Friction element welding method
AssigneeJfe Steel Corporation
InventorsNaoaki MUNEMURA, Koichi TANIGUCHI
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Abstract
A friction element welding method of joining a sheet assembly that includes two or more stacked metal sheets, the method including: bringing a lower part of an element into contact with a top surface of a lowermost metal sheet of the two or more stacked metal sheets arranged at a bottom of the sheet assembly; removing an oxide film on the top surface of the lowermost metal sheet with the element; and joining the sheet assembly by pressing the element into the sheet assembly while rotating the element after removing the oxide film.
Claims8
A friction element welding method of joining a sheet assembly that includes two or more stacked metal sheets, the method comprising:
- bringing a lower part of an element into contact with a top surface of a lowermost metal sheet of the two or more stacked metal sheets arranged at a bottom of the sheet assembly;
- removing an oxide film, film on the top surface of the lowermost metal sheet with the element, wherein the element used when removing the oxide film is structured
- such that a radius of curvature of a tip of the element satisfies:
- (
- -
- 0.017
- ×
- D
- +
- 0.13
- )
- ×
- (
- P
- ×
- R
- /
- TS
- )
- ≤
- r
- ≤
- 400
- -
- D
-
- and
-
- r
- ≥
- D
- /
- 2
-
- when
- 5.
- >
- D
- ≥
- 3.
- ,
- (
- -
- 0.0042
- ×
- D
- +
- 0.071
- )
- ×
- (
- P
- ×
- R
- /
- TS
- )
- ≤
- r
- ≤
- 400
- -
- D
-
- and
-
- r
- ≥
- D
- /
- 2
-
- when
- 7.
- >
- D
- ≥
- 5.
- ,
- and
- (
- -
- 0.00042
- ×
- D
- +
- 0.045
- )
- ×
- (
- P
- ×
- R
- /
- TS
- )
- ≤
- r
- ≤
- 400
- -
- D
-
- and
-
- r
- ≥
- D
- /
- 2
-
- when
-
- D
- ≥
- 7.
- ,
- wherein D is an element diameter (mm) of the element, r is the radius of curvature (mm) of the tip of the element, P is a pressurizing force (kN) of the element, R is a rotational speed (rpm) of the element, and TS is a tensile strength (MPa) of the lowermost metal sheet;
- and
- joining the sheet assembly by pressing the element into the sheet assembly while rotating the element after removing the oxide film.
Dependencies are inferred from the claim text.