How to maintain CNC machine tools in winter

The daily low temperature warning without weather forecast and the heavy clothes, gloves and hats worn by people can tell how cold this winter is. In fact, not only people and animals, but those machines will also change due to changes in temperature, so doing winter maintenance work is particularly important. Therefore, based on our many years of experience and actual operation, we will briefly introduce some methods of winter maintenance of CNC machine tools, and hope to help you.

1. How to maintain the chip conveyor of CNC machine tools in winter to extend the service life?

There are many types of chip conveyors for CNC machine tools. Different types of CNC machine tools have different characteristics due to their different functions, structures and systems. The content and rules of maintenance also have their own characteristics. According to the type, model and actual use of the chip conveyor of the machine tool, and with reference to the requirements of the instruction manual of the chip conveyor of the machine tool, formulate and establish the necessary regular hierarchical maintenance system.

Strictly abide by the operating procedures and daily maintenance system. Numerical control equipment operators should strictly abide by the operating procedures and daily maintenance system. The technical and professional qualities of operators are important factors that affect the frequency of machine tool chip conveyor failures. When the machine tool chip conveyor fails, the operator should pay attention to keep it on site and explain the situation before and after the failure to the maintenance personnel in order to analyze and diagnose the cause of the failure and eliminate the failure in time.

two. How to choose machine tool rail oil, metal cutting fluid, hydraulic oil, and grease

Metal cutting machine tools are large and wide-ranging equipment, and their structural characteristics, machining accuracy, automation degree, working conditions and use environmental conditions are very different, and they have different requirements for the lubrication system and the use of lubricants. The machine tool is usually installed in an indoor environment. The maximum ambient temperature in summer is 40°C. When the temperature is lower than 0℃ in winter, heating method is adopted to make the ambient temperature higher than 5-10℃.

High-precision machine tools require a constant temperature air-conditioning environment, generally around 20°C. However, due to the high precision and automation of many machine tools, the viscosity, oxidation resistance (service life) and cleanliness of lubricating oil strictly require different types of machine tools with different specifications and sizes, even on the same machine tool, because of the conditions of the processed parts Different working conditions have different requirements for lubrication.

For example, the lubrication method and lubricant requirements of the grinding wheel spindle bearings of high-speed internal grinders are very different from the heavy-duty and low-speed spindle bearings of heavy-duty machine tools. The former adopts oil mist or oil-air lubrication system for lubrication, while the latter adopts oil bath or pressure circulation lubrication system for lubrication, using oil with higher viscosity.

three. There are many kinds of CNC machine tools. Various CNC machine tools have different characteristics due to their different functions, structures and systems. The content and rules of maintenance also have their own characteristics. According to the type, model and actual use of the machine tool, and referring to the requirements of the machine tool manual, formulate and establish the necessary regular grading maintenance system. The following are some common daily maintenance points

1. Strictly abide by the operating procedures and daily maintenance system.

2. Prevent dust and dirt from entering the CNC equipment.

3. Regularly adjust the tightness of the spindle drive belt to prevent belt slippage and cause rotation loss; check the spindle lubrication constant temperature oil tank, adjust the temperature range, replenish the oil in time, and clean the filter; the tool clamping device in the spindle will have a gap after long-term use. Affect the tool clamping, the displacement of the hydraulic cylinder piston needs to be adjusted in time.

4. Regularly check and adjust the axial clearance of the screw pair to ensure the reverse transmission accuracy and axial rigidity; regularly check whether the connection between the screw and the bed is loose; if the screw protection device is damaged, replace it in time to prevent dust or chips enter.

5. Regularly clean or replace the filters or sub-filters of each lubricating oil, hydraulic oil and pn