Rotary tool and method for producing a machine-made product

Abstract

A rotary tool (1, 1a, 1b), comprising: a base (3) which has a rod shape and extends along an axis of rotation (X) from a first end (3a) to a second end (3b), where the base (3) a cutting part (5) arranged to have the first end (3a), a shaft part (7) which is arranged closer to one side of the second end (3b) than the cutting part (5), and a flow path (9) that is arranged within the base (3) and extends along the axis of rotation (X), the cutting part (5) has an outer perimeter area (11), a first cutting edge (13) which is arranged from the first end (3a) in the direction of the outer circumferential surface (11), a first groove (15) extending helically from the first cutting edge (13) towards one side of the second end (3b), and a first ridge line (17) formed by the first groove (15) and the outer circumferential surface (11), which is adjacent to the first groove (15) on a rear side in a direction of rotation (Y) of the axis of rotation (X), the flow path (9) a main flow path (19) extending from one side of the second end (3b) to one side of the first end (3a), and a first secondary flow path (21) extending from the main flow path (19) towards one side of the second end (3b), the first secondary flow path (21) has a first opening (23) which leads into the first groove (15), a first angle (Θ1) formed by the axis of rotation (X) and the first sideflow path (21) is smaller than a skew angle (Θ2) formed by the axis of rotation (X) and the first crest line (17), and the first angle (Θ1) is set to 0 degrees to 25 degrees

Description

TECHNICAL AREA

[0001] The present disclosure relates to a rotary tool and a method for producing a machined product. BACKGROUND

[0002] A rotary tool is described in JP 2009078 330 A (Patent Document 1). The chip removal performance can be improved by directing a coolant from one side of a front end to one side of a rear end.

[0003] In the rotary drilling tool (rotary tool) discussed in patent document 1, the angle formed by a branch flow path connected to a rear discharge opening and an axis of rotation can be greater than the helix angle of a groove. Therefore, when a cut is enlarged by increasing the helix angle, the coolant can flow in a direction away from the axis of rotation, making it less likely that chips will be discharged towards the side of the rear end.

[0004] Other rotary tools with coolant flow paths are known, for example, from JP 2005 262 330 A and AT 001 324 U1. Furthermore, a rotary tool with a varying helix angle is known, for example, from US 2003 / 0 118 411 A1. BRIEF EXPLANATION

[0005] According to the invention, a rotary tool with the features of claim 1 and a method for producing a machined product with the features of claim 12 are provided. Further embodiments of the rotary tool are described in the dependent claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a perspective view showing a rotary tool in a non-restrictive embodiment of the present disclosure, and showing a state in which a flow path and the like are visible. Fig. 2 is a side view of the in Fig. 1 shown rotary tool, Fig. 3 is a side view of the in Fig. 1 shown rotary tool, Fig. 4 is a side view of the in Fig. 1 shown rotary tool, Fig. 5 is a side view of the in Fig. 1 shown rotary tool, Fig. 6 is a side view of the in Fig. 1 shown rotary tool, Fig. Figure 7 is an enlarged view of the surroundings of a first end of the in Fig. 1 shown rotary tool, Fig. Figure 8 is an enlarged view of the area around the first end of the in Fig. 2 shown rotary tool, Fig. Figure 9 is an enlarged view of the area around the first end of the in Fig. 3 shown rotary tool, Fig. Figure 10 is an enlarged view of the area around the first end of the in Fig. 4 shown rotary tool, Fig. Figure 11 is an enlarged view of the area around the first end of the in Fig. 5 shown rotary tool, Fig. Figure 12 is an enlarged view of the area around the first end of the in Fig. 6 shown rotary tool, Fig. Figure 13 is a representation showing a rotary tool in a non-restrictive embodiment of the present disclosure, Fig. Figure 14 is a representation showing a rotary tool in a non-restrictive embodiment of the present disclosure, Fig. Figure 15 is a schematic representation showing one of the steps in a process for producing a machined product in a non-restrictive embodiment of the present disclosure. Fig. Figure 16 is a schematic representation showing one of the steps in the process for producing a machined product in the non-restrictive embodiment of the present disclosure, and Fig. Figure 17 is a schematic representation showing one of the steps in the process for producing a machined product in the non-restrictive embodiment of the present disclosure. EXECUTION FORMS <rotationswerkzeuge>

[0006] Rotary tools in non-restrictive embodiments of the present disclosure can be described in detail with reference to the drawings. In particular, a drill as an embodiment of the rotary tools can be described in detail with reference to the drawings. Examples of rotary tools can include end mills and reamers in addition to drills. Therefore, the drill described below can be replaced by the rotary tool, such as the end mill.

[0007] For descriptive purposes, the drawings referenced below can only show the most important elements of the embodiments in simplified form. The rotary tools can therefore include any structural element not shown in the referenced drawings. The dimensions of the elements in the drawings cannot accurately represent the dimensions of the actual structural elements or their dimensional ratios. These points also apply to a later described method for manufacturing a machined product.

[0008] The rotary tool 1 in a Fig. In the non-restrictive embodiment shown in Figure 1, the drill can be a drill and can have a base 3 that is rod-shaped and extends along an axis of rotation X from a first end 3a to a second end 3b. In a cutting operation of a workpiece for the purpose of manufacturing a machined product, the base 3 with the rod shape is rotatable in an arrow direction Y about the axis of rotation X, as shown in Figure 1. Fig. 1. Non-restrictive embodiment shown.

[0009] In the Fig. In the non-restrictive embodiment shown in Figure 1, a lower left end of the base 3 can be the first end 3a and an upper right end can be the second end 3b. An upper end part of the base 3 can be the first end 3a, and a lower end part thereof can be the second end 3b in the Fig. The non-restrictive embodiments shown in Figures 2 to 6 are generally considered to be the first end 3a and the second end 3b is generally referred to as the rear end.

[0010] Fig. Figures 3 to 6 show a state in which the in Fig. The rotary tool shown in Figure 2 is rotated by a predetermined angle in one direction of rotation. In particular, it shows Fig. 3 a state in which the in Fig. The rotary tool shown in section 2 is rotated by 10 degrees in the direction of rotation. Fig. 4 shows a state in which the in Fig. The rotating tool shown in Figure 2 is rotated by 70 degrees in the direction of rotation. Fig. 5 shows a state in which the in Fig. The rotary tool shown in section 2 is rotated 90 degrees in the direction of rotation. Fig. 6 shows a state in which the in Fig. The rotary tool shown in Figure 2 is rotated 180 degrees in the direction of rotation.

[0011] The base 3 in the in Fig. The non-restrictive embodiment shown in Figure 1 can have a column shape. The term "column shape" is a concept that includes not only strictly circular columns, but also those with a slightly concave-convex or curved surface. The shape of the base 3 is not limited to the column shape.

[0012] An outer diameter D in the base 3 is adjustable to, for example, 4-25 mm. A ratio between L and D is adjustable to, for example, L=4D to 15D, where L is a length of the base 3 in one direction along the axis of rotation X.

[0013] In the non-restrictive embodiment, which is described in the Fig. As shown in Figures 1 to 6, the base 3 can have a cutting part 5 arranged to enclose the first end 3a, and a shank part 7 arranged on one side closer to the second end 3b than the cutting part 5. The cutting part 5 can have a section that comes into contact with a workpiece. This section can play an essential role in a cutting operation on the workpiece. The shank part 7 can be a part that is held, for example, by a spindle rotating in a machine tool and is shaped according to the shape of the spindle. Examples of the shape of the shank part 7 include a straight shank, a long shank, a long neck, and a tapered shank.

[0014] The cutting part 5 can be inserted into the Fig. 1 in the non-restrictive embodiment shown, comprising an outer circumferential surface 11, a first cutting edge 13, a first groove 15 and a first ridge line 17.

[0015] The outer circumferential surface 11 can be a surface that is arranged on an outer circumference of the cutting part 5. Fig. Figures 1 to 6 show non-restrictive embodiments in which the distance from the axis of rotation X to the outer circumferential surface 11 is kept approximately constant.

[0016] The first cutting edge 13 can be in the Fig. In the non-restrictive embodiment shown in Figure 1, the first cutting edge 13 is arranged from the first end 3a towards the outer circumferential surface 11. The first cutting edge 13 is also generally referred to as the tip edge. The first cutting edge 13 can play a significant role in chip formation during the cutting process. These points also apply to a second cutting edge 37 described later.

[0017] The first groove 15 can be located during the in Fig. In the non-restrictive embodiment shown in Figure 1, the first groove 15 extends helically from the first cutting edge 13 towards one side of the second end 3b. The first groove 15 can be a chip ejection groove for the chips produced by the first cutting edge 13 during machining of the workpiece. The first groove 15 is therefore also referred to as a chip ejection groove. These points also apply to a second groove 39 described later.

[0018] In the Fig. In the non-restrictive embodiment shown in Figure 1, the first groove 15 can extend helically around the axis of rotation X, such that it extends from the first cutting edge 13 towards the second end 3b to a side opposite the direction of rotation Y. The term "helically extending" means that the first groove 15 extends from the first cutting edge 13 towards the side of the second end 3b in an approximately twisting manner. Therefore, the first groove 15 can have a partially non-twisted portion. These points also apply to the second groove 39 described later.

[0019] In the Fig. In the non-restrictive embodiment shown in 1, the first ridge line 17 can be a ridge line formed by the first groove 15 and the outer circumferential surface 11 adjacent to the first groove 15 on a rear side in the direction of rotation Y of the axis of rotation X.

[0020] The base 3 can further have a flow path 9, which is arranged inside the base 3 and is located in the Fig. The non-restrictive embodiment shown in Figure 1 extends along the axis of rotation X. The flow path 9 can be a part that allows fluid to pass through.

[0021] The fluid flowing through flow path 9 is generally referred to as the coolant. Examples of coolants include water-insoluble cutting fluids, water-soluble cutting fluids, and compressed air. Examples of water-insoluble cutting fluids include oil-based, inert high-pressure-based, and active high-pressure-based cutting fluids. Examples of water-soluble cutting fluids include emulsion-like, soluble, and solution-like cutting fluids. The coolant can be selected appropriately according to the workpiece material.

[0022] Examples of the shape of the flow path 9 can be straight or curved. Examples of curved shapes can be helical. The shape of the flow path 9 is not particularly restricted as long as it allows the fluid to pass through it. This also applies to the cross-sectional shape of the flow path 9. A cross-section of the flow path 9 orthogonal to a flow direction of the fluid can, for example, be circular, elliptical, or polygonal.

[0023] Flow path 9 can be found in the Fig. 1 in the non-restrictive embodiment shown, comprising a main flow path 19 and a first secondary flow path 21.

[0024] The main flow path 19 can be found in the Fig. The non-restrictive embodiment shown in Figure 1 extends from one side of the second end 3b to one side of the first end 3a. The main flow path 19 can be in the Fig. The non-restrictive embodiment shown in Figure 1 has a helical shape. In other words, the main flow path 19 can be in the Fig. In the non-restrictive embodiment shown in Figure 1, the main flow path extends helically from the side of the second end 3b towards the side of the first end 3a. The shape of the main flow path 19 is not limited to a helical shape. For example, the main flow path 19 can have a straight shape. The inner diameter of the main flow path 19 can, for example, be set at 0.5–3 mm.

[0025] One or more main flow paths 19 may be provided. In the case of multiple main flow paths 19, these main flow paths 19 may be configured identically or differently. The two main flow paths 9 can be configured as in the Fig. 1. In other words, the flow path 9 can include a first main flow path 19a and a second main flow path 19b as shown in the non-restrictive embodiment. Fig. 1 exhibit the non-restrictive embodiment shown. The first main flow path 19a and the second main flow path 19b can have the same configuration as in the one shown in Fig. 1 depicted non-restrictive embodiment.

[0026] The main flow path 19 can be found in the Fig. 1 in the non-restrictive embodiment shown, having an inlet opening 19c and an outlet opening 19d.

[0027] The inlet opening 19c can be a component that allows an externally supplied fluid to flow into the main flow path 19. The inlet opening 19c can be used in the Fig. In the non-restrictive embodiment shown in Figure 1, the inlet opening 19c can be arranged on an end surface at the second end 3b. The position of the inlet opening 19c is not limited to the end surface at the second end 3b. For example, the inlet opening 19c can be arranged on an outer circumferential surface of the shaft part 7. There can be one or more inlet openings 19c.

[0028] The outlet opening 19d can be a part that allows the fluid to flow out. The outlet opening 19d can be arranged on an end face on the side of the first end 3a, so that the fluid flows into the Fig. In the non-restrictive embodiment shown in Figure 1, the exhaust gas can be expelled in a direction away from the base 3. The position of the exhaust opening 19d is not limited to the end face on the side of the first end 3a. There can be one or more exhaust openings 19d.

[0029] The main flow path 19 need not have the outlet opening 19d. In particular, as shown in Fig. In the non-restrictive embodiment shown in Figure 2, a first secondary flow path 21, described later, can extend from the main flow path 19, and the fluid can be discharged from a first opening 23 of the first secondary flow path 21. In this case, the main flow path 19 need not, for example, have the outlet opening 19d.

[0030] The first secondary flow path 21 can be found in the Fig. In the non-restrictive embodiment shown in Figure 2, the first secondary flow path 21 extends from the main flow path 19 towards one side of the second end 3b. The first secondary flow path 21 may have a first opening 23 that opens into the first groove 15. The first secondary flow path 21 may be a part that is connected to the main flow path 19 and allows the fluid to exit from the first opening 23 towards the side of the second end 3b. The first opening 23 corresponds to an edge of the first secondary flow path 21 that opens into the first groove 15. These points also apply to a second secondary flow path 31 and a third secondary flow path 41, which are described later.

[0031] The first secondary flow path 21 can have a straight shape and extend from the first main flow path 19a towards the side of the second end 3b. Alternatively, the first secondary flow path 21 can extend from the second main flow path 19b towards the side of the second end 3b.

[0032] In a non-restrictive embodiment, which is described in the Fig. 8, Fig. 9 and Fig. As shown in Figure 11, a first angle Θ1, formed by the axis of rotation X and the first secondary flow path 21, can be smaller than a helix angle Θ2, formed by the axis of rotation X and the first crest line 17. In this configuration, the fluid ejected from the first opening 23 towards the side of the second end 3b tends to flow in a direction approaching the axis of rotation X, even if the helix angle Θ2 is increased to improve cutting performance. Therefore, the chips produced by the first cutting edge 13 during the cutting process tend to flow towards the side of the second end 3b through the fluid ejected from the first opening 23. The rotary tool 1 thus has excellent output performance. The rotary tool 1 also has good cutting performance, since the helix angle Θ2 can be increased to improve cutting performance.

[0033] Regarding the first angle Θ1 and the skew angle Θ2, Θ1 and Θ2, each representing a value of the angle, can be specified by an absolute value. In particular, the ratio between the first angle Θ1 and the skew angle Θ2 can be given by |Θ2| > |Θ1|.

[0034] The first angle Θ1 can be evaluated in a state in which an angle formed by the rotation axis X and a central axis Q1 of the first sideflow path 21 is maximized when the cutting part 5 is viewed from a direction orthogonal to the rotation axis X, as in the Fig. 8, a non-restrictive embodiment. The central axis Q1 of the first secondary flow path 21 is achieved by a continuous presence of the center of the first inner diameter of the first secondary flow path 21. The first angle Θ1 is set to 0 degrees to 25 degrees.

[0035] The helix angle Θ2 can be evaluated by an angle formed by the axis of rotation X and the first ridge line 17 when the cutting part 5 is viewed from the direction orthogonal to the axis of rotation X, as in the non-restrictive embodiment shown in the Fig. 9 and Fig. Figure 11 is shown. Alternatively, the inclination angle Θ2 can be determined instead of the rotation axis X using an imaginary straight line that passes through a point on the first ridge line 17 and is parallel to the rotation axis X. The inclination angle Θ2 can, for example, be set to -5 degrees to 40 degrees.

[0036] The first opening 23 can be arranged in a direction along the axis of rotation X closer to the first end 3a than a center 5a of the cutting part 5, as shown in Fig. 2 the non-restrictive embodiment shown. When the above configuration is met, the first opening 23 is located near the first cutting edge 13, so that the chips produced by the first cutting edge 13 during the cutting process tend to flow towards the side of the second end 3b through the fluid ejected from the first opening 23, resulting in improved chip ejection performance.

[0037] The first ridge line 17 can have a first section 25 and a second section 27, which is arranged closer to the side of the second end 3b than the first section 25, as in the non-restrictive embodiment shown in the Fig. 3 and Fig. 5 is shown. A first helix angle Θ2a, formed by the axis of rotation X and the first section 25, can differ from a second helix angle Θ2b, formed by the axis of rotation X and the second section 27, as shown in the Fig. 9 and Fig. 11. If these configurations are met, it is possible to achieve both increased cutting performance and increased strength of the rotary tool 1. In particular, the cutting performance can be increased if the helix angle is large. The strength of the rotary tool 1 can be increased if the helix angle is small. If the first helix angle Θ2a differs from the second helix angle Θ2b, the first angle Θ1 is smaller than both the first helix angle Θ2a and the second helix angle Θ2b.

[0038] The first helix angle Θ2a can be larger than the second helix angle Θ2b, as in the non-restrictive embodiment described in Fig. 9 and Fig. Figure 11 is shown. If this configuration is met, it is possible to facilitate chip flow near the first cutting edge 13 to the side of the second end 3b.

[0039] Although the first helix angle Θ2a can be larger than the second helix angle Θ2b, this is not intended as a restriction. For example, the first helix angle Θ2a can be less than or equal to the second helix angle Θ2b.

[0040] The first opening 23 can be found in the Fig. In the non-restrictive embodiment shown in Figure 5, the first opening 23 is located near a boundary 29 between the first section 25 and the second section 27. In this configuration, chip clogging at the boundary 29, where chip flow can change, is less likely. As used herein, the phrase "the first opening 23 is located near the boundary 29" is a concept that includes not only a state in which the first opening 23 is located strictly at the boundary 29, but also a state in which the first opening 23 is located in the vicinity of the boundary 29, as long as the above effect is achievable. For example, the first opening 23 may be located in a position slightly offset from the boundary 29 toward the side of the first end 3a in the first groove 15.

[0041] In addition to the first secondary flow path 21, the flow path 9 may have further secondary flow paths. There may be one or more of these secondary flow paths. For example, the flow path 9 may further have a second secondary flow path 31, which is located closer to the side of the second end 3b than the first secondary flow path 21 and which extends from the main flow path 19 to the side of the second end 3b, as shown in Fig. 1 non-restrictive embodiment shown. The second bypass path 31 can have a second opening 33, which is located in the Fig. In the non-restrictive embodiment shown in Figure 4, the fluid opens into the first groove 15. If these configurations are met, improved chip discharge can be achieved, since the fluid from the second opening 33 of the second secondary flow path 31 can be discharged to the side of the second end 3b in addition to the first opening 23 of the first secondary flow path 21.

[0042] The second secondary flow path 31 can have a straight shape and can be located in the Fig. In the non-restrictive embodiment shown in Figure 4, the first main flow path 19a extends towards the side of the second end 3b. The second secondary flow path 31 can extend from the second main flow path 19b towards the side of the second end 3b.

[0043] A second angle Θ3, formed by the axis of rotation X and the second flow path 31, may differ from the first angle Θ1, as in a non-restrictive embodiment described in Fig. Figure 10 is shown. If this configuration is met, it is easy to individually control the fluid in the first secondary flow path 21 and in the second secondary flow path 31. The rotary tool 1 therefore has good chip removal performance.

[0044] In particular, the path of the first secondary flow path 21 tends to become shorter when the first angle Θ1 is increased. The path of the second secondary flow path 31 tends to become shorter when the second angle Θ3 is increased. Path loss is reduced when the path of the first secondary flow path 21 or the second secondary flow path 31 is decreased. Consequently, a large volume of fluid flows out of the first secondary flow path 21 or the second secondary flow path 31. This results in a large force for pushing the chips out by the fluid flowing out of the first secondary flow path 21 or the second secondary flow path 31.

[0045] Meanwhile, the fluid flowing out of the first side flow path 21 tends to flow towards the second end 3b with a decreasing first angle Θ1. The fluid flowing out of the second side flow path 31 tends to flow towards the second end 3b with a decreasing second angle Θ3. Consequently, the chips carried away by the fluid tend to be carried consistently towards the second end 3b.

[0046] Suitable fluid control for the first bypass path 21 and the second bypass path 31 can be achieved by appropriately adjusting the magnitude of the first angle 1 and the second angle 3. The second angle Θ3 can be smaller than the helix angle Θ2, as shown in Fig. 10 non-restrictive embodiment shown.

[0047] The second angle Θ3 can be larger than the first angle Θ1, as in the non-restrictive embodiment described in Fig. 8 and Fig. Figure 10 illustrates this. If this configuration is fulfilled, a chip exit direction can be stabilized by having the fluid flow out of the first secondary flow path 21, which is located closer to the side of the first end 3a than the second secondary flow path 31. Furthermore, the chip evacuation velocity can be increased by having the fluid flow out of the second secondary flow path 31, which is located closer to the side of the second end 3b than the first secondary flow path 21.

[0048] A relationship between the first angle Θ1 and the second angle Θ3 is not limited to a relationship that the second angle Θ3 is larger than the first angle Θ1. For example, the second angle Θ3 can be smaller than the first angle Θ1, as in a non-restrictive embodiment of a rotary tool 1a described in Fig. Figure 13 shows that if this configuration is met, the chip output velocity can be increased by having the fluid flow from the first secondary flow path 21, which is located closer to the side of the first end 3a than the second secondary flow path 31. Furthermore, the chips tend to be output more consistently in the direction of the second end 3b if the fluid flows from the second secondary flow path 31, which is located closer to the side of the second end 3b than the first secondary flow path 21. Fig. 13 is a representation that is in Fig. This corresponds to the enlarged view shown in 10.

[0049] The second angle Θ3 can be evaluated in the same way as the first angle Θ1. That is, the second angle Θ3 can be evaluated in a state in which an angle formed by the rotation axis X and a central axis Q2 of the second bypass path 31 is maximized when the cutting part 5 is viewed from the direction orthogonal to the rotation axis X, as in the Fig. 10, the non-restrictive embodiment shown. The second angle Θ3 can, for example, be set to -20 degrees to 25 degrees.

[0050] The relationship between the first angle Θ1 and the second angle Θ3 is not limited to a relationship that the second angle Θ3 is larger or smaller than the first angle Θ1. For example, the second angle Θ3 can be equal to the first angle Θ1.

[0051] A first inner diameter of the first bypass path 21 may differ from a second inner diameter of the second bypass path 31, as in the non-restrictive embodiment described in Fig. 8 and Fig. Figure 10 is shown. If this configuration is fulfilled, it is possible to adjust the injection pressure of the fluid ejected from the first opening 23 and the second opening 33.

[0052] The second inner diameter can be larger than the first inner diameter, as in the non-restrictive embodiment described in Fig. 8 and Fig. Figure 10 is shown. If this configuration is met, the volume of fluid ejected from the second inner diameter can be increased to improve chip ejection performance near the second inner diameter.

[0053] This means it is possible to rephrase the equation so that the first inner diameter is smaller than the second inner diameter. If this configuration is met, the velocity of the fluid ejected from the first inner diameter can be increased.

[0054] The first inner diameter can be adjustable, for example, from 0.3 to 0.9 mm. The second inner diameter can be adjustable, for example, from 0.3 to 1.5 mm. The relationship between the first and second inner diameters is not limited to the second being larger than the first. For example, the second inner diameter can be smaller than or equal to the first.

[0055] The cutting part 5 may further have a second comb line 35, as in a non-restrictive embodiment described in Fig. 7 is shown. The second ridge line 35 is a ridge line that passes through the first groove 15 and the outer circumferential surface 11 adjacent to the first groove 15 on a front face in the direction of rotation Y in the Fig. The first opening 23 can be arranged closer to the first ridge line 17 than to the second ridge line 35, as shown in Figure 7. Fig. 8 non-restrictive embodiment shown. If these configurations are met, the fluid ejected from the first opening 23 can be ejected along the first ridge line 17 into the first groove 15, so that the chips produced by the first ridge line 17 can be removed in a suitable manner.

[0056] The cutting element 5 can have a further cutting edge in addition to the first cutting edge 13. The cutting element 5 can have a further groove in addition to the first groove 15. There can be one or more further cutting edges and further grooves. For example, the cutting element 5 can have a second cutting edge 37 and a second groove 39, as shown in Fig. 7, a non-restrictive embodiment. The second cutting edge 37 can be arranged from the first end 3a towards the outer circumferential surface 11, and the second groove 39 can extend helically from the second cutting edge 37 towards the second end 3b in the Fig. 7, non-restrictive embodiment shown.

[0057] A configuration of the second cutting edge 37 can be identical or different to a configuration of the first cutting edge 13. Similarly, a configuration of the second groove 39 can be identical to or different from a configuration of the first groove 15. In the non-restrictive embodiment described in Fig. As shown in Figure 7, the configuration of the second cutting edge 37 is identical to the configuration of the first cutting edge 13, and the configuration of the second groove 39 is identical to the configuration of the first groove 15. The second cutting edge 37 can be arranged such that, on the basis of the axis of rotation X1 in a front view from the side of the first end 3a, it has 180-degree rotational symmetry with respect to the first cutting edge 13.

[0058] Flow path 9 can further form a third secondary flow path 41 as in the Fig. 1 exhibit the non-restrictive embodiment shown. The third bypass path 41 can be located in the embodiment shown in Fig. In the non-restrictive embodiment shown in Figure 6, the fluid extends from the main flow path 19 towards the side of the second end 3b. The third secondary flow path 41 may have a third opening 43 that opens into the second groove 39. When these configurations are met, the fluid can be discharged towards the side of the second end 3b from the third opening 43 of the third secondary flow path 41 in addition to the first opening 23 of the first secondary flow path 21, resulting in improved chip discharge performance.

[0059] The third secondary flow path 41 can have a straight shape and extend from the second main flow path 19b to the side of the second end 3b, as shown in Fig. 6 shown in the non-restrictive embodiment. Alternatively, the third secondary flow path 41 can extend from the first main flow path 19a towards the side of the second end 3b.

[0060] The first opening 23 and the third opening 43 can be arranged in different positions along the axis of rotation X, as shown in Fig. 6 non-restrictive embodiment shown. When this configuration is fulfilled, the loads exerted on the first secondary flow path 21 and the third secondary flow path 41 and the loads exerted on the first opening 23 and the third opening 43 tend to be distributed in the direction along the axis of rotation X, so that it is possible to reduce the deterioration of the strength of the rotary tool 1, so that the rotary tool 1 is less likely to break.

[0061] The relationship between the first opening 23 and the third opening 43 in the direction along the axis of rotation X is not limited to the relationship that these two openings are arranged in different positions. For example, the first opening 23 and the third opening 43 can be arranged in the same position in the direction along the axis of rotation X.

[0062] In a non-restrictive embodiment, which in Fig. As shown in Figure 12, a third angle Θ4, formed by the axis of rotation X and the third bypass path 41, can be evaluated in the same way as the first angle Θ1. That is, the third angle Θ4 can be evaluated in a state where an angle formed by the axis of rotation X and a central axis Q3 of the third bypass path 41 is maximized when the cutting part 5 is viewed from the direction orthogonal to the axis of rotation X, as shown in Figure 12. Fig. 12, the non-restrictive embodiment shown. The third angle Θ4 can, for example, be set to -20 degrees to 25 degrees.

[0063] The third angle Θ4 can be smaller than the helix angle of the second groove 39 as shown in the Fig. 12 non-restrictive embodiment shown. In particular, the third angle Θ4 can be in the Fig. In the non-restrictive embodiment shown in Figure 12, the angle of helix is ​​smaller than a helix angle formed by the axis of rotation X and a third ridge line, wherein the third ridge line is a ridge line formed by the second groove 39 and the outer circumferential surface 11, which adjoins the second groove 39 on a rear side in the direction of rotation Y of the axis of rotation X. The third ridge line corresponds to the first ridge line 17 in the Fig. 12 non-restrictive embodiments shown.

[0064] As in the Fig. In the non-restrictive embodiment shown in Figure 12, if the third opening 43 is arranged closer to the side of the first end 3a than the first opening 23 in the direction along the axis of rotation X, in other words, if the third opening 43, the first opening 23 and the second opening 33 are arranged in this order from the side of the first end 3a to a side of the second end 3b in the direction along the axis of rotation X, the first angle Θ1, the second angle Θ3 and the third angle Θ4 can have a relationship such that the second angle Θ3 > the first angle Θ1 > the third angle Θ4.

[0065] As in a rotary tool 1b in a non-restrictive embodiment, which in Fig. As shown in Figure 14, the first opening 23 is arranged closer to the first end 3a in the direction along the axis of rotation X than the third opening 43. In other words, if the first opening 23, the third opening 43, and the second opening 33 are arranged in that order from the side of the first end 3a to the side of the second end 3b in the direction along the axis of rotation X, the first angle Θ1, the second angle Θ3, and the third angle Θ4 can have a relationship such that the second angle Θ3 > the third angle Θ4 > the first angle Θ1. Fig. 14 is a representation that is used in Fig. This corresponds to the side view shown in Figure 6.

[0066] The second angle Θ3 can be smaller than the first angle Θ1, as described above. In this case, the first angle Θ1, the second angle Θ3, and the third angle Θ4 can have the following relationship. That is, if the third opening 43, the first opening 23, and the second opening 33 are arranged in that order from the side of the first end 3a to the side of the second end 3b in the direction along the axis of rotation X, then the first angle Θ1, the second angle Θ3, and the third angle Θ4 can have a relationship such that the third angle Θ4 > the first angle Θ1 > the second angle Θ3.Alternatively, if the first opening 23, the third opening 43 and the second opening 33 are arranged in this order from the side of the first end 3a to the side of the second end 3b in a direction along the axis of rotation X, the first angle Θ1, the second angle Θ3 and the third angle Θ4 can have a relationship such that the first angle Θ1 > the third angle Θ4 > the second angle Θ3.

[0067] A first inner diameter of the first secondary flow path 21 can be smaller than an inner diameter of the main flow path 19, as shown in the Fig. 7 non-restrictive embodiment shown. If this configuration is fulfilled, the fluid pressure of the fluid expelled from the first opening 23 tends to be higher. For the same reason, a second inner diameter of the second secondary flow path 31 can be smaller than the inner diameter of the main flow path 19, and a third inner diameter of the third secondary flow path 41 can be smaller than the inner diameter of the main flow path 19, as shown in the Fig. 7 shown in the non-restrictive embodiment. The third inner diameter of the third bypass path 41 can, for example, be set to 0.3–2 mm.

[0068] Suitable materials for Base 3 include cemented carbide and cermet. Examples of cemented carbide compositions include WC-Co, WC-TiC-Co, and WC-TiC-TaC-Co, where WC, TiC, and TaC can be hard particles and Co can be a binder phase. The cermet can be a sintered composite material obtained by combining metal with a ceramic component. Examples of cermet include titanium compounds primarily composed of titanium carbide (TiC) or titanium nitride (TiN).

[0069] A surface of base 3 can be coated with a coating layer using a chemical vapor deposition (CVD) or physical vapor deposition (PVD) process. Examples of coating layer compositions include titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN), and aluminum oxide (Al₂O₃). <Verfahren zur Herstellung eines maschinell bearbeiteten Produkts>

[0070] A method for producing a machined or chip-removing product in a non-limiting embodiment of the present disclosure is described below with reference to the Fig. Figures 15 to 17 describe the case of using the above rotary tool 1 as an example.

[0071] The method for producing the machined product in the non-restrictive embodiment may comprise the following steps: (1) Rotating the rotary tool 1 about the axis of rotation X, (2) Bringing the first cutting edge 13 in the rotary tool 1 into contact with a workpiece 100 and (3) Moving the rotary tool 1 away from the workpiece 100.

[0072] More precisely, firstly, as in the Fig. In the non-restrictive embodiment shown in Figure 15, the rotary tool 1 can be brought relatively close to the workpiece 100 by moving the rotary tool 1 in a direction Z1 along the axis of rotation X while rotating the rotary tool 1 about the axis of rotation X.

[0073] Then, as in the Fig. In the non-restrictive embodiment shown in Figure 16, the workpiece 100 is cut by bringing the first cutting edge 13 of the rotary tool 1 into contact with the workpiece 100. In this case, the workpiece 100 can be cut while a fluid can flow out of the first opening 23.

[0074] After that, as in the Fig. In the non-restrictive embodiment shown in Figure 17, the machined product is obtained by moving the rotary tool 1 in a direction Z2, such that the rotary tool 1 is moved away from the workpiece 100 relative to the workpiece.

[0075] With the method for producing the machined product in the non-restrictive embodiment, the machined product with a high-precision machined surface is available using the rotary tool 1 with excellent chip removal performance.

[0076] In the Fig. In the non-restrictive embodiment shown in Figure 15, the rotary tool 1 can be brought close to the workpiece 100 in a state in which the workpiece 100 is fixed and the rotary tool 1 is rotated about the axis of rotation X. In the embodiment shown in Fig. In the non-restrictive embodiment shown in Figure 16, the workpiece 100 can be cut by bringing the first cutting edge 13 of the rotating tool 1 into contact with the workpiece 100. The rotating tool 1 can be moved away from the workpiece 100, as shown in Figure 16. Fig. 17 non-restrictive embodiment shown.

[0077] Although in the non-restrictive embodiment, which in Fig. As shown in Figures 15 to 17, the machined product is obtained by moving the rotary tool 1, but this is not intended to be the only way. For example, in step (1), the workpiece 100 can be brought close to the rotary tool 1. Likewise, in step (3), the workpiece 100 can be moved away from the rotary tool 1. If the cutting process is to be continued, the step of bringing the cutting edge 13 of the rotary tool 1 into contact with different sections of the workpiece 100 can be repeated while the rotary tool 1 remains rotated.

[0078] Examples of the material of workpiece 100 may include aluminium, unalloyed steel, alloy steel, stainless steel, cast iron and non-ferrous metals.

[0079] Although the rotary tools 1 and the methods for producing a machined product in the embodiments of the present disclosure have been described above by way of example, the present disclosure is not limited to the embodiments above. REFERENCE MARK LIST 1, 1a, 1b Rotary tool 3 Basic 3a first end (front end) 3b second end (rear end) 5 Cutting part 5a Middle 7 shaft section 9 Flow path 11 External perimeter area 13 first cutting edge (point edge) 15 first groove 17 first ridge line 19 Main flow path 19a first main flow path 19b second main flow path 19c Inlet opening 19d Outlet 21 first secondary flow path 23 first opening 25 first section 27 second section 29 border 31 second secondary flow path 33 second opening 35 second ridge line 37 second cutting edge (point edge) 39 second groove 41 third secondary flow path 43 third opening 100 workpieces Q1 Central axis of the first secondary flow path Q2 Central axis of the second bypass path Q3 Central axis of the third secondary flow path X axis of rotation Y direction of rotation Z Cutting direction< / rotationswerkzeuge>

Claims

[1] A rotary tool (1, 1a, 1b) comprising: a base (3) which has a rod shape and extends along an axis of rotation (X) from a first end (3a) to a second end (3b), where the base (3) a cutting part (5) arranged to have the first end (3a), a shaft part (7) which is arranged closer to one side of the second end (3b) than the cutting part (5), and a flow path (9) that is arranged within the base (3) and extends along the axis of rotation (X), the cutting part (5) has an outer perimeter area (11), a first cutting edge (13) which is arranged from the first end (3a) in the direction of the outer circumferential surface (11), a first groove (15) extending helically from the first cutting edge (13) towards one side of the second end (3b), and a first ridge line (17) formed by the first groove (15) and the outer circumferential surface (11), which is adjacent to the first groove (15) on a rear side in a direction of rotation (Y) of the axis of rotation (X), the flow path (9) a main flow path (19) extending from one side of the second end (3b) to one side of the first end (3a), and a first secondary flow path (21) extending from the main flow path (19) towards one side of the second end (3b), the first secondary flow path (21) has a first opening (23) which leads into the first groove (15), a first angle (Θ1) formed by the axis of rotation (X) and the first sideflow path (21) is smaller than a skew angle (Θ2) formed by the axis of rotation (X) and the first crest line (17), and the first angle (Θ1) is set to 0 degrees to 25 degrees [2] The rotary tool (1, 1a, 1b) according to claim 1, wherein the first opening (23) is arranged in a direction along the axis of rotation (X) closer to the first end (3a) than a center (5a) of the cutting part (5). [3] The rotary tool (1, 1a, 1b) according to claim 1 or 2, wherein the first ridge line (17) a first section (25) and a second section (27) which is located closer to one side of the second end (3b) than the first section (25), and a first helix angle (Θ2a) formed by the axis of rotation (X) and the first section (25) differs from a second helix angle (Θ2b) formed by the axis of rotation (X) and the second section (27). [4] The rotary tool (1, 1a, 1b) according to claim 3, wherein the first helix angle (Θ2a) is larger than the second helix angle (Θ2b). [5] The rotary tool (1, 1a, 1b) according to claim 3 or 4, wherein the first opening (23) is arranged near a boundary (29) between the first section (25) and the second section (27). [6] The rotary tool (1, 1a, 1b) according to any one of claims 1 to 5, wherein the flow path (9) further has a second secondary flow path (31) which is located closer to one side of the second end (3b) than the first secondary flow path (21) and extends from the main flow path (19) towards the side of the second end (3b), the second bypass path (31) has a second opening (33) which leads into the first groove (15), and a second angle (Θ3), formed by the axis of rotation (X) and the second bypass path (31), differs from the first angle (Θ1). [7] The rotary tool (1, 1a, 1b) according to claim 6, wherein the second angle (Θ3) is smaller than the first angle (Θ1). [8] The rotary tool (1, 1a, 1b) according to any one of claims 1 to 7, wherein the flow path (9) further has a second secondary flow path (31) which is located closer to one side of the second end (3b) than the first secondary flow path (21) and extends from the main flow path (19) towards the side of the second end (3a), the second bypass path (31) has a second opening (33) which leads into the first groove (15), and a first inner diameter of the first bypass path (21) differs from a second inner diameter of the second bypass path (31). [9] The rotary tool (1, 1a, 1b) according to claim 8, wherein the second inner diameter is larger than the first inner diameter. [10] The rotary tool (1, 1a, 1b) according to any one of claims 1 to 9, wherein the cutting part (5) further has a second ridge line (35) formed by the first groove (15) and the outer circumferential surface (11), which is adjacent to the first groove (15) on a front side in the direction of rotation (Y), and the first opening (23) is located closer to the first ridge line (17) than to the second ridge line (35). [11] The rotary tool (1, 1a, 1b) according to any one of claims 1 to 10, wherein the cutting part (5) further has a second cutting edge (37) which is arranged from the first end (3a) in the direction of the outer circumferential surface (11), and a second groove (39) extending helically from the second cutting edge (37) towards the second end (3b), the flow path (9) further has a third secondary flow path (41) extending from the main flow path (19) towards one side of the second end (3b), the third bypass path (41) has a third opening (43) which opens into the second groove (39), and the first opening (23) and the third opening (43) are arranged at different positions in one direction along the axis of rotation (X). [12] A method for producing a machine-made product, comprising: Rotating the rotary tool (1, 1a, 1b) according to any one of claims 1 to 11, Bringing the rotary tool (1, 1a, 1b) into contact with a workpiece (100) and Moving the rotary tool (1, 1a, 1b) away from the workpiece (100).

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