JPS63163069A - Heat treatment method for ring gear - Google Patents
Heat treatment method for ring gearInfo
- Publication number
- JPS63163069A JPS63163069A JP31587086A JP31587086A JPS63163069A JP S63163069 A JPS63163069 A JP S63163069A JP 31587086 A JP31587086 A JP 31587086A JP 31587086 A JP31587086 A JP 31587086A JP S63163069 A JPS63163069 A JP S63163069A
- Authority
- JP
- Japan
- Prior art keywords
- ring gear
- heat treatment
- back surface
- quenching
- surface part
- 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.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000010791 quenching Methods 0.000 claims abstract description 23
- 230000000171 quenching effect Effects 0.000 claims abstract description 23
- 238000005255 carburizing Methods 0.000 claims description 30
- 238000011282 treatment Methods 0.000 claims description 15
- 238000005256 carbonitriding Methods 0.000 claims description 9
- 229910000734 martensite Inorganic materials 0.000 abstract description 4
- 238000005496 tempering Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 2
- 125000006850 spacer group Chemical group 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000005987 sulfurization reaction Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- CPSYWNLKRDURMG-UHFFFAOYSA-L hydron;manganese(2+);phosphate Chemical compound [Mn+2].OP([O-])([O-])=O CPSYWNLKRDURMG-UHFFFAOYSA-L 0.000 description 1
- 150000002696 manganese Chemical class 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
Landscapes
- Gears, Cams (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、リングギヤの熱処理方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a ring gear heat treatment method.
（従来の技術）
ディファレンシャル組立体のりングギャは、通常は歯切
り後に浸炭焼入、浸炭窒化焼入等の熱処理を施し、次い
で歯面研磨またはラッピング処理を行い、そして最後に
リン酸マンガン塩処理、浸硫処理等の表面処理をして仕
上げることにより製造される。浸炭焼入、浸炭窒化焼入
等の熱処理は、第５図に示すように、リングギヤ１〜１
０の１０個を１組として、立棒１６に通して重ねた状態
で浸炭し、これを焼入及び焼戻しすることにより行って
いた。(Prior art) The ring gear of a differential assembly is usually subjected to heat treatment such as carburizing and quenching, carbonitriding and quenching after gear cutting, followed by tooth surface polishing or lapping treatment, and finally manganese phosphate treatment. Manufactured by finishing with surface treatment such as sulfurization. Heat treatment such as carburizing and quenching, carbonitriding and quenching is performed on ring gears 1 to 1 as shown in FIG.
This was carried out by carburizing a set of 10 pieces of 0, passing them through a vertical rod 16 in a stacked state, and then quenching and tempering the carburized pieces.
図中、１７はスペーサーを示す。In the figure, 17 indicates a spacer.
（発明が解決しようとする問題点）
しかしながら、該方法において、リングギヤを浸炭また
は浸炭窒化した後、焼入及び焼戻する際に、第６図に示
すように、背面部１１の内周が外周からαだけ浮き上が
った状態になる熱処理歪みを生じる。背面部に熱処理歪
みのあるリングギヤをラッピング等の所定の処理を施し
た後にディファレンシャル組立体に組み込むと、背面部
の熱処理歪みにより、ドライブピニオンとの歯当たりが
移動し、振動や騒音を生じるという問題が生じ為ため、
このような熱処理歪みのないリングギヤが望まれている
。熱処理歪みの調整方法として、熱処理後の歯面研磨、
ラッピング処理等がある。このような方法によって微小
な熱処理歪みは改善できるが、背面部に生じるような大
きな熱処理歪みを改善するのは不可能である。従って、
背面部の熱処理歪みは、浸炭焼入、浸炭窒化焼入を行う
前の歯切り加工時に、熱処理歪みを見込んで加工を行う
ことにより解消する必要がある。しかしながら、熱処理
歪み量は、直棒１６に重ねたリングギヤのうち、上方に
あるもの、下方にあるもの、及びスペーサー１７の直ぐ
上にあるものでは、かなり異なっており、そのため、上
記のような歯切り加工時の調整は非常に困難である。従
って、本発明は、浸炭焼入または浸炭窒化焼入によるリ
ングギヤ背面部の熱処理歪みを減少することができ、且
つ浸炭焼入または浸炭窒化焼入時のリングギヤの位置に
よる熱処理歪みのばらつきを減少することのできるリン
グギヤの熱処理方法を提供することを目的とする。(Problems to be Solved by the Invention) However, in this method, when the ring gear is quenched and tempered after being carburized or carbonitrided, as shown in FIG. A heat treatment distortion occurs in which the surface is lifted by α from the surface. When a ring gear with a heat treatment distortion on the back side is assembled into a differential assembly after being subjected to a specified treatment such as lapping, the heat treatment distortion on the back side causes the tooth contact with the drive pinion to shift, causing vibration and noise. Because of this,
A ring gear without such heat treatment distortion is desired. As a method for adjusting heat treatment distortion, tooth surface polishing after heat treatment,
There is a wrapping process, etc. Although minute heat treatment distortions can be improved by such a method, it is impossible to improve large heat treatment distortions that occur on the back surface. Therefore,
It is necessary to eliminate the heat treatment distortion of the back surface portion by taking into account the heat treatment distortion during gear cutting before carburizing and quenching and carbonitriding. However, the amount of heat treatment distortion is quite different among the ring gears stacked on the straight rod 16, those located above, those located below, and those immediately above the spacer 17, and therefore Adjustment during cutting is extremely difficult. Therefore, the present invention can reduce the heat treatment distortion of the back side of the ring gear due to carburizing and quenching or carbonitriding, and also reduce the variation in heat treatment distortion due to the position of the ring gear during carburizing and quenching or carbonitriding. The purpose of the present invention is to provide a method for heat treatment of a ring gear.
（問題点を解決するための手段）
上記の目的を達成するために、本発明のリングギヤの熱
処理方法は、リングギヤの背面部に防炭処理を施した後
、浸炭焼入または浸炭窒化焼入を行なうことを特徴とす
る。(Means for Solving the Problems) In order to achieve the above object, the ring gear heat treatment method of the present invention includes carburizing and quenching or carbonitriding and quenching after carburizing the back surface of the ring gear. It is characterized by doing.
防炭処理としては、例えば、背面部に防炭剤を塗布する
、背面部にメッキ、例えば銅またはニッケルメッキを施
す、または各リングギヤの下面、即ち背面部に平面スペ
ーサー等、防災プレートとなるものを置く方法が挙げら
れる。Anti-carburizing treatments include applying anti-carburizing agent to the back surface, plating the back surface, such as copper or nickel plating, or installing flat spacers on the bottom surface of each ring gear, that is, the back surface, to serve as a disaster prevention plate. One method is to place the .
熱処理としては、浸炭焼入、浸炭浸窒焼入等を行うのが
好ましい。As the heat treatment, it is preferable to perform carburizing and quenching, carburizing and nitriding and quenching.
本発明の方法により熱処理されたリングギヤは、ラッピ
ングまたは歯面研磨等により歯面の僅かな熱処理歪みを
是正して歯車の精度をさらに高め、そして、歯車の初期
使用時の焼付防止のためのリン酸マンガン塩処理または
浸硫処理等の表面処理を行って仕上げた後、ディファレ
ンシャル組立体に組み込まれる。The ring gear heat-treated by the method of the present invention corrects the slight heat treatment distortion of the tooth surface by lapping or polishing the tooth surface to further improve the precision of the gear, and also provides a ring gear to prevent seizure during initial use of the gear. After finishing with surface treatment such as acid manganese salt treatment or sulfurization treatment, it is assembled into the differential assembly.
（作用）
本発明の熱処理方法は、リングギヤの背面部に防炭処理
を施した状態で浸炭焼入または浸炭窒化焼入を行う。従
って、リングギヤの歯面、外周面及び内周面は浸炭また
は浸炭窒化処理されるが、背面は浸炭または浸炭窒化処
理されない。この状態で焼入及び焼戻を行うと、浸炭さ
れていない部分の方がマルテンサイト変態しやすく、先
に硬化するため、その後一定時間経過した後に他の部分
がマルテンサイト変態して、体積膨張してもその影響を
受けにくくなる。これにより、リングギヤ背面の熱処理
歪み量は減少し、また、直棒に立てたときの位置による
熱処理歪み量のばらつきも著しく減少する。(Function) The heat treatment method of the present invention performs carburizing and quenching or carbonitriding and quenching with the back surface of the ring gear subjected to carburizing treatment. Therefore, the tooth surface, outer peripheral surface, and inner peripheral surface of the ring gear are carburized or carbonitrided, but the back surface is not carburized or carbonitrided. When quenching and tempering are performed in this state, the uncarburized parts are more likely to transform into martensite and harden first, so after a certain period of time, other parts transform into martensite and expand in volume. However, it becomes less susceptible to its effects. As a result, the amount of heat treatment distortion on the back surface of the ring gear is reduced, and the variation in the amount of heat treatment distortion depending on the position when standing on a straight rod is also significantly reduced.
（実施例） 以下、実施例により本発明をさらに詳細に説明する。(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples.
実施例１：
本実施例においては、まず第１図に示すように、歯切り
したりングギャ１を背面部１１を下にして金網付治具１
５に入れる。この金網付治具１５を吊り下げて搬送する
間に、リングギヤ１の背面部１１を槽１３内の粘度の高
い防炭剤１２に浸し、その後槽１３から引き上げ、乾燥
炉１４に入れて乾燥させる。これにより、第２図に示す
ようにリングギヤ１の背面部１１に防炭剤１２が塗布さ
れる。リングギヤ２〜ＩＯについても同様の処理を行う
。乾燥したりングギャ１〜１０を第３図に示すように直
棒１６に通して重ね、浸炭焼入を行い、リングギヤ１ａ
〜１０ａを得る。Embodiment 1: In this embodiment, first, as shown in FIG.
Put it in 5. While this wire mesh jig 15 is suspended and transported, the back surface 11 of the ring gear 1 is soaked in the highly viscous carburizing agent 12 in the tank 13, and then pulled out of the tank 13 and placed in the drying oven 14 to be dried. . As a result, the carburizing agent 12 is applied to the back surface 11 of the ring gear 1, as shown in FIG. Similar processing is performed for ring gears 2 to IO. The dried ring gears 1 to 10 are passed through a straight rod 16 as shown in FIG.
~10a is obtained.
図中、１７はスペーサーを示す。背面部１１の防炭剤を
洗い流す。対照用として、防炭処理を施さずに熱処理し
たリングギヤ１′〜１０゛を製造する。防災処理後熱処
理を施したリングギヤｌａ〜１０ａと対照用リングギヤ
１゛〜１０′の熱処理歪みを測定した。防炭処理を行っ
たリングギヤｌａ〜１０ａの測定結果を第８図のグラフ
に示す。また、対照用リングギヤ１′〜ｌＯ′の測定結
果を第７図のグラフに示す。グラフより明らかなように
、背面部の防炭処理により熱処理歪み量及び熱処理歪み
のばらつきは著しく減少する。In the figure, 17 indicates a spacer. The anti-carburizing agent on the back surface 11 is washed away. As a control, heat-treated ring gears 1' to 10' were manufactured without anti-carburizing treatment. Heat treatment distortions of ring gears la to 10a, which were heat treated after disaster prevention treatment, and control ring gears 1 to 10' were measured. The graph of FIG. 8 shows the measurement results of the ring gears la to 10a that have been subjected to carburizing treatment. In addition, the measurement results for control ring gears 1' to 1O' are shown in the graph of FIG. As is clear from the graph, the amount of heat treatment distortion and the variation in heat treatment distortion are significantly reduced by the carburizing treatment on the back surface.
実施例２：
リングギヤの背面部に銅メッキまたニッケルメッキを施
すことにより防炭処理を行う。得られたリングギヤを実
施例１と同様の方法により熱処理する。得られたリン′
グギャの熱処理歪み量及び熱処理歪みのばらつきを調べ
たところ、いずれも非常に小さかった。Example 2: Anti-carburizing treatment is performed by applying copper plating or nickel plating to the back surface of the ring gear. The obtained ring gear is heat treated in the same manner as in Example 1. The obtained phosphorus′
When the amount of heat treatment strain and the variation in heat treatment strain of Gugya were investigated, both were found to be very small.
実施例３：
リングギヤ１〜７を第４図に示すようにそれぞれ平面ス
ペーサ１８・・・に載せることにより防炭処理を施し、
熱処理した。得られたリングギヤ１ｂ〜７ｂの熱処理歪
み量及びそのばらつきを調べた。Embodiment 3: Ring gears 1 to 7 are placed on planar spacers 18, respectively, as shown in FIG. 4 to perform carburizing treatment,
Heat treated. The amount of heat treatment distortion and its variation in the obtained ring gears 1b to 7b were investigated.
結果を第９図のグラフに示す。グラフより明らか４゜な
ように、本実施例により防炭処理され、熱処理されたり
ングギャ１ｂ〜７ｂの熱処理歪み及びそのばらつきは非
常に小さい。The results are shown in the graph of FIG. As is clear from the graph, the heat treatment distortions and variations thereof in the anti-carburizing and heat treated rings 1b to 7b according to this embodiment are very small.
（発明の効果）
本発明のリングギヤの熱処理方法は、リングギヤの背面
部を防炭処理して熱処理することからなる。リングギヤ
の背面は、ディファレンシャルの強度には直接関係ない
ため、浸炭が為されなくても構わない。従って、リング
ギヤの背面部を防炭することにより、ディファレンシャ
ルの強度には影響を与えずに、背面部の熱処理歪みのみ
を防止することができる。従って、歯切り後、本発明の
方法により浸炭焼入、浸炭窒化焼入等の熱処理を行い、
その後所定の処理を行なうことにより製造されたリング
ギヤは、ディファレンシャル組立体に組み込んだときに
、ドライブピニオンと良好に噛み合い、振動、騒音を生
じることもなく、静粛性、及び耐久性に冨んだディファ
レンシャル組立体を提供することができる。(Effects of the Invention) The ring gear heat treatment method of the present invention includes carrying out carburizing treatment and heat treatment on the back surface of the ring gear. The back surface of the ring gear does not need to be carburized, since it is not directly related to the strength of the differential. Therefore, by carburizing the back surface of the ring gear, only heat treatment distortion of the back surface can be prevented without affecting the strength of the differential. Therefore, after gear cutting, heat treatment such as carburizing and quenching, carbonitriding and quenching is performed by the method of the present invention,
After that, the ring gear manufactured by performing the prescribed processing meshes well with the drive pinion when assembled into the differential assembly, producing a quiet and durable differential without generating vibration or noise. assembly can be provided.
第１図は本発明の実施例１のリングギヤの熱処理方法の
防炭処理工程を示す図、第２図は該実施例により処理さ
れたリングギヤの構造を示す図、第３図は該実施例の熱
処理方法を示す断面図、第４図は本発明の実施例３のリ
ングギヤの熱処理方法を示す断面図、第５図は従来のリ
ングギヤの熱処理方法を示す断面図、第６図はりングギ
ャの熱処理歪みを示す図、第７図は従来の熱処理方法に
より得られたりングギャの熱処理歪みを示すグラフ、第
８図は本発明の実施例１の熱処理方法により得られたリ
ングギヤの熱処理歪みを示すグラフ、第９図は本発明の
実施例３の熱処理方法により得られたリングギヤの熱処
理歪みを示すグラフである。
１〜１０． １ａ 〜１０ａ、 ｌｂ 〜１０ｂ、 １
′〜１０”−リングギヤ１１・・・背面部
１２・・・防炭剤１３・・・槽 １４
・・・乾燥炉１７．１８・・・スペーサーFIG. 1 is a diagram showing the anti-carburizing process of the ring gear heat treatment method of Example 1 of the present invention, FIG. 2 is a diagram showing the structure of the ring gear treated according to the example, and FIG. 3 is a diagram showing the structure of the ring gear treated according to the example. 4 is a sectional view showing a heat treatment method for a ring gear according to Example 3 of the present invention. FIG. 5 is a sectional view showing a conventional heat treatment method for a ring gear. FIG. 6 is a sectional view showing a heat treatment distortion of a ring gear. FIG. 7 is a graph showing the heat treatment distortion of the ring gear obtained by the conventional heat treatment method. FIG. 8 is a graph showing the heat treatment distortion of the ring gear obtained by the heat treatment method of Example 1 of the present invention. FIG. 9 is a graph showing the heat treatment distortion of the ring gear obtained by the heat treatment method of Example 3 of the present invention. 1-10. 1a ~ 10a, lb ~ 10b, 1
'～10''-Ring gear 11...back part
12... Carburizing agent 13... Tank 14
...Drying oven 17.18...Spacer
Claims (1)
入または浸炭窒化焼入を行なうことを特徴とするリング
ギヤの熱処理方法。A method for heat treatment of a ring gear, which comprises performing carburizing and quenching or carbonitriding and quenching with the back surface of the ring gear subjected to carburizing treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31587086A JPS63163069A (en) | 1986-12-25 | 1986-12-25 | Heat treatment method for ring gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31587086A JPS63163069A (en) | 1986-12-25 | 1986-12-25 | Heat treatment method for ring gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63163069A true JPS63163069A (en) | 1988-07-06 |
Family
ID=18070586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31587086A Pending JPS63163069A (en) | 1986-12-25 | 1986-12-25 | Heat treatment method for ring gear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63163069A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0343582U (en) * | 1989-09-06 | 1991-04-24 | ||
| CN105316621A (en) * | 2015-11-19 | 2016-02-10 | 天津天海同步科技有限公司 | Carburization combined assembly structure for planet row transmission gears and heat treatment method |
| CN108950170A (en) * | 2018-07-12 | 2018-12-07 | 中南大学 | Car deceleration device gear carburizing quenching deformation control method and application |
| JP2019143211A (en) * | 2018-02-22 | 2019-08-29 | 日本製鉄株式会社 | Gear and manufacturing method for gear |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60165369A (en) * | 1984-02-09 | 1985-08-28 | Toyota Motor Corp | Planetary ring gear for semi-automatic transmission |
-
1986
- 1986-12-25 JP JP31587086A patent/JPS63163069A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60165369A (en) * | 1984-02-09 | 1985-08-28 | Toyota Motor Corp | Planetary ring gear for semi-automatic transmission |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0343582U (en) * | 1989-09-06 | 1991-04-24 | ||
| CN105316621A (en) * | 2015-11-19 | 2016-02-10 | 天津天海同步科技有限公司 | Carburization combined assembly structure for planet row transmission gears and heat treatment method |
| JP2019143211A (en) * | 2018-02-22 | 2019-08-29 | 日本製鉄株式会社 | Gear and manufacturing method for gear |
| CN108950170A (en) * | 2018-07-12 | 2018-12-07 | 中南大学 | Car deceleration device gear carburizing quenching deformation control method and application |
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