【導讀】用夾具裝夾工件可以保證加工精度，降低人工等級，提高勞動生產(chǎn)率和。降低加工成本，擴大機床工藝范圍等作用，使得操作方便、安全。設計過程，并對夾具的工作原理及動作說明作了簡要說明。在技術路線中，通過。誤差、夾緊力和夾具的定位精度的計算。這次畢業(yè)設計是我們在畢業(yè)之前對所學。各課程的一次深入、綜合性的總復習，為以后的設計工作提供了一個指導。

　　

【正文】 了大學四年所學的相關專業(yè)知識，同時也 深刻體會到學習的重要性并領會到設計也是一種學習的方式。在設計的過程中，我們綜合運用了系統(tǒng)的設計方法和相關設計軟件（如AutoCAD），且應用熟悉相關設計資料（包括手冊、標準和規(guī)范等）以及進行經(jīng)驗估算等方面有了一定程度的提高，深刻的感受到計算機和工具書及手冊在設計中帶來的便利和幫助。 這次機畢業(yè)設計使我們 更加系統(tǒng)的了解 夾具設計 的一般過程，并且學會了對 夾具 設計的整體把握，也有了較為嚴謹?shù)目茖W設計方法。在本次 畢業(yè) 設計中， 能 熟練 運用 大學四年 所學 的 基本理論知識，正確解決工件在加工時的定位和夾緊問題，選擇合理的 設計 方案 ，進行必要的 定位誤差和夾緊力的 計算，根據(jù) 課 題設計出符合 要求 、 優(yōu)質(zhì)、高效、低成本的夾具。 并明確 了 工序要求，了解所用 的鏜 床，刀具及加工情況 ，所以，這次畢業(yè)設計對我來說收獲很大。但也有很多地方還有 待進一步的改進 。 如果可以將移動壓板環(huán)節(jié) 由手動改為自動，本次夾具設計將會更加理想。 洛陽理工學院畢業(yè)設計論文 34 謝 辭 本 次 畢業(yè)設計是在 楊 老師的指導下完成的，衷心感謝 楊 老師的悉心指導以及在 知識層面 上給予的 指點， 對我的設計提出了許多改進的建議，并且對我的設計方案，圖形繪制等提出了許多寶貴的建議。 同時，我深深感謝我們 機械 工程學院的領導和老師， 使 我在思維方法、學習態(tài)度和工作作風方面得到的指導和影響；對我能順利完成畢業(yè)設計給予了很大的幫助。 再次，也非常感謝學校能給我這次機會來進行我的畢業(yè)設計，讓我把書本上的知識運用的實踐中去，讓我深刻的體會到了 “ 學以致用 ” 的道理。讓我在實踐中豐富和充實了自己。 最后， 深深地感謝支持、理解和關心我的同學們，讓我圓滿完成了畢業(yè)設計所 要求 的 所有 任務。 洛陽理工學院畢業(yè)設計論文 35 參考文獻 [1]趙雪松，任小中，于華 .機械制造裝備設計 .武漢：華中科技大學出版社， 2021 [2]趙雪松，趙曉芬 .機械制造技術基礎 . 武漢：華中科技大學出版社，2021 [3]王昆 , 何小柏 , 汪信遠 . 機械設計課程設 計 . 北京： 高等教育出版社， 1996 [4]浦林祥 .金屬切削機床夾具設計手冊 .北京：機械工業(yè)出版社， 1995 [5]孟憲棟，劉彤安 ． 普通高等?？平逃龣C電類規(guī)劃教材 機床夾具圖冊 .北京：機械工業(yè)出版社， 1995 [6]孫已德 ． 高等?？茖W校試用教材機床夾具圖冊 .北京：機械工業(yè)出版社， 1996 [7]何貢，顧勵生 ,陳桂賢 ． 公差與配合選用圖冊 .北京：機械工業(yè)出版社， 1997 [8]肖繼德，陳寧平 ． 機床夾具設計， 第 2 版 . 北京：機械工業(yè)出版社，1997 [9]宋殷 ． 高等工程學校教材機床夾具設計，第 2 版 . 武漢：華中理工大學出版社， 1998 [10]王秀倫，邊文義，張運祥 ． 機床夾具設計 .北京：中國鐵道出版社，1995 [11]肖繼德，陳寧平 ． 普通高等?？平逃龣C電類規(guī)劃教材機床夾具設計，第 2 版 .北京：機械工業(yè)出版社 ,1999 [12]哈爾濱工業(yè)大學，上海工業(yè)大學 ． 機床夾具設計 ． 上海：上海科技大學出版社， 1995 [13]張士良 ． 機械設計制圖手冊，第 1 版 ． 上海：同濟大學出版社 ， [14]楊黎明 ． 機床夾具設計手冊 ， 第 1 版 . 北京 :國防工業(yè)出版社 , [15]林文 煥 ,陳本通 ． 機床夾具設計 .北京： 國防工業(yè)出版社 , [16]成大先 ． 機床夾具設計手冊 ，第 5 版 .北京：化學工業(yè)出版社 , [17]王小華 ． 機床夾具圖冊 .北京：機械工業(yè)出版社， 洛陽理工學院畢業(yè)設計論文 36 [18]王光斗， 王春福 ． 機床夾具設計手冊 . 上海： 上海科學技術出版社 ，2021， 8 [19]Stephen,Dennis Improvements all around makes good modeler better,Machine ,2021(5)8081 [20] Halpern, Marc， Pro/E39。s continuing surge CAE, ComputerAided Engineering, Mar, 1997(5):4548 洛陽理工學院畢業(yè)設計論文 37 外文資料翻譯 Application and development Of case based reasoning in fixture design Fixtures are devices that serve as the purpose of holding the workpiece securely and accurately, and maintaining a consistent relationship with respect to the tools while machining. Because the fixture structure depends on the feature of the product and the status of the process planning in the enterprise, its design is the bottleneck during manufacturing, which restrains to improve the efficiency and leadtime. And fixture design is a plicated process, based on experience that needs prehensive qualitative knowledge about a number of design issues including workpiece configuration, manufacturing processes involved, and machining environment. This is also a very time consuming work when using traditional CAD tools (such as Unigraphics, CATIA or Pro/E), which are good at performing detailed design tasks, but provide few benefits for taking advantage of the previous design experience and res ources, which are precisely the key factors in improving the efficiency. The methodology of case based reasoning (CBR) adapts the solution of a previously solved case to build a solution for a new problem with the following four steps: retrieve, reuse, revise, and retain [1]. This is a more useful method than the use of an expert system to simulate human thought because proposing a similar case and applying a few modifications seems to be self explanatory and more intuitive to humans .So various case based design support tools have been developed for numerous areas[24], such as in injection molding and design, architectural design, die casting die design, process planning, and also in fixture design. Sun used six digitals to pose the index code that incl uded workpiece shape, machine portion, bushing, the 1st locating device, the 2nd locating device and 洛陽理工學院畢業(yè)設計論文 38 clamping device[5]. But the system cannot be used for other fixture types except for drill fixtures, and cannot solve the problem of storage of the same index code that needs to be retained, which is very important in CBR[6]. 1. Construction of a Case Index and Case Library Case index The case index should be posed of all features of the workpiece, which are distinguished from different fixtures. Using all of them would make the operation in convenient. Because the forms of the parts are diverse, and the technology requirements of manufacture in the enterprise also develop continuously, lots of features used as the case index will make the search rate slow, and the main feature unimportant, for the reason that the relative weight which is allotted to every feature must diminish. And on the other hand, it is hard to include all the features in the case index. Hierarchical form of Case The structure similarity of the fixture is represented as the whole fixture similarity, ponents similarity and ponent similarity. So the whole fixture case library, ponents case library, ponent case library of fixture are formed correspondingly. Usually design information of the whole fixture is posed of workpiece information and workpiece procedure information, which represent the fixture satisfying the specifically designing function demand. The whole fixture case is made up of function ponents, which are described by the function ponents’ names and numbers. The ponents case represents the members. (function ponent and other structure ponents ， main driven parameter, the number, and their constrain relations.) The ponent case (the lowest layer of the fixture) is the structure of function ponent and other ponents. In the modern fixture design there are lots of parametric standard parts and mon non standard parts. So the ponent case library should record the specification parame ter and the way in which it keeps them. 2. Strategy of Case Retrieval 洛陽理工學院畢業(yè)設計論文 39 In the case based design of fixtures ,th