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摘要
Taking the tubular heat exchanger as the research object, based on the actual production and processing parameters, the simulation model of tube expanding and cutting process of heat exchanger tube and tube plate was established, the Abaqus software was used to simulate and analyze the model, and the distribution of residual contact pressure after tube expanding was studied. On this basis, the influence of cutting depth on the residual contact pressure during cutting process was further analyzed. The results show that after the tube expanding process, the residual contact pressure in the middle of the contact part between heat exchanger tube and tube plate is less than that at both ends. The uneven distribution degree of residual contact pressure at the joint affected by cutting force becomes more significant with the gradually increase of cutting depth in the cutting process. When the cutting depth is greater than 1. 28 mm, gaps apear in the cutting process, thus the sealing effect formed by the previous process was destroied. In order not to add additional tube expanding processes, it is necessary to select the cutting parameters reasonably and control the cutting force in the cutting process. ? 2023 Beijing Res. Inst. of Mechanical and Elec. Technology.
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