Abstract: The present invention relates to a machine tool for machining surfaces of in particular rotationally symmetrical workpieces (7), comprising at least one machining station (1, 2), at least one loading station (3) and/or unloading station (4) for the workpieces to be machined and/or the machined workpieces, a loading device (6) for transferring the workpieces (7) from one station (1, 2, 3, 4) to an adjacent station (1, 2, 3, 4), characterized in that the loading device (6) comprises a rotatably driven sliding device (8), a drive (9) for the sliding device (8) and a rotatably mounted and braked guiding device (10), wherein driving the sliding device (8) initially causes a workpiece (7) to be pressed by the sliding device (8) against the guiding device (10), after which the workpiece (7) abutting against the sliding device (8) and abutting against the braked guiding device (10) indirectly moved by the sliding device (8) is transferred onto a circular arc track from one station (1, 2, 3, 4) into an a

Abstract: A two-stage machining process is carried out using control of a pair of levers upon which one pair of grinding tools is provided. The second stage of the machining process is effected by grinding tools, e.g. immobilized segment of a grinding belt or band of tongs whose arms are inserted between the levers.

Abstract: An apparatus for grinding annular workpieces has a predetermined number of grinding stations including an upstream station and a downstream station, the stations are spaced a predetermined distance from one another along a straight path, a holder at each of the stations for gripping and rotating the workpieces, a tool at each of the stations for grinding the respective workpiece held by the respective holder, and an input device adjacent the upstream station for feeding workpieces sequentially to the apparatus and an output device adjacent the downstream station for receiving workpieces from the downstream station. An elongated transport bar has the predetermined number of laterally and generally upwardly open seats including an upstream seat and a downstream seat with the seats spaced longitudinally apart on the bar by the predetermined distance.

Abstract: An apparatus for grinding a disk having a center cup and a flat rim having a pair of opposite faces has a frame and an inner holder part rotatable relative to the frame about and displaceable on the frame along a holder axis and having a head formed with an outer holding face and with a central seat. An outer holder shaft rotatable relative to the frame and displaceable on the frame along the holder axis has an inner end turned toward the inner holder part and carrying a coupling in turn having an inner face and itself permitting biaxial movement between its inner face and the shaft. An outer holder part carried on the inner coupling face has a head formed with an inner holding face confronting the outer holding face and with a central projection engageable axially into the seat of the inner holder part. The inner and outer holder parts can be moved axially toward each other to clamp the center of the cup between the holding faces and to insert the outer-part projection into the inner-part seat.

Abstract: An apparatus for the fine grinding of rotating brake disks in the context of a flexible machining line. The grinding machine has a portal which forms a slide shiftable on a machine frame relative to a brake-disk holder having a fixed axis to allow adjustment for different diameters of hubs of lots of the brake disks which are ground on the machine. The brake disks are fed with vertical axes in succession to a fixed pickup location, are gripped by a manipulator and transferred to the holder where they are rotated about the horizontal axis of the latter to be ground by grinding wheels carried by the portal.

Abstract: A fine-grinding machine having a tool engageable with a workpiece is oscillated linearly at high speed has a drive comprising a tool-carrying slide having a connecting pin extending along an output axis, an input shaft centered on and normally rotating about an input axis offset from and generally parallel to the output axis, an eccentric carried on the shaft and having an outer surface eccentric to the input axis, and a link having an input end at the input axis and an output end at the output axis. A roller bearing supports the input link end on the outer surface of the eccentric. An elastomeric sleeve bearing snugly surrounds the connecting pin and snugly fits in the output end of the link.

Abstract: The grinding toolholders of a grinding machine for the fine grinding or honing of a camshaft or other workpiece are displaced along nonrotatable threaded spindles by high-precision rotatable nuts which are driven by a stepping motor on each holder via a cog belt coupling all of the nuts of each holder with the stepping motor. This ensures synchronous drive of the nuts and allows narrow holders to be used to grind closely spaced zones without the danger of canting of the holders.

Abstract: A fine grinding machine for crankshafts, camshafts and the like, has a fixed headstock housing in which the spindle carrying the workpiece chuck is rotatable and axially reciprocatable. The chucking action is effected by an axial displacement of the spindle by a setting mechanism which acts upon the spindle via the same member as that which transmits the axial reciprocation thereto for the oscillating drive. A flexible connection in the rotating drive permits the axial movement.

Abstract: A cylindrical workpiece has an end face ground on two synchronously driven supporting rollers, by a grinding tool mounted on a drive shaft in front of the supporting rollers, and a loading mechanism and an unloading mechanism. The loading mechanism and the unloading mechanism are a simply functioning loading and unloading unit which has a carriage mounted above the supporting rollers limitedly slidable back and forth on an upright frame portion and two bent workpiece carriers supported on the upright frame portion pivotable about horizontal pivot axes. Each of the two bent workpiece carriers is pivotally connected by a link member to the carriage and has a working arm which is provided with a holder and with a pressing roller enclosed in the holder with a predetermined clearance. The bent workpiece carriers are pivotable with the back and forth motion of the carriage so that the working arms alternatingly pivot between a grinding position and a loading and unloading position.

Abstract: The apparatus for grinding of the inner or the outer surface of an annular workpiece, especially a race ring for an antifriction bearing, includes a fixed holder for hydrodynamically centering the workpiece, a rotating driver, and a pressing device. A respective workpiece can be held by the holder and is pressed with one end face by the pressing device against the respective end face of the driver for coaxially rotating the workpiece and the driver. The pressing device includes a hydraulic cyliner/piston assembly, which can be pressed against the workpiece on the side which is opposite to the driver. The pressing device includes a pressing ring which is formed as an extension of the piston and which, via the respective workpiece, is rotatively driven by the driver. The pressing piston is arranged in a cylinder which is disposed coaxially with respect to the driver, but it is mounted fixedly in the machine so as not to rotate.

Abstract: A machine for finish-grinding of both axial and off-axial sections of a crankshaft, rotating about a main axis and oscillating therealong, comprises fixed first holders interleaved with movable second holders. The first holders support respective sets of primary tool carriers, three per set, equipped with abrasive stones that are equispaced about the main axis and act as intermediate bearings for the crankshaft. The second holders support similar sets of secondary tool carriers each with three abrasive stones defining a working axis. Each second holder, connected with the machine frame through an articulated linkage, is bracketed by two first holders and is guided by their flat surfaces with the aid of three sliders equispaced about the corresponding working axis; the sliders have recessed contact faces communicating with a source of hydraulic oil acting as a pressure fluid and as a lubricant.