WO2022185396A1 - 押さえ部材および切削工具 - Google Patents
押さえ部材および切削工具 Download PDFInfo
- Publication number
- WO2022185396A1 WO2022185396A1 PCT/JP2021/007821 JP2021007821W WO2022185396A1 WO 2022185396 A1 WO2022185396 A1 WO 2022185396A1 JP 2021007821 W JP2021007821 W JP 2021007821W WO 2022185396 A1 WO2022185396 A1 WO 2022185396A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flow path
- pressing member
- cross
- coolant
- wall surface
- Prior art date
Links
- 239000002826 coolant Substances 0.000 claims abstract description 105
- 230000007423 decrease Effects 0.000 claims description 8
- 239000012530 fluid Substances 0.000 description 12
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
- B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
- B23B27/1666—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with plate-like cutting inserts clamped by a clamping member acting almost perpendicularly on chip-forming plane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/10—Cutting tools with special provision for cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
- B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
- B23B27/1677—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with plate-like cutting inserts clamped by a clamping member acting almost perpendicularly on the chip-forming plane and at the same time upon the wall of a hole in the insert
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
Definitions
- the present disclosure relates to pressing members and cutting tools.
- Patent Document 1 describes a cutting tool holder that supports a cutting insert.
- the cutting tool holder has a pressing member for positioning and fixing the cutting insert to the holder body.
- a pressing member is a pressing member for fixing a cutting insert to a holder, and includes a first body portion, a second body portion, and a third body portion.
- a coolant inlet is formed in the first body portion.
- a coolant ejection port is formed in the second body portion.
- the third body portion is positioned between the first body portion and the second body portion.
- a first flow path is formed in the first body portion to extend along the first direction and continue to the coolant inlet.
- a second flow path is formed in the second main body, which continues to the coolant ejection port and extends along a second direction that is inclined with respect to the first direction.
- the third body portion has boundary flow paths that connect to each of the first flow path and the second flow path.
- the boundary channel is formed by a pair of boundary wall surfaces facing each other.
- the inclination of the tangent to the boundary wall surface continuously changes.
- the direction in which the pair of boundary wall surfaces face each other is defined as the vertical direction
- the direction perpendicular to the vertical direction is defined as the horizontal direction.
- FIG. 1 is a schematic perspective view showing the configuration of the cutting tool according to the first embodiment.
- FIG. 2 is a schematic perspective view showing the configuration of the cutting tool holder according to the first embodiment.
- FIG. 3 is a schematic perspective view showing the configuration of the pressing member according to the first embodiment.
- FIG. 4 is a schematic plan view showing the configuration of the pressing member according to the first embodiment.
- FIG. 5 is a schematic cross-sectional view showing a first cross section of the pressing member according to the first embodiment.
- FIG. 6 is a schematic cross-sectional view showing the configuration of the first main body in a second cross section perpendicular to the first direction.
- FIG. 7 is a schematic cross-sectional view showing the configuration of the second main body in a second cross section perpendicular to the second direction.
- FIG. 1 is a schematic perspective view showing the configuration of the cutting tool according to the first embodiment.
- FIG. 2 is a schematic perspective view showing the configuration of the cutting tool holder according to the first embodiment.
- FIG. 8 is a schematic cross-sectional view showing a third cross section of the pressing member according to the first embodiment.
- FIG. 9 is a schematic perspective view showing the configuration of the cutting tool according to the second embodiment.
- FIG. 10 is a schematic perspective view showing the configuration of the cutting tool holder according to the second embodiment.
- FIG. 11 is a schematic perspective view showing the configuration of a pressing member according to the second embodiment.
- FIG. 12 is a schematic plan view showing the configuration of a pressing member according to the second embodiment.
- FIG. 13 is a schematic cross-sectional view showing the first cross section of the pressing member according to the second embodiment.
- FIG. 14 is a schematic cross-sectional view showing a third cross section of the pressing member according to the second embodiment.
- FIG. 15 is a schematic cross-sectional view showing the first cross section of the pressing member according to the third embodiment.
- 16 is a schematic cross-sectional view showing the structure of the pressing member according to sample 1.
- An object of the present disclosure is to provide a pressing member and a cutting tool that can reduce fluid energy loss.
- the pressing member 100 is a pressing member 100 for fixing the cutting insert 70 to the holder 50, and includes the first body portion 1, the second body portion 2, and the third body portion 3. It has A coolant inlet 5 is formed in the first body portion 1 .
- a coolant ejection port 6 is formed in the second body portion 2 .
- the third body portion 3 is positioned between the first body portion 1 and the second body portion 2 .
- a first flow passage 10 is formed in the first body portion 1 so as to continue to the coolant inlet 5 and extend along the first direction D1.
- a second flow passage 20 is formed in the second body portion 2 so as to continue to the coolant ejection port 6 and extend along a second direction D2 that is inclined with respect to the first direction D1.
- a boundary channel 30 is formed in the third body portion 3 so as to communicate with each of the first channel 10 and the second channel 20 .
- the boundary channel 30 is constituted by a pair of boundary wall surfaces 33 facing each other. In at least one of the pair of boundary wall surfaces 33, the inclination of the tangent to the boundary wall surface changes continuously.
- the second cross section S2 perpendicular to the direction in which the coolant flows, the direction in which the pair of boundary wall surfaces 33 face each other is defined as the vertical direction, and the direction perpendicular to the vertical direction is defined as the horizontal direction.
- the first flow path 10 has the constricted portion 41 in which the width of the first flow path 10 monotonously decreases toward the second flow path 20.
- the diaphragm portion 41 has the first side face 11 and the second side face facing each other. 12 may be configured.
- the first side 11 may be straight and the second side 12 may be curved.
- the diaphragm portion 41 has the first side face 11 and the second side face facing each other. 12 may be configured. Each of the first side surface 11 and the second side surface 12 may be linear. Each of the first side surface 11 and the second side surface 12 may be inclined with respect to the first direction D1.
- the pressing member 100 may further include the cylindrical portion 4 projecting from the second body portion 2 .
- the ejection surface on which the coolant ejection port 6 is formed may be parallel to the central axis A of the cylindrical portion 4 .
- the second flow path 20 is defined by the third side surface 23 and the fourth side surface 24 facing each other.
- the third side surface 23 may have the first wall surface 21 separated from the coolant jet 6 by 1 mm or more.
- the fourth side surface 24 may have a second wall surface 22 that is 1 mm or more away from the coolant jet 6 .
- the first wall surface 21 may be parallel to the second wall surface 22 .
- the first flow path 10 has the constricted portion 41 in which the width of the first flow path 10 monotonously decreases toward the second flow path 20.
- the pressing member 100 may further include a cylindrical portion 4 protruding from the second body portion 2 .
- the ejection surface on which the coolant ejection port 6 is formed may be parallel to the central axis A of the cylindrical portion 4 .
- the second flow path 20 may be configured by a third side surface 23 and a fourth side surface 24 facing each other.
- the third side surface 23 may have the first wall surface 21 separated from the coolant jet 6 by 1 mm or more.
- the fourth side surface 24 may have a second wall surface 22 that is 1 mm or more away from the coolant jet 6 .
- the first wall surface 21 may be parallel to the second wall surface 22 .
- a cutting tool 200 according to the present disclosure includes the pressing member 100 described in any one of (1) to (7) above, and a holder 50 in which the pressing member 100 is arranged.
- the cutting tool 200 according to (8) above may further include the cutting insert 70 in contact with the pressing member 100 .
- FIG. 1 is a schematic perspective view showing the configuration of a cutting tool 200 according to the first embodiment.
- a cutting tool 200 according to the first embodiment mainly has a holder 50, a cutting insert 70, a pressing member 100, a sole plate 80, and a fastening member 60.
- the holder 50 has an insert holding portion 52 and a support portion 51 .
- the insert holding portion 52 continues to the support portion 51 .
- a cutting insert 70 , a floor plate 80 , a pressing member 100 , and a fastening member 60 are arranged in the insert holding portion 52 .
- Support portion 51 is attached to, for example, a machine tool.
- the cutting insert 70 has a top surface 71 , an outer peripheral surface 72 and a cutting edge 73 . At least part of the top surface 71 functions as a rake surface. At least part of the outer peripheral surface 72 functions as a flank. A ridge line between the top surface 71 and the outer peripheral surface 72 constitutes a cutting edge 73 . When viewed in a direction perpendicular to top surface 71, the contour of top surface 71 is substantially a parallelogram. A hole 74 is formed in the top surface 71 .
- the cutting insert 70 contacts the pressing member 100 .
- the pressing member 100 partially covers the top surface 71 of the cutting insert 70 .
- the pressing member 100 fixes the cutting insert 70 to the holder 50 .
- the pressing member 100 positions the cutting insert 70 .
- the pressing member 100 is fixed to the holder 50 by a fastening member 60 .
- the cutting insert 70 is in contact with the sole plate 80 .
- the sole plate 80 is positioned between the cutting insert 70 and the holder 50 .
- the sole plate 80 is in contact with the holder 50 .
- the pressing member 100 has a coolant ejection port 6.
- the coolant jet 6 faces the corner portion of the cutting edge 73 of the cutting insert 70 .
- a coolant injection port 91 is provided in the insert holding portion 52 of the holder 50 .
- the coolant injection port 91 faces the corner portion of the cutting edge 73 of the cutting insert 70 .
- the coolant jetted from the coolant ejection port 6 is jetted toward the cutting edge 73 from the top surface 71 side (upper side) of the cutting insert 70 .
- the coolant injected from the coolant injection port 91 is injected toward the cutting edge 73 from the outer peripheral surface 72 side (lower side) of the cutting insert 70 .
- FIG. 2 is a schematic perspective view showing the configuration of the holder 50 of the cutting tool 200 according to the first embodiment.
- the insert holding portion 52 of the holder 50 of the cutting tool 200 according to the first embodiment has an upper surface 54, a first end surface 53 and a second end surface 55.
- the upper surface 54 continues to each of the first end surface 53 and the second end surface 55 .
- the first end surface 53 continues to the second end surface 55 .
- a protrusion 56 is provided at the boundary between the first end face 53 and the second end face 55 .
- a coolant injection port 91 is provided in the protrusion 56 .
- a second recess 92 , a third recess 93 , and a fourth recess 94 are formed in the insert holding portion 52 .
- a cutting insert 70 and a floor plate 80 are arranged in the second recess 92 .
- the second recessed portion 92 is exposed on each of the first end surface 53 , the second end surface 55 and the upper surface 54 .
- the third recessed portion 93 is provided on the upper surface 54 .
- a portion of the fastening member 60 is arranged in the third recess 93 .
- a fourth recess 94 is provided in the upper surface 54 .
- a part of the pressing member 100 is arranged in the fourth concave portion 94 .
- FIG. 3 is a schematic perspective view showing the configuration of the pressing member 100 according to the first embodiment.
- FIG. 4 is a schematic plan view showing the configuration of the pressing member 100 according to the first embodiment.
- the pressing member 100 includes a first main body portion 1, a second main body portion 2, a third main body portion 3, a cylindrical portion 4, and a bottom surface 9. It mainly has A coolant inlet 5 is formed in the first body portion 1 .
- the coolant inlet 5 is a portion through which coolant is introduced into the pressing member 100 .
- Coolant is introduced into the pressing member 100 from the fourth recess 94 of the holder 50 .
- a coolant ejection port 6 is formed in the second body portion 2 .
- the coolant ejection port 6 is a portion through which coolant is ejected from the pressing member 100 .
- the third body portion 3 is positioned between the first body portion 1 and the second body portion 2 .
- a through hole 7 is provided in the pressing member 100 .
- a fastening member 60 is inserted into the through hole 7 .
- the pressing member 100 is fixed to the holder 50 by the fastening member 60 .
- the bottom surface 9 is arranged to face the top surface 71 of the cutting insert 70 .
- a first concave portion 8 is provided in the bottom surface 9 .
- the first body portion 1 is provided so as to protrude from the bottom surface 9 .
- the first body portion 1 is a tubular member.
- An annular groove 95 is provided on the outer peripheral surface of the first body portion 1 .
- the cylindrical portion 4 protrudes from the second body portion 2 . Cylindrical portion 4 extends in a direction substantially perpendicular to bottom surface 9 .
- the cylindrical portion 4 is arranged in a hole portion 74 provided in the top surface 71 of the cutting insert 70 .
- a first flow path 10 is formed in the first body portion 1 .
- a second flow path 20 is formed in the second body portion 2 .
- a boundary flow path 30 is formed in the third body portion 3 .
- the boundary channel 30 continues to each of the first channel 10 and the second channel 20 .
- the coolant that has entered the first flow path 10 flows to the second flow path 20 via the boundary flow path 30 .
- the coolant ejection port 6 is provided on the ejection surface 27 of the second body portion 2 .
- FIG. 5 is a schematic cross-sectional view showing the first cross section S1 of the pressing member 100 according to the first embodiment.
- the first cross section S ⁇ b>1 intersects each of the first channel 10 , the boundary channel 30 and the second channel 20 .
- the first flow path 10 continues to the coolant inlet 5 .
- the first flow path 10 extends along the first direction D1.
- the second flow path 20 continues to the coolant ejection port 6 .
- the second flow path 20 extends along the second direction D2.
- the second direction D2 is inclined with respect to the first direction D1.
- the angle formed by the straight line along the first direction D1 and the straight line along the second direction D2 may be, for example, 60° or more and 120° or less.
- the boundary flow path 30 is composed of a pair of boundary wall surfaces 33 facing each other.
- the pair of boundary wall surfaces 33 has a first boundary wall surface 31 and a second boundary wall surface 32 .
- the second boundary wall surface 32 may be positioned between the first boundary wall surface 31 and the bottom surface 9 .
- the first boundary wall surface 31 is smoothly curved. From another point of view, the inclination of the tangent line L to the first boundary wall surface 31 changes continuously.
- the first boundary wall surface 31 is curved so as to protrude outward.
- the second boundary wall surface 32 may be bent. From another point of view, the inclination of the tangent to the first boundary wall surface 31 may change discontinuously.
- the second flow path 20 is composed of a third side surface 23 and a fourth side surface 24.
- the third side surface 23 and the fourth side surface 24 face each other.
- the third side surface 23 has a first wall surface 21 and a fifth wall surface 25 .
- the fifth wall surface 25 is a region on the third side surface 23 from a position 1 mm away from the coolant ejection port 6 to the coolant ejection port 6 .
- the first wall surface 21 is a region on the third side surface 23 that is 1 mm or more away from the coolant ejection port 6 .
- the first wall surface 21 continues to the fifth wall surface 25 .
- a distance B from the coolant ejection port 6 to the boundary between the first wall surface 21 and the fifth wall surface 25 is 1 mm.
- a step may be provided on the fifth wall surface 25 .
- the fourth side surface 24 has a second wall surface 22 and a sixth wall surface 26.
- the sixth wall surface 26 is a region on the fourth side surface 24 from a position 1 mm away from the coolant ejection port 6 to the coolant ejection port 6 .
- the second wall surface 22 is a region on the fourth side surface 24 that is separated from the coolant ejection port 6 by 1 mm or more.
- the second wall surface 22 continues to the sixth wall surface 26 .
- a distance B from the coolant ejection port 6 to the boundary between the second wall surface 22 and the sixth wall surface 26 is 1 mm.
- a step may be provided on the sixth wall surface 26 .
- the first wall surface 21 may be parallel to the second wall surface 22 .
- the ejection surface 27 on which the coolant ejection port 6 is formed may continue to the cylindrical portion 4 in the first cross section S1.
- the ejection surface 27 may be parallel to the central axis A of the cylindrical portion 4 .
- the ejection surface 27 may be provided along the outer peripheral surface of the cylindrical portion 4 .
- the central axis A of the cylindrical portion 4 may intersect the second direction D2.
- the coolant is ejected from the coolant ejection port 6 at a divergence angle ⁇ .
- the third side surface 23 continues to the first boundary wall surface 31 .
- the fourth side surface 24 continues to the second boundary wall surface 32 .
- the first flow path 10 is composed of a seventh side surface 17 and an eighth side surface 18 facing each other.
- the seventh side surface 17 continues to the first boundary wall surface 31 .
- the eighth side surface 18 continues to the second boundary wall surface 32 .
- the seventh side surface 17 is inclined with respect to the first wall surface 21 in the first cross section S1.
- the eighth side surface 18 is inclined with respect to the second wall surface 22 in the first cross section S1.
- FIG. 6 is a schematic cross-sectional view showing the configuration of the first main body 1 in a second cross section S2 perpendicular to the first direction D1.
- the cross section shown in FIG. 6 corresponds to the cross section along line VI-VI in FIG.
- the first flow path 10 formed in the first body portion 1 has an elongated shape.
- the lateral width (first width W1) of the first flow path 10 is greater than the vertical width (second width W2) of the first flow path 10.
- the direction in which the pair of boundary wall surfaces 33 face each other is the vertical direction.
- the direction in which the pair of boundary wall surfaces 33 face each other is a direction parallel to the direction from the seventh side surface 17 to the eighth side surface 18 .
- the direction perpendicular to the vertical direction is the horizontal direction.
- the first width W1 may be, for example, 1.5 to 4 times the second width W2.
- the lower limit of the first width W1 is not particularly limited, but may be, for example, 1.7 times or more the second width W2, or may be 2 times or more.
- the upper limit of the first width W1 is not particularly limited, but may be, for example, 3.8 times or less the second width W2, or may be 3.5 times or less.
- FIG. 7 is a schematic cross-sectional view showing the configuration of the second main body 2 in a second cross section S2 perpendicular to the second direction D2.
- the cross section shown in FIG. 7 corresponds to the cross section along line VII--VII in FIG.
- the second flow path 20 formed in the second body portion 2 is , has an elongated shape.
- the lateral width (third width W3) of the second flow path 20 is greater than the vertical width (fourth width W4) of the second flow path 20.
- the direction in which the pair of boundary wall surfaces 33 face each other is the vertical direction.
- the direction in which the pair of boundary wall surfaces 33 face each other is a direction parallel to the direction from the third side surface 23 to the fourth side surface 24 .
- the direction perpendicular to the vertical direction is the horizontal direction.
- the third width W3 may be smaller than the first width W1.
- the fourth width W4 may be smaller than the second width W2.
- the third width W3 may be, for example, 1.5 to 4.0 times the fourth width W4.
- the upper limit of the third width W3 is not particularly limited, but may be, for example, 3.0 times or less than the fourth width W4, or may be 2.5 times or less.
- FIG. 8 is a schematic cross-sectional view showing the third cross section S3 of the pressing member 100 according to the first embodiment.
- the cross section shown in FIG. 8 corresponds to the cross section along line VIII-VIII in FIG.
- the third cross section S ⁇ b>3 is parallel to each of the first direction D ⁇ b>1 and the lateral direction of the first flow path 10 .
- the first flow path 10 has a constricted portion 41 and a constant width portion 42 .
- the width of the first flow path 10 monotonically decreases toward the second flow path 20 .
- the diaphragm portion 41 is composed of the first side surface 11 and the second side surface 12 .
- the first side surface 11 and the second side surface 12 face each other.
- the first side 11 may be straight and the second side 12 may be curved.
- the constant width portion 42 the width of the first channel 10 hardly changes toward the second channel 20 .
- the constant width portion 42 is composed of the fifth side surface 15 and the sixth side surface 16. As shown in FIG.
- the fifth side surface 15 and the sixth side surface 16 face each other.
- Each of the fifth side surface 15 and the sixth side surface 16 is linear.
- the constant width portion 42 may be surrounded by an annular groove 95, as shown in FIG.
- the fifth side surface 15 continues to the first side surface 11 .
- the sixth side surface 16 continues to the second side surface 12 .
- the width of the coolant inlet 5 (seventh width W7) may be larger than the width of the constant width portion 42 (sixth width W6).
- the width of the constant width portion 42 (sixth width W6) may be larger than the width of the constricted portion 41 (fifth width W5).
- the fifth width W5 becomes smaller as the distance from the coolant inlet 5 increases.
- the cutting tool 200 according to the second embodiment differs from the cutting tool 200 according to the first embodiment mainly in that the length of the second main body portion 2 is long. It is the same as the cutting tool 200 which concerns on a form.
- the configuration different from that of the cutting tool 200 according to the first embodiment will be mainly described.
- FIG. 9 is a schematic perspective view showing the configuration of a cutting tool 200 according to the second embodiment.
- the cutting tool 200 according to the first embodiment mainly has a holder 50, a cutting insert 70, a pressing member 100, a sole plate 80, and a fastening member 60.
- the cutting insert 70 has a top surface 71 , an outer peripheral surface 72 and a cutting edge 73 .
- top surface 71 When viewed in a direction perpendicular to top surface 71, top surface 71 has a substantially rhomboidal profile.
- the angle of the top surface 71 at the corner portion of the cutting edge 73 of the cutting tool 200 according to the second embodiment is smaller than the angle of the top surface 71 at the corner portion of the cutting edge 73 of the cutting tool 200 according to the first embodiment.
- FIG. 10 is a schematic perspective view showing the configuration of the holder 50 of the cutting tool 200 according to the second embodiment.
- the insert holding portion 52 of the holder 50 of the cutting tool 200 according to the second embodiment has an upper surface 54, a first end surface 53 and a second end surface 55.
- the upper surface 54 continues to each of the first end surface 53 and the second end surface 55 .
- the first end surface 53 continues to the second end surface 55 .
- a second recess 92 , a third recess 93 , and a fourth recess 94 are formed in the insert holding portion 52 .
- a cutting insert 70 and a floor plate 80 are arranged in the second recess 92 .
- the second recessed portion 92 is exposed on each of the first end surface 53 , the second end surface 55 and the upper surface 54 .
- the third recessed portion 93 is provided on the upper surface 54 .
- a portion of the fastening member 60 is arranged in the third recess 93 .
- the second recess 92 and the third recess 93 may be continuous.
- FIG. 11 is a schematic perspective view showing the configuration of the pressing member 100 according to the second embodiment.
- FIG. 12 is a schematic plan view showing the configuration of the pressing member 100 according to the second embodiment.
- the pressing member 100 according to the second embodiment includes a first main body portion 1, a second main body portion 2, a third main body portion 3, a cylindrical portion 4, and a bottom surface 9. It mainly has A coolant inlet 5 is formed in the first body portion 1 .
- a coolant ejection port 6 is formed in the second body portion 2 .
- the third body portion 3 is positioned between the first body portion 1 and the second body portion 2 .
- FIG. 13 is a schematic cross-sectional view showing the first cross section S1 of the pressing member 100 according to the second embodiment.
- the first cross section S ⁇ b>1 intersects each of the first channel 10 , the boundary channel 30 and the second channel 20 .
- the first flow path 10 continues to the coolant inlet 5 .
- the first flow path 10 extends along the first direction D1.
- the second flow path 20 continues to the coolant ejection port 6 .
- the second flow path 20 extends along the second direction D2.
- the second direction D2 is inclined with respect to the first direction D1.
- the length of the second body portion 2 of the pressing member 100 according to the second embodiment is longer than the length of the second body portion 2 of the pressing member 100 according to the first embodiment.
- the length of the second flow path 20 of the pressing member 100 according to the second embodiment is longer than the length of the second flow path 20 of the pressing member 100 according to the first embodiment.
- FIG. 14 is a schematic cross-sectional view showing the third cross section S3 of the pressing member 100 according to the second embodiment.
- the cross section shown in FIG. 14 corresponds to the cross section along line XIV-XIV in FIG.
- the third cross section S ⁇ b>3 is parallel to each of the first direction D ⁇ b>1 and the lateral direction of the first flow path 10 .
- the first flow path 10 has a constricted portion 41 and a constant width portion 42 .
- the width of the first flow path 10 monotonically decreases toward the second flow path 20 .
- the diaphragm portion 41 is composed of the first side surface 11 and the second side surface 12 .
- the first side surface 11 and the second side surface 12 face each other.
- Each of the first side surface 11 and the second side surface 12 is linear.
- Each of the first side surface 11 and the second side surface 12 may be inclined with respect to the first direction D1.
- the direction of inclination of the first side surface 11 with respect to the first direction D1 may be opposite to the direction of inclination of the second side surface 12 with respect to the first direction D1.
- the cutting tool 200 according to the third embodiment differs from the cutting tool 200 according to the second embodiment mainly in that each of the first boundary wall surface 31 and the second boundary wall surface 32 is smoothly curved. , and other configurations are the same as those of the cutting tool 200 according to the second embodiment.
- the configuration different from that of the cutting tool 200 according to the second embodiment will be mainly described.
- FIG. 15 is a schematic cross-sectional view showing the first cross section S1 of the pressing member 100 according to the third embodiment.
- the first cross section S ⁇ b>1 intersects each of the first channel 10 , the boundary channel 30 and the second channel 20 .
- the first flow path 10 continues to the coolant inlet 5 .
- the first flow path 10 extends along the first direction D1.
- the second flow path 20 continues to the coolant ejection port 6 .
- the second flow path 20 extends along the second direction D2.
- the second direction D2 is inclined with respect to the first direction D1.
- the pair of boundary wall surfaces 33 has a first boundary wall surface 31 and a second boundary wall surface 32 in the first cross section S1.
- the second boundary wall surface 32 may be positioned between the first boundary wall surface 31 and the bottom surface 9 .
- at least one of the pair of boundary wall surfaces 33 has a tangent slope that changes continuously. Specifically, each of the first boundary wall surface 31 and the second boundary wall surface 32 is smoothly curved. From another point of view, each of the inclination of the tangent to the first boundary wall surface 31 and the inclination of the tangent to the second boundary wall surface 32 continuously changes.
- the first boundary wall surface 31 is curved so as to protrude outward.
- the second boundary wall surface 32 is curved so as to protrude inward.
- the configuration of the pressing member 100 according to the present disclosure is as follows. is not limited to In the pressing member 100 according to the present disclosure, the inclination of the tangent line to the first boundary wall surface 31 may change continuously and the inclination of the tangent line to the second boundary wall surface 32 may change discontinuously. The slope of the tangent to the boundary wall surface 31 may change discontinuously and the slope of the tangent to the second boundary wall surface 32 may change continuously.
- a pressing member 100 for fixing the cutting insert 70 to the holder 50 has a first main body portion 1, a second main body portion 2, and a third main body portion 3.
- a coolant inlet 5 is formed in the first body portion 1 .
- a coolant ejection port 6 is formed in the second body portion 2 .
- the third body portion 3 is positioned between the first body portion 1 and the second body portion 2 .
- a first flow path 10 is formed in the first body portion 1 .
- a second flow path 20 is formed in the second body portion 2 .
- a boundary channel 30 is formed in the third body portion 3 so as to communicate with each of the first channel 10 and the second channel 20 .
- the boundary flow paths 30 face each other in the first cross section S1 intersecting each of the first flow path 10, the boundary flow path 30 and the second flow path 20. It is composed of a pair of boundary wall surfaces 33 that are aligned with each other. In at least one of the pair of boundary wall surfaces 33, the inclination of the tangent to the boundary wall surface changes continuously. That is, at least one boundary wall surface of the pair of boundary wall surfaces 33 is smoothly curved. Therefore, the pressing member 100 and the cutting tool 200 according to the above embodiment can reduce fluid energy loss compared to the case where both of the pair of boundary wall surfaces 33 are not smoothly curved.
- the width of the first flow path 10 is greater than the vertical width of the first flow path 10
- the width of the second flow path 20 is greater than that of the second flow path. Greater than 20 vertical width.
- the first flow path 10 has the constricted portion 41 in which the width of the first flow path 10 monotonously decreases toward the second flow path 20.
- the energy of the fluid introduced into the channel is the same, the velocity of the fluid in the region of the small cross-sectional area of the channel will be higher than the speed of the fluid in the region of the large cross-sectional area of the channel. Since the first flow path 10 has the constricted portion 41 in which the width of the first flow path 10 monotonously decreases toward the second flow path 20, the energy loss of the fluid can be reduced while the first flow path The velocity of the fluid can be increased from 10 toward the second flow path 20 .
- the pressing member 100 may further have the cylindrical portion 4 projecting from the second body portion 2 .
- the ejection surface 27 on which the coolant ejection port 6 is formed may be parallel to the central axis A of the cylindrical portion 4 in the first cross section S1.
- the ejection surface 27 on which the coolant ejection port 6 is formed is parallel to the central axis A of the cylindrical portion 4, the ejection surface 27 on which the coolant ejection port 6 is formed is aligned with the central axis A of the cylindrical portion 4.
- the divergence angle of the coolant ejected from the coolant ejection port 6 can be made smaller than when it is inclined.
- the second flow path 20 may be configured by the third side surface 23 and the fourth side surface 24 facing each other in the first cross section S1.
- the third side surface 23 may have the first wall surface 21 separated from the coolant jet 6 by 1 mm or more.
- the fourth side surface 24 may have a second wall surface 22 that is 1 mm or more away from the coolant jet 6 .
- the first wall surface 21 may be parallel to the second wall surface 22 .
- the fluid tend to flow along directions parallel to each of the Therefore, the divergence angle of the coolant ejected from the coolant ejection port 6 can be reduced. Therefore, the coolant can be discharged intensively to the cutting edge 73 of the cutting insert 70 .
- FIG. 16 is a schematic cross-sectional view showing the configuration of the pressing member 100 according to Sample 1.
- the boundary channel 30 is composed of a first boundary wall surface 31 and a second boundary wall surface 32 .
- Each of the first boundary wall surface 31 and the second boundary wall surface 32 is angular. That is, in each of the first boundary wall surface 31 and the second boundary wall surface 32, the inclination of the tangent to the boundary wall surface changes discontinuously.
- the pressing member 100 according to sample 2 is an example.
- the structure of the pressing member 100 according to sample 2 is shown in FIG.
- the boundary flow channel 30 in the first cross section S1 intersecting with each of the first flow channel 10, the boundary flow channel 30 and the second flow channel 20, the boundary flow channel 30 has the first boundary wall surface 31 and the second flow channel 20. It is composed of two boundary wall surfaces 32 .
- Each of the first boundary wall surface 31 and the second boundary wall surface 32 is smoothly curved. That is, in each of the first boundary wall surface 31 and the second boundary wall surface 32, the inclination of the tangent to the boundary wall surface continuously changes.
- Table 1 shows the half apex angle and solid angle of the coolant ejected from the coolant ejection port 6 of each of the pressing member 100 according to sample 1 and the pressing member 100 according to sample 2.
- the half apex angle and solid angle of the coolant ejected from the coolant ejection port 6 of the pressing member 100 according to sample 1 were 10° and 0.03 steradian, respectively.
- the half apex angle and solid angle of the coolant ejected from the coolant ejection port 6 of the pressing member 100 according to Sample 2 were 2° and 0.01 steradian, respectively. It was confirmed that the pressing member 100 according to sample 2 can reduce the divergence angle of the coolant as compared with the pressing member 100 according to sample 1 .
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- Engineering & Computer Science (AREA)
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- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
Description
本開示の目的は、流体のエネルギー損失を低減することができる押さえ部材および切削工具を提供することである。
本開示によれば、流体のエネルギー損失を低減することができる押さえ部材および切削工具を提供することができる。
まず、本開示の実施形態を、列挙して説明する。
次に、本開示の実施形態の詳細を、図面を参照しながら説明する。以下の図面においては、同一又は相当する部分に同一の参照符号を付し、重複する説明は繰り返さない。
まず、本開示の第1実施形態に係る切削工具200の構成について説明する。
次に、本開示の第2実施形態に係る切削工具200の構成について説明する。第2実施形態に係る切削工具200は、主に、第2本体部2の長さが長い点において、第1実施形態に係る切削工具200と異なっており、その他の構成については、第1実施形態に係る切削工具200と同様である。以下、第1実施形態に係る切削工具200と異なる構成を中心に説明する。
次に、本開示の第3実施形態に係る切削工具200の構成について説明する。第3実施形態に係る切削工具200は、主に、第1境界壁面31および第2境界壁面32の各々が滑らかに湾曲している点において、第2実施形態に係る切削工具200と異なっており、その他の構成については、第2実施形態に係る切削工具200と同様である。以下、第2実施形態に係る切削工具200と異なる構成を中心に説明する。
まず、サンプル1に係る押さえ部材100およびサンプル2に係る押さえ部材100を準備した。サンプル1に係る押さえ部材100は、比較例である。図16は、サンプル1に係る押さえ部材100の構成を示す断面模式図である。図16に示されるように、サンプル1に係る押さえ部材100によれば、第1流路10、境界流路30および第2流路20の各々に交差する第1断面S1において、境界流路30は第1境界壁面31および第2境界壁面32により構成されている。第1境界壁面31および第2境界壁面32の各々は、角張っている。つまり、第1境界壁面31および第2境界壁面32の各々において、境界壁面の接線の傾きは、非連続的に変化している。
次に、サンプル1に係る押さえ部材100およびサンプル2に係る押さえ部材100の各々のクーラント流入口5にクーラントを導入し、クーラント噴出口6から噴出されるクーラントの発散角θを測定した。発散角θは、クーラントが発散している状況を、第1断面S1に垂直な方向から写真撮影することにより測定した。クーラントの発散角θの半分の値は、半頂角とした。クーラントの発散が理想的な円錐状となっていると仮定して、クーラントの半頂角に基づいてクーラントの立体角を算出した。
Claims (9)
- 切削インサートをホルダに固定するための押さえ部材であって、
クーラント流入口が形成された第1本体部と、
クーラント噴出口が形成された第2本体部と、
前記第1本体部と前記第2本体部との間に位置する第3本体部とを備え、
前記第1本体部には、前記クーラント流入口に連なり、第1方向に沿って延びる第1流路が形成されており、
前記第2本体部には、前記クーラント噴出口に連なり、前記第1方向に対して傾斜する第2方向に沿って延びる第2流路が形成されており、
前記第3本体部には、前記第1流路および前記第2流路の各々に連なる境界流路が形成されており、
前記第1流路、前記境界流路および前記第2流路の各々に交差する第1断面において、前記境界流路は互いに対向する一対の境界壁面により構成されており、
前記一対の境界壁面の少なくとも一方において、前記境界壁面の接線の傾きは、連続的に変化し、
クーラントが流れる方向に対して垂直な第2断面において、前記一対の境界壁面が向かい合う方向を縦方向とし、前記縦方向に垂直な方向を横方向とすると、前記第1流路の横幅は前記第1流路の縦幅よりも大きく、かつ、前記第2流路の横幅は前記第2流路の縦幅よりも大きい、押さえ部材。 - 前記第1流路は、前記第2流路に向かうに従って前記第1流路の横幅が単調に減少する絞り部分を有する、請求項1に記載の押さえ部材。
- 前記第1方向および前記横方向の各々に平行な第3断面において、前記絞り部分は、互いに対向する第1側面と第2側面とにより構成されており、
前記第1側面は直線状であり、かつ前記第2側面は湾曲状である、請求項2に記載の押さえ部材。 - 前記第1方向および前記横方向の各々に平行な第3断面において、前記絞り部分は、互いに対向する第1側面と第2側面とにより構成されており、
前記第1側面および前記第2側面の各々は、直線状であり、
前記第1側面および前記第2側面の各々は、前記第1方向に対して傾斜している、請求項2に記載の押さえ部材。 - 前記押さえ部材は、前記第2本体部から突出する円柱部をさらに備え、
前記第1断面において、前記クーラント噴出口が形成されている噴出面は、前記円柱部の中心軸と平行である、請求項1から請求項4のいずれか1項に記載の押さえ部材。 - 前記第1断面において、前記第2流路は、互いに対向する第3側面と第4側面とにより構成されており、
前記第3側面は、前記クーラント噴出口から1mm以上離れた第1壁面を有し、
前記第4側面は、前記クーラント噴出口から1mm以上離れた第2壁面を有し、
前記第1壁面は、前記第2壁面と平行である、請求項1から請求項5のいずれか1項に記載の押さえ部材。 - 前記第1流路は、前記第2流路に向かうに従って前記第1流路の横幅が単調に減少する絞り部分を有し、
前記押さえ部材は、前記第2本体部から突出する円柱部をさらに備え、
前記第1断面において、前記クーラント噴出口が形成されている噴出面は、前記円柱部の中心軸と平行であり、
前記第1断面において、前記第2流路は、互いに対向する第3側面と第4側面とにより構成されており、
前記第3側面は、前記クーラント噴出口から1mm以上離れた第1壁面を有し、
前記第4側面は、前記クーラント噴出口から1mm以上離れた第2壁面を有し、
前記第1壁面は、前記第2壁面と平行である、請求項1に記載の押さえ部材。 - 請求項1から請求項7のいずれか1項に記載の押さえ部材と、
前記押さえ部材が配置される前記ホルダとを備える、切削工具。 - 前記押さえ部材に接する前記切削インサートをさらに備える、請求項8に記載の切削工具。
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JP2021572931A JP7069514B1 (ja) | 2021-03-02 | 2021-03-02 | 押さえ部材および切削工具 |
PCT/JP2021/007821 WO2022185396A1 (ja) | 2021-03-02 | 2021-03-02 | 押さえ部材および切削工具 |
CN202180085237.2A CN116600920A (zh) | 2021-03-02 | 2021-03-02 | 按压部件及切削刀具 |
US17/639,907 US20230158579A1 (en) | 2021-03-02 | 2021-03-02 | Retaining member and cutting tool |
EP21928974.1A EP4302908A4 (en) | 2021-03-02 | 2021-03-02 | HOLDING ELEMENT AND CUTTING TOOL |
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