WO2012043629A1 - 切削インサートおよび切削工具、並びにそれらを用いた切削加工物の製造方法 - Google Patents
切削インサートおよび切削工具、並びにそれらを用いた切削加工物の製造方法 Download PDFInfo
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- WO2012043629A1 WO2012043629A1 PCT/JP2011/072181 JP2011072181W WO2012043629A1 WO 2012043629 A1 WO2012043629 A1 WO 2012043629A1 JP 2011072181 W JP2011072181 W JP 2011072181W WO 2012043629 A1 WO2012043629 A1 WO 2012043629A1
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- WIPO (PCT)
- Prior art keywords
- cutting edge
- cutting
- protrusion
- cutting insert
- pair
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
- B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
- B23B27/1603—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with specially shaped plate-like exchangeable cutting inserts, e.g. chip-breaking groove
- B23B27/1611—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with specially shaped plate-like exchangeable cutting inserts, e.g. chip-breaking groove characterised by having a special shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/04—Cutting-off tools
- B23B27/045—Cutting-off tools with chip-breaking arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
- B23B29/04—Tool holders for a single cutting tool
- B23B29/043—Tool holders for a single cutting tool with cutting-off, grooving or profile cutting tools, i.e. blade- or disc-like main cutting parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2200/00—Details of cutting inserts
- B23B2200/08—Rake or top surfaces
- B23B2200/081—Rake or top surfaces with projections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2220/00—Details of turning, boring or drilling processes
- B23B2220/12—Grooving
- B23B2220/126—Producing ring grooves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
- Y10T407/2268—Cutters, for shaping including holder having seat for inserted tool with chip breaker, guide or deflector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/23—Cutters, for shaping including tool having plural alternatively usable cutting edges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/23—Cutters, for shaping including tool having plural alternatively usable cutting edges
- Y10T407/235—Cutters, for shaping including tool having plural alternatively usable cutting edges with integral chip breaker, guide or deflector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/24—Cutters, for shaping with chip breaker, guide or deflector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/24—Cutters, for shaping with chip breaker, guide or deflector
- Y10T407/245—Cutters, for shaping with chip breaker, guide or deflector comprising concave surface in cutting face of tool
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/25—Cutters, for shaping including cut off tool
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T82/00—Turning
- Y10T82/10—Process of turning
Definitions
- the present invention relates to a cutting insert, a cutting tool, and a manufacturing method of a cut product using them.
- Japanese Patent Application Laid-Open No. 2010-99815 has a cutting edge portion and a rectangular rake face facing a thickness direction orthogonal to the longitudinal direction and the width direction of the insert body at the longitudinal end of the axial insert body.
- a cutting insert in which a band-like twisted surface extending along the longitudinal direction is formed at both end portions in the width direction of the rake face.
- the cutting speed on the right end side and the left end side of the cutting blade is different, so In some cases, the discharge direction of the water tends to fluctuate from side to side. Further, the chips are generated spirally because the curl diameters on the right end part side and the left end part side of the chips are generated differently due to the influence of the cutting speed difference between the right end part side and the left end part side of the cutting blade. Therefore, as a result, the chip dischargeability may be deteriorated.
- One of the objects of the present invention is to provide a cutting insert and a cutting tool suitable for grooving, in particular, end face grooving, and a method of manufacturing a cut product using them.
- the cutting insert which concerns on embodiment of this invention is equipped with an upper surface, a side surface, and the 1st cutting blade located in the intersection part of the said upper surface and the said side surface,
- the said upper surface is a said 1st cutting blade.
- a pair of ridges positioned so as to face each other across the vertical bisector, and in top view, the tops of the pair of ridges are in a direction along the vertical bisector And at least two protrusions, the at least two protrusions being positioned closest to the vertical bisector, and the vertical relative to the first protrusion.
- a second protrusion that is positioned farther from the bisector and positioned higher than the first protrusion.
- a cutting tool includes the cutting insert according to the above-described embodiment and a holder to which the cutting insert is attached to a tip portion.
- the manufacturing method of the cut workpiece which concerns on embodiment of this invention contacts the process of rotating a workpiece, the said workpiece that is rotating, and the said 1st cutting blade of the cutting tool which concerns on embodiment mentioned above. And a step of separating the cutting tool and the work material.
- the cutting insert at the top of each of the pair of raised portions, at least two protrusions extending in the direction along the vertical bisector are provided, and at least two protrusions are provided.
- the first protrusion is located on the side closest to the vertical bisector, and is located on the side farther from the vertical bisector than the first protrusion and is higher than the first protrusion. 2nd protrusion part located in this. Therefore, for example, in the end face grooving process, the chips can be deformed and hardened by the first protrusions, and the horizontal protrusions in the discharge direction of the chips can be suppressed by the second protrusions. As a result, it becomes possible to improve the chip dischargeability because the chip discharge direction is stabilized.
- FIG. 1 is a perspective view which shows the cutting insert which concerns on 1st Embodiment of this invention
- (b) is a front view
- (c) is a top view (top view)
- (d) is a side view FIG. It is the perspective view which expanded a part of cutting part I and the clamp part II of the cutting insert shown in FIG.
- It is the top view (top view) which expanded a part of cutting part I and the clamp part II of the cutting insert shown in FIG.
- (A) is a cross-sectional view taken along line AA of the cutting insert shown in FIG. 3
- (b) is a cross-sectional view taken along line BB of the cutting insert shown in FIG. 3
- (c) is shown in FIG. It is sectional drawing in CC line of a cutting insert.
- FIG. 4 is a cross-sectional view taken along line DD of the cutting insert shown in FIG. 3.
- FIG. 4 is a cross-sectional view taken along line EE of the cutting insert shown in FIG. 3. It is the perspective view which expanded partially the cutting part I and the clamp part II of the cutting insert which concerns on 2nd Embodiment of this invention.
- It is a top view (top view) of the cutting insert shown in FIG. (A) is a cross-sectional view taken along line D'-D 'of the cutting insert shown in FIG.
- a cutting insert according to an embodiment of the present invention (hereinafter sometimes referred to as “insert”) will be described in detail with reference to FIGS.
- the insert of the present invention can be used for any of grooving of the inner diameter, grooving of the outer diameter, parting-off processing, and end face grooving.
- the insert of the present invention is used for end face grooving is described as an example.
- the insert 1 of the present embodiment has a prismatic shape, is located between the cutting portions I and I located at both ends, and the cutting portions I and I, and is placed on a holder 11 described later.
- a clamp portion II having a clamp surface 28 that contacts the holder 11 is provided. That is, the cutting part I is provided in pairs at both ends of the clamp part II.
- a mark M is attached to either one of the pair of cutting parts I and I.
- Examples of the material of the insert 1 include cemented carbide and cermet.
- the composition of the cemented carbide is, for example, WC—Co produced by adding cobalt (Co) powder to tungsten carbide (WC) and sintering, and WC—coating WC—Co with titanium carbide (TiC).
- Examples thereof include WC—TiC—TaC—Co in which tantalum carbide (TaC) is added to TiC—Co and WC—TiC—Co.
- the cermet is a sintered composite material in which a metal is combined with a ceramic component, and specifically includes a titanium compound mainly composed of titanium carbide (TiC) and titanium nitride (TiN).
- the surface of the insert 1 may be coated with a film using a chemical vapor deposition (CVD) method or a physical vapor deposition (PVD) method.
- CVD chemical vapor deposition
- PVD physical vapor deposition
- the composition of the coating include titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN), and alumina (Al 2 O 3 ).
- the cutting part I has an upper surface 2, a lower surface 3, and side surfaces 4 connected to the upper surface 2 and the lower surface 3, respectively.
- a part of the upper surface 2 functions as a rake surface
- a part of the lower surface 3 functions as a mounting surface for mounting on the holder 11
- a part of the side surface 4 functions as a flank.
- the cutting portion I has a polygonal shape when viewed from the top, and in the present embodiment, the cutting portion I has a rectangular shape having two long sides and two short sides when viewed from the top.
- the top view means a state in which the insert 1 is viewed from the top surface 2 side unless otherwise specified.
- the insert 1 may have a length in the longitudinal direction of 18 to 22 mm, and a length in the width direction perpendicular to the longitudinal direction in a top view may be 2 to 6 mm. Further, the length in the width direction of the insert 1 becomes smaller as it approaches the clamp portion II so that the insert 1 does not interfere with the inner wall surface of the groove machined into the work material during the cutting process.
- the height from the lower surface 3 to the upper surface 2 of the insert 1 may be set to 3.4 to 4.6 mm, for example. In addition, it is not restrict
- a cutting edge 5 is provided at the intersection of the upper surface 2 and the side surface 4.
- the cutting blade 5 is provided, for example, along the intersecting portion in the longitudinal direction and the width direction of the cutting portion I.
- the first cutting edge 51 along the intersecting portion in the width direction of the cutting portion I and the second cutting edge along the intersecting portion in the longitudinal direction of the cutting portion I. 52 are provided.
- transverse feed processing using the second cutting edge 52 for example, processing for expanding the width of the groove, or processing for finishing the bottom surface of the groove Can also be used.
- a pair of the second cutting blades 52 are arranged at both ends of the first cutting blade 51, and each of them intersects the first cutting blade 51, and the first cutting blade 51 is interposed therebetween. It arrange
- the shape of the cutting blade 5 is not particularly limited, such as a linear shape or an arc shape.
- the first cutting edge 51 is inclined so as to become lower as it goes toward the center in a side view. And has a recess 511.
- the side view means a state in which the insert 1 is viewed from the side surface 4 side unless otherwise specified.
- the cutting blade 5 may have a land portion.
- the land portion means a thin belt-like surface having a certain width provided on the upper surface 2 side along the cutting edge 5.
- the land portion is provided for the purpose of suppressing the chipping of the cutting edge 5.
- a rake face 21 is provided inside the cutting blade 5.
- the rake face 21 is a face that is rubbed when chips generated by the cutting blade 5 are discharged.
- the rake face continuous with the first cutting edge 51 is defined as a first rake face 21a
- the rake face continuous with the second cutting edge 52 is defined as a second rake face 21b.
- the first rake face 21 a is continuous with the first cutting edge 51, includes a horizontal plane including the intersecting portion (first cutting edge 51), that is, includes the intersecting portion (first cutting edge 51), and the central axis S of the insert 1. Is inclined so as to approach the lower surface 3 as the distance from the first cutting edge 51 increases.
- the second rake face 21b is continuous with the second cutting edge 52, includes a horizontal plane including the intersecting portion (second cutting edge 52), that is, includes the intersecting portion (second cutting edge 52) and the center of the insert 1
- the plane is inclined so as to approach the lower surface 3 as the distance from the second cutting edge 52 increases.
- the cutting edge 5 easily bites into the work material and the cutting resistance is reduced. Therefore, the relative vibration that occurs between the cutting edge 5 and the surface of the work material (hereinafter referred to as “chatter vibration”). ) Is suppressed and machining accuracy is improved.
- the center axis S of the insert 1 is an axis that penetrates between the upper surface 2 and the lower surface 3 as shown in FIG. 1, so that the positions of the cutting portions I and I are interchanged with each other in the insert 1. It shall mean the axis which becomes a rotation axis when rotating.
- the upper surface 2 is provided with a pair of raised portions 22, 22 that face each other across the vertical bisector L of the cutting edge 5.
- raised portions 22 a and 22 b that are opposed to each other with the vertical bisector L of the first cutting edge 51 interposed therebetween are provided.
- the vertical bisector L is a vertical bisector of the first cutting edge 51 that generates chips, so that the cross section of the chips can be deformed into a concave shape in the central portion, The balance in the width direction of the chips becomes good, and the dischargeability of the chips becomes good. Therefore, the chips generated by the first cutting edge 51 are deformed into a concave shape, so that the width of the first cutting edge 51, that is, the width of one side of the cutting portion I is narrowed. Scratching the surface is reduced.
- the raised portion 22 has a role of a so-called breaker, and by controlling the diameter of the generated chip curl well. It is possible to divide the chips appropriately and discharge them.
- the raised portions 22a and 22b both extend along the second cutting edge 52 with a space between the second cutting edge 52 on the adjacent side. Further, the vertical bisector L intersects with the central axis S in a top view.
- the tops of the pair of raised portions 22, 22 have at least two protrusions 23, 23 in the direction along the perpendicular bisector L in the top view.
- protrusions 231 and 232 extending in the direction along the perpendicular bisector L are provided on the tops of the protruding portions 22 a and 22 b, respectively.
- the protrusion 23 is positioned on the side closest to the vertical bisector L, and on the side farther from the vertical bisector L than the first protrusion 231.
- a second protrusion 232 positioned higher than the first protrusion 231. That is, as shown in FIG. 3, the first protrusion 231 is positioned closer to the perpendicular bisector L than the second protrusion 232, and as shown in FIG. It is located higher than the first protrusion 231.
- the high level means that it exists at a higher position in the thickness direction of the insert 1 than the comparison target.
- the second protrusion 232 when the insert 1 is placed on a horizontal plane with the lower surface 3 as a mounting surface, the second protrusion 232 is positioned higher than the first cutting edge 51.
- the second protrusion 232 is positioned higher than the first protrusion 231 with the insert 1 attached to the holder 11. Good.
- the chips can be deformed and hardened by the first protrusions, and the second protrusions 232 can suppress the movement of the chips in the left-right direction in the discharge direction.
- a difference occurs in the cutting speed between the right end portion and the left end portion of the first cutting edge 51.
- the curl diameters at the right end portion and the left end portion of the generated chips are different. Is discharged spirally. In this case, the chips are inclined and discharged to either the left or right, but the chips are stably supported by the first protrusion 231 and the second protrusion 232 of either one of the raised portions 22a and 22b. Can do.
- the distance between the first protrusion 231 of the raised portion 22a and the first protrusion 231 of the raised portion 22b is preferably smaller as the distance from the first cutting edge 51 increases.
- the distance between the first protrusions 231 and 231 in FIG. 4A is wa
- the distance between the first protrusions 231 and 231 in FIG. 4B is wb
- FIG. 4 The relationship between the first protrusions 231 and 231 is wc> wb> wc.
- FIG. 4A shows a cross section passing through the second rake portion 251 of the concave groove 25, and FIG. 4B shows a cross section passing through a flat portion at the bottom of the concave groove 25, and FIG. ) Shows a cross section passing through the central inclined portion 24.
- At least one of the pair of raised portions 22 has a height of the first protrusion 231 and a second protrusion. It is preferable that the difference from the height of 232 increases as the distance from the first cutting edge 51 increases. In the present embodiment, in any of the pair of raised portions 22, the difference between the height of the first protrusion 231 and the height of the second protrusion 232 increases as the distance from the first cutting edge 51 increases. Specifically, the difference between the height of the first protrusion 231 and the height of the second protrusion 232 in FIG.
- At least one of the pair of raised portions 22 includes the top portion of the first protrusion 231 and the second protrusion. It is preferable that an angle formed by a straight line R connecting the top of 232 and a horizontal plane H corresponding to a perpendicular of the central axis S is set to 1 to 10 °. Thereby, cutting resistance can be suppressed while ensuring the strength of the first protrusion 231 and the second protrusion 232. In the vicinity of the first cutting edge 51, the angle may be set to 0 ° in accordance with the first cutting edge 51. For example, in FIG.
- ⁇ 1 is 0 ° 30′ ⁇ It is preferably set to 5 °.
- an angle formed by a straight line R connecting the top of the first protrusion 231 and the top of the second protrusion 232 in FIG. 4B and the horizontal plane H is ⁇ 2, and the first angle in FIG.
- ⁇ 1 to ⁇ 3 preferably have a relationship of ⁇ 1 ⁇ 2 ⁇ 3.
- ⁇ 1 to ⁇ 3 are not limited to the above numerical range.
- the first protrusion 231 and the second protrusion 232 are continuous through the surface.
- This surface may be a flat surface or a curved surface, and is not particularly limited, but is provided to be positioned lower than the straight line R.
- the term “low” means that it is present at a lower position in the thickness direction of the insert 1 than the comparison object unless otherwise specified. More specifically, it is defined in the same manner as the high level described above.
- the first protrusion 231 and the second protrusion 232 have a curved surface 233 that curves toward the lower surface 3. Is continuous through.
- the pair of raised portions 22 a and 22 b are both provided continuously to the first cutting edge 51. This makes it easier for chips to be discharged more stably from the cutting edge.
- the raised portion 22 has a first rake portion 221 on the tip side as shown in FIG.
- the first rake part 221 is a horizontal plane H including at least a part of the intersecting part (first cutting edge 51), and is formed by the virtual extension line P of the first rake part 221 and the horizontal plane H.
- the rake angle ⁇ is the rake angle ⁇ , the rake angle when the virtual extension line P is above the horizontal plane H in the cross-sectional view parallel to the central axis S and perpendicular to the first cutting edge 51 is positive, If the rake angle is negative, ⁇ ⁇ 0 ° is provided.
- the first rake portion 221 is inclined downward at an inclination angle ⁇ as it is away from the first cutting edge 51 with respect to the horizontal plane H.
- the horizontal surface H is represented by the straight line.
- the horizontal plane H corresponds to a plane perpendicular to the central axis S.
- the rake angle ⁇ is preferably set to 0 to 10 °, for example.
- the raised portion 22 is continuous with the first rake portion 221 in a cross-sectional view that is parallel to the central axis S and perpendicular to the first cutting edge 51, and is lower as the distance from the first cutting edge 51 increases.
- the first inclined surface 222 is inclined so as to be away from 3.
- the first inclined surface 222 is a process that performs cutting using the portion from the end to the center of the first cutting edge 51 in order to increase the groove width of the processed groove (hereinafter referred to as “shoulder groove processing”). )), It serves as a breaker, so that the chips are curled and easily divided into fine pieces and are easily discharged well.
- the raised portion 22 is continuous with the first inclined surface 222 in a cross-sectional view that is parallel to the central axis S and perpendicular to the first cutting edge 51, and is lower as the distance from the first cutting edge 51 increases.
- a second inclined surface 223 that is inclined at a smaller angle than the first inclined surface 222, that is, the amount of change in the distance from the lower surface 3 is smaller than that of the first inclined surface 222 and is gentle. Yes.
- “rear” means a direction from the first cutting edge 51 toward the clamp surface 28 unless otherwise specified.
- the second inclined surface 223 is a concave curved surface, and it is preferable that the second inclined surface 223 is composed of, for example, one surface with a radius of curvature of 2 mm to 8 mm.
- the upper surface 2 is provided with a central inclined portion 24 that is inclined so as to become higher as the distance from the first cutting edge 51 extends between the pair of raised portions 22 a and 22 b. ing. And as shown in FIG.4 (c), the center inclination part 24 is located in the low position rather than the 1st protrusion 231. FIG. With this configuration, the central portion of the chips can be supported from below by the central inclined portion 24, so that the chips can be more stably discharged.
- the distance between the central inclined portion 24 and the first cutting edge 51 may be set as appropriate depending on the size of the insert 1 and the cutting conditions, and is not particularly limited.
- the central inclined portion 24 is located in the central portion of the upper surface 2 as shown in FIG. 3 from the viewpoint of easily determining the diameter of the chip curl.
- the end 241 located on the far side from the first cutting edge 51 in the central inclined portion 24, in other words, the higher end 241 of the central inclined portion 24 is the second inclined surface. 223.
- a straight line passing through the central inclined portion 24 and parallel to the first cutting edge 51 is a straight line N
- a part of the second inclined surface 223 is a straight line in a top view. Located on N.
- the center portion of the chip can be curled by the concave groove 25 and the end portion of the chip can be curled by the second inclined surface 223, so that the diameter of the chip curl can be easily determined.
- the expression “corresponding” described above means that a part of the other part is located on a straight line passing through one part unless otherwise specified.
- the height of the central inclined portion 24 is only required to be lower than that of the first projecting portion 231 and may be appropriately set depending on the size of the insert 1 and cutting conditions.
- the second projecting portion 232 and the central inclined portion 24 pass through the higher end portion 241 of the central inclined portion 24, are parallel to the first cutting edge 51, and are viewed in a vertical sectional view. It is preferable that the difference in height from the higher end 241 is smaller than the depth of the recess 511 of the first cutting edge 51.
- the end 241 and the second protrusion located on the far side from the first cutting edge 51 in the central inclined portion 24.
- the difference in height from H.232 is preferably smaller than the depth of the recess 511.
- the depth of the recess 511 of the first cutting edge 51 in FIG. 5A is set to h 511, and the higher end of the second protrusion 232 and the central inclined portion 24 in FIG. 5B. If the height difference from H.sub.241 is h.sub.241, h.sub.241 ⁇ h.sub.511 . With this configuration, the chips are surely brought into contact with the central inclined portion 24, and the curl diameter of the chips can be easily determined.
- the depth means a difference in height between a point at which the distance from the lower surface 3 is the smallest and a point at which the distance from the lower surface 3 is the largest, unless otherwise specified. .
- the upper surface 2 is provided with a groove 25 between the pair of raised portions 22a and raised portions 22b.
- the concave groove 25 is provided so as to overlap the vertical bisector L, and is provided so as to be symmetric with respect to the vertical bisector L.
- the concave portion 511 and the concave groove 25 of the first cutting edge 51 are continuous.
- the concave groove 25 has a second rake portion 251 at the end on the concave portion 511 side. Specifically, as shown in FIG. 7, if the angle between the virtual extension line Q of the second rake portion 251 and the horizontal plane H is a rake angle ⁇ , ⁇ > 0 ° may be satisfied.
- the second scooping portion 251 in a cross-sectional view parallel to the central axis S and perpendicular to the first cutting edge 51, the second scooping portion 251 has the first cutting edge with reference to a horizontal plane H corresponding to a plane perpendicular to the central axis S. As it moves away from the blade 51, it is inclined downward at an inclination angle ⁇ .
- the rake angle ⁇ is positive, the first cutting edge 51 easily bites into the work material and the cutting resistance is reduced, so that chatter vibration is suppressed and machining accuracy is improved.
- the rake angle ⁇ is preferably set to 10 ° to 20 °, for example.
- the magnitude relationship between the rake angle ⁇ and the rake angle ⁇ is ⁇ ⁇ .
- the concave groove 25 has a protruding portion 252 in which each end on the pair of raised portions 22 and 22 protrudes toward the pair of raised portions 22 in a top view. Yes.
- a force acts in the width direction of the chip even in the center portion of the chip, so that deformation in the width direction of the chip can be promoted better.
- the projecting portion 252 serves as a breaker, and the chips are curled and divided, so that the chip discharge performance is improved.
- the protruding portion 252 is preferably located corresponding to the central inclined portion 24. Specifically, as shown in FIG. 3, a part of the protruding portion 252 is located on the straight line N. With this configuration, the chips can be deformed in the width direction almost simultaneously with the curling of the chips by the central inclined portion 24. As a result, the chip discharge performance can be further improved.
- the raised portion 22 is located on the side near the first cutting edge 51 in the outer side near the second cutting edge 52 in the top view, and is inward of the second cutting edge 52.
- the rake part (first rake face 21a) with respect to the first cutting edge 51 intersects with the rake part (second rake face 21b) with respect to the second cutting edge 52 at a position corresponding to the recess 26 on the upper surface 2.
- a concave portion (not shown) is formed.
- chips having a relatively small curl diameter and finely divided are generated by the concave portion and the concave portion 26 described above, so that the chip dischargeability can be improved.
- the chips are curled and divided by the projecting portion 27, so that the chips can be discharged well.
- the inward means a direction toward the center of the upper surface 2 with respect to the cutting edge 5 in the top view, and the outward is opposite to the inward. It means the direction of the direction.
- the end 241 ′ located on the far side from the first cutting edge 51 ′ of the central inclined portion 24 ′ in other words, the end 241 ′ on the higher side of the central inclined portion 24 ′ is the second inclined. It is preferable that the upper end portion 223′u of the surface 223 ′ is collinear with the upper end portion 223′u of the second inclined surface 223 ′.
- the end 241 ′ on the higher side of the central inclined portion 24 ′ and the end 223′u on the higher side of the second inclined surface 223 ′ are located on the same straight line. is doing. That is, if the straight line N ′ that passes through the central inclined portion 24 ′ and is parallel to the first cutting edge 51 ′ is parallel to the direction away from the first cutting edge 51 ′, the straight line N′1 is the central inclination. The end 241 ′ on the higher side of the part 24 ′ and the end 223′u on the higher side of the second inclined surface 223 ′ are located on the same straight line N′1.
- the center inclined portion 24 ′ For example, under high-load cutting conditions such as when the feed rate is high, only the center portion of the chip is supported by the center inclined portion 24 ′ and does not come into contact with the second inclined surface 223 ′, so that the diameter of the chip curl is increased. It may be difficult to determine the chip discharge direction. In such a case, as in the present embodiment, the position of the highest inclined portion (223′u) of the second inclined surface 223 ′ and the highest portion of the central inclined portion 24 ′ (241 ′) coincide. By doing so, the chips are supported by the central inclined portion 24 ′ and the second inclined surface 223 ′ so that the diameter of the curl of the chips can be easily determined, and the discharge direction of the chips can be stabilized. it can.
- the height of the central inclined portion 24 ′ may be lower than that of the first projecting portion 231 ′, and may be appropriately set depending on the size of the insert 1 ′ and the cutting conditions.
- the second protrusion 232 ′ and the center in the vertical sectional view pass through the higher end 241 ′ of the central inclined portion 24 ′, parallel to the first cutting edge 51 ′.
- the difference in height between the inclined portion 24 ′ and the higher end portion 241 ′ is preferably larger than the depth of the concave portion 511 ′ of the first cutting edge 51 ′.
- an end 241 ′ located on the far side from the first cutting edge 51 ′ in the central inclined portion 24 ′ The difference in height from the second protrusion 232 ′ is preferably larger than the depth of the recess 511 ′.
- the depth of the recess 511 ′ of the first cutting edge 51 ′ in FIG. 11 (a) is h 511 ′
- the second protrusion 232 ′ and the central inclined portion 24 ′ is h 241 ′
- h 241 ′ > h 511 ′ .
- the inserts 1, 1 ′ can be used for any of grooving with an inner diameter, grooving with an outer diameter, parting off, and end face grooving.
- a cutting tool according to an embodiment of the present invention a cutting tool 10 to which the insert 1 is mounted will be described with reference to FIG. 12 taking as an example a case where the insert 1 is used for end face grooving.
- the cutting tool 10 of this embodiment includes an insert 1 and a prismatic holder 11 having a clamping portion 12 that clamps the insert 1 at the tip.
- the insert 1 is attached to the distal end portion of the holder 11 so that the insert 1 is sandwiched with the cutting blade 5 protruding from the distal end of the sandwiching portion 12.
- the fixing of the insert 1 to the holder 11 can be performed as follows, for example. As shown in FIG. 12, first, the insert 1 is moved in the direction of arrow a, and the insert 1 is inserted between the upper jaw portion 12a and the lower jaw portion 12b of the sandwiching portion 12. Next, the screw 13 is tightened, and the upper jaw portion 12a is elastically deformed and pushed down. As a result, the insert 1 is pressed against the lower jaw portion 12b and sandwiched and fixed between the upper jaw portion 12a and the lower jaw portion 12b.
- the upper jaw portion 12a is more easily elastically deformed by the slit 12c, and the tip of the upper jaw portion 12a can be pushed down more easily.
- the lower jaw portion 12b is curved along the outer periphery and the inner periphery of the processing groove in the front end view.
- an annular groove is formed in the end face grooving.
- the lower jaw portion 12b becomes a machining groove during machining. Contact. Accordingly, the machining diameter is determined in advance, and the lower jaw portion 12b is curved along the outer circumference and the inner circumference of the machining groove.
- the holder 11 and the sandwiching portion 12 are integrally formed from the viewpoint of improving durability, but the sandwiching portion 12 and the holder 11 may be detachable.
- the restraint force is adjusted with the screw 13 provided in the front-end
- FIG. 10 ⁇ Manufacturing method of cut product>
- the cutting tool 10 will be described as an example. Since this embodiment is end face grooving, an annular groove 101 is formed on the end face of the work material 100 as shown in FIG. A part of the work material 100 shown in FIGS. 13A to 13C is shown in cross-sectional view.
- the method for manufacturing a cut product includes the following steps (i) to (iv).
- Iv A step of moving the cutting tool 10 in the arrow Z direction to separate the cutting tool 10 from the cut workpiece 100 as shown in FIG.
- the cut workpiece 110 shown in FIG. 13D is manufactured through the above steps.
- the work material 100 and the cutting tool 10 may be relatively close to each other.
- the work material 100 may be close to the cutting tool 10.
- the work material 100 and the cutting tool 10 may be relatively separated from each other.
- the work material 100 may be separated from the cutting tool 10.
- in the process (iii) in the grooving process, a process for forming a groove is performed and a transverse feed process is performed. When cutting is continued, the process of bringing the cutting edge 5 of the cutting tool 10 into contact with a different part of the work material 100 may be repeated while maintaining the state where the work material 100 is rotated.
- the material of the work material 100 include carbon steel, alloy steel, stainless steel, cast iron, and non-ferrous metal.
- the left-handed holder 11 has been described, but a right-handed holder 11 may be used.
- the pair of raised portions 22 and 22 have the same configuration, but instead, the pair of raised portions 22 and 22 may have different configurations.
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Abstract
Description
以下、本発明の実施形態に係る切削インサート(以下、「インサート」と言うことがある。)について、図1~図11を用いて詳細に説明する。本発明のインサートは、内径の溝入れ加工、外径の溝入れ加工、突切り加工および端面溝入れ加工のいずれにも使用することができる。以下の説明においては、特記しない限り、本発明のインサートを端面溝入れ加工に使用する場合を例に挙げて説明する。
以下、本発明のインサートに係る第1実施形態について、図1~図7を用いて詳細に説明する。
図1に示すように、本実施形態のインサート1は、角柱状であり、両端部に位置している切削部I、Iと、切削部I、Iの間に位置し、後述するホルダ11に固定される際に、ホルダ11と接するクランプ面28を有するクランプ部IIとを備えている。すなわち、切削部Iは、クランプ部IIの両端に対で設けられている。本実施形態においては、図1に示すように、切削部Iを識別するため、一対の切削部I、Iのうち、どちらか一方に目印Mを付けている。
次に、本発明の第2実施形態に係るインサートについて、図8~図11を用いて詳細に説明する。なお、図8~図11においては、上述した図1~図7と同一の構成部分には同一の符号を付して説明は省略する。
その他の構成は、上述した第1実施形態に係るインサート1と同様であるので、説明を省略する。
インサート1,1’は、内径の溝入れ加工、外径の溝入れ加工、突切り加工用および端面溝入れ加工のいずれにも使用することができる。
本発明の実施形態に係る切削工具として、インサート1を装着した切削工具10について、インサート1を端面溝入れ加工に使用する場合を例に挙げ、図12を参照して説明する。
次に、本発明の実施形態に係る切削加工物の製造方法を、図13を用いて説明する。本実施形態においては、切削工具10を例にとって説明する。
本実施形態は、端面溝入れ加工であるため、図13(d)に示すように、被削材100の端面には、環状の溝101が形成される。なお、図13(a)~(c)に示された被削材100は、一部を断面図で記載している。
(i)図13(a)に示すように、略円柱状の被削材100を、回転軸102を中心に矢印X方向に回転させる工程。
(ii)切削工具10を矢印Y方向に動かし、回転している被削材100に切削工具10を近接させる工程。
(iii)図13(b)に示すように、回転している被削材100に切削工具10の切刃5を接触させて被削材100を切削する工程。
(iv)図13(c)に示すように、切削工具10を矢印Z方向に動かし、切削した被削材100から切削工具10を離隔する工程。
なお、(i)の工程では、被削材100と切削工具10とは相対的に近づけばよく、例えば被削材100を切削工具10に近づけてもよい。これと同様に、(iv)の工程では、被削材100と切削工具10とは相対的に離隔すればよく、例えば被削材100を切削工具10から離隔してもよい。また、(iii)の工程においては、溝入れ加工の際には、溝を形成する加工が行なわれるとともに、横送り加工が行なわれる。
切削加工を継続する場合には、被削材100を回転させた状態を保持したまま、被削材100の異なる箇所に切削工具10の切刃5を接触させる工程を繰り返せばよい。
被削材100の材質としては、例えば、炭素鋼、合金鋼、ステンレス、鋳鉄、非鉄金属などが挙げられる。
Claims (17)
- 上面と、
側面と、
前記上面と前記側面との交線部に位置している第1切刃と、を備え、
前記上面は、前記第1切刃の垂直二等分線を挟んで互いに対向するように位置している一対の***部を有し、
上面視において、前記一対の***部のそれぞれの頂部は、前記垂直二等分線に沿う方向に向かって少なくとも2つの突部を有し、
前記少なくとも2つの突部は、
前記垂直二等分線に最も近い側に位置している第1突部と、
前記第1突部よりも前記垂直二等分線から遠い側に位置しているとともに、前記第1突部よりも高位に位置している第2突部と、を有する、切削インサート。 - 前記上面と前記側面との交線部に位置しているとともに、前記第1切刃に交差している第2切刃をさらに備え、
前記一対の***部のうち少なくとも一方は、前記第2切刃との間に間隔をおいて前記第2切刃に沿って延びている、請求項1に記載の切削インサート。 - 上面視において、前記一対の***部のそれぞれの前記第1突部間の距離は、前記第1切刃から離れるにつれて小さくなっている、請求項1または2に記載の切削インサート。
- 下面をさらに備え、
前記上面および前記下面の間を貫通する中心軸に平行であり且つ前記第1切刃に平行な断面視において、前記一対の***部のうち少なくとも一方は、前記第1突部の高さと前記第2突部の高さとの差が、前記第1切刃から離れるにつれて大きくなっている、請求項1~3のいずれかに記載の切削インサート。 - 下面をさらに備え、
前記上面および前記下面の間を貫通する中心軸に平行であり且つ前記第1切刃に平行な断面視において、前記一対の***部のうち少なくとも一方は、前記第1突部および前記第2突部のそれぞれの頂部間を結ぶ直線と、前記中心軸の垂線とのなす角の角度が、1~10°である、請求項1~4のいずれかに記載の切削インサート。 - 側面視において、前記第1切刃は、中央部に向かうにつれて低位となるように傾斜している凹部を有する、請求項1~5のいずれかに記載の切削インサート。
- 前記一対の***部はいずれも、前記第1切刃に連続している、請求項1~6のいずれかに記載の切削インサート。
- 前記上面は、前記一対の***部の間に位置するとともに、前記第1切刃から離れるにつれて高位となるように傾斜している中央傾斜部をさらに有し、
前記中央傾斜部は、前記第1突部よりも低位に位置している、請求項1~7のいずれかに記載の切削インサート。 - 下面をさらに備え、
前記上面および前記下面の間を貫通する中心軸に平行であり且つ前記第1切刃に平行な断面視において、前記中央傾斜部のうち前記第1切刃から遠い側に位置している端部と前記第2突部との高さの差は、前記凹部の深さよりも大きい、請求項8に記載の切削インサート。 - 前記一対の***部のうち少なくとも一方は、前記第1切刃から離れるにつれて高位となるように傾斜している傾斜面をさらに有し、
上面視において、前記中央傾斜部のうち前記第1切刃から遠い側に位置している端部は、前記傾斜面のうち前記第1切刃から遠い側に位置している端部と同一直線上に位置しているか、または前記傾斜面の前記端部よりも後方に位置している、請求項8または9に記載の切削インサート。 - 前記傾斜面は、
前記第1切刃側に位置している第1傾斜面と、
前記第1傾斜面よりも後方に位置するとともに、前記第1傾斜面よりも小さな角度で傾斜している第2傾斜面と、を有する、請求項10に記載の切削インサート。 - 前記第2傾斜面は、前記第1傾斜面に連続しているとともに、凹状の曲面である、請求項11に記載の切削インサート。
- 前記上面は、前記一対の***部の間であって、前記第1切刃と前記中央傾斜部との間に位置している凹溝をさらに有する、請求項1~12のいずれかに記載の切削インサート。
- 前記凹溝は、前記第1切刃の前記凹部に連続している、請求項13に記載の切削インサート。
- 下面をさらに備え、
前記上面は、
前記第1切刃と前記一対の***部のうち少なくとも一方との間に位置し、前記上面および前記下面の間を貫通する中心軸に垂直な平面を基準にして前記第1切刃から離れるにつれて下方に傾斜角度βで傾斜している第1すくい部と、
前記凹溝のうち前記第1切刃側の端部に位置し、前記中心軸の前記平面を基準にして前記第1切刃から離れるにつれて下方に傾斜角度γで傾斜している第2すくい部と、をさらに有し、
前記傾斜角度βは、前記傾斜角度γよりも小さい、請求項13または14に記載の切削インサート。 - 請求項1~15のいずれかに記載の切削インサートと、
前記切削インサートが先端部に取り付けられるホルダと、を備える、切削工具。 - 被削材を回転させる工程と、
回転している前記被削材と請求項16に記載の切削工具の前記第1切刃とを接触させる工程と、
前記切削工具と前記被削材とを離隔する工程と、
を備える、切削加工物の製造方法。
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EP11829182.2A EP2623236B1 (en) | 2010-09-29 | 2011-09-28 | Cutting insert, cutting tool with said cutting insert, and method for producing cut product using said cutting tool |
JP2012536506A JP5639656B2 (ja) | 2010-09-29 | 2011-09-28 | 切削インサートおよび切削工具、並びにそれらを用いた切削加工物の製造方法 |
US13/876,671 US9272336B2 (en) | 2010-09-29 | 2011-09-28 | Cutting insert, cutting tool, and method of manufacturing machined product using them |
CN201180046289.5A CN103118822B (zh) | 2010-09-29 | 2011-09-28 | 切削镶刀及切削工具、以及使用该切削工具的切削加工物的制造方法 |
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JP2015051485A (ja) * | 2013-09-09 | 2015-03-19 | 住友電工ハードメタル株式会社 | 切削インサート |
US10029311B2 (en) | 2013-10-29 | 2018-07-24 | Kyocera Corporation | Cutting insert, cutting tool, and method of manufacturing machined product using them |
WO2015064559A1 (ja) * | 2013-10-29 | 2015-05-07 | 京セラ株式会社 | 切削インサート及び切削工具、並びにそれらを用いた切削加工物の製造方法 |
JPWO2015064559A1 (ja) * | 2013-10-29 | 2017-03-09 | 京セラ株式会社 | 切削インサート及び切削工具、並びにそれらを用いた切削加工物の製造方法 |
WO2016067547A1 (ja) * | 2014-10-28 | 2016-05-06 | 日本特殊陶業株式会社 | 切削インサート |
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JPWO2017043520A1 (ja) * | 2015-09-07 | 2018-07-05 | 京セラ株式会社 | 切削インサート、切削工具及び切削加工物の製造方法 |
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JP7275149B2 (ja) | 2018-02-28 | 2023-05-17 | イスカル リミテッド | 離間した上方膨出ランド部分を伴うランドを有する切削インサート、及び切削インサートを備える非回転切削工具 |
Also Published As
Publication number | Publication date |
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EP2623236A4 (en) | 2015-10-14 |
JP5639656B2 (ja) | 2014-12-10 |
EP2623236A1 (en) | 2013-08-07 |
EP2623236B1 (en) | 2020-04-22 |
CN103118822A (zh) | 2013-05-22 |
CN103118822B (zh) | 2015-04-22 |
US9272336B2 (en) | 2016-03-01 |
JPWO2012043629A1 (ja) | 2014-02-24 |
US20130192431A1 (en) | 2013-08-01 |
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