Structure And Process Optimization Of High Velocity Oxy-Fuel Spraying Gun Based On Erosion Wear

High Velocity Oxy-Fuel Spray is an advanced green manufacture technology for modern surface engineering.It is also one of the most promising application technology to replace traditional chromium plating process.However,in the actual spraying operation,the erosion and clogging of the barrel happens sometimes,which seriously restricts its application process to promote industrialization.Therefore,this paper takes the high velocity oxy-fuel spray gun developed independently by a company as the research object.The three-dimension model of the barrel structure is built by using the SolidWorks software.On the subject of the particle trajectory optimization to avoid the erosion,the two aspects of the gun structure and spraying process parameters are discussed and analyzed.(1)The mechanism of erosion and wear for the spray barrel sampled was analyzed and the corresponding simplified theoretical model is established according to the actual physical model of the barrel.(2)The simulation experiment design was carried out.Taking into account that many spray factors could impact on the particle flight characteristics,it was not desirable to analyze all factors completely.To save time and computing resources,the 6 factors and 5 levels orthogonal test method was used to carry out the simulation experiment.(3)The simulation experiment was systematically analyzed,and the preliminary optimization design results were obtained.The factors influencing the flight characteristics and erosion and wear noticeably were found.As a basis,it is ready for further in-depth optimization.(4)The design of the spray barrel structure and the spray parameters is optimized,and the parameters optimized were simulated and verified.