All hydraulic cylinders employ precision electronic linear transducers to precisely position the entry and exit ends of each back-up flight. Work rolls are tilted front-to-back to eliminate coil-set by adjusting the entry and exit cylinder elevations. Adjusting cylinder elevations across the width of the Leveler accomplishes "work roll bending" for center-buckle and wavy-edge shape correction. Independent back-up flight adjustments front-to-back as well as side-to-side allows the hydraulic leveler to perform more precise shape correction than old mechanical leveler technology.
Hydraulic Cassette Leveler Operator Set-Up Console Display.
Precision Electronic Servo-Feed: Two-sets of widely spaced roller side guides center the strip into the Servo Feed. The guides assure the strip is square with the Servo Feed in order to maintain precise diagonal blank tolerances. A high-traction non-marking Servo-Feed powered by a precision microprocessor controlled AC servo motor feeds and measures the surface-critical strip to precise length tolerances. The Servo-Feed draws the leveled strip from the free-loop and feeds a pre-set length through the Shear. Part lengths are precisely measured by a digital encoder, while a microprocessor automatically establishes ideal acceleration/deceleration rates. Part length and batch count are key pad entered into the digital operating system.
Precision Electronic AC Servo-Feed, processing Surface-Critical Strip.
Servo Feeds compare favorably to "reciprocating mechanical feeders" in productivity and reliability. A reciprocating mechanical feeder grabs the strip, shoves forward to a positive stop, engages holding clamps, shoves the reciprocating clamp backwards, grabs again and releases the holding clamp before starting another feed cycle. Grabbing, releasing, sliding backwards, and re-grabbing consumes the majority of a reciprocating feeder cycle time. By comparison a Servo-Feed simply rotates feed rolls in one direction. The need to make multiple reciprocating feed cycles further diminishes a reciprocating mechanical feeder's productivity when producing long sheets. The Servo-Feed's non-reciprocating operation, low acceleration/deceleration rate, few moving parts, and a total absence of chains, length adjust screws, shock absorbers, limit switches, valves, pumps, slides, clamps, & hydraulic hoses gives it consistent accuracy and "bullet-proof" reliability.
Hi-Speed Shear: The JFE Shoji CTL Line employs a Hi-Speed Hydraulic Shear to produce precise sheets and blanks. The Hi-Speed Hydraulic Shear is capable of a 60-strokes/minute cyclic rate, which is comparable to a mechanical shear cyclic rate. The Shear employs PLC controlled hydraulic cylinders to drive the upper guillotine ram through the cutting cycle. 4-edge shear blades are mounted on the guillotine ram and the lower blade holder. Blade clearance is adjustable from a single point for processing a wide range of gauges and mechanical properties.
