CN101740987A - Solid-state welding production method of high-performance conducting rod - Google Patents
Solid-state welding production method of high-performance conducting rod Download PDFInfo
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- CN101740987A CN101740987A CN200810232191A CN200810232191A CN101740987A CN 101740987 A CN101740987 A CN 101740987A CN 200810232191 A CN200810232191 A CN 200810232191A CN 200810232191 A CN200810232191 A CN 200810232191A CN 101740987 A CN101740987 A CN 101740987A
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Abstract
The invention discloses a solid-state welding production method of a high-performance conducting rod. The electrical resistivity of a forging aluminum LD2CS welding joint is lowered to be about 8.1*10-8omega.m from 6.7*10-7omega.m during melting, the tensile strength is improved to be about 290 MPa from 186 MPa, the welding process has no interference on silver coatings, and the production efficiency is 10-50 times of that of MIG welding. The invention takes momentum moment or thermal coupling generated by the instant precise weaving of rotary and movable welding pieces as welding energy, so that the method does not need other energy and assistant material consumption, has no pollution and is an efficient energy-saving environmental-friendly industrial technology with good quality. A high voltage power transmission and distribution conducting rod has the following solid-state welding parameters: the friction velocity is 950-1150 rpm, the friction pressure is 16-25 MPa, the friction time is 6-10s, the upsetting force is 75-95 MPa, and the dwell time is 4-8 s; on a friction welder, the joint or the conductor of the conducting rod is tightly clamped in a rotary clamp, a tube is tightly clamped in a movable clamp, and PLC is utilized to realize advanced manufacturing technology operation.
Description
Technical field
The invention belongs to equipment manufacturing technology field, particularly the advanced manufacturing technology of high pressure power transmission and distribution high-performance conducting rod.
Background technology
Conducting rod is in the high pressure power transmission and distribution equipment, in order to transmit the apparatus of the powerful electric current of high-voltage fence bus.Its characteristic feature is, by wrought aluminium LD
2CS joint, body and conductor three parts are formed, and are the electric energy loss (pressure drop is excessive) that reduces in the high-voltage fence running, weld respectively with the body two ends after requiring joint and conductor silver-plated again, and the resistivity of welding point is not more than 3.7 * 10
-7Ω m, hot strength is not less than 270MPa.
Known conducting rod adopts the molten solder moulding.Before the weldering groove with given shape size is processed at joint, conductor and body two ends, adopts Buchholz protection melting (MIG) repeatedly to repeat to weld deposited then.Around here, wrought aluminium LD
2CS has produced local melting, and weld seam is the cast sturcture that has experienced fusing/crystallization process, and density is less, and the metallurgical imperfection of pore and nonmetal inclusion and so on increases.This makes resistivity often greater than 3.7 * 10
-7Ω m; MIG arc center temperature can reach 3 * 10
4More than ℃, this not only makes the burnt structure in the welding point increase, and draws to stretch intensity thereby only have about 186MPa, and makes silver coating and wrought aluminium LD on joint and the conductor
2The CS matrix is peeled off.The energy-saving and cost-reducing high-performance of conducting rod thereby mistake lack.
Summary of the invention
When adopting MIG to make conducting rod in order to overcome, the welding point resistivity of bringing is bigger, and the not high and silver coating of hot strength comes off, and is difficult to give conducting rod energy-saving and cost-reducing drawbacks such as high-performance, the invention provides a kind of solid welding method of high-performance conducting rod.Its concrete technical scheme is: make the rotation of joint or conductor and the interweaving of translation of body satisfy conservation of angular momentum, realize welding by the mechanical friction that produces between joint or conductor and body end face heat and plastic deformation (Thermal-mechanical Coupling).May further comprise the steps:
1) with joint, the flat butt joint of pipe/pipe shape is processed at conductor and body two ends, and joint and conductor is silver-plated.
2) joint or conductor are clamped in the friction-welding machine rolling clamp, and body is clamped in mobile anchor clamps.
3) according to wrought aluminium LD
2The thermophysical property of CS and conducting rod physical dimension are determined friction velocity, friction pressure, rub heating time, welding condition such as upsetting force and retention time thereof via Programmable Logic Controller (PLC), welds together an end of joint or conductor and body.
4) adopt identical welding condition, the other end of joint or conductor and body is welded together.Thereby realize the solid-state welding of high-performance conducting rod.
The invention has the beneficial effects as follows: the Thermal-mechanical Coupling effect of solid-state welding process parameter has determined conducting rod solder side temperature (wrought aluminium LD between 370 ℃～500 ℃
2The fusing point Tm of CS is 630 ℃～655 ℃), thereby wrought aluminium LD during solid-state welding
2CS does not melt, and welding point is the forging tissue that dynamic recrystallization has taken place, and crystal grain is more tiny than the mother metal, and structure is than the densification of mother metal.The resistivity of welding point thereby 6.7 * 10 when welding by MIG
-7Ω m is reduced to 8.1 * 10
-8About Ω m, hot strength is brought up to 290MPa by 186MPa; The silver coating of butt joint of solid-state welding termination process and conductor does not have interference, thereby has guaranteed the high-performance of conducting rod; Because solid-state welding be with rotation and straight-line weldment in the moment of momentum of the generation that precisely interweaves of moment or Thermal-mechanical Coupling as the form that transports of welding energy, thereby the weld time of conducting rod about 15s, its production efficiency is 10～50 times of MIG welding (to repeat heating for a long time as the welding energy input form).In addition, do not need auxiliary welding materials such as welding wire and protective gas during solid-state welding, pollutions such as radiationless and deposite metal dust make conducting rod create the advanced manufacturing technology of high-efficient energy-saving environment friendly.
Below in conjunction with wrought aluminium LD silver-plated before joint and the solderable conductor
2The manufacturing of CS conducting rod, the present invention is further described.
Embodiment:
The high-performance conducting rod of embodiment 1 110KVA high-voltage fence.External diameter Φ 90, length 534mm.The solid-state welding technological parameter, friction velocity: 950rpm～1050rpm, friction pressure: 20MPa～25MPa, fraction time: 6s～8s.Upsetting force: 85MPa～95MPa, the upset dwell time: 4s～6s.On C200 type friction-welding machine, joint or conductor are clamped in rolling clamp, body is clamped in mobile anchor clamps, by PLC control welding procedure.
Postwelding detects: silver coating is intact, welding point resistivity 8.8 * 10
-8Ω m, hot strength 301MPa.
The high-performance conducting rod of embodiment 2 330KVA high-voltage fences.External diameter Φ 125, length 762mm.The solid-state welding technological parameter, friction velocity: 1000rpm～1100rpm, friction pressure: 18MPa～23MPa, fraction time: 7s～9s, upsetting force: 80MPa～90MPa, upset dwell time: 5a～7s.On C400 type friction-welding machine, joint or conductor are clamped in rolling clamp, body is clamped in mobile anchor clamps, by PLC control welding procedure.
Postwelding detects: silver coating is intact, welding point resistivity 7.8 * 10
-8Ω m, hot strength 295MPa.
The high-performance conducting rod of embodiment 3 550KVA high-voltage fences.External diameter Φ 165, length 1062mm, solid-state welding technological parameter, friction velocity: 1050rpm～1150rpm, friction pressure: 16MPa～20MPa, fraction time: 8s～10s, upsetting force: 75MPa～85MPa, upset dwell time: 6s～8s.On C600 type friction-welding machine, joint or conductor are clamped in rolling clamp, body is clamped in mobile anchor clamps, by PLC control welding procedure.
Postwelding detects: silver coating is intact, welding point resistivity 6.1 * 10
-8Ω m, hot strength 307MPa.
Claims (1)
1. the solid welding method of high-performance conducting rod, be the moment of momentum of generation when precisely interweaving and Thermal-mechanical Coupling with rotation and straight-line weldment moment as the form that transports of welding energy, guarantee wrought aluminium LD
2CS realizes welding under the condition that does not produce local melting.May further comprise the steps:
1) two ends of joint, conductor and body is processed into the flat butt joint form of pipe/pipe, hands over joint and conductor is silver-plated.
2) joint or conductor are clamped in the friction-welding machine rolling clamp, and body is clamped in the mobile anchor clamps.
3) according to the thermophysical parameter and the concrete structure size of conducting rod material, determine friction velocity, friction pressure, rub heating time, solid-state welding process parameter such as upsetting force and dwell time thereof via PLC, welds together an end of joint or conductor and body.
4) adopt above-mentioned parameter, the other end of joint or conductor and body will be connected together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810232191A CN101740987A (en) | 2008-11-10 | 2008-11-10 | Solid-state welding production method of high-performance conducting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810232191A CN101740987A (en) | 2008-11-10 | 2008-11-10 | Solid-state welding production method of high-performance conducting rod |
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| Publication Number | Publication Date |
|---|---|
| CN101740987A true CN101740987A (en) | 2010-06-16 |
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| CN200810232191A Pending CN101740987A (en) | 2008-11-10 | 2008-11-10 | Solid-state welding production method of high-performance conducting rod |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019503A (en) * | 2010-12-07 | 2011-04-20 | 哈尔滨正晨焊接切割设备制造有限公司 | Friction projection welding method of silver plate metallurgy conducting rod |
| CN103586577A (en) * | 2013-12-02 | 2014-02-19 | 兰州连城铝业有限责任公司 | Friction welding method of aluminum guide rod and steel claw |
| CN105226479A (en) * | 2015-09-28 | 2016-01-06 | 平高集团有限公司 | A kind of preparation method of tubular type conducting rod, hydraulic bulging device and tubular type conducting rod |
| CN105610035A (en) * | 2016-01-28 | 2016-05-25 | 朱剑虹 | Manufacturing method for copper-aluminum terminal |
| CN106564195A (en) * | 2016-11-07 | 2017-04-19 | 厦门理工学院 | Design method of plastic assembly piece rotary welding parameters |
| CN106825903A (en) * | 2015-12-07 | 2017-06-13 | 上海航天设备制造总厂 | A kind of aluminium alloy conducting rod manufacture method |
| CN113478230A (en) * | 2021-07-15 | 2021-10-08 | 江苏恒高电气制造有限公司 | Conductor welding device and welding method |
-
2008
- 2008-11-10 CN CN200810232191A patent/CN101740987A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019503A (en) * | 2010-12-07 | 2011-04-20 | 哈尔滨正晨焊接切割设备制造有限公司 | Friction projection welding method of silver plate metallurgy conducting rod |
| CN102019503B (en) * | 2010-12-07 | 2014-09-17 | 哈尔滨正晨焊接切割设备制造有限公司 | Friction projection welding method of silver plate metallurgy conducting rod |
| CN103586577A (en) * | 2013-12-02 | 2014-02-19 | 兰州连城铝业有限责任公司 | Friction welding method of aluminum guide rod and steel claw |
| CN105226479A (en) * | 2015-09-28 | 2016-01-06 | 平高集团有限公司 | A kind of preparation method of tubular type conducting rod, hydraulic bulging device and tubular type conducting rod |
| CN106825903A (en) * | 2015-12-07 | 2017-06-13 | 上海航天设备制造总厂 | A kind of aluminium alloy conducting rod manufacture method |
| CN106825903B (en) * | 2015-12-07 | 2020-01-07 | 上海航天设备制造总厂 | Manufacturing method of aluminum alloy conducting rod |
| CN105610035A (en) * | 2016-01-28 | 2016-05-25 | 朱剑虹 | Manufacturing method for copper-aluminum terminal |
| CN106564195A (en) * | 2016-11-07 | 2017-04-19 | 厦门理工学院 | Design method of plastic assembly piece rotary welding parameters |
| CN106564195B (en) * | 2016-11-07 | 2019-02-22 | 厦门理工学院 | A kind of design method of plastics component rotating welding parameter |
| CN113478230A (en) * | 2021-07-15 | 2021-10-08 | 江苏恒高电气制造有限公司 | Conductor welding device and welding method |
| CN113478230B (en) * | 2021-07-15 | 2022-04-22 | 江苏恒高电气制造有限公司 | Conductor welding device and welding method |
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Addressee: Cheng Lihong Document name: Notification of Passing Preliminary Examination of the Application for Invention |
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Open date: 20100616 |