【摘要】：圓錐螺紋作為一種連接緊密,氣密性良好的連接螺紋,其具有裝配容易,能夠得到過盈配合,確保良好密封效果的優(yōu)點。隨著其設(shè)計和加工水平的提高,對錐螺紋測量的準確度也提出了更高的要求,以往螺紋檢測方式主要以螺紋規(guī)檢測為主,其人工檢測效率低,受人為因素影響大,專業(yè)的檢測儀器由于體積的限制只能在固定地點進行測量,針對這些弊端,提出了一種便攜式螺紋檢測系統(tǒng),對比以往的檢測方法,該系統(tǒng)測量精度高、效率高,靈活性高,受人為因素影響小。首先,本文在總結(jié)了錐螺紋國內(nèi)外測量的發(fā)展趨勢以及激光測量原理的基礎(chǔ)上,提出了非在機測量系統(tǒng)的設(shè)計要求,并完成了測量系統(tǒng)的總體結(jié)構(gòu)設(shè)計,并對一些關(guān)鍵部件提出了不同的設(shè)計方案,通過計算受力以及變形分析,以達到優(yōu)化設(shè)計的目的。本文提出了一種新型螺紋夾緊結(jié)構(gòu),采用三圓弧曲面對螺紋進行夾緊,實現(xiàn)快速夾緊的同時,還能保證被測件軸線的準確定位,提高了測量的準確化以及效率化。其次對錐螺紋的牙型進行了建模,運用仿真軟件對其輪廓圖形進行了模擬,之后基于最小二乘法提出了改進的最小二乘法理論,并通過對已有的數(shù)據(jù)進行擬合和圖形重構(gòu),通過計算并將兩者方法進行對比,以獲得更優(yōu)的數(shù)據(jù)處理方法。最后分析了測量系統(tǒng)的誤差源,對誤差的產(chǎn)生做了理論分析,并提出了相應(yīng)的誤差補償方法,分析了影響測量準確性的因素,以實現(xiàn)系統(tǒng)的高精度測量。
[Abstract]:As a kind of connection thread with close connection and good air tightness, conical thread has the advantages of easy assembly, interference fit and good sealing effect. With the improvement of its design and processing level, the accuracy of taper thread measurement is also higher. In the past, thread gauge is the main method of thread detection, and its manual inspection efficiency is low, which is greatly influenced by human factors. Due to the limitation of volume, a portable screw thread detection system is put forward, which is more accurate, efficient and flexible than the previous testing methods. It is little influenced by human factors. Firstly, on the basis of summing up the development trend of cone thread measurement at home and abroad and the principle of laser measurement, this paper puts forward the design requirements of off-machine measurement system, and completes the overall structure design of the measurement system. Different design schemes are put forward for some key components, and the purpose of optimum design is achieved by calculating the force and the deformation analysis. In this paper, a new type of thread clamping structure is proposed, which uses tri-arc curved face thread to realize fast clamping, at the same time, it can ensure the accurate orientation of the axis of the measured parts, and improve the accuracy and efficiency of the measurement. Secondly, the tooth profile of conical thread is modeled, and its contour is simulated by simulation software. Then, an improved least square theory is proposed based on the least square method, and the existing data are fitted and reconstructed. By calculating and comparing the two methods, a better data processing method can be obtained. Finally, the error source of the measurement system is analyzed, the generation of the error is theoretically analyzed, the corresponding error compensation method is put forward, and the factors affecting the accuracy of the measurement are analyzed in order to realize the high precision measurement of the system.
【學(xué)位授予單位】：沈陽工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG85

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