An apparatus (10) for joining a predetermined geometrical profile shape from a sheet material (SM) includes a positioning assembly (12) including a base member (14) and a frame (16) that is operable to receive the sheet material (SM), to configure the sheet material in a predetermined orientation and to linearly translate the sheet material along a process direction (20). A Z-bar (22) is configured to guide a first longitudinal edge (FE) and second longitudinal edge (SE) of the sheet material (SM) into adjacent alignment along the process direction (20). A welding and forging assembly (60) welds and then forges a seam between the first longitudinal edge (FE) and the second longitudinal edge (SE) of the associated sheet material (SM).

A welded state monitoring system according to an aspect of the present invention is a welded state monitoring system used for plasma shielded electric resistance welding in which electric resistance welding is performed while irradiating a weld zone of a steel sheet with plasma, and is provided with a plasma irradiation device which irradiates the weld zone with plasma, a first image capturing device which captures an image of the weld zone from above and has an image sensor capable of detecting light having a wavelength of 850 nm or more, a first wavelength region limiting device which limits light incident on the first image capturing device to a wavelength region of 850 nm or more, and an image processing device which subjects the image captured by the first image capturing device to image processing and analyzes the welded state of the weld zone thereby being able to analyze the welded state without being affected by the plasma.

This disclosure relates to a method for manufacturing a double pipe, including: a primary roll forming step of forming bending portions on both sides of a strip for an external pipe in a longitudinal direction; a stacking step of stacking a strip for an internal pipe on the strip for the external pipe; a secondary roll forming step of mechanically coupling the strip for the external pipe and the strip for the internal pipe; a forming step of forming the strip for the external pipe and the strip for the internal pipe, mechanically coupled to each other, into a pipe shape; a welding step of bonding the bending portions on both sides of the strip for the external pipe, and the strip for the internal pipe, which are formed into the pipe shape; and a heat treatment step of heat-treating bonded portions of the strip.

An apparatus for manufacturing electric resistance welded pipe, in which two across-opening-facing end parts (2a, 2b) of an open pipe (1) including an opening (2) extending in a running direction are melted by an induction current generated by an induction heating means and joined together at a join portion. The induction heating means includes a first induction coil (3), and the first induction coil (3) is disposed above the opening (2) so as not to encircle the outer circumference of the open pipe (1) and so that a primary current circuit is formed straddling the opening (2).

A method of manufacturing a tubular member for an automotive application that includes providing a flat workpiece of a material; forming at least one lance in the flat workpiece; roll-forming the flat workpiece into a tubular configuration; induction welding a seam of the tubular workpiece after the roll-forming; and trimming the tubular workpiece through the lance after welding the seam.

An apparatus (10) for joining a predetermined geometrical profile shape from a sheet material (SM) includes a positioning assembly (12) including a base member (14) and a frame (16) that is operable to receive the sheet material (SM), to configure the sheet material in a predetermined orientation and to linearly translate the sheet material along a process direction (20). A Z-bar (22) is configured to guide a first longitudinal edge (FE) and second longitudinal edge (SE) of the sheet material (SM) into adjacent alignment along the process direction (20). A welding and forging assembly (60) welds and then forges a seam between the first longitudinal edge (FE) and the second longitudinal edge (SE) of the associated sheet material (SM).

A method of manufacturing a tubular member for an automotive application that includes providing a flat workpiece of a material; forming at least one lance in the flat workpiece; roll-forming the flat workpiece into a tubular configuration; induction welding a seam of the tubular workpiece after the roll-forming; and trimming the tubular workpiece through the lance after welding the seam.

Provided are an electric resistance welded stainless clad steel manufactured by forming a hot-rolled steel strip of clad steel including low-carbon low-alloy steel and stainless steel into a cylindrical shape, and electric resistance welding the edges of the hot-rolled steel strip, characterized in that the flattening characteristic of an electric resistance weld, as-welded, satisfies the formula h/D<0.3, wherein h is the flattened height at fracture (mm) and D is the outer diameter of the pipe (mm), and a method of manufacturing the same.

A method of monitoring a manufacturing status of an electric resistance welded pipe manufactured by shaping a steel strip into a pipe and butt welding both end parts of the steel strip in a width direction along a lengthwise direction includes: arranging an imaging unit in a gas shield nozzle having an opening opposing a region in which both of the end parts of the steel strip in the width direction are butt welded and shielding the region with inert gas by ejecting the inert gas onto the region through the opening, the imaging unit having a visual filed including the region; and determining quality of a butt-welded part based on an image shot by the imaging unit.

A method for producing a camshaft may include: providing at least two metallic components; and welding the at least two components to one another via a combined induction/friction welding method. According to an implementation, one of the at least two components is a camshaft tube and the other of the at least two components is a drive element.