Skiving cutter

Abstract

To solve the problem of conventional skiving cutters, in which jamming often occurs between the skiving cutter and the chips to adversely affect tooth surface properties, tooth profile accuracy of work-pieces, and eventually a tool life due to a topping specification being a countermeasure against burrs that may be generated at a tooth tip of the workpiece, because the skiving cutter constituting region from the tooth top to the tooth root of the machining tooth in the topping specification acts continuously, resulting in the chips generated by machining become long and hardly discharged to the outside.SOLUTION: A skiving cutter 10 has a plurality of machining teeth 1-5 annularly arranged around a rotational axis. The skiving cutter 10 according to the present invention, has solved the problem to be solved by a configuration thereof where slots M1 and M2 are provided in every other one of tooth roots 11-14 of the plurality of neighboring machining teeth 1-5. These slots 11-14 can be also provided in every other two or three of neighboring tooth roots.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a skiving cutter for machining gears by cutting. [Background technology]

[0002] Conventionally, when machining gears by cutting using tools, various devices have been provided for hobs and skiving cutters to suppress burrs from occurring at the ends of the workpieces. For example, Patent Documents 1 and 2 disclose hobs and skiving cutters that are provided with additional convex or concave portions to suppress burrs from occurring at the tips of the machining teeth or at the bases (tooth roots) of the machining teeth. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 53-78694 [Patent Document 2] JP 2018-187714 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, because the cutting teeth that make up the skiving cutter act continuously from the tooth tip to the tooth base, the chips generated by the cutting process become long and are difficult to discharge to the outside, which causes the chips to get caught between the skiving cutter and the chips, affecting the tooth surface characteristics and tooth profile accuracy of the workpiece, and ultimately the tool life.

[0005] Therefore, an object of the present invention is to provide a skiving cutter that performs gear machining while suppressing the generation of burrs on the workpiece, breaking up and discharging chips, and maintaining a state in which the chips are prevented from becoming caught. [Means for solving the problem]

[0006] The skiving cutter of the present invention has a plurality of teeth arranged in an annular shape around a rotation axis, and grooves are provided at the base of adjacent teeth every second groove. These grooves can also be provided at the base of adjacent teeth every third groove, or every fourth groove. Effect of the Invention

[0007] The skiving cutter of the present invention does not provide continuous grooves at the base of the processing teeth, but arranges the grooves at a predetermined interval, for example, every other tooth, every two teeth, or every three teeth, thereby cutting and discharging chips from the workpiece (work), and achieving the effect of performing gear processing while maintaining cutting performance (especially preventing chips from getting caught). In addition, the tooth grooves without grooves scrape off the workpiece tooth tips together with the burrs. Therefore, the effect of suppressing burrs is obtained while maintaining cutting performance. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a schematic partial enlarged view of the skiving cutter 10 of the present invention. [Diagram 2] FIG. 1 is a schematic partial enlarged view of a conventional skiving cutter 100. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The skiving cutter of the present invention will be described with reference to the drawings. A schematic partial enlarged view of a skiving cutter 10 according to one embodiment of the present invention is shown in Fig. 1. The skiving cutter 10 of the present invention is a tool having a rotating body shape (annular shape) formed around a rotation axis as shown in Fig. 1, and a plurality of processing teeth (cutting edges) 1 to 5 are arranged in an annular shape as shown in Fig. 1.

[0010] Grooves M1, M2 are provided at every other tooth base (tooth bottom) 11-14 formed between these processing teeth (cutting edges) 1-5. These grooves M1, M2 may be arranged at every other tooth as shown in Fig. 1, or may be arranged at every third or fourth tooth (not shown). The arrangement of these grooves can be set arbitrarily depending on the material of the workpiece (workpiece), the number of teeth, and other specifications.

[0011] In other words, instead of creating grooves on all adjacent tooth bases as with previous skiving cutters, grooves are created on the tooth bases at regular intervals, for example every other tooth, every two teeth, or every third tooth, which breaks up the cutting chips of the workpiece and improves the tooth profile accuracy, while the tooth tips of the workpiece are cut off along with the burrs using tooth grooves without grooves, thereby suppressing burrs from forming on the tooth tips of the workpiece. [Explanation of symbols]

[0012] 1~5,101~103 Machining teeth 10,100 Skiving cutter 11~14,111,112 Tooth base M1,M2 groove

Claims

1. A skiving cutter having a plurality of machining teeth arranged in an annular shape centered on a rotation axis, characterized in that grooves are provided at every other tooth base of adjacent machining teeth.

2. A skiving cutter having a plurality of machining teeth arranged in an annular shape centered on a rotation axis, characterized in that grooves are provided at every third tooth base of adjacent machining teeth.

3. A skiving cutter having a plurality of machining teeth arranged in an annular shape centered on a rotation axis, characterized in that grooves are provided at every third tooth base between adjacent machining teeth.

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