Three composite rivet rivet type electric contact belongs to monomer type electric contact replacement products, the original monomer sterling silver or silver alloy rivet type electric contact structure, restructuring of the head and nail with sterling silver or silver alloy materials, using pure copper materials among the three layers of composite structure of the rivet type electrical contacts (three compound contact contact with monomer contrast diagram as shown in figure 1, figure 2) . Syftet är att spara användningen av ädelmetallsilver, vilket minskar produktionskostnaden för kontakt . jämfört med den enda kontakten, varje korn med tre sammansatta beröringskonsumtion med mer än 40%.}
Three composite rivets is the technical difficulties, nail silver layer and composite strength of copper base material, the traditional composite cold forging machine could not be achieved, the reason is that the composite cold forging machine is cold welding forming technique, namely the cold welding is under the action of pressure, make the metal plastic deformation, and a method to implement solid-state welding, the premise that the compound must have the plastic deformation characteristics, in general, the Deformationshastigheten för sammansatt tvärsnitt bör vara större än 60%, kan garantera den sammansatta styrkan . och tre sammansatta typ nitkontakt på grund av det begränsade av strukturen, bearbetning av plastspik av materialdeformation för att uppfylla kraven, så bindningsstyrkans problem är mycket enastående, allvarligt när kan dyka upp även efter att lagret faller av fenomenon {}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}
At present, the special three-composite cold forging machine imported from Germany can realize the processing and production of three-composite rivet type contacts. However, after the nail part is cooled and reassembled, it adopts the dimension work relying on the silver knife, which results in the scraping down of 20%~40% of the contact materials. Therefore, the material utilization rate is low, the recovery cost is high, and Den importerade utrustningen är mycket dyr .
Three composite rivet type electric contact my company's production USES the vacuum diffusion welding technology, its principle is: will the welding workpieces placed under vacuum to protect the environment, through the heating system of heating, in certain conditions, such as temperature, time, atmosphere, make the contact surface between the mutual diffusion of atoms, so as to achieve metallic bond together to form a kind of welding process on the surface of the Svets .Jämfört med svetsning av kallpress är dess svetsningsytebindningsstyrka bättre, kontaktmotståndet är litet och stabilt .
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