JPS6253741B2 - - Google Patents
Info
- Publication number
- JPS6253741B2 JPS6253741B2 JP910782A JP910782A JPS6253741B2 JP S6253741 B2 JPS6253741 B2 JP S6253741B2 JP 910782 A JP910782 A JP 910782A JP 910782 A JP910782 A JP 910782A JP S6253741 B2 JPS6253741 B2 JP S6253741B2
- Authority
- JP
- Japan
- Prior art keywords
- gear
- tooth
- protrusion
- noise
- module
- 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
Links
- 238000005121 nitriding Methods 0.000 claims description 15
- 238000011282 treatment Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 150000004767 nitrides Chemical class 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005255 carburizing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Gears, Cams (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Description
【発明の詳細な説明】
本発明は、バツクラツシにもとずく噛合い時に
発生する騒音の発生を防止した低騒音歯車および
その製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a low-noise gear that prevents noise generated during meshing due to backlash, and a method for manufacturing the same.
一般に、インボリユート歯車等においては、歯
元部および歯先部に面当りを良好にするためにク
ラウニングを付け、その後、RXガス雰囲気中で
ガス浸炭・焼入れを行なつて表面硬化を行なつて
いる。しかしながら、前記ガス浸炭は930〜850℃
で行ない、その後、焼入れで急冷するため歯車の
変形が大きい。したがつて、歯車は前記変形代を
見込んで製作するか、硬化処理後にシエービング
加工を行なつているが、前記熱処理変形、加工精
度およびバラツキにより所定寸法の歯車が得られ
ず、噛合い時に歯元部と歯先部とに隙間が生じて
バツクラツシが大きく、騒音（振動）が大きくな
るという不都合があつた。 Generally, involute gears are crowned at the root and tip of the tooth to improve surface contact, and then gas carburized and quenched in an RX gas atmosphere to harden the surface. . However, the gas carburizing temperature is 930~850℃
The gears are then quenched and rapidly cooled, resulting in large deformation of the gears. Therefore, gears are manufactured with the above deformation allowance in mind, or are subjected to shaving processing after hardening treatment, but due to the heat treatment deformation, processing accuracy and variations, it is not possible to obtain gears of the specified dimensions, and the teeth do not form when meshing. There was a problem that a gap was created between the base and the tip of the tooth, resulting in large bumps and increased noise (vibration).
本発明は、前記従来の不都合をなくすために
種々研究の結果なされたもので、歯先から歯底方
向に0.05モジユールから0.4モジユールの範囲の
位置の歯面部に、３〜30μの高さの窒化層の突起
を形成し、この突起によりバツクラツシを実質的
に少なくして騒音を少なくした低騒音歯車および
その製造方法を提供しようとするものである。 The present invention was made as a result of various studies to eliminate the above-mentioned conventional disadvantages. It is an object of the present invention to provide a low-noise gear in which layer protrusions are formed and the protrusions substantially reduce backlash and noise, and a method for manufacturing the same.
つぎに、本発明を実施例である図面にしたがつ
て図面にしたがつて説明する。 Next, the present invention will be explained with reference to the drawings, which are embodiments.
本発明は、歯先から歯底方向に0.05モジユール
から0.4モジユールの範囲の位置の歯面部に、３
〜30μの高さの窒化層の突起を設けて実質的に隙
間をなくしてバツクラツシを除去した点に特徴を
有するが、この突起を形成するのに、歯車の窒化
処理を利用するものである。 In the present invention, three
It is characterized by the fact that protrusions of the nitrided layer with a height of ~30μ are provided to virtually eliminate gaps and eliminate bumps, and to form these protrusions, nitriding of gears is utilized.
すなわち、たとえば、ガス軟窒化処理は、鉄
鋼、窒化用鋼を、RXガス：NH3ガス＝50：50の
雰囲気中で570℃×3.2H保持し、その後、雰囲気
で徐冷することにより表面に窒化層を形成して表
面を硬化させるものであるが、このガス軟窒化処
理においては、処理温度が前記ガス浸炭に比べて
低く、かつ、処理後は徐冷するため、変形が少な
いという利点を有するとももに、表面温度が高い
部分があれば、この部分の窒化層厚さが大とな
り、突起が形成されるという性質を有する。 For example, gas soft nitriding treatment involves holding steel or steel for nitriding at 570°C for 3.2 hours in an atmosphere of RX gas: NH 3 gas = 50:50, and then gradually cooling it in the atmosphere. This process hardens the surface by forming a nitrided layer, but this gas soft-nitriding process has the advantage of less deformation because the treatment temperature is lower than that of the gas carburizing process and the process is slowly cooled. However, if there is a portion where the surface temperature is high, the thickness of the nitride layer in this portion increases and protrusions are formed.
したがつて、本発明においては、第１図に示す
実施例のように、歯車（歯部）１の歯先２から歯
底方向に0.05モジユールから0.4モジユールの範
囲の位置の歯面部３に、歯先２となす角αが30゜
〜60゜を面取りを行ない、その後、この歯車１を
窒化処理をすると、角部４は高温となり、第２図
に示すように、角部４に他の窒化層５より厚みの
ある突起６を形成することになる。この場合、歯
車１の刃先２の角部にも突起が形成されるが、面
取側はもちろん他方側も歯車の噛合いに関係しな
いようにクラウニングなどにより逃がして構成し
ている。 Therefore, in the present invention, as in the embodiment shown in FIG. 1, on the tooth surface portion 3 of the gear (tooth portion) 1 at a position ranging from 0.05 module to 0.4 module in the tooth root direction from the tooth tip 2, When the angle α formed with the tooth tip 2 is chamfered from 30° to 60°, and the gear 1 is then subjected to nitriding treatment, the corner 4 becomes high temperature, and as shown in FIG. This results in the formation of protrusions 6 that are thicker than the nitride layer 5. In this case, a protrusion is also formed at the corner of the cutting edge 2 of the gear 1, but not only the chamfered side but also the other side is provided with a relief by crowning or the like so that it does not affect the meshing of the gears.
こゝで、第３図に示すように、歯先に何の細工
もしない歯車同志（No.１）、歯先にクラウニング
を付けた歯車同志（No.２）、歯先２から0.2モジユ
ールの距離に面取りを行なつて角部４に６μの突
起６を設けた駆動歯車と、５μの突起６を設けた
被駆動側歯車（No.３）とで、噛合い時の騒音を測
定したところ、第４図に示す結果を得た。すなわ
ち、歯面に突起６を設けたものは騒音が従来のも
のに比べて低下した。 Here, as shown in Figure 3, there is a gear with no modification on the tooth tip (No. 1), a gear with crowning on the tooth tip (No. 2), and a gear with a 0.2 module from the tooth tip 2. The noise during meshing was measured between a drive gear with a 6μ protrusion 6 on the corner 4 by chamfering the distance, and a driven gear (No. 3) with a 5μ protrusion 6. , the results shown in FIG. 4 were obtained. That is, the noise of the teeth provided with the protrusions 6 on the tooth surface was lower than that of the conventional teeth.
また、前記突起６の個数による騒音低下効果を
調べるために、駆動側の歯車の駆動側に６μの突
起を設けたもの(A)、駆動、被駆動側に両歯車の駆
動側に６μ，５μの突起を設けたもの(B)、駆動側
歯車の駆動側および被駆動側に各々６μの突起
を、または被駆動側歯車の駆動側および被駆動側
に各々５μの突起を設けたもの(C)、両歯車の両側
に各々５μ，６μの突起を設けたもの(D)と、突起
のないものとで前記同様比較試験を行なつたとこ
ろ第５図に示すように、歯面部に突起６が１個で
もあれば騒音低下効果を有することが判明した。
なお、突起６は歯先２から0.2モジユールの位置
に設けた。 In addition, in order to investigate the noise reduction effect depending on the number of protrusions 6, we investigated a case in which a 6μ protrusion was provided on the drive side of the drive side gear (A), a 6μ protrusion on the drive side and a 5μ protrusion on the drive side of both gears on the driving and driven sides (A). (B), a protrusion of 6μ on each of the drive side and driven side of the drive side gear, or a protrusion of 5μ on each of the drive side and driven side of the driven side gear (C) ), a comparison test was conducted in the same manner as above with a gear with protrusions of 5μ and 6μ on both sides (D) and a gear with no protrusions, and as shown in Fig. 5, there were protrusions on the tooth surface. It has been found that if there is even one, it has a noise reduction effect.
Note that the protrusion 6 was provided at a position 0.2 module from the tooth tip 2.
つぎに、突起６の高さと騒音の関係を調べるた
めに、突起６の位置を歯先２から0.2モジユール
の点とし、面取り角α、ガス軟時間、雰囲気を変
化させてその突起６の高さを変化させたものと、
従来の歯車とで騒音の比較試験を行なつたとこ
ろ、第６図に示すように、突起６の高さは３〜30
μにおいて従来のものより騒音が低いことが判明
した。また、30μが超えると、噛合いが強するぎ
るため、前記の範囲が最も好ましい。 Next, in order to investigate the relationship between the height of the protrusion 6 and the noise, the position of the protrusion 6 is set at a point 0.2 module from the tooth tip 2, and the height of the protrusion 6 is determined by changing the chamfer angle α, gas softening time, and atmosphere. and those that changed
When we conducted a noise comparison test with a conventional gear, we found that the height of the protrusion 6 was 3 to 30 mm, as shown in Figure 6.
It was found that the noise was lower than the conventional one in μ. Moreover, if it exceeds 30μ, the meshing will be too strong, so the above range is most preferable.
さらに、突起６の位置の騒音の関係を調でるた
めに、突起６の高さ６μとし、歯先から、突起ま
での距離（モジユール）を種々変化させて、従来
の歯車と騒音の比較試験を行なつたところ、第７
図に示すように、0.05モジユールから0.4モジユ
ールの範囲の位置の突起６を設けるのが最も効果
的であることが判明した。なお、歯先２となす角
αであるが、余り小さいと突起６の位置との関係
で歯先がなくなり、また、大き過ぎると、角部が
形成されないため、前記角度αは30゜〜60゜の範
囲が好ましい。 Furthermore, in order to find out the relationship between the noise and the position of the protrusion 6, the height of the protrusion 6 was set to 6μ, and the distance (module) from the tooth tip to the protrusion was variously changed, and a noise comparison test was conducted with that of a conventional gear. After doing this, the seventh
As shown in the figure, it has been found that it is most effective to provide the protrusion 6 at a position in the range of 0.05 to 0.4 module. Note that the angle α formed with the tooth tip 2 is between 30° and 60° because if it is too small, the tooth tip will disappear due to the position of the protrusion 6, and if it is too large, no corner will be formed. A range of ° is preferred.
前記実施例において、窒化処理としてガス軟窒
化を利用したが、ガス窒化あるいはタフトライド
処理等の他の窒化処理によつて突起を形成しても
全く同様の効果を得ることができる。 In the above embodiment, gas soft nitriding was used as the nitriding treatment, but the same effect can be obtained even if the protrusions are formed by other nitriding treatments such as gas nitriding or tuftride treatment.
以下の説明で明らかなように、第１の発明によ
れば、歯面部の所定位置に所定高さの突起を設け
るという簡単な構成で噛合い時に発生する騒音を
低下させる低騒音歯車とすることができる。 As will be clear from the following description, according to the first invention, a low-noise gear is provided that reduces noise generated during meshing with a simple configuration in which a protrusion of a predetermined height is provided at a predetermined position on the tooth surface. Can be done.
また、第２の発明によれば、歯車の表面硬化処
理を熱変形の少ない窒化処理で行ない、しかも、
この窒化処理の性質を利用して突起を形成するた
め、極めて安価に、かつ正確に突起を形成するこ
とができるという効果を奏する。 Further, according to the second invention, the surface hardening treatment of the gear is performed by a nitriding treatment that causes less thermal deformation, and furthermore,
Since the protrusions are formed by utilizing the properties of this nitriding process, the protrusions can be formed extremely inexpensively and accurately.
第１図は本発明における窒化処理前の歯車の歯
部を示す拡大図、第２図は第１図は窒化処理を施
した状態図、第３図は従来の歯車と、歯面部に突
起を設けた歯車との模式図、第４図は第３図の歯
車を用いた騒音比較グラフ、第５図も第４図と同
様の騒音比較グラフ、第６図は歯面部に突起を設
けた歯車の突起高さと従来の歯車との騒音比較グ
ラフで、第７図は歯面部に設けた突起位置と従来
の歯車との騒音比較グラフである。
１……歯車（歯部）、２……歯先、３……歯面
部、４……角部、５……窒化層、６……突起。
Fig. 1 is an enlarged view showing the tooth portion of the gear before nitriding according to the present invention, Fig. 2 is a diagram showing the state after nitriding in Fig. 1, and Fig. 3 shows a conventional gear with protrusions on the tooth surface. Fig. 4 is a noise comparison graph using the gear shown in Fig. 3, Fig. 5 is a noise comparison graph similar to Fig. 4, and Fig. 6 is a gear with protrusions on the tooth surface. Fig. 7 is a noise comparison graph between the protrusion height and a conventional gear, and Fig. 7 is a noise comparison graph between the protrusion position provided on the tooth surface and a conventional gear. DESCRIPTION OF SYMBOLS 1...Gear (tooth part), 2...Tooth tip, 3...Tooth surface part, 4...Corner part, 5...Nitride layer, 6...Protrusion.
Claims (1)
モジユールの範囲の位置の歯面部に、３〜30μの
高さの窒化層の突起を形成したことを特徴とする
低騒音歯車。 ２ 歯先から歯底方向に0.05モジユールから0.4
モジユールの位置の歯面部に、歯先とのなす角が
30゜〜60゜の面取り加工を行ない、ついで前記面
取り加工された歯車に、ガス軟窒化、タフライド
処理などの窒化処理を施し、前記面取り角部に３
〜30μの窒化層の突起を形成することを特徴とす
る低騒音歯車の製造方法。[Claims] 1. 0.05 module to 0.4 in the direction from the tooth tip to the tooth bottom.
A low-noise gear characterized in that a protrusion of a nitrided layer with a height of 3 to 30 μm is formed on the tooth surface portion at a position within the range of the module. 2 0.05 module to 0.4 from the tooth tip to the tooth root direction
The angle between the tooth surface at the module position and the tooth tip is
A chamfering process of 30° to 60° is performed, and then the chamfered gear is subjected to nitriding treatment such as gas soft nitriding or tuff-riding treatment, and the chamfered corners are
A method for manufacturing a low-noise gear, characterized by forming protrusions of a nitride layer of ~30μ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP910782A JPS58126976A (en) | 1982-01-23 | 1982-01-23 | Low-noise gear and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP910782A JPS58126976A (en) | 1982-01-23 | 1982-01-23 | Low-noise gear and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58126976A JPS58126976A (en) | 1983-07-28 |
| JPS6253741B2 true JPS6253741B2 (en) | 1987-11-11 |
Family
ID=11711400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP910782A Granted JPS58126976A (en) | 1982-01-23 | 1982-01-23 | Low-noise gear and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58126976A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007333025A (en) * | 2006-06-13 | 2007-12-27 | Nsk Ltd | Manufacturing method of rolling sliding parts |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2866646A1 (en) * | 2014-10-06 | 2016-04-06 | Michel Jozef Korwin | Method for heat treating long steel pipes |
-
1982
- 1982-01-23 JP JP910782A patent/JPS58126976A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007333025A (en) * | 2006-06-13 | 2007-12-27 | Nsk Ltd | Manufacturing method of rolling sliding parts |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58126976A (en) | 1983-07-28 |
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