Quality Analysis And Control Of SD Company's C-type New Energy Motor Controller Assembly Process

Governments around the world pay more and more attention to the development of new energy vehicles,SD company has decided to enter new energy vehicles-passenger car market,with the motor controller and the drive system composed of it as flagship products,as the result of Comprehensive system analysis,including macro environment analysis of politics,economy,society and technology,industry and competitive analysis and internal resources analysis.Manufacturing process is one of the important processes for the product quality,and an important quality assurance to realize the product design quality and final product quality.The assembly process is one of the key processes in motor controller production,and the assembly quality has direct effect on product functionality,sealing performance and reliability.In response to SD company's overall development strategy and the action plan,this study establishes the quality analysis and control plan of new energy motor controller assembly,complying with IATF16949,standard of the best automotive companies and customer requirements,on the basis of existing management system,to ensure continuous stable batch production,delivery,and fulfill the quality performance management requirement of the customer and company,It's very important.This thesis adopts the statistical process control(SPC)method in C type motor controller assembly quality analysis and control.Firstly,it describes the basic theory of SPC,including quality variation,Control chart,SPC criteria and process capability etc.Secondly,it establishes the SPC application procedure and implementation method based on process flow for key quality characteristics in C type motor controller assembly process,through the analysis of key process elements,special process characteristics,data acquisition mode as well as SD company's information management level.Finally,it applies the SPC application procedure and implementation method to determine the key quality characteristics.They are tightening torque of DCDC converter,tightening torque of IGBT and tightening torque of controlling PCBA to shielding PCBA.It has been practiced quality analysis and control of tightening torque of IGBT,Which verified that the SPC application procedure and the SPC implementation process in this thesis is effective.The thesis provides a theoretical and practical basis for the quality analysis and control of the C type motor controller as well as other similar products.It can also be used for reference for the quality control of other company product assembly process.