完整版)模具_(dá)畢業(yè)設(shè)計(jì)外文翻譯_353433

1、冷沖模具使用壽命的影響及對(duì)策沖壓模具概述沖壓模具 - 在冷沖壓加工中， 將材料（金屬或非金屬） 加工成零件 （或 半成品）的一種特殊工藝裝備，稱為冷沖壓模具（俗稱冷沖模） 。沖壓 - 是在室溫下，利用安裝在壓力機(jī)上的模具對(duì)材料施加壓力，使其產(chǎn)生分離 或塑性變形，從而獲得所需零件的一種壓力加工方法。 沖壓模具的形式很多，一般可按以下幾個(gè)主要特征分類：1根據(jù)工藝性質(zhì)分類（ 1）沖裁模 沿封閉或敞開(kāi)的輪廓線使材料產(chǎn)生分離的模具。如落料 模、沖孔模、切斷模、切口模、切邊模、剖切模等。（ 2）彎曲模 使板料毛坯或其他坯料沿著直線（彎曲線）產(chǎn)生彎曲變 形，從而獲得一定角度和形狀的工件的模具。（ 3）拉深模

2、 是把板料毛坯制成開(kāi)口空心件，或使空心件進(jìn)一步改變 形狀和尺寸的模具。（ 4）成形模 是將毛坯或半成品工件按圖凸、凹模的形狀直接復(fù)制成 形，而材料本身僅產(chǎn)生局部塑性變形的模具。 如脹形模、縮口模、擴(kuò)口模、 起伏成形模、翻邊模、整形模等。2 根據(jù)工序組合程度分類（1）單工序模 在壓力機(jī)的一次行程中， 只完成一道沖壓工序的模具。（2）復(fù)合模 只有一個(gè)工位，在壓力機(jī)的一次行程中，在同一工位上 同時(shí)完成兩道或兩道以上沖壓工序的模具。（ 3）級(jí)進(jìn)模（也稱連續(xù)模） 在毛坯的送進(jìn)方向上，具有兩個(gè)或更多 的工位，在壓力機(jī)的一次行程中，在不同的工位上逐次完成兩道或兩道以 上沖壓工序的模具。沖冷沖模全稱為冷沖壓模

3、具。冷沖壓模具是一種應(yīng)用于模具行業(yè)冷沖壓模具及其配件所需高性能 結(jié)構(gòu)陶瓷材料的制備方法，高性能陶瓷模具及其配件材料由氧化鋯、氧化 釔粉中加鋁、鐠元素構(gòu)成，制備工藝是將氧化鋯溶液、氧化釔溶液、氧化 鐠溶液、氧化鋁溶液按一定比例混合配成母液，滴入碳酸氫銨，采用共沉 淀方法合成模具及其配件陶瓷材料所需的原材料， 反應(yīng)生成的沉淀經(jīng)濾水、 干燥，煅燒得到高性能陶瓷模具及其配件材料超微粉， 再經(jīng)過(guò)成型、 燒結(jié)、 精加工，便得到高性能陶瓷模具及其配件材料。本發(fā)明的優(yōu)點(diǎn)是本發(fā)明制 成的冷沖壓模具及其配件使用壽命長(zhǎng)，在沖壓過(guò)程中未出現(xiàn)模具及其配件 與沖壓件產(chǎn)生粘結(jié)現(xiàn)象，沖壓件表面光滑、無(wú)毛刺，完全可以替代傳統(tǒng)高

4、 速鋼、鎢鋼材料。冷沖模具主要零件 冷沖模具是沖壓加工的主要工藝裝備，沖壓制件就是靠上、下模具的相對(duì) 運(yùn)動(dòng)來(lái)完成的。加工時(shí)由于上、下模具之間不斷地分合，如果操作工人的 手指不斷進(jìn)入或停留在模具閉合區(qū)，便會(huì)對(duì)其人身安全帶來(lái)嚴(yán)重威脅。 （一）模具的主要零件、作用及安全要求 1工作零件凸凹模是直接使坯料成形的工作零件，因此，它是模具上的 關(guān)鍵零件。凸凹模不但精密而且復(fù)雜，它應(yīng)滿足如下要求：（1）應(yīng)有足夠的強(qiáng)度，不能在沖壓過(guò)程中斷裂或破壞（2）對(duì)其材料及熱處理應(yīng)有適當(dāng)要求，防止硬度太高而脆裂。 2定位零件定位零件是確定坯件安裝位置的零件，有定位銷(xiāo)（板） 、擋料 銷(xiāo)（板）、導(dǎo)正銷(xiāo)、導(dǎo)料板、定距側(cè)刀、側(cè)壓

5、器等。設(shè)計(jì)定位零件時(shí)應(yīng)考慮 操作方便，不應(yīng)有過(guò)定位，位置要便于觀察，最好采用前推定位、外廓定 位和導(dǎo)正銷(xiāo)定位等。3壓料、卸料及出料零件壓料零件有壓邊圈、壓料板等。壓邊圈可對(duì)拉延坯料加壓邊力，從而防止坯料在切向壓力的作用下拱 起而形成皺褶。壓料板的作用是防止坯料移動(dòng)和彈跳。頂出器、卸料板的 作用是便于出件和清理廢料。 它們由彈簧、 橡膠和設(shè)備上的氣墊推桿支撐， 可上下運(yùn)動(dòng)，頂出件設(shè)計(jì)時(shí)應(yīng)具有足夠的頂出力，運(yùn)動(dòng)要有限位。卸料板 應(yīng)盡量縮小閉合區(qū)域或在操作位置上銑出空手槽。暴露的卸料板的四周應(yīng) 設(shè)有防護(hù)板，防止手指伸入或異物進(jìn)入，外露表面棱角應(yīng)倒鈍。 4導(dǎo)向零件導(dǎo)柱和導(dǎo)套是應(yīng)用最廣泛的一種導(dǎo)向零件。

6、其作用是保證凸 凹模在沖壓工作時(shí)有精確的配合間隙。因此，導(dǎo)柱、導(dǎo)套的間隙應(yīng)小于沖 裁間隙。導(dǎo)柱設(shè)在下模座，要保證在沖程下死點(diǎn)時(shí)，導(dǎo)柱的上端面在上模 板頂面以上最少 5 至 10 毫米。導(dǎo)柱應(yīng)安排在遠(yuǎn)離模塊和壓料板的部位， 使操作者的手臂不用越過(guò)導(dǎo)柱送取料。 5支承及夾持零件它包括上下模板、模柄、凸凹模固定板、墊板、限位 器等。上下模板是冷沖模具的基礎(chǔ)零件，其他各種零件都分別安裝固定在上 面。模板的平面尺寸，尤其是前后方向應(yīng)與制件相適應(yīng)，過(guò)大或過(guò)小均不 利于操作。有些模具（落料、沖孔類模具）為了出件方便，需在模架下設(shè)墊板。 這時(shí)墊板最好與模板之間用螺釘連接在一起，兩墊板的厚度應(yīng)絕對(duì)相等。 墊板的

7、間距以能出件為準(zhǔn)，不要太大，以免模板斷裂。 6緊固零件它包括螺釘、螺母、彈簧、柱銷(xiāo)、墊圈等，一般都采用標(biāo)準(zhǔn) 件。冷沖模具的標(biāo)準(zhǔn)件用量較多，設(shè)計(jì)選用時(shí)應(yīng)保證緊固和彈性頂出的需 要，避免緊固件暴露在表面操作位置上，防止碰傷人手和妨礙操作。 冷沖模具的發(fā)展改革開(kāi)放以來(lái)，隨著國(guó)民經(jīng)濟(jì)的高速發(fā)展，市場(chǎng)對(duì)冷沖模具的需求量不斷增長(zhǎng)。近年來(lái)，冷沖模具工業(yè)一直以15%左右的增長(zhǎng)速度快速發(fā)展，冷沖模具工業(yè)企業(yè)的所有制成分也發(fā)生了巨大變化，除了國(guó)有專業(yè)模具廠 外，集體、合資、獨(dú)資和私營(yíng)也得到了快速發(fā)展。隨著與國(guó)際接軌的腳步不斷加快，市場(chǎng)競(jìng)爭(zhēng)的日益加劇，人們已經(jīng)越 來(lái)越認(rèn)識(shí)到產(chǎn)品質(zhì)量、成本和新產(chǎn)品的開(kāi)發(fā)能力的重要性。

8、而冷沖模具制 造是整個(gè)鏈條中最基礎(chǔ)的要素之一，冷沖模具制造技術(shù)現(xiàn)已成為衡量一個(gè) 國(guó)家制造業(yè)水平高低的重要標(biāo)志，并在很大程度上決定企業(yè)的生存空間。近年許多冷沖模具企業(yè)加大了用于技術(shù)進(jìn)步的投資力度，將技術(shù)進(jìn)步 視為企業(yè)發(fā)展的重要?jiǎng)恿?。一些?guó)內(nèi)模具企業(yè)已普及了二維CAD并陸續(xù)開(kāi)始使用 UG、ProEngineer 、I-DEAS、Euclid-IS 等國(guó)際通用軟件，個(gè)別 廠家還引進(jìn)了 Moldflow、C-Flow、DYNAFORMDptris 和 MAGMASC等TCAE 軟件，并成功應(yīng)用于沖壓模的設(shè)計(jì)中。以汽車(chē)覆蓋件模具為代表的大型沖壓模具的制造技術(shù)已取得很大進(jìn) 步，東風(fēng)汽車(chē)公司模具廠、一汽模具

9、中心等模具廠家已能生產(chǎn)部分轎車(chē)覆 蓋件模具。此外，許多研究機(jī)構(gòu)和大專院校開(kāi)展模具技術(shù)的研究和開(kāi)發(fā)。 經(jīng)過(guò)多年的努力，在模具 CADCAECAMI術(shù)方面取得了顯著進(jìn)步；在提高模 具質(zhì)量和縮短模具設(shè)計(jì)制造周期等方面做出了貢獻(xiàn)。雖然中國(guó)冷沖模具工業(yè)在過(guò)去十多年中取得了令人矚目的發(fā)展，但許 多方面與工業(yè)發(fā)達(dá)國(guó)家相比仍有較大的差距。例如，精密加工設(shè)備在冷沖 模具加工設(shè)備中的比重比較低；CADCAECA1M術(shù)的普及率不高；許多先進(jìn) 的模具技術(shù)應(yīng)用不夠廣泛等等，致使相當(dāng)一部分大型、精密、復(fù)雜和長(zhǎng)壽 命冷沖模具依賴進(jìn)口。隨著科學(xué)技術(shù)的不斷進(jìn)步 , 現(xiàn)代工業(yè)產(chǎn)品的生產(chǎn)日益復(fù)雜與多樣化 , 產(chǎn)品性能和質(zhì)量也在不斷

10、提高 , 因而對(duì)冷沖壓技術(shù)提出了更高的要求 . 為 了使冷沖壓技術(shù)能適應(yīng)各工業(yè)部門(mén)的需要 , 冷沖壓技術(shù)自身也在不斷革新和發(fā)展 . 冷沖壓技術(shù)的發(fā)展思路就是盡可能地完善和擴(kuò)充冷沖壓工藝的優(yōu) 點(diǎn),克服其缺點(diǎn) .在冷沖壓技術(shù)的發(fā)展過(guò)程中 ,應(yīng)注意以下幾方面：(1) 冷沖壓技術(shù)的發(fā)展過(guò)程中應(yīng)正確地確定工藝參數(shù)及冷沖模具工作部分 的形狀與尺寸 ,提高沖壓件的質(zhì)量、縮短新產(chǎn)品試制周期 , 應(yīng)在加強(qiáng)沖壓成 形理論研究的基礎(chǔ)上 , 使沖壓成形理論達(dá)到能對(duì)生產(chǎn)實(shí)際起指導(dǎo)作用, 逐步建立起一套密切結(jié)合生產(chǎn)實(shí)際的先進(jìn)的工藝分析計(jì)算方法. 國(guó)外已開(kāi)始采用彈塑性有限元法對(duì)汽車(chē)覆蓋零件的成形過(guò)程進(jìn)行應(yīng)力應(yīng)變分析和計(jì)算

11、機(jī)模擬 ,以預(yù)測(cè)某一工藝方案對(duì)零件成形的可能性和可能出現(xiàn)的問(wèn)題。(2) 加快產(chǎn)品更新?lián)Q代 , 克服模具設(shè)計(jì)周期長(zhǎng)的缺點(diǎn) . 應(yīng)大力開(kāi)展模具計(jì)算 機(jī)輔助設(shè)計(jì)和制造(CADCAM技術(shù)的研究.在我國(guó),目前要特別注意加強(qiáng)多 工位級(jí)進(jìn)模CADCA技術(shù)的研究。(3) 滿足大量生產(chǎn)需要以及減輕勞動(dòng)強(qiáng)度 . 應(yīng)加強(qiáng)冷沖壓生產(chǎn)的機(jī)械化和 自動(dòng)化研究 , 使一般中、小件能在高速壓力機(jī)上采用多工位級(jí)進(jìn)模生產(chǎn) , 達(dá) 到生產(chǎn)高度自動(dòng)化 , 進(jìn)一步提高沖壓的生產(chǎn)率。(4) 擴(kuò)大冷沖壓生產(chǎn)的運(yùn)用范圍 . 使冷沖壓既適合大量生產(chǎn) , 也適合小批量 生產(chǎn);既能生產(chǎn)一般精度的產(chǎn)品 ,也能生產(chǎn)精密零件 .應(yīng)注意開(kāi)發(fā)如精密沖 裁(

12、 特別是厚料精沖 ) 、高能成形、軟模成形、施壓和超塑性加工等新成形 工藝, 還要推廣簡(jiǎn)易模 (軟模和低熔點(diǎn)合金模 )、通用組合模、數(shù)控沖床等 設(shè)備的運(yùn)用。此外, 對(duì)沖壓板料性能的改進(jìn) , 模具新材料、模具新加工方法的開(kāi)發(fā)也應(yīng)進(jìn) 一步加強(qiáng)。冷沖模具使用壽命的影響及對(duì)策 冷沖模具的使用壽命是以沖制出的工件數(shù)量來(lái)計(jì)算的。影響冷沖模壽 命的因素很多。主要有模具結(jié)構(gòu)設(shè)計(jì)、制造模具所用凸模和凹模的材料、 模具的熱處理質(zhì)量與表面強(qiáng)化、 沖模零件的制造精度和冷沖壓材料的選取。除此之外，還有沖模的安裝、調(diào)整、使用以及維修等。 1模具設(shè)計(jì)對(duì)壽命的影響(1) 排樣設(shè)計(jì)的影響排樣方法與搭邊值對(duì)模具壽命的影響很大，過(guò)

13、小 的搭邊值，往往是造成模具急劇磨損和凸、凹模啃傷的重要原因。從節(jié)約 材料出發(fā)，搭邊值愈小愈好，但搭邊值小于一定數(shù)值后，對(duì)模具壽命和剪 切表面質(zhì)量不利。在沖裁中有可能被拉人模具問(wèn)隙中，使零件產(chǎn)生毛刺， 甚至損壞模具刃口， 降低模具壽命。 因此，在考慮提高材料利用率的同時(shí)， 必須根據(jù)零件產(chǎn)量、質(zhì)量和壽命，確定排樣方法和搭邊值。(2) 凹模結(jié)構(gòu)的影響對(duì)容易產(chǎn)生應(yīng)力集中而開(kāi)裂的凹模結(jié)構(gòu)，可以采 用組合結(jié)構(gòu)或鑲拼結(jié)構(gòu)，以及預(yù)應(yīng)力結(jié)構(gòu)，從而提高模具使用壽命。(3) 間隙的影響當(dāng)間隙過(guò)小時(shí)，壓縮擠壓利害，摩擦力增大，磨損增 大，側(cè)面的磨損加劇，沖裁后卸料和推件時(shí)，材料與凸、凹模之間的摩擦 還將造成刃口側(cè)面

14、的磨損比端面的磨大大，同時(shí)也容易造成凸、凹模溫度 很高，把金屬碎屑吸附在刃口側(cè)面，形成金屬瘤，使凸、凹模出現(xiàn)崩刃或 脹裂現(xiàn)象。因此，過(guò)小的間隙對(duì)模具壽命極為不利。間隙太大，會(huì)增加凸 模與凹模端面邊緣的集中應(yīng)力，致使壓應(yīng)力急劇增加，于是刃口邊很快屈 服變形而失去棱角。因此又增加了沖裁力，進(jìn)而使刃口邊更快磨損，降低 模具壽命。但為了減小凸、凹模的磨損，延長(zhǎng)模具使用壽命，在保證沖裁 件質(zhì)量的前提下，設(shè)計(jì)時(shí)適當(dāng)采用較大間隙是十分必要的。(4) 模具導(dǎo)向結(jié)構(gòu)對(duì)壽命的影響可靠的導(dǎo)向?qū)τ跍p小工作零件的磨 損，避免凸、凹模啃傷是非常有效的。特別對(duì)無(wú)問(wèn)隙或小問(wèn)隙沖裁模、復(fù) 合模和多工位級(jí)進(jìn)模更為重要。為提高模具

15、壽命，必須根據(jù)工序和零件精 度要求，正確選擇導(dǎo)向形式和導(dǎo)向精度，所選擇導(dǎo)向精度應(yīng)高于凸、凹模 的配合精度。(5) 冷沖壓材料選取的影響冷沖壓材料應(yīng)滿足制件的設(shè)計(jì)要求和沖壓 工藝要求，否則容易損傷模具，降低模具使用壽命。冷沖壓材料表面質(zhì)量 不好，沖壓時(shí)制件易破裂，也易擦傷模具。冷沖壓材料塑性不好，變形量 小，沖壓時(shí)制件易破裂，也易擦傷模具。另外，材料的厚度公差應(yīng)符合國(guó) 家標(biāo)準(zhǔn)。因?yàn)橐桓睕_模適用于一定材料的厚度，成形、彎曲、翻邊、引伸 模具的凸、凹模結(jié)構(gòu)間隙是直接根據(jù)材料厚度來(lái)確定的。所以材料厚度不 均勻，會(huì)導(dǎo)致廢品產(chǎn)生和模具損壞。2模具材料對(duì)模具壽命的影響 模具材料對(duì)模具壽命的影響是模具材料性質(zhì)

16、、化學(xué)成分、組織結(jié)構(gòu)、 硬度和冶金質(zhì)量等的綜合反映。其中，材料性質(zhì)和熱處理質(zhì)量影響最為明 顯。模具材料性質(zhì)對(duì)模具壽命的影響是很大的。如將同一種工件，使用不 同的模具材料做彎曲試驗(yàn)，試驗(yàn)結(jié)果：用9Mn2材料，其壽命為5萬(wàn)次；用Crl2MoV滲氮，其壽命可達(dá)40萬(wàn)次。因此，在選用材料時(shí)，應(yīng)根據(jù)制 件的批量大小，合理選用模具材料。模具工作零件的硬度對(duì)模具壽命的影 響也很大。但并不是硬度愈高、模具壽命愈長(zhǎng)。這是因?yàn)橛捕扰c強(qiáng)度、韌 性及耐磨性等有密切的關(guān)系。有的沖模要求硬度高，壽命長(zhǎng)。如采用 T10 鋼制造沖模，硬度為 5458HRC只沖幾千次，制件毛刺就很大。如果將 硬度提高到6064HRC則刃磨壽命

17、可達(dá)23萬(wàn)次。但如果繼續(xù)提高硬度， 則會(huì)出現(xiàn)早期斷裂。有的沖模硬度不宜過(guò)高，如采用Crl2MoV制造凹模硬度為5862HRC時(shí)，一般壽命為23萬(wàn)件，失效形式是崩刃和開(kāi)裂以及 如果將硬度降到5458HRC壽命提高到56萬(wàn)件，但硬度降低到50 53HRC會(huì)出現(xiàn)凹模刃口易磨鈍現(xiàn)象。由此可見(jiàn)，模具硬度必須根據(jù)材料性 質(zhì)和失效形式而定。應(yīng)使硬度、強(qiáng)度、韌性及耐磨性、耐疲勞強(qiáng)度等達(dá)到 特定沖壓工序所需要的最佳配合。3模具的熱處理質(zhì)量與表面強(qiáng)化對(duì)壽命的影響 模具的熱處理質(zhì)量對(duì)模具的性質(zhì)與使用壽命影響很大。實(shí)踐證明，模具工作零件的淬火變形與開(kāi)裂，使用過(guò)程中早期斷裂，雖然與材料的冶金 質(zhì)量、鍛造質(zhì)量、模具結(jié)構(gòu)及

18、加工有關(guān)，但與模具的熱處理關(guān)系更大。根 據(jù)模具失效原因的分析統(tǒng)計(jì)，熱處理不當(dāng)引起的失效占50 以上。實(shí)踐證明，高級(jí)的模具材料必須配以正確的熱處理工藝，才能真正發(fā)揮材料的 潛力。模具工作零件表面強(qiáng)化處理的目的，是獲得外硬內(nèi)韌的效果，從而 得到硬度、耐磨性、韌性、耐疲勞強(qiáng)度的良好配合。模具表面強(qiáng)化處理方 法很多， 表面處理的新技術(shù)工藝發(fā)展很快。 除氮碳共滲和離子氮化、 滲硼、 滲鈮、滲釩、表面鍍硬鉻和電火花強(qiáng)化外，化學(xué)氣相沉積(CVD)和物理氣相沉積(PVD)已逐步采用。經(jīng)CVD和 PVD處理后，模具表面覆蓋一層超硬 物質(zhì)，如 TiC、 TiN 等。硬度極高、耐磨性、耐蝕性、抗黏合性很好，可 提高

19、模具壽命幾倍到幾十倍。4沖模零件的制造精度對(duì)模具壽命的影響 沖模制造的精度與使用壽命關(guān)系很大，特別是模具表面粗糙度對(duì)模具影響很大。如用Crl2MoV鋼制造落料模，如果表面粗糙度值 R=1. 6 m時(shí), 其壽命為3萬(wàn)件左右。如經(jīng)精拋光，表面粗糙度值 R =0. 4 m,壽命可提 高到 45 萬(wàn)件。因此，對(duì)模具工作零件表面，一般都要經(jīng)過(guò)磨削、研磨、 拋光等精加工和精細(xì)加工。5. 其他方面對(duì)模具壽命的影響(1) 壓力機(jī)的精度不高，也易使沖模損壞。(2) 沖模在壓力機(jī)上安裝的正確與否及操作者的技術(shù)水平高低，對(duì)模 具壽命也有很大影響。(3) 沖模的保管和維護(hù)好壞，以及使用潤(rùn)滑劑的情況，也影響模具使 用壽

20、命。6. 結(jié)語(yǔ)在實(shí)際生產(chǎn)中，對(duì)于薄板沖模使用，很少出現(xiàn)非正常磨損的情況。但對(duì)于厚板沖模時(shí)則發(fā)現(xiàn)易出現(xiàn)非正常磨損，我們總是針對(duì)出現(xiàn)的問(wèn)題進(jìn)行 研究總結(jié)。因?yàn)橐桓崩錄_模，從設(shè)計(jì)、加工制造、裝配、調(diào)試到安裝、使 用，都耗費(fèi)了眾多工時(shí)，同時(shí)沖模的凸、凹模使用的材料，大都是優(yōu)質(zhì)合 金鋼。因此，沖模的成本都是比較高的。所以在生產(chǎn)中了解影響沖模壽命 的因素及采取相應(yīng)的對(duì)策來(lái)指導(dǎo)生產(chǎn)，具有重大的現(xiàn)實(shí)意義。Die Life of cold stamping die and mprovementsOverview of stamping dieStamping Die - Stamping in the cold

21、, the material (metal or non-metallic) processing into parts (or as Die). Press - is at room temperature, using the die installed in the press to put pressure on the material to produce a separation or plastic deformation, and thus to obtain the necessary parts of a pressure processing method. Stamp

22、ing die in the form of many, the general categories according to the following main features:1. According to the technical nature of(1) Die along the closed or open contour the material are derived from mold. If blanking die, punch die, cut off the mold, cut mode, cutting mode, split mode, etc.(2) b

23、ending mode to blank or blank sheet along a straight line (curved line) to bend, deform, and thus obtain a certain angle and shape of the workpiece in the mold.(3) The drawing die is madeof the blank sheet opening , direct copy the shape of the die shape, the material itself, generate only local pla

24、stic deformation of the mold. Such as the bulging mode, reducing the die, expansion die, forming die rolling, flanging mold, plastic mold.2. According to the degree classification process combination(1) single process model in a press tour, just completed a die stamping process.(2) composite model i

25、s only one station, in a press tour, at the same station at the same time to complete more than two or two die stamping process.(3) Progressive Die (also known as the modulus of continuity) in the feeding direction, rough, with two or more of the station, at the press of a visit, work in different p

26、laces on the completion of two or two successive Road over stamping die process. Chong called cold stamping die Die-wide.Cold stamping die is used in cold stamping die mold industry, and accessories required for methods, , Preparation is the solution of zirconia, yttria solution, praseodymium oxide

27、solution, according to a certain percentage of alumina solution when mixed liquor, ammonium bicarbonate infusion, by co-precipitation synthesis of ceramic materials, molds and accessories needed for raw materials, reaction precipitate generated by the treatment, drying, calcining and accessories by

28、after forming, sintering, finishing, they will is the invention made of cold stamping dies and parts and long service life, the process does not appear in the press and its parts and stamping die bond generated the phenomenon of stamping surface is smooth, no glitches, can replace traditionalsteel.D

29、ie with the main partsDie stamping tools is the main process equipment, stamping rely on the relative movement under the mold completed. Processing time because the upper and lower mold between the constant division and, if continued operation of the fingers of workers to enter or remain in the mold

30、 closed, there will certainly pose a serious threat to their personal safety.(A) of the mold main parts, function and safety requirements1. Working parts is a direct punch to blank forming the working parts, therefore, it is the key to mold parts. Punch not only sophisticated and complex, it should

31、meet the following requirements:(1) be of sufficient strength, can not be broken or destroyed during stamping.(2) should be appropriate to its material and of the parts installed blank, there are pins (board), gauge pin (plate), lead is sold, guide plate, knife set from the side, side pressure etc.D

32、esign should be considered when positioning parts easy to operate and should not , location to facilitate observation, preferably in the forward position, contouring to correct the pin location and positioning.3. Binder, unloading and discharging parts binder components are blank drawing blank of th

33、e tangential pressure arch formed folds. The role of pressure plate to prevent movement and bounce blank.Top of the device, discharge boards role is to facilitate the pieces and clean up waste. Themby the spring, rubber and equipment, putting on the air-cushion support, can moveup and down, knocking

34、 out pieces of the design should in the operating groove milling out empty- around the plate, to prevent finger inserted into or foreign objects inside, exposed surface edges should be blunt down.4. Guide parts and guide sleeve guide pin is the most widely used part of a guide. Its role is to ensure

35、 punch the punching clearance when accurate match. Therefore, the guide posts, guide cover the gap should be less than the blanking clearance. Guide Post located next mold base, to ensure that the stroke bottom dead center, the lead column in the template on the face over the top for at least5 to 10

36、 mm.Guide columns should be arranged far away from the module and the pressure plate in the area, so the operators arms do not get to take over the lead column material.5. Supporting and clamping the upper and lower parts which includes templates, die the template is the basis of the cold die parts,

37、 other parts are respectively fixed at the top. Template plane size, especially around the direction to be compatible with the workpiece, too large or too small are not conducive to action.Some molds (blanking, punching type mold) to the pieces of convenience, be set up under the mold plate. At this

38、 time the best and the template plate connected between the screw, the two plate thickness should be absolutely equal. Plate spacing out the pieces to be able to prevail, not too much, so as not to break the template.6. Fastening parts which includes screws, nuts, springs, pins,washers, etc., are ge

39、nerally used standard parts. Die more with the amount of standard parts, design choice and flexibility should be tightened to ensure the top out of the need to avoid exposure to the surface fastener operating position, the staff and impede operation to prevent bumps.Die with the development ofSince

40、reform and opening, with the rapid development of the national economy, the market demand with the growing Die. In recent years, Die with the industry around 15% growth rate of the rapid development of industrial enterprises with ownership Die components also changed dramatically, in addition to the

41、 professional mold factory outside of state-owned, collective, joint ventures, wholly-owned and private a rapid development.As with the accelerating pace of international integration, the increasing competition in the market, it increasingly recognized product quality, cost, and new product developm

42、ent capacities. The cold die manufacturing is the most basic elements of the chain, one of the cold die manufacturing technology to measure a countrys manufacturing sector important symbol of the level, and largely determine the viability of enterprises.Die with enterprises to increase in recent yea

43、rs manytechnological advances for investment, technological progress will be seen as an important driving force for enterprise development. Some domestic enterprises to use UG, Pro Engineer, I-DEAS, Euclid-IS and other international commonsoftware, individual manufacturers stampingdie design.A car c

44、over mold as the representative of a large stamping die manufacturing technology mold factory, mold manufacturers such as FAW mold center able to produce some car cover mold. In addition, manyresearch institutions and universities to carry out technology research and development of mold. After years

45、 of effort, in the mold CAD CAE CAM technology improving quality and reducing mold die design and manufacturing cycle, and so contributed.Although China Die with the industry over the past decade many ways compared with the industrialized countries there is still a large gap. For example, the precis

46、ion machining equipment, processing equipment in Die with the relatively low proportion; CAD CAE CAM technology penetration is not a considerable number of large, sophisticated, complex and long Die life with dependence on imports.With the continuous progress of science and technology, modern indust

47、rial production of increasingly complex and diverse, product performance and quality is ever increasing, thus the cold stamping technology put forward order to adapt to the cold stamping technology industry needs, cold stamping technology itself also in innovation and development. cold stamping tech

48、nology idea is to improve and expand as much as possible the advantages of the cold stamping process, to overcome its shortcomings. in the cold stamping technology development, should note the following aspects:(1) cold stamping technology process parameters should be properly identified and Die wit

49、h the work of some of the shape and size, to improve the quality of stamping parts and shorten the new product production cycle should be in strengthening the metal forming the basis of theoretical studies, to metal forming theory to practice can produce a direction, and gradually establish a close

50、connection with the actual production of the advanced process of calculation. abroad to use plastic finite element method, automobile parts forming process of the stress and strain analysis and computer simulation to predict the forming part of a process plan on the possibilities and potential probl

51、ems.(2) to accelerate product replacement, mold design to overcome the shortcomings of a long cycle. Should vigorously carry out computer-aided design and manufacture of molds (CAD CAM) Research. In my country, paying particular attention to strengthening the multi-position progressive die CAD CAM T

52、echnology.(3) to meet the needs of massproduction, and reduce labor intensity. Should strengthen cold stamping of mechanized and automated, so that the average, small pieces of a multi-position progressive die production, production reached a to further improve stamping productivity.(4) expand the s

53、cope of application of cold stamping production.So cold pressing both suitable for mass production, but also for small batch production; both the general accuracy of product production, but also can produce precision parts. Should pay attention to development such as fine blanking (especially thick

54、material fine blanking), forming addition, the performance improvement of sheet metal stamping, mold new material, die development of new processing methods should be further strengthened.Die with life and CountermeasuresDie with the life of the workpiece by punching out the number of terms. Many fa

55、ctors affect the life Die. There are die structure design, manufacture molds used in the punch and die materials, die quality and surface die manufacturing parts andcold stampingmaterials selection. In addition, there are die installation, adjustment, use and maintenance.1. Die Design on Life(1) Lay

56、out design of layout methods and take the boundary value a great impact on the die life, too small to take the boundary value, often causing rapid wear and convex mold, die bite wounds on the.Starting from material savings, take the boundary value smaller the better, but take the edge is less than s

57、ome value, the cut surface of the mold and the quality of life adversely. There will be left behind in the blanking die Q-gap were to produce spare parts glitch, or even damage the die edge, reduce die life. Therefore, consider increasing the material utilization of the same time, parts must yield,

58、qualityand life expectancy to determine the layout methodsand take the boundary.(2) die structure prone to stress concentration on the cracking of the die structure, composite structure can be used or mosaic structure, and prestressed structure to enhance the mold life.(3) the impact of clearance wh

59、en the gap is too small, compressed extrusion of interest, increased friction, increased wear, the wear side of aggravated discharge and push pieces after blanking time, materials and convex, the friction between die will cause wear and tear than the end edge on the side of the grinding much, but also easily lead to convex, concave mold temperature is of