Production Machining

MAY 2018

Production Machining - Your access to the precision machining industrial buyer.

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Integral-motor turrets that use anti-backlash, roller gear cam drive systems deliver smooth, high-speed, high-accuracy digital indexing as well as expandability. Such versatile turrets typically house 12 tool positions with the ability to expand to as many as 24. Increased tool capacity equals longer uninter- rupted run times and the ability to use more common tooling, which helps reduce overall tooling inventory. is turret design eliminates the need for curvic/index couplings, and expandability is possible because the turret indexes digitally to any position without changes to its housing. And once in position, integral hydraulic clamping systems are typically used to ensure maximum rigidity. As is the case with their upper counterparts, Mr. Wilker states that lower turrets on multitasking machines also continue to evolve and expand in terms of capabilities, along with their tooling capacities. Lower turrets are now more robust and powerful and typically offer as many as nine tool positions with options for live milling spindles. Some machine builders configure turrets on 45-degree slants. is design maximizes the turret's machining load capacities and provides ample accessibility to the machine's spindle and room for part transfers from main to secondary turning spindles. For increased productivity and part processing versatility, lower turrets can work simultaneously with upper turrets on the same workpiece. Or, lower turrets can work in combina- tion with a machine's milling spindle that can be applied to either side of the machine's headstock to further reduce machining cycle times. Today's multitasking machine turrets feature rotary tool spindles that implement direct-drive technology that make them faster and more powerful than their predecessors. Direct- drive mill motors deliver spindle rpm that is as much as 24 percent faster, along with torque levels that are as much as 60 percent higher. ese capabilities equate to boosts in processing versatility, productivity and tool life along with improved part surface finish quality. Shops can acquire multitasking machines with turret rotary-tool spindles that deliver 10 hp and 6,000 rpm as standard. Or they can opt for those that deliver as much as 10,000 rpm and generate as much as 52 foot-pounds of torque. e latest NC servo-driven tailstocks enable automated processes. ese tailstocks are fully programmable and run on their own AC servomotors and ballscrews. rough part programs, the tailstocks can extend to known positions and with specified approach feed rates and make contact with workpieces at consistent holding pressures. Because of their positive independent drive systems, these tailstocks can also drill holes on shaft centerlines, adding versatility to the jobs a multitasking machine can process. In most instances, tailstock thrust settings are adjustable in increments of specific foot-pounds of force. is feature allows :: Lowell Inc. eliminated manual operations and increased overall throughput with three multitasking machines that provide complete part processing capability in a single setup. :: The QTN350-II MSY multitasking machine features milling and Y-axis capabilities as well as a second turning spindle, allowing LCP Machine Inc. to machine very small, highly complex features on medical implant components. Multitasking in Today's Shops :: 37

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