Provided is a joint component manufacturing method for reducing occurrence of burrs upon bonding between a first member having a hole and a second member having a shaft portion and firmly bonding both members. In the method for manufacturing a joint component 100, a hole-side weak press-fit portion 112 is formed at a hole 111 of a flat plate ring-shaped first member 110. Moreover, each of a shaft-side weak press-fit portion 122 and a shaft-side strong press-fit portion 124 is formed at a shaft portion 121 of a cylindrical second member 120. The hole-side weak press-fit portion 112 and the shaft-side weak press-fit portion 122 are defined by a first weak press-fit interference Lw1 formed thinner than a first strong press-fit interference Ls1. The shaft-side strong press-fit portion 124 is defined by a first strong press-fit interference Ls1 as the minimum necessary press-fit interference for electric resistance welding upon electric resistance welding between the hole 111 and the shaft portion 121.

Provided is a joint component manufacturing method for reducing occurrence of burrs upon bonding between a first member having a hole and a second member having a shaft portion and firmly bonding both members. In the method for manufacturing a joint component 100, a hole-side weak press-fit portion 112 is formed at a hole 111 of a flat plate ring-shaped first member 110. Moreover, each of a shaft-side weak press-fit portion 122 and a shaft-side strong press-fit portion 124 is formed at a shaft portion 121 of a cylindrical second member 120. The hole-side weak press-fit portion 112 and the shaft-side weak press-fit portion 122 are defined by a first weak press-fit interference Lw1 formed thinner than a first strong press-fit interference Ls1. The shaft-side strong press-fit portion 124 is defined by a first strong press-fit interference Ls1 as the minimum necessary press-fit interference for electric resistance welding upon electric resistance welding between the hole 111 and the shaft portion 121.

Aspects of the disclosure are directed to components of an engine and one or more methods for assembling the components. A first component is positioned adjacent to a second component such that a first surface of the first component abuts the second component. A cooling plate is coupled to the first component such that a first surface of the cooling plate abuts a second surface of the first component. A loading ram is coupled to the cooling plate such that a second surface of the cooling plate abuts the loading ram.

The invention relates to the manufacturing of a rotor (23) of a high-pressure compressor. Various installation constraints are proposed in terms of temperature, angle and unevenness and/or runout defects to be considered. For example, when installing the sealing disk (25) on the first drum (27) of the rotor and/or the intermediate disk (29) on the first drum assembled with the sealing disk, axial packing (X1) is applied with a pressure ranging from 40 to 6010.sup.5 Pa.

A machine comprises a tool for pre-positioning of a body of an exhaust component and a fitting tool having a passage converging from a large opening to a small opening. An actuator device is configured to push the body along a main axis of the machine toward a cover of the exhaust component through the converging passage.

A heat treatment method is provided in which a first steel component (11) formed with a coating (111) thereon is fitted in first holes (123, 124) of a second steel component (12) subjected to a quenching treatment. The heat treatment method includes a heating step of heating the second steel component to a first temperature (T.sub.1) equal to or higher than a tempering temperature (T.sub.0) of the second steel component and higher than a temperature of the first steel component by a temperature difference (T) for achieving shrink fitting and a shrink-fitting step of shrink-fitting the first steel component in the first holes of the second steel component in a state of maintaining the temperature difference for achieving shrink fitting between the first steel component and the second steel component.

A heat treatment method is provided in which a first steel component (11) formed with a coating (111) thereon is fitted in first holes (123, 124) of a second steel component (12) subjected to a quenching treatment. The heat treatment method includes a heating step of heating the second steel component to a first temperature (T.sub.1) equal to or higher than a tempering temperature (T.sub.0) of the second steel component and higher than a temperature of the first steel component by a temperature difference (T) for achieving shrink fitting and a shrink-fitting step of shrink-fitting the first steel component in the first holes of the second steel component in a state of maintaining the temperature difference for achieving shrink fitting between the first steel component and the second steel component.

A method of manufacturing a packing cup for a hyper-compressor is described. The method comprises the following steps: providing an inner disc (25), having opposed first front face (25X) and second front face (25Y), a central axial hole (18) and at least one lubrication-oil duct (23); autofrettaging the lubrication-oil duct (23); after autofrettaging, removing a thickness (D) of the inner disc on both faces thereof.

A method and apparatus for producing a curved tubular segment includes obtaining a curved external tubular element and a curved internal tubular element. The curved internal tubular element is made of a material having a resistance to wear greater than that of the curved external tubular element and has a cross section such as to cover at least part of the internal surface of the curved external tubular element. The curved internal tubular element is inserted inside the curved external tubular element after heating the latter by a heating unit. To form the curved external tubular element on the exact geometry of the curved internal tubular element, a molding unit and a cooling unit are used to obtain a curved tubular segment without spaces between the curved external tubular element and the curved internal tubular element.

A method of manufacturing a universal joint includes: temporarily assembling a bearing, which supports a shaft portion of a joint spider such that the shaft portion is rotatable, with respect to a through-hole and the shaft portion by press-fitting the bearing to a first position in the through-hole of a yoke; and clinching, after the bearing is temporarily assembled, a portion of the yoke around the through-hole, and pressing the bearing deeper into the through-hole with a clinched portion formed by the clinching to press-fit the bearing to a second position located deeper than the first position in the through-hole.