Electrochemical Curved Hole Machining with Electrode Posture Control System

Sasahara, Hiroyuki; Nagao, Shohei; Chino, Masahisa

doi:10.1299/kikaic.73.2619

Cited by 2 publications

(1 citation statement)

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“…For example, electrical discharge machining has been used to drill curved holes by attaching an electrode to the tip of a universal joint or self-moving electrode [1]. An electrochemical machining technique was tested by placing an electrode on the tip of a flexible tube [2]. Laser drilling has been performed by emitting a laser beam and liquid jet from the tip of a thin curved tube [3].Optical fiber has also been used to transmit laser light to the bottom of a curved hole [4,5].…”

Section: Introductionmentioning

confidence: 99%

Curved drilling via inner hole laser reflection

Hidai

Kuroki

Matsusaka

et al. 2016

Precision Engineering

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In this paper, we describe curved hole drilling via the reflection of a laser beam off the sidewall of the drilled hole. A slightly offset laser beam forms a tilted surface at the bottom of the hole, controlling the angle of curvature. An ultraviolet laser beam operating at a wavelength of 266 nm was used. To visualize the hole formation process, borosilicate glass was used as the laser workpiece. This method was able to drill a curved hole with an average angle of ~3° with curvature beginning at a depth of 400-600 µm. A curved hole with a diameter of < 50 µm was achieved. A branched hole was also demonstrated by using the reflection of the tilted sidewall. The curved hole formation process was recorded with a high speed camera. Once the ablated sidewall reached a certain depth, drilling ceased as the laser energy fell below the ablation threshold. Ultimately, judicious selection of an appropriate laser fluence and sidewall angle allow the formation of curved holes.

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Section: Introductionmentioning

confidence: 99%