A method for a heating of a tool holder by means of an induction heating device for the purpose of a shrink-clamping and/or unshrink-unclamping of tools into and/or from tool holders includes an induction heating unit having at least one, preferably exclusively one, induction coil and is configured to expand by heating at least a portion of the tool holder, in particular at least a clamping region of the tool holder, in a shrink-clamping process or in an unshrink-unclamping process, and the induction coil is moved during an induction heating process.

An induction heating device for a shrink-clamping and/or unshrink-unclamping of tools into and/or from tool holders, in particular an induction heating unit of a shrink-clamping and/or unshrink-unclamping station for tools, comprises an induction heating unit comprising at least one induction coil which is configured to expand, by heating, at least a portion of the tool holder during a shrink-clamping and/or unshrink-unclamping process, and includes at least one shielding unit which is at least configured for a shielding of an induction magnetic field generated by the induction heating unit at least substantially at least in an axial direction of the induction coil, wherein the induction heating unit and the shielding unit form structural units which can be operatively decoupled from each other and can thus be moved relative to each other at least in the axial direction.

A heater for shrink fit chucks has a heating cover, a blocking piece, and an adjustable blocking set. The heating cover has a first through hole, a second through hole, and a heating space disposed within the heating cover, extending along an extending direction to form the first through hole and the second through hole, and communicating with a heat gun. The blocking piece is detachably connected to the heating cover to block the first through hole and has a communicating hole capable of communicating with the first through hole. The adjustable blocking set is connected to the heating cover and has two blade assemblies and a switching component. Each blade assembly has blades disposed annular along the extending direction. The switching component is rotatable and capable of pushing the blades to move toward or depart from each other for blocking the second through hole.

A die-casting sleeve comprising an outer cylinder made of a low-thermal-expansion metal material, and an inner cylinder shrink-fit into the outer cylinder; an outer peripheral surface of the outer cylinder being provided with a flange for fixing the die-casting sleeve to a stationary die block of a die-casting machine; the inner cylinder being constituted by a front member of a low-thermal-expansion metal material arranged on the injection opening side, and a rear member of silicon-nitride-based ceramics arranged in close contact with a rear end surface of the front member; the outer cylinder having an average thermal expansion coefficient .sub.A of 110.sup.6/ C. to 510.sup.6/ C. between 20 C. and 200 C.; the front member having an average thermal expansion coefficient .sub.B of 110.sup.6/ C. to 510.sup.6/ C. between 20 C. and 200 C.; the difference between .sub.A and .sub.B being 110.sup.6/ C. to 110.sup.6/ C.; and the axial length L.sub.1 (mm) and inner diameter D.sub.in (mm) of the front member, and the distance L.sub.2 (mm) from a tip end of the outer cylinder to a rear end of the flange meeting D.sub.inL.sub.1L.sub.2+20.

A hot air arbor heater has a bottom plate, an arbor placing base, a support unit, a hot air gun assembly, and a cooling assembly. The bottom plate has an installation portion and an adjusting portion. The arbor placing base is mounted on the installation portion of the bottom plate. The support unit is mounted on the adjusting portion of the bottom plate. The hot air gun assembly is fixed to the support unit. The hot air gun assembly has a hot air gun and a heating hood. The hot air gun is fixed to the support unit. The heating hood is fixed to the hot air gun. The cooling assembly is fixed to the support unit.

An induction coil unit for heating a sleeve portion of a tool holder which has a receiving opening for a shank of a rotary tool, the sleeve portion holds the shank of the tool seated in the opening in a press fit and releases it upon heating. The induction coil unit has a holding apparatus for holding the tool holder, a coil arrangement that encloses the sleeve portion during a heating operation, and a magnetic flux concentrator arrangement that is arranged near the free end of the sleeve portion. A detector for detecting a property of the tool holder held by the holding apparatus is provided. An actuator for adapting an operating parameter of the heating operation is further provided along with a controller that communicates with the detector to obtain data relating to the tool holder, and with the actuator to direct the adaptation of the operating parameter.

A shrink-clamping cooling device for a cooling of, in particular previously heated, tool holders comprises at least one cooling element which forms a cooling region for creating a heat-conductive contact with the tool holder that is to be cooled, wherein

that the cooling element comprises a contact switch, which is configured to detect at least a laying-in, and in particular a presence and/or a taking-out, of the tool holder that is to be cooled in the cooling region/out of the cooling region.

A shrink fit adapter for a collet chuck has a rear holding area that can be mounted inside a collet chuck and a front receiving area for holding a tool shank. A through opening runs from a front face of the receiving area to a rear face of the holding area. A clamping area extends into the rear holding area. Here, the adapter is formed with a plurality of slots, which extend radially outward from the through opening and are distributed over the circumference. The slots are arranged in a central area of the through opening and the front ends of the slots are spaced apart from the front face of the receiving area.

An induction heating device for a shrink-clamping and/or unshrink-unclamping of tools into and/or out of tool holders has an induction heating unit with at least one first inductor and at least one second inductor, which is preferably realized separately from the first inductor, wherein the first inductor and the second inductor are configured to respectively expand at least a portion, in particular different portions, of the tool holder by inductive heating in a shrink-clamping and/or unshrink-unclamping process, and has an electric supply unit, wherein the inductors are configured to output respectively different energies to different subregions of a tool holder, which are in a heating operating respectively encompassed by the inductors, as one of the inductors has more windings than the other inductor, in particular by at least 10%, preferably by at least 20% and preferentially by at least 30% more windings, and/or as the electric supply unit is at least configured to operate the first inductor and the second inductor in different manners.

Tool holder has a first section adapted to be connected to a machining center and a tool holding section comprising a bore with a surface defining an inner diameter of the bore. Dispersed around the surface of the bore and at least partially embedded in the surface of the bore is a joining compound having a Young's modulus greater than a Young's modulus of the surface of the bore.