Abstract: A sawblade is manufactured by a swaging or cold-forging operation so as to be either complete with teeth and relief indentations on the side surfaces of a blade body or by producing a sawblade body with a seat wherein a separately formed toothed insert may be fastened, e.g. by soldering, brazing or welding.

Abstract: A method of manufacturing a circular saw blade comprises advancing through a press tool having multiple blanking stations, a blank, in strip form of thickness required for the blades and of width slightly greater than the diameter required for the blades, and having the physical characteristics required of the blades, effecting a first blanking operation at a first blanking station to blank out leading edges of non-consecutive teeth simultaneously with trailing edges of preceding adjacent teeth, advancing the strip to at least one subsequent blanking station and blanking out identical edges of some or all of the remaining teeth, advancing the strip to a further blanking station and forming outer edges on some or all of the teeth and blanking a center hole and a drive hole at one of the stations.

Abstract: A new tooth form for a welded edge band saw, which has a positive rake angle and an enlarged gullet space, while maintaining a large wedge angle, is disclosed. The tooth geometry has a wedge angle greater than positive rake tooth forms of previous design and a gullet space comparable to a zero rake angle standard tooth form. The new tooth form provides an improved cutting rate and useful life and it is particularly advantageous in connection with high speed heavy duty band saw apparatus.

Abstract: The article, such as a circular saw tool or a gear wheel, has a visco-elastic synthetic-resin damping layer between, on the one hand, a portion of the body of the article which is integral with, or securely attached to, a work region adapted to interact with another article, and, on the other hand, a counter-element which extends parallel thereto. The damping layer is arranged in the interior of the article in a region covered by an outer member integral with or securely connected to the body. The parts between which the damping layer lies are connected together by the damping layer in a manner which permits shear stresses to occur in the damping layer.

Abstract: A saw blade having improved metal cutting characteristics in which the tip of each tooth is formed to provide a primary rake face extending from the tip of the tooth for a distance of 0.007 to 0.020 inch and having a positive rake angle of 12.degree. to 25.degree., a secondary rake face extending from the primary rake face to the gullet of the tooth and having a positive rake angle less than 12.degree., a primary end relief surface extending from the tip of the tooth for a distance of 0.007 to 0.030 inch and forming a relief angle of 10.degree. to 25.degree., and a secondary end relief surface extending from the primary end relief surface to the gullet of the next successive tooth and forming a relief angle greater than the relief angle of the primary end relief surface. The blade can be made by applying a deforming force to the tips of the teeth of a precursor saw blade.

Abstract: The invention provides a method of attaching carbide inserts to the tips of steel saw blades, and other tools. The manufacturing steps include (a) forming a band of discrete carbide inserts attached, in one embodiment, to a foil ribbon of brazing material, (b) holding the insert against the steel saw blade tooth, (c) heating the junction between the insert and steel to melt the brazing material, and (d) forcing the insert into a self-formed seat in the plastic steel. In some embodiments, the foil of brazing material is used primarily for holding, supporting and feeding the carbide inserts to the welding head. The brazing material is primarily vaporized by the welding heat so that little or none of it remains in the weld at the interface between the carbide inset and the steel of the saw blade. This forms a bond which has some attributes of both welding and brazing at a very strong mechanical joint.

Abstract: A blade with teeth whose spacing varies around the periphery has, on at least one side, a cover element and an intermediate visco-elastic layer, in order to reduce noise. A holding element fixed to a support ring holds the cover element on the blade independently of the intermediate layer and allows the layer to perform a damping function subject to thrusting stresses.

Abstract: An improved band saw blade for cutting hard ferrous or non-ferrous articles, wherein the band saw blade comprises an elongated, flexible, continuous ribbon having a back edge and a toothed edge, the ribbon having a sinoidal pattern in the plane of the ribbon, the wavelength and pitch of the ribbon being selected to enhance the cutting of the article but is selected to avoid chatter based on the rate of speed of travel of the ribbon, the pressure applied to the ribbon during the cutting and the average length of the cut to be made in the article to be cut. A method of constructing a band saw blade with a sinoidal pattern including the steps of successively squeezing portions of the saw blade or ribbon alternately near its back edge and near its toothed edge, whereby the blade is formed with a continuous wave pattern.

Abstract: A method of working saw teeth whereby the saw involved is fed to an abrasive wheel for the purpose of grinding the edges of the saw teeth, the surface layer of the edges of each tooth being ground is heated in the course of the grinding process to a temperature approximating to the melting point of the saw material, and the saw is subsequently imparted a pitch-feed movement relative to the abrasive wheel. During the pitch-feed movement each tooth tip heated in the grinding process is bent by bringing the side surface thereof in contact with the shaped surface of a tooth tip supporting element, whereby the teeth of the saw are set, the setting of the saw teeth being performed only in the zone of the tooth tips.

Abstract: A handsaw has a main blade and an auxiliary cutting blade with specialized fingers. The cutting blade is held tautly between two points disposed on opposite ends of the main blade. Interlocking teeth prevent the two blades from springing apart without interfering with the tautness of the cutting blade. The vertical projection of the cross section of the two blades is the same as the vertical projection of one blade alone, so that the two combined saw blades easily follow their own kerf.

Abstract: A saw blade construction and method of forming such blade whereby the ends of a saw blade are abutted into end to end relationship to define an endless saw blade having a series of teeth formed along one edge to define a cutting edge, and having a back edge which is progressively sloped or tapered in opposite directions from an intermediate point on the back edge so that in a cutting operation the saw blade effects a cut along an edge portion of a workpiece on the down feed stroke of the blade and a progressive cut on the opposite edge of the workpiece whereby the teeth are rendered self-feeding on the progressive cut of the workpiece. In a modified embodiment the saw blade is formed with a plurality of alternate disposed down feed and progressive cutting edges.

Abstract: The circular saw blade of the invention is composed of different materials and consists of three concentric zones, -- an inner zone, intermediate zone and an outer zone, -- welded together. The material of the outer zone is a high-speed steel, the outer and intermediate zones are joined together by, for instance, electron beam welding, while the intermediate and inner zones are joined together by a welding method other than electron beam welding.The present invention relates to the saw art, and is concerned with the provision of an improved circular saw blade.

Abstract: A rotary saw blade is provided with annular recesses on its two side surfaces, with the recess filled with a sound-deadening material such as melted metal. The sound-deadening material is sprayed into the recesses so that the entire saw blade need not be heated to any great degree. A layer of a binding material may also be sprayed into the recesses to increase the adhesion of the layer of melted metal to the rotary saw blade.

Abstract: A method of cold-forming a substantially right-angle final bend in a chisel-type saw-chain cutter link. The method involves the progressive, staged shifting of a bend, and of the inside and outside corners therein, in a cutter blank from a starting, greater-than-right-angle bend line toward an adjacent, substantially parallel, final substantially right-angle bend line. Subsequent to the making of an initial bend in a blank, the making of later shifted bends is accompanied by the flowing of material in the blank toward the region of the later-produced bends.

Abstract: A method of producing cutting teeth for a chain saw each of which has a tooth roof and a base body cranked relative to the tooth roof along a substantially sharp edge. The method includes using as starting material a flat band which at least on one flat side of the flat band has a ridge-shaped projection extending in the longitudinal direction of the flat band. The method further includes cutting the band transverse to its longitudinal axis into sections so that each section has an overall size just sufficient for the formation of a cutting tooth to be formed, while the ridge-shaped projection divides each section into a shorter end portion and a longer end portion. The shorter end portion is bent to form the tooth roof, and the longer end portion is provided with a crank relative to the tooth roof.

Abstract: A method of manufacturing metallic strip which differs in composition across its width includes feeding a cutting tool continuously into the peripheral surface of a rotating workpiece comprising a plurality of cylindrical components of differing composition to produce a continuous strip peeled from the surface of the workpiece, and collecting the peeled strip by winding it under tension around a coiler.

Abstract: The present novel inventive method of grinding the raking surfaces of a blade of a circular saw includes the steps of positioning a rotating frustoconical grinding element in two-directional movable relationship to a fixed plane of reference such as a work bench; positioning the major plane of the circular saw in a position which will permit a tangential approach of the frustoconical grinding element to the raking surfaces of the blade; moving the grinding element into abutment with the raking surface of one tooth of the circular saw; pressing the outer surface of said rotating grinding element against said raking surface; utilizing manual pressure in order to obtain a concave surface having a progression of change of radius in which the tangent angle of said change of radius is between two and ten degrees and abrading said raking surface so as to form a concave configuration therein having a graduated depth terminating at a maximum of 1/32 of an inch measured in relation to lateral, radially directed leading

Abstract: A plurality of individual, pre-formed cutting tips attached to one another in an adjoining series to form an elongate stick of tips for sequential attachment to the teeth or cutting portions of cutting tools. Each tip in the stick has a commonly oriented contact surface for attachment to the cutting tool, and a separate pre-formed cutting edge that forms the cutting edge of the tool once the tip has been attached. Attachment of a tip to a cutting tool is accomplished by positioning the contact surface of the lead tip in a stick proximate the tool, and severing the connection between the tip and the remainder of the stick. The tips forming the stick are preferably attached to one another by a meltable adhesive spread over their respective contact surfaces, such adhesive having a melting point lower than that of the tips. The respective tips in the stick are operatively connected to separate teeth or tools by the same adhesive.

Abstract: A cup-shaped wheel having an abrasive rim is employed to grind the teeth of a circular saw to an improved contour. Only point or edge contact takes place between the abrasive rim and the tooth. This technique is preferably utilized in conjunction with triple-chip type circular saws of the sort used to cut metals such as steel. The contour imparted to the cutting surface of the tooth comprises a section of an elliptical cylinder and exhibits improved steel cutting characteristics when compared to prior art multi-faceted saw teeth. Since only edge contact takes place between the abrasive rim and the tooth, the wheel is essentially self-dressing.

Abstract: A plurality of individual, pre-formed cutting tips attached to one another in an adjoining series to form an elongate stick of tips are utilized for sequentially attaching the tips to the teeth or cutting portions of cutting tools. Each tip in the stick has a commonly oriented contact surface for attachment to the cutting tool, and a separate pre-formed cutting edge that forms the cutting edge of the tool once the tip has been attached. Attachment of a tip to a cutting tool is accomplished by positioning the contact surface of the lead tip in a stick proximate the tool, and severing the connection between the tip and the remainder of the stick. The tips forming the stick are preferably attached to one another by a meltable adhesive spread over their respective contact surfaces, such adhesive having a melting point lower than that of the tips. The respective tips in the stick are operatively connected to separate teeth or tools by the same adhesive.

Abstract: A method wherein the dynamic effect is applied to a zone on the edge of the saw tooth flank located at a certain distance from the tooth point which makes it possible to set the saw teeth after hardening their points to 60 HRc. The impact elements of the device for the realization of said method have surfaces acting on the edges of the saw tooth flanks, inclined to the plane of the saw cross section and having a convex curvilinear profile in cross section.

Abstract: A grinder accessory for use with a bench grinder including a uniquely designed three element structure and associated connecting and releasing means for attaching the accessory to the grinder when chain saw blades are to be sharpened while permitting quick removal of the grinder accessory to permit other uses of the grinder. The system includes a grinder mounting bracket, a bushing mount with a lower bracket mounting extension, and a dog latched chain saw positioning and holding tool. The mounting bracket bolts directly to the frame of the bench grinder using a screw and locknut inserted into a pre-existing hole in the grinder frame with the bushing mount located along a channel in the bracket at a position suitable to permit engagement of the grinder wheel with the cutting edges of the blades of the chain saw.

Abstract: A cup-shaped wheel having an abrasive rim is employed to edge grind the teeth of a circular saw to an improved contour. The grinding wheel is carried by a slide means which brings the grinding wheel into contact with the teeth of the circular saw. The slide means is also adapted to accomodate a drive motor for rotating the grinding wheel. An adjustble mechanism is incorporated into the slide means to adjust the angle of attack of the grinding wheel. In this manner the contour of the working surface generated can be varied at will. Since only point or edge contact takes place between the abrasive rim and the tooth, the wheel is essentially self-dressing. The method and apparatus are specifically adapted to grinding the carbide tip teeth of steel cutting saw blades. The relative movement of the machine elements is automatically controlled by a programmed electronic unit which, in turn, controls a system of hydraulic pistons.

Abstract: A circular saw includes a plurality of teeth having an improved metal breaking geometry. The saw is especially adapted to cut hard, brittle materials such as steel bars and the like. The saw teeth are generated by a cup shaped grinding wheel having a grinding face on its inside surface. By bringing the rotating inner surface of the grinding wheel into contact with each tooth, it is possible to produce a working surface on each tooth which exhibits improved metal breaking and self-cleaning characteristics. The working surface thus generated is characterized by the fact that all points on the working surface which lie in the same given plane perpendicualr to the axis of rotation of the grinding wheel are equally distant from any given point on that axis. The working surface is preferably a section of a cylinder or cone, but may exhibit irregularities or discontinuities for special applications.

Abstract: A method and construction of a saw blade whereby the ends of a saw blade are secured to define an endless saw blade construction which has a series of cutting teeth progressively arranged from leading to trailing end so that the respective teeth are rendered self-feeding. Each cutting tooth is formed with a relatively wide root which is inclined to define a clearance angle of 10.degree. to 15.degree..

Abstract: A method employing a reciprocating feed of a band saw to an abrasive wheel and a pitch feed of the saw to the abrasive wheel. The saw is positioned so that during a part of the pitch feed the portion of the tooth back edge adjacent to the tooth tip comes into contact with one shaped surface of a supporting element, whereby the saw is retarded and at the same time the portion of the tooth edge is strengthened and planished. During the remaining part of the pitch feed the portion of the tooth front edge adjacent to the tooth tip makes contact with the other shaped surface of the supporting element, whereby the portion of the tooth front edge is strengthened and planished. In the machine for carrying this method into effect the supporting element located after the abrasive wheel, as viewed in the direction of the pitch feed, has two shaped surfaces disposed in relation to each other so as to form a wedge.

Abstract: A method for producing a multi-layer metal strip comprising at least one strip of a high-speed steel alloy which in addition to iron and normal impurities contains 0.60-1.30 % C, 3.0-5.0 % Cr, 1.0-10 % Mo, 1.0-20 % W, up to 12 % Co and 0.5-4.0 % V, and which is cemented onto a carrier strip by electron-beam welding. In order to attain a good flow of the molten metal in the gap between the high-speed steel strip and the carrier strip 0.005-0.5 % Ce is added to the high-speed steel alloy. Ce can be added as a "misch metal" and may then contain the lanthanides normally present in misch metal. The multi-layer metal strip thus produced is used in the manufacture of hacksaws.

Abstract: The present invention relates to a method in the production of rotatable tools, such as saw blades or similar, comprising at least two preferably metallic discs interconnected by means of glue, solder or any other binding means or adhesive wherein spacing members of a uniform overall thickness are disposed between the discs to position the discs parallel to each other and to ensure a uniform layer thickness of the binding means. Said invention also relates to a means to perform the method and to the product achieved by the method.

Abstract: Disclosed herein is a method of forming a cutting link from a generally planar cutting blank, and an apparatus capable of performance in accordance with the method and comprising a stationary die part, means including a first die part movable relative to the stationary part in a first path and operable, in response to movement of the first movable die part relative to the stationary die part, to bend a shank part of the blank relative to a link part of the blank to form a link shank portion into angular relation a cutting link linking portion and to partially bend a toe part of the blank relative to the shank part, and means including a second die part movable in a direction transverse to the first path and relative to the stationary die part and operable, in response to movement of the second die part relative to the stationary die part, to cold flow the toe part to form a link toe portion into angular relation to the link shank portion and into transverse relation to the linking portion.

Abstract: A coated steel product, namely, a cutting instrument such as a band saw blade, in which the body of the blade is of steel, the tooth tip is of impulse hardened steel and the tip is covered with a coating of titanium carbide or refractory metal carbide, the coating metal or compound having been deposited by ion plating onto the surface of the tip. The process through which the cutting tool is produced includes preshaping and sharpening the tool, then ion cleaning the tips, bombarding the tips with ions of the titanium or refractory metal followed by reacting the titanium or refractory metal with a carbon containing chemical or their carbides and then simultaneously subjecting both the coating and the steel tip to a magnetic flux for impulse hardening primarily the steel tip. Other coatings of metal carbides, nitrides, borides and metal compounds are described.

Abstract: A cup-shaped grinding wheel having an abrasive inner rim is brought into grinding contact with a tooth of a circular saw. The angle of attack of the grinding wheel is such that it imparts a second surface to the face of the saw tooth. The second generated surface has a continuous curved contour and a more negative average rake angle than the remaining portion of the face of said tooth. The apparatus and method are especially adapted to grinding the carbide tipped teeth of steel cutting saws but this technique may be used on other saw blades. Movements of the machine elements are automatically governed by a programmed electronic unit which, in turn, controls a system of hydraulic pistons.

Abstract: A method and machine for hammering circular saw blades automatically, to correct uneven distributions of residual stresses, and distortions of the blade surfaces from true planes, so that the blades will run true. This operation has previously only been performed manually, by highly-skilled craftsmen. The saw blade is elastically deflected so that its normally-planar surface lies in a curved surface of a predetermined contour. A proximity sensor passes over the blade to detect deviations of its surface from the predetermined contour, which occur at points of uneven stress distribution or surface distortion. At such points, the blade is arrested and hammered until the fault is corrected.

Abstract: Disclosed herein is a method and apparatus for forming a saw chain cutting link blank including a link portion, a shank portion extending from the link portion, and a toe portion extending from the shank portion, into a saw chain cutting link wherein the shank portion extends from the link portion in angular relation thereto and wherein the toe portion extends from the shank portion in angular relation thereto and in transverse relation to the link portion, the apparatus comprises means for locating a blank relative to a stationary die part, means including a first die part movable in a rectilinear path relative to the stationary die part for bending the shank portion relative to the link portion into the angular relation in response to movement of the first movable die part relative to the stationary die part, means including a second die part movable in the direction of the rectilinear path and relative to the stationary die part for partially bending the toe portion relative to the shank portion in respons

Abstract: In the manufacture of saw blades a metal block is first produced, having a central portion consisting of cutting tool steel. The block is now flattened to form a sheet in which the cutting tool steel forms a central strip. The sheet is now divided to form two blades, each blade having an edge portion consisting of the cutting tool steel. Saw teeth are finally cut in said edge portion.