Abstract: In a method for operating a machine tool, a machine-specific flow resistance and a respective tool-specific flow resistance are ascertained for various tools. Tool-specific regulator parameters for regulating a pump of a coolant lubricant device are computed on the basis of the machine-specific flow resistance and the tool-specific flow resistance of the tool chucked in a tool spindle. Subsequently, the machine tool is operated using the tool-specific regulator parameters. In this way, a rapid and exact feed of coolant lubricant to the machining point of the respective chucked tool is enabled in a simple and flexible manner.

Abstract: A holding apparatus/workpiece adapter apparatus arrangement includes a holding apparatus and a workpiece adapter apparatus. The workpiece adapter apparatus is positioned and fixed, with a workpiece fastened thereto, by the holding apparatus. The holding apparatus has partially cylindrical positioning elements, which engage in an associated cylindrical positioning recess and a positioning slot and position the workpiece adapter apparatus in an x and a y direction. The workpiece adapter apparatus bears by mating contact surfaces against contact surfaces of the holding apparatus and is clamped by linearly displaceable clamping elements and pressed against the contact surfaces, and thus positioned in a z direction. For clamping, clamping surfaces of the clamping elements bear against mating clamping surfaces of the workpiece adapter apparatus.

Abstract: A method for roughening a cylinder bore wall to be coated of a component, at least one groove, running around the central longitudinal axis, and at least one associated groove web, are generated such that the at least one groove web, in a radial direction directed toward the central longitudinal axis, forms first undercuts for a coating which is to be applied. Axial grooves running in the cylinder bore wall transversely to the at least one groove are generated such that the at least one groove web, in a peripheral direction about the central longitudinal axis, forms respective second undercuts for the coating which is to be applied. An adhesion of the coating which is to be applied, in the peripheral direction, is improved, so that stress cracks or detachments owing to a different thermal expansion of the component and of the coating which is to be applied are avoided.

Abstract: In the internal milling machine according to the invention for milling a work piece that rotates during machining with an annular internal milling cutter (5) on the one hand side the Z slide (4a, b) of each tool support (3a, b) includes a pass through opening and on the other hand side the transversal slide (7) supporting the internal milling cutter (5) is move able in the X-direction, the running direction of the mounting surface (1a) of the bed (1) wherein the mounting surface slopes downward in a forward direction. Based on this general configuration and in particular the arrangement of the Z-slides (6a, b) for the at least one tool support (3a, b) outside of the Z-supports (16a, b) for the opposite spindle stock (2?) yields advantageous centers of gravity in particular of the move able components and a high level of stability of the machine and therefore high level of machining precision of the machine.

Abstract: A workpiece clamping apparatus for a machine tool is proposed, including at least one receptacle for a workpiece, wherein the at least one receptacle includes a wall and an opening via which the workpiece is insertable into the receptacle in a linear direction and removable therefrom in a counter-direction, a clamping device for fixing the workpiece at the at least one receptacle, a first access area via which a first tool engages the workpiece for a first working operation, a counter-bearing for the first tool, and a second access area via which a second tool engages the workpiece for a second working operation, wherein the first working operation and the second working operation are performed at different locations on the workpiece using different tools and wherein the workpiece clamping apparatus is free of a counter-bearing for the second tool.

Abstract: For friction reduction in sliding bearing, it is known to structure the sliding surface (1) by ECM by introducing a plurality of microscopic small indentations (27). According to the invention it is proposed in particular in the same process step to smoothen also the intermediary spaces (6) between the indentations (27), thus to remove the tips of the surface profile.

Abstract: A method is proposed for controlling tool change operations on a machine tool, wherein a machining procedure on a workpiece includes a sequence of machining operations having in each case a particular tool and in each case a particular duration, and for a tool change, tools of a tool spindle are provided by a second storage device in communication with a first storage device, and wherein there is associated with the machining procedure a sequence of tool provision operations in which a tool provision operation has in each case a particular duration, wherein the method includes a determination stage wherein the durations of the machining operations and the tool provision operations are determined, and a control stage wherein the tool provision operations are temporally grouped in relation to the machining operations such that the tool provision operations bring about a minimized idle time in the machining procedure.

Abstract: In order to reduce friction of a crank shaft during operation by a large amount with low complexity through structuring sliding bearing surfaces (1) of the crank shaft through controlled introduction of microscopically small indentations (27) it is proposed for the center bearings and the crank bearings to only structure highly loaded portions of the bearing surface in circumferential direction and also in axial direction since this is already difficult to achieve in view of the operating gap towards the tool that only has a size of a few ?m.

Abstract: To produce toothed sections on workpieces, a machine tool has a machine bed, a pivoting element with at least two workpiece spindles arranged thereon and a tool positioning unit with a tool head. The spindles can be pivoted relative to the machine bed about a workpiece spindle pivot axis and each spindle has a workpiece receiver that can be rotatably driven about a rotational axis. The tool head can be linearly moved in three directions relative to the spindles, and can be pivoted about a tool head pivot axis. A bearing element extending in the direction of the workpiece spindle pivot axis, has a free end which is pivotable about the workpiece spindle pivot axis, and is rigidly arranged on the pivoting element. A reinforcing element is fastened to the machine bed. The pivoting element is reinforced about the workpiece spindle pivot axis by the reinforcing element.

Abstract: A machine tool including a tool spindle, to which a tool can be detachably fixed and by means of which the tool can be rotated, and a workpiece support is provided, the tool spindle and the workpiece support being displaceable relative to one another, characterized in that the tool spindle includes a loading device, which acts on a linearly movable rod of a tool fixed to the tool spindle. The tool spindle includes a motor device coupled to the loading device, which drives linear displacement of the rod. The machine tool includes a set of tools by means of which different machining operations can be conducted on a workpiece, wherein the tools can each be fixed to the tool spindle and the tools each have a rod on which the loading device of the tool spindle acts when a tool is fixed to the tool spindle.

Abstract: In a method for producing toothed sections on workpieces, a toothed section is firstly produced by means of a first tool in the region of a first end face of a workpiece to be toothed. The produced toothed section is reworked on the peripheral face by means of at least one second tool in the region of the first end face, while the toothed section is further produced. If the toothed section is also produced in the region of the second end face by means of the first tool, the reworking in the region of the first end face is already completed, so the toothed section can also be reworked in the region of the second end face. Short cycle times are thereby achieved with a low machine-related outlay.

Abstract: A spindle/tool combination for a machine tool is provided, including a tool, a spindle, on which the tool can be releasably fixed and by means of which the tool can be rotated, wherein the tool has at least one linearly movable rod and the spindle comprises a loading device, which acts on the at least one linearly movable rod of the tool, and a pull/push coupling device, by means of which the at least one rod of the tool can be coupled to the loading device, the at least one rod being actuable by means of the loading device by pushing and pulling when coupled, wherein the pull/push coupling device comprises a clamping jaw and the clamping jaw is arranged in the tool.

Abstract: In order to reduce friction of a crank shaft during operation by a large amount with low complexity through structuring sliding bearing surfaces (1) of the crank shaft through controlled introduction of microscopically small indentations (27) it is proposed for the center bearings and the crank bearings to only structure highly loaded portions of the bearing surface in circumferential direction and also in axial direction since this is already difficult to achieve in view of the operating gap towards the tool that only has a size of a few ?m.

Abstract: To produce toothed sections on workpieces, a machine tool has a machine bed, a pivoting element with at least two workpiece spindles arranged thereon and a tool positioning unit with a tool head. The spindles can be pivoted relative to the machine bed about a workpiece spindle pivot axis and each spindle has a workpiece receiver that can be rotatably driven about a rotational axis. The tool head can be linearly moved in three directions relative to the spindles, and can be pivoted about a tool head pivot axis. A bearing element extending in the direction of the workpiece spindle pivot axis, has a free end which is pivotable about the workpiece spindle pivot axis, and is rigidly arranged on the pivoting element. The reinforcing element is fastened to the machine bed. The pivoting element is reinforced about the workpiece spindle pivot axis by the reinforcing element.

Abstract: A machine tool is provided, comprising a machine frame, at least one carrier device for a tool or a workpiece by means of which a tool acting on a workpiece or a workpiece being acted upon by a tool is held during the machining of a workpiece, and a holding device holding the at least one carrier device in a non-movable or movable manner relative to the machine frame, wherein a bearing device is provided by means of which the at least one carrier device is mounted in a floating manner on the holding device with displaceability in a direction of displacement along a displacement path, and wherein an adjusting device is provided by means of which the position of the at least one carrier device along the displacement path can be adjusted and fixed.

Abstract: In order to shorten a process chain during material removing machining of a crank shaft, after rough machining and after hardening according to the invention a combination of single point turning with subsequent tangential turning and/or finishing and/or fine dry grinding and/or electrochemical etching is proposed as a second step.

Abstract: In order to save the investment for a separate cold rolling machine for applying threads etc. a cold rolling unit is placed in a moveable manner onto the Z-drives of a turning machine wherein the cold rolling unit can be configured much larger and much more stable and with less wear than a cold rolling unit used in a tool revolver. Even parallel processing through turning and rolling is facilitated.

Abstract: There is provided a machine tool which includes a machine frame, at least one tool spindle which is arranged on the machine frame and is displaceable relative thereto, a workpiece holder and a storage device for tools which is arranged on the machine frame, wherein a chain-type storage device communicates with the storage device and the at least one tool spindle.

Abstract: There is provided a machine tool including a machine frame, at least one tool spindle which is arranged on the machine frame and is displaceable relative thereto, a workpiece holder and a storage device for tools which is arranged on the machine frame, wherein at least one rotatable disk-type storage unit for tools is arranged on the machine frame and communicates with the storage device and with the at least one tool spindle, wherein a separate disk-type storage unit is associated with each tool spindle and wherein the storage device includes a circulating conveyor.

Abstract: A machining installation for workpieces comprises a workpiece positioning device comprising a workpiece holder pivot unit as well as a tool positioning device comprising a tool holder pivot unit. The workpiece holder pivot unit is designed such that a workpiece holder is pivotable about at least three and no more than four workpiece holder pivot axes. Moreover, the tool holder pivot unit is designed such that a tool holder is pivotable about no more than two tool holder pivot axes. The machining installation has a simple design and ensures flexible and accurate machining of workpieces.