Types and Application of Slitting Machine

There are many types of slitting machine. Different type of slitting machines have different uses. Slitting machine particularly suitable for strip leveling machine and cold rolling light machine. After recrystallization annealing and galvanizing, the strip often needs to be slit, so that the strip obtains the necessary performance and surface quality to meet the requirements of post-process processing. In the leveling machine on the continuous hot-dip galvanizing unit, the leveling essence is a kind of rolling deformation under small pressure.

The benefits of galvanized strip steel using slitting machine are as below:

1. Using slitting machine can make the surface of galvanized strip steel become more flat and smooth, so that to have a uniform surface.

2. Can make the combination between the coating and strip become more solid and more conductive to the subsequent processing operation.

3. It can be eliminate the yield platform to prevent the strip line from stretching or deep flushing, thus affecting the appearance.

Slitting machine, in particularly suitable for strip leveling machine and cold rolling light machine. Automatic thickness control of oil leveling machine cylinder and servo.

The valve and accumulator are mounted and the hydraulic components are installed near the automatic thickness control cylinder; the working roller storage track on the driving side is installed on the base and the working roll cart on the operating side is installed on the trolley track on the base.

The invention greatly improves the response frequency of the servo control system, simplifies the design, long service life, easy for spot inspection workers to observe, provides great convenience for maintenance and maintenance, the time of changing the working roller is extremely fast, and can realize the strip in the state between the two working rollers, improve the operation rate of the leveling machine. It can replace imported equipment. Slitting machine can widely used in strip leveling machine and cold light rolling machine.

After recrystallization annealing and galvanizing, the strip often needs to be flat, so that the strip obtains the necessary performance and surface quality to meet the requirements of post-process processing. In the leveling machine on the continuous hot-dip galvanizing unit, the leveling essence is a kind of rolling deformation under small pressure.

The galvanized strip steel has the following advantages after leveling:

1. Make the coating surface more smooth

The surface of the strip steel after the coating shall be smooth and flat. The coating surface is covered with zinc flowers. Due to the segregation of zinc liquid crystallization, the zinc layer is convex when solidified first, and the solidified place is concave due to the shrinkage of zinc volume. If such strip steel is coated, these bumps will still appear on the coating surface. In order to eliminate these grooves completely, the strip steel of small zinc flower surface can be further leveled, and the uniform surface can be obtained.

2. Make the coating and strip steel structure more firm

With a flat roller with roughness to smooth the strip steel, the strip surface can obtain a certain roughness. The strip surface is rough, which increases the surface area combined with the coating when the coating, which will make the coating and the strip combined more firmly. In addition, the rough strip surface can accumulate more oil on the plate surface, and the plate surface oil is good for deep flushing.

3. Too smooth, can eliminate the yield platform, prevent the strip in stretching or deep flushing when sliding line. After heat treatment, although the plasticity has been greatly improved, but under the action of external force extension, such as yield phenomenon will occur, forming a yield platform. The yield platform will cause sliding lines on the surface of the strip steel during deep flushing or stretching. The presence of a slip line has no obvious effect on general use, but for those requiring high surface quality, painting the product after deep flushing is not allowed, because its presence reduces the surface quality of the product. In order to avoid the sliding line when stretching or deep flushing, the strip can be cold rolled or leveled after annealing to make the yield platform disappear. After the yield platform disappears, the steel plate can be evenly extended when stretched or deep.

4. Through leveling, the plate shape can be improved to make the strip steel surface more flat

Main control of Leveling machine are:

(a) extensibility

(b) flatness control

(d) surface quality control

1. Extensibility

The extensibility is adjust through strength of rolled and extensibility.

2. Flatness control

Straightness is the measure of the quality of steel plate. The control of flatness is more complex, which is related to the rolling force, tension, roll design of the leveling machine, bending roll force and the position of the anti-jump roll and anti-wrinkle roll before and after the leveling machine.

3. Roughness control

The surface roughness of strip is an important index that affects the subsequent processing performance of the product. The surface roughness is obtained by controlling the roughness of the leveling machine. The roughness of roller surface and the roughness of plate surface is related to the leveling method, rolling force, bending force, elongation and roller surface thinning process.

4. Quality of surface

The surface quality control of strip steel is complicated, which is related to the roller state of leveling machine, liquid purging, spraying and concentration of leveling liquid. Because the adhesion of the hot-dip galvanized zinc layer is relatively fragile, it is necessary to control the leveling process reasonably to prevent the zinc layer from falling off and cause surface defects. The kind of leveling liquid and the purging method of leveling liquid adopts will affect the surface quality of the strip steel.