【摘要】：變胞機構(gòu)是機構(gòu)學(xué)研究的一個新的領(lǐng)域,它的提出給機構(gòu)學(xué)帶來了新鮮空氣。通過約束實現(xiàn)變胞全過程的實用變胞機構(gòu),要求對應(yīng)工作構(gòu)態(tài)中的變胞運動副提供相應(yīng)的約束,實現(xiàn)機構(gòu)在工作過程中構(gòu)型的轉(zhuǎn)換、保持和運動時序要求。我們有必要對面向變胞全過程中變胞運動副的阻力之間的關(guān)系進行研究,設(shè)計實用的變胞機構(gòu),本文的主要研究內(nèi)容包括： 首先,介紹約束變胞運動副的約束形式主要包括：幾何約束,阻力約束、組合約束；對約束變胞運動副進行分類,根據(jù)約束形式分為幾何約束變胞運動副、阻力約束變胞運動副和組合約束變胞運動副；設(shè)計典型移動和轉(zhuǎn)動變胞運動副的結(jié)構(gòu),描繪不同類型變胞運動副的阻力特性。在此基礎(chǔ)上介紹典型的空間變胞副,并且描繪它的阻力特性。 其次,分析約束變胞機構(gòu)的變胞全過程,用運動循環(huán)圖表示構(gòu)態(tài)變換中約束變胞運動副的切換過程,分析變胞運動副在構(gòu)態(tài)變換過程中是如何等效的,建立等效阻力梯度模型和調(diào)控機理,用等效阻力梯度曲線描述構(gòu)態(tài)變換過程中變胞運動副的等效過程。 最后,分析基于擴展Assur桿組變胞機構(gòu)的組成原理,提出一種變胞機構(gòu)分析方法,在構(gòu)態(tài)保持過程中將擴展Assur桿組等效成Assur桿組,對機構(gòu)進行動力學(xué)和運動學(xué)分析。引用Assur桿組的動態(tài)靜力分析,提出一種面向變胞全過程的變胞運動副約束力的分析方法,用vc++6.0調(diào)用基本桿組程序?qū)γ嫦蜃儼^程的變胞運動副進行設(shè)計。根據(jù)等效阻力梯度模型和面向變胞全過程的變胞運動副的設(shè)計原理,設(shè)計物料運送機構(gòu),設(shè)計約束變胞運動副之間的阻力特性,建立三維模型進行運動學(xué)仿真,驗證約束變胞運動副之間等效阻力梯度關(guān)系,驗證方法的可行性。
[Abstract]:Metamorphic mechanism is a new field of mechanism research, which brings fresh air to mechanism. The practical metamorphic mechanism in the whole process of metamorphosis is realized by constraints. It is required to provide the corresponding constraints for the metamorphic motion pair in the working structure, and to realize the configuration transformation, retention and motion timing requirements of the mechanism during the working process. It is necessary for us to study the relationship between resistance of metamorphic pairs in the whole process of metamorphosis and to design practical metamorphic mechanism. The main contents of this paper are as follows: first of all, This paper introduces the constraint forms of constrained metamorphic pairs, which include: geometric constraints, resistance constraints, combination constraints, classification of constrained metamorphic pairs, which are divided into geometric constraint pairs of metamorphic motion pairs according to the form of constraints. Drag constrained metamorphic pair and combinatorial constrained pair of metamorphic motion pairs are designed to describe the resistance characteristics of different types of metamorphic pairs. On this basis, the typical space variant pair is introduced, and its resistance characteristics are described. Secondly, the whole process of metamorphosis of constrained metamorphic mechanism is analyzed, and the switching process of constrained pair of metamorphic motion pairs in structural transformation is represented by motion cycle graph, and how the pair of metamorphic motion pairs is equivalent in the process of structural transformation is analyzed. The equivalent resistance gradient model and control mechanism are established. The equivalent resistance gradient curve is used to describe the equivalent process of the metamorphic pair in the process of structural transformation. Finally, based on the analysis of the principle of the metamorphic mechanism of the extended Assur rod group, a metamorphic mechanism analysis method is proposed, in which the extended Assur bar group is equivalent to the Assur bar group in the process of structural state preservation, and the dynamics and kinematics of the mechanism are analyzed. Based on the dynamic static analysis of Assur bar group, a method of analyzing metamorphic motion pair for the whole process of metamorphic cell is put forward. The design of metamorphic motion pair oriented to the whole process of metamorphic cell is carried out by using vc6.0 to transfer the basic bar group program to design the metamorphic motion pair for the whole process of metamorphic cell. According to the equivalent resistance gradient model and the design principle of the metamorphic kinematic pair for the whole process of metamorphic cell, the material transport mechanism is designed, and the resistance characteristics between the variable cell motion pairs are designed, and the kinematics simulation is carried out by establishing a three-dimensional model. The equivalent resistance gradient relationship between constrained metamorphic pairs was verified and the feasibility of the method was verified.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH112

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