| In this paper, the temperature field of vacuum brazing furnace is studied. The non-uniform distribution of the temperature field is analyzed by numerical simulation software and heat transfer theory. According to the distribution law of temperature field, a kind of porous metal cover is designed to reduce the non-uniformity of the temperature field. The feasibility of the method is verified both by simulation and experiment.The main contents completed in this paper are as follows:(1)The three-dimensional temperature field of vacuum brazing furnace is simulated. The temperature field uniformity is verified and the distribution law of temperature field is preliminary obtained.(2)The distribution of temperature field along the radial, tangential and axial is studied and the basic reason of temperature field non-uniformity is explained by the heat transfer theory.(3)According to the distribution law of temperature field and the heat transfer theory, a kind of porous metal cover is designed. The optimal design scheme is determined by simulation.(4)Two groups of vacuum brazing diamond wire are made, one is made under the porous metal cover and another is without the porous metal cover. The morphology and wear experimental results of the two groups of brazing diamond wire is compared and it shows that diamond wire saws made under the porous metal cover have better welding quality. The research shows that the porous metal cover can effectively reduce the non-uniformity of the temperature field of vacuum brazing furnace. |
PDF Full Text Request