Friction stir welding method and structure body
AssigneeHitachi, Ltd.
InventorsKinya Aota, Tsuyoshi Takenaka, Yasuo Ishimaru
Life of this patent
Estimating the term…
Abstract
This invention provides a configuration of a joint that allows a satisfactory welded joint to be formed with reduced deformation of the joint region when two-face structures (panels) are friction-welded end to end. The panels 31, 32 each have two substantially parallel plates 33, 34 and a third member 35 connecting the two plates 33, 34. The end portions of the plates 33, 34 of one panel 32 are friction-welded to the end portions of the plates 33, 34 of the other panel 32. At least one of the panels has a plate 36 at its end for connecting the plates 33 and 34 and has a rigidity to support a pressing force produced during the friction welding.
Claims8
A manufacturing method of a structure body, comprising:
- under a condition where a face of one side of respective first and second plates at an abutted portion of an end portion of a first plate and an end portion of a second plate is supported by a backing plate, inserting a rotary tool into said abutted portion from only a face of another side opposite said one side, said abutted portion including a raised portion extending toward said rotary tool, said rotary tool being inserted into said raised portion,
- carrying out a friction stir welding to said abutted portion, said friction stir welding being carried out substantially to form a flat surface at said one side of said abutted portion, and
- manufacturing a structure by positioning said flat surface of one side which has been obtained according to the friction stir welding at an outer face of the structure body.
A manufacturing method of a vehicle, comprising:
- under a condition where respective faces of one side of first and second plates of an abutted portion of an end portion of the first plate and an end portion of the second plate are supported by a backing plate, inserting a rotary tool into said abutted portion from only a face of another side of the first and second plates opposite the one side, said abutted portion including a raised portion extending toward said rotary tool, said rotary tool being inserted into said raised portion,
- carrying out a friction stir welding to said abutted portion, so as to form a substantially flat surface at said one side of said abutted portion, and
- manufacturing the vehicle by positioning said face of said one side of a structure which has been obtained according to the friction stir welding at an outer face of the vehicle.
A structure body comprising:
- a first plate and a second plate welded to each other from one side of a thickness direction of said first plate and said second plate by a friction stir welding,
- a face of a welding portion formed by the friction stir welding, of an opposite side, to said one side, of said first plate and said second plate, being substantially flat, and
- said face of said opposite side being an outer face of the structure body.
A vehicle comprising:
- a first plate and a second plate welded together by a friction stir welding from one side of a thickness direction of said first plate and said second plate,
- a face of a welding portion of the friction stir welding of an opposite side, to said one side, of said first plate and said second plate being substantially flat, and
- said face of said opposite side being an outer face of the vehicle.
Dependencies are inferred from the claim text.