Micro-pore drilling device for flexible printed circuit board and processing method thereof

Abstract

The invention discloses a micro-pore drilling device for a flexible printed circuit board and a processing method thereof. The micro-pore drilling device comprises a cover plate, a base plate and a cold air injection device, wherein a micro-drill is arranged on a spindle, the base plate is fixed on a machine tool workbench and located below the micro-drill, the flexible printed circuit board is arranged on the base plate, the cover plate is arranged at the top of the flexible printed circuit board, the cold air injection device injects cold air to the flexible printed circuit board to maintain the freezing temperature of the flexible printed circuit board, the injection device is connected with an air source through a flow rate valve, temperature measuring equipment detects the temperature when the micro-drill drills out, the signal output end of the temperature measuring equipment is connected with the signal input end of a control device, the signal output end of the control device is connected with the flow rate valve, and the air output of the cold air injection device is regulated according to the real-time temperature. The micro-pore drilling device for the flexible printed circuit board is capable of effectively lowering the drilling temperature, effectively avoiding the drilling dirt in the hole and improving the drilling quality, simple in structure, convenient to use and practical. The processing method is convenient to operate and low in production cost.

Description

technical field [0001] The invention relates to a microhole drilling device for a flexible printed circuit board and a processing method thereof, and belongs to the innovative technology of the microhole drilling device for a flexible printed circuit board and a processing method thereof. Background technique [0002] When performing micro-hole drilling on a Flexible Printed Circuit Board (FPCB), during the micro-hole drilling process, usually because the drilling chips are not discharged out of the hole in time, they will remain in the hole, and due to the The high temperature causes the drilling cuttings to adhere to the hole wall, resulting in drilling contamination in the hole. The drilling temperature of micro-drilling is usually formed by the accumulation of heat generated during the drilling process. As the market's technical requirements for flexible printed circuit board products are getting higher and higher, the number of layers of flexible printed circuit boards...

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional micro-hole processing method will cause serious drilling contamination in the hole. According to research, the thicker the plate, the smaller the hole diameter, and the more drilling chips will be left, which will form fatal defects such as plug holes and open circuits in the hole; and The removal of drilling dirt is a relatively complicated process in actual production

In order to improve this phenomenon, in the existing technology, cooling liquid or cooling solid is used to continuously cool the processing part at the processing site. The freezing liquid used is liquid nitrogen, etc., which are relatively expensive and have high production costs, and are difficult to be adopted by manufacturers. accept

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