Modern Machine Shop

NOV 2018

Modern Machine Shop is focused on all aspects of metalworking technology - Providing the new product technologies; process solutions; supplier listings; business management; networking; and event information that companies need to be competitive.

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Page 107 of 155

BETTER PRODUCTION MMS NOVEMBER 2018 106 LE AN MANUFACTURING number of inserts from 13 to 11 and—since the number of cutting edges went from four per insert to 14—substantially reduced tooling cost per part. Through these tooling changes, cell output was more than doubled. Stabilizing the Turning Cell On the Okuma turning cell, casting imperfections made the process for machining rear pinions unpredictable. Operators had to change tools frequently, causing unacceptable downtime. The operations on the twin-spindle lathe were also unbalanced, making op. 10 a bottleneck while op. 20 sat idle. Finally, change-over was a time-killer, requiring upward of 6 hours. The team set itself an internal goal of shortened cycle time, improved tool life and a more stable process. They started by implementing a CoroTurn Prime all-directional turning tool as well as sev- eral other multifunction grooving and boring tools to turn the rear pinion. No lengthy repro- gramming was required, but because Prime was able to combine roughing and finishing into a single tool, and also cut more effectively than the legacy solution, this change reduced cycle time by more than half. Shuffling two of the turning operations and moving to a special-order Coromant drill with back-chamfer capabilities shaved another 1.5 minutes off the cycle time while making the entire turning process more predictable. A completed axle housing emerges from Volvo Powertrain's Heller H 5000 four-axis HMC. VR8 THE AFFORDABLE 877.689.1860 | Energy efficient and heat minimizing, the VR8 automatically adjusts coolant flow to maintain set pressures of up to 1000 PSI. Either of the two 5 micron, quick-change, high capacity filter bags can be replaced while the pump is running. Ask your machine tool dealer for a quote today! Variable Volume High Pressure Coolant System Demand Quality – Insist on MP Systems

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