CA2203589A1 - A circular saw blade and a method of manufacturing same - Google Patents
A circular saw blade and a method of manufacturing sameInfo
- Publication number
- CA2203589A1 CA2203589A1 CA 2203589 CA2203589A CA2203589A1 CA 2203589 A1 CA2203589 A1 CA 2203589A1 CA 2203589 CA2203589 CA 2203589 CA 2203589 A CA2203589 A CA 2203589A CA 2203589 A1 CA2203589 A1 CA 2203589A1
- Authority
- CA
- Canada
- Prior art keywords
- saw blade
- annular member
- projection
- circular saw
- axial thickness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D65/00—Making tools for sawing machines or sawing devices for use in cutting any kind of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
- B23D61/02—Circular saw blades
- B23D61/025—Details of saw blade body
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Sawing (AREA)
Abstract
A circular saw blade comprises a flat annular member being provided with teeth at a periphery thereof. The flat annular member has thrusto-conical shape with an inner surface and an outer surface. An annular projection is provided on the outer surface and is disposed radially inside the teeth. The projection has a surface configured as a flat plateau.
Description
CA 02203~89 1997-04-24 A Circular Saw Blade and a Method of Manufacturinq Same FIELD OF THE INVENTION
The present invention relates to the field of circular saw blades, in particular to circular saw blades used for sawing wood.
More specifically, the invention is concerned with a circular saw blade comprising a flat annular member being provided with teeth at a periphery thereof, the flat annular member having a frusto-conical shape.
Still more specifically, the invention is related to a method of manufacturing a circular saw blade comprising pro-viding a plane, flat annular member having teeth at a periph-ery thereof, wherein the method comprises rolling the flat annular member.
BACKGROUND OF THE INVENTION
U.S. patent specification 5,323,670 of the same appli-cant discloses a circular saw blade as used for sawing, sepa-rating or slotting wood or, under a more general aspect, for CA 02203~89 1997-04-24 working on rigid materials having a modulus of elasticity of preferably between 50,000 through 400,000, in particular 100,000 through 160,000 kg/cm2, where the saw blade has a cutting speed in excess of 40 m/s for providing a slot of finite width. Circular saws of the kind specified before are, for example, used for profiling logs, in particular for sepa-rating so-called lateral boards from the remaining center portion of the log.
The circular saw blade of U.S. patent specification 5,323,670 comprises an assembly of a carrier member having a central opening for receiving a drive shaft of a conventional circular saw. The carrier member is configured as a toroidal element and is shaped frusto-conically at the periphery of its lower surface. A relatively thin annular blade is attached to the carrier periphery, wherein when the blade is bolted against the conical or hollow-conical surface, it is automatically converted into a frusto-conical shape. The taper angle is of the order of between 0,1~ and 1~. When the circular saw blade has a total diameter of the order of 700 mm, the afore-mentioned taper angle results in an overall height of the taper at its axis of between 0.6 and 6.0 mm.
For manufacturing the prior art circular saw blade, the thin blade is first produced in a plane shape. The blade is then rolled along circles being concentric to the axis of rotation.
The rolled blade, having still a plane shape during this step of the manufacturing process is then bolted against the conical or hollow-conical surface of the carrier member.
During the bolting the shape flips from its plane shape into CA 02203~89 1997-04-24 the hollow-conical shape corresponding to the carrier member counter surface.
The prior art saw blade has an annular projection on its surface, the projection being radially inside the peripheral saw blade teeth. In a radial sectional view the projection has a triangular cross section. The projection, hence, has a leading edge facing the blade periphery since the projection becomes thicker in a direction towards the axis of rotation.
On its backside, i.e. on the radially inner side, the projec-tion is provided with a stepped transition. This stepped transition is adapted with a m;niml~m clearance to a station-ary deflection or separation element having also a toroidal shape and being arranged concentrical with respect to the carrier member.
By doing so the boards being separated from the log by means of the peripheral teeth first come into contact with the leading edge of the projection and are then guided over the transition to the stationary separation element, thus re-ducing friction between the rotating saw blade and the sepa-rated board. It is well known to make the angle of the sepa-ration element such that the front end of the separated board will come into contact with the leading edge of the projec-tion only during the first contact because after the front end of the separated board running on the separation element, the board is lifted off the projection so that the separated board bridges the distance between the teeth and the separa-tion element without any further contact with the projection.
In the practice of the manufacture of these prior art saw blades one has become aware that the rolling step may be CA 02203~89 1997-04-24 optimized by rolling on a radius of the saw blade being essentially the same as the radius of the projection.
However, if the prior art circular saw blade were rolled along the projection, one would be faced with the following two disadvantages:
First, it presents a technical problem to roll a work-piece along a periphery if the corresponding rolling tool rolls on an inclined surface or comes in contact with a sharp edge of the projection located between the inclined leading edge and the essentially axial stepped transition.
Further, it is necessary to configure the blade in the rolling area sufficiently thick in order to be able to absorb all of the forces as exerted on the blade during rolling.
For, if the exerted rolling forces are too big or the blade is too thin, one runs the risk that the blade will break in the area of its teeth during rolling.
Insofar, one has to bear in mind that it is always an object to make the blade as thin as possible because only a thin blade results in a narrow cutting gap and, hence, to a high efficiency in the exploitation of the wood volume because only a minimllm fraction of the wood is converted into saw dust.
It is, therefore, an object underlying the invention to improve a circular saw blade and a method as specified at the outset such that even very thin circular saw blades may be rolled while using big rolling forces.
CA 02203~89 1997-04-24 SUMMARY OF THE INVENTION
These and other objects are achieved according to the invention by a circular saw blade comprising a flat annular member being provided with teeth at a periphery thereof, the flat annular member having a frusto-conical shape with an inner surface and an outer surface, an annular projection being provided on the outer surface and being disposed radi-ally inside the teeth, the projection having a surface, the surface being configured as a flat plateau.
Further, the object is achieved by a method of manu-facturing a circular saw blade comprising the steps of:
- providing a plane, flat annular member having teeth at a periphery thereof, the flat annular member having a plane lower surface and a plane upper surface;
- providing an annular projection on the plane upper surface radially inside the teeth; and - rolling the annular projection to form a flat plateau surface thereon.
The invention, hence, envisages to broaden the circular saw blade in a radial area, hence generating a rolling sur-face allowing to exert high forces and, hence, tensions on the circular saw blade without generating an uncontrolled distribution of forces and tensions. By appropriately dimen-sioning the projection, one can even make it possible to manufacture the saw blade with one rolling step only by opti-CA 02203~89 1997-04-24 mizing same with respect to the subsequent transformation of the saw blade shape from a plane into a frusto-conical shape.
Therefore, the invention does not necessiate to roll the saw blade in the very thin area outside the annular projection where the teeth are located and where the necessary plastic deformation of the saw blade may no more be obtained in view of the very thin cross section of the saw blade material and without taking the risk of breaking the blade.
According to a preferred embodiment of the circular saw blade of the invention, the plateau has a radial width being three to ten times, preferably six to seven times, as large as the axial thickness of the annular member body radially outside the projection. Further, it is preferred when the axial thickness of the projection is one to three times, preferably one to two times, as large as the axial thickness of the annular member radially outside the projection.
Furtheron it is preferred when the outer radius of the plateau is between 70 % and 90 %, preferably between 80 % and 90 % of the cutting circle radius of the teeth.
These dimensions have turned out to be particularly pre-ferred for conventional materials of saw blades with the further dimensions mentioned at the outset.
In a preferred embodiment of the method of the invention the flat annular member is bolted against a concentric carrier member having a frusto-conical shape whereby the plane flat annular member is converted into a frusto-conical flat annular member.
CA 02203~89 1997-04-24 This measure has the advantage that the taper angle may be exactly defined and reproduced.
Further advantages may be taken from the description and the enclosed drawing.
It goes without saying that the features mentioned before and those that will be explained hereafter may not only be used in the particular given combination but also in other combinations or alone without leaving the scope of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
A preferred embodiment of the invention is shown in the drawing.
Fig. 1 shows a detail of an embodiment of a circular saw blade according to the invention; and Fig. 2 is a sectional view along the line II-II of Fig. 1 in substantially enlarged scale.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
In Fig. 1 reference numeral 10 designates a circular saw blade of the kind as described in U.S. patent specification 5,323,670 or in Canadian patent specification 1,296,602 en-corporated herein by reference. Further details of the circu-lar saw blade may be taken from the afore-referenced cita-tions.
CA 02203~89 1997-04-24 Circular saw blade 10 comprises, inter alia, an annular member 11, being bolted on an annular carrier body having a conical or hollow-conical surface (not shown) when the circu-lar saw blade 10 is assembled. It goes, however, without say-ing that the circular saw blade 10 may also be used without any such carrier body, i.e. consists only of annular mem-ber 11. As an alternative, it is also possible to integrate annular member 11 with any appropriate carrier body.
Annular member 11 has a radial inward region 12 being axially thicker and has a radially outward region 13 being axially thinner. A mounting bore is provided within the cen-ter of thicker region 12. Mounting bore 14 may be used for receiving a drive shaft of a conventional circular saw. The axis of circular saw blade 10 is designated by 15. For the sake of clarity further mounting bores as used for bolting circular saw blade 10 on a carrier body (not shown) are not shown.
The periphery of circular saw blade 10 is provided with teeth of conventional configuration. In Fig. 2 reference numeral 17 indicates a stationary deflection element being likewise configured as an annular body. Deflection element 17 allows to bend separated lateral boards away from the cutting plane, as indicated by arrow 18. The separated lateral board is thus brought out of contact with rotating circular saw blade 10.
A projection 20 is provided on annular member 11 along a circumference inside teeth 16. Projection 20 has a radial outer leading edge 21 having a flat angle of inclination.
CA 02203~89 1997-04-24 Projection 20 on its upper side is configured as a flat plateau 22. On its radial inner side plateau 22 terminates in a stepped transition 23 being directed axially inwardly.
Stepped transition 23 is designed to snugly fit to detection element 17 with as little clearance as possible.
As indicated by an angle a the lower side 30 of annular member 11 has a hollow-concial shape when lower side 30 is in its assembled condition. Angle a may be between 0.1~ and about 1~, as mentioned above.
In Fig. 1 the cutting circle radius of teeth 16 is iden-tified by rl whereas the radius of the edge at the transition from leading edge 21 to plateau 22 is designated by r2. The radial width of plateau 22 is B, the thickness or elevation of projection 20 over annular member 11 is D. The thickness of annular member 11 radially outside projection 20 is desig-nated by d.
In a preferred embodiment of the invention the cutting circle radius rl is, for example, 350 mm. Thickness d is in the order of 1.5 mm.
Starting from these absolute values it is a preferred embodiment of the invention when the radial width B of plateau 22 is about three to ten times as large, preferably six to seven times as large as axial thickness d. With the given absolute values radial width B may, for example, be 10 mm.
CA 02203~89 1997-04-24 Axial thickness D of projection 20 above annular member 11 may be one to three times as large, preferably one to two times as large, as axial thickness d of annular member 11 in preferred embodiments of the invention. With the given abso-lute values, axial thickness D may, for example, be 2.5 mm.
Finally, the radial position of projection 20 is pref-erably selected such that outer radius r2 ~f plateau 22 is between 70 % and 90 %, preferably between 80 % and 90 %, of cutting circle radius rl. With the given absolute figures radius r2 may, for example, be 300 mm.
For manufacturing circular saw blade 10 according to the invention, one may proceed in various ways:
In preferred embodiments of the invention circular saw blade 10, as mentioned above, comprises a rigid mechanical carrier body as well as a separate annular member 11. Annular member 11 is manufactured as a plane element together with the described broadened projection. After rolling annular member 11 along projection 20, annular member 11, still having a plane shape, is bolted against a conical or hollow-conical surface on the separate carrier body. During bolting annular member 11 flips from its initial plane shape into the desired hollow-conical final shape.
If, according to another embodiment of the invention circular saw blade 10 consists only of the annular member 11 of annular member 11 is configured integral with a carrier body, the above-mentioned last method step is not required.
Instead, a conical shape of the circular saw blade is already generated during the production of the annular member.
The present invention relates to the field of circular saw blades, in particular to circular saw blades used for sawing wood.
More specifically, the invention is concerned with a circular saw blade comprising a flat annular member being provided with teeth at a periphery thereof, the flat annular member having a frusto-conical shape.
Still more specifically, the invention is related to a method of manufacturing a circular saw blade comprising pro-viding a plane, flat annular member having teeth at a periph-ery thereof, wherein the method comprises rolling the flat annular member.
BACKGROUND OF THE INVENTION
U.S. patent specification 5,323,670 of the same appli-cant discloses a circular saw blade as used for sawing, sepa-rating or slotting wood or, under a more general aspect, for CA 02203~89 1997-04-24 working on rigid materials having a modulus of elasticity of preferably between 50,000 through 400,000, in particular 100,000 through 160,000 kg/cm2, where the saw blade has a cutting speed in excess of 40 m/s for providing a slot of finite width. Circular saws of the kind specified before are, for example, used for profiling logs, in particular for sepa-rating so-called lateral boards from the remaining center portion of the log.
The circular saw blade of U.S. patent specification 5,323,670 comprises an assembly of a carrier member having a central opening for receiving a drive shaft of a conventional circular saw. The carrier member is configured as a toroidal element and is shaped frusto-conically at the periphery of its lower surface. A relatively thin annular blade is attached to the carrier periphery, wherein when the blade is bolted against the conical or hollow-conical surface, it is automatically converted into a frusto-conical shape. The taper angle is of the order of between 0,1~ and 1~. When the circular saw blade has a total diameter of the order of 700 mm, the afore-mentioned taper angle results in an overall height of the taper at its axis of between 0.6 and 6.0 mm.
For manufacturing the prior art circular saw blade, the thin blade is first produced in a plane shape. The blade is then rolled along circles being concentric to the axis of rotation.
The rolled blade, having still a plane shape during this step of the manufacturing process is then bolted against the conical or hollow-conical surface of the carrier member.
During the bolting the shape flips from its plane shape into CA 02203~89 1997-04-24 the hollow-conical shape corresponding to the carrier member counter surface.
The prior art saw blade has an annular projection on its surface, the projection being radially inside the peripheral saw blade teeth. In a radial sectional view the projection has a triangular cross section. The projection, hence, has a leading edge facing the blade periphery since the projection becomes thicker in a direction towards the axis of rotation.
On its backside, i.e. on the radially inner side, the projec-tion is provided with a stepped transition. This stepped transition is adapted with a m;niml~m clearance to a station-ary deflection or separation element having also a toroidal shape and being arranged concentrical with respect to the carrier member.
By doing so the boards being separated from the log by means of the peripheral teeth first come into contact with the leading edge of the projection and are then guided over the transition to the stationary separation element, thus re-ducing friction between the rotating saw blade and the sepa-rated board. It is well known to make the angle of the sepa-ration element such that the front end of the separated board will come into contact with the leading edge of the projec-tion only during the first contact because after the front end of the separated board running on the separation element, the board is lifted off the projection so that the separated board bridges the distance between the teeth and the separa-tion element without any further contact with the projection.
In the practice of the manufacture of these prior art saw blades one has become aware that the rolling step may be CA 02203~89 1997-04-24 optimized by rolling on a radius of the saw blade being essentially the same as the radius of the projection.
However, if the prior art circular saw blade were rolled along the projection, one would be faced with the following two disadvantages:
First, it presents a technical problem to roll a work-piece along a periphery if the corresponding rolling tool rolls on an inclined surface or comes in contact with a sharp edge of the projection located between the inclined leading edge and the essentially axial stepped transition.
Further, it is necessary to configure the blade in the rolling area sufficiently thick in order to be able to absorb all of the forces as exerted on the blade during rolling.
For, if the exerted rolling forces are too big or the blade is too thin, one runs the risk that the blade will break in the area of its teeth during rolling.
Insofar, one has to bear in mind that it is always an object to make the blade as thin as possible because only a thin blade results in a narrow cutting gap and, hence, to a high efficiency in the exploitation of the wood volume because only a minimllm fraction of the wood is converted into saw dust.
It is, therefore, an object underlying the invention to improve a circular saw blade and a method as specified at the outset such that even very thin circular saw blades may be rolled while using big rolling forces.
CA 02203~89 1997-04-24 SUMMARY OF THE INVENTION
These and other objects are achieved according to the invention by a circular saw blade comprising a flat annular member being provided with teeth at a periphery thereof, the flat annular member having a frusto-conical shape with an inner surface and an outer surface, an annular projection being provided on the outer surface and being disposed radi-ally inside the teeth, the projection having a surface, the surface being configured as a flat plateau.
Further, the object is achieved by a method of manu-facturing a circular saw blade comprising the steps of:
- providing a plane, flat annular member having teeth at a periphery thereof, the flat annular member having a plane lower surface and a plane upper surface;
- providing an annular projection on the plane upper surface radially inside the teeth; and - rolling the annular projection to form a flat plateau surface thereon.
The invention, hence, envisages to broaden the circular saw blade in a radial area, hence generating a rolling sur-face allowing to exert high forces and, hence, tensions on the circular saw blade without generating an uncontrolled distribution of forces and tensions. By appropriately dimen-sioning the projection, one can even make it possible to manufacture the saw blade with one rolling step only by opti-CA 02203~89 1997-04-24 mizing same with respect to the subsequent transformation of the saw blade shape from a plane into a frusto-conical shape.
Therefore, the invention does not necessiate to roll the saw blade in the very thin area outside the annular projection where the teeth are located and where the necessary plastic deformation of the saw blade may no more be obtained in view of the very thin cross section of the saw blade material and without taking the risk of breaking the blade.
According to a preferred embodiment of the circular saw blade of the invention, the plateau has a radial width being three to ten times, preferably six to seven times, as large as the axial thickness of the annular member body radially outside the projection. Further, it is preferred when the axial thickness of the projection is one to three times, preferably one to two times, as large as the axial thickness of the annular member radially outside the projection.
Furtheron it is preferred when the outer radius of the plateau is between 70 % and 90 %, preferably between 80 % and 90 % of the cutting circle radius of the teeth.
These dimensions have turned out to be particularly pre-ferred for conventional materials of saw blades with the further dimensions mentioned at the outset.
In a preferred embodiment of the method of the invention the flat annular member is bolted against a concentric carrier member having a frusto-conical shape whereby the plane flat annular member is converted into a frusto-conical flat annular member.
CA 02203~89 1997-04-24 This measure has the advantage that the taper angle may be exactly defined and reproduced.
Further advantages may be taken from the description and the enclosed drawing.
It goes without saying that the features mentioned before and those that will be explained hereafter may not only be used in the particular given combination but also in other combinations or alone without leaving the scope of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
A preferred embodiment of the invention is shown in the drawing.
Fig. 1 shows a detail of an embodiment of a circular saw blade according to the invention; and Fig. 2 is a sectional view along the line II-II of Fig. 1 in substantially enlarged scale.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
In Fig. 1 reference numeral 10 designates a circular saw blade of the kind as described in U.S. patent specification 5,323,670 or in Canadian patent specification 1,296,602 en-corporated herein by reference. Further details of the circu-lar saw blade may be taken from the afore-referenced cita-tions.
CA 02203~89 1997-04-24 Circular saw blade 10 comprises, inter alia, an annular member 11, being bolted on an annular carrier body having a conical or hollow-conical surface (not shown) when the circu-lar saw blade 10 is assembled. It goes, however, without say-ing that the circular saw blade 10 may also be used without any such carrier body, i.e. consists only of annular mem-ber 11. As an alternative, it is also possible to integrate annular member 11 with any appropriate carrier body.
Annular member 11 has a radial inward region 12 being axially thicker and has a radially outward region 13 being axially thinner. A mounting bore is provided within the cen-ter of thicker region 12. Mounting bore 14 may be used for receiving a drive shaft of a conventional circular saw. The axis of circular saw blade 10 is designated by 15. For the sake of clarity further mounting bores as used for bolting circular saw blade 10 on a carrier body (not shown) are not shown.
The periphery of circular saw blade 10 is provided with teeth of conventional configuration. In Fig. 2 reference numeral 17 indicates a stationary deflection element being likewise configured as an annular body. Deflection element 17 allows to bend separated lateral boards away from the cutting plane, as indicated by arrow 18. The separated lateral board is thus brought out of contact with rotating circular saw blade 10.
A projection 20 is provided on annular member 11 along a circumference inside teeth 16. Projection 20 has a radial outer leading edge 21 having a flat angle of inclination.
CA 02203~89 1997-04-24 Projection 20 on its upper side is configured as a flat plateau 22. On its radial inner side plateau 22 terminates in a stepped transition 23 being directed axially inwardly.
Stepped transition 23 is designed to snugly fit to detection element 17 with as little clearance as possible.
As indicated by an angle a the lower side 30 of annular member 11 has a hollow-concial shape when lower side 30 is in its assembled condition. Angle a may be between 0.1~ and about 1~, as mentioned above.
In Fig. 1 the cutting circle radius of teeth 16 is iden-tified by rl whereas the radius of the edge at the transition from leading edge 21 to plateau 22 is designated by r2. The radial width of plateau 22 is B, the thickness or elevation of projection 20 over annular member 11 is D. The thickness of annular member 11 radially outside projection 20 is desig-nated by d.
In a preferred embodiment of the invention the cutting circle radius rl is, for example, 350 mm. Thickness d is in the order of 1.5 mm.
Starting from these absolute values it is a preferred embodiment of the invention when the radial width B of plateau 22 is about three to ten times as large, preferably six to seven times as large as axial thickness d. With the given absolute values radial width B may, for example, be 10 mm.
CA 02203~89 1997-04-24 Axial thickness D of projection 20 above annular member 11 may be one to three times as large, preferably one to two times as large, as axial thickness d of annular member 11 in preferred embodiments of the invention. With the given abso-lute values, axial thickness D may, for example, be 2.5 mm.
Finally, the radial position of projection 20 is pref-erably selected such that outer radius r2 ~f plateau 22 is between 70 % and 90 %, preferably between 80 % and 90 %, of cutting circle radius rl. With the given absolute figures radius r2 may, for example, be 300 mm.
For manufacturing circular saw blade 10 according to the invention, one may proceed in various ways:
In preferred embodiments of the invention circular saw blade 10, as mentioned above, comprises a rigid mechanical carrier body as well as a separate annular member 11. Annular member 11 is manufactured as a plane element together with the described broadened projection. After rolling annular member 11 along projection 20, annular member 11, still having a plane shape, is bolted against a conical or hollow-conical surface on the separate carrier body. During bolting annular member 11 flips from its initial plane shape into the desired hollow-conical final shape.
If, according to another embodiment of the invention circular saw blade 10 consists only of the annular member 11 of annular member 11 is configured integral with a carrier body, the above-mentioned last method step is not required.
Instead, a conical shape of the circular saw blade is already generated during the production of the annular member.
Claims (12)
1. A circular saw blade comprising a flat annular member being provided with teeth at a periphery thereof, said flat annular member having a frusto-conical shape with an inner surface and an outer surface, an annular projection being provided on said outer surface and being disposed radially inside said teeth, said projection having a surface, said surface being configured as a flat plateau.
2. The saw blade of claim 1, wherein said saw blade is configured for sawing wood.
3. The saw blade of claim 1, wherein said flat annular member has a predetermined axial thickness (d) radially outside said annular projection, said plateau having a radial width (B) being three to ten times as large as said axial thickness (d).
4. The saw blade of claim 3, wherein said radial width (B) is six to seven times as large as said axial thickness (d).
5. The saw blade oif claim 1, wherein said flat annular member has a predetermined first axial thickness (d) outside said annular projection and said annular projection has a predetermined second axial thickness (D), said second predetermined axial thickness (D) being one to three times as large as said predetermined first axial thickness (d).
6. The saw blade of claim 5, wherein said second predetermined axial thickness (D) is one to two times as large as said predetermined first axial thickness (d).
7. The saw blade of claim 1, wherein said plateau has an outer radius (r2) and said teeth have a cutting circle radius (r1), said outer radius (r2) being between 70%
and 90% of said cutting circle radius (r1).
and 90% of said cutting circle radius (r1).
8. The saw blade of claim 7, wherein said outer radius (r2) is between 80% and 90% of said cutting circle (r1).
9. A method of manufacuring a circular saw blade comprising the steps of:
- providing a plane, flat annular member having teeth at a periphery thereof, said flat annular member having a plane lower surface and a plane upper surface;
- providing an annular projection on said plane upper surface radially inside said teeth; and - rolling said annular projection to form a flat plateau surface thereon.
- providing a plane, flat annular member having teeth at a periphery thereof, said flat annular member having a plane lower surface and a plane upper surface;
- providing an annular projection on said plane upper surface radially inside said teeth; and - rolling said annular projection to form a flat plateau surface thereon.
10. The method of claim 9, wherein said circular saw blade is configured for sawing wood.
11. The method of claim 9, wherein during said step of rolling said plane flat annular member is converted into a frusto-conical flat annular member, said plane upper surface becoming a frusto-conical outer surface.
12. The method of claim 9, wherein after said step of rolling said flat annular member is bolted against a concentric carrier member having a frusto-conical shape whereby said plane flat annular member is converted into a frusto-conical flat annular member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19617067.2 | 1996-04-29 | ||
| DE1996117067 DE19617067C2 (en) | 1996-04-29 | 1996-04-29 | Circular saw blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2203589A1 true CA2203589A1 (en) | 1997-10-29 |
Family
ID=7792762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2203589 Abandoned CA2203589A1 (en) | 1996-04-29 | 1997-04-24 | A circular saw blade and a method of manufacturing same |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0804989A1 (en) |
| CA (1) | CA2203589A1 (en) |
| DE (1) | DE19617067C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103764328A (en) * | 2011-09-07 | 2014-04-30 | 罗伯特·博世有限公司 | Saw blade for a machine tool |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8534533U1 (en) * | 1985-12-07 | 1986-03-13 | Fries, Berthold, 5920 Bad Berleburg | Circular saw with minimal kerf |
| DE3635318A1 (en) * | 1986-10-17 | 1988-04-28 | Wurster & Dietz Maschf | Method and device for dividing or slitting a rigid material to be cut, in particular wood |
| DE4120217C2 (en) * | 1991-06-19 | 1994-07-07 | Wurster & Dietz Maschf | Circular saw blade, especially for sawing wood |
-
1996
- 1996-04-29 DE DE1996117067 patent/DE19617067C2/en not_active Expired - Fee Related
-
1997
- 1997-04-12 EP EP97106046A patent/EP0804989A1/en not_active Withdrawn
- 1997-04-24 CA CA 2203589 patent/CA2203589A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103764328A (en) * | 2011-09-07 | 2014-04-30 | 罗伯特·博世有限公司 | Saw blade for a machine tool |
| CN103764328B (en) * | 2011-09-07 | 2017-06-09 | 罗伯特·博世有限公司 | For the saw blade of toolroom machine |
| US10799968B2 (en) | 2011-09-07 | 2020-10-13 | Robert Bosch Gmbh | Saw blade for a machine tool |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19617067C2 (en) | 1998-04-09 |
| DE19617067A1 (en) | 1997-10-30 |
| EP0804989A1 (en) | 1997-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1189298A (en) | End cutter head for gear cutting machines, cutters for end cutter heads and method for refacing said cutters | |
| JPS6339707A (en) | Twist drill | |
| JP2000141122A (en) | Cutting insert for rotary cutting tool | |
| WO2001066278A1 (en) | Slitting method, slitting device, and method of manufacturing metal sheet brake shoe by slitting | |
| US4620821A (en) | Cutting device for cutting honeycomb light constructions | |
| CA2203589A1 (en) | A circular saw blade and a method of manufacturing same | |
| US4984614A (en) | Combined saw and chipper head | |
| US4561477A (en) | Woodworking machine and blades therefor | |
| CA2452252C (en) | Pair of saw blades | |
| CA1296602C (en) | Method and device for resawing or slotting rigid material, in particular wood | |
| CA1305647C (en) | Circular saw head | |
| CA2071054C (en) | Circular saw blade and process for the production thereof | |
| US8100156B2 (en) | Cylindrical cutter with helical cutting line | |
| JP5118852B2 (en) | Method and transmission component for manufacturing a flange on a metal blank | |
| US5253686A (en) | Process and device for separating or slitting a rigid material | |
| US4039011A (en) | Chipper saw | |
| US6463659B2 (en) | Multi-stage pulley and production method thereof | |
| CA2054938A1 (en) | Apparatus and Method for Cutting or Slotting Rigid Material, in Particular Wood | |
| KR950700126A (en) | IMPROVEMENTS IN OR RELATING TO ROTARY ATOMISERS | |
| US7210509B2 (en) | Chipping head | |
| CA1151859A (en) | Rotary cutting wheel and method of making | |
| SK150798A3 (en) | Device for the edge trimming of round wood | |
| JPS6137453Y2 (en) | ||
| US20240042533A1 (en) | Tool for cutting processing and use of a cutting insert thereon | |
| SU1077785A1 (en) | Sawing unit of circular saw machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |