Modern Machine Shop

NOV 2017

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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BETTER PRODUCTION Shops Using Technology 120 MMS November 2017 mmsonline.com out of alloy steels, cast iron, 300- and 400-series stainless, magnesium, A36 plate, Inconel, and Zeron 100 for the oil and gas, aerospace, firearm, and medical industries. Many of the parts the company makes require hole boring. For example, one part is made of 48-HRC 4140 steel and requires a 22-inch-deep hole with an internal diameter of 4.3 inches and an external diameter of 3.97 inches. It also requires milled slots, diametrical tolerances of ±0.001 inch (0.025 mm) and a surface-finish requirement of 32 Ra. This may sound difficult to accomplish, but according to Mr. Shahinian, "It's a typical part for us." To tackle complex boring operations like this and make them stan- dard for the company, Mr. Shahinian says the s h o p u s e s d a m p e d t o o l s f r o m S a n d v i k Coromant's Silent Tools l i n e. T h e s e to o l s a re d e s i g n e d t o r e d u c e vibration and thus chat- te r, w h i c h i n c r e a s e s p r o d u c t i v i t y. T h i s i s accomplished via high initial dynamic stiffness coupled with a tuned- mass damper system i n s i d e th e to o l b o d y. T h e s e f e a t u r e s a r e designed to minimize vibration in longer over- h a n g s ( g r e a t e r t h a n 7× D i n t u r n i n g ) a n d improve productivity in s h o r t e r o v e r h a n g s (4-7×D in turning). The damped tools are also d e s i g n e d to i m p rove p r o c e s s s e c u r i t y t h r o u g h s t a b l e a n d vibration-free cutting, improve surface finish by eliminating chatter or witness marks, and reduce cost per com- ponent by increasing productivity. The com- p a n y b e g a n u s i n g the line of tools when Sandvik introduced it in the early 1980s, and S & K 's to o l c r i b n o w Sandvik Coromant Inc., call 201-794-5000 or visit sandvik.coromant.com. A large, enclosed cutting envelope of our redesigned Hybrid Mill® delivers the power, speed and performance you need for non-ferrous and advanced materials. The twin-table configuration allows pendulum cutting – or electronically synchronize to create one large table. Adding an additional spindle-head (optional) allows simultaneous machining and doubles output within the same footprint. Call today to learn more about this unique CNC platform. [ F148HM24 ] HYBRID MILL 120 Technology Drive • Troutman, NC 28166 info@cronsrud.com | 704.508.7000 | www.cronsrud.com #adapt © Copyright 2017, C.R. Onsrud Incorporated. All rights reserved. MMS - 11|2017

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