Experimental Investigations into Abrasive Jet Precision Finishing

• 1、School of Mechanical Engineering，Qingdao Technological University
• 2、School of Mechanical Engineering and Automation，Northeastern University

Abstract：The abrasive jet finishing process with wheel as restrain is a kind of compound precision finishing process that combined with grinding and abrasive jet machining, in which inject slurry of abrasive and liquid solvent to grinding zone between grinding wheel and work surface under haven’t cut-deep infeed condition when accomplished workpiece grinding. The abrasive particles are driven and energized by the rotating grinding wheel and liquid hydrodynamic pressure and increased slurry speed between grinding wheel and work surface to achieve micro removal machining. In the present work, the effects of different process parameters, such as particle size, abrasive concentration, machining cycles, the velocity of grinding wheel and medium type on surface finish were investigated. Experiments were performed with plane grinder M7120 and workpiece material Q235A. The machined surface morphology was studied using SEM and microscope and microcosmic geometry parameters were measured with TALSYURF instrument. The experimental results under percentage 10 abrasive concentration, W7 Al2O3 particle and machining 20～30 circles showing the novelty process method, not only to attain higher surface form accuracy, to diminish grinding defects such as severely deformation, surface layer pollution and ground burnout, but also to can acquire efficiently free defects finishing surface with Ra0.15～1.6µm and finally achieve high efficiency, high precision and low roughness values, furthermore, Integrating grinding process and abrasive jet finishing process into one features.

Keywords： Abrasive jet, Precision finishing, Process parameters, Surface roughness