preforming

Numerical Simulation of the Preforming Process of a Large Complex Forging

大型复杂形状锻件预成形顶镦过程的数值模拟

Optimal preforming die shapes design using sensitivity analysis method

基于灵敏度分析的预锻模具形状优化设计

Optimization design of metal preforming with aggregate function method

金属预成形优化设计及凝聚函数方法

Production of Special shaped Steel Wire STUDY ON RTM PREFORMING PROCESS

异型钢丝的生产RTM工艺的预成型技术研究

Research on the Multiple Objective Optimization of the Preforming Design during the Single Process Forging

单工序锻造过程预制坯多目标优化设计的研究

Effect of parent phase preforming on phase - change and form of martensite

母相预变形对马氏体相变及其形态的影响

Finite Element Analysis of Preforming for 840 Railway Wheel

840车轮预成形过程的有限元分析

Process Numerical Simulation on Hot Extrusion Preforming and Final Forging of Automobile Valves

气门热挤压预成形和终锻成形过程模拟

The article has introduced the cross wedge rolling preforming technology and its die design .

介绍了楔横轧制坯工艺及其模具设计。

Cross Wedge Rolling Preforming Technology and Die Design of Slip Joint Pliers

锂鱼钳楔横轧制坯工艺及模具设计

Precision cross wedge rolling preforming process for motorcycle crank

摩托车曲柄的精密楔横轧制坯工艺

Preforming of forged connecting rod by cross wedge rolling technique

连杆锻件的楔横轧制坯

Die preforming process in screw press

螺旋压力机模锻的制坯工艺

Study on RTM preforming process

RTM工艺的预成型技术研究

Research of this subject focuses on three important procedures of minitype bolt cold forming process – drawing , preforming and finish-forming .

课题主要对微型螺钉成形工艺中最重要的三个工序&拉拔、预成形和终锻成形进行研究。

The influence of granule size of waste PTFE , mass ratio of fillers and the preforming pressure to the performance of the product is studied .

研究了PTFE废料粒径、各种填料用量及预成型压力对产品性能的影响。

During the preforming , a preform with an expansion ratio of 70 % can be achieved by controlling the relationship between the internal pressure and the axial feeding force .

在预成形中，通过内部液压和轴向力的合理匹配，使最大膨胀量达到70%的预成形件；

The preforming process of 840 railway wheel was simulated by using commercial software MSC / Super Form . The distribution of the total equivalent strain and the metal flow track were analyzed .

利用MSC/SuperForm商用有限元软件对840车轮预成形过程进行了模拟分析，得出840车轮预成形过程的等效应变分布及金属流动轨迹。

The images of Dave Jackson , 32 , preforming the difficult move , which is part of the calisthenics regime currently sweeping the USA , have gone viral .

图片中的戴夫·杰克逊32岁，正做着属于软体操训练的一个高难度动作。这一风潮现在正席卷美国，并且迅速蹿红。

Based on the simulating results a preforming die and a final forming die with proper structures and longer life have been designed , with which forging parts with dimension precision and mechanics property improved have been produced .

基于模拟分析的结果，设计出结构合理、寿命较长的预成形及终成形模具，生产出的锻件尺寸精度和力学性能都有较大的提高。

For internal high pressure forming of a hollow part with big difference on section perimeter , the problems of axial feeding and preforming are necessary to be solved to produce qualified parts with more uniform thickness distribution .

截面周长差较大的空心零件的内高压成形需要解决膨胀区的轴向补料问题和预成形问题，才能获得壁厚分布较为均匀的合格零件。

In this research , the method of compression moulding flax reinforced low melt point PET ( LMPET ) composite and the properties of composites are studied . The preforming is in the form of nonwovens .

本课题研究的主要内容是模压方法加工亚麻纤维增强低熔点涤纶（LMPET）复合材料，预成型件为亚麻/LMPET混合非织造布，并且测试、分析了的复合材料的各项性能。

The result shows that when the acrylic adhesive agent content is 3 % of the fibre agent content , the adhesive agent has good mutual solubility with matrix resin , which can make the RTM preforming process satisfactory .

结果表明；丙烯酸型粘合剂用量为纤维用量的3%时，与不同的基体树脂有较好的相容性，从而使RTM预成型工艺取得满意效果。

The cross sections of the part are mainly hollow rectangular sections with big different dimensions at different positions of the part axis , so that it is necessary to be manufactured through preforming and final forming processes with a tube blank .

样件横截面主要为矩形空心截面，且沿轴线截面形状尺寸变化很大，因此需要采用管材通过预成形和终成形两个工序来完成。

This thesis will take up implementing character education ways and method in the secondary Chinese Teaching with particularity that is different from teaching in senior middle school so that we will give a good experience for reference for preforming on Chinese Teaching of secondary technical school .

本文从中专语文学科的教学出发，针对其不同于高中教育的特殊性，论述了以能力为本位，实施语文素质教育的途径和方法，以期为中专的语文教学改革提供有益的借鉴。

The technological process of new die forging for locking jaw of adjustable wrench was introduced , technology and die construction design of compression forming preforming and flashless precision die forging was explained , and technical economic benefit of new and old technology was compared .

介绍了活扳手扳口新的模锻工艺流程，阐述了镦粗&成形制坯工艺，闭式精密模锻工艺及模具结构设计，比较了新旧工艺的技术经济效益。

This paper introduces a process design of motorcycle connecting rod forging assembly line which consists of induction heating , cross wedge rolling preforming and friction press die forging . The paper also includes the process analyses , the equipment comparision and choice , and the application .

介绍了一条感应加热、楔横轧制坯、摩擦压力机模锻的摩托车连杆锻造生产线的工艺设计，包括工艺方案的分析确定与设备的比较选择以及实际使用情况。

The laying quality of wire rope can be improved by means of controlling the diameter of rope core , lay length ratio of all lay strands , parameters of preforming and postforming , adjusting the structure of wire rope in the course of practice production .

在实际生产过程中，通过控制绳芯直径、各层绳股的捻距配比、预变形和后变形等工艺参数以及调整钢丝绳结构等方法提高钢丝绳的捻制质量。

Effect on the microstructure and mechanical properties of 8091 Al-Li alloy is researched with the high temperature forging-quenching technology , and the structure and property comparisons are made among the above technology and the foetal die forging as well as foetal die forging-cold pressing preforming technology .

探索了高温锻造淬火工艺对8091铝锂合金组织与性能的影响，并与胎模锻造以及胎模锻造加模压预变形工艺做了对比。

The present status of the application of large blades of steam turbine , the character-istics of blades , key points of die forging and technical solution of manufacturing are analyzed . The preforming , design of forming die and gists of die forging of large blades are introduced .

分析了汽轮机大叶片应用现状、叶片特点、模锻成形关键点及其制造工艺方案，介绍了制坯工艺、成形模具设计以及大叶片模锻工艺要点。