冲头

椭圆形冲头放大图的公切圆作图法

Enlarged Drawing of Elliptical Head by Common Tangent Circle Drawing

冲头压入半无限体的矢量分析解法

Analytical solution to vector of formed punch pressed into semifinite medium

该文对热冲压用DT钢结硬质合金角冲头的强化处理进行了研究。

This paper has studied that the strengthening processing of DT steel-bonded carbide angular punch for hot-punching .

运用有限元和神经网络为SHPB装置构造理想冲头

Construction of ideal striker for SHPB device based on FEM and neural network

对采用PVD、CVD和PCVD表面涂覆处理的六角切边模和内六角冲头的生产使用情况和使用寿命进行了比较，其中PCVD涂层模具寿命比未涂层模具提高一倍以上。

The service lives of shear dies and punches treated by PVD , CVD and PCVD are compared .

高盛称其在aig不存在“实质性风险敞口”，它所持有的是现金抵押贷款和对冲头寸。

Goldman said that it had " no material exposure " to AIG , that it held cash collateral as well as hedged positions .

对GCr15钢药物冲头的磨损机制进行了研究。

The abrasion mechanism for tablet punch pin was studied .

对应于不同杆径的SHPB试验装置，设计并加工了能实现半正弦应力波加载的异形冲头系列。

Striker series which can realize a half-sine loading waveform in the input bar were designed and processed corresponding to the SHPB equipments .

结果表明：ZA27合金冲头式挤压铸造工艺参数影响的主次顺序为比压、铸型温度、浇注温度和保压时间。

The result shows the order of influential factors as : specific pressure , die temperature , pouring temperature and pressure holding time .

研究了半固态A356铝合金浆料的成形温度、压射比压和压射冲头速度对半固态A356铝合金流变压铸充填性的影响。

The effect of forming temperature , injection pressure and piston velocity on the filling ability of semi-solid A356 aluminum alloy slurry were investigated .

试验结果表明：在冲头式挤压铸造工艺条件下α和β相已经分解，α和β相的分解程度对ZA合金的强度和塑性有直接的影响。

Results show that and phase have been decomposed under the technology of punch squeeze casting . The and phase decomposition influences the strength and the ductility of ZA alloy .

利用推导出的位移基内时本构有限元模拟了半球形冲头胀形问题，并把它的解与Mises屈服模型的解进行了比较，两者吻合较好，表明了本文方法是正确与可靠的。

Bisection Method is modified to solve the nonlinear equation . The displacement-based endochronic finite element method is applied to simulate the hemispherical punch bulging process and compared with the mises yield model .

针对大直径岩样专用SHPB试验装置存在的三维效应问题，从三维实体研究入手，利用非线性动力分析有限元程序对不同形状系列冲头进行了实体模拟；

In light of the three-dimensional effect of split Hopkinson pressure bar ( SHPB ) device for large diameter rock specimen , solid simulation is conducted with three-dimensional nonlinear dynamic finite element code ;

冲头在780℃加热保温4min得到化学成分不均匀的奥氏体，淬火后可以获得大量的、细小的混合马氏体和细小的未溶碳化物。

The punch heated at 780 ℃ for min will gain non - homogeneous astatine in chemical component .

并对其制备的TiN、TiC、Ti（CxNy）超硬膜进行了显微硬度和化学成份等分析，最后介绍了该项技术在冷挤压冲头上的应用实例。

The paper also presents the investigation of microhardness , surface and fracture zone feature , crystalline structure and chemical composition of TiN , TiC and Ti ( C_xN_y ) super-hard coatings . Finally , the paper gives out application cases of the PCVD technique in the cold extrusion punch .

本文依据Kirchhoff薄壳理论与J2塑性流动理论，提出了分析轴对称刚性冲头胀形成形的大变形弹塑性拉格朗日有限元分析的数学模型。

According to Kirchhoff 's theory of elastic-plastic finite deformation of thin shell and the theory of J2 plastic flow , a mathematical model is proposed for large deformation elastic-plastic Lagrangian finite element analysis of rigid punch made of thin metal plate .

对高速钢（W6Mo5Cr4V2）冷挤压冲头和麻花钻作了超低温处理，并应用于生产实践。

The high speed steel ( W6Mo5Cr4V2 ) cold extruding dies and twist drills have been treated with the technology of super cryogenic treatment , and applied to practical production .

对冲头有、无内锥两种形式挤压过程进行数值模拟，利用罗德系数、J2应力偏量不变量等特征量进行变形分区，并利用7050铝合金进行挤压试验验证。

Numerical simulations on extrusion process with and without the inner cone punch were carried out , and the division of deformation was proposed by employing the characteristic quantity such as Lode parameter and invariant of the deviator ( J_2 ) .

本文介绍了西德Walter公司GPT-M-KE多瓣模自动压机冲头的冷却系统、冲头结构和它的温度自动控制装置，它对维护高速自动压机的正常运行、提高产品质量均有重要意义。

This paper introduced " GPT-M-KE " plunger cooling system produced by Walter Co. West Germany which can automatically control the plunger temperature . It is of significance for keeping the press in normal operation at a high speed , and for improving the quality of the glasswares .

等效应变速率与冲头的运动速度成正比；

The equivalent strain rate is proportional to the punch speed ;

带内锥冲头挤压过程中金属变形流动行为研究

Study of Metal Flow Behavior during Extruding with Inner Cone Punch

请勿使用尖刺冲头或数字压纹工具。

Do not use prick punches or number embossing tools .

该方案是添加一个压边圈保护镶块，以避免它因与主冲头直接接触而被其磨坏。

The project was adding one blank holder insert to protect it .

冷挤压冲头的损坏形式研究

Study on the Failure form of the Cold Extrusion Drift

双锥冲头反挤杯形件的主应力解

The Slab Solution for Biconical Punch for Backward Extrusion of Cup-like Piece

所有的冲头及剪边冲必须有废料顶出器。

All punches and trim steels must have slug ejectors .

几种常用压铸压射冲头的综合比较与分析

Comprehensive Comparison and Analysis of Several Common Die Casting Injection Punch Heads

压射冲头激光表面处理工艺参数的优化设计

The Parametes Optimun Design of the Die-Casting Plunger by Laser Surface Treatment

高速冲头有界入水初始阶段的数值模拟

Numerical Simulation Of High Speed Body Entry Into Bounded Water

钢结硬质合金在冷挤压冲头上的应用研究

Application and Study of Steel Bonded Carbide to Extrusion Stem