Shop Solutions
[152-mm] long. Although we eventually grind these parts to size after hardening, some of them require intermediate operations such as hobbing and milling, which absolutely must start with an accurately turned and centered workpiece.
When there’s a lot on the line, preparation matters.
When it comes to oil and gas pipelines, surface preparation is of the utmost importance. You need reliable results and guaranteed rust-free surfaces.
Rosler has specialized in superior shot blasting and peening equipment for over 50 years. Our integrated system solutions provide precise, repeatable processes to meet the strict profile requirements of today’s pipeline industry.
Just about all our parts have to be held within 0.001" [0.03 mm] on the diameter right from the fi rst operation. We do all our turning with cermet inserts and fi nd that with the Hyun- dai WIAs we can run near the upper limit of SFM, which is where those inserts really shine. The harder grades of cermet are vulnerable to thermal shock, so we turn steel dry,” Woodward said.
Rosler Metal Finishing USA, LLC is the leader in mass finishing, shot blasting, automated processes and media - made in the USA.
Visit
www.rosler.us or call 269-441-3000.
A typical part machined on the Hyundai WIAs would be a 3" (76-mm) diameter steel part turned from a slug like the pull ring for a NASCAR steering wheel quick release unit. “It’s quite thin, with less than 5% of the material left after machining. The rest is chips. For an old lathe hand like me there are few things more satisfying than being able to rip steel off to the absolute limits of the holding power of the chuck, without chatter and without compromising the fi nish or accuracy. The Hyundai WIA’s will do that in spades,” Woodward said. For bar work, the operators change- out liner bushings and chuck jaws, download the program, touch off the tools, graph it and go. For second operations, they’ll rebore the jaws fi rst. In the interest of speed, Woodward doesn’t get too upset if a few parts are sacrifi ced while fi ne-tuning the offsets, at least in the initial stages of the part. In a job shop, it would be different, but here if they get 495 fi rst-operation parts instead of 500 it doesn’t matter. The convenience of the Hyundai WIAs has defi nitely allowed shorter runs than was the case with their older turning centers, and that is a big plus. Woodward turns the bearing trun- nion (also known as a bearing “cross”) for their universal joints directly to fi nished size from a 6150 near-net- shape investment casting pre-hardened to Rc
60. That hardness requires straight ceramic, also without coolant. The fi nish
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ManufacturingEngineeringMedia.com | February 2014
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