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SD Study on Complex Helical Drill Grinding Theory and Technology

Author: YangXuLei
Tutor: GongYaDong
School: Northeastern University
Course: Mechanical Manufacturing and Automation
Keywords: SD Helical Drill Point Mathematical model Characterization Parameter Experimental Analysis
CLC: TG580.23
Type: Master's thesis
Year: 2008
Downloads: 22
Quote: 0
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Abstract


Drilling in metal cutting applications is very wide, the hole machining is one of the most commonly used material removal method . Different industries , processes amounted to a total amount of processing operations from 20% to 40% , so drilling technology has been an important issue for the field of machining oft research . The drill bit is used the cone twist drill , but the drill tip flank movement between the grinding machine tools is more complex , not easy to accurately control the geometric parameters of the drill tip . This study is a complex helical surface drilling the tip sharpening principle and sharpening technology , this drill sharpening movement is simple , to precisely control the grinding parameters . The paper focuses on the research carried out in the following aspects : ( 1 ) drill its course of development of the grinding technology . Review of several commonly used drill tip flank grinding method proposed the research spiral surface drill necessity and feasibility studies . (2) the drill tip is the most important part of the drill bears the cutting , the study of the drill is mainly on the drill tip . Commonly used drill problem , start from the analysis of the relationship between the drill point grinding principle and its movement to establish the mathematical model of the drill flank and rake face . ( 3) the relationship between the geometric parameters of the analysis of grinding parameters and drill . (4 ) of the the complex helical surface drill tip geometry parameters were analyzed to establish a series of geometric parameters of the mathematical model , the theoretical analysis of Helical Drill sharp geometric angular distribution reasonable , which helps on drilling the tip of the parameters are analyzed and precise control . (5 ) The experimental analysis . The complex helical surface grinding in accordance with the principles of the present subject drill tip and the drill tip is applied to the drilling experiment by changing the grinding parameters , the comparative experiment , while the a different drill tip drilling force and drilling quality for analysis. The experiments show that : compared complex Helical Drill Point with ordinary twist drill drill tip , complex spiral surface drill tip in close to the discrepancies in the actual large posterior horn , and the chisel for the \drilling axial force is small , has a better chip removal capacity , and the diameter of the borehole diameter drill very close , good quality drilling .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal cutting and machine tools > Grinding and grinding machine > General issues > Grinder design, manufacture and maintenance > Structure
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