Optimization of Requirements for Accuracy of Base Surfaces for Spur and Helical Gearwheels at Their Tooth Cutting

Abstract

The paper describes the character of the joint influence of errors for base surfaces for blanks of spur and helical gearwheels (mounting bore and rim face end) on the position of the blank at tooth cutting. Possible versions of gearwheel blank mounting at tooth cutting are considered. It is shown that implementation of this or that version at tooth cutting is of a random character. The following issues are substantiated: the important role of the influence of the blank mounting error for providing accuracy parameters of teeth at their cutting; the necessity of applying statistical methods for the experimental study of the mutual relations between errors of blank bases and accuracy parameters of teeth at their cutting. A technique for such investigation is proposed and investigation results are presented for a wide range of conditions of gear machining. Techniques for preliminary choice and optimization of requirements for accuracy of base surfaces of spur and helical gearwheel blanks before their tooth cutting are described. These requirements provide the necessary accuracy of teeth at the assigned conditions of gear machining.