Tube, pipe, steel, machine tool, CNC, tube bending, steel bar, aluminium welding, bending steel

Features of parts being produced through rotary rotary swaging

Depending on the amount of reduction in the cross-section of the blank, and on the hardness of the raw material, we can get a corresponding increase of the tensile strength of semi-worked part. This advantage of cold-forming allow to use materials with a reduced strength, having therefore a supplementary saving on costs. At the same time, admissible loads on parts can be also higher.
As a further benefit, internal tensions generated by the compression of fibres on parts surface, may increase their strength to alternate deflection.

Our experience also showed that reduction of the cross-section we can get from each swaging step are higher than the ones we can get from cold-drawing, or push-forming.

It was also proved as sections being rotary swaged can generally be further cold-formed through other systems, without having to be annealed before, thanks to a remaining elongation capacity.
As much as the cross-section of material is reduced, as much the corresponding quality of the surface improves. Opposite to the surfaces produced through chips-removal, parts produced with rotary swaging have a very low roughness, and a better resistance to friction.

Possibility of use
Rotary swaging applied to solid bars, tubes and wires, beside other raw materials, such as extrusions and profiles allows to reduce their cross-sections, to change their profile, reduce-down and straighten without chip-removal. Parts can be either swaged just on a portion of their length, or all along their complete layout without interruptions. In some cases, two parts can be mechanically locked one inside the other, after having matched the two parts together. Metal wires can be downsized, while profiles and tubes can be profiled inside, or outside.

n most cases, are cylindrical blanks to be cold-formed in a rotary-symmetrical section. However, it's also possible to swage down some profiles starting from sections which are not cylindrical.
For instance, it's possible to produce square- or hexagonal-sections, etc., out from cylindrical blanks.

Tubes and hollow parts may be swaged down on internal mandrel,
therefore sized inside and prepared with a inner profile (splines, square- or hexagonal-hole, etc.). Tolerances we can get from rotary swaging are comparable to the ones available from modern chip-removal machine tools. These tolerances depend on the forming degree, on quality of dies and on parts diameters, ranging from +/- 0.02 mm. and +/- 0.2 mm. in the average.

Almost any material may be processed through rotary rotary swaging, provided they have enough elongation capacity. Oftentimes, is also possible to operate hard-carbides at low cost.
Semi-worked tungsten materials, and high-tensile nickel-alloys allow to be rotary swaged and - in some cases, whenever necessary - these blanks can be introduced as pre-heated into the machine.