Abstract: The induction coil (13) of an arrangement which heats a tool-holder (1) inductively for the purpose of changing a tool shank (11) retained with a press-fit therein has a winding (19), in the case of which the number of coil turns per unit of length in the direction of the coil axis and/or the number of coil turns per unit of surface area is smaller in an intermediate region located, in the direction of the coil axis, between two main winding regions (21, 23) than in the two main winding regions (21, 23) and/or the internal winding diameter is smaller in the two main winding regions (21, 23) than in the intermediate region and/or, at least in an axial sub-region of the induction coil (13), increases from the two main winding regions (21, 23) in the direction of the intermediate region.

Abstract: An apparatus for inductively heating a sleeve section (16), having a central holding opening (18) for a shank (20) of a rotary tool (22), of a tool holder (10) that holds the tool shank in the holding opening in a press fit and releases it upon heating, comprises an induction coil arrangement with at least one induction coil (24), a generator (26) that feeds the induction coil arrangement with electric current of periodically varying amplitude, and a yoke arrangement (32, 34), of magnetizable material, which concentrates the magnetic flux of the induction coil arrangement onto the sleeve section in a fashion distributed all around. According to the invention, for the purpose of heating the sleeve section, the induction coil is arranged with reference to an axis of rotation (12) of the tool holder in a fashion offset eccentrically from the sleeve section and without wrapping around said section, in particular substantially radially next to the latter.

Abstract: A clamping device for clamping a machine element (3), in particular a tool holder for a drilling, milling or grinding tool or the like, which rotates about an axis of rotation (9), comprises a base body unit (11) which has a receiving opening (21) which is central with respect to the axis of rotation (9) and into which a coupling shank (5) of the machine element (3) can be fitted axially from one end, a chuck (23) which is arranged in the receiving opening (21), and a chuck-actuating unit (25), which is guided on the base body unit (11) in such a manner that it can be displaced in the axial direction relative to the latter, for actuating the chuck (23).

Abstract: The adjustable-length tool holder for a rotating tool comprises a base element (7) which is provided with a coupling shank (9) for connecting to a machine tool and which, axially remote from the coupling shank (9), ends in a sleeve part (11) forming a central locating opening (13). The tool holder also comprises a plurality of tubular-cylindrical extension sleeves (15, 19) which in turn each form a central locating opening (17, 21) and of which a first extension sleeve (15) is arranged in an interference fit in the locating opening (13) of the sleeve part (11) in such a way that it can be positioned in an axially variable manner, and each of the further extension sleeves (19) is arranged in an interference fit in the locating opening (17) of the adjacent extension sleeve (15) toward the base element (7) in such a way that it can be positioned in an axially variable manner.

Abstract: A shrinking arrangement for a tool holder (12) which retains a rotary tool (10) with a press fit in a central accommodating opening (20) comprises an accommodating unit (24) for accommodating the tool holder and a temperature-controlling arrangement (46, 64) at least for the thermal expansion, in particular also for subsequent cooling, of the tool holder in the region of the accommodating opening. According to the invention, the accommodating unit is arranged on a carriage (32) which is guided such that it can be displaced in the longitudinal direction of the rails of a rail system (30), which runs parallel to the axis (16) of the tool holder accommodated in the accommodating unit and is fastened on a supporting base (28), and it being possible for said carriage to be moved along its displacement path into at least one region of action of the temperature-controlling arrangement.

Abstract: The present invention pertains to the problem of compressing biomass, e.g., ripe grain or cereals, into solid pressed bodies 1, which are suitable for use as fuel, despite differences in the harvesting conditions, and whose strength no longer depends on the moisture content in the biomass. It was found that this problem can be solved without an essential expense by imparting a wavy structure 6 to the pressed body 1. As a result, the outer surface of the pressed body 1 is compressed more strongly by the extrusion than is the middle cross section area, in which long-fibered parts of the mass are readily oriented in a wave shape 21 and lead to elasticity of the pressed bodies 1, which is favorable for handling.

Abstract: The present invention pertains to the problem of chopping, drying and compressing into pellets--which shall be used especially as a fuel--freshly harvested biomass, especially cereal plants, in one operation. The chopped stalk material is moved forward for this purpose according to the present invention over a broad surface in a thin layer (32) in the manner of an accordion, while a warm air flow passes through it, before the stalk material is fed into the intake wedge of a pelletizing device (15). Screw conveyor groups (11, 12, 13) arranged at different levels are preferably used as the conveying means, and their direction of conveyance (23) is at right angles to the direction of travel (24) of the harvester (1), whereas the gaseous heating medium flows through the layers (32) being conveyed vertically (29) from bottom to top.

Abstract: A pressing or pelletizing device for compacting vegetable materials, in particular grass blades, is disclosed for use with a harvester. In order to reduce the pressing forces required for the pelletizing process, the pressing channels are heated up to a temperature above 100 degrees C. It has been demonstrated that by heating the pressing channels, local overheating of the device, which could otherwise lead to malfunctions, can be avoided. The pelletizing device has two co-axial hollow cylinders in which the pressing channels are delimited by radial lands which alternatively engage the pressing channels of the other hollow cylinder. The hollow cylinders are heated by means of a liquid circuit guided through the lands and linked to a heat exchanger that utilizes lost heat from the internal combustion engine of the harvester.

Abstract: The multi-coordinate sensing gauge of the invention comprises a sensing arm 7 displaceable relative to a housing 3 in the direction of a main coordinate axis 5 and guided on the housing 3 to be omnidirectionally pivotable about a first pivot point 19 located on the said main coordinate axis 5 by means of a first universal joint 13. A linkage arm 23 is coaxially connected to the sensing arm 7 and the end of said linkage arm which is away from the first universal joint 13 is omnidirectionally pivotable by a second universal joint 25 about a second pivot point 27 and is connected to a drive element 29. The drive element 29 in turn is guided on the housing 3 so as to be omnidirectionally pivotable about a third pivot point 33 by a third universal joint 31 displaceable along the main coordinate axis 5.

Abstract: Equipment for briqueting plant stalk-produce, includes a conical-screw compactor, a tubular press-cavity, an annular degassing device and a control device including a molding pressure sensor. The annular degassing device adjoins a discharge aperture of a compactor space with a plurality of narrow-axial degassing slits open to the atmosphere, which issue into the discharge aperture of the compactor space.