A method for manufacturing a brake disc includes providing at least one sheet of predefined thickness, blanking a first disc-shaped portion in the at least one sheet adapted to make a first plate of a ventilated braking band, blanking a second disc-shaped portion in the at least one sheet adapted to make a second plate of the ventilated braking band, blanking a third portion in the at least one sheet adapted to make at least one ventilation spacer for the ventilated braking band, drawing the third portion by shaping first and second protrusions, forming opposite first and second recesses adapted to make ventilation channels, connecting the first disc-shaped portion to the first protrusion by discontinuous weld spots, and connecting the second disc-shaped portion to the second protrusion by discontinuous weld spots.

A manufacturing method for a plate comprising channels in which the method includes a step of superposing the two strips, a step of welding the two strips along the weld seams, a step of blocking the zones between the weld seams on one side of the strips, a pressurization step with a compressed fluid, where the zones between the weld seams open out along another side, to expand the strips, and a step of opening the zones blocked during the blocking step. This manufacturing method enables the titanium strips to be welded together and shaped by pressurization.

The arc spot welding method for joining dissimilar materials, in which a first sheet (10) made of an Al-based material or an Mg-based material and a second sheet (20) made of ultra-high tensile steel having a tensile strength of 1180 MPa or more are joined, includes a step of forming a hole in the first sheet (10), a step of overlapping the first sheet (10) and the second sheet (20), a step of inserting a joining auxiliary member (30) made of steel, in which a hollow portion is formed, into the hole of the first sheet (10), and a step of joining the first sheet (10) and the second sheet (20) via the joining auxiliary member (30) using a welding material containing 13 mass % or more of Ni.

The arc spot welding method for joining dissimilar materials, in which a first sheet (10) made of an Al-based material or an Mg-based material and a second sheet (20) made of ultra-high tensile steel having a tensile strength of 1180 MPa or more are joined, includes a step of forming a hole in the first sheet (10), a step of overlapping the first sheet (10) and the second sheet (20), a step of inserting a joining auxiliary member (30) made of steel, in which a hollow portion is formed, into the hole of the first sheet (10), and a step of joining the first sheet (10) and the second sheet (20) via the joining auxiliary member (30) using a welding material containing 13 mass % or more of Ni.

A method for manufacturing a tailored blank press formed product includes a tailor welding step in which a first steel plate and a second steel plate are abutted against each other and welded together at side surfaces thereof to form a blank; a shearing step of shearing the blank or a first intermediate product, which is a processed blank, along a line that crosses a welding line formed in the tailor welding step; and an electric heating step of electrically heating a welded-and-sheared portion of a sheared section of the blank or the first intermediate product, the welded-and-sheared portion being welded in the tailor welding step.

A method for manufacturing a tailored blank press formed product includes a tailor welding step in which a first steel plate and a second steel plate are abutted against each other and welded together at side surfaces thereof to form a blank; a shearing step of shearing the blank or a first intermediate product, which is a processed blank, along a line that crosses a welding line formed in the tailor welding step; and an electric heating step of electrically heating a welded-and-sheared portion of a sheared section of the blank or the first intermediate product, the welded-and-sheared portion being welded in the tailor welding step.

A junction structure includes a first metallic material, a second material different in type from the first metallic material, and a welding wire as a third material similar to the first metallic material. The second material is stacked on the first material. The molten metal of the third metallic material is deposited by arc welding into the through part of the second material so as to form a flanged or tapered bead, so that the first and third metallic materials and the second material are fixed together.

A junction structure includes a first metallic material, a second material different in type from the first metallic material, and a welding wire as a third material similar to the first metallic material. The second material is stacked on the first material. The molten metal of the third metallic material is deposited by arc welding into the through part of the second material so as to form a flanged or tapered bead, so that the first and third metallic materials and the second material are fixed together.

The present invention relates to a method for joining a plated steel sheet, in which at least one of a first steel sheet and a second steel sheet is a plated steel sheet, and the first and second steel sheets overlapped with each other are subjected to an arc spot welding. The method includes press-working the first steel sheet into a desired shape and at the same time forming a linear groove on an overlapping surface with the second steel sheet of the first steel sheet, overlapping the first and second steel sheets, and setting a welding torch with the groove as a target position, and performing the arc spot welding so as to overlap the groove when viewed from a direction perpendicular to the overlapping surface.

The present invention relates to a method for joining a plated steel sheet, in which at least one of a first steel sheet and a second steel sheet is a plated steel sheet, and the first and second steel sheets overlapped with each other are subjected to an arc spot welding. The method includes press-working the first steel sheet into a desired shape and at the same time forming a linear groove on an overlapping surface with the second steel sheet of the first steel sheet, overlapping the first and second steel sheets, and setting a welding torch with the groove as a target position, and performing the arc spot welding so as to overlap the groove when viewed from a direction perpendicular to the overlapping surface.