• Title/Summary/Keyword: Multi tapping machine

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A Study on the Multi Tapping Process Characteristics and Tread Quality under Difference Pitch (피치가 다른 다축 태핑에서의 가공 특성과 품질 평가에 관한 연구)

  • Lee, Jong-Hyung;Yi, Chang-Heon;Kim, Young-Moon;Lee, Sang-Young;Lee, Sang-Joong
    • Journal of the Korean Society of Industry Convergence
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    • v.9 no.4
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    • pp.277-283
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    • 2006
  • As the products such as HDD, Notebook, PDA, and Mobile Phone become smaller and thinner, the radius of threads as well as holes for assembling those products become smaller, even down to 1mm. To produce such small holes and thread efficiently, multi tapping is highly necessitated. However the multi tapping characteristics is not well known because its complicated cutting mechanism and thus the quality of the produced holes and threads is not well studied yet. In this paper, experiments have been conducted for small-radius threads using M2 and M2.6 and M3 cold forming tap to investigate multi tapping process using several useful signal such as torque and Z-axis encoder pulse. The surface and profile of the machined threads have been magnified and observed through a SEM.

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Application Estimate of 6 Degree of Freedom Industrial Robot for Multi-Axes Cutting Machine (다축 절삭가공용으로의 육관절 산업용 로봇의 적용평가)

  • Cheong, Seon-Hwan;Choi, Seong-Dae;Kweon, Hyun-Kyu;Choi, Eun-Hwan
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.2 no.4
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    • pp.33-39
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    • 2003
  • The stiffness of multi-articulated industrial robots is very weak, because their structure is an articulated type with some links and joints. Thus it is known that cutting processes for metals are not accepted in machine shop well, but they have a lot of merits for cutting processes, for example, drilling, tapping, and engraving etc, because of the characteristics of their high degree of freedom. The temptation of cutting aluminium was carried out to investigate the feasibility and the limitations or constraints for cutting metals on them. First the mode shapes of 6 degree of freedom welding robot were taken and analysed, and next the cutting processes were practically carried out on it. The results of study were found out to show the feasibility of cutting processes at drilling under 6mm of tool diameter, as well as to have some limitations and constraints, for examples, feed rate, depth of cut and cutting force etc.

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A Study on the Endmilling using the Multi-Articulated Robot (다관절 로봇을 이용한 엔드밀 가공에 관한 연구)

  • 최은환;정선환;최성대
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.1772-1775
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    • 2003
  • The stiffness of multi-articulated industrial robots is very weak, because their structure is an articulated type with some links and joints. Thus it is known that cutting processes for metals are not accepted in machine shop well, but they have a lot of merits for cutting processes, for example. drilling, tapping. and engraving etc., because of the characteristics of their high degree of freedom. The temptation of cutting aluminium was carried out to investigate the feasibility and the limitations or constrains for cutting metals on them. First the mode shapes of 6-axes FANUC welding robot were taken and analysed, and next the cutting processes were practically carried out on it. The results of study were found out to show the feasibility of cutting processes at end-milling under 6mm of tool diameter. as well as to have some limitations and constrains, for examples, surface roughness and feed rate, depth of cut, cutting force etc..

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An Experimental Study or the Prediction Method of Floor Impact Sound Insulation Performance in Apartment House Using Impedance Method(II) (임피던스법을 이용한 공동주택 바닥 충격음 차음성능 예측방법에 관한 실험 적 연구(II) - 경량 표준충격원을 중심으로 -)

  • 김재수;장길수;김선우
    • Journal of KSNVE
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    • v.2 no.1
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    • pp.21-31
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    • 1992
  • In the previous paper, we report a practical floor impact sound level prediction method for a heavyweight impact source(Tire), soft impact source such as children jumping and running. According to these results, the calculated value and the measured value correspond comparatively well, regardless of differences in the floor structures. And the floor impact sound for a heavyweight impact source, soft source was strongly influenced by structural factors such as floor slab stiffness and peripheral support conditions. But the floor impact sound for a light impact source (Tapping machine), hard impact source was influenced by resilient layers, composed of multi-layer in floor structures. Thus, In this paper, 4 actual floor structures, all with differing resilient layers, were calculated using impedance method. When these calculation values were compared with the measured values, approximately all the values fell with one rank of the sound insulation grade, reference curve(L curve) by the JIS standard. So, a sample of measured values and calculated values from floor structures is presented to show the accuracy and appropriateness of the impedance method in domestic.

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