and tolerance are what you might expect for a 3/8" (9.5-mm) inner bearing race with zero radial clearance. Since 1989 they had been manually hard-turning this part using a highly modifi ed chucker. The main obstacles to holding close diam- eters in dry hard turning are the thermal effects and the high concentration required of the machinist. Recently, the motorsport divisions of several major European car manufacturers adopted Woodward u-joints. Once the sales of this product grew beyond NASCAR and related American racing, Woodward’s production began to fall behind. "Since by this time we’d already had four Hyundai WIA L210s working beautifully for fi ve years it made sense to investigate the broader Hyundai WIA line. We decided on a KIT-450,” said Woodward. The Hyundai WIA KIT450 is a compact CNC lathe featur- ing gang-type block tooling, which is well-suited for processing small diameter, high-precision parts. “After a day and a half of tweaking the toolpath and coolant dwell time, I had the new KIT-450 holding ±0.00013" [0.003 mm], which was above my
NASCAR driver, Martin Truex Jr. is strapped in and ready to go behind a race car steering assembly comprising com- ponents manufactured by Woodward Machine.
expectations. The next day, the regular operator applied a few more tricks and was easily holding ±0.00010" [0.0025 mm]. After establishing the edge life, which is much longer than before, they now have it down to somewhat tighter than that, and the dimensions are honest and the fi nished journals have no taper or waviness. I should emphasize that this is being done with plain ceramic inserts costing about $1 per edge, not PCD,” said Woodward.
Continued on page 104
DID YOU KNOW…
UNILOCK’S COMPREHENSIVE CLAMPING SYSTEM ENABLES 4-AXIS VMCS TO PERFORM 5-SIDED MACHINING
WHAT THIS MEANS FOR YOU:
+ Flexibility: The bottom of the clamping knob provides a uniform interface with the chuck; the topside is completely flexible
+ Repeatability: The knob also serves as the master datum— improving feature-to-feature accuracy
+ Productivity: Parts and fixtures stay clamped through sequential processes—so you can load, lock and start faster
+ Cost Savings: Modular workholding components reduce your overall fixturing costs and setup time
Stay in the know at
bigkaiser.com/workholding. HIGHER PERFORMANCE. GUARANTEED.
kaiser1651-03 February Ad
Production_Workholding_ME.indd 1 1/13/14 4:19 PM February 2014 |
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