Development Of Automatic Device For Sizes And Defects Measuring Of Aluminum Alloy Drill Pipe

With the exploration,development and utilization of shallow resources approaching saturation,China's oil and gas drilling projects are advancing to deeper strata.In the face of the harsh underground environment,the disadvantages of traditional steel drill pipe due to its weight and corrosion resistance have become more and more prominent.Compared with the traditional steel drill pipe,the aluminum alloy drill pipe has higher specific strength and strong corrosion resistance,so it will have very good development prospects in the future.In China,the research on the aluminum alloy drill pipe is still in its infancy and it has not been widely used in drilling operations.On the one hand,the performance of the aluminum alloy drill pipe material itself needs to be improved;on the other hand,the quality control technology of aluminum alloy drill pipe needs to be strengthened.Product quality inspection is an important part of the industrial production of aluminum alloy drill pipes,and many manufacturers still use manual measurement methods,not only the efficiency is slow,but the measurement quality cannot be guaranteed.Therefore,in order to fill the gaps in China's aluminum alloy drill pipe inspection technology and equipment,this article carried out the following research on the full-size aluminum alloy drill pipe size and defect inspection device:An automatic inspection device for aluminum alloy drill pipe size and defects is designed,which includes a chassis mechanism,a supporting mechanism,a measuring mechanism and a video inspection mechanism.The chassis mechanism is the overall support structure of the full-size aluminum alloy drill pipe inspection device.It is required to withstand the weight of the aluminum alloy drill pipe and the force load during normal operation.At the same time,it is necessary to ensure the smooth operation of the support mechanism,the measuring mechanism and the video inspection mechanism on it.The support mechanism is the support and power mechanism of the aluminum alloy drill pipe.During the inspection process of the aluminum alloy drill pipe,it mainly plays the role of supporting the drill pipe and driving the drill pipe to translate and rotate in the axial direction.The measuring mechanism plays a role in measuring the outer dimensions of aluminum alloy drill pipes,and can automatically and continuously measure the outer diameter and wall thickness of the drill pipe at different positions.The video inspection mechanism is an observation mechanism for the inner surface of the aluminum alloy drill pipe,which judges whether there are defects on the inner surface of the aluminum alloy drill pipe by means of video.Through calculation,the geared motor,cylinder,sensor and other components of the device are reasonably selected,which improves the stability of the inspection device.The finite element statics analysis of the chassis mechanism of the device was carried out using ANSYS Workbench.The stress concentration and bending deformation of the chassis mechanism after the aluminum alloy drill pipe is placed on the supporting mechanism are studied.The results show that the midpoint of each beam section of the base receives the largest stress,about 3MPa,and the bending deformation at this point is also the largest,about 0.3mm,which indicates that the chassis mechanism of the device will not be significantly affected under this working condition.In addition,the stress concentration and bending deformation of the chassis mechanism when the measuring mechanism moves to the midpoint of the edge beam section are also studied.The results show that in this case,the edge column closest to the stress point receives the largest stress,about 5MPa,and the deformation at the center point of the outermost beam is the largest,about 0.3mm,which shows that the strength of the chassis mechanism fully meets the requirements under this working condition.The modes of the chassis mechanism are studied,and the natural frequencies of the 7th to 10 th steps of the underframe mechanism are calculated to be19.299 Hz,26.053 Hz,33.551 Hz and 43.724 Hz,respectively.Therefore,try to avoid the working frequency of the motor close to the range of 19.299Hz?43.724 Hz to reduce the influence of resonance on the chassis mechanism...