Abstract: A machine magazine to receive a plurality of tools that can be moved in a first transport direction is associated with a machine tool. Also provided is a changing magazine to receive a plurality of tools that can be moved in a second transport direction, which tools are to be inserted into or removed from the machine magazine. A transfer apparatus for changing tools between the machine magazine and the changing magazine is also provided. In the machine tool, the first and the second transport directions are opposite to one another. A method for tool changing that is implemented on the machine tool is also described.

Abstract: A machine tool comprises a tool exchanger for exchanging tools between a vertical-axis spindle and a load/unload position of a tool magazine. The load/unload position is located, in a front view of the machine tool, above the spindle and laterally offset therefrom. The tool exchanger, further, comprises two exchanger arms operating reciprocally, each contributing to conveying a first tool from the spindle to the load/unload position and, simultaneously, a second tool from the load/unload position to the spindle. The exchanger arms are each rotatable about one separate axis only. Each of the exchanger arms exchanges its associated tool between the spindle and one separate transfer position each. The two transfer positions associated to the two exchanger arms are located at different distances in front of the load/unload position on the tool magazine. Further, a transfer device is provided for transferring the tools between the load/unload position and, alternately, one of the transfer positions.

Abstract: A machine tool comprises a travelling column, a spindle stock to be displaced on the travelling column, and a tool magazine. Toolholders are stored in the tool magazine and may be individually conveyed into a transfer position within the tool magazine. Two gripper arms serve to interchange the toolholders between the transfer position on the tool magazine and a working position in the spindle. The orientation of the toolholders during interchanging is maintained. The gripper arms are separately mounted on the spindle head and can be pivoted simultaneously and in opposite directions along locus curves. The gripper arms have grippers to hold the toolholders during the interchanging between the transfer position and the working position. The transfer position and the working position lie in a common vertical plane. The transfer position is located in the area of the travelling column front side facing toward the spindle stock.

Abstract: A machine tool (10) comprises a spindle head (11) and a workpiece table (12), in which a first region is provided as a machining side (14) for first workpieces (17) for machining by means of a tool, and in which a second region as a loading side (15) can be loaded with second workpieces (17'), preferably while the first workpieces (17) are being machined. The two regions (14, 15) can be exchanged by means of relative positional change between the spindle head (11) and the workpiece table (12) occurring in the direction of a first coordinate (18) of the workpiece table (12). A spray shielding panel (16), extending in the direction of a second coordinate (19) approximately perpendicular to the first coordinate (18), is provided between the regions (14, 15). The spray shielding panel (16) is configured at least in sections with a variable length in the direction of the second coordinate (19).

Abstract: A machine tool comprises a workpiece table that can rotate about a vertical axis. A first spray shielding panel is rigidly attached to the workpiece table substantially along one diameter thereof. It divides the workpiece table into a placement side and a machining side. A second spray shielding panel is stationary and is arranged above the first spray shielding panel, and runs substantially parallel thereto. An articulated third spray shielding panel connects the first and second spray shielding panel to one another. It is connected at its top in a hinged manner to the second spray shielding panel and is provided with a channel at its bottom that encloses an upper edge of the first spray shielding panel over a finite length.

Abstract: A tool changer for tools of a machine tool has a gripper on which two movable jaws are arranged for positive gripping of the tools and on which is mounted an actuation element which is axially displaceable in the longitudinal axis and swings the jaws around their respective pivot axis into a spread position for inserting and removing the tools and into a closed position for positive gripping of the tools. Between the actuation element and each of the two jaws there are provided one opening linkage and one closing linkage each. Each of the two opening linkages has an oblique surface provided on the actuation element that interacts with an opposing surface provided on the jaw for opening the respective jaw. Each of the two closing linkages has a guide bevel provided on the actuation element which interacts in each case by means of an associated rolling element with a contact surface provided on the jaw for closing the respective jaw. The two closing linkages positively lock the jaws in the closed position.

Abstract: A machine tool has a spindle rotating in a headstock and has, further, a gripper for transferring a toolholder from an uncoupled position into a ready-to-couple position within the spindle. A coupling mechanism is provided for further transferring the toolholder from the ready-to-couple position to a couple position within the spindle in which the toolholder can be rigidly connected to the spindle for rotation therewith. In order to control the transferring steps, a sensor is provided for detecting whether the toolholder is in its couple position.

Abstract: A machine tool is disclosed having an inverted spotfacer chucked in a rotatable tapered spindle socket. The inverted spotfacer comprises an actuation shaft being rigidly axially connected to a tapered shank which, in turn, is chucked in the socket. A shoulder element can be displaced on the actuation shaft against the force of a spring. Further, a positive control mechanism acts between the actuation shaft and the shoulder element. Due to the action of the positive control mechanism, when axially displacing the actuation shaft relative to the shoulder element, a cutting tool arranged tiltably at the lower end of the actuation shaft may be tilted between two operational positions. In the first operational position the cutting tool extends parallel to the longitudinal axis of the spotfacer, whereas in the second operational position the cutting tool extends perpendicularly to the spotfacer axis, the second operational position being the position in which the spotfacer may make countersunk bores on workpieces.

Abstract: A machine tool has a spindle rotating about a spindle axis and a quill that can be displaced relative to the spindle in the direction of the spindle axis. Arranged at intervals around the spindle are a number of gripper arms that are fastened to the quill, whereby each gripper arm carries a tool holder that has a cone. The cone of each tool holder can be individually engaged, by means of the gripper arm, from a magazine position located at a distance from the spindle into a working position located in the spindle, while the other tool holders are retained in the magazine position. In the magazine position, each of the tool holders is inserted into a separate sheath open at the bottom, which forms a cover at least for the respective cone. With the machine tool the sheaths are located on the gripper arms.

Abstract: In the case of a machine tool having at least one tool changer for exchanging the tools of the machine tool, the tool changer comprises a gripper (13) provided with at least one movable jaw for form-locking engagement of the tools. The gripper (13) is further equipped with an actuating member (24), which is arranged for axial displacement in the longitudinal direction (30) and which, depending on its axial position, acts to open the at least one jaw for the purpose of inserting or removing the tools, or to close it for form-locking engagement of the tools. The actuating member (24) can be displaced into a first axial end position, by moving the gripper (13) asgainst a stationary stop (31) of the machine tool, for opening the at least one jaw, and can further be transferred, by closing means, into a second axial end position for closing the at least one jaw, as the gripper (13) is moved away from the stop (31).

Abstract: A machine tool is equipped with a machine bed (10) and a carriage (23) of a headstock which is guided linearly on the said bed. To this end, the machine bed is provided with a guide rail (11), while the carriage (23) is equipped with a shoe (20) running on the guide rail (11) in form-locking engagement. The shoe (20) and the guide rail (11) engage each other by flat sliding surfaces (51 to 56) formed by the surfaces (51, 53, 55) of plastic sliding pads (46, 48, 50) and by metallic surfaces (52, 54, 56). The guide rail (11) has a narrower lower portion (15) and a wider upper portion (16) comprising a projection (17) extending laterally beyond the lower portion (15). The shoe (20) is split along a horizontal plane (40) and has its upper part (30) guided by the upper face of the projection (17) and its lower part guided by the lower face of the projection (17) (FIG. 3).

Abstract: A machine tool comprises two motion units, in particular a spindle stock and a machine bed, arranged for being displaced relative to each other along one axis. A guideway is fixed to a first motion unit for guiding the displaceable motion unit, a first surface of the guideway being in contact with, and screwed to a second surface of the first motion unit. In order to prevent the guideways from being dislodged in a direction perpendicular to the longitudinal axis of the machine screws, for example when the spindle stock runs up against a stationary obstacle due to improper operation, at least one of the said surface is roughened.

Abstract: A device serves for producing mounting bores or valve bores in a wheel disk and/or a rim of a wheel of a motor vehicle. The bores are at least partly inclined relative to a center axis of the wheel. A fixture serves for mounting the wheel. A motor-operated tool is used for producing the bores.In order to achieve minimum machining times, means are provided for pivoting the said holding fixture, with the said wheel mounted therein, relative to a work table about an axis extending at a certain inclination relative to the center axis of the said wheel.

Abstract: A machine tool comprises a magazine for toolholders which can be transferred, by means of a transfer system, from a fixture arranged for being displaced in the magazine into a hand of a gripper arm.In order to guarantee that the tool holders are transferred from the magazine into the hand of the gripper in an exactly defined position, the transfer means comprises means for fixing the said toolholders against rotation.

Abstract: A machine tool comprises a travelling support (13) carrying a headstock (14) and arranged for being displaced relative to a machine table (12). The travelling support is equipped with a magazine (20). The tool magazine (20) is exchangeable. A stationary rack (24) arranged in the travelling area of the travelling support (13) carries a plurality of tool magazines (20a). Transfer means (21) are arranged on the travelling support (13) on the one hand and the rack (24) on the other hand for exchanging tool magazines (20, 20a) between the rack (24) and the travelling support (13) (FIG. 3).

Abstract: A machine tool comprises a spindle stock (11) in which a spindle (13) is seated for rotation about a spindle axis (14). The spindle (13) is provided with a receptacle (20) for the taper (21) of a toolholder (22). A first annular groove (31) is arranged in a stationary ring bearing (12) of the spindle stock (11), adjacent a first end of at least one duct (34) provided in the rotatable spindle (13), the other end of which terminates in a blow-off outlet (35) opening into the receptacle (20). The first annular groove (31) can be connected to a compressed-air source (38). In the stationary condition of the spindle (13), an elastic annular seal (42, 43) can be applied in sealing relationship between the stationary bearing ring (12) and the spindle (13), on both sides axially of the first annular groove (31), by the action of compressed air. A second and a third annular groove (40, 41) are arranged in the ring bearing (12), on either side of the said first annular groove (31) in the axial direction.

Abstract: A machine tool comprises a spindle stock and a worktable having an upper surface thereon for mounting and machining workpieces. The worktable and the spindle stock are alternatively displaceable relative to each other in a plane parallel to the upper surface from a first position at which a first portion of the upper surface is disposed proximate the spindle stock and serves as a processing area and a second portion of said upper surface is disposed distal to said spindle stock and serves as a mounting area, to a second position at which the upper surface second portion is disposed proximate the spindle stock and serves as a processing area and the upper surface first portion is disposed distal to the spindle stock and serves as a mounting area. A splash guard wall is provided for separating the processing in the mounting areas. The splash guard wall is attached to the table upper surface by means of a hinge defining a first pivot axis.

Abstract: A machine tool comprises a work table arranged for being displaced in at least one coordinate direction relative to a spindle stock. Longitudinal drive means arranged beneath the work table are covered on both sides of the work table by means of a cover composed of telescoping elements. One of the said elements is provided in stationary arrangement adjacent one side wall of a trough enclosing the cover.In order to prevent the chips from forming into balls in front of the overlapping elements, when the extreme end position of the work table is reached, at least one opening giving access to the trough is provided on the upside of the one element, at the edge facing the side wall.