DRILLING METHOD FOR PCBS WITH HIGH HOLE POSITION PRECISION

摘要

Disclosed is a drilling method for PCBs with high hole position precision, comprising: step 1 of fixing a PCB on a workbench; step 2 of pre-drilling a to-be-drilled portion of the PCB by using a short-blade drilling tool; and step 3 of deeply drilling the to-be-drilled portion which has been machined in step 2 by using a long-blade drilling tool. The PCB is fixed in step 1 to prevent the PCB from moving during drilling which otherwise would affect the drilling precision; the to-be-drilled portion of the PCB is pre-drilled by using a short-blade drilling tool in step 2, and the short-blade drilling tool has a higher rigidity than a long-blade drilling tool and thus will not easily slide at the moment of contacting the surface of the PCB; and the to-be-drilled portion which has been machined in step 2 is deep drilled by using the long-blade drilling tool in step 3, and the long-blade drilling tool has reduced sliding upon entry, thus guaranteeing the entry alignment of the long-blade drilling tool in the case of deep drilling, so that the drilled hole meets the requirement of high hole position precision for PCBs.