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What Is The Working Principle Of Shearing Machine?

The working principle of hydraulic shearing machine

When the upper cavity of the left cylinder of the machine enters the oil, the piston descends, and at the same time the oil from the lower cavity enters the upper cavity of the right cylinder to lower the piston, thereby ensuring the parallel movement of the blade carrier. When the amount of oil in the tandem oil circuit increases or decreases, the shear angle of the cutting blade changes accordingly. This kind of structure often uses a nitrogen accumulator to push-one or two return cylinders to shorten the inter-travel time, thereby increasing the productivity of the machine.


Shearing machine should be able to ensure the straightness and parallelism requirements of the shearing surface of the sheared sheet and minimize the distortion of the sheet to obtain high-quality workpieces. The upper blade of the shearing machine is fixed on the knife holder, and the lower blade is fixed on the workbench. Ball transfer table is installed on the workbench so that the sheet material will not be scratched when sliding on it. The back gauge is used for positioning the plate, and the position is adjusted by the motor. The sheet holding cylinders are used to compress the sheet to prevent the sheet from moving during shearing. The guard fence is a safety device to prevent work-related accidents. The cutting blade return stroke generally relies on nitrogen, which is fast and has little impact.

Parts Display Of Shearing Machine

What Are The Types Of Shearing Machine?

The Main Application Of Shearing Machine

For Plate Shearing

Shears are no strangers to people working in factories. In the process of producing finished products in many large and medium-sized factories, shearing machines are indispensable mechanical equipment. It can be said that any material can be cut by the shearing machine to cut the board of the design you want. For example, relatively hard metal materials and some sturdy non-metallic plates can be accurately cut to various sizes with a shearing machine. The application field of the shearing machine is also very wide. In addition to being used in the production workshop of the factory, it can also be used in the design of construction bridges, the production parts of automobiles and the workshops of automobile repair departments, etc.

As Part Of Coil Cut To Length Line

The coil cut to length line is mainly composed of coil loading trolley, decoiler, leveling machine, feeding mechanism, shearing machine, conveying device, stacking device, etc. The production line can be equipped with a normal shearing machine or high-speed shearing machine to cut the sheets into the required length and stack them.

How To Clean And Maintain The Shearing Machine?

    1. After the processing of each shift, the operator should clean up the leftover material scattered around the front and back of the shearing machine. Run the shearing machine till upper blade back to top dead point before power off the machine.
    2. Check to make sure whether the oil volume and nitrogen volume of each lubricating oil tank meet the requirements. Check each manual lubricant point, add grease or oil according to regulations.
    3. Check whether there is lubricating oil on the surface of the machine guide rail and the ball screw to keep them well lubricated.
    4. Check and confirm the hydraulic system working properly.
    5. Observe the cutting situation at any time during work. If there is any abnormality, press the emergency stop button immediately.
    6. Turn off the power to prevent non-professional operation before leaving the machine.
    1. Complete cleaning of the machine every week. Add lubricating oil to each guideway surface, sliding surface, rolling ball and each screw rod.
    2. Check and tighten the tool fixing screws, transmission mechanism, handwheel, workbench support screws, and top screws.
    3. Check whether the oil filter is clean, if it is dirty, it must be washed.
    4. Check the filter screen of each electrical cabinet and clean the adhering dust.
    Check that the lubricating oil pipes are unobstructed, the oil gauges are bright, and whether there are deposits in the oil tank.
    1. Clean the chips and grease inside the machine.
    2. Add oil to each lubrication point.
    3. Check whether all transmission parts are loose, check the meshing of gears and racks, adjust or replace if necessary.
    4. Check and adjust the sharpness of the knife edge, and find that the knife edge is blunt, sharpened or replaced in time.
    5. Check and adjust the knives and inserts for proper tightness and proper clearance.
    6. Check the power cabinet and operation platform, whether the fastening screws are loose, use a vacuum cleaner or a blower to clean the dust in the cabinet. Check whether the wiring head is loose.
    7 Check the performance of all buttons and selector switches, all contact points are good, no leakage, or damaged replacement.
    1. Check the ball screw, wash the old grease on the screw, and replace with new grease.
    2. Replace the bearing grease. When replacing, be sure to clean the bearing.
    3. Clean all kinds of valves and filters, clean the bottom of the oil tank, and change the oil according to regulations.
    4. Check the surface of the motor commutator, remove burrs, blow off the carbon powder, and replace the carbon brushes if they are too worn.

Precautions For Shearing Machine

 Before operating the shearing machine, wear tight-fitting protective clothing, fasten the cuffs, and do not open the hem of the jacket. Do not wear, take off or change your clothes next to the operating machine to prevent the machine from being twisted. Safety helmets must be worn, braids should be put inside the cap. Do not wear skirts, slippers, or scarves to operate the machine.

 The operator must be familiar with the structure, performance, and operation methods of the equipment, and it is strictly forbidden to use the equipment over the performance standard.

 Check the oil volume of the oil cup before starting and add grease according to the equipment lubrication regulations.

 Before work, the upper and lower blades should be set to the knife. The blade gap should be determined according to the thickness of the sheared steel plate, generally between 5~7% of the thickness of the sheared plate. Every time the gap is adjusted, the flywheel should be turned by hand. Make the upper and lower blades reciprocate once and check whether the gap is proper with a feeler gauge.

 Set and adjust the back gauge according to the requirements of the cut workpiece. Before working, you should try running for 2 to 3 times without load to confirm that the lubrication is good and there is no abnormality in the operation before you can start the work.

 It is forbidden to use percussion method to adjust the back gauge device or adjust the blade gap. When adjusting the gap between the guide rail and the knife edge, stop the machine before proceeding.


It is forbidden to reach into the cutting area during the working process, and it is not allowed to pick up and pick up materials by hand.

No other items should be placed on the workbench to avoid entering the cutting edge and damaging the blade.

When cutting sheets of different thicknesses and different materials, the pressure of the plate spring and the blade gap should be adjusted appropriately to prevent the spring from breaking or damaging the cutting edge. It is forbidden to cut bars.

Always pay attention to whether the clamping mechanism, clutch and brake are abnormally malfunctioning; when cutting, you should concentrate on cutting. If you find any abnormalities in the equipment, you should stop cutting immediately, cut off the power supply, and notify the relevant personnel for maintenance.

The cutting edge of the blade must be kept sharp. If damage, wear, or dullness is found, it should be sharpened or replaced in time.

After the work is completed, the power supply should be cut off and the equipment should be maintained.

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