Abstract: A tool for a chip removing machining includes a basic body and a replaceable cutting insert, which is indexable by a cutting edge exchange mechanism. The cutting edge mechanism includes an ejector, which in a front part has an attachment for the cutting insert and interacts with a device for transforming a rectilinear, axial projection of the ejector into a simultaneous turning of the same. The cutting edge exchange mechanism includes a stop collar, which is fixedly anchored in relation to the basic body, and through which the ejector is movable back and forth and a carrier included in a rear part of the ejector. In addition, between the carrier and the stop collar, there is arranged a mechanical compression spring, which spaces the carrier from the stop collar. In addition, an autonomous cutting edge exchange mechanism is disclosed.

Abstract: Metrology data associated with a plurality of workpieces processed at a selected operation in the process flow including a plurality of operations is retrieved. A processing context associated with each of the workpieces is determined. The processing context identifies at least one previous tool used to perform an operation on the associated workpiece prior to the selected operation. A plurality of performance metrics is determined for a plurality of tools capable of performing the selected operation based on the metrology data. Each performance metric is associated with a particular tool and a particular processing context. A set of the performance metrics is identified for the plurality of tools having a processing context matching a processing context of a selected workpiece awaiting performance of the selected operation. The selected workpiece is dispatched for processing in a selected one of the plurality of tools based on the set of performance metrics.

Abstract: A spindle unit comprising a solid shaft main spindle of a highly rigid material such as cemented carbide, with the main spindle being rotatably supported in a spindle head by bearings less apt to generate heat. A tool-clamping device including an adapter attached to a front end of the main spindle, and a tool holder carries a rotary tool. On of the adapter and the holder comprises a short columnar lug, with the other of the adapter and holder comprising a cylindrical hole shrinkage-fitted on the lug. The member having the hole is made of a material having a coefficient of thermal expansion lower than a coefficient of thermal expansion of the other member. The tool-clamping device further comprises heating and cooling devices for heating and cooling the member having the hole.