WO2023058346A1 - 丸鋸刃 - Google Patents
丸鋸刃 Download PDFInfo
- Publication number
- WO2023058346A1 WO2023058346A1 PCT/JP2022/031697 JP2022031697W WO2023058346A1 WO 2023058346 A1 WO2023058346 A1 WO 2023058346A1 JP 2022031697 W JP2022031697 W JP 2022031697W WO 2023058346 A1 WO2023058346 A1 WO 2023058346A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tip
- circular saw
- saw blade
- thickness
- base metal
- Prior art date
Links
- 239000010953 base metal Substances 0.000 claims abstract description 55
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 description 26
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000011343 solid material Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 5
- 239000011195 cermet Substances 0.000 description 3
- 239000011295 pitch Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- VNTLIPZTSJSULJ-UHFFFAOYSA-N chromium molybdenum Chemical compound [Cr].[Mo] VNTLIPZTSJSULJ-UHFFFAOYSA-N 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- VZUGBLTVBZJZOE-KRWDZBQOSA-N n-[3-[(4s)-2-amino-1,4-dimethyl-6-oxo-5h-pyrimidin-4-yl]phenyl]-5-chloropyrimidine-2-carboxamide Chemical compound N1=C(N)N(C)C(=O)C[C@@]1(C)C1=CC=CC(NC(=O)C=2N=CC(Cl)=CN=2)=C1 VZUGBLTVBZJZOE-KRWDZBQOSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Images
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
- B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
-
- 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
- B23D61/04—Circular saw blades with inserted saw teeth, i.e. the teeth being individually inserted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
- B27B33/02—Structural design of saw blades or saw teeth
- B27B33/08—Circular saw blades
Definitions
- a circular saw blade is used, for example, for cutting work materials of various metals, and has a plurality of tips attached to its outer periphery.
- a circular saw blade for metal cutting cuts a work material such as a steel material or a non-steel material such as aluminum by forming grooves in the work material.
- the circular saw blade has a disk-shaped base metal and a plurality of tips mounted on the outer periphery of the base metal at predetermined intervals.
- the tip is a hard tip made of cemented carbide or cermet, for example.
- a conventional circular saw blade for cutting metal has a tip.
- the chip is formed thicker than the thickness of the base metal and has a planar side surface.
- the joint portion of the chip that is joined to the base metal protrudes in the thickness direction from the base metal.
- chips are generated at the cutting edge.
- generated chips are stored in tooth chambers provided between circumferentially adjacent tips.
- a breaker is formed on the rake face of the tip.
- the breaker is arc-shaped when viewed from the thickness direction of the chip. Chips produced by the cutting edge are bent like a spiral spring by being fed along the arcuate surface of the breaker. The elastic force of the spring-shaped chips can be used to eject the chips from the tooth chamber of the circular saw blade.
- Circular saw blades for metal cutting are used, for example, to cut pipes, tubes, or solid materials.
- the amount of chips generated per insert turn is greater than when cutting a pipe, tube, or the like.
- the volume of the tooth chamber of the circular saw blade is insufficient for the size of the work material.
- the generated chips may be excessively compressed within the breaker. In such a case, chips may not be successfully discharged from the tooth chamber, resulting in chip clogging. Therefore, the application range of the circular saw blade is limited depending on the cutting conditions such as the size of the work material. Therefore, there is a demand for circular saw blades for metal processing that can be applied to a wide range of work materials that can be cut.
- a circular saw blade for cutting metal includes a disk-shaped base, a tooth chamber that opens radially outward on the outer periphery of the base, and a rear end of the tooth chamber in the rotational direction. It has a recessed tip seat.
- the circular saw blade has a tip attached to the tip seat and protruding radially outward from the base metal.
- the insert has a cutting edge where the rake face and the flank face intersect.
- the blade thickness of the tip is thicker than the thickness of the base metal.
- the chip has a thin-walled portion having a thickness equal to or less than the thickness of the base metal on the radially inner side. The thin portion is positioned within the thickness of the chip sheet in the thickness direction.
- the side surface of the thin portion on the radially inner side of the tip does not protrude in the thickness direction from the base metal. Therefore, chips can be prevented from hitting the radially inner joint portion of the tip, and breakage of the tip can be suppressed. In addition, it is possible to suppress the occurrence of chip clogging at the joint portion on the radially inner side of the tip. Thus, it is possible to suppress the deterioration of the cutting performance due to chip breakage, chip clogging, etc. caused by chips.
- the rake angle between the rake face and the radial line of the base metal is negative. Therefore, the rotational length of the thin portion provided on the radially inner side of the tip can be ensured to be longer than the rotational direction length of the radially outer region of the tip. Therefore, it is possible to secure a large area of the joint portion on the radially inner side of the tip 10 with respect to the tip sheet. As a result, the chip can be prevented from being peeled off from the chip sheet, and the deterioration of the cutting performance can be suppressed.
- the tip has an inner region radially inward of the rotationally forward end of the tip seat.
- the thin portion occupies the entire area of the inner region. Therefore, it is possible to suppress protrusion in the thickness direction in the entire region of the joint portion of the thin portion of the chip, which is likely to be hit by chips. Therefore, chip breakage and chip clogging can be more reliably suppressed in the vicinity of the front end in the rotational direction of the joint portion of the chip.
- the thinned portion has a first surface extending radially inward from the front surface of the tip toward the rear in the direction of rotation.
- the thin portion has a second surface extending rearward in the rotational direction from the first surface.
- the thin portion has a third surface extending radially outward from the rear end of the second surface in the rotational direction.
- the chip has a rake face on the forward side in the rotational direction.
- An arc-shaped breaker is recessed toward the rear in the rotational direction on the radially inner side of the rake face.
- the thin portion can be formed in a convex shape facing radially inward by the first to third surfaces. Therefore, the chip can be firmly attached to the chip sheet. Further, displacement of the tip in the rotational direction with respect to the tip seat is suppressed. The radial length of the radially outer region is ensured to be longer than the thinned portion, and the radius of curvature of the breaker is increased. As a result, it is possible to suppress the occurrence of chip clogging within the breaker. Thus, for example, it is possible to cut solid materials having a diameter larger than those for which conventional circular saw blades are applicable.
- FIG. 2 is a side view of a circular saw blade;
- FIG. 2 is an enlarged side view of part II in FIG. 1; It is the front view seen from the rake face side of the tip. It is a top view seen from the flank side of the chip.
- a circular saw blade 1 for metal working is exemplified.
- a circular saw blade 1 has a disk-shaped base metal 2 and a plurality of tips 10 attached to the outer circumference of the base metal 2 .
- each tip 10 forms a groove in the work material and finally cuts the work material.
- the work material is, for example, steel materials such as carbon steel, general structural rolled steel, chromium molybdenum steel, stainless steel, cast iron, or non-ferrous metals such as aluminum and aluminum alloys, copper and copper alloys.
- the work material is, for example, a tubular tube material or pipe material, a rod-like solid material, or the like.
- a work material is cut to a predetermined length by a circular saw blade 1 .
- the work material is cut at room temperature, for example.
- the base metal 2 has a disk-shaped main body 2a and a substantially circular mounting hole 3 penetrating through the base metal 2 in the thickness direction at the center of the main body 2a.
- a rotating shaft of a circular saw is inserted into the mounting hole 3 .
- the circular saw blade 1 rotates in the circumferential direction of the body portion 2a around the base metal axis 2b.
- a plurality of tips 10 arranged on the outer circumference of the base metal 2 sequentially reach the work material from the front in the rotation direction and cut the work material.
- the outer diameter of the circular saw blade 1 is preferably between 200 mm and 500 mm, for example 285 mm.
- the base metal 2 is made of steel, for example.
- the thickness 2c (see FIG. 3) of the base metal 2 is preferably 0.6-1.8 mm, for example 1.7 mm.
- the base metal 2 has a plurality of protrusions 4 that protrude radially outward from the outer periphery of the main body 2a.
- the plurality of protruding portions 4 are formed at regular pitches 4a in the circumferential direction of the outer circumference of the main body portion 2a.
- a tooth chamber 5 is formed between adjacent protrusions 4 .
- a tip seat 6 that opens radially outward is formed on the projecting portion 4 on the front side in the rotational direction.
- a chip 10 is attached to each chip sheet 6 .
- the circular saw blade 1 preferably has 40 to 200, for example 120, tips 10 .
- the chip 10 has a rectangular box-shaped chip body 10a and a rectangular box-shaped thin portion 15 provided radially inside the chip body 10a.
- the chip body 10a has a radial height 10f of 2.0 mm, for example.
- the chip body 10a has a rake face 12 on the forward side in the rotational direction and a flank face 13 on the radially outer side.
- a cutting edge 11 is formed at the intersection of the rake face 12 and the flank face 13 .
- the cutting edge 11 extends in the thickness direction with a blade thickness 10e that is slightly larger than the thickness 2c of the base metal 2.
- the blade thickness 10e is preferably 0.8 mm to 2.0 mm, for example 2.0 mm.
- the tip 10 shown in FIG. 2 is a hard tip made of cemented carbide or cermet, for example.
- Cemented carbide is obtained by, for example, mixing tungsten carbide and cobalt as a binder and sintering the mixture.
- the cermet is obtained by mixing TiN, TiC, TiCN, etc. with cobalt as a binder and sintering the mixture.
- the surface of tip 10 may be coated to improve wear resistance.
- the flank 13 is formed with a groove 13a extending in the circumferential direction.
- the groove 13a extends from the cutting edge 11 at the front end of the flank 13 in the rotational direction to the rear end of the flank 13 in the rotational direction.
- the groove 13a is substantially U-shaped when viewed from the front in the rotational direction of the circular saw blade 1.
- the cutting edge 11 is divided into left and right sides of the groove 13a. Therefore, chips cut from the work material are divided into left and right by the cutting edge 11 divided by the groove 13a.
- the groove 13a is provided at a position offset by a predetermined distance to either the left or the right with respect to the center of the chip 10 in the thickness direction.
- the chip 10 includes a first chip 7 in which the groove 13a is biased to the left with respect to the center in the thickness direction, and a second chip 8 in which the groove 13a is biased to the right with respect to the center in the thickness direction.
- the first chips 7 and the second chips 8 are alternately mounted on the base metal 2 in the circumferential direction.
- the clearance angle 10d between the circumferential tangent of the base metal 2 and the clearance surface 13 is preferably 5° to 15°, for example 10°.
- the rake angle 10c of the rake face 12 inclined with respect to the radial direction of the base metal 2 is preferably -30° to -5°, for example -20°.
- a breaker 12a recessed rearward in the rotational direction is provided in the radially inner region of the rake face 12.
- the breaker 12a is provided over the entire thickness direction of the chip body 10a.
- the breaker 12a has an arc shape when viewed from the thickness direction. Chips cut by the cutting edge 11 are sent to the rake face 12 side and bent like a spiral spring by the breaker 12a. Chips bent by the breaker 12a are ejected from grooves or tooth chambers 5 formed in the work material using elastic force.
- the radius of curvature of the breaker 12a is 50% or more of the height 10f of the tip body 10a, for example 1.2 mm.
- the chip body 10a has a front surface 20 extending radially inwardly of the base metal 2 from the radially inner side of the breaker 12a.
- An angle 12b at which the radially inner side of the breaker 12a intersects the front surface 20 is, for example, 35°.
- An angle 12c between the radial outer surface of the breaker 12a and the extended surface of the rake face 12 is, for example, 30°.
- the chip body 10a has side surfaces 14 at both ends of the flank 13 in the thickness direction.
- the side surface 14 has an angle of 0° to 2° with respect to the radial direction of the base metal 2, for example, an inward inclination angle (side centripetal angle) of 30'. This slight inclination of the side surface 14 reduces the contact area with the work material. Therefore, the cutting resistance of the side surface 14 is reduced. Moreover, since the side surface 14 is inclined so as not to protrude excessively with respect to the cut surface of the work material, the cut surface can be finished smoothly.
- An upper chamfer 14a is formed between the flank 13 and the side 14 as shown in FIGS.
- the upper chamfer 14a is inclined with respect to the flank 13 when viewed from the front in the direction of rotation and has a chamfer angle 14c of, for example, 45°.
- the upper chamfer 14a is formed in a planar shape with substantially the same width in the thickness direction from the front to the rear in the rotation direction of the flank 13 .
- the thickness direction width of the upper chamfer 14a is, for example, 0.05 mm to 0.1 mm.
- the thin portion 15 is provided at least radially inward from the radially inner region of the front surface 20 of the chip 10 .
- tip 10 has an inner region that is inside an arc that passes through the radially inner edge of front face 20 and through the center of base metal 2 .
- the inner area of chip 10 is occupied by thinned portion 15 .
- the thin portion 15 is also positioned radially outward of the inner region.
- the thin portion 15 is located up to a tangent line L2 that passes through the radially inner end of the front surface 20 and touches an arc that passes through the center of the base metal 2 .
- the thin portion 15 has a thickness 15a equal to or less than the blade thickness 10e.
- the thickness 15a is equal to or less than the thickness 2c of the base metal 2, for example, 1.7 mm, which is the same as the thickness 2c.
- the side surface 21 of the thin portion 15 attached to the tip sheet 6 is substantially flush with the side surface of the base metal 2 and does not protrude beyond the side surface of the base metal 2 at least to the left and right. Therefore, the thin portion 15 is attached to the tip sheet 6 within the thickness of the tip sheet 6 in the thickness direction.
- the thin portion 15 has a substantially trapezoidal shape when viewed from the thickness direction.
- the thin portion 15 has a first surface 16, a second surface 17, and a third surface 18, each of which faces radially inward and is planar.
- the first surface 16 extends radially inward from the radially inner region of the front surface 20 toward the rear in the rotational direction.
- the first surface 16 has an inclination angle 16 a with respect to a radial line L ⁇ b>1 extending radially of the base metal 2 .
- the angle of inclination 16a is preferably between 30° and 60°, for example 45°.
- the length in the rotational direction of the first surface 16 is, for example, 20 to 40% of the length in the rotational direction of the chip 10, eg, 0.5 mm.
- the second surface 17 extends rearward in the rotational direction from the rear end of the first surface 16 in the rotational direction, substantially perpendicular to the radial line L1, and substantially parallel to the circumferential line L2. extend to The second surface 17 is arranged at the radially innermost position of the thin portion 15 .
- the thin portion 15 has a radial height 15b that is, for example, 10 to 30% of the height 10f of the chip body 10a.
- the height 15 b is, for example, 0.5 mm and corresponds to the radial distance from the radially inner region of the front surface 20 to the second surface 17 .
- the third surface 18 extends radially outward from the rear end of the second surface 17 in the rotational direction.
- the third surface 18 has an inclination angle 18a with respect to the radial line L1.
- the angle of inclination 18a is preferably between 30° and 60°, for example 45°.
- the length in the rotational direction of the third surface 18 is, for example, 10 to 30% of the length in the rotational direction of the tip 10, eg, 0.3 mm.
- a rotational rear end 18 b of the third surface 18 is positioned radially inward of the radially inner region of the front surface 20 .
- the tip 10 has a planar rear end face 19 extending radially outward from the radially outer side of the third face 18 to the flank face 13 .
- the rear end surface 19 extends substantially parallel to the radial direction line L1.
- the chip sheet 6 is provided with a planar first surface 6b, a second surface 6c, a third surface 6d, and a rear end surface 6e that are formed following the outline of the chip 10.
- the chip 10 is brazed to the first surface 6b, the second surface 6c, the third surface 6d and the rear end surface 6e of the chip sheet 6 with silver brazing or the like.
- the radially inner region of the front face 20 of the tip 10 is arranged at substantially the same position as the front end 6 a of the tip seat 6 in the rotational direction.
- the thin portion 15 has side surfaces 21 extending in the radial direction on both sides in the thickness direction.
- a lower chamfer 14b is formed between the radially outer region of the side surface 21 of the thin portion 15 and the radially inner region of the side surface 14 of the chip body 10a.
- the lower chamfer 14b is inclined with respect to the rotation axis direction of the circular saw blade 1 and has a chamfer angle 14d of, for example, 45°.
- the lower chamfer 14b is formed in a planar shape with substantially the same width in the direction of rotation.
- the width of the lower chamfer 14b in the thickness direction is, for example, 0.10 to 0.15 mm.
- the circular saw blade 1 for cutting metal has a disk-shaped base metal 2, a tooth chamber 5 which opens radially outward on the outer periphery of the base metal 2, A recessed tip seat 6 is provided at the rear end of the tooth chamber 5 in the rotational direction.
- a circular saw blade 1 has a tip 10 mounted on a tip seat 6 and protruding radially outward from a base metal 2 .
- the insert 10 has a cutting edge 11 where a rake face 12 and a flank face 13 intersect. Blade thickness 10 e of tip 10 is thicker than thickness 2 c of base metal 2 .
- the chip 10 has a thin portion 15 having a thickness equal to or smaller than the thickness 2c of the base metal 2 on the radially inner side. The thin portion 15 is positioned within the thickness of the chip sheet 6 in the thickness direction.
- the side surface 14 of the thin portion 15 on the radially inner side of the tip 10 is formed so as not to protrude beyond the base metal 2 in the thickness direction. Therefore, chips can be prevented from hitting the radially inner joint portion of the tip 10 , and breakage of the tip 10 can be suppressed. Moreover, it is possible to suppress the occurrence of chip clogging at the joint portion on the radially inner side of the tip 10 . Thus, it is possible to suppress the deterioration of the cutting performance due to chipping of the tip 10 caused by chips, clogging of chips, and the like.
- the rake angle 10c between the rake face 12 and the radial line L1 of the base metal 2 is negative.
- the rake face 12 extends radially inward and rotationally from the cutting edge 11 . Therefore, the length in the rotational direction of the thin portion 15 provided on the radially inner side of the tip 10 can be ensured to be longer than the length in the rotational direction of the radially outer region of the tip 10 . Therefore, it is possible to ensure a large area of the joint portion on the radially inner side of the tip 10 with respect to the tip sheet 6 . As a result, it is possible to prevent the chip 10 from being detached from the chip sheet 6, thereby suppressing deterioration in cutting performance.
- the tip 10 has an inner region radially inside the front end 6a of the tip seat 6 in the rotational direction.
- the thin portion 15 occupies the entire area of the inner area. Therefore, it is possible to suppress protrusion in the thickness direction in the entire region of the joint portion of the thin portion 15 of the tip 10, which is likely to be hit by chips. Therefore, it is possible to more reliably prevent chipping of the tip 10 and chip clogging in the vicinity of the front end in the rotation direction of the joint portion of the tip 10 .
- the thin portion 15 has a first surface 16 extending radially inward from the radially inner side of the front surface 20 toward the rear in the rotational direction.
- the thin portion 15 has a second surface 17 extending rearward in the rotational direction from the first surface 16 .
- the thin portion 15 has a third surface 18 extending radially outward from the rear end of the second surface 17 in the rotational direction.
- the insert 10 has a rake face 12 on the front side in the rotational direction.
- An arcuate breaker 12a is formed radially inwardly of the rake face 12 toward the rear in the rotational direction.
- the first surface 16, the second surface 17, and the third surface 18 can form the thin portion 15 in a convex shape facing radially inward. Therefore, the tip 10 can be firmly attached to the tip sheet 6 . Moreover, displacement of the tip 10 in the rotational direction with respect to the tip seat 6 is suppressed.
- the radial length (height 10f) of the radially outer region is ensured to be longer than the thin portion 15, and the radius of curvature of the breaker 12a is increased. As a result, the chips are not formed into a distorted shape inside the breaker 12a, and the occurrence of chip clogging inside the breaker 12a can be suppressed.
- the number of teeth of the circular saw blade 1 can be increased, and the maximum number of working teeth (the maximum number of teeth in the grooves formed in the work material during cutting) can be increased more than before.
- the maximum number of working teeth was approximately 3.5 teeth for a conventional circular saw blade, but could be increased to 5 teeth for the circular saw blade 1 of the present disclosure.
- a solid material having a larger diameter than the solid material to which the conventional circular saw blade 1 can be applied can be cut.
- the circular saw blade 1 of this embodiment described above can be made to the circular saw blade 1 of this embodiment described above.
- the circular saw blade 1 in which the protruding portions 4 are arranged at regular pitches 4a in the circumferential direction of the base metal 2 is illustrated.
- the pitch 4a may be changed to an uneven interval.
- An example is given of a configuration in which two types of tips 10 (the first tip 7 and the second tip 8) with different lateral positions of the grooves 13a are used to divide the grooves of the workpiece in the horizontal direction for cutting.
- the circular saw blade 1 may have three or more types of tips 10 with different lateral positions of the grooves 13a.
- a V-shaped groove may be provided in the flank surface 13 instead of the U-shaped groove 13a.
- the thickness 2c of the base metal 2 and the thickness 15a of the thin portion 15 are the same, and the chip 10 is mounted on the chip sheet 6 so that the side surface of the base metal 2 and the side surface 21 of the thin portion 15 are flush with each other. exemplified.
- the thickness 15a of the thin portion 15 may be thinner than the thickness 2c of the base metal 2.
- the center of the chip 10 in the thickness direction is left or right with respect to the center in the thickness direction of the base metal 2 as long as the side surface 21 of the thin portion 15 does not exceed the side surface of the base metal 2 in the thickness direction. It may be displaced in either direction.
- a ridgeline where the front surface 20 of the tip 10 and the first surface 16 intersect may be arranged radially outside the front end 6a of the tip seat 6 in the rotational direction.
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Abstract
Description
Claims (5)
- 金属切断用の丸鋸刃であって、
円盤状の台金と、
前記台金の外周で径方向外方に向けて開口する歯室と、
前記歯室の回転方向後端に凹設されたチップシートと、
前記チップシートに装着されて前記台金よりも径方向外方に突出するチップを有し、
前記チップは、すくい面と逃げ面が交差する切れ刃を有し、刃厚は前記台金の厚さよりも厚く、
前記チップは、径方向内側に前記台金の厚さ以下の厚さである薄肉部を有し、前記薄肉部は、厚み方向において前記チップシートの厚み内に位置する丸鋸刃。 - 請求項1に記載の丸鋸刃であって、
前記すくい面のすくい角が負である丸鋸刃。 - 請求項1または2に記載の丸鋸刃であって、
前記チップは、前記チップシートの回転方向前端よりも径方向内側の内側領域を有し、前記内側領域の全領域において前記薄肉部が占めている丸鋸刃。 - 請求項1~3のいずれか1つに記載の丸鋸刃であって、
前記薄肉部は、前記チップの前面から回転方向後方に向けて径方向内方に延出する第1面と、前記第1面から回転方向後方に延出する第2面と、前記第2面の回転方向後端から径方向外方に延出する第3面を有する丸鋸刃。 - 請求項1~4のいずれか1つに記載の丸鋸刃であって、
前記チップは、回転方向前側に前記すくい面を有し、前記すくい面の径方向内側には、回転方向後方に向けて円弧状にブレーカーが凹設されている丸鋸刃。
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CN202280066334.1A CN118055821A (zh) | 2021-10-04 | 2022-08-23 | 圆锯片 |
JP2023552733A JPWO2023058346A1 (ja) | 2021-10-04 | 2022-08-23 |
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JP2021-163255 | 2021-10-04 | ||
JP2021163255 | 2021-10-04 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0231621U (ja) * | 1988-08-20 | 1990-02-28 | ||
JP3895906B2 (ja) | 2000-06-20 | 2007-03-22 | 兼房株式会社 | 金属切断用丸鋸 |
JP2011178138A (ja) * | 2010-03-04 | 2011-09-15 | Koyama Hardware Co Ltd | チップソー |
JP6037776B2 (ja) * | 2012-10-31 | 2016-12-07 | 天龍製鋸株式会社 | 回転鋸の製造方法 |
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2022
- 2022-08-23 JP JP2023552733A patent/JPWO2023058346A1/ja active Pending
- 2022-08-23 CN CN202280066334.1A patent/CN118055821A/zh active Pending
- 2022-08-23 WO PCT/JP2022/031697 patent/WO2023058346A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0231621U (ja) * | 1988-08-20 | 1990-02-28 | ||
JP3895906B2 (ja) | 2000-06-20 | 2007-03-22 | 兼房株式会社 | 金属切断用丸鋸 |
JP2011178138A (ja) * | 2010-03-04 | 2011-09-15 | Koyama Hardware Co Ltd | チップソー |
JP6037776B2 (ja) * | 2012-10-31 | 2016-12-07 | 天龍製鋸株式会社 | 回転鋸の製造方法 |
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