本文選題：槳葉增強帶 + 纏繞成型　； 參考：《大連理工大學》2015年碩士論文

【摘要】：復合材料槳葉增強帶是直升機主旋翼系統(tǒng)中的核心承力構件,是決定直升機動力水平的關鍵因素。纏繞成型技術適合于高強度纖維增強復合材料構件的制造,但傳統(tǒng)纏繞方法及工裝難以滿足槳葉增強帶特殊的復雜幾何形狀要求,且存在產品質量不穩(wěn)定、成型效率低、型號擴展性差和工人勞動強度大等諸多問題。本文根據多種規(guī)格型號槳葉增強帶的外形尺寸和力學性能等要求,在對多種基于傳統(tǒng)帶纏繞、帶鋪放等自動化成型工藝方案設計和分析的基礎上,進行工藝優(yōu)化與開發(fā),提出一種新型變長度芯模纏繞成型工藝方法。對應用設計的纏繞工藝的成形件外廓進行數學描述,檢驗對于增強帶的幾何可行性,提出纖維預浸帶張力與疊層壓緊力的力學模型與恒力控制方案。根據提出的工藝方法,進行槳葉增強帶纏繞成型裝備的總體方案設計,并在此基礎上,完成對機身、高速長行程直線運動機構、纏繞梭及其夾具等零部件結構設計。其中機身設計為可保證主體床身與夾具工況相對位置精度的一體組合式；運動執(zhí)行機構設計為具有消振功能的輕型鋁制兩軸移動臺；夾具的設計為適合多種纏繞梭規(guī)格型號,且具有六工位轉換功能的纏繞梭托架。對裝備的工作執(zhí)行單元-纏繞頭系統(tǒng)進行功能分析,對基于收放料卷徑時變特征的纏繞頭進行運動學與力學計算,根據理論結果提出創(chuàng)新性的輪系結構和恒力控制裝置等設計理念,設計出包括預浸帶恒張力放卷機構、PE隔離膜穩(wěn)張力收卷機構和兼?zhèn)銫軸功能的氣動式壓緊力施力機構等內部組件的纏繞頭系統(tǒng)；對纏繞裝備中關鍵支撐部件-繞梭托架滾轉架體和懸臂式Y向運動機構進行靜力學剛度分析,并從多個角度進行結構優(yōu)化設計。對纏繞執(zhí)行機構進行運動學與動力學建模,對纏繞頭運行過程進行仿真,分析纏繞頭運動軌跡、啟停加速度等運動學特性對纖維預浸帶壓緊力的影響,根據模擬結果對纏繞軌跡進行優(yōu)化設計。本文的研究工作為復合材料槳葉增強帶的高質高效纏繞成型提供了一套合理可靠的技術方案,突破國外長期以來的技術封鎖,顯著提升我國復合材料槳葉構件纏繞成型技術水平。
[Abstract]:Composite blade reinforced belt is the core component of helicopter rotor system and the key factor to determine helicopter power level. The winding molding technology is suitable for the manufacture of high strength fiber reinforced composite components, but the traditional winding methods and tools can not meet the special complex geometric requirements of blade reinforcement, and the product quality is unstable and the forming efficiency is low. Model expansion poor and labor intensity of workers and many other problems. In this paper, according to the requirements of shape, dimension and mechanical properties of various types of blade reinforcement belts, the process optimization and development are carried out on the basis of the design and analysis of various automatic forming process schemes based on traditional strip winding and strip laying. A new winding process for variable length core die is presented. In this paper, a mathematical description of the shape profile of the winding process is carried out, and the geometric feasibility of the reinforced strip is tested. A mechanical model and a constant force control scheme for the tension and laminated compression force of the fiber prepreg strip are put forward. According to the proposed technology, the overall scheme design of the winding forming equipment of the blade reinforced belt is carried out, and on this basis, the structure design of the fuselage, the linear motion mechanism with high speed and long stroke, the winding shuttle and its fixture are completed. The fuselage design is a combination type which can guarantee the relative position accuracy between the main body of the bed and the working conditions of the fixture; the motion actuator is designed as a light aluminum two-axis mobile platform with damping function; the fixture is designed for various types of winding shuttles. And has a six-position conversion function of the winding shuttle bracket. The functional analysis of the working execution unit of the equipment, the winding head system, and the kinematics and mechanics calculation of the winding head based on the time-varying characteristics of the winding diameter are carried out. According to the theoretical results, the innovative design concepts such as gear train structure and constant force control device are put forward. The winding head system is designed, which includes prepreg belt constant tension unwinding mechanism, PE isolating film stable tension winding mechanism and pneumatic compaction force mechanism with C axis function. The statics stiffness of the key supporting parts in winding equipment, the bobbin and the cantilever Y moving mechanism, is analyzed, and the structural optimization design is carried out from many angles. The kinematics and dynamics of the winding actuator are modeled, the operation process of the winding head is simulated, and the influence of the kinematic characteristics of the winding head, such as the trajectory of the winding head and the acceleration of the starting and stopping, on the compression and tightening force of the fiber prepreg belt is analyzed. According to the simulation results, the winding trajectory is optimized. The research work in this paper provides a set of reasonable and reliable technical scheme for the high quality and high efficiency winding molding of composite blade reinforced belt, and breaks through the technical blockade of foreign countries for a long time. The technology level of composite blade winding molding is improved significantly in China.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：V262.3;TB33

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本文編號：1841343