Circuit Board to Board Edge Board Cutting Board: Stamp Hole Design

一般电路板的分板设计会使用V型刻线机（划线）或切割成型机（布线）。其实除了这两种设计之外，还有一种邮票孔设计方法。
之所以叫“邮票孔”，是因为这种设计真的和我们一般看到的全邮票一样。在隔板的位置打一些小孔，方便用钳子等工具进行隔板，或者直接用手折断小孔之间的连接筋，达到分板的目的。
“邮票孔”拆分的最大优点是不需要任何特殊的拆分工具即可达到拆分的目的，不像其他两种方法需要专用的Scoring machine和routing machine。但是，这个邮票孔确实有很多缺点。以下是缺点：

邮票孔分割后，容易留下毛刺和板边不平整。这些毛刺有时会在装配中造成麻烦。例如，有显示器的地方不应有毛刺等易沾污物。这些凹凸不平的板边有时会导致装配干扰甚至功能问题。
邮票孔通常不使用常规的板分离工具。如果施力不当，很容易将电路板弯曲，导致电路板上的焊锡出现裂纹，或者零件出现裂纹……等质量问题。
由于邮票开孔工具的不确定性，制造工艺不稳定，质量难以控制。
这种邮票孔通常设计用于一些不能使用V-cut作为子板的电路板上，因为V-cut在使用上有一定的局限性。如果切板的设计不好，就会造成不能承受重量的变形问题。所以说完，我们还是要回到邮票孔的设计上去，邮票孔的设计也是一些大学问的。如果设计不好，不仅容易产生毛刺，影响装配，有时还需要额外加工，费时费力。又是不愉快。

The following are two different stamp hole designs. Have you noticed the difference? The same is the design of 5 small stamp holes with a diameter of 1.0mm, but the result is very different. The bad stamp hole design causes residues after the PCB is divided. The burrs protrude beyond the molding line. For precision products, most of these burrs require extra manpower to be processed and smoothed, which not only wastes manpower, but also wastes man-hours, increases costs, and may contaminate the powder during grinding. other products.
The difference between the two stamp hole designs is basically only in the design position of the rib. The better stamp hole design has the edge of the rib just in the middle of the stamp holes on the two sides, so that the stamp holes on the two sides are pre-formed broken In this way, it is not only easier to break the edge of the board, but also less burrs beyond the forming line after the edge of the board is broken.
Poorly designed circuit board [stamp hole]
The stamp hole design is not good, and the protruding point burrs after the plate are separated out of the forming line, which requires manual post-processing and smoothing. (The photo on the left appears to be a three-hole stamp hole design, but the result is the same)
印章孔设计不好，分版后突出点毛刺，毛刺超出成型线，需要人工进行后处理和修光，既浪费人力，又浪费工时，增加成本. 螺纹需要人工进行后处理和修光，不仅浪费人力，而且浪费工时，增加成本，而且磨削时的切屑还可能污染其他产品。
Better Design 电路板【印章孔】
印章孔设计较好，虽然分板后有毛刺，但一般可以在成型线内将所有毛刺整平，以免造成装配干扰。