【摘要】：復(fù)合材料彎管是典型的非軸對(duì)稱零部件,它的生產(chǎn)難度大,是因?yàn)槠湟?guī)格系列多、形狀結(jié)構(gòu)復(fù)雜。制約玻璃鋼管道發(fā)展的主要因素并不是管道的性能,而是管道的配件跟不上。目前生產(chǎn)所需的復(fù)合材料彎管生產(chǎn)效率低,質(zhì)量也難以保證。隨著復(fù)合材料彎管在化工企業(yè)的推廣使用,中小口徑的彎管用量愈來愈大,迫切需要用機(jī)器纏繞復(fù)合材料彎管,實(shí)現(xiàn)自動(dòng)化生產(chǎn)彎管。因此需研究開發(fā)新的纏繞技術(shù)包括纏繞機(jī)的結(jié)構(gòu)設(shè)計(jì)、新的穩(wěn)定纖維路徑的設(shè)計(jì)與計(jì)算、非軸對(duì)稱體的纏繞模式設(shè)計(jì)等。 纖維纏繞成型技術(shù)的難點(diǎn)在于纖維纏繞線型的設(shè)計(jì)。標(biāo)準(zhǔn)的纖維纏繞回轉(zhuǎn)體線型設(shè)計(jì)已經(jīng)趨于成熟,對(duì)于一些非回轉(zhuǎn)體的異型面的纏繞線型研究仍存在很多難點(diǎn),如架空問題和纏繞不均勻的問題。彎管由圓柱段和圓環(huán)段組成。本課題將利用圓環(huán)面上的測(cè)地線和圓柱面上的非測(cè)地線和曲面樣條生成彎管的纏繞路徑,通過在端頭加入停留纏繞,控制好落紗點(diǎn),給出彎管纏繞的代數(shù)模式,就能走出穩(wěn)定的纏繞線型,防止滑線的現(xiàn)象產(chǎn)生,從而實(shí)現(xiàn)復(fù)合材料彎管纏繞軌跡的設(shè)計(jì)和均勻覆蓋。 本文將設(shè)計(jì)微機(jī)控制的五軸臥式纖維纏繞機(jī)來實(shí)現(xiàn)彎管的纏繞。五軸彎管數(shù)控纏繞機(jī)的結(jié)構(gòu)主要由四大部分組成：纏繞小車、小車底座、機(jī)頭裝置和尾架頂尖裝置。其中纏繞小車機(jī)構(gòu)是最為復(fù)雜的設(shè)計(jì)部分,在纏繞彎管過程中,小車要實(shí)現(xiàn)在底座上橫向平移、縱向進(jìn)給運(yùn)動(dòng),絲嘴的旋轉(zhuǎn)運(yùn)動(dòng)以及絲嘴在豎直方向上的垂直升降運(yùn)動(dòng)。在Pro/E中完成了纏繞機(jī)四個(gè)部件的設(shè)計(jì),并分析了五軸的運(yùn)動(dòng)對(duì)于彎管芯模纏繞的作用,選擇合理的傳動(dòng)方案實(shí)現(xiàn)五軸的聯(lián)動(dòng)。小車架上承受整個(gè)小車的重量,為防止嚴(yán)重變形現(xiàn)象的發(fā)生,影響纏繞機(jī)的正常工作,因此對(duì)小車架在ANSYS中進(jìn)行結(jié)構(gòu)剛度的分析。 最后利用Pro/E中機(jī)構(gòu)運(yùn)動(dòng)仿真模塊Pro/Mechanism對(duì)彎管纏繞機(jī)的纏繞過程進(jìn)行仿真。將二維圖紙?jiān)O(shè)計(jì)中很難表達(dá)的機(jī)構(gòu)運(yùn)動(dòng)分析運(yùn)用三維動(dòng)畫表達(dá),使之變得非常直觀、簡(jiǎn)捷高效。彎管纏繞機(jī)的運(yùn)動(dòng)仿真能夠簡(jiǎn)化機(jī)構(gòu)的設(shè)計(jì)開發(fā)過程,優(yōu)化產(chǎn)品設(shè)計(jì)質(zhì)量,縮短產(chǎn)品的整個(gè)開發(fā)周期。
[Abstract]:Composite bend pipe is a typical non-axisymmetric part. It is difficult to produce because of its many series of specifications and complicated shape and structure. The main factor restricting the development of FRP pipes is not the performance of the pipes, but the failure of the fittings of the pipes. At present, the production efficiency of composite bend pipe is low and the quality is difficult to guarantee. With the popularization and application of composite pipe in chemical enterprises, the amount of medium and small diameter bend pipe is increasing, so it is urgent to use machine to winding composite bend pipe to realize automatic production of bend pipe. Therefore, it is necessary to research and develop new winding technology, including the structure design of winding machine, the design and calculation of new stable fiber path, the winding mode design of non-axisymmetric body and so on. The difficulty of filament winding is the design of filament winding line. The design of standard filament winding rotary body has become mature, and there are still many difficulties in the study of non-rotating surface winding, such as the problem of overhead and the problem of unevenness of winding. The elbow consists of a cylindrical section and a ring section. This subject will use the geodesic line on the circular surface and the non-geodesic and curved spline on the cylindrical surface to generate the winding path of the bend pipe. By adding the entrainment at the end of the pipe to control the yarn drop point, the algebraic model of the winding of the bend pipe will be given. It can walk out of the stable winding line, prevent the phenomenon of sliding line, and realize the design and uniform covering of the winding track of the composite pipe. In this paper, a five-axis horizontal filament winding machine controlled by microcomputer is designed to realize winding of bend pipe. The structure of five-axis tube winding machine is mainly composed of four parts: winding trolley, base, head device and tail frame center device. The winding mechanism is the most complex part of the design. In the process of winding the winding pipe, the vehicle should realize the lateral translation on the base, the longitudinal movement of feed, the rotation of the thread tip and the vertical lifting movement of the tip in the vertical direction. The design of four parts of winding machine is completed in Pro/E, and the effect of five-axis motion on winding of pipe core die is analyzed, and a reasonable transmission scheme is selected to realize the linkage of five axes. In order to prevent the serious deformation and affect the normal operation of the winding machine, the frame is subjected to the weight of the whole car. Therefore, the structural stiffness of the frame is analyzed in ANSYS. Finally, the winding process of the winding machine is simulated by the mechanism motion simulation module (Pro/Mechanism) in Pro/E. The mechanism motion analysis, which is difficult to express in 2D drawing design, is expressed by 3D animation, which is very intuitive, simple and efficient. The motion simulation of the winding machine can simplify the design and development process of the mechanism, optimize the quality of the product design, and shorten the whole development period of the product.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH136

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