Authors: A.N. Korotkov, V.A. Korotkov, V.G. Bashtanov, Vidyaev

Title of the article: Evaluation of the efficiency of belt grinding of shafts on lathes

Year: 2022, Issue: 6, Pages: 24-35

Branch of knowledge: 05.02.08 Engineering Technology

Index UDK: 621.922.3

DOI: 10.26730/1999-4125-2022-6-24-35

Abstract: In the presented work, a practical assessment of the effectiveness of the use of various designs of machine tools (removable modules) for belt grinding of shafts on a lathe is given. The analysis of belt grinding schemes, the equipment used and the characteristics of grinding belts, as well as processing modes, was carried out. Based on the results of the analysis, a decision was made and implemented to compare three schemes for belt grinding of shafts on lathes - with a fixed stop, with a rotating roller pressed against the workpiece, and with pressing the "free branch" of the grinding belt. As a result of comparative tests, the most acceptable scheme for belt grinding of shafts on lathes was determined, namely, grinding with a "free branch" of the belt. Rational modes of processing and characteristics of grinding belts were established. The optimal tightness between the belt and the workpiece was 5 mm per diameter along the transverse feed dial of the lathe. The rational belt grinding speed is 35 m/s, the workpiece rotation frequency is 31.5 rpm and the longitudinal belt feed is 0.7 mm/rev. The use of grinding belts from grains of normal electrocorundum with a grain size of 50, 100 and 250 microns in these modes ensured the removal of workpiece material within 0.009÷0.013 mm per diameter per 1 pass of the tool and surface roughness Ra = 0.53÷1.73 microns, Rz=3.96÷10.05 µm. The use of other grain sizes of abrasive grains in the belts led to an excessive increase in roughness and material removal, or to the impossibility of effective processing due to the low transverse rigidity of fine-grained belts.

Key words: Belt grinding schemes grinding modes cutting capacity and wear of sanding belts temperature and roughness during belt grinding

Receiving date: 17.11.2022

Approval date: 01.12.2022

Publication date: 27.12.2022

CITE DOWNLOAD