Abstract
A physical description of material grindability is proposed as a property of deformation and surface destruction of processed surface at the envelope removal. A mechanism for microchip formation is described, which consists in changing mobility of the metal being grinded in “abrasive grain -workpiece” contact, which leads to uneven removal of the energy transmitted by abrasive particle. Criteria for assessing the grindability of metals and methodology for their determination are given. In this article, we described an automated measuring complex (AMC “Grinding”), which was developed, designed and tested by us. This complex is used to solve the aim of the monitoring of grinding process at all stages of abrasive treatment and gives the opportunity to make the adjustments at all stages of the technological process, taking into account both the properties of the abrasive tool and the properties of lubricating and cooling technological means and treatment regimes. The principle of operation of an automated complex is based on statistical analysis of output energy parameters of technological equipment operation. The proposed method for evaluating grindability has been experimentally tested when grinding parts of bearings under production conditions. As a result of processing the obtained data, rational tool characteristics and grinding modes were assigned, providing the required quality indicators.
Highlights
Significant advances in creation of new materials with high values of hardness, modulus of elasticity, melting temperature, wear resistance, low values of linear expansion coefficient, compressibility, thermal conductivity, latent heat served as the basis for manufacture of machine parts operated under extreme conditions
With the general trend in machine building to reduce the amount of blade processing to remove significant envelopes, use of high-alloyed and heat-resistant steels and alloys, technical ceramics, the volume of application of abrasive operations increases [1]
The author [2] formalized a complex of technological constraints and control parameters, which made it possible to bring the concept of technological processibility to a mathematical description
Summary
Significant advances in creation of new materials with high values of hardness, modulus of elasticity, melting temperature, wear resistance, low values of linear expansion coefficient, compressibility, thermal conductivity, latent heat served as the basis for manufacture of machine parts operated under extreme conditions. As a criterion characterizing the process of abrasive dispersion of workpiece surface, directly related to surface strength and metal destruction, it was proposed to use specific fracture work, defined as the ratio of work expended on removing the envelope [3] to the volume of material being dispersed.
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