Influence of the dynamic characteristics of the tool and the blank on the vibroacoustic monitoring of cutting

Development of residual cutting tool life prediction algorithm by processing on CNC machine tool

“…As a measure of wear can be taken either the width of the worn place h w , or radial (size) wear h r -shortening of the tool size, on which in many respects depends the processing accuracy. The constancy of the ratio between h w and h r is confirmed in the [7].…”

“…By finishing on one machine tool the permitted wear by technological criterion will possess a defined constant value h ½ . Beyond its limit the regulated accuracy or roughness are violated, or quality parameters of the surface layer of the part [7]. The tool failure, or parametric failure, will come when its wear will reach the value h ½ .…”

“…5. In the algorithm it is assumed, that the party of identical parts is machined by one defined cutting mode during the operating time of one tool till its replacement [7,11,12]. The prediction technique T R is based on the fact, that under these conditions resulted experimental dependences h ¼ f ðTÞ the stage of the steady-state wear II can be described by the straight line h ¼ kT.…”

Geometric shaping in cutting

“…Taking account of the motions ω and ω 0 , we con clude that the intersection of point j of tool circle i in the motionless coordinate system xy is determined by the angle ξ ij between the -y axis and the radius passing through the point of intersection from the center O 0 (11) The maximum angle ξ ij determines the angular coordinate of point i of the desired tool profile (12) On the basis of Eqs. (6)-(12), for each value of i, we may find all i points of profile U from Eq.…”

“…In other words, the shap ing of the blank must be considered [1][2][3][4][5][6][7][8]. In solving some problems of this type, the cutting dynamics are taken into account, with a view to reducing the vibra tion and enhancing the precision and quality of machining [9][10][11][12]. In other problems, the focus is the kinematics of cutting [13,14].…”