Mechanized processing of building equipment by abrasive working bodies

Abstract

Carrying out of the clearing operations at carrying out mechanized processing of construction equipment from paints and varnishes, rust, various kinds of pollution belongs to mass labour-consuming operations [1]. To carry out these operations, widespread use of hand-held machines, working bodies that have abrasive wheels and metal brushes. The versatility and versatility of these machines, combined with the correct selection of the desired abrasive work tool, can significantly accelerate and facilitate the performance of cleaning and grinding operations with the desired effect.
 However, most of them have drawbacks in the cleaning of thin-sheet metal, since the removal of the base metal also takes place, which in most cases is not acceptable. So when processing non-metallic materials with metal brushes the working surface is clogged with small particles of metal, which subsequently leads to the formation of rust, and when cleaning the metal surfaces grooves are formed. Metal brushes are also ineffective in cleaning surfaces of synthetic enamels, curvilinear surfaces and inaccessible areas. Machining these tools is energy-intensive and requires the use of heavy-duty hand machines. Fiber and petal abrasive tools are not self-cleaning and lose their cutting power due to the filling of the intergranular space with cleaning waste. Sand blasting is environmentally hazardous for workers and the environment, since the sand consumables fly over long enough distances (especially when clearing tall structures and structures).
 The analysis showed that one of the effective tools for cleaning metal and non-metal surfaces from paint coatings, rust and other contaminants without removing the base material layer is a polymer-abrasive brush. However, there is insufficient research on the mechanism of its operation, energy and thermal processes that occur during operation and have a decisive influence on the performance of the polymer-abrasive brush.
 The results of studies of the influence of structural and mode parameters of manual angle grinders with polymer-abrasive brushes are presented in the paper. The study of these issues is an urgent task, as it will allow to determine the parameters of the drive machine, rational modes and schemes of their operation, as well as the scope of use of such working bodies.