Circuit board, processing method of circuit board and processing method of counterbore

Abstract

The invention provides a circuit board, a processing method of the circuit board and a processing method of a counterbore. The machining method of the counter bore comprises the steps that the theoretical depth Z of the counter bore is calculated according to the maximum diameter D of an orifice of the counter bore to be machined, wherein Z = the drilling plate depth of a machine minus D/2; setting a machining program of the counterbore according to the theoretical depth; the counter bores are drilled in the plate edge of the plate in a trial mode; the part, where the counterbore is tested to be drilled, of the plate is sliced, so that the actual machining depth of the counterbore is obtained; comparing the actual machining depth of the counterbore with the theoretical depth to obtain a depth deviation value of the counterbore; whether the depth deviation value of the counterbore is within a preset difference value range or not is judged; and if yes, the plate is machined. Compared with a traditional counterbore machining method, a parallel plate does not need to be drilled, the machining time of the counterbore is greatly saved, and the machining efficiency of the counterbore is improved.

Description

technical field [0001] The invention relates to the technical field of circuit board manufacturing, in particular to a circuit board, a processing method of the circuit board and a processing method of a counterbore. Background technique [0002] In the field of machinery, it is common for boards to be designed with countersunk holes, such as the countersunk hole structure of circuit boards. The traditional processing method of the countersunk hole of the circuit board is as follows: first, fix it on the platen with a backing plate; [0003] However, the depth of the counterbore and the diameter of the hole of the traditional circuit board processed by the above-mentioned processing method have large deviations, and the scrap rate of the circuit board is relatively high due to the difficulty of quality control and subsequent rework; In addition, it takes more time to drill parallel plates. For example, when drilling a 21.5mm*24.5mm parallel plate, it takes more than 6 hours...

AI Technical Summary

Problems solved by technology

[0003]However, the depth and diameter of the counterbore of the traditional circuit board processed by the above-mentioned processing method have large deviations, and the quality control is more difficult. High and difficult to rework later, so that the scrap rate of circuit boards is high; in addition, it takes more time to drill parallel boards. For example, when drilling a 21.5mm*24.5mm parallel board, it takes more than 6 hours of processing time

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