双联盒拉深工艺与模具

分析了双联盒的拉深成形工艺及其拉裂缺陷，根据数值模拟结果，设计了双联盒的拉深工艺，并介绍了拉深模具结构。     

304奥氏体不锈钢拉伸过程的数值模拟

不锈钢板材在拉伸成形过程中应变硬化严重,影响因素复杂,易出现起皱、破裂、粘模等现象。运用有限元软件,对不同拉伸工艺条件下304奥氏体不锈钢圆筒件的拉伸成形过程进行了数值模拟分析。     

电子表格在铸造熔炼配料计算中的应用

根据铸造熔炼配料计算的理论,建立了一种电子表格。通过实例介绍了其应用。通过与手工计算的比较,得出其优点。重要的是,避免了计算过程中人为因素引起的错误,对提高铸造熔炼配料计算的质量有现实意义。     

托板螺母冲压开裂原因分析

由0Cr17Ni5Mo3沉淀硬化不锈钢制造的托板螺母零件,在冲压拉伸成型过程中,在进行第一次及第二次冲压拉伸时零件发生开裂,大约有30%零件发生开裂.利用扫描电子显微镜、光学显微镜以及化学成分和力学性能的测试手段,对材料和断口进行深入研究,并开展了模拟试验.结果表明:裂纹是由于材料中的σ相引起的;最后确定了合适的固溶工...     

不锈钢仪器盒拉深成形工艺

在分析不锈钢仪器盒成形工艺特点的基础上，设计了该零件的拉深成形及其模具结构。     

基于GUI的船舶液压推进系统计算辅助设计

为减少船舶液压推进系统计算工作量,采用MATLAB软件的GUI图形界面系统,开发一套船舶液压推进系统计算程序。通过人机交互界面,该程序可以实现不同推进方案下船舶液压推进系统主要部件的参数计算,有效地减少了计算工作量,提高了计算效率。     

Hydromechanical Deep-Drawing of Aluminium-Alloys at Elevated Temperatures

This paper presents a technology that combines the different effects used in hydromechanical and warm deep drawing to reduce the drawing force and to increase the transmittable drawing force in the deep drawing process of aluminium sheets by flange heating and by using a counter pressure. Adequate process parameters and an optimised tool design are discussed in thermo-mechanically coupled Finite Element Simulations. The required system parameters, such as temperature and strain rate dependent flow curves, temperature dependent friction coefficients and heat transfer coefficients, were detected in different model experiments for the numerical simulations. Experimental results are presented to highlight the possibilities and limitations of this forming method.     

球墨铸铁在拉深模中的应用

由于球墨铸铁自身的特殊性，使其部分取代模具材料在理论上成为可能，通过对没箱拉深模的偿试设计，使其成为现实，为球墨铸铁开壁了新的应用领域。     

拉伸过程中润滑及润滑剂的选用

通过对拉伸板料进行分区，详细论述了板料拉伸成形时的摩擦与润滑特点，介绍了润滑剂的种类及特点，并重点介绍了一些新型润滑剂，讨论了这些润滑剂的使用，为板料拉伸中润滑剂的选择和使用提供了理论根据和实用参考。     

Study on Control of Deep-Drawing Ear for Orthotropic TA2M Sheet Metal

针对具有显著面内异性的钛合金TA2M板料,给出了材料厚向异性指数R值的三角函数分布规律, 在此基础上,基于势流原理和边界元法,提出了面内异性的钛合金板料在拉深成形中,凸缘外边界势值按材料的各向异性规律分布的假设,并计算得出合理的毛坯形状。经过试验验证,所建立的方法合理正确,计算得到的毛坯可有效避免凸耳现象的产生。     

A Program for Metallurgical Engineering Education

A discussion of how industry can aid educators in the training of metallurgists. Industry’s engineering needs are presented, and a metallurgical engineering-science curriculum is offered as a possible solution.     

Improving the Hydromechanical Deep-Drawing Process Using Aluminum Tailored Heat Treated Blanks

The present work demonstrates the effectiveness of combining the hydromechanical deep-drawing process with the Tailored Heat Treated Blank(THTB) technique. In the hydromechanical deep-drawing process, the fluid pressure is used for postponing the fracture occurrence in the blank, while the THTB technique allows to create a material property gradient through a suitable artificial aging treatment carried out prior to the forming process. Since the number of process variables is large, in the present work the authors propose an optimization loop for the determination of the parameters controlling the extension of the blank regions to be subjected to the aging treatment and the temperature levels to be set during the heat treatment. The proposed methodology couples a simple finite element model(Abaqus) with a multiobjective optimization platform(mode FRONTIER). A preliminary experimental campaign was carried out for determining the effect of the aging treatment on the mechanical(through tensile tests) and deformative(through formability tests)behavior of the AC170 PX aluminum alloy. Optimization results prove the effectiveness of the adopted methodology and put in evidence that the adoption of properly aged blanks in the hydromechanical deep drawing allows to increase the limit drawing ratio and to simplify the process since it is conducted at room temperature.     

Superplasticity and Micro-arrayed Deep-Drawing Behavior of Ni-Co/GO Nanocomposite

In this article, Ni-Co/GO nanocomposite was fabricated by AC pulse electrodeposition method. The room temperature strength tests and the superplasticity of the nanocomposite were investigated by the tensile tests. A 5 × 5 micro-arrayed deep-drawing die was designed to explore the feasibility of micro-forming. The as-deposited material has a narrow grain size distribution with a mean grain size of 50 nm. The addition of GO as a reinforcing phase can effectively enhance the room temperature tensile strength of the nanocomposite, but reduce the plasticity. When adding GO to the plating bath, a maximum elongation of 467% was observed for the specimen with a GO content of 0.01 g/L at 773 K and a strain rate of 1.67 × 10^?3 s^?1 by tensile tests. Micro-arrayed deep-drawing tests were subsequently performed with male die diameter of 0.58 mm and female die diameter of 0.8 mm. The experimental relative drawing height values were measured and compared with the deep-drawing parts without GO additive. It is found that the micro-arrayed deep-drawing with rigid male die at high temperature was feasible and forming parts with good shape could be got. The thickness distribution analysis of the deep-drawing parts showed that wall thickness changed ranging from 53 to 95 μm, and the thickness reduction at the punch fillet is the most obvious.     

轧制工艺对深冲钼带组织和性能的影响

通过轧制温度、轧制方式实验,以及织构和力学性能分析,研究了轧制工艺对液晶显示背光源用的深冲钼带的组织和性能的影响。结果表明：采用低温开坯,然后低温两次交叉轧制,再进行一次交叉轧制的工艺,使钼带在1000℃退火后具有很强的{001}〈011〉板织构和弱的〈111〉丝织构;钼带纵、横向组织几乎完全一致,都为细小均匀、相互搭接的纤维状组织;钼带经过消除应力退火后,纵、横向不仅都具有较高并相近的延伸率,而且强度也相近,杯突值较高。由于强度和硬度适中,各项性能形成了很好的匹配,使钼带各向异性大大减弱,深冲性能良好。     

Effect of Texture on Deep-Drawing Property of Air-Condition Aluminium 1050H19 Foils

The textures induced by deformation processes of different crafts in air-condition used aluminium 1050H19 foils were measured by using X-ray goniometer. Combining with TEM analysis, effect of texture on deep-drawing property was discussed. It is show that deformation textures in the specimens, on which four types of rolling-crafts are carried out respectively, are all typical Cu components, and recrystallized R-, Cube-texture don‘t exist. Cu-texture is still the predominant component with different orientation density according to different rolling-craft. To specimens which are prone to cracking, their orientation densities of Cu-textures are higher, their textures are stronger and they contain P- and Goss-texture, which are harder to be deformed. The analyses indicat that with the decrease in the rate of reduction/rolling-time and the execution of intermediate holding, textures that are harder to be deformed are eliminated and orientation density of Cu-texture is weakened. Thus, deep-drawing property of aluminium foils is improved.     

铸钢齿轮(齿圈)冒口的计算机设计计算

本文给出了一种利用计算机进行铸钢齿轮(齿圈)胃口设计计算的方法,它既能计算出所设计冒口的全部参数,也能计算出铸件重量,工艺出品率,延续度等,同时又能把结果打印出来,这种方法修改方便,结果精确,速度快效率高,解决了过去手工计算繁琐复杂和不精确的问题。     

板料拉伸成形中确定合理毛坯形状的理论方法综述

合理的毛坯形状不仅可以提高原材料的利用率，减少成形后的修边余量，而且能改善可成形性，大大提高成形质量。对此，人们提出了许多预测方法和估算方法。本着重对各种确定毛坯外形的理论方法做原理上的介绍及比较，并讨论了有关方法中存在的问题和今后研究的方向。