Abstract: A technical object is to provide an apparatus for attaching or detaching an insert of a cutting tool, which enables easy and fast replacement of the insert. To this end, the apparatus for attaching or detaching the insert to or from a body of the cutting tool is provided in the body of the insert and includes an insert receiving portion formed in the body of the cutting tool to receive the insert therein, a wedge receiving portion formed in the body of the cutting tool continuously after the insert receiving portion, a wedge received in the wedge receiving portion, and a rotating unit configured to rotate the wedge in a first direction that faces the insert receiving portion, or to a second direction opposite the first direction.

Abstract: A rotary cutting tool or end mill is provided, the tool comprising a plurality of pairs of diametrically-opposed, symmetrical, helical flutes formed in a cutting portion of the tool body, wherein the pitch between at least one pair of adjacent helical flutes is less than or greater than the pitch of at least one other pair of adjacent helical flutes in at least one radial plane along the axial length of the flutes, a plurality of peripheral cutting edges, wherein at least one of the peripheral cutting edges has a radial rake angle different from radial rake angle of a peripheral cutting edge of a different helical flute.

Abstract: A cutting tool includes a cartridge-receiving pocket, and an adjustable cartridge assembly mounted in the cartridge-receiving pocket. The adjustable cartridge assembly includes a cartridge with an insert-receiving pocket and a wedge. The wedge has planar surfaces formed at taper angles of between greater than zero degrees and less than or equal to about five degrees that contact the bottom wall of the cartridge to move a cutting insert mounted in the insert-receiving pocket of the cartridge in a direction of a central axis of the cutting tool. The planar surfaces are at different distances from a central axis of the wedge to place the wedge in a minus, nominal or plus orientation, respectively.

Abstract: A frictional drive railway wheel truing system comprising a master lift and drive arm spaced from a slave lift and drive arm extending from within a railway pit for lifting a pair of opposed railway wheels off railway rails. Each master and slave drive assembly comprising frictional drums to turn a railway wheel from a wheel flange. A master and slave lathe assembly moveable along an axis parallel to a rotational axis of the frictional drums; each master and slave lathe assembly having a cutting bit positioned to engage a tread and a flange of a railway wheel in a cut mode at a location superior to the contact area of said frictional drums and railway wheel; and a hold down device fixing rotation of a railway wheel to a predetermined axis during a wheel truing operation.

Abstract: A rotary cutting tool has a central, longitudinal axis. One or more internal balancing features are disposed within a cavity of the rotary cutting tool. Each internal balancing feature includes a balancing mass suspended within the cavity by a spring-like element, and an adjusting screw for effecting radial movement of the balancing mass. Each internal balancing feature can be integrally-formed with the rotary cutting tool using a 3-D printing technique. The rotary cutting tool can be any rotary cutting tool, such as a milling cutter, a boring bar, and the like. The internal balancing features are arranged at predetermined locations within the rotary cutting tool to enable static and/or dynamic balancing of the rotary cutting tool.

Abstract: A cutting element (50) having a front face (52T), an opposite rear face (52B) and at least one side (52S) face extending therebetween, and comprising a cooling cavity (60) defined by a cavity surface. The cutting element (50) comprises at least one shell-like cutting zone defined by an external surface (54, 56, 58) and an internal surface. The external surface (54, 56, 58) is constituted by a cutting edge (54) defined at the intersection between the front face (52T) and the at least one side face (52S) and corresponding rake (56) and relief (58) surfaces constituted by portions of the front face (52T) and at least one side face (52S) respectively. The internal surface is constituted by a portion of the cavity surface (60), wherein the maximal distance between the cavity surface (60) and the external surface (54, 56, 58) at the cutting zone is considerably smaller than the distance between the front face (52T) and the opposite rear face (52B).

Abstract: Methods of determining movement data representing the movement of a machining tool of an optical lens lathing device for machining one or more optical surfaces or parts thereof of a set of optical surfaces are described. The methods comprise a greatest radial slope amplitude determining step during which the greatest radial slope amplitude of the optical surfaces of the set of optical surfaces is determined. The methods also comprise a machining tool selecting step during which a machining tool having a window angle greater than or equal to the greatest radial slope amplitude of the optical surfaces of the set of surfaces to be manufactured is selected. The methods further comprise a movement data determining step during which movement data representing the movement of the selected machining tool are determined and synchronized with the angular position of the optical surface driven in rotation.

Abstract: A machine tool includes one tip arranged on the spindle at a position that faces the table, a cutting edge position storing unit that stores therein multiple measured values that are obtained by performing measurement of the position of the tip at least two times in a state where the spindle is set at at least one phase and the tip is positioned at an identical point, a spindle tilt angle calculating unit that calculates a tilt angle of the spindle with respect to an XY-plane, based on the multiple measured values, and a coordinate system rotation unit that rotates the XY-plane about at least one of X-axis and Y-axis, based on the tilt angle of the spindle calculated by the spindle tilt angle calculating unit.

Abstract: A double-sided, indexable, non-positive ramping insert has a 180-degree rotational symmetry about each of the first, second and third axes of a three-dimensional Euclidean space. The ramping insert includes two first surfaces and an insert peripheral surface which extends therebetween. The ramping insert includes four cutting portions, each includes a major cutting edge, a wiper edge connected transversely thereto via a corner cutting edge and a ramping edge which extends transversely from the wiper edge in a view parallel to the first axis. Each peripheral surface includes four non-positive ramping relief surfaces, each of which extends from a respective ramping edge towards, and not beyond, a first median plane which is defined by the second and third axes.

Abstract: A technical object of the present disclosure is to provide an insert, which can maintain rigidity thereof regardless of a clearance angle of a clearance surface that forms a circular cutting edge. To this end, the insert according to the present disclosure includes a circular upper surface, a circular lower surface, and a clearance surface portion connecting the upper surface and the lower surface. The clearance surface portion is divided into first and second clearance surfaces along a circumference thereof, by a first wave line that forms a waveform of valleys facing the lower surface and mounts facing the upper surface.

Abstract: A method for selecting a milling cutter, which method makes it possible to select a milling cutter on the basis of a part to be machined such that the cutting force is constant while the part is being machined.

Abstract: A technical object is to provide an insert capable of preventing escaping of the insert from an assembly of the insert and a tool holder. To this purpose, the insert includes an insert body, and a holder fastening portion provided in the insert body to be fastened to the tool holder, in which the holder fastening portion includes one or more fastening holes formed through the insert body from an upper surface to a lower surface, and one or more locking recesses formed by being recessed in a lower surface periphery of the insert body.

Abstract: A machining tool, in particular a drill carrier tool, includes a monolithic base body extending in the axial direction which, at least in one section, has a porous or grid-like core structure that is encased in a solid outer jacket. These measures allow less material to be used, while maintaining good mechanical properties. The porous or grid-like core structure is simultaneously used for transporting coolant. The base body is manufactured in particular by means of a 3D printing method.

Abstract: The method includes a preprocessing transfer step which places an unprocessed rod-like body in a receiving position; a post-processing transfer step which pushes a processed rod-like body with the unprocessed rod-like body, and thus transfers the processed rod-like body to a rail portion; a rail portion transfer step which pushes the processed rod-like body with the unprocessed rod-like body, and thus transfers the processed rod-like body while being guided by the rail portion; a withdrawing step which withdraws the processed rod-like body from the rail portion using a withdrawing unit; a detection step which detects that the processed rod-like body is transferred from the rail portion to the withdrawing unit; and a discharge step which discharges the processed rod-like body from the withdrawing unit in a direction perpendicular to an axis of the processed rod-like body.

Abstract: A cutting insert of one aspect includes a top surface including a corner portion and a pair of side portions each adjacent to the corner portion, a bottom surface, a side surface located between the top surface and the bottom surface, and a corner cutting edge disposed at the corner portion. In such a cutting insert, the top surface includes a first rake surface located along the corner cutting edge, a raised portion located farther on the inner side than the first rake surface, and a second rake surface located between the corner cutting edge and the raised portion. Moreover, a rake angle at a first region of the second rake surface corresponding to a center of the corner cutting edge is greater than a rake angle at a second region of the second rake surface located beside the first region.

Abstract: An indexable cutting insert for face milling with high feed rates has: an upper side, a lower side with a smaller outer circumference than the upper side, and side surfaces connecting the upper and lower sides. Rounded cutting corners are formed at the transition between the side surfaces and the upper side. The cutting corners are connected via convexly arched cutting edges, each running convexly curved from one cutting corner to an adjacent cutting corner. Adjacent the cutting edges, the side surfaces have main flanks extending along the respective cutting edge in a continuously convexly curved manner from one cutting corner to an adjacent cutting corner. The main flanks extend in the direction of the lower side only over part of the height of the side surfaces and merge in a stepped manner into secondary surfaces which are set back inward.

Abstract: A rotating machining device for machining a work piece includes a support housing adapted for mounting on the work piece and a headstock rotatably mounted on the support housing about an axis. The headstock including an internal gear. A drive module is arranged to drive rotation of the headstock about the axis and at least one gear connection is formed between the internal gear and the drive module. The at least one gear connection is positioned radially inside of an outer diameter of the support housing to protect an operator from a pinch point associated with the at least one gear connection.

Abstract: A cutting insert and a cutting tool having same are provided. The cutting insert includes an upper surface, a lower surface having a flat surface, side surfaces connecting to each of the upper surface and the lower surface, and cutting edges being formed by the upper surface and the side surfaces. A first cutting edge among the cutting edges is inclined downward. A major side surface among the side surfaces comprises a first major side surface connected to the upper surface so as to constitute the first cutting edge, and a second major side surface connected to the first major side surface and the lower surface. The first major side surface has a reversely positive surface, and the second major side surface has a reversely positive surface or a negative surface, and a minor side surface among the side surfaces has a positive surface or a negative surface.

Abstract: The invention relates to a cutting tool apparatus comprising a tool head rotatingly drivable about an axis of rotation, which tool head has a tool slide adjustable along an adjustment axis and an electrical measuring device for detecting an adjustment path of the tool slide, and comprising an external display device which is mechanically and electrically releasably connectable to the tool head and has a display unit for displaying the adjustment path of the tool slide. In order to further develop the cutting tool apparatus such that its handling is simplified, it is proposed according to the invention that the display device is mechanically securable on the stationary tool head in order to set the tool slide and is automatically releasable from the tool head if a predeterminable rotational acceleration of the tool head is exceeded.

Abstract: Problem: To provide a cutting tool formed from a silicon nitride-based sintered body having high fracture resistance and having residual stress of a rake face and a flank face in an appropriate range. Solution: A cutting tool (1) formed from a silicon nitride-based sintered body containing not less than 50 volume % silicon nitride-based phase and from 10 to 30 volume % titanium nitride phase, uses an intersection ridge portion of a rake face (2) and a flank face (3) as a cutting edge (4), has a residual stress applied to the titanium nitride phase that is tensile stress, and is such that the tensile stress applied to the titanium nitride phase in the rake face (2) is greater than the tensile stress applied to the titanium nitride phase in the flank face (3).