Analysis On Axis Straightness Error Of Deep And Small Hole Based On Ultrasonic Detection And Image Processing

The deep hole machining technology is one of the most cutting-edge technologies in the field of mechanical manufacturing.Deep hole machining technology is mainly used in aerospace,aviation,military,deep hole drilling and other important fields.Relative to the detection and evaluation of the axial straightness error of shallow hole and large hole,the subject research of the detection and evaluation of the axis straightness error of deep and small hole is still in its initial stage.As the deep hole machining technology gradually develops toward the direction of the high aspect ratio and the micro-hole,it is particularly important to carry out investigation on the axis straightness error detection of the deep and small hole.In this subject,the high-speed EDM machine tool was used to manufacture the deep and small holes with the required diameter.The platform of ultrasonic detection based on the principle of ultrasonic detection was built for the axis straightness error detection of the deep hole work-piece.To realize the visualization requirements of the axis straightness error detection of the deep and small hole,the GUI visualization interface based on MATLAB image processing was developed.The main contents completed are as follows:1)The main forms of the axis deflection in the processing of deep and small hole parts were analyzed,and three different evaluation methods of the two end-point connection method,the least square method and the minimum containment cylinder method for solving the axis straightness error of the deep and small hole were introduced.2)The high-speed EDM machine tool was used to process the deep and small hole sample-part with the required diameter of 1.0 mm,and divided the deep and small hole sample-part to be measured into eight hole-section,and each hole-section has eight measuring marked-points were prepared for the follow-up ultrasonic detection.3)For the detection of the axis straightness error of the deep and small hole work-piece,the Olympus Model 5800PR ultrasonic pulse generator and receiver,Tektronix DPO3012 digital fluorescent oscilloscope,V116-RM fingertip contact sensor probe,PC notebook and Tektronix OpenChoice Desktop synchronous display software were built that the ultrasonic detection platform based on the principle of ultrasonic testing was introduced.4)In order to realize the visualization requirements of the axis straightness error detection of deep and small hole,the image processing technology and GUI visualization technology of the MATLAB software were used to develop a GUI visual interface for the detection data processing of the deep hole work-piece axis.Just import the measured data into the GUI visual interface application program,and select the corresponding evaluation method for the axis straightness of the deep and small hole work-piece,you can obtain the axis straightness error value of the deep and small hole under three different evaluation methods that the two end-point connection method,the least square method and the minimum containment cylinder method.Thus,the axis straightness detection with the intelligent and visual operation of data processing was realizedFigure[61]table[8]reference[92]...