Assembly-type skiving cutter

Abstract

To address the conventional problem of an increase in number of components to be prepared as tooling must be prepared for each change in shape of a skiving cutter.SOLUTION: An assembly-type skiving cutter 1 comprises: an annular body component 10 having a through-hole 11 on the center; a machining tooth component 20 having a cutting edge disposed around the body component 10; a machining tooth fixing component 30 that fixes the machining tooth component 20 to the body component 10; and a tooling 40 provided with a through-hole 41 formed along a rotary shaft O and a projected part 42 fitted in the through-hole 11 of the body component 10. Through fixing to the tooling 40 using a fixing bolt 50 inserted into the through-hole 11 of the body component 10, oil paths 12 and 13 are provided radially from the through-hole 11 of the body component 10.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an assembly-type skiving cutter for machining gears by cutting. [Background technology]

[0002] There are two types of skiving cutters and gear machining jigs using the same: a type that supplies coolant from the machine tool side, and a type that has a function of flowing coolant in the skiving cutter itself. In particular, the type that has a function of flowing coolant in the skiving cutter itself has various forms, such as discharging coolant from a discharge hole of a tooling or fastening jig as disclosed in Patent Documents 1 to 3. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2021-154443 A [Patent Document 2] JP 2023-007256 A [Patent Document 3] Patent Publication No. 2021-013963 Summary of the Invention [Problem to be solved by the invention]

[0004] However, such skiving cutters require the provision of dedicated flow paths such as holes and grooves for the coolant in the tooling, which poses the problem of the expense of producing dedicated tooling.In addition, when the shape of the skiving cutter changes, it is necessary to prepare a corresponding tooling for each shape of the skiving cutter, which increases the number of parts that need to be prepared.

[0005] Therefore, the present invention has an objective of providing an assembled skiving cutter that sprays coolant (cooling liquid) from the inside to the outside, which does not require the provision of coolant holes or passages in the tooling (main shaft part) and can be adapted with a single tooling even if the shape of the cutting edge is changed. [Means for solving the problem]

[0006] The assembled skiving cutter of the present invention has an annular main body part having a through hole in the center, a cutting tooth part having cutting edges arranged around the main body part, and a teeth fixing part for fixing the cutting tooth part to the main body part, and the main body part is provided with oil passages formed radially from the through hole toward the outer periphery. This oil passage can be a first oil passage that leads from the through hole to the cutting tooth part and the teeth fixing part in a cross-sectional view parallel to the rotation axis of the assembled skiving cutter.

[0007] The cutting teeth fixing component may be provided with a second oil passage penetrating from the rotation shaft toward the outer periphery of the assembled skiving cutter in a cross-sectional view parallel to the rotation shaft of the assembled skiving cutter, so that the opening of the first oil passage and the opening of the second oil passage are in close contact with each other. Furthermore, the main body component may further have a third oil passage formed radially from the through hole toward the outer periphery and longer than the second oil passage.

[0008] In the invention of the gear machining jig using the assembled skiving cutter, the jig is formed from a tooling (main shaft part) provided with a protrusion for mounting the assembled skiving cutter, and a fixing bolt for fitting and fixing the assembled skiving cutter into the protrusion of the tooling. A through hole is formed in the shaft of the tooling along the longitudinal direction, and a blind hole is formed in the shaft of the fixing bolt along the longitudinal direction, and a through hole is formed in the radial direction of the fixing bolt. The through hole of the tooling, the blind hole of the fixing bolt, the through hole of the fixing bolt, and the through hole of the main body part can also be connected to each other. Effect of the Invention

[0009] The assembled skiving cutter of the present invention is an assembled skiving cutter having an annular main body part with a through hole in the center, a cutting tooth part with cutting edges arranged around the main body part, and a cutting tooth fixing part that fixes the cutting tooth part to the main body part.By providing the main body part with oil passages formed radially from the through hole toward the outer periphery, the cutting edges can be cooled by ejecting coolant supplied from the machine tool from the main body part toward the cutting tooth part, so there is no need to provide coolant holes or passages in the tooling, and a single tooling can be used to accommodate changes to the shape of the cutting edges. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic cross-sectional view of an assembly-type skiving cutter 1 according to the present invention. [Diagram 2] 2 is a cross-sectional view taken along line AA of the assembled skiving cutter 1 shown in FIG. 1. [Diagram 3] 2 is a cross-sectional view of the assembly type skiving cutter 1 shown in FIG. 1 along line BB. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] A skiving cutter according to one embodiment of the present invention will be described with reference to the drawings. A schematic cross-sectional view (along a rotation axis O) of an assembled skiving cutter 1 according to one embodiment of the present invention is shown in Fig. 1, a cross-sectional view of the assembled skiving cutter 1 shown in Fig. 1 taken along line AA is shown in Fig. 2, and a cross-sectional view of the assembled skiving cutter 1 taken along line BB is shown in Fig. 3.

[0012] An assembled skiving cutter 1, which is one embodiment of the present invention, is formed from a circular main body part 10 having a through hole 11 in the center, a cutting tooth part 20 having cutting edges arranged around the main body part 10, a cutting tooth fixing part 30 that fixes the cutting tooth part 20 to the main body part 10, and a tooling (spindle part) 40 having a through hole 41 formed along the rotation axis O and a protrusion 42 that fits into the through hole 11 of the main body part 10, as shown in Figure 1.

[0013] This main body part 10 is fixed in a state where it is inserted into a through hole 41 of the tooling 40 by using a fixing bolt 50 inserted in a state where it penetrates the through hole 11. In addition, the main body part 10 is provided with a plurality of oil passages 12, 13 formed radially from the through hole 11 toward the outer periphery (radial direction) of the assembled skiving cutter 1 as shown in Figs. 2 and 3 .

[0014] Next, a description will be given of the multiple oil passages 12, 13. As shown in Fig. 1, the oil passages 12, 13 include a first oil passage 12 that leads from the through hole 11 of the main body part 10 to the machining tooth fixing part 30 side in a cross section parallel to the rotation axis O of the assembled skiving cutter 1, and a third oil passage 13 that is formed radially from the through hole 11 of the main body part 10 toward the outer periphery and is longer than the first oil passage 12.

[0015] 1 and 2, the machining teeth fixing part 30 has a second oil passage 31 penetrating from the rotation axis O of the assembled skiving cutter 1 toward the outer circumferential direction (of the assembled skiving cutter 1), and the opening of the first oil passage 12 formed in the main body part 10 and the opening of the second oil passage 31 are in close contact with each other. As a result, the cooling liquid supplied from the machine tool body is directly sprayed onto the rake face of the cutting edge of the machining teeth part 20 from the through hole 41 of the tooling 40 through the blind hole 51 provided in the shaft of the fixing bolt 50 along the longitudinal direction and the blind hole 51 along the radial direction (of the fixing bolt 50) via the through hole 52, the through hole 11 of the main body part 10 and the first oil passage 12 of the main body part 10, via the second oil passage 31 of the machining teeth fixing part 30.

[0016] Furthermore, the cooling liquid supplied from the through hole 11 of the main body part 10 also flows into the third oil passage 13 of the main body part 10 as shown in Figures 1 and 3, and is sprayed directly toward the workpiece from an opening provided on the side surface of the main body part 10.

[0017] As described above, the assembled skiving cutter of the present invention has oil passages formed radially from a through hole in the main body part toward the outer periphery, so that the coolant supplied from the machine tool is discharged from the main body part toward the machining tooth part and the cutting edge (scooping face) can be directly cooled. This means that there is no need to provide coolant holes or passages in the tooling, and the same tooling can be used even if the shape of the cutting edge is changed. [Explanation of symbols]

[0018] 1 Assembled skiving cutter 10 Main body parts 11 Through holes in body parts 12 1st oilway 13 3rd oilway 20 Machined tooth parts 30 Machining tooth fixing parts 31 2nd oilway 40 Tooling (spindle parts) 41 Tooling Through Hole 42 Touring protrusions 50 Fixing bolt 51 Fixing bolt blind hole 52 Fixing bolt through hole O Rotation axis

Claims

1. An assembled skiving cutter having an annular main body part having a through hole in the center, a cutting tooth part having cutting edges arranged around the main body part, a cutting tooth fixing part for fixing the cutting tooth part to the main body part, and a tooling having a through hole formed along a rotation axis and a protrusion to be fitted into the through hole of the main body part, wherein the main body part is fixed to the tooling using a fixing bolt that passes through the through hole of the main body part, and the main body part is further provided with a plurality of oil passages formed radially from the through hole of the main body part toward the outer periphery.

2. The assembled skiving cutter according to claim 1, characterized in that the oil passage has a first oil passage that leads from a through hole of the main body part to the machining tooth fixing part side in a cross-sectional view parallel to the rotation axis of the assembled skiving cutter.

3. The assembled skiving cutter as described in claim 2, characterized in that the machining tooth fixing part has a second oil passage that penetrates from the rotation axis toward the outer periphery of the assembled skiving cutter in a cross-sectional view parallel to the rotation axis of the assembled skiving cutter, and an opening of the first oil passage and an opening of the second oil passage are in close contact with each other.

4. The assembled skiving cutter according to claim 2 or 3, characterized in that the main body part further has a third oil passage formed radially from the through hole of the main body part toward the outer periphery and longer than the first oil passage.

5. The assembled skiving cutter according to claim 4, characterized in that a blind hole is formed in the shaft of the fixing bolt along the longitudinal direction, and a through hole is formed in the shaft of the fixing bolt along the radial direction of the fixing bolt, communicating with the blind hole.

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