PCB News - Talking about the V-cut technique of the circuit board and the remedy of too deep V-cut

Talking about the V-cut technique of the circuit board and the remedy of too deep V-cut

I have talked about so much knowledge about related circuit boards. I don’t know how you know and how much you have absorbed. As a manufacturer of high-precision double-sided/multilayer circuit boards, Shenzhen circuit board manufacturers will now tell you a new point of knowledge. I hope everyone can master it!

The so-called (V-cut) means that the printed circuit board(PCB board) manufacturer cuts the dividing lines in a specific position of the PCB board with a rotary cutter in advance according to the customer's drawing requirements. The purpose is to facilitate the subsequent SMT circuit board assembly. "De-panel" is used because its cut shape looks like an English (V) shape, hence the name.

Circuit board V-cut (V-Cut) is a process that divides the semi-finished circuit board into a process that facilitates subsequent processing. The process is to divide the semi-finished product with several units on the working board, just like opening the entire board of stamps to facilitate tearing off and opening the stamp hole. Of course, the circuit board also has stamp holes, but it is more for V-cutting, which is to grind a V-shaped groove on the circuit board with the grinding wheel of a V-cutting machine. Before V-cutting, you must carefully check the slotting distance. The error must not be large. Exceeding a certain level will cause the size of a single circuit board unit to be large or small. The V-groove on the edge of the positioning orifice is generally larger than the depth between the units, so that the components are difficult to break after welding, and they are easy to disperse if they are too deep. Therefore, the V-cut depth control is a difficult point. The V-cut depth of different plates is different. different.

Generally, the production of bare circuit boards will first do the panelization and break-away operations, so when the circuit board is printed (pasted) all the parts and the assembly is completed, it is of course necessary to carry out "dividing". Only when the board is installed in the machine can the board be installed in the machine, because usually the whole product does not install more than two identical assembly boards (PCBA).

The circuit board v is too deep and cannot be remedied by means of rework or repair, but it can be started from the SMT end to make the PCB as usable as possible. Because the V-cut is too deep, the number of connected materials is reduced, and it is easy to deform or even break the PCB board when exposed to high temperatures. At this time, you can make a mold to fix the PCB, for example, put the PCB on the barbed wire in China for reflow soldering, so that the PCB is supported and will not break. The PCB can be mounted normally, so there is no loss.

These are some basics, not too deep. If you need to understand more in detail, you are welcome to come to the circuit board factory for understanding, or you can call for consultation.

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