铸件

Precision casting weight ranges from 8g to dozens of kilograms and sand casting weight ranges from 0.5kg to 500kg.

目前生产品种近万种，精铸件重量由8克至几十公斤砂铸件由0.5公斤至500公斤。

The biggest characteristics in this paper is using independent quantitative range analysis and variance analysis of orthogonal experiment to analyze die casting defects, base on these analysis, detect the weight of each process parameter to die casting defects, then synthetically think over the influence of whole casting quality by the weight of every die casting defect, to balance and choose the level of casting process parameter for seeking the whole quality optimization of casting.

本文最大的特点是将各压铸缺陷进行独立量化的正交实验极差分析和方差分析，通过这些分析可知各工艺参数对此铸造缺陷的影响权重，然后综合考虑各铸造缺陷对轮毂铸件整体质量的影响权重，权衡和舍取工艺参数的水平，以达到铸件整体质量的最优化。

However,in the past-developed software-package about foundry technique,the calculation methods of casting weight and module were not very correct and the weights of many complex castings were calculated not through the theory calculation,but through the experience of foundry men.

但在以往所开发的软件中，铸件的模数和重量计算不系统化、规模化、专业化，对于一些复杂的铸件而言，这些参数不易准确地求出；冒口的设计系统大多凭经验得出，很少上升到理论的高度来准确地设计，而且冒口的准确程度不易用数值模拟计算来进行检验等。

Distinguished from the Cu content which have the optimal effect on cast strength is 5% with the chill casting, the Cu content that have the optimum effect on cast is 8% in the squeeze casting, furthermore, its strength effect is much better. The vacancy consistency of casts is raised in the squeeze casting which makes speed the diffuse velocity of atom and heat treatment process.

比压还增加了铜在铝基体中的溶解度，和金属型铸造时铜对铸件的最大强化作用发生在含量为5%时不同，挤压铸造时铜对铸件强化最大的含量为8%，强化效果较金属型铸造时更佳。

The results show that new residual stress is about 6MPa under air-cooled normalizing; due to chilling effect of surface quenching, the temperature differences between coarse bar and thin bar in stress frame, and between surface and core of the coarse bar are tremendous; in quenching process, the stress of the certain areas in the coarse bar is maximum at 2s, more than 420MPa, the stress frame casting has the bigger possibilities of fracture.

结果表明，正火空冷时新产生的残余热应力约6MPa；淬火时由于表面激冷作用，应力框在粗细杆间及粗杆的表面和芯部都有巨大温差；铸件在淬火的过程中，粗杆的某些部位在2s时等效应力达到最大，超过了420MPa，极有可能导致铸件断裂。

Anodization is the important process of surface pretreatment for Al-alloy casting and the anodising membrane chromatism of aluminium alloy casting directly influenced the surface quality , service life and appearance .

阳极氧化成为铝合金铸件表面处理的一种重要方式，而阳极氧化膜色差直接影响到铸件的表面质量，使用寿命及外观要求。

When setting this home position, the slide cylinder should not be in the deadheaded area of the cylinder -it deadheads approximately 0.25 inch from the absolute maximum distance the cylinder can move.

为了设置初始位置，滑走导向圆柱部不能处于筒体铸件冒口位置—离铸件冒口的绝对极大值是大约0.25英寸，并能使筒体活动。

Through the comparison of the testing result of bolster and side frame, molding process without sand flask and with sand flask, as well as the comparison and analysis of casting defects, eventually, we found that the produc-tion of qualified casts was mainly affected by the maternal, technology and exogenous factors of resin bonded sand.

本文通过对摇枕、侧架无箱造型工艺和有箱造型工艺试验结果的对比，以及通过对铸件产生缺陷情况的对比和分析，最终确定合格铸件的生产，主要受树脂砂的原材料、工艺和外部因素综合影响。

Friction discs, brake clamp body, bracket, steering Stand Etc motorcar Fitting. Valve, valve body castings, hydraulic pressure jack castings, well cover and base component etc.

主要产品有：制动盘、制动钳体、支架、转向节等汽车配件，阀门、阀体铸件，液压千斤顶铸件和窨井盖等基础件。

Extensive research has been conducted to find ways of reducing such porosity; however, it is difficult if not impossible to eliminate completely, and die castings often are lower in strength than low-pressure or gravity-fed permanent mold castings, which are more sound in spite of slower cooling.

大量的研究工作旨在降低这一气孔率，可是实际上要想完全消除是相当困难的，并且压模铸造铸件的强度经常不及低压和重力铸造获得的铸件，尽管后两种方式的冷却速率教慢，但是其可靠性相对较高。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了