Technical Overview of The Slitting and Cutting Line

Longitudinal and transverse shears are machines that cut the raw material longitudinally and transversely according to the actual needs of the customer in order to prepare the material for the subsequent forming process. The longitudinally cut material is generally used for continuous production. Such as: automatic stamping, rolling, secondary longitudinal and transverse shear processing, etc. The subsequent material after transverse cutting is generally used for single forming processing. Such as: sheet metal stamping, bending, stretch forming, etc.

As the longitudinal shear line generally to retain the function of slitting the raw materials after all rewinding, so compared to the horizontal shear line, the simplification of the longitudinal shear line is relatively much more single. General width below 800mm, thickness above 0.5mm below 2mm, plate strength σs <300MPa, weight below 5 tons, production speed of about 40m / min, before the simplification of the design. The simplification method is generally used to replace the auxiliary equipment such as hydraulic or pneumatic with human power. And because this kind of material volume is lighter, the production speed is slower rack rigidity is easy to ensure. And the installed capacity is low, covering a small area, suitable for small batch production use. But with the increase in board width, material thickness thickening, material roll weight, production speed, etc. design to a variety of safety factors need to be significantly increased, it is impossible to achieve the purpose of the simplified design.

Compared with the single design of the vertical shear simplification, the simplification of the horizontal shear line is obviously diversified, not only with its matching feeding system is variable, shear and after the stacking system also varies according to different needs, and the combination of each other is variable. Then the form simply can not be unified, so understanding the combination of related equipment is the fastest way to master the inner parallelism of the simple cross-cutting line configuration is one of the keys.

In fact, we can look at the whole cross-cutting line as an alternative to the ordinary stamping line. The substantial difference between these two types of equipment is that there are many materials in the stamping line that do not require straightening, while the cross-cutting line requires straightening without exception. Even in many high profile occasions the configuration of the straightening machine directly determines the value of the cross shear line. Based on this we can see the shearing mechanism itself as a punching machine, scissors as a mold, then the entire cross shear line can be disassembled into a similar peripheral equipment, punch and die, product collection and other conventional stamping line concept which is well understood. Now we will analyze the basic configuration conditions of each equipment in the simple cross-cutting line. Technical overview of the simple vertical and horizontal shear line

The simple cross shear line is also selected according to the customer‘s material for the bearing and correction part. As with conventional stamping lines, it can be combined as a separate unit or two-in-one (GO, ML, CL, TGL, etc.). The material loading part is selected according to the width and inner and outer diameter of the material, the pressing method according to the thickness of the material, the power size and expansion method according to the load and the configuration of auxiliary support or not. The straightening part selects the size and arrangement of the straightening wheel according to the material thickness, confirms the power of the straightening machine according to the speed, and determines the number of straightening wheels, the arrangement and the transmission mode according to the customer‘s requirements on flatness. As an export equipment, it is recommended that considering the general importance of safety abroad, it is recommended that the quotation of the press arm of the material frame and the correction of the frequency control speed should be given consideration as standard.

The feeding part of the simple cross-cutting line is selected according to the customer‘s requirements on the plate size and efficiency. According to the difference of power source, there are: AC frequency conversion sizing, DC motor sizing and servo motor sizing. For construction cross shears with not very good material quality and large sizing tolerance requirements, a circuit consisting of corrective power plus frequency converter and length measuring encoder can be used directly for sizing. For material thickness and strength, but the capacity requirement is not high, you can use the circuit of DC motor and length measuring encoder for sizing. For high speed, high capacity and high automation requirements, servo sizing is preferred.

Simple horizontal shear line shear part is divided into: equipment comes with the head shear, outsourcing finished mechanical (hydraulic) shear, pneumatic clutch high-speed shear (or hydraulic high-speed shear), etc.. For the output requirements of the simple horizontal shear line can be directly used to shear the plate head shear. For a wider width of the material, the thickness range of some of the more medium and low-grade horizontal shear line can be used to outsource the mechanical (hydraulic) shear. For higher shear requirements, a certain speed requirements are selected pneumatic clutch high-speed shear (or hydraulic high-speed shear).

Simple cross-cutting shear line product collection method is entirely dependent on the nature of such lines required by the customer. It can be divided into manual collection, simple lifting collection and automatic palletizing collection. For thin materials, short cut lengths and low output self-use type equipment can be collected and stacked manually. For shear length longer (generally longer than 600mm, beyond the manual clamping range) material width change is not a fixed type of horizontal shear line can be used to lift forklift for fixed size collection. For mass production type with large variation of material width and length or the nature of the customer as a material supplier, automatic stacking is the first choice.

For the initial production of materials, the slitting and cross-cutting lines are designed to be simple, while maintaining the basic functions of the corresponding lines. Especially for cross-cutting lines, different combinations can be created to meet the needs of different types of production. As with stamping lines, the best configuration is based on an understanding of the customer‘s final requirements. Therefore, the real understanding of the customer‘s real purchasing purpose is the beginning of all work.