Accuracy control for products manufactured by deforming broaching
Journal Title: Metallurgical and Mining Industry - Year 2017, Vol 9, Issue 7
Abstract
This article presents the research results on the development of scientifically based technological methods for controlling the accuracy parameters of parts processed by deforming broaching. In the course of the research, we felt the necessary to systematize the main types of errors which occur during deforming broaching, and we have also developed the mathematical model of the deformation zone, determining the kinematic, geometric and energy parameters of the process. The model makes it possible to determine the patterns of plastic deformation in the areas of the deformation zone and to reveal that geometric errors appear intensively in non-contact zones of the treated hole. The change in the dimensions of the machined parts has been studied and it has defined the possible variants of axial deformations. In connection with it, the possible variations of the axial deformations within product areas have been determined along with the variations of the axial deformations which could occur with differently thickened cross sections of the products during their deformation. This, in its turn, enables the development of an analytical and experimental model with respect to the axis bending of the workpiece with different thickness under processing. The errors within the external surface of the treated parts are considered with the objective to reveal the technological factors influencing them. Based of the studies, specific technical solutions and scientifically grounded recommendations for parameters accuracy control have been developed. This permits us to obtain the necessary geometric accuracy of the products processed by deforming broaching.
Authors and Affiliations
Yakov Nemyrovskyi
Keywords
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