A ring forming step includes welding opposite ends of a band saw blade including a body part having a band shape, and a tooth part including a plurality of teeth formed on one side part of the body part, to form a ring shape. A polishing step includes polishing an inner surface, an outer surface, and an end face on a side opposite to the tooth part in the ring-shaped band saw blade subjected to the ring formation. A tip tooth tip forming step includes positioning, after the polishing step, the ring-shaped band saw blade subjected to the ring formation by use of one of the inner surface and the outer surface, and the end face as references, joining a cutting tip to tooth tips of the plurality of teeth by welding, and polishing the joined cutting tip to form a tooth tip shape.

A ring forming step includes welding opposite ends of a band saw blade including a body part having a band shape, and a tooth part including a plurality of teeth formed on one side part of the body part, to form a ring shape. A polishing step includes polishing an inner surface, an outer surface, and an end face on a side opposite to the tooth part in the ring-shaped band saw blade subjected to the ring formation. A tip tooth tip forming step includes positioning, after the polishing step, the ring-shaped band saw blade subjected to the ring formation by use of one of the inner surface and the outer surface, and the end face as references, joining a cutting tip to tooth tips of the plurality of teeth by welding, and polishing the joined cutting tip to form a tooth tip shape.

A saw blade includes a body and a plurality of cutting teeth formed on the body. Each cutting tooth includes a tip at a first end of the cutting tooth, a rake face extending from the tip toward the body, a relief face extending from the tip toward a second end of the cutting tooth and sloping toward the body, and a projection at the second end of the cutting tooth and sloping away from the body. The saw blade also includes a plurality of gullets formed on the body between the plurality of cutting teeth. Each gullet forms an undercut portion between the body and the projection of each cutting tooth.

A saw blade includes a body and a plurality of cutting teeth formed on the body. Each cutting tooth includes a tip at a first end of the cutting tooth, a rake face extending from the tip toward the body, a relief face extending from the tip toward a second end of the cutting tooth and sloping toward the body, and a projection at the second end of the cutting tooth and sloping away from the body. The saw blade also includes a plurality of gullets formed on the body between the plurality of cutting teeth. Each gullet forms an undercut portion between the body and the projection of each cutting tooth.

In a metal cutting circular saw, the cutting edge of a tip has an approximately recessed arc shape, and a recessed breaker portion is formed in a central portion of a rake face below the cutting edge and first side walls are provided on either side of the recessed breaker portion, and a cross-sectionally approximately recessed arc-shaped groove portion continuing to the recessed breaker portion is provided below the recessed breaker portion, second side walls continuing downward from the first side walls are formed on either side of the groove portion, and the second side walls are formed to have a width wider than the width of the first side walls so that angular portions are provided in an opposed manner in lower end portions of the respective first side walls, and the angular portions narrow the lower part of the recessed breaker portion.

In a metal cutting circular saw, the cutting edge of a tip has an approximately recessed arc shape, and a recessed breaker portion is formed in a central portion of a rake face below the cutting edge and first side walls are provided on either side of the recessed breaker portion, and a cross-sectionally approximately recessed arc-shaped groove portion continuing to the recessed breaker portion is provided below the recessed breaker portion, second side walls continuing downward from the first side walls are formed on either side of the groove portion, and the second side walls are formed to have a width wider than the width of the first side walls so that angular portions are provided in an opposed manner in lower end portions of the respective first side walls, and the angular portions narrow the lower part of the recessed breaker portion.

The present invention is part of machine tools that today are widely used in all mechanical workshops, often being designed and built also to perform very specific tasks.

In particular, the present invention relates to the processing of discs for circular saws or saw-disks.

A saw blade includes a body and a plurality of cutting teeth formed on the body. The plurality of cutting teeth include a first cutting tooth having a tip adjacent a first end of the first cutting tooth, a rake face defining a rake face line extending from the tip toward the body at a positive rake angle, and a relief face extending from the tip toward a second end of the first cutting tooth. The saw blade also includes a plurality of gullets formed on the body between the plurality of cutting teeth. The plurality of gullets include a first gullet forming an undercut of the first cutting tooth. At least a portion of the undercut is positioned on a side of the rake face line in a direction opposite a cutting direction of the saw blade.

A saw blade includes a body and a plurality of cutting teeth formed on the body. The plurality of cutting teeth include a first cutting tooth having a tip adjacent a first end of the first cutting tooth, a rake face defining a rake face line extending from the tip toward the body at a positive rake angle, and a relief face extending from the tip toward a second end of the first cutting tooth. The saw blade also includes a plurality of gullets formed on the body between the plurality of cutting teeth. The plurality of gullets include a first gullet forming an undercut of the first cutting tooth. At least a portion of the undercut is positioned on a side of the rake face line in a direction opposite a cutting direction of the saw blade.

The invention relates to a method for welding hard material bodies to teeth of a saw blade, in particular of a band saw blade or circular saw blade, wherein each tooth has a joining surface, and each hard material body has a joining surface. The joining surface of the hard material body can be welded to the joining surface of the tooth. The method has the following steps: bringing each tooth of the saw blade into a working region; guiding each hard material body towards the tooth located in the working region; advancing a welding device into the working region; welding the hard material body to the tooth surface of the tooth located in the working region; and withdrawing the welding device out of the working region. According to the invention, at least one welding introduction attachment which protrudes from the joining surface of the tooth is formed on each tooth or at least one welding introduction attachment which protrudes from the joining surface of the hard material body is formed on each hard material body. The welding introduction attachment is melted upon introducing a welding pulse.