The sheet metal shearing machine is a kind of forging machinery, belonging to the metal processing industry. It is widely used in aviation, light industry, metallurgy, chemical, construction, shipbuilding, automobile, electric power, electrical appliances, decoration and other industries. Plate shearing machine is a machine that uses one blade to make a reciprocating linear motion for another blade to cut the plate. It uses a moving upper blade and a fixed lower blade, and a reasonable blade gap is used to apply shearing force to metal sheets of various thicknesses to make the sheets break and separate according to the required size.
The sheet metal shearing machines are divided into 2 major categories: mechanical shearing machine and hydraulic shearing machine.
The mechanical shearing machine adopts a resistance key form clutch structure and an open gear drive, and is operated by a foot switch and a manual switch. Mechanical shearing machine is a kind of machine which is difficult to realize automatic control. The hydraulic shearing machine is a machine that can realize automatic control. The gap between the tools can be automatically controlled, with good mechanical properties and high machining accuracy.
The number of return strokes of mechanical shearing machine is basically 30 times per minute, and the number of return strokes of hydraulic shearing machine is 9 times per minute, so the efficiency of mechanical shearing machine is higher than that of hydraulic shearing machine. However, the mechanical shearing machine are noisy and vibrate, so the use of the equipment has a great impact on the operators and the factory environment. At the same time, due to the large vibration, the service life of the mechanical shearing machine is short. Moreover, the shear force of the mechanical shearing machine cannot be changed. In the process of operation, even if the shearing does not move, it will be forced to cut, and there is no self-protection device, so it is not as safe as a hydraulic shear. Furthermore, the gap adjustment of mechanical shearing machine is troublesome, and the cutting precision is not as good as that of hydraulic shearing machine.
In addition, hydraulic shearing machine have the following advantages.
(1) The hydraulic shearing machine uses a rectangular lower blade, and can use four cutting edges for cutting, which can extend the service life of the blade.
(2) An auxiliary knife seat is generally provided on the work surface of the shearing machine, which is used to adjust the blade slightly.
(3) The cutting stroke can be adjusted, so it can not only realize the segmental cutting, but also improve the cutting efficiency, and automatically count the cutting times, thereby reducing the workload.
(4) Adopt stepless adjustment to adjust the gap of the blade to adapt to the thickness of different plates and different cutting needs.
(5) The shearing machine is welded by steel plate, and the feeding ball is installed on the work surface, so the operation and use are very convenient.
(6) The hydraulic system of the hydraulic shearing machine adopts an advanced integrated hydraulic system, which can not only reduce pipeline installation, but also ensure the safety and reliability of operation.
Therefore, with the continuous development of industry, the requirements for the working accuracy of the machine are getting higher and higher. Now most processing industries are more inclined to choose hydraulic shearing machine, and there are fewer and fewer mechanical shearing machine manufacturers.
The hydraulic shears are mainly divided into swing beam shearing machine and guillotine shearing machine.
The swing beam shearing machine is a sheet metal shearing machine driven by hydraulic pressure. The upper knife frame of the swing beam shearing machine swings in an arc around a fixed axis during the cutting process. Through the action of leverage, the fulcrum is small and can Improve the life of the cutting blade and the life of the machine. The structure of the whole machine is compact, and the stroke of the upper tool post can be adjusted steplessly, which greatly improves the work efficiency.
The guillotine shearing machine has the advantages of strong shearing force and good shearing effect. It has always been praised by the majority of sheet metal processing. The frame structure of the guillotine shearing machine adopts all-steel welding. The four-corner eight-sided right-angle guide rail, high precision, and rigidity good, and use hydraulic preload. The hydraulic system adopts two-way cartridge integrated valve; the whole system adopts. And it can be equipped with stroke digital display, photoelectric protection device and mobile worktable (for easy replacement of molds). The guillotine shearing machine has double action of upper slide and lower hydraulic cushion function, the working pressure stroke can be adjusted within the specified range according to the process requirements, and the operation is easy and centralized control by buttons.
The hydraulic swing beam shearing machine is a circular arc motion, and the arc blade is quite difficult to make. Generally, the shim is used to make the horn after the blade, so the gap obtained is not, and the cut sheet is not very ideal, because It is an arc movement, the blade cannot be made into a rectangle, but should be made into an acute angle, so the force of the blade is not ideal, and the blade damage is also severe.
The guillotine shearing machine adopts the frame structure and adopts all-steel welding. The four-corner and eight-sided right-angle guide rail, high precision, good rigidity, and adopts hydraulic preload. The hydraulic system adopts two-way cartridge integrated valve, the whole system adopts "PLC" programmable controller, and can be equipped with stroke digital display, photoelectric protection device and mobile workbench (for easy replacement of molds). The double-acting function of the block and the lower hydraulic cushion, the working pressure stroke can be adjusted within the specified range according to the process requirements, and the operation is simple and centralized with buttons. There are three operation modes: adjustment, manual and semi-automatic.
In this comparison, the hydraulic guillotine shearing machine is a high-precision steel cutting machine that can realize intelligent control, which can meet the needs of the future high-efficiency, high-precision, and high-demand industrial requirements.
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