DESIGN THEORY, DESIGN PROCEDURE FOR OUTPUT OF CONTOUR WORKING OF PARTS OF DIVERSE ACCURACY WITH NUMERICALLY-CONTROLLED LATHES AND WITH SUCH MILLING MACHINES

There the purposes are to develop the theory and the procedure for the design of output of working of parts of diverse accuracy, to create the refernece basis to design the processes. The design theory of output of working of parts with the Numerically-Controlled Machines (NCM), which was based on the open mechanisms of change of power load of production system, has been developed. The new general machine-building standards for the cutting modes, the Computer-Aided Design System of Processes for the NCM have been developed and are introducedAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio

A Study on the Machinability of Steels and Alloys to Develop Recommendations for Setting Tool Performance Characteristics and Belt Grinding Modes

This article presents a methodology for designing belt grinding operations with grinding and lapping machines. It provides the results of a study on the machinability of various steels and alloys with belt grinding, which are then classified according to an indicator that we have developed. Namely, cast aluminum alloys, structural alloy steels, structural carbon steels, corrosion-resistant and heat-resistant stainless steels, and heat-resistant nickel alloys have been investigated. The machinability index is the ratio of the performance indicators of the grinding belt and the depth of cut to the indicators of grade 45 structural carbon steels (similar to steel AISI 1045) and similar steels and alloys. The performance indicators of the grinding belt are chosen from a set of calculated and estimated indicators. Experimentally determining the dependences of the performance indicators on the belt grinding modes and conditions, taking into account the established levels of machinability, allowed us to develop recommendations for designing belt grinding operations with grinding and lapping machines. The proposed methodology for designing belt grinding operations guarantees optimal performance and ensures that the necessary quality of the machinable surfaces is achieved. At the same time, it takes into account variable machining conditions, which change within specified limits