| 摘要 |
A locating and locking unit for sheet metal parts which are to be assembled by electric spot-welding on a motor-vehicle body, comprising a base platform, for receiving the trolley of a positioning frame equipped with locating and locking devices for the parts to be welded. The base platform can be rotated between a non-operative horizontal position and an inclined position in which the positioning frame can engage the parts to be welded in a welding station along the assembly line. Locating elements are provided for defining the precise position of the positioning frame along two mutually orthogonal axes in a plane that is perpendicular to the axis of the line and along an axis parallel to the line.
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