The aim of computer simulation is to recure the processes of material forming, forcast the compacting defects, choose and change the die structure, the process parameters (motion history of the mutilpunches), and optimize the compact design.

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The moulds and precision functional parts have applied to the machine tool made from the well-known and main manufactures in the world, such as Amada, Strippit, Murata, Trumpf, YangLi, JFY, Yawei and the like. They are widely used the field of sheet metal processing such as metal punching, sheet metal forming, etc..

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The high-speed multi-stage forging is an advance forming technique. It is different from the traditional die forging process. The improper preform design will lead to some problem in actual production, such as too large load, underfill, folding and so on.

多工位高速鍛造是一種節(jié)能減耗的先進(jìn)成形技術(shù)，與傳統(tǒng)的單工位多工序鍛造有較大區(qū)別北京熟女大叫喊爽视频，不合適的預(yù)鍛工位模具設(shè)計(jì)在生產(chǎn)中會(huì)造成載荷過大激情视频激情文学在线、鍛件充填質(zhì)量差、折疊等問題91中文字幕国产。

In formulates after the formed craft card, starts to carry on the mold the structural design.

在制定出成形工藝卡以后国内精品免费视频在线拍，開始進(jìn)行模具的結(jié)構(gòu)設(shè)計(jì)。

In formulates after the formed craft card, starts to carry on the mold the structural design.

在制定出成形工藝卡以后男女交性无遮挡在线观看，開始進(jìn)行模具結(jié)構(gòu)設(shè)計(jì)国内揄拍国内精品视频。

According to the developing tendency all over the world,the paper introduces the theory of laser forming and the and development in rapid metal tooling,forming,boring,incising,et al,points out the significance and the value of laser in the field of plastic forming .

結(jié)合國(guó)內(nèi)外的發(fā)展動(dòng)態(tài)，簡(jiǎn)述了激光加工原理精品国产欧美一区二区五十路，介紹了激光在快速制模日韩一级特黄毛片在线看、成形、打孔色诱久久av无码电影网站、切割及模具表面強(qiáng)化等方面的應(yīng)用現(xiàn)狀无遮挡奶头污免费网站，并強(qiáng)調(diào)指出了激光在塑性加工領(lǐng)域中應(yīng)用的重大意義和價(jià)值。

Gloabl search and local search arithmetic of searching contact point is parented.

根據(jù)板料成形過程中模具的運(yùn)動(dòng)特點(diǎn)91香蕉国产在线观看人员青，提出了全局搜索和局部搜索的接觸點(diǎn)搜索算法人操在线视频97。

Taking "zheng zhou nissan pickup" roof for example,reasonable sequence is technologically arranged,particularly considering the difficulty on its reshaping and blank take out ① stretch forming ② towing ③ riming ④ reshaping.

介紹了汽車上常見的外覆蓋件沖壓工藝方案的確定過程，并以&鄭州尼桑&輕型皮卡&頂蓋&為例，針對(duì)此件成形難大秀视频网，取件難這一特點(diǎn)国产每日，確定了合理的沖壓工序?yàn)棰倮英谛捱參鄯參苷卧谙逜级网站，且著重介紹整形模具的設(shè)計(jì)要點(diǎn)及整形以后順利取件等措

3D-CTM (Coupled Thermo-Mechanical Forming Simulation) software for precision forging process of aero-engine blade was developed. The key technologies of 3D coupled rigid-viscoplastic thermo-mechanical FEM simulation of blade forging process were studied systematically. By using the remeshing method of contracting from the boundary to the inner, new mesh system from old distorted mesh system can be obtained. A method of modifying the position of nodes touching on the die according to its original normal was proposed to avoid "dead lock" problem due to uncontinuity of normal of scatted die meshes. The pseudo-static iterative algorithm was used to simplify the coupled thermo-mechanical computation. In particular, formulations to determine relaxation factor β was established for rigid viscoplastic FEM adopting penalty function method, and an improved cubic factor rapid algorithm derived from these formulations was proposed by combining with the advantage of advance and retreat search method.

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According to the velocity filed mentioned above, the contour of the drawing die was rationally designed. To prove its applicability and superiority, FEM software, MARC and SUPERFORM, were used to simulate the drawing process of cross tube in "conical die" and "streamlined die".

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