Methods of determining the diameter of the mandrel with a given outer diameter of the spring and wire diameter using Rm-functions
Modern springs manufacture hasn’t methods with sufficient quality, possible to calculate real residual deformation of the wire and the actual dimensions of the spring after coiling. In this regard, currently in the process of production for each coil of spring work-hardened and tempered has to prepare trial lots coil springs. Taken a kind of «basic» value permanent deformation for basic springs’ nomenclature manufactured on this production. During repeat tests for each part individually, value of this deformation is adjusted for each type of spring configuration. To solve this problem was offered method allows to simplify and summarize formulas. Simplification will consist is that all parameters can be arranged in a constant independent parameters that define dimension calculated values and their absolute values in the limit elastic deformation. Commonality of formulas will be reached through the use of these calculated parameters such that are in the plastic region are universal for all materials and all methods of deformation.