Abstract: A displaceable carriage (10) and a linear guide for guiding the carriage, which includes a first guide path slideway (13, 31) and a second guide path slideway (32). To form the first slideway (13, 31), the carriage (10) includes at least one pocket (13), which slides along the first guide path part (31) and can hold lubricant under pressure to create a relieving force on the carriage (10). The second guide path part (32) includes an island-shaped surface to create a frictional force on the carriage (10). A pressure medium held in the at least one pocket (13, 14, 15) creates the relieving force, whereby the first slideway (13, 31) relieves the load on the second slideway (11a, 12a, 12b, 32).

Abstract: The present disclosure relates to a machine tool, such as a grinding machine, and to a method for measuring a workpiece in a machine tool. The machine tool may comprise a workpiece mount (14), a tool unit (28), a measuring device (48) and a control device (56) that is connectable to the measuring device (48) and the tool unit (28), wherein the measuring device (48) is received at the tool unit (28) and comprises at least one toggle measurement head (66; 68), wherein the at least one toggle measurement head (66; 68) is received at a support piece (80) that provides a plurality of defined predetermined locations for the at least one toggle measurement head (66; 68), and wherein the control device (56) is arranged to detect signals that are triggered by the at least one toggle measurement head (66; 68) when touching a workpiece (96), and to determine on the basis of an actual location of the tool unit (28) an actual position of the at least one toggle measurement head (66; 68).

Abstract: The present disclosure relates to a machine tool, in particular a grinding machine, and to a method for measuring a workpiece, in particular a workpiece diameter, in a machine tool, in particular a grinding machine, which comprises a workpiece mount, a tool unit, a measuring device and a control device which is connectable to the measuring device and the tool unit, wherein the measuring device is accommodated on the tool unit and comprises at least two measuring probes, wherein in a measuring configuration the at least two measuring probes are spaced apart by a basic spacing which defines a measurement region, wherein the basic spacing is selected to be greater than a known reference dimension, wherein the control device is configured for acquiring values detected by way of the at least two measuring probes, of detecting an actual position of the tool unit, and, on the basis of a displacement path of the tool unit when probing a workpiece which is moved into the measurement region, of determining an actual sp

Abstract: The present disclosure relates to a machine tool, in particular a grinding machine, and to a method for measuring a workpiece, in particular a workpiece diameter, in a machine tool, in particular a grinding machine, which comprises a workpiece mount, a tool unit, a measuring device and a control device which is connectable to the measuring device and the tool unit, wherein the measuring device is accommodated on the tool unit and comprises at least two measuring probes, wherein in a measuring configuration the at least two measuring probes are spaced apart by a basic spacing which defines a measurement region, wherein the basic spacing is selected to be greater than a known reference dimension, wherein the control device is configured for acquiring values detected by way of the at least two measuring probes, of detecting an actual position of the tool unit, and, on the basis of a displacement path of the tool unit when probing a workpiece which is moved into the measurement region, of determining an actual sp

Abstract: In the method for controlling a movable tool, in particular a grinding tool, by means of a feed function that specifies the movement of the tool in time in at least one axis, an initial feed function in the form of at least one initial feed curve (29) is displayed on a monitor. From the initial feed function and from inputs effected by means of a pointing device, a feed function is calculated and displayed as a modified initial feed curve on the monitor. Control commands for moving the tool are produced from the feed function. The input of the feed function is simplified and rendered more flexible.

Abstract: The invention relates to a machine tool for machining workpieces, comprising a workpiece holder. Said workpiece holder comprises a support, a workpiece spindle head mounted on a first side of the support, and a tailstock. Said tailstock is mounted on a second side of the support which is different from the first side in a manner so as to be displaceable.

Abstract: The positioning device includes at least one displaceable carriage, liquid slide bearings on which the carriage is displaceable, and a carriage drive. The latter includes a first linear motor including a first primary part and a first secondary part that is opposite thereto and located in a first plane, and a second linear motor including a second primary part and a second secondary part that is opposite thereto and located in a second plane. The two linear motors are arranged in inclined positions such that the two planes are different and form an intersecting angle.

Abstract: The tool unit for the ultrasonically assisted rotary machining of a workpiece comprises a converter (23) including at least one electroacoustic transducer (22) for generating and transmitting ultrasonic oscillations, a tool (30) that is coupled to the converter, and a holder (21) in which the converter including the transducer is arranged and which is insertable at least partially in the retainer (11) of a tool spindle (10) and connectable thereto by means of a detachable connection (27).

Abstract: The driving device for a circular grinding machine where the workpiece is driven between two stationary centers comprises a driven device allowing a removable attachment of a driver which is adapted to hold and turn the workpiece by means of elastic force. The driver comprises two adjacent, symmetrically disposed annular spring elements whose junction is provided with a through-going opening which forms two prismatic workpiece holders, as well as respective longitudinal openings disposed in the axis of the points of the prismatic workpiece holders which are provided with prismatic ends for receiving respective, correspondingly shaped bolts of the driven device of the circular grinding machine in order to spread apart the spring elements. A driver of this kind offers a reduced weight, on one hand, and a high precision, on the other hand, and it is particularly adapted for grinding small precision parts.

Abstract: In the case of a device for circular and/or profile grinding, it is provided that the grinding tool is constructed as a ring, which, on its interior circumference, is provided with an abrasive coating. In preferred embodiments the ring shaped grinding tool is a rotary part of an electric motor.

Abstract: In the case of a universal grinding machine, it is provided that a workpiece spindle head, a grinding spindle head and a footstock are each constructed as separate constructional units which, by means of fixing devices, are fixed to the base, these fixing devices permitting a detaching and a changing of the relative working position and a reattaching in the new working positions.

Abstract: A process is provided for the manufacturing of machine parts wherein a concrete polymer including a filler mixture formed of rock particles and a binding agent matrix is employed. It is provided that as the fine part of the filler mixture, particles are used that are made of mechanically resistant materials having a modulus of elasticity that is higher than the rock. It is also provided that essentially cubic broken rock particles are used and that the mixture of rock and fine particles and the binding agent system is condensed in a casting mold in such a way that as many of the adjacent particles as possible contact one another.

Abstract: A composition for molding and casting machine parts, comprising a filler of aggregate rock material or the like, a resin-based binder system, and between 2 to 15% by weight of the total composition of inorganic or organic fibers.

Abstract: In the case of surface plate and slideway portions made from natural rock or artificial rock as the base layer, a plastic-bound outer layer containing hard material portions and in which are also incorporated solid lubricant portions is applied to the base layer. This leads to workpieces with high abrasion resistance and good sliding characteristics.

Abstract: A loading arm apparatus having a displaceable main shaft formed as a fluid operable cylinder with a fixed piston which may be clamped at any position along its displacement by a fluid operable clamping means operable against its wall. A guide rod placed in a common block with the main shaft can be clamped also by a separate clamp simultaneously with the main shaft. As a result, the main shaft can be mounted with a large play.