Brief analysis of machining failure of die casting cnc

- Aug 20, 2018 -

The service life of CNC machine tools is divided into three phases, namely, early failure period, accidental failure period and loss failure period.

    In the early failure period, the failure rate of the machine tool is very high, but as the running time increases, the failure rate is quickly reduced and enters a constant failure rate. There are many reasons for the high early failure rate, such as design defects, manufacturing and installation errors, hardware parts processing operations and errors in use. After running and running to find out the cause of the fault and eliminate it, the failure rate will gradually stabilize. This stage is called the trial run period or the run-in period. The early failure period occurs not only at the beginning of the new machine tool, but also when the machine parts are repaired or replaced and put back into service.

    The occasional failure period is also called the effective failure period, and the failure rate is the lowest and the failure rate is constant. Under normal circumstances, this stage is not supposed to be faulty. It is the best working period for die casting cnc processing. However, due to improper use, operational errors or other accidental causes, some malfunctions may also occur. In addition, if some components are designed with a small safety factor and the upper limit of the load is encountered during use, it may be damaged due to overload and malfunction. Therefore, in the occasional failure stage, special attention should be paid to rational use, maintenance should be strengthened, operational errors should be avoided, and the effective life of the machine tool should be extended as much as possible.

    After entering the die casting loss period of the die casting, the failure rate is increased again due to the normal wear and tear of the machine parts, chemical corrosion, physical and electrical performance changes, and fatigue of the material. For CNC machine tools, if you can use various diagnostic techniques to master the loss law of components, you can control the occurrence of loss faults by taking corresponding maintenance or replacement measures before the components enter their fault loss period, thus extending the NC machining of the equipment. Actual life.


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