Hexagonal bolts are usually formed with cold heading. The process is classified as open-die forging and therefore its die design is less complicated. The mushroom-like head has to be sheared into hexagonal shape and the amount of the scrap is somehow significant especially for heading with short bolts or high alloy material. There is an increasing demand in increasing the gross profit by increasing the yield of workpiece material.

六角螺栓頭端通常以冷間頂鐵成形製程來(lái)製造国产精品第一区免费观看，由於冷間頂鐵屬於開(kāi)模鍛造亚洲欧洲中文字幕视频在线观看，模具設(shè)計(jì)較容易亚洲欧美激情国产综合久久久，但需以剪緣模再對(duì)蕈狀頭端沖剪成為六角頭女同在线视频一区二区，此剪緣后的廢料量不容忽視欧美apian，尤其對(duì)於長(zhǎng)度較小的螺栓国产乱人视频在线观看播放1，或其它應(yīng)用於緊扣件的高級(jí)合金而言911A片导航，藉由減少?gòu)U料以提高產(chǎn)品毛利的需求日益迫切。

The technological characteristics of the key part G1diaphragm of the electric gun of the kinescope is analyzed.

分析了彩色顯像管電子槍關(guān)鍵零件G1膜片的工藝特點(diǎn)欧美1级，介紹了成形該零件的子模式級(jí)進(jìn)模的排樣設(shè)計(jì)淫荡美女被强暴视频免费、模具結(jié)構(gòu)，并詳細(xì)介紹了各子模的結(jié)構(gòu)特點(diǎn)18以下禁止岁观看网站。

According to a survey of HDD development and its current situation at home, a new kind of equipment for hydrodynamic deep drawing has been developed, which was constructed on the basis of a conventional single-action press with general hydrodynamic deep drawing die sets.

在對(duì)充液拉深技術(shù)的發(fā)展和國(guó)內(nèi)具體情況調(diào)查的基礎(chǔ)上91综合视频在线，研制了基于通用單動(dòng)液壓機(jī)的通用充液拉深模架型式的充液拉深裝備，整個(gè)裝備由模架可以免费看的av网站、液壓控制系統(tǒng)和計(jì)算機(jī)自動(dòng)控制系統(tǒng)等三部分組成欧美二区在线综合亚洲欧美网站，實(shí)現(xiàn)了充液拉深成形過(guò)程的液室壓力和壓邊力的實(shí)時(shí)控制。

In this paper, the basic theory and work principle of cellular automata were introduced concisely. The influence of strain-rate and temperature on the number of nucleation and the mean size of R-grain, as well as the influence of cooling on ultimate microstructure of blade after forging finished off were considered. The microstructure evolution was simulated successful based on the DEFORM-3D. The simulated results agree well with growth kinetics of dynamic recrystallization of classical theory and physical experiment.

文章介紹了元胞自動(dòng)機(jī)模型的理論基礎(chǔ)和工作原理欧美野外激情人成视频在线观看，并根據(jù)葉片模鍛成形的特點(diǎn)免费黄色网站看亚洲，綜合考慮應(yīng)變速率、變形溫度對(duì)再結(jié)晶形核率與平均晶粒尺寸国产精品爱舒服，以及終鍛冷卻對(duì)葉片鍛件最終組織的影響三级片黄色网站在线无码免费观看，在DEFORM-3D平臺(tái)上，成功地仿真了葉片模鍛過(guò)程中的微觀組織演變在线视频一区色，得到了同經(jīng)典理論分析和物理實(shí)驗(yàn)結(jié)果吻合較好的動(dòng)態(tài)再結(jié)晶動(dòng)力學(xué)特征欧美性人。

It is shown that the stress triaxiliaty T has great effect on the damage evolution. When T goes up, the ductile damage tends to be intensified. When the core is harder than the sleeve, the larger the semicone angle the core fracture is more likely to occur.

斷裂預(yù)測(cè)結(jié)果表明，對(duì)于芯層金屬較硬的雙金屬的擠壓成形亚洲图区视频网，錐形模半模角α越大女人18毛片水真多在线视频，芯層金屬越容易發(fā)生斷裂，較大的摩擦因子有助于阻止芯層金屬的斷裂小草亚洲无码不卡免费在线观看视，這兩點(diǎn)結(jié)論與Avitzur由上限法所得的結(jié)論完全一致欧美精品亚洲人成在线观看。

The results show that the friction on the lower die surface is beneficial to the preforming;the clearance between the roller base and lower die obviously influences the base end and open end dime...

結(jié)果表明，預(yù)成形時(shí)下模端面摩擦屬有利摩擦国产一级婬片a免费播放口；旋輪底面與下模間隙對(duì)最終工件的底部及口部尺寸具有較大影響黑人操屄；旋輪沿徑向施加給工件的壓下量對(duì)腰鼓件質(zhì)量影響較大。

Based on the relations among the stress, final wall-thickness of thin-walled tube and the characteristics of tube material, original size, curling radius along with friction condition in a axially-compressed internal inversion process on right-angled fillet die, some analytical discriminants were established for judging if a double-layered tubular piece of aluminum alloy could be steadily formed from a certain-sized round tube via internal inversion process without interference and plastic instability of tube wall, and a method was put forward for determining the maximum and minimum usable curling radius or die fillet-radius for thin-walled tubes in the process.

基于薄壁管直角圓角模軸壓內(nèi)翻過(guò)程中各處應(yīng)力及最終壁厚與管材特性韩国日本欧美三级一级爱国产、管坯尺寸、卷曲半徑及摩擦條件之間的關(guān)系www.999国产，推出了判別任一鋁合金雙層管件可否由特定尺寸圓管穩(wěn)定內(nèi)翻成形而不出現(xiàn)管壁干涉與塑性失穩(wěn)問(wèn)題的解析判別式又粗又黄又爽视频免费看，指出了確定薄壁管圓角模內(nèi)翻卷曲半徑或模具圓角半徑極限值的方法。

After an investigation on the rules of this deep drawing process, a virtual orthogonal experimental design is adopted to determine the significance of processing parameters, die radius, blank holder force and friction coefficient, on the forming process.

同時(shí)爱操AV，采用正交試驗(yàn)分析方法激情男女AA欧美，研究了單位壓邊力、摩擦系數(shù)在线视频福利、凹模圓角半徑和凸凹模間隙等工藝參數(shù)无码国产日韩字幕视频播放器，對(duì)該拉深成形過(guò)程的影響規(guī)律哦美精品久久久。

Based on gaining high productivity and the high percentage of material consumption,We made the choice of using two dies to fulfill the design: one progressive die to execute punching, drawing and blanking.we use the second bending die with a wedge to get the two bends.

本設(shè)計(jì)以提高生產(chǎn)率及材料利用率為出發(fā)點(diǎn)，采用兩套模具進(jìn)行該啟瓶器的設(shè)計(jì)：第一套級(jí)進(jìn)模完成沖孔日韩AV黄色网址、拉深和落料欧美精品一区二区精品久久；第二套模具為楔塊式彎曲模，用來(lái)完成兩次彎曲成形一级毛片免费视频色欲。

The slip form spreading machine was used to construct the Taian-Qufu highway concrete pavement, and the machine can continuously complete the construction procedures (including spreading, vibrating, strickling, forming, float finishing and dowel bar setting) without fixed form, so this technology is advanced, and is worth extending.

泰曲路改造工程三合同段的混凝土路面采用滑模攤鋪機(jī)進(jìn)行施工免费人成在线观看网站照，滑模攤鋪機(jī)在不用固定模板的情況下可以連續(xù)完成攤鋪、振動(dòng)亚洲人人一区二区三区、刮平国产精品久久久久电影院87、成形、抹光以及打設(shè)傳力桿等工序2828一区二区欧美，工藝先進(jìn)特级女同一级毛片，具有一定的推廣價(jià)值。