Reasons for abnormal overload of pneumatic punching machine

The reasons for abnormal overload of pneumatic punching machines may involve multiple aspects, and the following is a detailed analysis of some of the main factors:
1、 Mold and workpiece factors
1. Improper mold design or manufacturing:
The sharp edge or uneven thickness of the mold may increase the resistance during punching, thereby increasing the load on the pneumatic punching machine. Excessive or insufficient clearance between the guiding parts of the mold can affect the punching accuracy and load of the punch press. Excessive clearance may cause mold shaking, while insufficient clearance may increase frictional resistance.
2. Material issues with workpieces:

The hardness, thickness, or shape of the workpiece material does not meet the requirements, which may result in an increase in the required punching force during punching. Defects such as inclusions and cracks in the material may also cause abnormal loads during the punching process.

2、 Punching equipment factors
1. Issues with the air pressure system:
Insufficient or unstable air pressure may cause the pneumatic punch to be unable to provide sufficient punching force, but it may also lead to overload in specific situations, such as sudden increase in air pressure. Blockage or leakage in the pneumatic pipeline can also affect the normal operation of the pneumatic system, which may lead to overload.
2. Transmission mechanism malfunction:
Wear or damage to transmission components such as crankshafts, connecting rods, and sliders may result in unstable motion or poor transmission of impulse force, leading to overload. Poor lubrication of transmission components may also increase frictional resistance, leading to an increase in load.
3. Control system malfunction:
Malfunctions in the control system, such as program errors, sensor failures, etc., may cause the punch press to fail to operate according to preset parameters, leading to overload.
3、 Operation and maintenance factors
1. Improper operation:
Operators who do not follow the operating procedures, such as excessive stamping speed or long stamping stroke, may cause overload. Operators who operate without fully understanding the performance of the equipment may also experience overload due to misoperation.
2. Insufficient maintenance:
Long term lack of maintenance and upkeep of equipment may lead to increased component wear, poor lubrication, and other issues, ultimately resulting in overload. Failure to follow the manufacturer's recommendations during maintenance, such as using inappropriate lubricants or not regularly replacing worn parts, may also affect the normal operation of the equipment.
4、 Environmental factors
1. High or low ambient temperature:
Excessive ambient temperature may lead to a decrease in the performance of the pneumatic system, thereby affecting the punching pressure of the pneumatic punching machine. If the ambient temperature is too low, it may cause an increase in the viscosity of the lubricating oil and increase the frictional resistance of the transmission components.
2. Excessive humidity:
Excessive humidity may cause electrical components to become damp, thereby affecting the normal operation of the control system.
In summary, the reasons for abnormal overload of pneumatic punching machines may involve multiple aspects such as molds and workpieces, punching equipment, operation and maintenance, and environment. In order to effectively prevent and handle overload problems, it is recommended to regularly maintain equipment, strengthen operator training and management, optimize mold design and manufacturing processes, and improve the working environment.