A load measuring arrangement for a collet assembly is provided. The load measuring arrangement includes a housing having a pocket which includes a first portion and a second portion. The load measuring arrangement further includes a first clamp member having a first groove and a second clamp member having a second groove. The first clamp member and the second clamp member are disposed in the first portion such that the first groove and the second groove together forms a receiving portion. A load measurement device is disposed next to the second clamp member in the second portion such that a load-responsive portion of the load measurement device is configured to be in contact with the second clamp member. The second clamp member is pushed outwards against the load-responsive portion when the receiving portion receives the collet assembly.

A control method for the use of a core drilling system including a core drill and a feed device for driving the core drill along a machine holding device. The method includes the steps of determining the end of a core drilling operation on the basis of reaching a predetermined threshold value for at least one corresponding predefined drilling parameter; and of selecting a reversing mode for retracting a drilling tool out of a borehole at a reversing rotational speed which corresponds to a multiple of a predetermined tapping rotational speed of the drilling tool at the beginning of the core drilling operation.

A method for drilling an element to be drilled by a drilling device and a cutting tool including drill margins and cutting edges. The method includes determining at least one load value representing overall drag due to internal friction of the drilling device and to friction of drill margins in the element to be drilled. Determining includes: stopping a drilling operation in progress; partial retraction of the cutting tool on a predetermined distance, the predetermined distance being chosen such that the cutting edges are no longer in contact with the element to be drilled; driving the cutting tool with predetermined cutting parameters; measuring at least one load value during the driving of the cutting tool with the cutting parameters before its cutting edges again come into contact with the element to be drilled and after stabilization of the load values, the measured load value representing the overall drag.

A tool post of a machine tool, in which the tool post is capable of receiving a cutting insert for machining a component, is provided. The tool post includes at least one sensor capable of determining a parameter representative of a cutting action between a component to be machined and a cutting insert; and a support housing which is electrically connected to the sensor and includes a battery and a printed circuit board supplied with current by the battery. The printed circuit board supports, at least partially, a radio transmission unit. The housing includes a base and a cover which can be detached from one another. The battery is supported by the cover and the printed circuit board by the base or vice versa.

A drill guide device comprising a speed detection device for measuring speed of a drill bit used by the device for drilling an object surface during a hand drilling operation; a force detection device for measuring force applied by the drill bit on the object during the hand drilling operation; an alignment detection device for detecting alignment of the drill bit with respect to the object surface during the hand drilling operation; a user interface connected to the speed detection device, the force detection device and the alignment detection device adapted to communicate to a user information related to the speed, the force and the alignment of the drill bit during the hand drilling operation. The drill guide device is preferably used for training technicians on hand drilling the object surface using a required range of force, speed and alignment, particularly muscle memory training of technicians on these required parameters.

A machine tool for carrying out operations on a part includes a longitudinal rail, a transverse arm, a module for connection between the transverse arm and the longitudinal rail, the module being fitted in translation on the longitudinal rail, a tool which is supported by the transverse arm, and a retention unit which is arranged at one end of the transverse arm, and includes at least one sucker. The machine tool has an assembly configurationin which the retention unit and the tool are positioned respectively on both sides of the longitudinal rail, such that the tool is fitted cantilevered relative to the longitudinal rail. This provides the machine tool with great polyvalence, in that it makes it possible to carry out operations in areas which in particular have significant curvatures, which are difficult to access, or which are unsuitable for securing of the sucker(s) of the retention unit.

A counter bearing for machining spindles of machine tools has at least one expansion bushing with an elastically deformable wall that delimits at least one pressure chamber. The pressure chamber accommodates a pressure medium. A supply line for the pressure medium opens into the pressure chamber. A pressure conduit opens into the pressure chamber. A mechanically actuatable pressure element is disposed in the pressure conduit and actuated by an actuating tool. A piston is slidably arranged in the pressure conduit and actuated by the pressure element, wherein the piston loads the pressure medium.

A control method for the use of a core drilling system including a core drill and a feed device for driving the core drill along a machine holding device, including the following method steps:determining the end of a core drilling operation on the basis of reaching a predetermined threshold value for at least one corresponding predefined drilling parameter; andselecting a reversing mode for retracting a drilling tool out of a borehole at a reversing rotational speed which corresponds to a multiple of a predetermined tapping rotational speed of the drilling tool at the beginning of the core drilling operation. A feed device, a core drill, as well as a core drilling are also provided.

A method for pushing, with a force a tool at the end of an articulated arm against a surface with a normal, including the steps of: positioning the tool against the surface; applying an increasing force to the tool until reaching a value, corresponding to a fraction of the force, the value of the applied force being monitored; measuring the orientation of the tool with respect to the normal, after having reached the force value; and redirecting the tool so as to recover its initial orientation with respect to the normal. Iteration is carried out to proceed, by repetition of steps to, while progressively increasing the force at each iteration, and until reaching the force value, the increase increment between two successive steps being smaller than a determined value.

A method of determining a depth of a hole formed in a work piece is disclosed. The method includes determining the hole depth based upon a load signal indicative of a load on a tool forming the hole during the forming of the hole. The hole depth determined is then adjusted with an offset and component specifications are combined with the hole length to determine a component specification for use in the hole to fix components together. At least a part of the depth determination and component specification can be carried out automatically in a computer, for an array of holes.