Siheyuan: Start at level 60, beat up all the animals

Chapter 171 Unlock the rolling mill design skill and design a rolling mill

Li Yang walked out of the factory director's office with joy and a confident smile on his face.

He knew that participating in the national excellent design selection was not only a recognition of himself, but also an opportunity for the steel rolling mill to leap forward.

Back in the office, Li Yang took off his coat, rolled up his sleeves, and prepared to start a new round of design work.

The first item he was going to design was the core equipment for production - the rolling mill.

As a steel rolling mill, as the name suggests, steel rolling is its first production task.

Steel rolling is the process of repeatedly rolling steel billets or ingots into steel products with certain cross-sectional shapes, sizes and properties through rolling processes using rolling mills and other equipment.

However, the steel rolling equipment currently used in the factory were all imported from Russia.

As relations deteriorated, Russia withdrew all its experts and the equipment lost technical support.

After a few years, the technological level of the rolling mill has long fallen behind the times.

At this time, most rolling mills used reversible rolling mill frames.

This kind of rolling mill can only perform single-pass rolling when the workpiece passes through it once, which is inefficient.

The workpiece needs to go back and forth many times before it can be rolled into shape.

Moreover, due to the low precision of transmission and guide, the rolled steel has large dimensional deviation and unsatisfactory surface quality.

Li Yang looked at the rows of chimneys outside the window with a frown on his face.

He knew that in order to revive the steel mill, the rolling mills had to be thoroughly transformed and upgraded.

With his extraordinary talent and the help of the system, he was determined to design a completely new rolling mill system.

Li Yang took out a stack of drawings from the drawer and looked at them carefully.

This is the rolling mill structure diagram he drew in his spare time.

At the same time, he dug out some information left by former experts on the Russian bear and began comparative research.

Just as Li Yang was concentrating on studying the drawings, a familiar voice suddenly sounded in his mind.

[Ding! The host unlocks the rolling mill design skill!]

Then the system added:

[Given the host's current industrial foundation, the rolling mill design skill is temporarily simplified to drawing rolling mill drawings. Repeatedly drawing existing drawings can quickly improve proficiency. The higher the proficiency, the more advanced the rolling mill design that can be unlocked. ]

Li Yang smiled knowingly and clenched the pencil in his hand.

He adjusted his sitting position and began to draw on the drawing.

At first, he just copied mechanically, but gradually, his movements became more and more fluent and his ideas became bolder and bolder.

[Ding! Rolling mill design proficiency +10, current proficiency 30!]

[Ding! Rolling mill design proficiency +10, current proficiency 70, triggering advanced rewards!]

[Ding! The host's rolling mill design proficiency has reached 100, unlocking advanced design skills and design drawings. Please check!]

As Li Yang was drawing the blueprints repeatedly, prompt sounds kept ringing in his mind.

It seemed like a long time had passed, but also like just a snap of the fingers, Li Yang mastered the essence of rolling mill design.

As the last prompt sounded, an unprecedented stream of information poured into Li Yang's brain.

Like a tide, it flooded his entire consciousness.

That is a vast amount of knowledge and drawings about rolling mill design.

Through the complicated information, Li Yang saw two-roll reversing mills, four-roll reversing mills, small and medium-sized continuous rolling mills, bar continuous rolling mills, wire rod continuous rolling mills, plate and strip continuous rolling mills, etc.

Structural diagrams of rolling mills from different eras and for different purposes unfolded before his eyes.

It turns out that the process of steel rolling is so complicated!

Blooming, rough rolling, finishing rolling, shearing and cooling, each link requires special equipment.

Among them, the most critical ones are the roughing mill and the finishing mill. The roughing mill must have a sufficiently large rolling force, while the finishing mill must have a high rolling accuracy.

In addition, the design of the rolling mill transmission system is also crucial.

Gear transmission, universal joint transmission, motor direct transmission...obscure terms flashed through his mind, but in Li Yang's eyes, they became extremely clear.

There is also the rolling mill guide system, and the layout of the working rolls, support rolls, and guide rolls all affect the surface quality of the steel.

At the same time, the power of the main motor of the rolling mill, the rolling speed, the serpentine and twisting of the rolled piece... every slight change in the parameters will affect the change in the rolling effect.

Li Yang quickly browsed through the knowledge, and what he saw was broad and profound.

From the reversible rolling mills in the 60s to the automated continuous rolling mills in the 21st century; from extensive production to refined operations with precise control of every parameter, the steel rolling process has undergone several major changes.

However, Li Yang is also clearly aware that the current industrial foundation restricts his room for development.

Those complete sets of rolling mills that represent the industry's top level are readily available but difficult to implement.

After careful consideration, Li Yang decided to start with a simple continuous rolling mill.

Compared with the reversible rolling mill, the biggest advantage of the continuous rolling mill is its high rolling efficiency, which can realize the continuous rolling of steel billets.

By cleverly arranging the mill frames and drives, production can be greatly increased.

Li Yang spread out a new blueprint, his eyes sharp, his pen pointed down, and he began a new round of design.

This time, he started designing from the most basic rough rolling mill, optimizing it step by step without missing any details.

After the roughing mill, he designed three four-roller reversible rolling mills to form the roughing mill unit.

In this way, after rough rolling, the cross-sectional size of the steel billet is greatly reduced, which can reduce the load on the subsequent intermediate rolling mill and finishing rolling mill.

Then, Li Yang drew two parallel steel rolling production lines in the blank space on the drawing.

One is used for rolling large profiles, and the other is used for rolling small and medium-sized profiles.

Such a layout can flexibly adjust the product structure to adapt to the diverse needs of the market.

In order to ensure the smooth connection of the rolling process, Li Yang also designed an overhead crane and conveyor roller between the two production lines.

The overhead crane can quickly transport the rolled products to the next unit, while the cooling bed roller can cool the rolled products.

For the transmission system of the entire rolling mill, Li Yang adopted the then advanced direct-drive motor transmission.

The transmission efficiency is high, the noise is low, and it is easier to realize automatic control.

After being decelerated by the transmission system, the rolling pressure is applied to the billet through the rollers to complete the rolling process.

In order to further improve the rolling accuracy, Li Yang was not satisfied with conventional rollers and bearings, but designed a hydraulic support roller system.

By supporting the rollers with hydraulic cylinders, the roller gap can be adjusted in real time to control the thickness of the rolled product.

At the same time, the hydraulic system can also play the role of overload protection to prevent the rolling mill from being damaged due to vibration or impact.

As for the guide and guard system of the rolling mill, Li Yang chose the most advanced CVC adjustable guide and guard set at that time.

The guide rollers are arranged asymmetrically, with the inlet guide rollers arranged in double rows and the outlet guide rollers arranged in single row.

This arrangement can achieve a good guiding effect, which can prevent the rolled piece from snaking and eliminate the difference between the head and tail of the rolled piece.

In addition, Li Yang also equipped the rolling mill with a high-pressure water descaling device.

High-pressure water jets can remove the iron oxide scale on the surface of the rolled piece, improve the surface quality of the rolled piece, and reduce the subsequent pickling or grinding process.

After careful design, a brand new continuous rolling mill came to life on paper.

The roughing mill, finishing mill and the intermediate conveyor roller form a compact and coordinated whole.

This is a semi-continuous steel rolling production line, which inherits the advantages of rolling mills in previous years and incorporates new design concepts.