Abstract:
Fixtures and methods for induction heating of bored parts are described. The fixtures and methods may be used to counter the effects of convective heat transfer and thereby promote a more uniform temperature distribution around a bore of a bored part being heated. The fixture includes a base including one or more locators engaged with the part and locating the base relative to the part, and an induction heating coil supported by the base. The induction heating coil is disposed inside the bore of the part and is inductively coupled to the part. The induction heating coil is wound about a coil axis which is non-coaxial with a bore axis of the bore of the part during heating of the part.
Abstract:
The induction coil unit for heating a component that is rotationally symmetrical relative to an axis (7), in particular a tool holder (5), comprises a plurality of coils (19) arranged about the axis (7) of the tool holder (5) with pole elements, which are movable radially with respect to the axis (7), which are connected to one another by a common yoke ring (17). Upon excitation of the coils (19) with alternating current, the latter produce a magnetic flux running in the peripheral direction in the tool holder (5) for the inductive heating of the tool holder (5). The induction coil unit (1) can be moved in an oscillating manner by means of a drive (87) in the direction of the axis (7), the pole elements (21) moving in an oscillating manner along the tool holder (5). An induction coil unit of this type is in a position to heat a comparatively large region of the tool holder (5) despite a comparatively small energy requirement and comparatively small dimensions.
Abstract:
The induction coil unit for heating a component which is rotationally symmetrical relative to an axis, in particular a tool holder (5), comprises a plurality of coils (19) arranged about the axis (7) of the tool holder (5), with pole elements (2), which are movable radially with respect to the axis (7), of which pole elements each one consists of a stack of pole rods (25) that can be moved relative to one another. A yoke ring (17) connects the pole elements, which, when the coils (19) are excited by alternating current in the tool holder (5), produce a magnetic flux running in the peripheral direction to inductively heat the tool holder (5). The pole rods (25) of each pole element (21) can be moved jointly by means of pinion rollers (29), wherein, however, slide couplings or the like are provided in the drive force transmission path between the individual pole rods so that the pole elements (21) can adapt to different contours of the tool holder (5). Blocking mechanisms, by means of which abutment contact of the pole rods with the receiving sleeve (3) of the tool holder (5) can be prevented in a controlled manner, are associated with at least a part of the pole rods (25) of each pole element. By means of a configuration of end faces of the pole pieces (25) that varies along the axis (7) of the tool holder (5), a uniform heating in the axial direction can be achieved.
Abstract:
The invention relates to a tool holder (1) for clamping tools by shrink fit. The tool holder, due to its specific shaping in the area of the shrink-fit head (6) and the shrink-fit base (5) of the tool holder, is less prone to oscillate than known tool holders, therefore allowing inter alia higher speeds so that the cutting capacity, determined by the speed of the tool, the tool feed and the cutting depth of the tool, can be increased and the machine running times required to produce a workpiece can be reduced. The tool holder (1) of the present invention allows to produce and machine workpieces in a substantially more efficient and economical manner.
Abstract:
A shrink-fit tool (21) includes a tool and a toolholder, one of the tool (23) and the toolholder (25) having a male shank portion (27) and the other one of the tool (23) and the toolholder (25) having a body portion (29) including female opening (31) for receiving the shank portion (27), the female opening (31) being adapted to change in size upon heating the body portion (29) to receive the shank portion (27) and upon cooling of the body portion (29) to clamp the shank portion (27) by an interference fit. The shrink-fit tool (21) also includes a mechanical retention member (33) disposed between the shank portion (27) and the body portion (29) for mechanically retaining the shank portion (27) in the female opening (31) so that the shank portion (27) is in its only predetermined orientation relative to the body portion (29).
Abstract:
A pick tool comprising an insert and a steel holder for the insert, the insert comprising a superhard tip joined to a cemented carbide support body having an insertion shank; the steel holder comprising a shaft for connection to a tool carrier and provided with a bore configured for receiving the insertion shank; the volume of the cemented carbide support body being at least 6 cm3.
Abstract:
The invention relates to a device for drying a work piece, preferably in the form of a shrink fit chuck, that has previously been subjected to an application of a liquid and is essentially rotationally symmetrical around a longitudinal axis of the work piece; the device has at least one air-conducting device that encompasses the work piece in order to convey an air flow in the direction along the longitudinal axis of the work piece and has at least one blower device that directs a radial air flow at the work piece.
Abstract:
The invention relates to a device for cooling an object that was previously subjected to a heat application, generally a multi-piece composite, particularly in the form of a shrink-fit chuck into which the shank of a tool was chucked or from which it was removed (cooling device), wherein the device comprises a pump, by way of which it generates a carrier gas flow, particularly an air flow, which is charged with a liquid cooling medium, particularly water, so that a coolant flow, the majority of the volume of which consists of the carrier gas, is created, which then spreads over at least the section of the object to be cooled.
Abstract:
An attenuating adaptor is proposed in the form of a sleeve (23) which is composed of non-ferromagnetic metal for insertion radially during operation between a holding section (11) (which is provided with a central holding opening (15) for holding a tool shank with a press fit) of a tool holder (1) and an induction coil arrangement (19) (which concentrically surrounds the holding section (11) in order to widen it thermally) of a shrinkage appliance (5) which feeds alternating current to the induction coil arrangement (19). The sleeve (23) can be provided with slots which pass through its wall and whose number, axial length and circumferential width influence the attenuating characteristics of the sleeve (23). Sleeves (23) of different sizes are provided for a set of different tool holders (1), and their attenuating characteristics are chosen such that all of the tool holders (1) in this set can be shrunk using one and the same setting of the shrinkage appliance (5).
Abstract:
The invention relates to a method for fixing a tool (10, 22, 64), especially a shaft tool, in a clamping chuck (8, 18, 60), whereby the tool (10, 22, 64) is introduced into the clamping chuck (8, 18, 60) and fixed therein (8, 18, 60) upon reaching an axial nominal position. According to the invention, the tool (10, 22, 64) is brought against an abutment (42, 70) and the position of a characteristic element of the tool (10, 22, 64) is measured. The tool (10, 22, 64) is positioned in the axial nominal position by moving the abutment (42, 70) along a positioning section (Z1) calculated from the measurement.