Page 44 - MetalForming September 2014

Servos Seeing More Service
So Much More to Servo
Servo presses have huge untapped potential in North America. Metal- formers are traveling the learning curve, as are die designers and builders as well as part designers, specifiers and OEMs.
“In North America, we are using servo in a limited way,” says Randy Kish, regional sales manager for Seyi America, Inc. “Popular uses include heavy blanking—often with advanced- high-strength and dual-phase steels— and essentially creating a high-perform- ance link-motion profile and operating in a pendulum mode. This allows for slowing on the down stroke with a pen- dulum motion negating the need for a full-stroke cycle. The result is a 20 to 30 percent increase in productivity.”
drawings to determine efficiencies via better application of a servo press. The team also works with tool designers and builders.
Seyi conducts testing to demon- strate more sophisticated approaches to forming via servo presses. One oper- ation obtained through this process creates a bevel-like edge on a female part that mates perfectly with the male part, with no secondary operations required.
Precision and productivity in form- ing via servo requires special attention to press design and build, according to Kish. With that in mind, Seyi has focused on the drive, electrical system and press construction in its offerings, which include unitized straightside units in capacities to 600 tons, and tie- rod straightside units to 1200 tons.
tinuous automated stamping, the elec- trical system in general, and the encoder specifically, must mesh. The encoder should connect easily and connections should be accessible and convenient, according to Kish. And the controller should provide program- mability in order to set parameters and motion to match the servo profile of the system. As a result of attention to these components, timing switches can be programmed precisely with peripher- al equipment, ensuring optimal per- formance, says Kish.
As far as press construction, Seyi has addressed that by using a unitized frame with honeycomb construction that improves rigidity and the ability of the press to handle off-center loading. The company’s servo presses, through attention to rigidity and frame design, boast reduced clearance, meaning improved precision and less rumbling or play in the linkages that can sap operation energy, damage the press
Such gains are impressive, but so
much more is possible with a servo
press. Toward that end, Seyi has assem-
bled a servo-forming team, including
tooling expertise, to help metalformers
tap the technology’s potential. The
company can assess customer part sories to form a press system for con- and create bad parts. MF
The company uses its own propri- etary high-torque, low-rpm, air-cooled motor for direct-drive transmissions.
With many users hooking in acces-
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