本文選題：加熱系統(tǒng)　切入點(diǎn)：精密模壓成型　出處：《深圳大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：隨著光學(xué)電子設(shè)備的需求在航天軍工領(lǐng)域、醫(yī)療健康領(lǐng)域和民生消費(fèi)領(lǐng)域不斷增長(zhǎng),特別是手機(jī)、數(shù)碼相機(jī)、車(chē)載攝像頭、望遠(yuǎn)鏡和醫(yī)療顯微鏡等電子產(chǎn)品的迅猛發(fā)展,不但帶動(dòng)了光學(xué)透鏡的廣泛應(yīng)用,也推動(dòng)了非球面玻璃透鏡的模壓技術(shù)的研究以及相關(guān)模壓設(shè)備的開(kāi)發(fā),使得非球面透鏡向高像素、高精度和輕薄化的方向發(fā)展。美、日、德三國(guó)在非球面光學(xué)玻璃透鏡的研究方面走在世界的前列,研究并開(kāi)發(fā)了相關(guān)的玻璃模壓設(shè)備。我國(guó)在玻璃材料的研究,模壓工藝的改進(jìn),模壓成型模具的結(jié)構(gòu)設(shè)計(jì)以及模具表面鍍層的研究均起步較晚,相關(guān)工程研究人員缺乏,總體水平與世界先進(jìn)技術(shù)還有相當(dāng)大的距離。因此,開(kāi)發(fā)擁有自主知識(shí)產(chǎn)權(quán)的光學(xué)玻璃精密模壓成型設(shè)備,將對(duì)我國(guó)光學(xué)電子產(chǎn)業(yè)有重要的現(xiàn)實(shí)意義。本論文目的是研制一臺(tái)能夠?qū)K-7光學(xué)玻璃進(jìn)行一次模壓成型的光學(xué)玻璃精密模壓成型設(shè)備。設(shè)備的最高加熱溫度為800℃,模壓溫度高于BK-7的轉(zhuǎn)化點(diǎn)溫度,最大模壓力為30kN,加工透鏡的最大直徑為110mm,模壓成型的玻璃透鏡同軸度誤差小于5μm,具有比較高表面質(zhì)量。本論文主要分析了在整個(gè)設(shè)備中加熱系統(tǒng)與模具和機(jī)架的結(jié)構(gòu)關(guān)系以及對(duì)加熱系統(tǒng)的功能參數(shù)進(jìn)行了詳細(xì)的設(shè)計(jì)。在總體結(jié)構(gòu)方面,根據(jù)國(guó)內(nèi)外的先進(jìn)經(jīng)驗(yàn),對(duì)玻璃模壓設(shè)備機(jī)架的高度,模具系統(tǒng)的精度保證,模具、機(jī)架與加熱系統(tǒng)的位置關(guān)系、設(shè)備驅(qū)動(dòng)方式的選擇以及模壓工藝曲線(xiàn)進(jìn)行了設(shè)計(jì)。在加熱系統(tǒng)設(shè)計(jì)方面,分析各種加熱方式的優(yōu)點(diǎn)和缺點(diǎn),選擇短波紅外輻射作為熱源。通過(guò)對(duì)比發(fā)熱管幾種不同布局方式,選擇安裝和調(diào)試都比較方便的半圓型發(fā)熱管。通過(guò)計(jì)算確定加熱系統(tǒng)的功率范圍:10~15kW。對(duì)輻射屏的材料和鍍層進(jìn)行詳細(xì)分析并在其外壁采取安全性更高的水冷裝置來(lái)隔熱。分析石英罩的真空度要求,對(duì)其兩端分別設(shè)計(jì)了O型密封圈的靜密封和Y型密封圈的動(dòng)密封。為了保證密封圈穩(wěn)定的密封性能,對(duì)密封圈設(shè)計(jì)了水冷降溫。通過(guò)仿真對(duì)比不同情況下鍍層對(duì)加熱效率的影響,并通過(guò)對(duì)玻璃坯料的模壓工藝仿真,驗(yàn)證模壓工藝設(shè)計(jì)曲線(xiàn)的可行性并對(duì)上模座的結(jié)構(gòu)設(shè)計(jì)進(jìn)行了優(yōu)化。加熱系統(tǒng)的加熱速率為1~3℃/s,實(shí)驗(yàn)過(guò)程中可以根據(jù)情況選擇合適的加熱速率。前期,在設(shè)備的調(diào)試階段,加熱到600℃左右時(shí),需要大概30分鐘。目前,加熱到最大工作溫度800℃,需要12分鐘左右。
[Abstract]:With the increasing demand for optical and electronic equipment in the field of aerospace military industry, medical and health care and people's livelihood, especially with the rapid development of electronic products such as mobile phones, digital cameras, on-board cameras, telescopes and medical microscopes, It not only drives the extensive application of optical lens, but also promotes the research of molding technology of aspheric glass lens and the development of related moulding equipment, which makes the aspheric lens develop in the direction of high pixel, high precision and thinning. Germany is in the forefront of the study of aspherical optical glass lenses in the world, and has studied and developed related glass moulding equipment. The structural design of die and the study of coating on the surface of die are all started relatively late, the relative engineering researchers are lacking, and the overall level is still quite far from the advanced technology in the world. Development of optical glass precision molding equipment with independent intellectual property rights, The purpose of this paper is to develop an optical glass precision moulding equipment which can be used to mould BK-7 optical glass in one time. The maximum heating temperature of the equipment is 800 鈩，

本文編號(hào)：1620692