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.

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140 MMS December 2016 mmsonline.com MODERN EQUIPMENT REVIEW Spotlight: Machining Centers load capacity of 11,000 lbs and a maximum part size of 78.72" in diameter and 58.07" high. X, Y and Z axes measure 86.61" × 58.07" × 64.96", with rapid traverse rates of 1,653 ipm. Built on an integral bed and base, the machine is designed with reinforcing ribs for increased stability and load-carrying capacity. The machine series incorporates Okuma's Thermo-Friendly Concept to achieve maximum thermal stability and accuracy. Okuma America Corp., call 704-588-7000 or visit okuma.com/americas. ULTRASONIC MACHINING CENTER CAN BE EQUIPPED WITH 1,500-RPM TURNING TABLE DMG MORI's second-generation Ultrasonic 20 Linear extends the company's offering of ultrasonic machining centers. Oscillating contact interrup- tion results in improved lubrication and cooling of the cutting edge as well as increased removal of particles from the active zone. This enables longer tool life and surface qualities ranging to under 0.1 micron Ra on hard, brittle, dif ficult- to-machine materials. According to the company, t h e m a c h i n e o f f e r s h i g h m a t e r i a l r e m o v a l rates, accurate edge machining and reduced process forces in the machining of advanced materials such as glass, ceramics, corundum, composite materials and hard metal. The machine is designed to minimize deflections while increas- ing workpiece accuracy and process reliability for users in the optical, clock and watch, medical, and high-precision mold construction sectors. The machine is now capable of handling larger tool diameters ranging to 2.0". Maximum workpiece weight is 33 lbs, increased from 22 lbs in previous versions. The basic machine is equipped in with a 19-kW, 42,000-rpm motor spindle and HSK-32 toolholder. Higher speed requirements are met with an optional spindle that offers 60,000 rpm. An HSK-40 spindle, optionally with permanent grease lubrication, is also available. The machine can be equipped with a 1,500- rpm mill-turn table, which expands complete machining to include milling, turning and grinding of rotational-symmetrical components in a single setup. In addition to the standard 24-fold tool- change r with pickup, the chain maga zine is optionally available for 60 tools. Other features include a digitally controlled ultrasonic generator as well as ultrasonic actua- tors with enhanced performance, the company says. Toolholders with adapted actuator technol- ogy are changed into the milling spindle auto- matically. Each of these holders contains piezo elements, which are activated by a program- controlled inductive system with a frequency of 20 to 50 kHz. Tool rotation is superimposed with an additional tool movement in the longitudinal direction so that a defined amplitude ranging to 10 microns, which can be programed in the NC program, is generated on the cutting edge of the tool or on the grinding layer. DMG MORI USA Inc., call 855-364-6674 or visit dmgmori.com. VERTICAL JIG, BORING, DRILLING MACHINE CAPABLE OF FIVE-A XIS MACHINING Methods Machine Tools offers the Yasda YBM Vi40 five-axis vertical CNC jig, boring and drilling machine designed for hard milling applications and complex dies, molds and components in the aerospace, defense, automotive, medical and electronics industries. According to the company, the machine produces good sur face finishes without requiring secondary finishing and performs five-sided machining in a single setup. The machine provides simultaneous five-axis cone machining circularity of 2.32 microns, Y-axis accuracy of 0.89 micron, and indexing accuracies

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