A circular saw blade to cut electric resistance welded pipes in the electric resistance welded pipe production line experiences an excessive load on hard tips thereof because of the limited cutting time, which results in reduced durability and chipping. [Solution] A flank 18 is provided with a first flank 20 located at the center thereof, and second and third flanks 22, 24 located inclined toward the respective sides of the first flank 20. Therefore, the lateral sides of the flank 18 have a constant clearance angle rearward from a cutting edge 34, which provides advantages of increased strength and resistance to chipping. Furthermore, a fourth flank 26 having a larger clearance angle is separately provided at the rear of the first flank 20 located at the center. Even if the first flank 20 wears, it is possible to reduce the wear on the fourth flank 26 and improve the durability.

A tipped circular saw blade includes a disk-shaped metal base having a central axis of rotation, and a plurality of circumferentially-spaced tips extending radially outward from an outer periphery of the metal base. Each tip includes a flank along the radially outer portion thereof, a side face located along a side of the flank, and a chamfer extending between the flank and the side face. The chamfer is oriented at a chamfered angle with respect of the flank. Further, each tip includes a cutting edge located on an end of the flank in the circumferential direction. The cutting edge is configured to cut the workpiece. In addition, each tip includes a groove formed on the flank and extending circumferentially from the cutting edge. The width of the groove may be 0.20 mm to 0.30 mm.

A tipped circular saw blade includes a disk-shaped metal base having a central axis of rotation, and a plurality of circumferentially-spaced tips extending radially outward from an outer periphery of the metal base. Each tip includes a flank along the radially outer portion thereof, a side face located along a side of the flank, and a chamfer extending between the flank and the side face. The chamfer is oriented at a chamfered angle with respect of the flank. Further, each tip includes a cutting edge located on an end of the flank in the circumferential direction. The cutting edge is configured to cut the workpiece. In addition, each tip includes a groove formed on the flank and extending circumferentially from the cutting edge. The width of the groove may be 0.20 mm to 0.30 mm.

A method for producing a machining segment from a first powdered matrix material and first hard material particles arranged according to a defined first particle pattern, includes: applying a powdered supporting material as a supporting layer with a melting temperature higher than the first matrix material, arranging the first hard material particles according to the defined first particle pattern in the supporting material with a depth of penetration, applying a first layer of the first matrix material to the first hard material particles and the supporting material and fusing the first layer by a powder bed fusion method, and performing a sequence of a plurality of steps N times, N1, wherein, in a first step of the sequence, a layer of the first matrix material is applied to the layer structure, and in a second step of the sequence, the layer of the first matrix material is fused by the powder bed fusion method and connected to the layer structure.

The present disclosure concerns a saw tooth holder for a cutting disk of a rotary cutting machine. The saw tooth holder comprises a holder body having a tooth-receiving surface abuttable against a rear surface of a saw tooth of a tooth assembly and a trailing surface, opposed to the tooth-receiving surface, and defining a trailing oblique angle with respect to the tooth-receiving surface. The holder body has a fastener-receiving aperture extending therethrough between the tooth-receiving surface and the trailing surface and being accessible from the tooth-receiving surface and the trailing surface. The present disclosure also concerns a cutting disk comprising such a saw tooth holder, a saw tooth holder in combination with a tooth assembly, and a rotary cutting machine comprising such a cutting disk.

The present disclosure concerns a saw tooth holder for a cutting disk of a rotary cutting machine. The saw tooth holder comprises a holder body having a tooth-receiving surface abuttable against a rear surface of a saw tooth of a tooth assembly and a trailing surface, opposed to the tooth-receiving surface, and defining a trailing oblique angle with respect to the tooth-receiving surface. The holder body has a fastener-receiving aperture extending therethrough between the tooth-receiving surface and the trailing surface and being accessible from the tooth-receiving surface and the trailing surface. The present disclosure also concerns a cutting disk comprising such a saw tooth holder, a saw tooth holder in combination with a tooth assembly, and a rotary cutting machine comprising such a cutting disk.

Embodiments of the disclosure relate to a reciprocating saw blade. The reciprocating saw blade includes a body having a first end, a second end spatially disposed from the first end, a spine edge, and a cutting edge opposite to the spine edge. The reciprocating saw blade also includes a plurality of teeth defining a cutting portion of the cutting edge. Each tooth of the plurality of teeth includes a base having a unitary construction with the body. The base is made of a first material having a first hardness. A tip is welded to the base, and the tip is made of a cemented ceramic material having a second hardness that is greater than the first hardness. The cemented ceramic material includes tungsten carbide particles and at least 3 wt % of other particles including one or more cubic carbides.

A circular saw blade includes a disc-shaped base metal having an outer diameter of 200 mm to 500 mm, and a plurality of first tips, and a plurality of second tips alternately arranged along an outer circumference of the base metal. The circular saw blade has a blade thickness about 0.8 mm to 2.0 mm. The first tips and the second tips have cutting edges and a pair of chamfers at both ends of the cutting edges. A first groove and a second groove are formed in a flank so as to extend in a circumferential direction of the cutting edges. The first groove includes a first groove bottom that is deepest in a radial direction at a position of a first distance from a thickness center in a first thickness direction. The second groove has a second groove bottom that is deepest in the radial direction at a position of a second distance from the thickness center in a second thickness direction opposite to the first thickness direction. A sum of the first distance and the second distance is about 0.35 mm or less.

A circular saw blade includes a disc-shaped base metal having an outer diameter of 200 mm to 500 mm, and a plurality of first tips, and a plurality of second tips alternately arranged along an outer circumference of the base metal. The circular saw blade has a blade thickness about 0.8 mm to 2.0 mm. The first tips and the second tips have cutting edges and a pair of chamfers at both ends of the cutting edges. A first groove and a second groove are formed in a flank so as to extend in a circumferential direction of the cutting edges. The first groove includes a first groove bottom that is deepest in a radial direction at a position of a first distance from a thickness center in a first thickness direction. The second groove has a second groove bottom that is deepest in the radial direction at a position of a second distance from the thickness center in a second thickness direction opposite to the first thickness direction. A sum of the first distance and the second distance is about 0.35 mm or less.

This invention discloses the carbide saw blade and the welding method thereof. The method includes: S1, heating the carbide tool bit, the saw blade base, the welding wire and the welding flux that well-placed; S2, at temperature 760? C.-840? C., spreading the melted welding wire to the gap between the carbide tool bit and the saw blade base by using the wetting action of the welding flux; S3, cooling to obtain a preliminary welding body, when the temperature of the preliminary welding body is lower than 350? C., the preliminary welding body will be processed to first tempering; S4, within 1-3 hours after first tempering, second tempering the preliminary welding body to obtain carbide saw blade; second tempering process is performed in a sealed container, and in this container the temperature of each spatial location is consistent. This invention solves the problems of breaking of the tooth holder during cutting and tensile stress cracking between the adjacent sawteeth.