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.
Tool life when machining
- Duden , standing time
- DIN 6583 , 1981, p. 1