Servo-electrically driven machine functions have a long tradition in Hatebur systems. The foundation for widespread use of this technology was laid more than 20 years ago with the introduction of the servo-electric material infeed in the HOTmatic HM 75 XL. Until then, all the functions necessary for the forming process were coupled and synchronized by means of a mechanical drivetrain.
By contrast, servo-electric drive functions are synchronized with the press movement in milliseconds via a machine control system and follow it with great precision. The selected setting values and movement profiles are specified by the control system for each press stroke and implemented by the drives with excellent repeat accuracy. This opens up completely new opportunities for a quick and easy response to changing process requirements. Key process parameters can be conveniently adjusted using the control panel on the control desk, even when the system is manufacturing.
Technology proven millions of times over
Nowadays, Hatebur machines are fitted with servo-electric material infeed systems almost without exception. The process reliability brought about by the 100% reproducible setting values, flexibility in production, and ease of operation and maintenance are now indispensable. But Hatebur would not be Hatebur if we didn’t keep working to make our products even more efficient and flexible to use.
The introduction of the Hatebur COLDmatic CM 725 was the first time the enormous potential of the servo-electric drive was consistently used for a transfer system, the core of every high-speed forming machine. Since its market launch, this system has successfully demonstrated its reliability over many millions of formed parts. This technology can be used to retrofit new functions and further developments as required, even after a machine has been delivered.
Building on the positive experiences from the production use of the CM 725, the time is ripe for the next step in the use of this technology. With the development of a servo-electrically driven transfer system for the HM 75 XL, a completely new chapter has been opened in the efficient implementation of challenging forming processes on this high-performance hot former.
New pressed part geometries
In the servo transfer unit module, the function of the workpiece transfer is split into three basic movements: Gripping the workpiece, transporting to the next forming station, and lifting the gripper for the idle return over the punch tools. Each of these movements has a linear trajectory and is driven independently by its own servo motor. These individual linear movements are cleverly superimposed to provide flexible overall movement sequences that go beyond the kinematic limits of conventional transfer systems. The increased flexibility opens up new possibilities for targeted optimization of existing processes while simultaneously setting the course for the expansion of the pressed part geometries that can be produced on an HM 75 XL. In particular for large flange parts or extruded parts (HFE), where simultaneous gripping of the flange and shank parts is necessary for process-reliable transfer, new solutions can be developed through optimized movement profiles. Because all the movements are provided directly from the compact servo transfer unit, complex mechanical drive units are eliminated and maintenance costs are significantly reduced. During production, the module is clamped in the machine and can be swiveled up in a continuously variable manner for adjustment and changeover processes.
Digital customer orientation
With the introduction of the servo transfer unit module, Hatebur is consciously taking another step towards an even more digital future, in which more and more position and force data from process-relevant functions is combined to form a broad overall picture and offer completely new insights through clever use. This fast-growing base of networked information on current operating conditions and important process parameters is becoming increasingly important for the successful use of production resources. Hatebur is actively working towards the future by developing customer-oriented solutions and services and will gradually make these available online to interested customers.
- Optimization of existing processes and tool setups
- Flexibility to expand the range of formed parts
- Fast retooling using recipe data from the machine control system
- One gripper type for the whole range of parts
- All gripper shoes grip the workpiece at the same time
- Fast correction of setting values using the graphic operator guidance
- Transport monitoring via motor data
- Gripping force adjustment using the graphic operator guidance
- Low maintenance costs due to simple construction
- Upgradeability for existing machines
- Function extensions can be retrofitted as required
- Easy maintenance due to consistent use of standard components
- Fast fault location due to remote access to drive operating data
- Position can be adjusted before the forming stations by referencing the servo drives
- Fast troubleshooting due to easy replacement of components
- Fast replacement of a complete module by means of defined interfaces
- Wear detection by means of comparing actual/target data of the drives
- Use of motor data for qualitative conclusions about the parts transport