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OPTIMIZATION OF CUTTING EDGE GEOMETRY OF DRILLS IN DRILLING DIFFICULT TO CUT MATERIALS

Research Project

Project/Area Number 13650132
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 機械工作・生産工学
Research InstitutionSEIKEI UNIVERSITY

Principal Investigator

HIROTA Akihiko  SEIKEI UNIVERSITY, FACULTY OF ENGINEERING, PROFESSOR, 工学部, 教授 (70016682)

Co-Investigator(Kenkyū-buntansha) KASAHARA Kazuo  SEIKEI UNIVERSITY, FACULTY OF ENGINEERING, INSTRUCTOR, 工学部, 講師 (50169405)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2003: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2002: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2001: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsDIFFICULT TO CUT MATERIALS / DRILLING / NEGATIVE RAKE ANGLE / CHAMFER / DEAD METAL / CUTTING MODEL / CUTTIG FORCE / CHIP FORMATION
Research Abstract

1.FOR CUTTING WITH LARGE NEGATIVE RAKE ANGLE TOOLS HAVING ARTIFICIALLY CONTROLLED TOOL-CHIP CONTACT LENGTH OR WITH THAT TOOLS HAVING NATURAL TOOL-CHIP CONTACT LENGTH, CUTTING MODELS IN WHICH THE MODE OF DEFORMATION IS APPROXIMATED WITH THE VELOCITY DISCONTINUITY LINES ARE DEVELOPED. THE CUTTING MODELS ARE ABLE TO EXPLAIN THE TRANSITION OF CHIP FORMATION PROCESS INVOLVING DEAD METAL ON THE PRIMARY RAKE FACE IN TWO MODELS. THE DEAD METAL ON THE RAKE FACE DOES NOT DISAPPEARED EVEN IN LOW FRICTIONAL CONDITION WHERE CUTTING FLUID IS SUPPLIED SUFFICIENTLY. IT IS FOUND THAT PREDICTED RESULTS ARE IN GOOD AGREEMENT WITH EXPERIMENTAL RESULTS.
2.FOR CUTTING WITH TOOLS HAVING THREE RAKE SURFACES, THAT IS, CHAMFERED EDGE AND SECONDARY RAKE FACE WITH ARTIFICIALLY CONTROLLED TOOL-CHIP CONTACT LENGTH, THREE-DIMENSIONAL OBLIQUE CUTTING MODEL CONSIDERING TRANSLATIONAL VELOCTY ALONG THE CUTTING EDGE IS DEVELOPED. EXPERIMENTS USING QUICK STOPPING DEVICE TO FREEZE THE CHIP FORMATION WERE MADE, AND IT IS FOUND THAT THE DEAD METAL CONTINUES TO EXIST IN THE RANGE OF 50° OF INCLINATION ANGLE.
3.BASED UPON THE DATA SUCH AS CUTTING FORCES OBTAINED THROUGH ENERGY METOD FOR DRILLING WITH FLAT RAKE FACE DRILL, CUTTING TEMPERATURE IS CALCULATED USING FINITE ELEMENT METHOD. FOR LONG-PITCH CHIP FORMATION IN DRILLING STAINLESS STEEL SUS304(JIS), HIGH TEMPERATURE REGIONS APPEAR IN OUTER PORTION CORRESPONDING TO MARGIN AND INNER PORTION OF THE MAIN CUTTING EDGE.
4.FOR DRILLING STAINLESS STEEL SUS304(JIS) WITH DRILLS OF HIGH SPEED STEEL OR SINTERED CARBIDE, IT IS FOUND FROM EXPERIMENT TO GIVE LONG TOOL LIFE THAT THE ADEQUATE CONDITION IS RAKE ANGLE OF CHAMFERED PORTION (PRIMARY RAKE ANGLE) ; -15 〜 -30°, PROJECTED LENGTH OF SECONDARY RAKE FACE ; 0.3〜O.7 TIMES FEED RATE(HIGH SPEED STEEL), 0.15〜0.3 TIMES FEED RATE(SINTERED CARBIDE) AND TOTAL PROJECTED TOOL-CHIP CONTACT LENGTH ; ABOUT 1.4 TIMES FEED RATE.

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (12 results)

All 2004 2003 2002 Other

All Journal Article (8 results) Publications (4 results)

  • [Journal Article] 大きな負のす<い角をもつ工具の切削特性(第8報)2004

    • Author(s)
      廣田 明彦
    • Journal Title

      2004年度精密工学会春季大会学術講演会講演論文集

      Pages: 539-540

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] CUTTING PERFORMANCE OF LARGE NEGATIVE RAKE ANGLE TOOLS (8TH. REPORT)2004

    • Author(s)
      AKIHIKO, HIROTA
    • Journal Title

      PAPER FOR SPRING ANNUAL MEETING OF JSPE

      Pages: 539-540

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] 大きな負のす<い角をもつ工具の切削特性(第7報)2003

    • Author(s)
      廣田 明彦
    • Journal Title

      2003年度精密工学会春季大会学術講演会講演論文集

      Pages: 147-147

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] CUTTING PERFORMANCE OF LARGE NEGATIVE RAKE ANGLE TOOLS (7TH. REPORT)2003

    • Author(s)
      AKIHIKO, HIROTA
    • Journal Title

      PAPER FOR SPRING ANNUAL MEETING OF JSPE

      Pages: 147-147

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] 大きな負のすくい角をもつ工具の切削特性(第6報)2002

    • Author(s)
      廣田 明彦
    • Journal Title

      2002年度精密工学会春季大会学術講演会講演論文集

      Pages: 293-293

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] ステンレス鋼のドリル加工における切れ刃形状について(第3報)2002

    • Author(s)
      廣田 明彦
    • Journal Title

      2002年度精密工学会春季大会学術講演会講演論文集

      Pages: 501-501

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] CUTTING PERFORMANCE OF LARGE NEGATIVE RAKE ANGLE TOOLS(6TH.REPORT)2002

    • Author(s)
      AKIHIKO, HIROTA
    • Journal Title

      PAPER FOR SPRING ANNUAL MEETING OF JSPE

      Pages: 293-293

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] ON THE CONFIGURATION OF CUTTING EDGE FOR DRILLING OF STAINLESS STEEL(3RD.REPORT)2002

    • Author(s)
      AKIHIKO, HIROTA
    • Journal Title

      PAPER FOR SPRING ANNUAL MEETING OF JSPE

      Pages: 501-501

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 廣田明彦, 笠原和夫, 橋本崇洋: "大きな負のすくい角をもつ工具の切削特性(第8報)"2004年度精密工学会春季大会学術講演会講演論文集. 539-540 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 廣田明彦, 笠原和夫, 池田武史: "大きな負のすくい角を持つ工具の切削特性(第7報)"2003年度精密工学会春季大会学術講演会講演論文集. 147 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 廣田明彦: "大きな負のすくい角をもつ工具の切削特性(第6報)"2002年度精密工学会春季大会学術講演会講演論文集. (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] 廣田明彦: "ステンレス鋼のドリル加工における切れ刃形状について(第2報)"2002年度精密工学会春季大会学術講演会講演論文集. (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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