A drill press includes a main housing, a drill unit supported by the main housing for relative movement therewith, a base coupled to the main housing, the base having a bore formed in a top surface thereof and a magnet to create a magnetic field for magnetically latching the base to a workpiece, and a holding force detection assembly having a plug, a sensor positioned outside the plug to detect the magnetic field within the base, the sensor emitting a variable output voltage signal in response to the detected magnetic field, and a printed circuit board received within a slot in the plug. The holding force detection assembly is received within the bore formed in the top surface of the base.

A machine tool includes: a hollow spindle including a hollow portion along an axial direction; a plurality of chuck claws openably mounted at a distal end portion of the hollow spindle, and configured to hold a workpiece; an operation rod inserted into the hollow portion of the hollow spindle in a movable manner, and configured to close the plurality of chuck claws with movement of the operation rod toward one side in the axial direction and open the plurality of chuck claws with movement of the operation rod toward the other side in the axial direction; and a measuring apparatus configured to measure an opening dimension of the plurality of chuck claws based on a movement amount of the operation rod.

A workpiece holding device includes: a chuck including a chuck body, and a plurality of chuck claws openably supported on the chuck body and configured to hold a workpiece; an operation rod configured to drive the plurality of chuck claws for opening and closing with movement of the operation rod; and a measuring apparatus configured to measure an opening dimension of the plurality of chuck claws based on a movement amount of the operation rod.

A method for treating an interior weld joint located along an inner surface of a pipe includes the steps of: (a) advancing an internal grinder device within the pipe to the interior weld joint, wherein the internal grinder device includes a hollow housing that has a first open end and a first grinding implement that is disposed within the hollow housing and coupled thereto with a first biasing member; and (b) controllably rotating the hollow housing to at least a threshold speed at which time and under centrifugal force, the first grinding implement moves from an at rest retracted position to a deployed position in which the first grinding implement extends radially beyond the first open end for contacting and grinding the interior weld joint as the hollow housing and the first grinding implement are rotated.

A positioning device for positioning a drilling tool of a drilling apparatus relative to a workpiece includes a cage mounted to the drilling apparatus such that the cage at least partially surrounds the drilling tool. The cage includes an end portion that includes an alignment surface that is configured to be engaged in physical contact with a workpiece surface of the workpiece. The alignment surface of the cage is oriented relative to a centerline axis of the drilling tool such that the centerline axis extends approximately normal to the workpiece surface when the alignment surface of the cage is in contact with the workpiece surface. The positioning device also includes a laser projector mounted to the cage such that the laser projector is configured to project an illuminated dot onto the workpiece surface that indicates where the centerline axis of the drilling tool intersects the workpiece surface.

An intelligent tungsten carbide cutter may include a shank, at least a cutting portion, and a sensor. The shank made of tungsten steel comprises a first end, a second end, and at least a first connecting portion, and the first connecting portion is located adjacent to the second end of the shank. The shank and the cutting portion are thermally connected through high frequency oscillation heating method, and the cutting portion is secured on the first connecting portion of the shank. An accommodating channel axially penetrates through a center portion of the first end of the shank and extends toward the second end, and the sensor is installed in the accommodating channel so as to be positioned close to the cutting portion, thereby achieving the direct and accurate sensing.

A manufacturing system for producing airplane structural components, including a drilling unit for producing bores in a material assembly made of at least two material plies for the purposes of inserting fastening elements and having a measuring unit for ascertaining geometry parameters for a previously produced bore. The measuring unit includes measuring electronics with an optical sensor element, a measuring optical unit and a measuring lance. The measuring unit produces an optical measurement beam that emerges from the measuring lance via the measuring optical unit and that is incident on a measurement point on the respective bore inner surface. A measurement movement between measuring lance and material assembly is provided in a measurement cycle and the measuring unit cyclically ascertains distance values to various measurement points at a scanning rate during the measurement movement and ascertains at least one geometry parameter for the respective bore from the distance values.

A control method for using a core drilling system is disclosed. In an embodiment the method includes detecting a predetermined drilling situation on the basis of the attainment of a predetermined threshold value for at least one predetermined corresponding drilling parameter and ending the core drilling operation by selecting a reverse-travel mode for removing the drilling tool from the borehole if the advancing device does not reach a predetermined threshold value for a predetermined corresponding distance value in a direction and the core drilling machine does not reach a predetermined threshold value for at least one predetermined corresponding drilling parameter or continuing the core drilling operation by selecting a predetermined operating mode if the advancing device reaches a predetermined threshold value for a predetermined corresponding distance value in a direction and the core drilling machine reaches a predetermined threshold value for at least one predetermined corresponding drilling parameter.

A method for operating a machine tool that includes an electric motor for driving a drilling tool and an open- and closed-loop controller for open- and closed loop control of the motor power. The method includes: operating the machine tool in a tapping mode at a first rotational speed value, where the first rotational speed value is lower than a predetermined idling speed value of the electric motor; detecting a predetermined first threshold value for the motor current; reducing the motor current to a predetermined second threshold value when the first threshold value is exceeded; operating the machine tool at a second rotational speed value, where the second rotational speed value is lower than the first rotational speed value; operating the electric motor at a predetermined motor current value; and operating the controller for closed loop control of the motor power via the motor current with an oscillating action.

A boring head (1) with an electronic unit (20) integrated in the boring head (1) is provided, the electronic unit (20) comprising a control unit (60), a display (30) and a compartment (26) for a power source (41). The display (30) is connected to the control unit (60) and serves to display information concerning the status of the boring head (1) to a user. The compartment (26) serves to accommodate a power source (41) to supply the control unit (60) and the display (30) with electric power. The electronic unit (20) as a whole is designed as a compact subassembly of the boring head (1).