How to solve the problems occurred in the drilling process of the PCB factory

Drilling is very important in the PCB factory production process. The drilling is to drill the required via holes on the copper clad plate to provide electrical connections and fix devices. If there is a problem in the via process, the device cannot be fixed on the circuit board, which will affect the use at light level, and the entire board will be unusable at worst. Therefore, drilling is very important.

So, what are the common problems in the drilling process? Let me introduce to you.

1. Circuit board broken drill nozzle

cause:

1. The drill tip is not suitable, the operation is improper, the rotation speed of the drill bit is insufficient, and the feed rate is too high.

2. When drilling, the depth of the main shaft is too deep, resulting in poor chip removal from the drill nozzle and strangulation.

3. The drill bit has been ground too many times, or has been used for an extended period of time.

4. When fixing the base plate, the tape is too wide or the aluminum sheet of the cover plate or the plate is too small.

Solution:

1. Detect the change of the spindle speed and the stability of the spindle, whether there is copper wire affecting the uniformity of the speed, and carry out corresponding maintenance or replacement.

2. Check whether the pressure foot gas pipeline is blocked, adjust the state between the pressure foot and the drill bit, the tip of the drill tip should not be exposed, and check the pressure data when the pressure foot is pressed.

3. Check the geometry, wear and tear of the drill bit and select the drill bit with the appropriate length of the chip extraction groove. Select the appropriate feed amount, reduce the feed rate, and reduce to the appropriate number of stacks.

4. Choose covers and pads with suitable surface hardness and flatness. Check the fixed state and width of the adhesive tape, replace the aluminum sheet of the cover, and check the size of the sheet.