Schmiedewerk Stooss AGMaienbrunnenstrasse 8CH-8908HedingenT +41 43 322 62 00F +41 43 322 62 01
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CUTTING



Material Inspection

Inventory of square and round billets and ingots

Billets in condition:

hot rolled

casted

continuous casted

forged









Cutting Departement

Cutting of square billets
Cutting of round billets



Weight control
Visual control

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FORGING

Hammer Forging

Starting stock, held by manipulator




Open-die forging





Progressive forging

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Open-Die Forging


Starting stock, held by manipulator




Open-die forging





Progressive forging
Visual and dimensional control

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ROLLING

Ring Rolling

The ring rolling process typically begins with upsetting of the starting stock on flat dies at its plastic deformation temperature – in the case of grade 4340 steel, approximately 1250° C.

Piercing involves forcing a punch into the hot upset stock causing metal to be displaced radially, as shown by the illustration to the right.


The doughnut-shaped preform is slipped over the ID roll shown here from an “above” view.




A side view of the ring mill and preform workpiece. Workpiece, thus squeezing it against the OD roll which imparts a rotary action...

...resulting in a thinning of the section and a corresponding increase in the diameter of the ring. Once off the ring mill, the ring is then ready for secondary operations such as close tolerance sizing, parting, heat treatment and test/inspection.
Visual and dimensional control

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HEAT TREATMENT

For example

normalising

quenching and tempering

annealing

soft-annealing


Water quenching




Oil quenching





Data recording





Heat treatment cycle
Hardness testing

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TESTING


Microetch
Grain structure




Charpy Impact Test





Tensile Test





UT-Testing

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MACHINING

Machining


Programming




Turning




Turning balls





Final documentation
Shipping

System by cms box