Drill bit wear monitoring method

Abstract

The present invention belongs to the drill bit detection technical field and discloses a drill bit wear monitoring method. The method includes the following steps that: S1, a plurality of monitoring points are set at the intervals of the life span of the number of times of rotation of a drill bit; S2, when the rotation of the drill bit achieves the number of times of rotation of the monitoring points, the use of the drill bit is stopped; S3, point-cloud scanning is performed on the drill bit at the monitoring points through using a three-dimensional laser scanner, so that the three-dimensionalcloud data of the drill bit can be acquired; S4, the three-dimensional model of the drill bit at the monitoring points is built through modeling software according to the three-dimensional point cloud data of the drill bit; S5, the three-dimensional model of the drill bit at the monitoring points is compared with the three-dimensional model of a standard drill bit; S6, whether the wear of the drill bit at the monitoring points is within an allowable error range is judged, when the wear of the drill bit exceeds the allowable error range, the drill bit is ground or scrapped; and S7, after the drill bit is ground, S3 to S6 are executed. The drill bit wear monitoring method has high measurement accuracy and can detect some small defects, thereby improving the quality of the hole drilling of the drill bit.

Description

technical field [0001] The invention relates to the technical field of drill bit detection, in particular to a method for monitoring drill bit wear. Background technique [0002] Due to the sharp increase in the demand for printed circuit boards, the consumption of PCB micro-drills used in the printed circuit board manufacturing industry has also continued to increase accordingly. With the development of the electronics industry, printed circuit boards have developed from the original single-layer board to multi-layer board. , flexible circuit boards, packaging substrates and HDI boards (High Density Interconnects high-density inline boards). The micro-connection holes on the PCB usually have a diameter of 0.05-0.30mm. These micro-connection holes are divided into three types: blind holes, buried holes and through holes. In the production process of PCB boards, hole processing is a very important process. The quality of drilling directly affects the final quality of PCB boa...

AI Technical Summary

Problems solved by technology

[0003] Therefore, the wear monitoring of the micro-drill is very important. However, in the prior art, a set of infrared light transceiver device connected with the computer control system is generally used to detect the wear and damage of the micro-drill blade, and the drill is placed in the optical path to form three Point a line, if the blade of the drill bit is intact, the light emitted by the transmitter will be blocked, and the receiver cannot collect the optical signal; if the blade of the drill is damaged, the receiver can collect the light emitted by the transmitter and convert it into an optical signal , the optical signal is converted into an electrical signal by the signal processing circuit, which can send a drill bit damage signal to the control system to stop the processing equipment

[0004] The size of the blade is measured by infrared rays or photographs, the measurement accuracy is not high, and some small defects cannot be detected

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