Comprehensive experiment table for measuring normal and tangential contact rigidity of mechanical junction surface

The invention relates to a comprehensive experiment table for measuring normal and tangential contact rigidity of a mechanical junction surface, wherein upper and lower support plates are connected into a whole by a stand column, a jack is fixed in the lower support plate, a pressure sensor and a lower test piece are arranged on the jack, an upper test piece is arranged right above the lower test piece, a lower tangential rigidity test pad is clung to two side faces of the upper test piece and the lower test piece and is connected by bolts and nuts, a bolt pretightening force measuring sensor is lined under a bolt head, an eddy current sensor is fixed on two beams extending forwards and backwards of the lower test piece and just faces to two beams extending forwards and backwards of the upper test piece, an adjusting screw is screwed into a screw guide sleeve by virtue of thread, the upper test piece is embedded into a test piece fixing sleeve, a circular arc surface is formed above the upper test piece, a surface corresponding to the circular arc surface, of the test piece fixing sleeve, is a plane, and by changing the assembly relationship of test pieces, the normal contact rigidity and the tangential contact rigidity of the test piece are realized in the same device, the equipment utilization rate is improved, the cost is saved, and the testing efficiency is improved.