1) formation of composite joint
焊缝形成过程
1.
The microstructure of brazed metal is analyzed with scanning electron microscopes and EDAX,the regular effect of ultrasonic acting time on microstructure and shear strength of brazed metal is studied,and the illustration of the formation of composite joint under the ultrasonic vibration is established.
通过扫描电镜、能谱等方法对焊缝的微观结构进行了描述,研究了超声波作用时间对焊接接头微观组织结构及连接强度的影响规律,建立了超声波作用下复合焊缝形成过程的物理模型。
2) appearance of weld
焊缝成形
1.
Effects of transverse rotating magnetic field on appearance of weld in tungsten inert-gas arc welding;
横向旋转磁场对TIG焊焊缝成形的影响
2.
Compared with the laser welding, laser-plasma arc hybrid welding can increase welding speed and tolerance towards poor joint fitup, reduce porosity as well as hot cracks and improve the appearance of weld.
已发表的研究文献表明,与单独激光焊相比,此技术可显著提高焊接速度和间隙适应能力,有效地减少气孔和热裂纹,改善焊缝成形质量,可应用于剪裁拼板焊、涂层钢的搭接焊、填丝焊、薄板高速焊及表面合金化,适合于低碳钢、不锈钢及铝合金等材料,且能用于立焊。
3.
It was found that only when the gap was much smaller than the weld width of traditional TIG welding and A-TIG welding, flux gap have more effect on the appearance of weld.
进行了SiO2、TiO2、CaF2以及自行研制的AF305多组元活性剂铝合金FBTIG焊接试验,研究了间隙和活性剂对FBTIG焊缝成形的影响。
3) weld formation
焊缝成形
1.
Twin-electrode TIG welding procedure and mechanism of weld formation;
双钨极氩弧焊工艺及焊缝成形机理分析
2.
Automatic extraction of weld formation parameters by back CCD visual sensor;
背面CCD视觉传感焊缝成形参数的自动提取
3.
Numerical simulation on weld formation of twin-electrode GTAW welding;
双钨极氩弧焊焊缝成形的数值模拟
4) weld shaping
焊缝成形
1.
Effect of energy parameters on weld shaping for hybrid laser/plasma welding of titanium alloy;
激光/等离子电弧复合热源能量参数对钛合金焊缝成形的影响
2.
Analyzing the effect of welding process factors on weld shaping;
焊接工艺因素对焊缝成形影响的分析
3.
Effect of preheating temperature on weld shaping and microstructure for laser lap welding of aluminum alloy;
预热温度对铝合金搭接激光焊焊缝成形及组织的影响
5) weld shape
焊缝成形
1.
Effects of welding parameters on weld shape of laser-MIG hybrid welding of AZ31 magnesium alloy
工艺参数对AZ31镁合金激光-MIG复合焊缝成形的影响
2.
The effects of welding speed, defocusing distance, laser power, shielding gas, activating flux and activating elements on weld shape in YAG laser welding of SUS304 stainless steel was studied.
以不锈钢SUS304作为试验对象,分别研究了焊接速度、散焦离焦量、激光功率和保护气体等工艺参数以及活性剂和活性元素硫对不锈钢YAG激光焊焊缝成形的影响。
3.
The effect of welding parameters on the weld shape and weld miscrostructures were studied by butt-welding of TiNi alloy thin sheet using pulse laser.
2mm厚TiNi合金薄片脉冲激光对接焊时易出现烧穿;激光峰值功率、脉冲宽度以及脉冲频率对焊缝成形有较大的影响,焊缝熔深和熔宽随着这三个参数的增大而增加。
6) weld appearance
焊缝成形
1.
In order to study the mechanism of double wire welding,the droplet transfer of double wire pulsed MIG welding is observed by high-speed photography and electric signals,and the welding efficiency and weld appearance of single wire pulsed MIG welding and double wire pulsed MIG welding with different welding parameters were analysed and compared.
为了研究双丝焊焊接效果的影响机理,利用高速摄像和电信号结合的方法,观察了双丝脉冲M IG焊的熔滴过渡,研究了熔滴过渡的特点;针对双丝M IG焊高熔敷效率的特点,对不同焊接参数下单丝焊和双丝脉冲M IG焊的熔敷速度和焊缝成形进行了对比分析。
补充资料:主要射出成形材料成形时应注意事项
■主要射出成形材料成形时应注意事项
品 名 注 意 事 项
PVC
聚氯乙烯
1. 产品种类范围非常广(硬质、软质、聚合物等),成型条件各有不同,从熔融至分
解之温度范围很小,尤须注意加热温度。
2. 附着水分少,但成型周期尽可能减少(50℃~60℃热风干燥)。
3. 成型机方面,与材料直接接触的部位须电镀或采用不锈钢以防热分解所产生的盐酸
侵蚀。射出压力2100kg/cm2程度。
4. 所有塑料当中必须是细心注意温度调节。
5. 浇口附近易产生流纹,故射出操作后,柱塞不要后退使浇口充分固化后再瞬间退后为宜。
6. 加热之初温不宜高,特别注意熔融情形。第二级加热温度较高,且尽可能使成形周
期缩短,比较安全。
PA
聚醯胺树脂
1. 成型温度比其它材料高,故采用油加热的成形机较适当。
2. 吸湿性大,必须充分干燥。水分对成型品的品质影响甚大(80℃热风干燥约5~6小时)。
3. 须退火以消除内部歪斜。
PP
聚丙烯
1. 同PE,但成形温度必须较高。熔融温度170℃,超过190℃则流动性大增,则毛边增加,
易产生接缝及凹入情形。
PC
聚碳酸脂
1. 吸湿性比尼龙小,但若有些微之水分存在则成型品产生其它色泽或气泡,故必须密封
干燥同时成形时也须预备干燥(120℃之温度4小时)。
2. 加热温度超过320℃时则产生热分解,成品变色,故特别注意温度调节,又成型时的温度调节也非常重要,须特别注意其最低温度、最低时间。
3. 须退火以消除内部歪斜(130℃~135℃,1小时程度为准)。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条