For anyone not directly connected to this specialist area of the engineering industry, ‘what is swaging?’ is a very valid question.
Put simply, rotary swaging is a rotary hammer forming process in which a tube or bar is shaped. Swaging involves tooling being produced which revolves around the workpieces as it is fed into the machine. The dedicated tooling has the relief form of the profile required machined into the internal section.
By reducing the cross-sections of the material, we are able to use rotary swaging to transform the diameter of an object, either externally or internally. Using this process, we are able to apply either a ridge, a groove or change the shape of the tube or bar/wire.
The main application of rotary swaging is the production of circular, concentric reductions on one / both ends of the workpiece or in the centre section. The process may also be used in producing 'irregular' forms e.g. hexagonal, octagonal and square sections. We regularly use the process in this way for work in the electronics and aerospace industries.
Rotary Swaging as a process, can be dated back to the early 20th century, however, technology and advanced machinery have made the process much more efficient.
At Techniswage, we continuously invest in the latest machinery to assist us in increasing the capacity of our swaging services and the diversity of the industries that we are able to supply.
The majority of components are formed in a cold state and as a consequence, the following are typical advantages of cold forming:
- Short cycle times
- Good surface finishes
- Tight tolerances
- No material loss -near net forming
- Gains in wall thickness
- Better grain structures
- Increased strength and hardness.
As a result of 'work hardening' from the rotary swaging process, cheaper materials may be used, with savings in material weight and wall thickness. Practically all metals are suitable for rotary swaging including low carbon, high alloyed steels and stainless steels, non-ferrous and precious metals.
Tolerances on 25mm Dia. Of 0.01mm with finishes of Ra 16u are achievable.