02-02 | 2020-10-30 | 江西普拉格电子制品有限公司 | Plug pin sequencing device |
| CN108390232A (en) * | 2018-02-02 | 2018-08-10 | 江西普拉格电子制品有限公司 | Perforating device and drilling method |
| CN108390233A (en) * | 2018-02-02 | 2018-08-10 | 江西普拉格电子制品有限公司 | Pressure setting, semi-finished products foot and its drawing method |
| CN108448366B (en) * | 2018-02-08 | 2020-03-20 | 烟台孚信达双金属股份有限公司 | Production process of copper-aluminum transition wiring terminal with limiting constraint condition |
| CN108493735B (en) * | 2018-03-28 | 2019-08-27 | 江西杰洋科技有限公司 | A kind of compound connecting terminal preparation method of aluminium alloy high pressure cable aluminum bronze |
| CN108767622B (en) * | 2018-06-04 | 2019-12-10 | 朋友电力科技有限公司 | Preparation process of connector convenient for installing and replacing lead and equipment conversion |
| CN111585143B (en) * | 2020-05-28 | 2021-03-30 | 永固集团股份有限公司 | Punch forming equipment and punch method for wiring terminal |
| CN112186377A (en) * | 2020-09-30 | 2021-01-05 | 北京盈海通电气设备有限公司 | Copper-aluminum composite wire nose and preparation method thereof |
| CN116937285B (en) * | 2023-07-24 | 2024-02-13 | 浙江天虹紧固件有限公司 | Pin molding equipment and method thereof |
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| GB872728A (en) * | 1957-08-02 | 1961-07-12 | Erma Ltd | Improvements in terminals for electric conductors |
| CN201146256Y (en) * | 2007-12-19 | 2008-11-05 | 永固集团股份有限公司 | Connection terminal for cuprum aluminum transition |
| CN201188498Y (en) * | 2008-04-24 | 2009-01-28 | 上海嘉盟电力设备有限公司 | Riveting type cuprum aluminum terminal |
| CN201199549Y (en) * | 2008-03-25 | 2009-02-25 | 郑松富 | Cuprum aluminum connection terminal |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5339490A (en) * | 1976-09-24 | 1978-04-11 | Furukawa Electric Co Ltd:The | Production method of solderless terminal for aluminum conductor |
| JP2003229192A (en) * | 2002-02-05 | 2003-08-15 | Auto Network Gijutsu Kenkyusho:Kk | Terminal structure of aluminum wire preventing electric corrosion |
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2010
- 2010-08-03 CN CN2010102436750A patent/CN101944674B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB872728A (en) * | 1957-08-02 | 1961-07-12 | Erma Ltd | Improvements in terminals for electric conductors |
| CN201146256Y (en) * | 2007-12-19 | 2008-11-05 | 永固集团股份有限公司 | Connection terminal for cuprum aluminum transition |
| CN201199549Y (en) * | 2008-03-25 | 2009-02-25 | 郑松富 | Cuprum aluminum connection terminal |
| CN201188498Y (en) * | 2008-04-24 | 2009-01-28 | 上海嘉盟电力设备有限公司 | Riveting type cuprum aluminum terminal |
Non-Patent Citations (2)
| Title |
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| JP昭53-39490A 1978.04.11 |
| JP特开2003-229192A 2003.08.15 |
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| CN101944674A (en) | 2011-01-12 |
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Address after: 315504 No. 128, Song Yang Road, Fenghua hi tech Industrial Park, Zhejiang, China Applicant after: FENGXIN ELECTRICAL TECHNOLOGY CO., LTD. Co-applicant after: Zhoushan Power Authority, Zhejiang Electric Power Corporation Address before: 315500 private science and Technology Park (Jiangkou), Zhejiang, Fenghua Province Applicant before: Ningbo Fengxin Electric Power Fitting Co., Ltd. Co-applicant before: Zhoushan Power Authority, Zhejiang Electric Power Corporation |
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