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AssigneeGershon System Ltd.
InventorGershon Harif
Estimating the term…
A method for designing a cutting edge of a cutting element configured for removing material from a workpiece to leave therein a desired end profile (B22,B24,B26). The method comprises the steps of modeling a desired end profile (B22,B24,B26) of the workpiece, the profile having a longitudinal axis and being defined by a bottom surface (B12), a side surface (B16) and an adjustment surface (B14) extending therebetween; defining a lead profile plane (RPL) and an trail profile plane (RPT) spaced therefrom, each of the planes being oriented perpendicular to the longitudinal axis; determining a profile contour defined by the intersection line between the end profile (B22,B24,B26) and the lead profile plane (RPL). The contour profile includes a bottom contour, an adjoining contour and a side contour defined as the intersection lines between the lead profile plane (RPL) and the bottom surface (B12), the adjustment surface (B14) and the side surface (B16) respectively; designing a rake surface and a relief surface, the intersection line between which defines a cutting edge lying in the adjoining surface (B14) and spanning between the lead profile plane (RPL) and the trail profile plane (RPT). The cutting edge is designed such that in any reference plane (RP; FIG. 6A) oriented perpendicularly to the cutting edge, the intersection between each of the rake surface and the relief surface with the reference plane (RP) defines a respective rake line (RK; FIG. 7) and relief line (RF; FIG. 7), the angle (θB) between the lines RK,RF) being equal to or smaller than a similar angle (θB) taken along each of a plurality of similar reference planes (RP) disposed between the reference plane (RPn) and the lead profile plane (RPL).
A cutting element for removing material from a workpiece and forming therein an end profile extending along a longitudinal axis, said cutting tool being formed with a cutting portion having a rake surface and a relief surface and a cutting edge defined at the intersection therebetween and comprising a bottom segment and a side segment, the cutting portion being boundable by a bottom reference surface and a side reference surface transverse thereto, so that said bottom segment lies along a maximal length thereof, on said bottom surface and said side segment lies along a maximal length thereof, on said side surface, the cutting edge further comprising an adjoining segment lying outside the bottom and side reference surfaces, said adjoining segment being defined by an intersection between corresponding rake and relief portions of said rake surface and relief surfaces, wherein, for any given normal reference plane oriented perpendicular to said adjoining segment and disposed between a lead end and trail end of the adjoining segment, the intersection between each of the rake portion and the relief portion with said normal reference plane defines a respective rake line and relief line and the angle between these lines is equal to or smaller than a corresponding angle taken along each of a plurality of other normal reference planes disposed between the given normal reference plane and the lead end.
A cutting piece comprising a front surface, a rear surface and at least one side surface extending therebetween having a first portion and a second portion angled to one another to form a corner, the cutting insert being formed with a main cutting edge defined at the intersection between said front surface and the corner of the side surface, said cutting insert further comprising an additional cutting element disposed on the corner of the side surface and protruding therefrom, said additional cutting element having an auxiliary cutting edge defining a first intersection point at its point of contact with said first portion, and a second intersection point at its point of contact with said second portion, neither of the intersection points coinciding with said main cutting edge, the auxiliary cutting edge extending along said corner between said first intersection point and said second intersection.
A cutting tool configured for removing material from a workpiece in order to form therein a corner of angle θ, said cutting tool comprising a first cutting portion comprising a first rake surface and a first relief surface and defining therebetween a first cutting edge defining a first cutting contour, and a second cutting portion, spaced from the first cutting portion, and comprising a second rake surface and a second relief surface and defining therebetween a second cutting edge defining a second cutting contour, said first cutting edge having a first lead end and a first trail end, said second cutting edge having second lead end and a second trail end, the first lead end being located in front of the lead end of the second lead end so as to come into contact with the workpiece during a cutting operation before the second lead end, wherein the first cutting contour and the second cutting contour together define said angle θ and cooperate to form said corner.
Dependencies are inferred from the claim text.