A New Electrohydraulic Hybrid Energy-Saving System Used on the Reversible Rolling Mills

Table 2

Description of speed and torque of one pass of the reversible rolling mills.

Stages	Operating mode	Speed	Speed description	Torque	Value
0 (0-t0)	Idling constant speed period	n0	The speed n0 does not change	MD0	Mkon
1 (t0-t1)	Idling acceleration period		ny is the rotation speed of the bite	MD1	Mkon + Mdon
2 (t1-t2)	Accelerated rolling period		is the speed of stable operation	MD2	Mj + Mdon
3 (t2-t3)	Constant speed rolling period		The rotational speed remains unchanged	MD3	Mj
4 (t3-t4)	Slow rolling period		np is the rotation speed when the rolled piece is thrown out	MD4	Mj − Mdon
5 (t4-t5)	Idling deceleration period		The rotation speed is reduced from np to 0	MD5	Mkon − Mdon