Introduction to the types and structures of slitting machines
Slitting machine, also known as slitting line, slitting machine, and slitting machine, is used to uncoil, slit, and fold metal cold-rolled coils into coils of the required width. It is suitable for the production and processing of cold-rolled and hot-rolled carbon steel, silicon steel sheets, ferrous iron, stainless steel plates and various metal composite materials after surface coating.
1. Purpose: Suitable for vertical shearing of steel strips, and rewinding the divided narrow strips into reels.
2. Advantages: convenient operation, high laser cutting quality, high raw material utilization, infinitely variable laser cutting speed and other characteristics.
3. Structure: It consists of unwinding function (unwinding), precise positioning of material introduction, slitting and slitting, and unwinding (unwinding).
4. Available raw materials: horse iron, ferrite core, aluminum coil, copper, stainless steel plate, galvanized steel plate, etc.
5. Available fields: transformers, electric motors, household appliances, vehicles, decorative building materials, packaging fields, etc.
Types of slitting machines
1. Parallel blade shearing machine. The two blades of this type of shear are parallel to each other. It is generally used to shear blooming billets (square, square billets) and other slabs with square or rectangular frame cross-sections horizontally, so it is also called a slab shearing machine. This type of shearing machine sometimes also uses two forming blades to cold shear the billet (such as round pipe materials and small and medium-sized round steel, etc.). At this time, the shape of the cutting edge is consistent with the cross-sectional shape of the sheared billet.
2. Oblique blade shearing machine. The two blades of this type of shearing machine, the upper blade is tilted and the lower blade is horizontal, forming a certain angle with each other. The slope of the upper blade is 1° to 6°. This type of shearing machine is commonly used for cold shearing and hot shearing of thick steel plates, hot rolled strips, thin billets and welded steel pipe billets. Sometimes it is also used to cut entire bundles of small and medium-sized stainless steel plates.
When cold-rolling empty window materials, it is common to use an oblique blade shear to cut the top and tail ends of the hot-rolled strip (when the selected hot-rolled strip has not been cut), so that the large coil of hot-rolled strip can be welded. use.
The oblique blade shearing machine makes the upper blade slanted and the lower blade horizontal. Its purpose is to reduce the shear contact length with the sheared parts, thereby reducing the shearing force and increasing the capacity of the shearing machine. Reduce and simplify construction. The basic parameters of the oblique blade shearing machine are: maximum shearing force, blade inclination angle, blade length and shearing frequency. These parameters are determined based on the size and physical properties of the slab.
Slitting machine structure
The equipment of the slitting machine line generally includes: decoiler, guiding equipment, uncoiling beneficial support equipment, cutting shear, threading table, looper, disk shear, guide roller, machine train conveying roller, inlet clamp Holding equipment, constant support force unwinding equipment, edge crushing machines, waste trucks, coilers, paper lining equipment, etc. Slitting machines generally have the following types of methods.
A. Single-channel looper slitting
For this type of slitting, a looper is set in front of the shearing machine. The method of looping the amorphous strip into the gift channel includes the effective uncoiling method of the intermediate drive, the effective uncoiling method of tensioning, the effective uncoiling method of the undulating roller control method, etc. This method can achieve micro-tension or zero-support force shearing to prevent the shear blade from deflecting; in addition, the uncoiler can complete the amorphous strip centering in the looper without the need for centering equipment.
B. Single entrance and exit looper longitudinal cutting
For this type of slitting, a looper is set after the shearing machine. The sheared amorphous strip is fed by the shearing machine into an unsupported looper located between the shearing machine and the tensioning device. For thin strips, a channel edge guidance system may be needed to ensure smooth unwinding of the strip during shearing. This method can effectively avoid the different unwinding steps of each amorphous strip caused by the thickness difference, and realize the unwinding of the strip by controlling the unwinding support; due to the setting of the inlet and outlet looper, the amorphous strip can be discharged from the cutting edge at will , to prevent the amorphous strip from damaging the shearing blade under the condition of supporting force and endangering the service life of the shearing blade; in addition, because there is no supporting force at the entrance and exit, the shrinkage of the amorphous strip is prevented. Single entrance and exit loopers are widely used.
C. Double looper longitudinal cutting
Double looper longitudinal shearing combines two methods: channel looper longitudinal shearing and entrance and exit looper longitudinal shearing. After leaving the coiler, the amorphous strip enters before the shearing machine. It is fed into a random loop by the uncoiler or a pinch roller device or a tensioning device. The sheared amorphous strip leaves the shearing machine. After the trigger, another looper is given, and then it enters the tensioning device. Therefore, this type of slitting method is called "double looper" slitting. When slitting in this way, the slitting machine only divides the amorphous strip into grids, thus eliminating the possibility of the amorphous strip deviating at the edge of the scissors. This method combines the characteristics of a single-channel looper and a single-entry looper, and is suitable for shearing thin and soft amorphous strips.