發(fā)布時間：2018-07-04 10:34

  本文選題：普通珩磨 + 超聲外圓珩磨　； 參考：《中北大學》2017年碩士論文

【摘要】：鈦合金和不銹鋼等難加工材料因為其超高強度、高硬度、耐疲勞等優(yōu)越的材料性能,被越來越多的應用于機械行業(yè)中。但是以上材料通過普通加工手段進行加工后,難以得到良好的表面質量,珩磨加工作為精密特種加工的一種,對難加工材料有良好的加工效果。超聲珩磨技術在保持了珩磨加工優(yōu)點的同時,克服了普通珩磨中油石易堵塞的問題,進一步提高了加工精度和加工效率。常規(guī)超聲振動珩磨技術的加工對象主要為內圓表面,但在實際加工中,軸類零件的外圓表面也常常需要較高的表面質量。針對這樣的研究現(xiàn)狀,本文對超聲振動外圓珩磨加工的加工機理進行了研究,同時結合實際加工設計出一套試驗裝置,以TC4鈦合金和SUS304不銹鋼為試驗對象進行了試驗研究。本文的主要研究內容以及取得的成果如下:1.首先對磨削中單磨粒的受力進行了分解,并對磨削力進行了建模,對其數學表達式進行了求解;其次分析了功率超聲外圓珩磨的運動形式及其加工機理,分析并建立了徑向振動中超聲外圓珩磨磨粒材料去除的模型。2.對關鍵部件進行設計。根據頻率方程并結合邊界條件設計壓電換能器;運用波動方程和質點振動位移函數確定超聲變幅桿的尺寸參數;依照一體化設計思想確定珩磨頭部分尺寸,修正變幅桿尺寸。對以上各部件的設計進行用ANSYS仿真,確認其合理性;根據試驗用車床的結構參數,確定試驗裝置的裝載方案。3.利用設計的試驗裝置進行正交試驗,分析油石粒度、工件回轉速度和珩磨深度等試驗參數對普通珩磨后加工表面質量的影響,在引入超聲振動后,進行對比試驗。記錄兩組試驗的試驗數據,研究超聲振動對珩工件表面質量的影響,分析超聲振幅的影響。
[Abstract]:Titanium alloy and stainless steel are more and more widely used in mechanical industry because of their super strength, high hardness, fatigue resistance and so on. However, it is difficult to obtain good surface quality after the above materials are processed by common processing means. Honing, as a kind of precision special machining, has a good processing effect on difficult processing materials. Ultrasonic honing technology not only keeps the advantages of honing, but also overcomes the problem of easy clogging of oil stone in common honing, and further improves the machining accuracy and efficiency. The machining object of conventional ultrasonic vibration honing technique is mainly inner circle surface, but in practice, the outer circle surface of shaft parts often needs higher surface quality. In view of this research situation, this paper studies the machining mechanism of ultrasonic vibration external circle honing, and designs a set of experimental device combined with the actual processing, taking TC4 titanium alloy and SUS304 stainless steel as experimental objects. The main contents and achievements of this paper are as follows: 1. Firstly, the force of single abrasive particle in grinding is decomposed, and the grinding force is modeled and its mathematical expression is solved. Secondly, the motion form and machining mechanism of power ultrasonic external circle honing are analyzed. The removal model of ultrasonic cylindrical honing abrasive material in radial vibration is analyzed and established. Design key components. The piezoelectric transducer is designed according to the frequency equation and boundary condition; the dimension parameters of ultrasonic horn are determined by wave equation and displacement function of particle vibration; and the dimension of honing head is determined according to the integrative design idea. The design of the above components is simulated by ANSYS to confirm its rationality, and the loading scheme of the test device is determined according to the structural parameters of the test lathe. The orthogonal test was carried out with the designed test equipment to analyze the influence of the testing parameters such as the particle size of the stone, the rotation speed of the workpiece and the honing depth on the surface quality of the common honing. After ultrasonic vibration was introduced, the comparative tests were carried out. The influence of ultrasonic vibration on the surface quality of honing workpiece was studied by recording the experimental data of two groups of experiments and analyzing the influence of ultrasonic amplitude.
【學位授予單位】：中北大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG589;TG663

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本文編號：2095784