Detection device for detecting dimensional precision of sheet metal parts

The detection device comprises a vertically arranged detection ruler, a digital display dial plate is sleeved on the detection ruler, and a first clamping jaw and a second clamping jaw are respectively arranged on two sides of the digital display dial plate. An object placing platform is arranged at the bottom of the detection ruler, and a first clamping area is formed by the first clamping jaw and the object placing platform; a third clamping jaw is arranged at the position, close to the top, of the detection ruler, the third clamping jaw is arranged over the second clamping jaw, and a secondclamping amount area is formed by the second clamping jaw and the third clamping jaw. Therefore, the internal and external dimensions of the sheet metal part can be rapidly and comprehensively detected through the first clamping area and the second clamping area without the help of other measuring instruments or auxiliary devices, so that the measurement of the dimension of the sheet metal part is greatly facilitated, an