Abstract
The history of application of vibratory devices for the processing of metal waste is considered. The report demonstrates the possibility of grinding metal waste generated in metalworking production on the example of iron-nickel and steel chips and of subsequent production of metal powders for additive manufacturing using the vibratory disintegration method. For the first time, the dependences of the main indicators of vibratory grinding of metal shavings on the degree of its mechanical processing were established, which made it possible to determine the specific energy consumption for the production of the required size classes. The regularities between the time spent on crushing metal shavings and power consumption during crushing are determined, which allows to detect the close relationship between energy consumption parameters and the physicomechanical properties of the chip, which makes it possible in the future to carry out a more detailed correlation of its physical and mechanical properties during disintegration.
Highlights
With the increasing demand for additive manufacturing, the market for raw materials used in the manufacture of metal powders directly applied in 3D printing is growing
For the purpose of the research, Mekhanobr-Tekhnika REC developed a special vibratory disintegration process flow diagram that includes crushing of the initial chips to the particle size
A schematic flow diagram for vibratory disintegration was developed and preliminary studies were conducted to grind metal chips made of high alloys from their original size to the particle size less than 0.125 mm using vibratory crushing, grinding and screening equipment
Summary
With the increasing demand for additive manufacturing, the market for raw materials used in the manufacture of metal powders directly applied in 3D printing is growing. It is possible to reuse the waste generated in metalworking of aviation and aerospace parts The advantage of such wastes is due to the composition of the initial alloys used for manufacturing the parts: they possess the required physical properties and correspond to all technical regulations of the priority industries. Mechanical grinding of the feed material in vibrating or rotating ball mills is the most widely applied method for production powder. In almost all traditional devices used in the world, the load application is concentrated, and the application area and magnitude are random. In these conditions, random destruction of the crystal blocks is observed, which depends little on the defects in their structure. Certain consideration is given to the search for methods to establish physical and mechanical properties of metal chips that would enable indirect identification of the hardness, elasticity and destructibility of any metal
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