THEORETICAL AND EXPERIMENTAL JUSTIFICATION OF EFFECTIVE TECHNOLOGIES OF HIGH-SPEED MECHANICAL PROCESSING

Abstract

A refined mathematical model for determining the conditional cutting stress during blade processing has been developed based on the establishment of an analytical dependence for determining the conditional shear angle of the processed material. It is shown that its formation is dominated by the radial component of the cutting force, which leads to its significant decrease (by 1.5 times) compared to the calculated values obtained according to known similar relationships. This made it possible to clarify the calculation of the parameters of mechanical processing power and thermal stresses and substantiate the conditions for their reduction by reducing the intensity of friction in the cutting zone. On the basis of the conducted experimental studies of the technological operations of mechanical processing of complex-profile forming equipment for the food industry, it was established that in the conditions of blade processing, the energy intensity and the maximum cutting temperature take much lower values than during grinding. Therefore, the possibilities of increasing productivity under the conditions of ensuring high quality processing during grinding are very limited. For this, it is necessary to apply modern technologies of high-speed blade processing on high-speed CNC metal cutting machines of the "machining center" type, which, as established in the robot, are characterized by extremely high technological capabilities.