CNC milling machine is a high-precision and high-efficiency machine tool, which is widely used in production and processing in various industries. However, in actual production, we often encounter frequent shutdowns of CNC milling machines, which has a great impact on production progress and efficiency. So, what is the reason for the frequent shutdown of CNC milling machines? In order to deeply analyze this phenomenon, this article will explore the reasons for the frequent shutdown of CNC milling machines from multiple dimensions and propose corresponding solutions.
1. Mechanical failure causes shutdown
Wear of the fork in the spindle box: During the hydraulic speed change process, the drive shaft and the sliding gear in the spindle box are installed vertically in the design, which makes the fork part bear greater pressure. It is easy to wear under long-term action, resulting in the gear not being able to be accurately in place, thereby affecting the normal operation of the machine tool.
Servo motor overheating: As a key component for driving components such as lifting platforms, the servo motor is prone to heat accumulation during long-term work. If the heat dissipation is poor or the brush is improperly installed, it will cause the motor to overheat or even damage, resulting in shutdown.
Thermal deformation of machine tools: Coaxiality deviation between the spindle bearing hole and the journal, poor lubrication, and other factors will cause the spindle temperature to rise, causing thermal deformation of the machine tool, affecting the processing accuracy and stability, and in severe cases, it may cause shutdown.
Lifting platform slides down: In the case of power failure or emergency stop, if the brake or self-locking device fails, the lifting platform may slide down under the action of gravity, which not only affects the processing accuracy but also may cause safety accidents.
2. Electrical failure causes shutdown
Power supply problem: Power failure or unstable voltage is one of the common reasons for the shutdown of CNC milling machines. When the power line fails or the grid voltage fluctuation exceeds the normal working range of the machine tool, the machine tool may shut down due to undervoltage, overvoltage, or power failure.
CNC system failure: As the brain of the machine tool, the CNC system may cause the machine tool to shut down due to hardware failure (such as circuit board damage) or software problems (such as program errors, or proper parameter settings). Especially when there is a problem with the PLC board or other key modules, the machine tool may not be able to perform normal operations.
Emergency stop button is-triggering: During the processing, if the emergency stop button is accidentally pressed or stuck, the machine tool will immediately stop all movements and lock the state, and it needs to be manually reset before it can continue to run.
3. Interference from external factors
Ambient temperature and humidity influence: CNC milling machines have certain requirements for the working environment. Too high or too low temperature and humidity changes may affect the normal operation of the machine tool. For example, high temperature may make it difficult for the machine tool to dissipate heat, which may lead to overheating and shutdown; excessive humidity may cause short circuits or corrosion of electrical components.
Electromagnetic interference: In industrial production sites, electromagnetic waves generated by various electromagnetic equipment may interfere with the control system of CNC milling machines, resulting in data transmission errors or control system failure, which may lead to shutdown.
Improper operation: The operator's unfamiliarity with the performance of the machine tool or violation of the operating procedures may also lead to shutdown. For example, overload operation, inertial impact during rapid movement, and failure to operate in the prescribed order may damage the machine tool and cause shutdown.
4. Insufficient maintenance and care
Lack of regular inspection and maintenance: As high-precision equipment, CNC milling machines require regular precision inspection, cleaning, maintenance, and lubrication. If these maintenance tasks are ignored, the machine tool components may age or be damaged due to wear, dirt accumulation, or poor lubrication, which may eventually lead to downtime.
Untimely replacement of spare parts: For parts that have reached their service life or have failed (such as forks, motors, etc.), they should be replaced in time to ensure the normal operation of the machine tool. If spare parts are not replaced in time, small problems may develop into major failures and cause downtime.
In summary, the frequent downtime of CNC milling machines is the result of the combined effect of multiple factors. In order to effectively reduce the occurrence of downtime and improve production efficiency and product quality, enterprises should take comprehensive measures from strengthening daily maintenance and maintenance, improving the skills of operators, improving working environment conditions, and selecting high-quality spare parts. At the same time, strengthening the research and study of CNC milling machine fault diagnosis technology is also the key to improving maintenance efficiency and quality.
As a professional CNC milling machine exporter, we are well aware of the significant impact of frequent downtime of CNC milling machines on production efficiency and product quality. To this end, we are committed to providing high-quality and high-stability CNC milling machine products with a complete after-sales service system. At the same time, we actively share the use and maintenance knowledge of CNC milling machines to help customers improve their operating skills and troubleshooting capabilities, jointly reduce downtime risks, and ensure smooth production.
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Wuxi Bofeng International Group Co., Ltd.
