期刊名称：Eastern-European Journal of Enterprise Technologies
印刷版ISSN：1729-3774
电子版ISSN：1729-4061
出版年度：2017
卷号：1
期号：1
页码：4-9
DOI：10.15587/1729-4061.2017.92256
语种：English
出版社：PC Technology Center
摘要：We examined methods of manufacturing profile openings on the metal-cutting machines by the rotational broaching method. Based on the generalized results of analysis of the methods for manufacturing profile openings, we proposed a method of rotational broaching. Bits for drilling machines or screwdrivers are used as the tool. Hardness of the bit is quite high; therefore, making a centering opening in it is difficult. The problem is solved by pressing a transition bushing onto the bit, with a centering opening made in advance. Implementation of the method requires a Morse cone with a welded plate. This allows fixing the rotating centre in a tool carrier. The proposed method makes it possible at minimal financial cost to perform the shaping of profile openings within a wide range of both the shape and nominal dimensions. The method is based on the effect of self-centering and, therefore, does not require preliminary adjustment. Adjusting tool entrance angle is achieved by displacing a transverse support of the lathe and by tool carrier rotation. In addition, in the production of profile opening, its input cone is formed, which provides for easy installation of the wrench to transmit rotational moment without losing load capacity. The studies conducted defined suboptimal values of the input variables that are accepted as rational in the examined technological process of rotational broaching. These are: a tool entrance angle (1.5...2.5 degrees), its supply (0.1...0.3 mm/rev) and the rate of processing (15...25 m/min).
