Hole depth and bottom thickness measuring device for cylindrical extrusion blank

The invention discloses a hole depth and bottom thickness measuring device for a cylindrical extrusion blank. The hole depth and bottom thickness measuring 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 mounted below the supporting plate through the horizontal connecting groove; the side wall of the lower end of the reading rod is in threaded connection with an adjusting sleeve, and depth scales are engraved on the side wall of the adjusting sleeve; the side wall of the measuring rod is sleeved with a guide block, and the side wall of the guide block is a conical surface which converges downwards. 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