非球面光學零件是壹種非常重要的光學零件，常用的有拋物面鏡、雙曲面鏡、等。非球面光學零件可以獲得球面光學零件所無法比擬的良好的成像質量，在光學系統中可以很好的矯正多種像差,改善成像質量,提高系統鑒別能力,它可以以壹個或幾個非球面零件來代替多個球面零件,從而達到簡化儀器結構、降低成本的目的，並且有效地減輕了儀器的重量，所以目前我們對於高質量高精度的非球面零件的需求與日俱增。
目前，非球面零件的制造面臨著加工成本高、加工效率低的難題，尤其是非球面零件中的楔形非球面零件，因為其底面並不是水平面，所以在用砂輪磨削工件上表面的過程中面臨著加工難度大的問題，因此就需要壹種能夠改變工件相對位置的夾具——用於楔形非球面磨削加工的三軸旋轉式夾具，使工件在被加工時處於相對水平的位置，從而降低工件的加工難度。
本文的主要工作包括：根據楔形非球面的加工需求，設計了組合桿式旋轉夾具、凸輪式旋轉夾具的結構方案。討論了這兩個方案的優點與缺點，研究夾具的夾緊機構；重點分析平口鉗夾緊機構和斜楔式夾緊機構，通過對這兩個方案的介紹與比較，從而引申出了最終方案。為了了解最終方案的性能參數，對夾具中的伺服電機、減速器及軸承做了選型；對上平臺軸與下平臺軸的直徑做了估算，計算了上平臺軸、下平臺軸、旋轉軸的慣性矩、剛度、切應力以及強度，同時計算了軸承的變形及剛度。
翻譯：
Aspheric optical parts is a kind of optical parts is very important, commonly used in a parabolic mirror, hyperbolic mirror, etc.. Aspheric optical parts can get good imaging quality aspheric optical parts are incomparable, good correction of aberration in the optical system, to improve the quality of image, enhance the ability of the system identification, it can be one or several aspheric parts to replace a plurality of spherical surface parts, thereby simplifying the structure, reducing the purpose of cost, and effectively reduces the weight of the instrument, so we for the high quality and high precision aspheric parts demand grow with each passing day.
At present, manufacturing aspheric parts facing problems of high processing cost, processing efficiency is low, especially aspheric parts of wedge aspheric parts, because the bottom surface is not level, so the grinding on the workpiece surface in the process of facing the problems of difficult processing, hence the need for a to change the relative position of the fixture workpiece -- for three axis rotary clamping wedge Aspheric Grinding Machining, the workpiece is relative to a horizontal position to be processed, thereby reducing the difficulty of processing workpiece.
The main work of this paper includes: according to the processing demand wedge aspheric surface, design the structure scheme combined rod rotary clamp, cam type rotary fixture. Discuss the advantages and disadvantages of the two schemes of fixture, clamping mechanism; focus on flat-nose pliers clamping mechanism and a wedge clamping mechanism, through the introduction and comparison of the two schemes, which raises the final scheme. In order to understand the performance parameters of the final solution, the selection of servo motor, reducer and bearings in fixture; on the platform and the lower platform shaft shaft diameter do estimated, on the platform, platform shaft, shaft rotation axis moment of inertia, stiffness, shear stress and strength calculation, at the same time calculation the bearing deformation and stiffness.