Experimental study on differential processing technology of magnetic particle grinding of elbow

Abstract

According to the characteristics of elbow erosion damage position, a new differential processing technology was proposed. Using the flexibility of the manipulator, the machining gap between the inner and the outer side of the elbow was changed in the process of elbow machining, so as to realize the differential grinding of the inner wall of the elbow and improve its surface quality. The results show that when the machining time is 75 min and the machining gap between the inner and the outer side of the elbow is 2.0 mm, the inner surface roughness of the outer arc of the elbow is reduced from 0.70 μm to 0.34 μm，and the inner surface roughness of the inner arc of the elbow is reduced from 0.82 μm to 0.32 μm. During differential grinding, the outer machining gap of the elbow is 1.5 mm, the inner machining gap remains unchanged at 2.0 mm, the inner surface roughness of the outer arc of the elbow is reduced from 0.70 μm to 0.26 μm，and the inner surface roughness of the inner arc of the elbow is reduced from 0.82 μm to 0.29 μm. Differential grinding can effectively improve the inner surface quality of the elbow.

Keywords

• magnetic abrasive finishing
• surface roughness
• elbow
• machining gap