Fritz Schunk Gmbh & Co Kg Fabrik Fur Spann-und Greifwerkzeuge

Schunk Gmbh & Co. Kg Fabrik Fur Spann - Und Greifwerkzeuge

Heinz-dieter Schunk Gmbh. & Co., Spanntecknik Kg

Fritz Schunk Gmbh Fabrik Fur Spann-und Greifwerkzeuge

Gerhard Michler

Thomas Retzbach

Ralf Winkler

Siegfried Gulde

A parallel gripper includes a housing and two adjustable gripper base jaws which are displacably guided in a jaw guiding recess. The base jaws are moved relative to one another by a wedge hook gearing that is adjusted by a piston guided in the housing. The jaw guiding recess is provided with complementary configured guiding grooves. The ratio of the wall thickness of the housing between the base of the guiding grooves and the outside of the housing to the width of the housing measured vertically in relation to the direction of displacement of the base jaws is at least 0.2. The ratio of the width of inclined traction of the wedge hook gearing to the outside width of the base jaws is at least 0.4.

Parallel gripper

The invention relates to a clamping cylinder for operating, for instance, a chuck by means of a pull pipe or pull rod installed preferably in a turning machine. The clamping cylinder has a cylinder casing (,) comprising a screwed-on cover plate (,), an axially displaceable piston (,) in the work chamber (,) of the cylinder casing (,) to produce the clamping force and a distributor (,) fixed onto one of the cylinder casing faces with ports and pressure lines for supplying and discharging a pressure oil to and from the work chamber of the piston. According to the invention, the cylinder casing (,), its lid (,) and the distributor casing are made of a light metal in order to reduce inertia moments and wear and to improve lubrication and heat dissipation. The walls of the locating bores for the piston (,) and/or its piston rods (,) are hard coated. The piston and its two piston rods are made in a single piece from a tool steel and their respective contact surfaces are hard chrome coated. In order to maintain an even sealing gap (,), radial bores (,) are provided in the piston rod (,) located in the distributor casing (,), one of said radial bores additionally supplying the sealing gap with oil.

Clamping cylinder

A chucking device for accurate mutual fixation of disk-shaped parts or rotationally symmetrical parts. The device has a chucking element that engages with members in a form-fitting manner and has an expansion sleeve that together with the chucking element forms the border of a pressure chamber filled with an incompressible medium. Due to a relative axial movement between the chucking element and the expansion sleeve, the medium enclosed in the pressure chamber is pressed against the wall of the expansion sleeve, which thus comes in pressure contact with the corresponding peripheral surfaces of the two members.

Chucking device for accurate mutual fixation of two members

A chucking tool for non-positive precision chucking of a part such as a workpiece or the shank of a tool, for example. The tool consists of a base body, an expansion sleeve that is detachably mounted on a part of the base body which is elastically deformable in the radial direction, and a device for introducing a hydraulic medium into a pressure space provided between the expansion sleeve and the wall of the base body. According to this invention, the expansion sleeve is made of a comparatively thick-walled thermoplastic material, at least in its radially deformable part. According to another feature of this invention, there is at least one groove-shaped hydraulic medium channel in the area of the surface pairing of the expansion sleeve and the base body and it can be acted upon by the supply of hydraulic medium, for example, with a manually operated piston-cylinder unit provided in the base body.

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Ilsfeld, Germany

Gerhard Michler