Subcontract Flow Forming

Shear-Forming

A pre-form (flat blank or preformed blank) is fastened on the shear-forming tool with a pressure plate and rotated by the main spindle drive. The pre-form is moved along by a friction lock. The shear-forming rollers are applied locally at the circumference, starting from the bottom to the opening diameter of the pre-form. The direct pressure effect of the rollers plastically deforms the material and produces the workpiece in one shear-forming overrun. Material is reduced under mathematic conditions, the so-called shear-forming law.

Profiling

When profiling, a pre-form (flat blank or deep-drawn bowl) is centrically clamped against a tool held in the main spindle by a pressure plate and rotated. The pre-form is taken along by a friction lock. Profiling takes place in several forming stages, with several forming rollers with different outer profiles in sequence applying the pre-form onto the chuck and generating the desired outer profile of the workpiece. The pressure effect of the outer profiled forming rollers plastically deforms the material.

Flow Forming Process

Metal-spinning includes fastening a pre-form (flat blank or preformed blank) centrically against the mandrel with the pressure plate and rotated by a friction lock via the main spindle drive. The spinning roller is locally applied to the circumference of the pre-form. The direct pressure effect of the spinning roller gradually applies the material to the tool in an alternating sickle-shaped movement between the bottom and the edge of the round. Then the finished part is put into its final shape by the smoothing overrun.

Grob-Forming

The Grob cold forming procedure is based on the principle of breaking up the general forming work to be produced into many individual forming steps. A pre-form (e.g. deep-drawn bowl) is pushed onto an interlocked tool mandrel and fastened with a pressure plate. Two rollers facing the mandrel on either side rotate around one axis each to form the pre-form according to their geometry and that of the tool mandrel by plastically deforming the material by touching the outer-most point of their circle. The mandrel is turning synchronously in time to the rotating rollers so that rotation of the rollers by 360° according to the rotating angle of the mandrel to the component area to be formed subsequently, takes place. At the same time as the rotating movement, the mandrel is evenly axially advanced so that the pre-form is formed in the axial direction via the workpiece height to be produced.

Flow-Forming of Clutch Carriers

Flow-forming includes a pre-form (pressed, turned, drawn, forged) being pushed onto a flow-forming mandrel held by the main spindle with low tolerance. The pressure plate fastens the pre-form to the mandrel. The main spindle drive rotates it. The pre-form is moved along by a friction-lock. Flow-forming is applied to the circumference of the pre-form locally. The direct pressure effect of the roller plastically deforms the pre-form material. The defined axial movement of flow-forming leads to the starting wall thickness of the pre-form s0 being reduced to an adjustable final wall thickness of s1, while the starting length L0 of the pre-form extends to the final length L1. The inner contour of the workpiece is formed directly by the spinning roller mandrel (imaging procedure). In this manner, high-quality workpieces with an inner profile can be produced if the mandrels are shaped accordingly.

Flow-Forming Cylinder Tube

Flow-forming includes a pre-form (pressed, turned, drawn, forged) being pushed onto a flow-forming mandrel held by the main spindle with low tolerance. The pressure plate fastens the pre-form to the mandrel. The main spindle drive rotates it. The pre-form is moved along by a friction-lock. Flow-forming is applied to the circumference of the pre-form locally. The direct pressure effect of the roller plastically deforms the pre-form material. The defined axial movement of the flow-forming rollers leads to the starting wall thickness of the pre-form s0 being reduced to an adjustable final wall thickness of s1, while the starting length L0 of the pre-form extends to the final length L1. The inner contour of the workpiece is formed directly by the spinning roller mandrel (imaging procedure). In this manner, high-quality workpieces with an inner profile can be produced if the mandrels are shaped accordingly.

Deep-Drawing