The Development Of Assembly Automatically And Detecting Device For Barrel Of Pressure Vessel

Pressure vessel is a pressure equipment which is widely used in daily life,scientific research and industrial production. Its barrel group quality affects the manufacturing quality of the pressure vessel,and determines the performance of the pressure vessel. But with the development of market economy,the value of the labor force will be significantly improved. The outdated equipment and technology of pressure vessel assembly workshop has been unable to meet the requirements of market for production efficiency and quality of pressure vessel. Therefore,in order to realize automation for pressure vessel assembly and detection,and promotion of production efficiency and quality,it is very necessary to design a assembly automatically and detecting device for pressure vessel barrel.Firstly,through learned and researched the theoretical basis of pressure vessel barrel assembly,different sizes of the transition zone were finite element analyzed by using the ANSYS software. And we got the influence of the transition zone on the stress concentration. Then taking one of these finite element models as an example,optimum design for the structural size of the transition zone has been carried out.Secondly,through analyzed the status and problems of pressure vessel barrel assembly,presented a assembly automatically device for pressure vessel barrel,and determined the overall structure and working principle of the device. This device mainly uses hydraulic roller system of positioning mechanism to clamp barrel. It is very easily to realize automation for pressure vessel assembly. And through finite element analyzed the different wrap angle of roller and barrel by using the ANSYS software,the best wrap angle of welding roller is 60°.Thirdly,through researched and analyzed the traditional methods of coaxiality measurement,and used the experience of the existing measuring device,developed a coaxiality detection automatically device for pressure vessel barrel which is based on laser alignment. This device takes the three-jaw centering mechanism as the core,and uses semiconductor laser as laser light source,and uses position sensitive detector as signal receiver,and uses FPGA signal processor for logical operations of the signal,and has the advantages of simple measurement,high accuracy and high efficiency. Besides,through analyzed the major factors of influencing device accuracy,proposed some corresponding countermeasures.Fourthly,through compared and analyzed the existing methods of misalignment detection and laser ranging,designed a misalignment detection device for pressure vessel barrel which is based on laser triangulation. This device takes two sets of laser range finder as the core,realizes detection automatically for pressure vessel misalignment value of barrel edges. Then,through analyzed the major factors of influencing device accuracy,proposed some corresponding countermeasures.Finally,the contents and shortages of research were summarized,and the next research contents and orientations were prospected.