Metal Stamping Press Load Sensing and Control

Matt De Kam

Objective

Sense and control the load of a metal stamping press.

What factors contribute to loading? What methods can be used to sense the load? How can this information be integrated into the control

system?

The Press

60 ton capacity Unique Drive Train

Contributing Factors

Working metal properties Cutting clearance Tool sharpness Cutting shear Ram velocity

Load Sensing Methods

Strain Gauges Load Cells Piezoelectric

Transducers

Control System Options

Digital Readout Load Limit Switch SPC Tracking Variable Velocity Servo Press

Still Working on the Transfer Function

Simulations

Typical Load Signal

Simulations

Load limit switch

Simulations

Variable velocity servo press

Simulations

Variable velocity servo press

Questions?