Heavy equipment
Large parts, often in quenched-and-tempered steel, with a lot of stock to remove at roughing. The first question is not the tolerance but whether the part fits the machine - and the second, whether it stays where it was put once the stresses are released.
What parts come from this sector
Large parts, often in quenched-and-tempered steel, with a heavy roughing allowance. Machine travels and fixturing stiffness decide, and stress relief between roughing and finishing is not optional: the stresses released by the first pass move the part before the second.
What decides at quotation
Machine travels and table load decide feasibility before any dimension does. Send the overall size and the mass together with the drawing. Second: removing a large allowance quickly releases the rolling stresses, and the part moves after roughing. That is why stress relieving is placed between roughing and finishing, and functional dimensions are cut after it. A large part finished without stress relieving is a part measured good in the workshop and rejected at the customer.
Usual materials
The groups that most often appear in this sector’s parts. What decides remains the drawing, not the sector label.
Usual processes
The processes this sector’s parts usually go through.
Documentation usually required
Usual: material certificate and a dimensional report on the functional dimensions, taken after stress relieving.
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