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Cold Forming

What is cold forming?

Cold forming (also called cold forging or coining is a process where material is transformed into new shapes at room temperate in high-tonnage presses. Using a combination of metal preform, special tooling and mechanical presses, unique complex components can be formed.

Where cold heading is typically used to produce bolts/rivets etc, cold forming at NETFORM is used to produce powertrain components such as planetary carriers and splined hubs.

Why cold form?

One of the major benefits of cold forming is work hardening. This strength increase allows the thinning down of equivalent stamping or forging cross sections, saving weight while not impacting strength. Alternatively, for the same packaging constraints, a stronger part can be produced.

This work hardening can also allow the elimination of hardening heat treatments. Part surface quality is such that often the surfaces can be used as-formed. Cold forming allows variable part cross-sections. This, in-turn, provides opportunities for part consolidation.

Design for Cold Forming

Cold-formed components at NETFORM are formed by taking metal preforms and extruding them in knuckle joint presses. This form of extrusion activity allows the parts to be designed with varying cross-sections.

Variable cross sections possible
As-formed oil groove

The NETFORM cold forming process allows features to be provided in the component as-formed. 

The movement of the material during the press-based forming stroke results in cold working and grain refinement.

The end-result is an increase in material strength 2-3 times the base material.

Strength Increase

Case Study

See how NETFORM streamlined cost and efficiency through a redesigned cold forming process.

Read Case Study

Cold Formed Products

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