WO2013180160A1 - Plaquette de coupe, outil de coupe et procédé de production d'objet coupé - Google Patents

Plaquette de coupe, outil de coupe et procédé de production d'objet coupé Download PDF

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Publication number
WO2013180160A1
WO2013180160A1 PCT/JP2013/064870 JP2013064870W WO2013180160A1 WO 2013180160 A1 WO2013180160 A1 WO 2013180160A1 JP 2013064870 W JP2013064870 W JP 2013064870W WO 2013180160 A1 WO2013180160 A1 WO 2013180160A1
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WO
WIPO (PCT)
Prior art keywords
cutting
recesses
cutting insert
cutting edge
center
Prior art date
Application number
PCT/JP2013/064870
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English (en)
Japanese (ja)
Inventor
雅大 山本
Original Assignee
京セラ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京セラ株式会社 filed Critical 京セラ株式会社
Priority to JP2014518695A priority Critical patent/JP5815858B2/ja
Publication of WO2013180160A1 publication Critical patent/WO2013180160A1/fr

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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
    • B23C5/202—Plate-like cutting inserts with special form
    • 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
    • B23C5/06—Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/08—Rake or top surfaces
    • B23C2200/085—Rake or top 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/20—Top or side views of the cutting edge
    • B23C2200/203—Curved cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/28—Angles
    • B23C2200/286—Positive cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/32—Chip breaking or chip evacuation
    • B23C2200/326—Chip breaking or chip evacuation by chip-breaking grooves

Definitions

  • the present invention relates to a cutting insert, a cutting tool, and a method for manufacturing a workpiece.
  • a cutting insert described in Patent Document 1 is known as a cutting tool used for cutting a workpiece. Specifically, this cutting insert is used for a turning process such as face milling or end milling.
  • a cutting edge is formed at the intersection of the upper surface and the side surface. The cutting edge has a concavo-convex shape that is partially inclined when viewed from the side in order to improve the machinability of the work.
  • the present invention has been made in view of the above problems, and provides a cutting insert, a cutting tool, and a method of manufacturing a cut product that can be used satisfactorily even when the above-described crack occurs. There is to do. JP 2012-500732 A
  • the cutting insert based on 1 aspect of this invention is equipped with the lower surface, the upper surface, the side surface connected to each of the said lower surface and the said upper surface, and the upper cutting blade located in the intersection part of the said upper surface and the said side surface ing.
  • the upper cutting edge has a plurality of first recesses that are recessed toward the lower surface, and the upper surface is more than the upper cutting blade when the side surface is seen through the plane.
  • a plurality of second recesses recessed toward the center of the first recess, and at least a part of each of the plurality of second recesses is located below each of the first bottom portions of the plurality of first recesses. It is characterized by that.
  • FIG. 5 is a cross-sectional view of a D1-D1 cross section in the cutting insert shown in FIG. 4.
  • FIG. 5 is a cross-sectional view of the D2-D2 cross section in the cutting insert shown in FIG.
  • FIG. 5 is a cross-sectional view of a D3-D3 cross section in the cutting insert shown in FIG. 4. It is the expanded sectional view which expanded area
  • FIG. 1 It is the expanded sectional view which expanded area
  • the cutting insert 1 of one Embodiment is demonstrated in detail using drawing.
  • the drawings referred to below for convenience of explanation, among the constituent members of the embodiment, only the main members necessary for explaining the present invention are shown in a simplified manner. Therefore, the cutting insert 1 of the present invention may include any constituent member that is not shown in the drawings to which the present specification refers.
  • the dimension of the member in each figure does not represent the dimension of an actual structural member, the dimension ratio of each member, etc. faithfully.
  • the cutting insert 1 of the present embodiment has an upper surface 3, a lower surface 5, and a side surface 7.
  • the side surface 7 is connected to the upper surface 3 and the lower surface 5 respectively.
  • An upper cutting edge 9 is formed at the intersection of the upper surface 3 and the side surface 7.
  • a lower cutting edge 11 is formed at the intersection of the lower surface 5 and the side surface 7.
  • Each of the upper surface 3 and the lower surface 5 has a substantially circular shape when viewed in plan, and has substantially the same shape.
  • the upper surface 3 and the lower surface 5 each have four arc-shaped curved portions on the outer periphery. The four curved portions are connected by portions that are linear when viewed in plan.
  • the maximum width of the upper surface 3 and the lower surface 5 in the cutting insert 1 of the present embodiment is 5 to 20 mm.
  • the height from the lower surface 5 to the upper surface 3 is 2 to 8 mm.
  • the height from the lower surface 5 to the upper surface 3 is a width in a direction parallel to a virtual straight line X connecting the center of the upper surface 3 and the center of the lower surface 5 between the upper end of the upper surface 3 and the lower end of the lower surface 5.
  • the virtual straight line X is also the central axis of the cutting insert 1 because it connects the center of the upper surface 3 and the center of the lower surface 5.
  • the shapes of the upper surface 3 and the lower surface 5 are not limited to the above-described form.
  • the shape of the upper surface 3 in a plan view may be a polygonal shape such as a triangular shape, a quadrangular shape, a pentagonal shape, a hexagonal shape, or an octagonal shape.
  • the upper surface 3 has a curved site
  • the curved portion of the upper surface 3 may be a convex curve that is convex outward, such as a parabola or an elliptic curve.
  • the upper surface 3 and the lower surface 5 overlap vertically.
  • the side surface 7 has a curved portion and a flat portion.
  • the curved portion is connected to the curved portion at the outer peripheral edge of the upper surface 3 and the curved portion at the outer peripheral edge of the lower surface 5.
  • the planar portion is connected to the straight portion on the outer periphery of the upper surface 3 and the straight portion on the outer periphery of the lower surface 5.
  • the curved portion has a portion 7a continuous with the upper surface 3, a portion 7b continuous with the lower surface 5, and a portion 7c located between the portions 7a and 7b.
  • the portion 7a is an inclined surface that is inclined so as to protrude outward from the upper surface 3 side toward the lower surface 5 side.
  • the portion 7b is an inclined surface that is inclined so as to protrude outward from the lower surface 5 side toward the upper surface 3 side.
  • the portion 7c is parallel to the virtual straight line X.
  • “outside” means a direction away from the central axis of the cutting insert 1 when the cutting insert 1 is viewed in plan.
  • a through hole 13 is formed from the center of the upper surface 3 to the center of the lower surface 5. Therefore, the penetration direction of the through hole 13 is parallel to the imaginary straight line X.
  • the through hole 13 is provided for inserting a screw 105 when the cutting insert 1 is fixed to the holder 103 of the cutting tool 101 with a screw.
  • a method using a clamp structure may be employed instead of the above-described method using screw fixing.
  • Examples of the material of the cutting insert 1 include cemented carbide or 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).
  • WC—TiC—TaC—Co in which tantalum carbide (TaC) is added to TiC—Co or 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) or titanium nitride (TiN).
  • the surface of the cutting 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 upper surface 3 has a land surface 15, a rake surface 17, a breaker surface 19, and a main surface 21.
  • the land surface 15 is located on the outer periphery of the upper surface 3 and connected to the upper cutting edge 9.
  • the rake face 17 is located closer to the center than the land face 15 and is surrounded by the land face 15.
  • the rake face 17 is an inclined face whose height decreases as it goes toward the center.
  • the breaker surface 19 is located more centrally than the rake face 17 and is surrounded by the rake face 17. Further, the breaker surface 19 has a concave configuration constituted by a portion of an inclined surface whose height decreases toward the center and a portion which is located closer to the center than the inclined surface and increases in height. ing.
  • the main surface 21 is located closer to the center than the breaker surface 19 and is surrounded by the breaker surface 19. The main surface 21 is a flat surface perpendicular to the virtual straight line X.
  • the land surface 15 is formed so as to be substantially parallel to the lower surface 5 or an inclined surface whose height decreases toward the center. Note that “substantially parallel” does not mean strictly parallel, but may mean a slight inclination of about ⁇ 5 °. If it is difficult to evaluate whether the lower surface 5 is not flat but parallel to the lower surface 5, it may be compared with the virtual straight line X instead of the lower surface 5. That is, the land surface 15 may be evaluated based on whether or not it is perpendicular to the virtual straight line X.
  • An upper cutting edge 9 is formed at the intersection of the land surface 15 and the side surface 7.
  • the land surface 15 is provided to increase the strength of the upper cutting edge 9.
  • the upper cutting edge 9 is formed at the intersection of the rake surface 17 and the side surface 7.
  • the rake surface 17 located inside the land surface 15 is an inclined surface whose height decreases toward the center. Therefore, the internal angle formed by the rake face 17 and the side face 7 is small.
  • the internal angle formed by the land surface 15 and the side surface 7 is larger than the internal angle formed by the rake surface 17 and the side surface 7. Therefore, the strength of the upper cutting edge 9 can be increased by having the land surface 15.
  • the width of the land surface 15 is indicated by the distance between the outer periphery of the upper surface 3 and the outer periphery of the rake surface 17.
  • the width of the land surface 15 is appropriately set depending on the cutting conditions, but is set in the range of 0.05 to 0.2 mm, for example.
  • the rake face 17 is located inside the land face 15.
  • the rake face 17 plays a role of scooping off the chips cut by the upper cutting edge 9. Therefore, the chips of the work material 201 flow so as to travel along the surface of the rake face 17.
  • the scooping surface 17 is an inclined surface whose height decreases toward the center in order to scoop off chips well.
  • the inclination angle indicated by the angle formed between the lower surface 5 and the rake face 17 in the cross section perpendicular to the rake face 17 may be set in the range of 10 ° to 50 °, for example.
  • the rake face 17 only needs to decrease in height toward the center. Therefore, as shown in FIGS. 8 and 9, when viewed in cross-section, it may be configured by a plurality of regions having different inclination angles, or may have a concave curve shape.
  • the breaker surface 19 is located inside the land surface 15.
  • the breaker surface 19 serves to curl the chips flowing on the rake surface 17 in a spiral shape.
  • the cutting insert 1 can exhibit excellent chip discharging performance.
  • the region of the breaker surface 19 close to the main surface becomes higher as the distance from the outer periphery increases.
  • the above-described region of the breaker surface 19 is an inclined surface whose height on the center side is higher than that on the outer peripheral side of the upper surface 3.
  • the inclination angle indicated by the angle formed between the lower surface 5 and the breaker surface 19 in the cross section perpendicular to the breaker surface 19 may be set in the range of, for example, 5 ° to 45 °.
  • An upper cutting edge 9 is formed at the intersection of the upper surface 3 and the side surface 7.
  • the upper cutting edge 9 has an arcuate portion that is convex outward and a portion that is linear when viewed in plan.
  • the arc-shaped portion corresponds to the arc-shaped curved portion on the outer periphery of the upper surface 3.
  • Each arcuate portion of the upper cutting edge 9 is longer than the straight portion.
  • the intersection line between the upper surface 3 and the side surface 7 is not a strict line shape due to the intersection of the two surfaces. If the intersection line between the upper surface 3 and the side surface 7 is sharpened at an acute angle, the durability of the upper cutting edge 9 is lowered. For this reason, a portion where the upper surface 3 and the side surface 7 intersect with each other may be slightly curved so-called honing.
  • one of the arcuate portions is used as a main cutting edge for cutting the work material 201.
  • one of the linear portions adjacent to the arc-shaped portion is used as a sub-cutting blade, specifically, a “saw blade” for cutting.
  • the linear portion used as the auxiliary cutting edge is arranged on the holder 103 so as to be parallel to the upper surface 3 of the work material 201.
  • the upper cutting edge 9 has a plurality of first recesses 23 that are recessed toward the lower surface 5. Since each of the plurality of first recesses 23 is recessed toward the lower surface 5, the first recess 23 has a concave shape that opens upward when viewed from the side.
  • the upper surface 3 in the first recess 23 is compared with the case where the upper cutting edge 9 has a linear shape parallel to the upper surface 3. It becomes easy to incline and contact the part inclined with respect to the work material 201. Thereby, since the force required for cutting can be reduced, the work material 201 can be processed satisfactorily.
  • the upper cutting edge 9 has four first recesses 23.
  • the four first recesses 23 are formed in each of the four arcuate curved portions of the upper cutting edge 9.
  • the plurality of first recesses 23 are arranged at equal intervals so that the interval between the adjacent first recesses 23 is constant. Note that the number of the first recesses 23 is not limited to four, and there is no problem even if the number of the first recesses 23 is two, three, five, or six.
  • the side surface 7 has a plurality of second recesses 25.
  • the plurality of second recesses 25 are recessed toward the center of the upper surface 3 from the upper cutting edge 9 at least at a portion located below the first bottom portion 25a when seen in a plan view.
  • the plurality of second recesses 25 are respectively formed in the portion 7 c of the side surface 7.
  • the part 7c is located outside the upper cutting edge 9 when viewed in plan. Therefore, the openings of the plurality of second recesses 25 are positioned outside the upper cutting edge 9, respectively.
  • the bottoms of the plurality of second recesses 25 are positioned inside the upper cutting edge 9, respectively.
  • each of the plurality of second recesses 25 is located below each of the bottom portions (first bottom portions 23a) of the plurality of first recesses 23.
  • the plurality of second recesses 25 are not simply formed on the side surface 7 but are positioned below the first bottom 23a.
  • the surface of the second recess 25 is formed. Cracks are exposed. Therefore, the influence of this crack can be limited to a partial defect from the upper surface 3 to the second recess 25. In other words, the force for advancing the crack can be released from the second recess 25 to the outside, and the possibility that the crack reaches the lower surface 5 can be reduced.
  • the width in the direction perpendicular to the virtual straight line X at the portion 7c of the side surface 7 is the virtual width at the portions 7a and 7b. It is larger than the width in the direction orthogonal to the straight line X.
  • the plurality of second recesses 25 are respectively formed in the portion 7c, but the durability of the cutting insert 1 can be improved because the width of the portion 7c is relatively large. Since the second concave portion 25 is formed in the portion 7c, the durability of the portion 7c is likely to be lowered as compared with the case where the second concave portion 25 is not formed.
  • the width of the portion 7c whose durability is likely to be lowered, larger than the width of the portion 7a and the portion 7b, it is possible to keep the influence of the decrease in the durability of the portion 7c small. As a result, the durability of the cutting insert 1 as a whole can be increased.
  • the plurality of second recesses 25 may be configured only in the vicinity immediately below the first bottom 23 a, but are not limited to such a configuration. Absent. Since at least a part of each of the plurality of second recesses 25 only needs to be positioned below each of the plurality of first bottom portions 23a, for example, the configuration shown in FIGS. . In FIG. 3, the center of the second recess 25 is not located below the first recess 23. However, a part of the side of the second recess 25 is located below the first bottom 23a.
  • the annular recesses such that the plurality of second recesses 25 are connected to each other are not simply formed on the side surface 7, but in the cutting insert 1 of the present embodiment, the plurality of first bottom portions 23 a.
  • a plurality of second recesses 25 are formed so as to be positioned below each of the two.
  • the portion between the plurality of second recesses 25 has a relatively high durability as compared with the portion where the second recesses 25 are formed, and therefore the force transmitted from the upper surface 3 to the lower surface 5 of the cutting insert 1.
  • the durability of the cutting insert 1 as a whole can be improved.
  • the second concave portion 25 also functions as a restraint surface to the holder 103 when the cutting insert 1 is attached to the holder 103 and used.
  • the side surface 7 has a plurality of concave constraining surfaces, and at least a part of these constraining surfaces is located below the first bottom portion 23a.
  • the cutting insert 1 When the cutting insert 1 is used for cutting, a force is applied to the cutting insert 1 from the upper surface 3 side toward the lower surface 5 side, that is, in a direction along the virtual straight line X. Therefore, the crack generated from the first bottom portion 23a generally proceeds in the direction along the virtual straight line X. In order to prevent this crack from reaching the lower surface 5, it is required that at least a part of the second recess 25 is located below the first bottom 23a. However, the direction in which the crack progresses does not necessarily strictly follow the direction along the virtual straight line X, and often deviates slightly from the direction along the virtual straight line X.
  • the width L2 of the second recess 25 in the direction perpendicular to the virtual straight line X is the virtual straight line X of the second recess 25. It is larger than the width L1 in the along direction (vertical direction in FIG. 5), and the second recess 25 has a flat shape. Therefore, even if the crack is deviated from the direction along the virtual straight line X, the progress of the crack can be stably stopped at the second recess 25.
  • the width L1 is smaller than the width L2, the distance between the upper cutting edge 9 and the second recess 25 can be easily secured. By securing a large interval, the possibility of the crack itself occurring can be reduced. Therefore, the durability of the cutting insert 1 is further improved.
  • a pair of second concave portions 25 respectively located at the right end portion and the left end portion of the cutting insert 1 in FIG. 7 has a groove shape that is open not only on the side of 7 but also in a direction orthogonal to this direction.
  • the second bottom 25a of each of the pair of second recesses 25 positioned at the right end and the left end of the cutting insert 1 is visible.
  • the second concave portion 25 is preferably V-shaped having two straight portions in a cross section perpendicular to the extending direction of the second bottom portion 25a. This is because the progress of the crack is prevented in the second concave portion 25 and the second concave portion 25 can be stably used as a constraining surface to the holder 103 because the surface of the second concave portion 25 is a flat surface. .
  • the 2nd recessed part 25 is comprised by the two-step inclined surface from which an inclination angle differs. More specifically, the second concave portion 25 is located on the second bottom portion 25a side, and the second inclined surface 25b is located farther from the second bottom portion 25a than the first inclined surface 25b. It is comprised by the inclined surface 25c. Then, the angle ⁇ 2 formed by the second inclined surface 25c and the line parallel to the virtual straight line X is smaller than the angle ⁇ 1 formed by the first inclined surface 25b and the line parallel to the virtual straight line X.
  • the second concave portion 25 is constituted by the inclined surfaces in a plurality of stages as described above, a large depth of the second concave portion 25 can be ensured. Therefore, the progress of the crack can be more reliably stopped by the second recess 25. In addition, the thickness of the portion located between the second recess 25 and the upper surface 3 in the cutting insert 1 can also be ensured. Therefore, the strength of the cutting insert 1 can be increased and the occurrence of cracks themselves can be suppressed.
  • the second concave portion 25 when the cutting insert 1 is used for cutting, a force is applied to the cutting insert 1 from the upper surface 3 side toward the lower surface 5 side, that is, in a direction along the virtual straight line X. Will be added.
  • a crack may occur from the second concave portion 25 when the above force is transmitted to the second concave portion 25.
  • the second bottom portion 25a has an acute angle, a crack may occur from the second bottom portion 25a. Therefore, when it is desired to suppress cracks from the second concave portion 25, the second concave portion 25 preferably has a concave curve shape in a cross section in a direction perpendicular to the direction in which the second bottom portion 25a extends.
  • Cutting is performed by cutting the work material 201 with the upper cutting edge 9 of the cutting insert 1. At this time, the upper cutting edge 9 is pressed against the work material 201 in order to cut the work material 201. Therefore, a large force is applied to the land surface 15 in contact with the upper cutting edge 9 as compared with other regions of the upper surface 3. Therefore, a crack that progresses from the upper surface 3 to the lower surface 5 is likely to occur from the vicinity of the land surface 15.
  • the bottom portions (second bottom portions 25a) of the plurality of second recesses 25 are located closer to the center of the upper surface 3 than the land surface 15.
  • the second bottom portion 25 a is located closer to the central axis than the land surface 15.
  • the plurality of first recesses 23 are not symmetrical with respect to the first bottom 23a when viewed from the side, but are asymmetrical in shape. Specifically, in FIG. 5, there are two inclined parts, a first inclined part located on the left side of the first bottom part 23a and a second inclined part located on the right side of the first bottom part 23a. It is configured. The angle formed between the second inclined portion and the lower surface 5 is larger than the angle formed between the first inclined portion and the lower surface 5. And at least one part of the some 2nd recessed part 25 is located under the 2nd inclination part.
  • the cutting insert 1 of this embodiment has the lower cutting edge 11 formed in the intersection part of the lower surface 5 and the side surface 7 in addition to the upper cutting edge 9 formed in the intersection part of the upper surface 3 and the side surface 7. It has.
  • the lower cutting edge 11 can be made to function in the same manner as the upper cutting edge 9 by mounting upside down. Therefore, in the cutting insert 1 of this embodiment, the lower surface 5 has the same configuration as the upper surface 3. Specifically, the lower surface 5 has a land surface 15, a rake surface 17, a breaker surface 19, and a main surface, like the upper surface 3.
  • the lower cutting edge 11 has the same function as the upper cutting edge 9, the lower cutting edge 11 has an arcuate portion that is convex outward and a portion that is linear when viewed in plan. Yes.
  • the arc-shaped portion corresponds to the arc-shaped curved portion on the outer periphery of the lower surface 5.
  • Each arcuate portion of the lower cutting edge 11 is longer than the straight portion.
  • the lower cutting edge 11 includes a third recess 27 corresponding to the first recess 23 in the upper cutting edge 9. That is, the lower cutting edge 11 has a plurality of third recesses 27 that are recessed toward the upper surface 3.
  • the plurality of second recesses 25 are recessed toward the center of the lower surface 5 rather than the lower cutting edge 11 when seen in a plan view, and at least a part of each of the plurality of second recesses 25 is a plurality of
  • the third recess 27 is positioned above the bottom (third bottom 27a).
  • each of the plurality of second recesses 25 is positioned below each of the plurality of first bottom portions 23a and above each of the plurality of third bottom portions 27a. . That is, the recesses located below the plurality of first bottom portions 23a and the recesses located above the plurality of third bottom portions 27a are not formed independently, but only the second recesses 25 are formed. Has been. For this reason, it is possible to avoid the formation of the concave portion on the side surface 7 more than necessary, so that the durability of the cutting insert 1 can be enhanced.
  • the lower cutting edge 11 has four third recesses 27.
  • the four third recesses 27 are formed in each of the four arcuate curved portions of the lower cutting edge 11.
  • the plurality of third recesses 27 are arranged at equal intervals so that the interval between the adjacent third recesses 27 is constant.
  • the cutting tool 101 of the present embodiment includes a holder 103 having a rotation center axis Y and a plurality of the cutting inserts 1 as shown in FIG.
  • the holder 103 has a plurality of insert pockets 107 on the outer peripheral surface on the distal end side.
  • the plurality of cutting inserts 1 are mounted in the insert pockets 107, respectively.
  • the holder 103 has a substantially rotating body shape around the rotation center axis Y.
  • a plurality of insert pockets 107 are provided at equal intervals on the outer peripheral surface on the tip side of the holder 103.
  • the insert pocket 107 is a part to which the cutting insert 1 is mounted, and is open on the outer peripheral surface and the front end surface of the holder 103.
  • the insert pocket 107 includes a seating surface opposed to the rotation direction, and a plurality of restraining side surfaces that are positioned in a direction intersecting the seating surface and that are inclined in a direction approaching a normal to the seating surface as the distance from the seating surface increases. have.
  • a plurality of cutting inserts 1 are mounted in a plurality of insert pockets 107 provided in the holder 103.
  • the plurality of cutting inserts 1 are mounted such that the upper cutting edge 9 protrudes outward from the outer peripheral surface.
  • the plurality of cutting inserts 1 are mounted on the holder 103 such that the arcuate curved portion of the upper cutting edge 9 protrudes from the outer peripheral surface of the holder 103.
  • At least one of the plurality of second recesses 25 is in contact with the holder 103.
  • the second recess 25 in contact with the holder 103 functions as a constraining surface to the holder 103 of the cutting insert 1.
  • the cutting insert 1 is attached to the insert pocket 107 with a screw 105. That is, cutting is performed by inserting a screw 105 into the through hole 13 of the cutting insert 1, inserting the tip of the screw 105 into a screw hole (not shown) formed in the insert pocket 107, and screwing the screw portions together.
  • the insert 1 is attached to the holder 103.
  • the cutting insert 1 is mounted on the holder 103 so that the upper cutting edge 9 protruding outward from the outer peripheral surface has a negative axial rake angle and a negative radial rake angle.
  • steel, cast iron or the like can be used.
  • steel having high toughness among these members it is preferable to use steel having high toughness among these members.
  • the cut workpiece is produced by cutting a workpiece.
  • the cutting method in the present embodiment includes the following steps. That is, (1) a step of rotating the cutting tool 101 represented by the above embodiment; (2) a step of bringing the upper cutting edge 9 or the lower cutting edge 11 of the rotating cutting tool 101 into contact with the work material 201; (3) a step of separating the cutting tool 101 from the work material 201; It has.
  • the cutting tool 101 is rotated relatively close to the work material 201.
  • the upper cutting edge 9 of the cutting tool 101 is brought into contact with the work material 201 to cut the work material 201.
  • the cutting tool 101 is relatively moved away from the work material 201.
  • the work material 201 is fixed and the cutting tool 101 is approached. 13 and 14, the work material 201 is fixed and the cutting tool 101 is rotated. In FIG. 15, the work material 201 is fixed and the cutting tool 101 is moved away. Note that, in the cutting in the manufacturing method of the present embodiment, the work material 201 is fixed and the cutting tool 101 is moved in each step, but it is naturally not limited to such a form.
  • the work material 201 may be brought close to the cutting tool 101 in the step (1).
  • the work material 201 may be moved away from the cutting tool 101.
  • the state where the cutting tool 101 is rotated and the upper cutting edge 9 or the lower cutting edge 11 of the cutting insert 1 is brought into contact with a different part of the work material 201 may be repeated.
  • the cutting insert 1 is rotated by 90 degrees with respect to the central axis (virtual straight line X) of the through-hole 13, and the unused upper cutting edge 9
  • the lower cutting edge 11 may be used.
  • representative examples of the material of the work material 201 include carbon steel, alloy steel, stainless steel, cast iron, and non-ferrous metal.

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  • Milling Processes (AREA)

Abstract

Plaquette de coupe (1) selon un mode de réalisation de la présente invention pourvue d'une surface inférieure (5), d'une surface supérieure (3), d'une surface latérale (7) qui est reliée respectivement à la surface inférieure (5) et à la surface supérieure (3), et d'une lame de coupe supérieure (9) qui est positionnée sur la ligne d'intersection de la surface supérieure (3) et de la surface latérale (7). La lame de coupe supérieure (9) comprend plusieurs premières sections concaves (23) qui sont évidées vers la surface inférieure (5). La surface latérale (7) comprend plusieurs secondes sections concaves qui, lorsqu'on les observe depuis une perspective plane, sont évidées plus que la lame de coupe supérieure (9) vers le centre de la surface supérieure (9). Au moins une partie de chaque section de la pluralité de secondes sections concaves (25) est positionnée sous chaque première section inférieure (23a) de la pluralité de premières sections concaves (23).
PCT/JP2013/064870 2012-05-30 2013-05-29 Plaquette de coupe, outil de coupe et procédé de production d'objet coupé WO2013180160A1 (fr)

Priority Applications (1)

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JP2014518695A JP5815858B2 (ja) 2012-05-30 2013-05-29 切削インサート、切削工具および被削加工物の製造方法

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JP2012-123300 2012-05-30
JP2012123300 2012-05-30

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WO2013180160A1 true WO2013180160A1 (fr) 2013-12-05

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JP (1) JP5815858B2 (fr)
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Cited By (1)

* Cited by examiner, † Cited by third party
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CN104759675A (zh) * 2014-01-08 2015-07-08 山特维克知识产权股份有限公司 金属切削刀片和铣削刀具

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Publication number Priority date Publication date Assignee Title
JPH0253303U (fr) * 1988-10-12 1990-04-17
WO2011001939A1 (fr) * 2009-06-29 2011-01-06 京セラ株式会社 Plaquette de coupe, outil de coupe et procédé de fabrication pour produit coupé au moyen de celui-ci
WO2011111197A1 (fr) * 2010-03-10 2011-09-15 株式会社タンガロイ Plaquette de coupe et outil de coupe
WO2012002267A1 (fr) * 2010-06-30 2012-01-05 京セラ株式会社 Plaquette de coupe et outil de coupe, ainsi que procédé de fabrication d'une pièce à travailler qui est coupée à l'aide de ladite plaquette de coupe et dudit outil de coupe
EP2492035A1 (fr) * 2011-02-24 2012-08-29 Seco Tools AB Insert de découpe octogonale doté d'une partie de contour avec un angle de cale variable et outil de découpe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0253303U (fr) * 1988-10-12 1990-04-17
WO2011001939A1 (fr) * 2009-06-29 2011-01-06 京セラ株式会社 Plaquette de coupe, outil de coupe et procédé de fabrication pour produit coupé au moyen de celui-ci
WO2011111197A1 (fr) * 2010-03-10 2011-09-15 株式会社タンガロイ Plaquette de coupe et outil de coupe
WO2012002267A1 (fr) * 2010-06-30 2012-01-05 京セラ株式会社 Plaquette de coupe et outil de coupe, ainsi que procédé de fabrication d'une pièce à travailler qui est coupée à l'aide de ladite plaquette de coupe et dudit outil de coupe
EP2492035A1 (fr) * 2011-02-24 2012-08-29 Seco Tools AB Insert de découpe octogonale doté d'une partie de contour avec un angle de cale variable et outil de découpe

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104759675A (zh) * 2014-01-08 2015-07-08 山特维克知识产权股份有限公司 金属切削刀片和铣削刀具
EP2893995A1 (fr) * 2014-01-08 2015-07-15 Sandvik Intellectual Property AB Insert de découpe métallique et outil de fraisage
EP2893996A1 (fr) * 2014-01-08 2015-07-15 Sandvik Intellectual Property AB Insert de découpe métallique et outil de fraisage
JP2015128816A (ja) * 2014-01-08 2015-07-16 サンドビック インテレクチュアル プロパティー アクティエボラーグ 金属切削インサートおよびミーリング工具
US9975188B2 (en) 2014-01-08 2018-05-22 Sandvik Intellectual Property Ab Metal cutting insert and a milling tool
RU2678554C2 (ru) * 2014-01-08 2019-01-29 Сандвик Интеллекчуал Проперти Аб Металлорежущая пластина и фреза
EP2893995B1 (fr) 2014-01-08 2019-03-27 Sandvik Intellectual Property AB Insert de découpe métallique et outil de fraisage
CN111822766A (zh) * 2014-01-08 2020-10-27 山特维克知识产权股份有限公司 金属切削刀片和铣削刀具
CN104759675B (zh) * 2014-01-08 2021-07-06 山特维克知识产权股份有限公司 金属切削刀片和铣削刀具

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