JP2528519B2 - Gear processing method - Google Patents
Gear processing methodInfo
- Publication number
- JP2528519B2 JP2528519B2 JP1195115A JP19511589A JP2528519B2 JP 2528519 B2 JP2528519 B2 JP 2528519B2 JP 1195115 A JP1195115 A JP 1195115A JP 19511589 A JP19511589 A JP 19511589A JP 2528519 B2 JP2528519 B2 JP 2528519B2
- Authority
- JP
- Japan
- Prior art keywords
- tooth
- gear
- cutting
- semi
- tooth profile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Gear Processing (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は円筒歯車の加工方法に関する。TECHNICAL FIELD The present invention relates to a method for machining a cylindrical gear.
従来の技術とその課題 円筒歯車の量産工程においては、搬送時や積み替え時
の衝撃により歯車同士がぶつかって打痕が発生するのを
防止するために、第３図に示すように歯車１の歯先エッ
ジ部にいわゆる45°の面取りを施すことが行われる（面
取り部を符号２で示す）。2. Description of the Related Art In the mass production process of cylindrical gears, in order to prevent the gears from hitting each other due to the impact during transportation or transshipment, dents are generated as shown in FIG. So-called 45 ° chamfering is performed on the leading edge portion (the chamfered portion is indicated by reference numeral 2).
この面取り加工は、第４図に示すように歯元部に面取
り用の歯部16を形成してなるセミトッピング歯形17を有
するホブ、すなわちセミトッピング付きホブカッタ18を
用いることにより実現され、第３図に示すように被削歯
形1aの歯切りと同時に歯車１の外周円筒面（歯先面）３
と歯面４とが交わる歯先エッジ部が刃部16により面取り
されて面取り部２が形成されることになる。５はピッチ
円である。This chamfering process is realized by using a hob having a semi-topping tooth profile 17 formed by forming a chamfering tooth portion 16 at a tooth root as shown in FIG. As shown in the figure, at the same time as cutting the tooth profile 1a, the outer peripheral cylindrical surface (tooth surface) 3 of the gear 1
And the tooth edge 4 intersects with the tooth surface 4, so that the chamfered portion 2 is formed by chamfering by the blade portion 16. 5 is a pitch circle.
一方、例えば自動車の動力伝達系に組み込まれる歯車
についてはその強度の向上を目的としてショットピーニ
ング処理が行われる。On the other hand, for example, a gear incorporated in a power transmission system of an automobile is subjected to shot peening for the purpose of improving its strength.
しかしながら、上記のセミトッピング付きホブカッタ
18による歯切り加工を終えた歯車１にショットピーニン
グを施すと、第５図に示すようにショット（鋼球）の投
射衝撃によって面取り部２と歯面４との稜線部９がばり
10となって成長し、このばり10が歯車噛み合い時におけ
る異音発生の原因となる。However, the hob cutter with the above semi-topping
When shot peening is performed on the gear 1 that has been subjected to gear cutting by 18, the ridge line portion 9 between the chamfered portion 2 and the tooth surface 4 is flashed by the shot impact of a shot (steel ball) as shown in FIG.
It grows up to 10, and this flash 10 causes abnormal noise during gear meshing.
そのため、後工程として上記のばり10の除去を目的と
した仕上加工、例えば研削仕上加工が必要となって加工
工数の増大を招いている。Therefore, as a post-process, finishing work for the purpose of removing the flash 10 described above, for example, grinding finishing work is required, resulting in an increase in the number of working steps.
本発明は以上のような問題点に鑑みてなされたもの
で、ショットピーニングに伴うばりの発生を防止した歯
車の加工方法を提供することを目的とする。The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for machining a gear that prevents the occurrence of flash due to shot peening.
課題を解決するための手段 本発明は、従来のホブカッタと異なり、歯元部に丸み
を帯びたアール面取り用の刃部を形成してなるセミトッ
ピング付きホブカッタを用いて歯切加工を行い、歯切り
と同時に被削歯形の歯先エッジ部にアール面取り加工を
施した上で、ショットピーニングを行うことを特徴とし
ている。Means for Solving the Problem The present invention, unlike a conventional hob cutter, performs a tooth cutting process using a hob cutter with a semi-topping formed by forming a rounded chamfered blade portion at the root of a tooth to perform tooth cutting, The feature is that shot peening is performed after performing round chamfering processing on the tip edge portion of the tooth profile to be cut at the same time as cutting.
作用 本発明によると、アール面取りのために被削歯形のう
ちインボリュート歯形の歯面と歯車の外周円筒面（歯先
面）とがなめらかな曲線で連続することになって従来の
ような稜線部は発生しない。その結果、たとえショット
ピーニングを施したとしてもばりが発生することはな
い。Effect According to the present invention, the tooth surface of the involute tooth profile of the tooth profile to be machined and the outer peripheral cylindrical surface (tooth surface) of the gear are continuous in a smooth curved line for the purpose of chamfering, and the ridge line portion as in the conventional case is formed. Does not occur. As a result, flash does not occur even if shot peening is performed.
実施例 第１図（Ａ）は本発明に用いられるセミトッピング付
きホブカッタ８の歯形を示し、セミトッピング歯形７の
うち左右の切刃面11,12と歯底面13とをなめらかな曲線
で結ぶべく歯元部に所定曲率の丸みをもったアール面取
り用の刃部６を形成した点で従来のものと異なってい
る。刃部６の曲率としては、第１図（Ｂ）に示すように
被削歯形14のインボリュート曲線の終端15と歯車の外周
円筒面（歯先面）３とをなめらかな曲線で結び得るよう
な大きさに設定する。Embodiment FIG. 1 (A) shows a tooth profile of a hob cutter 8 with a semi-topping used in the present invention. In order to connect the left and right cutting edge surfaces 11 and 12 and the tooth bottom surface 13 of the semi-topping tooth profile 7 with a smooth curve. This is different from the conventional one in that a rounded chamfering blade portion 6 having a roundness of a predetermined curvature is formed at the tooth base. As the curvature of the blade portion 6, as shown in FIG. 1 (B), the end 15 of the involute curve of the tooth profile 14 to be cut can be connected to the outer peripheral cylindrical surface (tooth surface) 3 of the gear with a smooth curve. Set to size.
したがって、第１図（Ａ）に示したセミトッピング歯
形７を有するセミトッピング付きホブカッタ８を用いて
歯切りを行うと、歯切りと同時に第１図（Ｂ）に示すよ
うに歯先エッジ部には刃部６によってアール面取り加工
が施されてアール面取り部19が形成される。Therefore, when the hobbing cutter 8 with the semi-topping having the semi-topping tooth profile 7 shown in FIG. 1 (A) is used for gear cutting, at the same time as the gear cutting, as shown in FIG. A round chamfering process is performed by the blade portion 6 to form a round chamfered portion 19.
こののち、歯切りされた歯車１にショットピーニング
を施したとしても歯面４には従来のような稜線部９（第
３図参照）が存在しないためにばりは全く発生しない。After that, even if the gear 1 which has been gear-cut is subjected to shot peening, burrs do not occur at all because the tooth surface 4 does not have the ridge line portion 9 (see FIG. 3) as in the prior art.
ここで、上記のアール面取り部19の曲率半径Ｒが小さ
すぎると従来と同様にショットピーニング時にばりの発
生を招いてギヤノイズ（異音）が大きくなる一方、曲率
半径Ｒが大きすぎると歯車の噛み合い率の低下によって
やはりギヤノイズが大きくなるので、ギヤノイズが最も
小さくなるような値を選んで曲率半径Ｒを設定するのが
望ましい。Here, if the radius of curvature R of the rounded chamfered portion 19 is too small, burrs are generated during shot peening to cause gear noise (abnormal noise) as in the conventional case, while if the radius of curvature R is too large, meshing of gears occurs. Since the gear noise increases as the ratio decreases, it is desirable to set the radius of curvature R by selecting a value that minimizes the gear noise.
本発明者がモジュールｍ＝2.5の歯車について実験を
行った結果では、ギヤノイズレベルと曲率半径Ｒとは第
２図のような関係となった。第２図からも明らかなよう
にギヤノイズの許容限界レベルをどこに設定するかにも
よるが、モジュールｍ＝2.5の歯車に関するかぎりアー
ル面取り部19の曲率半径Ｒを、 0.35≧R/m≧0.2 （ただし、ｍはモジュール） の範囲内に設定するのが望ましい。As a result of an experiment conducted by the present inventor on a gear having a module m = 2.5, the gear noise level and the radius of curvature R have the relationship shown in FIG. As is clear from FIG. 2, the radius of curvature R of the rounded chamfered portion 19 is 0.35 ≧ R / m ≧ 0.2 (as far as the module m = 2.5 is concerned, though it depends on where the gear noise allowable limit level is set. However, it is desirable to set m within the range of module).
発明の効果 以上のように本発明によれば、歯元部に丸みを帯びた
アール面取り用の刃部を形成してなるセミトッピング付
きホブカッタにより歯切加工を行って、被削歯形の歯切
りと同時に歯先エッジ部にアール面取り加工を施したの
ち、歯切りされた歯車にショットピーニングを施すよう
にしたことにより、従来の45°の面取りのように被削歯
形の歯面に稜線部が生じないので、たとえ歯切り後にシ
ョットピーニングを施したとしても歯面にばりが発生す
ることは全くない。その結果、従来のようなばりの除去
のみを目的とした余分な仕上加工が不要となり、加工工
数の削減が図れる。EFFECTS OF THE INVENTION As described above, according to the present invention, tooth cutting is performed by a hob cutter with a semi-topping formed by forming a rounded chamfered blade portion at a tooth root portion, and a tooth cutting of a tooth profile to be cut is performed. At the same time, after chamfering the tip of the tooth, and then performing shot peening on the gear that has been cut, the ridge line portion is formed on the tooth surface of the tooth to be cut like the conventional 45 ° chamfer. Since it does not occur, even if shot peening is performed after gear cutting, burrs do not occur on the tooth surface at all. As a result, it is not necessary to perform an extra finishing process only for removing burrs as in the conventional case, and the number of working steps can be reduced.
第１図（Ａ）は本発明に用いられるホブカッタのセミト
ッピング歯形を示す説明図、第１図（Ｂ）は同図（Ａ）
の歯形によって歯切りされた被削歯形の説明図、第２図
はアール面取り部の曲率半径のギヤノイズとの関係を示
す説明図、第３図は従来のセミトッピング歯形によって
歯切りされた被削歯形の説明図、第４図は同じく従来の
セミトッピング歯形の説明図、第５図は従来の被削歯形
のばりの発生状況を示す説明図である。 １……歯車、３……歯先面、４……歯面、６……アール
面取り用の刃部、７……セミトッピング歯形、８……ホ
ブカッタ、13……歯底面、14……被削歯形、19……アー
ル面取り部。FIG. 1 (A) is an explanatory view showing a semi-topped tooth profile of a hob cutter used in the present invention, and FIG. 1 (B) is the same figure (A).
Of the tooth profile cut by the tooth profile of Fig. 2, Fig. 2 is an explanatory diagram showing the relationship between the radius of curvature of the rounded chamfer and gear noise, and Fig. 3 is the tooth profile cut by the conventional semi-topped tooth profile. FIG. 4 is an explanatory diagram of a tooth profile, FIG. 4 is an explanatory diagram of a conventional semi-topping tooth profile, and FIG. 1 ... Gear, 3 ... Tooth surface, 4 ... Tooth surface, 6 ... Blade for chamfering, 7 ... Semi-topping tooth profile, 8 ... Hob cutter, 13 ... Tooth bottom surface, 14 ... Covered Tooth shape, 19 ... R chamfer.
Claims (1)
部を形成してなるセミトッピング付きホブカッタにより
歯切加工を行って、被削歯形の歯切りと同時に歯先エッ
ジ部にアール面取り加工を施したのち、 歯切りされた歯車にショットピーニングを施すことを特
徴とする歯車の加工方法。1. A hob cutter with a semi-topping formed by forming a rounded chamfered blade portion at the root of the tooth to perform tooth cutting, and at the same time as cutting the tooth profile to be cut, the tooth edge is rounded. After chamfering, shot peening is performed on the toothed gear, which is a method of gear processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1195115A JP2528519B2 (en) | 1989-07-27 | 1989-07-27 | Gear processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1195115A JP2528519B2 (en) | 1989-07-27 | 1989-07-27 | Gear processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0360920A JPH0360920A (en) | 1991-03-15 |
| JP2528519B2 true JP2528519B2 (en) | 1996-08-28 |
Family
ID=16335744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1195115A Expired - Fee Related JP2528519B2 (en) | 1989-07-27 | 1989-07-27 | Gear processing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2528519B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW330214B (en) * | 1996-03-22 | 1998-04-21 | Kawasaki Steel Co | Austenitic stainless stee with excellent corrosion resistance and glossiness |
| JP5776924B2 (en) | 2010-08-31 | 2015-09-09 | アイシン精機株式会社 | Gear processing device, cutter, and wave gear device |
| CN103889628A (en) * | 2011-09-15 | 2014-06-25 | 格里森工场 | Method for chamfering bevel gears |
| CN106180911B (en) * | 2016-08-22 | 2018-01-26 | 荆州恒隆汽车技术(检测)中心 | A kind of design method of serration gear hobbing cutter |
| CN108015631A (en) * | 2017-11-30 | 2018-05-11 | 无锡透平叶片有限公司 | A kind of method for preventing from producing burr after blade shot-peening |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5616006A (en) * | 1979-07-16 | 1981-02-16 | Nippon Engeruharudo Kk | Oxidizing device for carbon monoxide contained in briquette combustion gas |
| JPS62200071A (en) * | 1986-02-27 | 1987-09-03 | Toyota Motor Corp | Manufacture of high-strength gear |
-
1989
- 1989-07-27 JP JP1195115A patent/JP2528519B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0360920A (en) | 1991-03-15 |
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