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| Rotary swaging machines are high-speed displacement controlled machines. |
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The stroke of the dies is with the HMP principle created by a cam control. The kinematics are generated in the core of the swaging machine, the so called swaging head.
Each time one set of rollers passes over one set of strikers, one radial forming blow is executed. The radial movement of the strikers is transmitted to the dies and from there to the workpiece. When the outer strikers are located between the rollers they open radialy outwards together with the dies by centrifugal force.
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Advantages of HMP swaging heads are for example:
The outer strikers have a trigonometric profile for smooth, gradually increasing contact when the rollers start passing over the strikers. The rollers are actively driven and rotate continuously without slip at all positions. This prevents rebounding hitting against the strikers at the start of the contact. The machines are equipped with 16 pieces of rollers whenever the size of the swaging head provides sufficient space.
Characteristics:
Minimized wear on strikers: HMP outer strikers are long-life wear parts and do not require thermal treatment during the operation time. This keeps the service and maintenance costs low.
Low elastic work deficiency rate: The characteristic force-die-stroke-relationship minimizes the elastic work deficiency and increases the efficiency. HMP rotary swaging machines operate therefore with optimum energy utilization.
High stroke frequencies: This optimizes the forming process with regard to homogeneity and friction.
Internal Rotating System:
Stationary outer ring - rotating main shaft. The classical construction: robust and simple. When the dies are closed under the rollers they tend to twist the workpiece. These forces are compensated by slow rotation of the workpiece in the clamping jaws with controlled slip.
External Rotating System:
Rotating outer ring - stationary main shaft.The main application of the external rotating system is the production of non-circular forms. When producing cylindrical workpieces, to prevent longitudinal burrs at the positions between the dies the workpiece must be rotationally driven.
Double Rotating System:
Outer ring and and main shaft rotate in opposite directions. The stroke frequency of the dies is independent of the rotational speed of the main shaft. This system has special advantages for swaging of workpieces sensitive to torsion.
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