Cutting tip and method thereof

A method for manufacturing a cutting tool made up of a shank and a tip attached to the shank, comprising the steps of:

• preparing a three-layer laminate wherein a second layer consisting of a hard sintered compact of CBN or diamond is sandwiched by a first layer and a third layer consisting of a tool material such as cemented carbide;
• cutting out a prismatic blank of rectangular cross-section by cutting the first layer, the second layer and the third layer in order substantially perpendicularly from the upper face of the first layer;
• cutting out a semi-completed tip including the second layer in the middle thereof by cutting from one of the cut faces of the prismatic blank to the other cut face;
• joining the semi-completed tip to a separately prepared shank;
• and
• obtaining a completed tip by forming on the semi-completed tip a rake face, a cutting edge and a flank.

A method for manufacturing a cutting tip, comprising the steps of:

• preparing a three-layer laminate wherein a second layer consisting of a hard sintered compact of CBN or diamond is sandwiched by a first layer and a third layer consisting of a tool material such as cemented carbide;
• cutting out a prismatic blank of rectangular cross-section by cutting the first layer, the second layer and the third layer in order substantially perpendicularly from the upper face of the first layer;
• cutting out a semi-completed tip including the second layer in the middle thereof by cutting the prismatic blank on a cutting plane orthogonal to or inclined at a predetermined angle to a cut face formed in the blank cutting step;
• and
• obtaining a completed tip by forming on the semi-completed tip a rake face, a cutting edge and a flank.

A method for manufacturing a cutting tool made up of a shank and a tip attached to the shank, comprising the steps of:

• preparing a three-layer laminate wherein a second layer consisting of a hard sintered compact of CBN or diamond is sandwiched by a first layer and a third layer consisting of a tool material such as cemented carbide;
• cutting out a prismatic blank of rectangular cross-section by cutting the first layer, the second layer and the third layer in order substantially perpendicularly from the upper face of the first layer;
• cutting out a semi-completed tip including the second layer in the middle thereof by cutting the prismatic blank on a cutting plane orthogonal to or inclined at a predetermined angle to a cut face formed in the blank cutting step;
• joining the semi-completed tip to a separately prepared shank;
• and
• obtaining a completed tip by forming on the semi-completed tip a rake face, a cutting edge and a flank.