Sandvik Ab

Sandvik Intellectual Property Ab

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Sandik Ab

Robert Isaksson

Jorgen V Wiman

Sture Muren

Jan-Olof Olsson

Håkan Fransson

Håkan Ericksson

Yusuke Seto

Martin Hansson

A thread-cutting insert includes opposite top and bottom sides as well as front and back sides, the front one of which is formed with a plurality of laterally spaced-apart teeth, which separately have a chip-removing edge in a transition between a clearance surface and a top surface of the individual tooth, one the of the teeth, viz. a final-shaping tooth, having a contour shape that gives the desired profile shape of the thread that is to be generated. At least one downwardly open duct is formed in the bottom side of the cutting insert, which duct extends up to the final-shaping tooth and ends adjacent to the same. Advantageously, such ducts are formed for all teeth.

Thread cutting insert

Cutting insert element

In an insert holder for indexable cutting inserts, a clamping device is located which includes an L-shaped member having first and second arms. The first arm is received in a blind hole in the cutting insert and the second arm is actuated by a pressure screw. A free end portion of the second arm has a yoke received in a recessed annular waist portion of the screw so that movement of the screw causes the L-shaped member to rotate and push the insert downwardly against a base surface and laterally against an upright support surface. The insert has a central elevated plateau on its top side to enable a depth of the blind hole to be maximized.

Pin lock system for cutting insert having a blind hole

A cutting insert intended for heavy turning operations has a top side, a bottom side, a front surface disposed between the top and bottom sides, and a cutting edge disposed in the area between the top side and the front surface. The cutting insert includes a comparatively thick front part having a chip breaker positioned behind the edge and a rear part, which is thinner than the front part and tapers rearwardly therefrom. Disposed in the top side of the rear part is a recess for receiving a clamping unit to fix the cutting insert in a co-operating sear of a holder.

Cutting insert for heavy turning operations

Turning insert for railway wheel axle turning

Turning insert for railway wheel turning

A cutting insert enables the use of one single type of insert to achieve close tolerances and good surface finish in a bar peeling tool. The insert includes convexly curved corners, between which are disposed flat interconnecting surfaces. The chip face has an elevated plateau, portions of which extend to respective corners. On one side of a bisector of the corner, the plateau section is of concave shape, and on the other side of the bisector the plateau section is of convex shape.

Cutting insert for a bar peeling operation

An indexable cutting insert for metal machining, in particular turning, is formed with banana- or C-shaped protrusions (11) adjacent to each operative cutting corner. The concave side of the protrusion faces in a direction towards the cutting corner. In comparison with corresponding inserts without such a protrusion a better chip control is achieved. Thus, the chip flow is led away from the machined surface both at small and large cutting depths and the chips are broken into suitable lengths.

Cutting insert with chip control protrusion on a chip surface

Cutting insert

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Järbo, Sweden

Robert Isaksson