Operating procedures for shearing machine

（1） Preparation before operation

Wear labor protection equipment according to regulations, such as tight fitting protective clothing, fasten all buttons, keep the top closed, wear a safety helmet, etc., and prepare for operation.

Check the equipment status, including whether the rotating parts, safety devices, lubrication system, upper and lower blades are normal. According to relevant regulations, check the equipment and prepare for driving. The motor is not allowed to start with load, and the clutch should be disengaged before starting.

Check if the blade is sharp. If it is not sharp, it needs to be sharpened or replaced in a timely manner. The blade will become dull after a period of use, and it needs to be ground to ensure that the blade is sharper and more efficient. When grinding, start from the flat surface of the blade to ensure brightness and no blunt edges, and then grind the side surface, paying attention to parallelism. If the blade is found to be tilted on the ground plane, the grinding pressure can be adjusted by applying appropriate force on the slightly thicker side, and the accuracy of the grinding plate should be checked and calibrated regularly. If the temperature of the workpiece exceeds 40-50 ℃ during the grinding process, it is necessary to pause for a period of time until it cools down before continuing, as heating will affect the accuracy of the blade. After grinding, a layer of anti rust solution should be applied to prevent rusting.

（2） Precautions during operation

Overloaded use of shearing machines is prohibited, and quenched steel, high carbon steel, alloy tool steel, cast iron, and brittle materials must not be sheared. The shearing machine is suitable for cutting various steel plates, copper plates, aluminum plates, and non-metallic material plates with a thickness equal to the rated value of the machine tool, and must be materials without hard marks, welding slag, slag inclusions, and welds.

When attempting to cut different plate thicknesses, it is necessary to adjust the blade clearances accordingly. When adjusting the blade clearance, it can be adjusted according to the punching clearance value of the cold stamping die, generally taking 3-4% of the material thickness. It can also be adjusted according to the state of the shearing machine, such as adjusting the reading to 50 threads, using a feeler gauge to calibrate from the beginning at intervals of one grid, and in the zero position, ensuring that three threads can fit in and five threads cannot fit in. For old cars, adjust the feeler gauge to fit ten threads but not twenty threads, or make appropriate adjustments according to 1/10-1/20 of the required cutting thickness of the sheet metal. During the adjustment process, it is important to carefully pull one or two screws at a time, otherwise it may bite the knife.

Maintain sound balance during operation. If there is any noise, stop and check. During the cutting process, turn on the pressure gauge switch and observe the oil pressure value. Do not increase the pressure to cut the specified material, otherwise it will damage the machine.

When feeding, pay attention to finger safety, especially when cutting a sheet to the end. Do not place your fingers under the sheet or feed them into the blade. When feeding, your fingers must be at least 1200 millimeters away from the blade. It is strictly prohibited for two people to cut two materials simultaneously on the same cutting bed, and no one is allowed to stand on the cutting bed after receiving the materials.

The blade must remain sharp, and when cutting thin sheets, the blades must be close to each other. The upper and lower blades need to be parallel, and the gap between the blades should not exceed one-third of the sheet metal thickness. Manually rotate the flywheel to make the upper and lower blades move back and forth once during each gap adjustment, and use a feeler gauge to check if the gap is appropriate.

It is not allowed to stack debris and tools on the machine, in order to maintain the cleanliness of the machine and the site at all times. After driving, it is not allowed to pick up the car. Every time you step on the pedal, immediately lift your foot off the pedal.

When cutting, the pressure plate must firmly press the board, and the cut board and thickness should meet the requirements. Overloading is strictly prohibited. Always pay attention to whether the pull rod is faulty and whether the fastening screws are loose.

（3） Post operation processing

Adjustment and cleaning must be stopped. After adjusting the blade, the empty car must be driven for inspection, and sudden start-up is strictly prohibited.

If the machine is found to be running abnormally during use, the power should be immediately cut off and the machine should be stopped for inspection.

After work, cut off the power and lock the power box. The triangular belt, handle, and buttons of the shearing machine blade should be regularly inspected for damage, and the shearing machine blade should be replaced in a timely manner when severe wear occurs. Before leaving work each time, it is also necessary to lubricate and clean the machine. The blades of the shearing machine must be kept clean at all times, and attention should be paid to preventing rust in areas without paint. Quality work such as switches should be done regularly. The bearings of the electric motor should also be replaced and refilled according to the prescribed time, and the electrical parts should be checked for safety times.