Method for machining CAF-resistant circuit board through numerical control drilling machine based on CNC machining

Abstract

The invention discloses a method for machining a CAF-resistant circuit board through a numerical control drilling machine based on CNC machining. The method comprises the following steps: S1, making test data for simulation operation for hole deviation of dense holes; S2, setting the diameter of test drill holes to be 0.3 mm (11.811 mil) and the hole pitch to be 6.0-17.0 mil; S3, increasing an output parameter Cool spread to realize a bit jumping function; S4, changing the set value of the Cool spread to output different data so as to simulate and observe the change of the path of the dense holes on the main shaft of the numerical control drilling machine; S5, simulating and observing the change of the path of the dense holes on the main shaft of the numerical control drilling machine according to the test data in S1; and S6, obtaining a rule: for the dense holes with the diameter of 0.3 mm (11.811 mil), when the set value of the Cool spread is larger than the sum of the size of the holes and the hole pitch, bit jumping is conducted. According to the machining method, the distance between holes is increased, the positioning time of the drilling machine is prolonged, positioning ismore accurate, hole deviation in hole drilling of the dense holes and quality problems caused by the hole deviation are reduced, and production is smooth.

Description

technical field [0001] The invention relates to the technical field of CAF circuit board processing, in particular to a method for processing a CAF-resistant circuit board by a CNC drilling machine. Background technique [0002] In the PCB manufacturing industry, printed circuit board circuits are gradually developing towards ultra-fineness, and VIA holes are becoming more and more dense, resulting in the problem of hole deviation in dense holes, which has always plagued the normal production of drilling, and it is necessary to seek new dense hole drilling. The hole processing method makes the production smooth and the quality meets customer needs. [0003] The prior art solution is that when the numerical control drilling machine drills holes, it generally drills holes according to the shortest path, that is, the same knife first drills the hole with the closest distance from the starting point until the end. For boards with dense holes, sub-drilling is generally used, tha...

AI Technical Summary

Problems solved by technology

For boards with dense holes, because the distance from hole to hole is too close, the positioning time of CNC drilling machine is insufficient and the positioning is not accurate. At the same time, the drill needle will slip in the Z-axis direction, resulting in hole deviation.

[0004] There are still the following problems: 1. Manually divide dense holes into two drilling files, which is relatively random and prone to leakage; 2. Repeatedly calling data on the drilling machine is prone to errors

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