The Cold Rolling Mill

The Cold Rolling Mill

In the article How Many Types of Rolling mill, we know that rolling is divided into two types that are hot rolling and cold rolling according to the different temperatures when metal is rolled. If the temperature is above its recrystallization temperature, then this kind of process is known as hot rolling. If the temperature is below its recrystallization temperature when mentally rolled, the process is called cold rolling.

While this article mainly talks about cold rolling. Cold rolling is fulfilled by making steel strips through plenty of tandem rolling mill stands. And each one of the stands has vertically stacked rolls that are powered by a huge motor to impart high compressive stresses into the strip. While hot rolling, pickled coils fed into the cold rolling mill from an entry-end reel and progressively reduced in thickness in each stand, to achieve the final desired thickness, as the strip exits the last stand. After the last stand, the strip recoiled. At this step, the strip is highly cold and not very useful for most applications. It needs to be annealed to soften the steel and make it more formable. 

Another method of cold reduction needs to use of a reversing mill. In this process, the strip is passed back and forth between mandrels on each side of a single or two-stand mill. The strip is reduced in thickness on each pass until the final required thickness is attained. The typical percent cold reduction ranges from 60 to 80 percent; such reducing a hot rolled strip of 0.100-inch thick to a 0.030-inch thickness results in 70 percent cold reduction.

What Is Cold Rolling Mill ?

What Is Cold Rolling Mill ?

What is cold rolling? I believe people who will be very interesting in "What is Cold Rolling"?  

If the temperature is below its recrystallization temperature when mental rolled, the process is called cold rolling. 

Cold rolling is fulfilled by making steel strip through plenty of tandem rolling mill stands. And each one of stands has vertically stacked rolls that are powered by a huge motor to impart high compressing stresses into the strip. 

Cold-rolling mills can produce various products like the smooth tin plates flowing like water, shiny galvanized plates glittering like mirror and other colorful coated sheets. They can then be pressed into cans or applied on industrial machines and household appliances or even just for decoration. 

What rolling mills do are not just limited to those plates. Rods, bars, wires, rails... You name it. All these productions can be easily achieved just like the plates with rollers in different shapes. 

With the emergence of new technologies in this field, it’s not hard for us to believe that the rolling mills in the future will be smarter and much more powerful. The application of those new technologies will lead us to cost reduction, quality insurance and the improvement of competitive abilities. 

Please contact stella@hanrm.com for a quotation.
And free send inquiry to us.
Email: stella@hanrm.com   stellarollingmill@gmail.com
Whatsapp/Wechat:+8615877652925

Used 4 Hi Rolling Mill (393 mm width 4.0 mm-1.2 mm ) thickness for SALE

Used 4 Hi Rolling Mill (393 mm width 4.0 mm-1.2 mm ) thickness for SALE

4HI ROLLING MILL For Sale
Mill Type 4-High rolling Mill
Original Manufacturer United Engineering
Mill Top Speed 1330 Fpm (405 Mpm)
Strip Tension (Maximum) 5875 Lbs (2670 kG) to top speed
Strip Thickness
Maximum entry 0.160” (4 mm)
Minimum Finish 0.050” (1.2 mm)
Strip Width (Maximum) 15.5” (393 mm)
Coil Data – ID 16” OD 57”
Weight 7000 lbs. (3180 kG)

Mill Data 
Work Rolls 6” (152 mm) diameter x 17” (432 mm) barrel length
BUR’s 26” (660 mm) diameter x 17” (432 mm)Roll Face
Hydraulic Screwdown Retrofitted (1986)
Automatic Gage Control System by I2S
Solid Block Winders, Payoff Stands, Coil Car, Overhead Hold Down Arm
HP Main Mill Drive 500 Hp (373 kW)
Winders (entry and exit) 250 Hp (186 kW)
Oil Filtration System
Spare Rolls, Bearings
Computerized PLC Touch Screen Command Controls

Free send inquiry to stella@hanrm.com if any needs.

Whatsapp/Wechat:+8615877652925

Website:  https://www.hanrm.com

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What Should Be Paid Attention to After the Cold Rolling Mill is Finished?

What Should Be Paid Attention to After the Cold Rolling Mill is Finished?

In general, when the cold rolling mill completes the work task, we also need to shut down according to the specified operation requirements. It is not only necessary to carry out the closing treatment in a certain order, but also need to carry out aftermath treatment to prepare for the next work. So, for users, what should be paid attention to when the cold rolling mill is finished?

First of all, when the task is finished, we need to shut down the equipment first. However, at the time of shutdown, there are sequence requirements. We need to shut down the cold rolling mill in turn according to the requirements, starting from the high-pressure system, followed by the low-pressure system, oil smoke exhaust system, rolling oil system, and DC drive system. In this process, it should also be noted that the filtering work also needs to be stopped.

We know that when we use the cold rolling mill to roll metal, there will be a great force in the process of processing, so after a long time of use, there may be some deformation. To solve this problem, let's see how the experts answer it.

To answer this question, we need to consider its structure and design. In order to ensure the performance of the cold rolling mill, we need to fully consider this problem when we design, so it involves its rigidity coefficient.

In order to ensure that the rigidity coefficient meets the requirements of use, we also need to analyze the main characteristics of the cold rolling mill in operation. Considering the important role of supporting roller, we know that the working load of the roller bearing is relatively large and it will constantly change during the working period, so the friction coefficient of the bearing must be small enough, with sufficient strength and rigidity. Therefore, a suitable roller bearing should be selected.

In addition to the above work, after the cold rolling mill is shut down, we need to clean up the working environment and place the remaining materials in the specified position, which is also ready for the next production work.


Please contact stella@hanrm.com for a quotation.
And free send inquiry to us.
Email: stella@hanrm.com   stellarollingmill@gmail.com
Whatsapp/Wechat:+8615877652925

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Factors of Slowness of Cold Rolling Mill

Factors of Slowness of Cold Rolling Mill

For the manufacturing of rolling mills, no matter what kind of machinery and equipment, the speed of production is very important, so the speed of cold rolling mills is also the same, if there is no speed in the entire production process Then, the production of the product will definitely lag behind, which will have a very serious impact on the enterprise, mainly including economic impact. What factors will directly affect the low speed of the cold rolling mill?


The first is the influence of the material: because there is friction between the rolled material and the work roll in the cold rolling mill, then the speed will also have a corresponding effect, so work in such situations At the time, the amount of lubricating oil will also increase, and it will cause changes in the mode of lubricating oil.


Second, the impact of the cold rolling mill itself: if the cold rolling mill is adjusted faster in mechanical rolling speed, then a larger number of roll necks will appear in the bearing, which will also seriously affect The movement of the roll.

In the process of rolling mill operation, the cooling water will directly cause the screw nut to rust and increase its friction, mainly because the working environment is relatively poor, reducing the service life of the screw nut. Shortening, in order to effectively ensure the transmission accuracy of the screw nut in the reverse direction, and the processing accuracy of the screw nut, the best way is to improve the cooling and lubrication of the rolling mill and add a dust cover to the screw nut. This can achieve the effect of waterproof and breathable.

Please contact stella@hanrm.com for a quotation.
And free send inquiry to us.
Email: stella@hanrm.com   stellarollingmill@gmail.com
Whatsapp/Wechat:+8615877652925

More News You May Interesting:

Sendzimir Mill Features

New Process Sendzimir Roll Features

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Morgan Wire Rod Mill

Why does the Steel Bar Bend after being Cut by Flying Shear?

Headless Welding Rolling Process

Bar Rolling Mills Water Cooling Technology

How to Improve the Thermal Efficiency of the Reheating Furnaces？

Causes of Surface Cracks in High-Speed Wire Rod Rolling Mill

What is Slit Rolling?

Failure Analysis of Cold Mill Roll

Causes and Solution of Steel Piling-up in High-speed Wire Rod Rolling Mills?

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What are the Different Types of Rolling Mills?

What are the Different Types of Rolling Mills?

The rolling mill is mainly a kind of equipment for rolling metals. It can not only arrange according to the parts rolls but also differentiate according to the main arrangement of the stand. The main product classifications are as follows:

1. First, two-roll mill, the biggest feature of this mill is very simple in structure and has a wide range of uses. It can be divided into reversible or irreversible type. Reversible type mainly includes blooming mill, plate mill, and rail beam mill. The irreversible rolling mill can be divided into laminated thin plate rolling mill, strip rolling mill, continuous slab rolling mill and thin plate rolling mill. If classified according to this form, there are four-roll mill, six-roll mill, three-roll mill, and five-roll mill.

2. Planetary rolling mill mainly uses two large-diameter supporting rolls to drive two sets of planetary roll systems. Whether flat ingots or slabs, they can be directly rolled into thin strips at one time. If continuous caster can be directly used in the front process and temper mill is used in the back process, the production process of hot strip steel can be effectively simplified. 

3. Universal rolling mill is mainly composed of vertical roll and flat roll, and all its accessories are basically driven by power, so it can be used in slab or flat steel rolling for many times.

Cold Rolling Mill

Hani Tech can be your preferred supplier for Cold Rolling Mills starting from planning, engineering, implementation and modernization of your plant.

With most modern infrastructure and more than 100 man-years of process knowledge, Hani Tech is offering efficient & modern Cold Rolling Mills that produce ultra-thin gauges at tightest tolerance with high productivity and advanced features.

As specialists Cold Rolling Mills in the field, Hani Tech are invited to resolve the issues in existing mills. We have successfully revamped old mills for quality, quantity and equipment uptime enhancement.

Cold Rolling Mill

MILL TYPES OFFERED FOR FERROUS & NON-FERROUS PRODUCTS:

• Single & Twin stand 4/6 HI Reversing Mills
• Skin Pass Mills

Our setups have the highest range of tolerances for strips productions. Our designs are operator-friendly and versatile in operations. Everything is designed to directly benefit you. And there’s a wide range to choose from:

• 100 to 1400 mm strip widths
• 180 to 1200 mm mill speeds
• Up to 0.10 mm output thickness
• Up to 250,000 tons per annum production capacity

WE PROVIDE THESE MILLS:

• 6 HI Reversible Cold Rolling mills
• 4 HI Reversible Cold Rolling mills
• Skin Pass Mills

Cold Rolling Mill

We have worked on countless projects all over the world. We have got mechanical, electrical, automation, and hydraulics departments, all under one roof. This gives us an advantage of finishing our projects on time.

We have a team of highly trained engineers ready to support you round the clock. We are acknowledged for the best after-sales services in the industry. 

Our services include:

• Induction and synchronous motors and drives
• Production and project management
• Life cycle services
• Optimization and consultation
• In-house tests
• Erection supervision and commissioning

Our erection supervision and commissioning team is highly trained and have huge amounts of experience. We assist customers at every step of the process.

With Hani Tech, high levels of productivity and cost-efficiency are guaranteed. We have a customer-centric company culture. Everything we do, we do with giving preference to you, our valuable client.

For more information about cold rolling mills, contact stella@hanrm.com.