hydraulic, mechanical, electro-mechanical or hydro-mechanical actuation
Automatic centring, coupling and clamping of grip rails on transfer presses The coupling is used whenever the maximum clamping force with high dynamic strength in the smallest space is required.
In contrast to conventional systems, the new coupling design is such that all components for positioning, centring, clamping force build-up and position monitoring are integrated into the active part of the coupling which is firmly connected to the press. The passive part of the grip rail coupling does not have any moving parts. In order to keep the weight of the coupling low, the housings of both the active and the passive parts are made from hard-coated, high-strength aluminium. When moving the two halves of the coupling into position (insertion of grip rail), these are pre-centred by guide elements. During clamping, positioning pins on the active part extend and locate in bore holes in the passive part. By means of this type of centring a high repeatability is obtained. The clamping force is built up using a tie rod and maintained in a self-locking manner. A compact position monitoring system installed in the element is easily adaptable to a bus system and this ensures exact positioning and clamping. As an option, rapid action couplings for energy, compressed air and hydraulic oil can be designed as per customer's specification.
Possibilities of positioning and changing
see figure 2
● hydraulic (figure 3)
● mechanical (figure 4)
● electro-mechanical (figure 5)
● hydro-mechanical (figure 6)
Function: hydraulic version
After applying hydraulic pressure, the coupling halves are centred, clamping force is built up and the tie rod is mechanically locked. Even in the event of a pressure drop the clamping force is fully maintained by mechanical self-locking. For safety reasons, we recommend that the hydraulic pressure is maintained.
coupling and clamping without energy
according ROEMHELD information WZ-001
In contrast to conventional systems, the new coupling design is such that all components for positioning, centring and clamping force buildup as well as for position monitoring are integrated into the active part of the coupling which is firmly connected to the press. The passive part of the grip rail coupling does not have any moving parts.
In order to keep the weight of the coupling low, the housings of the passive part is made from hard-coated, high-strength aluminium.
This grip rail coupling does not require hydraulic, electrical or pneumatic energy for coupling / uncoupling and clamping of a transfer bar and works absolutely without energy. The coupling uses the motion of the grip rail for coupling and uncoupling. Clamping is effected by positive locking and via spring force.
The grip rail coupling has a much more compact design and no additional energy is required for the rail change.
The acquisition costs are significantly reduced since no tubing and piping is required.
Coupling – active part
The active part of the grip rail coupling works without hydraulic or pneumatic energy.
Coupling – passive part
The passive counterpart has no moving parts and is thus absolutely maintenance-free.
3-axis transfer system with hydraulic grip rail coupling (transfer rail coupling)