Classifying plastic beveloid gear quality considering manufacturing errors

Abstract

The usage areas of plastic gear are increasing day by day because they are light, durable, easy to manufacture, and economical. Beveloid gears can operate on intersecting or divergent axes as well as parallel axes. Another important feature is that they are suitable for backlash adjustments with cross-cone angles like (+/-). The aim of this project is to classify beveloid gear quality tables via high-accuracy quality controls for gears made of plastic material (external-external and/or external/internal) with the involute profile. Minimum deviations and distortions are allowed in the profile and lead to providing the contact ratio performance values in the gears determined by the designer. Quality classification is carried out using traditional measurement methods on the profile and leads to straight beveloid gear internal and external gear made of plastic material in a 3D printer. The quality classification of cylindrical, worm, and bevel gear types is subject to classifications included in norms such as AGMA, ISO, and DIN. Since the general quality classification for plastic gear is in the low group, the minimum acceptance criteria for quality classification are cumulative pitch, single pitch deviation, and tooth thickness fluctuations are measured to define quality classification. When the quality inspection was made, tooth thickness variability was considered by using in-house software for Beveloid gear profiles. In-house software capabilities internal and external spur/helical beveloid gear profile generating considering linear and nonlinear profile shift.