Development Of Automotive Power Steering Oil Tank Cap Roller Hemming Dedicated Machine Tool And The Key Technology Study

As of the merits of extending the application life of products, enhancingtheir strength and saving materials, the roll forming process has been takenmore and more attention, and the range of applications is increasinglywidespread. In recent years, with the rapid development of automotiveindustry of china automotive industry, the need of accessories of car isincreasing gradually. Automobile power steering oil tank is a part of theautomobile power steering device, the groove processing of the powersteering oil tank cap often takes the method of cold rolling, whose productsare used to install seal circles, and the processing method commonly knownas roller hemming. the higher degree automation equipment to process thegroove is few in our country, most of the manufacturers use manual operationtrimming machine and it can not meet the production demand. There arevarious types of automobile power steering oil tank cap, this paper discussedthe design of the higher degree automation roller hemming professionalequipment which can process can process four models of power steering oiltank cap, and did some research on theoretical calculation of steering oil tankcap deformation force. The main work has been completed in the paper asfollow:The thesis did a survey about the development of the rolling technologyof ours and abroad, and summarized its field of application. According to thestructural characteristics of four models of automobile power steering oil tankcap, the requirements of roller hemming dedicated equipment have beensummarized and the corresponding rolling process has been proposed.Thepaper indicates that taking the steering oil tank cap whose outside dimensionsare maximum as the base to design the equipment. Some attention must bepaid to the problems that the compensation of size when the equipment isdesigned, order to meet the processing requirements of several other steering tank caps.Through a simple analysis of rolling tool structure in the field of therolling process, the rolling tool of steering tank cap hemming has beendesigned. Aiming at the problem that there is no mature formula to calculatethe solutions of the roller hemming pressure of steering oil tank cap, anacademic calculation mathematical model was established, which is based onanalyzing the deformation characteristics of steering oil tank cap and incommon, the way to solving deformation force when metals has plasticdeformation. The viewpoint that feeding speed and rotational speed ofsteering oil tank cap can affect rolling time is presented.The academic calculation mathematical model of roller hemmingpressure is verified with the corresponding experimental. And the relationshipbetween feeding speed, rotational speed of steering oil tank cap and rollingtime is detected with the corresponding experimental, accordingly to verifythe viewpoint which has be presented.Roller hemming dedicated equipment which can process four models ofpower steering oil tank cap and have higher degree of automation, isdeveloped, and it has been put into use. Up to now, the equipment has a gooduse of effects.