Over the past 20 years, HATEBUR has continued to implement state-of-the-art servo technology into its COLDmatic cold forming machines. This includes its servo-electric direct drive technology, which it recently implemented on its CM625 and CM725 multi-stage horizontal presses.

The implementation comes after the successful introduction of servo drives for workpiece transport and material feeding, which now means that all three units have been converted to electric drive technology, giving users many benefits.

The servo-electric linear power supply shows consistency and speed, as well as easy maintenance and change. The same applies to the servo transfer unit, which, according to HATEBUR AG, is distinguished by its ease of use, flexibility, minimized changeover times and optimized process reliability.

Another important advantage of servo technology is its flexibility. Infeed, part transport and direct drive can all be independently programmed and controlled. For example, the direct drive can be slowed down to rear dead center, allowing more time for lateral workpiece transport. As a result, blanks with a length of up to 155 mm can be transported, which is almost 20% larger than before. In addition, the individual control of the press ram allows for unique motion control.

Another highlight is the steering wheel, which gives a better feeling for the machine; shortens installation times; and allows intuitive operation of the machine. Tool life has also been extended, ergonomics and workspace layout improved. One of the main advantages of servo direct drive is that high maintenance mechanical units such as drive belts, flywheels and brake-clutch combinations are no longer required and the components of the direct drive are virtually maintenance free.

With the HATEBUR CM725, up to 180 workpieces with a diameter of up to 32 mm can be produced with a maximum pressing force of 2,500 kN per minute. It is ideal for the manufacture of complex cold-formed parts for the automotive industry.