The spot inspection of CNC machine tools is the basis for carrying out condition monitoring and fault diagnosis, which mainly includes the following contents:

①fixed point. First of all, it is necessary to determine how many maintenance points a CNC machine tool has, scientifically analyze the equipment, and identify the parts that may fail. As long as these maintenance points are "watched", faults will be found in time.

②target. For each maintenance point of the boat, it is necessary to formulate standards one by one, such as clearance, temperature, pressure, flow, tightness, etc., there must be clear quantitative standards, as long as the specified standards are not exceeded, it is not a failure.

③regular. How often to check, to set the check cycle. Some points may need to be checked several times in the boat class, and some points may be checked once or once a month, which should be determined according to the specific situation.

④item. What items are checked at each maintenance point should also be clearly defined. The boat point may check one item, and may also check the child item.

⑤Set people. Who will carry out the inspection, whether it is the operator, maintenance personnel or technical personnel, should be implemented according to the inspection parts of the CNC machine tool and the technical accuracy requirements.

⑥statute. There are also regulations on how to check, whether it is manual observation or instrument measurement, and whether to use ordinary instruments or precision instruments.

⑦Inspection of. The environment and steps of the inspection should be specified, whether the inspection should be performed during production operation or shut down, and whether it should be disassembled or not.

⑧Record. The inspection should be recorded in detail and filled in clearly according to the prescribed format. The inspection data and the difference between the inspection data and the prescribed standard, the judgment impression and the handling opinion should be filled in. The inspector should sign and indicate the inspection time.

⑨deal with. If the inspection can be processed and adjusted in the middle, it should be processed and adjusted in time, and the processing results should be recorded in the processing records. Those who do not have the ability or conditions to deal with it should report to the relevant personnel in a timely manner and arrange for treatment. However, anyone and any time processing must fill in the processing record.

⑩analyze. The inspection records and processing records should be systematically analyzed regularly to find out the weak "maintenance points". That is, the points with high failure rate or the links with large losses, put forward opinions, and submit them to the designers for improvement. The spot inspection of CNC machine tools can be divided into two levels: daily spot inspection and full-time spot inspection. The daily inspection is responsible for spot inspection, processing and inspection of the general parts of the machine tool. Full-time spot inspection is responsible for key spot inspection of key parts and important components of the machine tool and equipment condition monitoring and fault diagnosis according to the cycle, formulate spot inspection plan, make diagnosis records, analyze maintenance results, and put forward suggestions for improving equipment maintenance management. personnel. As a work system, the spot inspection of CNC machine tools must be implemented conscientiously and persistently to ensure the normal operation of the machine tools.