Modern Machine Shop

DEC 2016

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.

Issue link: https://mms.epubxp.com/i/754119

Contents of this Issue

Navigation

Page 26 of 164

24 MMS December 2016 mmsonline.com ONE-OFF Commentary "cutting edges." Because fresh media is con- tinually introduced into the stream, the stream's cu t ting e dg e s a re a lways s ha r p, minimizing the chance for delamination or leaving behind burred edges. When milling is the only viable process, the shop uses balanced, HSK shrink-fit toolholders to min- imize tool runout and prevent cutters (primarily diamond-coated tools) from wearing non-uniformly. Because most of its composite workpieces are relatively thin, it will also routinely alter the depth that a tool reaches through a workpiece to get the most out of a tool's total available flute length. • Wood—One of my favorite shops I've visited was Thorn Custom Guitar (you might not find that surprising given my Motorhead reference earlier). In "CNC Machining Fuels Guitar Innovations" ( short.mmsonline.com/thorn ), Ron Thorn explains how he prefers a "metalworking VMC" to a con- ventional router to machine contoured wood guitar bodies and related components, liking that a VMC offers automatic tool-changing capability and an enclosed machining environment to contain sawdust. The tools he uses have a down-cut geometry, in which the flutes spiral down into the workpiece. If an up-cut flute geometry were used, then the action that brings chips up and out of a workpiece would also cause the wood to fray at its top edge. He also uses an atypical workholding method to secure thin fretboards and inlay material for machining: double-sided industrial tape. The 0.007-inch-thick tape creates a very strong bond between flat workpieces and a tooling plate. In fact, the bond is so strong that acetone must be used to free workpieces from the tooling plate. These are just a few examples of articles we've written detailing the machining of non-metallic materials. You can find others by searching our newly redesigned website at mmsonline.com . If your shop happens to machine some tricky non- metallic materials, let me know. Perhaps we can similarly highlight your successes in Modern Machine Shop.

Articles in this issue

Links on this page

Archives of this issue

view archives of Modern Machine Shop - DEC 2016