本文選題：弱剛度件 + 切削力仿真　； 參考：《北京理工大學》2015年碩士論文

【摘要】：切削顫振幾乎存在于所有的金屬切削過程中,是提高切削效率所面臨的主要障礙。本文以典型高精度弱剛度件齒圈為研究對象,針對金屬切削中的加工顫振進行研究,研究機床車削加工工藝系統(tǒng)振動特性對齒圈加工穩(wěn)定性的影響。主要研究內(nèi)容包括以下幾個方面：首先,利用有限元仿真軟件ABAQUS對20Cr2Ni4A材料齒圈進行三維切削過程仿真,考慮切削過程熱力耦合的作用以使仿真真實可靠,得到了切削系統(tǒng)三個方向的切削力,并通過計算獲得工件徑向材料單位面積切削力系數(shù),為建立瞬時切削力奠定了基礎。其次,通過錘擊試驗,采用單點激勵法和正交多項式整體擬合方法獲得刀具-機床系統(tǒng)和工件-機床系統(tǒng)的模態(tài)參數(shù)包括一階固有頻率、等效剛度和阻尼比。第三,分析加工顫振產(chǎn)生機理并對齒圈進行切削穩(wěn)定性分析,建立了工件系統(tǒng)和刀具系統(tǒng)的二自由度二階線性微分方程,并在頻域內(nèi)對方程進行求解得到主軸轉速和切削寬度之間的關系,利用Matlab軟件繪制了切削穩(wěn)定性極限圖。最后,依據(jù)切削穩(wěn)定性極限圖選取齒圈加工參數(shù),并進行車削試驗,驗證了所建立模型的正確性,展現(xiàn)了齒圈切削的穩(wěn)定切削參數(shù)選擇的范圍。
[Abstract]:Cutting chatter, which exists in almost all metal cutting processes, is the main obstacle to improve cutting efficiency. In this paper, the machining chatter in metal cutting is studied, and the influence of vibration characteristics of machining technology system on the stability of gear ring machining is studied. The main research contents include the following aspects: firstly, the 3D cutting process of 20Cr2Ni4A material gear ring is simulated by finite element simulation software Abaqus, considering the effect of thermal coupling of cutting process to make the simulation true and reliable. The cutting force in three directions of the cutting system is obtained, and the cutting force coefficient per unit area of the radial material of the workpiece is obtained by calculation, which lays a foundation for the establishment of the instantaneous cutting force. Secondly, by hammering test, the modal parameters of the cutter-machine tool system and workpiece machine tool system including the first-order natural frequency, the equivalent stiffness and the damping ratio are obtained by using the single-point excitation method and the orthogonal polynomial integral fitting method. Thirdly, the mechanism of machining chatter is analyzed and the cutting stability of gear ring is analyzed. The two-degree-of-freedom linear differential equation of workpiece system and cutting tool system is established. The relationship between spindle speed and cutting width is obtained by solving the equation in frequency domain. The cutting stability limit diagram is drawn by Matlab software. Finally, the machining parameters of gear ring are selected according to the cutting stability limit diagram, and the turning test is carried out, which verifies the correctness of the established model and shows the range of the selection of the stable cutting parameters of gear ring cutting.
【學位授予單位】：北京理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TG51

【相似文獻】

相關期刊論文 前10條

1 趙維農(nóng) ,辜美進;國外可變加工系統(tǒng)發(fā)展的一些動向[J];組合機床通訊;1979年12期

2 余承宙;對國外可變加工系統(tǒng)的分析[J];組合機床通訊;1979年12期

3 G.Stute,劉遠鵬 ,解冀生;可變加工系統(tǒng)[J];組合機床通訊;1979年12期

4 劉遠鵬;可變加工系統(tǒng)的控制[J];組合機床通訊;1979年12期

5 角南彰;李文;;用群控加工系統(tǒng)加工柴油機零件[J];國外機車車輛工藝;1983年02期

6 王滿元;;平面銑削加工系統(tǒng)的動態(tài)研究[J];哈爾濱科學技術大學科學報告會論文摘要匯編;1985年S1期

7 杜漸;;模具深槽的新型加工系統(tǒng)[J];工具技術;1993年04期

8 范文高;;磨削加工系統(tǒng)的分析和掌握[J];北京機械;1982年04期

9 顏國正,趙國光,余承業(yè);新型伺服驅(qū)動微型電加工系統(tǒng)的研究[J];電加工;1995年04期

10 王平江,陳吉紅,周濟,李作清;激光數(shù)字化仿形測量與加工系統(tǒng)[J];中國機械工程;1998年05期

相關碩士學位論文 前1條

1 徐東曉;齒圈車削加工系統(tǒng)顫振穩(wěn)定性研究[D];北京理工大學;2015年

，

本文編號：2109232