Cummins Engine Saves Time with Presetting, Shrink Fit
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In a tangential milling cutter, the inserts lie around the pitch diameter (left) rather than on edge (right). This cre- ates a stronger edge presentation for longer tool life and improved process security in heavy roughing cuts.
improved process security and fewer interruptions, but they are invaluable.”
The tests demonstrated that the new tangential cutter could withstand the 40% greater power (10.9 kW vs. 7.8 kW for the radial cutter) requirement necessary to remove the material faster. “Sheppard now has an inherently stronger processing geometry plus a huskier cutter and a larger, more robust insert,” said Bohn. “Together they have completely removed the trigger to the chain reaction that led to their tool wrecks in the first place.” “We’ve gone more than three years now without a single tool wreck or any production stoppage traceable to the tan- gential cutter,” said Smith. “That says it all.” ME For more information on Ingersoll Cutting Tools, go to www.ingersoll-imc.com, or phone 815-387-6600.
he Cummins Engine Jamestown (NY) Plant with 1200 employees turns out approximately 500 heavy-duty diesel engines a day. MAG Mega 800 horizontal machining cen- ters machine the cylinder heads and blocks for the 12-liter engines—eight for the cylinder head machining line and ten for the engine block line. Each machine has 30-40 tools, and 70% of the tools used in the critical machining processes use heat-shrink holders for extreme rigidity during heavy cutting. Cummins engineers saw that valuable production time
could be saved by investing in Zoller tool presetting and heat-shrinking technology. Avoiding tool setting on-machine saves about 5 min per tool, engineers estimated. Typically six tools a day are changed on each machine, which adds up to a half-hour production saved per machine per day. Cummins estimates it is achieving about 20% greater efficiency in pro- duction, thanks to the Zoller off-line presetting. The plant now changes its heat-shrink cutting tools and accurately sets key di- mensions to within microns without interfering with production. The Zoller redomatic 600, a universal presetting, measur- ing, and heat-shrink system, was the choice of the Cummins plant. Used by up to eight operators to exchange the mostly carbide cutters and preset those tools in their heat-shrink holders, the Zoller has dramatically changed the speed and accuracy of tool exchanges, presetting and accuracy. With a 13-kVA induction coil, tailstock and cooling system, the redo-
Thousands of enclosures Hundreds of options Designed and delivered in 10 days
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Thousands of enclosures Hundreds of options Designed and delivered in 10 days
Thousands of enclosures Hundreds of options Designed and delivered in 10 days