CN1395265A - Method for making integral electric contact - Google Patents

Method for making integral electric contact Download PDF

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Publication number
CN1395265A
CN1395265A CN 02129497 CN02129497A CN1395265A CN 1395265 A CN1395265 A CN 1395265A CN 02129497 CN02129497 CN 02129497 CN 02129497 A CN02129497 A CN 02129497A CN 1395265 A CN1395265 A CN 1395265A
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Prior art keywords
electric contact
friction
friction welding
rotating speed
weldering
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CN 02129497
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Chinese (zh)
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CN1188879C (en
Inventor
段沛林
孙芸
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Beijing Shanghuayang Electronic Technology Development Co., Ltd.
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段沛林
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Publication of CN1188879C publication Critical patent/CN1188879C/en
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Expired - Fee Related legal-status Critical Current

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Abstract

The invention discloses the method for manufacturing the solid type electric contact belonging to the sintering technique. The technique of the friction welding makes the two kinds of metals composed of the electric contact weld together. Then the proper heart treatment for removing the internal stress and the whole form processing are carried out so as to obtain the solid type electric contact with better tensils strength and rigidity. Comparing with the liquid phase sintering, the friction welding technique provides the advantages of 5% higher yield, productivity raised 7.3 times, saving copper product more than 36%, eliminating the procedure for treating the solidified liquid.

Description

A kind of method of making integral electric contact
Technical field
The invention belongs to the solder technology scope, particularly be widely used in a kind of method of making integral electric contact of various middle and high voltage breakers.
Background technology
Integral electric contact is widely used in the various mesohigh circuit breakers, is the core component of various power switches, at present, generally adopts whole liquid sintering technology to make integral electric contact.A kind of peculiar part that the integral type contact is made up of two kinds of unlike materials, its head is a copper-tungsten, be used for arc extinguishing, afterbody generally is that its main effect of copper alloy QCr0.5 is to possess certain elasticity and excellent conducting performance, with regard to integral electric contact, the bond strength of two kinds of material faying faces, conductivity are the factors that influences the most critical of integral electric contact combination property.The silver alloy commonly used or the method for copper alloy soldering, its interface conductivity and bond strength be all less than mother metal, postwelding copper tail end annealing softening, and interface performance becomes the weak link of electrical contact, and easily heating is in use snapped and is come off; Another kind method is the electrical contact through liquid-phase sintering, and its boundary strength can be near strength of parent (copper tail), and electrical property reaches the copper-tungsten level, but the process-cycle is long, takes material.
Summary of the invention
The purpose of this invention is to provide a kind of method of making integral electric contact, it is characterized in that: the present invention adopts the mode of friction welding that two kinds of dissimilar metal planes are closely contacted, couple together by the intermetallic atom diffusion under certain pressure and rotating speed, its technical process is:
1). the copper-tungsten sintering: be the alloy preform that will suppress in advance, under 1360 ℃ of temperature and hydrogen shield, fired 1.5 hours, lower the temperature naturally.
2). prepare before the weldering: joint design becomes big plane contact, and the weldment cylindrical is cylindrical, and its flatness, perpendicularity are not more than 0.2mm, weldering front connector surface is with file or sand papering, remove oxide, the surface is cleaned through alcohol or ether, in case mix other ion or impurity;
3). friction welding (FW): contact and weldering tail are clipped on the machine of desire use, aim at and clamp, adjust welding parameters such as rotating speed, friction pressure, fraction time, burnoff length, down time and forge length; The friction welding standard is: getting the joint diameter is 12～45mm; The adjustment rotating speed is 1500～2700rpm; Friction pressure is 80～120 (10 6N/m 2), fraction time is 3～7S, and friction feed speed is 1.2Mm/s, and upsetting force is 150～200 (10 6N/m 2), forge length 3mm.
4). remove overlap: the postwelding overlap with car, mill the mechanical means removal.
5). weldquality detects: adopt ultrasonic wave or x-ray inspection, solder bond face vertical-depth is detected have or not weld crack, lack of penetration defective;
6). Ageing Treatment: 480 ℃, be incubated 4 hours, cool to normal temperature then with the furnace;
7). machining: it is stand-by to be processed into product by designing requirement.
Beneficial effect of the present invention 1. friction welding (FW) relatively is suitable for the dissimilar metal welding, and its weld seam is for forging tissue, so bond strength meets or exceeds mother metal.2. because the process of friction welding is the process of intermetallic atom diffusion, the grain refinement of postwelding interface, electrical property reaches or is higher than mother metal.It is feasible making integral electric contact with the method for friction welding (FW).3. the friction welding (FW) rate of finished products improves 5% more than 99% with respect to liquid-phase sintering, and production efficiency improves 73 times.4. saved the solution treatment operation on technology, welding cycle is short, and single products is saved copper material 36.7%, has remarkable economic efficiency.
Embodiment
The purpose of this invention is to provide a kind of method of making integral electric contact, it is characterized in that: the present invention adopts the mode of friction welding that two kinds of dissimilar metal planes are closely contacted, and couples together by the intermetallic atom diffusion under certain pressure and rotating speed.Its technical process is:
1). the copper-tungsten sintering: be the alloy preform that will suppress in advance, under 1360 ℃ of temperature and hydrogen shield, fired 1.5 hours, lower the temperature naturally.
2). prepare before the weldering: joint design becomes big plane contact, and the weldment cylindrical is cylindrical, and its flatness, perpendicularity are not more than 0.2mm, weldering front connector surface is with file or sand papering, remove oxide, the surface is cleaned through alcohol or ether, in case mix other ion or impurity;
3). friction welding (FW): contact and weldering tail are clipped on the machine of desire use, aim at clamping, adjust welding parameters such as rotating speed, friction pressure, fraction time, burnoff length, down time and forge length, the friction welding standard is:
Getting the joint diameter is 12～45mm; Adjust rotating speed 1500～2700rpm; Friction pressure 80～120 (10 6N/m 2) fraction time 3～7S, friction feed speed 1.2Mm/s, upsetting force 150～200 (10 6N/m 2), be about 2 times of friction pressure, forge length 3mm.
4). remove overlap: the postwelding overlap with car, the mechanical means removal such as mill.
5). weldquality detects: adopt ultrasonic wave or x-ray inspection, solder bond face vertical-depth is detected weld crack, defective such as lack of penetration;
6). Ageing Treatment: 480 ℃, be incubated 4 hours, cool to normal temperature then with the furnace;
7). machining: it is stand-by to be processed into product by designing requirement.
Contrast friction welding (FW) and two kinds of methods of liquid-phase sintering, the present invention has saved the solution treatment operation on operation, contract
Lacked process time, it is identical to get its major parameter resistivity after tested, in the tension of hardness and faying face
The intensity aspect all is better than the remarkable result of liquid-phase sintering.

Claims (1)

1. method of making integral electric contact is characterized in that: the present invention adopts the mode of friction welding that two kinds of dissimilar metal planes are closely contacted, and couples together by the intermetallic atom diffusion under certain pressure and rotating speed, and its technical process is:
1). the copper-tungsten sintering: be the alloy preform that will suppress in advance, under 1360 ℃ of temperature and hydrogen shield, fired 1.5 hours, lower the temperature naturally.
2). prepare before the weldering: joint design becomes big plane contact, and the weldment cylindrical is cylindrical, and its flatness, perpendicularity are not more than 0.2mm, weldering front connector surface is with file or sand papering, remove oxide, the surface is cleaned through alcohol or ether, in case mix other ion or impurity;
3). friction welding (FW): contact and weldering tail are clipped on the machine of desire use, aim at and clamp, adjust welding parameters such as rotating speed, friction pressure, fraction time, burnoff length, down time and forge length; The friction welding standard is: getting the joint diameter is 12～45mm; The adjustment rotating speed is 1500～2700rpm; Friction pressure is 80～120 (10 6N/m 2), fraction time is 3～7S, and friction feed speed is 1.2Mm/s, and upsetting force is 150～200 (10 6N/m 2), forge length 3mm.
4). remove overlap: the postwelding overlap with car, mill the mechanical means removal.
5). weldquality detects: adopt ultrasonic wave or x-ray inspection, solder bond face vertical-depth is detected have or not weld crack, lack of penetration defective;
6). Ageing Treatment: 480 ℃, be incubated 4 hours, cool to normal temperature then with the furnace;
7). machining: it is stand-by to be processed into product by designing requirement.
CN 02129497 2002-08-23 2002-08-23 Method for making integral electric contact Expired - Fee Related CN1188879C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 02129497 CN1188879C (en) 2002-08-23 2002-08-23 Method for making integral electric contact

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 02129497 CN1188879C (en) 2002-08-23 2002-08-23 Method for making integral electric contact

Publications (2)

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CN1395265A true CN1395265A (en) 2003-02-05
CN1188879C CN1188879C (en) 2005-02-09

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CN 02129497 Expired - Fee Related CN1188879C (en) 2002-08-23 2002-08-23 Method for making integral electric contact

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101456131B (en) * 2007-12-10 2010-06-16 河南森源电气股份有限公司 High-pressure rotary isolating-switch earth-contact milling clamp
CN102500911A (en) * 2011-11-21 2012-06-20 哈尔滨工业大学 Pre-friction aid device and method for implementing diffusion bonding by using same
CN103949741A (en) * 2014-04-25 2014-07-30 甘肃虹光电气有限责任公司 Method for brazing copper tungsten carbide electrical contact and conducting rod
CN104057257A (en) * 2014-06-25 2014-09-24 中国西电电气股份有限公司 Method for manufacturing shielding bolt contact
CN104741854A (en) * 2015-03-27 2015-07-01 王小玲 Machining clamping device for circuit breaker contact
CN105397279A (en) * 2015-12-29 2016-03-16 陕西斯瑞工业有限责任公司 Welding method of copper-chromium load switch component
CN105590771A (en) * 2015-12-29 2016-05-18 陕西斯瑞新材料股份有限公司 Manufacturing method of copper-tungsten load switch
CN107552941A (en) * 2016-06-07 2018-01-09 程国中 A kind of welding method of heat carrier and conductive structure part
CN107552942A (en) * 2016-06-07 2018-01-09 无锡云源光电科技有限公司 A kind of welding method of LED area light source and heat-conducting substrate
CN111215742A (en) * 2018-11-27 2020-06-02 西安西电高压开关有限责任公司 Connection method of copper-tungsten alloy and chromium bronze and electric contact

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100388999C (en) * 2006-03-23 2008-05-21 汉中双戟摩擦焊接制造技术有限责任公司 Friction welding method for high voltage power transmission and transforming contact
CN101635210B (en) * 2009-08-24 2011-03-09 西安理工大学 Method for repairing defect in tungsten copper-copper integral electric contact material

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101456131B (en) * 2007-12-10 2010-06-16 河南森源电气股份有限公司 High-pressure rotary isolating-switch earth-contact milling clamp
CN102500911A (en) * 2011-11-21 2012-06-20 哈尔滨工业大学 Pre-friction aid device and method for implementing diffusion bonding by using same
CN102500911B (en) * 2011-11-21 2014-02-12 哈尔滨工业大学 Pre-friction aid device and method for implementing diffusion bonding by using same
CN103949741A (en) * 2014-04-25 2014-07-30 甘肃虹光电气有限责任公司 Method for brazing copper tungsten carbide electrical contact and conducting rod
CN103949741B (en) * 2014-04-25 2016-08-17 甘肃虹光电气有限责任公司 A kind of brazed copper tungsten tungsten carbide electrical contact and the method for conducting rod
CN104057257A (en) * 2014-06-25 2014-09-24 中国西电电气股份有限公司 Method for manufacturing shielding bolt contact
CN104741854A (en) * 2015-03-27 2015-07-01 王小玲 Machining clamping device for circuit breaker contact
CN105397279A (en) * 2015-12-29 2016-03-16 陕西斯瑞工业有限责任公司 Welding method of copper-chromium load switch component
CN105590771A (en) * 2015-12-29 2016-05-18 陕西斯瑞新材料股份有限公司 Manufacturing method of copper-tungsten load switch
CN107552941A (en) * 2016-06-07 2018-01-09 程国中 A kind of welding method of heat carrier and conductive structure part
CN107552942A (en) * 2016-06-07 2018-01-09 无锡云源光电科技有限公司 A kind of welding method of LED area light source and heat-conducting substrate
CN111215742A (en) * 2018-11-27 2020-06-02 西安西电高压开关有限责任公司 Connection method of copper-tungsten alloy and chromium bronze and electric contact

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Publication number Publication date
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