Patent ID: 11873684
Assignee: SF DIAMOND CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 12:
13. A polycrystalline diamond compact, comprising:
a polycrystalline diamond layer, the polycrystalline diamond layer being in the form of a cylinder comprising an upper surface, a bottom surface, and a side wall connecting the upper surface and the bottom surface; and
a cemented carbide substrate, the cemented carbide substrate being bonded to the bottom surface of the polycrystalline diamond layer;, wherein:
the upper surface comprises a center part and an edge part;
the center part is a single surface;
the edge part comprises a plurality of cutting edges and a plurality of cutting removal grooves, and the plurality of cutting edges and the plurality of cutting removal grooves are radially distributed on the upper surface and surround the center part;
the plurality of cutting edges and the plurality of cutting removal grooves are alternately disposed on the upper surface;
a first end of each of the plurality of cutting edges and a first end of the plurality of cutting removal grooves are in direct connection to a peripheral edge of the single surface, and a second end of the each of the plurality of cutting edges and a second end of the plurality of cutting removal grooves communicate with the side wall;
an included angle between the each of the plurality of cutting edges and the side wall is greater than 90°, where the included angle between the each of the plurality of cutting edges and the side wall is an angle formed between a first straight line and a second straight line; the first straight line is in a plane of symmetry of the each of the plurality of cutting edges and passes through a center point of the center part and a point where the second end of the each of the plurality of cutting edges intersects with the plane of symmetry of the each of the plurality of cutting edges, and the second straight line is parallel to the side wall and intersects with the first straight line; and
an included angle between the each of the plurality of cutting removal grooves and the side wall is greater than 90°, where the included angle between the each of the plurality of cutting removal grooves and the side wall is an angle formed between a third straight line and a fourth straight line, where the third straight line is in a plane of symmetry of the each of the plurality of cutting removal grooves and passes through the center point of the center part and a point where the second end of the each of the plurality of cutting removal grooves intersects with the plane of symmetry of the each of the plurality of cutting removal grooves, and the fourth straight line is parallel to the side wall and intersects with the third straight line.