JPH09272920A - Production of gear by induction hardening - Google Patents
Production of gear by induction hardeningInfo
- Publication number
- JPH09272920A JPH09272920A JP8084257A JP8425796A JPH09272920A JP H09272920 A JPH09272920 A JP H09272920A JP 8084257 A JP8084257 A JP 8084257A JP 8425796 A JP8425796 A JP 8425796A JP H09272920 A JPH09272920 A JP H09272920A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- induction
- induction hardening
- tempering
- forging
- 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
- 230000006698 induction Effects 0.000 title claims abstract description 55
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 39
- 238000005496 tempering Methods 0.000 claims abstract description 29
- 238000005242 forging Methods 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 238000010273 cold forging Methods 0.000 claims abstract description 4
- 238000005097 cold rolling Methods 0.000 claims abstract description 4
- 238000010791 quenching Methods 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 31
- 230000000171 quenching effect Effects 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 29
- 238000001816 cooling Methods 0.000 claims description 12
- 238000005498 polishing Methods 0.000 claims description 9
- 238000007517 polishing process Methods 0.000 claims 1
- 238000011282 treatment Methods 0.000 abstract description 11
- 238000003754 machining Methods 0.000 abstract description 5
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 230000033228 biological regulation Effects 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
- 238000005255 carburizing Methods 0.000 description 16
- 238000007796 conventional method Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 229910000669 Chrome steel Inorganic materials 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 229910000915 Free machining steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高周波焼き入れ歯
車の熱処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment method for induction hardening gears.
【０００２】[0002]
【従来の技術】一般に、歯車は、鍛造によって成形した
歯車素材に歯車部を形成し、浸炭焼き入れした後に研磨
加工を行って製造される。2. Description of the Related Art Generally, a gear is manufactured by forming a gear portion on a gear material formed by forging, carburizing and quenching, and then polishing.
【０００３】この歯車の焼き入れは、製造工程の合理化
等の観点から浸炭焼き入れ法から高周波焼き入れ法が注
目されつつある。As for the hardening of the gears, the induction hardening method has been attracting attention from the carburizing hardening method from the viewpoint of streamlining the manufacturing process.
【０００４】浸炭焼き入れ法による歯車製造は、図５に
示すように、クロム鋼（ＳＣｒ４２０）等の肌焼き鋼
（合金鋼）を、例えば１２５０℃に加熱した状態で熱間
鍛造して歯車素材を成形し、自然空冷（放冷）して硬度
を下げた状態で、機械切削により歯車部を形成し、バッ
チ処理による浸炭焼き入れを行った後、研磨加工を経て
製品としての出荷に到る。Gears manufactured by the carburizing and quenching method are, as shown in FIG. 5, geared by hard forging of case-hardening steel (alloy steel) such as chrome steel (SCr420) while being heated to, for example, 1250 ° C. Molded, cooled by natural air (cooling) to reduce the hardness, the gear part is formed by mechanical cutting, carburized and quenched by batch processing, then polished and shipped as a product. .
【０００５】この浸炭焼き入れは、例えば、９２０℃に
保った浸炭雰囲気中で９０分間、加熱して浸炭させ、さ
らに炭素を拡散させるため９０分間、浸炭雰囲気を取り
除いた状態で加熱して焼き入れした後、焼き戻すために
２５０℃といった比較的低い温度で６０分加熱した後
に、放冷するという方法で行われる。これらの加熱処理
は、所定数の歯車素材をトレイに入れ、一括して浸炭炉
に入れるバッチ処理である。This carburizing and quenching is carried out, for example, by heating in a carburizing atmosphere maintained at 920 ° C. for 90 minutes for carburizing, and then for 90 minutes in order to diffuse carbon, heating and quenching with the carburizing atmosphere removed. After that, it is performed by heating at a relatively low temperature of 250 ° C. for 60 minutes for tempering and then allowing to cool. These heat treatments are batch treatments in which a predetermined number of gear materials are put in a tray and put in a carburizing furnace all at once.
【０００６】上記浸炭焼き入れは、バッチ処理であるた
め、焼き入れ作業の前に、処理される歯車素材を一定量
溜める必要があり、加工ラインの一本化ができず操業コ
ストが大きくなる。また、加熱炉の温度管理が必要で、
運転再開に備えて休止中も炉内温度を一定に保って置く
必要が有り熱効率が悪い。さらに、浸炭焼き入れは合金
鋼を使用するので材料費が高くなり、繰り返し使用され
るトレイも損耗に応じて交換する必要があり、コストが
高くなる問題があった。Since the above-mentioned carburizing and quenching is a batch process, it is necessary to store a certain amount of gear material to be treated before the quenching work, which makes it impossible to unify the machining line, resulting in a high operating cost. Also, it is necessary to control the temperature of the heating furnace,
The thermal efficiency is poor because it is necessary to keep the temperature in the furnace constant during the suspension of operation in preparation for restarting the operation. Further, since carburizing and quenching uses alloy steel, the material cost is high, and the trays that are repeatedly used also need to be replaced according to wear and there is a problem that the cost is high.
【０００７】一方、高周波焼き入れによる歯車製造は、
図６に示すような手順で行なわれる。素材として、浸炭
焼き入れで使用する合金鋼に比べて安価な中炭素鋼（Ｓ
４５〜５５Ｃ）を使用し、例えば１２５０℃に加熱した
状態で熱間鍛造によって全体の成形を行う。自然空冷
（放冷）により硬度を低下させ、機械切削加工により歯
車部を作る（歯切り加工）。さらに、高周波焼き入れの
前処理として焼き入れ焼き戻し処理を行う。これは、例
えば、８９０℃の温度下で９０分加熱して焼き入れし、
５４０℃の温度で９０分加熱した後に、放冷して焼き戻
しを行なうものである。この前熱処理後に、歯車部等の
硬度が必要な箇所を、例えば２１０ｋＨZの高周波を０.
５秒当てて高周波加熱した後に水焼き入れするという高
周波焼き入れを行い、研磨加工して製品としている。On the other hand, gear manufacturing by induction hardening is
The procedure is as shown in FIG. As a material, it is a medium-carbon steel (S
45-55C), and the whole is formed by hot forging in a state of being heated to, for example, 1250 ° C. The hardness is reduced by natural air cooling (cooling), and the gear part is made by mechanical cutting (tooth cutting). Further, quenching and tempering treatment is performed as a pretreatment for induction hardening. This is, for example, heating and quenching at a temperature of 890 ° C. for 90 minutes,
After heating at a temperature of 540 ° C. for 90 minutes, it is allowed to cool and temper. After this pre-heat treatment, the gear parts, etc., where hardness is required, for example, a high frequency of 210 kHz is applied.
The product is subjected to high-frequency induction heating by applying it for 5 seconds, followed by water-quenching, and polishing to obtain a product.
【０００８】ここで、前処理として実施される焼き入れ
焼き戻し処理は、前記説明の浸炭焼き入れにおける浸炭
雰囲気で行なう浸炭処理をなくしたもので、素材の炭素
成分を均一拡散させ、芯部硬度を調整して歯車強度を確
保し、後の高周波焼き入れを品質よく容易に行えるよう
にするため、実施されている。Here, the quenching and tempering treatment carried out as a pretreatment eliminates the carburizing treatment carried out in the carburizing atmosphere in the above-mentioned carburizing and quenching. The carbon component of the raw material is uniformly diffused, and the core hardness Is performed to secure the strength of the gear and to make it possible to easily perform the subsequent induction hardening with good quality.
【０００９】[0009]
【発明が解決しようとする課題】上記高周波焼き入れ歯
車は、浸炭焼き入れの場合に使用される合金鋼よりも安
価な中炭素鋼を利用できるので、材料コストを低下させ
ることができる。Since the induction hardening gear described above can use medium carbon steel, which is cheaper than the alloy steel used in the case of carburizing and hardening, the material cost can be reduced.
【００１０】しかし、高周波焼き入れの前処理として、
焼き入れ焼き戻し処理を行なう必要があり、専用炉が必
要であり、バッチ処理のためラインの一本化ができない
問題は解決されていない。炉の運転に伴う熱処理費用
は、高周波焼き入れに比較してかなり高額となるため、
コストの低減は困難な状況にあった。However, as a pretreatment for induction hardening,
The problem of being unable to unify the line due to batch processing has not been solved because it requires quenching and tempering, a dedicated furnace is required. Since the heat treatment cost associated with the operation of the furnace is considerably higher than that of induction hardening,
It was difficult to reduce costs.
【００１１】そこで、本発明は、素材費を上昇させるこ
となく、充分な焼き入れ硬度を確保しながら、焼き入れ
のためのバッチ処理を不要にして熱処理費用を低減でき
る高周波焼き入れ歯車の製造方法を提供することを目的
とする。Therefore, the present invention is a method for manufacturing an induction-hardened gear, which can reduce the heat treatment cost without increasing the material cost and ensuring a sufficient quenching hardness and eliminating the batch process for quenching. The purpose is to provide.
【００１２】[0012]
【課題を解決するための手段】本発明は、次に述べる３
種の高周波焼き入れ歯車の製造方法を提供する。The present invention will be described in 3 below.
Kind Code: A1 A method of manufacturing a type of induction hardened gear.
【００１３】(1) 非調質鋼を熱間鍛造して成形し、鍛造
直後の冷却時に調質を行って硬度調整した歯車素材に、
機械切削により歯車部を形成し、焼き入れ焼き戻し処理
をしないで高周波焼き入れした後、研磨加工を行うこと
を特徴とする高周波焼き入れ歯車の製造方法。(1) A gear material in which a non-heat treated steel is hot forged and formed, and the hardness is adjusted by performing heat treatment during cooling immediately after forging,
A method for producing an induction-hardened gear, comprising forming a gear portion by mechanical cutting, induction hardening without quenching and tempering treatment, and then polishing.
【００１４】(2) 非調質鋼を熱間鍛造して成形し、鍛造
直後の冷却時に調質を行って硬度調整した歯車素材に、
冷間鍛造又は冷間転造により歯車部を形成し、焼き入れ
焼き戻し処理をしないで高周波焼き入れした後、研磨加
工を行うことを特徴とする高周波焼き入れ歯車の製造方
法。(2) A gear material in which a non-heat treated steel is hot forged and formed, and the hardness is adjusted by performing heat treatment during cooling immediately after forging,
A method for producing an induction-hardened gear, comprising forming a gear portion by cold forging or cold rolling, induction hardening without quenching and tempering treatment, and then polishing.
【００１５】(3) 非調質鋼を熱間鍛造し、冷却時の調質
を行わないで成形した歯車素材に、熱間又は温間で鍛造
又は転造により歯車部を形成し、鍛造又は転造の直後の
冷却時に調質を行って硬度調整した後、焼き入れ焼き戻
し処理をしないで高周波焼き入れし、研磨加工を行うこ
とを特徴とする高周波焼き入れ歯車の製造方法。(3) A non-heat treated steel is hot forged, and a gear material is formed by hot or warm forging or rolling on a gear material formed without tempering during cooling. A method for producing an induction-hardened gear, which comprises performing tempering at the time of cooling immediately after rolling to adjust the hardness, then induction hardening without quenching and tempering, and polishing.
【００１６】(4) 上記(1) (2) (3) の高周波加熱は、高
周波焼き入れの前に、炭素の均一拡散を目的に行なう高
周波予備加熱を行い、高周波焼き入れの後に、高周波焼
き戻しを行うことができる。(4) In the induction heating of (1), (2) and (3) above, induction heating is performed for the purpose of uniformly diffusing carbon before induction hardening, and after induction hardening, induction heating is performed. You can make a return.
【００１７】[0017]
【発明の実施の形態】本発明による高周波焼き入れ歯車
の製造方法の実施態様を説明する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a method for manufacturing an induction hardened gear according to the present invention will be described.
【００１８】〔実施態様１〕図１に示す第１の方法は、
歯車部を機械切削加工により行なうが、加熱炉を用いる
処理を全てなくし、高周波加熱のみによって、焼き入れ
等の全ての加熱処理を行なうようにしたものである。[Embodiment 1] The first method shown in FIG.
Although the gear part is machined, all the heat treatment such as quenching is performed only by the high frequency heating without using the heating furnace.
【００１９】歯車材料として、非調質鋼（ＳＶｄ４５〜
５５等）を用いる。この材料を、熱間鍛造調質して歯車
素材の成形と芯部硬度調整を同時に行なう。この熱間鍛
造では、歯車部を除いた歯車の形状を成形する。調質
は、歯車の芯部硬度の調整及び組織の制御のために行な
うもので、熱間鍛造によって温度上昇している歯車素材
を、自然放冷させるのではなく、一定のパターンで温度
を下げることによって硬度調整するものである。これ
は、例えば、熱間鍛造直後に１２００℃の温度を持つ歯
車素材を、３５０℃に保たれた空間内に一定時間だけ入
れておくという方法で行われる。この調質によって、従
来方法で行なわれていた焼き入れ焼き戻し処理と同等の
効果が得られる。この調質時の温度制御は、歯車素材の
大きさによって冷え方が異なるので、各状態に応じたも
のとする。As a gear material, non-heat treated steel (SVd45-
55 etc.) is used. This material is hot forged and tempered to simultaneously form the gear material and adjust the hardness of the core. In this hot forging, the shape of the gear except the gear portion is formed. The tempering is performed to adjust the hardness of the core of the gear and to control the structure, and the temperature of the gear material whose temperature has risen due to hot forging is not naturally cooled, but the temperature is lowered in a fixed pattern. The hardness is adjusted accordingly. This is performed by, for example, immediately after hot forging, a gear material having a temperature of 1200 ° C. is put in a space kept at 350 ° C. for a certain period of time. Due to this tempering, the same effect as the quenching and tempering treatment which is performed by the conventional method can be obtained. The temperature control at the time of tempering depends on each state because the cooling method differs depending on the size of the gear material.
【００２０】この後、従来行なわれていた焼き入れ焼き
戻し処理をしないで、高周波焼き入れすることのみで、
熱処理を完了する。After that, the induction hardening is not performed, and the induction hardening is not performed.
Complete the heat treatment.
【００２１】この高周波焼き入れは、各部分に必要な硬
度を与えるように分けて行われる。最も硬度を必要とす
る歯車部は、単周波で行なう他、歯車の輪郭に沿ってプ
ロファイル焼き入れすることができる二周波焼き入れで
実施する。その他の耐磨耗性を要求される部位にも単周
波焼き入れ（二周波焼き入れも可）を実施する。この高
周波焼き入れは、高周波焼き入れの前に炭素の均一拡散
を目的とする高周波予備加熱と、高周波焼き入れ後に高
周波焼き戻しを必要に応じて実施することができる。This induction hardening is carried out separately so as to give each part a required hardness. For the gear part that requires the most hardness, in addition to single frequency, dual frequency quenching, which allows profile hardening along the contour of the gear, is performed. Single-frequency quenching (dual-frequency quenching is also possible) is performed on other parts that require abrasion resistance. In this induction hardening, induction heating for the purpose of uniform diffusion of carbon before induction hardening and induction tempering after induction hardening can be carried out if necessary.
【００２２】高周波焼き入れが終われば、歯車素材の端
面及び内径部等の精度を要する部分に、研磨加工を施し
て、製品完成品とする。After the induction hardening is finished, the end surface and the inner diameter portion of the gear material, which require precision, are subjected to polishing to obtain a finished product.
【００２３】なお、この製造方法では、機械加工による
歯車部の切削加工を容易にするため、調質鋼として、鉛
又は硫黄を含有させた、それの快削鋼（ＳＶｄ４５〜５
５Ｌ１，Ｓ１等）を用いることができる。In this manufacturing method, in order to facilitate the machining of the gear portion by machining, the free-cutting steel (SVd 45 to 5) containing lead or sulfur as the heat-treated steel.
5L1, S1 etc.) can be used.
【００２４】この実施態様の具体的処理条件を、従来の
熱処理方法と比較して、図４に示す。The specific processing conditions of this embodiment are shown in FIG. 4 in comparison with the conventional heat treatment method.
【００２５】この例は、歯車材料として非調質鋼（ＳＶ
ｄ４５Ｓ１）を用い、１２５０℃に加熱した状態で熱間
鍛造し、調質した後に、焼き入れ焼き戻し処理をしない
で、１０ＫＨZの高周波を３秒のインターバル期間を開
けて、３秒づつ５回照射するという前記高周波予備加熱
を行った後、２１０ｋＨZの高周波を０.３秒照射して加
熱しておき、水焼き入れするという方法で高周波焼き入
れするものである。In this example, non-heat treated steel (SV) is used as the gear material.
d45S1) was hot forged in a state where it was heated to 1250 ° C., and after tempering, without quenching and tempering treatment, high frequency of 10 KHz was applied for 5 times for 3 seconds at intervals of 3 seconds. After the high frequency preheating is performed, the high frequency induction heating is performed by irradiating a high frequency of 210 kHz for 0.3 seconds to heat and then water quenching.
【００２６】この場合に得られる歯車の組織は、表面部
がマルテンサイトで、芯部がフェライトとパーライト
（又はバイトナイト）の混合したものとなっている。In the structure of the gear obtained in this case, the surface portion is martensite, and the core portion is a mixture of ferrite and pearlite (or bitonite).
【００２７】この組織は、従来の浸炭焼き入れ法を採用
した場合に、芯部組織が低炭素マルテンサイトとなり、
従来の高周波焼き入れ法を採用した場合に、芯部組織が
ソルバイトとなることと明確に区別できるものとなって
いる。With this structure, when the conventional carburizing and quenching method is adopted, the core structure becomes low carbon martensite,
When the conventional induction hardening method is adopted, it can be clearly distinguished from the core structure being sorbite.
【００２８】〔実施態様２〕図２に示す第２の方法は、
炉を用いる熱処理を廃止する他、さらに歯車部の機械加
工をもなくして、さらに低コスト化を図ろうとする。[Embodiment 2] The second method shown in FIG.
In addition to abolishing heat treatment using a furnace, there will be no further machining of the gears to reduce costs.
【００２９】歯車材料としては、第１の方法と同様に、
非調質鋼（ＳＶｄ４５〜５５）を用い、この材料を、熱
間鍛造調質して歯車素材の成形と芯部硬度調整を同時に
行なう。この熱間鍛造調質では、前記第１の方法と同様
に、歯車部を除いた歯車形状の成形と、調質による硬度
調整を行なう。この後に、歯車部を冷間転造する。さら
に、前熱処理なしに高周波焼き入れのみで熱処理を完了
する。As the gear material, similar to the first method,
Using a non-heat treated steel (SVd45 to 55), this material is hot forged and tempered to simultaneously form the gear material and adjust the core hardness. In this hot forging tempering, similarly to the first method, the gear shape excluding the gear portion is molded and the hardness is adjusted by the tempering. After this, the gear part is cold-rolled. Further, the heat treatment is completed only by induction hardening without pre-heat treatment.
【００３０】この高周波焼き入れも、前記第１の方法と
同様に歯車部と、その他の耐磨耗性を要求される部位に
単周波焼き入れ又は二周波焼き入れを実施する。この方
法でも、前記高周波予備加熱及び高周波焼き戻しを必要
に応じて実施することができる。Also in this induction hardening, as in the case of the first method, single-frequency hardening or dual-frequency hardening is carried out on the gear portion and other portions where abrasion resistance is required. Also in this method, the high frequency preheating and the high frequency tempering can be carried out as necessary.
【００３１】高周波焼き入れが終われば、歯車素材の端
面及び内径部等の精度を要する部分に、研磨加工を施し
て、製品完成品とする。After the induction hardening is finished, the end portions of the gear material, the inner diameter portion and the like, which require precision, are polished to obtain a finished product.
【００３２】歯車部を転造する第２の方法は小モジュー
ル・低歯丈歯車に特に有効であるが、転造できれば大物
歯車への適用も充分に可能なものである。The second method of rolling the gear portion is particularly effective for small modules and low gear length gears, but if it can be rolled, it can be sufficiently applied to large gears.
【００３３】〔実施態様３〕図３に示す第３の方法は、
第２の方法で冷間鍛造又は転造によって行っていた歯車
部の成形を、熱間又は温間で鍛造又は転造により行い、
歯車部の形成を容易化する。[Embodiment 3] A third method shown in FIG.
Forming the gear part, which was performed by cold forging or rolling in the second method, is performed by forging or rolling hot or warm,
To facilitate the formation of the gear part.
【００３４】歯車材料としては、第１及び第２の方法と
同様に、非調質鋼（ＳＶｄ４５〜５５）を用い、この材
料を、熱間鍛造して歯車素材の成形を行なう。この時点
では、放冷させず調質をしない。As the gear material, as in the first and second methods, non-heat treated steel (SVd 45 to 55) is used, and this material is hot forged to form the gear material. At this point, it is not cooled and tempered.
【００３５】次に、熱間又は温間で鍛造又は転造によ
り、歯車部を成形する。成形後に温度の下げ方を調整す
ることによって、芯部の硬度調整を行なう。さらに、前
熱処理なしに高周波焼き入れのみで熱処理を完了する。Next, the gear portion is formed by hot or warm forging or rolling. The hardness of the core portion is adjusted by adjusting the temperature decrease after molding. Further, the heat treatment is completed only by induction hardening without pre-heat treatment.
【００３６】この高周波焼き入れも、前記第１及び第２
の方法と同様に歯車部と、その他の耐磨耗性を要求され
る部位に単周波焼き入れ又は二周波焼き入れを実施する
もので、前記高周波予備加熱及び高周波焼き戻しも必要
に応じて実施される。This induction hardening also applies to the first and second
In the same way as the method of 1., single frequency quenching or dual frequency quenching is performed on the gear part and other parts where abrasion resistance is required, and the high frequency preheating and high frequency tempering are also performed as necessary. To be done.
【００３７】高周波焼き入れが終われば、歯車素材の端
面及び内径部等の精度を要する部分に、研磨加工を施し
て、製品完成品とする。After the induction hardening is finished, the end surface of the gear material, the inner diameter portion, and the like, which require precision, are subjected to polishing to obtain a finished product.
【００３８】なお、実施態様２及び実施態様３で説明し
た本発明の第２及び第３の方法も、実施態様１で説明し
た第１の方法と同一の素材を使用し、同様の手順を踏む
高周波焼き入れを行うので、これらの方法で製造した歯
車の組織も、図４に示した第１の方法で処理した場合と
同様の組織となり、従来方法で処理した場合の組織と明
確に区別できるものとなる。The second and third methods of the present invention described in the second and third embodiments also use the same materials as in the first method described in the first embodiment and follow the same procedure. Since induction hardening is performed, the structure of the gear manufactured by these methods becomes the same structure as the case of the first method shown in FIG. 4, and can be clearly distinguished from the structure of the conventional method. Will be things.
【００３９】[0039]
【発明の効果】本発明は、従来の高周波焼き入れで必要
であった前処理としての焼き入れ焼き戻し工程を、非調
質鋼を用いることによって完全に廃止できる。したがっ
て、熱処理専用炉が不要となり、設備コスト及び熱処理
費用が大幅に削減できる。また、熱処理に炉を用いず高
周波加熱のみによって行え、バッチ処理をしなくても済
むので、加工サイクル時間も大幅に短縮でき、低コスト
な高周波焼き入れ歯車を提供することができる。According to the present invention, the quenching and tempering step as a pretreatment which is required in the conventional induction hardening can be completely abolished by using the non-heat treated steel. Therefore, the furnace for exclusive use of heat treatment becomes unnecessary, and the facility cost and the heat treatment cost can be significantly reduced. Further, the heat treatment can be performed only by high-frequency heating without using a furnace, and batch processing is not required, so that the processing cycle time can be significantly shortened and a low-cost induction-hardened gear can be provided.
【図１】 本発明の高周波焼き入れ歯車の製造方法の第
１の方法を示す図FIG. 1 is a diagram showing a first method of manufacturing an induction hardened gear according to the present invention.
【図２】 本発明の高周波焼き入れ歯車の製造方法の第
２の方法を示す図FIG. 2 is a diagram showing a second method of manufacturing the induction hardened gear of the present invention.
【図３】 本発明の高周波焼き入れ歯車の製造方法の第
３の方法を示す図FIG. 3 is a diagram showing a third method of manufacturing the induction hardened gear of the present invention.
【図４】 本発明の第１の方法の具体的処理条件と、そ
の処理によって歯車に形成される組織を、従来の方法で
処理した場合と比較して示す図FIG. 4 is a view showing a specific processing condition of the first method of the present invention and a structure formed on a gear by the processing in comparison with a case where the structure is processed by a conventional method.
【図５】 従来の浸炭焼き入れを採用した焼き入れ歯車
の製造方法を示す図FIG. 5 is a diagram showing a method of manufacturing a quenched gear that adopts conventional carburizing and quenching.
【図６】 従来の高周波焼き入れ歯車の製造方法を示す
図FIG. 6 is a view showing a conventional method for manufacturing an induction hardened gear.
Claims (5)
後の冷却時に調質を行って硬度調整した歯車素材に、機
械切削により歯車部を形成し、焼き入れ焼き戻し処理を
しないで高周波焼き入れした後、研磨加工を行うことを
特徴とする高周波焼き入れ歯車の製造方法。1. A non-tempered steel is hot-forged and formed, and the gear material is tempered by cooling immediately after forging to adjust the hardness. A method for manufacturing an induction-hardened gear, which is characterized by performing an induction hardening and then performing a polishing process.
後の冷却時に調質を行って硬度調整した歯車素材に、冷
間鍛造又は転造により歯車部を形成し、焼き入れ焼き戻
し処理をしないで高周波焼き入れした後、研磨加工を行
うことを特徴とする高周波焼き入れ歯車の製造方法。2. A non-heat treated steel is formed by hot forging, and the gear material is subjected to heat treatment during cooling immediately after forging to adjust the hardness to form a gear portion by cold forging or rolling and quenching. A method for manufacturing an induction-hardened gear, comprising performing induction hardening without tempering and then performing polishing.
行わないで成形した歯車素材に、熱間又は温間で行なう
鍛造又は転造により歯車部を形成し、鍛造又は転造直後
の冷却時に調質を行って硬度調整した後、焼き入れ焼き
戻し処理をしないで高周波焼き入れし、研磨加工を行う
ことを特徴とする高周波焼き入れ歯車の製造方法。3. A gear material formed by hot forging non-heat treated steel, without tempering during cooling, and forming a gear portion by forging or rolling carried out hot or warm, forging or A method for producing an induction-hardened gear, which comprises performing tempering during cooling immediately after rolling to adjust hardness, then induction hardening without quenching and tempering, and polishing.
を目的に行なう高周波予備加熱を行うことを特徴とする
請求項１〜３のいずれか１項に記載した高周波焼き入れ
歯車の製造方法。4. The method for producing an induction-hardened gear according to claim 1, wherein the induction-hardened gear is subjected to induction heating for the purpose of uniformly diffusing carbon before induction hardening. .
行うことを特徴とする請求項１〜４のいずれか１項に記
載した高周波焼き入れ歯車の製造方法。5. The method for producing an induction-hardened gear according to claim 1, wherein induction hardening is performed after induction hardening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8084257A JPH09272920A (en) | 1996-04-05 | 1996-04-05 | Production of gear by induction hardening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8084257A JPH09272920A (en) | 1996-04-05 | 1996-04-05 | Production of gear by induction hardening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09272920A true JPH09272920A (en) | 1997-10-21 |
Family
ID=13825408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8084257A Pending JPH09272920A (en) | 1996-04-05 | 1996-04-05 | Production of gear by induction hardening |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09272920A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000169040A (en) * | 1998-11-30 | 2000-06-20 | W Schlafhorst Ag & Co | Automatic twill winding machine and operation method of automatic twill winding machine |
-
1996
- 1996-04-05 JP JP8084257A patent/JPH09272920A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000169040A (en) * | 1998-11-30 | 2000-06-20 | W Schlafhorst Ag & Co | Automatic twill winding machine and operation method of automatic twill winding machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH05179350A (en) | Production of roller shaft for cam follower with roller | |
| JP2013221199A (en) | Method for producing bearing ring of rolling bearing | |
| US20050039830A1 (en) | Induction heat treatment method and coil and article treated thereby | |
| JPH04221014A (en) | Preparation of mechanical element made of steel | |
| JPH09310123A (en) | Manufacture of low-cost gear | |
| JPH09118925A (en) | Device and method of heat treatment for gear | |
| JPH09272920A (en) | Production of gear by induction hardening | |
| JPS63274713A (en) | Heat treatment method for bar-like parts | |
| JPS60162726A (en) | Method for surface-hardening toothed part of ring gear of flywheel | |
| KR101738503B1 (en) | Method for heat treatment for reducing deformation of cold-work articles | |
| JP2001020016A (en) | Heat treatment method of metallic member | |
| JPS60162722A (en) | Heat treatment of hot forged parts | |
| JPH11315322A (en) | Method for soften-annealing high carbon steel | |
| JPH07138647A (en) | Method for refining crystal grain size of carburizing hardened parts | |
| JPS60167724A (en) | Method of manufacturing outer cylinder of equal-speed joint | |
| JP2990821B2 (en) | Manufacturing method of steel parts | |
| JPS6227515A (en) | Method for strengthening surface | |
| SU652229A1 (en) | Rolled stock production method | |
| JPH0651888B2 (en) | High-strength gear manufacturing method | |
| JPS60251220A (en) | Production of outside cylinder for uniform joint | |
| JPS6179719A (en) | Thermo-mechanical treatment | |
| GB606996A (en) | Improvements in, or relating to, the manufacture or production of steel, or alloy steel strip | |
| SU1407636A1 (en) | Method of producing forgings of variable cross-section ,particularly, from carbon structural steels | |
| JPS59185723A (en) | Low strain surface hardening method of cold worked parts | |
| JPS5948954B2 (en) | Method for strengthening small steel parts for case hardening |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20031002 |