Abrasive processing mechanization of parts from polymeric composite materials for paste operation

Introduction. The development of the final abrasive processing of parts from polymeric composite materials with the use of the flexible grinding tool is considered. The research objective is to reduce the processing time through displacement of human labour by mechanized work, as well as to improve the treated surface quality. Materials and Methods. The method of surface preparation of parts made of polymeric composite materials (PCM) is used for gluing through the mechanical abrasive treatment with a flexible grinding tool. Research Results. Characteristic features of forming the surface microprofile of GRP parts after treatment with a flexible abrasive tool by hand and mechanical methods are analyzed. Need for mechanization of the given operation is determined and validated. The surface parameters affecting the formation of a quality adhesive bond are described. The design features of a flexible grinding tool and their effect on the formation of surface roughness are considered. Data of the surface microprofile treated by a grit cloth and a flap wheel under various cutting conditions are compared. Discussion and Conclusions. Mechanical processing by flap wheels can replace manual sanding of parts made of polymeric composite materials, drastically reduce the operation time, and improve quality rating of the part surfaces for pasting.