Manufacture of metal bellows couplings
Joining instead of gluing
The connections between the bellows and hub are a critical point in the manufacture of metal bellows couplings. The flared press-fit process can be used here.
When manufacturing metal bellows couplings, the connections between the bellows and hub are a critical point. While steel or stainless steel couplings can be joined using a special micro-plasma welding process, this method is not suitable for combinations of aluminum and steel. Bonding methods can be used here, but these can fail under extreme operating conditions (chemicals, very high or low temperatures). Particularly in the case of couplings on the input side of a planetary gearbox, high temperatures can occur in critical applications, which could loosen the bonded joints.
The joining process developed and patented by Jakob (cone crimping process), on the other hand, is suitable for connecting multi-layer stainless steel bellows to aluminum hubs without play. Here, operation is also safely possible in temperature ranges from -50 °C to +350 °C.
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