Research On High Frequency Tube Machine Roll Wheel Wear And Anti-friction And Wear Resistance Technology

The automotive industry has become a pillar industry of our country in recent years. Accompanied by the mass production, its affiliated industry areas also have been developing rapidly. As the essential part of the car, auto radiator has been developing greatly for the past few years. Nowadays, there are a variety of series for car radiator. According to the material, it can be divided into aluminum radiator, copper radiator, alloy radiator, etc. While according to the tube type, it can be divided into tube fin type radiator, tube belt type radiator, etc. At present, the high frequency tube machine is the main equipment for the manufacture of radiator pipe.In the process of radiator pipe production, as the roller continually contacts with aluminium tape, intense friction occurs between them. And the plasticity deformation areas are in high pressure condition. The regional abrasions, which occur within the plastic deformation area, damage and disable the roll wheel. These seriously affect the dimensional precision of the radiator pipe and the welded rate. How to guarantee the dimensional accuracy of aluminium strip and prolong the service life of the roller is a very urgent problem needed to be solved. Improving the roller hardness, wear resistance and solving the problem of wear in plastic deformation area are the keys of the research work.In this research, in order to reduce the wear of the roller and ensure the forming dimension accuracy and welded rate of the radiator pipe, the microstructure of the roller area wear interface was studied and the key technology of anti-friction and wear resistance for the roller was analyzed. By the finite element simulation and coating technology the scheme for preparing the roller which had the property of anti-friction and wear resistance was studied. Thereby, the roll wheel could meet the requirement of higher mechanical properties, possess the higher friction performance, and keep lower friction factor between the friction pairs.This paper was divided into six chapters. In the first chapter, the significance of this research project and the research status at home and abroad of the anti-friction and wear resistance roll wheel were summarized. And the innovation points and the key problems needed to be solved in the research project were illuminated. In the second chapter, the design of the overall structure for the high frequency tube machine was studies, and then the working environment and various working parameters of the high frequency tube machine roller wheel were illustrated. This provided the basis for the subsequent design and preparation of high performance high frequency tube machine roll wheel. In the third chapter, the wear damage forms of the roller were studied, when the high frequency tube machine produced the flat tube for the car radiator in a long time. By analyzing the wear surface morphology and the elements of the worn roller wheel, the failure modes of the roller wheel were confirmed. This provided theoretical guidance for the preparation of the anti-friction and wear resistance roll wheel for the subsequent. In the fourth chapter, the finite element simulation analysis was used to obtain the variable of the coating thickness. Moreover, the simulation of rolling process has been accomplished. And then the distribution of the rolling force in the process of rolling was obtained. This provided guidance of the roller coating optimizing in the corresponding region for the subsequent. The fifth chapter is the core content of this research project. In the fifth chapter, the sintering preparation process of the Ni60-Ti C coating specimen for the roller was mainly studied. And by the experiment, the performances of the roller coating specimen with different proportion were compared and analyzed. Then the optimal formula of the Ni60-Ti C coating for the roller was obtained. In the sixth chapter, the research contents in the first five chapters were summarized, the shortcomings in the course of this topic research were analyzed, and the research prospects were proposed.Conclusion: the core aim of this paper is to prepare Ni60-Ti C coating on the roller surface, so as to improve the anti-friction and wear resistance performance; the performances of the four roller coating specimen with different proportion were compared and analyzed, as a result there come to a conclusion that when the Ti C content in the Ni60-Ti C coating was 25%, the prepared roller coating had good surface quality, sufficient hardness and good resistance properties to friction and wear.