Abstract: A workpiece has a tribologically useable surface formed as a sliding surface, lubricated by an intermediate material, for a counterpart movable relative to the workpiece in a direction of movement. The sliding surface is provided with a structure formed of a plurality of pockets. The pockets form a closed micropressure chamber delimited by the uninterrupted peripheral rim, respectively. The uninterrupted peripheral rim is a deburred structure edge. In a plan view, the pockets are elongate and have a longitudinal extension. The sliding surface has a functional roughness in the supporting areas between the pockets.

Abstract: A combination tool for machining a bore has a tool shaft transmitting a rotational movement and an oscillating movement in an axial direction of a bore to be machined with the tool. A horning tool is arranged on the tool shaft, and a deburring tool is arranged on the tool shaft at an axial spacing to the honing tool in a direction of a longitudinal axis of the tool shaft. The honing tool is configured to move for each honing stroke between a lower position and an upper position wherein a spacing between a lower edge of the honing tool and a lower edge of the deburring tool in the direction of the longitudinal axis of the tool is greater than a spacing of the lower edge of the honing tool to a workpiece surface when the honing tool is in the lower position.

Abstract: In a method for machining bores of workpieces with a desired nominal shape of the bores in operative condition, a bore with a desired nominal shape in inoperative condition is produced in a workpiece and the workpiece is then put in operative condition. A deviation of the desired nominal shape of the bore resulting from the operative conditions is determined. Based on the deviation, an initial shape which shape the bore must have in inoperative condition in order for the bore to assume the desired nominal shape in operative condition is the determined. Bores are then produced by employing the determined initial shape as a template.

Abstract: In a method for machining bores of workpieces with a desired nominal shape of the bores in operative condition, a bore with a desired nominal shape in inoperative condition is produced in a workpiece and the workpiece is then put in operative condition. A deviation of the desired nominal shape of the bore resulting from the operative conditions is determined. Based on the deviation, an initial shape which shape the bore must have in inoperative condition in order for the bore to assume the desired nominal shape in operative condition is the determined. Bores are then produced by employing the determined initial shape as a template.

Abstract: A workpiece has a tribologically useable surface formed as a sliding surface, lubricated by an intermediate material, for a counterpart movable relative to the workpiece in a direction of movement. The sliding surface is provided with a structure formed of a plurality of pockets. The pockets form a closed micropressure chamber delimited by the uninterrupted peripheral rim, respectively. The uninterrupted peripheral rim is a deburred structure edge. In a plan view, the pockets are elongate and have a longitudinal extension. The sliding surface has a functional roughness in the supporting areas between the pockets.

Abstract: A device for grinding an end face at an edge of a workpiece bore of a workpiece has a driven grinding tool and a guide pin, connected to the grinding tool, for insertion into the workpiece. The guide pin is dimensioned so as to precisely match the workpiece bore. The guide pin has a central axis. The grinding tool has a grinding surface extending angularly to the central axis. The grinding tool is periodically displaceable transverse to the central axis.

Abstract: The method of fine-machining a workpiece surface to be supplied with a lubricant during operation of the workpiece includes the steps of subjecting the workpiece surface to a stream of a medium to produce linearly extending channels of a predetermined first depth in the workpiece surface, the linearly extending channels defining areas therebetween, and forming in the areas by subjecting the workpiece surface to a stream of a medium grooves of a second depth smaller than the predetermined first depth. The linearly extending channels may be arranged in a crossed arrangement. Preferably, the method is carried out as a two-step process. Expediently the method further includes the step of employing a laser for at least one of the steps. The laser can form the channels with dimple shaped depressions positioned in a row.

Abstract: A method for finishing surfaces of workpieces includes a honing process with at least two method steps. In one of the method steps the surface, for example, the inner wall of a bore, is honed to a predetermined final dimension whereby a very fine structure with minimal depth of honing traces is generated so that a great portion of the surface functions as the supporting surface. In a further method step, which can be performed before or after the finishing-honing step, crossed grooves are provided in the surface by subjecting the surface to a stream of a medium, especially a laser, whereby the pattern of the grooves provides a lubricant reservoir for the future use of the workpiece. The treatment with a stream of a medium does not cause deformations at the edges of the grooves. This ensures an optimal distribution of the lubricant.

Abstract: Pressure with which working parts of the honing tool are pressed against the bore wall is controlled during machining. The pressure per unit area of the working parts can thereby be kept constant or specifically varied, irrespective of the surface configuration of the bore wall. For this purpose, the honing machine includes a feed mechanism and electronic control device for predetermining the pressure of the working parts against the bore.

Abstract: A honing tool is used for the surface machining of the cylinder working surfaces of cylinder bores of an internal combustion engine. In order to obtain a uniform plateau texture over the entire surface of the cylinder bore, working elements are provided which can be brought to bear under radial pressure against the bore wall. The working elements are designed as honing rings, which are mounted in the tool like piston rings. The honing rings are arranged roughly coaxially to the longitudinal axis of the honing tool.

Abstract: The grinding apparatus permits precision machining of a valve seat or a sealing surface, and includes a grinding spindle having a holding and guiding part extending into a finished workpiece bore with clearance. The holding and guiding part is smaller in diameter than the grinding spindle and includes a pin which carries on its free end a grinding tool. The other end of the pin passes into the grinding spindle which has a substantially larger diameter. The grinding spindle is located outside the bore of the workpiece and may thus be made very stable. The pin is held by the grinding spindle so that the workpiece is held and guided securely even in the case of very small workpiece diameters.

Abstract: An electrical device for controlling the stroke length of a reciprocating tool carrier of a honing machine by controlling the stroke reversal points of the carrier includes a first compensating circuit for correcting deviations from a predetermined lower reversal point and a second compensating circuit for correcting deviations from a predetermined upper reversal point, the compensating circuits supplying respective reversal point signals to a comparator for comparison with a voltage representing the instantaneous position of the carrier along a stroke path.

Abstract: To insure that cylindrical bores, and particularly blind bores (8) in a workpiece (9) are truly cylindrical, or of predetermined geometry even in the region adjacent the bottom of the blind bores, a honing blade carrier (4) has a set of long honing blades (5, 5a) of about the length of the bore and a set of short honing blades (6, 6a) located adjacent the bottom of the bore on the tool, with the short honing blades being independently adjustable; sensing elements (25, 26, 27) are integrated with the tool carrier (4) to sense the dimension of the bore at various levels or planes (A, B, C), the output signal from the plane (C) of the bottom of the bore being processed in a controlled channel (32) to adjust, individually, the honing pressure exerted by the short blades, in relation to tool feed, and hone the bottom of the bore to the appropriate size, as determined, for example, by a sample standard (28) having a sensing plane (D) which can be sensed by the same sensing elements as those which sense the bore, up