Pressing components and cutting tools

Abstract

A first flow path extending in a first direction and connected to a coolant inlet is formed in the first main body. A second flow path extending in a second direction inclined relative to the first direction and connected to a coolant outlet is formed in the second main body. A boundary flow path connected to both the first and second flow paths is formed in the third main body. In a first cross-section intersecting the first, boundary, and second flow paths, the boundary flow paths are formed by a pair of opposing boundary walls. In at least one of the pair of boundary walls, the slope of the tangent changes continuously. In a second cross-section perpendicular to the coolant flow direction, if the direction opposite the pair of boundary walls is defined as longitudinal and the direction perpendicular to the longitudinal direction is defined as transverse, then the transverse width of the first flow path is greater than its longitudinal width, and the transverse width of the second flow path is greater than its longitudinal width.

Description

Technical Field

[0001] This invention relates to pressing components and cutting tools. Background Technology

[0002] International Patent Publication No. 2019 / 021605 (Patent Document 1) discloses a cutting tool holder for supporting cutting inserts. This cutting tool holder has a pressing member for positioning and fixing the cutting inserts to the holder body.

[0003] Patent Document 1: International Publication No. 2019 / 021605 Summary of the Invention

[0004] The pressing member of the present invention is used to fix a cutting blade to a holder and has a first main body, a second main body, and a third main body. A coolant inlet is formed in the first main body. A coolant outlet is formed in the second main body. The third main body is located between the first and second main bodies. A first flow path is formed in the first main body, connecting to the coolant inlet and extending in a first direction. A second flow path is formed in the second main body, connecting to the coolant outlet and extending in a second direction inclined relative to the first direction. A boundary flow path is formed in the third main body, connecting to both the first and second flow paths. In a first cross-section intersecting each of the first, boundary, and second flow paths, the boundary flow path is formed by a pair of opposing boundary walls. In at least one of the pair of boundary walls, the slope of the tangent changes continuously. In the second cross section perpendicular to the direction of coolant flow, if the direction opposite to a pair of boundary walls is defined as longitudinal and the direction perpendicular to longitudinal is defined as transverse, then the transverse width of the first flow path is greater than the longitudinal width of the first flow path, and the transverse width of the second flow path is greater than the longitudinal width of the second flow path. Attached Figure Description

[0005] Figure 1 This is a perspective view showing the structure of the cutting tool according to the first embodiment.

[0006] Figure 2 This is a perspective view showing the structure of the holder of the cutting tool according to the first embodiment.

[0007] Figure 3 This is a perspective view showing the structure of the pressing member according to the first embodiment.

[0008] Figure 4 This is a top view schematic diagram showing the structure of the pressing member according to the first embodiment.

[0009] Figure 5 This is a cross-sectional schematic diagram showing the first cross-section of the pressing member according to the first embodiment.

[0010] Figure 6 This is a cross-sectional schematic diagram showing the structure of the first main body part, which is perpendicular to the second section relative to the first direction.

[0011] Figure 7 This is a cross-sectional schematic diagram showing the structure of the second main body part, which is perpendicular to the second direction.

[0012] Figure 8 This is a cross-sectional schematic diagram showing the third section of the pressing member according to the first embodiment.

[0013] Figure 9 This is a perspective view showing the structure of the cutting tool according to the second embodiment.

[0014] Figure 10 This is a perspective view showing the structure of the holder for the cutting tool according to the second embodiment.

[0015] Figure 11 This is a perspective view showing the structure of the pressing member according to the second embodiment.

[0016] Figure 12 This is a top view schematic diagram showing the structure of the pressing member according to the second embodiment.

[0017] Figure 13 This is a cross-sectional schematic diagram showing the first cross-section of the pressing member according to the second embodiment.

[0018] Figure 14 This is a cross-sectional schematic diagram showing the third cross-section of the pressing member according to the second embodiment.

[0019] Figure 15 This is a cross-sectional schematic diagram showing the first cross-section of the pressing member according to the third embodiment.

[0020] Figure 16 This is a cross-sectional schematic diagram showing the structure of the pressing component involved in Sample 1. Detailed Implementation

[0021] [The problem to be solved by this invention]

[0022] The purpose of this invention is to provide a pressing component and a cutting tool that can reduce the energy loss of fluids.

[0023] [Effects of the Invention]

[0024] According to the present invention, a pressing component and a cutting tool capable of reducing energy loss of fluid can be provided.

[0025] [Description of embodiments of the present invention]

[0026] First, embodiments of the present invention will be described.

[0027] (1) The pressing member 100 of the present invention is used to fix the cutting blade 70 to the retainer 50. The pressing member 100 has a first main body 1, a second main body 2, and a third main body 3. A coolant inlet 5 is formed in the first main body 1. A coolant outlet 6 is formed in the second main body 2. The third main body 3 is located between the first main body 1 and the second main body 2. A first flow path 10 is formed in the first main body 1, which is connected to the coolant inlet 5 and extends along a first direction D1. A second flow path 20 is formed in the second main body 2, which is connected to the coolant outlet 6 and extends along a second direction D2 that is inclined relative to the first direction D1. A boundary flow path 30 is formed in the third main body 3, which is connected to the first flow path 10 and the second flow path 20 respectively. In a first cross section S1 that intersects the first flow path 10, the boundary flow path 30, and the second flow path 20 respectively, the boundary flow path 30 is composed of a pair of opposing boundary walls 33. In at least one of the pair of boundary walls 33, the slope of the tangent of the boundary wall changes continuously. In the second section S2 perpendicular to the direction of coolant flow, if the direction opposite to the pair of boundary walls 33 is defined as longitudinal and the direction perpendicular to the longitudinal direction is defined as transverse, then the transverse width of the first flow path 10 is greater than the longitudinal width of the first flow path 10, and the transverse width of the second flow path 20 is greater than the longitudinal width of the second flow path 20.

[0028] (2) According to the pressing member 100 mentioned in (1) above, the first flow path 10 may have a necked portion 41 that monotonically decreases in lateral width as it moves toward the second flow path 20.

[0029] (3) According to the pressing member 100 mentioned in (2) above, the necking portion 41 may be composed of a first side surface 11 and a second side surface 12 that are opposite to each other in a third cross section S3 that is parallel to the first direction D1 and the transverse direction. The first side surface 11 may be straight and the second side surface 12 may be curved.

[0030] (4) According to the pressing member 100 mentioned in (2) above, the necking portion 41 may be composed of a first side surface 11 and a second side surface 12 that are opposite to each other in a third cross section S3 that is parallel to both the first direction D1 and the transverse direction. The first side surface 11 and the second side surface 12 may each be straight. The first side surface 11 and the second side surface 12 may each be inclined relative to the first direction D1.

[0031] (5) According to any one of (1) to (4) above, the pressing member 100 may further have a cylindrical portion 4 protruding from the second main body portion 2. In the first cross section S1, the spray surface on which the coolant spray outlet 6 is formed may be parallel to the central axis A of the cylindrical portion 4.

[0032] (6) According to any one of (1) to (5) above, the pressing member 100 may, in the first cross section S1, be composed of a third side surface 23 and a fourth side surface 24 opposite to each other. The third side surface 23 may have a first wall surface 21 that is more than 1 mm away from the coolant spray outlet 6. The fourth side surface 24 may have a second wall surface 22 that is more than 1 mm away from the coolant spray outlet 6. The first wall surface 21 may be parallel to the second wall surface 22.

[0033] (7) According to the pressing member 100 mentioned in (1) above, the first flow path 10 may have a necked portion 41 whose lateral width decreases monotonically as it moves toward the second flow path 20. The pressing member 100 may also have a cylindrical portion 4 protruding from the second main body portion 2. In the first cross section S1, the ejection surface where the coolant nozzle 6 is formed may be parallel to the central axis A of the cylindrical portion 4. In the first cross section S1, the second flow path 20 may be composed of a third side surface 23 and a fourth side surface 24 that are opposite to each other. The third side surface 23 may have a first wall surface 21 that is more than 1 mm away from the coolant nozzle 6. The fourth side surface 24 may have a second wall surface 22 that is more than 1 mm away from the coolant nozzle 6. The first wall surface 21 may be parallel to the second wall surface 22.

[0034] (8) The cutting tool 200 of the present invention has a pressing member 100 as described in any one of (1) to (7) above and a retainer 50 for which the pressing member 100 is disposed.

[0035] (9) The cutting tool 200 described in (8) above may also have a cutting insert 70 that is connected to the pressing member 100.

[0036] [Detailed Description of Embodiments of the Invention]

[0037] Next, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following drawings, the same or equivalent parts are labeled with the same reference numerals, and the description will not be repeated.

[0038] (First Embodiment)

[0039] First, the structure of the cutting tool 200 according to the first embodiment of the present invention will be described.

[0040] Figure 1 This is a perspective view showing the structure of the cutting tool 200 according to the first embodiment. Figure 1As shown, the cutting tool 200 according to the first embodiment mainly includes a retainer 50, a cutting insert 70, a pressing member 100, a backing plate 80, and a fastening member 60. The retainer 50 has an insert holding portion 52 and a support portion 51. The insert holding portion 52 is connected to the support portion 51. The cutting insert 70, the backing plate 80, the pressing member 100, and the fastening member 60 are arranged in the insert holding portion 52. The support portion 51 is mounted, for example, on a machine tool.

[0041] The cutting insert 70 has a top surface 71, an outer peripheral surface 72, and a cutting edge 73. At least a portion of the top surface 71 functions as a forward-curving surface. At least a portion of the outer peripheral surface 72 functions as a clearance surface. The edges of the top surface 71 and the outer peripheral surface 72 form the cutting edge 73. When viewed from a direction perpendicular to the top surface 71, the top surface 71 is substantially parallelogram-shaped. A hole 74 is formed in the top surface 71. The cutting insert 70 is in contact with a pressing member 100. The pressing member 100 covers a portion of the top surface 71 of the cutting insert 70. The pressing member 100 secures the cutting insert 70 to a retainer 50. The pressing member 100 positions the cutting insert 70. The pressing member 100 is secured to the retainer 50 by a fastening member 60. The cutting insert 70 is in contact with a backing plate 80. The backing plate 80 is located between the cutting insert 70 and the retainer 50. The backing plate 80 is in contact with the retainer 50.

[0042] The pressing member 100 has a coolant spray outlet 6. The coolant spray outlet 6 faces the corner portion of the cutting edge 73 of the cutting blade 70. A coolant injection port 91 is provided in the blade holding portion 52 of the holder 50. The coolant injection port 91 faces the corner portion of the cutting edge 73 of the cutting blade 70. The coolant sprayed from the coolant spray outlet 6 is sprayed from the top surface 71 side (upper side) of the cutting blade 70 toward the cutting edge 73. The coolant sprayed from the coolant injection port 91 is sprayed from the outer peripheral surface 72 side (lower side) of the cutting blade 70 toward the cutting edge 73.

[0043] Figure 2 This is a perspective view showing the structure of the holder 50 of the cutting tool 200 according to the first embodiment. Figure 2 As shown, the cutting tool holder 52 of the holder 50 of the cutting tool 200 according to the first embodiment has an upper surface 54, a first end face 53, and a second end face 55. The upper surface 54 is connected to both the first end face 53 and the second end face 55. The first end face 53 is connected to the second end face 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.

[0044] A second recess 92, a third recess 93, and a fourth recess 94 are formed in the blade holder 52. The cutting blade 70 and the backing plate 80 are disposed in the second recess 92. The second recess 92 is exposed on the first end face 53, the second end face 55, and the upper surface 54, respectively. The third recess 93 is disposed on the upper surface 54. A portion of the fastening member 60 is disposed in the third recess 93. The fourth recess 94 is disposed on the upper surface 54. A portion of the pressing member 100 is disposed in the fourth recess 94.

[0045] Next, the structure of the pressing member 100 according to the first embodiment of the present invention will be described. Figure 3 This is a perspective view showing the structure of the pressing member 100 according to the first embodiment. Figure 4 This is a top view schematic diagram showing the structure of the pressing member 100 according to the first embodiment.

[0046] like Figure 3 and Figure 4 As shown, the pressing member 100 according to the first embodiment mainly includes a first main body 1, a second main body 2, a third main body 3, a cylindrical portion 4, and a bottom surface 9. A coolant inlet 5 is formed in the first main body 1. The coolant inlet 5 is the portion through which coolant is introduced into the pressing member 100. The coolant is introduced into the pressing member 100 from the fourth recess 94 of the retainer 50. A coolant outlet 6 is formed in the second main body 2. The coolant outlet 6 is the portion through which coolant is sprayed from the pressing member 100. The third main body 3 is located between the first main body 1 and the second main body 2.

[0047] 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 retainer 50 by the fastening member 60. The bottom surface 9 is arranged opposite to the top surface 71 of the cutting blade 70. A first recess 8 is provided in the bottom surface 9. The first main body 1 is provided to protrude from the bottom surface 9. The first main body 1 is a cylindrical member. An annular groove 95 is provided on the outer peripheral surface of the first main body 1. A cylindrical portion 4 protrudes from the second main body 2. The cylindrical portion 4 extends in a direction substantially perpendicular to the bottom surface 9. The cylindrical portion 4 is disposed in a hole 74 provided in the top surface 71 of the cutting blade 70.

[0048] like Figure 4 As shown, a first flow path 10 is formed in the first main body 1. A second flow path 20 is formed in the second main body 2. A boundary flow path 30 is formed in the third main body 3. The boundary flow path 30 is connected to both the first flow path 10 and the second flow path 20. Coolant entering the first flow path 10 flows to the second flow path 20 via the boundary flow path 30. A coolant nozzle 6 is provided on the nozzle surface 27 of the second main body 2.

[0049] Figure 5This is a cross-sectional schematic diagram showing the first cross-section S1 of the pressing member 100 according to the first embodiment. The first cross-section S1 intersects the first flow path 10, the boundary flow path 30, and the second flow path 20. Figure 5 As shown, the first flow path 10 is connected to the coolant inlet 5. The first flow path 10 extends along the first direction D1. The second flow path 20 is connected to the coolant outlet 6. The second flow path 20 extends along the second direction D2. The second direction D2 is inclined relative 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 can be, for example, 60° or more and 120° or less.

[0050] like Figure 5 As shown, in the first cross-section S1, the boundary flow path 30 is composed of a pair of boundary walls 33 facing each other. The pair of boundary walls 33 has a first boundary wall 31 and a second boundary wall 32. The second boundary wall 32 may be located between the first boundary wall 31 and the bottom surface 9. The first boundary wall 31 is smoothly curved. From another viewpoint, the slope of the tangent L of the first boundary wall 31 changes continuously. The first boundary wall 31 is curved in a convex outward manner. The second boundary wall 32 may be bent. From another viewpoint, the slope of the tangent of the first boundary wall 31 may change discontinuously.

[0051] In the first cross-section S1, the second flow path 20 is formed by a third side surface 23 and a fourth side surface 24. The third side surface 23 and the fourth side surface 24 are opposite to 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 on the third side surface 23, and extends from a position 1 mm away from the coolant nozzle 6 to the coolant nozzle 6. The first wall surface 21 is on the third side surface 23, and extends from the coolant nozzle 6 at a distance greater than 1 mm away. The first wall surface 21 is connected to the fifth wall surface 25. The distance B from the coolant nozzle 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.

[0052] The fourth side surface 24 has a second wall surface 22 and a sixth wall surface 26. The sixth wall surface 26 on the fourth side surface 24 is the area extending from a position 1 mm away from the coolant nozzle 6 to the coolant nozzle 6. The second wall surface 22 on the fourth side surface 24 is the area extending more than 1 mm away from the coolant nozzle 6. The second wall surface 22 is connected to the sixth wall surface 26. The distance B from the coolant nozzle 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.

[0053] like Figure 5As shown, in the first cross-section S1, the ejection surface 27, where the coolant nozzle 6 is formed, can be connected to the cylindrical portion 4. The ejection surface 27 can be parallel to the central axis A of the cylindrical portion 4. The ejection surface 27 can be provided along the outer peripheral surface of the cylindrical portion 4. The central axis A of the cylindrical portion 4 can intersect with the second direction D2. Coolant is ejected from the coolant nozzle 6 at a divergence angle θ.

[0054] The third side 23 is connected to the first boundary wall 31. The fourth side 24 is connected to the second boundary wall 32. In the first section S1, the first flow path 10 is formed by the seventh side 17 and the eighth side 18, which are opposite to each other. The seventh side 17 is connected to the first boundary wall 31. The eighth side 18 is connected to the second boundary wall 32. In the first section S1, the seventh side 17 is inclined relative to the first wall 21. In the first section S1, the eighth side 18 is inclined relative to the second wall 22.

[0055] Figure 6 This is a cross-sectional schematic diagram showing the structure of the first main body 1, which is perpendicular to the second section S2 relative to the first direction D1. Figure 6 The cross section shown is along Figure 5 The cross-section of line VI-VI corresponds to this. For example... Figure 6 As shown, in a second cross-section S2 perpendicular to the direction of coolant flow in the first flow path 10 (first direction D1), the first flow path 10 formed in the first main body 1 has an elongated shape. In the second cross-section S2, the lateral width (first width W1) of the first flow path 10 is greater than the longitudinal width (second width W2) of the first flow path 10. In the second cross-section S2 of the first main body 1, the direction in which the pair of boundary walls 33 face each other is longitudinal. In the first flow path 10, the direction in which the pair of boundary walls 33 face each other is parallel to the direction from the seventh side surface 17 toward the eighth side surface 18. In the second cross-section S2 of the first main body 1, the direction perpendicular to the longitudinal direction is lateral.

[0056] The first width W1 can be, for example, more than 1.5 times and less than 4 times the second width W2. The lower limit of the first width W1 is not particularly limited, for example, it can be more than 1.7 times or more than 2 times the second width W2. The upper limit of the first width W1 is not particularly limited, for example, it can be less than 3.8 times or less than 3.5 times the second width W2.

[0057] Figure 7 This is a cross-sectional schematic diagram showing the structure of the second main body 2, which is perpendicular to the second section S2 relative to the second direction D2. Figure 7 The cross section shown is along Figure 5 The cross-section of line VII-VII corresponds to that of line VII-VII. For example... Figure 7As shown, in a second cross-section S2 perpendicular to the direction of coolant flow in the second flow path 20 (second direction D2), the second flow path 20 formed in the second main body 2 has an elongated shape. In the second cross-section S2, the lateral width (third width W3) of the second flow path 20 is greater than the longitudinal width (fourth width W4) of the second flow path 20. In the second cross-section S2 of the second main body 2, the direction in which a pair of boundary walls 33 face each other is longitudinal. In the second flow path 20, the direction in which a pair of boundary walls 33 face each other is parallel to the direction from the third side 23 toward the fourth side 24. In the second cross-section S2 of the second main body 2, the direction perpendicular to the longitudinal direction is lateral. The third width W3 may be smaller than the first width W1. The fourth width W4 may be smaller than the second width W2.

[0058] The third width W3 can be, for example, more than 1.5 times and less than 4.0 times the fourth width W4. The upper limit of the third width W3 is not particularly limited, for example, it can be less than 3.0 times or less than 2.5 times the fourth width W4.

[0059] Figure 8 This is a cross-sectional schematic diagram showing the third section S3 of the pressing member 100 according to the first embodiment. Figure 8 The cross section shown is along Figure 5 The cross-sections of lines VIII-VIII correspond to each other. The third cross-section S3 is parallel to both the first direction D1 and the transverse direction of the first flow path 10. For example... Figure 8 As shown, the first flow path 10 has a necking portion 41 and a fixed-width portion 42. In the necking portion 41, the lateral width of the first flow path 10 decreases monotonically as it moves toward the second flow path 20. In the third cross-section S3, the necking portion 41 is formed by a first side surface 11 and a second side surface 12. The first side surface 11 and the second side surface 12 are opposite to each other. The first side surface 11 may be straight and the second side surface 12 may be curved. In the fixed-width portion 42, the lateral width of the first flow path 10 remains substantially unchanged as it moves toward the second flow path 20. In the third cross-section S3, the fixed-width portion 42 is formed by a fifth side surface 15 and a sixth side surface 16. The fifth side surface 15 and the sixth side surface 16 are opposite to each other. Both the fifth side surface 15 and the sixth side surface 16 are straight.

[0060] like Figure 8 As shown, the fixed-width portion 42 can be surrounded by the annular groove 95. The fifth side 15 is connected to the first side 11. The sixth side 16 is connected to the second side 12. In the third section S3, the lateral width of the coolant inlet 5 (the seventh width W7) can be greater than the lateral width of the fixed-width portion 42 (the sixth width W6). In the third section S3, the lateral width of the fixed-width portion 42 (the sixth width W6) can be greater than the lateral width of the necked-down portion 41 (the fifth width W5). In the third section S3, the fifth width W5 decreases as it moves away from the coolant inlet 5.

[0061] (Second Implementation)

[0062] Next, the structure of the cutting tool 200 according to the second embodiment of the present invention will be described. 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 longer; otherwise, the structure is the same as that of the cutting tool 200 according to the first embodiment. Hereinafter, the description will focus on the structure that differs from that of the cutting tool 200 according to the first embodiment.

[0063] Figure 9 This is a perspective view showing the structure of the cutting tool 200 according to the second embodiment. Figure 9 As shown, the cutting tool 200 according to the first embodiment mainly includes a retainer 50, a cutting insert 70, a pressing member 100, a backing 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. When viewed from a direction perpendicular to the top surface 71, the shape of the top surface 71 is substantially rhomboid. The angle of the top surface 71 at the corner 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 of the cutting edge 73 of the cutting tool 200 according to the first embodiment.

[0064] Figure 10 This is a perspective view showing the structure of the holder 50 of the cutting tool 200 according to the second embodiment. Figure 10 As shown, the cutting tool holder 50 of the cutting tool 200 according to the second embodiment has an upper surface 54, a first end face 53, and a second end face 55. The upper surface 54 is connected to both the first end face 53 and the second end face 55. The first end face 53 is connected to the second end face 55. A second recess 92, a third recess 93, and a fourth recess 94 are formed in the cutting tool holder 52. The cutting tool 70 and the backing plate 80 are disposed in the second recess 92. The second recess 92 is exposed on the first end face 53, the second end face 55, and the upper surface 54, respectively. The third recess 93 is provided on the upper surface 54. A portion of the fastening member 60 is disposed in the third recess 93. The second recess 92 and the third recess 93 can be connected.

[0065] Figure 11 This is a perspective view showing the structure of the pressing member 100 according to the second embodiment. Figure 12 This is a top view schematic diagram showing the structure of the pressing member 100 according to the second embodiment. (See attached diagram.) Figure 11 and Figure 12As shown, the pressing member 100 according to the second embodiment mainly includes a first main body 1, a second main body 2, a third main body 3, a cylindrical part 4, and a bottom surface 9. A coolant inlet 5 is formed in the first main body 1. A coolant outlet 6 is formed in the second main body 2. The third main body 3 is located between the first main body 1 and the second main body 2.

[0066] Figure 13 This is a cross-sectional schematic diagram showing the first cross-section S1 of the pressing member 100 according to the second embodiment. The first cross-section S1 intersects the first flow path 10, the boundary flow path 30, and the second flow path 20. Figure 13 As shown, the first flow path 10 is connected to the coolant inlet 5. The first flow path 10 extends along the first direction D1. The second flow path 20 is connected to the coolant outlet 6. The second flow path 20 extends along the second direction D2. The second direction D2 is inclined relative to the first direction D1. The length of the second main body 2 of the pressing member 100 according to the second embodiment is longer than the length of the second main body 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.

[0067] Figure 14 This is a cross-sectional schematic diagram showing the third section S3 of the pressing member 100 according to the second embodiment. Figure 14 The cross section shown is along Figure 13 The cross-section corresponds to line XIV-XIV. The third cross-section S3 is parallel to both the first direction D1 and the transverse direction of the first flow path 10. For example... Figure 14 As shown, the first flow path 10 has a necking portion 41 and a fixed-width portion 42. In the necking portion 41, the lateral width of the first flow path 10 decreases monotonically as it moves toward the second flow path 20. In the third cross-section S3, the necking portion 41 is formed by a first side surface 11 and a second side surface 12. The first side surface 11 and the second side surface 12 are opposite to each other. The first side surface 11 and the second side surface 12 are each straight. The first side surface 11 and the second side surface 12 can each be inclined relative to the first direction D1. In the third cross-section S3, the inclination direction of the first side surface 11 relative to the first direction D1 can be opposite to the inclination direction of the second side surface 12 relative to the first direction D1.

[0068] (Third Implementation)

[0069] Next, the structure of the cutting tool 200 according to the third embodiment of the present invention will be described. The cutting tool 200 according to the third embodiment differs from the cutting tool 200 according to the second embodiment mainly in that the first boundary wall 31 and the second boundary wall 32 are each smoothly curved; however, the other structural features are the same as those of the cutting tool 200 according to the second embodiment. The following description will focus on the structural differences from those of the cutting tool 200 according to the second embodiment.

[0070] Figure 15 This is a cross-sectional schematic diagram showing the first cross-section S1 of the pressing member 100 according to the third embodiment. The first cross-section S1 intersects the first flow path 10, the boundary flow path 30, and the second flow path 20. Figure 15 As shown, the first flow path 10 is connected to the coolant inlet 5. The first flow path 10 extends along the first direction D1. The second flow path 20 is connected to the coolant outlet 6. The second flow path 20 extends along the second direction D2. The second direction D2 is inclined relative to the first direction D1.

[0071] like Figure 15 As shown, in the first cross-section S1, a pair of boundary walls 33 have a first boundary wall 31 and a second boundary wall 32. The second boundary wall 32 may be located between the first boundary wall 31 and the bottom surface 9. According to the pressing member 100 of the third embodiment, the slope of the tangent of at least one of the pair of boundary walls 33 changes continuously. Specifically, the first boundary wall 31 and the second boundary wall 32 are each smoothly curved. From another viewpoint, the slope of the tangent of the first boundary wall 31 and the slope of the tangent of the second boundary wall 32 change continuously. The first boundary wall 31 is curved in a way that bulges outward. The second boundary wall 32 is curved in a way that bulges inward.

[0072] In the above description, the slopes of the tangents of the first boundary wall 31 and the second boundary wall 32 have been described as changing continuously. However, the structure of the pressing member 100 according to the present invention is not limited to this. In the pressing member 100 according to the present invention, the slope of the tangent of the first boundary wall 31 may change continuously while the slope of the tangent of the second boundary wall 32 may change discontinuously, or the slope of the tangent of the first boundary wall 31 may change discontinuously while the slope of the tangent of the second boundary wall 32 may change continuously.

[0073] Next, the effects of the pressing component 100 and the cutting tool 200 involved in the above embodiments will be explained.

[0074] The pressing member 100 for fixing the cutting blade 70 to the holder 50 has a first main body 1, a second main body 2, and a third main body 3. A coolant inlet 5 is formed in the first main body 1. A coolant outlet 6 is formed in the second main body 2. The third main body 3 is located between the first main body 1 and the second main body 2. A first flow path 10 is formed in the first main body 1. A second flow path 20 is formed in the second main body 2. A boundary flow path 30 is formed in the third main body 3, connected to both the first flow path 10 and the second flow path 20.

[0075] If the shape of the flow path becomes complex, the energy loss of the fluid flowing within it increases. In particular, when the walls constituting the flow path have angular portions, the energy loss of the fluid in those angular portions increases. As a result, the velocity of the fluid ejected from the coolant nozzle 6 decreases.

[0076] According to the pressing member 100 and cutting tool 200 of the above embodiment, in the first cross section S1 intersecting the first flow path 10, the boundary flow path 30, and the second flow path 20, the boundary flow path 30 is composed of a pair of opposing boundary walls 33. At least one of the pair of boundary walls 33 has a continuously changing slope of its tangent. That is, at least one of the pair of boundary walls 33 has a smoothly curved boundary wall. Therefore, compared to the case where neither of the pair of boundary walls 33 has a smoothly curved boundary wall, the pressing member 100 and cutting tool 200 of the above embodiment can reduce fluid energy loss.

[0077] According to the pressing member 100 and cutting tool 200 of the above embodiment, the lateral width of the first flow path 10 is greater than the longitudinal width of the first flow path 10, and the lateral width of the second flow path 20 is greater than the longitudinal width of the second flow path 20. As a result, the laterally extended coolant can be ejected from the coolant spray outlet 6.

[0078] According to the pressing member 100 and cutting tool 200 of the above embodiment, the first flow path 10 may have a necking portion 41 in which the lateral width of the first flow path 10 decreases monotonically as it moves toward the second flow path 20. When the energy of the fluid introduced into the flow path is the same, the fluid velocity in the region of the flow path with a smaller cross-sectional area is faster than the fluid velocity in the region of the flow path with a larger cross-sectional area. The necking portion 41 in the first flow path 10, which monotonically decreases in lateral width as it moves toward the second flow path 20, reduces fluid energy loss and increases the fluid velocity as it moves from the first flow path 10 toward the second flow path 20.

[0079] According to the pressing member 100 and cutting tool 200 of the above embodiment, the pressing member 100 may further have a cylindrical portion 4 protruding from the second main body portion 2. In the first cross-section S1, the ejection surface 27 on which the coolant nozzle 6 is formed may be parallel to the central axis A of the cylindrical portion 4. When the ejection surface 27 on which the coolant nozzle 6 is formed is parallel to the central axis A of the cylindrical portion 4, compared with the case where the ejection surface 27 on which the coolant nozzle 6 is formed is inclined relative to the central axis A of the cylindrical portion 4, the divergence angle of the coolant ejected from the coolant nozzle 6 can be reduced.

[0080] According to the pressing member 100 and cutting tool 200 of the above embodiment, in the first cross section S1, the second flow path 20 can be formed by a third side surface 23 and a fourth side surface 24 that are opposite to each other. The third side surface 23 can have a first wall surface 21 that is at least 1 mm away from the coolant spray outlet 6. The fourth side surface 24 can have a second wall surface 22 that is at least 1 mm away from the coolant spray outlet 6. The first wall surface 21 can be parallel to the second wall surface 22. When the first wall surface 21 and the second wall surface 22 are parallel, compared with the case where the first wall surface 21 is inclined relative to the second wall surface 22, the fluid is more likely to flow in a direction parallel to both the first wall surface 21 and the second wall surface 22. Therefore, the divergence angle of the coolant sprayed from the coolant spray outlet 6 can be reduced. Therefore, the coolant can be released in a concentrated manner to the cutting edge 73 of the cutting tool 70.

[0081]

Example

[0082] (Preparing samples)

[0083] First, press component 100 for Sample 1 and press component 100 for Sample 2 are prepared. The press component 100 for Sample 1 is a comparative example. Figure 16 This is a cross-sectional schematic diagram showing the structure of the pressing component 100 involved in Sample 1. For example... Figure 16 As shown, according to the pressing component 100 involved in Sample 1, in the first cross section S1 intersecting the first flow path 10, the boundary flow path 30, and the second flow path 20, the boundary flow path 30 is composed of a first boundary wall 31 and a second boundary wall 32. The first boundary wall 31 and the second boundary wall 32 each have sharp edges. That is, the slope of the tangent of the boundary wall on each of the first boundary wall 31 and the second boundary wall 32 changes discontinuously.

[0084] The pressing component 100 involved in Sample 2 is an embodiment. The structure of the pressing component 100 involved in Sample 2 is as follows: Figure 15As shown. According to the pressing component 100 involved in Sample 2, in the first cross section S1 that intersects the first flow path 10, the boundary flow path 30 and the second flow path 20 respectively, the boundary flow path 30 is composed of a first boundary wall 31 and a second boundary wall 32. The first boundary wall 31 and the second boundary wall 32 are each smoothly curved. That is, in each of the first boundary wall 31 and the second boundary wall 32, the slope of the tangent of the boundary wall changes continuously.

[0085] (Evaluation criteria)

[0086] Next, coolant was introduced into the coolant inlet 5 of both the pressing component 100 of Sample 1 and the pressing component 100 of Sample 2, and the divergence angle θ of the coolant ejected from the coolant outlet 6 was measured. The divergence angle θ was determined by photographing the coolant divergence in a direction perpendicular to the first profile S1. Half of the divergence angle θ was defined as the half-apex angle. Assuming that the coolant divergence is an ideal cone shape, the solid angle of the coolant was calculated based on the half-apex angle.

[0087] (Evaluation Results)

[0088] Table 1

[0089] Sample 1 10 0.03 Sample 2 2 0.01

[0090] Table 1 shows the half-apex angle and solid angle of the coolant ejected from the coolant nozzle 6 of the pressing member 100 of Sample 1 and the pressing member 100 of Sample 2, respectively. As shown in Table 1, the half-apex angle and solid angle of the coolant ejected from the coolant nozzle 6 of the pressing member 100 of Sample 1 are 10° and 0.03 spherical angles, respectively. On the other hand, the half-apex angle and solid angle of the coolant ejected from the coolant nozzle 6 of the pressing member 100 of Sample 2 are 2° and 0.01 spherical angles, respectively. It is confirmed that the pressing member 100 of Sample 2 can reduce the coolant divergence angle compared to the pressing member 100 of Sample 1.

[0091] The embodiments and examples disclosed herein are illustrative in all respects and should not be considered limiting. The scope of this invention is not limited to the above-described embodiments and examples, but extends to all modifications within the scope and equivalent of the claims.

[0092] Explanation of the label

[0093] 1 First main body, 2 Second main body, 3 Third main body, 4 Cylindrical part, 5 Coolant inlet, 6 Coolant outlet, 7 Through hole, 8 First recess, 9 Bottom surface, 10 First flow path, 11 First side surface, 12 Second side surface, 15 Fifth side surface, 16 Sixth side surface, 17 Seventh side surface, 18 Eighth side surface, 20 Second flow path, 21 First wall surface, 22 Second wall surface, 23 Third side surface, 24 Fourth side surface, 25 Fifth wall surface, 26 Sixth wall surface, 27 Ejection surface, 30 Boundary flow path, 31 First boundary wall surface, 32 Second boundary wall surface, 33 Boundary wall surface, 41 Necked portion, 42 Width-fixing portion, 50 Holder, 51 Support, 52 Blade Holding part, 53 First end face, 54 Upper surface, 55 Second end face, 56 Protrusion, 60 Fastening component, 70 Cutting blade, 71 Top surface, 72 Outer peripheral surface, 73 Cutting edge, 74 Hole, 80 Pad, 91 Coolant injection port, 92 Second recess, 93 Third recess, 94 Fourth recess, 95 Annular groove, 100 Pressing component, 200 Cutting tool, A Central axis, B Distance, D1 First direction, D2 Second direction, L Tangent, S1 First section, S2 Second section, S3 Third section, W1 First width, W2 Second width, W3 Third width, W4 Fourth width, W5 Fifth width, W6 Sixth width, W7 Seventh width, θ Divergence angle.

Claims

1. A pressing member for securing a cutting blade to a holder, The pressing component has: The first main body has a coolant inlet; The second main body has a coolant spray outlet; and The third main body portion is located between the first main body portion and the second main body portion. A first flow path is formed in the first main body portion, which is connected to the coolant inlet and extends along the first direction. A second flow path is formed in the second main body portion, which is connected to the coolant outlet and extends in a second direction inclined relative to the first direction. A boundary flow path is formed in the third main body portion, which is connected to both the first flow path and the second flow path. In the first cross-section that intersects with the first flow path, the boundary flow path, and the second flow path, the boundary flow path is formed by a pair of opposing boundary walls. In at least one of the pair of boundary walls, the slope of the tangent to the boundary wall changes continuously. In a second cross-section perpendicular to the direction of coolant flow, if the direction opposite to the pair of boundary walls is defined as longitudinal, and the direction perpendicular to the longitudinal direction is defined as transverse, then the transverse width of the first flow path is greater than the longitudinal width of the first flow path, and the transverse width of the second flow path is greater than the longitudinal width of the second flow path. The pressing component also has a cylindrical portion protruding from the second main body portion. In the first cross-section, the ejection surface where the coolant nozzle is formed is parallel to the central axis of the cylindrical portion. The ejection surface is provided along the outer circumferential surface of the cylindrical portion. In the first cross-section, the ejection surface is connected to the cylindrical portion.

2. The pressing component according to claim 1, wherein, The first flow path has a necked portion, the lateral width of which decreases monotonically as it moves toward the second flow path.

3. The pressing component according to claim 2, wherein, In a third cross-section parallel to both the first direction and the transverse direction, the necked portion is formed by a first side surface and a second side surface that are opposite to each other. The first side is straight, and the second side is curved.

4. The pressing component according to claim 2, wherein, In a third cross-section parallel to both the first direction and the transverse direction, the necked portion is formed by a first side surface and a second side surface that are opposite to each other. The first side and the second side are each straight. The first side and the second side are each inclined relative to the first direction.

5. The pressing member according to any one of claims 1 to 4, wherein, In the first cross-section, the second flow route is formed by the third and fourth side surfaces that are opposite each other. The third side has a first wall surface that is more than 1 mm away from the coolant spray outlet. The fourth side has a second wall surface that is more than 1 mm away from the coolant spray outlet. The first wall surface is parallel to the second wall surface.

6. The pressing component according to claim 1, wherein, The first flow path has a necking portion, and the lateral width of the first flow path monotonically decreases as it moves toward the second flow path. In the first cross-section, the second flow route is formed by the third and fourth side surfaces that are opposite each other. The third side has a first wall surface that is more than 1 mm away from the coolant spray outlet. The fourth side has a second wall surface that is more than 1 mm away from the coolant spray outlet. The first wall surface is parallel to the second wall surface.

7. A cutting tool, comprising: The pressing component according to any one of claims 1 to 6; and The retainer is configured with the pressing component.

8. The cutting tool according to claim 7, wherein, It also has the cutting blade that is connected to the pressing member.

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