Electric presses
Introduction
A forming press, commonly abbreviated press, is a machine tool that changes the shape of a part being worked by applying pressure.[1].
Depending on the die that is attached to the press, stamping, cutting and holes can be done simultaneously or not. This type of machine is widely used in the field of metallurgy and ceramics. Mechanical presses are used to form and cut various materials.
[1].
It is a machine that basically compresses (presses) a die&action=edit&redlink=1 "Die (tool) (not yet written)") against the material to be molded or cut by the movement of
total or partial rotation. It can be moved pneumatically, with an electric motor or mechanically through a rod.
The force generated by the presses varies along their path depending on the angle of application of the force. The closer to the point of impact, the greater the torque. As an accepted standard by manufacturers, presses have the force point at about 30 degrees on gear reduction presses and 20 degrees on direct drive presses.
Presses can be classified according to different criteria:
Simple press
It usually consists of a simple rectangular frame, often made from a "C" channel or tubing, containing a bottle jack or hydraulic cylinder to apply pressure via a ram to the part being worked. It is often used for general purpose formwork work in automotive mechanics shops, machine shops, garages or basements, etc. Typical shop presses are capable of applying between 1 and 30 tons of pressure, depending on size and construction. Lighter duty versions are often called "shaft presses."
A shop press is commonly used to press "interference fit" parts, such as gears into shafts or bearings into housings.
Example of peculiar press control: the servo-press
A servo press, also known as a servopress or electropress, is a press driven by an AC servomotor. The torque produced is converted into a linear force through a ball screw. Pressure and position are controlled through a load cell and encoder. The main advantage of a servo-press is its low energy consumption; It represents only 10-20% of other press machines.