The Design Of The Weld Dressing System And Research On Grinding Technology For The Straight Welded Pipe

At present,with the rapid development of oil and gas pipeline network in China,the production of pipeline steel is becoming more and more mature.However,the grinding quality of pipe end weld still hinders the high-quality production of pipeline steel welded pipe.In this paper,aiming at the problems of low efficiency,unstable quality and harm to workers’ health in the process of pipe end weld grinding in the UOE production line of LSAW pipe,a pipe end weld grinding system aiming at unmanned is designed,the technological process of the grinding system is combed,and then the whole scheme of the system is designed,and the robot subsystem and detection system are designed in detail.In this paper,according to the working conditions and requirements of the end weld of the straight seam submerged arc welded pipe,the triangular abrasive belt grinding head is designed in detail.The grinding head is mainly composed of pneumatic system,drive system,tension wheel system and contact wheel system.In the robot studio,the actual grinding conditions are built and the interference simulation is carried out,so that the grinding head can better adapt to the grinding of various specifications of steel pipe welds.On the basis of the design of grinding system,a test scheme of grinding process of weld belt is designed to investigate the relationship between the linear speed,feed rate,feed rate,belt particle size and the grinding amount and grinding force.The specific scheme of single factor test and multi factor test is given,which is helpful for the smooth progress of subsequent tests.In order to ensure the grinding accuracy of the grinding sys tem,the static simulation of the grinding head is carried out to verify that the grinding head has sufficient stiffness and strength,and the modal analysis is carried out to give further suggestions on the working frequency of the grinding head motor.When the grinding head works,the speed of the driving wheel is higher.The dynamic response characteristics of the grinding head are analyzed further.Considering the influence of the eccentric load caused by the manufacturing error and the change of the force on the vibration when the grinding head works,the rigid flexible coupling model of the grinding head is established by using ANSYS and Adams.The vibration test and Simulation of the two cases are carried out in ADAMS.The analysis shows that the vibration of the grinding head influences the vibration of the grinding head Grinding accuracy has no effect.