Five-axis tool nose following function precision measuring device and method for heavy floor type boring and milling machine

The invention relates to a five-axis tool nose following function precision measuring device and method for a heavy floor type boring and milling machine. The problems that in an existing measuring method, a measuring tool needs to be adjusted again when the measuring direction is changed, the stroke of a milling head is not complete due to interference, and numerical value fluctuation conditions in the X direction, the Y direction and the Z direction cannot be investigated at the same time are mainly solved. The device is characterized in that the front end of a main body (4) is connected with a measuring ball cup (5), lever meters (2) in X, Y and Z directions are respectively fixed on the outer surface of the main body (4), and measuring probes of the lever meters (2) are respectively positioned at corresponding positions on the measuring ball cup (5); and the front end of the measuring ball cup (5) is in contact with the ball head detection rod (1) through a conical surface. The dial gauge of the measuring