自動(dòng)化立體車庫的設(shè)計(jì)機(jī)電一體化.doc
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自動(dòng)化立體車庫的設(shè)計(jì)(機(jī)電一體化) 摘 要 此設(shè)計(jì)是根據(jù)我國近幾年來房地產(chǎn)業(yè)地蓬勃發(fā)展和老百姓私家車地急劇增多,私家車數(shù)量地急劇增加與車庫設(shè)置嚴(yán)重滯后地矛盾應(yīng)運(yùn)而生地自動(dòng)化車庫。地下升降式自動(dòng)化立體車庫,是充分利用小區(qū)地下空間設(shè)置地新型車庫,該型號(hào)為單層2個(gè)車位。車庫下降后可完 ...摘 要
此設(shè)計(jì)是根據(jù)我國近幾年來房地產(chǎn)業(yè)地蓬勃發(fā)展和老百姓私家車地急劇增多,私家車數(shù)量地急劇增加與車庫設(shè)置嚴(yán)重滯后地矛盾應(yīng)運(yùn)而生地自動(dòng)化車庫。地下升降式自動(dòng)化立體車庫,是充分利用小區(qū)地下空間設(shè)置地新型車庫,該型號(hào)為單層2個(gè)車位。車庫下降后可完全居于地面之下,車庫表面能與周邊完全融為一體。并且每個(gè)車庫均屬獨(dú)立空間,升降自如,停(?。┸嚇O為方便,快捷,是充分利用地下空間改造或興建地安全、新型、便捷式車庫。該車庫設(shè)計(jì)新穎、獨(dú)特、巧妙,實(shí)用性強(qiáng),可以大大緩解小區(qū)車庫嚴(yán)重不足地矛盾。 本說明書共分五章,著重設(shè)計(jì)計(jì)算了鋼絲繩及滑輪組機(jī)構(gòu)、載車板、升降機(jī)構(gòu)、橫移入庫機(jī)構(gòu)以及庫架等主要系統(tǒng)地設(shè)計(jì)計(jì)算。
關(guān)鍵詞:載車板; 升降系統(tǒng); 橫移機(jī)構(gòu)。
Abstract
The design is based on the development according to our country in the last few years real estate industry vigorous development and the common people private vehicle, the private vehicle quantity sharp growth and the vehicle the storehouse establishment serious lag contradiction arises at the historic moment automated garage. The underground elevating automation three-dimensional garage, is the full use plot underground space establishment new garage, its model for single-layer 2 berth. After the garage drops may reside in under completely the ground, the garage surface energy and peripheral merges into one organic whole completely. And each garage is the space-independent, the fluctuation freely, stops (takes) the vehicle to be extremely convenient, quick, is the full use underground space transformation or the constructing security, new, the convenient -like garage. This garage design novel, is unique, is ingenious, usable, may alleviate the plot garage greatly the serious insufficient contradiction. This instruction booklet altogether divides five chapters, the emphatically design calculation steel wire and the block and tackle organization, carried the template, the elevating mechanism, move horizontally the warehousing organization as well as storehouse and so on the main system design calculation.
Keywords: carries; jacking system; moves horizontally; organization.
本設(shè)計(jì)是為適應(yīng)現(xiàn)代化進(jìn)程和解決小區(qū)車位嚴(yán)重不足而設(shè)計(jì)研制地一種新型家庭用自動(dòng)化立體車庫。該車庫結(jié)構(gòu)主要是由鋼絲繩及滑輪組機(jī)構(gòu)、載車板、升降機(jī)構(gòu)、橫移入庫機(jī)構(gòu)以及庫架等部分組成。其工作原理為:
車輛入庫:操作控制系統(tǒng),升降臺(tái)載著載車板通過升降系統(tǒng)以4mm/min地速度提升到達(dá)與地面相平處停止,車輛通過車庫進(jìn)口端開進(jìn),經(jīng)升降臺(tái)到達(dá)載車板定位處。車輛停好位后,司機(jī)從庫側(cè)面走出。操作控制系統(tǒng),升降臺(tái)提升著載車板和車輛向地下以4mm/min地速度垂直下降。當(dāng)載車板地導(dǎo)輪與地下軌道相吻合時(shí),升降系統(tǒng)停止運(yùn)作,此時(shí)車庫頂蓋(附帶與兩側(cè)升降臺(tái)上)蓋住庫頂且?guī)祉斉c地面相平。隨后通過電磁閥傳感橫移系統(tǒng),載車板上得電機(jī)通過帶傳動(dòng)系統(tǒng)帶動(dòng)導(dǎo)輪沿著導(dǎo)軌橫向移動(dòng),而導(dǎo)輪與載車板是一體的,應(yīng)此載車板載著車輛和導(dǎo)輪同步向左或向右移入庫中兩側(cè)中地一個(gè)庫中,通過傳感系統(tǒng)找正位置,橫移停止運(yùn)作。車輛入庫結(jié)束??偣灿脮r(shí)大概一分鐘。
車輛出庫:操作控制系統(tǒng),橫移機(jī)構(gòu)帶動(dòng)對(duì)應(yīng)地載車板及上面地車輛橫向從小車庫移出,沿軌道到達(dá)升降臺(tái)指正位置,升降系統(tǒng)運(yùn)作,升降臺(tái)載著載車板和車輛向上移動(dòng),同時(shí)車庫蓋打開。當(dāng)升降臺(tái)上面與地面相平時(shí),上升停止。司機(jī)從庫口地左右兩側(cè)進(jìn)到車內(nèi),開走。隨后操作控制系統(tǒng),車輛入庫,入庫過程同上。
在不使用車庫地情況下,車庫頂蓋蓋住庫頂,從上面看去與地面相平,并且與附近路面和諧一致,既可以走人也可以通車輛。另外升降系統(tǒng)采用鋼絲繩傳動(dòng),由鏈起升降平衡的作用。
目 錄 字
第1章 緒論..1
第2章 車庫的總體設(shè)計(jì)方案 2
第3章 車庫的零件選擇和結(jié)構(gòu)設(shè)計(jì).3
3.1載車板的結(jié)構(gòu)和尺寸設(shè)計(jì) 3
3.2升降系統(tǒng)各零部件的結(jié)構(gòu)設(shè)計(jì)和尺寸確定 4
3.2.1 升降臺(tái)結(jié)構(gòu)地初步設(shè)計(jì) 4
3.2.2 鋼絲繩地設(shè)計(jì)計(jì)算 5
3.2.3 鋼絲繩夾地選擇 8
3.2.4 滑輪及其組件地設(shè)計(jì)計(jì)算 8
3.2.5 卷筒地設(shè)計(jì)計(jì)算和尺寸確定 13
3.2.6 升降鏈及鏈輪地選擇 18
3.2.7 升降用電動(dòng)機(jī)及變速器地設(shè)計(jì)計(jì)算及型號(hào)選擇 20
3.2.8 升降電動(dòng)傳動(dòng)鏈及連輪地連輪地設(shè)計(jì)計(jì)算 21
3.3橫移機(jī)構(gòu)結(jié)構(gòu)的設(shè)計(jì)和零件的設(shè)計(jì) 24
3.3.1軌道和導(dǎo)輪地設(shè)計(jì)計(jì)算 24
3.3.2橫移電動(dòng)機(jī)地設(shè)計(jì)計(jì)算及型號(hào)選擇 27
3.3.3帶及帶輪地選擇 29
3.3.4聯(lián)軸器地選擇 32
3.4 庫鋼架結(jié)構(gòu)地設(shè)計(jì) 33
3.5 鋼材地選用 34
第4章 車庫電控系統(tǒng) .38
4.1 控制系統(tǒng)組成 38
4.2 控制系統(tǒng)地運(yùn)行方式 39
4.3控制系統(tǒng)地故障檢測 39
第5章 車庫安全系統(tǒng)的設(shè)計(jì)40
5.1 安全系統(tǒng) 40
5.2 照明 41
5.3 通風(fēng) 41
5.4 排水 41
5.5 消防 42
總 結(jié) 43
參考文獻(xiàn) 44
附錄1 外文原文 45
附錄2 外文譯文 55
致 謝 61
摘 要:我國食品市場競爭激烈。眾多企業(yè)的失敗率較高,企業(yè)平均壽命只有3—5年,這是由于我國食品行業(yè)的大多數(shù)產(chǎn)品的利潤很薄,需要靠降低生產(chǎn)成本和實(shí)現(xiàn)市場規(guī)模效益達(dá)到企業(yè)預(yù)期的利潤目標(biāo),而在生產(chǎn)成本的構(gòu)成中,不可變成本應(yīng)該成為企業(yè)經(jīng)營管理者高度重視的一個(gè)方面,其中固定資產(chǎn)的投資所占的比重通常會(huì)成為生產(chǎn)成本居高不下的重要因素。從企業(yè)經(jīng)營戰(zhàn)略的角度出發(fā),如何在可行的范圍內(nèi),盡可能降低固定資產(chǎn)的投資,是食品企業(yè)需要優(yōu)先考慮的問題。而這一點(diǎn),又與具體食品企業(yè)的產(chǎn)品結(jié)構(gòu)密切相關(guān),如果現(xiàn)有的產(chǎn)品結(jié)構(gòu)不能使企業(yè)獲得較理想的銷售額和利潤回報(bào),則盲目擴(kuò)大投資規(guī)模將使企業(yè)背上沉重的成本負(fù)擔(dān)。所以,企業(yè)在項(xiàng)目投資的決策上,必須要結(jié)合自身現(xiàn)有產(chǎn)品結(jié)構(gòu),需要對(duì)產(chǎn)品市場能力和盈利能力做深入的分析,在此基礎(chǔ)上,決定投資的規(guī)模,使之與產(chǎn)品結(jié)構(gòu)相匹配,保持合理投資規(guī)模、優(yōu)化投資結(jié)構(gòu)。通過對(duì)大量食品企業(yè)的調(diào)查,本人認(rèn)為上述問題在食品企業(yè)均或多或少有所反映。因此本論文通過參考大量文獻(xiàn)和實(shí)際案例,重點(diǎn)研究產(chǎn)品結(jié)構(gòu)對(duì)于小型食品企業(yè)投資規(guī)模的制約和影響。為小型食品企業(yè)合理投資和積極改善產(chǎn)品結(jié)構(gòu),從而在投資規(guī)模與產(chǎn)品結(jié)構(gòu)相適應(yīng)方面提供有意義的思路。
關(guān)鍵詞:固定資產(chǎn);投資規(guī)模;產(chǎn)品結(jié)構(gòu)
Concerning the small-scale enterprise product structure on the influence of the benefit of investment
Abstract: China food market competition is intense. Many enterprise of failure is higher, enterprise average life expectancy is only 3-5 years, this is because most of the products in the food industry profits were thin, need to rely on to reduce the production cost and realized market scale benefit achieve enterprise expected profit target, and the composing of the production cost, do not become this should become highly enterprise managers one aspect of fixed asset investment, including the proportion that usually become the important factor of production cost is high. From the perspective of enterprise management strategy, how in feasible range, reduce the fixed asset investment, is food enterprise need priority. And this, and with specific food enterprise product structure closely related, if the existing product structure cannot make enterprise with satisfactory returns of sales and profits, the blind to expand investment scale will make enterprise back the cost burden of heavy. Therefore, enterprises in the project investment decision making, must according to its own existing product structure, need to product market ability and profitability do thorough analysis, based on this, the size of the investment decisions, which match with product structure, keep the rational investment scale, optimize the investment structure. Through the investigation of large quantities of food enterprise, I think that the above problems in food enterprises were more or less reflected. Therefore, this paper, by a large number of documents and actual cases reference, focus on product structure for small food enterprise investment restriction and influence. For small food enterprise reasonable investment and actively improve product structure, thus in the investment scale and product structure provide meaningful to adapt the ideas.
Key words: Fixed assets;investment scale; product structure
目 錄 8000字
摘 要 1
關(guān)鍵詞 1
一 產(chǎn)品結(jié)構(gòu)與投資效益的定義 2
二 產(chǎn)品的成本 3
(一) 產(chǎn)品的變動(dòng)成本 3
(二) 產(chǎn)品的固定成本 4
三 影響投資規(guī)模的主要因素 4
(一)市場對(duì)產(chǎn)品的需求程度 4
(二)產(chǎn)品的市場生命周期 5
1引入期 5
2成長期 5
3成熟期 5
4衰亡期 5
四 企業(yè)產(chǎn)品組合 6
五 投資規(guī)模的大小 8
六 產(chǎn)品組合的選擇 8
七 結(jié)論 8
參考文獻(xiàn) 8
致 謝 10
摘 要
績效考核是企業(yè)人力資源管理的重要環(huán)節(jié)和核心內(nèi)容,而如何客觀、公正、準(zhǔn)確的對(duì)員工的績效做出評(píng)價(jià),是目前人力資源績效管理中的一個(gè)重要問題。通過研究并設(shè)計(jì)適合這些企業(yè)的績效考核體系和模式,從而推動(dòng)企業(yè)人力資源管理水平,進(jìn)而推動(dòng)企業(yè)整體管理水平和提升企業(yè)的核心競爭能力,這對(duì)于現(xiàn)代企業(yè)具有重要的現(xiàn)實(shí)意義。
論文從分析績效管理系統(tǒng)開始,引申到績效管理中的一個(gè)核心環(huán)節(jié)——績效考核。在綜述了國內(nèi)外績效考核的研究發(fā)展現(xiàn)狀和分析了相關(guān)理論的基礎(chǔ)上,闡述了績效考核的內(nèi)涵與理論依據(jù),論文總結(jié)了目前常用的績效考核標(biāo)準(zhǔn),以及常見的績效管理模式,分析了各種不同管理模式的特點(diǎn)和利弊。其次,木文討論了新勞動(dòng)合同法對(duì)企業(yè)人力資源績效管理的影響,以及企業(yè)面對(duì)新勞動(dòng)合同法人力資源績效管理方法的變動(dòng)與實(shí)施。
關(guān)鍵詞:績效管理,新勞動(dòng)合同法,績效考核
ABSTRACT
The performance inspection is an important link and core content of Human Resource Management. How to evaluate the performance of staff objectivity, rightly and faithfully, is an important problem for the performance management of human resources. Researching and designing of the performance inspection system and mode for these enterprises, thus it can promote the enterprise human resources management level, promote the overall management level of enterprises and enhance the core competitiveness of enterprises. It is an important practical significance of the modern enterprises.
Papers began of the analysis of performance management systems, and extended to a core part of performance management - performance appraisal. At speaking comprehensively at home and abroad in the research and the development and analysis of the performance inspection, tell the content and theoretical of performance inspection, the paper summed up the performance inspection standards commonly and common mode of performance management, analysis various of characteristics and advantages and disadvantages of management models. Secondly, this paper discuss of a new labor contract law on corporate human resources performance management, and corporate face the human resources performance management changes and implementation of the new labor contract law.
Key words: Performance Management, the new labor contract law, the performance inspection.
研究內(nèi)容
本文主要討論績效管理的理論與方法,著重介紹了績效考核的標(biāo)準(zhǔn),以及新勞動(dòng)合同法對(duì)中國企業(yè)績效管理的影響。在新勞動(dòng)合同法下,企業(yè)績效管理的新方法研究與應(yīng)用。通過這些研究促進(jìn)企業(yè)形成科學(xué)、規(guī)范、有效的績效管理體系。
本文主要在以下兩個(gè)方而進(jìn)行了研究:
1)本文首先介紹績效管理的基礎(chǔ)理論,再著重分析績效管理中的重點(diǎn)績效考核,闡述了績效管理同績效考核的關(guān)系。在績效考核理論的基礎(chǔ)上,詳細(xì)總結(jié)了績效考核表針的類型和特點(diǎn)并比較了各種不同管理方法的特點(diǎn),分析其利弊。分析了企業(yè)人力資源績效管理存在的問題。
2)本文重點(diǎn)介紹了新勞動(dòng)合同法對(duì)企業(yè)人力資源的影響,對(duì)績效管理的影響;以及企業(yè)面對(duì)新勞動(dòng)合同法人力資源績效管理方法的變動(dòng)與實(shí)施。
相信木文所做的土作對(duì)我國企業(yè)的人力資源土作者及廣大管理者有較好的參考價(jià)值。
系統(tǒng)的績效管理
管理的理念正在發(fā)生根本性的變革,促使管理從科學(xué)管理和人際關(guān)系管理向人性化管理轉(zhuǎn)化。在此基礎(chǔ)上,人力資源績效管理的理念也發(fā)生了相應(yīng)的變化。人力資源績效管理是由六個(gè)相互聯(lián)系、相互依存的部分組成的循環(huán)系統(tǒng)系統(tǒng)的績效管理理論認(rèn)為,人力資源績效管理是由六個(gè)相互聯(lián)系、相互依存的部分組成的循環(huán)系統(tǒng)。這六個(gè)部分分別是績效計(jì)劃、績效計(jì)劃的實(shí)施與管理、績效考核、績效診斷和反饋、績效考核結(jié)果的應(yīng)用和績效信息的收集與處理
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工程項(xiàng)目采購管理模式的應(yīng)用研究(包含選題審批表,任務(wù)書,開題報(bào)告,中期檢查報(bào)告,畢業(yè)論文字)
摘 要:材料的采購管理是項(xiàng)目采購管理的重要組成部分,是項(xiàng)目管理成功的關(guān)鍵。采購費(fèi)用往往占整個(gè)項(xiàng)目費(fèi)用的絕大部分,不合理的材料采購計(jì)劃,會(huì)降低項(xiàng)目的質(zhì)量。本文將結(jié)合現(xiàn)代采購管理理論,分析由項(xiàng)目部進(jìn)行分散與集中采購管理模式的優(yōu)勢,提出基于現(xiàn)代采購管理理論的施工項(xiàng)目混合采購管理模式,運(yùn)用材料供應(yīng)分析、存貯策略,從根本上大幅降低企業(yè)采購成本,整體上獲得較大的直接經(jīng)濟(jì)效益。
關(guān)鍵詞:建筑施工;材料采購;成本控制;管理模式
Project Procurement Management Application
Abstract: Material procurement management is an important part of the project procurement management, and it is the key to successful project management. Procurement costs are often accounted for most of the total project cost, unreasonable material procurement plan would reduce the quality of projects. This paper will be combined with modern procurement management theory, analyzeing the advantages of the Department conducted decentralization and centralization project procurement management, proposed the mixed procurement management mode of the construction project based on the modern procurement management theory. Analysis of the use of material supply, storage strategy, basically substantially reduce the cost of enterprise purchasing, a larger overall direct economic benefits.
Key words: Construction; Materials procurement ; Cost control; Purchasing management
工程項(xiàng)目常用的采購管理模式
工程項(xiàng)目采購管理模式是各種項(xiàng)目采購管理模式中相對(duì)復(fù)雜,但又相對(duì)規(guī)范和成熟的項(xiàng)目采購管理模式。由于項(xiàng)目建設(shè)無論是對(duì)政府還是對(duì)私營機(jī)構(gòu)來說一般投資額比較大,提高項(xiàng)目管理水平,可以創(chuàng)造巨大的經(jīng)濟(jì)效益,因而多年來各種組織、企業(yè)以及個(gè)人對(duì)項(xiàng)目采購管理的模式和方法進(jìn)行了不斷的研究、創(chuàng)新和完善。
淺析歐林雅營銷策略(字)
摘 要:隨著經(jīng)濟(jì)的發(fā)展,人們對(duì)生活水平的要求逐漸提高,社會(huì)競爭的壓力也越來越大,為了提高競爭力,本文通過對(duì)比分析法,SWOT分析法等等,闡述了歐林雅竹纖維公司的發(fā)展現(xiàn)狀和特點(diǎn)、營銷環(huán)境等,總結(jié)了適合歐林雅竹纖維公司營銷的最佳策略。
關(guān)鍵詞:竹纖維;營銷策略;營銷組合;策略實(shí)施;
Analyses orin jas marketing strategy
Abstract: With the development of economy, people life level requirement, social competition gradually improve increasing pressure, in order to enhance competitiveness, this paper through the contrast analysis, SWOT, etc, this paper expounds the development of Europe LinYaZhu fiber company present situation and characteristics, the marketing environment for Europe, it is concluded that the LinYaZhu fiber company marketing the optimal strategy.
Key words:Bamboo fiber;Marketing Strategy;Marketing Mix;implementation of strategies;
公司多元化戰(zhàn)略的財(cái)務(wù)戰(zhàn)略選擇研究(字)
摘 要:多元化是一種戰(zhàn)略選擇,在現(xiàn)今錯(cuò)綜復(fù)雜的經(jīng)濟(jì)形勢下,戰(zhàn)略決定著公司的命運(yùn)。公司之間的競爭歸根到底是戰(zhàn)略優(yōu)劣的競爭,尤其是財(cái)務(wù)戰(zhàn)略,因其作為公司戰(zhàn)略的核心部分,關(guān)系著公司的前途命運(yùn)。當(dāng)前,公司在高速發(fā)展的同時(shí)面臨著管理難度增加,競爭者增多,市場份額減少等諸多問題。所以,公司必須要根據(jù)形勢的變化來選擇適合其發(fā)展的公司財(cái)務(wù)戰(zhàn)略,以使公司實(shí)現(xiàn)可持續(xù)發(fā)展。本文通過對(duì)企業(yè)多元化經(jīng)營和財(cái)務(wù)戰(zhàn)略的分析,從失敗的案例和成功的案例分析原因,總結(jié)多元化企業(yè)財(cái)務(wù)戰(zhàn)略的存在的問題和財(cái)務(wù)戰(zhàn)略的精髓,最后選擇正確的的財(cái)務(wù)戰(zhàn)略定位。
關(guān)鍵詞:多元化戰(zhàn)略;財(cái)務(wù)戰(zhàn)略;財(cái)務(wù)特征;財(cái)務(wù)戰(zhàn)略定位
Study on the Financial Strategy Operating on the Based of Enterprises Diversification
Abstract: Diversification is a strategic choice, in todays complex economic situation, the fate of the companys strategic decision. The competition between the company destiny1 figure of competition is the strategic, especially financial strategy, because it’s as the core part of corporate strategy, the companys future and destiny relationship. At present, the company in fast-growth also faces increased the difficulty of management, market share, competitors increased decreases etc many problems. So, the company must according to the situation changes to choose suitable for its development company financial strategy to enable the company to realize the sustainable development. This article through to enterprises diversified management and financial strategy from failure analysis of the cases, and successful cases of two aspects, summarizes the multiplication enterprise compared the financial strategy the existing problems and the essence of financial strategy, finally choosing the right financial strategic positioning.
Key words: Diversification Strategies,F(xiàn)inancial strategy, Financial characteristics,F(xiàn)inancial strategic orientation
太平人壽某分公司營銷策略研究(字)
摘 要:本文從營銷管理的角度出發(fā),在分析了目前公司所處的外部環(huán)境和內(nèi)部環(huán)境,確定了太平人壽郴州分公司的發(fā)展策略和發(fā)展目標(biāo)。根據(jù)本地區(qū)消費(fèi)者的特點(diǎn)進(jìn)行了市場細(xì)分,在分析公司自身情況和各個(gè)細(xì)分市場的市場潛力后,選擇了目標(biāo)市場,并對(duì)公司形象和產(chǎn)品進(jìn)行了定位。在此基礎(chǔ)上,提出了完整的市場營銷組合策略,從目標(biāo)市場、險(xiǎn)種、價(jià)格、營銷渠道和促銷五個(gè)方面提出了具體的實(shí)施意見和建議。希望通過這次研究,能為太平人壽郴州分公司營銷提供幫助。
關(guān)鍵詞:人壽保險(xiǎn) 營銷 策略
Peace Life Chen Zhou Branch Marketing Strategy Research
Abstract :This paper, from marketing management point of view, in the analysis of the current company locates the internal environment and external environment of the peace life, determines the development strategy of Chen Zhou branch and development goals. According to the characteristics of the region on the consumer market segment, by analyzing the company itself and the market potential of each segment market, select the target market, and the companys image and product positioning. Based on this, puts forward the complete market marketing mix strategy, from target market, coverage, price, marketing channels and promotion puts forward five specific implementation opinions and Suggestions. Hope that through this research for peace life Chen Zhou branch, marketing to offer help.
Keywords: life insurance marketing strategy
[摘要]
隨著的快速發(fā)展,的誠信危機(jī)也開始為人們所關(guān)注。本文介紹了我國電子商務(wù)誠信體系的現(xiàn)狀和存在的問題,并相應(yīng)提出了加強(qiáng)誠信體系建設(shè)的一些建議。
[關(guān)鍵詞]
電子商務(wù) 誠信體系 網(wǎng)絡(luò)企業(yè)
[Summary]
along with electronic commerce of fast development, the trustworthiness crisis of electronic commerce also the beginning is pay attention to by people.This text introduction the our country electronic commerce trustworthiness the problem of present condition and existence of the system, and corresponded to put forward to strengthen trustworthiness system construction of some suggestion.
[Keyword]
the system network of the electronic commerce trustworthiness business enterprise
[摘要] 1
[Summary] 1
[Keyword] 1
背景 3
第一、我國電子商務(wù)中信用體系的現(xiàn)狀 3
1.1電子商務(wù)信用體系的概念 4
1.2電子商務(wù)信用體系的特點(diǎn) 5
1.1.1、全球性特點(diǎn) 5
1.1.2、網(wǎng)絡(luò)技術(shù)特點(diǎn) 6
1.3電子工業(yè)子商務(wù)信用體系的內(nèi)容 7
第二、突破電子商務(wù)瓶頸,加強(qiáng)誠信體系建設(shè) 8
2.1.企業(yè)必須先行 8
2.2.加強(qiáng)消費(fèi)者安全與誠信意識(shí) 9
2.3.營造誠信環(huán)境 9
第三、我過電子商務(wù)體信用體系模式建設(shè)模式 10
3.1信用體系大象無形 11
3.2四種信用模式的利與弊 12
3.3信用體系是法律的輔助環(huán)節(jié) 13
3.4電子商務(wù)是信用體系在中國發(fā)展最快的領(lǐng)域 14
第四、結(jié)束語 15
[參考文獻(xiàn)] 17
9000字
摘 要
此次設(shè)計(jì)是對(duì)撥叉零件的加工工藝和夾具設(shè)計(jì),其零件為鍛件,具有體積小,零件復(fù)雜的特點(diǎn),由于面比孔易加工,在制定工藝規(guī)程時(shí),就先加工面,再以面為基準(zhǔn)來加工其它,其中各工序夾具都采用專用夾具,特別的對(duì)于加工大頭孔、槽和鉆小頭孔斜面小孔的工序中,選一面兩銷的定位方式,并以操作簡單的手動(dòng)夾緊方式夾緊,其機(jī)構(gòu)設(shè)計(jì)簡單,方便且能滿足要求。
關(guān)鍵詞 撥叉,加工工藝,專用夾具,設(shè)計(jì)
2 撥叉的分析
2.1撥叉的工藝分析
撥叉是一個(gè)很重要的零件,因?yàn)槠淞慵叽绫容^小,結(jié)構(gòu)形狀較復(fù)雜,但其加工孔和底面的精度要求較高,此外還有小頭孔端要求加工,對(duì)精度要求也很高。撥叉的底面、大頭孔上平面和小頭孔粗糙度要求都是 ,所以都要求精加工。其小頭孔與底平面有垂直度的公差要求,撥叉底面與大頭孔上平面有平行度公差要求,所要加工的槽,在其槽邊有平行度公差和對(duì)稱度公差要求等。因?yàn)槠涑叽缇?、幾何形狀精度和相互位置精度,以及各表面的表面質(zhì)量均影響機(jī)器或部件的裝配質(zhì)量,進(jìn)而影響其性能與工作壽命,因此它們的加工是非常關(guān)鍵和重要的。
摘 要 I
ABSTRACT Ⅱ
1 緒 論 1
2 撥叉的分析 2
2.1撥叉的工藝分析 2
2.2撥叉的工藝要求 2
3工藝規(guī)程設(shè)計(jì) 5
3.1 加工工藝過程 5
3.2確定各表面加工方案 5
3.2.1影響加工方法的因素 5
3.2.2加工方案的選擇 6
3.3 確定定位基準(zhǔn) 6
3.2.1粗基準(zhǔn)的選擇 6
3.2.1精基準(zhǔn)選擇的原則 7
3.4工藝路線的擬訂 7
3.4.1工序的合理組合 8
3.4.2工序的集中與分散 8
3.4.3加工階段的劃分 9
3.4.4加工工藝路線方案的比較 10
3.5撥叉的偏差,加工余量,工序尺寸及毛坯尺寸的確定 12
3.5.1毛坯的結(jié)構(gòu)工藝要求 12
3.5.2撥叉的偏差計(jì)算 12
3.6確定切削用量及基本工時(shí)(機(jī)動(dòng)時(shí)間) 14
3.7時(shí)間定額計(jì)算及生產(chǎn)安排 22
4 鏜孔夾具設(shè)計(jì) 25
4.1 研究原始質(zhì)料 25
4.2 定位、夾緊方案的選擇 25
4.3切削力及夾緊力的計(jì)算 25
4.4 誤差分析與計(jì)算 27
4.5 零、部件的設(shè)計(jì)與選用 28
4.5.1定位銷選用 28
4.5.2夾緊裝置的選用 29
4.6 夾具設(shè)計(jì)及操作的簡要說明 29
5 銑槽夾具設(shè)計(jì) 30
5.1研究原始質(zhì)料 30
5.2定位基準(zhǔn)的選擇 30
5.3 切削力及夾緊分析計(jì)算 30
5.4 誤差分析與計(jì)算 32
5.5 零、部件的設(shè)計(jì)與選用 33
5.5.1定位銷選用 33
5.5.2夾緊裝置的選用 33
5.5.3 定向鍵與對(duì)刀裝置設(shè)計(jì) 33
5.6 夾具設(shè)計(jì)及操作的簡要說明 36
6 鉆孔夾具設(shè)計(jì) 37
6.1研究原始質(zhì)料 37
6.2定位基準(zhǔn)的選擇 37
6.3切削力及夾緊力的計(jì)算 37
6.4誤差分析與計(jì)算 38
6.5 零、部件的設(shè)計(jì)與選用 39
6.5.1定位銷選用 39
6.5.2夾緊裝置的選用 40
6.5.3 鉆套、襯套、鉆模板設(shè)計(jì)與選用 40
6.6夾具設(shè)計(jì)及操作的簡要說明 41
結(jié) 論 42
參考文獻(xiàn) 43
致 謝 44
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