Structural Design And Error Analysis Of Water-wall Cladding Special Machine

The abrasion problem has restricted circulating fluidized bed boiler(CFB)'s working life and development, the traditional wear methods of Water-wall have kinds of shortcomings, the alloy cladding of the Water-wall has some advantages that other methods don't possess,developing a alloy cladding special machine become urgent need to be solved.In this paper the abrasion mechanism and common prevention measures of CFB is introduced, coMPared to kinds of prevention measures, the alloy cladding of the Water-wall have lots of advantages, such as the cladding wires can melt with the base kindly, the cladding layer won't flak, the Rockwell hardness of cladding layer is beyond 50. The result proves that the work-life is lengthened for 5 years with alloy cladding. designed a cladding special machine of Water-wall with four freedoms on the basis of development condition of cladding special machine at home and abroad, which have the functions, four axes linkages and automatic path-layout. The special machine can quick dismount to functional modules which can through the boiler front whose diameter is 450mn. The special machine design decoupling structure at multiple place which can rapidly installed with not precise correction.The paper analyze the important part of the cladding special machine with ANSYS Workbench finite element analysis software, the result shows that the part is qualified, Due to the double X rails need to adjust the space for adapting the environment, when the Z rail support a force, analyze the deformation and stress at different space, the result shows that the bigger space for the rails the smaller deformation. For the X rail too heavey, the paper modified the section of the X rail. Proposing a X rail which is lightweight and strength and stiffness meet requirements. The paper analyze the deformation which will be substituted in error analysis and do further analyzes.Due to the error of the manufactured and installed,there is a error between the actual position and ideal position which influence the cladding quality hardly, Establish the error models of the cladding special machine and got the error formula on six freedoms. The machine joined the laser distance sensor for improving the cladding accuracy and efficiency,Proposing the skill of Automatic find the welding position, improving the cladding efficiency.Finally, the paper do the mechanical property test, verifying the machine can work normally and achieving performance of cladding test. Perform the cladding experiment to special machine, analyzing the effect of process parameters and finding a group of best parameters, the quality of cladding meet the cladding standard. finally, list the quality influence of the error and prove the model formula from both object and model, preparing for improving the cladding precision.