Sesco Products Group -
Tier One Automotive:
Oscillating Shear/Roll Feed
System
SESCO Products Group Provides Oscillating Shear, Die and Roll Feed to Major Tier One Automotive Supplier
Coe Press Equipment Corporation’s SESCO Products Group (SPG) has installed a unique in-press oscillating shear, die and electronic roll feed at a major Tier One automotive supplier in Detroit, MI to meet the company’s stringent demands for class A blanks and flexibility to handle various blank sizes.
The company is a multi-conglomerate, European-based company with steel production and fabricating operations located throughout the world. It is a Tier One supplier to the automotive manufacturing companies. At this Detroit plant, it provides coil stock for blanking and slitting operations for automotive parts directly to automotive plants as well as its own production stamping facilities.
SPG’s oscillating shear and die package is part of a full coil processing/blanking line that includes a coil transporter, coil storage turnstile, coil reel, precision leveler, feeder, electro-static oiler, shear and blank stacker.
The package included an oscillating shear, die that can rotate a maximum of ±30°; blank eject conveyor, dampening control adapter, shear “bump” die design and self-centering adjustable stock guides.
For oscillation, SPG’s oscillating shear die uses a rack and pinion with servomotor for movement. It incorporates a “bump die” design for operation in a conventional straight-side press and includes a dampening feature to allow higher strokes per minute. Cycle times are determined by the press, feed, and shear oscillation speeds. All adjustments to the angular movement of the die can be controlled and programmed at the operator console.
Maximum output of the die is 60 SPM at zero degree oscillation or straight cut mode. The overall blade length is 84” and the approximate tool size is 112” right to left and 120” front to back. The shut height is 33.12” and the material thickness range is from 0.020” to 0.110”. The cut angle and production rate ranges from ±30° at 30 SPM ±5° at 50 SPM. The minimum coil width it can handle is 16”.
SPG’s electronic roll feed is designed to process a coil width range from 16” to 76”, feed length range from 24” to 186” and provide a line speed of 300 FPM. The feed rolls are hardened and ground and provided with a controlled matte-chrome finish to minimize slippage and foreign material build up.
Besides the oscillating shear and roll feed, SPG also installed a unique threading table and two material support catenaries to feed the coil stock into and out-of the loop pit. The high production speeds and feed rates demanded a great amount of coil to be fed, the loop pit had to be 18’ deep and the catenaries were provided with hold downs. This called for an unusual threading table design. Most threading tables are designed with two halves split down the center (like bomb-bay doors on an airplane) and join together to support the coil being threaded to the roll feed. When the table opens to allow the coil to loop into the pit, the table halves retract to above ground level height.
Since this company’s loop pit was so deep, this conventional design couldn’t be used. SPG built a special thread table that moved by a chain drive mounted to a wall from the bottom of the loop pit to the top. This design also was effective in keeping the coil, in a tail-out condition, from being damaged in the pit while it was being fed into the press. The table rises to lift the tail strip as it is being fed.
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