The Minster E2 HeviStamper utilizes opposing twin helical gears in both its single and double geared arrangements. The advantages of Minster's twin drive arrangement include:
• Improved slide parallelism throughout the working portion of the stroke.
• Virtual elimination of any torsional deflection of the eccentric shaft between connections and main bearing maintaining slide parallelism through the work stroke.
• Improved dynamic parallelism when subjected to off-center loading.
• Decreased punch penetration in snap-thru conditions as a result of twin drive having only 1/2 of torsional wind up of a typical center drive press with the same size shaft.
In addition, twin drives provide increased gear life and reduced noise compared to presses utilizing spur gears. Mounting the gears to their shafts without keys provides improved gear timing and serviceability.
FEA analysis comparing the torsional wind up of a twin drive press to that of a center drive press with the same size shaft shows that when the maximum rated tonnage is applied evenly to each, the vertical deflection of the center drive press is twice that of the twin drive press. The result is a less stiff press and increased punch penetration in snap-thru applications.
Single Geared Twin Drive
Standard on the E2, this drive is rated at a minimum of .25" above bottom of the stroke on 200 thru 600 ton presses; and a minimum of .50" on 800 thru 1600 ton machines.
Double Geared Twin Drive
This arrangement is used where slower speeds are required ... in deep drawing or forming operations. A Combination Clutch and Brake on the slow speed intermediate shaft (a patented Minster "first") gives increased single stroke efficiency with less clutch wear than if the clutch were mounted on the higher speed driveshaft.
-- Back to Features Menu --
