Controlling of Diameter and Taper in Ultrafast Laser Helical Drilling

Zhanwen, 阿占文 A; Lingling, 陈灵灵 Chen; Ying, 吴影 Wu; Rongbao, 杜荣葆 Du; Hailin, 白海林 Bai; Guisheng, 邹贵生 Zou

doi:10.3788/cjl202148.0802017

Cited by 4 publications

(1 citation statement)

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“…For straight-hole processing, conventional processing technologies include micro-drilling, micro-milling, and stamp-forming [1] [2]. Regarding tapered hole processing, the common processing technologies include electroforming, electrical discharge machining, etching, and laser [3][4] [5].…”

Section: Introductionmentioning

confidence: 99%

Applying Stamping Without Die to Micro-hole Array Processing

Hung¹,

Hsu²

2023

Preprint

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Aluminum alloy (Al6061) sheet micro-hole processing is extensively used in smartphones, tablet PC, and smart wearable devices. The micro-hole processing is commonly performed using laser, micro drilling, microstamping, micro discharge, and chemical etching technologies. Micro-stamping technology is characterized by precision and rapid processing, but the precision positioning of the punch head and lower die is one of the major difficulties in micro-hole stamping, especially in manufacturing array micro-holes. This study used stamping without die technology. This technology uses an array punch head to punch the lower die holes on the base, then performs array micro-hole stamping. The experimental results show that a micro-hole array with 37 micro-holes were successfully manufactured and can be reproduced many times. Tapered array micro-holes with a high aspect ratio can be manufactured using this stamping without die technology; the micro-hole depth can be 260μm, the inlet diameter is 116μm, and the outlet diameter is 25μm. This study has successfully developed the feasibility of array micro-hole stamping technology.

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