Crankshaft connecting rod neck follow-up grinding force dynamic measurement method and device

The invention provides a crankshaft connecting rod neck follow-up grinding force dynamic measurement method and device. The crankshaft connecting rod neck follow-up grinding force dynamic measurement device comprises a crankshaft, a sand wheel, a rotary measuring cell and a measuring unit, wherein a main shaft neck of one end of the crankshaft is connected with a sand wheel head frame, and a main shaft neck of the other end of the crankshaft is connected with a sand wheel tail frame; the sand wheel makes contact with a crankshaft connecting rod neck of the crankshaft; the rotary measuring cell is arranged on one of the main shaft necks of the crankshaft; and the measuring unit is connected with the rotary measuring cell. The crankshaft connecting rod neck follow-up grinding force dynamic measurement method and device have the following beneficial effects that the dynamic change of grinding force in the crankshaft connecting rod neck planetary motion process is converted into grinding force applied to the main shaft necks by building a mathematical model of grinding force in the crankshaft connecting rod neck follow-up grinding process, the grinding force is collected through a series of measuring equipment, and finally the crankshaft follow-up grinding force dynamic measurement method is formed; spatial position dynamic, continuous and precise measuring can be conducted on normal and tangential components of the grinding force at a grinding point of the connecting rod neck; and the method is suitable for engineering practice and solving the dynamic measuring problem of the crankshaft follow-up grinding force.