Ernst Thielenhaus Gmbh & Co. Kg

Thielenhaus Technologies Gmbh

Harald Goldau

Peter Brust

Martin Wolters

Marc Stephan Klopp

A device for processing the finish of work pieces. The device has a feed unit with a slide and an NC-controlled drive, a motorized spindle unit with a motor-driven tool spindle, and a force measurement device. The force measurement device is for measuring the contact pressure that is brought to bear upon the tool spindle in the course of processing a work piece. According to the invention, the motorized spindle unit is seated on the slide with resilient elements that accept the weight of the motorized spindle unit and are movable only in the direction of processing. The slide is supported on leaf springs, which are oriented perpendicular to the direction of advance of the slide. The force measurement device is arranged on the motorized spindle unit and on the slide between the connective elements.

Device for processing the finish of work pieces

A method for the finishing treatment of work pieces, uses a processing device including a tool spindle for a processing tool and a numerically controlled (NC) feeding device. The force of the contact pressure applied to the work piece on the side of the work piece is measured and the measured force values are supplied to the numerical control (NC), which determines and fixes the feed rate at which the processing tool is advanced against the work piece. The finishing treatment is carried out in a force-controlled operating mode, in which the feed rate is controlled depending on the force of the contact pressure acting on the processing tool. A processing device is employed whose tool spindle is movably supported in the direction of the feeding movement on leaf springs on the feeding device. The processing device includes a force-measuring device effective between the tool spindle and the feeding device and operating substantially free of deformation. In the force-controlled operating mode, feed rate values are allocated to the values measured by the force-measuring device at a cycle control frequency preset by the numerical control (NC), whereby the allocation is fixed according to a damping function.

Method for the finishing treatment of workpieces

A method for finishing a valve seat for ball valves, in particular for fuel injection valves in internal combustion engines. The workpiece to be finished and a finishing tool are driven in an opposite direction of rotation, whereby the axes of rotation of the workpiece and the finishing tool are aligned with each other at an angle of from 1&deg; to 10&deg;. The finishing tool rests against the inside surface of the workpiece to be finished over its entire circumference. The surface of the workpiece to be treated is provided with a crowned shape. A finishing stone with a wear-resistant and preferably cone-shaped working surface is employed as the finishing tool, whereby a narrow sealing zone with a convex contour in the longitudinal section is produced in the crowned surface of the workpiece by partial removal of material.

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Klein-Gübs, Germany

Harald Goldau