Maintenance of CNC machining equipment

For the equipment of the CNC machining center, correct operation and maintenance are essential. Doing this work can prevent the normal wear of the machine tool and avoid the sudden failure of the equipment. So let me tell you how to maintain the CNC machining center equipment.

First of all, let's talk about the work that the relevant person in charge of maintenance has to do:

1. The operator is responsible for the use and maintenance of the equipment and basic maintenance;

2. Equipment maintenance personnel are responsible for equipment maintenance and necessary maintenance;

3. Workshop management personnel are responsible for the maintenance of operators and equipment in the entire workshop. Supervision.

Secondly, let's take a look at the basic requirements for the use of CNC machining center equipment:

1. CNC equipment requires avoiding moisture and excessive dust and places with corrosive gases;

2. Avoid direct sunlight and other thermal radiation, and keep precision CNC equipment away from equipment with large vibrations, such as punching machines, forging equipment, etc.;

3. The operating temperature of the equipment should be controlled between 15 degrees and 35 degrees. The precision machining temperature should be controlled at about 20 degrees, and the temperature fluctuation should be strictly controlled; Dedicated line power supply (such as a separate channel from the low-voltage power distribution room for the use of CNC machine tools), the addition of voltage stabilizers, etc., can reduce the impact of power supply quality and electrical interference.

5. After starting the machine, it must be preheated for about 10 minutes before processing; the preheating time should be extended for machines that are not used for a long time;

6. Check whether the oil circuit is smooth;

7. Place the worktable and saddle at the center of the machine before shutting down (move the three-axis travel to the middle of the travel of each axis);

8. Keep the machine tool dry and clean.

Finally, let's take a look at the daily, weekly, monthly and semi-annual equipment maintenance methods of CNC machining centers:

About each Daily maintenance methods:

1. Clean the dust and iron filings of the machine tool daily: including the machine tool control panel, spindle taper hole, tool car, tool head and taper shank, tool magazine tool arm and tool Warehouse, turret; XY axis sheet metal shield, flexible hose in the machine tool, tank chain device, chip groove, etc.;

2. Check the height of the lubricating oil level to ensure the lubrication of the machine tool;

3. Check whether the coolant in the coolant tank is sufficient, and it is not enough to be added in time;

4. Check whether the air pressure is normal;

5. Check the air blowing of the taper hole in the spindle Check whether the air is normal, wipe the inner taper hole of the spindle with a clean cotton cloth, and spray light oil;

6. Clean the tool magazine arm and tool, especially the claws; 、Check whether all signal lights and abnormal warning lights are normal;

8. Check whether there is leakage in the oil pressure unit pipe;

9. Clean the machine tool after the daily work is completed work;

10. Keep the environment around the machine clean and tidy.

About the weekly maintenance method:

1. Clean the air filter of the heat exchanger, the filter of the cooling pump and the lubricating oil pump ;

2. Check whether the tool pull bolt is loose and the tool handle is clean;

3. Check whether the three-axis mechanical origin is offset;

4. Check the tool Check the movement of the tool changer arm or whether the tool magazine rotates smoothly;

5. If there is an oil cooler, check the oil cooler, and if it is lower than the mark, please add oil cooler in time;

6. Clean the impurities and water in the compressed gas, check the oil amount in the oil mist separator, check whether the solenoid valves of each circuit are working normally, and check the tightness in the pneumatic system, because the gas circuit system is good or bad It directly affects the tool change and lubrication system;

7. Prevent dust and dirt from entering the inside of the numerical control device. There are generally oil mist, dust and even metal powder in the air of the machining workshop. Once they fall on the circuit board or electronic device in the CNC system, it is easy to cause the insulation resistance between components to drop, and even lead to damage to components and circuit boards. .

About the monthly maintenance method:

1. Check the lubrication of the shaft track, the track surface must be well lubricated;

2. Check and clean the limit switch and bump block;

3. Check whether the oil in the oil cup of the punching cylinder is sufficient, and if it is insufficient, add it in time;

4. Check the machine Whether the signs and warning nameplates are clear and exist.

About the maintenance method every six months:

1. Disassemble the shaft chip guard, clean the shaft oil pipe joint, and the ball lead screw , three-axis limit switch, and check whether it is normal. Check whether the effect of the hard rail wiper blades of each axis is good;

2. Check whether the servo motor and head of each axis are running normally and whether there is any abnormal sound;

3. Replace the oil pressure Unit oil, tool magazine deceleration mechanism oil;

4. Test the clearance of each axis, and adjust the compensation amount if necessary;

5. Clean the dust in the electric box (make sure the machine tool is turned off down);

6. Comprehensively check whether all contacts, connectors, sockets and switches are normal;

7. Check whether all keys are sensitive and normal;

8. Check and adjust the mechanical level;

9. Clean the cutting water tank and replace the cutting fluid.

To sum up, as long as we carefully maintain the machine tool in the CNC machining center, we can maintain the long-term stability of the machining accuracy of the machine tool and prolong the service life of the machine tool. This work must be highly valued and executed from the management level of the factory!

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