• Title/Summary/Keyword: Glass machining

Search Result 159, Processing Time 0.029 seconds

Study of Optimal Machining Conditions of Ultrasonic Machining By Taguchi's Method (다구찌 방법을 이용한 초음파 가공의 최적가공조건에 관한 연구)

  • Liu, Jun Wei;Jin, Jian;Ko, Tae Jo;Baek, Dae Kyun
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.37 no.2
    • /
    • pp.213-218
    • /
    • 2013
  • Ultrasonic machining (USM) is a new method used in metal cutting. This process does not involve heating or any electrochemical effects, causes low surface damage, has small residual stress, and does not rely on the conductivity of the workpiece. These characteristics are suitable for the machining of brittle materials such as glass or ceramics. However, the use of USM for brittle materials generates cracks on the workpiece. Therefore, in this study, Taguchi's method was used to optimize the processing conditions of micro holes drilled in glass and ceramics. This method was used to successfully reduce the number of cracks at the entrance and the exit of the micro holes.

The property of WC(Co 0.5%) Ultra precision turning for Glass Lens molding (Glass Lens 성형용 초경합금(Co 0.5%)의 초정밀 절삭특성)

  • Kim, Min-Jae;Lee, Jun-Key;Kim, Tae-Kyoung;Hwang, Yeon;Kim, Hye-Jeong;Kim, Jeong-Ho
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • 2010.06a
    • /
    • pp.41-41
    • /
    • 2010
  • In this research, to study tungsten carbide alloy(Co 0.5%) ultra precision turning possibility that is used Glass Molding Press(GMP) using conventional (Rake angle $-25^{\circ}$) single crystal diamond bite observed machining surface condition, surface roughness($R_a$), diamond bite cutting edge after tungsten carbide alloy ultra precision turning. Suggested and designed optimum chamfer bite shape to suggest ultra precision optimum bite using Finite Element Analysis(FEM). After machining tungsten carbide alloy ultra precision turning using optimum chamfer bite and comparing with conventional bite machine result and studied optimum chamfer bite design inspection and also tungsten carbide ultra precision turning possibility for high temperature compression glass lens molding.

  • PDF

Predictive modeling of surface roughness and material removal In powder blasting of glass by design of experiments (파우더 블라스팅을 이용한 유리 가공시 실험계획법에 의한 가공면 분석)

  • Jin Quan-Qia;Kim J.K.;Han J.Y.;Seong E.J.;Park Dong-Sam;Yoo W.S.
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2005.10a
    • /
    • pp.681-684
    • /
    • 2005
  • The old technique of sandblasting which has been used for paint or scale removing, deburring, and glass decorating has recently been developed into a powder blasting technique for brittle materials, capable of producing micro structures larger than 100um. A large number of Investigations on the abrasive jet machining with output parameters as material removal rate, penetrate and surface finish have been carried out and reported by various authors. In this paper, we investigated the effect of surface characteristics and surface shape of the abrasive jet machined glass surface under different blasting parameter. and finally we established a model for abrasive flow machining process, and compared with experimental results.

  • PDF

Cutting Characteristics of Workpiece Using Abrasive Water-Jet Machining (Abrasive Water-Jet 가공에서 공작물의 절단특성)

  • 장현석;하만경;곽재섭;박후명;이상진;이기백
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2002.05a
    • /
    • pp.984-987
    • /
    • 2002
  • Abrasive water-jet(AWJ) machining is a new cutting technology. The AWJ can cut various materials such as metal, glass and stone. However, the AWJ machining makes troubles including kerf, rounding and side taper. In this study, we investigated the correlation between parameters of abrasive water-jet machining and cutting characteristics. The machining parameters were the material thickness and the traverse speed. The experiment was conducted to cut the stainless steel(STS41) and the mild steel(SS41) specimens. The results of the experiment were presented as the relation between cutting conditions and troubles of a dimension error, a conner error, an uncut width and a kerf.

  • PDF

Micro-pattern Fabrication of Amorphous Alloy by Laser Beam Machining (비정질 합금의 마이크로 패턴 레이저 가공)

  • Kim, Haan;Park, Jong Wuk
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.21 no.4
    • /
    • pp.77-83
    • /
    • 2022
  • Amorphous alloys exhibit excellent mechanical properties; therefore, application technology development is being attempted in various fields. However, industrial use of application technology is limited owing to the limitations in fabrication. In this study, micropattern fabrication of an amorphous alloy was conducted using laser beam machining. Although microhole fabrication is possible without the deformation of the amorphous phase through nanosecond pulsed laser beam machining, there are limitations in the generation of recast layers and spatters. In cover plate laser beam machining (c-LBM), a cover plate is used to reduce the thermal deformation and processing area. Therefore, it is possible to fabricate holes at the level of several micrometers. In this study, it was confirmed that recast layers are hardly generated in c-LBM. Furthermore, square-shaped micropatterns were successfully fabricated using c-LBM.

The Experimental Study in the Micro Drilling of Excimer Laser on Pyrex Glass (엑시머 레이저를 이용한 파이렉스 유리의 미세 구멍 가공)

  • Lee, Chul-Jae;Kim, Ha-Na;Jeong, Yun-Sang;Jun, Chan-Bong;Park, Young-Chul;Kang, Jung-Ho
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.11 no.5
    • /
    • pp.99-103
    • /
    • 2012
  • Presently, A glass is widely used in telecommunication system, optoelectronic devices and micro electro mechanical systems. Micro drilling of glass using the laser can save processing cost and improve the accuracy. This paper experiments micro drilling using KrF excimer laser on the pyrex glass of $500{\mu}m$ thickness. We have experiment to find out optimum laser machining conditions of micro drilling of glass and ablation depth and influence by processing parameter suc'h pulse repetition rate, energy density and number of pulses. Pulse repetition rate don't influence ablation depth at the micro drilling of pyrex glass. Energy density influence micro drilling of parallelism and maximum thickness that can be drilled. Ablation depth is most influenced by number of pulses.

Improvement of surface quality of Tungsten-carbide core for glass micro molding (미세 유리 광부품 성형용 초경합금 코어의 표면거칠기 향상에 관한 연구)

  • Lee J.;Kim W.;Min B.;Kang S.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2004.10a
    • /
    • pp.36-39
    • /
    • 2004
  • Glass molding is an advantageous method to manufacture glass micro optical components. However, it is difficult to make Tungsten Carbide core for glass microlens array. We have developed novel method to fabricate Tungsten Carbide core for micro glass components using pressure forming. Silicon masters were fabricated by micro machining. Tungsten Carbide core was fabricated by pressure forming and sintering. And we made high quality surface of Tungsten Carbide core by using the magnetic-field-assisted polishing process.

  • PDF

A Study on the Cutting Characteristics of the Glass Fiber Reinforced Plastics by Drill Tools

  • Park, Jong-Nam;Cho, Gyu-Jae
    • International Journal of Precision Engineering and Manufacturing
    • /
    • v.8 no.1
    • /
    • pp.11-15
    • /
    • 2007
  • Composite materials are widely used to make all kinds of machine parts, internal and structural materials of cars, aerospace components, building structures, ship materials, sporting goods and others, It is worth while to use composite space substitute material in various applications when compared with others. But the use of composite material is limited in the field of the mechanical processing because of the difficulties in processing. Thus, it is proved that the surface is rough at the in and out sections of the hole processing when the GFRP is machined with HSS drill in the vertical machining center. And it is observed that the more it is processed, the more the fluid type long chip is changed into the powdered chip.

Fabrication of Copper Electrode Array and Test of Electrochemical Discharge Machining for Glass Drilling (유리의 미세 구멍 가공을 위한 구리 전극군 제작 및 전기 화학 방전 가공 시험)

  • Jung, Ju-Myoung;Sim, Woo-Young;Jeong, Ok-Chan;Yang, Sang-Sik
    • Proceedings of the KIEE Conference
    • /
    • 2003.10a
    • /
    • pp.297-299
    • /
    • 2003
  • In this paper, we present the fabrication of copper electrode array and test of electrochemical discharge machining for the fabrication of microholes on Borofloat33 glass. Copper electrode array is fabricated by the bonding of silicon upper substrate and lower substrate and copper electroplate. The silicon upper electrode having microholes fabricated by ICP-RIE is the mold of copper electroplate. The lower substrate is used as the seed layer for copper electroplate after Au - Au thermocompression bonding with the upper substrate.

  • PDF

Maskless Nano-fabrication by using both Nanoscratch and HF Wet Etching Technique (나노스크래치와 HF 에칭기술을 병용한 Pyrex 7740의 마스크리스 나노 가공)

  • 윤성원;이정우;강충길
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2003.06a
    • /
    • pp.628-631
    • /
    • 2003
  • This study describes a new mastless nano-fabrication technique of Pyrex 7740 glass using the combination of nanomachining by nano-indenter XP and HF wet etching. First, the surface of a Pyrex 7740 glass specimen was machined by using the nano-machining system, which utilizes the mechanism of the nano-indenter XP. Next, the specimen was etched by HF solution. After the etching process, the convex structure or deeper hole is made because of masking or promotion effect of the affected layer generated by nano-machining. On the basis of this interesting fact. some sample structures were fabricated.

  • PDF