Page 38 - MetalForming-Sep-2018-issue

Servo Technology
of motion, we can slow down only that portion of the motion profile but main- tain optimum speed of the other axes. In addition to discussing the power of the software to engineer transfer motion, my presentation will look at how to design for production rather than simply making a good part.”
Example: Don’t place a gauge right next to a transfer finger, Chamberlain says, which would require the transfer system to lift significantly higher to clear the gauge before indexing the part forward in the die. Instead, take care to locate gauges, pins and bush- ings so as to not impede transfer motion.
“In the end,” he says, “tooling designed for production allows us to ‘share time’ in the transfer cycle, so that the transfer system can index along two or three axes simultaneously, reducing overall cycle time.”
Fast Feed
Similar to the notion that the press
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November 6-8, 2018 Georgia World Congress Center Atlanta, GA, USA
line can only cycle as quickly as its slowest-moving part, manufacturers of feed equipment have been busy of late perfecting their wares to work in concert with the servo press. Key among improvements, according to Mike Roy, regional sales manager with feed-system supplier Formtek-Maine: feeds that are electronically geared to the press, to ensure accurate, precise feeding at the highest possible press speed.
“In pendulum mode, which we know enables very high press speeds,” Roy says, “we chop off the feed time— there’s less time to move the material. This means that we have to feed the material faster than ever, yet avoid slip- page. Feed suppliers, as I’ll explain in my presentation, have, therefore, opti- mized the development of four-roll feed systems. These setups optimize the surface area of the feed rolls in contact with the workpiece material to ensure a good grip and precise feed with each press stroke.”
Also on Roy’s agenda: discussion of servo-based pilot lift, another speed enabler.
“This technology,” he explains, “replaces the use, in a conventional mechanical press, of a programmable limit switch or, in some cases, a prox- imity sensor on a cam to signal roll lift and initiate the feed.”
Servos in Action
So, where do we see applications for servo technology shining in today’s pressrooms, and in the pressroom of the future?
Many stampers have found that deep-draw and blanking processes can be dramatically improved by perform- ing the work on a servo press instead of a conventional mechanical press. Servo Experience attendees will hear first-hand from researcher David Diaz- Infante, from the Ohio State Universi- ty’s Center for Precision Forming (CPF), details of such process enhancements. Recent CPF studies focus on drawing
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Japanese Tier One Automotive Supplier
Fully programmable slide motion allows for optimized blanking and forming operations
Increased productivity using Pendulum motion
Direct drive technology with capacitor bank energy management system
Tonnage Monitoring, Die Protection, Programmable Timing Switches, Remote Diagnostics are all standard
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