Back to results
US 6,659,330 B2Granted
Friction stir welding method, and method for manufacturing car body
AssigneeHitachi, Ltd.
InventorsMasakuni Ezumi, Kazushige Fukuyori
Life of this patent
Estimating the term…
Abstract
A cutting tool 60 cuts along the butted portion between two members 10, 20. A filling material 30 is inserted to the gap 40 formed by said cutting, and a roller 70 presses protrusions 12 and 22 to crimp said protrusions 12 and 22 so as to fix said filling material to position. Next, friction stir welding is performed to the protrusions 12, 22 and the filling material 30 using a rotary tool 80. In another example, instead of cutting, the filling material can be welded and filled to the gap. In yet another example, cutting can be performed so as to approximate the two members before performing the friction stir welding step.
Claims25
A method of manufacturing a car body, comprising:
- mounting side members to both ends of an underframe, respectively;
- and
- positioning structure substantially on a line extending from an axial center of one rotary tool, for friction stir welding the exterior side of one side member and the exterior side of said underframe, in the following order:
- a surface plate of said underframe, a joint portion between the exterior side of the other side member and the exterior side of said underframe, and a supporting device for supporting said joint portion from the exterior side, when performing friction stir welding using said rotary tool.
1 more element
A method for manufacturing a car body, comprising:
- mounting a side structure to a hollow member on one end of said underframe;
- and
- while positioning a connecting plate connecting two surface plates of said hollow member substantially on the line extending from the axial center of a rotary tool for friction stir welding the exterior side of said side structure and the exterior side of said hollow member, performing the friction stir welding using said rotary tool.
A method for manufacturing a car body, comprising:
- mounting side structures to hollow members constituting both sides of an underframe, respectively;
- and
- positioning structure substantially on a line extending from an axial center of one rotary tool, for friction stir welding the exterior side of one side structure and the exterior side of one hollow member, in the following order:
- a connecting plate connecting two surface plates of one of said hollow members, a connecting plate connecting two surface plates of the other hollow member, a joint portion between the exterior side of said side structure and the exterior side of said other hollow member, and a supporting device for supporting said joint portion from the exterior side, when performing friction stir welding using said rotary tool.
1 more element
A method for manufacturing a car body, comprising:
- mounting side structures to both ends of an underframe, respectively;
- and
- positioning structure substantially on a line extending from an axial center of a rotary tool performing friction stir welding, in the following order:
- an exterior-side joint portion of one side structure and said underframe, the interior side thereof, a first supporting device, the interior-side joint portion of the exterior side of another side structure and said underframe, the joint portion on the exterior side thereof, and a second supporting device for supporting said joint portion from the exterior side, when performing friction stir welding using said rotary tool,
- wherein both ends of said first supporting device contact the interior side of said joint portions, respectively.
2 more elements
A method for manufacturing a car body, comprising:
- mounting a roof structure on two side structures;
- and
- positioning structure substantially on a line extending from an axial center of a rotary tool performing friction stir welding, in the following order:
- an exterior-side joint portion of one side structure and said roof structure, the interior side thereof, a first supporting device, the interior-side joint portion of the exterior side of another side structure and said roof structure, the joint portion at the exterior side thereof, and a second supporting device for supporting said joint portion from the exterior side, when performing friction stir welding using said rotary tool,
- wherein both ends of said first supporting device contact the interior side of said joint portions, respectively.
2 more elements
A method for manufacturing a car body, comprising:
- mounting a roof structure on two side structures;
- positioning structure substantially on a line extending from an axial center of a rotary tool performing friction stir welding, in the following order:
- an exterior-side joint portion of one side structure and said roof structure, and a supporting device for supporting said joint portion from the interior side;
- and
- performing the friction stir welding using said rotary tool while moving said rotary tool and said supporting device in synchronism along a joint line.
2 more elements
A method for manufacturing a car body, comprising:
- mounting a first component of said car body to a second component thereof, said first component being a side structure of the car body;
- and
- positioning structure of the first component and the second component such that, when friction stir welding an end of the first component to an end of the second component using a rotary tool having an axial center, support structure is provided to support a joint portion between said end of the first component and said end of the second component, said support structure being along said axial center of said rotary tool.
Dependencies are inferred from the claim text.