【摘要】：制造業(yè)體現(xiàn)了一個國家的生產(chǎn)力水平,未來制造業(yè)水平的提升離不開自動生產(chǎn)線的發(fā)展,機械傳動部分作為生產(chǎn)線的主體,勢必要對其傳動速度、精度、自動化程度提出更高標準。由于生產(chǎn)工藝的要求,機械傳動部分往往需要實現(xiàn)周期性的分度以及擺動動作等,而現(xiàn)有的傳動裝置或機構(gòu)大多只能實現(xiàn)單一的分度或擺動動作,需要分別進行控制,傳動精度不高,整個傳動系統(tǒng)復雜,也不符合現(xiàn)代制造集成化的要求,逐漸要被市場所淘汰。針對目前的現(xiàn)狀,本文在現(xiàn)有弧面凸輪機構(gòu)的基礎(chǔ)上提出了一種應(yīng)用于自動生產(chǎn)線的分度與擺動組合傳動裝置,主要從以下幾個方面進行研究。(1)建立弧面凸輪的數(shù)學模型。利用弧面凸輪滾軸跡面的直紋面特征以及實際廓面與其互為等距曲面的特點,提出了采用等距曲面法建立方程的方法,建立了弧面凸輪通用廓面方程。對弧面凸輪機構(gòu)的初始位置進行分析,并對壓力角和曲率特性進行研究。最后設(shè)計一算例,證明所建數(shù)學模型的正確性,此方法大大簡化了弧面凸輪廓面分析和求解過程。(2)設(shè)計一種基于弧面凸輪的分度與擺動組合傳動裝置,取代原有只能實現(xiàn)單一運動的傳統(tǒng)間歇機構(gòu)或裝置。對該裝置進行結(jié)構(gòu)設(shè)計,之后為滿足生產(chǎn)線中兩工序之間大擺角要求,設(shè)計了180°擺角的弧面擺動凸輪機構(gòu),最后以LED分光機傳送料系統(tǒng)為設(shè)計實例,計算了裝置各尺寸。(3)總結(jié)分析了現(xiàn)有對弧面凸輪的建模方式,采用基于等距曲面原理的方法完成對弧面凸輪的建模。創(chuàng)建傳動裝置的各個零件的實體模型之后,在Pro/E的裝配環(huán)境中,將已經(jīng)建立好的各個零部件模型按照之前的設(shè)計進行裝配,確定無誤后,為了更加清晰地反應(yīng)傳動裝置的結(jié)構(gòu)組成,生成裝置工程圖。(4)對傳動裝置進行動力學仿真。首先在ADAMS軟件中對裝置的多剛體模型的角位移、角速度、角加速度測試,通過分析仿真結(jié)果,表明本裝置的設(shè)計及建模過程是正確的,之后在ANSYS軟件中對傳動軸進行了模態(tài)分析,重點闡述了傳動軸柔性化過程,將處理后的傳動軸導入ADAMS中建立裝置的剛?cè)狁詈夏Ｐ?選取輸出端角加速度作為研究對象進行動力學仿真,驗證本裝置是否滿足設(shè)計要求。
[Abstract]:The manufacturing industry embodies the level of productivity of a country. In the future, the upgrading of the manufacturing industry level cannot be separated from the development of the automatic production line. As the main part of the production line, the mechanical transmission part is bound to have a bearing on the speed and accuracy of its transmission. The degree of automation sets higher standards. Because of the requirement of production technology, the mechanical transmission part often needs to realize periodic indexing and swing action, but most of the existing transmission devices or mechanisms can only realize a single indexing or swinging movement, which need to be controlled separately. The transmission accuracy is not high, the whole transmission system is complex and does not meet the requirements of modern manufacturing integration, and will be gradually eliminated by the market. In view of the present situation, this paper presents a combined indexing and swinging transmission device for automatic production line based on the existing globoidal cam mechanism. The main contents are as follows: (1) the mathematical model of globoidal cam is established. Based on the characteristics of the straight line surface of the globoidal cam roller trace surface and the fact that the actual profile surface is equidistant with each other, the method of establishing the equation by using the equidistant surface method is proposed, and the general profile equation of the globoidal cam is established. The initial position of globoidal cam mechanism is analyzed, and the pressure angle and curvature characteristics are studied. Finally, an example is designed to prove the correctness of the established mathematical model. This method greatly simplifies the analysis and solution process of the globoidal cam profile. (2) A combined indexing and swinging transmission device based on the globoidal cam is designed. To replace a traditional intermittent mechanism or device that can only achieve a single motion. The structure of the device is designed. In order to meet the requirement of large swing angle between two processes in the production line, the globoidal swing cam mechanism with 180 擄swing angle is designed. Finally, the transmission material system of LED spectrometer is taken as a design example. The various dimensions of the device are calculated. (3) the existing modeling methods of the globoidal cam are summarized and analyzed, and the method based on the principle of equidistant surface is adopted to complete the modeling of the globoidal cam. After creating the solid model of each part of the transmission device, in the assembly environment of Pro/E, the various parts models that have already been established are assembled according to the previous design. In order to make the structure of the device more clear, the engineering drawings of the device are generated. (4) the dynamic simulation of the transmission device is carried out. First, the angular displacement, angular velocity and angular acceleration of the multi-rigid body model of the device are tested in ADAMS software. The simulation results show that the design and modeling process of the device is correct. Then the modal analysis of the transmission shaft is carried out in the ANSYS software, and the flexible process of the drive shaft is expounded, and the rigid-flexible coupling model of the device is established by importing the treated transmission shaft into the ADAMS. The angular acceleration at the output end is chosen as the research object for dynamic simulation to verify whether the device meets the design requirements.
【學位授予單位】：濟南大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TH132.47

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