Fab Tech Fabrication Technology Associates, Inc. PO Box 2309, Crosby, TX 77532 Phone: (281) 328-3700   Fax: (281) 328-3722

Stamtec Link Drive Presses

How Link Drives Work

A link-drive press's main advantage has to do with the ram's motion. During the work stroke (the bottom of the stroke), slide velocity is reduced by as much as 50 percent, allowing metal forming to occur more slowly and with less heat buildup. The ram's fast speed during its approach and return compensates for the slower work stroke. The optimized kinematics of the link design can result simultaneously in higher speeds, better-quality parts, and longer tool life. Whereas speeds on standard crank-driven presses range from 25 to 30 strokes per minute (SPM), link presses typically average 35 to 40 SPM. Reduced Speed Reduces Springback The reduced speed during the work stroke allows time for extended metal flow, so less material springback occurs. Since link drive presses stretch the material at slower speeds, tighter part tolerance are achieved. Wear life of die surfaces and components such as draw cushions is longer because factors such as noise, heat, shock, and vibration are reduced.

The biggest advantage of a link drive press is the ram's ability to slow down and punch through or form the material at a lower velocity than would occur in a conventional mechanical press operating at the same number of strokes per minute. This results in quieter operation. It also means there is less snap-through, which increases tooling life.