Driving Torque Model and Accuracy Test of Multilink High-Speed Punch

Table 3

The influence of the change of the crank radius.

	Crank radius/mm
	10	15	20	25	30
The torque of overcoming the inertia force/N·m.	1411.3	1832.9	2395.4	3096.3	3952.7
The torque of overcoming the stamping force/N·m.	2115.4	1943.5	1675.2	1311.7	1091.1
The angle of nominal force stroke/°	145	141	134	126	114