| 摘要 |
A spot welding apparatus for welding together sheet metal components such as motor vehicle bodies comprises: (a) a welding station, with an automatic programmable welder; (b) a conveyor line carrying loosely assembled component structures to the weld station; (c) pairs of locating gates at the weld station; each having specific clamping arrangements suitable for clamping in a welding position, a particular type of structure, the gates movable between an operative and a non operative rest position; (d) a number of auxiliary fixtures movable along an independent conveyor line, for coupling to a locating gate, each having clamping units for engaging different parts of different versions of a particular body structure. The locating gates (4,5) are mounted to move longitudinally along the welding line by means of wheels (7) rolling along tracks and support structure (8), with the auxiliary fixtures (4A,5A) longitudinally movable parallel to the locating gates (4,5) on a separate track (19) positioned above the production conveyor line. The auxiliary fixtures (4A,5A) are raised and lowered into position on the locating gates (4,5) by means of a pantograph type lifting arrangement (20), the upper support (21) of which is anchored to the main frame (11) of the weld station. The auxiliary fixtures then coupled to the locating gates by means of plug and socket couplings, or other suitable method. The two gates (4,5) can be moved from an operating position to a non-operating position transverse to the production line by pivoting the gate (4,5) around the axes of support shafts (17) at the base of the gates (4,5). |
