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Basic function of the liquid surface evolving analysis software: Surface Evolver is introduced, and its basic modeling way of 3-D surface demonstrated.

第三章以无引脚SMC焊点形态为例,对SMT焊点形态数学模型建模和成形预测方法问题展开了分析比较研究。

in the paper, solder joint shape is predicted through inputting data files to surface evolver software. then the flip-chip solder joints shape can be formed by the software.

本文通过用于焊点形态预测软件surface evolver的输入数据文件,得到倒装焊焊点形态。

In this paper,minimal energy principle and finite element method were employed to develop solder joint shapes evolving model of PBGA.

焊点形态和力学行为进行研究可以揭示它们之间的相互关系,达到预测和控制焊点形态并对其进行优化设计的目的。

Results from dimension optimizing of soldered joints show that the stress will decrease monotonously with the height of the soldered joint.

焊点优化结果显示,焊点高度对应的应力值曲线具有明显的单调递减特性。

Results indicate that the maximum stress concentrates on the top surface of the outmost corner of the soldered joint where the potential initial crack may appear.

研究发现,元器件整体的最大应力集中在阵列最拐角焊点的上表面上,该部位可能成为焊点裂纹的发源地。

The optimization design of solder ball is important content of the reliability research on it.

焊点的优化设计是焊点可靠性研究的重要内容。

Seal weld is similar to spot weld, so it can be simulated by the connection of somespot welds.

缝焊类似点焊,它是由焊点前后搭接形成的,因此,焊缝模拟同样是通过多个焊点连接而成的。

It is possible that shunt currents flowing through a previously made spot weld will take welding current away from the second second spot weld to be made.

有可能通过前一个完成焊点的分路电流将使电流远离将要操作的第二个焊点

But the conveying chain wheel with smaller radius allows smooth transportation of small PCB.

无铅焊点冷却时,不具有象铅锡合金一样的固液共晶点,而是一个温度区间,运输过程中产生的震荡会影响焊点的良好结晶,半径较小的运输传动链轮使得小型 PCB 平稳传送,无振荡。

One side of the weld should pull loose from the parent metal with a metal extension from the weld. Check for proper weld diameter.

从焊件母材金属上拉下来的含有焊点的那一边可以用来检查焊点的直径。

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在美国,慢性酒精中毒,肝炎是最常见的。

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如果有任何问题,你可以随时联系我。

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