Copper Cold Mill Line

Introduction

Copper Cold Mill Line,Copper Sheet making is a industrial process of hot cast rolling and cold rolling, Copper(bronze, Brass) and copper alloy Strip plates are widely used in industries of electronics, automobiles, electricity, home appliances, etc.to make parts like electric elements, light holder, battery cap, buttons, seals, etc.

Technical Parameter

Copper (Bronze, Brass) and copper Alloy Strips Specification
Name Sheet spec. Copper, Brass, Bronze Grades
1 Bronze strip 0.08-4.0 mm
x 8-600mm QSn4.0-0.3(C5111/C5100),QSn6.5-0.1(C5191),
QSn8.0-0.3(C5210),QSn10-0.3(C5240)
2 Brass strip 0.1-4.0mm
x 8-600mm H62(C2800),H63(C2720),H65(C2680),H68(C2620),
H70(C2600),H85(C2300),H90(C2200),H96(C2100)
3 Cu-Ni-Zn strip 0.08-4.0 mm
x 8-400mm BZn10-25(C7450),BZn12-24(C7451),BZn15-20(C7541),
BZn18-10(C7350),BZn18-18(C7521),BZn18-26(C7701)
4 Copper 0.1-4.0mm
x 8-600mm T2（C1100）,TU00(C10100), TU1, TU2,
TU3(C10200), TP1(C12000),TP2(C12200)
φ300X600/φ650X580 4-Hi Hydraulic Rough Rolling Mill

Rolling precision

Speed tolerance：

±0.5% set speed in acceleration and deceleration.

±0.1% set speed in stable running

tension tolerance

In stable running, max tension ±1%, min. Tension ±5%

In acceleration or deceleration: max tension ±3%, min. Tension ±10%

Finished thickness tolerance：1.0±0.0080 mm、2.0±0.015 mm、3.0±0.020 mm（97% strip length can meet the tolerance except for the head and tail）

Flatness of finished sheet： ≯80 I

cooling of rolling process: emulsified water

residual oil on sheet surface≤130mg/m2

Lubrication of roller bearings: by oil gas

Time of backup rollers fast change: no more than 60minutes, time for work roller change: no more than 15minutes.

Work process

Coil loading car→Uncoiler→double pinch roller and three roller straightener→recoiler(big mandrel, small mandrel)→Entry processing table →4-Hi rolling mill→Exit processing table→Right Recoiler(big mandrel, small mandrel)→Coil Discharging car

Configuration

DC motors are controlled by 6RA80 series digital DC driver,the whole line is controlled by S7 PLC.

Hydraulic press-down of rolling mill: Automatic Gauge Control. The hydraulic AGC system is controlled PLC, with constant roller gap, constant rolling force, thickness precontrol, thickness monitor, etc functions.

Deviation adjusting of press-down

With front recoiler to realize reversible rolling.

Safety protection such as overload protection, emergency stop in electric control system.

Automatic coiling tension setting and automatic constant tension control.

Drive backup rollers, universal joints as coupling

Oil gas lubrication for bearing seats of rollers, press-down and universal joints

Automatic PLC control for whole process such as interlink of continuous steps and fault alarms.

The rolling mill has functions: pre-setting of rolling process parameters, the inspection，display and alarm of processing parameters and machine critical parameters.