Abstract
This paper presents the results obtained in comparative grinding studies of alloy metal chips using a ball mill and a vibrating mill. A comparison of the effective viscosity, bulk and tapped density in narrow size classes demonstrated higher rheological properties of the vibration grinding product and significant differences in the distribution of indicators by the size classes, depending on the grinding method. The specific yield and energy consumption indicators were established, which confirmed the superiority of vibration grinding over ball mill grinding. A visual assessment of the shape and surface condition of the ground particles is presented, conducted using a scanning electron microscope.
Highlights
The applications of powder materials and their global usage are growing annually, which is further facilitated by the development of additive manufacturing in mechanical engineering
The waste generated in machining applications is an immense source of raw materials for manufacturing metal powders
Mechanical treatment will be the best method of obtaining powders, ensures the transformation of the initial material into powder without any significant changes in its chemical composition
Summary
The applications of powder materials and their global usage are growing annually, which is further facilitated by the development of additive manufacturing in mechanical engineering. This waste is usually generated in the manufacture of critical parts and contains valuable alloying components [5, 6] For such raw materials, mechanical treatment will be the best method of obtaining powders, ensures the transformation of the initial material into powder without any significant changes in its chemical composition. In the case of a traditional ball mill, the impact intensity of the grinding medium is structurally limited by the so-called “critical” rotation speed, at which the centrifugal forces start pressing the grinding medium to the drum These restrictions limit the specific performance of ball mills, which leads to a significant increase in energy consumption in the case of metal and alloy grinding and supports the feasibility of using more energy-efficient and energy-intensive devices. A better understanding of the physical fracturing processes in vibration grinding and their differences from the fracturing processes in traditional ball mill grinding required further research into the structure and properties of particles by various size fractions, following their comparative disintegration in these devices
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