• Title/Summary/Keyword: Intersecting hole

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Determination of Cutting Conditions for an Efficient Deburring Process Using a New Deburring Tool (새로운 디버링 공구를 이용한 드릴링 버의 효율적 제거를 위한 가공조건 선정)

  • Bae, Jun-Kyung;Park, Ha-Young;Kwon, Byeong-Chan;Ko, Sung-Lim
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.15 no.4
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    • pp.109-117
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    • 2016

  • For efficient deburring of burrs that form inside mechanical parts after drilling, new special deburring tool was developed specifically for the burr found at intersecting holes. In this paper, the process for finding ideal cutting conditions has been carried out to identify the efficient performance of deburring using a new tool. The burrs at the entrance and exit surface were analyzed for efficient removal. The surface roughness after deburring was also reviewed for better performance. In addition, the influence of the feed rate on deburring quality was analyzed for improved productivity. Through this process, a new deburring tool can be applied effectively to remove burrs formed at intersecting holes.

  • https://doi.org/10.14775/ksmpe.2016.15.4.109 인용 PDF KSCI

Deburring experiment in drilling hole on the inclined exit surface (경사진 출구면에 발생한 버의 제거를 위한 디버링 공구의 효율적 운용)

  • Kim B.K.;Lee K.U.;Park J.W.;Hong S.I.;Ko S.L.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.10a
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    • pp.773-776
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    • 2005

  • An Experiment was carried out to study deburring in frilling hole on the Inclined exit surface. Two different deburring tools, exit surface angles, materials and cutting conditions were selected to check their performance using CNC machining center. In deburring operation, there are not only flat exit surfaces but also inclined exit surfaces which is described as inclination angle. Inclination of exit surface causes a quite different burr formation when comparing with flat surface. Deburring characteristics are analyzed according to the deburring tools and cutting conditions. Several strategies for a effective deburring on inclined exit surface were proposed.

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Guidelines for Free-Hand Aspiration(FHA) of Putaminal Hemorrhage (피각부 자발성 뇌내출혈의 혈종흡입술을 위한 지표)

  • Yim, Sin Gil;Oh, Min Suk;Lim, Jun Seob;Kang, Myung Gi;Kwak, Yeon Sang;Park, Seung Gyu;Song, Gyung Bae;Kim, Han Yung
    • Journal of Korean Neurosurgical Society
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    • v.30 no.sup2
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    • pp.294-299
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    • 2001

  • Objectives : CT-guided stereotactic evacuation for spontaneous intracerebral hemorrhage can minimize the brain damage and can be performed safely and simply under local anesthesia. But that procedure is time consuming and has a risk of rebleeding because of the stress during head pin fixation. So authors describe easy and precise guidelines for FHA of putaminal hemorrhage without stereotactic instrument. Methods and Materials : We analyzed the data of 298 patients who underwent CT-guided stereotactic aspiration of putaminal hematoma in our hospital between January 1990 and December 2000. We divided the patients into three groups according to the location of hematoma : anterior portion, middle portion and posterior portion of putamen. Total number of catheters inserted into the hematoma were 345 and there were with regard to the direction and depth of catheters. Results : Proposed guidelines of catheter insertion to putaminal hemorrhage in our institution. 1) hematoma at the anterior portion of putamen ; Direction of catheter was the midpupillary line of the eye and the point intersecting a line drawn from the burr hole to a point between external auditory meatus(EOM) and 1cm posterior to EOM. Depth of catheter was 6-6.5cm. 2) hematoma at the middle portion of putamen ; Direction of catheter was the midpupillary line of the the eye and the point intersecting a line drawn from the burr hole to a point between 1cm and 2cm posterior to EOM. Depth of catheter was 6.5-7cm. 3) hematoma at the posterior portion of putamen ; Direction of catheter was 15 degree laterally from the midpupillary line of the eye and the point intersecting a line drawn from the burr hole to a point between 2cm and 3cm posterior to EOM. Depth of catheter was 7-7.5cm. We have performed FHA of putaminal hemorrhage in 48 cases according to this guideline. All catheter were inserted exactly at the center of hematoma and average operation time was about 30 minutes. Conclusion : Our proposed guidelines for putaminal hemorrhage are considered to be safe and simple method with similar accuracy and rapid decompression compared with traditional stereotactic method. Main advantages of this technique were unnecessity of stereotactic frame application and less time requirement for hematoma removal.

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