Research On On-line Pneumatic Inspection And Compensation For Dynamic Error Of Complex Bore's Cylindricity And Its Application

In the field of precision machinery manufacturing,there are often complicated inner holes with discontinuous surface,large aspect ratio and many intersecting holes.The error of the cylindricity is difficult to control and detect.At present,the domestic manufacturers for complex parts of mass production cylindrical hole error only for sampling,send the part to the working conditions of the harsh measurement room to test,inefficient,unable to detect online,to conduct a comprehensive quality control,which greatly restrict the quality of the product improvement.In view of this,this paper carried out On-line pneumatic inspection of complex bore's cylindricity.In view of the insufficiency of pressure-gap correlation characteristic analysis of pneumatic probe,the single error of cylindricity error of traditional pneumatic inspection method and the large rotary error of rotary axis,the relationship between pressure-gap of pneumatic probe and its influence parameters,cylindricity rapid inspection adaptive hole-shape judgment and error decomposition,accurate inspection of dynamic error compensation and hole wall reconstruction in-depth study,put forward a complex bore cylindrical online inspection technology,and its application to the complex bore cylindrical automation online testing equipment and software development.The first chapter introduces the research background and significance of on-line pneumatic inspection technology of cylindrical bore,and summarizes the research status of the domestic and international research on the error measurement and compensation technology of the cylindrical bore pneumatic measurement and the position-sensitive detector,The insufficiency of research has given the research content and organizational framework of this article.In the second chapter,the pressure-gap correlation function model of multi-condition pneumatic contactors is established.Through the precise modeling of the probe flow field which is influenced by the air resistance,the pressure-gap correlation characteristics of the pneumatic contactors are simulated and analyzed.The results are in agreement with the theoretical results.Based on the verified simulation model,the relationship between the structure parameters of back pressure and backlash,such as the diameter of main nozzle,the diameter of nozzle and the amount of nozzle sinking,is established.Finally,the structural parameters of pneumatic probe are determined.In the third chapter,the adaptive judgment of the hole shape and the error decomposition in the on-line rapid inspection of the complex inner cylinder are studied.The multi-error composite pneumatic measurement assembly with the hole-shaped adaptive characteristic and the corresponding cylindricity inspection method are designed.The hole shape error is qualified.The accuracy of the test results of different cylindricality test methods is compared to verify the validity of the test method.In the fourth chapter,the dynamic error compensation and hole wall reconstruction in complex in-line cylindricity on-line accurate inspection are studied.The on-line inspection and dynamic error compensation system of cylindricality is constructed to accurately determine the conformity of the shape error of the inner hole.The main factor of the rotation axis deviation,the rotary axis error compensation for the establishment of a dynamic axis compensation model,effectively improve the hole surface information collection and cylindricity error assessment accuracy.In the fifth chapter,in order to quickly judge the conformity of the cylindricity error and identify the two kinds of wall defects,we apply the inspection methods proposed in this paper to develop the complex cylindrical cylindricity with fast judgment and hole wall reconstruction judgment respectively The on-line inspection results of the valve core hole of the processing site and the evaluation results of the measurement capability of the inspection device show that the measurement accuracy and epeatability of the inspection device are good,and the validity of the inspection method proposed in this paper is verified.The sixth chapter summarizes the contents of the full text of the study,and the future direction of the study.