WO2023176622A1 - ボーリング工具および切削加工物の製造方法 - Google Patents

ボーリング工具および切削加工物の製造方法 Download PDF

Info

Publication number
WO2023176622A1
WO2023176622A1 PCT/JP2023/008800 JP2023008800W WO2023176622A1 WO 2023176622 A1 WO2023176622 A1 WO 2023176622A1 JP 2023008800 W JP2023008800 W JP 2023008800W WO 2023176622 A1 WO2023176622 A1 WO 2023176622A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutter
tip
boring tool
rear end
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/008800
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
翔生 呉藤
享祐 土上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
Original Assignee
Kyocera Corp
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 Kyocera Corp filed Critical Kyocera Corp
Priority to CN202380026454.3A priority Critical patent/CN118843523A/zh
Priority to JP2024507803A priority patent/JP7747874B2/ja
Publication of WO2023176622A1 publication Critical patent/WO2023176622A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/03—Boring heads

Definitions

  • the present disclosure relates to a method for manufacturing a boring tool and a cut workpiece.
  • boring tools are used, for example, for internal diameter machining (boring/boring) of enlarging the inner diameter of a cylindrical workpiece by cutting the inner circumferential surface thereof.
  • Patent Documents 1 to 3 describe boring tools having a cylindrical shaft member and a cutting blade fixed such that the cutting edge protrudes outward from the outer peripheral surface of the shaft member.
  • a non-limiting example of a boring tool in the present disclosure includes a shaft member extending along a rotating shaft from a tip to a rear end, a first cutter located on a side of the tip and fixed to the shaft member, and a first cutter fixed to the shaft member. It has a second cutter located on the rear end side and fixed to the shaft member, and a third cutter located between the first cutter and the second cutter and fixed to the shaft member. The distance between the first cutter and the third cutter is greater than the distance between the second cutter and the third cutter.
  • the second cutter has a flat second tip face located on the side of the tip, a second cutting blade located on the outer peripheral side, and a position in front of the second cutting blade in the rotational direction of the rotating shaft.
  • the third cutter has a flat third tip surface located on the tip side, a third cutting blade located on the outer peripheral side, and a third cutting blade located in front of the third cutting blade in the rotation direction, and a third pocket connected to the third tip surface.
  • the second pocket is connected at a right angle to the second distal end surface, and the third pocket is connected at an obtuse angle to the third distal end surface.
  • FIG. 1 is a perspective view of a boring tool in a non-limiting embodiment of the present disclosure
  • FIG. FIG. 2 is a perspective view of the boring tool shown in FIG. 1 seen from another angle.
  • FIG. 3 is a front view of the boring tool shown in FIG. 2 when viewed from the tip side.
  • 4 is a side view of the boring tool shown in FIG. 1 viewed from the A1 direction shown in FIG. 3.
  • FIG. FIG. 4 is a side view of the boring tool shown in FIG. 1 viewed from direction A2 shown in FIG. 3;
  • 5 is a sectional view taken along the line VI-VI in FIG. 4.
  • FIG. 5 is a sectional view taken along the line VII-VII in FIG. 4.
  • FIG. 6 is a cross-sectional view taken along the line VIII-VIII in FIG. 5.
  • FIG. 5 is a sectional view taken along the line IX-IX in FIG. 4.
  • FIG. 6 is a sectional view taken along the line XX in FIG. 5.
  • FIG. FIG. 2 is a schematic diagram illustrating one step of a method for manufacturing a cut workpiece in a non-limiting embodiment of the present disclosure.
  • FIG. 2 is a schematic diagram illustrating one step of a method for manufacturing a cut workpiece in a non-limiting embodiment of the present disclosure.
  • FIG. 2 is a schematic diagram illustrating one step of a method for manufacturing a cut workpiece in a non-limiting embodiment of the present disclosure.
  • FIG. 2 is a schematic diagram illustrating one step of a method for manufacturing a cut workpiece in a non-limiting embodiment of the present disclosure.
  • each figure referred to below shows only the main members necessary for explaining the embodiment in a simplified manner. Accordingly, the rotary tool may include any components not shown in the referenced figures. Furthermore, the dimensions of the members in each figure do not faithfully represent the dimensions of the actual constituent members and the dimensional ratios of each member.
  • FIG. 1 is a perspective view showing a boring tool 1 in this embodiment.
  • FIG. 2 is a perspective view of the boring tool 1 seen from another angle.
  • FIG. 3 is a front view of the boring tool 1 shown in FIG. 2, viewed from the tip side.
  • FIG. 2 shows a perspective of the boring tool 1 viewed from a different angle with respect to FIG. 1, with the direction in which the rotation axis L extends different, and the boring tool 1 is rotated by 90 degrees around the rotation axis L from the state shown in FIG. 1.
  • 1 shows a perspective view of the boring tool 1 in a state where the boring tool 1 is in a state where it is
  • the rotation axis L refers to the rotation axis of the boring tool 1.
  • the boring tool 1 in this embodiment includes a plurality of cutters. Each of the plurality of cutters may have a different machining diameter.
  • the boring tool 1 is used, for example, for inner diameter machining to enlarge the inner diameter of a cylindrical workpiece WP (see FIG. 11, etc.) by cutting the inner circumferential surface thereof.
  • the boring tool 1 may be used, for example, for internal diameter machining of the housing (case) of an electric motor, etc. In this case, holes with different inner diameters are formed on the inner circumferential surface of the workpiece WP corresponding to the respective machining diameters of a plurality of cutters. A plurality of processing areas can be formed.
  • the boring tool 1 may be used for rough boring or fine boring.
  • the boring tool 1 may be used for enlarging the diameter of a pilot hole in the workpiece WP.
  • the pilot hole may be a through hole or a blind hole.
  • the boring tool 1 includes a shaft member 2 extending along a rotation axis L from a tip (first end) 2a toward a rear end (second end) 2b. There is.
  • the boring tool 1 has a connecting portion 3 that can be attached to, for example, a spindle (not shown) of a machine tool.
  • the boring tool 1 is attached to, for example, the spindle and is rotatable around the rotation axis L.
  • the connecting portion 3 may be a part of the shaft member 2, or may be a member attached to the shaft member 2 and separate from the shaft member 2.
  • the side where the connecting portion 3 is located is the rear end 2b side, and the side opposite to the rear end 2b is the feeding direction of the boring tool 1 (the machining direction with respect to the workpiece WP).
  • the side be the tip 2a side.
  • the rotation direction of the boring tool 1 is indicated by an arrow T
  • the feeding direction (processing direction) of the boring tool 1 during boring processing is indicated by an arrow S.
  • the direction perpendicular to the rotation axis L will be referred to as the radial direction
  • the direction away from the rotation axis L will be referred to as the outer peripheral side (radially outer side)
  • the rotation axis L The direction approaching the axis is sometimes referred to as the axial center side (radially inner side).
  • the direction of rotation around the rotation axis L may be referred to as the circumferential direction.
  • each part of the boring tool 1 may have rotational symmetry around the rotation axis L. Therefore, in the drawings, for clarity of illustration, the same reference numerals are not given to each of a plurality of members having similar shapes and functions, and only one of the plurality of members is designated. Reference signs may be attached.
  • the shaft member 2 includes a ring-shaped rear fixing part 5 located closer to the tip 2a than the connecting part 3, and a flat plate-shaped front fixing part 6 located closer to the tip 2a than the rear fixing part 5.
  • the base body part 4 may be located between the rear side fixing part 5 and the front side fixing part 6.
  • the rear fixing part 5 may be a part of the shaft member 2, or may be a separate member from the shaft member 2, which is attached to the outer surface of the shaft member 2.
  • the rear fixing part 5 may have a size larger in the radial direction than the base part 4.
  • the rear fixing portion 5 may have an external shape formed by processing a circular ring to form flat surfaces in four directions in the radial direction.
  • the rear fixing part 5 has four flat surfaces 5a located on four sides in the radial direction on the outer peripheral surface thereof, and four curved surfaces 5b having a convex shape on the outer peripheral side located between the four flat surfaces 5a. It may have the following.
  • the distal fixing portion 6 may be a part of the shaft member 2, or may be a separate member from the shaft member 2, which is attached to the distal end 2a side of the shaft member 2.
  • the front fixing part 6 may have a larger size in the radial direction than the base part 4.
  • the front fixing part 6 may have an external shape formed by rounding the four corners of a rectangular flat plate.
  • the front fixing part 6 has four flat surfaces 6a located on four sides in the radial direction, and four curved surfaces 6b convex on the outer peripheral side located between the four flat surfaces 6a. , may have.
  • a plurality of cutters C are attached to the base portion 4.
  • the plurality of cutters C may be fixed at different positions in the direction in which the rotation axis L extends in the base portion 4 (the longitudinal direction of the base portion 4).
  • the base portion 4 may have an external shape formed by, for example, rounding four corners of a rectangular parallelepiped.
  • the base portion 4 has four flat surfaces 4a located on each side in the radial direction, and four curved surfaces 4b having a convex shape on the outer peripheral side and located between the four flat surfaces 4a. good.
  • a coolant flow path may be formed inside the base portion 4, and the flow path communicates with a coolant flow path formed inside each of the plurality of cutters C attached to the base portion 4. good.
  • the coolant may be air or liquid, for example.
  • liquid coolants include water-insoluble oils and water-soluble oils such as emulsion-type, soluble-type, and solution-type cutting oils.
  • the position of the flat surface 5a of the rear fixing part 5 and the position of the curved surface 4b of the base part 4 correspond, and the position of the curved surface 5b of the rear fixing part 5 corresponds to the position of the curved surface 4b of the base part 4.
  • the position of the flat surface 6a of the distal fixing part 6 and the position of the flat plane 4a of the base part 4 correspond in the circumferential direction, and the position of the curved surface 6b of the distal fixing part 6 corresponds to the position of the flat plane 4a of the base part 4.
  • the position of the curved surface 4b may correspond.
  • the boring tool 1 may include, as the plurality of cutters C, a first cutter C10, a second cutter C20, and a third cutter C30.
  • the first to third cutters C10 to C30 may be collectively referred to as cutters C if they are not distinguished from each other.
  • the first cutter C10 is located on the side of the tip 2a and is fixed to the shaft member 2.
  • the first cutter C10 may include a first cutter body 11 and a first cartridge 13 as a cutting blade (first cutting blade) located on the outer peripheral side.
  • the first cutter body 11 includes a plate-shaped tip plate 15 and a plurality of first protrusions 17 that are formed to rise from the tip plate 15 toward the rear end 2b and protrude in the radial direction. may have.
  • the first protruding portion 17 may have a first pedestal portion 19 on the outer peripheral end thereof, to which the first cartridge 13 is attached.
  • the first cutter body 11 has a center hole through which the base portion 4 can be inserted.
  • the first cutter body 11 may have a plate shape, for example. Specifically, by digging and removing a part of a disc-shaped object having an annular shape in a cross-sectional view when cut in a direction perpendicular to the rotation axis L, the tip plate portion 15 and the plurality of first It may have a three-dimensional shape with a protrusion 17 formed therein.
  • the first cutter body 11 may have six first protrusions 17 that each protrude in six directions in the radial direction.
  • the tip plate portion 15 and the first protrusion portion 17 in the first cutter body 11 may be integrally formed so as to be continuous with each other.
  • the first cutter body 11 has the center hole formed in the shape of the base portion 4 (approximately octagonal shape in a cross-sectional view when cut in a direction perpendicular to the rotation axis L). Due to the correspondence, it may have a shape that is two-fold symmetrical around the rotation axis L.
  • the tip plate portion 15 may have a front plate surface 15a on the tip 2a side and a back plate surface 15b on the rear end 2b side.
  • the first cutter body 11 has a depression between two adjacent first protrusions 17, which is a space partially surrounded by the respective side surfaces of the two first protrusions 17 and the back plate surface 15b. It may have a section 16.
  • the recessed portion 16 is isolated from the tip 2a side by the tip plate portion 15 located on the tip 2a side. Thereby, when boring the work material WP with the boring tool 1, the tip plate portion 15 may block the front end 2a side and the rear end 2b side of the hole to be machined.
  • the chips in the boring tool 1 flow together with the coolant from the front end 2a side toward the rear end 2b side.
  • the recess 16 may be a chip pocket through which some of the chips generated by the cutting edge of the first cartridge 13 pass.
  • the first protrusion 17 may have a first outer peripheral surface 17c on the outer peripheral side.
  • the first outer circumferential surface 17c may be located forward of the first pedestal portion 19 in the rotation direction T and may be located in line with the first pedestal portion 19.
  • the first outer circumferential surface 17c is located radially inward than the first pedestal portion 19, and may be a surface formed at a position lower than the first pedestal portion 19 in the radial direction.
  • Coolant ejection holes H11 may be formed in the first outer circumferential surface 17c. Note that the coolant ejection holes H11 may be formed in the recessed portion 16 in addition to the first outer circumferential surface 17c.
  • the ejection hole H11 may be located closer to the rear end 2b than the first pedestal portion 19. Moreover, a coolant ejection hole H12 may be formed at a position near the first outer circumferential surface 17c on the top plate surface 15a. The coolant ejected from the ejection holes H12 passes through the first outer circumferential surface 17c, comes into contact with the cutting edge of the first cartridge 13, and flows toward the rear end 2b. The coolant ejected from the ejection holes H11 flows toward the rear end 2b together with the coolant ejected from the ejection holes H12.
  • the first cutter C10 only needs to have a cutting edge (first cutting edge) whose cutting edge protrudes from the outer peripheral surface of the first cutter body 11, and the specific form of the cutting edge located on the outer peripheral side is particularly limited. Not done.
  • one first cartridge 13 may be attached to the first pedestal portion 19 of each of the six first protrusions 17 using a clamp screw or the like.
  • the first cartridge 13 a known one can be used, and the specific form of the first cartridge 13 is not particularly limited.
  • a first insert (first cutting edge) 13a may be attached to the first cartridge 13 with a screw or the like.
  • the first insert 13a is a so-called cutting insert.
  • the specific aspect of the first insert 13a is not particularly limited.
  • At least one of the first cartridge 13 and the first insert 13a may be adjustable in position in the radial direction. Thereby, the machining diameter by the first cutter C10 can be adjusted.
  • the surface of the first cutter body 11 on the rear end 2b side is referred to as a first rear side surface 11b.
  • the first rear side surface 11b may be a surface of the first protrusion 17 on the rear end 2b side.
  • the first cutter C10 may be fixed to the shaft member 2 as follows. That is, the first cutter C10 may be fixed to the shaft member 2 by screwing the first rear side surface 11b and the plane 4a of the base portion 4 using the first fixture 18. In other words, the first cutter C10 may be fixed to the shaft member 2 by the first fixture 18 located closer to the rear end 2b than the first cutter body 11. In the first cutter C10, a part of the front plate surface 15a of the tip plate portion 15 may be in contact with the front side fixing portion 6.
  • the first cutter body 11 may be subjected to a thinning process for weight reduction, etc., and may have a plurality of recesses 15c formed in the top plate surface 15a of the tip plate portion 15.
  • the recessed portion 15c may have a rounded triangular shape when viewed from the direction along the rotation axis L.
  • the recessed portion 15c may be formed at a position corresponding to the tip 2a side of the first protrusion 17 when viewed from the tip 2a side toward the rear end 2b side.
  • the first cutter body 11 may have a plurality of recesses 11c formed in the first rear side surface 11b.
  • the recess 11c may have a rounded triangular shape when viewed from the direction along the rotation axis L.
  • the recess 11c is formed so as to avoid a region of the first rear side surface 11b where the first fixture 18 is screwed.
  • the second cutter C20 is located on the rear end 2b side and is fixed to the shaft member 2.
  • the second cutter C20 may include a second cutter body 21 and a second cartridge 23 as a cutting blade (second cutting blade) located on the outer peripheral side.
  • the second cutter body 21 may have a second protrusion 27 that protrudes in the radial direction.
  • the second protruding portion 27 may have a second pedestal portion 29 on the outer peripheral end thereof, to which the second cartridge 23 is attached.
  • the second cutter C20 has a second front end surface 27a that is a surface located on the front end 2a side of the second cutter body 21, and a second rear end surface 27b that is a surface located on the rear end 2b side.
  • the second front end surface 27a and the second rear end surface 27b may each be a flat surface.
  • flat surface or “plane” is intended to mean that the surface is not a curved surface that is visible or has no visible irregularities, and is strictly flat. I don't ask you to be.
  • a “flat surface” or “flat surface” may allow an unavoidable degree of unevenness that may occur during the manufacturing process, and specifically may have an unevenness with a surface roughness of about 50 ⁇ m.
  • the second cutter C20 is located in front of the second cartridge 23 as a second cutting blade in the rotation direction T of the rotation axis L, and has a second pocket 26 connected to the second tip surface 27a. It's okay to stay.
  • the second pocket 26 may also be connected to the second rear end surface 27b.
  • the second pocket 26 has a second groove 40 located along the second cartridge 23 and extending from the leading end 2a toward the rear end 2b.
  • the second groove 40 may be a surface extending from the leading end 2a toward the rear end 2b so as to connect the second leading end surface 27a and the second rear end surface 27b.
  • the second groove 40 may be a surface corresponding to a side surface (outer peripheral side surface) of the second cutter body 21, in other words, a surface corresponding to a side surface on the circumferential side of the second protrusion 27. good.
  • the second pocket 26 may be a space partially surrounded by the second groove 40.
  • the second groove 40 is located along the second insert (second cutting edge) 23a, and can be used as a chip discharge groove. When the second groove 40 is located along the second cutting edge, chips generated on the second cutting edge can be stably discharged to the outside.
  • the second cutter body 21 has a center hole through which the base portion 4 can be inserted.
  • the second cutter body 21 may have a plate shape, for example. Specifically, a three-dimensional shape in which a plurality of second protrusions 27 are formed is obtained by removing a part of a disk-shaped object that has an annular shape in a cross-sectional view when cut in a direction perpendicular to the rotation axis L. You may have one.
  • the second cutter body 21 may have six second protrusions 27 that protrude in six directions when viewed from the direction along the rotation axis L.
  • the second cutter body 21 may have a shape that is two-fold symmetrical about the rotation axis L.
  • the second pocket 26 is provided between two adjacent second protrusions 27 as a space penetrating from the front end 2a side to the rear end 2b side.
  • the second pocket 26 is a chip pocket through which chips and coolant flowing from the front end 2a side to the rear end 2b side pass.
  • the second cutter C20 may have six second pockets 26. In the second cutter C20, the second cutter body 21 does not need to have a coolant ejection hole.
  • the second cutter C20 only needs to have a cutting edge (second cutting edge) whose cutting edge protrudes from the outer circumferential surface of the second cutter body 21, and the specific form of the cutting edge located on the outer circumferential side is particularly limited. Not done.
  • one second cartridge 23 may be attached to the second pedestal portion 29 of each of the six second protrusions 27 using a clamp screw or the like. As the second cartridge 23, a known one can be used, and the specific form of the second cartridge 23 is not particularly limited.
  • a second insert (second cutting edge) 23a may be attached to the second cartridge 23 with a screw or the like.
  • the second insert 23a is a so-called cutting insert.
  • the specific aspect of the second insert 23a is not particularly limited. At least one of the second cartridge 23 and the second insert 23a may be adjustable in position in the radial direction. Thereby, the machining diameter by the second cutter C20 can be adjusted.
  • the second cutter C20 may be fixed to the shaft member 2 as follows. That is, the second cutter C20 may be fixed to the shaft member 2 by screwing the second rear end surface 27b and the flat surface 5a of the rear fixing part 5 using the second fixture 28. In other words, the second cutter C20 may be fixed to the shaft member 2 by the second fixture 28 located closer to the rear end 2b than the second cutter body 21. A portion of the second rear end surface 27b of the second cutter C20 may be in contact with the rear fixing portion 5.
  • the second cutter body 21 may be subjected to a thinning process to reduce weight, etc., and may have a plurality of recesses 27c formed in the second tip surface 27a. Further, the second cutter body 21 may have a plurality of recesses 27d formed in the second rear end surface 27b.
  • the recess 27c and the recess 27d may have a rounded triangular shape when viewed from the direction along the rotation axis L.
  • the recess 27c and the recess 27d may be formed at positions corresponding to the front end 2a side and the rear end 2b side of the second protrusion 27, respectively, when viewed from the front end 2a side toward the rear end 2b side.
  • the recessed portion 27d is formed so as to avoid a region of the second rear end surface 27b where the second fixture 28 is screwed.
  • the third cutter C30 is located between the first cutter C10 and the second cutter C20 and is fixed to the shaft member 2.
  • the third cutter C30 may include a third cutter body 31 and a third cartridge 33 as a cutting blade (third cutting blade) located on the outer peripheral side.
  • the third cutter body 31 may have a third protrusion 37 that protrudes in the radial direction.
  • the third protruding portion 37 may have a third pedestal portion 39 on the outer circumference side end portion to which the third cartridge 33 is attached.
  • the third cutter C30 has a third front end surface 37a that is a surface located on the front end 2a side of the third cutter body 31, and a third rear end surface 37b that is a surface located on the rear end 2b side.
  • the third front end surface 37a and the third rear end surface 37b may each be a flat surface.
  • the third cutter C30 is located in front of the third cartridge 33 as a third cutting blade in the rotation direction T of the rotation axis L, and has a third pocket 36 connected to the third tip surface 37a. It's okay to stay.
  • the third pocket 36 may also be connected to the third rear end surface 37b.
  • the third pocket 36 has a third groove 60 located along the third cartridge 33 and extending from the leading end 2a toward the rear end 2b.
  • the third groove 60 may be a surface extending from the leading end 2a toward the rear end 2b so as to connect the third leading end surface 37a and the third rear end surface 37b.
  • the third groove 60 may be a surface corresponding to a side surface (outer peripheral side surface) of the third cutter body 31, in other words, a surface corresponding to a side surface on the circumferential side of the third protrusion 37. good.
  • the third pocket 36 may be a space partially surrounded by the third groove 60.
  • the third groove 60 is located along the third insert (third cutting edge) 33a, and can be used as a chip discharge groove. When the third groove 60 is located along the third cutting edge, chips generated at the third cutting edge can be stably discharged to the outside.
  • the third cutter body 31 has a center hole through which the base portion 4 can be inserted.
  • the third cutter body 31 may have a plate shape, for example.
  • the plurality of third protrusions 37 were formed by removing a portion of a disk-shaped object having an annular shape in a cross-sectional view when cut in a direction perpendicular to the rotation axis L. It may have a three-dimensional shape.
  • the third cutter body 31 may have six third protrusions 37 that protrude in six directions when viewed from the direction along the rotation axis L.
  • the third cutter body 31 may have a shape that is two-fold symmetrical about the rotation axis L.
  • the third pocket 36 is provided as a space penetrating from the front end 2a side to the rear end 2b side between two adjacent third protrusions 37.
  • the third pocket 36 is a chip pocket through which chips and coolant flowing from the front end 2a side to the rear end 2b side pass.
  • the third cutter C30 may have six third pockets 36.
  • the third cutter C30 only needs to have a cutting edge (third cutting edge) whose cutting edge protrudes from the outer circumferential surface of the third cutter body 31, and the specific form of the cutting edge located on the outer circumferential side is particularly limited. Not done.
  • one third cartridge 33 may be attached to the third pedestal portion 39 of each of the six third protrusions 37 using a clamp screw or the like.
  • the third cartridge 33 a known one can be used, and the specific form of the third cartridge 33 is not particularly limited.
  • a third insert (third cutting edge) 33a may be attached to the third cartridge 33 with a screw or the like.
  • the third insert 33a is a so-called cutting insert.
  • the specific aspect of the third insert 33a is not particularly limited.
  • At least one of the third cartridge 33 and the third insert 33a may be adjustable in position in the radial direction. Thereby, the machining diameter by the third cutter C30 can be adjusted.
  • the third protruding portion 37 may have a third outer circumferential surface 37c that is located rearward of the third pedestal portion 39 in the rotation direction T and located alongside the third pedestal portion 39.
  • the third outer circumferential surface 37c may be a surface located on the radially outer side than the third pedestal part 39 and formed at a higher position than the third pedestal part 39 in the radial direction.
  • Coolant ejection holes H31 may be formed in the third outer peripheral surface 37c. The ejection hole H31 may be located closer to the rear end 2b than the third insert 33a.
  • the third protruding portion 37 may have a third seat surface 37d that is located forward of the third pedestal portion 39 in the rotation direction T and located alongside the third pedestal portion 39.
  • the third seating surface 37d may be a surface formed at the same height as the third pedestal portion 39 in the radial direction.
  • a coolant ejection hole H32 may be formed in the third seat surface 37d. The ejection hole H32 may be located further forward in the rotational direction T than the third insert 33a of the third cartridge 33, and may be located adjacent to the third insert 33a.
  • a coolant ejection hole H33 may be formed at a position near the third outer peripheral surface 37c on the third rear end surface 37b. The coolant ejected from the ejection holes H31 to H33 flows toward the rear end 2b.
  • a coolant ejection hole H33 may be further formed in the third rear end surface 37b of the third cutter body 31.
  • the ejection hole H33 may be formed at a position near the third outer circumferential surface 37c on the third rear end surface 37b. It may be formed at a position such that the coolant ejected from the ejection hole H33 flows toward the second cartridge 23 of the second cutter C20.
  • the coolant ejected from the ejection holes H31 to H33 flows toward the rear end 2b.
  • the third cutter C30 may be fixed to the shaft member 2 as follows. That is, the third cutter C30 may be fixed to the shaft member 2 by screwing the third tip surface 37a and the flat surface 4a of the base portion 4 using the third fixture 38. In other words, the third cutter C30 may be fixed to the shaft member 2 by the third fixture 38 located closer to the tip 2a than the third cutter body 31.
  • the third cutter body 31 may be subjected to a thinning process for weight reduction, etc., and may have a plurality of recesses 37e formed in the third tip surface 37a.
  • the recess 37e may have a rounded triangular shape when viewed from the direction along the rotation axis L.
  • the recess 37e may be formed at a position corresponding to the tip 2a side of the third protrusion 37 when viewed from the tip 2a side toward the rear end 2b side.
  • the recess 37e is formed so as to avoid a region of the third end surface 37a where the third fixture 38 is screwed.
  • FIG. 4 is a side view of the boring tool 1 shown in FIG. 1 viewed from the A1 direction shown in FIG. 3.
  • FIG. 5 is a side view of the boring tool 1 shown in FIG. 1 viewed from direction A2 shown in FIG. 3.
  • FIG. 6 is a sectional view taken along the line VI-VI in FIG. 7 is a sectional view taken along the line VII-VII in FIG. 4.
  • FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 9 is a sectional view taken along the line IX-IX in FIG. 4.
  • FIG. FIG. 10 is a sectional view taken along the line XX in FIG.
  • FIGS. 1 to 3 can also be referred to as appropriate.
  • the distance D1 between the first cutter C10 and the third cutter C30 is larger than the distance D2 between the second cutter C20 and the third cutter C30. There is. Depending on the use of the boring tool 1, such an arrangement of the cutter C may be required. It is also assumed that the space between the first cutter C10 and the third cutter C30 is used as a coolant reservoir.
  • chips generated by the first cutter C10 on the front end 2a side flow toward the rear end 2b side, pass through the third cutter C30 and the second cutter C20, and are discharged to the outside. .
  • a boring tool with multiple cutters can increase machining efficiency.
  • the plurality of cutters are located far apart, it is difficult for chips to smoothly flow into the pocket of the cutter on the rear end side, and as a result, there is a risk of damaging the cutter on the rear end side or the workpiece.
  • the second pocket 26 is connected at a right angle to the second tip surface 27a
  • the third pocket 36 is connected at an obtuse angle to the third tip surface 37a. It's fine. Note that the "right angle” in the above is not limited to 90° in a strict sense, but may be in the range of ⁇ 5°. Further, since a right angle is in the range of 90 ⁇ 5°, an “obtuse angle” is intended to be larger than 95°.
  • the coolant and chips generated by the first cutter C10 can easily flow from the space 90 between the first cutter C10 and the third cutter C30 to the third pocket 36. , it can be made easier to flow from the third pocket 36 to the second pocket 26. Therefore, although the boring tool 1 has a plurality of cutters C, it is possible to effectively improve chip discharge performance.
  • the third groove 60 that partially surrounds the third pocket 36 and extends from the tip 2a to the rear end 2b is located on the tip 2a side and connected to the third tip surface 37a. and a third rear region 62 located closer to the rear end 2b than the third front region 61.
  • the inclination angle ⁇ 1 of the third forward region 61 with respect to the third distal end surface 37a may be larger than the inclination angle ⁇ 2 of the third rear region 62 with respect to the third distal end surface 37a (see FIG. 9).
  • the inclination angle ⁇ 1 is determined by a cross section of the boring tool 1 taken in a direction parallel to the rotation axis L and perpendicular to the protruding direction (normal direction of the plane 4a) of one third protrusion 37 (for example, as shown in FIG. 9). In the cross-sectional view shown), this is the angle at which the third forward region 61 is inclined with respect to the third tip surface 37a.
  • the inclination angle ⁇ 1 is an obtuse angle, and may be an angle of 120° or more and 160° or less.
  • the inclination angle ⁇ 2 is the angle at which the third rear region 62 is inclined with respect to the third tip surface 37a in the above-mentioned cross section (for example, the cross-sectional view shown in FIG. 9).
  • the tilt angle ⁇ 2 may be a right angle and may be in the range of 90 ⁇ 5°.
  • chips generated by the first cutter C10 are easily drawn into the third pocket 36. Further, when the inclination angle ⁇ 1 of the third front region 61 is larger than the inclination angle ⁇ 2 of the third rear region 62, the strength of the third protruding portion 37 of the third cutter C30 is ensured, and the chip evacuation property is improved. can be increased.
  • the width W of the portion of the third front region 61 that is located forward of the bottom 63 of the third groove 60 in the rotation direction T may become narrower toward the front in the rotation direction T (see FIG. (see 4).
  • the bottom of the third groove 60 is a portion of the third groove 60 that is located closest to the axis (inner side in the radial direction).
  • the above-mentioned width W is, in a side view of the boring tool 1, from the ridge line R1 where the third tip surface 37a and the third forward region 61 intersect with each other to the boundary B1 between the third forward region 61 and the third rear region 62. It is defined by the distance in the direction parallel to the rotation axis L (see FIGS. 4, 6, and 7).
  • the width W of the third front region 61 which is formed as a cutout portion closer to the axis than the third rear region 62, becomes smaller as it approaches the third pedestal portion 39. Become. Therefore, the third protruding portion 37 of the third cutter C30 can easily secure the volume in the rear portion of the third pedestal portion 39 in the rotation direction T. As a result, the strength of the third protrusion 37 can be easily ensured.
  • the second groove 40 of the second cutter C20 which partially surrounds the second pocket 26 and extends from the front end 2a to the rear end 2b, connects the first partial groove 41 and the second partial groove 42. You may have one.
  • the first partial groove 41 is a portion located along the second cartridge 23 (second cutting edge) and extends from the tip 2a side toward the rear end 2b side
  • the second partial groove 42 is a portion located along the second cartridge 23 (second cutting edge). It may be located in front of the groove 41 in the rotation direction T and may extend from the tip end 2a side toward the rear end 2b side.
  • the first partial groove 41 and the second partial groove 42 may each be a curved surface that is concave toward the second protrusion 27 in a cross section taken in a direction perpendicular to the rotation axis L.
  • the second groove 40 is the intersection of the first partial groove 41 and the second partial groove 42, and may have a ridge 43 extending from the front end 2a side toward the rear end 2b side (FIGS. 4 and 5). , 6, 8).
  • the ridge portion 43 may be a ridge line or may be a ridge portion having some width.
  • the first partial groove 41 rotates with respect to the third cartridge 33 (third cutting edge) of the third cutter C30. It may be located at the rear in direction T (see FIG. 6).
  • the chips generated by the second cutter C20 are removed from the portion of the second pocket 26 where the first partial groove 41 is located, in other words, the rear end 2b of the third protrusion 37 when seen through the plane.
  • the flow can be made easier in the second pocket 26 located on the side.
  • the second partial groove 42 may at least partially overlap the third groove 60 (FIG. 6, (see 7).
  • the coolant and chips generated by the third cutter C30 easily flow from the third pocket 36 to the rear end 2b side through the portion of the second pocket 26 where the second partial groove 42 is located. can do.
  • the chips generated by the second cutter C20 preferentially pass through, and the chips generated by the third cutter C30 preferentially pass through. and a portion passing through. Therefore, chips can easily flow from the front end 2a side to the rear end 2b side. As a result, the evacuation of chips can be effectively improved.
  • the third cutter C30 has its third tip end surface 37a attached to the flat surface 4a of the base portion 4 using the third fixture 38
  • the second cutter C20 has its third end face 37a attached to the flat surface 4a of the base portion 4 using the second fixture 28.
  • the rear end surface 27b may be attached to the flat surface 5a of the rear fixing part 5.
  • the plane 4a and the plane 5a may be offset by 45 degrees from each other in the circumferential direction, so that the third protrusion 37 and the second protrusion 27 are shifted from each other in the circumferential direction, and the third cutter C30 and the second cutter C20 can be fixed to the base portion 4.
  • the arrangement of the coolant jet holes H31 to H33 in the second cutter body 21 of the second cutter C20 makes it possible to more easily cause the flow of chips as described above.
  • the second groove 40 may have a second forward region 44 located on the distal end 2a side and a second rear region 45 located on the rear end 2b side.
  • the inclination angle of the second forward region 44 with respect to the rotation axis L is a first inclination angle ⁇ 3
  • the inclination angle of the second rear region 45 with respect to the rotation axis L is a second inclination angle ⁇ 4.
  • the second inclination angle ⁇ 4 may be larger than the first inclination angle ⁇ 3 (see FIGS. 4, 5, and 10).
  • the first inclination angle ⁇ 3 may be substantially close to 0.
  • the second inclination angle ⁇ 4 may be an angle of 10° or more and 20° or less.
  • the area can be shaped to expand toward the rear end 2b side (the exit side in the direction in which chips flow). Therefore, the chips that have flowed into the second pocket 26 can flow toward the rear end 2b side rather than the second pocket 26, and can be easily discharged to the outside. As a result, the chip discharge performance can be further improved.
  • the second groove 40 may have a first inclination angle ⁇ 3 of 0°, and a second forward region 44 extending parallel to the rotation axis L. This allows chips to flow easily from the third pocket 36 to the second pocket 26.
  • each part of the boring tool 1 examples include steel such as stainless steel, cast iron, and aluminum alloy. In particular, when steel is used among these members, the shaft member 2 has high toughness.
  • the material of the cutting blades such as the first insert 13a to the third insert 33a include cemented carbide and cermet.
  • composition of the cemented carbide examples include WC-Co, WC-TiC-Co, and WC-TiC-TaC-Co.
  • WC, TiC, and TaC may be hard particles
  • Co may be a binder phase.
  • the cermet may be a sintered composite material in which a metal is combined with a ceramic component.
  • cermets include titanium compounds containing titanium carbide (TiC) or titanium nitride (TiN) as a main component.
  • the cutting edge used in the boring tool 1 is not limited to the above materials.
  • the size of the shaft member 2 is not particularly limited.
  • the length in the direction along the rotation axis L can be set to about 150 mm to 300 mm.
  • the diameter of the shaft member 2, which corresponds to the thickness of the base portion 4 can be set to about 50 mm to 120 mm.
  • the working diameters of the first cutter C10, the second cutter C20, and the third cutter C30 are not particularly limited.
  • the machining diameter of the cutter C is defined by the diameter of the cutting circle of the cutting edge of the cutter C.
  • the machining diameter of the first cutter C10 may be smaller than the machining diameters of the second cutter C20 and the third cutter C30.
  • the machining diameter of the third cutter C30 may be larger than the machining diameter of the first cutter C10 and smaller than the machining diameter of the second cutter C20.
  • the machining diameter of the first cutter C10 can be set to about 60 mm to 280 mm.
  • the machining diameter of the second cutter C20 can be set to about 160 mm to 280 mm.
  • the machining diameter of the third cutter C30 can be set to about 140 mm to 280 mm.
  • the distance D1 between the first cutter C10 and the third cutter C30 may be approximately 60 mm to 150 mm.
  • the distance D2 between the second cutter C20 and the third cutter C30 may be approximately 10 mm to 80 mm.
  • the boring tool 1 may have four or more cutters C without being limited to the example of this embodiment.
  • a fourth cutter may be provided between the first cutter C10 and the third cutter C30.
  • the first cutter C10, the second cutter C20, and the third cutter C30 may each be formed integrally with the shaft member 2 so as to be continuous with the shaft member 2, without being limited to the example of this embodiment.
  • the cutting blades of the first cutter C10, the second cutter C20, and the third cutter C30 may be formed integrally with the first cutter body 11, the second cutter body 21, and the third cutter body 31, respectively.
  • the first cutter C10 and the third cutter C30 may each be screwed to the curved surface 4b of the base portion 4, without being limited to the example of this embodiment.
  • the second cutter C20 may be screwed to the curved surface 5b of the rear fixing portion 5.
  • the specific means by which the first cutter C10, the second cutter C20, and the third cutter C30 are fixed to the shaft member 2 is not particularly limited, and the specific shape of the shaft member 2 is not particularly limited.
  • FIGS. 11 to 14 are schematic diagrams showing one step of the method for manufacturing a cut workpiece. For clarity of illustration, the cross section of the workpiece WP is shown, while the boring tool 1 is shown as seen from the side.
  • the cut workpiece is produced by cutting the work material WP.
  • the method for manufacturing a cut workpiece in the embodiment includes the following steps. That is, (1) a step of rotating the boring tool 1; (2) a step of bringing the boring tool 1 into contact with the work material WP; (3) a step of separating the boring tool 1 from the work material WP; have.
  • the boring tool 1 may be rotated around the rotation axis L and brought relatively close to the cylindrical workpiece WP.
  • the boring tool 1 is rotated by connecting the connecting portion 3 of the boring tool 1 to a spindle or the like.
  • the boring tool 1 is further advanced into the workpiece WP.
  • the cutting edge of the third cutter C30 is brought into contact with the first processing area 101 to form a third processing area 102 processed by the third cutter C30, which has an inner diameter wider than the first processing area 101.
  • the cutting edge of the second cutter C20 is brought into contact with the third processing area 102 to form a second processing area 103 processed by the second cutter C20, which has an inner diameter wider than the third processing area 102. can.
  • the boring tool 1 may be moved relatively away from the workpiece WP.
  • the workpiece WP is fixed and the boring tool 1 is moved while being rotated around the rotation axis L to approach the workpiece WP.
  • the workpiece WP is cut by bringing the cutting edge of the rotating boring tool 1 into contact with the fixed workpiece WP.
  • the boring tool 1 is moved away from the workpiece WP in a fixed state.
  • the boring tool 1 in each step, the boring tool 1 is moved to bring the boring tool 1 into contact with the workpiece WP or to separate it from the workpiece WP.
  • the present invention is not limited to this form.
  • the workpiece WP may be brought closer to the boring tool 1.
  • the workpiece WP may be moved away from the boring tool 1.
  • the present invention is not necessarily limited to the above example, and the work material WP may be rotated. By rotating the boring tool 1 relative to the workpiece WP, the workpiece WP can be cut.
  • Typical examples of the material of the work material WP include hardened steel, carbon steel, alloy steel, stainless steel, cast iron, and non-ferrous metals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
PCT/JP2023/008800 2022-03-16 2023-03-08 ボーリング工具および切削加工物の製造方法 Ceased WO2023176622A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202380026454.3A CN118843523A (zh) 2022-03-16 2023-03-08 镗孔刀具及切削加工物的制造方法
JP2024507803A JP7747874B2 (ja) 2022-03-16 2023-03-08 ボーリング工具および切削加工物の製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-041731 2022-03-16
JP2022041731 2022-03-16

Publications (1)

Publication Number Publication Date
WO2023176622A1 true WO2023176622A1 (ja) 2023-09-21

Family

ID=88023155

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/008800 Ceased WO2023176622A1 (ja) 2022-03-16 2023-03-08 ボーリング工具および切削加工物の製造方法

Country Status (3)

Country Link
JP (1) JP7747874B2 (https=)
CN (1) CN118843523A (https=)
WO (1) WO2023176622A1 (https=)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011062790A (ja) * 2009-09-18 2011-03-31 Allied Material Corp 回転切削工具
CN209935971U (zh) * 2019-05-06 2020-01-14 江苏茂厚汇机械设备有限公司 一种油泵泵体铣面铣刀
CN210412745U (zh) * 2019-04-29 2020-04-28 江苏茂厚汇机械设备有限公司 一种变速箱外壳用高速多刃铣刀
JP2020203353A (ja) * 2019-06-18 2020-12-24 真辺工業株式会社 回転切削工具

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011062790A (ja) * 2009-09-18 2011-03-31 Allied Material Corp 回転切削工具
CN210412745U (zh) * 2019-04-29 2020-04-28 江苏茂厚汇机械设备有限公司 一种变速箱外壳用高速多刃铣刀
CN209935971U (zh) * 2019-05-06 2020-01-14 江苏茂厚汇机械设备有限公司 一种油泵泵体铣面铣刀
JP2020203353A (ja) * 2019-06-18 2020-12-24 真辺工業株式会社 回転切削工具

Also Published As

Publication number Publication date
JP7747874B2 (ja) 2025-10-01
CN118843523A (zh) 2024-10-25
JPWO2023176622A1 (https=) 2023-09-21

Similar Documents

Publication Publication Date Title
US10456847B2 (en) Cutting tool and method for manufacturing machined product
EP2459337B1 (en) Cutting insert and rotary cutting tool
CN103028770B (zh) 铣刀及其切削刀片
JP5944527B2 (ja) 切削インサート、切削工具および切削加工物の製造方法
CN111148590B (zh) 切削刀片、切削刀具以及切削加工物的制造方法
JPWO2019244796A1 (ja) 回転工具及び切削加工物の製造方法
US10384275B2 (en) Cutting tool and method for manufacturing the machined product
CN115515740A (zh) 钻头以及切削加工物的制造方法
JP7155407B2 (ja) 切削インサート、切削工具及び切削加工物の製造方法
WO2016208772A1 (ja) 切削工具及び切削加工物の製造方法
JP6185376B2 (ja) 切削インサート、切削工具および被削加工物の製造方法
JP7020162B2 (ja) スクエアエンドミル
JP7344321B2 (ja) 回転工具及び切削加工物の製造方法
US10792738B2 (en) Cutting tool and method of manufacturing machined product
JP7747874B2 (ja) ボーリング工具および切削加工物の製造方法
WO2024048257A1 (ja) 切削インサート、切削工具、及び切削加工物の製造方法
JPH10118824A (ja) たて型チップおよびそれを備えたフライス
JP7045460B2 (ja) 切削工具及び切削加工物の製造方法
JP7746403B2 (ja) ホルダ、切削工具及び切削加工物の製造方法
JP7660695B2 (ja) 回転工具および切削加工物の製造方法
WO2025182455A1 (ja) 切削インサート、切削工具及び切削加工物の製造方法
WO2026034060A1 (ja) 切削インサート、切削工具及び切削加工物の製造方法
WO2026088668A1 (ja) ドリル、及び切削加工物の製造方法
WO2025074852A1 (ja) 切削インサート、切削工具、および切削加工物の製造方法
JP2025133477A (ja) 切削インサート、切削工具及び切削加工物の製造方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23770578

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202380026454.3

Country of ref document: CN

ENP Entry into the national phase

Ref document number: 2024507803

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 23770578

Country of ref document: EP

Kind code of ref document: A1