Abstract:
PROBLEM TO BE SOLVED: To provide an improved structure of a vehicle body frame assembly having reduced weight and can easily be secured. SOLUTION: The vehicle body frame assembly 10 comprises a pair of longitudinally extending side rails 11 and 12 having a plurality of transverse cross members 13, 14 and 15 extending therebetween. The cross member is a multiple piece structure, and the central portion is formed from a first metallic material, while the end portions are formed from a second metallic material. The end portions of the cross member can be secured to the ends of the central portion by any desired process, such as by magnetic pulse welding. The cross members 13, 14 and 15 can be secured to the side rails 11 and 12 either by magnetic pulse welding or by regular welding. COPYRIGHT: (C)2004,JPO
Abstract:
A method and apparatus for permanently joining two or more metallic vehicle frame components using magnetic impulse welding techniques is disclosed. In a first embodiment, an overlap joint is formed by the joinder of two individual open channel side rail sections to form a portion of a vehicle frame side rail. The first side rail section is initially formed slightly smaller in size than the second side rail section so that it may be disposed telescopically therein with clearance. An electromagnetic coil is provided for generating a magnetic field which causes the side rail sections to move toward one another at a high velocity. The high velocity impact and the large pressures cause the two side rail sections to weld or molecularly bond. Alternatively, a bracket can be joined to a side rail section in a similar manner. In a second embodiment, a pair of closed channel structural members are formed using hydroforming techniques. The end portions of two hydroformed structural members are then disposed concentrically within an electromagnetic coil. When energized, the electromagnetic coil causes the end portions to move toward one another so as to weld or molecularly bond.
Abstract:
A method and apparatus for joining metallic vehicle frame components using magnetic impulse welding techniques is disclosed. In a first embodiment, an overlap joint is formed by the joinder of two individual open channel side rail sections (12, 13) to form a portion of a vehicle frame side rail. The first section (12) formed slightly smaller in size than the second section (13), it disposed telescopically therein with clearance. An electromagnetic coil (50) generates a magnetic field which causes the sections (12, 13) to move toward one another at a high velocity. The high velocity impact and the large pressures cause the two sections (12, 13) to weld. Alternatively, a bracket can be joined to a side rail section in a similar manner. In a second embodiment, a pair of closed channel structural members are formed using hydroforming techniques. The end portions of two hydroformed structural members are then disposed concentrically within an electromagnetic coil which causes the end portions to move toward one another so as to weld bond.
Abstract:
A method and apparatus for joining metallic vehicle frame components using magnetic impulse welding techniques is disclosed. In a first embodiment, an overlap joint is formed by the joinder of two individual open channel side rail sections (12, 13) to form a portion of a vehicle frame side rail. The first section (12) formed slightly smaller than the second section (13) is disposed telescopically therein with clearance. The adjacent surfaces of the sections (12, 13) are plasma or flame sprayed with a neutral interface metal. An electromagnetic coil (50) generates a magnetic field which causes the sections (12, 13) to move toward one another at a high velocity. The high velocity impact and the large pressures cause the two sections (12, 13) to weld. In a second embodiment, a pair of closed channel structural members are formed using hydroforming techniques. The end portions of the hydroformed members are then disposed concentrically within an electromagnetic coil which causes the end portions to move toward one another so as to weld.
Abstract:
A method for manufacturing an assembly of first and second components, such as an end fitting (20) and a driveshaft tube (16) for use in a vehicular drive train system (10). Initially, a yoke is provided including a body (21) having a recess (21a) provided therein and a pair of yoke arms (22,23). The recess defines an inner body portion (21b) and an outer body portion (21c) in the yoke. A portion of a driveshaft tube inserted within the recess between the inner body portion and the outer body portion. If desired, one or more retaining structures or an adhesive material may be provided on either or both of the driveshaft tube or the yoke. Then, a magnetic pulse forming process is performed to deform the outer body portion of the body of the yoke into engagement with the portion of the driveshaft tube to provide a combined driveshaft tube and yoke assembly.
Abstract:
A method for manufacturing a driveshaft for use in a vehicle drive train system that is axially collapsible in the event of a collision to absorb energy. A workpiece, such as a hollow cylindrical tube, is deformed by hydroforming to provide an axial collapse initiation zone. The axial collapse initiation zone can be defined by a plurality of axially extending undulations or corrugations that are formed in a central portion of the tube. The axial collapse initiation zone is designed to accommodate the transmission of torque through the driveshaft without any deformation under normal operating conditions. However, if a relatively large axial force is applied to the front and rear end portions of the driveshaft, the axial collapse initiation zone is designed to allow relative axial movement to occur between the front and rear end portions of the driveshaft. Such collapsing functions to absorb energy during a collision, thereby providing additional safety to the occupants of the vehicle. If desired, the driveshaft can be hydroformed to include integral yoke portions on the ends thereof.
Abstract:
A method for manufacturing a driveshaft for use in a vehicle drive train system that is axially collapsible in the event of a collision to absorb energy. A workpiece, such as a hollow cylindrical tube, is deformed by hydroforming to provide an axial collapse initiation zone. The axial collapse initiation zone can be defined by a plurality of axially extending undulations or corrugations that are formed in a central portion of the tube. The axial collapse initiation zone is designed to accommodate the transmission of torque through the driveshaft without any deformation under normal operating conditions. However, if a relatively large axial force is applied to the front and rear end portions of the driveshaft, the axial collapse initiation zone is designed to allow relative axial movement to occur between the front and rear end portions of the driveshaft. Such collapsing functions to absorb energy during a collision, thereby providing additional safety to the occupants of the vehicle. If desired, the driveshaft can be hydroformed to include integral yoke portions on the ends thereof.
Abstract:
A method and apparatus for permanently joining two or more metallic vehicle frame components using magnetic impulse welding techniques is disclosed. In a first embodiment, an overlap joint is formed by the joinder of two individual open channel side rail sections to form a portion of a vehicle frame side rail. The first side rail section is initially formed slightly smaller in size than the second side rail section so that it may be disposed telescopically therein with clearance. An electromagnetic coil is provided for generating a magnetic field which causes the side rail sections to move toward one another at a high velocity. The high velocity impact and the large pressures cause the two side rail sections to weld or molecularly bond. Alternatively, a bracket can be joined to a side rail section in a similar manner. In a second embodiment, a pair of closed channel structural members are formed using hydroforming techniques. The end portions of two hydroformed structural members are then disposed concentrically within an electromagnetic coil. When energized, the electromagnetic coil causes the end portions to move toward one another so as to weld or molecularly bond.
Abstract:
An apparatus for manufacturing vehicle frame components using composite fiber pultrusion techniques includes one or more sources of a fibrous material. A bath or similar structure is provided for applying a resin material to the fibrous materials from the sources. Following the application of the resin, the fibrous materials are then pulled through a die. The die is formed having an opening therethrough which corresponds in shape to the desired cross sectional shape of the vehicle frame component to be manufactured. As the fibrous materials are pulled through the die, they conform to the shape of the opening formed therethrough. Because of the resin applied thereto, the fibrous materials adhere to one another to form a pultrusion which retains the shape of the opening formed through the die. The formed pultrusion is then pulled through a curing oven which heats the resin to a predetermined curing temperature, causing it to harden a rigid condition. As a result, the pultrusion as a whole acquires a desired rigidity. Movement of the fibrous materials and of the pultrusion is effected by means of a pulling device. Following passage through the pulling device, the pultrusion is cut to desired lengths by a conventional cutting machine. Additionally, openings of desired sizes and shapes may be formed in the pultrusion by a convention perforation machine. Pultrusions of different shapes and sizes may be used to form side rails which are permanently joined together by transversely extending cross members by adhesive to form the vehicle frame component.
Abstract:
A method for manufacturing an assembly of first and second components, such as an end fitting (20) and a driveshaft tube (16) for use in a vehicular drive train system (10). Initially, a yoke is provided including a body (21) having a recess (21a) provided therein and a pair of yoke arms (22,23). The recess defines an inner body portion (21b) and an outer body portion (21c) in the yoke. A portion of a driveshaft tube inserted within the recess between the inner body portion and the outer body portion. If desired, one or more retaining structures or an adhesive material may be provided on either or both of the driveshaft tube or the yoke. Then, a magnetic pulse forming process is performed to deform the outer body portion of the body of the yoke into engagement with the portion of the driveshaft tube to provide a combined driveshaft tube and yoke assembly.