CN104637711B - A kind of rivet contacts processing technology - Google Patents
A kind of rivet contacts processing technology Download PDFInfo
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- CN104637711B CN104637711B CN201510039965.6A CN201510039965A CN104637711B CN 104637711 B CN104637711 B CN 104637711B CN 201510039965 A CN201510039965 A CN 201510039965A CN 104637711 B CN104637711 B CN 104637711B
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- China
- Prior art keywords
- degrees celsius
- rivet contacts
- drive link
- temperature
- silver
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insertion Pins And Rivets (AREA)
Abstract
A kind of rivet contacts processing technology, it is characterised in that include the following steps：(1) prepare silver alloy silk material and Copper base material, the silver alloy silk material got ready and Copper base material are fed into cold press using rivet contacts processing feed arrangement, compound rivet contacts prefabricated component is made by the way of cold welding；(2) prefabricated component is put into vacuum annealing furnace and is heat-treated, heat treatment specifically includes：In-furnace temperature is increased to 380 degrees Celsius according to 150 degrees Celsius of speed hourly, when holding 1.5 is small, in-furnace temperature is then down to room temperature according to 130 degrees Celsius of speed hourly.Rivet contacts processing technology according to the present invention significantly improves the bond strength of rivet contacts in the case where not reducing electrician's performance of rivet contacts.
Description
Technical field
The present invention relates to a kind of rivet contacts processing technology.
Background technology
Silver contact, also known as rivet contacts, it is widely used in appliance switch circuit contact component, such as switch, temperature
Control device, the product such as relay circuit from, attach together and put.It is very high to current requirements from, splice grafting contact element, contact meeting of low quality
Influence conductive resistance and cause product to generate heat, so as to influence the safe to use and service life of product.Since silver belongs to valuable gold
Belong to, therefore in order to cost-effective, now generally use compound rivet contacts, it is main in the process of compound rivet contacts
Using two kinds of techniques, one is exactly high temperature brazing, and second is exactly cold welding.Cold welding belongs to one kind of Pressure Welding, refers to do not having
Have heating in the case of by means of pressure so that the contact site of multilayer materials metal produce plastic deformation and by means of
Atomic force and be combined together.In cold welding, bond strength is a very distinct issues, can possibly even be gone out when serious
The phenomenon that existing composite bed comes off.High temperature brazing is as its name suggests then welded different metal layer using very high temperature on the contact surface
Get up.But in this approach, due to the use of high temperature, it is clear that add processing cost；In addition, high-temperature process would generally be in product
Surface can produce oxide layer, and then influence the difficulty of the oxide layer processing of product, and product surface is extremely difficult to bright and clean, and surface has
Oxide layer or finish not enough can then influence electrician's characteristic of product, and the generation of oxide layer also influences production to a certain extent
The accuracy of product size.
In addition, referring to Fig. 1, existing process equipment directly drives the roller 2 on 3 head of drive link come real using cam 1 more
Existing drive link movement is so as to fulfill charging；But there are following defect for existing feeding manner：Feed unstable, it is difficult to adjust, essence
Degree is not high；Impact direction and drive link are angled between cam and drive head roller, can increase the friction between drive link and track 4
Power, in turn results in feed arrangement and is prone to wear out.
The content of the invention
It is contemplated that overcome drawbacks described above, there is provided a kind of rivet contacts processing technology, it is characterised in that including following step
Suddenly：(1) prepare silver alloy silk material and Copper base material, using rivet contacts processing feed arrangement by the silver alloy silk material got ready with it is copper-based
Material is fed into cold press, and compound rivet contacts prefabricated component is made by the way of cold welding；(2) prefabricated component is put into very
It is heat-treated in empty annealing furnace, maximum temperature is 550 degrees Celsius wherein in vacuum annealing furnace stove, and heat treatment specifically includes：Press
In-furnace temperature is increased to 380 degrees Celsius according to 150 degrees Celsius of speed hourly, keep 1.5 it is small when, it is then Celsius according to 130
Spend speed hourly and in-furnace temperature is down to room temperature.
Preferably, the vacuum condition is, for example, 0.1-1.5Pa.
Preferably, the rivet contacts processing feed arrangement includes cam, lever arm, lever, drive link, track, connection
Base and fixed component, lever lower end connection lever arm, the upper end of lever is by means of being bolted in connect base, connect base
Drive link is sheathed on, fixed component further fixes connect base, and cam acts on lever arm so as to drive drive link.
Preferably, the silver alloy includes silver, aluminium, copper and chromium, and by weight, silver-colored content is 85-89%, aluminium content 7-
13%, copper content 1-2%, chromium content 1-2%；When making silver alloy, each metal of weighing according to the above ratio first, places them into
Ball mill is put into vacuum melting furnace after dry and carried under 10Pa pressure and 1250 degrees Celsius when ball milling 1.5 is small in nitrogen atmosphere
Melting ingot casting, when then sintering is squeezed into bar and small insulation 2 under 880 degrees Celsius, extrusion ratio 1: 100；It is eventually fabricated silver-colored conjunction
Spun gold material.
Processing technology according to the present invention is heating product under ensureing vacuum state, after temperature holding and cooling processing,
Product surface is not in oxide layer, ensure that the original finish of product, and the product of non-oxidation layer will not increase connecing for product
Get an electric shock and hinder, it is ensured that electrician's performance of product；Each temperature in heat treatment is controlled by temperature automatic control and monitoring device
Value or rate of change and temperature hold-time value, can effectively control the characteristic of product；Made from processing technology according to the present invention
Bond strength in joint product between composite material is very high, its electrician's performance and service life have all reached very high design and wanted
Ask；Meanwhile joint product made from processing technology according to the present invention has taken into account material hardness and toughness, because product is hard
Degree, toughness are the key characteristics in properties of product and service life, and hardness and toughness are two conflicting characteristics of product, hardness higher position
Toughness deficiency occurs, it may appear that phenomena such as product cracks, hardness deficiency situation just occurs in good toughness, it may appear that deformation of products
Phenomenon.Since heat treatment process employs lower temperature, process costs are greatlyd save.In addition, the present invention passes through original
Single cam drive is changed to the kind of drive that cam adds lever, the precision and flexibility that increase charging is adjusted；Drive link stress
It is parallel, reduce the frictional force of drive link and track；Lever drive can flexibly increase the pressure that drive link passes out.
Brief description of the drawings
Fig. 1 is feed arrangement structure diagram of the prior art；
Fig. 2 is feed arrangement structure diagram according to the present invention；
Fig. 3 is compound rivet contacts schematic diagram according to the present invention.
Embodiment
Referring to Fig. 3, compound rivet contacts according to the present invention include the first ag alloy layer 21 positioned at top, are located at
The second ag alloy layer 23 and base copper 22 in an intermediate position of bottom.The top of first ag alloy layer 21 and base copper 22
The head of compound rivet contacts is collectively forming, the lower part of the second ag alloy layer 23 and base copper 22 is collectively forming compound rivet
The foot of contact.
In a preferred embodiment, the first ag alloy layer 21 is identical with 23 material of the second ag alloy layer.Wherein, which closes
Gold includes silver, aluminium, copper and chromium, and by weight, silver-colored content is 85-89%, aluminium content 7-13%, copper content 1-2%, chromium content
1-2%.When making silver alloy, each metal of weighing according to the above ratio first, places them into ball mill ball milling in nitrogen atmosphere
1.5 it is small when, be put into after dry in vacuum melting furnace in 10Pa pressure and 1250 degrees Celsius of lower melting ingot castings, it is then Celsius 880
When the lower sintering of degree is squeezed into bar and small insulation 2, extrusion ratio 1: 100；It is eventually fabricated silver alloy silk material.
In a further advantageous embodiment, the first ag alloy layer 21 is different with 23 material of the second ag alloy layer, wherein second
Argentiferous ratio in ag alloy layer 23 is more than the argentiferous ratio of the first ag alloy layer 21.Preferably, second ag alloy layer 23 contains
Silver-colored ratio 89%, the argentiferous ratio of the first ag alloy layer 21 is 85%.The silver alloy can also equally include silver, aluminium, copper and chromium,
Aluminium content is 7-13%, copper content 1-2%, chromium content 1-2%.When making silver alloy, weigh according to the above ratio respectively first each
Metal, when placing them into ball mill ball milling 1.5 is small in nitrogen atmosphere, is put into vacuum melting furnace in 10Pa pressure after dry
With 1250 degrees Celsius of lower melting ingot castings, then under 880 degrees Celsius sintering be squeezed into bar and keep the temperature 2 it is small when, extrusion ratio 1:
100；It is eventually fabricated silver alloy silk material.Since the argentiferous ratio in the second ag alloy layer 23 is more than the argentiferous of the first ag alloy layer 21
Ratio, is conducive to lift rivet contacts electrician performance and saves the use of silver.
The invention further relates to the feed arrangement used in compound rivet contacts process, which can be used
In the confession material process of cold welding or heat treatment.Referring to Fig. 2, feed arrangement according to the present invention includes：Cam 11, lever arm
12, lever 15, drive link 13, track 14, connect base 16 and fixed component 17.Lever lower end connect lever arm, lever it is upper
End is by means of being bolted in connect base, and connect base is sheathed on drive link, and fixed component further consolidates connect base
Live calmly.Cam acts on lever arm so as to drive drive link.
Preferably, drive link is cylinder, can reduce frictional force.
Preferably, connect base is arranged on drive link by means of thread bush, and fixed component on connect base contact surface with distinguishing
It is conformed with and groove, fixed component further fixes connect base by means of the cooperation of projection and groove；Preferably, it is fixed
Component is slidably sheathed on drive link, when fixed component along drive link close to connect base when, projection and groove, which are realized, to be coordinated,
Fixed component is fixed on drive link by means of the screwing bolts of side.Therefore can be upper in drive link by adjusting connect base
Put to adjust drive link start of a run or scope.Alternatively, it is also possible between the upper end by adjusting lever and connect base
Bolt is connected to adjust drive link start of a run or scope.
Preferably, lever arm is adjustably pivotally connected to the lower end of lever, therefore can be opposite by adjusting lever arm
The adjusting of drive link start of a run or scope is realized in the angle of lever.Preferably, lever arm both ends are respectively arranged with one
Roller, is arranged belt on the outside of two rollers, and when cam is acted on belt, belt can follow the rotation of cam, so can be with
Substantially reduce the friction of contact surface.
Compound rivet contacts processing technology according to the present invention includes the following steps：It will be got ready using foregoing feed arrangement
Silver alloy silk material and Copper base material be fed into cold press, compound rivet contacts prefabricated component is made by the way of cold welding；
The prefabricated component is put into vacuum annealing furnace and is heat-treated.Preferably, the vacuum condition is 0.1-1.5Pa.Preferably, institute
State vacuum annealing furnace and include temperature control and monitoring device, monitoring device includes the multiple temperature sensors set in stove, can be with
Carry out each regional temperature of real-time detection；Temperature control equipment can set the soaking time at the temperature and steady temperature in each stove area, protect
The warm time, which reaches, can be automatically stopped heating.Heat treatment step is mainly including the temperature increase rate of temperature rise period, constant temperature stage
The rate of temperature fall of temperature value and duration and temperature-fall period (final temperature is traditionally arranged to be room temperature).Vacuum heat can be with
It is effectively improved the bond strength of compound rivet contacts and prevents the oxidation of silver, while improves the equilibrium of the hardness of product, toughness.
In a preferred embodiment, maximum temperature is 550 degrees Celsius in vacuum annealing furnace stove, is heat-treated specific bag
Include：In-furnace temperature is increased to 350 degrees Celsius according to 140 degrees Celsius of speed hourly, when holding 2 is small, is then taken the photograph according to 120
In-furnace temperature is down to room temperature by family name's degree speed hourly；
In another preferred embodiment, maximum temperature is 550 degrees Celsius in vacuum annealing furnace stove, is heat-treated specific bag
Include：In-furnace temperature is increased to 380 degrees Celsius according to 150 degrees Celsius of speed hourly, when holding 1.5 is small, then according to 130
In-furnace temperature is down to room temperature by degree Celsius speed hourly.
Compare through experiment, being heat-treated front and rear rivet contacts electrician's performance does not have a significant change, and the rivet after being heat-treated
Contact has relative to the prefabricated component before heat treatment in bond strength to be significantly improved.
Referring to Fig. 3, in a preferred embodiment, the made compound rivet contacts of processing technology according to the present invention
With the following size：Head diameter D：2.5-4mm head thickness T：1.5-2mm, head silver layer (the first ag alloy layer) thickness S：
0.4-0.8mm (since there is no oxide layer, silver thickness is than relatively thin), foot diameter d：1-2mm, foot length L：1.5-4mm
Foot's silver layer (the second ag alloy layer) thickness H：0.6-1.8mm, head edge inclination angle theta：20 degree or so.
Claims (1)
1. a kind of rivet contacts processing technology, it is characterised in that include the following steps：(1) silver alloy silk material and Copper base material are prepared,
The silver alloy silk material got ready and Copper base material are fed into cold press using rivet contacts processing feed arrangement, using cold welding
Compound rivet contacts prefabricated component is made in mode；(2) prefabricated component is put into vacuum annealing furnace and is heat-treated, wherein vacuum
Maximum temperature is 550 degrees Celsius in annealing furnace, and heat treatment specifically includes：According to 150 degrees Celsius of speed hourly by stove
Temperature is increased to 380 degrees Celsius, and when holding 1.5 is small, in-furnace temperature then is down to room according to 130 degrees Celsius of speed hourly
Temperature；The vacuum condition is 0.1-1.5Pa；The rivet contacts processing feed arrangement includes cam (11), lever arm (12), thick stick
Bar (15), drive link (13), track (14), connect base (16) and fixed component (17), lever lower end connection lever arm, lever
Upper end be arranged on drive link by means of thread bush in connect base, connect base by means of being bolted, fixed component is with being connected
Projection and groove are respectively equipped with base contacts face, fixed component further fixes connection by means of the cooperation of projection and groove
Base, fixed component are slidably sheathed on drive link, when fixed component along drive link close to connect base when, projection and groove
Realize and coordinate, fixed component is fixed on drive link by means of the screwing bolts of side, and lever arm is adjustably pivotally connected to thick stick
The lower end of bar, lever arm both ends are respectively arranged with a roller, belt are arranged on the outside of two rollers, when cam is acted on belt,
Belt can follow cam and rotate, and cam acts on lever arm so as to drive drive link；Rivet contacts are included positioned at top
First ag alloy layer, the second ag alloy layer and base copper in an intermediate position positioned at bottom, in the second ag alloy layer
Argentiferous ratio is more than the argentiferous ratio of the first ag alloy layer；The silver alloy includes silver, aluminium, copper and chromium, by weight, silver-colored content
For 85-89%, aluminium content 7-13%, copper content 1-2%, chromium content 1-2%；When making silver alloy, first according to the above ratio
Weigh each metal, when placing them into ball mill ball milling 1.5 is small in nitrogen atmosphere, be put into after dry in vacuum melting furnace
10Pa pressure and 1250 degrees Celsius of lower melting ingot castings, when then sintering is squeezed into bar and small insulation 2 under 880 degrees Celsius, extruding
Than for 1: 100；It is eventually fabricated silver alloy silk material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510039965.6A CN104637711B (en) | 2015-01-27 | 2015-01-27 | A kind of rivet contacts processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510039965.6A CN104637711B (en) | 2015-01-27 | 2015-01-27 | A kind of rivet contacts processing technology |
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| Publication Number | Publication Date |
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| CN104637711A CN104637711A (en) | 2015-05-20 |
| CN104637711B true CN104637711B (en) | 2018-05-11 |
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| CN201510039965.6A Expired - Fee Related CN104637711B (en) | 2015-01-27 | 2015-01-27 | A kind of rivet contacts processing technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112735916A (en) * | 2020-12-26 | 2021-04-30 | 福达合金材料股份有限公司 | Rivet type electric contact assembly structure and electric contact processing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587788A (en) * | 2009-06-25 | 2009-11-25 | 温州宏丰电工合金有限公司 | Device and method for producing cold pressure welding compound rivet contacts |
| CN102776408A (en) * | 2012-08-16 | 2012-11-14 | 烟台一诺电子材料有限公司 | Silver alloy wire and preparation method thereof |
| CN202662472U (en) * | 2012-07-20 | 2013-01-09 | 浙江乐银合金有限公司 | Silver-nickel/copper-nickel composite electrical contact |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2908073B2 (en) * | 1991-07-05 | 1999-06-21 | 株式会社東芝 | Manufacturing method of contact alloy for vacuum valve |
| GB2406535B (en) * | 2003-09-30 | 2006-04-12 | P & B Metal Components Ltd | Press apparatus and method for cold forging an electrical contact |
| CN201629246U (en) * | 2009-12-30 | 2010-11-10 | 温州聚星银触点有限公司 | Three-layer composite electric contact manufacturing equipment |
| CN202720908U (en) * | 2012-04-11 | 2013-02-06 | 宁波保税区升乐电工合金材料有限公司 | Triplex contact made of pure copper and silver alloy |
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- 2015-01-27 CN CN201510039965.6A patent/CN104637711B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587788A (en) * | 2009-06-25 | 2009-11-25 | 温州宏丰电工合金有限公司 | Device and method for producing cold pressure welding compound rivet contacts |
| CN202662472U (en) * | 2012-07-20 | 2013-01-09 | 浙江乐银合金有限公司 | Silver-nickel/copper-nickel composite electrical contact |
| CN102776408A (en) * | 2012-08-16 | 2012-11-14 | 烟台一诺电子材料有限公司 | Silver alloy wire and preparation method thereof |
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