In this thesis we have investigated influence of lubrication on the quality of the manufactured stator segment. In the theoretical part, we touched the basics of the entire process of cutting and lubrication of sheet metal during stamping. In the experimental part we have wanted to find out, how adding of different amounts of lubricant on the sheet metal during stamping process affects on the size of preasure stability and the size of pull off force. Preasure stability was measured with the compression test and pull off force was measured with the tensile test. We have compared how the amount of lubricant added, the depth of interlocking clips and the modified braking force in the tool affects the size of preasure stability of stator segment. Besides we have also observed how lubricant affects on corrosion and the accumulation of lacquer on the tool. We came to the conclusion that adding of a lubricant has a small effect on the size of preasure stability compared to different depth of interlocking clips and a correction to the braking force. We also came to conclusion that adding of a lubricant protects the stator segment from corrosion and that the lubricant carries away the chipped sheet lacquer from the tool.
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