Roller cutters comprise a diamond-bonded body joined to an infiltration substrate. An extension is joined to the substrate and includes first section having a diameter sized the same as the substrate, and an integral second section having a diameter smaller than the substrate. The extension is joined to the substrate during an HPHT process. The first section has a thickness greater than that of the infiltration substrate. The second section has an axial length greater than the combined thickness of the substrate and the first section. The extension has a strength and/or toughness greater than the substrate as a result of its material composition, e.g., the amount of binder phase material and/or the size of hard phase material. The roller cutter is rotatably disposed within a pocket internal cavity, wherein the pocket is attached to a

Roller cutters comprise a diamond-bonded body joined to an infiltration substrate. An extension is joined to the substrate and includes first section having a diameter sized the same as the substrate, and an integral second section having a diameter smaller than the substrate. The extension is joined to the substrate during an HPHT process. The first section has a thickness greater than that of the infiltration substrate. The second section has an axial length greater than the combined thickness of the substrate and the first section. The extension has a strength and/or toughness greater than the substrate as a result of its material composition, e.g., the amount of binder phase material and/or the size of hard phase material. The roller cutter is rotatably disposed within a pocket internal cavity, wherein the pocket is attached to a

A drill bit for a down-the-hole drill hammer is provided that includes a head and a shank extending from the head. The head includes a plurality of non-concentrically or spirally arranged cutting members about its working face. The non-concentric or spiral arrangement of the cutting members in the drill bit and their overlapping cutting paths during rotation of the drill bit reduces the presence of concentric grooves or valleys being cut into the earthen terrain impacted by the bit thereby resulting in more complete cutting coverage.

A drill bit for a down-the-hole drill hammer is provided that includes a head and a shank extending from the head. The head includes a plurality of non-concentrically or spirally arranged cutting members about its working face. The non-concentric or spiral arrangement of the cutting members in the drill bit and their overlapping cutting paths during rotation of the drill bit reduces the presence of concentric grooves or valleys being cut into the earthen terrain impacted by the bit thereby resulting in more complete cutting coverage.

There is provided a base-integrated blade manufacturing method for manufacturing a base-integrated blade by fixing a cutting blade having a circular opening to a base having an annular projection. The method includes a first step of preparing the base having the projection that has an outside diameter greater than a diameter of the opening of the cutting blade, and the cutting blade, a second step of lowering a temperature of the base and thus shrinking the base to have the outside diameter of the projection smaller than the diameter of the opening of the cutting blade, a third step of inserting the projection into the opening of the cutting blade, and a fourth step of raising the temperature of the base and thus expanding the base in such a manner that the cutting blade is fixed to the base.

There is provided a base-integrated blade manufacturing method for manufacturing a base-integrated blade by fixing a cutting blade having a circular opening to a base having an annular projection. The method includes a first step of preparing the base having the projection that has an outside diameter greater than a diameter of the opening of the cutting blade, and the cutting blade, a second step of lowering a temperature of the base and thus shrinking the base to have the outside diameter of the projection smaller than the diameter of the opening of the cutting blade, a third step of inserting the projection into the opening of the cutting blade, and a fourth step of raising the temperature of the base and thus expanding the base in such a manner that the cutting blade is fixed to the base.

The present disclosure provides a carbide blade cutter head filling device and method, and relates to the field of alloy blade processing. The carbide blade cutter head filling device includes a feeding unit, a storage unit, a loading unit and a discharging unit which are arranged successively. The output end of the feeding unit is matched with the input end of the storage unit through the guide mechanism. The output end of the storage unit faces a conveying tray of the loading unit. The conveying tray is provided with a plurality of group of transition holes for accommodating blades. A receiving mechanism for accommodating a cutter head is arranged below the falling pull plate of the discharging unit. The falling pull plate adjusts the communication and isolation between the transition hole and the cutter head in the receiving mechanism by changing the relative position of the falling pull plate and the transition hole. A function of automatically feeding and loading the cutter head is fulfilled, the scattered blades are loaded into the cutter heads in batches instead of manually completing repeated work in a process of loading the blade into the cutter head. Therefore, the labor intensity of workers is reduced, the production efficiency is improved, and the blade production cost is reduced.

The present disclosure provides a carbide blade cutter head filling device and method, and relates to the field of alloy blade processing. The carbide blade cutter head filling device includes a feeding unit, a storage unit, a loading unit and a discharging unit which are arranged successively. The output end of the feeding unit is matched with the input end of the storage unit through the guide mechanism. The output end of the storage unit faces a conveying tray of the loading unit. The conveying tray is provided with a plurality of group of transition holes for accommodating blades. A receiving mechanism for accommodating a cutter head is arranged below the falling pull plate of the discharging unit. The falling pull plate adjusts the communication and isolation between the transition hole and the cutter head in the receiving mechanism by changing the relative position of the falling pull plate and the transition hole. A function of automatically feeding and loading the cutter head is fulfilled, the scattered blades are loaded into the cutter heads in batches instead of manually completing repeated work in a process of loading the blade into the cutter head. Therefore, the labor intensity of workers is reduced, the production efficiency is improved, and the blade production cost is reduced.

A holding device for fastening bar cutters in order for the cutting edges thereof to be coated, wherein the fastening is configured in such a way that a plurality of bar cutters can be arranged in a row such that the cutting faces and tips thereof have the same orientation, and the holding device includes a screen which at least partially protects the cutting faces from the coating, wherein, with bar cutters arranged in a row in the manner described, the top edge of the screen projects beyond the knife tips in such a way that no knife tips protrude.

A holding device for fastening bar cutters in order for the cutting edges thereof to be coated, wherein the fastening is configured in such a way that a plurality of bar cutters can be arranged in a row such that the cutting faces and tips thereof have the same orientation, and the holding device includes a screen which at least partially protects the cutting faces from the coating, wherein, with bar cutters arranged in a row in the manner described, the top edge of the screen projects beyond the knife tips in such a way that no knife tips protrude.