本文選題：空間曲線嚙合輪 + 自動化靠模　； 參考：《華南理工大學(xué)》2011年碩士論文

【摘要】：隨著科學(xué)技術(shù)水平和社會生活水平的提高,機電產(chǎn)品微小型化成為趨勢之一。目前,微小型或微型機電系統(tǒng)產(chǎn)品是高附加值的高科技產(chǎn)品。而微小/微傳動機構(gòu)是微小型或微型機電系統(tǒng)產(chǎn)品的關(guān)鍵部件,這使得微小機械傳動技術(shù)的研究開發(fā)以及制造技術(shù)成為目前機械學(xué)科的研究熱點之一。 近年來課題組研究了一種新型傳動機構(gòu)—基于空間曲線嚙合原理的空間曲線嚙合輪傳動機構(gòu)。該機構(gòu)可實現(xiàn)微小空間內(nèi)的連續(xù)傳動,可用于微小機構(gòu)的驅(qū)動裝置。本文在課題組前期建立的考慮鉤桿直徑的空間曲線嚙合方程的基礎(chǔ)上,完成以下主要內(nèi)容: 首先,闡述了微制造技術(shù)的研究意義,介紹了國內(nèi)外微制造技術(shù)的研究現(xiàn)狀以及總結(jié)了課題組之前的研究成果。 針對空間曲線嚙合輪的主動鉤桿與從動鉤桿是空間曲線圓柱體的特點,設(shè)計了一種空間曲線嚙合輪機構(gòu)的制造裝置——自動化靠模機構(gòu),這是一種能夠簡便快捷得到空間曲線嚙合輪的制造方法。不足之處,由于輪體與鉤桿是分開加工,在安裝過程中會產(chǎn)生安裝誤差。 為了克服自動化靠模法的制造精度的不足,首次采用光固化(Stereo Lithograph Apparatus, SLA)快速成型技術(shù)制造出主動輪與從動輪樣品。實驗結(jié)果表明,采用SLA技術(shù)獲得的主動輪與從動輪樣品具有很高的形狀、尺寸精度,能夠?qū)崿F(xiàn)連續(xù)穩(wěn)定地嚙合傳動。不足之處,由于材料選用光敏樹脂,鉤桿強度很低。 為了快速精確制造出符合強度要求的空間曲線嚙合輪機構(gòu),采用選區(qū)激光熔化(Selective Laser Melting, SLM)快速成型技術(shù)制造出主動輪與從動輪樣品。重點提出用選區(qū)激光熔化技術(shù)快速制造空間曲線嚙合輪機構(gòu),再由線切割去除支撐得到主動輪與從動輪樣品。實驗獲得的空間曲線嚙合輪樣品具有很高的形狀、尺寸精度以及強度。 采用選區(qū)激光熔化快速成型設(shè)備與316L不銹鋼粉末,得到的空間曲線嚙合輪樣品表面粗糙度值較大,無法達到傳動要求。采用機械噴砂與電解拋光相結(jié)合的后處理工藝對嚙合輪表面進行加工,加工后的嚙合輪樣品的表面粗糙度值從Ra 25μm減小到Ra 1.0μm。實驗結(jié)果表明,采用的后處理工藝和參數(shù)獲得的主動輪與從動輪樣品具有很高的形狀、尺寸精度,在一定的載荷下能夠?qū)崿F(xiàn)連續(xù)穩(wěn)定地嚙合傳動。 通過對靠模法、SLA、SLM三種制造方法的比較,得到SLM成型工藝以及機械噴砂與電解拋光相結(jié)合的后處理工藝和參數(shù),是空間曲線嚙合輪的一種較好的制造方法。
[Abstract]:With the improvement of science and technology and social living standards, the miniaturization of electromechanical products has become one of the trends. At present, micro-or micro-electromechanical system products are high-added high-tech products. The micro / micro transmission mechanism is the key component of micro or micro electromechanical system products, which makes the research and development of micro mechanical transmission technology and manufacturing technology become one of the research hotspots in the field of machinery. In recent years, a new type of transmission mechanism, spatial curve meshing wheel transmission mechanism based on the principle of space curve meshing, has been studied by our research group. The mechanism can realize continuous transmission in small space and can be used for driving device of micro mechanism. On the basis of the space curve meshing equation with the diameter of hook rod established by our research group, the main contents are as follows: Firstly, the research significance of micromanufacturing technology is expounded, the research status of micromanufacturing technology at home and abroad is introduced, and the research results before the research group are summarized. In view of the fact that the active hook rod and the follower hook bar of the space curve meshing wheel are the space curve cylinder, a kind of manufacturing device of the space curve meshing wheel mechanism-automatic modeling mechanism is designed. This is a simple and fast manufacturing method to obtain the space curve meshing wheel. Because the wheel body and the hook rod are processed separately, the installation error will occur in the installation process. In order to overcome the shortage of the manufacturing accuracy of the automatic modeling method, the samples of the active wheel and the slave wheel were first fabricated by using the light curing Stereo Lithograph Apparatus (slaa) rapid prototyping technology. The experimental results show that the active wheel and the sample of the slave wheel obtained by SLA technology have high shape and precision, and can realize the continuous and stable meshing transmission. The deficiency, because the material chooses Guang Min resin, the hook pole strength is very low. In order to rapidly and accurately fabricate the spatial curve meshing wheel mechanism in accordance with the strength requirements, the selective laser melting Laser melting (SLM) rapid prototyping technology was used to fabricate the samples of the active wheel and the slave wheel. The special area laser melting technology is used to fabricate the space curve meshing wheel mechanism, and then the active wheel and the moving wheel sample are obtained by wire-cutting. The space curve meshing wheel samples obtained from the experiment have high shape, dimensional accuracy and strength. By using selective laser melting rapid prototyping equipment and 316L stainless steel powder, the surface roughness of the surface of the meshing wheel with space curve is large, which can not meet the requirements of transmission. The surface roughness of the meshing wheel was reduced from Ra 25 渭 m to Ra 1.0 渭 m by the post-treatment process combined with mechanical sand blasting and electrolytic polishing, and the surface roughness of the meshing wheel was reduced from Ra 25 渭 m to Ra 1.0 渭 m. The experimental results show that the active wheel and the slave wheel obtained by the post-treatment process and the parameters have high shape and precision, and can realize the continuous and stable meshing transmission under certain load. By comparing the three manufacturing methods of SLA-SLM, the SLM forming process and the post-treatment process and parameters of mechanical sand blasting and electrolytic polishing are obtained, which is a better manufacturing method for space curve meshing wheel.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH132.4

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