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

Abstract

The unconfined side of the holder is a rod shape extending along a central axis, having a head and a stem. The head has an upper jaw, a lower jaw, and a pocket. The lower jaw has a restraining surface. The holder also has a slit extending from the restraining surface toward the rear end. The slit has an ascending portion and a descending portion. In a direction along the central axis, the descending portion is longer than the ascending portion.

Description

Technical Field

[0001] This disclosure relates to a support in a cutting tool for cutting a material. Examples of cutting operations include, for instance, grooving and drilling. Background Technology

[0002] As cutting tools used for machining materials, examples include those described in Patent Documents 1 and 2. The holders in the cutting tools described in Patent Documents 1 and 2 each have a pocket for inserting a cutting blade and a slit extending rearward from the pocket. The slit described in Patent Document 1 slopes upward as it moves away from the pocket. The slit described in Patent Document 2 slopes downward as it moves away from the pocket.

[0003] Prior art literature

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Publication No. 2018-527208

[0006] Patent Document 2: Japanese Patent Application Publication No. 2018-202530 Summary of the Invention

[0007] The undefined support disclosed herein is a rod-shaped support for a cutting tool extending along a central axis from a rear end toward a front end. The support has: a head located on the front end side; and a handle located further back than the head on the rear end side. The head has: an upper jaw portion; a lower jaw portion; and a pouch located between the upper and lower jaw portions for inserting a cutting blade. The lower jaw portion has a restraining surface capable of abutting against an end face of the rear end side of the cutting blade. The support also has a slit extending from the restraining surface to the rear end. The slit has: an ascending portion connected to the upper end of the restraining surface and inclined upward toward the rear end; and a descending portion located near the rear end, closer to the ascending portion, and inclined downward toward the rear end. Furthermore, along the central axis, the descending portion is longer than the ascending portion. Attached Figure Description

[0008] Figure 1 This is a perspective view of a cutting tool in an undefined embodiment.

[0009] Figure 2 It is Figure 1 The image shown is an enlarged view of region A1.

[0010] Figure 3 Viewed from the front end Figure 1The top view of the cutting tool shown.

[0011] Figure 4 Viewed from B1 direction Figure 3 The side view of the cutting tool shown.

[0012] Figure 5 Observed from B2 direction Figure 3 The side view of the cutting tool shown.

[0013] Figure 6 It is Figure 5 The image shown is an enlarged view of region A2.

[0014] Figure 7 It means Figure 1 A three-dimensional view of the support in the cutting tool shown.

[0015] Figure 8 It is Figure 1 The image shown is an enlarged view of area A3.

[0016] Figure 9 Viewed from the front end Figure 1 The top view of the bracket shown.

[0017] Figure 10 Observed from B3 direction Figure 3 The side view of the bracket shown.

[0018] Figure 11 Viewed from B4 direction Figure 3 The side view of the bracket shown.

[0019] Figure 12 It is Figure 5 The area shown is an enlarged view of area A4.

[0020] Figure 13 It is an emphasis Figure 12 A schematic diagram showing the tilt angle of the slit in the support.

[0021] Figure 14 This is a schematic diagram illustrating one step in a method for manufacturing a machined object in an undefined embodiment.

[0022] Figure 15 This is a schematic diagram illustrating one step in a method for manufacturing a machined object in an undefined embodiment.

[0023] Figure 16 This is a schematic diagram illustrating one step in a method for manufacturing a machined object in an undefined embodiment. Detailed Implementation

[0024] The cutting tool 101 and the support 201, which are not defined in this disclosure, are described in detail with reference to the accompanying drawings. Examples of cutting tools 101 include turning tools and milling tools. Examples of turning tools include grooving tools and drilling tools. Figure 1 In one example not specified, the cutting tool 101 is a piercing tool.

[0025] In the figures referred to below, for ease of explanation, only the main components constituting an undefined embodiment are shown in a simplified manner. Therefore, the cutting tool 101 can have any structural components shown in the figures. Furthermore, the dimensions of the components in the figures are not limited to faithfully representing the actual dimensions of the structural components or the dimensional ratios of each component.

[0026] <Cutting Tools>

[0027] The cutting tool 101 may also have a support 201 and a cutting insert 301 (hereinafter, also simply referred to as "insert"). The support 201 and the insert 301 are separate components, and the support 201 is used to hold the insert 301. If the insert 301 wears during the cutting of the workpiece, the worn insert 301 can be removed from the support 201, and a different insert 301 can be fitted onto the support 201. By replacing the insert 301, the cutting of the workpiece can continue.

[0028] <Standard>

[0029] The support 201 is a rod-shaped structure extending along the central axis O1 from the first end 201a toward the second end 201b. For example... Figure 1 As in the undefined example shown, the support 201 can also be in the shape of a quadrangular prism. The first end 201a can also be referred to as the "front end" and the second end 201b can also be referred to as the "rear end".

[0030] exist Figure 1 In one undefined example shown, the lower left end of the electrical support 201 is the front end 201a, and the upper right end is the rear end 201b. Furthermore, in Figure 5 In one example that is not limited to the one shown, the left end of the support 201 may be the front end 201a and the right end may be the rear end 20lb.

[0031] The bracket 201 may also have a head 1 and a handle 3. The head 1 may also be located on one side of the front end 201a of the bracket 201. The head 1 may also be as follows: Figure 1 As shown in the undefined example, it includes the end face on the front end 201a side. The handle 3 may also be located on the rear end 201b side of the head 1. The handle 3 may also be as follows: Figure 1As shown in the undefined example, it includes the end face on the rear end 201b side.

[0032] Handle 3 only needs to be located on the side 201b further back than head 1. Handle 3 can also be as follows: Figure 1 As shown in the undefined example, it includes the central portion of the support 201 along the direction of the central axis O1.

[0033] The shank 3 can also be a part held by the machine tool when the cutting tool 101 is mounted on the machine tool. On the other hand, the head 1 can also be a part used to hold the insert 301. For example... Figure 2 As shown, the head 1 can also be a structure with a pair of opposing jaws (upper jaw 5 and lower jaw 7). The handle 3 is a part that can be gripped by a machine tool, and is generally a simple cylindrical or prismatic shape. Therefore, the central axis of the handle 3 can also be regarded as the central axis O1 of the support 201.

[0034] The head 1 may also have an upper jaw 5, a lower jaw 7, and a pouch 9. Depending on the positional relationship between the opposing upper jaw 5 and lower jaw 7, the direction from the lower jaw 7 towards the upper jaw 5 may be defined as "above," and the direction from the upper jaw 5 towards the lower jaw 7 as "below." The pouch 9 may also be a space located between the upper jaw 5 and the lower jaw 7. A blade 301 can be inserted into the pouch 9. The blade 301 may also be fixed to the bracket 201 by being held between the upper jaw 5 and the lower jaw 7.

[0035] The lower jaw 7 may also have a constraint surface 11. The constraint surface 11 may also be able to abut against the end face of the rear end of the cutting blade 301. Since the blade 301 can be inserted into the pocket 9, the constraint surface 11 can also be considered to be located at the rear end of the pocket 9.

[0036] The constraint surface 11 is not limited to a specific shape. For example, the constraint surface 11 can be a convex curved surface, or it can be... Figure 8 As shown in the undefined example, the constraint surface 11 is planar. When the constraint surface 11 is planar, it easily contacts the surface of the blade 301. Therefore, the blade 301 can be stably positioned on the constraint surface 11.

[0037] The support 201 may also have a slit 13. The slit 13 may also extend from the restraint surface 11 toward the rear end 201b of the support 201. When the support 201 has a slit 13, the spacing between the upper jaw 5 and the lower jaw 7 in the head 1 can be changed by deforming the head 1. Therefore, the blade 301 can be easily loaded and unloaded into the pouch 9.

[0038] The slit 13 may be located solely within the head 1 along the direction of the central axis O1; alternatively, it may be configured from the head 1 to the shank 3. In the slit 13 as... Figure 11In the case shown as an undefined example where the head 1 is positioned to the handle 3, the internal stress generated by the deformation of the head 1 is easily dispersed to the handle 3. Therefore, the durability of the bracket 201 is improved.

[0039] The slit 13 may also have a first part 15 and a second part 17. The first part 15 may also be a portion located on one side of the front end of the slit 13, connected to the constraint surface 11. Figure 12 As in the undefined example shown, if the opening of the slit 13 is located above the constraint surface 11, the first part 15 can also be connected to the upper end of the constraint surface 11.

[0040] The first part 15 can extend parallel to the central axis O1, and can also tilt upwards toward the rear end 201b. When at least the first part 15 is not tilted downwards, the angle between the restraining surface 11 and the slit 13 is not an acute angle. Therefore, the wall thickness of the portion of the mandible 7 sandwiched between the restrained surface 11 and the slit 13 can be ensured, reducing the possibility of damage to that portion.

[0041] The following explanation is as follows: Figure 13 As shown in the undefined example, the first part 15 is tilted upwards towards the rear end 201b. In this case, the wall thickness of the portion of the mandible 7 that is constrained by the restrained surface 11 and the slit 13 is ensured to be thicker, which can further reduce the possibility of damage to this portion.

[0042] Thus, since the first part 15 tilts upwards towards the rear end 201b, the first part 15 can also be referred to as the "rising part". From the viewpoint of ensuring the wall thickness of the portion of the lower jaw 7 that is bound by the restrained surface 11 and the slit 13, in a side view, the angle formed by the restrained surface 11 and the first part 15 is... It can also be an obtuse angle.

[0043] The second part 17 can also be a portion located on the rear end side of the slit 13, connected to the first part 15. The second part 17 can also be inclined downwards towards the rear end 201b. In this case, when the second part 17 is inclined downwards towards the rear end 201b, the second part 17 can also be referred to as the "descending part".

[0044] When the slit 13 has both a first part 15 and a second part 17, it is possible to prevent the wall thickness of the support 201 between the slit 13 and the upper surface of the support 201 from becoming excessively thin. Therefore, the durability of the support 201 can be improved. For example, when the slit 13 is located only within the head 1 in the direction along the central axis O1, it is possible to prevent the wall thickness of the head 1 between the slit 13 and the upper surface of the maxilla 5 from becoming too thin.

[0045] Furthermore, when the slit 13 is positioned from the head 1 along the direction of the central axis O1 to the handle 3, it is possible to prevent the wall thickness of the handle 3 between the slit 13 and the upper surface of the handle 3 from becoming excessively small.

[0046] When the slit 13 has a first part 15 (rising part 15) and a second part 17 (falling part 17), the second part 17 may be longer than the first part 15. In this case, it is possible to avoid excessive reduction in the wall thickness of the support 201 between the slit 13 and the upper surface of the support 201, and it is also easy to ensure the length of the slit 13. Therefore, the durability of the support 201 can be improved, and the loading and unloading of the blade 301 into the pouch 9 can be easily performed.

[0047] When the slit 13 has an ascending portion 15 and a descending portion 17, the inclination angles of these portions are not limited to specific values. For example... Figure 13 As shown, the tilt angle θ1 of the rising part 15 relative to the central axis O1 when viewed from the side can, for example, be set to 0.2° to 3°. Figure 13 As shown, the tilt angle θ2 of the descending part 17 relative to the central axis O1 when viewed from the side can be set to, for example, 6° to 10°. Furthermore, the tilt angle θ2 can be larger than the tilt angle θ1. Figure 12 The tilt angles θ1 and θ2 are relatively small, therefore in Figure 13 The slit 13, which emphasizes these tilt angles θ1 and θ2, is shown in the figure.

[0048] When the tilt angle of the rising section 15 is constant, this angle can also be evaluated as tilt angle θ1. Furthermore, when the tilt angle of the rising section 15 is not constant, the maximum value of the tilt angle of the rising section 15 can also be evaluated as tilt angle θ1. Similarly, when the tilt angle of the descending section 17 is constant, this angle can also be evaluated as tilt angle θ2. Furthermore, when the tilt angle of the descending section 17 is not constant, the maximum value of the tilt angle of the descending section 17 can also be evaluated as tilt angle θ2.

[0049] In other words, the rising portion 15 can extend in a straight line when viewed from the side, provided that the tilt angle of the rising portion 15 is constant. In this case, the load applied to the rising portion 15 due to the deformation of the head 1 is easily distributed over a large area. Furthermore, it can also be said that the descending portion 17 can extend in a straight line when viewed from the side, provided that the tilt angle of the descending portion 17 is constant. In this case, the load applied to the descending portion 17 due to the deformation of the head 1 is easily distributed over a large area.

[0050] When the slit 13 has a descending portion 17, the lower end of the descending portion 17 can also be located above the lower end of the constraint surface 11. In this case, at least a portion including the lower end of the constraint surface 11 becomes a region in which the slit 13 does not exist rearward along the direction of the central axis O1. Therefore, the cutting load transmitted from the cutting tool 301 to the constraint surface 11, such as back force, can be stably borne by the support 201.

[0051] When the slit 13 is configured from the head 1 along the direction of the central axis O1 to the handle 3, the upper end of the slit 13 can also be located inside the head 1. In this case, it is possible to further avoid excessive reduction in the wall thickness of the support 201 between the slit 13 and the upper surface of the support 201, and it is also easy to ensure the length of the slit 13.

[0052] In such Figure 12 In the undefined example shown, where the upper end of the slit 13 is located below the upper surface of the head 1, it is easier to avoid excessive reduction in the wall thickness of the support 201 between the slit 13 and the upper surface of the support 201.

[0053] The descending portion 17 in the slit 13 may also have a first region 19 and a second region 21. The first region 19 may be a portion located on the front end side of the descending portion 17 and connected to the first portion 15. The second region 21 may be a portion located closer to the rear end 201b than the first region 19 and connected to the first region 19.

[0054] The tilt angle of the first region 19 relative to the central axis O1 when viewed from the side is tilt angle θ21. The tilt angle of the second region 21 relative to the central axis O1 when viewed from the side is tilt angle θ22. Here, tilt angle θ21 can also be greater than tilt angle θ22. In this case, it is easy to ensure that the length of the descending part 17 is relatively long, and it is easy to avoid the rear end of the descending part 17 being excessively located at the bottom. As a result, it is easy to avoid the wall thickness of the support 201 between the slit 13 and the lower surface of the support 201 becoming excessively small.

[0055] When the tilt angle of the first region 19 is constant, this angle can also be evaluated as tilt angle θ21. Furthermore, when the tilt angle of the first region 19 is not constant, the maximum value of the tilt angle of the first region 19 can also be evaluated as tilt angle θ21. Similarly, when the tilt angle of the second region 21 is constant, this angle can also be evaluated as tilt angle θ22. Furthermore, when the tilt angle of the second region 21 is not constant, the maximum value of the tilt angle of the second region 21 can also be evaluated as tilt angle θ22.

[0056] The handle 3 may also have an upper surface 23 and a lower surface 25. In this case, the slit 13 may be located closer to the upper surface 23 than the lower surface 25. During the cutting of the material being cut, a cutting load of the main component force is applied to the lower jaw 7. When the slit 13 is configured as described above, the durability of the support 201 relative to the cutting load of the main component force is improved.

[0057] The size of the bracket 201 is not particularly limited. For example, the length along the central axis O1 can be set to about 80mm to 200mm. In addition, the height from the top to the bottom, or in other words, the width in the vertical direction, can be set to about 10mm to 30mm.

[0058] As a component of the support 201, steel, cast iron, etc. can be used. In particular, when steel is used in these components, the support 201 has high toughness.

[0059] <Blade>

[0060] The blade 301 can be inserted into the pocket 9 of the support 201. The blade 301 is not limited to a specific shape. For example, the blade 301 may also have an upper side 27, a lower side 29, a pair of transverse sides 31, a front end face 33, a rear end face 35, and a cutting edge 37.

[0061] The upper surface 27 is the upper surface of the blade 301 and can also abut against the maxilla 5. The lower surface 29 is the lower surface of the blade 301 and can also abut against the mandibular portion 7. A pair of transverse surfaces 31 can also be surfaces located between the upper surface 27 and the lower surface 29. The upper surface 27, the lower surface 29, and the pair of transverse surfaces 31 can also extend in the direction along the central axis O1.

[0062] The front end face 33 is the face of the cutting tool 301 located on the front end side, and in the cutting tool 101, it may also protrude toward the front end 201a. The rear end face 35 is the face of the cutting tool 301 located on the rear end side, and it may also abut against the constraint face 11 of the support 201.

[0063] The cutting edge 37 can also be located at the intersection of the upper side surface 27 and the front end surface 33. By bringing the cutting edge 37 into contact with the material being cut, cutting can be performed. In addition to the aforementioned location, the cutting edge 37 can also be located at the intersection of the upper side surface 27 and the rear end surface 35. In this case, the insert 301 is referred to as a two-piece insert 301 or a dog-bone insert 301, offering excellent economic benefits.

[0064] The size of the blade 301 is not particularly limited. For example, the length along the central axis O1 can be set to about 15mm to 30mm. In addition, the height from the upper side 27 to the lower side 29, or in other words, the width in the vertical direction, can be set to about 3mm to 10mm.

[0065] Materials used for the 301 cutting tool include, for example, superhard alloys and cermets. Compositions of superhard alloys include, for example, WC-Co, WC-TiC-Co, and WC-TiC-TaC-Co. Here, WC, TiC, and TaC can be hard particles, and Co can be a bonding phase.

[0066] Furthermore, cermets can also be sintered composite materials made by combining metal and ceramic components. Examples of cermets include titanium compounds with titanium carbide (TiC) or titanium nitride (TiN) as the main components. However, the material of the blade 301 is not limited to the above-mentioned compositions.

[0067] The surface of the blade 301 can also be coated using chemical vapor deposition (CVD) or physical vapor deposition (PVD). Examples of coating compositions include titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN), and aluminum oxide (Al2O3).

[0068] <Screw>

[0069] like Figure 2 As in the undefined example shown, the blade 301 can also be fixed to the bracket 201 by a screw 401. For example, a threaded hole can be provided in the upper jaw portion 5 of the bracket 201, and a threaded groove can be provided in the lower jaw portion 7 of the bracket 201. The blade 301 can also be installed in the pouch 9 by inserting the screw 401 into the threaded hole in the upper jaw portion 5 and fixing the screw 401 in the aforementioned threaded groove. Furthermore, the blade 301 can also be installed in the pouch 9 by a so-called self-molding method without using the screw 401. In these cases, it is also possible for the blade 301 to be located inside the pouch 9.

[0070] <Methods for manufacturing machined parts>

[0071] Next, the method for manufacturing a machined object with an undefined side in this disclosure will be described using the accompanying drawings.

[0072] The workpiece 503 is manufactured by machining the workpiece 501. The manufacturing method of the workpiece 503 in this embodiment includes the following steps:

[0073] (1) The process of rotating the workpiece 501.

[0074] (2) The process of bringing the cutting tool 101 represented by the above embodiment into contact with the rotating workpiece 501.

[0075] (3) The process of moving the cutting tool 101 away from the material 501 being cut.

[0076] More specifically, firstly, it can also be like... Figure 14 As shown in the undefined example, the workpiece 501 rotates about axis O2, and the cutting tool 101 is relatively close to the workpiece 501. Next, it is also possible to... Figure 15 As shown in the undefined example, at least a portion of the cutting edge 37 in the cutting tool 101 contacts the workpiece 501, cutting the workpiece 501. Furthermore, it is also possible to... Figure 16 As shown in the undefined example, the cutting tool 101 is positioned relatively away from the material 501 being cut.

[0077] like Figure 14 As in the undefined example shown, the cutting tool 101 can also be moved in the Y1 direction while the shaft O2 is fixed and the material to be cut 501 is rotated, thereby bringing the cutting tool 101 closer to the material to be cut 501.

[0078] In addition, it can also be like Figure 15 As shown in the undefined example, with at least a portion of the part of the blade 301 that serves as the cutting edge 37 in contact with the rotating workpiece 501, the cutting tool 101 moves in the Y2 direction, thereby cutting the workpiece 501.

[0079] In addition, it can also be like Figure 16 As shown in the undefined example, the cutting tool 101 moves in the Y3 direction while the workpiece 501 is rotating, thereby moving the cutting tool 101 away from the workpiece 501.

[0080] In each process, the cutting tool 101 is moved so that it comes into contact with the material 501 being cut, or moves away from the material 501 being cut, but of course it is not limited to this method.

[0081] For example, in step (1), the material to be cut 501 may be brought close to the cutting tool 101. Similarly, in step (3), the material to be cut 501 may be moved away from the cutting tool 101. In the case of continuous cutting, the process of repeatedly bringing at least a portion of the cutting edge 37 in the insert 301 into contact with different parts of the material to be cut 501 may be performed while the material to be cut 501 is kept in a rotating state.

[0082] Representative examples of materials 501 used for cutting include hardened steel, carbon steel, alloy steel, stainless steel, cast iron, or non-ferrous metals.

[0083] 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 foregoing embodiments. 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. In other words, it should be noted that those skilled in the art can easily 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.

[0084] -Explanation of Figure Markers-

[0085] 101··· Cutting Tools

[0086] 201···Staff

[0087] 201a - First End (Front-end)

[0088] 201b - Second End (Back End)

[0089] 301 blade

[0090] 401 screws

[0091] 501···Material to be cut

[0092] 503···Machining workpiece

[0093] 1···head

[0094] 3···Handle

[0095] 5. Maxilla

[0096] 7. Mandible

[0097] 9. Pockets

[0098] 11···Constraint Surface

[0099] 13··· Slit

[0100] 15... Part One (The Rising Part)

[0101] 17···Part 2 (Descent)

[0102] 19··First District

[0103] 21··Second Region

[0104] 23··· Upper surface

[0105] 25··· Lower surface

[0106] 27··· Upper side

[0107] 29··· Lower side

[0108] 31···Horizontal and horizontal side views

[0109] 33···Front end

[0110] 35··· Rear End Face

[0111] 37··· Cutting edge.

Claims

1. A support, which is a rod-shaped support for a cutting tool extending along a central axis from the rear end to the front end. The support has: The head, located on one side of the front end; and The handle is located on the side closer to the rear end than the head. The head has: maxilla; The lower jaw; and A pouch, located between the upper and lower jaws, allows for the insertion of a cutting blade. The lower jaw has a constraint surface that can abut against the end face of the rear end side of the cutting blade. The support also has a slit extending from the constraint surface to the rear end. The slit has: The rising portion connects to the upper end of the constraint surface and tilts upwards as it moves toward the rear end; and The descending section is located near the rear end of the rising section, and slopes downwards towards the rear end. Along the direction of the central axis, the descending portion is longer than the ascending portion.

2. The stent according to claim 1, wherein, The upper end of the slit is located inside the head.

3. The stent according to claim 1 or 2, wherein, The lower end of the slit is located above the lower end of the constraint surface.

4. The stent according to claim 1 or 2, wherein, The angle formed by the constraint surface and the rising part is an obtuse angle.

5. The stent according to claim 1 or 2, wherein, When viewed from the side The maximum value of the inclination of the rising part relative to the central axis is a first inclination angle. The maximum value of the inclination of the descending portion relative to the central axis is the second inclination angle. The second tilt angle is greater than the first tilt angle.

6. The stent according to claim 1 or 2, wherein, The rising portion and the descending portion extend in a straight line, respectively.

7. The stent according to claim 1 or 2, wherein, The descending section has: The first region is located on one side of the front end; and The second region is located near the rear end of the first region. The maximum value of the tilt of the first region relative to the central axis is greater than the maximum value of the tilt of the second region relative to the central axis.

8. The stent according to claim 1 or 2, wherein, The handle has an upper surface and a lower surface. The slit is located closer to the upper surface than the lower surface.

9. A cutting tool, comprising: The stent according to any one of claims 1 to 8; and The cutting blade is located in the pouch within the support.

10. 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 9 into contact with the rotating workpiece; and The process of removing the cutting tool from the material being cut.

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