Sunday, October 13, 2013

Tooling failures

Tooling failures that can occur are abrasive and adhesive wear, chipping, deformation, galling, catastrophic failure and stress fracture.Tool Failure is another good reason to cryogenically treat.

Abrasive wear results from friction between the tool and the work material. Adhesive wear occurs when the action the of the tool being used exceeds the material’s ductile strength or the material is simple too hard to process.

Adhesive wear causes the formation of micro cracks (stress fractures). These micro cracks eventually interconnect, or network, and form fragments that pull out. This “pullout” looks like excessive abrasive wear on cutting edges when actually they are stress facture failures. When fragments form, both abrasive and adhesive wear occurs because the fragments become wedged between the tool and the work piece, causing friction this can then lead to poor finish or at worst catastrophic tool failure.

Catastrophic tooling failures can cause thousands of dollars in machine damage and production loss. This type of tool failure can cause warping and stress fractures to tool heads and decks as well rotating and load bearing assemblies.

Cryogenically treating industrial tools reduces abrasive wear and tool failures.

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