Manufacture method of short slotted hole for printed circuit board

Abstract

The invention discloses a manufacture method of a short slotted hole for a printed circuit board, aiming at solving the problems of size deviation and deformation when the short slotted hole is machined. The manufacture method comprises the following steps of: S1, carrying out sequential cutter arrangement on a slotted hole which needs to be manufactured by setting the length and the width of a slot in combination with a preset standard according to the shape of the slotted hole, and selecting a proper cutter according to the size of the slotted hole; S2, respectively setting subsidiary slots arranged at two sides of a pre-drilling slot for the designed slot width in a milling way, and setting an adding and amplifying size X on the basis of the normal compensation of a finished product along the length direction of the slot; S3, setting a compensation distinguishment of pre-drilled subsidiary holes arranged at two ends of the slotted hole, wherein a pre-drilling mouth selects a milling cutter of which the ratio groove width is less than or equal to 2X, and reserving the adding and amplifying size X at pre-drilling holes arranged at two ends of the slot from the edge of the slot; S4, carrying out compensating finishing on the whole slotted hole by the milling cutter of which the ratio groove width is less than or equal to 2X; and S5, thickly drilling by the milling cutter from one pre-drilling hole to another pre-drilling hole at a fixed displacement, so that the deformation quantity of the short slotted hole can be reduced.

Description

technical field [0001] The invention relates to the field of printed circuit boards (PCBs), in particular to a method for manufacturing short slots of printed circuit boards. Background technique [0002] The surface of the same printed circuit board is processed into various slots according to the information provided by the customer. The length of the slot is less than or equal to twice the width of the slot, commonly known as short slots. With the development of modern electronic products toward miniaturization, high integration, and high performance, the diameter of the drilled holes is getting smaller and smaller, the drilling accuracy is getting higher and higher, and there are more and more ultra-short slots and long slots. Customers have higher and higher requirements for the processing quality of slot holes, and its quality directly affects the installation and use of customers' products. [0003] In the production process of the existing short slot hole, due to th...

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is that the size deviation and deformation problems are easy to occur in the process of making short slot holes

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