Abstract
The “virtual pole” method allows profiling of the cutting tools that generate by rolling. This mode of generation is advantageous in terms of the accuracy of the geometric shape obtained. The mentioned method combines the analytical accuracy of profiling with a simplified calculation mode, compared to the established algorithms. The paper presents an application made on the basis of the “virtual pole” method, for the profiling of the gear shaped tool, designed to generate the bore of a bush with a K-profile. Based on this methodology, in house software was developed for the type of profile mentioned above. The program allows the numerical and graphical representation of the profile to be generated, the contact curve and the profile of the generating tool.
Highlights
The processing of the bores profiled by generating, by the rolling method, has the advantage of a good precision of the shape of the surface to be obtained
One of the classic methods of obtaining the profiled bores is the processing with gear shaped cutter tools
The “virtual pole” method is based on the observation that, in the case of tools that generate by rolling, the enwrapping condition can be defined by identifying a „virtual pole” of gearing
Summary
The processing of the bores profiled by generating, by the rolling method, has the advantage of a good precision of the shape of the surface to be obtained For this type of generating, the primary peripheral surface of the generating tool and the generated surface are reciprocally enveloping surfaces. This determines that the surface to be obtained is generated by a large number of cuts and, between the contour of this surface and the profile of the generating tool, to be a relative sliding. Polygonal profiles can have a wide variety of shapes, given their number of lobes, but those with three lobes (P3G) and four lobes (P4G) are standardized [3, 5]
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