Abstract
Three-dimensional geometric modeling of the forming process of cylindrical parts during grinding with crossed axes of it and the wheel has been carried out. Grinding of shafts, which are widely used in the automotive industry, machine tool industry, and rolls of strip rolling mills has been carried out at one location with a wide abrasive wheel oriented relative to the workpiece. Based on the obtained spatial model of shaping and removal of the allowance, the distribution of the allowance along the cutting area of the tool during grinding with an oriented tool has been studied. It has been shown that on the peripheral cutting section of the grinding wheel, roughing, finishing and calibration are combined.A modular three-dimensional model of dressing the grinding wheel peripheral section with a single-chip diamond tool during grinding with crossed axes of the tool and part using standardized modules of the dressing tool, orientation and shaping has been developed. Based on the presented model, the geometric accuracy of the tool peripheral section shaping after its dressing has been studied. Based on the presented model, the geometric accuracy of the tool peripheral section shaping after its dressing has been studied. In order to obtain the necessary microgeometry and cutting properties of abrasive wheels, in accordance with the features of processing the rolls of strip rolling mills with an oriented tool, dressing with a reduced feed rate of the dressing tool to the calibration section is proposed. The feed rate of the dressing single-chip tool depends on the value of allowance. Different feed rates of the dressing tool provide different development of the tool cutting peripheral section. This, in turn, increases the intervals between dressing processes of the grinding wheel, which operates in the blunt mode. Therefore, the resistance is increased, and the cost of processing is reduced. Implementation of the proposed method of wheel dressing during single-pass grinding with crossed axes of the tool and cylindrical part will provide high accuracy, quality of the machined surfaces, and also significantly increase the efficiency and productivity of processing. The developed dressing method can be applied for round grinding processes with crossed axes of the workpiece and abrasive wheels
Highlights
In the conditions of the formation of a new type of eco nomy [1], a special role is played by the machine-building industry, which ensures the economic growth of the country and increases its international competitiveness
Investigations of the grinding method of cylindrical parts by the oriented tool periphery, which have been conducted on the basis of spatial models of the wheel, roller, processes of allowance removal and shaping, showed the possibility of allowance uniform reduction to the finishing and calibration areas along the cutting surface
This increases the accuracy to IT 6-7 and processing performance by dividing the tool periphery into rough, finishing and calibration areas
Summary
In the conditions of the formation of a new type of eco nomy [1], a special role is played by the machine-building industry, which ensures the economic growth of the country and increases its international competitiveness. The use of the grinding method with crossed axes of the wheel and part makes it possible to fix the abrasive tool forming part This ensures an even distribution of the allowance along the profile of the wheel, its more uniform wear and increases the processing productivity. The development and study of spatial models of tool surface dressing in circular grinding with crossed axes of the wheel and cylindrical part is an urgent task. Because it will increase processing productivity, product accuracy and tool stability and ensure high competitiveness in various fields of mechanical engineering
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