A honing machine for machining workpieces that have at least one bore to be machined by means of honing, comprises a plurality of workstations (180-1, 180-2), wherein at least one of the workstations is configured as a honing station (180-1, 180-2) that comprises at least one honing unit (150-1, 150-2) that has a spindle shaft (152) that is rotatable about a vertical spindle axis (155) by means of a rotary drive and is movable back and forth parallel to the spindle axis by means of a reciprocating drive. The honing machine has a pallet transport system (200) internal to the machine, for transporting workpieces from and to the workstations (180-1, 180-2) by means of pallets (210-1, 210-2). The pallet transport system (200) is designed such that different transport paths are freely configurable via a control unit (190) of the honing machine (200).

A honing machine for machining workpieces that have at least one bore to be machined by means of honing, comprises a plurality of workstations (180-1, 180-2), wherein at least one of the workstations is configured as a honing station (180-1, 180-2) that comprises at least one honing unit (150-1, 150-2) that has a spindle shaft (152) that is rotatable about a vertical spindle axis (155) by means of a rotary drive and is movable back and forth parallel to the spindle axis by means of a reciprocating drive. The honing machine has a pallet transport system (200) internal to the machine, for transporting workpieces from and to the workstations (180-1, 180-2) by means of pallets (210-1, 210-2). The pallet transport system (200) is designed such that different transport paths are freely configurable via a control unit (190) of the honing machine (200).

The invention teaches an environmentally friendly straw and its manufacturing method. The straw includes a tubular body having a through channel inside connecting two openings respectively at two ends of the tubular body, an outer layer surrounding the tubular body between the two openings formed by a leveling machine, an inner layer, as an inner wall of the tubular body, surrounding the channel formed by a honing machine. The straw is manufactured by leveling the tubular body, and honing the channel by a honing machine. As such, a smooth layer between the channel and the tubular body is achieved so that the straw is convenient to clean and use.

In the case of a measuring method for measuring the geometry of a drilled hole in a workpiece, a measuring system is used which has a measuring unit (110) which, in the state which is set up ready for operation, has a measuring mandrel (120) which can be moved bidirectionally along a travel path parallel to a measuring mandrel axis (125) by means of a linear drive. The measuring mandrel (120) is calibrated at least once with the use of a reference device (200) by way of at least one reference element (230-1, 230-2) of defined internal dimensions, by the measuring mandrel (120) being moved by means of the linear drive into a calibrating location, in which a measuring sensor of the measuring mandrel is arranged in the region of the reference element. During measuring operation, the reference device (200) is arranged in a neutral location outside the travel path of the measuring mandrel (125) in such a way that the measuring mandrel can be introduced into the drilled hole to be measured without dipping through the reference element. The reference device (200) is moved, in order to carry out a calibration operation, out of the neutral location into a calibrating location, in which the reference element is arranged in a calibration position coaxially with respect to the measuring mandrel axis (125). The measuring mandrel (120) is then moved by means of the linear drive into a calibrating location, in which a measuring sensor of the measuring mandrel is arranged in the region of the reference element (230-1, 230-2). In the calibrating location, a calibration measurement for calibrating the measuring mandrel (120) is carried out.

A method for producing a groove pattern on a cylinder surface includes providing an abrasive module, including an abrasive mesh article and collector block, providing a patterning head, which including the abrasive module and pressing actuator, pressing the abrasive module against the cylinder surface by using the actuator, forming a plurality of grooves on the cylinder surface by causing relative motion between the abrasive module and cylinder surface, and drawing gas through the abrasive mesh article to collect particles released from the cylinder surface. The abrasive mesh article includes a plurality of abrasive grains bonded to a flexible mesh backing, defining openings. The collector block has a curved supporting surface defining openings. The abrasive mesh article is attached to the curved supporting surface by a releasable fastening system. The openings of the flexible mesh backing are in communication with the openings of the collector block via the releasable fastening system.

The invention relates to a method for fine machining a cylindrical workpiece surface of a workpiece blank by means of a fine machining tool. Said method comprising the following steps: generating a relative rotational movement between a tool and a workpiece blank about a machining axis which is concentric to a cylindrical workpiece surface of the workpiece blank; generating a relative feed rate between the tool and the workpiece blank along the machining axis; detecting an actual value of a process variable which is a function of a relative force between the tool and the workpiece blank and which can assume a plurality of process variable values; and continuously controlling the process variable by changing the relative feed rate in such a way that the more the relative feed rate changes, the more the actual value of the process variable deviates from a desired value of the process variable.

In the case of a honing method for machining the internal face (214) of a bore (210) in a workpiece (200) with the aid of at least one honing operation, during a honing operation a flaring-capable honing tool (150) that is coupled to a spindle is moved back and forth within the bore for generating a reciprocating movement in the axial direction of the bore, and are simultaneously rotated for generating a rotating movement that superimposes the reciprocating movement. A bore shape having an axial contour profile which is rotationally symmetrical in terms of a bore axis (212) and deviates from the circular cylindrical shape is generated herein. For generating an axially variable material removal in at least one stroke modification phase a stroke length and/or a stroke orientation of the reciprocating movement is modified. A honing tool (150) which has an annular cutting group (155) having a plurality of radially actuatable cutting material members (156) that are distributed about the circumference of the tool body (152) is used herein. The honing method is distinguished in that during the stroke modification phase a measurement of the actual diameter of the bore (210) is carried out for determining a diameter measurement signal which represents the actual diameter of the bore in a measurement plane, and the stroke length and/or the stroke orientation of the reciprocating movement is controlled as a function of the diameter measurement signal. Also described is a machine tool that is suitable for carrying out the honing method. The honing method is particularly suitable for honing cylinder running faces in the production of cylinder blocks or cylinder liners for reciprocating piston engines.

A machine for machining workpieces includes a movably mounted table (1) and at least one clamp (2). Each clamp is engageable with a workpiece and can be rotatably driven relative to the table. Each workpiece is transportable by movement of the table to a first workstation (3). Workstation 3 includes a toolholder (4) that holds a tool that is operative to machine a surface of the workpiece. The toolholder is movable in engagement with the workpiece by a feed unit (5) and the orientation of the tool holder relative to the workpiece is changeable by movement of an alignment unit (6). A second workstation to which the workpiece is moved after machining includes a cleaning device (8). A third workstation to which the workpiece is moved after cleaning includes a measuring device (10) that optically determines at least one surface property of the machined surface. The measuring device is in connection with an evaluation unit (14). The evaluation unit evaluates the at least one surface property and determines a direction and an order of magnitude that the alignment unit must be adjusted so at least one subsequently machined workpiece meets required tolerance specifications.

A honing tool has a tool body and shells disposed on the tool body. Honing stone sets each provided with two or more honing stones are provided. The shells each support one of the honing stone sets. Guide bars of the honing tool are placed against the bore and a portion of the bore is conically honed with decreasing stroke of the honing tool, wherein a lower reversing point of the honing tool remains substantially unchanged. Honing is terminated as soon as an upper reversing point has reached a predetermined terminal value. Alternatively, a portion of the bore is conically honed with a constant stroke of the honing tool, wherein reversing points of the stroke of the honing tool remain substantially unchanged and a feeding force pressing the honing stones against the bore is controlled as a function of a position of the honing tool in the bore.

A honing tool has a tool body and shells disposed on the tool body. Honing stone sets each provided with two or more honing stones are provided. The shells each support one of the honing stone sets. Guide bars of the honing tool are placed against the bore and a portion of the bore is conically honed with decreasing stroke of the honing tool, wherein a lower reversing point of the honing tool remains substantially unchanged. Honing is terminated as soon as an upper reversing point has reached a predetermined terminal value. Alternatively, a portion of the bore is conically honed with a constant stroke of the honing tool, wherein reversing points of the stroke of the honing tool remain substantially unchanged and a feeding force pressing the honing stones against the bore is controlled as a function of a position of the honing tool in the bore.