Grinding


High performance drill Ø 1.5 mm, fl ute length 150 xd, coolant holes Ø 0.05 mm, lip height variations < 2µm, setup time less than 15 minutes.


Ground with the new GrindSmart®


528XF. The smart choice.


Please visit us at: IMTS 2014 Chicago North Hall, Booth N 7200


“We can grind a wide variety of materials, including alu- minum, carbide, diamond, ceramic, different steels, Inconels, Hastelloys on the Macro standard with wheels to 16" [406- mm] diameter and up to 6" [152-mm] wide. The challenge is to choose the right kind of wheel and dresser for the material being ground,” said Lefebvre. “Aircraft part materials, for ex- ample, tend to be very gummy so most of the time you would spec-out an aluminum oxide wheel with an overhead dresser on it. Also different rotary axes can be put on the machine to grind compound forms. Vitrified CBN wheels, which are dressed with diamond rolls or single point dressing or disks, are used for fast stock removal with very little wheel wear in the automotive industry which tends to use a lot of steels that are case hardened,” said Lefebvre.


“For materials that get gummy and that tend to stick to the grinding wheel, we have five different diamond dress- ers—everything from overhead dressing, intermittent dressing to continuous dressing with table-mounted dressers and roll dressers. For every application, it’s important to spec-out the proper options for the job and design the machine, tooling, and fixturing to optimize the application,” said Lefebvre. “Inconel aerospace parts with thin walls where heat is a big issue, for example, require choosing the right wheel and the right configuration of coolant nozzles.”


Micron Macro machines are available in sizes from the smallest footprint Macro S with X-axis travel of 12" (305 mm), the Macro standard with a 24" (610-mm) X-axis travel and the Macro L with a 36" (914-mm) travel in X axis. All machines have 14" (356 mm) in the Y axis and 12" (305 mm) in the Z axis. “About 70% of our Micron Macro creep-feed grinding machines are fully automated with robots and loaders, espe- cially for cellular configuration for automotive applications,” said Lefebvre. “Typical automotive parts are connecting rods, valve train parts, and piston rings.”


www.rollomaticusa.com solutions@rollomaticusa.com


PCD Cutting Tools Need Grinding, EDM, Laser Combos It’s well known and often reported that automobile and commercial aircraft manufacturers are under the same pressure to improve the fuel economy and performance of their products. Reducing powertrain, engine, and vehicle weight is a key tactic. Automakers, for example, have light- ened engine blocks that are machined from tough, high- silicon aluminum alloys. Aircraft manufacturers are select- ing difficult-to-machine nickel alloys for engine designs that must rotate faster, run hotter, and burn cleaner. Lightweight


84 ManufacturingEngineeringMedia.com | June 2014


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