Copper Bronze Brass Sheet Strip Cold Rolling Mills

Copper (Bronze, Brass) Strip Rolling Process:

• Hot rolling from billet down to around 15-20mm thickness,
• copper cold rolling mill will be first rough rolling mill to get around 3mm sheet,
• Intermediate rolling mill from 3mm to 1mm
• then fine rolling mill makes copper strip 0.2-0.3mm and even copper foils 0.03-0.05mm

Hot rolling and rough cold rolling steps usually 2Hi two rollers mill, reverse reduce thickness.

Copper strip Reversible Cold rolling Mill can be 4-Hi or 6-Hi to realize rough rolling, fine rolling and foil rolling copper strips.

Take 16mm input reducing down to 0.5mm as example:
16mm-10mm-7mm-5mm-4mm-3.6mm(annealing)
4mm-2.4mm-1.7mm-1.5mm(annealing),

1.5mm - 0.9mm- 0.65mm - 0.5mm

total 11passes rolling

4Hi Hydraulic Reversible Cold Rolling Mill Specification

Coil strip grade:
Copper (C110/C120/C122/C144),
Yellow Brass (C260/C268/C272),
Red Brass (C230/C220/C210)
Bronzes (C510/C511/C519/C521/C524).

Input coil strip: 12～16× 300～450mm
Output coils: 0.8～1.5× 300～450mm

Thickness reduction per pass: Max 40%δ
Average thickness reduction per pass: 30%
Total thickness reduction per rolling after once annealing:≤90-95%δ
Thickness reduction to interim annealing: ~75%
Tension control precision: ≤5‰, thickness control precision: ≤土0.005mm

Copper Coils:
Max outer diameter:1600 mm
Inner diameter:raw material coils:500mm recoiling ID:508 mm
Max coil weight:8t

Max rolling force:3000 KN
Rolling torque:35 KN.m
Rolling speed:max 250 m/min
Recoiling speed:max 260 m/min
Recoiling force:30 KN

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, li-ion battery, etc.

Copper (Bronze, Brass) and copper Alloy Strips Specification