Experimental Study On The Texture Of Interference Fit Interface For Remanufacturing Of Low Disassembly Damage Demand

Remanufacturing is a kind of technology repair to the waste products,and makes its performance even more than the new product's green production model.With the amount of interference design of the impeller and the main shaft of the compressor rotor is as high as 1.7 per thousand per thousand-2.2 pipeline in the remanufacturing dismantling process.It is easy to produce dismantling injury.So it is necessary to reduce the damage surface with dismantling.In this paper,the three-dimensional model of the interference fit rotor is set up first,and the contact stress between the interference fit interface under the normal temperature and the heating state is analyzed.According to the simulation results,the test of the disassembly test and the load bearing capacity of the interference fit are designed.The surface damage is measured by three dimensional profilometer.6 index parameters representing the dismantling damage are selected from the ISO-25178 standard.The weight of each parameter is determined by entropy analysis method,and the comprehensive evaluation of the interface damage is realized.Secondly,in order to reduce the surface damage of disassembly,the surface texture is introduced to the surface,and the ideal effect is obtained.The dimples,dismantling damage orthogonal design of three factors and five levels,and the test results by range analysis and variance analysis,found that the texture parameters on the effects of sequential dismantling of the injury is better than the equivalent circle diameter of single texture shape.The optimal texture parameters that can reduce the dismantling damage are round concave textures with a diameter of 100 m.Finally,taking the interference fit axle sleeve model as the object,a mathematical model of bearing capacity is established.It is found that the friction coefficient of the optimal texture surface is about 40% higher than that of the non-textured surface,but the friction coefficient decreases with the increase of the number of disassembly.When the number of disassembly reaches two times,the friction coefficient is only higher than that of the non-textured surface 0.01~0.04.From the point of view of disassembly and service performance,introducing texture into interference fit interface can not only reduce the dismantling damage,but also meet the service performance.It has high feasibility and practical value.