The History Development Of Rolling Mill

The History Development Of Rolling Mill

Hot and cold rolling mill between two or more rolls has been in existence since long before the industrial revolution. As a matter of fact, Leonardo da Vinci was credited for the metalworking mill prior to his death in 1519.

When most people think of a rolling mill, they visualize sizable machinery in ferrous (iron, carbon steel, and stainless steels) and non-ferrous (copper, brass, lead, etc.) integrated or electric arc furnace (EAF) steel mill of today, to small manually cranked rolling devices used at jewelers to reduce the thickness of the precious metal or impart a pattern on the surface of the metal to be fabricated into a chain or ring.

Rolling mills have many functions. They can be used to reduce the thickness of material quite accurately (+/-.0001”) or compress the material to create a uniform density throughout the strip or import a surface finish on one or both sides of the material, just to name the most common methods.                    

Rolling mills are not standard machine tools, nor are they built for stock. They are designed and built to order to specifically accomplish an end product or process.

At one point during the industrial revolution in America, the United States led the world in hot and cold rolling, plate mills, slabbing mills, and blooming mills. Companies such as Mesta, United, Blaw-Knox, Lewis, Continental, and Bliss were attributed to building some of the largest rolling mills in the world before World War II.

Many of these old mills are still running today as a result of upgraded electrical and hydraulic systems, including hydraulic screwdowns, hydraulic roll bends, and tension control.

Please contact stella@hanrm.com for a quotation.

And free send inquiries to us.

Email: stella@hanrm.com   stellarollingmill@gmail.com

Whatsapp/Wechat:+8615877652925

The History Of Rolling Mills

The History Of Rolling Mills

Hot rolling mills and cold rolling mills of metalworking between two or more rolls have been in existence since long before the industrial revolution.

When most people think of a rolling mill, they visualize sizable machinery in ferrous (iron, carbon steel, and stainless steels) and non-ferrous (copper, brass, lead, etc.) integrated or electric arc furnace (EAF) steel mill of today, to small manually cranked rolling devices used at jewelers to reduce the thickness of the precious metal or import a pattern on the surface of the metal to be fabricated into a chain or ring.

Rolling mills have many functions. They can be used to reduce the thickness of material quite accurately (+/-.0001") or compress the material to create a uniform density throughout the strip or impart a surface finish on one or both sides of the material, just to name the most common methods.

Rolling mills are not standard machine toll, nor are they built for stock. They are designed and built to order to specifically accomplish an end product or process.

At one point during the industrial revolution in America, the United States led the world in hot and cold rolling, plate mills, slabbing mills, and blooming mills. Companies such as Mesta, United, Blaw-Knox, Lewis, Continental, and Bliss were attributed to building some of the largest rolling mills in the world before World War II. In fact, Mesta and United pioneered the rolling process to reduce very thick as cast slabs into the plate, the plate into hot rolled coils and cold rolled coils.

Many of these old mills are still running today as a result of upgraded electrical and hydraulic systems, including hydraulic screwdowns, hydraulic roll bends, and tension control.

Please contact stella@hanrm.com for a quotation.

And free send inquiries to us.

Email: stella@hanrm.com   stellarollingmill@gmail.com

Whatsapp/Wechat:+8615877652925

The Main Tendency And Features Of Rolling Mill

The Main Tendency And Features Of Rolling Mill

Since the 1960s, with the development of iron-making and steel-making technology and the progress of the mechanical and electrical industry; with the wide application of computer automatic control technology and advanced science and technology, the production of steel rolling technology has made leaps in the growth and development. In a word, the main tendency and features of its development as the following:

1. The production process of strip and wire rods is continuous in the recent 20 years and would be more perfect if the continuous tube rolling mill and section continuous rolling mill came into being. And there are new types of rolling mills that were invented such as endless rolling, which is a completely continuous rolling production line. Including electric release ‘fat, annealing, cooling, k and coiling' process of finishing the rolling mill line also appeared in recent years cause of the widely applied wire rod mill in cold rolling belt californium and continuous welded pipe, which has greatly increased the production efficiency.

2. The constant improvement of rolling speed and the continuous production process created the condition of increased operating speed. All kinds of rolling mill speeds increased, Over the past 20 years. The Current wire rod rolling speed has reached 100 meters per second, cold rolled strip speed at 41.7m/s, and steel tube tension reducing speed up to 20 meters per second. And with the development of continuous automation, a variety of operating speeds will be increasing continuously. 

3. Production process automation is improving at all levels not only the important factor of production capability increased by technology and science but also the important prerequisite for improving product quality, labor-saving, and reducing consumption. The electronic computer developed after the 1960s has been applied more widely, especially the strip rolling has made the most full use of it. The currently used multi-level computer control system not only realizes the process control and digital direct control but also makes the computer technology applied by enterprise management. Many factories are expanding the electronic computer automatic control technology to the steel material finishing, heat treatment, nondestructive, and so on.

All in all, the increasingly large scale of iron-making and steel-making production capacity is bound to expand the rolling production scale. 

Please contact stella@hanrm.com for a quotation.

And free send inquiries to us.

Email: stella@hanrm.com   stellarollingmill@gmail.com

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The New 140m Laying Head And Increasing Gearbox Of Hot Rolling Mills To Iran Customer

The New 140m Laying Head And Increasing Gearbox Of Hot Rolling Mills To Iran Customer

Our company, Xi’an Hani Tech Co., Ltd, an enterprise with decades of experience in the business, has become one of the most advanced hot rolling mill equipment manufacturers and exporters in China.

We provide steel rolling mill project solutions for our customers in Dubai, Nepal, Abu Dhabi, Senegal, Indonesia, Sri Lanka and Pakistan, Arab, India, Egypt, Turkey, Bangladesh, Iran, and Iraq.

We provide complete technical details of our hot rolling mill products to our customers. 

Our rolling mills have received compliments from our clients worldwide due to their corrosion & rust-proof surface and sturdy structure.

The recent new products of laying head and increasing gearbox for Iran customers are as follows:

1. 140m laying head Core Parts.

2. 140m Laying Head Parts.

3. The New Increasing Gearbox for Hot Wire Rod Mill Production Line.

Please contact stella@hanrm.com for a quotation.

And free send inquiries to us.

Email: stella@hanrm.com   stellarollingmill@gmail.com

Whatsapp/Wechat:+8615877652925

The New Method Of Combining Emulsion And Neat Oil Lubrication In Cold Rolling Lubrication

The New Method Of Combining Emulsion And Neat Oil Lubrication In Cold Rolling Lubrication

One of the key processes in cold rolling is known as the cooling and lubrication process(cold rolling lubrication), it is not only determined the surface quality and strip shape but also reduced the rolling power consumption, and extends the life of the roll even during high-speed operation. 

As we discussed, a new method combining emulsion lubrication and neat oil lubrication was applied to solve the problems related to individual passes. Plenty of tests on stainless steel strips came to the conclusion that this new lubrication method can improve the surface quality of the strip, and control the rolling friction in the deformation zone, and it has the great potential of making lubrication systems simpler, easier to operate, all those while reducing the negative environmental impact from the processing. 

In direct supply lubrication, oil and water are mixed and then sprayed on the strip surface in the inlet zone directly, and there is a separate cooling system, therefore is most of them used for high-quality, tinned thin strips. 

Recirculated supply lubrication, as we knew, is mainly used for relatively thick strips and an emulsion sprayed on the roll and the strip acts as both a coolant and a lubricant.

However, in combined supply lubrication, the high-concentration emulsion is sprayed on the strip, and the low-concentration is sprayed on the rolling process. As generally known, high-concentration emulsions are better at cooling. Both of them are circularly used for relatively thick strips.

Although the above two methods have their merits, with the growing consumer demand for different types of high-quality products and the need for increased production, improvements in cooling and lubrication method are necessary and inevitable. So, the new method of lubrication that combines neat oil and emulsion lubrication takes advantage of its merits.

Please contact stella@hanrm.com for a quotation.

And free send inquiries to us.

Email: stella@hanrm.com   stellarollingmill@gmail.com

Whatsapp/Wechat:+8615877652925

The Rolling Mill Laser Cladding Technology

The Rolling Mill Laser Cladding Technology

The rolling mill laser cladding technology is a brand new surface strengthening technique that heats the powdered alloy or ceramic and the surface of the substrate to fuse them and cover the substrate with a less-dilution metallurgically bonded coating after the removal of the laser. This new type of treatment can improve the surface properties of the material like wear resistance, corrosion resistance, heat resistance, and oxidation resistance, along with its electrical characteristics. The ordinary 60# steel can reach a hardness high as 2200HV after being laser clad with tungsten carbide and perform 20 times better in wear resistance. The wear resistance of the Q235 steel laser clad with CoCrSiB alloy is also better than the flame-spraying ones.

As an advanced economically beneficial technology, laser cladding can cover low-cost metal substrates with high-performance alloy coatings without changing their original properties and reduce the cost of rare metals. Every industrially advanced country in the world is paying great attention to related research.   

The superiority of rolling mill laser cladding technology can be reflected in the following aspects:

 1. High cooling velocity (106K/s). Fine-grained micro-structures and rare phases like unstable phases and amorphous phases that could not be formed under common conditions can be easily gained with this fast solidification process.

2. Low dilution rate (less than 5%). The metallurgical bond between the coating and the substrate, and the Interface diffusion bond can be controlled with the technical parameters of the laser to obtain an excellent low-dilution coating with adjustable compositions.

3. Less thermal input and distortions. The distortions can be controlled within the range of tolerance, especially when it’s been laser clad with high power density.

4. Unrestricted coating powders, especially when cladding the fusible metal substrates with refractory alloys.

5. Large coating ranges. The thickness of the coating can vary from 0.2 to 2.0mm with one single powder feed.

6. Regional cladding with superior cost efficiency.

7. Flexible beam-aiming cladding to the inaccessible areas.

8. Easily automated and totally fit for the repair of common abrasions. 

The rolling mill laser cladding technology can also be used in the wear resistance and corrosion resistance fields for its large range of applicability which covers almost every aspect in the machinery manufacturing industries, such as coal, petroleum, electricity, railway, automobile, and aviation. Take the petroleum industry as an example, a large number of equipment like valves, centrifugal pumps, oil pumps, plunger pumps, screw pumps, and compressors breaks down every year. These units are expensive and various in type, which makes them hard to repair. But it won’t be a problem anymore with the help of laser cladding technology.

Please contact stella@hanrm.com for a quotation.

And free send inquiries to us.

Email: stella@hanrm.com   stellarollingmill@gmail.com

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The Solution For Slower Start-Up Speed Of Rolling Mill Machine

The Solution For Slower Start-Up Speed Of Rolling Mill Machine

The speed at which the rolling mill machine is started during operation has an important effect on the efficient operation of the rolling mill. If the rolling mill machine is slow to start when it is ready for operation, it indicates that the rolling mill has obvious defects in performance, which will seriously affect the working efficiency of the rolling mill. The force between the blank or the rolled stock and the roll also does not reach a good condition.

The rolling stock cannot be fully rolled in the rolling mill. In this case, the power consumption of the rolling mill is several times higher than usual. If this happens frequently, the speed of the rolling mill is not effective when it is turned on. Increasing the efficiency of the billet or the rolled piece will lower and lower. For the rolling mill machine, if the rolling mill is not capable of rapid overload start, the billet rolling speed will be too slow, and Hani Tech will analyze it. The reason why the rolling mill machine startup speed is slow. 

Before starting the rolling mill machine, first check the motor power, rolling speed, product specifications, hole type process, etc., to ensure that the blank load capacity does not exceed the bearing capacity of the rolling equipment, otherwise the equipment start speed will be slower. There is also a need to check the bearing of the rolling mill to see if the lubrication of the bearing is sufficient. If the lubrication is not enough, the start of the rolling mill machine will be slower or even malfunction.

Please contact stella@hanrm.com for a quotation.

And free send inquiries to us.

Email: stella@hanrm.com   stellarollingmill@gmail.com

Whatsapp/Wechat:+8615877652925