Grinding of aluminum alloy panels after shot peen forming on contact type installations

Abstract

Absract One of the key technological processes of production of the airframe of an aircraft is the manufacture of large-sized contour forming details such as “panel” and “fuselage shell”. To date, the most promising method of obtaining the required aerodynamic shape of such parts is the method of shot peen forming. It consists of processing the outer surface of a part with a stream of fast-moving shots, because of which a specific profile of micro roughness stays on the surface, characterized by numerous prints of fraction of different diameter and depth [1-5]. The grinding of the flap wheel is part of the forming process and improve the quality of the original surface. For the formation of large-sized surfaces, the scientists of INRTU have developed and introduced in the conditions of the Irkutsk aviation plant a unique installation for the shot peen forming– grinding of UDF-4 with CNC system [6, 7]. The primary, and the main difference of domestic development from foreign counterparts, is the division of the forming operation into smaller stages for easier process control. The development and improvement of grinding technology requires the development of appropriate methods and special software for it, which enables to automate the processing process.

Control of Deformation of Elastic Polymer-Abrasive Circles at their Wear

“…Machining methods, such as grinding, polishing, volumetric vibration machining, etc., are very effective ways to solve the problem of surface grinding. The works of many scientific teams are devoted to the study of these abrasive processing methods, for example [4,5,6,7].…”

Determination of the Shot Fractional Composition During Shock Hardening Methods Using Technical Vision

“…В результате обработки дробью обеспечивается повышение сопротивляемости материала детали усталостному разрушению и коррозионным повреждениям за счет наведения в поверхностном слое материала остаточных сжимающих макронапряжений, а также повышение микротвердости, снижение значений шероховатости и улучшение микрогеометрии поверхностного слоя [3][4][5]. Шероховатость обработанной поверхности зависит от размера дроби и первоначального значения шероховатости до обработки.…”

Improving the Efficiency of Machine Grinding of Double Curvature Surfaces with a Profiled Flap Wheel

“…Grinding with an abrasive flap wheel after shot peening is an obligatory part of the technological process of forming long-sized large-sized surfaces such as panel and sheath. It is carried out in order to improve the quality of the initial surface obtained after shot peen forming [1][2][3][4][5][6][7][8][9][10][11][12].…”

“…To realize this technology in production conditions at the Irkutsk Aviation Plant, Irkutsk National Research Technical University designed and implemented a universal special device UDF-4 with CNC (shot peen forming device 4th version of modernization). To expand the technological capabilities for grinding operations, the last version of this device is equipped with a four-position revolver head with an additional rotation axis to the processing surface [4,5]. The creation of the specialized CNC equipment for grinding required the systematization of the available information about grinding with flap wheels and the construction of the technological process of grinding on automated equipment.…”