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Volume 25 Issue 4
Apr.  1999
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Journal of Beijing University of Aeronautics and Astronautics  > 1999  >  25(4): 462-466.
Lü Yanming, Fan Rui, Chen Wuyi, et al. Study on Effect Tail Clearance Angle in NC Sharpening of Twist Drills[J]. Journal of Beijing University of Aeronautics and Astronautics, 1999, 25(4): 462-466. (in Chinese)
Citation: Lü Yanming, Fan Rui, Chen Wuyi, et al. Study on Effect Tail Clearance Angle in NC Sharpening of Twist Drills[J]. Journal of Beijing University of Aeronautics and Astronautics, 1999, 25(4): 462-466. (in Chinese)
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Study on Effect Tail Clearance Angle in NC Sharpening of Twist Drills

  • Beijing University of Aeronautics and Astronautics,Dept. of Manufacturing Engineering

  • Received Date: 12 Jan 1998
  • Publish Date: 30 Apr 1999
    Abstract
  • Through studying the flank face geometry of twist drills, a new concept of effect tail clearance angle is proposed. A method for calculating the effect tail clearance angles is given. The relations between grinding parameters and the effect clearance angles are studied.This paper also shows how to use the new concept as a further criterion to arrive at a solution to the conical grinding method for a drill of given specification. The results show that the tail clearance angle is a very important parameter to drills performance, and the sharpening parameters determine the tail clearance angle. Five sharpening parameters have different effect on the tail clearance angle, θ has the most significant influence and the order of the significance of the other four is Cy、σ、ω、Cx.

     

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    • References(1)
  • 1. Armarego E J A, Rotenberg A. An investigation of drill point sharpening by the straight lip conical grinding method.Int J Mach Tool Des Res,1973, 13 :155~164 2. 曹正铨. 钻尖的数学模型与钻削试验研究. 北京:北京理工大学出版社,1993. 10~20 3. 张 伟. 钻尖数控刃磨技术研究:[学位论文].北京:北京航空航天大学制造工程系,1993 4. Fujil S, Deveries M F, Wu S M.An analysis of drill geomrtry for optimum drill desige by computer.Journal of Engineering for Industry,1970(8):657~666 5. Tsai W D, Wu S M.Computer analysis of drill point geometry.Int J Mach Tool Des Res, 1979, 19:95~108 6. Tsai W D, Wu S M. A mathematical model for drill point design and grinding.Journal of Engineering For Industry, 1979, 101:333~340 7. Fugelso M A, Wu S M.An analysis and categorization of twist drill grinding. Journal of Engineering for Industry, 1979, 101:205~214 8. Watson A R.Drilling model for cutting lip and chisel edge and comparison of experimental and predicted results.Int J Mach Tool Des Res,1985,25(4):347~365
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