A transmission wheel assembled of at least two segments (1) on a shaft (12), the inner arc surface (3) of which and the shaft (12) have essentially the same radius (R), and which segments' (1) outer surfaces (9) have profiled surfaces that transmit the power of the transmission wheel. Between the segments' (1) welded-together end faces (4) there are gaps on those sections of the end faces (4) that are not welded, which creates a press fit between the shaft (12) and the inner arc surface (3) of the transmission wheel. The weld connecting the transmission wheel segments' (1) end faces (4) may be incomplete, meaning that it does not reach the shaft (12).

A joining method of joining two pieces of subjects to be joined together, the subjects being a first member and a second member that has a joint insertion portion in which the first member is inserted, the method including: heating the second member that is set in an expansion restricting member and in which the first member is inserted to the joint insertion portion to first temperature to cause the second member to have thermal expansion and thereby causing the joint insertion portion to have plastic deformation in a direction in which a diameter shrinks with mechanically restricting thermal expansion of the second member by an inner surface of the expansion restricting member; and cooling the second member after the heating to join the first member and the second member together.

A device made of a temperature control device (1) and a stirring head (2), wherein the temperature control device (1) comprises an adapter (3), and the adapter (3) comprises an outer adapter surface (7), an adapter interior (8) with an inner adapter surface (9), and a temperature control element (10) for heating the adapter (3) to an operating temperature, and wherein the adapter (3) is open on a face side toward the adapter interior (8), and the stirring head (2) has a bearing hub (4) with an outer bearing hub surface (5), an inner bearing hub surface (6) and a bearing bush, and the bearing bush is positively fitted into the bearing hub (4), while abutting the inner bearing hub surface (6), and wherein the adapter interior (8) is designed for accommodating the bearing hub (4), with the outer bearing hub surface (5) abutting the inner adapter surface (9) essentially completely.

A method for inserting an insert into a hole in a composite material made from a plurality of carbon fiber layers suspended in a resin material includes lowering a temperature of the insert to a reduced temperature at which a coefficient of thermal expansion of a material of the insert causes the insert to contract to a first perimeter, inserting the insert at the reduced temperature into the hole, and permitting the temperature of the insert to increase from the reduced temperature to an operational temperature. At the operational temperature, the insert expands to a second perimeter so that the insert is retained within the composite material due to an interference between the insert and the composite material. The interference transfers a structural load from the insert to the composite material and results in damage to the composite material if the insert is dislodged at the operational temperature.

A first component (16) for a personal care device comprises a first coupling interface for allowing the first component (16) to be releasably and repeatably coupled to a second component for the personal care device via a second coupling interface of the second component. The first coupling interface comprising a portion of material (38) that can change shape with changes in temperature to couple the first coupling interface to the second coupling interface. The portion of the material (38; 60) is configured to deform during coupling and uncoupling, and to revert towards an original shape after the first coupling interface and the second coupling interface have been coupled or uncoupled. The invention also provides a personal care device (10) comprising the first component (16; 12), and the second component (12; 16) having the second coupling interface.

A method and apparatus for reworking a composite structure. A fastener is cooled from a first temperature to a second temperature at which a diameter of a post of the fastener is reduced by a desired amount. The post of the fastener is placed into a channel in a bushing such that a desired interference fit occurs when the fastener is at the first temperature. The bushing with the fastener is positioned in a hole in the composite structure. A gap is present between an outer surface of the bushing and an inner surface of the hole. A gap is also present between an end of the bushing and a second structure.

A device for jointing a plurality of elements, each comprising a cutout for a shaft, in a predetermined angular position on the shaft, may include a traversable guide carriage configured to push the shaft from above through the cutouts of the elements. The device may also include an electrical spindle drive and a pneumatic piston for displacing the traversable guide carriage.

A method of assembling mating components includes the steps of heating an inner surface of a first cavity of a first part to generate a first expansion, heating an outer surface of a component surrounding an outer periphery of the first part to generate a second expansion of the component that corresponds to the first expansion of the first part, inserting a second part into the first cavity while the first part is in an expanded condition, and cooling the first part to contract around the second part.

A method and device for assembling a composite housing fitted with a shaft and at least one associated mounted element are disclosed. The method may include the steps of: arranging the housing in a predetermined position with respect to an actuator; arranging the shaft in a predetermined position with respect to the housing and the actuator; selecting a mounting element to be mounted on the shaft; conveying the mounting element into a predetermined position within the housing; pushing the shaft via the actuator so that the shaft passes successively through an opening of the housing and an opening of the mounting element; and positioning the mounting element in a position adjacent to a heat source for a predetermined duration after the step of selecting the mounting element and prior to conveying the mounting element.

A device for heating a plurality of functional or receiving elements, such as a cam, balancing mass, gearwheel and/or a bearing, may include a plurality of holding balconies disposed above one another along an axis each associated with a respective receiving element, a plurality of workstations includes a loading station, a heating station and an unloading station, and an induction heating device including a plurality of accommodation elements. The plurality of holding balconies may be individually movable in an axial direction of an axis, and/or having a greater spacing in the axial direction with respect to one another in the loading station and/or the unloading station than in the heating station. The plurality of accommodation elements may be jointly adjustable in the axial direction.