Continuous Rolling Mill

Continuous Rolling Mill

The main working principle of continuous rolling mill is that when the billet is heated and discharged from the furnace, the oxidized iron sheet is removed by high-pressure water, and then the billet is processed in a four-roll reversible roughing mill. Finally, the intermediate billet which we need and suitable for continuous rolling mill is rolled. In the process of billet opening, the vertical roll can effectively ensure the precise width of the steel plate and the intermediate billet. After shearing, it will directly enter the continuous rolling mill to wait for processing and can be rolled to the specifications required by customers at one time. After rolling, the coiler will take up the coil. In the process of rolling, the roughing and finishing mill needs high-pressure water for secondary dephosphorization.

Introduction of Four-roll Continuous Rolling Mill:

Main Uses: This kind of mill is a one-way and irreversible four-high cold rolling mill. It is mainly used for rolling stainless steel, aluminum, carbon steel, copper and zinc, and other metals.

Main Features and Structures: The main components of this rolling mill are reducer, motor, universal joint shaft, human gearbox, stand, pressing part, electronic control cabinet, and roll system. The roll system uses special bearings for continuous rolling mill. The material of roll is 9Cr2Mo. If it is a large mill bearing base, it will also have a roll changing device.

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.

Selection of Raw Material in Steel Rolling Mill Production

Selection of Raw Material in Steel Rolling Mill Production

In steel rolling mill production, ingots, billets and continuous casting billets are commonly used as raw materials, and die casting billets are also used.

  

Material selection should pay attention to:

(1) Production and quality should be considered.

Choose appropriate billet size, reduce rolling passes as much as possible to increase production, while ensuring compression ratio.

(2) Considering the economic benefits and production possibilities, all consumption should be reduced.

Raw material preparation is mainly to check and clean up various surface defects (scarring, cracking, slag inclusion, folding, etc.) If not cleaned before rolling, rolling will continue to expand and cause more defects.

Cleaning methods:

Flame Cleaning: As for carbon steel, low alloy steel, metal consumption is large

Wind shovel cleaning: suitable for carbon steel, alloy steel, high carbon steel (alloy steel has poor thermal conductivity, easy to crack by direct flame cleaning, must be preheated)

Grinding Wheel Cleaning (Planing): Suitable for alloy steel, peeling, the high metal consumption

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.

How to Install Cardan Shaft?

 

Cardan Shaft

How to Install Cardan Shaft?

1, When installing the cardan shaft, should check the product type on the specification model, and clear the flanges of cardan shaft .

2, For the cardan shaft with length compensation, should check the two ends of the forkhead phase, not at the same time, should be corrected by changing the position of the spline teeth.

3, When install, must not hammer the joint bearing.

4. Flange connecting bolts can only be worn from the flange end of the joint, the NUT is screwed by the flange side of the cardan shaft, and if the space of the joint is restricted, the double head bolts can be selected (except for special requirements).

5, Flange connection should use 10.9 class high-strength bolts and 10 high strength nut, twist the nut before the thread part of the bolt and daub a little grease.

6, Bolts, nuts need to have reliable measures to prevent loose.

7, When install should pay more attention to prevent the internal spline slips off.

8, In the possible cause of the operation of the cardan shaft caused by the damage of the site to add a universal shaft protective cover.

Cardan Shaft

Hani Tech is a Hot Rolling Mill manufacturing company working mainly in the area of the bar and wire rod mills, high-speed wire rod mills, high-speed rebar rolling mills, TMT rolling mills, flying shear, cold strip rolling mill, reheating furnace, induction furnace, intermediate frequency furnace, electric arc furnace, ladle refining furnace, blast furnace, continuous casting machine. 

We can supply designing, manufacturing, installation, and commissioning for your requirements about rolling mill plant with a “turn-key” service.  

Hani is the one-stop supplier able to design, manufacture, install and commission your hot rolling mill plant from A to Z. 

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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Cardan Shafts Assembly and Daily Maintenance

On the Application of Cardan Shaft in Hot Strip Steel Rolling

Why Does the Rolling Opportunity Fail to Roll?

Why does the rolling opportunity fail to roll?

In fact, the leakage of the rolling mill is quite common in the production process, which will have a serious impact on the normal rolling industry of enterprises. So, do you have a serious understanding of the factors of this kind of failure and the relevant solutions?


The basic conditions and factors of rolling mill leakage are the same. When the rolling mill is running, the rolled piece will certainly have a certain impact on the roll, which will lead to vibration and spring. In such cases, the rolled piece will pass through the mill directly and avoid contact with the rolls, which will lead to the leakage of rolling.


If this situation is persistent, then it is necessary to stop the rolling mill for maintenance and adjust the guide of the rolling mill. After research, it is concluded that if the rolling guide or closed mill is selected, this kind of failure can be effectively solved, and the effect is very good. If conditions permit, you can try it.

Hani Tech is a Hot Rolling Mill manufacturing company working mainly in the area of the bar and wire rod mills, high-speed wire rod mills, high-speed rebar rolling mills, TMT rolling mills, flying shear, cold strip rolling mill, reheating furnace, induction furnace, intermediate frequency furnace, electric arc furnace, ladle refining furnace, blast furnace, continuous casting machine. We can supply designing, manufacturing, installation, and commissioning for your requirements about rolling mill plant with a “turn-key” service.  Hani is the one-stop supplier able to design, manufacture, install and commission your hot rolling mill plant from A to Z. http://www.hanrm.com

If you are interesting, Pls contact me:
E-mail: Stella@hanrm.com 
Whatsapp/Wechat:+8615877652925
Website: https://www.hanrm.com

HOT ROLLING MILL PROJECT

HOT ROLLING MILL PROJECT

2. Production wire rod mill line Summarize

  1) Annual Capacity: Around 30,000tons wire rod mill

  2) Raw material: 100*100*3000mm billet 

  3) Finished products: wire rod ¢5.5--¢12

  4) Steel-types of rolling：Low carbon alloy steel, stainless steel, plain  carbon steel

2. Power consumption of total loads for the equipment

     Around 2650kw Approximately

3. Total price for the Turn Key ( Including Furnace, motor, etc. )

      

4. Design process: 

   The Billets feeding into the reheating furnace, and come to the rolling mill, through 3hi rolling mill to 2hi rolling mill, after 22 passes, and become finished products wire rod.

5. All equipment list from Manufacturing Area：

1).  Φ350 Rough rolling mill, 3-hi

Scope of supply

Item	Quantity	Note
Φ1800mm flying wheel	1 set	cast steel
Reducer 1pcs	1pcs	cast steel (herringbone tooth)
Three axle box A=350mm	1pcs	cast steel
Cardan joint	3pcs	cast steel
Rack  A=350mm	1set	cast steel
Mill roll	3pcs	70MO2Mn
Bearing pedestal	6set	cast steel
630KW-8 Motor	1pcs	630kw

2). Φ280 Rough rolling mill, 3-hi

Item	Quantity	Note
Motor	1set	540KW
Reducer 1pcs	1set	cast steel (herringbone tooth)
Three axle box A=350mm	1pcs	cast steel
Cardan joint	3pcs	cast steel
Rack  A=280mm（3-hi）	2set	cast steel
Rack  A=280mm（2-hi）	1set	cast steel
Mill roll	8pcs	70MO2Mn
Bearing pedestal	16sets	cast steel

Item	Quantity	Note
Motor	1pcs	280KW
Reducer	1pcs	ZD60
Composite reducer	1pcs
Herringbone tooth 2-axle box	2pcs	A=250
Rack	6pcs	A=250
Cardan joint	12pcs	SWP235type
Mill roll	12pcs	Nodular cast iron
Bearing pedestal	24set

3).  Φ250 one-drive-two rolling mill, 1 set    (K6--K5)              

    

4).  Φ250 one-drive-two rolling mill, 1 set    (K4--K3)  

Item	Quantity	Note
Motor	1pcs	280KW
Reducer	1pcs	ZD60
Composite reducer	1pcs
Herringbone tooth 2-axle box	2pcs	A=250
Rack	6pcs	A=250
Cardan joint	12pcs	SWP235type
Mill roll	12pcs	Nodular cast iron
Bearing pedestal	24set

5).  Φ250 one-drive-two rolling mill, 1 set   (K2--K1)                  

Scope of supply

Item	Quantity	Note
Motor	1pcs	320KW
Reducer	1pcs	ZD60
Composite reducer	1pcs
Herringbone tooth 2-axle box	2pcs	A=250
Rack	6pcs	A=250
Cardan joint	12pcs	SWP235type
Mill roll	12pcs	Nodular cast iron
Bearing pedestal	24set

6. Other equipment：

Item	Quantity	Note
Reheating furnace	1set	22m*3.5m
Pushing device	1pcs	form a complete set
Discharge machine	1pcs
Runout roller table	1set
Scattered cold roller	1set	40m
Head cutting shear	1pcs	Form  A  complete set
Tail cutting shear	1pcs
Pinch roll	2pcs
Winding machine	1set
Before the roller billet	1set
Lift roller	3set
Transportation Roller	3set
The connection roller	1set

7. Wire Rod Mill Layout: