4 Roller Reversible Cold Rolling Mill Machinery For Steel Strip

1. Rolling conditions

a. Material: Stainless steel, Optimal steel, Low alloy steel belt

b. Strip specifications: ≤ 4.0mm, width≤420mm, coil inside diameter 508mm, the maximum weight 5000 kg

c. Finished specification: ≥0.50×420, coil inside diameter 508mm, maximum outside diameter φ1800mm

d. Rolling dynamic: p≤400T

e. Rolling speed: ≤150m/min

2. Equipment component

Main frame specifications: φ185/φ460×500 Four rollers reversible cold rolling mills.

Transmission mode: working roller transmission.

Press device:

a. press motor: motor, 15KW×2, 6 class

b. High-speed worm gear box: WS210, I=41, center distance A=210mm

c. Low-speed worm gear box: two envelope turbine worm, center distance A=315mm, Mn=14.5mm, I=40

d. press screw: S160×6, pressure speed: 0.058mm/s

e. pressure box use steel castings

Frame system:

a. Two-piece closed frame, frame surface section 250×350, material: ZG35

b. Window board: overall processing, artificial brush shovel

Roll part:

a. Work roller diameter × width of roller surface: φ185×500, Material: 9Cr2Mo, Bearings: compound tiles, needle bearing

b. Support roller diameter× roller surface width: φ460×470mm, Material: 9Cr2Mo, Bearings: FC rolling machine special bearing

c. Lubrication way of bearing: Grease lubrication

d. Roller changed way: hydraulic change backup roller

Main drive components

a. Main motor model: Z4-315-32 series DC motor, power P=355KW, 1000/1600r/min, 440V, 864A

b. Main reducer ZLY450, I=6.3

c. Herringbone gear box: center distance A = 230mm, Mn = 10mm

d. Reducer/ two joint box lubrication methods: thin oil splash lubricating

e. Transmission shaft type: metallurgy use universal joint cross shaft SWC200

f. Base: split-type steel structure welded base

3. Tension coiler machine: hydraulic Four pyramid coiler machine (two sets)

a. Reel diameter: φ508×500

b. Expansion/ contraction capacity: ≥30mm (φ490-φ520)

c. Hydraulic pusher, hydraulic car, hydraulic expansion/ contraction.

d. The maximum coil weight: ≤5000kg

e. Main Motor: Z4-250-42 series DC Motor, P=160KW, 1000/2000r/min, 401A

f. Reducer: ZQ750, I=15.75

g. Coiling tension: T≤3800KG

4. Thickness gauge:QNT-II ray thickness gauge (user self-provided)

5. Electric control system

        The electrical control ues Eurotherm company 590 system. The relay control system use PLC, expansion joint adjustment. Coiler changes with the constant rise force control and tracking, match operation box, with current, speed, expansion, thickness etc, digital display, if broken it has protection function.

        Match with Siemens electric.

Roller and hydraulic station