Additional clamping devices are not required with the latest modules, so there are no interfering contours. The WDB basic modular system has a height from 80 mm and is graduated in 10 mm steps. WDS staple modules are available in five heights (30, 50, 80, 120 and 160 mm), which can be actuated with a hexagon key. The force and form-fit clamping connections lock the individual modules with pull-down forces of up to 25,000 N at an actuation torque of 50 Nm.
Schunk’s WDN direct clamping modules are available in three versions that connect the clamping pillars with the workpiece (via 6 bar pneumatic actuation) using a fixed Z-axis reference. The system can also be manually or pneumatically actuated with an integrated compensating function in the Z direction. This latter arrangement is used when deformation-free support of delicate workpieces is required.
For implementation on machine tables, the system includes basic module versions for T-slot plates, grid plates and Vero-S clamping stations. Standard fixed clamping pins without recess mount, cylindrical clamping pins and conical clamping pin extensions are available as a workpiece interface. Special clamping pins with floating pitch compensation in one or two axes (each ±1 mm) can be used for compensating workpiece tolerances or thermal expansion.
Each interface uses scope-free taper centring, which ensures a repeat accuracy of less than 0.005 mm, while feed chamfers at the module interface allow quick joining of the clamping pillars. The workpiece is clamped via spring force in a self-locking and form-fit fashion, without the need for compressed air. Parts remain safely clamped even in the event of a sudden pressure drop in the air system, says Schunk. In order to increase service life and process reliability, every functional component, such as base body or clamping slide, is made from hardened stainless steel.