Contributions on the Influence of the Cutting Parameters and Constructive Geometrical Parameters of the Tool on the Precision of the Worm Gears Manufactured Using Whirling Thread Cutting

Abstract

ProblemThe whirling cutting is considered as the most productive method of manufacturing the worm gearing. In the case of up cutting manufacturing, where the tool and the worm gearing are spinning in the cutting area in the same direction, the thickness of the chips is increasing from the value zero to the maximum value, with a significant gradient. This fact has a negative effect on the tool face of the cutting tool, because it generates an accelerated wearing of this face, despite the major wear is on the side face of the tool. It is important to discover the influence of the parameters of the tool in the whirling cutting process.MethodThe precision parameters which were measured at the manufactured worm gearing were the tooth radial run out, frr, the error from the constancy of the worm pitch, fpxr, the profile error, fflr, and the minimal error of the thickness of the worm gearing thread, Ess.ResultsThe thickness of the manufactured tooth depends on the precision of settling the cutting depth that is, on its turn, dependent of the precision of the lathe carrier positioning in the transversal direction. It is hard to obtain a perfect settling of the initial cutting depth by using the method of first touch the cutting edges that are rotating continuously with the piece.