Longitudinal cutting of metal is used for the manufacture of strips, metal strips and tapes, which are separated from the rolls in the metal industry. To carry out such work, it is necessary to have special equipment, which includes automatic complexes and machines. The presence of such facilities provides the necessary level of productivity and quality of metal cutting.
Schematic diagram of the device line slitting.
Work process: features
Longitudinal cross-cutting is performed using special circular shears. The material falls into the area of the cut, where it is fixed between the lower and upper shafts. The separation of the material is embodied by the applied clamping voltage, which is transmitted to the upper shaft.
The device machine for longitudinal-transverse cutting of metal.
During the whole process, the upper and lower elements do not stop their movement, which ensures sheet feeding continuously.
Under the influence of elevated temperatures, any material loses its rigidity. The same goes for the broom. Therefore, before cutting, it is heated with the help of currents, which reduces the load on the working disks.
With this technology, discs can be replaced by conventional rollers made of carbon steel. Then the metal will not be cut, but flared.Back to table of contents
Work complexes: nuances
To the longitudinal or transverse cutting of the metal occurred at the proper level, they use highly specialized equipment. Depending on the scheme of work with the sheet, you may need one or another type of technology. Depending on the task, there are several types of machines:
- Installation for longitudinal cutting.
Such a machine is used for both longitudinal and transverse cutting of dimensional metal plates. In this case, not the roll itself is loaded, but the cut sheet transported to the cutting zone.
Laser cutting technology.
In such complexes, disc shears freely divide the metal into strips of the required width. You can work with sheet steel, copper, sheet aluminum, thick cardboard and structural polymers.
In this design, the fixation of the cutting tool occurs on the pressure shaft with screws. You can set the width of the segments with the help of automation or manually.
If you use a more modernized machine, then, in addition to longitudinal cutting, transverse cutting can be carried out. In this case, the unit will have a head with cutting rollers fixed on screw shafts. If necessary, such machines apply a protective film on the metal, which is placed in a special unit.
- Longitudinal metal cutting line.
Such equipment can stand in large plants, as well as in smaller ones. This complex provides a high level of performance. It is possible to produce not only stripes of different widths, but also to set the length.
Most often, these machines are found in the factories engaged in the manufacture of strips, dimensional blanks for stamping and other products derived from sheet metal.
Such a system has the main components and mechanisms:
Diagram of the laser cutting process.
- bunker - used to store metal roll;
- conveyor - consists of a complex of feed rolls, which provide unwinding of the roll and feed the metal into the cut zone;
- the cutting unit is the machine where the longitudinal cutting of the metal takes place.
This system is additionally equipped with transverse cutting units. Immediately, it is worth noting that in this version of the equipment, there are units that operate on the basis of software control, which allows creating high-frequency processing.
After the blanks are made, they are further processed in order to eliminate the voltage that appears during the softening process with induction currents.
Such systems are distinguished by high productivity, as well as a wide range of workpiece sizes.
- The unit for longitudinal cutting.
This system is fully automated. Such equipment is rational to use in large volumes of production of metal products.
This unit includes the following main elements:
Diagram of the solid-state laser for metal cutting.
- Conveyor. It is presented in the form of a trolley with a bunker, which are mounted on rails.
The movement of the trolley in the opposite direction from the cutting area ensures the unwinding of the roll, the edge of which is loaded into the pressure rollers. They also fix the metal so that it does not coil back into a roll, which provides more accelerated work.
- Complex pretreatment.
It cuts off the edges of the sheet and heats it before the metal enters the cutting. For waste, there are special bays that reel in unnecessary lengths.
- Longitudinal cutting block.
In it, the material is divided into separate blanks according to the required parameters. The whole process is carried out due to the presence of circular knives.
- Loopback compensator. Controls the speed of movement of the finished segments.
- Drum. "Collects" the processed workpiece by winding them on your body.
- Drum discharge system Frees the element from the rolls.
Metal cutting in such a unit is controlled only with the help of automation. Such systems are used only in large-scale production, as they provide high performance.Back to table of contents
Types of cutting and why they are needed
In addition to the mass production of metal strips, sometimes there is a need for more subtle work.
In the first case, the products go for use in roofing and ventilation works, during installation of air duct systems and in the manufacture of advertising structures.
As for the second point, thanks to the development of modern technologies, it has become possible not only to do the cutting of metal in the transverse and longitudinal direction, but also to perform more “jewelry” work.
- Artistic cutting material.
Used for the manufacture of decorative fences, works of art from metal, aluminum, copper, low carbon or stainless steel. The production of gates, ladder structures, fences and railings will not do without this. With its help, supports, decorative panels, frames, individual logos and letters are made.
- Laser cutting metal.
A more advanced technology that allows the entire process to be carried out much faster, and with high-quality products. Due to the lack of logging and milling, the cost of such cutting is quite low.
Parts have the exact forms that are obtained due to the elimination of the dynamic impact on the material. With the help of laser cutting, furniture sets, cars, and various equipment are made, and are also used to create outdoor advertising.
Provides high precision metal cutting, while the ends of products have a perfectly smooth surface. Used in work with carbide materials, which led to significant savings in energy resources and time. It is also possible to adjust the depth of cut.
- Figured cutting.
To create the desired product, the laser moves along a predetermined contour. This method is used to create decorative elements, as in the process of work does not affect the metal, and this, in turn, allows to avoid deformations.
- Contour cutting of metal.
In the manufacturing process, the metal does not need further grinding or any treatment of the ends. Makes it easy to cut intricate shapes. The working beam has a small diameter of 0.2-0.4 mm, which helps to avoid curvature.
Depending on the purpose of metal cutting, the selection of the right equipment will depend on, but the more complex the task, the more complex the complex will be. The presence of certain functions will be reflected in the configuration.