Skiving cutter and gear machining jig using the same

Abstract

To provide a skiving cutter capable of machining a gear with high precision which has been difficult conventionally because a conventional skiving cutter (skiving cutter with a through hole formed in the central part) is subjected to final machining (polishing) of inner surface machining of the through hole after rough grinding of the annular machining teeth in the manufacturing process, which causes machining precision of the through hole, especially an accurate position of the center position to vary among the individual machining gears, which significantly impacts on the machining precision of the gear.SOLUTION: A skiving cutter 13 is arranged with machining teeth 12 annularly around a body part 10 centered on a rotation axis O10, and is provided with a protrusion 11 protruding toward one side of the body part 10. A gear machining jig 60 comprises: the skiving cutter 13; and a tooling T10 formed with a recess T11 to be attached with the skiving cutter 13. In the gear machining jig 60, the protrusion 11 of the skiving cutter 13 is embedded in the recess T11 of the tooling T10.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a skiving cutter for machining gears by cutting, and a gear machining jig using the same. [Background technology]

[0002] Conventional disk-type (bell-type) skiving cutters 100 have multiple machining teeth around a rotation axis O100 as shown in FIG. 4, and when using the skiving cutter 100 with a machine tool, a through hole H is provided in the center as shown in FIG. 4, a bolt is inserted into the through hole, and the skiving cutter 100 is fixed to a dedicated tooling (jig) to perform gear machining (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6455704 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the manufacturing process of a skiving cutter 100 having a through hole H formed in the center as shown in Fig. 4, the annular machining teeth (cutting edges) are roughly ground and then the inner surface of the through hole is finished (polished), so the machining accuracy of the through hole, especially the exact position (reference) of the center position, varies from one piece to another. As a result, there was a problem in that the machining accuracy of the gear, which is the workpiece, (tooth profile, tooth trace, pitch, runout amount, etc.) was also significantly affected by the machining accuracy of the through hole in the center.

[0005] Therefore, an object of the skiving cutter of the present invention is to provide a skiving cutter that can process a gear, which is a workpiece, with high precision when machining the workpiece into a gear. [Means for solving the problem]

[0006] The skiving cutter of the present invention has cutting teeth arranged in an annular shape around a main body with a rotation axis (central axis) as the center, and the main body is provided with a protrusion that protrudes to one side toward the direction of the rotation axis. The main body can also be further provided with either a through hole or a key groove.

[0007] Regarding the invention of a gear cutting jig using the above-mentioned skiving cutter, the gear cutting jig has the skiving cutter and a tooling provided with a recess for mounting the skiving cutter, and the convex portion of the skiving cutter is fitted into the recess of the tooling.

[0008] In addition, the tooling may further be provided with a key portion, so that the convex portion of the skiving cutter is fitted into the concave portion of the tooling, and the key portion of the tooling is fitted into the key groove of the skiving cutter, thereby forming a gear machining jig.

[0009] Alternatively, the tooling may further be provided with a screw hole, the convex portion of the skiving cutter may be fitted into the concave portion of the tooling, and the bolt may be fitted into the screw hole of the tooling through the through hole of the skiving cutter to form a gear machining jig. Effect of the Invention

[0010] The skiving cutter of the present invention can be processed based on the center hole throughout the entire manufacturing process, and can produce a skiving cutter with high processing accuracy. In addition, by providing a protrusion used when fitting with tooling on one side (upper part) of the main body, it can always be fitted into the recess (hole) of the tooling with a fixed reference, so that the center axis can always be maintained during gear processing, and the gear, which is the workpiece, can be processed with high precision when processing the workpiece. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a schematic cross-sectional view of a gear cutting tool 60 (first embodiment) of the present invention. [Diagram 2] FIG. 2 is a schematic cross-sectional view of a gear cutting tool 70 (second embodiment) of the present invention. [Diagram 3] FIG. 2 is a schematic cross-sectional view of a gear cutting tool 80 (third embodiment) of the present invention. [Figure 4] FIG. 1 is a schematic cross-sectional view of a conventional skiving cutter 100. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The skiving cutter of the present invention will be described with reference to the drawings. A schematic cross-sectional view of a skiving cutter 13 according to a first embodiment of the present invention and a gear cutting jig 60 using the skiving cutter 13 is shown in Fig. 1, a schematic cross-sectional view of a skiving cutter 23 according to a second embodiment and a gear cutting jig 70 using the skiving cutter 23 is shown in Fig. 2, and a schematic cross-sectional view of a skiving cutter 33 according to a third embodiment and a gear cutting jig 80 using the skiving cutter 33 is shown in Fig. 3.

[0013] The skiving cutter 13 of the first embodiment of the present invention is a tool having a rotating body shape (annular) formed around a rotation axis O10 as shown in Figure 1, and is broadly composed of a circular main body portion (holder) 10, a plurality of machining teeth (cutting edges) 12 formed around the main body portion 10, and a convex portion 11 protruding from the main body portion 10 to one side.

[0014] In addition, with regard to the invention of a gear cutting jig 60 having the above-mentioned skiving cutter 13 and a tooling T10 with a recess T11 provided for mounting the skiving cutter 13, the convex portion 11 of the skiving cutter 13 is fitted into the recess (blind hole or through hole) T11 of the tooling T10, and then fixed to through holes H10, H11 provided in the main body 10 of the skiving cutter 13 using a plurality of bolts B10, B11.

[0015] Next, the skiving cutter 23 of the second embodiment of the present invention is a tool having a rotating body shape (annular) formed around a rotation axis O20 as shown in Figure 2, similar to the skiving cutter 13 of the first embodiment shown in Figure 1, and is broadly composed of a circular main body portion 20, a plurality of machining teeth (cutting edges) 22 formed around the main body portion 20, and a convex portion 21 protruding from the main body portion 20 to one side.

[0016] In addition, with regard to the invention of a gear cutting jig 70 having the above-mentioned skiving cutter 23 and a tooling T20 with a recess T21 provided for mounting the skiving cutter 23, the convex portion 21 of the skiving cutter 23 is fitted into the recess (blind hole or through hole) T21 of the tooling T20, and then fixed using a pin P20 in the through hole H20 provided in the main body 20 of the skiving cutter 23, and using a key portion J20 and a bolt B20 in the key groove K20 provided in the main body 20.

[0017] Next, the skiving cutter 33 of the third embodiment of the present invention is a tool having a rotating body shape (annular) formed around a rotation axis O30 as shown in Figure 3, similar to the skiving cutter 13 of the first embodiment shown in Figure 1, and is broadly composed of a circular main body portion 30, a plurality of machining teeth (cutting edges) 32 formed around the main body portion 30, and a convex portion 31 protruding from the main body portion 30 to one side.

[0018] In addition, with regard to the invention of a gear cutting jig 80 having the above-mentioned skiving cutter 33 and a tooling T30 with a recess T31 for mounting the skiving cutter 33, the convex portion 31 of the skiving cutter 33 is fitted into the recess (blind hole or through hole) T31 of the tooling T30, and is fixed using a single bolt B30 in a through hole H30 provided near the center of the main body 30 of the skiving cutter 33. [Explanation of symbols]

[0019] 10, 20, 30 (Skiving cutter) body 11,21,31 Convex 12, 22, 32 Cutting edge 13,23,33 Skiving cutter 60,70,80 Gear processing jig T10, T20, T30 Touring T11, T21, T31 recess O10, O20, O30 Rotation axis

Claims

1. A skiving cutter in which machining teeth are arranged in a circular ring shape around a main body portion centered on a rotation axis, characterized in that the main body portion has a convex portion protruding to one side toward the direction of the rotation axis.

2. The skiving cutter according to claim 1, characterized in that the body portion is further provided with at least one of a through hole or a key groove.

3. A gear cutting jig comprising the skiving cutter of claim 1 and a tooling having a recess for mounting the skiving cutter, wherein the convex portion of the skiving cutter is fitted into the recess of the tooling.

4. A gear cutting jig comprising the skiving cutter of claim 2 and a tooling having a recess for mounting the skiving cutter, wherein the tooling further has a key portion, the convex portion of the skiving cutter is fitted into the recess of the tooling, and the key portion of the tooling is fitted into the key groove of the skiving cutter.

5. A gear cutting jig comprising the skiving cutter of claim 2 and a tooling having a recess for mounting the skiving cutter, wherein the tooling further has a screw hole, a convex portion of the skiving cutter is fitted into the recess of the tooling, and a bolt is fitted into the screw hole of the tooling through a through hole of the skiving cutter.

Images