A method for joining members includes: providing a wall surface body which is a die-molded article provided with a hole portion with a draft angle provided from its opposite end portions toward its center portion, a tubular body with a hollow shape, and an elastic body; inserting the tubular body into the hole portion in the wall surface body; inserting the elastic body into the inside of the tubular body; and compressing the elastic body in the direction of an axial line L of the tubular body to expand the elastic body outwardly in the radial direction of the axial line L, thereby deforming and expanding the tubular body to joint the tubular body to the wall surface body by press-fitting.

A clamping device for manufacturing an assembled camshaft for valve-controlled internal combustion engines, in which at least one cam disc with a base circle region and cam region is machined on the running surface and has a cam-disc recess, includes shrinking the cam disc onto a corresponding shaft designed with a defined dimensional overlap by cooling the shaft and heating the cam disc. Before being shrunk onto the shaft, the at least one cam disc is clamped by the clamping device such that a tension force acts on the recess wall region, the tension force corresponding to a predetermined extent to the state of stresses and/or deformation state of the recess wall region after the operation of shrinking the cam disc onto the corresponding shaft. The running-surface machining of the at least one cam disc occurs when the cam disc is clamped by the clamping device.

A clamping device for manufacturing an assembled camshaft for valve-controlled internal combustion engines, in which at least one cam disc with a base circle region and cam region is machined on the running surface and has a cam-disc recess, includes shrinking the cam disc onto a corresponding shaft designed with a defined dimensional overlap by cooling the shaft and heating the cam disc. Before being shrunk onto the shaft, the at least one cam disc is clamped by the clamping device such that a tension force acts on the recess wall region, the tension force corresponding to a predetermined extent to the state of stresses and/or deformation state of the recess wall region after the operation of shrinking the cam disc onto the corresponding shaft. The running-surface machining of the at least one cam disc occurs when the cam disc is clamped by the clamping device.

In a method for joining members of the present invention, a B-pillar, a rocker, a side panel served as frame members of a vehicle body, and an elastic body are provided. The B-pillar includes a tubular portion and an extension portion extended from the tubular portion. The rocker includes a first hole portion. The side panel includes a support portion. Next, the tubular portion of the B-pillar is inserted into the first hole portion of the rocker. The elastic body is inserted into the tubular portion of the rocker. The elastic body is pressurized in an axial line L1 direction of the tubular portion of the B-pillar to be expanded outward in a radial direction of the axial line L1, so that the tubular portion of the B-pillar is expanded and deformed to be joined to the first hole portion of the rocker by press-fitting. Further, the extension portion of the B-pillar and the support portion of the side panel are joined by a method different from joining by press-fitting.

In a method for joining members of the present invention, a B-pillar, a rocker, a side panel served as frame members of a vehicle body, and an elastic body are provided. The B-pillar includes a tubular portion and an extension portion extended from the tubular portion. The rocker includes a first hole portion. The side panel includes a support portion. Next, the tubular portion of the B-pillar is inserted into the first hole portion of the rocker. The elastic body is inserted into the tubular portion of the rocker. The elastic body is pressurized in an axial line L1 direction of the tubular portion of the B-pillar to be expanded outward in a radial direction of the axial line L1, so that the tubular portion of the B-pillar is expanded and deformed to be joined to the first hole portion of the rocker by press-fitting. Further, the extension portion of the B-pillar and the support portion of the side panel are joined by a method different from joining by press-fitting.

A method may be utilized to produce a steering spindle part configured as a hollow shaft and having a connecting portion at its end. At least a part of the connecting portion includes increased wall thickness relative to a portion of the steering spindle part adjoining the connecting portion. The method may involve providing a circular, hollow cylindrical tube with an inner surface that is smooth in a circumferential direction, providing a circular, hollow cylindrical sleeve with an outer surface that is smooth in a circumferential direction, inserting the sleeve into an end portion of the tube, and jointly deforming the end portion of the tube and the sleeve such that a flow of material occurs. This flow may form positively locking elements on the tube and the sleeve that engage into one another in the circumferential direction and generate positive locking in the circumferential direction.

A device for manipulating a hollow shaft configured to create a pivot link between a first element and a second element. The manipulation device comprises a cylindrical body having a diameter variable by radial contraction or radial expansion of the cylindrical body, a module for controlling the diameter of the cylindrical body configured so that the diameter of the cylindrical body has alternatively at least a first diameter suitable for the cylindrical body to be displaced in the hollow shaft and a second diameter suitable for the cylindrical body to be blocked in the hollow shaft. The cylindrical body comprises an end configured to protrude from the hollow shaft when the cylindrical body is blocked in the hollow shaft. The manipulation device allows the alignment of the orifices due to the end configuration of the cylindrical body.

A tube expansion tool includes a female screw member that rotates by an electric motor. A screw shaft engages the female screw member to move in a front-rear direction. A front-end position sensor detects that the screw shaft has reached a front-end position. The screw shaft stops moving forward by a braking operation. A controller controls the braking operation of the electric motor. When the controller determines that the screw shaft has reached the front-end position based on a signal from the front-end sensor, the controller performs the braking operation. Also, when the controller detects that the screw shaft stops, the controller rotates the electric motor in a reverse direction to move the screw shaft rearward.

A tube expansion tool includes a female screw member that rotates by an electric motor. A screw shaft engages the female screw member to move in a front-rear direction. A front-end position sensor detects that the screw shaft has reached a front-end position. The screw shaft stops moving forward by a braking operation. A controller controls the braking operation of the electric motor. When the controller determines that the screw shaft has reached the front-end position based on a signal from the front-end sensor, the controller performs the braking operation. Also, when the controller detects that the screw shaft stops, the controller rotates the electric motor in a reverse direction to move the screw shaft rearward.

A vehicle structural member 1 includes a tube body having an expanded tube portion that is partially expanded, and a wall surface body having a first wall provided with a first through-hole, a second wall provided with a second through-hole, and a connecting wall connecting the first wall and the second wall. The tube body is inserted through the first through-hole and the second through-hole, and is joined to the wall surface body by being pressure welded to the first through-hole and the second through-hole. The expanded tube portion is provided only between the first wall and the second wall.