Support, cutting tool, and method for manufacturing a cutting workpiece

Abstract

Provided is a holder capable of firmly fixing a hammer to a main body and reducing vibration of the main body by reducing positional deviation of an elastic member that fixes the hammer to an inner peripheral surface of the main body. The holder includes: a main body having a rod shape extending from a first end surface to a second end surface along a central axis and having a recess, i.e., a large-diameter portion, extending from the first end surface toward the second end surface; a hammer located inside the large-diameter portion; a first annular elastic member; and a cover pressed into the large-diameter portion from the first end surface side. An inner peripheral surface of the large-diameter portion has a first region located on the first end surface side and a second region located closer to the second end surface than the first region. The first elastic member is in abutment with the inner peripheral surface of the large-diameter portion at the second region and fixes the hammer relative to the inner peripheral surface. The surface roughness of the second region is greater than the surface roughness of the first region.

Description

Technical Field

[0001] This disclosure relates to a support for a cutting tool used in cutting materials such as metals, a cutting tool, and a method for manufacturing the workpiece. Background Technology

[0002] As a cutting tool used for machining materials such as metals, the cutting tool described in Patent Document 1 is known, for example. The cutting tool described in Patent Document 1 has a support and a cutting insert. The support has: a valve stem with a cavity, a hammer inserted into the cavity as a damping member, an O-ring located between the valve stem and the hammer, and a head that blocks the entrance to the cavity.

[0003] A cutting insert with a cutting edge is mounted at the front end of the head. When the protrusion L of the cutting edge from the valve stem end face is larger than the valve stem diameter D, the valve stem containing steel has low rigidity, thus easily generating radial vibration of the valve stem in the support, resulting in poor machining accuracy. The vibration of the support can be reduced by incorporating a hammer with a different natural frequency than the valve stem inside the valve stem, causing the valve stem and hammer to vibrate at different frequencies.

[0004] Prior art literature

[0005] Patent documents

[0006] Patent Document 1: International Publication No. 2020 / 049167 Summary of the Invention

[0007] A bracket, in one non-limiting example of this disclosure, comprises: a body, rod-shaped extending along a central axis from a first end face to a second end face, and having a recess extending from the first end face toward the second end face; a hammer located within the recess; an annular elastic member abutting against the inner circumferential surface of the recess; and a cover pressed into the recess from the first end face side. The inner circumferential surface of the recess has: a first region located on the first end face side, capable of abutting against the cover; and a second region located closer to the second end face than the first region, capable of abutting against the elastic member. The elastic member abuts against the inner circumferential surface in the second region and fixes the hammer relative to the inner circumferential surface. The surface roughness of the second region is greater than the surface roughness of the first region. Attached Figure Description

[0008] Figure 1 This is a perspective view showing a cutting tool in an embodiment of the present disclosure that is not limited thereto.

[0009] Figure 2 yes Figure 1 The top view of the cutting tool shown.

[0010] Figure 3 yes Figure 2 Sectional view along line III-III.

[0011] Figure 4 yes Figure 3 Enlarged view of the first end face.

[0012] Figure 5 yes Figure 3 Enlarged view of the second end face.

[0013] Figure 6 This is an enlarged view of the second end face of the bracket in Modified Example 1.

[0014] Figure 7 This is an enlarged view of the first end face of the bracket in Modified Example 2.

[0015] Figure 8 It is a schematic diagram representing one step of a manufacturing method for a machined object in an example that is not specified.

[0016] Figure 9 It is a schematic diagram representing one step of a manufacturing method for a machined object in an example that is not specified.

[0017] Figure 10 It is a schematic diagram of one step in a method for manufacturing a workpiece in an example that is not limited to cutting. Detailed Implementation

[0018] Hereinafter, a method for manufacturing a support, a cutting tool, and a workpiece, as an example embodiment of this disclosure, will be described in detail using the accompanying drawings. For ease of explanation, only the main components necessary for illustrating the embodiment are simplified in the drawings referred to below. Therefore, the support and the cutting tool can have any of the structural components shown in the referenced figures. Furthermore, the dimensions of the components in the figures do not faithfully represent the actual dimensions of the structural components or the dimensional ratios of each component.

[0019] (Cutting tools)

[0020] Figure 1 This is a perspective view of the cutting tool 10 according to Embodiment 1. Figure 2 This is a top view showing the cutting tool 10. The cutting tool 10 is along... Figure 1 A tool head 2 is mounted on the front end of a cylindrical support 1 extending along the X-axis. A cutting blade (hereinafter referred to as a blade) 3 is mounted on the head 2.

[0021] The cutting tool 10 is, for example, a turning tool. Specific examples include tools for machining external diameters, tools for machining internal diameters, tools for grooving, and tools for cutting. The cutting tool 10 can also be a milling tool that rotates on its tool side. In the following description, the side of the cutting tool 10 where the head 2 is located is referred to as the front end side, and the side opposite to the front end side is referred to as the rear end side.

[0022] (Standard)

[0023] Figure 3 yes Figure 2 Sectional view along line III-III. Figure 4 yes Figure 3 Enlarged view of the first end face. Figure 5 yes Figure 3 Enlarged view of the second end face.

[0024] like Figure 3 As shown, the support 1 of the cutting tool 10 has a main body 11, a cover 12, a first elastic member 14, and a fixing member 16. Examples of materials for the support 1 include stainless steel, cast iron, and aluminum alloys. In particular, using steel in these materials improves the toughness of the support 1. Each component will be described in detail below.

[0025] The main body 11 can also be in the shape of a cylindrical rod extending along the X-axis, with the first end face 11a on the head side and the second end face 11b on the rear end side having central openings. The main body 11 has a through hole 11c inside that extends from the first end face 11a toward the second end face 11b and along the central axis (axis) L (along the X-axis direction) of the support 1.

[0026] The through hole 11c is composed of a large-diameter portion 11d located on the first end face 11a side and a small-diameter portion 11e connected to the large-diameter portion 11d and extending toward the second end face 11b. The large-diameter portion 11d corresponds to a recess extending from the first end face 11a toward the second end face 11b. The through hole 11c is provided by perforating a cylindrical substrate made of the aforementioned material.

[0027] The inner diameter of the smaller diameter portion 11e is smaller than the inner diameter of the larger diameter portion 11d. Both the larger diameter portion 11d and the smaller diameter portion 11e are cylindrical, and the larger diameter portion 11d has a thinner wall than the smaller diameter portion 11e. Figure 2 In the bracket 1, the large diameter portion 11d is approximately 2 / 3 of the length of the bracket 1, and the small diameter portion 11e is approximately 1 / 3 of the length of the bracket 1, but the ratio of the length of the large diameter portion 11d to the length of the small diameter portion 11e is not limited to this case.

[0028] The large diameter portion 11d houses the cover 12, the hammer 13, the first elastic member 14, and the fixing member 16.

[0029] The cover 12 is pressed into the large-diameter portion 11d from the first end face 11a of the main body 11, closing the opening formed on the first end face 11a. Examples of materials for the cover 12 include steel, cast iron, and aluminum alloy. Figure 4 As shown, the cover 12 is generally cylindrical in shape with a first hole 12c, and is pressed into the large-diameter portion 11d so that the axis is aligned with the central axis L. The cover 12 has a flange portion 12a, a recess portion 12b, a first hole 12c, and a protrusion portion 12d.

[0030] The flange 12a is configured to protrude radially outward from the outer periphery of the front end side of the cover 12. The flange 12a abuts against the first end face 11a, restricting the cover 12 from entering the interior of the main body 11. Serrations are provided on the end face of the cover 12 opposite to the head 2. A recess 12b is provided as a circular hole from the center of the end face of the cover 12 opposite to the head 2 toward the rear end side. A cylindrical protrusion 24, described later, is inserted into the recess 12b.

[0031] A ring-shaped second elastic member 15 is located between the recess 12b and the protrusion 24. The second elastic member 15 is, for example, an O-ring or a spring, and can be made of materials such as NBR (acrylonitrile butadiene rubber), AU (polyesterurethane rubber), or synthetic resin. The protrusion 24 is in close contact with the recess 12b via the second elastic member 15. The protrusion 12d is configured to protrude from the rear end face of the cover 12 toward the rear end, and is cylindrical with the central axis L as its central axis. The first hole 12c extends from the recess 12b toward the second end face 11b with its axis aligned with the central axis L, and passes through the protrusion 12d.

[0032] return Figure 3 Hammer 13 is housed in the main body 11 to reduce vibrations of the support 1 generated radially along the support 1. Hammer 13 is a damping member. Hammer 13 is generally cylindrical in shape with a second hole 13c, and is disposed adjacent to the cover 12 within the large diameter portion 11d with its axis aligned with the central axis L. Hammer 13 is housed within the large diameter portion 11d with a slight gap between it and the inner circumferential surface of the large diameter portion 11d.

[0033] Examples of materials that can be used for the Hammer 13 include high-speed steel, superhard alloys, and cermets, all known for their high rigidity. Examples of superhard alloy compositions 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 then sintering it. WC-TiC-Co is formed by adding titanium carbide (TiC) to WC-Co. WC-TiC-TaC-Co is formed by adding tantalum carbide (TaC) to WC-TiC-Co.

[0034] Furthermore, cermets are sintered composite materials formed by combining metal and ceramic components. Specifically, examples of cermets include those with titanium compounds such as titanium carbide (TiC) or titanium nitride (TiN) as the main components.

[0035] The hammer 13 has a recess 13a, a recess 13b, and a second hole 13c. The recess 13a is a circular hole at the center of the end face on the front end side of the hammer 13. The recess 13b is a circular hole at the center of the end face on the rear end side of the hammer 13. The second hole 13c connects the recesses 13a and 13b. A flow tube 19 for coolant to flow through is inserted into the second hole 13c.

[0036] Materials for the flow tube 19 include, for example, metals and resins. Examples of metals include copper, steel, stainless steel, and aluminum. Examples of resins include polyethylene, polypropylene, polystyrene, and polyvinyl chloride. Examples of coolants include non-water-soluble oils such as oil-based, non-active extreme pressure, and active extreme pressure cutting oils, as well as water-soluble oils such as emulsion-type, water-soluble, and solution-type cutting oils.

[0037] like Figure 5 As shown, a fixing member 16 is disposed on the rear end side of the hammer 13 within the large-diameter portion 11d of the through hole 11c. The fixing member 16 fixes the hammer 13 relative to the inner circumferential surface of the large-diameter portion 11d via the first elastic member 14. The fixing member 16 is a generally cylindrical shape with a cavity for inserting the flow tube 19, and is disposed within the large-diameter portion 11d with its axis aligned with the central axis L.

[0038] Materials used for the fixing member 16 include, for example, metal and resin. Examples of metals include copper, steel, stainless steel, and aluminum. Examples of resins include polyethylene, polypropylene, polystyrene, and polyvinyl chloride.

[0039] The fixing member 16 has a protrusion 16a and a groove 16b. The protrusion 16a is configured to protrude from the center of the end face of the fixing member 16 opposite to the hammer 13 toward the hammer 13 and is cylindrical in 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 11d.

[0040] A first elastic member 14 is embedded in the groove 16b of the fixing member 16. The first elastic member 14 is, for example, an O-ring, or may have the same material as the second elastic member 15.

[0041] like Figure 4 As shown, with the annular third elastic member 17 externally embedded inside the recess 13a of the hammer 13, the protrusion 12d of the cover 12 is inserted. Furthermore, as... Figure 5 As shown, with the annular fourth elastic member 18 externally embedded inside the recess 13b, the protrusion 16a of the fixing member 16 is inserted. The third elastic member 17 and the fourth elastic member 18 may also have the same material as the second elastic member 15.

[0042] The third elastic member 17 is crushed between the outer peripheral surface of the protrusion 12d of the cover 12 and the inner peripheral surface of the recess 13a of the hammer 13, thereby fixing the front end of the hammer 13 to the cover 12 by the reaction force (see reference). Figure 4 Furthermore, the fourth elastic member 18 is crushed between the outer peripheral surface of the protrusion 16a of the fixing member 16 and the recess 13b of the hammer 13, thereby fixing the rear end of the hammer 13 to the fixing member 16 (see reference). Figure 5 As a result, the cover 12, hammer 13, and fixing member 16 are integrated. (For example...) Figure 4 As shown, the first hole 12c is connected to the second hole 13c, and the front end of the flow tube 19 enters the first hole 12c.

[0043] The first elastic member 14 contacts the inner circumferential surface of the large-diameter portion 11d of the through hole 11c, and the hammer 13, which is integrated with the fixing member 16, is fixed relative to the inner circumferential surface by the reaction force generated by being crushed. In other words, the hammer 13 is fixed relative to the body 11 by holding its two ends by the cover 12, which is fixed to the body 11 by being pressed into the body 11, and the fixing member 16, which is fixed to the body 11 via the first elastic member 14.

[0044] like Figure 3 As shown, the diameter of the opening on the second end face 11b of the main body 11 is approximately the same as the diameter of the small diameter portion 11e. Coolant is injected into the small diameter portion 11e through this opening. This opening is sealed by a plug 20. The injected coolant is ejected from the ejector portion 23 of the head 2 (described later) during processing via the flow pipe 19.

[0045] like Figure 4as well as Figure 5 As shown, the inner circumferential surface of the large-diameter portion 11d of the through hole 11c is located at the front end of the large-diameter portion 11d, and has a first region A for the cover 12 to abut against, and a second region B located at the rear end of the large-diameter portion 11d for the first elastic member 14 to abut against. The surface roughness of the second region B is greater than that of the first region A. In this embodiment, the surface roughness along the direction of the central axis L is greater in the second region B than in the first region A. As for surface roughness, examples include the arithmetic mean roughness (Ra), maximum height (Rz), and ten-point mean roughness (Rz) based on JISB 0601:2001. JIS )wait.

[0046] The arithmetic mean roughness (Ra) is calculated by taking only a reference length from the roughness curve along the direction of its mean line, taking the X-axis in the direction of the mean line of the extracted portion, and the Y-axis in the direction of the vertical magnification, and expressing the roughness curve in micrometers (μm) using the following formula (1). In this disclosure, the mean line is aligned with the central axis L.

[0047] Ra=1 / l∫0 1 |f(x)|dx···(1)

[0048] The maximum height (Rz) is the distance between the peak and valley lines of the extracted portion, measured along the direction of the mean line of the roughness curve, and expressed in micrometers (μm).

[0049] Ten-point average roughness (Rz) JIS The average length of the roughness curve is extracted only along its mean line. The sum of the absolute values ​​of the elevations (Yp) from the highest peak to the fifth peak, measured along the longitudinal magnification direction, and the absolute values ​​of the elevations (Yv) from the lowest valley to the fifth valley, is calculated and expressed in micrometers (μm).

[0050] As the surface roughness increases, the degree of unevenness also increases. The method for changing the surface roughness of the inner circumferential surface of the large-diameter portion 11d is not limited to a specific method. For example, the surface roughness can also be changed by altering the machining conditions of the drill bit used to form the large-diameter portion 11d or by changing the drill bit used for machining.

[0051] To improve the tightness of the contact between the first elastic member 14 and the inner circumferential surface of the large-diameter portion 11d, and to reduce the positional displacement of the first elastic member 14, the large-diameter portion 11d is formed such that the surface roughness of the second region B is greater than that of the first region A. Consequently, the second region B has a greater degree of unevenness, making it easier for the first elastic member 14 to engage with the unevenness of the second region B, ensuring close contact between the first elastic member 14 and the inner circumferential surface of the large-diameter portion 11d, thus preventing movement.

[0052] Therefore, the fixing member 16 can securely and firmly fix the hammer 13 within the large diameter portion 11d in either the direction along the central axis L (axial) or the direction intersecting the direction along the central axis L (radial). By firmly fixing the hammer 13 inside the body 11, the hammer 13 effectively absorbs radial vibrations of the body 11, thereby effectively reducing vibration.

[0053] In this disclosure, to facilitate the pressing of the cover 12 and prevent it from loosening, a through hole 11c is formed in the first region A where the cover 12 is pressed in, resulting in a surface roughness smaller than that of the second region B, which does not have the degree of unevenness required to firmly fix the first elastic member 14. Therefore, the first region A has a small degree of unevenness and is smooth, making it easy to press the cover 12 in, preventing the pressed-in cover 12 from shaking, and ensuring close contact with the inner circumferential surface of the through hole 11c, making it difficult to loosen.

[0054] The cover 12 has an outer peripheral surface that can abut against the first region A of the large-diameter portion 11d, and the surface roughness of the outer peripheral surface can also be the same as the surface roughness of the first region A. In this embodiment, the surface roughness of the outer peripheral surface can also be the same as the surface roughness of the first region A in the direction along the central axis L. According to the above structure, the position of the cover 12 pressed into the large-diameter portion 11d is not easily shifted in the first region A.

[0055] The main body 11 of the support 1 has an outer surface, and the surface roughness of the outer surface can be lower than that of the first region A. Along the central axis L, the surface roughness of the outer peripheral surface can be the same as that of the first region A. According to the above structure, the outer surface of the main body 11 has minimal unevenness, is smooth, and has a good appearance.

[0056] (Variation Example 1)

[0057] Figure 6 This is an enlarged view of the second end face of the main body 11 of the bracket 1 in Modified Example 1. In the second region B of the large diameter portion 11d of the main body 11 in Modified Example 1, a spiral-shaped groove 11f extending along the central axis L is formed. According to the above structure, the first elastic member 14 is engaged with the unevenness created by the spiral-shaped groove 11f in the second region B, and its position is not easily displaced in the second region B.

[0058] The depth of the groove 11f can also be smaller than the dimension in the direction orthogonal to the central axis L along the cross section of the first elastic member 14. If the depth of the groove 11f is greater than the dimension in the direction orthogonal to the central axis L, it is possible that the first elastic member 14 enters the groove 11f and the hammer 13 abuts against the inner circumferential surface of the large-diameter portion 11d. When the hammer 13 abuts against the inner circumferential surface of the large-diameter portion 11d, the vibration damping effect of the hammer 13 in absorbing the vibration of the support 1 is reduced. According to the above structure, since the depth of the groove is smaller than the dimension in the direction orthogonal to the central axis L, it is difficult for the hammer 13 to abut against the inner circumferential surface of the large-diameter portion 11d.

[0059] (Variation Example 2)

[0060] Figure 7 This is an enlarged view of the front end of bracket 1 in variant example 2. (Compared to...) Figure 4 Comparatively, it can be seen that the inner diameter of the large-diameter portion 11d in the first region A is larger than the inner diameter of the large-diameter portion 11d in the second region B (refer to Figure 5 That is, a step 11g is provided on the inner circumferential surface of the large-diameter portion 11d between the first region A and the second region B. According to the above structure, the inner diameter of the large-diameter portion 11d in the second region B is smaller than the inner diameter of the large-diameter portion 11d in the first region A, thus reducing the amplitude of the hammer 13 and further decreasing its movement. Through the step 11g, the movement of the cover 12 in the X-axis direction is reduced when the cover 12 is pressed into the large-diameter portion 11d.

[0061] (head)

[0062] like Figures 1-3 As shown, the head 2 has a generally cylindrical mounting portion 21 and a polyhedral assembly portion 22 that protrudes from the front end of the mounting portion 21 toward the X-axis. The mounting portion 21 is mounted to the front end of the bracket 1 with its axis aligned with the central axis L of the bracket 1. Serrations are provided on the end face of the mounting portion 21 on the bracket 1 side. The serrations on the mounting portion 21 engage with the serrations formed on the end face of the front end side of the cover 12. With these serrations engaged, the head 2 is mounted to the bracket 1 using screws (not shown) or the like.

[0063] A spray section 23 with an opening is provided on the front end face of the mounting section 21, from which coolant is sprayed. A protrusion 24 is provided at the center of the rear end face of the mounting section 21, protruding toward the cover 12. The front end of the protrusion 24 is connected to the spray section 23 (not shown). As described above, the internal space of the protrusion 24 communicates with the internal space of the flow pipe 19 via the first hole 12c of the cover 12. Coolant injected into the small-diameter section 11e flows through the flow pipe 19 within the protrusion 24 and is sprayed from the spray section 23 toward the material being cut during machining.

[0064] A recessed pouch 22a is provided at one end in the Y-axis direction when viewed from above the assembly part 22 in the Z-axis direction. The recessed pouch 22a has a seat surface (not shown) for mounting the bottom surface of the blade 3 and constraint sides that abut against and are constrained by the two sides of the blade 3. The shape of the blade 3 is not limited to a specific structure. For example, the blade 3 can also be a rod shape, a polygonal plate shape, or a polygonal prism shape. In this embodiment, as... Figure 1 As shown, blade 3 is a rhomboid plate.

[0065] One corner of the rhombus-shaped blade 3 is cut to form a cutting edge 3a. Examples of materials for the blade 3 include hard alloys and cermets. The hard alloy and cermet materials of the blade 3 can also have the same composition as the hard alloy and cermet materials of the hammer 13 described above. A through hole is provided in the center of the blade 3. The bottom surface of the rhombus is placed on the seat surface, and a screw is inserted into the through hole and threaded onto the seat surface, thereby fixing the blade 3 to the recess 22a.

[0066] (Manufacturing method for machined parts)

[0067] Next, the manufacturing method of the machined workpiece according to the embodiments will be described using the accompanying drawings. Figure 8 This is a schematic diagram illustrating one step of a manufacturing method for a machined object 103 in an example that is not specified. Figure 9 This is a schematic diagram illustrating one step of a manufacturing method for a machined object 103 in an example that is not specified. Figure 10 This is a schematic diagram illustrating one step of a manufacturing method for a machined workpiece 103 in an example that is not limited to this one.

[0068] The workpiece 103 is manufactured by machining the workpiece 101. In this embodiment, outer diameter machining is exemplified as the machining process. The manufacturing method of the workpiece 103 in this embodiment includes the following steps. That is,

[0069] (1) The process of rotating the material 101 being cut.

[0070] (2) The process of bringing the cutting tool 10 represented by the above embodiment into contact with the rotating workpiece 101.

[0071] (3) The process of moving the cutting tool 10 away from the material 101 being cut.

[0072] More specifically, firstly, such as Figure 8 As shown, the workpiece 101 is rotated about axis D in the D1 direction. Furthermore, by moving the cutting tool 10 in the D2 direction, the cutting tool 10 is brought relatively closer to the workpiece 101. Next, as... Figure 9As shown, the cutting edge 3a of the cutting tool 10 is brought into contact with the material 101 to be cut, and the material 101 is cut.

[0073] At this point, the outer diameter can be machined by moving the cutting tool 10 in the D3 direction while cutting the workpiece 101. Then, as... Figure 10 As shown, by moving the cutting tool 10 in the D4 direction, the cutting tool 10 is moved away from the material 101 being cut.

[0074] exist Figure 8 In this process, with the fixed axis D and the workpiece 101 rotated, the cutting tool 10 is brought close. Furthermore, in... Figure 9 In this process, the cutting edge 3a of the insert 3 is brought into contact with the rotating workpiece 101 to cut the material 101. Furthermore, in... Figure 10 In the process, the cutting tool 10 is moved away from the workpiece 101 while the workpiece 101 is rotating.

[0075] As described above, in this embodiment, the positional offset of the hammer 13 is reduced, so the radial vibration of the body 11 is well absorbed by the hammer 13, effectively reducing the vibration of the body 11.

[0076] In the cutting process of the manufacturing method of the embodiment, the cutting tool 10 is moved to contact the material 101 being cut. Then, the cutting tool 10 is moved away from the material 101 being cut. However, the manufacturing method of the embodiment is not limited to this.

[0077] For example, in step (1), the material 101 to be cut can be brought closer to the cutting tool 10. Moreover, in step (3), the material 101 to be cut can be moved away from the cutting tool 10. In the case of continuous cutting, it is sufficient to repeatedly perform the steps of keeping the cutting tool 10 in a rotating state and bringing the insert 3 into contact with different parts of the material 101 to be cut.

[0078] Examples of materials that can be used to cut material 101 include carbon steel, alloy steel, stainless steel, cast iron, and non-ferrous metals.

[0079] The invention disclosed herein has been described above based on the accompanying drawings and embodiments. However, the invention disclosed herein is not limited to the embodiments described above. That is, the invention disclosed herein can be modified in various ways within the scope shown in this disclosure, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included within the technical scope of the invention disclosed herein.

[0080] In other words, it should be noted that those skilled in the art can readily make various modifications or alterations based on this disclosure. Furthermore, it should be noted that these modifications or alterations are included within the scope of this disclosure. For example, in the above embodiment, the case where the support 1 of the cutting tool 10 is a round bar has been described, but the support 1 can also be a square bar.

[0081] -Explanation of Figure Markers-

[0082] 1. Bracket

[0083] 11 Main Body

[0084] 11a First end face

[0085] 11b Second end face

[0086] 11c Through hole

[0087] 12. Cover

[0088] 12d protrusion

[0089] 13 hammers

[0090] 13a, 13b recessed parts

[0091] 14 First elastic member

[0092] 15 Second elastic member

[0093] 17 Third elastic member

[0094] 18 Fourth elastic member

[0095] 16 Fixed Components

[0096] 16a protrusion

[0097] 16b groove

[0098] 2 heads

[0099] 21 Installation Department

[0100] 22 Assembly Department

[0101] 22a concave bag

[0102] 3 blades

[0103] 3a cutting edge

[0104] 10 Cutting Tools

[0105] Area A, First Zone

[0106] B, the second area.

Claims

1. A bracket, on which a cutting blade is mounted, having: The main body is a rod-shaped part extending from a first end face to a second end face along a central axis, and has a recess extending from the first end face toward the second end face; A hammer, acting as a damping component, is located within the recess to reduce vibrations of the support generated radially along the support. The elastic member is ring-shaped and abuts against the inner circumferential surface of the recess; A fixing member, via the elastic member, fixes the hammer relative to the inner peripheral surface of the recess; and The cover is pressed into the recess from the first end face side. The inner peripheral surface of the recess has: The first region is located on the first end face side and can abut against the cover; as well as The second region, located closer to the second end face than the first region, is capable of abutting against the elastic member. The elastic member abuts against the inner circumferential surface in the second region and fixes the hammer relative to the inner circumferential surface. The surface roughness of the second region is greater than that of the first region.

2. The stent according to claim 1, wherein, The cover has an outer peripheral surface that can abut against the first region of the recess. The surface roughness of the outer peripheral surface is the same as that of the first region.

3. The stent according to claim 1 or 2, wherein, The main body also has an outer surface. The surface roughness of the outer surface is lower than that of the first region.

4. The stent according to claim 1 or 2, wherein, The second region has a spiral-shaped groove extending along the central axis.

5. The stent according to claim 4, wherein, The depth of the groove is less than the dimension of the elastic member in the direction orthogonal to the central axis in the cross section along the central axis.

6. The stent according to claim 1 or 2, wherein, The inner diameter of the recess in the second region is smaller than the inner diameter of the recess in the first region. The recess also has a step located between the first region and the second region.

7. A cutting tool, comprising: The stent according to claim 1 or 2; and The cutting blade is located on the first end face side of the bracket.

8. A method for manufacturing a workpiece by cutting, comprising: The process of rotating the material being cut; The process of bringing the cutting tool of claim 7 into contact with the rotating workpiece; as well as The process of removing the cutting tool from the material being cut.

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