CN106342011B - The welding method of a kind of stranded copper wire wire harness and silver foil - Google Patents
The welding method of a kind of stranded copper wire wire harness and silver foilInfo
- Publication number
- CN106342011B CN106342011B CN201010050528.1A CN201010050528A CN106342011B CN 106342011 B CN106342011 B CN 106342011B CN 201010050528 A CN201010050528 A CN 201010050528A CN 106342011 B CN106342011 B CN 106342011B
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- China
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- copper wire
- wire harness
- stranded copper
- welding
- silver foil
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Abstract
The invention discloses the welding method of a kind of stranded copper wire line and silver foil, first the copper wire wire harness termination with insulating barrier is removed to the insulating barrier of certain length, expose stranded copper wire wire harness, stranded copper wire wire harness is stretched in the thermocompression bonding mould being formed by fixing side and live metal piece, utilize the Fast Heating of radio-frequency induction coil, fix side and live metal piece move toward one another, by the pressure welding of stranded copper wire wire harness and shaping simultaneously; Subsequently the stranded copper wire wire harness of pressure welding and shaping and silver foil are carried out to parallel microgap resistance spot welding. The plumbous soft soldering method of the alternative traditional tin of the present invention, and solve direct employing resistance spot welding while welding, stranded copper wire bunch state under pressure is inconsistent, is prone to the problems such as welding current distribution is inconsistent, monofilament lines easy fracture, solder joint mechanical property is low, Joint Reliability is low.
Description
Technical field
The invention belongs to welding field, relate to the welding method of a kind of stranded copper wire wire harness and silver foil, particularlySay and relate to a kind of utilize Fast Heating and power time effect, make multiply silver-plated copper silk thread produce Plastic FormingAnd carry out the connection between silk thread simultaneously, adopt subsequently parallel microgap resistance spot welding by the copper wire line and the silver foil that are shapedThe method linking together.
Background technology
In electrical connection field, relate generally to being connected of wire and tinsel, this jointing is except risingOutside electrical connection effect, need to bear certain load toward contact, as temperature loading, static(al) and dynamic stressLoad etc., therefore, butt joint mechanical property has proposed high reliability request equally. Particularly in space technologyField, due to the complexity of environment, as the significantly alternation of ray, temperature etc., these environmental factors dockingPerformance has also proposed high-quality, high reliability request. For this kind of joint form, traditional welding meansFor solder, generally adopt tin-lead solder, and in order to improve the wetability of mother metal, conventionally at copper conductor tableFace is silver-plated.
But there is following drawback in this welding method: add because this kind of joint solder utilizes electric iron conventionallyHeat also adopts manual operations, and welding quality uniformity and reliability are difficult to be guaranteed; In addition tin-lead solder,Be limited to the feature that the material property under its fusion temperature, high low temperature worsens, the operating temperature range of joint is limited.This is unfavorable for that it uses under complicated and extreme condition, particularly in space environment, and as solar battery array,Its working environment has determined that joint need to bear the variations in temperature of positive and negative more than 100 degree, often holds under this environmentEasily cause joint fails,
Parallel microgap resistance spot welding is the one of Pressure Welding, and in welding process, wire and silver foil are at twoUnder the pressure of parallel pole, fit tightly, and pass to transient high-current, do at the pulse high current that flows through welding zoneWith under, welding region heat production, simultaneously under electrode pressure, weldment generation plastic deformation, thus make twoClose contact fusing between clean metal covering, form nugget realization and connect. Because welding process is without low melting pointSolder adds, and nugget microstructure is silver-bearing copper eutectic structure, all has taking Ag and Cu as the solid solution of baseHigh plasticity, intensity, anti-fatigue performance, this makes solder joint comprehensive mechanical property greatly be better than tin lead solder.But due to the stranded copper wire wire harness that one of connecting object is minor diameter, sub-thread copper wire linear diameter is very little, asConventional 0.8mm diameter copper wire line is 19 strands, and sub-thread copper wire line is easy to fracture in pinpoint welding procedure; ThisOutward, mother metal shape, fit-state etc. are very big to welding current assignment affects in resistance spot welding process, separateThe stranded copper wire line of state is often different conditions on silver foil surface and spreads out under electrode pressure, makes on the one handEach welded condition is inconsistent, and the copper wire line disperseing on the other hand often causes hot-spot, void in the time of spot weldingThe problems such as weldering.
Summary of the invention
For the above-mentioned deficiency of prior art, technical problem to be solved by this invention is to provide a kind of multiply copperThe highly reliable welding method of silk thread bundle and silver foil, the method can complete welding process by twice welding, solder jointBe shaped attractive in appearance, mechanical property is excellent, solder joint high conformity.
The present invention is that to solve the technical scheme that adopts of its technical problem as follows: a kind of stranded copper wire wire harness (Wire, lower same) complete in two steps with the welding method of silver foil, first carry out the preshaped of stranded conductorWith welding, then by the stranded copper wire wire harness that is configured as flat and link together, by parallel microgap electricityResistance spot welding method, is connected with silver foil, specifically comprises the steps: first by the copper wire line with insulating barrierShu Duantou removes the insulating barrier of certain length, exposes stranded copper wire line, and stranded copper wire line is stretched into by fixation sideIn the thermocompression bonding mould of limit and live metal piece composition, utilize the Fast Heating of radio-frequency induction coil, live simultaneouslyMoving metal derby move toward one another, by the pressure welding of stranded copper wire wire harness and shaping; Subsequently by the multiply copper of pressure welding and shapingSilk thread bundle carries out parallel microgap resistance spot welding with silver foil.
Preferably, in the welding method of the above-mentioned stranded copper wire wire harness of the present invention and silver foil, copper wire wire harness is silver-platedState, every synnema strand count >=19 strand, silver foil thickness is less than or equal to 50 μ m.
Preferably, in the welding method of the above-mentioned stranded copper wire wire harness of the present invention and silver foil, enter radio-frequency induction coilThe stranded copper wire wire harness length of circle heating region is less than or equal to 10mm, and stranded copper wire wire harness insulating barrier port is with highFrequently the distance of induction coil is less than or equal to 5mm, and the heat time is between 3-6s.
Preferably, in the welding method of the above-mentioned stranded copper wire wire harness of the present invention and silver foil, parallel microgap point of resistanceThe weldingvoltage of weldering is 1.5-2.5V, and welding pressure is 15-40N, and electrode gap is 0.1-0.2mm.
Preferably, in the welding method of the above-mentioned stranded copper wire wire harness of the present invention and silver foil, parallel microgap point of resistanceWhen weldering, the number of welds of stranded copper wire wire harness and silver foil jointing is more than or equal to 3, and spot pitch is less than etc.In 0.8mm.
With respect to prior art, the present invention, by preshaped stranded copper wire wire harness and welding, has ensured on the one handFitting tightly and being reliably connected between copper wire line, favourable to its electric conductivity; On the other hand, preshapedWith the bundle conductor welding together, its postwelding is flat, and under mould, is shaped and welding, its shapeUniformity, welding quality consistent performance access guarantee. In the parallel clearance resistance spot welding of carrying out subsequently, pre-First connect into overall flat wire harness and can not scatter under electrode pressure, also there will not be single copper wire line to existThe phenomenon being easily pressed down under electrode pressure. There is good the connecing of larger area this external beam bottom with silver foilTouch, like this in when welding, ensured the uniformity that solder joint electric current distributes, that can greatly improve quality of welding spot canLean on property and mechanical property. The invention solves in prior art while directly adopting resistance spot welding to weld, manyStrand copper wire bunch state under pressure is inconsistent, be prone to welding current distribute inconsistent, monofilament lines easy fracture,The problems such as solder joint mechanical property is low, Joint Reliability is low.
Brief description of the drawings
Fig. 1 is copper wire wire harness heat ductile forming and thermocompression bonding schematic diagram.
Fig. 2 is silver foil and the parallel microgap resistance spot welding schematic diagram of wire.
Wherein: 1 is wire (stranded copper wire wire harness); 2 is insulating barrier; 3 is radio-frequency induction coil; 4 areBed die (live metal piece); 5 is mold (live metal piece); 6 is electrode; 7 is insulating barrier; 8For silver foil; 9 is substrate;
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, further set forth the present invention. These embodiment are only interpreted asBe used for the present invention is described and be not used in and limit the scope of the invention. Reading the content that the present invention recordsAfterwards, those skilled in the art can make various changes or modifications the present invention, and these equivalences change and modifyFall into equally the scope of the claims in the present invention.
In the stranded copper wire line that the preferred embodiment of the present invention provides and the welding method of silver foil, be illustrated in figure 1The pretreatment stage of wire and silver foil welding, its objective is and avoid in the time carrying out resistance spot welding, stranded copper wire lineScatter, cause the problems such as single wire fracture, local rosin joint, hot-spot. At the pre-place of this shaping and weldingIn the reason stage, mold 5, carries out in opposite directions with bed die 4 in the Fast Heating of radio-frequency induction coil 3Motion, carries out inner bundle conductor to push under heated condition, and copper wire line at high temperature plasticity is good, andThe silver coating of wire surface at high temperature, by forming compared with the eutectic structure of low melting point with copper matrix, easily makes wireBetween realize good connection. The contained effect of mould will ensure the shaping form uniformity of copper wire wire harness, high frequencyThe Fast Heating feature of induction coil has also ensured the intact of line end rear portion insulating barrier.
Carrying out after heat ductile forming and thermocompression bonding, obtaining and be connected and the conducting wire end of shape criteria,Subsequently by silver foil with anticipate after wire carry out parallel microgap resistance spot welding welding. Fig. 2 has provided silver foilParallel microgap resistance spot welding process with wire. Electrode 6 moves downward and wire 1 Surface Contact, and appliesPressure, the gap between two electrodes is separated by insulating barrier 7, applies high-melting-point with high hard at the back side of silver foil 8The substrate 9 of degree, can avoid welded together to silver foil and substrate. When silver foil 8 and the pressure of wire 1 at electrode 6Under power, after close contact, pass to transient pulse electric current between two parallel poles, the interface of wire and silver foil is at electricityUnder thermal resistance and electrode pressure, form nugget, obtain and connect. Because solder joint area is less, each wire and silver foilResistance spot welding solder joint can realize solder joint linkage interface bearing capacity 3 left and right and be greater than mother metal.
The stranded copper wire line that following examples of the present invention provide and the welding method of silver foil divide two as shown in Figure 1-2Walk:
Embodiment 1
19 strands of silver-gilt copper wire wire harness, diameter 0.8mm, silver foil thickness 50 μ m, wire pretreatment heat time3s, conductor width 2.5mm after pretreatment, parallel microgap resistance spot welding voltage 2.0V, weld interval 0.1s,Electrode pressure 20N, joint comprises 3 solder joints, after measured, postwelding joint pull-off force is 55.25N.
Embodiment 2
19 strands of silver-gilt copper wire wire harness, diameter 0.8mm, silver foil thickness 50 μ m, wire pretreatment heat time3s, conductor width 2.5mm after pretreatment, parallel microgap resistance spot welding voltage 1.5V, weld interval 0.1s,Electrode pressure 15N, joint comprises 3 solder joints, after measured, postwelding joint pull-off force is 50.46N.
Embodiment 3
19 strands of silver-gilt copper wire wire harness, diameter 0.8mm, silver foil thickness 50 μ m, wire pretreatment heat time3s, conductor width 2.5mm after pretreatment, parallel microgap resistance spot welding voltage 2.0V, weld interval 0.1s,Electrode pressure 25N, joint comprises 3 solder joints, after measured, postwelding joint pull-off force is 52.40N.
Embodiment 4
19 strands of silver-gilt copper wire wire harness, diameter 0.8mm, silver foil thickness 50 μ m, wire pretreatment heat time3s, conductor width 2.5mm after pretreatment, parallel microgap resistance spot welding voltage 2.0V, weld interval 0.05s,Electrode pressure 25N, joint comprises 3 solder joints, after measured, postwelding joint pull-off force is 54.28N.
Embodiment 5
19 strands of silver-gilt copper wire wire harness, diameter 0.8mm, silver foil thickness 50 μ m, wire pretreatment heat time3s, conductor width 2.5mm after pretreatment, parallel microgap resistance spot welding voltage 2.0V, weld interval 0.05s,Electrode pressure 30N, joint comprises 3 solder joints, after measured, postwelding joint pull-off force is 56.70N.
Embodiment 6
19 strands of silver-gilt copper wire wire harness, diameter 0.8mm, silver foil thickness 50 μ m, wire pretreatment heat time3s, conductor width 2.5mm after pretreatment, parallel microgap resistance spot welding voltage 2.5V, weld interval 0.012s,Electrode pressure 20N, joint comprises 3 solder joints, after measured, postwelding joint pull-off force is 55.40N.
Claims (5)
1. a welding method for stranded copper wire wire harness and silver foil, is characterized in that: first will be with insulating barrierCopper wire wire harness termination remove the insulating barrier of certain length, expose stranded copper wire wire harness, by stranded copper wireWire harness stretches in the thermocompression bonding mould being made up of fixing side and live metal piece, utilizes radio-frequency induction coilThe Fast Heating of circle, live metal piece move toward one another simultaneously, by the pressure welding of stranded copper wire wire harness and shaping; WithAfter the stranded copper wire wire harness of pressure welding and shaping and silver foil are carried out to parallel microgap resistance spot welding.
2. the welding method of stranded copper wire wire harness according to claim 1 and silver foil, its feature existsIn: copper wire wire harness is silver-plated state, every synnema strand count >=19 strand, silver foil thickness is less than or equal to 50 μ m.
3. the welding method of stranded copper wire wire harness according to claim 1 and silver foil, its feature existsIn: the stranded copper wire wire harness length that enters radio-frequency induction coil heating region is less than or equal to 10mm, multiplyThe distance of copper wire wire harness insulating barrier port and radio-frequency induction coil is less than or equal to 5mm, and the heat time existsBetween 3-6s.
4. the welding method of stranded copper wire wire harness according to claim 1 and silver foil, its feature existsIn: the weldingvoltage of parallel microgap resistance spot welding is 1.5-2.5V, and welding pressure is 15-40N, electrodeGap is 0.1-0.2mm.
5. the welding method of stranded copper wire wire harness according to claim 1 and silver foil, parallel microgapIn resistance spot welding, the number of welds of stranded copper wire wire harness and silver foil jointing is more than or equal to 3, solder jointSpacing is less than or equal to 0.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010050528.1A CN106342011B (en) | 2010-09-30 | 2010-09-30 | The welding method of a kind of stranded copper wire wire harness and silver foil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010050528.1A CN106342011B (en) | 2010-09-30 | 2010-09-30 | The welding method of a kind of stranded copper wire wire harness and silver foil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106342011B true CN106342011B (en) | 2013-08-07 |
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| CN201010050528.1A Active CN106342011B (en) | 2010-09-30 | 2010-09-30 | The welding method of a kind of stranded copper wire wire harness and silver foil |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416847A (en) * | 2018-04-27 | 2019-11-05 | 利萨·德雷克塞迈尔有限责任公司 | The line unit of onboard power system for motor vehicle |
| CN110800068A (en) * | 2017-06-26 | 2020-02-14 | 东京特殊电线株式会社 | Wire for high-frequency coil and electronic component |
| CN115488459A (en) * | 2022-09-15 | 2022-12-20 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Method for improving lumped parameter circulator/isolator central conductor cold joint defect |
-
2010
- 2010-09-30 CN CN201010050528.1A patent/CN106342011B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110800068A (en) * | 2017-06-26 | 2020-02-14 | 东京特殊电线株式会社 | Wire for high-frequency coil and electronic component |
| CN110800068B (en) * | 2017-06-26 | 2021-10-01 | 东京特殊电线株式会社 | Wire for high-frequency coil and electronic component |
| CN110416847A (en) * | 2018-04-27 | 2019-11-05 | 利萨·德雷克塞迈尔有限责任公司 | The line unit of onboard power system for motor vehicle |
| CN110416847B (en) * | 2018-04-27 | 2023-01-13 | 利萨·德雷克塞迈尔有限责任公司 | Circuit arrangement for the onboard power supply of a motor vehicle |
| CN115488459A (en) * | 2022-09-15 | 2022-12-20 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Method for improving lumped parameter circulator/isolator central conductor cold joint defect |
| CN115488459B (en) * | 2022-09-15 | 2024-01-16 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Method for improving center conductor cold joint defect of lumped parameter circulator/isolator |
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| DCSP | Declassification of secret patent |