Research on the influence of cutting parameters on chips in the process of diamond bead cutting pipeline steel

摘要

Diamond bead wire is an important engineering equipment in the repair of submarine oil and gas pipelines. In the process of cutting pipeline steel with diamond bead, the chip shape affects its wear condition, which in turn affects the cutting efficiency. In this paper, based on the principle of displacement damage evolution, the simulation model of diamond grains was established, and the influence of cutting parameters on chip shape and residual stress was studied by dynamic simulation. The results show that: When the cutting speed of diamond grains is 23 m/s, the critical cutting depth for granular chips is 16 mu m, and the residual stress value is the minimum; When the cutting depth of diamond grains is 16 mu m, the range of cutting speed that produces granular chips is 23 m/s similar to 26 m/s. Secondly, a cutting simulation model of electroplated diamond bead was established, and the influence of density on chip shape was studied. The results show that: With the increase of the grain density, the chip size becomes larger and larger, and the chips gradually change from granular chips to ribbon chips (continuous chips). Finally, the correctness of the simulation results was verified, and the best cutting parameters were determined through cutting experiments.