Geometriska avvikelser på skär, för skärande bearbetning.

Sammanfattning: The quality of a product is an important factorto establish and preserve a sustainable market- and business position in theglobal business environment. Measuring techniques and quality management has astrong correlation. To ensure the functionality of a product, there are needsto measure the product towards specific limitations. Mathematical modeling is away of visualizing a process capability, and its parameters. Sandvik Coromantin Gimo are producing different types of face milling cutters. The company hasa hypothesis about one of its carbide inserts, and its geometrical specificationlimits. The hypothesis is that different geometrical deviations affect themilling cuts edges in different ways, when it is applied and installed in themilling cutter body. The purpose is to develop a mathematical model, which canshow what changes affects the most, which will lead to less waste in theproduction process, by predicting the actual position of the cut in the millingcutter body. The method is based on relevant literature in the main areas ofmeasuring methods and its techniques and statistics. This theory, incombination with the method, is a profound base in the development of themathematical model, and analysis of the cuts. The geometrical deviations weremeasured by using three different measuring methods. This had to be done in orderto verify the mathematical model and its theoretical output, and then compareit to the actual measured data. The result of the study was the development ofa mathematical model, and the analysis of 4000 individual measurements. Theconclusion of the analysis is that certain geometrical deviations are affectingthe position of the milling cuts edges more than others. By using themathematical model, the simulation output will show a theoretical value of themilling cuts geometry, and make it possible to predict the milling cutsdimensional deviation. The mathematical model is validated, based on three mainfactors. These are Gauge Repeatability and Reproducibility, statisticalevaluation, and the development of the mathematical model itself. There are manyparameters affecting the milling cuts geometry, and the mathematical modelshould not be used as the only source of verifying the cut, but rather as acomplementary tool that makes a qualified prediction.