US20030024354A1 - Method of making a saw blade - Google Patents
Method of making a saw blade Download PDFInfo
- Publication number
- US20030024354A1 US20030024354A1 US10/253,314 US25331402A US2003024354A1 US 20030024354 A1 US20030024354 A1 US 20030024354A1 US 25331402 A US25331402 A US 25331402A US 2003024354 A1 US2003024354 A1 US 2003024354A1
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- US
- United States
- Prior art keywords
- saw blade
- dimples
- blade
- configuring
- blade body
- 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
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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
- 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
-
- 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
- B23D61/12—Straight saw blades; Strap saw blades
- B23D61/123—Details of saw blade body
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/929—Tool or tool with support
- Y10T83/9319—Toothed blade or tooth therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/929—Tool or tool with support
- Y10T83/9372—Rotatable type
Definitions
- low-profile, discrete protrusions are provided on the blade behind the teeth or cutting edge of a tool, in the form of ridges on the perimeters of indentations (concave dimples) or surfaces on the tops of domes (convex dimples).
- the dimples are on both sides of the blade, although for some applications, protrusions on only one side may be desired.
- the dimples can be concave on one side and convex on the other, the same punching process forming both, or concave or convex dimples can be formed on both sides.
- Concave dimples with ridges at their perimeter can be formed in one or both sides, and convex dimples, without a corresponding concave dimple with a ridge, can be formed in one or both sides.
- the dimples can be of any perimetric configuration, i.e. circular, teardrop shaped, star shaped, polygonal, or even irregularly shaped, for example.
- the dimples should be discrete, spaced from one another, and projecting on the order of 0.005 inches from a planar surface of the blade, although the dimensions of the dimples and their projection from the surface can vary with the application to which they are put.
- the arrangement of the dimples can also be varied.
- the narrowness of the blade dictates that the dimples be small and in either a linear or slightly staggered configuration.
- the width of the blade will permit a wider variety of pattern, or random distribution of dimples.
- the patterns can be somewhat more open because of the greater width of the blade.
- FIG. 1 is a view in side elevation of a saber saw blade in which, by way of illustration, dimples of various types and sizes are shown;
- FIG. 2 is a fragmentary sectional view of a blade showing concave dimples formed directly opposite one another on opposite flat side surfaces of the blade, each with a ridge on its perimeter;
- FIG. 3 is a fragmentary sectional view of a blade showing concave dimples formed on opposite sides but staggered with respect to one another, each with a ridge on its perimeter;
- FIG. 4 is a fragmentary sectional view taken along the line 4 - 4 of FIG. 1;
- FIG. 5 is a fragmentary sectional view of a blade in which ridged concave dimples are provided on one side, and convex dimples, on the other side;
- FIG. 6 is a fragmentary sectional view of a diamond shaped concave dimple taken along the line 6 - 6 of FIG. 1;
- FIG. 7 is a view in side elevation of a jigsaw blade in which a row of dimples has been formed
- FIG. 8 is a view in side elevation of a small saber saw blade in which dimples of various sizes and configurations have been formed;
- FIG. 9 is a bottom edge view of the saw blade shown in FIG. 7, showing the staggered teeth
- FIG. 10 is fragmentary view in side elevation of a hack or band saw blade with dimples of various sizes and shapes in a random pattern
- FIG. 11 is a view in perspective of a hole saw in which dimples have been formed.
- FIG. 12 is a top plan view of a strip used to form the blade of the hole saw of FIG. 11, before it is curled and welded.
- reference numeral 1 indicates a saber saw blade with a flat sided body 2 and teeth 3 along a narrow edge of the body.
- the body of the blade 1 is shown as having formed in it a number of different types of dimples, although normally only one type of dimple would be used on any one blade, spread along the length of the blade.
- FIG. 2 is an illustrative example of some of the dimples in the blade of FIG. 1, wherein concave dimples 4 with ridges 5 along their perimeters are shown as being positioned directly opposite one another on two flat sides of the blade
- the dimples are shown as being staggered with respect to one another on opposite sides of the blade.
- FIG. 1 indicates a saber saw blade with a flat sided body 2 and teeth 3 along a narrow edge of the body.
- the body of the blade 1 is shown as having formed in it a number of different types of dimples, although normally only one type of dimple would be used on any one blade, spread along the length of the blade.
- FIG. 4 which is a fragmentary sectional view taken along the line 4 - 4 , illustrates concave dimples 7 without ridges, with complementary convex dimples 8 , with an outermost smooth domed surface 9 , alternately on one side and the other.
- FIG. 5 illustrates a concave dimple 4 , with a ridge 5 , on one side and a complementary convex dimple 8 , with an outermost smooth surface 9 .
- FIG. 6 is a fragmentary sectional view taken along the line 6 - 6 of FIG. 1, showing a diamond shaped concave dimple 14 with a ridge 15 at its perimeter.
- Reference numeral 17 indicates teardrop shaped dimples, which can be either concave or convex.
- reference numeral 20 indicates a jig saw blade, with a body 21 and teeth 22 .
- Dimples 23 in the body 21 can be of the types shown in FIGS. 2 and 3 or of the types shown in FIGS. 4 and 5. Because the body 21 is so narrow, the dimples 23 are shown as arranged in a straight line.
- FIG. 8 a different type of saber saw is illustrated, in which dimples of various shapes and sizes are arranged in a more or less random pattern.
- FIG. 9 illustrates the teeth of saws provided with dimples, and in particular the jig saw blade of FIG. 7.
- the teeth are staggered in such a way as to produce a kerf at least slightly wider than the protrusion of the dimples, so that normally the protrusions, whether they be convex domes or ridges, do not engage the walls defining the kerf.
- FIG. 10 illustrates a band or hack saw blade 24 , which, merely for purposes of illustration, is shown with dimples 25 of various sizes.
- the dimples on the left part of the blade are shown as arranged in a regular pattern, which would normally be the case.
- the dimples on the right side of the illustration are shown as of various sizes and shapes, arranged in a more or less random pattern, merely to illustrate that possibility.
- FIG. 11 shows a hole saw 26 with a circular top 30 and a cylindrical blade 28 with a body 29 along a free edge of which teeth 31 extend.
- Dimples 32 in the embodiment shown, are convex on the exterior surface of the blade body 29 . Although they are not illustrated, the dimples 32 can have counterpart concave dimples on the inner surface of the cylindrical blade body, which can be of the type shown in FIG. 5, to provide protrusions on the inner surface, as well as on the outer, or the hole saw can be provided with any of the other types of dimples that have been illustrated or described.
- FIG. 12 illustrates the blade 28 of the hole saw 26 as it is made before it is curled and welded at its free ends to form a cylinder as indicated in FIG. 11. This simplifies the formation of the dimples 32 .
- the dimples are preferably made entirely convex, or, if complementary concave dimples are formed in the process of producing the convex dimples, at least making the complementary concave dimples without ridges, to make cleaning easier.
- the dimples are formed with a punch press, which gives the benefit of the cold-working described in application serial number 730,398.
- Pins set in a die plate, can be used to form the concave dimples, and if convex dimples are to be formed, to form the concave dimples on one side and complementary convex dimples on the other at the same time. It is possible to form the dimples in a rolling process either in the course of manufacturing stock of which the blades are made, or subsequently. The dimples can be produced on only one side of a blade that is expected to be used in such a way that only one side is likely to come into contact with a kerf wall. Numerous other variations in the tools of this invention and the method of their manufacture within the scope of the appended claims will become apparent to those skilled in the art in the light of the foregoing disclosure.
Abstract
Description
- This application is a continuation of co-pending U.S. application Ser. No. 09/705,403, filed on Nov. 3, 2000, which in turn is a continuation of co-pending U.S. application Ser. No. 09/136,676, filed on Aug. 19, 1998 (now U.S. Pat. No. 6,145,426), which in turn is a continuation-in-part of U.S. application Ser. No. 08/730,398, filed on Oct. 15, 1996 (now U.S. Pat. No. 5,802,947).
- In Application Serial No. 730,398, of which, this application is a continuation-in-part dimpling of a circular saw blade to produce discrete ridges raised from the plane of the blade is described. The dimpling process produces a cold working effect and the raised edges provide protection against overheating of the blade and scorching of the workpiece when a planar side surface of the blade comes into contact with a wall defining the kerf being produced by the teeth of the blade. The present application is directed to an extension of that principle and technique to linear saw blades and other applications for which those principles and techniques have utility.
- Producing small, discrete, surfaces projecting from a planar surface of jigsaw, hacksaw, or band saw blade, for example, is counter-intuitive. Logically, clearance between the kerf produced by the teeth of the blade, and the body of the blade behind the teeth would be maximized. However, it is a matter of common knowledge that the bodies of jigsaw hacksaw or band saw blades frequently come into contact: with the walls defining the kerf of a workpiece. The provision of low-profile projections from such a blade reduces the surface of contact with the kerf wall.
- In accordance with this invention, generally stated, low-profile, discrete protrusions are provided on the blade behind the teeth or cutting edge of a tool, in the form of ridges on the perimeters of indentations (concave dimples) or surfaces on the tops of domes (convex dimples). Preferably, the dimples are on both sides of the blade, although for some applications, protrusions on only one side may be desired. The dimples can be concave on one side and convex on the other, the same punching process forming both, or concave or convex dimples can be formed on both sides. Concave dimples with ridges at their perimeter can be formed in one or both sides, and convex dimples, without a corresponding concave dimple with a ridge, can be formed in one or both sides. The dimples can be of any perimetric configuration, i.e. circular, teardrop shaped, star shaped, polygonal, or even irregularly shaped, for example.
- The dimples should be discrete, spaced from one another, and projecting on the order of 0.005 inches from a planar surface of the blade, although the dimensions of the dimples and their projection from the surface can vary with the application to which they are put.
- The arrangement of the dimples can also be varied. For example, on a jigsaw blade, the narrowness of the blade dictates that the dimples be small and in either a linear or slightly staggered configuration. In a saber saw, band saw or hack saw, the width of the blade will permit a wider variety of pattern, or random distribution of dimples. In a hole saw, pruning saw, hand saw, or bow saw, for example, the patterns can be somewhat more open because of the greater width of the blade.
- In the drawings, FIG. 1 is a view in side elevation of a saber saw blade in which, by way of illustration, dimples of various types and sizes are shown;
- FIG. 2 is a fragmentary sectional view of a blade showing concave dimples formed directly opposite one another on opposite flat side surfaces of the blade, each with a ridge on its perimeter;
- FIG. 3 is a fragmentary sectional view of a blade showing concave dimples formed on opposite sides but staggered with respect to one another, each with a ridge on its perimeter;
- FIG. 4 is a fragmentary sectional view taken along the line4-4 of FIG. 1;
- FIG. 5 is a fragmentary sectional view of a blade in which ridged concave dimples are provided on one side, and convex dimples, on the other side;
- FIG. 6 is a fragmentary sectional view of a diamond shaped concave dimple taken along the line6-6 of FIG. 1;
- FIG. 7 is a view in side elevation of a jigsaw blade in which a row of dimples has been formed;
- FIG. 8 is a view in side elevation of a small saber saw blade in which dimples of various sizes and configurations have been formed;
- FIG. 9 is a bottom edge view of the saw blade shown in FIG. 7, showing the staggered teeth;
- FIG. 10 is fragmentary view in side elevation of a hack or band saw blade with dimples of various sizes and shapes in a random pattern;
- FIG. 11 is a view in perspective of a hole saw in which dimples have been formed; and;
- FIG. 12 is a top plan view of a strip used to form the blade of the hole saw of FIG. 11, before it is curled and welded.
- Corresponding reference numerals will be used throughout the several figures of the drawings.
- The following detailed description illustrates the invention by way of example and not by way of limitation. This description will clearly enable one skilled in the art to make and use the invention, and describes several embodiments, adaptations, variations, alternatives and uses of the invention, including what we presently believe is the best mode of carrying out the invention.
- Referring to FIG. 1 of the drawings, reference numeral1 indicates a saber saw blade with a flat
sided body 2 andteeth 3 along a narrow edge of the body. Merely by way of illustration, the body of the blade 1 is shown as having formed in it a number of different types of dimples, although normally only one type of dimple would be used on any one blade, spread along the length of the blade. FIG. 2 is an illustrative example of some of the dimples in the blade of FIG. 1, whereinconcave dimples 4 withridges 5 along their perimeters are shown as being positioned directly opposite one another on two flat sides of the blade In FIG. 3, the dimples are shown as being staggered with respect to one another on opposite sides of the blade. FIG. 4, which is a fragmentary sectional view taken along the line 4-4, illustratesconcave dimples 7 without ridges, withcomplementary convex dimples 8, with an outermost smooth domed surface 9, alternately on one side and the other. FIG. 5 illustrates aconcave dimple 4, with aridge 5, on one side and a complementary convex dimple 8, with an outermost smooth surface 9. FIG. 6 is a fragmentary sectional view taken along the line 6-6 of FIG. 1, showing a diamond shapedconcave dimple 14 with aridge 15 at its perimeter.Reference numeral 17 indicates teardrop shaped dimples, which can be either concave or convex. - Referring to FIG. 7,
reference numeral 20 indicates a jig saw blade, with abody 21 andteeth 22.Dimples 23 in thebody 21 can be of the types shown in FIGS. 2 and 3 or of the types shown in FIGS. 4 and 5. Because thebody 21 is so narrow, thedimples 23 are shown as arranged in a straight line. - In FIG. 8, a different type of saber saw is illustrated, in which dimples of various shapes and sizes are arranged in a more or less random pattern.
- FIG. 9 illustrates the teeth of saws provided with dimples, and in particular the jig saw blade of FIG. 7. The teeth are staggered in such a way as to produce a kerf at least slightly wider than the protrusion of the dimples, so that normally the protrusions, whether they be convex domes or ridges, do not engage the walls defining the kerf.
- FIG. 10 illustrates a band or hack saw blade24, which, merely for purposes of illustration, is shown with
dimples 25 of various sizes. The dimples on the left part of the blade are shown as arranged in a regular pattern, which would normally be the case. The dimples on the right side of the illustration are shown as of various sizes and shapes, arranged in a more or less random pattern, merely to illustrate that possibility. - FIG. 11 shows a hole saw26 with a
circular top 30 and acylindrical blade 28 with a body 29 along a free edge of whichteeth 31 extend.Dimples 32, in the embodiment shown, are convex on the exterior surface of the blade body 29. Although they are not illustrated, thedimples 32 can have counterpart concave dimples on the inner surface of the cylindrical blade body, which can be of the type shown in FIG. 5, to provide protrusions on the inner surface, as well as on the outer, or the hole saw can be provided with any of the other types of dimples that have been illustrated or described. - FIG. 12 illustrates the
blade 28 of the hole saw 26 as it is made before it is curled and welded at its free ends to form a cylinder as indicated in FIG. 11. This simplifies the formation of thedimples 32. - It will be apparent to those skilled in the art that the dimpling can be applied to a wide variety of tools beyond those specifically illustrated, as has been indicated heretofore. In a toothless blade, particularly a food slicing blade, the dimples are preferably made entirely convex, or, if complementary concave dimples are formed in the process of producing the convex dimples, at least making the complementary concave dimples without ridges, to make cleaning easier. Preferably, in every case, the dimples are formed with a punch press, which gives the benefit of the cold-working described in application serial number 730,398. Pins, set in a die plate, can be used to form the concave dimples, and if convex dimples are to be formed, to form the concave dimples on one side and complementary convex dimples on the other at the same time. It is possible to form the dimples in a rolling process either in the course of manufacturing stock of which the blades are made, or subsequently. The dimples can be produced on only one side of a blade that is expected to be used in such a way that only one side is likely to come into contact with a kerf wall. Numerous other variations in the tools of this invention and the method of their manufacture within the scope of the appended claims will become apparent to those skilled in the art in the light of the foregoing disclosure.
- As various changes could be made in the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Claims (16)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/253,314 US20030024354A1 (en) | 1996-10-15 | 2002-09-24 | Method of making a saw blade |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/730,398 US5802947A (en) | 1996-10-15 | 1996-10-15 | Dimpled circular saw blade |
US09/136,676 US6145426A (en) | 1996-10-15 | 1998-08-19 | Dimpling |
US09/705,403 US6532855B1 (en) | 1996-10-15 | 2000-11-03 | Saw blade having dimples formed by process of deforming blade body |
US10/253,314 US20030024354A1 (en) | 1996-10-15 | 2002-09-24 | Method of making a saw blade |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/705,403 Continuation US6532855B1 (en) | 1996-10-15 | 2000-11-03 | Saw blade having dimples formed by process of deforming blade body |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030024354A1 true US20030024354A1 (en) | 2003-02-06 |
Family
ID=24935174
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/730,398 Expired - Lifetime US5802947A (en) | 1996-10-15 | 1996-10-15 | Dimpled circular saw blade |
US09/136,676 Expired - Lifetime US6145426A (en) | 1996-10-15 | 1998-08-19 | Dimpling |
US09/705,403 Expired - Lifetime US6532855B1 (en) | 1996-10-15 | 2000-11-03 | Saw blade having dimples formed by process of deforming blade body |
US10/253,314 Abandoned US20030024354A1 (en) | 1996-10-15 | 2002-09-24 | Method of making a saw blade |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/730,398 Expired - Lifetime US5802947A (en) | 1996-10-15 | 1996-10-15 | Dimpled circular saw blade |
US09/136,676 Expired - Lifetime US6145426A (en) | 1996-10-15 | 1998-08-19 | Dimpling |
US09/705,403 Expired - Lifetime US6532855B1 (en) | 1996-10-15 | 2000-11-03 | Saw blade having dimples formed by process of deforming blade body |
Country Status (11)
Country | Link |
---|---|
US (4) | US5802947A (en) |
EP (1) | EP0932470B1 (en) |
JP (1) | JP3619256B2 (en) |
CN (1) | CN1077474C (en) |
AU (1) | AU4410797A (en) |
BR (1) | BR9712301A (en) |
CA (1) | CA2267231C (en) |
DE (1) | DE69731304T2 (en) |
NZ (1) | NZ335169A (en) |
TW (1) | TW368445B (en) |
WO (1) | WO1998016343A1 (en) |
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US20060130628A1 (en) * | 2004-12-22 | 2006-06-22 | Markus Rompel | Tooth form design for reciprocating saw blade |
US7225714B2 (en) | 2004-12-22 | 2007-06-05 | Black & Decker Inc. | Tooth form design for reciprocating saw blade |
US7658136B2 (en) * | 2004-12-22 | 2010-02-09 | Black & Decker Inc. | Hole saw blade |
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US10226829B2 (en) | 2011-08-04 | 2019-03-12 | Milwaukee Electric Tool Corporation | Reciprocating saw blade |
US9475141B2 (en) | 2011-08-04 | 2016-10-25 | Milwaukee Electric Tool Corporation | Reciprocating saw blade |
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Also Published As
Publication number | Publication date |
---|---|
CA2267231A1 (en) | 1998-04-23 |
WO1998016343A1 (en) | 1998-04-23 |
NZ335169A (en) | 2001-02-23 |
US5802947A (en) | 1998-09-08 |
AU4410797A (en) | 1998-05-11 |
DE69731304D1 (en) | 2004-11-25 |
US6532855B1 (en) | 2003-03-18 |
JP3619256B2 (en) | 2005-02-09 |
BR9712301A (en) | 2000-01-25 |
JP2001502251A (en) | 2001-02-20 |
CA2267231C (en) | 2003-09-16 |
EP0932470A1 (en) | 1999-08-04 |
US6145426A (en) | 2000-11-14 |
CN1233202A (en) | 1999-10-27 |
DE69731304T2 (en) | 2005-11-17 |
EP0932470A4 (en) | 2003-04-02 |
TW368445B (en) | 1999-09-01 |
CN1077474C (en) | 2002-01-09 |
EP0932470B1 (en) | 2004-10-20 |
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