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Faults and classification of CNC machine tools

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  • Time of issue:2015-01-31 00:00

Faults and classification of CNC machine tools

  • Origin:
  • Time of issue:2015-01-31 00:00

  The loss of all or part of the specified functions of the CNC machine tool is called the failure of the CNC machine tool. The failure rate of CNC machine tools changes significantly with the passage of time. Because the shape of the typical failure curve is similar to the bathtub, it is called the bathtub curve or the machine tool failure rate curve, and it is divided into three stages. The first stage is the initial operation area, the curve is negative exponential, and the failure rate of the machine tool is high: the uth stage is the effective life area of ​​the system, and the general CNC machine tool can enter the effective life area after 9-14 months of operation, so the general CNC machine tool The warranty period is about 1 year. Machine tools entering the effective life area have a very low failure rate; the IQ stage is the aging area of ​​CNC machine tools, and the failure rate of the system rises sharply with time during this period. This curve helps us understand and analyze the failures of CNC machine tools. CNC machine tools are the product of mechatronics, with advanced technology and complex structure. The failures of CNC machine tools are also various, and the causes of failures are generally more complicated, which brings many difficulties to the fault diagnosis and maintenance of CNC machine tools. In order to facilitate the failure analysis and diagnosis of the machine tool, this section roughly divides the failures of CNC machine tools into several categories according to the nature of the failure, the cause of the failure and the location of the failure.

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