In the modern manufacturing industry, CNC machine tools have become important equipment for roll processing. Its high precision and high efficiency make the production process more automated and intelligent. However, when using CNC machine tools, operators must pay attention to many aspects to ensure the safety, reliability, and processing quality of the equipment. This article will introduce the precautions that require special attention during the operation of CNC machine tools to help improve production efficiency and product quality.
Creating an Ideal Installation Environment for CNC Machine Tools
According to the technical requirements of CNC machine tools for the installation environment, place the machine tool in a relatively dust-free location with constant temperature and humidity. While achieving this goal may be difficult, we should try to get as close to this ideal environment as possible. In addition, after the machine tool is installed and ready for normal use, you need to pay attention to the following matters.
Inspecting the machine tool before use can reduce the occurrence of malfunctions and thereby improve production efficiency.
- Before powering on, check the appearance of the CNC machine tool, electrical wiring, and external auxiliary equipment to ensure no abnormal situation. Especially with the hydraulic system equipment, should ensure the hydraulic oil level is sufficient; For the air pressure system, regularly drain the air compressor and gas storage pressure vessel to prevent excessive water accumulation, which can cause rust or damage to the internal parts of the machine tool.
- When powered on, start in the normal order: the total power supply of the machine tool, the power supply of the numerical control system, the power supply of the servo system, and then release the emergency stop button to reduce the impact on the electrical components of the numerical control system and extend its service life.
- After electrification, lubrication is essential for the normal operation of moving parts. Check whether the amount of lubricating oil in the lubrication device is sufficient, and replenish it in time if necessary. Regularly check whether the liquid filter screen is blocked to ensure that the oil circuit is smooth and the oil outlet points are normally drained of lubricating oil. If problems are found, they must be dealt with promptly. The moving parts of the machine tool such as the guide rail and the lead screw work in the state without lubricating oil, which will increase the friction resistance, waste electricity, and accelerate the wear of the parts, affecting the accuracy of the machine tool and the processing quality of the workpiece.
Key Precautions for Safe and Efficient Use of CNC Machine Tools
During use, strictly control the CNC machine tool within its specified parameters to avoid damage. Do not exceed the maximum load on the workbench for the machining center and CNC milling machine.Doing so can damage the movement guide rail. Avoid overloading the cutting force to protect the transmission mechanism. Overloading may burn the spindle or feed shaft motor due to excessive current. Additionally, avoid the machine tool’s natural frequency to prevent resonance. Resonance can affect processing accuracy and damage cutting tools and components.Use your senses—listen, touch, see, and smell—to detect and address problems promptly.
Monitoring CNC machine tools: Key sensory checks for safe operation
- Listen for sounds while the machine tool is running. Normal operation produces certain sounds, but watch for abnormal noises. Examples include the sound of a gas pipe bursting, changes in the lubrication system’s noise, or the “squeak” of the cutting tool. If you hear any of these abnormal sounds, stop the machine immediately to prevent further issues.
- Touch the machine tool to check its temperature. A temperature rise during operation is normal due to friction. Typically, the machine will reach thermal balance after running for a while, with a constant temperature around 50-60 degrees Celsius. If it feels too hot to touch, the temperature is excessive. Check if lubrication is sufficient in this case.
- Check the poor working conditions of the machine tool. CNC machines often spray coolant during processing, leading to iron scraps and cutting fluid buildup. This creates poor conditions for some parts, especially the stroke switch on the tool rest, where broken iron scraps may hinder movement. Clean these areas promptly to maintain proper function.
- During cutting, banded iron filings may wrap around the tool and workpiece. This affects cooling, causes extrusion, and can damage the tool.You must also clean these filings in time.
- Smell, smell whether there is an odor, mainly the tangy burnt smell of electrical pipelines.
Proper Shutdown and Maintenance Procedures for CNC Machine Tools
- Shut down the machine correctly. Follow the sequence: emergency stop button, servo system power, CNC system power, then the main power supply.
- Clean the machine tool promptly after use. Apply oil to the moving guide rail and certain parts for rus.
The above points highlight problems to watch for when using CNC machine tools. Paying attention throughout the entire process will maximize the machine’s efficiency, improve processing quality, and achieve the expected benefits.