A dissimilar-material joined body is obtained by fusion joining a steel material and a stud-equipped aluminum member obtained by attaching a steel stud member to an aluminum material. The stud member includes a head portion and a shaft portion. The shaft portion penetrates the aluminum material in a plate thickness direction, protrudes from the aluminum material, and is formed with, at a tip end of the protruding shaft portion. An expanded diameter portion expands radially outward. A back side surface of the head portion that faces the aluminum material is clinched to the aluminum material. The head portion and the steel material are fusion welded to each other with a gap having a desired interval formed between the aluminum material and the steel material.

A securing system, such as a welding system, includes a robot configured to transfer a part to a home position. A securing station has a frame and a gun supported on the frame. The gun includes first and second members movable relative to one another, which are first and second weld gun electrodes, for example. The gun is configured to secure a component to the part in a securing position during a securing operation. A float assembly interconnects the gun to the frame and is configured to permit the gun to glide relative to the welding frame between the home position and the securing position. A homing assembly includes a homing guide configured to release the welding gun from the home position during the securing operation, such as resistance welding fasteners to sheet metal workpieces.

A light module projects multiple light beams onto an installation surface to form multiple light indicia spaced apart in a pattern on the installation surface, with the light indicia identifying installation locations on the installation surface where construction mounts are then installed. The light module includes a light emitter that projects a source light beam and a diffractor that splits the source light beam into the multiple light beams. The light module is adjustably mounted to and movable with a handheld tool used to install the construction mounts. The light module is adjustably mounted to a static-use support.

A method for joining a first component to a second component includes providing a first component with a first joining part receiving section and creating a joining part on and/or in the first joining part receiving section via a generative method. The method also includes providing a second component with a second joining part receiving section, and joining the joining part to the second joining part receiving section of the second component.