The Pocket Guide to Excellent V-Scoring
FAQ # 7 -- Jump Scoring "Break-Through"
Improving V-Score Specification for Ultimate Depanelization and End-Use Efficiency
Problem: In order to have a strong enough assembly panel, I must specify a web that makes the individual boards too difficult to depanel (flexing stress damage, carpal tunnel, etc…). Conversely, when we specify a web that is thin enough to make for comfortable depaneling, the panel is too flimsy for the assembly process. What can I do?
Solution: Jump-Scoring… There are two basic types of Jump-Scoring, Standard and Advanced.
1. Standard Jump-Scoring simply allows for a score line to jump over most of the panel border, leaving the border largely intact, and as a result, stronger and more rigid, resulting in a stiffer and stronger assembly panel. These Jump-Score lines can be cut much deeper then standard lines (to allow for easier board break-out) because the line itself is no longer required to be structural to the point of supporting the entire panel, only the individual board. Webs can be reduced to as thin as 0.008” to 0.010” when using Standard Jump-Scoring. When Jump-Scoring though, you must remember that at least two of the outside lines in the array (in either direction) must extend all the way through the border, to allow for a starting point for depaneling. See Fig 1. This will weaken the panel along the axis of these “fully” scored lines, reducing the overall usefulness of the process. This may be acceptable in many assembly operations that require panel rigidity mainly in one direction only. But, if the panel requires similar rigidity in both axes, Advanced Jump-Scoring (described in #2 below) can be used to provide both near-effortless breakout and rigidity of the panel in both axes.
2. Advanced Jump-Scoring provides both ease of breakout and rigidity of the panel in both axes, by adding ONE simple step to the Standard Jump-Scoring process. Instead of simply scoring all the way through the borders on the two outer lines in one axis (to allow a start point for depaneling), those two lines will be "Combo-Scored". See Fig. 2. Combo-Scored refers to the process of using a standard thick-web "full score for the each of the two outer lines, and then making a second jump-score pass, re-scoring each outer line at a deeper depth (thinner web). This technique allows for a starting point for depaneling (as above), but retains most of the border and therefore panel rigidity in that axis. Also, more importantly, using Combo-Scoring on the two outer lines in an axis also allows you to jump score even deeper than normal on all lines, providing for even easier and more efficient depaneling verses Standard Jump-Scoring alone. Webs can be jump-scored as thin as 0.004" to 0.006" for safe and easy depaneling, while maintaining a rigid assembly panel. The best of both worlds!!!
So, as you can see, V-Scoring continues to be a very adaptable and relevant process as requirements continue to change and add further demands on quality, cost and time to market. Contact AccuSystems Service or Sales for more information.