tailieunhanh - Kinematic Geometry of Surface Machinin Episode Episode 9

Tham khảo tài liệu 'kinematic geometry of surface machinin episode episode 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | The Geometry of the Active Part of a Cutting Tool 253 active part of a cutting tool in many cases is measured in reference planes configuration of which depends upon tangent planes to the surfaces Rs and Cs. The effect of the cutting edge torsion onto the material removal process in metal cutting has not yet been profoundly investigated. A cutting edge can be considered as a line of intersection of three surfaces the generating surface T of the cutting tool the rake surface R s and the clearance surface Cs. The equation of the cutting edge can be derived as a result of mutual consideration of the equation of one of three pairs of surfaces a rrs Urs Vrs and rcs Ucs Vcs b rT Ut Vt and rrs Urs vJ or c rTUt Vt and rcsUcs Vcs . The solution to any of three pairs of equations can be reduced to the equation of the cutting edge which yields representation in matrix form r r f ce ce ce XT tce Yt te Zt t ce 1 where t ce denotes the parameter of the cutting edge. In a particular case length Sce of the cutting edge can be chosen as the parameter of the cutting edge that is tce Sce . Under such a scenario torsion Tce of the cutting edge can be computed from T ce p2e Í dv r. Ì L dSe dSf d S3e J -1-1 where the sign of the torsion Tce is not in compliance with the direction of the angle of inclination As. Diagrams of Variation of the Geometry of the Active Part of a Cutting Tool Analytical methods for the computation of actual values of the geometry of the active part of a cutting tool are accurate. They are capable of computing the distribution of a geometrical parameter of a cutting tool both at a given point of the cutting edge in different reference cross-sections or within the active part of the cutting edge in similar cross-sections. Results of such computations are accurate and are of critical importance to a tool designer. For the preliminary analysis of the geometry of the active part of a cutting tool the implementation of diagrams of variations of the .