Screw press is the most widely used die forging equipment in China. It has experienced the development of the first generation friction press, the second generation of high-energy screw press and electric screw pressure. With the higher requirements of users on equipment performance and reliability, servo motor and control technology progress, so-called the third generation of servo direct drive screw press has become the latest development of forming equipment.

The third generation screw press, servo direct drive screw press, adopts permanent magnet synchronous servo direct drive motor to drive screw directly. The rotary motion of screw is converted into reciprocating linear motion of nut and slider. The traditional gear or belt transmission link is cancelled, with its zero transmission characteristics from motor to flywheel energy storage, the transmission efficiency is improved, the original transmission link fault factors of screw press are eliminated, and the failure rate and maintenance rate are reduced to the maximum extent. The forming equipment has the characteristics of flexibility and intelligence, ensures the reliability and stability of the equipment, and has epoch-making significance.

It has the following outstanding advantages:

· Zero drive: Adopts advanced AC permanent magnet synchronous servo direct drive motor and vector control technology to directly transfer torque to the screw, without intermediate transmission parts, vulnerable parts and energy loss.

· High efficiency: Transmission efficiency increased by more than 20%, more energy saving.

· High reliability:  Eliminates the traditional motor and gear or belt drive system, avoids the weakness of low service life of traditional motor and gear, and improves the reliability of equipment.

· High precision:  Servo motor and drive system are used to make energy control more accurate. Equipment capability index (CMK) is greater than 1.67 (international standard 1.67).

· Low noise: Motion noise is greatly reduced.