An Example in Steel  Casting  --  Lever Arm in the BMW Engine Valve Train

Clean, Cut, Anneal, and Machining 

Automated Boring Operation

After ceramic shell removal, the lever arm castings go through several operations to prepare for precision machining, surface treatments, and inspection.

  • Castings are abrasive blasted and caustic cleaned to remove shell sand residue. 

  • The gate stubs are laser cut off.

  • The castings are annealed in methane for carbon restoration

  • The two bearing holes are bored to a 50 micron tolerance.

 

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Last Modified:October, 2003 by STG

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