Application of electroslag surfacing for manufacture of hammers of impact shocking mechanism of electrofilters sedimenting electrodes

The article presents the basic data on technological capabilities of the production of parts for the shocking mechanism of shaking the precipitating electrodes of electrostatic precipitators. The prospect of changing the manufacturing process of the hammer of impact mechanism in order to maximize the efficiency of electrostatic precipitator while simultaneously increasing the operational reliability of hammers and reducing the cost of their production is proposed and analytically substantiated. It is established that the process of making a hammer can be practically reduced to one operation – electroslag surfacing. In this case, for original workpieces (a shank and consumable electrode), standard steels of a standard assortment are used. As a result of studying the quality of metal of the welded shock part of a hammer it is established that the process of electroslag surfacing provides the formation of monolithic and defect-free structure; the microstructure of welded metal is ferritepearlite one, rather homogeneous and dispersed, which is typical for cast metal in a water-cooled mold. Impact tests of hammers obtained using electroslag surfacing were carried out on a specially designed impact stand, which provides energy-kinematic parameters of hammer impact on a shaking beam similar to an industrial electrostatic precipitator. The tests have shown their high reliability (there was no damage) and thus confirmed the possibility of their industrial use. The calculated expected economic effect from the use of electroslag surfacing technology in the manufacture of hammers of the percussion shaking mechanism relative to the developed design of the hammer was about 350–400 UAH per piece. The results obtained in the work can be used in production, in the design of technological processes for the manufacture of parts with a complex manufacturing process

electroslag surfacing; hammer; precipitating electrode; non-metallic inclusions; reliability