CA2741681A1 - End mill - Google Patents
End mill Download PDFInfo
- Publication number
- CA2741681A1 CA2741681A1 CA2741681A CA2741681A CA2741681A1 CA 2741681 A1 CA2741681 A1 CA 2741681A1 CA 2741681 A CA2741681 A CA 2741681A CA 2741681 A CA2741681 A CA 2741681A CA 2741681 A1 CA2741681 A1 CA 2741681A1
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- CA
- Canada
- Prior art keywords
- land
- nick
- lands
- end mill
- rotation axis
- 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
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- 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
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/34—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools milling cutters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/08—Side or top views of the cutting edge
- B23C2210/088—Cutting edges with a wave form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2220/00—Details of milling processes
- B23C2220/60—Roughing
- B23C2220/605—Roughing and finishing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/31—Diamond
- B23C2226/315—Diamond polycrystalline [PCD]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/37—Fibreglass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
Disclosed is a router end mill which enables prevention of whitening of the cut surface, interlayer separation, and resin fusion during the milling, enables milling of FRP resin by fast rotation for a long time, and has an excellent durability. An odd number of lands (2) extending while meandering are formed by meandering grooves (1) between neighboring meandering grooves (1).
First and second nicks (31, 32) forming apexes and arranged across the land width along a predetermined first direction (al) are formed in each land of at least one pair of neighboring lands out of the odd number of lands (2).
Finishing blades are formed on the other land (23) than the pair of lands out of the odd number of lands (2).
First and second nicks (31, 32) forming apexes and arranged across the land width along a predetermined first direction (al) are formed in each land of at least one pair of neighboring lands out of the odd number of lands (2).
Finishing blades are formed on the other land (23) than the pair of lands out of the odd number of lands (2).
Description
- I -DESCRIPTION
END MILL
Technical Field [0001] The present invention relates to a milling cutter used for cutting a material to be cut such as FRP resin, and more particularly to a flat (router) end mill having a flat tip, or an end mill with a drilling function (including a radius end mill and a ball end mill) having a blade portion at a tip.
Background Art [0002] FRP (fiber-reinforced resin) has a high degree of specific gravity, a high specific modulus, high fatigue strength and high corrosion resistance, and is used as molding resin of aircraft, ships, automobiles, home appliances, and sporting goods. The FRP
generally uses glass fiber as reinforcement fiber (GFRP), and there are also carbon fiber mixed resin (CFRP) and aramid fiber mixed resin (AFRP) having higher strength.
END MILL
Technical Field [0001] The present invention relates to a milling cutter used for cutting a material to be cut such as FRP resin, and more particularly to a flat (router) end mill having a flat tip, or an end mill with a drilling function (including a radius end mill and a ball end mill) having a blade portion at a tip.
Background Art [0002] FRP (fiber-reinforced resin) has a high degree of specific gravity, a high specific modulus, high fatigue strength and high corrosion resistance, and is used as molding resin of aircraft, ships, automobiles, home appliances, and sporting goods. The FRP
generally uses glass fiber as reinforcement fiber (GFRP), and there are also carbon fiber mixed resin (CFRP) and aramid fiber mixed resin (AFRP) having higher strength.
[0003] These various fiber mixed resins are solidified and molded together with mixed fiber, and if the resins are processed by a conventional end mill with a nick (for example, see Patent Document 1), whitening of a cut surface or interlayer delamination occurs, resin deposition during cutting provides rough finished surfaces, or tool life is reduced.
[0004] In particular, for the resin deposition, thermal conductivity of FRP
resin is, for example, about one twentieth of that of carbon steel and extremely lower than that of a metal material. Thus, frictional heat generated in cutting is not dissipated via chip or a material to be cut, but the frictional heat tends to persist in a cutting edge or the material to be cut. At this time, if the "fuzzing" occurs, heat dissipation is further prevented, and frictional heat particularly tends to persist. If the frictional heat persists in cutting, a so-called deposition state occurs in which the FRP resin is melted by heat and welded to a tip of the cutting edge.
The deposition state interferes with a cutting function, thereby providing a rough cut surface.
In cutting of the FRP resin having low thermal conductivity, the deposition state easily occurs, which prevents long-hour cutting of the cutting edge by high speed rotation.
Patent Document 1: Japanese Patent Laid-Open No. 2-198708 Disclosure of the Invention Problems to be Solved by the Invention [0005] The present invention has an object to provide an end mill that prevents whitening of a cut surface and interlayer delamination, prevents resin deposition during cutting, allows long-hour cutting of FRP resin by high speed rotation, and has excellent durability.
Means for Solving the Problems [0006] (1) Specifically, the present invention provides an end mill including a rod-shaped member having a rotation axis S that includes a blade portion on a tip side and a shank portion on a base end side, in which a plurality of helical flutes 1 are formed at predetermined phase intervals around the rotation axis S, the helical flutes helically extending from a tip toward a base end side of the blade portion in a peripheral surface of the rod-shaped member, the plurality of helical flutes I form odd-numbered lands 2 similarly helically extending between adjacent helical flutes 1, wherein in each land that constitutes at least one set of adjacent lands (one or more set of lands including a first land 21 and a second land 22) among the odd-numbered lands 2, a first nick 31 having a nick top 3t with a land width in a predetermined first direction al is formed in the first land 21, and a second nick 32 having a nick top 3t with a land width in a second direction a2 different from the first direction is formed in the second land 22, and a finishing blade 4 is formed in a residual land 23 other than the set of lands among the odd-numbered lands 2.
resin is, for example, about one twentieth of that of carbon steel and extremely lower than that of a metal material. Thus, frictional heat generated in cutting is not dissipated via chip or a material to be cut, but the frictional heat tends to persist in a cutting edge or the material to be cut. At this time, if the "fuzzing" occurs, heat dissipation is further prevented, and frictional heat particularly tends to persist. If the frictional heat persists in cutting, a so-called deposition state occurs in which the FRP resin is melted by heat and welded to a tip of the cutting edge.
The deposition state interferes with a cutting function, thereby providing a rough cut surface.
In cutting of the FRP resin having low thermal conductivity, the deposition state easily occurs, which prevents long-hour cutting of the cutting edge by high speed rotation.
Patent Document 1: Japanese Patent Laid-Open No. 2-198708 Disclosure of the Invention Problems to be Solved by the Invention [0005] The present invention has an object to provide an end mill that prevents whitening of a cut surface and interlayer delamination, prevents resin deposition during cutting, allows long-hour cutting of FRP resin by high speed rotation, and has excellent durability.
Means for Solving the Problems [0006] (1) Specifically, the present invention provides an end mill including a rod-shaped member having a rotation axis S that includes a blade portion on a tip side and a shank portion on a base end side, in which a plurality of helical flutes 1 are formed at predetermined phase intervals around the rotation axis S, the helical flutes helically extending from a tip toward a base end side of the blade portion in a peripheral surface of the rod-shaped member, the plurality of helical flutes I form odd-numbered lands 2 similarly helically extending between adjacent helical flutes 1, wherein in each land that constitutes at least one set of adjacent lands (one or more set of lands including a first land 21 and a second land 22) among the odd-numbered lands 2, a first nick 31 having a nick top 3t with a land width in a predetermined first direction al is formed in the first land 21, and a second nick 32 having a nick top 3t with a land width in a second direction a2 different from the first direction is formed in the second land 22, and a finishing blade 4 is formed in a residual land 23 other than the set of lands among the odd-numbered lands 2.
[0007] With such a configuration, the first nick in the first land 21 and the second nick in the second land 22 that constitutes one set of lands successively perform cutting in different directions or ejection of chip after the cutting, thereby preventing chip from remaining in a material to be cut. The finishing blade 4 in the residual land 23 performs finishing every time the finishing blade 4 passes a surface to be cut in each rotation of the end mill after the first land 21 and the second land 22 pass the surface to perform cutting in different directions and ejection of chip. This provides the same operation and effect as when cutting in two directions is continued while fine finishing is always performed, and provides operation and effect that an increase in frictional heat by cutting is always prevented.
[0008] This prevents "fuzzing" and "roughness in an object to be cut", allows a beautiful finished surface to be more reliably formed, prevents a deposition state caused by a temperature increase, and facilitates long-hour cutting by high speed rotation. This also prevents whitening of a work surface and interlayer delamination of an object to be cut including a plurality of layers.
[0009] The end mill includes the odd-numbered helical flutes 1 and lands to prevent vibration (behavior phenomenon) in high speed rotation as compared to a conventional case including a plurality of helical flutes I and lands. This also contributes to formation of a beautiful finished surface, and prevention of whitening of a work surface and interlayer delamination.
[0010] Conventionally, two steps are required including a cutting step using an end mill having a nick in each direction, and then a finishing step using a mill having a finishing blade 4. On the other hand, with the configuration of the present invention, the cutting step and the finishing step can be performed in one step, thereby eliminating the need for an independent cutting step to increase machining efficiency.
[0011] (2) In the end mill, it is preferable that the first direction al of the nick top 3t of the first nick and the second direction a2 of the nick top 3t of the second nick are axisymmetrically inclined by the same inclination angle toward opposite sides with respect to the rotation axis S.
[0012] Specifically, the nick top 3t of the first nick is formed in the first direction inclined by an inclination angle 0 toward one side with respect to the rotation axis S, and the second direction of the nick top 3t of the second nick is formed in the second direction inclined by the inclination angle 0 toward the other side with respect to the rotation axis S.
[0013] Since the first nick and the second nick are inclined by the same angle symmetrically with respect to the rotation axis S, the first land 21 and the second land 22 have the same forming directions of a contact angle and a clearance angle of an edge on the object to be cut, and cutting with the same efficiency is continuously performed. This causes symmetrical generation and ejection of chip and further prevents fuzzing.
[0014] (3) In any one of the end mills, the finishing blade 4 of at least one residual land 23 is preferably a polycrystalline diamond sintered blade.
[0015] The finishing blade 4 is formed of the polycrystalline diamond sintered blade, thereby increasing a finishing effect, further preventing fuzzing and roughness, and reducing cutting loads on the material to be cut to prevent whitening and interlayer delamination.
[0016] Also, materials having different thermal conductivities are successively brought into contact with the material to be cut, thereby efficiently reducing frictional heat and increasing a prevention effect of a deposition state.
[0017] Further, when a plurality of residual lands 23 are provided, for example, a finishing blade 4 of any one of the residual lands 23 is formed of a polycrystalline diamond sintered blade, and thus finishing blades 4 of different materials are successively brought into contact with the object to be cut, thereby providing different finishing effects of such as coarse finishing and fine finishing.
[0018] (4) In any one of the end mills, the first nick 31 and the second nick 32 each have a shape obtained by so-called relieving in which a height of the nick top 3t from the rotation axis decreases from one end on a rear side in a rotational direction of the land width 2w toward the other end on a front side in the rotational direction. For example, with such a configuration, each nick has, at the nick top 3t, a clearance angle in axial cross section, thereby promoting efficient ejection of chip and further preventing frictional heat from persisting.
[0019] (5) In any one of the end mills, it is preferable that the plurality of helical flutes I
formed in the end mill have the same flute width lw, and are formed in phase positions defined by unequally dividing a peripheral surface of the rod-shaped member around the rotation axis.
formed in the end mill have the same flute width lw, and are formed in phase positions defined by unequally dividing a peripheral surface of the rod-shaped member around the rotation axis.
[0020] With such a configuration, the lands are placed in a dispersed manner in aperiodic phase positions when viewed in axial cross section, and the lands are formed in positions slightly displaced from equally divided positions along a periphery of the rod-shaped member, thereby preventing generation of resonance by natural frequency of the end mill. This allows cutting by high speed rotation at any rotational speed.
[0021] (6) In any one of the end mills, it is preferable that in each position in a direction of the rotation axis S of the end mill, a land width 2w (residual land width 23w) of the residual land 23 is larger than any of the land widths 2w (first land width 21w and second land width 22w) of the first land 21 and the second land 22.
[0022] With such a configuration, a longer contact time of the object to be cut with the residual land 23 that finishes the cut surface is ensured than an abutment time of the object to be cut against each nick for cutting and ejection of chip, and the finishing blade 4 abuts against the surface to be cut at timing shifted from cutting timing by the first land 21 and the second land 22. This ensures formation of the finished surface and improves roughness of the finished surface.
[0023] In the above, the land widths 2w (first land width 21w and second land width 22w) of the first land 21 and the second land 22 are equal to each other as in an embodiment described later, but the land widths may be unequal. Also, when a plurality of sets of lands are provided as in Embodiment 3 described later, a first land 21 and a second land 22 of one set may have different land widths from a first land 21 and a second land 22 of the other set.
When the plurality of lands thus have unequal land widths 2w, cutting timing and contact time with the object to be cut are unequal, thereby providing different cutting effects for different lands.
Advantage of the Invention [0024] The present invention has the above-described configuration, and thus contacts of the first nick, the second nick, and the finishing blade 4 with the object to be cut are successively repeated to prevent whitening of the cut surface and interlayer delamination, thereby allowing a relatively beautiful finished surface to be formed. Also, an end mill can be provided that prevents occurrence of resin deposition during cutting, allows long-hour cutting of FRP resin by high speed rotation, and has excellent durability.
Best Mode for Carrying Out the Invention [0025] Now, the best mode for carrying out the present invention will be described as embodiments with reference to the drawings. Figures 1 to 4 show an end mill of Embodiment I of the present invention. Figure 3 is a partially enlarged view in axial section of a nick, and Figure 4 shows an intermediate product before cutting edge formation in a production method of the end mill of Embodiment 1. Figures 5 and 6 show tip structures on front view of end mills of Embodiments 2 and 3.
When the plurality of lands thus have unequal land widths 2w, cutting timing and contact time with the object to be cut are unequal, thereby providing different cutting effects for different lands.
Advantage of the Invention [0024] The present invention has the above-described configuration, and thus contacts of the first nick, the second nick, and the finishing blade 4 with the object to be cut are successively repeated to prevent whitening of the cut surface and interlayer delamination, thereby allowing a relatively beautiful finished surface to be formed. Also, an end mill can be provided that prevents occurrence of resin deposition during cutting, allows long-hour cutting of FRP resin by high speed rotation, and has excellent durability.
Best Mode for Carrying Out the Invention [0025] Now, the best mode for carrying out the present invention will be described as embodiments with reference to the drawings. Figures 1 to 4 show an end mill of Embodiment I of the present invention. Figure 3 is a partially enlarged view in axial section of a nick, and Figure 4 shows an intermediate product before cutting edge formation in a production method of the end mill of Embodiment 1. Figures 5 and 6 show tip structures on front view of end mills of Embodiments 2 and 3.
[0026] In any of the embodiments described below, the end mill of the present invention is formed of a rod-shaped member having a rotation axis S that includes a blade portion on a tip side and a shank portion on a base end side, and a plurality of helical flutes I are formed in the rod-shaped member to form a plurality of lands between the helical flutes 1. The number of the plurality of helical flutes 1 and lands is an odd number equal to or larger than three.
[0027] Three or more odd-numbered helical flutes I helically extending from a tip toward a base end side of the blade portion in a peripheral surface of the rod-shaped member are formed at predetermined phase intervals around the rotation axis S.
[0028] The three or more odd-numbered helical flutes I form odd-numbered lands 2 of the same number as the helical flutes I so as to similarly helically extend between adjacent helical flutes 1.
[0029] The odd-numbered lands 2 formed at the predetermined phase intervals in a periphery of the rod-shaped member are constituted by a first land 21 and a second land 22 adjacent to each other, and a residual land 23 other than the first land 21 and the second land 22.
[0030] The first land 21 and the second land 22 adjacent to each other constitute a set of lands.
[0031] A first nick 31 having a nick top 3t with a land width in a predetermined first direction al is formed in the first land 21. The first nick has a first nick top 3t with a land width in a predetermined first direction. The first direction is a direction inclined by an inclination angle a toward one side with respect to the rotation axis on side view.
[0032] A second nick has a second nick top 3t with a land width in a predetermined second direction different from the first direction. The second nick has the second nick top 3t in a land width direction inclined in a second direction opposite to the first direction with respect to the rotation axis S. The first direction and the second direction are different from each other.
[0033] The end mill of the present invention includes at least one set (one or more sets) of lands among the odd-numbered lands 2 formed around the rod-shaped member, and a finishing blade 4 is formed in the residual land 23 other than the set of lands among the odd-numbered lands 2.
[0034] In use of the end mill of the present invention, the end mill is inserted into an object to be cut of FRP resin having a hole and rotated at high speed. This allows cutting in two different directions and finishing of the cut surface to be simultaneously performed.
Conventional three steps including a one direction cutting step using a one direction nick blade and the other direction cutting step using the other direction nick blade, and a finishing step using the finishing blade 4 can be performed in one step. Each configuration will be described below in detail.
Conventional three steps including a one direction cutting step using a one direction nick blade and the other direction cutting step using the other direction nick blade, and a finishing step using the finishing blade 4 can be performed in one step. Each configuration will be described below in detail.
[0035] (Embodiment 1) Figure 1 is a perspective view of an end mill of Embodiment 1, and Figures 2 and 3 are illustrative views showing configurations of helical flutes I and lands 2 and therearound when viewed from a tip side of a blade portion (front view) and a lateral side (side view). Figure 4 is a partially enlarged illustrative view in section in a helical direction of a first nick in a first land 21, and Figure 5 is a perspective view of a diamond sintered state before the helical flutes 1 and the nicks 3 are provided in a production process of the end mill of the present invention.
[0036] In the end mill of Embodiment 1, three helical flutes 1 are formed on a tip side substantially at regular intervals, at 120 middle phase intervals around a rotation axis (referring to phase intervals of a middle position of each flute width 1w in this case), and thus a total of three lands 2 including one set of lands (one set of lands including a first land 21 and a second land 22) and one residual land 23 are formed substantially at regular intervals.
Among the three lands 2, a first one is the first land 21, a second one is the second land 22, and a third one is the residual land 23. A group of first nicks each having a nick top 3t in a first direction al are formed in the first land 21, a group of second nicks each having a nick top 3t in a second direction a2 are formed in the second land 22, and a finishing blade 4 having a polycrystalline diamond sintered portion 43 is formed in one residual land 23.
Among the three lands 2, a first one is the first land 21, a second one is the second land 22, and a third one is the residual land 23. A group of first nicks each having a nick top 3t in a first direction al are formed in the first land 21, a group of second nicks each having a nick top 3t in a second direction a2 are formed in the second land 22, and a finishing blade 4 having a polycrystalline diamond sintered portion 43 is formed in one residual land 23.
[0037] As shown in Figure 3, the first direction al of the nick top 3t of the first nick and the second direction a2 of the nick top 3t of the second nick are axisymmetrically inclined by the same inclination angle toward opposite sides with respect to the rotation axis S. In Figure 3, the nick top 3t of the first nick 31 is formed in the first direction inclined by an inclination angle + a toward one side with respect to the rotation axis S, and the nick top 3t of the second nick is formed in the second direction inclined by an inclination angle a (-a) toward the other side with respect to the rotation axis S. Since the first nick and the second nick are inclined by the same angle symmetrically with respect to the rotation axis S, the first land 21 and the second land 22 have the same forming directions of a contact angle and a clearance angle of a blade on the object to be cut, and cutting with the same efficiency is continuously performed.
[0038] (Nick) As in the partially enlarged illustrative view in section in the helical direction in Figure 4, the first nick 31 in the first land 21 is formed of a vertically oriented isosceles angular shape equally extending in the helical direction, and lower portions of a plurality of first nicks are connected and continuous in the helical direction of the first land 21. The second nick in the second land 22 is also formed to have the same size, shape and pitch. Oblique lines that form the angular shape of the nick extend forward and rearward in an obliquely downward direction symmetrically with respect to the nick top 3t of the nick. This allows cutting without forward and rearward displacement in the helical direction, that is, displacement in an extending direction of the first land 21. For example, if a front side or a rear side substantially vertically stands in a section of one nick, a deflection force is applied to a standing side in cutting to cause abrasion or fracture. In this embodiment, the first and second nicks all have a forward and rearward symmetrical shape and the same size, thereby allowing more uniform cutting with less force deflection. This reduces abrasion loads on the finishing blade 4 that simultaneously performs finishing.
[0039] (Relieving) As shown in Figure 2, the first nick and the second nick are formed so that a height of the nick top 3t from the rotation axis decreases from one end (front side in the rotational direction) toward the other end (rear side in the rotational direction) of the land width. This shape is obtained by so-called relieving. By the relieving, each nick has, at the nick top 3t, a clearance angle in axial cross section, thereby promoting efficient ejection of chip and preventing frictional heat from persisting.
[0040] (Polycrystalline diamond sintered blade 43) The finishing blade 4 of the residual land 23 formed in this embodiment is a polycrystalline diamond sintered blade having a polycrystalline diamond sintered portion 43 at a corner. As shown in Figure 5, a helical recessed groove 41 is previously formed in a position in which the finishing blade 4 is formed from a tip toward a base end side of an outer periphery of an unmolded rod-shaped member 40 of carbide alloy, and the polycrystalline diamond or ceramic powder is embedded in the helical recessed groove 41 and then sintered to prepare a sintered member 42 (Figure 9) with which the polycrystalline diamond sintered portion 43 is integrally formed. The flutes I and the nicks 3 shown in Figure 1 are formed so that the polycrystalline diamond sintered portion 43 in the sintered member 42 is placed in the blade portion of the finishing blade 4. The finishing blade 4 is formed of the polycrystalline diamond sintered blade, thereby forming the finishing blade 4 having high abrasive resistance, and improved roughness of a finished surface.
[0041 ] (Land width 2w) Land widths 2w (first land width 21w and second land width 22w) of the first land 21 and the second land 22 of the end mill of Embodiment I are the same in each position on the rotation axis S, and a land width 2w (residual land width 23w) of only one residual land 23 is larger by a slight angular difference of I to 2 degrees than the first land width 21 and the second land width 22. Finishing using the finishing blade 4 is performed slightly longer than a contact time using each nick 3 to focus on finishing in one cutting rotation, thereby preventing nicked blades.
[0042] As another aspect of Embodiment 1, the land widths 2w (first land width 21w and second land width 22w) of the first land 21 and the second land 22 may have slightly unequal widths in each position of the rotation axis S of the end mill. Also in this case, the land width 2w (residual land width 23w) of the residual land 23 is preferably larger by a slight angular difference of I to 2 degrees than the first land 21 and the second land width 22. For example, the nick tops 3t are equal toward a tip of the end mill, and the land width 2w (residual land width 23w) of only one residual land 23 is larger than the land widths 2w (first land widths 21w and second land width 22w) of the first land 21 and the second land 22.
Other configurations are the same as in Embodiment 1.
(Embodiment 2) Figure 6 is a perspective view of an end mill of Embodiment 2, and Figures 7 and 8 are illustrative views showing configurations of helical flutes 1 and lands 2 when viewed from a tip side of a blade portion (front view) and a lateral side (side view).
Figure 9 is a perspective view of a sintered member 42 in a production process.
[0043] In the end mill of Embodiment 2, five helical flutes I are formed on a tip side substantially at regular intervals, at 70 to 74 middle phase intervals around a rotation axis (phase intervals of a middle position of each flute width 1w), and thus a total of five lands 2 including one set of lands and three residual lands 23 are formed in unequally divided positions with spaces between adjacent lands slightly increased or decreased.
Among the three lands 2, a first one is a first land 21, a second one is a second land 22, and third to fifth ones are a first residual land 231, a second residual land 232, and a third residual land 233.
A group of first nicks each having a nick top 3t in a first direction a] are formed in the first land 21, a group of second nicks each having a nick top 3t in a second direction a2 are formed in the second land 22, and finishing blades 4 formed by polycrystalline diamond sintering are formed in the first residual land 231 and the second residual land 232 among the three residual lands 23.
[0044] (Polycrystalline diamond sintered blade 43) The finishing blades 4 of the first and second residual lands 231 and 232 except the third residual land 233 among the three residual lands 23 formed in this embodiment are polycrystalline diamond sintered blades. Two helical recessed grooves 41 with a phase difference of 72 from an axial center are previously formed in positions in which the finishing blades 4 are formed from a tip toward a base end side of an outer periphery of an unmolded carbide rod-shaped member 40, and the polycrystalline diamond or ceramic powder is embedded in the helical recessed groove 41 and then sintered to prepare a sintered member 42 (Figure 9) with which the two helically extending polycrystalline diamond sintered portions 43 are integrally formed. The flutes I and the nicks 3 are formed so that the polycrystalline diamond sintered portions 43 in the sintered member 42 are placed in blade portions of the finishing blades 4 of the first and second residual lands 231 and 232. In Embodiment 2, among the three finishing blades 4, two finishing blades 4 on a front side in a rotational direction are formed of polycrystalline diamond sintered blades having the polycrystalline diamond sintered portions 43, and finishing using the two diamond sintered blades is first successively performed in cutting, and then finishing using the carbide finishing blade is performed. This provides the finishing blades 4 having high abrasive resistance and a high finishing effect.
[0045] (Unequal division of helical flutes 1) The plurality of helical flutes I formed in the end mill of Embodiment 2 have the same flute width 1w, and formed in phase positions defined by unequally dividing a peripheral surface of a rod-shaped member around the rotation axis. With such a configuration, the lands are placed in a dispersed manner in aperiodic phase positions when viewed in axial cross section, and the lands are formed in positions slightly displaced from equally divided positions along a periphery of the rod-shaped member, thereby preventing generation of resonance by natural frequency of the end mill. This allows cutting by high speed rotation at any rotational speed.
[0046] (Land width 2w) As another aspect of Embodiment 1, land widths 2w (first land width 21w and second land width 22w) of the first land 21 and the second land 22 are equal to each other in each position of the rotation axis S of the end mill, and land widths 2w (residual land widths 23w) of the other three residual lands 23 are equal to each other. The land widths 2w (first land width 21w and second land width 22w) of the first land 21 and the second land 22 are larger than each land width 2w (23w) of the three residual lands 23. The land width 2w with the nick and the land width 2w (23w) with the finishing blade are unequal to prevent generation of resonance in high speed rotation, and finishing in a shorter time than cutting in each of the first and second directions is repeated many times in one rotation, thereby allowing cutting while trimming a cut surface. This reduces loads on the nick, and improves durability.
Other configurations are the same as in Embodiment 1.
(Embodiment 3) Figure 10 is an illustrative view showing configurations of helical flutes I
and lands 2 and therearound when viewed from a tip side of a blade portion of an end mill of Embodiment 3.
[0047] In the end mill of Embodiment 3, five helical flutes I are formed on a tip side substantially at regular intervals, at 70 to 74 middle phase intervals around a rotation axis (phase intervals of a middle position of each flute width 1w), and thus a total of five lands 2 including two sets of lands A and B and one residual land 23 are formed in unequally divided positions with spaces between adjacent lands slightly increased or decreased.
Among the five lands 2, a first one is a first land 21 of a first set, a second one is a second land 22 of the first set, a third one is a first land 21 of a second set, a fourth one is a second land 22 of the second set, and a fifth one is a residual land 23. In the sets A and B, a group of first nicks each having a nick top 3t in a first direction al are formed in the first land 21, and a group of second nicks each having a nick top 3t in a second direction a2 are formed in the second land 22. A finishing blade 4 by polycrystalline diamond sintering is formed in one residual land 23.
[0048] The first land 21 and the second land 22 that constitute each set of lands have the same land width 2W, and each land 2 of the set of lands A has a longer land width 2w than each land 2 of the set of lands B. The first and second lands 21 and 22 of the set A on a rear side in the rotational direction that are first brought into contact with an object to be cut in rotational cutting eject larger chip, and thus have the longer land widths 2w than the first and second lands 21 and 22 of the set B to facilitate ejection of chip.
[0049] According to this embodiment, in cutting of one rotation, two direction cutting of the set A is performed and two direction cutting of the set B is successively performed, and then finishing using the polycrystalline diamond sintered blade is performed. Other configurations are the same as in Embodiment 1.
[0050] (Embodiments 4 to 6) End mills of Embodiments 4, 5 and 6 (Figures 1 la, 1 lb and l lc) have a middle blade 51 or a peripheral blade 52 protruding at a tip. As shown in Figure 12, a second nick thereof has a nick flute 3d having a semicircular section, a vertical portion 323 is formed from a front end of the nick flute 3d, and inclined portions 321 and 322 are formed on front and rear sides of the nick top 3t.
[0051 ] (Other operation and effect) With the above-described configuration, the end mill of the present invention is suitable for cutting of FRP composite containing FRP-reinforced fiber, and has the operation and effect described below.
- The first nick in the first direction and the second nick in the second direction inclined symmetrically with respect to the rotation axis prevent "fuzzing", "roughness", and "burrs".
A series of cutting steps including first cutting and second cutting, and a finishing step performed after the cutting steps are successively repeated, and thus cutting is uniformly performed little by little while finishing is performed little by little, thereby preventing "whitening" of finished FRP resin or "interlayer delamination" of FRP formed in multiple layers.
- After one (Embodiments 1 and 3) or more (Embodiment 2) cutting steps, one (Embodiments I and 2) or more finishing steps are necessarily performed, and the cutting step and the finishing step are successively repeated to continue cutting, thereby promoting emission of frictional heat in contact with the finishing blade 4. Also, so-called relieving is performed to prevent frictional heat from persisting in the object to be cut or the end mill. This allows long-hour cutting.
- The land of the finishing blade 4 is formed adjacent to the set of cutting lands including the plurality of sets of symmetrical cutting blades, thereby facilitating contact of the object to be cut with the cutting land, reducing abrasion of the nicks in the first and second lands 22 even in high speed cutting, and improving durability.
- The lands are partially unequally divided, or the finishing lands are partially formed to have a large width, thereby preventing resonance by natural frequency, and simultaneously enhancing the finishing function of the finishing blade 4 and relatively reducing abrasion of the finishing blade 4.
- There is no need for conventional three steps including a first cutting step using a first nick, a second cutting step using a second nick, and a finishing step using a finishing blade 4, and preparation of rotary blades for each step and setting of a machine can be performed in one procedure of a simultaneous step of cutting and finishing using the end mill of the present invention. This allows efficient production.
- The end mill can be easily produced, and there is no need to prepare a plurality of rotary blades, and thus can be obtained at low cost.
[0052] Specific configurations of components are not limited to the embodiments described above, but various changes may be made without departing from the gist of the present invention, such as extraction or combination of elements of the embodiments or replacement by equivalents.
Brief Description of the Drawings [0053]
Figure 1 is a perspective illustrative view of an end mill of Embodiment 1 of the present invention;
Figure 2 is a front illustrative view showing arrangement of lands of the end mill of Embodiment 1;
Figure 3 is a side illustrative view of the end mill of Embodiment 1;
Figure 4 is a partial illustrative view in axial cross section of a first nick in the end mill of Embodiment 1;
Figure 5 is a perspective illustrative view of an end mill of Embodiment 2 of the present invention;
Figure 6 is a front illustrative view showing arrangement of lands of the end mill of Embodiment 2;
Figure 7 is a side illustrative view of the end mill of Embodiment 2;
Figure 8 is a perspective illustrative view of an intermediate product in production of the end mill of Embodiment 2;
Figure 9 is a perspective illustrative view of the intermediate product in production of the end mill of Embodiment 2;
Figure 10 is a front illustrative view showing arrangement of lands of the end mill of Embodiment 3;
Figure 11 is a side illustrative view of end mills of Embodiments 4 to 6; and Figure 12 is a partial illustrative view in axial cross section of a first nick in the end mills of Embodiments 4 to 6.
Description of Symbols [0054]
1 helical flute 2 land 21 first land 22 second land 23 residual land 2w land width 21w first land width 22w second land width 23w residual land width 231 first residual land 232 second residual land al first direction 31 first nick a2 second direction 32 second nick 3t nick top 3d nick flute 321 inclined portion 322 inclined portion 323 vertical portion a inclination angle 4 finishing blade 40 rod-shaped member 41 helical recessed groove 42 sintered member 43 polycrystalline diamond sintered portion 51 middle blade 52 peripheral blade S rotation axis
[0041 ] (Land width 2w) Land widths 2w (first land width 21w and second land width 22w) of the first land 21 and the second land 22 of the end mill of Embodiment I are the same in each position on the rotation axis S, and a land width 2w (residual land width 23w) of only one residual land 23 is larger by a slight angular difference of I to 2 degrees than the first land width 21 and the second land width 22. Finishing using the finishing blade 4 is performed slightly longer than a contact time using each nick 3 to focus on finishing in one cutting rotation, thereby preventing nicked blades.
[0042] As another aspect of Embodiment 1, the land widths 2w (first land width 21w and second land width 22w) of the first land 21 and the second land 22 may have slightly unequal widths in each position of the rotation axis S of the end mill. Also in this case, the land width 2w (residual land width 23w) of the residual land 23 is preferably larger by a slight angular difference of I to 2 degrees than the first land 21 and the second land width 22. For example, the nick tops 3t are equal toward a tip of the end mill, and the land width 2w (residual land width 23w) of only one residual land 23 is larger than the land widths 2w (first land widths 21w and second land width 22w) of the first land 21 and the second land 22.
Other configurations are the same as in Embodiment 1.
(Embodiment 2) Figure 6 is a perspective view of an end mill of Embodiment 2, and Figures 7 and 8 are illustrative views showing configurations of helical flutes 1 and lands 2 when viewed from a tip side of a blade portion (front view) and a lateral side (side view).
Figure 9 is a perspective view of a sintered member 42 in a production process.
[0043] In the end mill of Embodiment 2, five helical flutes I are formed on a tip side substantially at regular intervals, at 70 to 74 middle phase intervals around a rotation axis (phase intervals of a middle position of each flute width 1w), and thus a total of five lands 2 including one set of lands and three residual lands 23 are formed in unequally divided positions with spaces between adjacent lands slightly increased or decreased.
Among the three lands 2, a first one is a first land 21, a second one is a second land 22, and third to fifth ones are a first residual land 231, a second residual land 232, and a third residual land 233.
A group of first nicks each having a nick top 3t in a first direction a] are formed in the first land 21, a group of second nicks each having a nick top 3t in a second direction a2 are formed in the second land 22, and finishing blades 4 formed by polycrystalline diamond sintering are formed in the first residual land 231 and the second residual land 232 among the three residual lands 23.
[0044] (Polycrystalline diamond sintered blade 43) The finishing blades 4 of the first and second residual lands 231 and 232 except the third residual land 233 among the three residual lands 23 formed in this embodiment are polycrystalline diamond sintered blades. Two helical recessed grooves 41 with a phase difference of 72 from an axial center are previously formed in positions in which the finishing blades 4 are formed from a tip toward a base end side of an outer periphery of an unmolded carbide rod-shaped member 40, and the polycrystalline diamond or ceramic powder is embedded in the helical recessed groove 41 and then sintered to prepare a sintered member 42 (Figure 9) with which the two helically extending polycrystalline diamond sintered portions 43 are integrally formed. The flutes I and the nicks 3 are formed so that the polycrystalline diamond sintered portions 43 in the sintered member 42 are placed in blade portions of the finishing blades 4 of the first and second residual lands 231 and 232. In Embodiment 2, among the three finishing blades 4, two finishing blades 4 on a front side in a rotational direction are formed of polycrystalline diamond sintered blades having the polycrystalline diamond sintered portions 43, and finishing using the two diamond sintered blades is first successively performed in cutting, and then finishing using the carbide finishing blade is performed. This provides the finishing blades 4 having high abrasive resistance and a high finishing effect.
[0045] (Unequal division of helical flutes 1) The plurality of helical flutes I formed in the end mill of Embodiment 2 have the same flute width 1w, and formed in phase positions defined by unequally dividing a peripheral surface of a rod-shaped member around the rotation axis. With such a configuration, the lands are placed in a dispersed manner in aperiodic phase positions when viewed in axial cross section, and the lands are formed in positions slightly displaced from equally divided positions along a periphery of the rod-shaped member, thereby preventing generation of resonance by natural frequency of the end mill. This allows cutting by high speed rotation at any rotational speed.
[0046] (Land width 2w) As another aspect of Embodiment 1, land widths 2w (first land width 21w and second land width 22w) of the first land 21 and the second land 22 are equal to each other in each position of the rotation axis S of the end mill, and land widths 2w (residual land widths 23w) of the other three residual lands 23 are equal to each other. The land widths 2w (first land width 21w and second land width 22w) of the first land 21 and the second land 22 are larger than each land width 2w (23w) of the three residual lands 23. The land width 2w with the nick and the land width 2w (23w) with the finishing blade are unequal to prevent generation of resonance in high speed rotation, and finishing in a shorter time than cutting in each of the first and second directions is repeated many times in one rotation, thereby allowing cutting while trimming a cut surface. This reduces loads on the nick, and improves durability.
Other configurations are the same as in Embodiment 1.
(Embodiment 3) Figure 10 is an illustrative view showing configurations of helical flutes I
and lands 2 and therearound when viewed from a tip side of a blade portion of an end mill of Embodiment 3.
[0047] In the end mill of Embodiment 3, five helical flutes I are formed on a tip side substantially at regular intervals, at 70 to 74 middle phase intervals around a rotation axis (phase intervals of a middle position of each flute width 1w), and thus a total of five lands 2 including two sets of lands A and B and one residual land 23 are formed in unequally divided positions with spaces between adjacent lands slightly increased or decreased.
Among the five lands 2, a first one is a first land 21 of a first set, a second one is a second land 22 of the first set, a third one is a first land 21 of a second set, a fourth one is a second land 22 of the second set, and a fifth one is a residual land 23. In the sets A and B, a group of first nicks each having a nick top 3t in a first direction al are formed in the first land 21, and a group of second nicks each having a nick top 3t in a second direction a2 are formed in the second land 22. A finishing blade 4 by polycrystalline diamond sintering is formed in one residual land 23.
[0048] The first land 21 and the second land 22 that constitute each set of lands have the same land width 2W, and each land 2 of the set of lands A has a longer land width 2w than each land 2 of the set of lands B. The first and second lands 21 and 22 of the set A on a rear side in the rotational direction that are first brought into contact with an object to be cut in rotational cutting eject larger chip, and thus have the longer land widths 2w than the first and second lands 21 and 22 of the set B to facilitate ejection of chip.
[0049] According to this embodiment, in cutting of one rotation, two direction cutting of the set A is performed and two direction cutting of the set B is successively performed, and then finishing using the polycrystalline diamond sintered blade is performed. Other configurations are the same as in Embodiment 1.
[0050] (Embodiments 4 to 6) End mills of Embodiments 4, 5 and 6 (Figures 1 la, 1 lb and l lc) have a middle blade 51 or a peripheral blade 52 protruding at a tip. As shown in Figure 12, a second nick thereof has a nick flute 3d having a semicircular section, a vertical portion 323 is formed from a front end of the nick flute 3d, and inclined portions 321 and 322 are formed on front and rear sides of the nick top 3t.
[0051 ] (Other operation and effect) With the above-described configuration, the end mill of the present invention is suitable for cutting of FRP composite containing FRP-reinforced fiber, and has the operation and effect described below.
- The first nick in the first direction and the second nick in the second direction inclined symmetrically with respect to the rotation axis prevent "fuzzing", "roughness", and "burrs".
A series of cutting steps including first cutting and second cutting, and a finishing step performed after the cutting steps are successively repeated, and thus cutting is uniformly performed little by little while finishing is performed little by little, thereby preventing "whitening" of finished FRP resin or "interlayer delamination" of FRP formed in multiple layers.
- After one (Embodiments 1 and 3) or more (Embodiment 2) cutting steps, one (Embodiments I and 2) or more finishing steps are necessarily performed, and the cutting step and the finishing step are successively repeated to continue cutting, thereby promoting emission of frictional heat in contact with the finishing blade 4. Also, so-called relieving is performed to prevent frictional heat from persisting in the object to be cut or the end mill. This allows long-hour cutting.
- The land of the finishing blade 4 is formed adjacent to the set of cutting lands including the plurality of sets of symmetrical cutting blades, thereby facilitating contact of the object to be cut with the cutting land, reducing abrasion of the nicks in the first and second lands 22 even in high speed cutting, and improving durability.
- The lands are partially unequally divided, or the finishing lands are partially formed to have a large width, thereby preventing resonance by natural frequency, and simultaneously enhancing the finishing function of the finishing blade 4 and relatively reducing abrasion of the finishing blade 4.
- There is no need for conventional three steps including a first cutting step using a first nick, a second cutting step using a second nick, and a finishing step using a finishing blade 4, and preparation of rotary blades for each step and setting of a machine can be performed in one procedure of a simultaneous step of cutting and finishing using the end mill of the present invention. This allows efficient production.
- The end mill can be easily produced, and there is no need to prepare a plurality of rotary blades, and thus can be obtained at low cost.
[0052] Specific configurations of components are not limited to the embodiments described above, but various changes may be made without departing from the gist of the present invention, such as extraction or combination of elements of the embodiments or replacement by equivalents.
Brief Description of the Drawings [0053]
Figure 1 is a perspective illustrative view of an end mill of Embodiment 1 of the present invention;
Figure 2 is a front illustrative view showing arrangement of lands of the end mill of Embodiment 1;
Figure 3 is a side illustrative view of the end mill of Embodiment 1;
Figure 4 is a partial illustrative view in axial cross section of a first nick in the end mill of Embodiment 1;
Figure 5 is a perspective illustrative view of an end mill of Embodiment 2 of the present invention;
Figure 6 is a front illustrative view showing arrangement of lands of the end mill of Embodiment 2;
Figure 7 is a side illustrative view of the end mill of Embodiment 2;
Figure 8 is a perspective illustrative view of an intermediate product in production of the end mill of Embodiment 2;
Figure 9 is a perspective illustrative view of the intermediate product in production of the end mill of Embodiment 2;
Figure 10 is a front illustrative view showing arrangement of lands of the end mill of Embodiment 3;
Figure 11 is a side illustrative view of end mills of Embodiments 4 to 6; and Figure 12 is a partial illustrative view in axial cross section of a first nick in the end mills of Embodiments 4 to 6.
Description of Symbols [0054]
1 helical flute 2 land 21 first land 22 second land 23 residual land 2w land width 21w first land width 22w second land width 23w residual land width 231 first residual land 232 second residual land al first direction 31 first nick a2 second direction 32 second nick 3t nick top 3d nick flute 321 inclined portion 322 inclined portion 323 vertical portion a inclination angle 4 finishing blade 40 rod-shaped member 41 helical recessed groove 42 sintered member 43 polycrystalline diamond sintered portion 51 middle blade 52 peripheral blade S rotation axis
Claims (6)
1. An end mill including a rod-shaped member having a rotation axis (S) that includes a blade portion on a tip side and a shank portion on a base end side, in which odd-numbered helical flutes (1) are formed at predetermined phase intervals around the rotation axis (S), the helical flutes helically extending from a tip toward a base end side of the blade portion in a peripheral surface of the rod-shaped member, the odd-numbered helical flutes (1) form odd-numbered lands (2) between adjacent helical flutes (1), wherein in each land that constitutes at least one set of adjacent lands among the odd-numbered lands (2), a first nick (31) having a top with a land width in a predetermined first direction (a1) and a second nick (32) having a top with a land width in a second direction a2 different from the first direction are formed, and a finishing blade is formed in a residual land (23) other than the set of lands among the odd-numbered lands 2.
2. The end mill according to claim 1, wherein the first direction (a1) of the top of the first nick and the second direction (a2) of the top of the second nick are axisymmetrically inclined by the same inclination angle toward opposite sides with respect to the rotation axis (S).
3. The end mill according to claim I or 2, wherein the finishing blade (4) of at least one residual land (23) is a polycrystalline diamond sintered blade.
4. The end mill according to claim 1, 2 or 3, wherein the first nick (31) and the second nick (32) each have a shape in which a height of the top from the rotation axis (S) decreases from one end toward the other end of the land width.
5. The end mill according to claim 1, 2, 3 or 4, wherein the plurality of helical flutes (1) have the same flute width (1w), and are formed in phase positions defined by unequally dividing a peripheral surface of the rod-shaped member around the rotation axis.
6. The end mill according to claim 1, 2, 3, 4 or 5, wherein in each position in a direction of the rotation axis (S), a land width (2w) of the residual land (23) is larger than each land width 2w of the first land (21) and the second land (22).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-303169 | 2008-11-27 | ||
| JP2008303169 | 2008-11-27 | ||
| PCT/JP2009/070064 WO2010061933A1 (en) | 2008-11-27 | 2009-11-27 | End mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2741681A1 true CA2741681A1 (en) | 2010-06-03 |
Family
ID=42225802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2741681A Abandoned CA2741681A1 (en) | 2008-11-27 | 2009-11-27 | End mill |
Country Status (4)
| Country | Link |
|---|---|
| JP (2) | JP5610292B2 (en) |
| CN (1) | CN102227279A (en) |
| CA (1) | CA2741681A1 (en) |
| WO (1) | WO2010061933A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2013329881B2 (en) * | 2012-10-10 | 2016-02-18 | Hufschmied Zerspanungssysteme Gmbh | Face cutter for machining fibre-reinforced materials such as carbon-fibre-reinforced plastics (CFRP) |
| US20200290134A1 (en) * | 2017-04-27 | 2020-09-17 | Kyocera Corporation | Rotary tool and method for manufacturing cut product |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9232952B2 (en) | 2012-04-16 | 2016-01-12 | Medtronic Ps Medical, Inc. | Surgical bur with non-paired flutes |
| CN103071840A (en) * | 2013-01-31 | 2013-05-01 | 哈尔滨理工大学 | Pineapple end mill for carbon fiber reinforced composite |
| DE102013106612A1 (en) * | 2013-06-25 | 2015-01-08 | Schott Ag | Tool crown and with the tool crown manufacturable glass ceramic product |
| US9883873B2 (en) | 2013-07-17 | 2018-02-06 | Medtronic Ps Medical, Inc. | Surgical burs with geometries having non-drifting and soft tissue protective characteristics |
| US10335166B2 (en) | 2014-04-16 | 2019-07-02 | Medtronics Ps Medical, Inc. | Surgical burs with decoupled rake surfaces and corresponding axial and radial rake angles |
| TWI508804B (en) * | 2014-12-23 | 2015-11-21 | Hsin Tien Chang | Screw feed cutter |
| US9955981B2 (en) | 2015-03-31 | 2018-05-01 | Medtronic Xomed, Inc | Surgical burs with localized auxiliary flutes |
| US10265082B2 (en) | 2015-08-31 | 2019-04-23 | Medtronic Ps Medical, Inc. | Surgical burs |
| DE102015119355B4 (en) | 2015-11-10 | 2018-09-20 | Albert Knebel Holding Gmbh | cutting tool |
| DE102016006995B3 (en) * | 2016-06-09 | 2017-10-19 | Hufschmied Zerspanungssysteme Gmbh | Electrode graphite cutter |
| DE102019211724A1 (en) * | 2019-08-05 | 2021-02-11 | Gühring KG | END MILL |
| CN113199068A (en) * | 2021-03-31 | 2021-08-03 | 成都飞机工业（集团）有限责任公司 | Machining method for sharp corner structure of glass fiber reinforced plastic part |
| US20240253136A1 (en) * | 2023-02-01 | 2024-08-01 | Sumitomo Electric Hardmetal Corp. | Cutting tool |
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| JPS5269086A (en) * | 1975-12-06 | 1977-06-08 | Mitsubishi Metal Corp | Face milling cutter |
| JPS57138522A (en) * | 1981-02-16 | 1982-08-26 | Sumitomo Electric Ind Ltd | Compound rotary cutter |
| JPS642816A (en) * | 1987-06-23 | 1989-01-06 | G N Tool Kk | Reamer provided with nick |
| JPH0618737Y2 (en) * | 1988-01-23 | 1994-05-18 | オーエスジー株式会社 | End mill |
| JPH0832382B2 (en) * | 1988-10-31 | 1996-03-29 | ジーエヌツール株式会社 | Cutting tool with nick |
| CN1019557B (en) * | 1990-02-07 | 1992-12-23 | Gn工具株式会社 | Cutting tool with twisted edge and manufacturing method thereof |
| JPH088012Y2 (en) * | 1990-09-28 | 1996-03-06 | 住友電気工業株式会社 | Rotary tool |
| JP2666007B2 (en) * | 1991-06-20 | 1997-10-22 | ジーエヌツール株式会社 | Cutting tool with nick |
| JP3356823B2 (en) * | 1993-05-07 | 2002-12-16 | 日立ツール株式会社 | Roughing end mill |
| JPH0760527A (en) * | 1993-08-26 | 1995-03-07 | Hitachi Tool Eng Ltd | End mill for rough finishing |
| US20040057803A1 (en) * | 2002-01-08 | 2004-03-25 | Walrath Richard J. | Rotary metal cutting tool |
| DE10233530A1 (en) * | 2002-07-23 | 2004-02-12 | Komet Präzisionswerkzeuge Robert Breuning Gmbh | Machine tool with a tool shank and a cutting head |
| JP2005219176A (en) * | 2004-02-09 | 2005-08-18 | Nachi Fujikoshi Corp | End mill |
| JP2007021603A (en) * | 2005-07-13 | 2007-02-01 | Sanko Seisakusho:Kk | End mill |
| JP3145278U (en) * | 2008-07-23 | 2008-10-02 | 震虎精密科技股▲ふん▼有限公司 | Milling cutter for rough and finish cutting |
-
2009
- 2009-11-27 WO PCT/JP2009/070064 patent/WO2010061933A1/en active Application Filing
- 2009-11-27 CA CA2741681A patent/CA2741681A1/en not_active Abandoned
- 2009-11-27 CN CN2009801475700A patent/CN102227279A/en active Pending
- 2009-11-27 JP JP2010540534A patent/JP5610292B2/en not_active Expired - Fee Related
-
2014
- 2014-05-29 JP JP2014110825A patent/JP2014148041A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2013329881B2 (en) * | 2012-10-10 | 2016-02-18 | Hufschmied Zerspanungssysteme Gmbh | Face cutter for machining fibre-reinforced materials such as carbon-fibre-reinforced plastics (CFRP) |
| US9849522B2 (en) | 2012-10-10 | 2017-12-26 | Hufschmied Zerspanungssysteme Gmbh | End milling cutter for processing of fiber-reinforced materials such as carobon fiber reinforced plastics (CFRP) |
| US20200290134A1 (en) * | 2017-04-27 | 2020-09-17 | Kyocera Corporation | Rotary tool and method for manufacturing cut product |
| US11642729B2 (en) * | 2017-04-27 | 2023-05-09 | Kyocera Corporation | Rotary tool and method for manufacturing cut product |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5610292B2 (en) | 2014-10-22 |
| CN102227279A (en) | 2011-10-26 |
| JPWO2010061933A1 (en) | 2012-04-26 |
| WO2010061933A1 (en) | 2010-06-03 |
| JP2014148041A (en) | 2014-08-21 |
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