In the simulation, a 2-D model is established with special attention paid to the zinc coat, because it dramatically affects the nugget size.
该模拟过程对镀锌层的存在,特别是对接触电阻的影响给予了重视,建立了轴对称2-D模型,采用热、电耦合计算方法,输入不同焊接条件,得到最终的温度场分布图,并算出熔核直径。
The correlations of nugget size-to-amplitude-frequency correspondence were analyzed,the results show that the amplitude-frequency values of harmonic wave are direct proportional to the nugget sizes linearly.
通过对分流条件下,钛合金点焊焊接电流波形进行快速傅立叶变换(FFT),获得了焊接电流波形的幅频图,并将熔核直径与对应的幅频值进行对比分析,发现电流谐波幅值与熔核直径近似成线性正比关系。
Meanwhile,combining facts of spot-welding nugget diameter changing with welding current and zinc residue in fusion zone by SEM spectrum analysis,main reasons that affect the strength of spot-welding joint of hot galvanized steel are analyzed.
结果表明:当其他焊接参数一定时,DP590GA与DP590点焊接头强度和熔核尺寸随着焊接电流的变化趋势在焊接电流各个阶段有所不同,而熔核区的残留锌量随焊接电流的减小而增加,从而揭示了锌层使点焊区域接触电阻降低和焊接电流密度减小引起的熔核直径减小、熔合区残留锌量增加以及锌层更易引起点焊飞溅三个因素在不同的焊接电流范围内对点焊接头强度的影响作用。
It was shown that the growth of pitting increased real contact area between parts,which decreased current density and reduced nugget diameter.
结果表明,点蚀的产生与发展增加了工件之间的实际接触面积,使电流密度降低,熔核直径减小;同边缘位置点蚀相比,电极中心位置点蚀由于对熔核区域的电流分流作用,更加不利于熔核的形成。
The nugget size forecasting model was built based on Bp algorithm of artificial neural network.
从电极位移曲线上提取出的两个特征值及焊接能量值作为输入值,熔核直径为输出值,建立了基于BP算法的铝合金直流点焊熔核直径预测模型。
The optimum design on melting zone diameter of cupolas;
冲天炉熔化带直径的优化设计
Relationship Between DRC and Nugget Diameter of High Temperature Alloy in Spot Welding
高温合金点焊动态电阻曲线与熔核直径的关系
Relationship between DRC and nugget diameter of stainless steel in resistance spot welding
不锈钢点焊动态电阻曲线与熔核直径的关系
The fibre diameter increases with increasing fluidity of the molten oxide.
熔融氧化物的流化度增大，纤维直径增大。
For the nuclear diameter we have used 18fm.
我们用18fm作为原子核的直径。
An elect ron is about as large as a nucleus , it sdiameter being about 10 - 12 cm.
电子大约与原子核一样大,直径约为10-12厘米。
fused quartz outer diameter controller
熔融石英外径控制器
The influnce mechanism of power supply rule-electrode diameter,slag system and steel grade on surface quality of ESR ingot has been analysed theortically.
理论分析了供电制度、电极直径、渣系和钢种对电渣重熔钢锭表面质量的影响机理。
Europa must have a molten core
其核心部分必定是熔岩，
And the rocks melt w' the sun!
直到烈阳将岩石熔化，
Of, relating to, or along a diameter.
直径的直径的，与直径有关的，或沿直径的
A DIA PISTON DIAMETER
A DIA 活塞直径
related to or along a diameter.
属于直径，与直径有关，或沿直径。
The diameter of the nucleus, if we think of it as roughly spherical, is of the order of 10-14m.
如把原子核粗略地看作球形，则它的直径的数量级为10－14m。
The core is located in the inner most of the earth and has a diameter of sixty-nine hundred kilometers. Iron and nickel are probably its main composition.
位于地球最内的核部的直径有6900公里，它的主要成分可能是铁和镍。
Thin, tangled fibers, about 3 to 5 nm in diameter, traverse the clear nuclear area.
直径约30－50埃的细小盘曲的纤维横贯透明的核区。
Resistance spot welding in aluminum alloy was tested by ultrasonic immersion method with focusing probe.
介绍采用水浸超声聚焦回波检测铝合金电阻点焊焊核直径。
Magnet Design of NMR Analyzer for Core of Whole Diameter and Application in Oilfield;
核磁共振全直径岩心分析仪磁体研制技术与油田现场的应用
On Hurdles and Long-jumping s Checking Standard of the Common Requried Athletics in PE Specialty;
体育教育专业田径普修课直道跨栏和跳远考核标准探讨
