Calculating the profile of intermittent grinding wheel for the sharpening teeth of the broach

Abstract

The article shows that during the grinding of complex profile blades of metal cutting tools from tool steels, unfavorable thermodynamic conditions are created in the cutting zone and, as a result, grinding burns and cracks occur on the surface of the polished workpiece. One of the methods of controlling the temperature in the cutting zone at the final grinding operations is the use of grinding wheels with a discontinuous surface. The method of calculating the profile of the discontinuous surface of the grinding wheel presented in the article makes it possible to determine its geometric parameters taking into account the wear resistance of the grinding wheel and the heat stress of the process of treatment. The results of the verification of the proposed technique in the production conditions are given which showed that the treatment of the teeth of the broaches with a grinding wheel with a discontinuous profile, in comparison with the machining of broaches according to the traditional technology, provides a higher quality of blade surfaces, while the process productivity, compared with the factory technology, increased by 20...26%.

Simulation of the contact temperature in the cylindrical plunge grinding process

“…In paper [36] by authors was proposed improvement the contact performance properties, by submitting presentation of optimization of flat grinding of titanium parts by following two parameters: the relative bearing length of the profile and the relative bearing part of the parts' surface that allow assessing the quality of the surface at the microand macro-scale. The Bogutsky, V. and all shown that during the grinding of complex profile blades of metal cutting tools from tool steels, unfavorable thermodynamic conditions are created in the cutting zone and, as a result, grinding burns and cracks occur on the surface of the polished workpiece [37]. The method of calculating the profile of the discontinuous surface of the grinding wheel presented in the article makes it possible to determine its geometric parameters taking into account the wear resistance of the grinding wheel and the heat stress of the process of treatment [37].…”

“…The Bogutsky, V. and all shown that during the grinding of complex profile blades of metal cutting tools from tool steels, unfavorable thermodynamic conditions are created in the cutting zone and, as a result, grinding burns and cracks occur on the surface of the polished workpiece [37]. The method of calculating the profile of the discontinuous surface of the grinding wheel presented in the article makes it possible to determine its geometric parameters taking into account the wear resistance of the grinding wheel and the heat stress of the process of treatment [37]. In paper [38] a vitrified bond CBN point grinding wheel with coarse grinding area slope angle θ was presented.…”

The Influence of Abrasive Machining on the Characteristics of Surface Layers of Parts Made of Powder Materials

“…При использовании СОТС шлифовании пористых материалов наблюдается попадание ее в поры и изменение физико-химических свойств материала[3, 7, 12, 13 и др.]. Если экспериментальные исследования формирования поверхностного слоя деталей из спеченных пористых порошковых материалов на основе железа в некоторой степени освещены в литературе, то теоретические работы, направленные на прогнозирование шероховатости, образующейся при их шлифовании, практически отсутствуют, в отличие от шлифования сплошных материалов, где выполнены значительные теоретические исследования формирования микрорельефа поверхностного слоя при шлифовании[1,6,9,11,[20][21][22][23][24]. Существующие модели основываются на копировании режущего профиля абразивных зерен при формировании шероховатости детали.…”