Turning and machining coupling elements made of steel, grinding rolls made of carbide, milling gearbox covers made of aluminum, or gear grinding of hollow shafts made of stainless steel are just a few examples of the wide range of applications of the flat body flange spindle KFDF from RINGSPANN. They illustrate the versatility of this compact clamping tool, whose domain is particularly mechanical machining processes that place increased demands on precision. Aside from its run-out accuracy of ≤ 0.01 mm, it ensures exact centering and flat alignment of the clamped workpiece. 'The uneven deformation of workpieces - a common problem, for example, when using three-jaw chucks - can be excluded with our flat body flange spindle thanks to the complete 360° clamping,' says Christoph Schulz, product manager for clamping tools at RINGSPANN.
The KFDF belongs to the group of purely mechanically operated precision clamping spindles in RINGSPANN's portfolio and can be individually configured in all standard variants for clamping diameters from 120 mm to 375 mm in the company's one-stop shop (webshop). In addition, the German manufacturer offers standardized flat bodies that allow the clamping diameter to be expanded up to 560 mm.
Additional adaptations to various spindle connections, special workpieces, or customer specifications can be realized through customized mounts, contact rings, intermediate flanges, or spring storage. 'Within the geometry and tolerance specifications of the workpieces, we can fulfill almost every customer request here,' emphasizes Christoph Schulz.
Powerful elasticity
The KFDF from RINGSPANN is a system made up of six main components, whose functional powerhouse is a round steel disc that is slotted in a fan shape and pre-tensioned. The clamping diameter of the elastic flat body expands due to the applied axial actuation force, so that both a radial clamping force and an axial flat contact force act on the workpiece. In this process, the workpiece is centered and simultaneously aligned flat.
'The flat contact occurs against a contact surface on the outer surface or a custom-designed contact ring,' explains Christoph Schulz. The pressure pin is either connected to the clamping device of a machine tool or operated manually. RINGSPANN offers an assembly for manual clamping as an option.
Versatile, efficient, and safe
As with all clamping tools from RINGSPANN, the KFDF was developed with a focus on increasing flexibility and reducing setup times in chip-removing manufacturing. As a result, the company offers this compact flat body flange spindle as a modern precision clamping system that allows for highly efficient execution of many turning, drilling, grinding, and milling processes. Thanks to its high adaptability and ease of handling, it belongs to those clamping systems that can provide significant impulses in terms of process safety and productivity for the chip-removing machining of ring-shaped and cylindrical workpieces as well as housings with cylindrical bores.
Since it operates purely mechanically, it does not require pneumatic or hydraulic energy supply. It is also suitable for both wet and dry machining. 'And thanks to its high operational reliability and excellent run-out accuracy, it is another clamping technology solution for many automated processes, especially in balancing technology,' comments Christoph Schulz.
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