Device for measuring hole depth and bottom thickness of cylindrical extrusion blank

The utility model discloses a device for measuring the hole depth and the bottom thickness of a cylindrical extrusion blank. The device comprises a supporting plate, a reading rod and a measuring rod, wherein the lower plate surface of the supporting plate is provided with a horizontal connecting groove; the reading rod and the measuring rod are vertically arranged below the supporting plate through the horizontal connecting groove; depth scales are engraved on the side wall of the lower end of the reading rod, and the zero scale of the reading rod is flush with the end portion of the lower end of the measuring rod. The upper portion of the reading rod and the upper portion of the measuring rod are connected with a horizontal connecting groove in the lower plate face of the supporting plate through sliding blocks, and the lower ends of the sliding blocks are fixed to the upper end of the reading rod or the upper end of the measuring rod in a threaded mode through threaded holes. And a guide plate of which the