Automobile Press Parts plants have been the backbone of manufacturing throughout the 20th century and beyond. As the number of cars, household appliances, and other products grows to millions, stamping plants with large mechanical presses remain a symbol of the hustle and bustle of the manufacturing economy.
Now, especially where cars are involved, this economy is mainly focused on safety, strength, and improved fuel use, rather than steel castings and forgings, but requiring the use of high-strength aluminum parts. In response, press technology has been developed and combined with servo motors to increase punching flexibility and speed.
Mechanical presses are called "mechanical presses" because they use flywheels and other gear components to drive the plunger to provide maximum pressure at the bottom dead center (BDC). Large rams, large flywheels and gear units will provide huge tonnages, and body panels and other components can be formed from sheet metal by using molds and other tools.
Such presses have impressive strength but limited flexibility. As demand changes and becomes lighter and more complex parts are required (such as multiple bent stamped parts with different thicknesses, perforations, and other formed parts), stamping technology has changed.
Essentially, servo presses use servo motors with gear assemblies to provide complete pressure tonnage in different parts of the sliding motion. This allows additional punching operations, such as perforating, embossing, assembly and other in-mold operations, in less time in the same punching stroke, which greatly increases speed and flexibility.