In diploma thesis, turning is theoretically presented. This is followed by a presentation of the experimental site and technological process. Two operations, rough and fine internal turning, are introduced for the purpose of improving production productivity. Three suitable cutting tools from different manufacturers are selected for each operation and preparation for their testing is carried out. Technological windows of cutting tools, which define a common technological window for an individual operation, are used. The common technological windows are divided into three points. The basic goal of productivity is pursued, three hundred pieces in eight hours (in one shift), without tool changes. Threshold values for acceptable processing of the workpiece are set for each operation. For rough internal turning, this is the Z-axis load, and for fine internal turning, the surface roughness. In the stage of the rough internal turning, productivity is achieved with the middle point of the common technological window, but the maximum point of the common technological window does not bring the desired productivity. In the fine internal turning, the desired productivity with two tools is already achieved at the maximum point of the common technological window. The cost analysis of both operations shows that the cheapest tool is also the most productive. The results obtained in the testing phase are confirmed by the confirmation test.
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