Device and method for detecting outer contour of sheet metal part

The invention belongs to the technical field of aviation aircraft aluminum alloy sheet metal machining, and relates to a device and method for detecting the outer contour of a sheet metal part, and the device comprises a vehicle body, a stand column, a support, a shaping needle box, a tightener, a laser positioner and a shaping needle. Through the arrangement of the plurality of shape taking needles, a special-shaped component can be sampled, measurement is facilitated, and subsequent operation of trimming typical parts is facilitated; through the arrangement of the shape taking box, the stability of the shape taking needle can be ensured; and through the arrangement of the locking mechanism, after the special-shaped component is shaped, the position of the shape taking needle can be fixed, and follow-up measurement is guaranteed. And through the arrangement of the guide rail and the sliding seat, the shape taking needle can conveniently move transversely and vertically when taking the shape of a typical part