CN100388999C - Friction welding method for high voltage power transmission and transforming contact - Google Patents
Friction welding method for high voltage power transmission and transforming contact Download PDFInfo
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- CN100388999C CN100388999C CNB2006100419646A CN200610041964A CN100388999C CN 100388999 C CN100388999 C CN 100388999C CN B2006100419646 A CNB2006100419646 A CN B2006100419646A CN 200610041964 A CN200610041964 A CN 200610041964A CN 100388999 C CN100388999 C CN 100388999C
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- contact head
- contact
- welding method
- frictional
- frictional welding
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Abstract
The present invention discloses a frictional welding method of a high voltage power transmission and transformation contact head. The present invention aims to solve the problem that the contact head formed by a braze welding method in the prior art has high resistivity and low tensile strength. The frictional welding method comprises the steps that a metallurgical sintered tungsten-copper alloy contact head and a stiff red copper T2Y contact head rod are respectively clamped by a rotary clamp and a moving clamp of a frictional welding machine; frictional welding is carried out for 0.3s to 0.5s under the condition that rotation speed is from 1200 rpm to 1530 rpm, and initial friction pressure is from 38MPa to 67MPa; stable frictional welding is again carried out for 3.3s to 3.5s under the condition that the rotation speed is from 3200 rpm to 5800 rpm, and the frictional pressure is from 49.3MPa to 90MPa, and then the frictional welding machine is braked; when the frictional welding machine is braked for 0.2s to 0.27s, the upsetting pressure of 134.4MPa to 314MPa is applied, and the upsetting pressure is kept for 3s. The frictional welding method is used to form the contact head, no solder is added into a combining part of the contact head and a contact head rod, so the chemical composition of an interface is not changed; the resistivity of raw material is kept and is 0.19 omega/mm<2>, and the resistivity is almost one half of the resistivity which is 0.33 omega/mm<2> of the prior art; tensile strength sigma<b> is raised from 200MPas of the prior art to 275MPa; besides, productive efficiency is raised by two to four times.
Description
Technical field
The present invention relates to a kind of friction welding method of high voltage power transmission and transforming contact.
Background technology
High voltage power transmission and transforming contact is the critical component of 550KV, 330KV, 110KV high voltage power transmission and transforming net, and should conduct electricity has certain intensity again.
Known high voltage power transmission and transforming contact is that the production cycle is very long by metallurgy sintered tungsten-copper alloy manufacturing, and price is expensive especially.For improving the product price ratio, afterwards, the scientific research personnel partly used expensive metallurgy sintered tungsten-copper alloy materials processing moulding with contact, and the contact stem part is then used relatively inexpensive hard attitude red copper T
2Y materials processing moulding adopts soldering that contact and contact stem are connected into integral contact again.When the method for welding moulding, on the one hand because the adding of solder has changed metallurgy sintered tungsten-copper alloy/hard attitude red copper T
2The chemical composition at Y interface, the pricker rate of closing is difficult to reach more than 95% on the other hand, and brazed seam is a cast sturcture.The electricalresistivity of integral contact is generally at 0.33 Ω mm after the soldering
2About/m, almost be hard attitude red copper T
2Y resistivity 0.19 Ω mm
2Two times of/m; Hot strength σ
bBeing generally about 200MPa, is hard attitude red copper T
271% of Y hot strength 280MPa does not reach instructions for use.And the production cycle is long, and spillage of material is serious, the cost height, and efficient is low.
Summary of the invention
In order to overcome the low deficiency of resistivity height, hot strength of contact after the prior art moulding, the invention provides a kind of friction welding method of high voltage power transmission and transforming contact.
The technical solution adopted for the present invention to solve the technical problems is: a kind of friction welding method of high voltage power transmission and transforming contact comprises the steps:
1) with metallurgy sintered tungsten-copper alloy contact and hard attitude red copper T
2The Y contact stem is held on the rolling clamp and the mobile anchor clamps of friction-welding machine respectively;
2) with rotating speed 1200rpm～1530rpm, initial friction pressure 38MPa～67MPa friction welding 0.3s～0.5s;
3) again with rotating speed 3200rpm～5800rpm, friction pressure 49.3MPa～90MPa brakes after stablizing friction welding 3.3s～3.5s;
4) apply the upsetting force of 134.4MPa～314MPa during brake 0.2s～0.27s, and keep upsetting force 3s.
The invention has the beneficial effects as follows: owing to adopt friction welding method moulding contact, the joint portion of contact and contact stem does not have solder and adds, the chemical composition at interface does not change, and has kept raw-material resistivity, so friction welding molded integral contact resistivity 0.19 Ω mm
2/ m almost is prior art lead welding and shaping integral contact resistivity 0.33 Ω mm
2Half of/m; Hot strength σ
b200MPa by prior art brings up to 275MPa.And save solder, brazing flux and degreasing striping material, and the preweld cleaning operation, enhance productivity 2～4 times.
The present invention is further described below in conjunction with embodiment.
The specific embodiment
Embodiment 1: the metallurgy sintered tungsten-copper alloy contact of φ 25 and hard attitude red copper T
2The Y contact stem is held on the rolling clamp and the mobile anchor clamps of friction-welding machine respectively.With preparation rotating speed 1200rpm, initial friction pressure 67MPa begins friction welding, and behind the 0.5s, with Second-Stage Rotating Speed 3200rpm, secondary friction pressure 90MPa stablizes friction welding.3.5s back brake.Apply the upsetting force of 314MPa during brake 0.2s.After upsetting force keeps 3s, form metallurgy sintered tungsten-copper alloy/hard attitude red copper T
2The Y high voltage power transmission and transforming contact.
After testing, the electricalresistivity of integral contact is 0.191 Ω mm2/m after the moulding, and hot strength σ b is 274.8MPa.
Embodiment 2: the metallurgy sintered tungsten-copper alloy contact of φ 20 and hard attitude red copper T
2The Y contact stem is held on the rolling clamp and the mobile anchor clamps of friction-welding machine respectively.With preparation rotating speed 1300rpm, initial friction pressure 44.8MPa begins friction welding, and behind the 0.4s, with Second-Stage Rotating Speed 4000rpm, secondary friction pressure 67MPa stablizes friction welding.3.6s back brake.Apply the upsetting force of 314MPa during brake 0.25s, after upsetting force keeps 3s, form metallurgy sintered tungsten-copper alloy/hard attitude red copper T
2The Y high voltage power transmission and transforming contact.
After testing, the electricalresistivity of integral contact is 0.190 Ω mm2/m after the moulding, and hot strength σ b is 275MPa.
Embodiment 3: the metallurgy sintered tungsten-copper alloy contact of φ 8 and hard attitude red copper T
2The Y contact stem is held on the rolling clamp and the mobile anchor clamps of friction-welding machine respectively.With preparation rotating speed 1530rpm, initial friction pressure 38MPa begins friction welding; 0.3s after, with Second-Stage Rotating Speed 5800 rpm, secondary friction pressure 49.3MPa stablizes friction welding.3.7s back brake.Apply the upsetting force of 134.4MPa during brake 0.27s.After upsetting force keeps 3s, form metallurgy sintered tungsten-copper alloy/hard attitude red copper T
2The Y high voltage power transmission and transforming contact.
After testing, the electricalresistivity of integral contact is 0.19 Ω mm2/m after the moulding, and hot strength σ b is 276MPa.
Claims (1)
1. the friction welding method of a high voltage power transmission and transforming contact comprises the steps:
1) with metallurgy sintered tungsten-copper alloy contact and hard attitude red copper T
2The Y contact stem is held on the rolling clamp and the mobile anchor clamps of friction-welding machine respectively;
2) with rotating speed 1200rpm～1530rpm, initial friction pressure 38MPa～67MPa friction welding 0.3s～0.5s;
3) again with rotating speed 3200rpm～5800rpm, friction pressure 49.3MPa～90MPa brakes after stablizing friction welding 3.3s～3.5s;
4) apply the upsetting force of 134.4MPa～314MPa during brake 0.2s～0.27s, and keep upsetting force 3s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100419646A CN100388999C (en) | 2006-03-23 | 2006-03-23 | Friction welding method for high voltage power transmission and transforming contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100419646A CN100388999C (en) | 2006-03-23 | 2006-03-23 | Friction welding method for high voltage power transmission and transforming contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1820887A CN1820887A (en) | 2006-08-23 |
| CN100388999C true CN100388999C (en) | 2008-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100419646A Expired - Fee Related CN100388999C (en) | 2006-03-23 | 2006-03-23 | Friction welding method for high voltage power transmission and transforming contact |
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| CN (1) | CN100388999C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856101A (en) * | 2012-08-22 | 2013-01-02 | 上海电科电工材料有限公司 | Manufacturing method for friction welding type electrode contact |
| CN104014929A (en) * | 2014-06-19 | 2014-09-03 | 西安特种设备检验检测院 | Dissimilar metal welding method for martensite heat-resisting steel and high-temperature nickel base alloy |
| 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 |
| CN104923908A (en) * | 2015-06-02 | 2015-09-23 | 陕西理工学院 | Friction welding method of tool shank of high-accuracy NC machining center |
| CN108869515A (en) * | 2018-06-25 | 2018-11-23 | 苏州鑫金茂金属科技有限公司 | A kind of 304 sheet metal components with nut |
| 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 |
| CN109595139B (en) * | 2018-12-25 | 2024-01-09 | 浙江麦迪制冷科技股份有限公司 | Oil level controller connection method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19748288A1 (en) * | 1997-10-31 | 1999-05-06 | Kloeckner Moeller Gmbh | Low voltage switch contact piece |
| JP2001138069A (en) * | 1999-11-17 | 2001-05-22 | Toshiba Corp | Welded body of different kinds of metal materials, arc contactor and contactor |
| JP2004031028A (en) * | 2002-06-24 | 2004-01-29 | Asahi Kasei Chemicals Corp | Electric contact material or electrode material |
| CN1187160C (en) * | 1997-11-19 | 2005-02-02 | 东芝株式会社 | Binding structure for different kinds of metal |
| CN1188879C (en) * | 2002-08-23 | 2005-02-09 | 段沛林 | Method for manufacturing integral electric contact |
-
2006
- 2006-03-23 CN CNB2006100419646A patent/CN100388999C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19748288A1 (en) * | 1997-10-31 | 1999-05-06 | Kloeckner Moeller Gmbh | Low voltage switch contact piece |
| CN1187160C (en) * | 1997-11-19 | 2005-02-02 | 东芝株式会社 | Binding structure for different kinds of metal |
| JP2001138069A (en) * | 1999-11-17 | 2001-05-22 | Toshiba Corp | Welded body of different kinds of metal materials, arc contactor and contactor |
| JP2004031028A (en) * | 2002-06-24 | 2004-01-29 | Asahi Kasei Chemicals Corp | Electric contact material or electrode material |
| CN1188879C (en) * | 2002-08-23 | 2005-02-09 | 段沛林 | Method for manufacturing integral electric contact |
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| Publication number | Publication date |
|---|---|
| CN1820887A (en) | 2006-08-23 |
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Granted publication date: 20080521 Termination date: 20130323 |