Description
4 Hi Reversing Cold Rolling Mill is a type of cold rolling mill used in metalworking processes to reduce the thickness of metal sheets or strips. The cold rolling mill process include passing a metal strip or sheet back and forth through the rolls multiple times to gradually reduce its thickness and improve its surface finish and mechanical properties.The cold rolling mill includes four rolls arranged in a vertical stack. The four rolls consist of two work rolls (which directly contact the metal) and two backup rolls (which support the work rolls to prevent bending under high pressure). This type of cold rolling mill can pass the metal back and forth through the rolls multiple times. After each pass, the direction of the metal is reversed, allowing for gradual reduction in thickness and improved control over the final dimensions and surface finish. The whole cold rolling process is performed at room temperature or slightly above, as opposed to hot rolling, which occurs at high temperatures. Cold rolling increases the strength and hardness of the metal while improving surface finish and dimensional accuracy. The whole cold rolling mills is composed of uncoiler, hydraulic loading and unloading trolley, five roll pinch straightening machine, inlet and outlet process platform, main cold rolling mill, left and right coilers, combined gearbox, hydraulic AGC and bending roll system, transmission motor, electric control, equipment lubrication and process lubrication system.
Application
4 Hi Reversing Cold Rolling Mill is a versatile and widely used machine in the metalworking industry. Its ability to produce high-quality, thin-gauge metal strips with precise thickness and excellent surface finish makes it suitable for a variety of applications accoss multiple industries:
1. Automotive Industry
Body Panels: Producing thin, high-strength steel and aluminum sheets for car bodies, doors, hoods, and trunk lids.
Structural Components: Manufacturing parts like chassis components, reinforcements, and brackets.
Fuel Tanks and Exhaust Systems: Creating corrosion-resistant and durable materials.
2. Aerospace Industry
Aircraft Skin and Panels: Producing lightweight, high-strength aluminum and titanium sheets for aircraft exteriors.
Structural Components: Manufacturing parts like ribs, spars, and frames that require precise thickness and strength.
3. Construction Industry
Roofing and Cladding: Producing coated steel or aluminum sheets for building exteriors.
Structural Steel: Manufacturing beams, columns, and other structural elements.
HVAC Systems: Creating ductwork and ventilation components from thin metal sheets.
4. Energy Sector
Solar Panels: Producing thin aluminum or steel sheets for solar panel frames and mounting systems.
Wind Turbines: Manufacturing components like turbine blades and housings.
Battery Casings: Creating materials for electric vehicle (EV) battery enclosures.
Technical Specification
4 Hi Reversing Cold Rolling Mill
| Rolling mill model technical parameter |
650type | 750type | 850type |
| material | Plain carbon steel and low alloy steel | Plain carbon steel and low alloy steel | Plain carbon steel and low alloy steel |
| Raw material thickness (mm) | 2.0~3.0 | 2.0~3.0 | 2.0~3.0 |
| Raw material width (mm) | 400~550 | 500~650 | 600~750 |
| Finished product thickness（mm） | 0.18~0.5 | 0.18~0.5 | 0.18~0.5 |
| Rolling pressure（KN） | 5500 | 6500 | 7500 |
| Support roller specifications（mm） | Φ550×600 | Φ650×700 | Φ750×820 |
| Intermediate roller specifications（mm） | ———— | ———— | Φ300/Φ280×820 |
| Work roll specifications（mm） | Φ185/Φ165×650 | Φ205/Φ190×750 | Φ230/Φ205×850 |
| Transmission mode | Work roll transmission | Work roll transmission | Work roll transmission |
| Main motor | DC motor | DC motor | DC motor |
| Reducer | Combined gearbox | Combined gearbox | Combined gearbox |
| Uncoiler (select specifications) | Φ508/Φ610×650 | Φ508/Φ610×750 | Φ610×850 |
| Coiler (select specifications) | Φ508×650 | Φ508×750 | Φ508×850 |
| Rolling speed (m/min) | 180~480 | 240~600 | 240~600 |
| Unwinding tension (KN) | 30 | 35 | 45 |
| Coiling tension (KN) | 10~70 | 10~80 | 10~90 |
| Pressing method | Mechanical/Hydraulic | Mechanical/Hydraulic | Mechanical/Hydraulic |
| DC speed regulation | Siemens | Siemens | Siemens |
| Controller | Siemens | Siemens | Siemens |
Q & A
1. Q: What kinds of experience do you have in producing 4 Hi Reversing Cold Rolling Mill?
A: We have rich experience of producing 4 Hi Reversing Cold Rolling Mills, till now more than 1000 sets 4 Hi Reversing Cold Rolling Mills produced and sold to customers local China and all over the world.
2. Q: What is delivery time of 4 Hi Reversing Cold Rolling Mill?
A: 70 days after contract confirmation.
3. Q: What is your machine speed?
A: Production speed is depending on customer’s requirement, accordingly to customer’s speed requirement , and invest budget, we can design the cold rolling mill speed maximum 1500m/min.
4. Q: What is your after-sales service system?
A: We will send engineer to customer’s factory for machine installation and commissioning, if customer require. We provide whole life service, If there will be any quality problems caused by non-human factors, we will handle it immediately for you and we will be ready for you 7X24H. One purchase, lifetime care for you.
Machine Photo
