Service life

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Service life is understood to mean

  • for tools or similar the time in which you can work with these without interruption until significant signs of wear and tear appear, which require renewal, overhaul, replacement or the like. require.
  • in the case of machines and technical systems, the time during which the machine or system is used for maintenance , cleaning, etc. cannot work, so stands still.

In the production technology the prior time  T in addition to the prior volume  V used for the sag resistance of a tool material to characterize combination (active pair). The standing time or the standing volume are referred to as standing sizes. When determining stand sizes, the stand conditions, such as B. the tool geometry, the cutting material or the material can be specified. Furthermore, it is necessary to specify the standing criteria (wear mark width, scour depth, ...) for which the standing size is specified.

In the DIN standard  6583, the stability is defined as "[...] the ability of an active pair (tool and workpiece) to endure a certain machining process ". The tool life can thus be described as the period of time in which a tool is able to machine a workpiece.

The wear mark width VB , the crater depth  KT or the crater center distance  KM are used as measurable values ​​on the tool for service life  criteria, for which a certain limit value is provided, upon which the tool is considered worn . The standing conditions represent the parameters under which machining takes place. The cutting speed  v c is used here . Carrying out a wear service life turning test is standardized according to ISO  3685.

The service life of a catalyst is the length of time it can be used by the user, during which it can be operated economically with sufficient activity and selectivity .

Tool life when machining

Individual evidence

  1. Duden , standing time
  2. DIN 6583 , 1981, p. 1