Gear cutting tool components and gear cutting tool using the same

Abstract

To provide gear cutting tool components that can properly discharge chips generated during cutting when machining an internal gear, and a gear cutting tool using the same.SOLUTION: Gear cutting tool components 3, 4 serve for fastening together a disk-shaped gear cutting tool body 2 having a plurality of cutting edges 21 on an outer surface thereof and a shaft-shaped tool-body attachment 1. The gear cutting tool components 3, 4 each include a bolt component 4 having: a threaded portion 4A at one end side that fits into a shaft of the tool-body attachment 1; and a bolt head 4B with a hexagonal hole 43 at the other end side. The bolt component 4 is internally provided with: an axially formed oil hole 41; and a plurality of oil holes 42 extending radially from the axial oil hole 41 as a starting point.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a gear cutting tool component that can be attached to and detached from a gear cutting tool such as a skiving cutter or a pinion cutter, and to a gear cutting tool using the gear cutting tool component. [Background technology]

[0002] Conventionally, when cutting gears using a gear cutting tool, coolant is supplied from the machine tool side, or the coolant is discharged from the machine tool side to the gear cutting tool and the workpiece through an oil hole (a flow path for the coolant) provided in the gear cutting tool body (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2021-154443 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when machining internal gears, coolant is sometimes supplied from the outside or from the gear cutting tool itself to the outside. In such cases, chips generated during cutting remain inside the workpiece and cannot be discharged to the outside, which is a problem. In addition, when chips generated during internal gear machining remain inside the workpiece, they can become caught between the trapped chips and the gear cutting tool, causing abnormal damage to the cutting edge of the gear cutting tool.

[0005] Therefore, an object of the present invention is to provide a gear cutting tool component that can properly discharge chips generated during cutting, particularly when machining internal gears, to the outside, and a gear cutting tool using the same. [Means for solving the problem]

[0006] The gear cutting tool part of the present invention is a gear cutting tool part for fastening together a disk-shaped gear cutting tool body having a plurality of cutting edges on its outer peripheral surface and a shaft-shaped tooling, and the gear cutting tool part has a bolt part having a threaded portion at one end that is fitted into the shaft of the tooling and a bolt head with a hexagonal socket at the other end, and the inside of the bolt part is provided with an oil hole formed in the axial direction and a plurality of oil holes extending radially from the axial oil hole.

[0007] The invention also relates to a gear cutting tool having a disk-shaped gear cutting tool body with multiple cutting edges on its outer peripheral surface, an axial tooling, a ring component with a through hole in the center, and a bolt component with a threaded portion at one end that fits into the axis of the tooling and a bolt head with a hexagonal socket at the other end, wherein the gear cutting tool body is fastened to the tooling using the threaded portion with the bolt head fitted into the through hole of the ring component, and the opening of the oil hole provided radially from the central axis of the bolt component to the threaded portion is connected to the opening on the inner surface of the oil hole provided radially from the inner surface of the through hole of the ring component. [Effects of the Invention]

[0008] The gear cutting tool component and gear cutting tool using the same of the present invention comprise a disk-shaped gear cutting tool body with multiple cutting edges on its outer periphery, a shaft-shaped tooling, a ring component with a central through-hole, and a bolt component with a threaded portion at one end that fits into the tooling shaft and a bolt head with a hexagonal socket at the other end. The gear cutting tool body is fastened to the tooling using the threaded portion with the bolt head fitted into the through-hole of the ring component. The opening of an oil hole extending radially from the central axis of the bolt component to the threaded portion is connected to the opening of an oil hole extending radially from the inner periphery of the through-hole of the ring component. This allows compressed air and coolant from the machine tool to be appropriately supplied to the cutting edges and rake surfaces of the gear cutting tool component. This allows chips generated during cutting to be appropriately discharged to the outside when machining an internal gear. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic cross-sectional view of a gear cutting tool 10 according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] A gear cutting tool component and a gear cutting tool using the same according to the present invention will be described with reference to the drawings. FIG. 1 shows a schematic cross-sectional view of a gear cutting tool 10 according to one embodiment of the present invention. As shown in FIG. 1, the gear cutting tool 10 according to the present invention is a tool having a rotational body shape (annular shape) formed around a rotation center O. As shown in FIG. 1, the gear cutting tool 10 is formed at least from each of the following components: a tooling 1, a gear cutting tool body 2, a ring component 3, and a bolt component 4. These components will be described in detail below.

[0011] Touring 1 The tooling 1 is a shaft-shaped part for attaching a gear cutting tool body 2 (described later) to a machine tool. One end of the tooling 1 is attached to the machine tool, and the other end is configured to attach the gear cutting tool body 2 (described later). An oil flow path 11 is formed in the center of the tooling 1 along the longitudinal direction (parallel to the rotation center O). An internal thread can also be provided on the other end of the tooling 1 for fastening to a threaded portion 4A of a bolt part 4 (described later).

[0012] Gear cutting tool body 2 The gear cutting tool body 2 is a tool equipped with a plurality of cutting edges 21 used for gear machining, and as shown in Fig. 1, the plurality of cutting edges 21 are arranged in an annular shape around the rotation center O. A through hole 22 is provided in the center of the gear cutting tool body 2 for inserting a threaded portion 4A of a bolt part 4, which will be described later.

[0013] Ring part 3 1, the ring component 3 is an annular component with a through hole 32 in the center. This through hole 32 is a hole for inserting a bolt component 4 described later, and is provided with a step for accommodating the entire bolt head 4B of the bolt component 4. In other words, the through hole 32 has a small diameter portion with a diameter that allows the threaded portion 4A of the bolt component 4 described later to be inserted therein, and a large diameter portion with a diameter that allows the entire bolt head 4B of the bolt component 4 to be accommodated therein.

[0014] 1, a plurality of oil holes 31 are formed radially in the through hole 32 of the ring component 3, with their openings on the inner peripheral surface of the through hole 32. As shown in FIG. 1, the openings on one end of these plurality of oil holes 31 are on the inner peripheral surface of the through hole 32, and the openings on the other end are formed on the outer peripheral surface of the ring component 3.

[0015] Bolt part 4 The bolt part 4 is a part formed by a threaded portion 4A and a bolt head 4B as shown in Fig. 1. The bolt part 4 is used to fix the gear cutting tool body 2 to the tooling 1 via the ring part 3 described above. Specifically, the threaded portion 4A and the bolt head 4B of the bolt part 4 are passed through the through hole 32 of the ring part 3, and then the threaded portion 4A is passed through the through hole 22 of the gear cutting tool body 2, and finally the threaded portion 4A of the bolt part 4 is screwed into a threaded portion (internal thread portion) provided at the center of the tooling 1.

[0016] This screwing operation presses the inner surface (inner peripheral surface) of the gear cutting tool body 2 against the end face of the ring component 3, fastening the gear cutting tool body 2 to the tooling 1. When screwing the threaded portion 4A of the bolt component 4 into the internally threaded portion of the tooling 1, a hexagonal hole 43 is provided in the bolt head 4B of the bolt component 4 as shown in Figure 1, so that the gear cutting tool body 2 can be easily fastened to the tooling 1 by using a fastening tool such as a hexagonal wrench.

[0017] 1, the center of the shaft of the threaded portion 4A of the bolt part 4 is provided with a first oil hole 41 formed in the axial direction (longitudinal direction) of the threaded portion 4A and a second oil hole 42 formed radially from the center of the shaft of the threaded portion 4A. The first oil hole 41 has an opening at the end of the threaded portion 4A and is formed as a linear flow path from the opening toward the bolt head 4B. The second oil holes 42 are connected to one end of the first oil hole and are formed in multiple numbers radially from the connecting part toward the radial direction of the threaded portion 4A. Therefore, the second oil holes 42 have openings in the surface of the threaded portion 4A in the same number as the number of the flow paths formed radially.

[0018] Fluid Flow Next, we will explain a method for discharging a fluid (air or coolant) using the gear cutting tool 10 shown in Fig. 1. The flow (direction) of the fluid from the machine tool (not shown) toward the gear cutting tool 10 is indicated as Y1, the flow (direction) of the fluid inside the gear cutting tool 10 is indicated as Y2, and the flow (direction) of the fluid from the inside of the gear cutting tool 10 toward the outside of the gear cutting tool 10 is indicated as Y3.

[0019] First, a fluid (air or coolant) supplied from the machine tool (not shown) is pumped along the direction of arrow Y1 shown in FIG. 1 from the main body of the machine tool through an oil flow path 11 provided in the tooling 1 toward a first oil hole 41 provided in the threaded portion 4A of the bolt part 4.

[0020] When the fluid (air or coolant) that flows from the oil flow path 11 of the tooling 1 into the first oil hole 41 reaches the boundary between the first oil hole 41 and the second oil hole 42, the fluid (air or coolant) is dispersed along the multiple radially arranged second oil holes 42 and flows from the bolt part 4 toward the ring part 3 in the direction of arrow Y2 shown in Figure 1.

[0021] 1, the openings of the second oil hole 42 provided in the threaded portion 4A of the bolt component 4 and the multiple oil holes 31 formed in the through hole 32 of the ring component 3 are connected (closely attached) to each other. Therefore, the fluid (air or coolant) that comes out of the opening of the second oil hole 42 in the threaded portion 4A continues to flow into the openings of the multiple oil holes 31 formed in the through hole 32 of the ring component 3 along the direction of arrow Y2 shown in FIG.

[0022] The fluid (air or coolant) that flows into the oil hole 31 in the ring component 3 then flows toward the opening of the oil hole 31 formed in the outer peripheral surface of the ring component 3, and is ultimately discharged in the direction of arrow Y3 shown in Fig. 1. The opening of the oil hole 31 formed in the outer peripheral surface of the ring component 3 faces (opposes) the inner peripheral surface of the gear cutting tool body 2 or the rake face of the cutting edge 21 of the gear cutting tool body 2, as shown in Fig. 1.

[0023] Therefore, the fluid (air or coolant) discharged from the opening of the oil hole 31 formed on the outer surface of the ring part 3 is appropriately supplied to the rake face and cutting edge of the cutting edge 21 of the gear cutting tool body 2, so that chips generated during gear machining (especially internal gears) can be discharged to the outside of the workpiece without being retained inside the workpiece.

[0024] In addition, chips generated during gear machining (especially internal gears) are discharged outside the workpiece, preventing the chips generated during internal gear machining from getting caught in the gear cutting tool, greatly contributing to improving the life of the gear cutting tool.

[0025] The alignment (so-called phase alignment) of the opening of the second oil hole 42 provided in the threaded portion 4A of the bolt part 4 with the multiple oil holes 31 formed on the inner surface of the through hole 32 of the ring part 3 can be achieved by providing reference lines for each oil hole 31, 42 in the bolt part 4 and the ring part 3, and then fastening the ring part 3 with the bolt part 4 so that these reference lines are aligned with each other when the ring part 3 is fixed. [Explanation of symbols]

[0026] 1. Touring 2 Gear cutting tool body 3 Ring parts 4 bolt parts 4A Threaded part 4B Bolt head 10 Gear cutting tools 11 Oil flow path 21 cutting edge 31 Oil hole 32 through holes 41 1st oil hole 42 2nd oil hole 43 Hexagonal hole O Center of rotation Y1 Fluid flow Y2 Fluid flow Y3 Fluid Flow

Claims

1. A gear cutting tool component for fastening together a disk-shaped gear cutting tool body having a plurality of cutting edges on its outer peripheral surface and a shaft-shaped tooling, the gear cutting tool component having a bolt component at one end with a threaded portion that fits into the shaft of the tooling and at the other end with a bolt head having a hexagonal socket, the gear cutting tool component being characterized in that the bolt component has an axial oil hole formed inside and a plurality of radial oil holes that extend from the axial oil hole as a starting point.

2. 2. The gear cutting tool part according to claim 1, further comprising a ring part having a through hole in the center, the ring part being provided with a plurality of oil holes extending radially from the inner peripheral surface of the through hole.

3. A gear cutting tool comprising: a disk-shaped gear cutting tool body having a plurality of cutting edges on its outer peripheral surface; an axial tooling; a ring component having a through hole in its center; and a bolt component having a threaded portion at one end that fits into the axis of the tooling and a bolt head with a hexagonal socket at the other end, wherein the gear cutting tool body is fastened to the tooling using the threaded portion with the bolt head fitted into the through hole of the ring component; and wherein the opening of an oil hole extending radially from the central axis of the bolt component to the threaded portion is connected to the opening of an oil hole extending radially from the inner peripheral surface of the through hole of the ring component on the inner peripheral surface side.

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