CN101645355A - Static contact for starting electromagnetic switch of motor - Google Patents
Static contact for starting electromagnetic switch of motor Download PDFInfo
- Publication number
- CN101645355A CN101645355A CN200910144492A CN200910144492A CN101645355A CN 101645355 A CN101645355 A CN 101645355A CN 200910144492 A CN200910144492 A CN 200910144492A CN 200910144492 A CN200910144492 A CN 200910144492A CN 101645355 A CN101645355 A CN 101645355A
- Authority
- CN
- China
- Prior art keywords
- electromagnetic switch
- contact
- static contact
- motor
- copper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Contacts (AREA)
Abstract
The invention discloses a static contact for starting an electromagnetic switch of a motor, which comprises a steel bolt, the upper end surface of the head part of which is welded with a static contact piece. The service life of the static contact reaches 35000 times, the contact resistance is less than 1m omega, the production cost is reduced by less than 30%, and no sintering phenomenon can be caused.
Description
Technical field
The invention belongs to the parts of starter motor, specifically is the fixed contact of starter motor electromagnetic switch.
Background technology
Diesel engine vehicle launch motor speed height, moment of torsion is big, power output is big.And generally adopt 12V and 24V power supply, the big current work of 500-1000A.Because the electric current by the switch main contacts is big, so galvanic corrosion and oxidation easily take place the temperature height.This just require electromagnetic switch (Switch solenolds) main contacts of starter motor have resistance little, be difficult for oxidation, characteristics that fusing point is high, to have resistance to wear simultaneously.The more satisfactory material of main contacts is a silver at present, but because the cost height, domestic starter motor electromagnetic switch main contacts is generally made with cathode copper, and the cathode copper material is all adopted in promptly dynamic and static contact.But because fixed contact is to adopt the electrolysis rod to make, amount of copper consuming is big, and cost is relative still very high.Simultaneously, because cathode copper hardness is low, fusing point is lower, does not satisfy the useful life under the big electric current, and especially evil is more gone through in galvanic corrosion under the big function of current, when particularly contact pressure is not enough, sintering phenomenon takes place easily, has reduced the life-span of electromagnetic switch.When serious, dynamic and static contact sintering can not break away from outage together, the serious consequence that causes starter motor to burn out.On the other hand, the cathode copper mechanical strength is low, and threaded portion stripped thread easily takes place lost efficacy; Contact portion is subject to the impulsive force distortion, reduces moving contact and fixed contact contact performance, makes switch failure.In a word, because the main contacts problem of materials makes the electromagnetic switch life-span of present domestic market be difficult to reach 20000 times specification requirement.Improve the electromagnetic switch life-span so the solution of main contacts problem of materials becomes, improve a key factor of service quality.
Summary of the invention
The fixed contact that the purpose of this invention is to provide a kind of starter motor electromagnetic switch, the life-span can reach 35000 times, and contact resistance is less than 1m Ω, and production cost has descended below 30% simultaneously, and the phenomenon of sintering can not occur.
Technical scheme of the present invention is as follows:
The fixed contact of starter motor electromagnetic switch includes Steel Bolt, and the upper surface of the head of bolt is welded with the stationary contact spot film.The material of stationary contact spot film is a copper-tungsten.
Life-span of the present invention can reach 35000 times, and contact resistance is less than 1m Ω, and production cost has descended below 30% simultaneously, brings up to about HB80, and its fusing point is 1083 ℃.The fusing point of fixed contact reaches 1350 ℃, and hardness is HB130, form on fixed contact, the moving contact material difference.Even big electric current under the insecure situation in contact, also is difficult to sintering advantage together.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Referring to accompanying drawing, the fixed contact of starter motor electromagnetic switch includes Steel Bolt 1, and the upper surface of the head of bolt 1 is welded with stationary contact spot film 2.The material of stationary contact spot film 2 is a copper-tungsten.
Concrete process for producing is as follows:
1, stationary contact spot film 2 is to be that matrix adds tungsten metal and other mischmetal material with the copper metal, by the powder compaction SINTERING TECHNOLOGY, makes the thick copper-tungsten film-making of 1.5mm.Owing to added the tungsten metal, thereby improved the fusing point of material, reduced the sintering defective.Matrix is copper and other a spot of metallic element resistance that descended, through record contact resistance≤1m Ω under normal pressure.And the intensity of material and hardness are all much higher than pure electrolytic copper, and complex element contact fusing point reaches more than 1350 ℃, and hardness HB 〉=130 are improved useful life of contact greatly.The contact that this technology is made belongs to does not have the cutting product, improves the material service efficiency.
2, bolt 1 is selected the cold honest moulding of Fine Steel Casting iron-No. 20 steel for use, forms screw thread through rolled thread.Because No. 20 steel are than cathode copper yield strength height, rigidity is strong, and screw thread is combined, and bearing capacity is strong.Simultaneously, No. 20 the steel market price is lower than copper, has reduced cost.
3, bolt 1 connects the soldering tech that adopts in the welding with stationary contact spot film 2.Soldering is applied to weld two kinds of different materials, have the distortion little, the characteristics that joint is smooth.Add postwelding surface treatment (parcel plating---steel part part), attractive in appearance behind this component forming like this.
4, after the welding, stationary contact spot film 2 is carried out cut, reduce the distortion of soldering and powder metallurgical technique, improve the flatness on surface, so that increase contact area, improve contact stress.
5, after the cut, stationary contact spot film 2 is coated with antirust oil, anti-oxidation.Antirust oil is selected ion antirust oil for use, and it can the anti-oxidation magnetic of not overslaugh again, has solved problem of oxidation.
Claims (2)
1, the fixed contact of starter motor electromagnetic switch is characterized in that: include Steel Bolt, the upper surface of the head of bolt is welded with the stationary contact spot film.
2, the fixed contact of starter motor electromagnetic switch according to claim 1 is characterized in that: the material of described stationary contact spot film is a copper-tungsten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910144492A CN101645355A (en) | 2009-08-13 | 2009-08-13 | Static contact for starting electromagnetic switch of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910144492A CN101645355A (en) | 2009-08-13 | 2009-08-13 | Static contact for starting electromagnetic switch of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101645355A true CN101645355A (en) | 2010-02-10 |
Family
ID=41657181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910144492A Pending CN101645355A (en) | 2009-08-13 | 2009-08-13 | Static contact for starting electromagnetic switch of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101645355A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2277834A (en) * | 1993-01-16 | 1994-11-09 | Bosch Gmbh Robert | Electromagnetic relay for the starter of an internal combustion engine |
-
2009
- 2009-08-13 CN CN200910144492A patent/CN101645355A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2277834A (en) * | 1993-01-16 | 1994-11-09 | Bosch Gmbh Robert | Electromagnetic relay for the starter of an internal combustion engine |
Non-Patent Citations (1)
| Title |
|---|
| 王浩 等: "汽车起动机电磁开关粘连故障分析及应急措施", 《农业装备与车辆工程》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103231203B (en) | A kind of For Dissimilar Materials Aluminium method of attachment | |
| CN110257679B (en) | Preparation method of molybdenum-based alloy coating | |
| CN106735207B (en) | A kind of preparation method of high-compactness Cu/CuCr gradient composites | |
| CN103567663A (en) | High-entropy alloy welding wire for welding titanium-steel and preparation method thereof | |
| CN105274384A (en) | High-strength anti-wear copper-based composite material and preparation method thereof | |
| CN110216939B (en) | Copper-aluminum composite base material and pressure diffusion welding processing method and application thereof | |
| CN103753005A (en) | High strength steel-aluminum alloy dissimilar metal connecting method | |
| CN103352136A (en) | Copper-based contact material and manufacturing process thereof | |
| JP2008284570A (en) | Method and apparatus for joining different kinds of metal | |
| CN110877147B (en) | Asymmetric resistance spot welding method for steel and aluminum | |
| CN202147089U (en) | Copper-aluminum dissimilar metal pressure deposition welding machine | |
| CN102145439A (en) | Method for carrying out heterogeneous resistance brazing on steel and aluminium alloy | |
| CN201503775U (en) | Static contact for starting motor electromagnetic switch | |
| CN116900434B (en) | Method for improving wear resistance of aluminum alloy resistance spot welding electrode | |
| CN101645355A (en) | Static contact for starting electromagnetic switch of motor | |
| CN103551759B (en) | For welding material that magnesium/steel dissimilar metal connects and preparation method thereof | |
| CN201283474Y (en) | Welder special for compressor copper pipe | |
| CN107398654A (en) | The electron beam welding special filling material of titanium alloy and nickel base superalloy | |
| JP2002035955A (en) | Manufacturing method for aluminum alloy composite member by electrified joint | |
| CN1055732C (en) | Copper-base powder alloy material for electric contact | |
| CN103057201B (en) | Small-grain silver alloy laminar composite and preparation method thereof | |
| CN103042760B (en) | Ultra-fine grain silver alloy laminar composite and manufacturing method thereof | |
| CN102320835A (en) | Ti2SnC-based electrical contact material as well as preparation method and application thereof | |
| RU2522584C1 (en) | Method of material manufacturing for arc-quenching and electric break contacts and material | |
| CN109676283B (en) | Active brazing filler metal for diamond saw blade |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100210 |