In this study, the effects of cutting edge geometry, workpiece hardness, feed rate and cutting speed on surface roughness and resultant forces in the finish hard turning of AISI H13 steel were experimentally investigated. Cubic boron nitrite inserts with two distinct edge preparations and throughhardened AISI H13 steel bars were used. Four-factor (hardness, edge geometry, feed rate and cutting ...

The development of new cutting tool materials during the last few years is based mainly on submicron hardmetal substrates as well as on new PVD and CVD coatings. The development of submicron and nanopowders with higher strength and higher fracture toughness solves problems in machining high-temp alloys, hard materials, and in dry cutting. Based on physical models used to calculate stress in the...

Purpose: The objective of the researches presented in the paper is to investigate, in laboratory conditions, the application possibilities of the proposed system for tool wear monitoring in hard turning, using modern tools and artificial intelligence (AI) methods. Design/methodology/approach: On the basic theoretical principles and the use of computing methods of simulation and neural network t...

Now a days the general manufacturing problem can be described as the achievement of a predefined product quality with given equipment, cost and time constraints. There is a rapid development in the quality of advanced aero space materials like aluminum and its alloys with improved properties. The difficulties in machining of these materials economically and effectively are limiting their applic...

In this study, a hybrid DC-DC boost converter was proposed for high voltage gain. The analyzed and designed. active soft switching method applied to reduce the losses due hard switching. While main switch of is turning off, current zero during transition in opposite case, transition. Thus, power both states were minimized. simulation MOSFET IGBT based with obtained different loads.

In this paper, we introduce a procedure to formulate and solve optimization problems for multiple and conflicting objectives that may exist in turning processes. Advanced turning processes, such as hard turning, demand the use of advanced tools with specially prepared cutting edges. It is also evident from a large number of experimental works that the tool geometry and selected machining parame...

In machining automotive industrial parts by hard procedures, the topographic characteristics of high accuracy surfaces have importance. this paper 2D and 3D surface roughness features gear bores machined turning grinding are demonstrated. The parameters, which considered as more exact than were compared to ones, used widely in practice. analyzed procedure versions ranked based on parameters det...