Cutting tool holder, cutting tool and method for producing a cut product

Abstract

A cutting tool holder (1), comprising: a body (2) in a rod shape, which extends from a first end (2a) to a second end (2b) along a first, central axis (S2), and a flow path (4) which is arranged within the body (2) and is configured to allow a coolant to flow, wherein the body (2) exhibits an upper surface (21), a lower surface (22) which is arranged opposite to the upper surface (21), an end surface (23) which is arranged on one side of the first end (2a) between the upper surface (21) and the lower surface (22), an upper claw (261) and a lower claw (262) which are arranged on one side of the first end (2a), and a pocket (3) which is arranged between the upper claw (261) and the lower claw (262), the end surface (23) a first end surface (231) which is positioned lower than the pocket (3) and extends to approach the second end (2b) as it moves away from the pocket (3), a second end face (232) which is positioned lower than the first end face (231) and extends away from the second end (2b), and a groove (5), at least part of which is arranged on the first end face (231) and extends in a direction from bottom to top, the flow path (4) has a first flow path (41) which extends in a direction from bottom to top along a second, central axis (S41) and is open in the second end surface (232), in a cross-section which is orthogonal to the lower surface (22) and has the first flow path (41), a first angle (Θ1) formed by the first end surface (231) and the first central axis (S2) is smaller than a second angle (Θ2) formed by the second central axis (S41) and the first central axis (S2), and a fifth angle (Θ5), which is formed by the groove (5) and the first central axis (S2), is equal to the second angle (Θ2).

Description

Technical area

[0001] The present disclosure relates to a cutting tool holder, a cutting tool and a method for manufacturing a cut product. background

[0002] Numerous cutting tools having a coolant supply mechanism have been conventionally proposed, as described in JP 2004522599 A and JP 5199274 B2.

[0003] Furthermore, from US 2002 / 0 122 698 A1 a cutting tool holder is known, comprising: a body in a rod shape which extends from a first end to a second end along a first central axis, and a flow path which is arranged within the body and is adapted to allow a coolant to flow, wherein a single claw is arranged on one side of the first end.

[0004] In addition, another cutting tool holder is known from JP 5 199 274 B2.

[0005] It is an object of the present invention to enable improved cooling during cutting processes. Brief explanation

[0006] The object is achieved by a cutting tool holder having the features of claim 1. The object is further achieved by a cutting tool holder having the features of claim 3. The object is further achieved by a cutting tool having the features of claim 13. The object is additionally achieved by a method of producing a cut product having the features of claim 14. Further embodiments of the cutting tool holder are described in the dependent claims. Short description of the drawings Fig. 1 is a perspective view showing a cutting tool holder in one of the embodiments of the present disclosure, Fig. Fig. 2 is a perspective view showing a state in which a flow path and the like of the cutting tool holder in the Fig. 1 are translucent, Fig. 3 is an enlarged view of a side of a first end of the cutting tool holder shown in the Fig. 2 is shown, Fig. 4 is a side view of the cutting tool holder shown in the Fig. 1 is shown, Fig. Figure 5 is an enlarged view of one side of the first end of the cutting tool holder shown in the Fig. 4 is shown, Fig. 6 is a side view of the cutting tool holder shown in the Fig. 2 is shown, Fig. Figure 7 is an enlarged view of one side of the first end of the cutting tool holder shown in the Fig. 6 is shown, Fig. Fig. 8 is a sectional view orthogonal to a lower surface of the cutting tool holder shown in the Fig. 7, and has a first flow path, Fig. 9 is a view taken from a direction Y in the Fig. 6 is considered, Fig. 10 is a sectional view orthogonal to a second central axis of the cutting tool holder shown in the Fig. 9 and has a groove, Fig. 11 is a sectional view orthogonal to the second central axis of the cutting tool holder shown in the Fig. 9 and has a first flow path, Fig. Fig. 12 is a diagram showing a state viewed in a direction toward the first end in the cutting tool holder shown in the Fig. 1 is shown, Fig. 13 is a partial enlarged view of the cutting tool holder shown in the Fig. 12 is shown, Fig. 14 is a plan view of the cutting tool holder used in the Fig. 1 is shown, Fig. 15 is a perspective view showing a cutting tool in one of the embodiments of the present disclosure, Fig. Figure 16 is an enlarged view of one side of the first end of the cutting tool shown in the Fig. 15 is shown, Fig. 17 is a side view of the cutting tool used in the Fig. 15 is shown, Fig. Fig. 18 is a diagram showing a state viewed toward the first end in the cutting tool shown in the Fig. 15 is shown, Fig. 19 is a plan view of the cutting tool used in the Fig. 15 is shown, Fig. 20 is a schematic diagram showing one of the steps in a method for manufacturing a cut product in one of the embodiments of the present disclosure, Fig. 21 is a schematic diagram showing one of the steps in the method for manufacturing a cut product in one of the embodiments of the present disclosure, and Fig. 22 is a schematic diagram showing one of the steps in the method for manufacturing a cut product in one of the embodiments of the present disclosure. Design optionsCutting tool holder

[0007] The cutting tool holders in various embodiments of the present disclosure are described below in detail with reference to the drawings. For descriptive purposes, each of the following referenced drawings shows, in a simplified form, only major elements necessary for describing the embodiments. Therefore, the cutting tool holders of the present disclosure are capable of including any structural elements not shown in the referenced drawings. Dimensions of the elements in each of the drawings are not those that faithfully show dimensions of actual structural elements and dimensional relationships of these elements. These points also apply to a cutting tool and a method for manufacturing a cut product, which will be described later.

[0008] As it is in the Fig. As shown in Figures 1 to 14, the cutting tool holder 1 (hereinafter also referred to as "the holder 1") in one embodiment is for use with grooving tools. The holder 1 has a body 2 and a flow path 4. However, the holder 1 is not limited to grooving tools.

[0009] The body 2 has a rod shape which extends along a first central axis S2 from a first end 2a towards a second end 2b, as shown in the Fig. 1 and Fig. 4. In other words, the body 2 has a columnar shape. Examples of the columnar shape include a cylindrical shape and a prismatic shape. In one embodiment, the body 2 has a quadrangular prismatic shape. The quadrangular prismatic shape is a concept that includes not only a strict quadrangular prismatic shape, but also those having slight irregularities or curvatures. However, the shape of the body 2 is not limited to the quadrangular prismatic shape.

[0010] The first central axis S2 of the body 2 in the embodiment corresponds to a central axis of a shaft 27, which will be described later. The central axis of the shaft 27 is an axis that passes through both ends of the shaft 27 in a direction parallel to a longitudinal direction "a" of the body 2.

[0011] The body 2 has an upper surface 21, a lower surface 22 arranged on an opposite side of the upper surface 21, an end surface 23 arranged on one side of the first end 2a between the upper surface 21 and the lower surface 22, an upper claw 261 and a lower claw 262 arranged on one side of the first end 2a, and a pocket 3 arranged between the upper claw part 261 and the lower claw part 262, as shown in the Fig. 1 is shown.

[0012] Alternatively, in the embodiment, the body 2 may include a head 26 disposed on one side of the first end 2a and the shank 27 disposed on one side of the second end 2b. The head 26 is a part configured to have a cutting insert 110, which will be described later (hereinafter also referred to as "the insert 110"), fixed thereto. The upper claw 261 and the lower claw 262 are disposed on the head 26. In other words, the head 26 includes the upper claw 261 and the lower claw 262. The shank 27 is a part configured to be held by a machine tool (not shown).

[0013] The body 2 may further include a screw hole 28. In one embodiment, the screw hole 28 is a portion that allows insertion of a screw 120, which will be described later. The screw hole 28 is arranged from the upper claw 261 to the lower claw 262. The insert 110 may be fixed by a clamping force obtainable if the upper claw 261 is elastically deformed to be pressed downward, by fastening the screw 120 in a state in which the insert is held between the upper claw 261 and the lower claw 262, as shown in FIG. Fig. 16, which will be described later. However, the fixing of the insert 110 is not limited to a clamping mechanism using the clamping force.

[0014] The insert 110 can be arranged on the pocket 3. The upper claw 261 is arranged above the pocket 3, and the lower claw 262 is arranged below the pocket 3. The terms "top" and "bottom" can be determined, for example, with reference to the upper surface 21 and the lower surface 22 of the body 2 or the first central axis S2. In particular, the above determination can be carried out by considering one side of the upper surface 21 as an upper side and one side of the lower surface 22 as a lower side.

[0015] For example, steel, cast iron, and an aluminum alloy can be used as a material of the body 2. Dimensions of the body 2 can be set to the following values. A dimension of the body 2 in a direction parallel to the longitudinal direction "a" of the body 2, which is in the Fig. 14 is, for example, 90 to 180 mm. A dimension of the holder 2 in a direction orthogonal to the longitudinal direction "a" is, for example, 10 to 40 mm.

[0016] The flow path 4 is arranged inside the body 2, as shown in the Fig. 2, to serve as a part along which a coolant (cooling fluid) flows. Examples of the coolant include water-insoluble cutting fluids and water-soluble cutting fluids. Examples of the water-insoluble cutting fluids include oil-based cutting fluids, inert-extreme-pressure-based cutting fluids, and active-extreme-pressure-based cutting fluids. Examples of the water-soluble cutting fluids include emulsion-type, soluble-type, and solution-type cutting fluids. Alternatively, the coolant may be a gas, such as an inert gas, instead of a liquid.

[0017] In one of the embodiments, the flow path 4 has an inflow inlet 4a and an outflow outlet 4b.

[0018] The inflow inlet 4a is a portion that allows the coolant supplied from the outside to flow in. There may be at least one or a plurality of inflow inlets 4a. The inflow inlet 4a is formed of two parts: a first inflow inlet 4a1 open in an inner surface 24 located on one side of the second end 2b of the body 2, and a second inflow inlet 4a2 open in the bottom surface 22 in one of the embodiments. In the case where the plurality of inflow inlets 4a are included, as in this embodiment, the inflow inlet 4a to be used can be selected depending on the machining environment. The inflow inlet 4a, which is unnecessary, must be closed, for example, by a detachable sealing member, to prevent the coolant from leaking out. The number and position of the inlet ports 4a is not limited to the above embodiment.

[0019] The outlet 4b is a section that allows the coolant to flow out toward the insert 110. As shown in the Fig. As shown in Figure 3, in one embodiment, the outflow outlet 4b is open in a second end face 232, which will be described later. Alternatively, the outflow outlet 4b may also be open in another portion in addition to the second end face 232. That is, there may be at least one or a plurality of outflow outlets 4b. If there are a plurality of outflow outlets 4b, an opening position of the outflow outlet 4b can be determined, for example, according to the shape of the insert 110.

[0020] The flow path 4 has a first flow path 41, as shown in the Fig. 2 and Fig. 6. The first flow path 41, in one embodiment, extends along a second central axis S41 in a bottom-up direction and is open at a second end surface 232, which will be described later. The first flow path 41 includes the discharge outlet 4b. The first flow path 41 is positioned lower than the pocket 3 and is inclined toward the second end 2b as it moves away from the pocket 3.

[0021] The second central axis S41 can be obtained, for example, by assuming that a center of an inner diameter of a portion of the first flow path 41 located near the discharge outlet 4b is continuous. The portion of the first flow path 41 located near the discharge outlet 4b extends in a rectilinear shape. In one embodiment, the entirety of the first flow path 41 extends in a rectilinear shape.

[0022] The holder 1 has the following configurations. The end surface 23 has a first end surface 231 and a second end surface 232, which are arranged sequentially downwards from the pocket 3, as shown in the Fig. 3 and Fig. 7. The end surface 23 further has a groove 5.

[0023] The first end surface 231 is located lower than the pocket 3. The first end surface 231 extends to approach the second end 2b as it moves away from the pocket 3. In other words, the first end surface 231 is inclined toward the second end 2b as it moves away from the pocket 3.

[0024] The second end surface 232 is positioned lower than the first end surface 231. The second end surface 232 extends away from the second end 2b. In other words, the second end surface 232 extends toward the first end 2a as it moves away from the first end surface 231. In one embodiment, the first flow path 41 is open in the second end surface 232, and the outflow outlet 4b is located at the second end surface 232.

[0025] At least a portion of the groove 5 is disposed on the first end surface 231 and extends in a bottom-up direction. The groove 5 can serve as a part that directs a coolant flow toward the insert 110, which is configured to be disposed on the pocket 3.

[0026] As it is in the Fig. 8, in a cross section orthogonal to the bottom surface 2 and having the first flow path 41, a first angle Θ1 formed by the first end surface 231 and the first central axis S2 is smaller than a second angle Θ2 formed by the second central axis S41 and the first central axis S2.

[0027] With the above configuration, the following effects can be obtained. A larger thickness of the body 2 near the first end surface 231 can be ensured because the first angle Θ1 is smaller than the second angle Θ2. This leads to improved durability of the holder 1. Furthermore, since at least a portion of the groove 5 is located on the first end surface 231, the coolant flow can be directed toward the insert 110. Consequently, it is easy for the coolant to accurately reach a target position, resulting in an improved cooling effect.

[0028] The first angle Θ1, for example, is 55 to 70°. The second angle Θ2, for example, is 75 to 78°.

[0029] The first angle Θ1 and the second angle Θ2 can be determined based on a line X2 parallel to the first central axis S2. Alternatively, the first angle Θ1 and the second angle Θ2 can be determined based on a line X3 parallel to the lower surface 22. In particular, in one embodiment, the lower surface 22 has a flat shape. With this configuration, the first angle Θ1 and the second angle Θ2 can be determined based on the line X2 and the line X3.

[0030] The second end surface 232 is in one of the embodiments parallel to the lower surface 22 in a side view, as shown in the Fig. 7. The term "side view" refers to a state in which the holder 1 is viewed toward the side surface 25 of the body 2. The term "parallel" means that both must be approximately parallel to each other and may have an error of, for example, ±2°.

[0031] The groove 5 may extend in a direction along the second central axis S41, as shown in the Fig. 8. In other words, the groove 5 may be inclined toward the second end 2b as it moves away from the pocket 3. A fifth angle Θ5 formed by the groove 5 and the first central axis S2 may be equal to the second angle Θ2. If these configurations are met, it is possible to improve a coolant conduction function through the groove 5.

[0032] The fifth angle Θ5 must be approximately equal to the second angle Θ2, and there may be a slight difference between the two angles. In particular, there may be a difference of ±3° between the two angle values, for example. The fifth angle Θ5 can be determined in the same way as the first angle Θ1 and the second angle Θ2. For example, the fifth angle Θ5 can be determined based on the line X2 or the line X3, as in one of the embodiments.

[0033] In a cross-section orthogonal to the second central axis S41, the groove 5 may have the shape of a circular arc, as shown in the Fig. 10. If this configuration is satisfied, the rigidity of the holder 1 is maintained due to a small area of ​​the groove 5. Consequently, the holder 1 is less susceptible to chatter vibration. The shape of the groove 5 in the above cross section can be other shapes in addition to the circular arc shape. Examples of the other shapes include a curved shape, a triangular shape, and a quadrilateral shape.

[0034] As it is in the Fig. 11, in cross-section orthogonal to the second central axis S41, the first flow path 41 may be in the shape of a circle. A radius of curvature R1 of the first groove 5 may be larger than a radius R2 of the first flow path 41, as shown in the Fig. 10 and Fig. 11. If the insert 1 fulfills these configurations, the coolant is less likely to be dispersed, resulting in an improvement in the coolant conduction function through the groove 5. The curvature radius R1 is, for example, 0.6 to 1.6 mm. The curvature radius R2 is, for example, 0.5 to 1.5 mm.

[0035] As it is in the Fig. As shown in Fig. 9, the outflow outlet 4b may be in the shape of a circle if the first flow path 41 is viewed along an extending direction of the first flow path 41. A radius of curvature R1 of the groove 5 may be larger than a radius R2 of the outflow outlet 4b. If the insert 1 satisfies these configurations, the coolant is less likely to be dispersed, resulting in an improvement in the coolant conduction function through the groove 5.

[0036] A center S5 of the circular arc of the groove 5 may be arranged on a virtual extending line X1 of the second central axis S41, as shown in the Fig. 7, Fig. 9 and Fig. 10. If the insert 1 fulfills this configuration, the coolant is less likely to be distributed, which leads to an improvement in the coolant conduction function through the groove 5. As shown in the Fig. 9, the center S5 of the circular arc of the groove 5 may be arranged at the same position as a center S4b of the discharge outlet 4b when viewed in an extending direction of the first flow path 41.

[0037] The groove 5 can be arranged away from the pocket 3, as shown in the Fig. 13. In particular, an upper end 51 of the groove 5 may be located away from the pocket 3. If the groove 5 satisfies this configuration, it is easy to ensure a thickness of the body 2 near the pocket 3, resulting in an improvement in the durability of the holder 1. Since the rigidity of the holder 1 can also be improved, the holder 1 is less likely to be subjected to chatter vibrations during a cutting operation.

[0038] As it is in the Fig. As shown in Figure 13 in a front view of the first end 2a, the groove 5 may include a first region 54 whose width W1 decreases in a direction orthogonal to the second central axis S41 as it moves upwards, and a second region 55 whose width W2 decreases in the direction orthogonal to the second central axis S41 as it moves downwards. If the groove 5 fulfills this configuration, it is possible to improve the coolant conduction function through the groove 5.

[0039] The first region 54 may include the upper end 51 of the groove 5. The second region 55 may include the lower end 52 of the groove 5. A boundary between the first region 54 and the second region 55 may be located at a central portion 53 of the groove 5 in a direction parallel to the second central axis S41. A width W3 of the central portion 53 in a direction orthogonal to the second central axis S41 may be equal to or greater than either of the width W1 and the width W2. For example, the width W3 may correspond to a maximum value of a width of the groove 5 in the direction orthogonal to the second central axis S41. The widths W1, W2, and W3 may be determined based on a direction "c" orthogonal to the extension direction "b" of the groove 5. The width W1 is, for example, 0.1 to 2 mm. The width W2 is, for example, 0.1 to 2 mm. The width W3, for example, is 1.2 to 3.2 mm.

[0040] As it is in the Fig. As shown in Figure 13, at least a portion of the groove 5 may be arranged on a virtual extending line X1 of the second central axis S41 in a front view of the first end 2a. The upper end 51 of the groove 5 may be arranged on the virtual extending line X1 in the front view of the first end 2a. If the groove 5 satisfies this configuration, it is possible to improve the coolant conduction function through the groove 5.

[0041] The end surface 23 may further comprise a third end surface 233 disposed between the first end surface 231 and the second end surface 232, as shown in the Fig. 3. If the end surface 23 satisfies this configuration, stress is less likely to be concentrated between the first end surface 231 and the second surface 232 during the cutting process, resulting in improved rigidity of the holder 1. As shown in the Fig. 7, the third end surface 233 is parallel to a line X4 which is orthogonal to the lower surface 22 in a side view in one of the embodiments.

[0042] As it is in the Fig. 5, a fourth angle Θ4 formed by the second end surface 232 and the third end surface 233 may be larger than a third angle Θ3 formed by the second end surface 232 and the first end surface 231.

[0043] When the end surface 23 meets this configuration, it is easy to ensure a thickness of the body 2 near the third end surface 233, which leads to improved rigidity of the holder 1. The fourth angle Θ4 is, for example, 85 to 105°. The fourth angle Θ4 is 90° in one of the embodiments. The third angle Θ3 is, for example, 55 to 75°.

[0044] The end surface 23 may further comprise a fourth end surface 234 disposed between the pocket 3 and the first end surface 231, as shown in the Fig. 3. If the end surface 23 satisfies this configuration, stress is less likely to be concentrated between the pocket 3 and the first end surface 231 during the cutting process, resulting in improved rigidity of the holder 1. As shown in the Fig. As shown in Figure 7, in one of the embodiments, in a side view, the fourth end surface 234 is parallel to the line X4, which is orthogonal to the lower surface 22. In other words, in the embodiment, in the side view, the fourth end surface 234 is parallel to the third end surface 233.

[0045] The groove 5 may be arranged from the first end surface 231 to the fourth end surface 234, as shown in the Fig. 3. If the groove 5 fulfills this configuration, it is possible to improve the coolant conduction function through the groove 5.

[0046] As it is in the Fig. 13, L1, L2, and L3 may have a relationship of L1≥L3≥L2, where, in a front view of the first end 2a, L1 is a dimension of the first end surface, L2 is a dimension of the third end surface, and L3 is a dimension of the fourth end surface 234 in the direction parallel to the second central axis S41. Alternatively, L1 and L2 may have a relationship of L1>L2. If the end surface 23 satisfies this configuration, the first end surface 231 occupies a large proportion of the end surface 23, and therefore, the rigidity of the holder 1 can be improved and chatter vibration is less likely to occur. Furthermore, the coolant conduction function by the groove 5 can be improved. L1 is, for example, 3 to 5 mm. L2 is, for example, 1 to 3 mm. L3 is, for example, 2 to 4 mm.

[0047] In one of the embodiments, the flow path 4 further comprises a second flow path 42 and a third flow path 43, as shown in the Fig. 2. The second flow path 42 is connected to the first flow path 41 and slopes upward as it moves away from the first flow path 41. The third flow path 43 is connected to the second flow path 42 and includes the inflow inlet 4a. This configuration of the flow path 4 is not limited to the previous embodiments. For example, although the third flow path 43 is formed of a plurality of flow paths having a branch point in one of the embodiments, the third flow path 43 may be formed of a single flow path without any branch point. Alternatively, another flow path may be interposed between the individual flow paths in the first flow path 41 to the third flow path 43.

[0048] There is no particular limitation on the shape of the flow path 4, as long as the flow path 4 allows the flow of a coolant. In one embodiment, the flow path 4 is circular in a cross section orthogonal to the coolant flow direction. A diameter of the first flow path 41 is, for example, 1 to 3 mm. A diameter of the second flow path 42 is, for example, 1 to 4 mm. A diameter of the third flow path 43 is, for example, 3 to 10 mm.

[0049] The flow path 4 can be formed, for example, by drilling using a drill or the like. A portion of a hole formed by the drilling process that does not serve as the flow path 4 must be sealed with a sealing member to prevent coolant leakage. Examples of the sealing member include solder, resin, and a screw member. Cutting tool

[0050] The cutting tools in various embodiments of the present disclosure are described in detail below with reference to the Fig. 15 to 19 described.

[0051] As it is in the Fig. As shown in FIGS. 15 to 19, in one embodiment, the cutting tool 100 includes the holder 1 and the insert 110 disposed on the pocket 3. The cutting tool 100 in the embodiment is capable of maintaining excellent cutting performance for a long duration due to the holder 1, which has improved durability and good cooling effect.

[0052] The insert 110 has a prismatic shape in one of the embodiments as shown in the Fig. 16. The insert 110 includes a pair of cutting edge portions 110a disposed on sides at both ends in a longitudinal direction "d" of the insert 110, and a clamping portion 110b disposed between the pair of cutting edge portions 110a. The clamping portion 110b is designed to be clamped by the upper claw 261 and the lower claw 262 of the holder 1.

[0053] Each of the cutting edge portions 110a has an upper surface 111, a lower surface 112, a side surface 113, and a cutting edge 114. At least a portion of the upper surface 111 serves as a rake surface over which chips flow during a cutting operation. At least a portion of the lower surface 112 serves as an attachment surface for the pocket 3. The side surface 113 is connected to each of the upper surface 111 and the lower surface 112. At least a portion of the side surface 113 serves as a flank surface or clearance surface during the cutting operation.

[0054] The cutting edge 114 is arranged on at least a part of a ridge 115 at which the upper surface 111 intersects the side surface 113. In one of the embodiments, the cutting edge 114 is arranged beyond the ridge 115. The insert 110 is arranged on the pocket 3 in a state in which the cutting edge 114 protrudes on one side of the first end 2a of the body 2, as shown in the Fig. 17 and Fig. 19 is shown.

[0055] As a material of the insert 110, for example, cemented carbide or cermet can be used. Examples of cemented carbide may include WC-Co, WC-TiC-Co, or WC-TiC-TaC-Co. WC-Co is produced by adding cobalt powder (Co powder) to tungsten carbide (WC), followed by sintering. WC-TiC-Co is produced by adding titanium carbide (TiC) to WC-Co. WC-TiC-TaC-Co is produced by adding tantalum carbide (TaC) to WC-TiC-Co. Cermet is a sintered composite material obtainable by combining metal and a ceramic component. Examples of cermets include those mainly formed of a titanium composition, such as titanium carbide (TiC) or titanium nitride (TiN).

[0056] A surface of the insert 110 may be coated with a coating layer. Examples of the composition of the coating layer include titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN), and aluminum oxide (Al2O3). For example, a chemical vapor deposition (CVD) or physical vapor deposition (PVD) method can be used as a method for depositing a coating layer.

[0057] The dimensions of the insert 110 can be set to the following values, for example. A dimension of the insert 110 in a direction parallel to the longitudinal direction "d" of the insert 110 is, for example, 15 to 30 mm. A dimension of the insert 110 in a direction orthogonal to the longitudinal direction "d" is, for example, 2 to 10 mm. A dimension of the insert 110 from the upper surface 111 to the lower surface 112 is, for example, 3 to 5 mm.

[0058] The cutting tool 100 may further include a screw 120. When this configuration is met, a clamping force can be set by tightening the screw 120. Method for producing a cut product

[0059] Methods for producing a cut product in various embodiments of the present disclosure are described below with reference to the Fig. 20 to 22 described in detail.

[0060] The method of manufacturing a cut product of the cut product in one of the embodiments comprises the following steps: (1) Rotating a workpiece 200 as shown in the Fig. 20 is shown, (2) Bringing the cutting tool 100 into contact with the workpiece 200 which is rotated as shown in the Fig. 21 is shown, and (3) Separating the cutting tool 100 from the workpiece 200 as shown in Fig. 22 is shown.

[0061] In particular, as it is in the Fig. 20, the workpiece 200 is first rotated about its rotation axis O. Examples of the material of the workpiece 200 include carbon steel, steel alloys, stainless steel, cast iron, and non-ferrous metals.

[0062] The cutting tool 100 is then brought relatively close to the workpiece 200, which is rotated by moving the cutting tool 100 in an arrow direction Z1.

[0063] As it is in the Fig. 21, the workpiece 200 is then cut by bringing the cutting edge 114 of the cutting tool 100 into contact with the workpiece 200 while it is rotating. Alternatively, the workpiece 200 may be cut while causing the coolant to flow out of the first discharge outlet 4b.

[0064] Finally, the cutting tool 100 is moved relatively away from the workpiece 200 to obtain a cut product 210 by moving the cutting tool 100 in an arrow direction Z2 as shown in the Fig. 22 is shown.

[0065] With the method for manufacturing a cut product in any of the embodiments, a cutting process with excellent cutting performance can be performed for a long time due to the use of the cutting tool 100 having the holder 1, which has improved durability and a good cooling effect. It is therefore possible to obtain the cut product 210 having a high-precision machined surface.

[0066] Although in the embodiment, the cut product 210 can be obtained by moving the cutting tool 100, it is not intended to be limited thereto. For example, in step (1), the workpiece 200 can be brought close to the cutting tool 100. Similarly, in step (3), the workpiece 200 can be moved away from the cutting tool 100. If it is desired to continue the cutting process, it is necessary to repeat the step of bringing the cutting edge 114 into contact with various portions of the workpiece 200 while continuing to rotate the workpiece 200.

[0067] Although the cutting tool holders 1, the cutting tools 100, and the methods for manufacturing the cut product 210 have been exemplified above in the embodiments of the present disclosure, the present disclosure is not limited to the above embodiments. It is, of course, possible to implement any of them as long as they do not deviate from the scope of the present disclosure.

[0068] For example, a portion of the body 2 of the holder 1 having the end face 23 may be formed of a different material than other portions of the body 2. The portion having the end face 23 may be attachable to another portion of the body 2.

[0069] For example, in the above embodiment, each of the pocket 3, the upper claw 261, and the lower claw 262 may extend along the longitudinal direction "a" of the body 2. Alternatively, each of the pocket 3, the upper claw part 261, and the lower claw part 262 may extend in a direction orthogonal to the longitudinal direction "a."

[0070] Throughout this disclosure, the singular forms “a” and “an” include the plural forms thereof, unless the context clearly indicates otherwise. List of reference symbols 1 cutting tool holder 2 bodies S2 first, central axis 2a first end 2b second end 21 upper surface 22 lower surface 23 End face 231 first end face 232 second end face 233 third end face 234 fourth end face 5 grooves S5 Mitte 51 upper end 52 lower end 53 Middle section 54 first area 55 second area 24 End face 25 side surface 26 heads 261 upper claw 262 lower claw 27 shaft 28 screw holes 3 bags 4 Flow path 4a Inlet 4a1 first inlet 4a2 second inlet 4b Outlet S4b Middle 41 first flow path S41 second, central axis X1 virtual extending line X2 line parallel to the first central axis X3 Line parallel to the lower surface X4 Line orthogonal to the lower surface 42 second flow path 43 third flow path 100 cutting tools 110 cutting insert 110a cutting part 111 upper surface 112 lower surface 113 side surface 114 Cutting edge 115 Comb 110b clamping part 120 screw 200 workpieces 210 cut product a Longitudinal direction of the body b Direction of extension of the groove c Direction orthogonal to the direction of extension of the groove d Longitudinal direction of the insert L1 Dimension of the first end face L2 Dimension of the third end face L3 Dimension of the fourth end face O axis of rotation R1 radius of curvature of the groove R2 Radius of the outlet W1 Width of the first area W2 Width of the second area W3 Width of the middle section Z1 arrow direction Z2 arrow direction Θ1 first angle Θ2 second angle Θ3 third angle Θ4 fourth angle Θ5 fifth angle

Claims

[1] A cutting tool holder (1), comprising: a body (2) in a rod shape, which extends from a first end (2a) to a second end (2b) along a first central axis (S2), and a flow path (4) arranged within the body (2) and arranged to allow a coolant to flow, wherein the body (2) has an upper surface (21), a lower surface (22) arranged opposite to the upper surface (21), an end surface (23) arranged on one side of the first end (2a) between the upper surface (21) and the lower surface (22), an upper claw (261) and a lower claw (262) arranged on one side of the first end (2a), and a pocket (3) arranged between the upper claw (261) and the lower claw (262), the end face (23) has a first end surface (231) which is arranged lower than the pocket (3) and extends to approach the second end (2b) as it moves away from the pocket (3), a second end surface (232) which is arranged lower than the first end surface (231) and extends to move away from the second end (2b), and a groove (5), at least a part of which is arranged on the first end surface (231) and extends in a direction from bottom to top, the flow path (4) has a first flow path (41) which extends in a direction from bottom to top along a second central axis (S41) and is open in the second end surface (232), in a cross-section which is orthogonal to the lower surface (22) and has the first flow path (41), a first angle (Θ1) formed by the first end surface (231) and the first central axis (S2) is smaller than a second angle (Θ2) formed by the second central axis (S41) and the first central axis (S2), and a fifth angle (Θ5), which is formed by the groove (5) and the first central axis (S2), is equal to the second angle (Θ2). [2] The cutting tool holder (1) according to claim 1, wherein in a front view of the first end (2a) the groove (5) comprises: a first region (54) whose width decreases in a direction orthogonal to the second central axis (S41) as it moves upwards, and a second region (55) whose location is lower than that of the first region (54) and whose width decreases in the direction orthogonal to the second central axis (S41) as it moves downwards. [3] A cutting tool holder (1), comprising: a body (2) in a rod shape, which extends from a first end (2a) to a second end (2b) along a first central axis (S2), and a flow path (4) arranged within the body (2) and arranged to allow a coolant to flow, wherein the body (2) has an upper surface (21), a lower surface (22) arranged opposite to the upper surface (21), an end surface (23) arranged on one side of the first end (2a) between the upper surface (21) and the lower surface (22), an upper claw (261) and a lower claw (262) arranged on one side of the first end (2a), and a pocket (3) arranged between the upper claw (261) and the lower claw (262), the end face (23) has a first end surface (231) which is arranged lower than the pocket (3) and extends to approach the second end (2b) as it moves away from the pocket (3), a second end surface (232) which is arranged lower than the first end surface (231) and extends to move away from the second end (2b), and a groove (5), at least a part of which is arranged on the first end surface (231) and extends in a direction from bottom to top, the flow path (4) has a first flow path (41) which extends in a direction from bottom to top along a second central axis (S41) and is open in the second end surface (232), in a cross-section which is orthogonal to the lower surface (22) and has the first flow path (41), a first angle (Θ1) formed by the first end surface (231) and the first central axis (S2) is smaller than a second angle (Θ2) formed by the second central axis (S41) and the first central axis (S2), and in a front view of the first end (2a) has the groove (5): a first region (54) whose width decreases in a direction orthogonal to the second central axis (S41) as it moves upwards, and a second region (55) whose location is lower than that of the first region (54) and whose width decreases in the direction orthogonal to the second central axis (S41) as it moves downwards. [4] The cutting tool holder (1) according to any one of claims 1 to 3, wherein the groove (5) has a circular arc shape in a cross section orthogonal to the second central axis (S41). [5] The cutting tool holder (1) according to claim 4, wherein the first flow path (41) has a circular arc shape in a cross-section orthogonal to the second central axis (S41) and a radius of curvature of the groove (5) is greater than a radius of curvature of the first flow path (41). [6] The cutting tool holder (1) according to claim 5, wherein a center of the circular arc of the groove (50) is located on a virtual extending line (X1) of the second central axis (S41). [7] The cutting tool holder (1) according to any one of claims 1 to 6, wherein the groove (5) is arranged away from the pocket (3). [8] The cutting tool holder (1) according to any one of claims 1 to 7, wherein the end surface (23) further comprises a third end surface (233) disposed between the first end surface (231) and the second end surface (232). [9] The cutting tool holder (1) according to claim 8, wherein a fourth angle (Θ4) formed by the second end surface (232) and the third end surface (233) is larger than a third angle (Θ3) formed by the second end surface (232) and the first end surface (231). [10] The cutting tool holder (1) according to any one of claims 1 to 9, wherein the end surface (23) further comprises a fourth end surface (234) disposed between the pocket (3) and the first end surface (231). [11] The cutting tool holder (1) according to claim 10, wherein the groove (5) is arranged from the first end surface (231) to the fourth end surface (234). [12] The cutting tool holder (1) according to any one of claims 1 to 11, wherein the end surface (23) further comprises a third end surface (233) arranged between the first end surface (231) and the second end surface (232), and a fourth end surface (234) arranged between the pocket (3) and the first end surface (231), and L1, L2 and L3 have a relationship of L1 ≥ L3 ≥ L2, where L1 is a dimension of the first end surface (231), L2 is a dimension of the third end surface (233) and L3 is a dimension of the fourth end surface (234) in a direction parallel to the second central axis (S41) in a front view of the first end (2a). [13] A cutting tool (100) comprising: a cutting tool holder (1) according to any one of claims 1 to 12, and a cutting insert (110) which is arranged on the pocket (3). [14] A method for producing a cut product (210), comprising: Rotating a workpiece (200), Bringing the cutting tool (100) according to claim 13 into contact with the workpiece (200) which is rotated, and Moving the cutting tool (100) away from the workpiece (200).

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