CN117203012A - 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
- CN117203012A CN117203012A CN202280029349.0A CN202280029349A CN117203012A CN 117203012 A CN117203012 A CN 117203012A CN 202280029349 A CN202280029349 A CN 202280029349A CN 117203012 A CN117203012 A CN 117203012A
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- China
- Prior art keywords
- elastic member
- hole
- end side
- head
- tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 63
- 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 29
- 238000012986 modification Methods 0.000 description 16
- 230000004048 modification Effects 0.000 description 16
- 239000000463 material Substances 0.000 description 14
- 238000003754 machining Methods 0.000 description 13
- 239000002826 coolant Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- -1 cemented carbide Substances 0.000 description 5
- 239000011195 cermet Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 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
- 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
- 150000002739 metals Chemical class 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 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
- 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
- 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
- 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 with reduced positional deviation of a head relative to a main body. The holder has a main body extending along a central axis (L), a head portion which is located closer to the front end side than the main body and is provided with a cutting blade, and an elastic member which is in contact with the cover and the head portion of the main body. The cover body has a recess recessed toward the rear end, and a first hole extending from a bottom surface of the recess. The head portion has a convex portion protruding toward the rear end and fitted into the concave portion, and a second hole extending from the top surface of the convex portion and connected to the first hole. The concave portion has a first connection surface connected to the bottom surface and inclined toward the first end side, and the convex portion has a second connection surface connected to the top surface and inclined toward the first end side. The elastic member is respectively abutted with the first connecting surface and the second connecting surface.
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 tubular main body having a hollow, a head for blocking an inlet of the hollow, a weight as a damping member inserted into the hollow, and an O-ring between the head and the weight.
A cutting insert having a cutting edge is mounted to a front end portion of the head. When the protrusion amount L of the tip end portion of the cutting edge from the end surface of the main body is increased with respect to the diameter D of the main body, the rigidity of the main body made of steel is low, and therefore, vibration in the radial direction of the main body tends to occur in the shank, and the machining accuracy is deteriorated. 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 is a shank in a bar shape extending from a first end to a second end along a central axis, and includes: a body extending along the central axis; a head portion which is located closer to the first end side than the main body and to which a cutting insert can be attached; and an elastic member abutting the body and the head. The main body has: a recess portion located at the first end side and recessed toward the second end; and a first aperture extending from the recess toward the second end. The head has: a convex portion located on the second end side and protruding toward the second end, and fitted with the concave portion; and a second hole extending from the convex portion toward the first end and connected to the first hole. The recess has: a bottom surface orthogonal to the central axis; an inner peripheral surface; and a first connecting surface connecting the inner peripheral surface and the bottom surface and inclined toward the first end side with respect to the bottom surface. The convex portion has: a top surface orthogonal with respect to the central axis; an outer peripheral surface; and a second connecting surface connecting the outer peripheral surface with the top surface and inclined toward the first end side with respect to the top surface. The elastic member is abutted with the first connecting surface and the second connecting surface respectively.
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 a connection portion of the head and the cover of fig. 4.
Fig. 6 is an enlarged view of the second end face side of fig. 3.
Fig. 7 is a cross-sectional view showing a connecting portion between a head of a handle and a cover of modification 1.
Fig. 8 is a cross-sectional view showing a connecting portion between a head of a handle and a cover of modification 2.
Fig. 9 is a cross-sectional view showing a connecting portion between the head of the handle and the lid of modification 3.
Fig. 10 is a schematic view showing a step of a method for manufacturing a machined product in a non-limiting example.
Fig. 11 is a schematic view showing a step of a method for manufacturing a machined product in a non-limiting example.
Fig. 12 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 a head (head) 2 is attached to the front end side of a main body 1a 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 (first end) side, and the side opposite to the front end side is referred to as a rear end (second end) side.
(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. The end surface of the mounting portion 21 on the side of the shank 1 is provided with a serration, which is fitted into a serration formed on the end surface of the shank 1 on the front end side of the lid 12 described later, and the head 2 is mounted to the shank 1 by using a screw (not shown) or the like.
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 cylindrical protruding portion 24 having a second hole 25 described later is provided in a central portion of the end surface of the rear end side of the mounting portion 21 so as to protrude toward the lid 12. The second hole 25 extends toward the distal end side in a state where the axial center coincides with the central axis L (see fig. 4). The tip end portion of the second hole 25 is connected to the ejection portion 23 (not shown).
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. 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.
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.
(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 connection portion between the head 2 and the cover 12 in fig. 4. Fig. 6 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 rod 11, a cover 12, a first elastic member 14, and a fixing member 16. The lever 11 and the cover 12 constitute a main body 1a of the holder 1. The material of the rod 11 may be steel such as stainless steel, cast iron, or an aluminum alloy. In particular, when steel is used among these materials, the toughness of the shank 1 can be improved.
The rod 11 has a round 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 each have a structure with an opening at the center. The rod 11 has a through hole 11c extending from the first end face 11a toward the second end face 11b along a central axis L (X-axis direction) of the shank 1.
The through hole 11c is constituted by 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 through hole 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 11 d. 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 cover 12, the weight 13, the first elastic member 14, and the fixing member 16 are accommodated in the large diameter portion 11 d.
The cover 12 is pushed into the large diameter portion 11d from the first end surface 11a of the lever 11, and closes the opening formed in the first end surface 11 a. The material of the lid 12 may be steel, cast iron, or an aluminum alloy. As shown in fig. 4, the cover 12 is formed in a substantially cylindrical shape having a first hole 12c, and is pressed into the large diameter portion 11d in a state where the axial center coincides with the central axis L.
The cover 12 includes a flange 12a, a recess 12b, a first hole 12c, and a projection 12d. The flange 12a is provided on the outer peripheral portion of the front end side of the cover 12 so as to protrude outward in the radial direction. The flange portion 12a collides with the first end face 11a, so that the entry of the cover 12 into the interior of the lever 11 is restricted. The end surface of the cover 12 facing the head 2 is provided with a serration.
As shown in fig. 4 and 5, the recess 12b is provided in a circular hole shape from the center portion of the end surface of the cover 12 facing the head 2 toward the rear end side. The convex portion 24 of the head 2 is inserted into the concave portion 12b. The recess 12b has a bottom surface 12e orthogonal to the central axis L, an inner peripheral surface 12f, and a first connecting surface 12g connecting the bottom surface 12e and the inner peripheral surface 12f in an inclined manner. That is, the first connection surface 12g is inclined toward the front end side with respect to the bottom surface 12e (Z direction). The inclination angle of the first connecting surface 12g with respect to the bottom surface 12e is, for example, 20 degrees to 60 degrees. The dimension W1 of the first connecting surface 12g in the cross section shown in fig. 5 as the dimension in the Z direction is, for example, 0.05 to 0.3 times the diameter of the first hole 12 c.
The protrusion 12d is provided so as to protrude from the end surface of the lid 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 bottom surface 12e of the recess 12b toward the rear end side in a state where the axial center coincides with the central axis L, and penetrates the protrusion 12d. As shown in fig. 4, the first hole 12c may have a larger diameter at the rear end side than at the front end side.
As shown in fig. 5, the convex portion 24 of the head 2 has a top surface 24a, an outer peripheral surface 24b, and a second connection surface 24c connecting the top surface 24a and the outer peripheral surface 24b obliquely with each other, which are orthogonal to the central axis L. That is, the second connection surface 24c is inclined toward the front end side with respect to the top surface 24a (Z direction). The inclination angle of the second connection surface 24c with respect to the top surface 24a is, for example, 20 degrees to 60 degrees. The dimension W2 of the second connecting surface 24c in the cross section shown in fig. 5 as the dimension in the Z direction is, for example, 0.1 to 0.4 times the diameter of the second hole 25.
An annular second elastic member 15 is interposed between the concave portion 12b and the convex portion 24. The second elastic member 15 is, for example, an O-ring or a spring having a circular ring shape, 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, and the like. The convex portion 24 is fixed to the concave portion 12b via the second elastic member 15. The second elastic member 15 has an inner diameter smaller than that of the first hole 12c, and the second elastic member 15 has an outer diameter larger than that of the first hole 12 c.
The second elastic member 15 is crushed between the bottom surface 12e, the first connection surface 12g, and the inner peripheral surface 12f of the concave portion 12b of the cover 12 and the top surface 24a and the second connection surface 24c of the convex portion 24 of the head 2, thereby fixing the convex portion 24 to the concave portion 12b by its repulsive force. In particular, in the present embodiment, the second elastic member 15 is sandwiched between the inclined first connection surface 12g and the inclined second connection surface 24c, and is in close contact with the first connection surface 12g and the inclined second connection surface 24c. Thus, the second elastic member 15 is less likely to be displaced in both the direction along the central axis L and the direction orthogonal to the central axis L. The positional deviation of the head 2 with respect to the body 1a of the holder 1 is also reduced at the time of machining.
Returning to fig. 3, the weight 13 is accommodated in the rod 11 to reduce vibration of the shank 1 generated in the radial direction of the shank 1. The weight 13 is a damping member. The weight 13 is formed in a substantially cylindrical shape having a third hole 13c, and is disposed in the large diameter portion 11d so as to be adjacent to the cover 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 11 d. The material of the weight 13 may be a high-rigidity material such as high-speed steel, cemented carbide, or cermet.
The weight 13 has a recess 13a, a recess 13b, and a third 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 third 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 third 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. 6, a fixing member 16 is disposed at the rear end side of the weight 13 in the large diameter portion 11d of the through hole 11c. The fixing member 16 fixes the weight 13 to the inner peripheral surface of the large diameter portion 11d via the first elastic member 14. The 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 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 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 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 fixing member 16 opposite to the inner peripheral surface of the large diameter portion 11 d.
The first elastic member 14 is fitted into the groove 16b of the fixing member 16. The first elastic member 14 is, for example, an O-ring, and may have the same material as the second elastic member 15.
Returning to fig. 4, the protruding portion 12d of the cover 12 is inserted into the recess 13a of the weight 13 with the annular third elastic member 17 fitted to the outside. As shown in fig. 6, the protruding portion 16a of the fixing member 16 is inserted into the recess 13b with the annular fourth elastic member 18 fitted.
The third elastic member 17 and the fourth elastic member 18 may have the same material as the second elastic member 15. The third elastic member 17 is compressed between the outer peripheral surface of the protruding portion 12d of the lid 12 and the inner peripheral surface of the concave portion 13a of the weight 13, and thereby fixes the distal end side of the weight 13 to the lid 12 by the repulsive force thereof (see fig. 4).
The fourth elastic member 18 is compressed between the outer peripheral surface of the protruding portion 16a of the fixing member 16 and the inner peripheral surface of the concave portion 13b of the weight 13, whereby the rear end side of the weight 13 is fixed to the fixing member 16 (see fig. 6). As a result, the cover 12, the weight 13, and the fixing member 16 are integrated. 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 third hole 13c.
The first elastic member 14 is pressed down by being in contact with the inner peripheral surface of the large diameter portion 11d of the through hole 11c, and the weight 13 integrated with the fixing member 16 is fixed to the inner peripheral surface of the large diameter portion 11d by repulsive force. That is, the weight 13 is held between the cover 12 fixed to the rod 11 by being pushed into the rod 11 and the fixing member 16 fixed to the rod 11 via the first elastic member 14 at both end portions thereof, and is fixed to the rod 11.
As shown in fig. 3, the diameter of the opening of the second end surface 11b of the rod 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. The injected coolant passes through the draft tube 19 and is ejected from the ejection portion 23 of the head 2 during machining.
The internal space of the draft tube 19 communicates with the discharge portion 23 via the first hole 12c and the second hole 25 of the cover 12. The coolant injected into the small diameter portion 11e flows through the second hole 25 in the convex portion 24 of the draft tube 19, and is ejected from the ejection portion 23 toward the workpiece during machining.
As described above, the first and second connecting surfaces 12g and 24c are less likely to cause positional displacement of the head 2 with respect to the body 1a of the holder 1, and the first and second holes 12c and 25 are excellent in connectivity. When the coolant flows to the first hole 12c and the second hole 25, leakage is less likely to occur at a portion where the first hole 12c and the second hole 25 are connected.
Modification 1
Fig. 7 is a cross-sectional view showing a connection portion between the head 2 and the cover 12 of the handle 1 of modification 1. The recess 12b of the lid 12 of modification 1 has a third connection surface 12h inclined from the front end side toward the rear end side between the bottom surface 12e and the first hole 12c, in addition to the structure shown in fig. 5. In modification 1, the second elastic member 15 also intrudes into the third connecting surface 12h when being crushed, and the positional displacement of the second elastic member 15 is further reduced in both the direction along the central axis L and the direction orthogonal to the central axis L.
Modification 2
Fig. 8 is a cross-sectional view showing a connection portion between the head 2 and the cover 12 of the handle 1 of modification 2. The outer diameter of the second elastic member 15 of modification 2 is larger than the outer diameter of the second elastic member 15 of fig. 5. Therefore, the second elastic member 15 also abuts the outer peripheral surface 24b of the convex portion 24, and the positional displacement of the second elastic member 15 is further reduced.
Modification 3
Fig. 9 is a cross-sectional view showing a connection portion between the head 2 and the cover 12 of the handle 1 of modification 3. The first connection surface 12g of modification 3 is parallel to the second connection surface 24c. In modification 3, the second elastic member 15 is sandwiched between the first connecting surface 12g and the second connecting surface 24c in a state of no skew, and the positional displacement is further reduced in both the direction along the central axis L and the direction orthogonal to the central axis L.
(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. 10 is a schematic view showing a step of a method for manufacturing the machined product 103 in a non-limiting example. Fig. 11 is a schematic view showing a step of a method for manufacturing the machined product 103 in a non-limiting example. Fig. 12 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. 10, 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. 11, 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. 12, by moving the cutting tool 10 in the direction D4, the cutting tool 10 is relatively moved away from the workpiece 101.
In fig. 10, 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. 11, the cutting edge 3a of the insert 3 is brought into contact with the rotating workpiece 101 to cut the workpiece 101. In fig. 12, 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 positional displacement of the head 2 with respect to the main body 1a of the holder 1 is reduced, and thus the machining accuracy is improved. The coolant does not leak from the joint between the head 2 and the cover 12 during processing.
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 shank 1 of the cutting tool 10 is in the shape of a round bar has been described, but the shank 1 may be in the shape of a square bar.
Description of the reference numerals
1, a knife handle; 1a main body; 11 bars; 12 cover bodies; 12b recess; 12c a first hole; 12d protrusions; 12e bottom surface; 12f inner peripheral surface; 12g of a first connection surface; 12h of a third connecting surface; 13 weight; 14 a first resilient member; 15 a second elastic member; 17 a third elastic member; a fourth elastic member 18, a 16 fixing member; 2 heads (heads); 21 mounting parts; 22 fitting parts; 22a knife slot; 24 convex parts; 24a top surface; 24b outer peripheral surfaces; 24c second connection face; 25 a second hole; 3 blades; 3a cutting edge; 10 cutting tool.
Claims (9)
1. A tool shank in the shape of a rod extending along a central axis from a first end to a second end, wherein,
the shank has:
a body extending along the central axis;
a head portion which is located closer to the first end side than the main body and to which a cutting insert can be attached; and
an elastic member abutting the body and the head,
the main body has:
a recess portion located at the first end side and recessed toward the second end; and
a first aperture extending from the recess toward the second end,
the head has:
a convex portion located on the second end side and protruding toward the second end, and fitted with the concave portion; and
a second hole extending from the boss toward the first end and connected to the first hole,
the recess has:
a bottom surface orthogonal to the central axis;
an inner peripheral surface; and
a first connecting surface connecting the inner peripheral surface and the bottom surface and inclined with respect to the bottom surface toward the first end side,
the convex portion has:
a top surface orthogonal with respect to the central axis;
an outer peripheral surface; and
a second connecting surface connecting the outer peripheral surface with the top surface and inclined toward the first end side with respect to the top surface,
the elastic member is abutted with the first connecting surface and the second connecting surface respectively.
2. The tool shank according to claim 1, wherein,
the elastic member abuts against the bottom surface.
3. The tool shank according to claim 1 or 2, wherein,
the elastic member abuts the top surface.
4. The tool shank according to claim 1 or 2, wherein,
the elastic member abuts against the inner peripheral surface.
5. The tool shank according to claim 1 or 2, wherein,
the elastic member abuts the outer peripheral surface.
6. The tool shank according to claim 1 or 2, wherein,
in a cross section along the central axis, the first connection face is parallel to the second connection face.
7. The tool shank according to claim 1 or 2, wherein,
the elastic member is in the shape of a circular ring,
the inner diameter of the elastic member is smaller than the inner diameter of the first hole, and the outer diameter of the elastic member is larger than the inner diameter of the first hole.
8. A cutting tool, wherein,
the cutting tool has:
the tool shank of claim 1 or 2; and
a cutting insert mounted to the head of the shank.
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 |
|---|---|---|---|
| JP2021079249 | 2021-05-07 | ||
| JP2021-079249 | 2021-05-07 | ||
| PCT/JP2022/017230 WO2022234755A1 (en) | 2021-05-07 | 2022-04-07 | Holder, cutting tool, and method for manufacturing cut workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117203012A true CN117203012A (en) | 2023-12-08 |
Family
ID=83932168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280029349.0A Pending CN117203012A (en) | 2021-05-07 | 2022-04-07 | Tool shank, cutting tool, and method for manufacturing cut product |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPWO2022234755A1 (en) |
| CN (1) | CN117203012A (en) |
| DE (1) | DE112022002469T5 (en) |
| WO (1) | WO2022234755A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3532891A1 (en) * | 1985-09-14 | 1987-03-26 | Krupp Gmbh | TOOL CLUTCH |
| US6619165B2 (en) * | 2002-02-01 | 2003-09-16 | Kennametal Inc. | Tunable toolholder |
| JP6324233B2 (en) * | 2014-06-25 | 2018-05-16 | Ｂｉｇ Ｄａｉｓｈｏｗａ株式会社 | Anti-vibration structure of rotating body |
| US9533357B2 (en) * | 2014-06-30 | 2017-01-03 | Kennametal Inc | Optimized vibration absorber |
| US20160067787A1 (en) * | 2014-09-09 | 2016-03-10 | Enrico R. Giannetti | Machine tool having anti-vibration tuning mechanism for chatter minimized machining |
| TWM518124U (en) * | 2015-10-19 | 2016-03-01 | Zhong Yang Cutting Tools Co Ltd | Improved shock absorbing structure for cutting tool |
| WO2020050756A1 (en) | 2018-09-07 | 2020-03-12 | Maq Ab | Mass damper device and working tool |
-
2022
- 2022-04-07 JP JP2023518648A patent/JPWO2022234755A1/ja active Pending
- 2022-04-07 DE DE112022002469.0T patent/DE112022002469T5/en active Pending
- 2022-04-07 WO PCT/JP2022/017230 patent/WO2022234755A1/en active Application Filing
- 2022-04-07 CN CN202280029349.0A patent/CN117203012A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE112022002469T5 (en) | 2024-02-15 |
| WO2022234755A1 (en) | 2022-11-10 |
| JPWO2022234755A1 (en) | 2022-11-10 |
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