【正文】 r more information please refer (Zhen, H.。s size Selection of mechanism and coordinate systemThe selection of mechanism type is the first step for designing novel engraving machine, the following reasons make us select the 6PUS parallel mechanism for designing our engraving machine. Comparing with traditional mechanism, 6PUS parallel mechanism uses base platform, three uprights layout and high rigidity framework structure and has the merits such as high modularization, high accuracy and low cost. Itsmodel is shown in .Fig. 1. The model of 6PUS parallel mechanismAs shown in , 6PUS parallel mechanism consists of base platform, dynamic platform and 6 branch chains with same structure, every branch joins with base platform through prismatic pairs (P), slider of prismatic pairs joins with up end of the fixed length link through universal joint (U), down end of the fixed length link joins with dynamic platform through sphere hinge (S), so it is called 6PUS parallel mechanism. The coordinate system of 6PUS parallel engraving mechanism is shown in Fig. 2. In , the geometry centers of base platform and dynamic platform plane are supposed as OB and op respectively. In every branch, the centers of prismatic pairs, universal joint and sphere hinge are marked with Ai, Bi, and Ci (i = 1,2, ..., 6) respectively. Coordinate system OBXBYBZB is fixed on base platform, taking {B} as briefly. The origin of {B} lies on geometry center of base platform39。 Yingxue, Y. amp。 Taylor, K. amp。 Yuefa, F., 1997). According to the characteristics of parallel mechanism, it has been a hot research topic to apply parallel mechanism to the domain of future machining. By applying parallel mechanism to engraving domain, its inherent advantages can be fully exerted and the disadvantages of conventional engraving machine can be overe or pensated. But as the special structure of parallel mechanism, the related theory and technology during its engraving is very different from that of conventional engraving machine, and it is a undeveloped research topic by now. In addition, with the development of puter network technology, the new concept and method such as network machining and manufacturing has bee hot research topic (GQ, Huang amp。指導教師意見 指導教師簽名：年 月 日教研室（學科組、研究所）意見 教研室主任簽名： 年 月 日系意見 主管領(lǐng)導簽名： 年 月 日英文原文Research on a Novel Parallel Engraving Machine and its Key TechnologiesAbstract: In order to pensate the disadvantages of conventional engraving machine and exert the advantages of parallel mechanism, a novel parallel engraving machine is presented and some key technologies are studied in this paper. Mechanism performances are analyzed in terms of the first and the second order influence coefficient matrix firstly. So the sizes of mechanism, which are better for all the performance indices of both kinematics and dynamics, can be confirmed and the restriction due to considering only the first order influence coefficient matrix in the past is broken through. Therefore, the theory basis for designing the mechanism size of novel engraving machine with better performances is provided. In addition, method for tool path planning and control technology for engraving force is also studied in the paper. The proposed algorithm for tool path planning on curved surface can be applied to arbitrary spacial curved surface in theory, control technology for engraving force based on fuzzy neural network (FNN) has well adaptability to the changing environment. Research on teleoperation for parallel engraving machine based on B / S architecture resolves the key problems such as control mode, sharing mechanism for multiuser, realtime control for engraving job and realtime transmission for video information. Simulation results further show the feasibility and validity of the proposed methods. Keywords: parallel mechanism, engraving machine, influence coefficient, performance indices, tool path planning, force control, fuzzy neural network, teleoperation1 IntroductionConventional puter engraving machine has played an important role in industries such as machinery machining, printing and dyeing and entertainment, but it has the inherent disadvantages such as cutting tool can be fed only along the fixed guideway, lower degreeoffreedom (DOF) of cutting tool, lower flexibility and mobility for machining etc. Parallel mechanism has the merits such as high mechanical stiffness, high load capacity, high precision, good dynamic performance etc (Zhen, H.。已具備的條件和尚需解決的問題① 現(xiàn)已查閱到數(shù)控雕刻機改造的相關(guān)資料。② 機床的三軸運動形式采用刀具Y/Z軸進給運動，工作臺作X軸進給運動的定梁式結(jié)構(gòu)，增強了加工的穩(wěn)定性，保證了加工精度。預期成果：數(shù)控雕刻機機械結(jié)構(gòu)總體裝配圖及主要零部件圖，完成設(shè)計說明書的撰寫。2013年4月12日2013年4月25日：完成有關(guān)零部件的選型及校核計算，并校驗圖紙。2013年3月8日2013年3月12日：按照要求修改畢業(yè)設(shè)計開題報告。研究計劃及預期成果研究計劃：2012年11月17日2013年1月13日：按照任務(wù)書要求查閱論文相關(guān)參考資料，填寫 畢業(yè)設(shè)計開題報告書，學習并翻譯一篇與畢業(yè) 設(shè)計相關(guān)的英文材料。查閱有關(guān)雕刻機的資料，對其主要零件進行校核。擬采取的研究方法、技術(shù)路線、實驗方案及可行性分析 到數(shù)控雕刻機加工工廠參觀，增強對雕刻機系統(tǒng)和結(jié)構(gòu)的認識，構(gòu)思機床外部結(jié)構(gòu)。其中，隨著觸摸屏手機、平板電腦的滲透率不斷提高，未來消費類電子產(chǎn)品零配件制造行業(yè)對數(shù)控雕刻機需求將持續(xù)快速增長，到2015年，僅消費類電子產(chǎn)品零配件制造行業(yè)，對數(shù)控雕刻機需求量就將達到38000臺。結(jié)合各下游行業(yè)十二五規(guī)劃制定的發(fā)展目標，羅百輝預計到2015年全國數(shù)控雕刻機產(chǎn)銷量將達到12萬臺。隨著下游各應(yīng)用領(lǐng)域?qū)Ξa(chǎn)品加工過程中的高精密、高效率、低耗能、低耗材的要求不斷提升，數(shù)控雕刻機自身技術(shù)不斷成熟，下游新興應(yīng)用領(lǐng)域不斷涌現(xiàn)，國內(nèi)人工成本的不斷增長，原有老舊設(shè)備的更新?lián)Q代等等，都將對數(shù)控雕刻機市場起到積極的推動作用。隨著數(shù)控雕刻機技術(shù)的不斷成熟和價格趨于合理，其性價比逐漸得到業(yè)界的認可，市場快速擴大。隨著數(shù)控雕刻機應(yīng)用領(lǐng)域的不斷拓展，其市場規(guī)模也不斷擴大。（2）數(shù)控雕刻機的研究狀況及其發(fā)展前景數(shù)控雕刻機以自身所具有的技術(shù)優(yōu)勢，加上合理的價格，已成為我國消費類電子零配件制造、小型精密模具制造、PCB電路板、五金制品、家具制造等行業(yè)重要的機床工具。隨著模具工業(yè)和工藝美術(shù)品制造業(yè)的快速發(fā)展，國內(nèi)外市場對數(shù)控雕刻機的需求不斷擴大，特別是高端的數(shù)控雕銑中心，需求更為旺盛。大都認為雕刻機是使用小刀具、大功率和高速主軸電機的數(shù)控銑床。全套設(shè)計（圖紙）請聯(lián)系 174320523 各專業(yè)都有編號無錫太湖學院畢業(yè)設(shè)計（論文）相關(guān)資料題目： 定梁式數(shù)控雕刻機機械結(jié)構(gòu)設(shè)計 信機 系 機械工程及自動化專業(yè)學