Design Of Oil Leakage Detection System For Bridge Box Cover Parts

The casting defects of heavy truck drive axle parts are one of the key factors that affect product quality.Jinan Xinyuanxin Machinery Manufacturing Company purchases rough parts of the bridge box cover for production and processing,it is necessary to carry out oil leakage detection in order to improve the qualified rate of the product,the original traditional manual oil leakage detection device on the bridge box cover production line has low working efficiency,low detection accuracy,and the qualified rate of parts is only 83%,and some small testing equipment on the market and the enterprise testing products do not match,high-precision automatic detection equipment for the enterprise is not high economical for this company.In line with the concept of replacing old drivers of growth with new ones,according to the needs of the business and the actual situation,on the basis of the original oil leakage detection equipment,the transformation design is modified,the automatic production equipment with hydraulic and pneumatic transmission system controlled by PLC is developed.Firstly,the method of air tightness detection suitable for enterprises is studied.Through comparison,combined with the actual situation of the enterprise,the method of water detection and bubbling is selected,and the pressure generated by lubricating oil during the working movement of truck bridge box is simulated with gas pressure.Secondly,the control scheme of the workbench of the oil leakage detection equipment for the parts of the bridge box cover is studied.Firstly,a limited design is made for the position of the worktable parts.Secondly,the semi-finished parts and finished parts of the different structure of the table sealing requirements are designed;Finally,the work of the worktable and the detection of gas seal equipment to do the control design.Thirdly,the control scheme of the oil leakage detection equipment of the water storage tank and the pressure control system of the bridge box cover parts are studied.The mathematical model of each control system is established respectively,and the PID control and fuzzy-PID control algorithm are simulated.By comparing the simulation data,the PID control algorithm which meets the process requirements of the enterprise is selected to realize the stable control of the liquid level in the storage tank,and the fuzzy-PID control algorithm to realize the stable control of the pressure.Finally,system debugging.After four months of test,according to the actual data,it is calculated that the correct rate of the oil leakage detection of the bridge box cover parts by using the developed equipment is increased by 95%,which solves the shortcoming of the artificial pressure,reduces the number of workers and reduces the labor intensity.As a non-standard equipment,this system has established a new simple and effective method and means for the detection of pores and sand-holes in casting parts in the auto parts production industry,the mechanical structure design of the system is simple,easy to operate and less disturbed by the external interference,it is suitable for the oil leakage or air tightness detection of some other small processing axle parts.