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沖壓模具結構畢業(yè)設計-wenkub.com

2025-06-23 05:54 本頁面
   

【正文】 Plastic deformation stages: punching power reached its peak. Features section features stage In the first stage of sheet metal punch under pressure. First of all produce flexible pression, tensile, such as deformation, then punch a little squeeze into the sheet metal, sheet metal on the other side has a slight edge squeeze into the die, the punch Below the Department of slightly bending the material, die on the edge of the above material began Shangqiao, the greater the gap, bending and Shangqiao more serious, in the convex sheet metal, die cutting edge angle formed the initial collapse, then the internal material Stress has not been more than elastic limit, when the external force can be removed after the material restitution. This phase known as the elastic deformation stage. 3 fracture separation stages: to punch down, the pressure increased, microcrack growth. Coincidence, fracture, blanking of gradually declining. 2 plastic deformation stages: Punch increasing downward pressure on, until a change in plastic microcracks. 1 elastic deformation stages: Gang Jiechu sheet metal punch the initial stage, in elastic deformation. 5, pound die: punching in the shape of the mutual position of high accuracy, suitable for mass production.Punching the material properties of materials First, when punching materials separation process can be divided into three stages: 4, Die: of the material requirements of precise positioning, and shape each other in the hole location accuracy is assured. High productivity, has a punching accuracy, suitable for mass production. 3, I. Column: I. blanking spaceoriented guarantee uniform, blanking of the workpiece size highprecision molds long life, easy installation, suitable for mass production. 2, I. Plate: accuracy than the openhigh, suitable for simple beginning, not the size of the workpiece blanking pieces. Request not more than press tour guide plate thickness. 1, open mode: simple structure, small size, light weight, easy to manufacture, low cost, but low life expectancy, poor accuracy, suitable for precision Yaoqiubugao, the beginning of simple, lowvolume or blanking of the trial production. s how it works, directly or asked to die on the fixed on the position of the mold on the module, it handles through the mode of association with the press slider. Fixed on the next module is posed of the dieunder, and use clips fixed at the press table. Onandunder through I. I. oriented. Work, of the material sent to rely on positioning block material, when the module with the slider down, unloading first壓住sheet, and then convexconcave with access to the material above the workpiece. At this time the workpiece in the punch card and heard the top of the block, waste is also firmly behind the punch on. In the pickup mode, the workpiece by block through the roof top of the stretch from spring to die from the hole in the roof at the same time behind the punch on the waste discharge by the board on the elastic Xiediao spring, and then took part, this Blanking plete the whole process. Of the material sent to a further step, the next blanking blanking process, so a reciprocating. Second, the classification Die 再一次非常感謝的領導,老師以及與我一起討論的各位同學對我的關心和幫助,我才能夠完成我的畢業(yè)設計。在畢業(yè)之際,我要感謝那些幫助我的老師及同學。 下模座板加工工藝產(chǎn)品型號零件號零件名稱材料牌號備料規(guī)格每毛坯重量材料消耗定額毛坯種類下模座板HT200車間名稱共序號工序名稱及內(nèi)容機床名稱編號工具名稱刀具夾具量具1下料B=568mmL=810mmh2=75mm采購2畫線2XФ556XΦ736XФ22Φ71Ф73鉗工3加工2XФ606XΦ306XФ12鉆床日期工人代表日期審核者日期批準者標記更改原因及內(nèi)容更改者。 凹模加工工藝產(chǎn)品型號零件號零件名稱臺件材料牌號備料規(guī)格每毛坯重量材料消耗定額毛坯種類凹模T10A車間名稱共序號工序名稱及內(nèi)容一次加工數(shù)機床名稱編號工具名稱刀具夾具量具1氣割2線切割加工工作部分尺寸至要求線切割3畫線6XФ12 6 XФ33鉗工4鉆孔6XФ12 6 XФ33 鉆床熱處理車間5淬火HRC60646磨上下平面至63磨床擬定者日期工人代表日期審核者日期標記更改原因及內(nèi)容更改者日期 彈性卸料版。ha =40mm 凸模墊板厚度的確定,一般選取hb=10mm外形與與凹模外形尺寸一致。 上模座結構根據(jù)模具閉合高度、滑塊行程上下模座的參數(shù)得標準號為:BG/T 主參數(shù)為:d=55 L=320。操作者將制件清除。它與壓力機的配合應該遵守下列關系(HmaxHd)5H(HminHd)+105505H390+10545H400此設計中模具的閉合高度為407mm,滿足要求 模具工作過程即凸模在最高點時此時放入板料, 凸模往下滑動與凹模作用形成制件。2 。材料選用45鋼,熱處理的淬火硬度為48 ~ 52HRC, 以下。1 墊板 沖模在工作時,凸模要承受很大的沖裁力,這個力通過凸模的固定端傳遞到上模座。當外形尺寸太大不便于加工時,可采用分段組合。雖然大多數(shù)多工位級進模凸模與固定板的配合不是傳統(tǒng)的過盈配合,而是間隙配合。多工位級進模的凸模固定板一般結構上都是必要的,它不僅要安裝許多凸模,還要安裝一些其他零件,如側刃、導正銷、小導柱、小導套和安全保護裝置等。h3— 彈性元件壓縮到最低時的高度。沖孔的周長(2)卸料力 FX= (3)沖孔推件力 FT= (4)總沖壓力 F∑=F+ FT+ FX =(5)壓力機的公稱壓力 P0=(~) F∑=2901~3429KN 由于所沖壓的零件是規(guī)則圖形故壓力中心在其中心位置。(2)凸凹模刃磨有時不方便。方案二 落料沖邊孔成形沖六孔沖大孔,采用單工序沖裁。因此,該材料具有較高的彈性和良好的塑性,沖裁結構性較好。塊料只用于少數(shù)鋼號和價錢昂貴的有色金屬的沖壓。表面質(zhì)量好的材料,沖壓時不易破裂,不易擦傷模具,工件表面質(zhì)量好。而沖壓成形性能與材料的機械性能密切相關,通常要求材料應具有:良好的塑性,屈強比小,彈性模量高,板厚方向性系數(shù)大,板平面方向性系數(shù)小。由于大多數(shù)沖壓成形都是在板厚方向上的應力數(shù)值近似為零的平面應力狀態(tài)下進行的,因此,不難分析:在變形坯料的內(nèi)部,凡是受到過大拉應力作用的區(qū)域,就會使坯料局部嚴重變薄,甚至拉裂而使沖件報廢;凡是受到過大壓應力作用的區(qū)域,若超過了臨界應力就會使坯料喪失穩(wěn)定而起皺。材料的沖壓性能好,就是指其便于沖壓加工,一次沖壓工序的極限變形程度和總的極限變形程度大,生產(chǎn)率高,容易得到高質(zhì)量的沖壓件,模具壽命長等。工作時,坯料在下模面上通過定位零件定位,壓力機滑塊帶動上模下壓,在模具工作零件(即凸模、凹模)的作用下坯料便產(chǎn)生分離或塑性變形,從而獲得所需形狀與尺寸的沖件。 復合級進——在一副沖模上包含復合和級進兩種方式的組合工序。復合沖壓——在壓力機的一次工作行程中,在模具的同一工位上同時完成兩種或兩種以上不同單一工序的一種組合方法式。概括起來,可分為分離工序和成形工序兩大類;分離工序是指使坯料沿一定的輪廓線分離而獲得一定形狀、尺寸和斷面質(zhì)量的沖壓(俗稱沖裁件)的工序;成形工序是指使坯料在不破裂的條件下產(chǎn)生塑性變形而獲得一定形狀和尺寸的沖壓件的工序。主要表現(xiàn)在沖壓加工時產(chǎn)生的噪音和振動兩種公害,而且操作者的安全事故時有發(fā)生。據(jù)有關調(diào)查統(tǒng)計,自行車,縫紉機,手表里有80%是沖壓件;電視機,收錄機,攝像機里有90%是沖壓件;還有食品金屬罐殼,鋼精鍋爐,搪瓷盆碗及不銹鋼餐具,全都是使用模具的沖壓加工產(chǎn)品;就連電腦的硬件中也缺少不了沖壓件。例如,在宇航,航空,軍工,機械,農(nóng)機,電子,信息,鐵道,郵電,交通,化工,醫(yī)療器具,日用電器及輕工等部門里都有沖壓加工?! 。?) 沖壓時由于模具保證了沖壓件的尺寸與形狀精度,且一般不破壞沖壓件的表面質(zhì)量,而模具的壽命一般較長,所以沖壓的質(zhì)量穩(wěn)定,互換性好,具有“一模一樣”的特征。與機械加工及塑性加工的其它方法相比,沖壓加工無論在技術方面還是經(jīng)濟方面都具有許多獨特的優(yōu)點。沖模是將材料(金屬或非金屬)批量加工成所需沖件的專用工具。沖壓加工是一種金屬冷變形加工方法。4)需要經(jīng)常修磨和調(diào)整的部分盡量放在模具的下部。 此外.在設計沖模時,還必須對其加工、維修、操作安全等方面予以注意。 手不需伸人模具工作區(qū),比較安全多排沖壓法的應用 操作時出件困難.可能損壞彈簧緩沖機構.不作推薦 制件被頂?shù)侥>吖ぷ髅嫔?,必須?
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