Cutting tool and method for manufacturing cut workpiece

Abstract

This cutting tool comprises a holder, a cutting member, and an adjustment member. The holder has a pocket having a seating surface, and a through-hole. The cutting member has a first surface, a second surface, a cutting blade, and a first recess. The tip of the adjustment member is inserted into the first recess. The first recess has a first wall surface. The adjustment member has a tapered part that is in contact with the first wall surface and has an outer diameter that decreases toward the tip.

Description

Cutting Tool and Method for Manufacturing Cut Product Cross-Reference to Related Application

[0001] The present application claims priority from Japanese Patent Application No. 2025-056198 filed on March 28, 2025, the entire disclosure of which is incorporated herein by reference.

[0002] The present disclosure relates to a cutting tool used for cutting a workpiece such as metal, and a method for manufacturing a cut product.

[0003] Conventionally, as an example of a positioning mechanism for a cutting insert in an insert-type cutting tool, a positioning mechanism for a cutting insert using a screw and a cutting member as described in Japanese Patent Application Laid-Open No. 56-56318 (Patent Document 1) has been used.

[0004] The cutting tool described in Patent Document 1 has a structure in which the position of the cutting insert fixed on the cutting member is determined by fixing the cutting member with a screw.

[0005] In the cutting tool described in Patent Document 1, the central axis of the tapered hole of the cutting member is parallel to the central axis of the screw. Therefore, when the cutting tool is rotated during cutting, the screw may scatter due to centrifugal force.

[0006] A non-limiting one aspect of the cutting tool of the present disclosure has a disk shape or a columnar shape centered on a rotation axis, and comprises: a holder having a pocket located on an outer peripheral side and provided with a seat surface, and a through hole opened in the seat surface and extending along a central axis inclined with respect to the seat surface; a cutting member located in the pocket; and an adjustment member inserted into the through hole. The cutting member has a first surface facing the seat surface, a second surface located on an opposite side to the first surface, a cutting edge located at an outer edge of the second surface, and a first recess located in the first surface and opening toward the through hole. A tip end of the adjustment member is inserted into the first recess. The first recess has a first wall surface inclined so as to approach the central axis as it moves away from the first surface. The adjustment member has a tapered portion that abuts against the first wall surface, and has an outer diameter that decreases as approaching the tip end.

[0007] This is a perspective view showing a cutting tool from one side of the present disclosure (not limited thereto). This is an enlarged view of area A1 shown in Figure 1. This is a perspective view showing a part of a holder from one side of the present disclosure (not limited thereto). This is a front view of the cutting tool shown in Figure 1, viewed from direction B1. This is an enlarged view of area A2 shown in Figure 4. This is a cross-sectional view taken along the line VI-VI shown in Figure 5. This is a cross-sectional view taken along the line VII-VII shown in Figure 5. This is a view of a cutting tool from one side of the present disclosure (not limited thereto), viewed from the same field of view as Figure 7. This is a side view of the cutting tool shown in Figure 1, viewed from direction B2. This is an enlarged view of area A3 shown in Figure 9. This is a cross-sectional view taken along the line XI-XI shown in Figure 9. This is an enlarged view of area A4 shown in Figure 11. This is a perspective view showing a cutting member (cartridge) from one side of the present disclosure (not limited thereto). This is a side view of the cutting member shown in Figure 13, viewed from direction C1. This is a front view of the cutting member shown in Figure 13, viewed from direction C2. This is a perspective view of the cutting member shown in Figure 13, viewed from direction C3. This is a cross-sectional view taken along the line XVII-XVII shown in Figure 15. This is a schematic diagram showing a method for adjusting a cutting member using an adjustment member in the present disclosure. This is a schematic diagram showing a method for adjusting a cutting member using an adjustment member in this disclosure. This is a schematic diagram showing one step in a method for manufacturing a cut workpiece, an example not limited to this disclosure. This is a schematic diagram showing one step in a method for manufacturing a cut workpiece, an example not limited to this disclosure. This is a schematic diagram showing one step in a method for manufacturing a cut workpiece, an example not limited to this disclosure.

[0008] The cutting tool 1 of this disclosure will be described in detail below with reference to the drawings. However, for the sake of clarity, the drawings referenced below show only the main components necessary to explain the cutting tool 1 of the embodiment in a simplified manner. Therefore, the cutting tool 1 of this disclosure may include any components not shown in the drawings referenced. Also, the dimensions of the components in each drawing do not faithfully represent the dimensions of the actual components or the dimensional ratios of each component. This disclosure is not limited to the following embodiments.

[0009] As shown in the examples not limited to Figures 1, 4, and 9, the cutting tool 1 may include a holder 100, a cutting member 200, and an adjustment member 300.

[0010] The holder 100 may be disc-shaped or cylindrical around the rotation axis R. Specifically, as shown in the example shown in Figure 1, the holder 100 may be disc-shaped extending along the rotation axis R. In other words, the holder 100 may be a so-called side cutter holder. The holder 100 is not limited to a disc shape. For example, the holder 100 of the cutting tool 1 may be a so-called face mill holder.

[0011] The holder 100 is rotatable around the rotation axis R. In the example shown in Figure 1, which is not limited to this case, the counterclockwise direction corresponds to the direction of rotation (see Figure 20). Furthermore, the holder 100 is not limited to a specific size.

[0012] For example, in the case of a disc shape, the width (thickness) of the holder 100 in the direction along the rotation axis R may be set to about 10 to 30 mm. The width (diameter) of the holder 100 in the direction perpendicular to the rotation axis R may be set to about 80 to 315 mm. In the case of a cylindrical shape, the width (thickness) of the holder 100 in the direction along the rotation axis R and the width (diameter) of the holder 100 in the direction perpendicular to the rotation axis R do not have to fall within the above ranges.

[0013] Furthermore, steel, cast iron, or other materials may be used as components of the holder 100. In particular, when steel is used among these components, the toughness of the holder 100 is high.

[0014] As shown in the example not limited to Figure 3, the holder 100 may have a pocket 101 and a through hole 103. As shown in the example not limited to Figures 2, 5 and 10, the pocket 101 may be the location of the cutting member 200 and the clamp member 400, which will be described later. In Figure 2 and the like, the members denoted by reference numerals 200a, 200b and 200c, which will be described later, correspond to the cutting member 200.

[0015] As shown in the example not limited to Figure 3, the pocket 101 may be located on the outer circumference side of the holder 100. The pocket 101 may open on the outer circumference side of the holder 100. There may be only one pocket 101 or there may be multiple pockets 101. When the holder 100 has multiple pockets 101, these pockets 101 may be located at equal intervals around the rotation axis R or at unequal intervals. When there are multiple pockets 101, the number of pockets 101 may be about 2 to 12.

[0016] Furthermore, the pocket 101 may have a seating surface 105. The seating surface 105 may be a flat surface. The seating surface 105 may be the surface on which the cutting member 200 is located. The seating surface 105 may face forward in the direction of rotation.

[0017] As shown in the example shown in Figure 3, the through hole 103 may open on the seating surface 105. Alternatively, as shown in the example shown in Figure 2, the through hole 103 may open on the outer circumferential surface of the holder 100.

[0018] As shown in the example (not limited to) in Figures 11 and 12, the through hole 103 may extend along the central axis L. The central axis L may be inclined with respect to the seating surface 105. In other words, the through hole 103 may be inclined with respect to the seating surface 105. In this case, the central axis L may be inclined at an angle of approximately 60 to 80° with respect to the seating surface 105.

[0019] The central axis L may intersect with the midpoint of the width of the seating surface 105 in the first direction D1. When the central axis L intersects with the midpoint of the width of the seating surface 105 in the first direction D1, the widths of the seating surfaces 105 at symmetrical positions across the through hole 103 become the same in the first direction D1. Therefore, the strength of the holder 100 is more easily ensured. The first direction D1 is a direction along the rotation axis R, as shown in the example shown in Figure 1, which is not limited to this case.

[0020] As shown in the example not limited to Figures 2 and 5, the cutting member 200 may be located in the pocket 101. The cutting member 200 may be formed as a single integral member, or it may be formed from multiple members. In the example not limited to Figure 10, the cutting member 200 consists of three members: a cutting insert 200a (insert 200a), a cartridge 200b, and a fastening screw 200c. The insert 200a is attached to the cartridge 200b by the fastening screw 200c.

[0021] When the cutting member 200 is formed as a single unit, the material of the cutting member 200 or insert 200a may be, for example, cemented carbide, cermet, or an inorganic material such as ceramic. Examples of cemented carbide compositions include WC (tungsten carbide)-Co, WC-TiC (titanium carbide)-Co, and WC-TiC-TaC (tantalum carbide)-Co. WC, TiC, and TaC are hard particles, and Co is the bonding phase. Cermet is a sintered composite material formed by combining a metal with a ceramic component. Specifically, examples of cermets include compounds mainly composed of TiC or TiN (titanium nitride). However, the material of the cutting member 200 or insert 200a is not limited to these.

[0022] Furthermore, if the cutting member 200 is formed as an integral part, the surface of the cutting member 200 or the insert 200a may be coated with a coating layer by chemical vapor deposition (CVD) or physical vapor deposition (PVD). Examples of materials for the coating layer include aluminum oxide (alumina), titanium carbides, nitrides, oxides, carbonites, nitrogen oxides, and carbonitroxides. The coating layer may contain only one of the above substances, or it may contain multiple substances. The coating layer may also consist of only one layer, or it may be a configuration of multiple layers stacked together. The material of the coating layer is not limited to these.

[0023] In the example shown in Figure 10, which is not limited to this design, the insert 200a is rectangular in shape, but the insert 200a is not limited to any particular shape. For example, the insert 200a may be a polygonal plate shape such as a triangular plate, a pentagonal plate, a hexagonal plate, or an octagonal plate.

[0024] Steel, cast iron, or the like may be used as the material for the cartridge 200b and / or the fastening screw 200c. In particular, when steel is used among these materials, the toughness of the cartridge 200b and / or the fastening screw 200c is high.

[0025] As shown in Figures 5 and 13-16, the cutting member 200 may have a first surface 201, a second surface 203, a cutting edge 205, and a first recess 207. The first surface 201 may face the seating surface 105 of the holder 100. The second surface 203 may be located on the opposite side of the first surface 201.

[0026] In the example shown in Figures 5 and 13-16, the first surface 201 is the surface of the cartridge 200b facing the seat surface 105. The second surface 203 is the combined surface of the insert 200a and the cartridge 200b located on the opposite side of the first surface 201.

[0027] As shown in the example not limited to Figure 5, the cutting edge 205 may be located on the outer edge of the second surface 203. In other words, the cutting edge 205 may be located on the side of the second surface 203 that is furthest from the axis of rotation R. In the example not limited to Figure 5, the cutting edge 205 is the cutting edge portion of the insert 200a.

[0028] As shown in the example not limited to Figure 15, the first recess 207 may be located on the first surface 201. Furthermore, the first recess 207 may open toward the through hole 103. In other words, the extension of the central axis L may intersect the first recess 207.

[0029] As shown in the example (not limited to) in Figures 15 and 16, the first recess 207 may have a first wall surface 207a. As shown in the example (not limited to) in Figures 7, 8 and 16, the first wall surface 207a may be inclined to approach the central axis L as it moves away from the first surface 201. The first wall surface 207a may be in contact with the adjustment member 300.

[0030] As shown in the example not limited to Figure 12, the adjustment member 300 may extend from a tip 300a to a rear end 300b. The adjustment member 300 may be inserted into the through hole 103. In this case, the tip 300a of the adjustment member 300 may be inserted into the first recess 207.

[0031] The adjustment member 300 is not limited to a specific shape. For example, as shown in the unlimited example in Figures 7 and 8, the adjustment member 300 may be a screw. If the adjustment member 300 is a screw, screw threads may be formed on the outer circumferential surface of the adjustment member 300. In addition, a screw groove that engages with the screw threads on the outer circumferential surface of the adjustment member 300 may be formed on the inner circumferential surface of the through hole 103. Note that in Figures 7 and 8, a cross-section is shown that includes the central axis L and is parallel to the rotation axis R.

[0032] Steel, cast iron, or other materials may be used as the material for the adjustment member 300. In particular, when steel is used among these materials, the toughness of the adjustment member 300 is high.

[0033] As shown in the example (not limited) in Figures 7 and 8, the adjustment member 300 may have a tapered portion 301. The outer diameter of the tapered portion 301 may decrease as it approaches the tip 300a. In this case, the shape of the tapered portion 301 is not particularly limited. As shown in the example (not limited) in Figure 7, the tapered portion 301 may be linear in a cross section (first cross section S1) that passes through the through hole 103 and the first recess 207 along the central axis L and is parallel to the rotation axis R. Also, as shown in the example (not limited) in Figure 8, the tapered portion 301 may be a convex curve that bulges toward the first recess 207 in the first cross section S1.

[0034] Furthermore, the first wall surface 207a is not limited to a specific shape. In the first cross-section S1, the first wall surface 207a may be a straight line or a curved line. In the example shown in Figures 7 and 8, the first wall surface 207a is a straight line. When the first wall surface 207a is a straight line in the first cross-section S1, the amount by which the cutting member 200 moves tends to be constant with respect to the amount by which the adjustment member 300 is moved, making it easier to adjust the position of the cutting edge 205 in the cutting tool 1.

[0035] As shown in the example without limitation in Figures 7 and 8, the tapered portion 301 may be in contact with the first wall surface 207a of the first recess 207. Both the first wall surface 207a and the tapered portion 301 are inclined surfaces. Therefore, when the tapered portion 301 is in contact with the first wall surface 207a and the adjustment member 300 is moved away from the outer circumference of the holder 100, the cutting member 200 moves in the first direction D1. In the example without limitation in Figure 18, the adjustment member 300 is moved in the X1 direction while the tapered portion 301 is in contact with the first wall surface 207a.

[0036] In other words, when the threads on the outer circumference of the adjustment member 300 are engaged with the thread grooves of the through hole 103, rotating the adjustment member 300 moves the adjustment member 300 in the X1 direction, causing the cutting member 200 to move in the Y1 direction along the first direction D1. In this way, the position of the cutting edge 205 can be adjusted by moving the cutting member 200. Note that Figure 18 is a cross-sectional view corresponding to Figure 7, and the holder 100, cutting member 200, and adjustment member 300 are shown in the same cross-section.

[0037] When moving the adjustment member 300 away from the outer circumference of the holder 100, a work tool 600 may be used to move the adjustment member 300. The work tool 600 is not limited to a specific shape and may be shaped to match the adjustment member 300. For example, if the adjustment member 300 is a screw, the work tool 600 may be a screwdriver or wrench suitable for the shape of the screw head of the adjustment member 300.

[0038] As shown in the example (not limited to) in Figure 12, the central axis L is inclined with respect to the seating surface 105. When the cutting tool 1 rotates around the rotation axis R, centrifugal force acts on each component in a radial direction with respect to the rotation axis R. As shown in the example (not limited to) in Figure 12, because the central axis L is inclined with respect to the seating surface 105, the through hole 103 extends in a direction different from the direction in which the centrifugal force acts. In other words, as shown in the example (not limited to) in Figure 11, the rotation axis R is not located on the extension of the central axis L. Therefore, the adjustment member 300 inserted into the through hole 103 is less affected by centrifugal force. For these reasons, when the cutting tool 1 has the above configuration, the adjustment member 300 is less likely to scatter from the through hole 103 during cutting.

[0039] Figures 7 and 8 are cross-sectional views of the first section S1. As shown in the example not limited to Figures 7 and 8, the center of the opening of the first recess 207 may be defined as center C. Center C may be a point that satisfies the following definition.

[0040] As shown in the example not limited to Figure 15, in a front view of the first surface 201, the midpoint M1 of the first width W1 and the midpoint M2 of the second width W2 in the first recess 207 may be taken. The intersection of a virtual line passing through midpoint M1 and parallel to the second width W2, and a virtual line passing through midpoint M2 and parallel to the first width W1, may be the center C.

[0041] The first width W1 may be the width of the opening of the first recess 207 in the first direction D1. The second width W2 may be the width of the opening of the first recess 207 in the direction perpendicular to the first width W1.

[0042] As shown in the example (not limited to) in Figures 7 and 8, the central axis L may be located closer to the first wall surface 207a than to the center C. In other words, in the first direction D1, the central axis L may be located between the first wall surface 207a and the center C.

[0043] Furthermore, the distance from the first wall surface 207a to the center C and the distance from the first wall surface 207a to the central axis L may be evaluated with any point on the opening where the first wall surface 207a is located among the openings of the first recess 207 as a reference point. Specifically, evaluation may be performed by comparing the shortest distance from the reference point to the center C and the shortest distance from the reference point to the central axis L.

[0044] When the central axis L is positioned closer to the first wall surface 207a than the center C, only one side of the adjustment member 300 is likely to abut against the first recess 207. Specifically, among the tapered portion 301 of the adjustment member 300, only the portion closer to the first wall surface 207a than the central axis L is likely to abut against the first wall surface 207a. That is, when the cutting member 200 moves due to the abutment between the tapered portion 301 and the first wall surface 207a, abutment other than between the portions of the tapered portion 301 and the first wall surface 207a that are related to the movement of the cutting member 200 is less likely to occur. Therefore, the cutting member 200 tends to move smoothly.

[0045] For the above reasons, when the cutting tool 1 has the above configuration, the cutting member 200 is easy to move, and the position of the cutting edge 205 is easy to adjust.

[0046] Furthermore, as in a non-limiting example shown in FIGS. 7 and 8, the central axis L may intersect the first wall surface 207a. If the central axis L does not intersect the first wall surface 207a, the distance from the tapered portion 301 to the first wall surface 207a tends to increase, making it difficult for the tapered portion 301 to contact the first wall surface 207a.

[0047] When the central axis L intersects the first wall surface 207a, the distance from the tapered portion 301 to the first wall surface 207a tends to decrease, making it easier for the tapered portion 301 to contact the first wall surface 207a. Therefore, compared with the case where the central axis L does not intersect the first wall surface 207a, the cutting member 200 is easier to move, and the position adjustment of the cutting edge 205 in the cutting tool 1 is easier.

[0048] As shown in the example without limitation in Figures 7 and 8, the angle between the central axis L and the tapered portion 301 in the first cross section S1 may be defined as the first angle θ1, and the angle between the central axis L and the first wall surface 207a may be defined as the second angle θ2. When evaluating the first angle θ1, the tapered portion 301 on the side that abuts the first wall surface 207a may be used for evaluation.

[0049] If the central axis L and the tapered portion 301 do not intersect, the angle formed by the extensions of the central axis L and the tapered portion 301 may be defined as the first angle θ1. In the first cross-section S1, if the tapered portion 301 is curved, the angle formed by the tangent to the tapered portion 301 and the central axis L may be defined as the first angle θ1. Also, if the central axis L and the first wall surface 207a do not intersect, the angle formed by the extensions of the central axis L and the first wall surface 207a may be defined as the second angle θ2.

[0050] As shown in the example not limited to Figures 7 and 8, the first angle θ1 may be larger than the second angle θ2. When the cutting tool 1 has the above configuration, the region on the side of the rear end 300b of the tapered portion 301 is more likely to come into contact with the first wall surface 207a, making it easier to move the cutting member 200. Therefore, it is easier to adjust the position of the cutting edge 205 in the cutting tool 1. Note that the region on the side of the rear end 300b of the tapered portion 301 may mean the region of half the length of the tapered portion 301 in the direction along the central axis L that is closest to the rear end 300b.

[0051] As shown in the example (not limited to) in Figures 13-16, the cutting member 200 may have a protrusion 209. As shown in the example (not limited to) in Figure 5, the protrusion 209 may project from the first surface 201 toward the seat surface 105.

[0052] As shown in the example (not limited to) in Figures 3 and 5, the pocket 101 may have a groove 107. The groove 107 may be recessed in a direction away from the cutting member 200. The groove 107 may extend along the first direction D1 on the seating surface 105.

[0053] The groove 107 may or may not penetrate the seating surface 105 in the direction along the first direction D1. In the example shown in Figure 3, the groove 107 penetrates the seating surface 105 in the direction along the first direction D1. When the groove 107 penetrates the seating surface 105 in the direction along the first direction D1, the cutting member 200 is easier to attach to the holder 100.

[0054] As shown in the unlimited examples in Figures 2 and 5, the protrusion 209 and the groove 107 may be interlocking. Therefore, the protrusion 209 and the groove 107 are not limited to a specific shape as long as they are interlocking. For example, in the unlimited examples shown in Figures 13 to 16, the protrusion 209 protrudes from the first surface 201 in a rectangular parallelepiped shape. Also, in the unlimited example shown in Figure 3, the groove 107 has a shape as if the seat surface 105 has been hollowed out in a rectangular parallelepiped shape to match the shape of the protrusion 209.

[0055] Because the protrusion 209 and the groove 107 can be fitted together, the cutting member 200 moves more easily along the groove 107 when the position of the cutting member 200 is adjusted with the adjustment member 300. Therefore, the cutting member 200 is less likely to rotate when the position of the cutting member 200 is adjusted with the adjustment member 300.

[0056] For the reasons stated above, when the cutting tool 1 has the above configuration, the position of the cutting member 200 is easily adjusted. Therefore, the position of the cutting edge 205 in the cutting tool 1 is easily adjusted.

[0057] As shown in the example (not limited to) in Figure 3, the groove 107 may extend parallel to the axis of rotation R. Note that "parallel" is not limited to a strict sense. For example, the groove 107 may be inclined at about 5° with respect to the axis of rotation R.

[0058] When the cutting tool 1 has the above configuration, the direction of movement of the cutting member 200 is limited to a direction parallel to the rotation axis R, making it easy to adjust the position of the cutting member 200. Therefore, it is easy to adjust the position of the cutting edge 205 in the cutting tool 1.

[0059] As shown in the example (not limited to) in Figures 1 and 2, the cutting tool 1 may include a clamping member 400. The clamping member 400 may be located on the side of the second surface 203 of the cutting member 200. Furthermore, the clamping member 400 may be located in the pocket 101. In other words, the cutting member 200 and the clamping member 400 may be located in the pocket 101.

[0060] The clamp member 400 may be attached to the holder 100. In this case, the method of attaching the clamp member 400 to the holder 100 is not particularly limited. In the example shown in Figures 1 and 2, the clamp member 400 is attached to the holder 100 by a screw.

[0061] As shown in the example not limited to Figure 5, the clamp member 400 may have a first portion 401. The first portion 401 may be inclined to move away from the seating surface 105 as it approaches the rotation axis R. Furthermore, the second surface 203 may have a first region 203a that is inclined to move away from the seating surface 105 as it approaches the rotation axis R.

[0062] As shown in the example not limited to Figure 5, the first portion 401 may abut against the first region 203a. Because the first portion 401 abuts against the first region 203a, when the clamp member 400 is attached to the holder 100, the clamp member 400 can easily pull the cutting member 200 toward the rotation axis R. Therefore, when the cutting tool 1 has the above configuration, the position-adjusted cutting member 200 is fixed, making it easier to perform stable cutting.

[0063] The clamp member 400 may be used to fix the position of the cutting member 200. For example, after adjusting the position of the cutting member 200, the clamp member 400 may be attached to fix the cutting member 200 in place.

[0064] As shown in the example not limited to Figure 3, the holder 100 may have a second recess 109. The second recess 109 may open toward the pocket 101. Furthermore, the second recess 109 may be recessed toward the direction away from the pocket 101.

[0065] As shown in the example (not limited to) in Figures 6 and 17, the cutting member 200 may have a hole 211. The hole 211 may be located closer to the axis of rotation R than the cutting edge 205. Furthermore, the hole 211 may open toward the second recess 109. That is, the opening of the hole 211 and the opening of the second recess 109 may face each other.

[0066] As shown in the example (not limited) in Figures 6 and 12, the cutting tool 1 may include a plunger 500. The plunger 500 may be inserted into the hole 211. As shown in the example (not limited) in Figure 17, the plunger 500 may have a body portion 501 and a projection portion 503. The projection portion 503 may be positioned so that a portion of it protrudes from the body portion 501. Note that the body portion 501 and the projection portion 503 are not limited to a specific shape.

[0067] As shown in the example (not limited to) in Figure 6, the protrusion 503 may abut against the second recess 109. When the cutting member 200 is placed in the pocket 101, the protrusion 503 abutting against the second recess 109 makes it easier to see that the cutting member 200 has been placed in its initial position. Also, when the cutting member 200 is returned from the adjusted position to its initial position, the protrusion 503 abutting against the second recess 109 makes it easier to return the cutting member 200 to its initial position.

[0068] For the reasons stated above, when the cutting tool 1 has the above configuration, it becomes easier to adjust the position of the cutting member 200. Therefore, it becomes easier to adjust the position of the cutting edge 205 in the cutting tool 1.

[0069] As shown in the example not limited to Figure 3, the holder 100 may have a back surface 111. The back surface 111 may be adjacent to the seat surface 105. The seat surface 105 and the back surface 111 may be directly connected, or they may be connected via a connecting part. In the example not limited to Figure 3, the seat surface 105 and the back surface 111 are connected via a connecting part. Connecting them via a connecting part makes it easier to smoothly connect the seat surface 105 and the back surface 111, and tends to increase the strength of the holder 100.

[0070] As shown in the example (not limited to) in Figures 3 and 6, the second recess 109 may open on the back surface 111. When the cutting tool 1 has the above configuration, the holder 100 is not excessively machined, and the strength of the holder 100 is easily ensured.

[0071] As shown in the example not limited to Figure 6, if the second recess 109 is open on the back surface 111, the hole 211 may be open on the surface of the cutting member 200 facing the back surface 111. When the cutting member 200 has the above configuration, the hole 211 is open on a surface different from the first recess 207, making it easier to ensure the strength of the cutting member 200.

[0072] As shown in the example (not limited to) in Figures 3 and 6, the second recess 109 may have a second wall surface 109a. The second wall surface 109a may be inclined with respect to the back surface 111.

[0073] As shown in the example not limited to Figure 6, the projection 503 may abut against the second wall surface 109a. Also, Figure 6 is a cross-section passing through the second recess 109 and parallel to the seat surface 105. In this cross-section, the second wall surface 109a may be straight. When the cutting tool 1 has the above configuration, the projection 503 easily slides against the second recess 109 when adjusting the position of the cutting member 200. Therefore, it is easy to adjust the position of the cutting edge 205 in the cutting tool 1.

[0074] The position adjustment of the cutting member 200 is not limited to the above mechanism, such as the example shown in Figure 18. For example, the working tool 600 may also serve as the adjustment member 300, as shown in the example shown in Figure 19. In the following description, the working tool 600 may be used synonymously with the adjustment member 300.

[0075] In the example shown in Figure 19, which is not limited to this case, the tip of the work tool 600 has a tapered portion 601 with threads on its outer surface. This tapered portion 601 corresponds to the tip 300a of the adjustment member 300. The position of the cutting member 200 may be adjusted by directly contacting the tapered portion 601 of the work tool 600 with the first wall surface 207a of the cutting member 200.

[0076] Specifically, in the example shown in Figure 19, the working tool 600 is moved in the X2 direction while the tapered portion 601 of the working tool 600 is in contact with the first wall surface 207a. In other words, when the working tool 600 is rotated about the central axis L while the threads of the tapered portion 601 and the thread grooves of the through hole 103 are engaged, the cutting member 200 moves in the Y2 direction along the first direction D1. In this way, the cutting member 200 may be made movable by inserting the adjustment member 300 (working tool 600) into the through hole 103 and pressing the first wall surface 207a with the adjustment member 300 (working tool 600).

[0077] The cutting member 200 after movement may be restrained by the clamp member 400. When the cutting tool 1 has the above configuration, it is easy to adjust the position of the cutting edge 205 in the cutting tool 1.

[0078] <Method for Manufacturing Machined Workpieces> Next, a method for manufacturing machined workpieces according to an embodiment not limited to the present disclosure will be described.

[0079] A machined workpiece can be produced by cutting the workpiece 701. The method for manufacturing a machined workpiece in an embodiment using the cutting tool 1 of the present disclosure may include the following steps: (1) a step of rotating the cutting tool 1 around a rotation axis R; (2) a step of bringing the cutting tool 1 into contact with the workpiece 701; and (3) a step of moving the cutting tool 1 away from the workpiece 701.

[0080] More specifically, as shown in the example without limitation in Figure 20, the cutting tool 1 may be brought relatively closer to the workpiece 701 while rotating in the X3 direction around the rotation axis R. Next, as shown in the example without limitation in Figure 21, the cutting edge 205 of the rotating cutting tool 1 may be brought into contact with the workpiece 701 to cut the workpiece 701. Then, as shown in the example without limitation in Figure 22, the cutting tool 1 may be moved relatively further away from the workpiece 701.

[0081] In the example shown in Figure 20, the workpiece 701 is fixed and the cutting tool 1 is rotated in the X3 direction around the rotation axis R, and the cutting tool 1 is moved in the Y3 direction to bring it closer to the workpiece 701. In the example shown in Figure 22, the workpiece 701 is fixed and the cutting tool 1 is moved away. In the cutting process in the manufacturing method of the embodiment, the workpiece 701 is fixed and the cutting tool 1 is moved in each step, but of course, the method is not limited to these configurations.

[0082] For example, in step (1), the workpiece 701 may be brought closer to the cutting tool 1. Similarly, in step (3), the workpiece 701 may be moved away from the cutting tool 1. If the cutting process is to be continued, the cutting tool 1 may be kept rotating, and the process of bringing the cutting edge 205 of the cutting tool 1 into contact with different parts of the workpiece 701 may be repeated.

[0083] Examples of materials for the workpiece 701 include carbon steel, alloy steel, stainless steel, cast iron, and non-ferrous metals.

[0084] 1...Cutting tool 100...Holder 101...Pocket 103...Through hole 105...Seat surface 107...Groove 109...Second recess 109a...Second wall surface 111...Back surface 200...Cutting member 200a...Cutting insert (insert) 200b...Cartridge 200c...Fastening screw 201...First surface 203...Second surface 203a...First area 205...Cutting edge 207...First recess 207a...First wall surface 209...Protrusion 211...Hole 300...Adjustment member 301...Tapered section 400...Clamping member 401...First part 500...Plunger 501...Main body 503...Protruding part 600...Working tool 601...Tapered shape section 701...Workpiece L...Center axis R... Rotation axis

Claims

1. A cutting tool comprising: a holder having a disc-shaped or cylindrical shape centered on a rotation axis, located on the outer circumference side and having a seating surface; a holder having a through hole opening in the seating surface and extending along a central axis inclined with respect to the seating surface; a cutting member located in the pocket; and an adjustment member inserted into the through hole, wherein the cutting member has a first surface facing the seating surface, a second surface located on the opposite side of the first surface, a cutting edge located on the outer edge of the second surface, and a first recess located on the first surface and opening toward the through hole; the adjustment member having a tip inserted into the first recess, the first recess having a first wall surface that inclins to approach the central axis as it moves away from the first surface; and the adjustment member having a tapered portion that abuts against the first wall surface and whose outer diameter decreases as it approaches the tip.

2. The cutting tool according to claim 1, wherein the central axis is located closer to the first wall surface than the center of the opening of the first recess.

3. The cutting tool according to claim 2, wherein the central axis intersects the first wall surface.

4. The cutting tool according to any one of claims 1 to 3, wherein, in a cross section along the central axis passing through the through hole and the first recess and parallel to the axis of rotation, the angle between the central axis and the tapered portion is greater than the angle between the central axis and the first wall surface.

5. The cutting tool according to any one of claims 1 to 4, wherein the cutting member has a protrusion projecting from the first surface toward the seating surface, the pocket has a groove recessed toward away from the cutting member, and the protrusion and the groove are fit together.

6. The cutting tool according to claim 5, wherein the groove extends parallel to the axis of rotation.

7. The cutting tool according to any one of claims 1 to 6, further comprising a clamp member located on the side of the second surface of the cutting member and located in the pocket, wherein the clamp member has a first portion that is inclined to move away from the seating surface as it approaches the axis of rotation, the second surface has a first region that is inclined to move away from the seating surface as it approaches the axis of rotation, and the first portion abuts against the first region.

8. The cutting tool according to any one of claims 1 to 7, wherein the holder has a second recess that opens toward the pocket and is recessed toward the direction away from the pocket, the cutting member has a hole that is located closer to the axis of rotation than the cutting edge and opens toward the second recess, and further comprises a plunger inserted into the hole, the plunger has a projection, the projection abuts against the second recess.

9. The cutting tool according to claim 8, wherein the holder has a back surface adjacent to the seating surface, and the second recess opens on the back surface.

10. The cutting tool according to claim 9, wherein the second recess has a second wall surface inclined with respect to the back surface, the protrusion abuts against the second wall surface, and in a cross section passing through the second recess and parallel to the seat surface, the second wall surface is straight.

11. A cutting tool comprising: a holder having a disc-shaped or cylindrical shape centered on a rotation axis, located on the outer circumference side and having a seating surface; a holder having a through hole opening in the seating surface and extending along a central axis inclined with respect to the seating surface; a cutting member located in the pocket; and a clamp member located in the pocket and capable of restraining the cutting member, wherein the cutting member has a first surface facing the seating surface; a second surface located on the opposite side of the first surface; a cutting edge located on the outer edge of the second surface; and a first recess located on the first surface and opening toward the through hole, the first recess having a first wall surface that inclins to approach the central axis as it moves away from the first surface, and the cutting member is movable by inserting an adjustment member into the through hole and pressing the first wall surface by the adjustment member.

12. A method for manufacturing a machined workpiece, comprising the steps of: rotating a cutting tool according to any one of claims 1 to 11 around the rotation axis; bringing the cutting tool into contact with a workpiece; and separating the cutting tool from the workpiece.

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