A method of joining a multiple member work-piece includes providing a first steel work-piece having a first thickness and a second steel work-piece having a second thickness. The first thickness is at least twice the second thickness. A third material is disposed in contact with the second steel work-piece. For example, the third material may be in the form of a rivet, a plurality of pins, or a coating material. The method includes resistance welding the first and second work-pieces together. A bonded assembly includes the first and second steel members and the third material being bonded together, where the thickness of the first member is at least twice the thickness of the second member.

A device and method for monitoring and correcting the position and orientation of an operating device (2) with respect to a piece (P). A measuring device (5) including a plurality of sensors (505) connected to the operating device is used to measure through contactless technology the distances of the sensors from a surface (π) of the piece along respective directions (l, r, s) having given orientations. The sensor measurements are compared to predetermined desired values and the position of the operating device (2) is selectively changed to maintain a desired positional relationship between a main operative axis (X1) of the operative device and operation axis (X2) defined by the surface of the piece.

A welding electrode may comprise a welding electrode body and a welding electrode cap that is connected or connectable to the welding electrode body for making contact between the welding electrode and a component for producing a welded connection. The problem of achieving an efficient heating of the sandwich sheet to be welded in a compact layout with the fewest possible modifications of the welding electrodes used heretofore is solved in that an electrically conductive resistance element integrated, or which can be integrated, in the welding electrode and which is connected or connectable in an electrically-conductive manner to the welding electrode body and the welding electrode cap is provided for the heating of the component. Furthermore, a method and a device with the welding electrode and a use are disclosed.

A joining structure includes a first member, a second member of a material different from that of the first member, and a separation mechanism provided between the first member and the second member and that separates the first member and the second member from each other, wherein a resin is filled into the space between the edge of at least one member among the first member and the second member, and the other member.

A method of resistance welding a component to a sandwich sheet, which includes a thermoplastic layer disposed between two metallic outer layers, may involve heating a region of the sandwich sheet to be welded such that the thermoplastic layer softens, displacing the thermoplastic layer from the region by pressing the outer layers together, and welding the outer layers to the component by an electrical current flow for welding in a first circuit. The first circuit may include a first power source via a first welding electrode arranged at a side of the sandwich sheet and a second welding electrode arranged at a side of the component. This method is easy to run and achieves short cycle times due at least in part to the region being heated by a current flow for preheating in a second circuit that comprises a second power source and an electrical conductor that is arranged between the first welding electrode and the sandwich sheet.”

A plate thickness test mechanism includes a detection section that detects an abnormality when a plate thickness is thinner than a desired plate thickness by a predetermined amount or more or thicker than the desired plate thickness by the predetermined amount or more, a determination section that determines whether or not the detection section functions normally, and a plate-shaped test jig that has a first plate portion having a plate thickness thinner than a predetermined specific plate thickness, and a second plate portion having a plate thickness thicker than the specific plate thickness. The determination section determines whether or not a plate thickness test is normally performed on the basis of a detection result of the detection section obtained when the detection section tests the plate thicknesses of the first and second plate portions by taking the desired plate thickness as the specific plate thickness.

A resistance welding machine, particularly suited to carry out repairs on metallic bodies, includes a machine body housing a rechargeable electric battery for supplying the electrical energy that is necessary for the welding cycle, a rod carrying the welding electrode, and a rod carrying the earth electrode. Both of the earth rod and the welding rod are electrically connected to the battery, which is the only source of electrical energy for the resistance welding machine.

A resistance welding machine, particularly suited to carry out repairs on metallic bodies, includes a machine body housing a rechargeable electric battery for supplying the electrical energy that is necessary for the welding cycle, a rod carrying the welding electrode, and a rod carrying the earth electrode. Both of the earth rod and the welding rod are electrically connected to the battery, which is the only source of electrical energy for the resistance welding machine.

A component loading-welding system for welding a component panel to a vehicle body panel includes a rotation portion body having first and second opposing sides. The first opposing side is coupled to a robot arm. A picking device is installed in the rotation portion body and is configured to hold and release the component panel. A vehicle body pressurizing tip is installed in the rotation portion body. A pressurizing portion body is rotatably installed at the second opposing side of the rotation portion body. A pin clamp is installed in the pressurizing portion body and is configured to clamp the component panel. A component pressurizing tip is installed in the pressurizing portion body and is configured to apply pressure to the component panel. A multi point projection welding method is also disclosed.

A component loading-welding system for welding a component panel to a vehicle body panel includes a rotation portion body having first and second opposing sides. The first opposing side is coupled to a robot arm. A picking device is installed in the rotation portion body and is configured to hold and release the component panel. A vehicle body pressurizing tip is installed in the rotation portion body. A pressurizing portion body is rotatably installed at the second opposing side of the rotation portion body. A pin clamp is installed in the pressurizing portion body and is configured to clamp the component panel. A component pressurizing tip is installed in the pressurizing portion body and is configured to apply pressure to the component panel. A multi point projection welding method is also disclosed.