Research On Surface Injection Technology Of Motorcycle Engine Cover Based On Machine Vision

In the production of motorcycle engine,it is necessary to fill the trademark character grooves on the outer surface of the cover.The covers of all kinds of motorcycle engines have different shapes and are difficult to locate;The cover surface is composed of English characters of the groove,for the same batch of processing of the cover,the use of die casting or milling processing of the groove depth is different,the feeding amount needs to be adjusted according to the groove depth change,to prevent insufficient or overflow of the feeding amount;The width of the character groove is narrow,and the feeding head needs to move along the center line of the groove,otherwise the pigment will hang on the wall and splash out.At present,the traditional domestic feeding process has low production efficiency,serious waste of materials and high labor intensity of workers,which can not meet the requirements of the feeding industry on the level of feeding technology and processing efficiency.Aiming at the above problems,this paper studies the surface feeding technology of motorcycle engine cover.Through template matching,the workpiece is accurately positioned;Image processing and curve modeling are used to complete the trajectory planning;Design key mechanical devices according to system process requirements;Combined with the functional requirements of the system,complete the man-machine interface design.Specific research contents are as follows:Firstly,according to the requirement of process accuracy,a machine vision system hardware platform is constructed.In the light of the surface characteristics of the engine cover,the median filtering algorithm was used to smooth the image of the cover template,and the nonlinear coherent enhancement method was used to highlight the profile features of the cover surface.Study the template matching algorithm of normalized crosscorrelation measure,and the image pyramid model is introduced to accelerate the matching speed,achieving precise positioning of the engine cover.Secondly,with regards to the template image,the engine cover surface injection area is divided,and the character information on the surface is recognized.The improved Rosenfeld algorithm is used to extract the character skeleton and obtain the coordinate of feature points.Using NURBS curves,the skeleton is fitted and the curve is discretized equally according to the injection process requirements.This enables the completion of injection trajectory planning.Next,Analyzing the technological process and functional requirements of the cover surface feeding system.According to the functional requirements,researching the main functional modules of the equipment.A lift-rotating worktable is designed to achieve precise positioning of the workpiece.A multi-color injection head assembly device is designed to achieve multi-color injection.An automatic material pressing control system is designed that can achieve variable and controllable injection volume according to demand,in order to achieve accurate injection.Finally,based on the process requirements and control flow of the multi-color injection system for the engine cover surface,the software functional requirements are analyzed.Using the VC++ development environment,designing system main manmachine interface.The whole machine is debugged and operated to ensure stable equipment operation.Combined with the research content of this paper,the whole machine feeding experiment is carried out.Using the developed feeding equipment,the feeding experiment was carried out on the surface of a brand machine cover.The experimental results show that the surface charging system can realize the expected function and the whole machine runs well.