Vibration and precision of the details machining

The results of theoretical and experimental researches of vibration processes during boring of the constructional steels stock are stated in this paper. The new design of the boring bar is offered with the purpose of high technology introduction in manufacture of the mechanical and space engineering products. The design of assembling boring bar reduces the vibration amplitude at the expense of the increased stiffness both amplified damping of cross and angular fluctuations. It is provided with displacement of the mass centre of bar to an edge of a replaceable hard alloy metal plate and filling of the "weighted" bar part by the powder raised density material. The rubber packing (soft and hard) provides regular viscosity. It promotes partial restriction of the flow density of the itinerant valence electrons thermo-EMF during cutting from the technological machine through the cutting tool on preparation or in other situations in the opposite direction and stimulates the resistance to cutting reduction. The internuclear interactions in the preparation material at cutting, which are estimated by size by chemical metal connection, do not exceed 90 kJ/mol. The experimental researches of vibration amplitudes and work ability of new boring bar in the process precision boring of a steel pipe (30HGSA) demonstrate reduction of vibrational acceleration amplitude in 3 times in comparison with a typical boring bar design and improvement of roughness - in 1,85 times. Partially the results of work are used at the base enterprise for production details for oil industry equipment.