WO2012020784A1 - 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
- Publication number
- WO2012020784A1 WO2012020784A1 PCT/JP2011/068220 JP2011068220W WO2012020784A1 WO 2012020784 A1 WO2012020784 A1 WO 2012020784A1 JP 2011068220 W JP2011068220 W JP 2011068220W WO 2012020784 A1 WO2012020784 A1 WO 2012020784A1
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- WIPO (PCT)
- Prior art keywords
- cutting
- cutting edge
- cutting insert
- insert
- restraining
- 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
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
-
- 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
-
- 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
- B23C5/109—Shank-type cutters, i.e. with an integral shaft with removable cutting inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
- B23C5/202—Plate-like cutting inserts with special form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2200/00—Details of milling cutting inserts
- B23C2200/04—Overall shape
- B23C2200/0494—Rectangular
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2200/00—Details of milling cutting inserts
- B23C2200/12—Side or flank surfaces
- B23C2200/125—Side or flank surfaces discontinuous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2200/00—Details of milling cutting inserts
- B23C2200/12—Side or flank surfaces
- B23C2200/128—Side or flank surfaces with one or more 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
- Y10T407/19—Rotary cutting tool
- Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
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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
- Y10T407/19—Rotary cutting tool
- Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
- Y10T407/1908—Face or end mill
- Y10T407/1924—Specified tool shape
-
- 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
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/303752—Process
- Y10T409/303808—Process including infeeding
Definitions
- the present invention relates to a cutting insert, a cutting tool, and a manufacturing method of a cut product using them.
- Japanese Patent Publication No. 2008-544872 discloses a reversible cutting insert that is square when viewed from above.
- the above-mentioned cutting insert uses the main edge of the main side surface corresponding to each side of the square and the auxiliary edge of the auxiliary side surface formed by cutting out the corner portion. Cutting a workpiece is described.
- the workpiece surface is cut using the auxiliary edge of the auxiliary side surface that is flat, it is difficult to ensure a sufficient clearance angle between the auxiliary side surface and the workpiece surface. Can occur. Therefore, the contact between the auxiliary side surface and the workpiece surface may reduce the roughness of the finished surface of the workpiece surface, or the auxiliary side surface may be worn out and cannot perform a desired function when reversible.
- One of the objects of the present invention is to provide a cutting insert and a cutting tool that have a reduced cutting resistance and a long life, and a method of manufacturing a cut product using them.
- the cutting insert which concerns on one Embodiment of this invention is connected to each of the upper surface, a lower surface, the said upper surface, and the said lower surface, the side surface which has the 1st side surface and 2nd side surface which mutually adjoined, and the said upper surface A cutting edge having a main cutting edge located at the intersection of the first side surface and a secondary cutting edge located at the intersection of the upper surface and the second side,
- the upper surface has a rake face that is positioned along the main cutting edge and is inclined downward as it is away from the main cutting edge, and the second side surface is directed from the upper surface toward the lower surface, the upper surface and A second upper restraining surface that is inclined inward at an inclination angle ⁇ 1 with respect to a central axis that passes between the lower surfaces, and is inclined outwardly at an inclination angle ⁇ 2 that is continuous with the second upper restricting surface. It has a 2nd lower restraint surface in order.
- the cutting tool which concerns on one Embodiment of this invention is equipped with the cutting insert which concerns on embodiment mentioned above, and the holder to which the said cutting insert is attached,
- the said holder is a seating surface contact
- the manufacturing method of the cut workpiece which concerns on one Embodiment of this invention WHEREIN The process of rotating the cutting tool which concerns on embodiment mentioned above, The process of contacting the said cutting blade of the said cutting tool which is rotating with a workpiece And a step of separating the cutting tool from the work material.
- the second side surface is inclined inward from the upper surface toward the lower surface at an inclination angle ⁇ 1 with reference to the central axis passing between the upper surface and the lower surface. Since the second upper constraining surface and the second lower constraining surface that are continuous with the second upper constraining surface and are inclined outward at an inclination angle ⁇ 2 are sequentially provided, the cutting insert is advanced in the rotation direction of the holder when attached to the holder. It is possible to ensure a relatively large clearance angle between the second side surface and the finished surface of the work material without tilting forward in the direction side. In other words, it is possible to ensure a relatively large axial rake angle of the main cutting edge without tilting the cutting insert forward. Therefore, since the inclination of the main cutting edge when the cutting insert itself is viewed from the side can be set to be relatively small, as a result, there is an advantage that it is not necessary to excessively increase the thickness of the cutting insert.
- FIG.1 (a) is a perspective view
- (b) is a top view (top view)
- (c) is the side seen from the arrow a direction of (b).
- the figure (2nd side surface side) and (d) are the side views (1st side surface side) seen from the arrow b direction of (b).
- (A) And (b) is an enlarged view of FIG.1 (c), respectively. It is an enlarged view of FIG.1 (d).
- FIG. 4A is an enlarged view of FIG. 4D
- FIG. 4B is an enlarged sectional view taken along line EE of FIG. 5A is an enlarged sectional view taken along line AA in FIG. 5A
- FIG. 5B is an enlarged sectional view taken along line BB in FIG. 5A
- FIG. 5C is a sectional view taken along line C--B in FIG.
- FIG. 5D is an enlarged cross-sectional view taken along line C
- FIG. 5D is an enlarged cross-sectional view taken along line DD in FIG. (A) is an enlarged view of FIG.4 (c), (b) is an enlarged view of FIG.4 (b).
- FIG. 9 is a diagram illustrating the cutting insert of FIG. 8, (a) is a plan view (top view), (b) is an enlarged cross-sectional view taken along line AA of (a), and (c) is BB of (a).
- (D) is an enlarged sectional view taken along the line CC of (a), and (e) is an enlarged sectional view taken along the line DD of (a).
- (a) is a side view
- (b) is the side view seen from the angle different from (a), ie, (a) is 90 degree
- a rotated side view that is, a side view when (a) is viewed from below
- (c) is a front view.
- (a) is a perspective view
- (b) is a side view.
- (A) is the elements on larger scale which expand and show the front-end
- a first embodiment of a cutting insert of the present invention (hereinafter sometimes referred to as “insert”) will be described in detail with reference to FIGS. 1 to 3.
- the insert 1 of the present embodiment generally penetrates between the upper surface 2, the lower surface 3, the side surface 4 connected to each of the upper surface 2 and the lower surface 3, and the upper surface 2 and the lower surface 3.
- the through-hole 6 and the cutting blade 5 located in the intersection part of the upper surface 2 and the side surface 4 are provided.
- the upper surface 2 has a rake surface 8 and a rising surface 9, and a flat surface 21, the side surface 4 has a first side surface 41 and a second side surface 42 that are adjacent to each other, and the cutting blade 5 has a main cutting edge 51 and an auxiliary surface. A cutting edge 52 is provided.
- each component of the insert 1 will be described in order.
- the insert 1 has a substantially quadrangular shape (substantially rectangular shape) when viewed from above.
- the top view means a state in which the insert 1 is viewed from the top surface 2 side unless otherwise specified.
- the shape of the insert 1 is not limited to a substantially square shape, and may be a substantially polygonal plate shape such as a triangle, pentagon, hexagon, or octagon when viewed from above.
- the insert 1 may have a substantially rectangular long side in the top view of about 8 to 15 mm, a short side of about 4 to 8 mm, and the thickness from the top surface 2 to the bottom surface 3 of about 3 to 7 mm, for example. do it.
- the thickness means a line segment parallel to the central axis S1 of the insert 1 in the distance from the uppermost portion of the upper surface 2 to the lowermost portion of the lower surface 3 in a side view.
- the center axis S1 of the insert 1 is an axis that penetrates between the upper surface 2 and the lower surface 3, and means an axis that becomes a rotation axis when the insert 1 is rotated in a top view.
- the insert 1 has a cutting edge 5A having a main cutting edge 51A and a sub cutting edge 52A at the intersection of the lower surface 3 and the side surface 4 as well as the upper surface 2 side. I have.
- the flat surface 21 of the upper surface 2 can be used as a seating surface on the holder 10 described later. That is, since the insert 1 of this embodiment can use each of the upper surface 2 side and the lower surface 3 side for cutting, the main cutting edge 51A on the lower surface 3 side can be used in a state where the insert 1 is turned upside down. Thus, the main cutting edge 51 on the upper surface 2 side is inverted.
- the insert 1 is rotationally symmetric about a line perpendicular to the paper surface of FIG. Therefore, in the insert 1 according to the present embodiment, cutting can be performed using two corners on each of the upper surface 2 and the lower surface 3, for a total of four corners.
- the cutting blade 5 is located at the intersection of the upper surface 2 and the side surface 4 as described above, and has a main cutting blade 51 and a sub cutting blade 52.
- the main cutting edge 51 and the auxiliary cutting edge 52 are connected via a corner cutting edge 53.
- the insert 1 of this embodiment can perform cutting using a corner including a main cutting edge 51, a sub cutting edge 52, and a corner cutting edge 53.
- the main cutting edge 51 is located at the intersection of the upper surface 2 and the first side face 41, and is a blade that plays a main role in generating chips in the cutting action.
- the main cutting edge 51 has a gently convex curve toward the outside as it is farther from the sub cutting edge 52 side in a top view, as shown in FIG. In the side view, it is inclined downward as it moves away from the auxiliary cutting edge 52 side.
- the inclination angle of the main cutting edge 51 in a side view gradually decreases as the main cutting edge 51 moves away from the sub cutting edge 52 side.
- the inclination angle in the side view may be set to zero at the end portion of the main cutting edge 51 farthest from the sub cutting edge 52.
- the auxiliary cutting edge 52 is located at the intersection of the upper surface 2 and the second side surface 42, and is a blade having a role of smoothing a finished surface 102 of the work material 100 described later.
- the auxiliary cutting edge 52 is linear when viewed from the side of the second side face 42 as shown in FIG. 1 (c), and the top face as shown in FIG. 1 (b). It is also linear in view.
- the corner cutting edge 53 is sandwiched between the main cutting edge 51 and the auxiliary cutting edge 52 and has a comparatively gentle curved shape. It has the role of suppressing defects at the intersection with the cutting edge 52.
- the upper surface 2 has a rake face 8 that is positioned along the main cutting edge 51 and that is inclined downward as the distance from the main cutting edge 51 increases.
- a flat surface that is perpendicular to the central axis S1 in a side view and is at least partially above the main cutting edge 51 at a site around the through-hole 6) and separated from the main cutting edge 51. 21.
- the side view means a state in which the insert 1 is viewed toward the first side surface 41 unless otherwise specified.
- the rake face 8 is a part having a role of smoothly discharging chips to the outside by making contact with the chips generated by the main cutting edge 51 at the time of cutting and causing deformation of the chips or change of the traveling direction. .
- the rake face 8 may be continuous with the main cutting edge 51 or may be formed via a so-called land portion. Further, the rake face 8 may have a flat part or a curved part.
- the term “planar” means not only a plane in a strict sense, but also includes some unevenness and curvature as long as the function is achieved. This also applies to the curved surface.
- the flat surface 21 is a part having a function as a seating surface when attached to the holder 10. Furthermore, in the present embodiment, as shown in FIG. 1A, the upper surface 2 is located continuously with at least a part of the rake face 8 and rises upward as it is away from the main cutting edge 51. 9. The first end portion 8 a located on the side of the rake face 8 far from the auxiliary cutting edge 52 is continuous with the flat surface 21 via the rising surface 9, and the auxiliary cutting edge 52 of the rake face 8 is continuous. The second end portion 8 b located on the side closer to is continuous with the flat surface 21.
- the inner region 52 d of the auxiliary cutting edge 52 does not have a portion inclined upward like the above-described rising surface 9, and the above-described rake surface 8 does not exist.
- the corresponding part and the flat surface 21 are continuous.
- the through-hole 6 is a hole for inserting a tightening screw or a mounting bolt when the insert 1 is attached to the holder 10.
- the through hole 6 is located at the center of the upper surface 2.
- the central axis of the through hole 6 and the central axis S1 of the insert 1 are located at the same position.
- description of the lower surface 3 is abbreviate
- the side surface 4 is connected to each of the upper surface 2 and the lower surface 3 as described above, and has a first side surface 41 and a second side surface 42 that are adjacent to each other.
- the first side surface 41 and the second side surface 42 have a plurality of constraining surfaces described below, and each constraining surface functions as a mounting surface for the holder 10 or is covered depending on the mounting direction to the holder 10.
- a function as a so-called flank that avoids contact with the cutting material 100 is exhibited.
- the side surface 4 is interposed between the first side surface 41 and the second side surface 42, and is a corner side surface 43 that is curved outward as viewed from above. It has further.
- the insert 1 of the present embodiment has a rectangular shape in which the outer edge on the first side face 41 side is a long side and the outer edge on the second side face 42 side is a short side in a top view. Therefore, the third side surface 41P that is paired with the first side surface 41 is located on the opposite side, and the fourth side surface 42P that is paired with the second side surface 42 is located on the opposite side. Since the third side surface 41P and the fourth side surface 42P are the same as the structures of the first side surface 41 and the second side surface 42, respectively, the first side surface 41 and the second side surface 42 will be described below unless special explanation is required. The description of the third side surface 41P and the fourth side surface 42P will be replaced with the description. This also applies to the other corner side surface 43P that is paired with the corner side surface 43.
- the insert 1 according to this embodiment is a so-called horizontal insert 1.
- the insert 1 is attached to the holder 10 using the fastening screw 61 inserted in the through-hole 6 so that it may mention later.
- variety of the insert 1 is large, the rake face 8 and the standing surface 9 can be made into a desired magnitude
- the tightening screw 61 is inserted into the through-hole 6, it is not necessary to increase the thickness of the insert 1 more than necessary, so that the material cost can be reduced.
- the first side surface 41 is inclined from the upper surface 2 toward the lower surface 3 outward with an inclination angle ⁇ 1 with respect to the central axis S1 as a first upper restraint.
- the first lower constraining surface 41b that is continuous with the surface 41a and the first upper constraining surface 41a and is inclined inward at an inclination angle ⁇ 2 is sequentially provided.
- the first side surface 41 is located between the main cutting edge 51 and the first upper restraining surface 41 a, and the central axis S ⁇ b> 1 increases from the upper surface 2 toward the lower surface 3.
- a first upper reinforcing surface 41c having a portion inclined outward at an inclination angle ⁇ 3.
- the inclination angle ⁇ 3 of the first upper reinforcing surface 41c is the inclination angle of the first upper restraining surface 41a. It is larger than ⁇ 1.
- first side surface 41 is located between the main cutting edge 51A on the lower surface 3 side and the first lower restraining surface 41b, and inclines inward from the upper surface 2 toward the lower surface 3 with respect to the central axis S1.
- the first lower reinforcing surface 41d is further inclined at an angle ⁇ 4, and the inclination angle ⁇ 4 of the first lower reinforcing surface 41d is larger than the inclination angle ⁇ 2 of the first lower restraining surface 41b.
- the inclination angle ⁇ 1 means the angle formed by the surface S1a parallel to the central axis S1 and the virtual extension line L1 of the first upper restraint surface 41a
- the inclination angle ⁇ 2 is the surface S1a.
- the angle formed by the virtual extension line L2 of the first lower restraint surface 41b is meant.
- the inclination angle ⁇ 3 means an angle formed by the surface S1a and the virtual extension line L3 of the first upper reinforcing surface 41c
- the inclination angle ⁇ 4 is an angle between the surface S1a and the first lower reinforcing surface 41d. It means an angle formed by the virtual extension line L4.
- Each inclination angle is represented by an absolute value based on the central axis S1.
- the inclination angles ⁇ 1 and ⁇ 2 are preferably set to 3 to 5 °
- the inclination angles ⁇ 3 and ⁇ 4 are preferably set to 4 to 7 °, respectively.
- first side surface 41 is continuous with the main cutting edge 51 and is located closer to the second side surface 42 than both the first upper reinforcing surface 41 c and the first upper restraining surface 41 a, and from the upper surface 2 toward the lower surface 3.
- the first flank 41e is further inclined outwardly with an inclination angle ⁇ with respect to the central axis S1, and the inclination angle ⁇ (not shown) of the first flank 41e is the first upper reinforcing surface 41c. Is smaller than the inclination angle ⁇ 3.
- the inclination angle ⁇ of the first flank 41e is 3 to 15 ° smaller than the inclination angle ⁇ 1 of the first upper restraint surface 41a.
- the first flank 41 e is continuous not only with the main cutting edge 51 but also with the corner cutting edge 53.
- the same effect can be obtained on the corner cutting edge 53 side.
- the first upper restraint surface 41a of the first side surface 41 is brought into contact with the holder 1 by contacting the holder 10 when performing cutting using the main cutting edge 51P located on the third side surface 41P side. This is a part having a role of fixing the holder 10. The reverse is also true.
- the second side surface 42 is continuous from the upper surface 2 toward the lower surface 3 with the second upper constraining surface 42a and the second upper constraining surface 42a that are inclined inwardly at an inclination angle ⁇ 1 with respect to the central axis S1.
- a second lower restraining surface 42b that is inclined outward at an inclination angle ⁇ 2 is sequentially provided.
- the inclination angle ⁇ 1 means the angle formed by the surface S1a parallel to the central axis S1 and the virtual extension line L5 of the second upper restraining surface 42a, and the inclination angle ⁇ 2 is the second lower surface and the surface S1a.
- the angle formed by the virtual extension line L6 of the restraining surface 42b is meant.
- the second lower restraint surface 42b of the second side surface 42 is in contact with the insert 1 by abutting against the holder 10 when performing cutting using the auxiliary cutting edge 52P located on the fourth side surface 42P side. This is a part having a role of fixing the holder 10. The reverse is also true.
- the corner cutting edge 53P is located between the sub cutting edge 52P and the main cutting edge 51P mentioned above.
- the insert 1 of the present embodiment having the above-described configuration is, for example, a hard material such as cemented carbide, ceramic or cermet, or a hard film such as TiC, TiN, TiCN, or Al 2 O 3 on the base material. Or what was coated by means, such as CVD, can be used. From the viewpoint of chipping resistance and stability of the coating layer, it is preferable to use a cemented carbide obtained by PVD coating.
- the cutting blade 5 provided in the insert 1 ⁇ / b> A of the present embodiment has a main cutting edge 51 and a sub cutting edge 52 connected via a corner cutting edge 53, as in the insert 1 according to the first embodiment. ing.
- the sub cutting blade 52 has the highest highest point 52T (vertex) in the center area
- the point is inclined downward from the point 52T toward the one end 521 on the main cutting edge 51 (corner cutting edge 53) side and the other end 522 on the side away from the main cutting edge 51 (corner cutting edge 53).
- the inclination angle from the highest point 52T toward the one end 521 is smaller than the inclination angle from the highest point 52T toward the other end 522.
- region is curvilinear form or circular arc shape.
- a portion from the highest point 52T to the one end 521 is a portion mainly having a role of smoothing the finished surface 102 of the work material 100, and is a gentle convex convex toward the upper surface 2 from the highest point 52T toward the one end 521. It has a circular arc shape.
- the sub cutting edge 52 is comprised by three linear parts 52a, 52b, 52c when it sees from an upper surface. Specifically, the linear first portion 52a in the central region is located on the outermost side of the insert 1, and the linear second portion 52b and the third portion 52c on both sides thereof are separated from the central region, respectively. Inclined inward.
- the second portion 52b on the main cutting edge 51 (corner cutting edge 53) side is along the finishing surface 102 of the work material 100, and the upper surface 2 is directed forward in the rotational direction.
- a large clearance is ensured between the third portion 52 c on the upper surface 2 side away from the main cutting edge 51 (corner cutting edge 53) and the finished surface 102 of the work material 100.
- the clearance between the second portion of the auxiliary cutting edge 52A on the lower surface 3 side and the corner cutting edge, which is configured corresponding to the upper surface 2 described above, and the finished surface 102 of the work material 100 should be ensured. Therefore, it is possible to improve the surface accuracy of the finished surface 102 of the work material 100 by suppressing the contact between these parts and the finished surface 102.
- the sub-cutting blade 52 may replace with having the above structures for the sub-cutting blade 52, and may make it become one straight line which continues the 1st part 52a and the 3rd part 52c when it sees from an upper surface.
- the secondary cutting edge 52 instead of configuring the secondary cutting edge 52 with the straight portion as described above, it may have a curved shape that bulges outward from the insert 1 as viewed from the top toward the center region.
- the side surface 4 has a first side surface 41 and a second side surface 42 that are connected to the upper surface 2 and the lower surface 3 and are adjacent to each other, as in the first embodiment.
- the first side surface 41 has a first upper restraint surface 41a and a first lower restraint surface 41b, as in the first embodiment.
- the inclination angle ⁇ 1 the inclination angle ⁇ 2.
- the inclination angles ⁇ 1 and ⁇ 2 are preferably set to 3 to 5 °, respectively.
- boundary part 41g of the 1st upper restraint surface 41a and the 1st lower restraint surface 41b is: It is linear, and is inclined toward the lower surface 3 side with increasing distance from the auxiliary cutting edge 52 with respect to the perpendicular line of the center axis S1 of the insert 1.
- the boundary portion 41g is located on the outermost side of the first side surface 41. Strictly speaking, the boundary portion 41g has a strip shape with a narrow width in the thickness direction of the insert 1A, and has a curved surface shape that protrudes outward from one end to the other end in the width direction.
- the boundary portion 41g may be curved in a partial or full length in a side view.
- the first side surface 41 has a first upper restraint surface 41 a and a first lower restraint surface 41 b that are substantially the same as the first side surface 41.
- the two divided surfaces (areas) 41a1, 41a2, 41b1, 41b2 abut against the holder 10 independently via the recess 41f.
- the contact area with the holder 10 can be secured relatively large even when a slight positional deviation occurs during the attachment to the holder 10. Stability is improved.
- three surfaces (41a1, 41a2, 42a) including the second upper restraining surface 42a (or the second lower restraining surface 42b) of the second side surface 42 are brought into contact with the holder 10. Therefore, it is possible to exhibit excellent mounting stability.
- the concave portion 41f is preferably inclined in a direction approaching the auxiliary cutting edge 52 from the upper surface 2 toward the lower surface 3, thereby restricting the divided surfaces 41a1, 41a2 (41b1, 41b2). Can be brought close to each other.
- the cutting force mainly applied to the insert 1A when cutting the work material 100 can be received in a balanced manner by the two divided constraining surfaces 41a1, 41a2 (41b1, 41b2), thereby improving the mounting stability.
- the depth 41f1 of the recess 41f is preferably set to 0.03 to 0.15 mm, for example.
- the first upper reinforcing surface 41c of the first side surface 41 further includes an upper region 41c1 continuous with the main cutting edge 51 as shown in FIGS.
- the upper region 41c1 is located on the side farther from the first region and the sub-cutting blade 52 (corner cutting blade 53) located on the side closer to the sub-cutting blade 52 (corner cutting blade 53) in a side view.
- the second region is inclined outward and the second region is inclined inward toward the lower surface 3.
- the region from the vicinity of the AA line to the vicinity of the CC line corresponds to the first region
- the region near the DD line corresponds to the second region.
- the straight line S ⁇ b> 1 b is perpendicular to the central axis S ⁇ b> 1 and passes through the center of the insert 1 in the thickness direction.
- the first side surface 41 The first upper reinforcing surface 41c (upper region 41c1) is inclined outwardly from the upper surface 2 toward the lower surface 3. More specifically, the first upper reinforcing surface 41 c (upper region 41 c 1) of the first side surface 41 has a shape that swells outward from the upper surface 2 toward the lower surface 3. In the present embodiment, the region shown in FIG. 6C has the same shape.
- the main cutting edge of the first upper reinforcing surface 41c in the second region located on the side far from the sub cutting edge 52 (corner cutting edge 53), the main cutting edge of the first upper reinforcing surface 41c.
- the upper region 41c1 continuing to 51 inclines inward with respect to the central axis S1 of the insert 1, and the lower region 41c2 continuing to the lower surface 3 side of the upper region 41c1 further toward the lower surface 3 side. As it tilts outward. More specifically, the lower region 41c2 is shaped to bulge outward as it goes further toward the lower surface 3 side.
- the upper region 41c1 of the first upper reinforcing surface 41c is inclined inward with respect to the central axis S1 of the insert 1, so that the rotational axis S2 of the holder 10 with the insert 1 attached to the holder 10 is maintained. , The clearance between the upper region 41c1 and the wall surface 101 of the work material 100 can be secured, so that the wall surface 101 of the work material 100 is effectively damaged. Can be suppressed. Accordingly, in the present embodiment, in the region on the side separated from the auxiliary cutting edge 52 (corner cutting edge 53), unlike the first embodiment described above, the region that bulges outward in the first upper reinforcing surface 41c. Is getting smaller.
- the relationship between the upper region 41d1 and the lower region 41d2 is the same for the first lower reinforcing surface 41d.
- the inclination angles of the upper region 41d1 and the lower region 41d2 are determined based on the central axis S1 from the upper surface 2 toward the lower surface 3, respectively.
- the first flank 41e of the first side surface 41 differs from the first embodiment with respect to the central axis S1 of the insert 1 from the upper surface 2 toward the lower surface 3 as the distance from the auxiliary cutting edge 52 side increases.
- the slope changes from an inward slope to an outward slope.
- the second side surface 42 has a second upper restraint surface 42a and a second lower restraint surface 42b, as in the first embodiment.
- the inclination angle ⁇ 1 is equal to the inclination angle ⁇ 2.
- the inclination angles ⁇ 1 and ⁇ 2 are preferably set to 4 to 8 °.
- the second side surface 42 is located between the auxiliary cutting edge 52 and the second upper restraining surface 42a, A second upper reinforcing surface 42d that is located between the second upper reinforcing surface 42c substantially parallel to the central axis S1 and the main cutting edge 51A on the lower surface 3 side and the second lower restraining surface 42b, and substantially parallel to the central axis S1. And further.
- the second side surface 42 has a second upper reinforcing surface 42c, a second upper restricting surface 42a, a second lower restricting surface 42b, and a second lower reinforcing surface 42d as it goes from the upper surface 2 to the lower surface 3.
- a second upper restraining surface 42a and the second lower restraining surface 42b it is possible to suppress contact with the work material 100 at the time of cutting, and in addition, a second substantially parallel to the central axis S1.
- the 2 upper reinforcement surface 42c and the 2nd lower reinforcement surface 42d it becomes possible to combine the cutting edge strength which was excellent.
- the length of the second upper restraining surface 42a is preferably larger than the length of the second upper reinforcing surface 42c. If the ratio of the lengths of both changes in the width direction of the second side surface 42, the area of the second upper restraining surface 42a is preferably larger than the area of the second upper reinforcing surface 42c. In particular, in view of the attachment stability with respect to the holder 10, it is preferable that the area of the second upper restraining surface 42a be three times or more than the area of the second upper reinforcing surface 42c. Since other configurations are the same as those of the insert 1 according to the first embodiment described above, the description thereof is omitted.
- FIGS. 8 and 9. 8 and 9 the same components as those in FIGS. 1 to 7 described above are denoted by the same reference numerals and description thereof is omitted.
- the basic configuration of the insert according to the third embodiment is the same as that of the insert 1A according to the second embodiment described above, in the following description, differences from the insert according to the second embodiment will be mainly described. The description of the overlapping contents is omitted.
- the cutting blade 5 provided in the insert 1 ⁇ / b> B of the present embodiment is similar to the inserts 1, 1 ⁇ / b> A according to the first embodiment and the second embodiment. It is connected via a blade 53.
- the secondary cutting edge 52 is, as shown in FIG. 8C, the main cutting edge 51 (corner cutting edge) in a side view from the second side face 42 side. 53) is inclined linearly downward from one end 521 on the side toward the other end 522 on the side separated from the main cutting edge 51 (corner cutting edge 53).
- the inclination angle is preferably set to 6 to 13 ° with respect to a plane perpendicular to the central axis S1 in a side view.
- the part on the one end 521 side is a part having a main role for smoothing the finished surface 102 of the work material 100.
- the auxiliary cutting edge 52 projects from the one end 521 toward the other end 522 like a maximum point 52T. There is no site.
- the chips generated when cutting is performed using the cutting edges 51 to 53 on one corner side surface 43 side, the chips are discharged through the upper surface 2 (rake surface 8). Since the collision with the secondary cutting edge 52P on the 43P side is suppressed, damage to the unused secondary cutting edge 52P can be reduced.
- the secondary cutting edge 52 may have a gentle arc shape in a side view from the second side face 42 side.
- the side surface 4 is connected to each of the upper surface 2 and the lower surface 3, as shown in FIGS. 8 and 9, and is adjacent to each other.
- the first side surface 41 and the second side surface 42 are provided.
- the first side surface 41 has a first upper reinforcing surface 41c, a first upper restraint surface 41a, and a first lower restraint surface as it goes from the upper surface 2 to the lower surface 3, as shown in FIG. 41b and a first lower reinforcing surface 41d.
- the 1st side surface 41 has the 1st flank 41e, as shown in FIG.8 (d).
- the first side surface 41 includes a boundary portion 41g between the first upper restraint surface 41a and the first lower restraint surface 41b, and the first upper restraint surface. 41a and the recessed part 41f located in the approximate center part of the 1st lower constraining surface 41b.
- the boundary portion 41g is a strip having a relatively wide width in the thickness direction of the insert 1B, unlike the thin linear second embodiment, and from one end to the other end in the width direction. As it goes, it forms a gently curved surface that is convex outward. According to this, when molding the insert 1B, it becomes possible to smoothly fill the mold with the material.
- the radius of curvature of the curve is preferably set to 0.1 to 0.5 mm, for example.
- the second side surface 42 has a second upper reinforcing surface 42c and a second upper restraint surface as it goes from the upper surface 2 to the lower surface 3, as shown in FIG. 8C and FIG. 42a, a second lower restraining surface 42b, and a second lower reinforcing surface 42d.
- the inclination angle ⁇ 1 is equal to the inclination angle ⁇ 2.
- the inclination angles ⁇ 1 and ⁇ 2 are preferably set to 4 to 8 °.
- the second side surface 42 is located between the auxiliary cutting edge 52 and the second upper restraining surface 42a as shown in FIGS.
- a second upper reinforcing surface 42d positioned between the main cutting edge 51A on the lower surface 3 side and the second lower restraining surface 42b and substantially parallel to the central axis S1; Have. Therefore, the insert 1B can achieve the same effects as those of the second embodiment.
- the second upper reinforcing surface 42c and the second lower reinforcing surface 42d are formed as shown in FIGS. 9 (b) to 9 (d) as the auxiliary cutting edge 52 is inclined linearly as described above. ),
- the length in the thickness direction of the insert 1B decreases as the distance from the corresponding main cutting edge 51 (corner cutting edge 53) side increases. Since other configurations are the same as those of the inserts 1 and 1A according to the first embodiment and the second embodiment described above, description thereof will be omitted.
- a cutting tool according to an embodiment of the present invention will be described with reference to FIGS.
- a cutting tool to which the insert 1 according to the first embodiment is attached will be described as an example among the inserts according to the first to third embodiments described above.
- the cutting tool 20 of this embodiment has a plurality of the above-described inserts 1 attached to the outer peripheral tip of the holder 10.
- a plurality of insert pockets 11 are formed at the outer peripheral tip of the holder 10 at intervals in the circumferential direction.
- the insert pocket 11 is a portion in which the outer peripheral front end portion of the holder 10 is cut out in a substantially V shape when viewed from the front end.
- the mounting surface functions as a mounting site for the insert 1. Then, one insert 1 is attached to each insert pocket 11.
- a method for attaching the insert for example, a method of inserting a tightening screw 61 into the through hole 6 of the insert 1 and screwing the tip end portion of the tightening screw 61 into the screw hole 12 formed on the mounting surface of the holder 10 can be cited. (Refer to FIG. 10 (b), FIG. 11 and FIG. 12 (a)).
- a clamp structure etc. are mentioned, for example.
- the holder 10 (insert pocket) includes a seating surface 11 c that contacts the lower surface 3 of the insert 1, and a first upper restraining surface 41 a (third upper surface) of the insert 1.
- An angle ⁇ 1 formed by the virtual extension line L7 of the seating surface 11c and the virtual extension line L8 of the first restriction surface 11a is an acute angle. It is.
- the holder 10 (insert pocket) is provided with a second restraining surface 11b (abutting against the second lower restraining surface 42b (fourth lower restraining surface 42Pb) of the insert 1).
- the angle ⁇ 2 formed by the virtual extension line L7 of the seating surface 11c and the virtual extension line L9 of the second restraining surface 11b is an acute angle.
- the insert 1 is attached to the holder 10 such that the main cutting edge 51 protrudes from the outer periphery of the holder 10 with the upper surface 2 facing forward in the rotational direction indicated by the arrow I in FIG.
- the first side surface 41 and the second side surface 42 are positioned on the outer peripheral side of the tip of the holder 10, and the workpiece 100 is cut by the main cutting edge 51 and the auxiliary cutting edge 52.
- the surfaces of the side surface 4 of the insert 1 that do not contribute to the cutting action that is, the third side surface 41P and the fourth side surface 42P are in contact with the contact surface of the holder 10, respectively. That is, as shown by the area surrounded by the broken line c shown in FIG. 12A, the fourth lower restraining surface 42Pb of the fourth side surface 42P abuts on the second restraining surface 11b of the holder 10, and FIG. ), When the third upper restraining surface 41Pa of the third side surface 41P abuts on the first restraining surface 11a of the holder 10, the insert 1 and the holder 10 are brought into contact with each other. The insert 1 is attached to the holder 10 by being restrained.
- a relatively large cutting force received by the main cutting edge 51 on the first side face 41 side is applied to the through hole 6 during the cutting process.
- This acts as a force (buoyancy) that lifts the third side surface 41P side of the insert 1 from the holder 10 in the direction of the arrow e through the inserted tightening screw 61.
- This buoyancy is caused by the acute angle ⁇ 1.
- the third upper restraint surface 41Pa of the third side surface 41P where the occurrence of the problem can be pressed from above by the first restraint surface 11a of the holder 10, and the insert 1 can be restrained effectively.
- the angle ⁇ 2 is an acute angle
- the fourth lower restraining surface 42Pb of the fourth side surface 42P where the buoyancy is generated becomes the holder 10.
- the second restraining surface 11b can be pressed from above, and the insert 1 can be restrained effectively.
- an appropriate restraining force can be exhibited according to the position to which the cutting force is applied and the magnitude of the cutting force. Can be improved.
- the cutting tool 20 of the present embodiment it is possible to improve the degree of freedom of mounting the above-described insert 1 on the holder 10 and to obtain excellent operational effects based thereon. That is, as shown in FIG. 12A, the main cutting edge 51 is arranged to have a positive axial rake angle ⁇ 1. Thereby, reduction of cutting resistance can be aimed at. Further, the second upper restraining surface 42a of the second side surface 42 is disposed so as to have a clearance angle ⁇ 2 of about 8 to 15 °. This makes it possible to suppress damage to the second upper restraining surface 42a and improve the surface roughness of the finished surface 102 of the work material 100.
- the axial rake angle ⁇ 1 of the main cutting edge 51 is preferably about 8 to 15 ° at the end on the side of the sub cutting edge 52, and is preferably made smaller as the distance from the sub cutting edge 52 increases.
- the axial rake angle ⁇ 1 means an inclination angle with respect to the surface S2a parallel to the central axis S2 of the holder 10
- the clearance angle ⁇ 2 means an inclination angle with respect to the surface S2b perpendicular to the central axis S2 of the holder 10.
- the insert 1 is arranged so that the longitudinal direction thereof has an inclination of about 2 to 6 ° with respect to the rotation axis S2 of the holder 10 in a side view, and accordingly, the auxiliary cutting edge 52 is arranged to have an inclination of about 0 to 1 ° with respect to the surface S2b perpendicular to the rotation axis S2 of the holder 10.
- a non-cutting region that is not substantially used as the secondary cutting edge 52 in the intersecting portion of the upper surface 2 and the second side surface 42, that is, a region from the central portion to the end opposite to the corner cutting blade 53 is a holder.
- the non-cutting region is separated from the finished surface 102 of the work material 100 during cutting, it is possible to suppress contact with each other and reduce damage to the non-cutting region. . That is, when the insert 1 is used with the upper surface 2 and the lower surface 3 reversed, the non-cutting region on the upper surface 2 side can appropriately exhibit the function as the auxiliary cutting edge 52. The same applies when the upper and lower surfaces are reversed.
- Cutting the workpiece 100 with the main cutting edge 51 and the auxiliary cutting edge 52 is performed by rotating the cutting tool 20 having the above-described configuration in the direction of arrow I about the rotation axis S ⁇ b> 2 of the holder 10.
- a cutting tool 20 having a plurality of inserts 1 attached to the holder 10 as described above is prepared. As shown in FIG. 13, the cutting tool 20 is arranged so that the rotation axis S ⁇ b> 2 of the holder 10 is substantially parallel to the surface of the workpiece 100 that is cut to become the wall surface 101.
- the work material 100 is fixed to a milling machine bed or the like (not shown), and the cutting tool 20 is moved in the direction of arrow II to set an appropriate cutting amount.
- the cutting tool 20 is sent (moved) in the direction of arrow III while rotating in the direction of arrow I about the rotation axis S2 of the holder 10.
- the main cutting edge 51 comes into contact with the arc-shaped portion of the work material 100 positioned forward in the feed direction, and cuts the region corresponding to the cutting depth.
- arc-shaped streaks remain on the surface (bottom surface) of the work material 100. This arc-shaped streak is cut by the auxiliary cutting edge 52 to form a smooth surface.
- the cutting tool 20 is lifted in the direction of arrow IV to separate the cutting tool 20 from the work material 100.
- the cut workpiece 110 having the wall surface 101 and the finished surface 102 is manufactured. That is, in the manufacturing method of the cut workpiece according to the present embodiment, the cutting tool 20 is rotated, each insert 1 performs cutting by contacting the work material 100, and then the cutting tool 20 is separated from the work material 100.
- the cut workpiece 110 is manufactured by sequentially performing these processes.
- the insert 1 When the cutting blade 5 used is worn, the insert 1 is rotated about the central axis S1, or the upper surface 2 and the lower surface 3 are turned over, and the unused cutting blades 5 and 5P are used. What is necessary is just to cut.
- the inserts 1, 1A, 1B according to the first to third embodiments described above are modified so that each part of each insert is applied to each other as much as possible in order to exhibit the function of the part. Also good.
- the cutting tool 20 is rotated and sent to the work material 100. Instead, the cutting tool 20 is rotated at a predetermined position, and the work material 100 is rotated. Cutting may be performed by feeding and running to the cutting tool 20. Or in the above-mentioned embodiment, although the milling machine was mentioned as an example as a machine tool, it replaces with this and makes non-rotating cutting tool 20 and rotating work material 100 contact like a lathe. According to this, cutting may be performed.
- the inserts 1A and 1B according to the second and third embodiments when the first restraining surface 11a of the holder 10 is planar, the first upper restraining surface 41a is divided into two by the recess 41f. The two divided surfaces (areas) 41a1 and 41a2 come into contact with the first constraining surface 11a. Therefore, according to the inserts 1 ⁇ / b> A and 1 ⁇ / b> B according to the second and third embodiments, a relatively large contact area with the holder 10 can be ensured even when a slight positional deviation occurs during attachment to the holder 10. Therefore, the mounting stability with respect to the holder 10 is improved.
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Abstract
Description
(第1実施形態)
以下、本発明の切削インサート(以下、「インサート」と言うことがある。)に係る第1実施形態について、図1~図3を参照して詳細に説明する。
図1に示すように、本実施形態のインサート1は、大略、上面2、下面3、上面2および下面3のそれぞれと接続している側面4、上面2および下面3の間を貫通している貫通孔6、並びに上面2と側面4との交線部に位置している切刃5を備えている。上面2はすくい面8および立ち上がり面9、並びに平坦面21を有し、側面4は互いに隣接している第1側面41および第2側面42を有し、切刃5は主切刃51および副切刃52を有する。以下、インサート1の各構成要素について、順に説明する。
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4~図7を参照して詳細に説明する。なお、図4~図7においては、上述した図1~図3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。
次に、本発明の第3実施形態に係るインサートについて、図8および図9を参照して詳細に説明する。なお、図8および図9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。また、第3実施形態に係るインサートの基本的な構成は上述の第2実施形態に係るインサート1Aと同一であるため、以下の説明においては、主として第2実施形態に係るインサートとの差異を説明し、重複する内容については説明を省略する。
次に、本発明の実施形態に係る切削工具を、図10~図12を用いて説明する。本実施形態においては、上述した第1~第3実施形態に係るインサートのうち、第1実施形態に係るインサート1を取り付けた切削工具を例にとって説明する。
図11および図12に示すように、本実施形態の切削工具20は、上述のインサート1を複数、ホルダ10の外周先端部に取り付けたものである。
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、上述した切削工具20を例にとって説明する。
Claims (23)
- 上面と、
下面と、
前記上面および前記下面のそれぞれと接続しており、互いに隣接している第1側面および第2側面を有する側面と、
前記上面と前記第1側面との交線部に位置している主切刃、および前記上面と前記第2側面との交線部に位置している副切刃を有する切刃と、を備え、
前記上面は、前記主切刃に沿って位置し、前記主切刃から離れるにつれて下方に傾斜しているすくい面を有し、
前記第2側面は、前記上面から前記下面に向かって、前記上面および前記下面の間を貫通する中心軸を基準にして内方に傾斜角度α1で傾斜している第2上拘束面および前記第2上拘束面と連続し外方に傾斜角度α2で傾斜している第2下拘束面を順に有する、切削インサート。 - 上面視において、前記第1側面側の外縁を長辺とし前記第2側面側の外縁を短辺とする長方形状である、請求項1に記載の切削インサート。
- 前記第1側面は、前記上面から前記下面に向かって、前記中心軸を基準にして外方に傾斜角度β1で傾斜している第1上拘束面および前記第1上拘束面と連続し内方に傾斜角度β2で傾斜している第1下拘束面を順に有する、請求項1または2に記載の切削インサート。
- 前記第1側面は、前記主切刃と前記第1上拘束面との間に位置し、前記上面から前記下面に向かうにつれて前記中心軸を基準にして外方に傾斜角度β3で傾斜している部位を有する、第1上強化面をさらに有し、
前記第1上強化面の前記傾斜角度β3は、前記第1上拘束面の前記傾斜角度β1よりも大きい、請求項3に記載の切削インサート。 - 前記第1上強化面は、前記主切刃に連続している上部領域をさらに有し、
前記上部領域は、側面視において、前記副切刃に近い側に位置している第1領域および前記副切刃から遠い側に位置している第2領域を有するとともに、前記下面に向かうにつれて前記第1領域は外方に傾斜しており、且つ、前記第2領域は内方に傾斜している、請求項4に記載の切削インサート。 - 前記第1上強化面は、前記上部領域の前記下面側に連続している下部領域をさらに有し、
前記第2領域において、前記下部領域は前記下面に向かうにつれて外方に傾斜している、請求項5に記載の切削インサート。 - 前記第1側面は、前記第1上拘束面と前記第1下拘束面とが交差する位置に境界部をさらに有する、請求項3~6のいずれかに記載の切削インサート。
- 前記境界部は直線状である、請求項7に記載の切削インサート。
- 側面視において、前記境界部は、厚み方向に所定の幅を有する帯状であり、且つ、幅方向の一端から他端に向かうにつれて外方に凸の曲面状である、請求項8に記載の切削インサート。
- 前記第1側面は、前記第1上拘束面および前記第1下拘束面の少なくとも一方に前記上面側から前記下面側にわたって位置している凹部をさらに有し、
前記第1上拘束面および前記第1下拘束面のうち少なくとも一方は、前記凹部によって2つの領域に分割されている、請求項3~9のいずれかに記載の切削インサート。 - 前記第1側面は、前記主切刃と連続し、前記第1上強化面および前記第1上拘束面のいずれよりも前記第2側面側に位置し、且つ、前記上面から前記下面に向かって前記中心軸を基準にして外方に傾斜角度γで傾斜している第1逃げ面をさらに有し、
前記第1逃げ面の前記傾斜角度γは、前記第1上強化面の前記傾斜角度β3よりも小さい、請求項4~10のいずれかに記載の切削インサート。 - 前記第2側面は、前記副切刃と前記第2上拘束面との間に位置し、且つ、前記中心軸に平行である第2上強化面をさらに有する、請求項1~11のいずれかに記載の切削インサート。
- 側面視において、前記副切刃は、前記主切刃側から離れるにつれて下方に直線状に傾斜している、請求項1~12のいずれかに記載の切削インサート。
- 側面視において、前記副切刃は、その中央領域において頂点を有し、前記頂点から前記主切刃側に向かうにつれて下方に傾斜している、請求項1~12のいずれかに記載の切削インサート。
- 側面視において、前記副切刃の前記下面側への傾斜は、前記上面側に凸の円弧状である、請求項14に記載の切削インサート。
- 前記上面は、前記すくい面の少なくとも一部と連続して位置し、前記主切刃から離れるにつれて上方に傾斜している立ち上がり面をさらに有する、請求項1~15のいずれかに記載の切削インサート。
- 前記上面は、前記中心軸の周囲であって前記主切刃と離隔した部位に前記中心軸に垂直な平坦面をさらに有し、
前記すくい面のうち前記副切刃から遠い側に位置している第1端部は、前記立ち上がり面を介して前記平坦面と連続している、請求項16に記載の切削インサート。 - 前記上面は、前記中心軸の周囲であって前記主切刃と離隔した部位に前記中心軸に垂直な平坦面をさらに有し、
前記すくい面のうち前記副切刃に近い側に位置している第2端部は、前記平坦面と連続している、請求項1~17のいずれかに記載の切削インサート。 - 前記上面および前記下面の間を貫通している貫通孔をさらに備える、請求項1~18のいずれかに記載の切削インサート。
- 請求項1~19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取り付けられるホルダと、を備え、
前記ホルダは、前記切削インサートの前記下面と当接する着座面、および前記切削インサートの前記第1上拘束面と当接する第1拘束面を有し、
前記着座面の仮想延長線と前記第1拘束面の仮想延長線とがなす角の角度は鋭角である、切削工具。 - 前記ホルダは、前記切削インサートの前記第2下拘束面と当接する第2拘束面をさらに有し、
前記着座面の仮想延長線と前記第2拘束面の仮想延長線とがなす角の角度は鋭角である、請求項20に記載の切削工具。 - 前記ホルダの前記第1拘束面は平面状であり、
前記第1上拘束面のうち前記凹部によって2つに分割されている領域と前記第1拘束面とが当接している、請求項20または21に記載の切削工具。 - 請求項20~22のいずれかに記載の切削工具を回転させる工程と、
回転している前記切削工具の前記切刃を被削材に接触させる工程と、
前記切削工具を前記被削材から離隔する工程と、
を備える、切削加工物の製造方法。
Priority Applications (5)
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JP2012528694A JP5525615B2 (ja) | 2010-08-11 | 2011-08-10 | 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 |
US13/810,735 US8998542B2 (en) | 2010-08-11 | 2011-08-10 | Cutting insert, cutting tool, and method of manufacturing machined product using them |
KR1020127032715A KR101498547B1 (ko) | 2010-08-11 | 2011-08-10 | 절삭 인서트, 절삭 공구, 및 이들을 이용한 절삭 가공물의 제조 방법 |
CN201180036034.0A CN103025462B (zh) | 2010-08-11 | 2011-08-10 | 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 |
EP11816448.2A EP2604369B1 (en) | 2010-08-11 | 2011-08-10 | Cutting insert, cutting tool, and method for producing cut article using cutting insert and cutting tool |
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US20130115022A1 (en) | 2013-05-09 |
KR101498547B1 (ko) | 2015-03-04 |
CN103025462A (zh) | 2013-04-03 |
JPWO2012020784A1 (ja) | 2013-10-28 |
CN103025462B (zh) | 2015-03-18 |
US8998542B2 (en) | 2015-04-07 |
EP2604369A4 (en) | 2018-04-04 |
EP2604369B1 (en) | 2019-11-06 |
KR20130038295A (ko) | 2013-04-17 |
JP5525615B2 (ja) | 2014-06-18 |
EP2604369A1 (en) | 2013-06-19 |
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