Liebherr has developed a gear-hobbing machine that applies a multi-cut strategy, including press deburring. Continual loading and press deburring occur in parallel during machining time. Separate machine operations take place ton two machine tables, each able to swivel 180° and easily accessible, roughing in two phases—pressing, and finishing. After the blank is locked in and tightened, it is swiveled, and the first cut of the gear takes place on table 1, while the chamfer is produced by pressing on table 2. After another swivel, finishing takes place in order to eliminate the bulging that occurs as a result of pressing. The finishing process is key to this cycle. It is a stand-alone process not subject to crossover impacts generated by a parallel process on the neighbouring table.
“We chose this strategy, since external mechanical encumbrances should be excluded during machining, especially during the precision finishing process,” Dr. Hansjörg Geiser said. “The quality of the components of the flanks in particular and the reliability of the process as a whole benefit from this. The blanks are loaded from the attached palletizer cell, where they are stored in baskets, as per the automotive standard.”
For more information, contact Thomas Weber at +49 (0) 831 786-3285 or email him at Thomas.Weber@Liebherr.com.
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