Comparative Analysis of the Characteristics of Mechanical and Hydraulic Shearing Machines

Mechanical shearing machines are difficult to automate. They generate significant noise and environmental pollution, and the blade clearance is difficult to adjust. However, their low price makes them popular among small and medium-sized enterprises.

Hydraulic shearing machines can be automated. Controlled by hydraulic oil, they are quieter, operate in a better environment, and offer automatic blade clearance control. They also boast superior mechanical performance and high processing precision. However, they are more expensive, and are more commonly used by medium and large-sized enterprises.

With continuous industrial development, the demand for machine precision is increasing. Therefore, the production value of hydraulic shearing machines will continue to grow in the future machinery industry, leading to higher requirements for hydraulic technology. Hydraulic shearing machines are divided into swing beam shearing machines and guillotine shearing machines. Swing beam shearing machines, due to their arc-shaped motion, and the difficulty in manufacturing arc-shaped blades (usually requiring shims after the blade), result in uneven clearance and less than ideal sheared sheet metal. Because of the arc-shaped motion, the blades cannot be made rectangular but must be acute-angled, leading to less than ideal blade stress and more blade damage. Domestic representatives of swing beam shearing machines include Tianshui Machine Tool Factory and Shanghai Punching and Shearing Machine Tool Factory.

Guillotine shearing machines feature a frame structure made of all-steel welded steel; four corners and eight-sided right-angle guide rails, high precision, good rigidity, and hydraulic pre-tensioning. The hydraulic system uses two-way cartridge integrated valves; the entire system uses a PLC programmable controller; and it can be equipped with a stroke digital display, photoelectric protection device, and movable worktable (for easy mold replacement). Guillotine shearing machines have dual-action functions of upper slide and lower hydraulic cushion. The working pressure and stroke can be adjusted within a specified range according to process requirements. Operation is simple, using centralized button control. It features three operating modes: adjustment, manual, and semi-automatic.

In comparison, the hydraulic guillotine shearing machine is a high-precision steel cutting machine capable of intelligent control, and can meet the demands of future high-efficiency, high-precision, and high-requirement industrial applications.