Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C3/00—Milling particular work; Special milling operations; Machines therefor
  • B23C3/12—Trimming or finishing edges, e.g. deburring welded corners
  • B23C3/126—Portable devices or machines for chamfering edges
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C3/00—Milling particular work; Special milling operations; Machines therefor
  • B23C3/12—Trimming or finishing edges, e.g. deburring welded corners
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C1/00—Milling machines not designed for particular work or special operations
  • B23C1/20—Portable devices or machines; Hand-driven devices or machines
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C5/00—Milling-cutters
  • B23C5/02—Milling-cutters characterised by the shape of the cutter
  • B23C5/04—Plain cutters, i.e. having essentially a cylindrical or tapered cutting surface of substantial length
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C5/00—Milling-cutters
  • B23C5/02—Milling-cutters characterised by the shape of the cutter
  • B23C5/12—Cutters specially designed for producing particular profiles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2210/00—Details of milling cutters
  • B23C2210/04—Angles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2210/00—Details of milling cutters
  • B23C2210/04—Angles
  • B23C2210/0485—Helix angles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2210/00—Details of milling cutters
  • B23C2210/12—Cross section of the cutting edge
  • B23C2210/123—Bevelled cutting edges
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2210/00—Details of milling cutters
  • B23C2210/20—Number of cutting edges
  • B23C2210/208—Number of cutting edges ten
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2220/00—Details of milling processes
  • B23C2220/16—Chamferring
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2265/00—Details of general geometric configurations
  • B23C2265/08—Conical

Definitions

• the present invention relates to a beveling cutter capable of machining a beveled edge on metal using helical shaped cutting blades and discharge grooves which can machine an edge on a metal work piece with more uniformity while eliminating vibration and chattering often experienced when beveling metal with traditional tools.
• the beveling machines of the related art include a drive unit and a power transmission unit in a main body having the function of a handle with a spindle mounted on a head unit, which spindle is rotated by power from the power transmission unit.
• the beveling cutter is mounted on the free end of the spindle.
• a base or guide plate is installed between the spindle and the power
• a cam bearing is attached over the top of the beveling cutter which serves as a depth guide on the opposite side of the bevel.
• the edge of a work piece is aligned with the cutter, the driving unit in the body is driven by an electric or a pneumatic motor, and the driving force rotates the spindle through the power transmission unit. With the rotation of the spindle, the router bit at the free end is rotated and machines a predetermined shape on the work piece.
• the beveling cutter disclosed in the present invention includes a body with a shaft hole formed through the center, a plurality of ten (10) cutter blades extending at regular intervals with a helix angle of 1 to 40 degrees around the shaft hole on the outer circumferential surface of the body while having both sides that are beveling sides, discharge grooves formed longitudinally between the cutter blades to discharge chips produced in beveling, and cutting grooves recessed on the surfaces of the cutter blades.
• a body with a shaft hole formed through the center
• a plurality of ten (10) cutter blades extending at regular intervals with a helix angle of 1 to 40 degrees around the shaft hole on the outer circumferential surface of the body while having both sides that are beveling sides, discharge grooves formed longitudinally between the cutter blades to discharge chips produced in beveling, and cutting grooves recessed on the surfaces of the cutter blades.
• one objective of the present invention is to provide a beveling cutter that can machine a metal surface to a uniform shape and finish with uniform roughness when beveling a work piece.
• Another objective of the present invention is to provide a beveling cutter that can easily discharge chips and scrap originating from the beveling process without generating flames when discharging.
• Another objective of the present invention is to provide a beveling cutter that can prevent damage to cutter blades and reduce load in beveling.
• a beveling cutter may include: a body with a shaft hole formed through the center; a plurality of cutter blades arranged at predetermined distances on the
• Rake angle portions may be formed at an angle ranging from 10 to 20 degrees on a plurality of the cutter blades of the present invention.
• Helical shape cutter blades of the present invention may have a core taper angle ranging from 20 to 30 degrees.
• Honed portions may be formed by honing a side of the radial primary blades of the present invention at an angle ranging from 1 to 45 degrees to prevent the cutter blades from breaking or chattering.
• a beveling cutter such as that in the present invention, since the radial primary relief angle and the radial secondary relief angle range from 5 to 15 degrees and from 16 to 30 degrees, respectively, there are advantages in that it is possible to reduce load generated in the beveling of a work piece and to prevent machining interference and chattering by ensuring a sufficient gap between the work piece and the radial primary blades.
• the horned portion is formed at a side of the radial primary blade, there is the advantage in that it is possible to prevent the cutter blades from breaking and chattering. Further, since the core taper angle of the beveling cutter ranges from 20 to 30 degrees, there is the advantage in that it is possible to increase the stiffness and lifespan of the beveling cutter.
• rake angle portions are formed in the range of angle of 10 to 20 degrees, there is also the advantage in that it is possible to smoothly discharge chips produced in beveling of a work piece, even without specific cutting grooves.
• FIG. 1 is a perspective view showing a beveling cutter according to an embodiment of the present invention
• FIG. 2 is a view illustrating radial primary and secondary relief angles of a cutter blade that is a main part of the present invention
• FIG. 3 is a view illustrating the core taper of a cutter blade that is a main part of the present invention
• FIG. 4 is a side view illustrating a helix angle of a cutter blade that is a main part of the present invention
• FIG. 5 is a view showing an example of the use of the beveling cutter of the present invention.
• FIG. 6 are views showing other embodiments of the beveling cutter of the present invention.
• FIG. 1 is a perspective view showing a beveling cutter according to an embodiment of the present invention
• FIG. 2 is a view illustrating radial primary and secondary relief angles of a cutter blade that is a main part of the present invention
• FIG. 3 is a view illustrating a core taper of a cutter blade that is a main part of the present invention.
• FIG. 4 is a side view illustrating a helix angle of a cutter blade that is a main part of the present invention.
• Beveling cutter 100 in the form of an embodiment of the present invention includes a body 10, a plurality of cutter blades 20 arranged at predetermined distances on the circumferential surface of the body 10, discharge grooves 30 formed longitudinally between the cutter blades 20 to discharge chips produced in beveling, and a key groove 40 formed at a portion inside the body 10.
• the body 10 of the beveling cutter 100 has a shaft hole 5 formed through the center and ten (10) cutter blades 20 arranged at predetermined distances.
• the key groove 40 is formed at a portion inside the body 10. Though not shown in the figures, it is possible to simply mount the beveling cutter on an electric or a pneumatic air tool by inserting a cutter fixing key into the key groove 40 and tightening a cutter fixing bolt in a bolt hole formed at the center of a rotary shaft to firmly fix the beveling cutter.
• the cutter blades 20 are arranged at predetermined distances on the circumferential surface of the bodylO, as shown in FIG. 2, each of which has a radial primary blade 14 with a radial primary relief angle (a) ranging from 5 to 15 degrees and a radial secondary blade 16 with a radial secondary relief angle (b) ranging from 16 to 30 degrees.
• the helix angle (d) of the cutter blades ranges from 5 to 45 degrees.
• the radial primary relief angle (a) is selected to an optimal angle, 5 to
• Honed portions 12 are formed by honing a side of the radial primary blades 14 at an angle ranging from 1 to 45 degrees to prevent the cutter blades from breaking or chattering. Although the honed portions 12 may be 0.05 to 0.2mm wide, it is preferable to make them 0.1 mm wide.
• the radial secondary relief angle (b) is selected to an optimal angle, 16 to 30 degrees, to prevent machining interference and chattering by ensuring a sufficient gap between a work piece 60 and the radial primary blade 14 in beveling.
• a rake angle portion may be formed on the cutter blades 20, at an appropriate angle in the range of 10 to 20 degrees for smooth discharge of chips (not shown) produced when machining a work piece, with chips smoothly discharged even without specifically forming a cutting groove (not shown) on the cutter blades.
• the discharge of chips is induced by forming a cutting groove at a predetermined portion on cutter blades in the related art
• the rake angle portion 25 is formed at an appropriate angle (that is, 10 to 20 degrees) herein so that chips produced in machining (beveling) of work piece 60 are smoothly discharged without flying to the cutter blades or the work piece 60.
• the cutter blades 20 have a core taper angle (c) ranging from 20 to 30 degrees, as shown in FIG. 3 in the present invention.
• the core taper angle (c) an important factor for increasing stiffness and lifespan of the cutter blades 20, is preferably set within the range of angle described above (20 to 30 degrees).
• the beveling angle may be 37.5 degrees and 45 degrees in other embodiments of the present invention, as shown in FIGS. 6 and 7.
• Other factors, including the helix angle, the radial primary relief angle (a), and the radial secondary relief angle (b) are almost similar to those in the embodiment described above and thus the detailed description is not provided below.
• the description below shows how to mount the beveling cutter of the present invention with the configuration described above on a pneumatic air or an electric tool 50 and to bevel a work piece.
• the beveling cutter 100 is mounted, as shown in FIG. 5, by fitting a rotary shaft (not shown) of a pneumatic air or an electric tool 50 into the shaft hole 5 at the center of the body 10, aligning the key groove 40 inside the body 10 with a key groove on the rotary shaft, and inserting a key into the key grooves, and is then fastened by fasteners (the parts [key groove, key, and
• a drive unit (not shown) operates and rotates the cutter blades 20 of the beveling cutter 100.
• Chips (not shown) that are produced by the beveling surfaces of the cutter blades 20 are discharged through the discharge grooves 30 in beveling work piece 60. Further, the cutter blades 20 are generally coated, so that the chips are easily discharged without damaging the surfaces of the cutter blades 20.
• the cutter blades 20 have the honed portion 12 on a side of the radial primary blade 14, the cutter blades 20 can be prevented from breaking and the surface roughness of work piece 60 can be improved in beveling work piece 60. Further, small particles are sintered in the honed portion 12, so that beveling can be implemented by the cutter blades with very sharp lines even in high-speed rotation while the lifespan of the cutter blades 20 can be considerably increased and high-quality surfaces can be achieved.
• the radial primary blade 14 has a radial primary relief angle (a) ranging from 5 to 15 degrees, the load generated in beveling can be reduced. Further, since the radial secondary relief angle (b) of the radial secondary blade 16 connected with the radial primary blade 14 ranges frorh 16 to 30 degrees, a sufficient gap is ensured between work piece 60 and radial primary blade 14 in beveling and thus machining interference and chattering can be prevented.
• the beveling cutter of the present invention is available for various types of beveling including paint edge, weld edge, architectural edge, saddle, countersink, interior edge, straight edges and on automated edge machines.
• the beveling cutter of the present invention is available for all types of metal work including on carbon and stainless steel, on aluminum, iron, on nonferrous and on most exotic metals. Explanations of Letters or Numerals

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Milling Processes (AREA)
• Crushing And Pulverization Processes (AREA)
• Drilling Tools (AREA)

Priority Applications (7)

Applications Claiming Priority (4)

Publications (1)

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Citations (10)

Family Cites Families (10)

• 2012
  • 2012-07-04 KR KR1020120073018A patent/KR101498685B1/ko active Active
• 2013
  • 2013-07-01 BR BR112014033094A patent/BR112014033094A2/pt not_active IP Right Cessation
  • 2013-07-01 JP JP2015520084A patent/JP6432989B2/ja active Active
  • 2013-07-01 ES ES13742534T patent/ES2715993T3/es active Active
  • 2013-07-01 WO PCT/NL2013/000037 patent/WO2014007608A1/en not_active Ceased
  • 2013-07-01 CN CN201380035204.2A patent/CN104520037B/zh active Active
  • 2013-07-01 CA CA2878056A patent/CA2878056C/en active Active
  • 2013-07-01 EP EP13742534.4A patent/EP2869955B1/en active Active
  • 2013-07-01 AU AU2013285686A patent/AU2013285686B2/en active Active

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