CN117241904A - Tool shank, cutting tool, and method for manufacturing cut product - Google Patents
Tool shank, cutting tool, and method for manufacturing cut product Download PDFInfo
- Publication number
- CN117241904A CN117241904A CN202280030370.2A CN202280030370A CN117241904A CN 117241904 A CN117241904 A CN 117241904A CN 202280030370 A CN202280030370 A CN 202280030370A CN 117241904 A CN117241904 A CN 117241904A
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- Prior art keywords
- central axis
- fixing member
- weight
- elastic member
- tool
- Prior art date
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- Pending
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 66
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 title claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 description 15
- 238000003754 machining Methods 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000011195 cermet Substances 0.000 description 6
- 239000002826 coolant Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- -1 cemented carbide Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 3
- 229910009043 WC-Co Inorganic materials 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 229920006311 Urethane elastomer Polymers 0.000 description 2
- 239000010730 cutting oil Substances 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229910003468 tantalcarbide Inorganic materials 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
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
- B23B29/04—Tool holders for a single cutting tool
- B23B29/12—Special arrangements on tool holders
-
- 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
- B23B27/002—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor with vibration damping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/33—Elastomers, e.g. rubber
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
The invention provides a tool shank capable of reducing vibration during cutting, especially vibration in a direction perpendicular to a central axis of the tool shank. The tool shank has: a body having a rod shape extending from a first end face to a second end face along a central axis (L), and having a hollow extending along the central axis (L); and a weight of cylindrical shape inserted into the hollow, a first fixing member located near the first end face, and a first elastic member located between the weight and the first fixing member. In a cross section along the central axis (L), the first elastic member is sandwiched by the weight and the first fixing member in a direction along the central axis (L) and a direction orthogonal to the central axis (L), respectively, and a width in the direction along the central axis (L) is larger than a width in the direction orthogonal to the central axis (L).
Description
Technical Field
The present disclosure relates to a shank of a cutting tool used in cutting a workpiece such as metal, a cutting tool, and a method of manufacturing a cut product.
Background
As a cutting tool used for cutting a workpiece such as a metal, for example, a cutting tool described in patent document 1 is known. The cutting tool described in patent document 1 has a shank and a cutting insert. The tool shank has: the damping device comprises a body having a cavity, a head for blocking an inlet of the cavity, a weight as a damping member inserted into the cavity, and an O-ring between the head and the weight. The vibration of the tool shank can be reduced by accommodating a weight having a natural vibration frequency different from that of the main body in the main body and vibrating the main body and the weight at the different vibration frequencies.
Prior art literature
Patent literature
Patent document 1: international publication No. 2020/049167
Disclosure of Invention
The shank of one non-limiting example in the present disclosure includes: a body having a rod shape extending from a first end face to a second end face along a central axis, and having a hollow extending along the central axis; and an inner member inserted into the cavity. The inner member has: a cylindrical weight extending from the first end face side toward the second end face side; a first fixing member located closer to the first end face than the weight; and a first elastic member located between the weight and the first fixing member. In a cross section along the center axis, the first elastic member is sandwiched by the weight and the first fixing member in a direction along the center axis and a direction orthogonal to the center axis, respectively, and a width in the direction along the center axis is larger than a width in the direction orthogonal to the center axis.
Drawings
Fig. 1 is a perspective view illustrating a cutting tool in a non-limiting embodiment of the present disclosure.
Fig. 2 is a top view of the cutting tool shown in fig. 1.
Fig. 3 is a sectional view taken along line III-III of fig. 2.
Fig. 4 is an enlarged view of the first end face side of fig. 3.
Fig. 5 is an enlarged view of the second end face side of fig. 3.
Fig. 6 is a schematic view showing a step of a method for manufacturing a machined product in a non-limiting example.
Fig. 7 is a schematic view showing a step of a method for manufacturing a machined product in a non-limiting example.
Fig. 8 is a schematic view showing a step of a method for manufacturing a machined product in a non-limiting example.
Detailed Description
Hereinafter, a method of manufacturing a tool shank, a cutting tool, and a machined product according to an embodiment of the present disclosure will be described in detail with reference to the accompanying drawings. However, for convenience of explanation, the drawings referred to below simply show only essential components required for explaining aspects of the embodiments. Therefore, the shank and the cutting tool can include any structural member not shown in the drawings. The dimensions of the members in the drawings do not faithfully represent the actual dimensions of the constituent members, the ratio of the dimensions of the members, and the like.
(cutting tool)
Fig. 1 is a perspective view showing a cutting tool 10 according to embodiment 1. Fig. 2 is a top view illustrating the cutting tool 10. The cutting tool 10 is a tool in which the head 2 is attached to the tip side of a round bar-shaped shank 1 extending in the X-axis direction in fig. 1. A cutting insert (hereinafter referred to as an insert) 3 is mounted on the head 2.
The cutting tool 10 is, for example, a turning tool, and specific examples thereof include a tool for outer diameter machining, a tool for inner diameter machining, a tool for grooving machining, a tool for cutting machining, and the like. The cutting tool 10 may also be a tool side rotating milling tool. In the following description, the side of the cutting tool 10 on which the head 2 is located is referred to as a front end side, and the side opposite to the front end side is referred to as a rear end side.
(knife handle)
Fig. 3 is a sectional view taken along line III-III of fig. 2. Fig. 4 is an enlarged view of the first end face side of fig. 3. Fig. 5 is an enlarged view of the second end face side of fig. 3.
As shown in fig. 3, the shank 1 of the cutting tool 10 has a main body 11, a first fixing member 12, a first elastic member 17, a weight 13, a second fixing member 16, a second elastic member 18, and a third elastic member 14 as internal members. The material of the shank 1 may be steel such as stainless steel, cast iron, or aluminum alloy. In particular, when steel is used among these materials, the toughness of the shank 1 can be improved. Hereinafter, each member will be described in detail.
The body 11 has a circular rod shape extending in the X-axis direction, and the first end face 11a on the head 2 side and the second end face 11b on the rear end side may have a structure with an opening at the center. The body 11 has a hollow 11c extending from the first end face 11a toward the second end face 11b along a central axis (axial center) L (X-axis direction) of the shank 1. The hollow 11c is composed of a large diameter portion 11d located on the first end surface 11a side, and a small diameter portion 11e connected to the large diameter portion 11d and extending toward the second end surface 11 b.
The hollow 11c is provided by punching a cylindrical base material made of the above-described material. The small diameter portion 11e has an inner diameter smaller than that of the large diameter portion 11d. The large diameter portion 11d and the small diameter portion 11e are each cylindrical, and the large diameter portion 11d is thinner than the small diameter portion 11e. In fig. 2, the large diameter portion 11d is approximately 2/3 of the length of the shank 1, and the small diameter portion 11e is approximately 1/3 of the length of the shank 1, but the ratio of the lengths of the large diameter portion 11d and the small diameter portion 11e is not limited to this case.
The first fixing member 12, the first elastic member 17, the weight 13, the second fixing member 16, the second elastic member 18, and the third elastic member 14 are housed in the large diameter portion 11d.
The first fixing member 12 is pushed into the large diameter portion 11d from the first end surface 11a of the main body 11, and functions as a cover for closing the opening formed in the first end surface 11 a. The material of the first fixing member 12 may be steel, cast iron, aluminum alloy, or the like. As shown in fig. 4, the first fixing member 12 is formed in a substantially cylindrical shape having a first hole 12c, is pressed into the large diameter portion 11d in a state where the axial center coincides with the central axis L, and is fixed to the outer peripheral surface of the main body 11 by a pin (not shown).
The first fixing member 12 has a recess 12b, a first hole 12c, a protrusion 12d, and a distal end 12e. The tip portion 12e is located on the first end surface 11a side, and the size (diameter) of the tip portion 12e is larger than the size (diameter) of the large diameter portion 11d in the direction (Z-axis direction) orthogonal to the central axis L.
The end face of the distal end portion 12e facing the head 2 is provided with a serration portion. The distal end portion 12e has a flange portion 12a provided on the outer peripheral portion so as to protrude outward in the radial direction. The surface of the flange portion 12a facing the first end surface 11a, i.e., the surface on the rear end side, abuts against the first end surface 11 a. Thereby, the first fixing member 12 is restricted from entering the inside of the main body 11.
The recess 12b is provided in a circular hole shape from a central portion of an end surface of the first fixing member 12 facing the head 2 toward the rear end side. A cylindrical convex portion 24 described later of the head 2 is inserted into the concave portion 12b. An annular fourth elastic member 15 is interposed between the concave portion 12b and the convex portion 24. The fourth elastic member 15 is an O-ring or a spring, and examples of the material include rubber such as NBR (nitrile rubber; acrylonitrile butadiene rubber) and AU (polyester urethane rubber; polyester urethane rubber), synthetic resin such as epoxy resin, and the like.
The convex portion 24 is fixed to the concave portion 12b via the fourth elastic member 15. The protruding portion 12d is provided so as to protrude from the end surface of the first fixing member 12 on the rear end side toward the rear end, and is formed in a cylindrical shape with the central axis L as the axis. The first hole 12c extends from the recess 12b toward the second end surface 11b so that the axis coincides with the central axis L, and penetrates the protrusion 12d.
Returning to fig. 3, the weight 13 is accommodated in the main body 11 to reduce vibration of the tool shank 1 generated in the radial direction of the tool shank 1. The weight 13 is a damping member. The weight 13 is formed in a substantially cylindrical shape (more precisely, a substantially cylindrical shape) having the second hole 13c, and is disposed in the large diameter portion 11d so as to be adjacent to the first fixing member 12 in a state where the axial center coincides with the central axis L. The weight 13 is accommodated in the large diameter portion 11d with a slight gap from the inner peripheral surface of the large diameter portion 11d.
The material of the weight 13 may be a high-rigidity material such as high-speed steel, cemented carbide, or cermet. Examples of the composition of the cemented carbide include WC-Co, WC-TiC-Co, and WC-TiC-TaC-Co. WC-Co is produced by adding cobalt (Co) powder to tungsten carbide (WC) and sintering. WC-TiC-Co is formed by adding titanium carbide (TiC) to WC-Co. WC-TiC-TaC-Co is made by adding tantalum carbide (TaC) to WC-TiC-Co.
The cermet is a sintered composite material in which a metal is compounded in a ceramic component. Specifically, examples of the cermet include a cermet containing a titanium compound such as titanium carbide (TiC) or titanium nitride (TiN) as a main component.
The weight 13 has a recess 13a, a recess 13b, and a second hole 13c. The recess 13a is provided in a circular hole shape in a central portion of the end face of the weight 13 on the distal end side. The recess 13b is provided in a circular hole shape in a central portion of the end face of the rear end side of the weight 13. The second hole 13c is provided so as to communicate the recess 13a with the recess 13 b. A through-flow pipe 19 through which the coolant flows is inserted into the second hole 13c.
Examples of the material of the draft tube 19 include metal and resin. Examples of the metal include copper, steel, stainless steel, and aluminum. Examples of the resin include polyethylene, polypropylene, polystyrene, and polyvinyl chloride. Examples of the coolant include water-insoluble oils such as oil-type, non-active polar type and active polar type cutting oils, and water-soluble oils such as emulsion type, soluble type and solution type cutting oils.
As shown in fig. 4, the protruding portion 12d of the first fixing member 12 is inserted into the inside of the concave portion 13a of the weight 13 in a state where the annular first elastic member 17 is fitted outside. The first elastic member 17 may have the same material as the fourth elastic member 15. The first elastic member 17 is sandwiched between the protruding portion 12d of the first fixing member 12 and the concave portion 13a of the weight 13 and flattened, whereby the tip end side of the weight 13 is fixed to the first fixing member 12 by its repulsive force.
In the cross section (cross section along the central axis L) in fig. 4, the first elastic member 17 is sandwiched by the rear end surface of the first fixing member 12 and the bottom surface of the recess 13a of the weight 13 in the direction along the central axis L (X-axis direction). In this way, when the first elastic member 17 is sandwiched between the first fixing member 12 and the weight 13 in the X-axis direction, the cutting load (for example, a back force) applied from the first fixing member 12 to the weight 13 in the X-axis direction can be relaxed in the first elastic member 17.
In a cross section along the central axis L, the first elastic member 17 is sandwiched by the outer peripheral surface of the protruding portion 12d and the inner peripheral surface of the concave portion 13a in a direction (Z-axis direction) orthogonal to the central axis L. In this way, when the first elastic member 17 is sandwiched between the first fixing member 12 and the weight 13 in the Z-axis direction, the cutting load (for example, the main component force and the feeding component force) applied from the first fixing member 12 to the weight 13 in the Z-axis direction can be relaxed in the first elastic member 17.
As described above, the weight 13 is accommodated in the main body 11 to reduce the vibration of the tool shank 1 generated in the radial direction of the tool shank 1. Here, in a cross section along the central axis L as shown in fig. 4, when the width a of the first elastic member 17 in the X-axis direction is larger than the width b of the first elastic member 17 in the Z-axis direction, the cutting load can be relaxed in the first elastic member 17, and the effect of reducing the vibration by the weight 13 can be improved. The width a of the first elastic member 17 in the X-axis direction being larger than the width b of the first elastic member 17 in the Z-axis direction may also be said to be a flat shape elongated in the X-axis direction.
In the case where the width b in the Z-axis direction is relatively small, the deformation amount of the first elastic member 17 in the Z-axis direction is small. Therefore, at the time of vibration of the weight 13 in the Z-axis direction, the end portion of the weight 13 that is in contact with the first elastic member 17 easily functions as a so-called fixed end. Therefore, damage to the weight 13 can be avoided, and the effect of reducing vibration by the weight 13 can be improved. Further, since the width a in the X-axis direction is also large in addition to the area of the first elastic member 17 in the cross section along the central axis L, the first elastic member 17 is less likely to deteriorate, and the effect of reducing the cutting load by the first elastic member 17 can be ensured. The ratio a/b of the width a to the width b may be 1.1 or more and 3 or less.
As shown in fig. 5, the second fixing member 16 is disposed at the rear end side of the weight 13 in the large diameter portion 11d of the hollow 11c. The second fixing member 16 fixes the weight 13 to the inner peripheral surface of the large diameter portion 11d via the third elastic member 14. The second fixing member 16 is formed in a substantially cylindrical shape having a hollow portion into which the draft tube 19 is inserted, and is disposed in the large diameter portion 11d in a state where the axial center coincides with the central axis L.
The material of the second fixing member 16 may be, for example, metal or resin. Examples of the metal include steel, cast iron, and aluminum alloy. Examples of the resin include polyethylene, polypropylene, polystyrene, and polyvinyl chloride.
The second fixing member 16 has a protrusion 16a and a groove 16b. The protrusion 16a is provided so as to protrude from a central portion of an end surface of the second fixing member 16 facing the weight 13 toward the weight 13, and is formed in a cylindrical shape. The groove 16b is provided circumferentially around the outer peripheral surface of the second fixing member 16 opposite to the inner peripheral surface of the large diameter portion 11d.
The third elastic member 14 is fitted into the groove 16b of the second fixing member 16. The third elastic member 14 is, for example, an O-ring, and may have the same material as the fourth elastic member 15.
As shown in fig. 5, the protruding portion 16a of the second fixing member 16 is inserted into the inside of the concave portion 13b in a state where the annular second elastic member 18 is fitted outside. The second elastic member 18 may have the same material as the fourth elastic member 15.
The second elastic member 18 is sandwiched and crushed by the protrusion 16a of the second fixing member 16 and the recess 13b of the weight 13, and the rear end side of the weight 13 is fixed to the second fixing member 16 by the repulsive force caused by this. The third elastic member 14 is pressed down by contact with the inner peripheral surface of the large diameter portion 11d of the hollow 11c, and the second fixing member 16 is fixed to the large diameter portion 11d by repulsive force generated by this contact. That is, the weight 13 is fixed to the large diameter portion 11d by being integrated with the first fixing member 12 and the second fixing member 16 by the first fixing member 12 having both end portions fixed to the large diameter portion 11d and the second fixing member 16 fixed to the large diameter portion 11d via the third elastic member 14.
In the cross section (cross section along the central axis L) in fig. 5, the second elastic member 18 is sandwiched by the bottom surface of the concave portion 13b of the weight 13 and the front end side surface in the second fixing member 16 in the X-axis direction. In this way, when the second elastic member 18 is sandwiched between the second fixing member 16 and the weight 13 in the X-axis direction, the cutting load (for example, a back force) applied from the second fixing member 16 to the weight 13 in the X-axis direction can be relaxed in the second elastic member 18.
The second elastic member 18 is sandwiched between the inner peripheral surface of the concave portion 13b and the outer peripheral surface of the protruding portion 16a in the Z-axis direction. In this way, when the second elastic member 18 is sandwiched between the second fixing member 16 and the weight 13 in the Z-axis direction, the cutting load (for example, the main component force and the feeding component force) applied from the second fixing member 16 to the weight 13 in the Z-axis direction can be relaxed in the second elastic member 18.
As described above, the weight 13 is accommodated in the main body 11 to reduce the vibration of the tool shank 1 generated in the radial direction of the tool shank 1. Here, in a cross section along the central axis L as shown in fig. 5, when the width c of the second elastic member 18 in the X-axis direction is larger than the width d in the Z-axis direction, the cutting load can be relaxed in the second elastic member 18, and the effect of reducing the vibration by the weight 13 can be improved. The width c of the second elastic member 18 in the X-axis direction being larger than the width d in the Z-axis direction may also be said to mean that the second elastic member 18 is a flat shape elongated in the X-axis direction.
In the case where the width b in the Z-axis direction is relatively small, the deformation amount of the second elastic member 18 in the Z-axis direction is small. Therefore, the end portion of the weight 13 that contacts the second elastic member 18 easily functions as a so-called fixed end during vibration of the weight 13 in the Z-axis direction. Therefore, damage to the weight 13 can be avoided, and the effect of reducing vibration by the weight 13 can be improved. Further, since the width a in the X-axis direction is also large in addition to the area of the second elastic member 18 in the cross section along the central axis L, the second elastic member 18 is less likely to deteriorate, and the effect of alleviating the cutting load by the second elastic member 18 can be ensured. The ratio c/d of the width c to the width d may be 1.1 or more and 3 or less.
As shown in fig. 3, the diameter of the opening of the second end surface 11b of the main body 11 is substantially equal to the diameter of the small diameter portion 11e. The coolant is injected from the opening into the small diameter portion 11e. The opening is closed off by a plug 20. As shown in fig. 4, the tip end portion of the draft tube 19 is inserted into the first hole 12c, and the first hole 12c is connected to the second hole 13c. The injected coolant passes through the draft tube 19 and is discharged from a discharge portion 23 of the head 2, which will be described later, during processing.
(head)
As shown in fig. 1 to 3, the head 2 includes a mounting portion 21 formed in a substantially cylindrical shape, and a fitting portion 22 provided so as to protrude from a front end surface of the mounting portion 21 in the X-axis direction and formed in a polyhedral shape. The mounting portion 21 is mounted on the front end portion of the shank 1 in a state where the axial center coincides with the central axis L of the shank 1. A serration is provided on the end surface of the mounting portion 21 on the shank 1 side. The serration provided in the mounting portion 21 is fitted into the serration formed in the end surface of the distal end side of the first fixing member 12. The head 2 is attached to the shank 1 with screws (not shown) or the like in a state where the serration portions are fitted.
A discharge portion 23 is provided on the front end surface of the mounting portion 21, and the discharge portion 23 has an opening portion and discharges the coolant from the opening portion. A convex portion 24 is provided in a central portion of the end surface of the rear end side of the mounting portion 21 in a state protruding toward the first fixing member 12. The tip end of the protruding portion 24 is connected to the ejection portion 23 (not shown). As described above, the inner space of the convex portion 24 communicates with the inner space of the draft tube 19 via the first hole 12c of the first fixing member 12. The coolant injected into the small diameter portion 11e flows through the draft tube 19 in the convex portion 24, and is ejected from the ejection portion 23 toward the workpiece during machining.
A pocket 22a is provided at one end in the Y-axis direction when the fitting portion 22 is viewed in plan from the Z-axis direction. The pocket 22a has a support surface (not shown) on which the bottom surface of the insert 3 is placed, and a restraining side surface that abuts against both side surfaces of the insert 3 to restrain the insert. The shape of the blade 3 is not limited to a specific configuration. For example, the shape of the blade 3 may be a bar shape, a polygonal plate shape, or a polygonal prism shape structure. In the present embodiment, the blade 3 has a diamond plate shape as shown in fig. 1.
One corner of the diamond shape of the insert 3 is cut off to become a cutting edge 3a. The material of the insert 3 may be cemented carbide, cermet, or the like. The cemented carbide and the cermet may have the same composition as those of the weight 13. A through hole is provided in the center of the insert 3, a diamond-shaped bottom surface is placed on the support surface, and a screw is screwed through the through hole to the support surface, whereby the insert 3 is fixed to the pocket 22a.
(method for producing cut product)
Next, a method for manufacturing a machined product according to an embodiment will be described with reference to the drawings. Fig. 6 is a schematic view showing a step of a method for manufacturing the machined product 103 in a non-limiting example. Fig. 7 is a schematic view showing a step of a method for manufacturing the machined product 103 in a non-limiting example. Fig. 8 is a schematic view showing a step of a method for manufacturing the machined product 103 in a non-limiting example.
The machined product 103 is produced by machining the workpiece 101. In the embodiment, the outer diameter machining is exemplified as the cutting machining. The method for manufacturing the machined product 103 according to the embodiment includes the following steps. Namely, the method comprises the following steps:
(1) A step of rotating the workpiece 101;
(2) A step of bringing the cutting tool 10 represented by the above-described embodiment into contact with the rotating workpiece 101; and
(3) And a step of separating the cutting tool 10 from the workpiece 101.
More specifically, first, as shown in fig. 6, the workpiece 101 is rotated in the direction D1 about the axis D. Further, by moving the cutting tool 10 in the D2 direction, the cutting tool 10 is relatively brought close to the workpiece 101. Next, as shown in fig. 7, the cutting edge 3a of the cutting tool 10 is brought into contact with the workpiece 101, thereby cutting the workpiece 101.
At this time, the outer diameter machining can be performed by cutting the workpiece 101 while moving the cutting tool 10 in the D3 direction. Then, as shown in fig. 6, by moving the cutting tool 10 in the direction D4, the cutting tool 10 is relatively moved away from the workpiece 101.
In fig. 6, the cutting tool 10 may be brought close in a state in which the shaft D is fixed and the workpiece 101 is rotated. In fig. 7, the cutting edge 3a of the insert 3 is brought into contact with the rotating workpiece 101 to cut the workpiece 101. In fig. 8, the cutting tool 10 is moved away from the workpiece 101 in a state of being rotated.
As described above, in the present embodiment, the first elastic member 17 and the second elastic member 18 have a cross section that is elongated and flat in the direction along the central axis L, and thus the vibration of the main body 11 in the direction orthogonal to the central axis L is reduced.
In the cutting process in the manufacturing method of the embodiment, the cutting tool 10 is brought into contact with the workpiece 101 by moving the cutting tool 10. Then, the cutting tool 10 is moved away from the workpiece 101 by moving the cutting tool 10. However, the manufacturing method of the embodiment is not limited to this case.
For example, in the step (1), the workpiece 101 may be brought close to the cutting tool 10. In the step (3), the workpiece 101 may be separated from the cutting tool 10. In the case of continuing the cutting process, the cutting tool 10 may be rotated, and the step of bringing the insert 3 into contact with a different portion of the workpiece 101 may be repeated.
Typical examples of the material of the workpiece 101 include carbon steel, alloy steel, stainless steel, cast iron, and nonferrous metals.
The invention of the present disclosure has been described above based on the drawings and the embodiments. However, the invention of the present disclosure is not limited to the above embodiments. That is, the invention of the present disclosure can be variously modified within the scope shown in the present disclosure, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments are also included in the technical scope of the invention of the present disclosure.
That is, it should be noted that various modifications or corrections are easily made based on the present disclosure by those skilled in the art. In addition, it is to be noted that such variations or modifications are included in the scope of the present disclosure. For example, in the above embodiment, the case where the handle 1 of the cutting tool 10 is in the shape of a round bar has been described, but it may be in the shape of a square bar. In addition, the first elastic member 17 and the second elastic member 18 are both described as having a flat shape in a cross section elongated in the direction along the central axis L, but either one may be flat.
Description of the reference numerals
1. A shank 11 main body; 11a first end face; 11b second end face 11c cavity; 12. a first fixing member; 12a flange portions; 12d protrusions; 13. a weight; 13a, 13b recesses; 14. a third elastic member; 15. a fourth elastic member; 16. a second fixing member; 17. a first elastic member; 18. a second elastic member; 16a protrusions; 16b grooves; 2. a head; 24. a convex portion; 3. a blade; 3a cutting edge; 10. a cutting tool.
Claims (9)
1. A knife handle, wherein, the knife handle comprises a knife handle body,
the shank has:
a body having a rod shape extending from a first end face to a second end face along a central axis, and having a hollow extending along the central axis; and
an inner member inserted into the hollow,
the inner member has:
a cylindrical weight extending from the first end face side toward the second end face side;
a first fixing member located closer to the first end face than the weight; and
a first elastic member located between the weight and the first fixing member,
in a cross section along the central axis, the first elastic member is sandwiched by the weight and the first fixing member in a direction along the central axis and a direction orthogonal to the central axis, respectively, and a width of the first elastic member in the direction along the central axis is larger than a width in the direction orthogonal to the central axis.
2. The tool shank according to claim 1, wherein,
in a cross section along the central axis, the first elastic member is abutted against the weight and the first fixing member in a direction along the central axis and a direction orthogonal to the central axis, respectively.
3. The tool shank according to claim 1 or 2, wherein,
the first fixing member has a front end portion located on the first end face side,
the dimension of the tip portion is larger than the dimension of the cavity in a direction orthogonal to the central axis.
4. The tool shank according to claim 3, wherein,
the portion of the distal end portion facing the peripheral edge portion of the first end surface is in contact with the first end surface.
5. The tool shank according to claim 1 or 2, wherein,
the inner member further has:
a second fixing member located closer to the second end face than the weight; and
a second elastic member located between the weight and the second fixing member,
in a cross section along the center axis, the second elastic member is sandwiched by the weight and the second fixing member in a direction along the center axis and a direction orthogonal to the center axis, respectively, and a width of the second elastic member in the direction along the center axis is larger than a width in the direction orthogonal to the center axis.
6. The tool shank according to claim 5, wherein,
in a cross section along the central axis, the second elastic member is abutted against the weight and the second fixing member in a direction along the central axis and a direction orthogonal to the central axis, respectively.
7. The tool shank according to claim 5, wherein,
the tool shank further has a third elastic member located between the main body and the second fixing member, abutting the main body and the second fixing member in a direction orthogonal to the central axis,
the first fixing member is pressed into the hollow.
8. A cutting tool, wherein,
the cutting tool has:
the tool shank of claim 1 or 2; and
a cutting insert located in the shank on the first end face side.
9. A method for manufacturing a machined product, wherein,
the method for manufacturing the machined product comprises the following steps:
a step of rotating the workpiece;
a step of bringing the cutting tool according to claim 8 into contact with the rotating workpiece; and
and a step of separating the cutting tool from the workpiece.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-079250 | 2021-05-07 | ||
| JP2021079250 | 2021-05-07 | ||
| PCT/JP2022/017231 WO2022234756A1 (en) | 2021-05-07 | 2022-04-07 | Holder, cutting tool, and method for manufacturing cut workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117241904A true CN117241904A (en) | 2023-12-15 |
Family
ID=83932396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280030370.2A Pending CN117241904A (en) | 2021-05-07 | 2022-04-07 | Tool shank, cutting tool, and method for manufacturing cut product |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPWO2022234756A1 (en) |
| CN (1) | CN117241904A (en) |
| DE (1) | DE112022002468T5 (en) |
| WO (1) | WO2022234756A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3774730A (en) * | 1972-04-19 | 1973-11-27 | Nl Industries Inc | Tool holder |
| GB2322426B (en) * | 1988-06-17 | 1999-06-09 | Marconi Co Ltd | Method and arrangement for damping vibration |
| NO172677C (en) * | 1991-02-21 | 1993-08-25 | Teeness As | Device for damping vibrations, for example self-generated oscillations in drill rods and the like |
| JP2001179510A (en) * | 1999-12-21 | 2001-07-03 | Mitsubishi Materials Corp | Vibration control tool |
| US6619165B2 (en) * | 2002-02-01 | 2003-09-16 | Kennametal Inc. | Tunable toolholder |
| JP4648072B2 (en) * | 2005-04-28 | 2011-03-09 | 株式会社日立プラントテクノロジー | Tool with damper and method of manufacturing impeller or guide vane of fluid machine using the same |
| US20160067787A1 (en) * | 2014-09-09 | 2016-03-10 | Enrico R. Giannetti | Machine tool having anti-vibration tuning mechanism for chatter minimized machining |
| WO2020050756A1 (en) | 2018-09-07 | 2020-03-12 | Maq Ab | Mass damper device and working tool |
-
2022
- 2022-04-07 WO PCT/JP2022/017231 patent/WO2022234756A1/en active Application Filing
- 2022-04-07 DE DE112022002468.2T patent/DE112022002468T5/en active Pending
- 2022-04-07 JP JP2023518649A patent/JPWO2022234756A1/ja active Pending
- 2022-04-07 CN CN202280030370.2A patent/CN117241904A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022234756A1 (en) | 2022-11-10 |
| DE112022002468T5 (en) | 2024-02-15 |
| JPWO2022234756A1 (en) | 2022-11-10 |
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