泵體加工工藝及夾具設(shè)計(jì)【鏜φ48孔】【鉆φ12孔】
泵體加工工藝及夾具設(shè)計(jì)【鏜φ48孔】【鉆φ12孔】,鏜φ48孔,鉆φ12孔,加工,工藝,夾具,設(shè)計(jì),48,12,十二
本科畢業(yè)設(shè)計(jì)任務(wù)書(shū)
題 目：夾具體機(jī)械加工工藝規(guī)程
及夾具設(shè)計(jì)（年產(chǎn)量20 000件）
專(zhuān) 業(yè)： 機(jī)械設(shè)計(jì)制造及其自動(dòng)化
班 級(jí)： 設(shè)10
學(xué)生姓名：
學(xué) 號(hào)：
指導(dǎo)教師： 陳恒高
黑龍江八一農(nóng)墾大學(xué)工程學(xué)院
畢業(yè)設(shè)計(jì)任務(wù)書(shū)
一、畢業(yè)設(shè)計(jì)原始資料
1．夾具體零件圖1張（給予）；
2．年產(chǎn)量20 000件（給予）；
3．機(jī)械設(shè)計(jì)零件手冊(cè)、機(jī)械加工工藝手冊(cè)、機(jī)床夾具設(shè)計(jì)手冊(cè)、機(jī)床夾具設(shè)計(jì)圖冊(cè)。
二、畢業(yè)設(shè)計(jì)任務(wù)及要求
1．對(duì)零件進(jìn)行工藝分析，選擇毛坯的制造方法。
2．制訂零件的機(jī)械加工工藝規(guī)程，其中包括：過(guò)程和工藝裝備設(shè)計(jì)計(jì)算說(shuō)明、工藝卡片、
工序卡片和綜合卡片。
3．夾具體零件圖1張、毛坯圖1張。
4．設(shè)計(jì)2套夾具。
5．設(shè)計(jì)對(duì)應(yīng)夾具的主要零件2個(gè)。
三、畢業(yè)設(shè)計(jì)工作量
1．設(shè)計(jì)說(shuō)明書(shū)
畢業(yè)設(shè)計(jì)說(shuō)明書(shū)應(yīng)包括下列內(nèi)容：封面、畢業(yè)設(shè)計(jì)任務(wù)書(shū)、中文摘要、英文摘要、目錄、前言、正文、參考文獻(xiàn)、致謝、附錄、論文評(píng)定成績(jī)，并按順序排列。設(shè)計(jì)說(shuō)明書(shū)的字?jǐn)?shù)應(yīng)在20000字以上，采用A4紙打印。
2．查閱參考文獻(xiàn)
查閱文獻(xiàn)10篇以上，其中查閱與課題有關(guān)的外文文獻(xiàn)2篇以上，并將其中的1篇文獻(xiàn)的摘要的原文和譯文（不少于3000漢字）附在附錄中。
3．設(shè)計(jì)圖紙
畢業(yè)設(shè)計(jì)圖紙應(yīng)符合國(guó)家有關(guān)制圖標(biāo)準(zhǔn)，正確體現(xiàn)設(shè)計(jì)意圖，圖面整潔，布置勻稱(chēng)，尺寸標(biāo)注齊全，字體端正，線型規(guī)范。圖紙全部由計(jì)算機(jī)繪制。
序號(hào)
圖紙內(nèi)容
規(guī)格
比例
1
工藝裝備結(jié)構(gòu)設(shè)計(jì)（2張）
0-1號(hào)圖
1:1
2
夾具主要零件圖（2張）
1—3
1:1
3
零件圖和毛坯圖各1張
1—3
1:1
4．其它工作量：
（1）機(jī)械加工工序卡片1套；
（2）機(jī)械加工工藝過(guò)程卡片1套。
四、畢業(yè)設(shè)計(jì)進(jìn)度安排
序號(hào)
起止日期
設(shè)計(jì)內(nèi)容
1
2月 28日～3月14日
撰寫(xiě)開(kāi)題報(bào)告，開(kāi)題答辯
2
3月15日～ 3月25日
收集查閱相關(guān)資料,根據(jù)所查閱的資料,結(jié)合自己所設(shè)計(jì)的內(nèi)容進(jìn)行工藝規(guī)程的設(shè)計(jì),確定工藝路線。
3
3月26日～4月10日
對(duì)工藝路線進(jìn)行分析并最終確定，計(jì)算切削余量，確定毛坯尺寸；計(jì)算切削用量和基本工時(shí)。
4
4月11日～5月10日
進(jìn)行工藝裝備設(shè)計(jì)與計(jì)算。
5
5月 11 日～5月23日
編寫(xiě)說(shuō)明書(shū)，校正設(shè)計(jì)過(guò)程中的錯(cuò)誤，輸出圖紙，準(zhǔn)備答辯
6
5月24日～ 5月30日
畢業(yè)設(shè)計(jì)答辯
5月31日～ 6月6日
畢業(yè)設(shè)計(jì)整改
五、參考資料
1．機(jī)械制造工藝學(xué)教材、機(jī)床夾具設(shè)計(jì)教材、互換性與測(cè)量技術(shù)教材。
2．機(jī)械零件設(shè)計(jì)手冊(cè)。
3．機(jī)床夾具設(shè)計(jì)手冊(cè)。
4．機(jī)床夾具設(shè)計(jì)圖冊(cè)。
六、審批意見(jiàn)
1．教研室意見(jiàn)：
教研室主任簽名：
年 月 日
2．學(xué)院意見(jiàn)：
教學(xué)院長(zhǎng)簽名：
年 月 日
先進(jìn)制造工藝在機(jī)械制造中的應(yīng)用
北京航空工藝研究所 劉新亞
陸廣 譯
[摘要] 介紹了并行工程、敏捷制造及精良生產(chǎn)等先進(jìn)制造技術(shù)的特點(diǎn)及在組合機(jī)床研制中的應(yīng)用,提出了如何深化和推廣這一應(yīng)用的具體措施。
關(guān)鍵詞：組合機(jī)床、并行工程、敏捷制造、精良生產(chǎn)
在機(jī)床工業(yè)中,隨著社會(huì)對(duì)產(chǎn)品要求的不斷提高,隨著市場(chǎng)競(jìng)爭(zhēng)的不斷加劇,滿(mǎn)足用戶(hù)要求,包括提高產(chǎn)品質(zhì)量、縮短生產(chǎn)周期、降低成本、改進(jìn)售后服務(wù)已成為贏得市場(chǎng)的突破口。為了達(dá)到贏得市場(chǎng)這一目的,應(yīng)當(dāng)引入現(xiàn)代先進(jìn)制造技術(shù):并行工程、敏捷制造及精良生產(chǎn),以促進(jìn)組合機(jī)床的發(fā)展。
1 并行工程
并行工程又稱(chēng)為同步工程,是集成、并行地優(yōu)化設(shè)計(jì)產(chǎn)品及其各種相關(guān)過(guò)程(包括制造及支持)的系統(tǒng)方法,這種方法引導(dǎo)產(chǎn)品開(kāi)發(fā)人員一開(kāi)始就考慮到產(chǎn)品從概念設(shè)計(jì)到消亡的整個(gè)生命周期中的所有因素,包括質(zhì)量、成本、進(jìn)度計(jì)劃和用戶(hù)需求等。
并行工程最早是作為縮短產(chǎn)品開(kāi)發(fā)周期的一種手段而發(fā)展起來(lái)的。其特征是將產(chǎn)品的開(kāi)發(fā)、生產(chǎn)中涉及的各種工程行為分解成一系列子任務(wù),如市場(chǎng)分析、設(shè)計(jì)、工藝設(shè)計(jì)、生產(chǎn)計(jì)劃和器材外購(gòu)、加工、質(zhì)量保證、檢測(cè)及售后服務(wù)等。這些子任務(wù)盡可能并行同步統(tǒng)籌考慮,以達(dá)到改進(jìn)設(shè)計(jì)、縮短周期、提高質(zhì)量、降低成本、優(yōu)化設(shè)計(jì)的目的。它強(qiáng)調(diào)集成、協(xié)調(diào)和并行,即:(1)將管理、設(shè)計(jì)、生產(chǎn)、服務(wù)等所有與項(xiàng)目有關(guān)的人員及產(chǎn)品信息集成為一個(gè)整體,強(qiáng)調(diào)各相關(guān)部門(mén)總體目標(biāo)及利益的一致;(2)采取設(shè)置一個(gè)稱(chēng)職的項(xiàng)目負(fù)責(zé)人和有合理人才結(jié)構(gòu)的協(xié)同工作小組的管理模式,由工作組負(fù)責(zé)項(xiàng)目中各部分子任務(wù)的協(xié)調(diào)及推進(jìn);(3)并行處理各階段的工作。根據(jù)項(xiàng)目中不同任務(wù)之間關(guān)聯(lián)性的不同,各部分子任務(wù)的工作過(guò)程可以部分重疊或完全重疊。根據(jù)這些原則,制定一個(gè)合理、優(yōu)化的工作計(jì)劃,并在其中必要的位置設(shè)置考核點(diǎn),由項(xiàng)目工作組具體落實(shí),使各子任務(wù)并行、有序地向前推進(jìn),以保證整個(gè)項(xiàng)目的順利實(shí)施。
1·1 并行工程與傳統(tǒng)工作方式的比較
按傳統(tǒng)的工作方式,各階段的工作是連續(xù)串行的。在這種產(chǎn)品開(kāi)發(fā)方式中,各階段相互脫節(jié),互不關(guān)聯(lián),導(dǎo)致設(shè)計(jì)錯(cuò)誤增多,且難及時(shí)發(fā)現(xiàn),這樣造成設(shè)計(jì)返工多,使開(kāi)發(fā)周期拉長(zhǎng),成本增加。
采用并行工作方式后,將各項(xiàng)工作過(guò)程集成起來(lái)并行考慮,各項(xiàng)工作可重疊進(jìn)行。有問(wèn)題時(shí)可以及時(shí)協(xié)調(diào)更改,以免因遺留到后續(xù)階段而增加改正的難度及費(fèi)用。因此,采用并行工程可明顯縮短產(chǎn)品開(kāi)發(fā)周期,降低成本,很適合組合機(jī)床專(zhuān)業(yè)的發(fā)展。
1·2 應(yīng)用實(shí)例
將并行工程的方法應(yīng)用于產(chǎn)品開(kāi)發(fā)中,效果非常顯著。1997年3月,北京航空工藝研究所與某摩托車(chē)廠簽定了設(shè)計(jì)制造6臺(tái)曲柄加工機(jī)床的合同項(xiàng)目,要求年 底交貨,且機(jī)床的要求與以往有較大差別。在該項(xiàng)目中采用了并行工程的方法,平行、交叉作業(yè),大大縮短了設(shè)計(jì)、制造工期,圓滿(mǎn)地完成了任務(wù)。
組合機(jī)床并行開(kāi)發(fā)的具體做法是:
(1)設(shè)立一個(gè)由多專(zhuān)業(yè)人員組成的開(kāi)發(fā)研制工作組。由工作組具體實(shí)施項(xiàng)目的各部分工作，工作組成員分工協(xié)作,各負(fù)其責(zé),及時(shí)協(xié)調(diào),從而實(shí)現(xiàn)優(yōu)化的設(shè)計(jì)。如機(jī)床的一種夾具要求在夾緊過(guò)程中零件能夠浮動(dòng),如果單獨(dú)從機(jī)械結(jié)構(gòu)方面考慮,滿(mǎn)足這一要求比較困難,夾具的結(jié)構(gòu)也復(fù)雜。后來(lái)通過(guò)與電器控制及液壓設(shè)計(jì)人員協(xié)調(diào),提出了修正控制程序、改變夾緊動(dòng)作次序、調(diào)整液壓壓力的解決方案,滿(mǎn)足了夾緊的要求。
(2)在制定工藝方案、簽定合同階段,就初步確定了一些標(biāo)準(zhǔn)部件。
(3)多次多級(jí)方案評(píng)審。在確定機(jī)床總體工藝方案、關(guān)鍵部件總體設(shè)計(jì)過(guò)程中,由技術(shù)委員會(huì)多次對(duì)設(shè)計(jì)方案進(jìn)行評(píng)審,并且在投入生產(chǎn)前還要經(jīng)過(guò)用戶(hù)對(duì)設(shè)計(jì)方案會(huì)審。這樣,就達(dá)到從設(shè)計(jì)一開(kāi)始就考慮到工藝設(shè)計(jì)、工裝設(shè)計(jì)、加工制造、裝配調(diào)試等下游各階段可能出現(xiàn)的問(wèn)題,從而大大減少了設(shè)計(jì)額定更改次數(shù),滿(mǎn)足了用戶(hù)要求,使設(shè)計(jì)方案達(dá)到最佳。
(4)采用設(shè)計(jì)預(yù)發(fā)布的方法。在正式機(jī)床總體圖出圖以前,分階段公布已確定的各部件主要結(jié)構(gòu)及主要數(shù)據(jù),使工藝設(shè)計(jì)、工裝設(shè)計(jì)能提前進(jìn)行。在機(jī)床總體設(shè)計(jì)的同時(shí),確定出一些部件如夾具、刀具等的協(xié)調(diào)尺寸,并同時(shí)開(kāi)始設(shè)計(jì)夾具和刀具,另外,還同時(shí)確定滑臺(tái)、移動(dòng)工作臺(tái)等部件,這些部件盡可能選擇已有的標(biāo)準(zhǔn)部件,在總體設(shè)計(jì)未完成時(shí)就將其投產(chǎn)。在設(shè)計(jì)中總體與各部件如夾具、刀具之間及時(shí)協(xié)調(diào),有關(guān)聯(lián)的尺寸改動(dòng)時(shí)互相及時(shí)協(xié)調(diào),使其他相關(guān)圖紙的尺寸得到及時(shí)改正。
(5)部件設(shè)計(jì)中可以將加工周期長(zhǎng)的零件如夾具體等鑄件盡早定型,提前進(jìn)行工藝設(shè)計(jì),投入生產(chǎn)。
(6)各部件一完成設(shè)計(jì),就隨時(shí)進(jìn)入工藝設(shè)計(jì)及生產(chǎn)階段。所以各部件中的零件也是在車(chē)間并行加工的。
采用這一方式,工作組4人只用了4周的時(shí)間就在將部分通用部件如滑臺(tái)、移動(dòng)工作臺(tái)和動(dòng)力頭等投產(chǎn)的同時(shí),完成了機(jī)床的機(jī)械設(shè)計(jì)及外購(gòu)件訂貨。機(jī)床的生產(chǎn)過(guò)程中,各個(gè)部件在北京航空工藝研究所和幾個(gè)外協(xié)廠家同時(shí)進(jìn)行。在機(jī)床的安裝和調(diào)試時(shí),也是幾臺(tái)機(jī)床同時(shí)進(jìn)行,通過(guò)這些工作,為機(jī)床的按時(shí)交付爭(zhēng)取了寶貴的時(shí)間。
2 敏捷制造
敏捷制造是美國(guó)里海大學(xué)在“21世紀(jì)制造業(yè)戰(zhàn)略”的報(bào)告中提出的一種全新的制造模式。經(jīng)過(guò)發(fā)展,美國(guó)lacocca研究所將其定義為:“敏捷是指一個(gè)公司在連續(xù)的不可預(yù)測(cè)市場(chǎng)變化的競(jìng)爭(zhēng)環(huán)境中發(fā)展和繁榮起來(lái)的一種能力,即對(duì)迅速變化的全球市場(chǎng)的快速響應(yīng)能力,是公司用計(jì)算機(jī)網(wǎng)絡(luò)與全球生產(chǎn)系統(tǒng)、市場(chǎng)、競(jìng)爭(zhēng)者連接起來(lái),在高質(zhì)量、高性能、低成本、顧客設(shè)定產(chǎn)品配置等用戶(hù)需求驅(qū)動(dòng)的市場(chǎng)形勢(shì)下所表現(xiàn)出的一種能力”。其特征是把柔性生產(chǎn)技術(shù)、靈活的組織管理和掌握專(zhuān)業(yè)技能的人員集成為一個(gè)協(xié)調(diào)、互相關(guān)聯(lián)的系統(tǒng),同時(shí)為了實(shí)現(xiàn)統(tǒng)一的戰(zhàn)略目標(biāo),把同一行業(yè)的不同企業(yè)通過(guò)共同的基礎(chǔ)結(jié)構(gòu)連結(jié)起來(lái),將過(guò)去你死我活的競(jìng)爭(zhēng)變?yōu)橛押煤献鞯母?jìng)爭(zhēng),從而對(duì)瞬息萬(wàn)變的市場(chǎng)作出快捷的響應(yīng)。因此,這種技術(shù)很適合組合機(jī)床專(zhuān)業(yè)的發(fā)展。
(1)敏捷首先是推進(jìn)產(chǎn)品的模塊化,反映在組合機(jī)床中就是推行機(jī)床功能部件的標(biāo)準(zhǔn)化和系列化。在曲軸加工機(jī)床的開(kāi)發(fā)與設(shè)計(jì)中,能大大縮短設(shè)計(jì)周期,并行工程的應(yīng)用是一個(gè)因素,大量標(biāo)準(zhǔn)部件、通用部件的應(yīng)用也是一個(gè)關(guān)鍵因素。
(2)在敏捷制造中,必須體現(xiàn)人和組織都是最寶貴的財(cái)富。在大批量的生產(chǎn)中,人們總是把技術(shù)當(dāng)作解決制造和銷(xiāo)售問(wèn)題的關(guān)鍵,而在敏捷制造中,以最佳方式利用人則是解決問(wèn)題的關(guān)鍵,技術(shù)僅是方法或手段。因此,需要推行項(xiàng)目工作組的組織模式,提倡愛(ài)崗敬業(yè)精神,充分發(fā)揮員工的主觀能動(dòng)性。
3 精良生產(chǎn)
精良生產(chǎn)是90年代美國(guó)在總結(jié)日本豐田汽車(chē)公司生產(chǎn)管理方式的基礎(chǔ)上總結(jié)出來(lái)的生產(chǎn)方式。它強(qiáng)調(diào)通過(guò)改進(jìn)企業(yè)在生產(chǎn)中的包括管理等各項(xiàng)活動(dòng)的效率,并對(duì)各種活動(dòng)進(jìn)行成本核算,以達(dá)到以最快的市場(chǎng)響應(yīng)速度、最低的生產(chǎn)成本、最優(yōu)的產(chǎn)品設(shè)計(jì)來(lái)設(shè)計(jì)和制造市場(chǎng)所需要的產(chǎn)品。其特征是以用戶(hù)為上帝,以人為中心,以精簡(jiǎn)為手段,以零缺陷為目標(biāo)。
4 深化及推廣先進(jìn)制造技術(shù)的應(yīng)用
從以上分析可看出,先進(jìn)制造技術(shù)在北京航空工藝研究所的組合機(jī)床的研制中已得到了一些應(yīng)用,但仍需進(jìn)一步深化和推廣這一應(yīng)用。在以后的工作中,應(yīng)注意以下幾個(gè)方面:
(1)進(jìn)一步推行項(xiàng)目工作組的模式,實(shí)行責(zé)任到人,由該小組用并行工程的方式負(fù)責(zé)完成機(jī)床從技術(shù)方案到設(shè)計(jì)、制造、調(diào)試和交付的工作;同時(shí)加強(qiáng)員工的知識(shí)與技能培訓(xùn),隨時(shí)跟蹤國(guó)內(nèi)外組合機(jī)床行業(yè)的最新進(jìn)展。
(2)研究市場(chǎng)的變化,制定預(yù)研計(jì)劃;同時(shí)保持與用戶(hù)的密切聯(lián)系,對(duì)用戶(hù)定期回訪,為用戶(hù)提供優(yōu)質(zhì)的售后服務(wù),并了解設(shè)備運(yùn)行情況及用戶(hù)需求,以便改進(jìn)設(shè)計(jì)。
(3)以?xún)?yōu)質(zhì)的產(chǎn)品贏得用戶(hù)。在組合機(jī)床的開(kāi)發(fā)中,除了增強(qiáng)質(zhì)量意識(shí)外,新技術(shù)、新工藝的應(yīng)用也是占領(lǐng)市場(chǎng)的一個(gè)重要手段?，F(xiàn)在用戶(hù)普遍要求機(jī)床提高效率、增加柔性,并適應(yīng)小批量、多品種的加工。要提高組合機(jī)床的生產(chǎn)效率,在設(shè)計(jì)中應(yīng)從提高切削速度、采用先進(jìn)刀具、集中加工工序3個(gè)方面進(jìn)行考慮。
(4)重視開(kāi)發(fā)產(chǎn)品的可重構(gòu)性,實(shí)現(xiàn)機(jī)床結(jié)構(gòu)的模塊化。在設(shè)計(jì)中,可采用成組技術(shù),推進(jìn)組合機(jī)床通用功能模塊的開(kāi)發(fā)應(yīng)用,也可采用數(shù)控柔性坐標(biāo)單元的模式。
(5)推行敏捷制造技術(shù)的應(yīng)用,建立有效的虛擬聯(lián)盟的動(dòng)態(tài)合作形式。進(jìn)一步加強(qiáng)與外購(gòu)件生產(chǎn)廠及外協(xié)廠的合作。充分利用社會(huì)上已有的技術(shù)、信息及人員設(shè)備等資源,實(shí)行強(qiáng)—強(qiáng)聯(lián)合,優(yōu)勢(shì)互補(bǔ),利用虛擬公司的模式擴(kuò)大我們的生產(chǎn)能力。
(6)在組合機(jī)床的設(shè)計(jì)與生產(chǎn)中進(jìn)一步推廣計(jì)算機(jī)及信息、網(wǎng)絡(luò)技術(shù)的應(yīng)用。推進(jìn)CAD技術(shù)的應(yīng)用,實(shí)現(xiàn)無(wú)圖設(shè)計(jì),進(jìn)而建立CAD/CAM/CAPP集成工程設(shè)計(jì)的環(huán)境。
(7)進(jìn)一步加強(qiáng)技術(shù)合作與交流,提高我所組合機(jī)床在行業(yè)內(nèi)的地位及知名度,同時(shí)積極發(fā)掘新的市場(chǎng)及用戶(hù)。應(yīng)努力開(kāi)拓國(guó)際市場(chǎng),如向日本豐田汽車(chē)制造公司出口用于汽車(chē)發(fā)動(dòng)機(jī)機(jī)體的深孔加工的立式數(shù)控雙軸深孔鉆床,為我所的組合機(jī)床進(jìn)入國(guó)際市場(chǎng)開(kāi)了一個(gè)好頭。
Application of Advanced Manufacturing Technology in Modular Machine Tool
Beijing Institute of Aviation Technology Liu xin Ya
[Abstract] introduced a concurrent engineering, agile manufacturing and sophisticated production, and other advanced manufacturing technology and the characteristics of the development of machine tools in the portfolio of applications, how to deepen and extend the application of specific measures.
Keywords：Modular machine tool、Concurrent Engineering、Agile Manufacturing、Sophisticated production
In the machine tool industry, with the social demands of the continuous improvement of products, along with the growing competition in the market to meet user requirements, including the improvement of product quality, shorten production cycles, reduce costs, improve service and win market has become a breakthrough. In order to achieve this goal and win market, it should be the introduction of modern and advanced manufacturing technology: concurrent engineering, agile manufacturing and sophisticated production, in order to promote the development of combination machine.
1 Concurrent Engineering
Concurrent Engineering is also known as concurrent engineering, integrated, parallel to optimize product design and its related processes (including manufacturing and support) system approach, which guide the product development staff began to consider a product from concept to design to the demise of throughout the life cycle of all the factors, including quality, cost, programming and user needs.
Concurrent Engineering is the first to shorten product development cycles as a means to develop. Products will be characterized by the development, production engineering involved in the acts broken down into a series of tasks, such as market analysis, design, process design, production plans and equipment purchases, processing, quality assurance, testing and after sales service. These sub-tasks as far as possible and consider synchronous parallel to achieve improved design to shorten the cycle and improve quality, reduce costs, optimize the design purpose. It stressed that integrated, coordinated and parallel, namely: (1) management, design, production, and service of all project-related personnel and product information integration as a whole, and stressed that all relevant departments and the interests of the overall goal line (2) to the establishment of a competent and reasonable charge of the project personnel structure of the working group coordinated management model, by the Working Group in the ministries responsible for project elements, and the promotion of the coordination of tasks, (3) parallel processing stages of the work. According to the project in the different tasks of the linkages between the different ministries mandate of the elements of the work process can be completely overlap or duplication. In accordance with these principles, formulate a reasonable, and optimize the work plan, and the location in which the necessary settings assessment, the Working Group by the project implementation so that all sub-tasks in parallel, to move forward in an orderly manner, so as to ensure the smooth implementation of the whole project .
1.1 concurrent engineering work with the traditional way of comparison
According to the traditional methods of work, the work of the various stages in a row serial. In such a product development approach, divorced from each other at various stages, are not related, resulting in increased design error, and difficult to discover such a design rework, to lengthen the development cycle, adding to the costs.
Parallel working methods used, the process will be integrated with parallel consideration, the work can be carried out duplication. Problems can be promptly coordinate the changes so that the follow-up stage left to increase the difficulty of correction
And costs. Thus, the application of concurrent engineering can significantly shorten the product development cycle, reduce costs, it is suitable for the development of professional portfolio machine.
1.2 Applications
Concurrent engineering methods will be applied to product development, the effect was very significant. March 1997, Beijing Institute of Aviation Technology with a motorcycle design and manufacturing plants to sign the 6-crank machine project contract for delivery end of the year, and the requirements of machine tools in the past quite different. In the project using a concurrent engineering approach, in parallel, cross-operation , greatly reducing the design, manufacture period, the successful completion of the tasks.
Parallel development of the combination of machine specific methods are:
(1) the establishment of a multi-composed of professionals to develop working groups. By the Working Group of the specific part of the implementation of the project, members of the Working Group in collaboration division of duties, timely and coordinated in order to achieve optimization of the design. Such as a machine tool demand in the clamping fixture parts to the process of floating, if separate consideration from the mechanical structure to meet this requirement more difficult, complex structure of the fixture. Later, with the hydraulic design of electrical control and coordinate, control procedures proposed amendments to change the order clamping action, adjusting the hydraulic pressure of solutions to meet the requirements of the clamping.
(2) in the formulation of programmes, the signing of the contract stage, on the preliminary identified a number of standard components.
(3) Multiple Multi-accreditation programme. Machine Tool Technology in determining the overall programme, key components in the overall design process, many times by the technical committee to review the design plan, and put into production before the user in the design plan joint trials. Thus, from the design to take into account the beginning of a process design, tooling design, manufacturing, assembly and other downstream various stages of debugging problems that may arise, thus greatly reducing the number of design changes Rated meet user requirements, to achieve design best.
(4) a design pre-release method. Machine overall plans in a formal drawing ago, has been released in stages set by the main structure and the major components of data, process design, tooling design can be carried out ahead of schedule. In the design of the machine tool to determine some components such as fixtures, tools such as the coordination of size, and at the same time began to design and tool fixture, and, also identified slider, mobile workstations and other components, these components have the choice as far as possible Standard components, in the design of its operation will be completed. And the overall design of the various components such as fixtures, and timely coordination between the tool, linked to changes in the size of each other timely coordination so that the size of other relevant drawings are promptly corrected.
(5) components in the design of the processing cycle can be long specific parts such as folders, such as casting stereotypes as soon as possible to advancing the process design, production.
(6) completion of the various components of a design, process design and ready to enter the production stage. Therefore, the various components of the parts is in the workshop, parallel processing.
Adopt this approach, the Working Group 4 were used only four weeks time on the part of generic components such as the slider, mobile platforms and power first went into operation at the same time, the completion of the mechanical design of the machine and outsourcing of orders. Machine tool production process, the various components in the Beijing Institute of Aviation Technology Association, and several manufacturers at the same time. In the machine, installation and debugging, but also several machine at the same time, through these work, and machine tools for the timely delivery of valuable time.
2 Agile Manufacturing
Agile manufacturing in the United States of the Caspian Sea, "the 21st century manufacturing strategy" in the report of a new manufacturing paradigm. After development, the United States lacocca Institute will be defined as: "a company that is agile in the market for the unpredictable changes in the competitive environment in the development and prosperity of a capability, that is rapidly changing global market a rapid response capability, with the company computer network and the global production system, the market, competitors to link up in the high-quality, high-performance, low-cost, customer product configuration settings, such as user demand-driven market situation demonstrated a capability. " Characterized by the flexible production technology, flexible organization management and professional skills of the staff have integrated into a coordinated, interconnected systems, in order to achieve the strategic goal of reunification, the same industry in different enterprises through joint infrastructure links, past life-and-death competition will become friendly and cooperative competition, thereby changing market faster response. Therefore, this technology is suitable for the development of professional portfolio machine.
(1) promote the Agile first modular products, reflected in the composition of the machine is in the machine tool components and the standardization of serialization. Crankshaft Machine Tool in the development and design, can greatly shorten the design cycle, the application of concurrent engineering is a factor, large number of standard components, the application of common components is a key element.
(2) In the Agile Manufacturing, must reflect the people and organizations is the most valuable asset. In the production of large quantities, people are always technical solution as manufacture and sale of the crux of the problem, and in Agile Manufacturing, the best use of people is the key to solve the problem, technology is only a method or means. Therefore, the need for the Project Working Group organizational model advocated hard working, give full play to their initiative.
3 Sophisticated production
Sophisticated production is the United States in the 1990s, Japan's Toyota Motor Corporation summed up production management methods on the basis of summing up by the production. It stressed that by improving the production of enterprises in the management of the activities, including the efficiency of various activities and cost accounting, to achieve the fastest speed of response to the market, the lowest cost of production, the optimal product design to design and Manufacturing of products needed by the market. Its features are user-God, a people-centred, as a means to streamline, to zero defect goal.
4 deepen and promote the application of advanced manufacturing technology
Can be seen from the above analysis, and advanced manufacturing technology in the Beijing Institute of Aviation Technology Portfolio machine has been developed in a number of applications, but still need to further deepen and extend the application. In later work, Should pay attention to the following aspects:
(1) Working Group on the further implementation of the project model, a responsibility to the people, by the use of concurrent engineering group responsible for the completion of the way from the machine tool technology programme to design, manufacture, testing and delivery of the work of the staff at the same time strengthen the knowledge and skills training, keep track machine tool industry at home and abroad combination of the latest developments.
(2) market changes and the development of pre-study plan at the same time maintain close ties with users, users who regularly visit provides its users with quality after-sales service, and equipment operation and understanding of user needs, in order to improve the design.
(3) high-quality products to win customers. Machine Tool in the development portfolio, in addition to enhancing the sense of quality, the new technology, the application of new technology in the market is also an important means. Now users generally require machine efficiency, flexibility, and adapt to small quantities and variety of processing. Portfolio Tool to enhance the efficiency of production and increase in the design should be cutting speed, the use of advanced tools, centralized processing consider three aspects.
(4) attention to the development of products can be reconstructed so as to achieve the structure of modular machine. In the design, the use of group technology, and promote common machine combination of the development and application of functional modules, can be flexible coordinates NC unit model.
(5) the application of agile manufacturing technology, the establishment of an effective Union dynamic virtual forms of cooperation. Further strengthen and outsourcing of production plants and factories, HS cooperation. Make full use of existing community technology, information equipment and personnel resources, strong - strong alliance, complementary advantages, the use of the virtual company model to expand our production capacity.
(6) In combination with the design of machine tools to further promote the production of computer and information network technology applications. Promote the application of CAD technology, the realization of a map designed to establish CAD / CAM / CAPP works Design environment.
(7) to further strengthen technical cooperation and exchanges and enhance my portfolio in the machine tool industry and the status of visibility, at the same time actively explore new markets and customers. Efforts should be made to explore the international market, such as the Toyota Motor Co., Japan's exports to the body of the car's engine of vertical CNC machining deep hole biaxial deep hole drilling machine, I have a combination of machine to enter the international market and made a good start.
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