Influence of end cutting edge angle of a multi-point lathe cutter on the thread profile accuracy. Theoretical investigation

Abstract Modern manufacturers of tools for turning threads make them with a non-zero value the side rake angle cutting edge, which significantly increases their efficiency. The this is approximately equal to thread lead angle. However, today there lack theoretical research that would provide an algorithm calculating effect edge on one indicators accuracy - pitch diameter. Its particularly noticeable large and relatively small diameter such as drill string tool-joint thread. Theoretical studies show possibility ensuring required without changing profile lathe tool.