Increase of profile grinding accuracy of high-precision nonrigid broaches on machines with CNC

摘要

Various schemes of basing of flexible high-precision flatterings at form grinding are considered. The existing technologies of form grinding of flexible fullerings allow to carry out their processing at various locating charts, such as fastening in the centers, in high-precision collet chuck attachments and in high-precision collet chuck attachments with stretching. The results of calculations which showed that the most rigid system the machine - the adaptation - the tool - the detail (MATD) is the location chart of the fullering in high-precision collet chuck attachments with stretching were received in this work. Experimental installation on the basis of the universal tool-grinding machine of the model 3A64 was developed for measurement of the size of the shift of fullering depending on the influence of radial force for confirmation of the obtained settlement data. The dynamometer, as the loading device, fixed to a column of the mechanism of vertical feed was used. The fullering was fixed in special collet chuck attachments. The calculation of the size of the deflection of the fullering depending on the loading is performed. The lunette design allowing to reduce the error of basing of the fullering is developed.