JPH09310123A - Manufacture of low-cost gear - Google Patents
Manufacture of low-cost gearInfo
- Publication number
- JPH09310123A JPH09310123A JP8121810A JP12181096A JPH09310123A JP H09310123 A JPH09310123 A JP H09310123A JP 8121810 A JP8121810 A JP 8121810A JP 12181096 A JP12181096 A JP 12181096A JP H09310123 A JPH09310123 A JP H09310123A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- induction hardening
- cast iron
- cost
- quenching
- 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
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、高周波焼き入れに
よって熱処理を行なう低コスト歯車に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low cost gear which is heat treated by induction hardening.
【０００２】[0002]
【従来の技術】一般に、歯車は、鍛造によって成形した
歯車素材に切削加工によって歯車部等を形成し、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 or the like on a gear material formed by forging by cutting, quenching, and then polishing.
【０００３】上記熱処理方法として、浸炭焼き入れと高
周波焼き入れが知られている。Carburizing and induction hardening are known as the heat treatment methods.
【０００４】浸炭焼き入れによる歯車製造は、図４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。Gear manufacturing by carburizing and quenching is performed as shown in FIG. 4, in which case-hardening steel (alloy steel) such as chrome steel (SCr420) is hot forged in a state of being heated to, for example, 1250 ° C. After molding, natural air cooling (cooling) to reduce the hardness, the gear part is formed by mechanical cutting, carburized and quenched by batch processing, and then polished and shipped as a product.
【０００５】この浸炭焼き入れは、例えば、９００℃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１４０℃の温度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 900 ° C. for 90 minutes for carburizing, and for 90 minutes to diffuse carbon, at a temperature of 140 ° C. with the carburizing atmosphere removed. After heating and quenching, heating is performed at a relatively low temperature such as 250 ° C. for 60 minutes for tempering, and then allowed 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】この浸炭焼き入れは、素材に合金鋼を使用
するので材料費が高くなり、バッチ処理であるため、処
理に長時間を要し、運転コストも高くなる問題がある。[0006] This carburizing and quenching has a problem that since alloy steel is used as a raw material, the material cost is high, and since it is a batch process, it takes a long time for the process and the operating cost is also high.
【０００７】上記バッチ処理の問題を、さらに具体的に
述べると、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こと、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こと、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ること等であ
る。More specifically, the problem of the above batch processing will be described. It is necessary to store a certain amount of gear material to be processed before the quenching work, and it is impossible to unify the processing line, resulting in a large operating cost. In addition, it is necessary to control the temperature of the heating furnace, and it is necessary to keep the temperature inside the furnace constant during the rest to prepare for restarting the operation. The thermal efficiency is poor, and the trays that are used repeatedly need to be replaced according to wear. There is such a thing.
【０００８】これに対して、高周波焼き入れは、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
炭素鋼を使用でき、熱処理時間を短くできる点で注目さ
れている。On the other hand, induction hardening has been attracting attention because it can use medium carbon steel, which is less expensive than alloy steel used for carburizing and quenching, as a raw material and can shorten the heat treatment time.
【０００９】高周波焼き入れによる歯車製造は、図５に
示すような手順で行なわれる。Gear manufacturing by induction hardening is performed in the procedure as shown in FIG.
【００１０】素材として中炭素鋼（Ｓ４５〜５５Ｃ）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１４０℃で焼き入れし、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。Medium carbon steel (S45 to 55C) is used as a raw material, and the whole is formed by hot forging while 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. For example, this is heated at a temperature of 890 ° C. for 90 minutes and quenched at 140 ° C.
After heating at the temperature of 90 minutes, it is left to cool and temper. After the pre-heat treatment, a portion such as a gear portion where hardness is required is subjected to induction hardening such as high-frequency heating by applying a high frequency of 210 kHz for 0.5 seconds and then water quenching, followed by polishing to obtain a product.
【００１１】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
にするため必要なものである。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 necessary to secure the strength of the gear and to make it possible to easily carry out the subsequent induction hardening with good quality.
【００１２】[0012]
【発明が解決しようとする課題】上記高周波焼き入れに
よる歯車製造は、材料コストを低下させることができる
点で、浸炭焼き入れ法に比較して優れている。The gear manufacturing by induction hardening is superior to the carburizing and hardening method in that the material cost can be reduced.
【００１３】しかし、従来の高周波焼き入れ法は、前処
理としての焼き入れ焼き戻し処理を、専用炉を用い、バ
ッチ処理によって行なう必要がある。However, in the conventional induction hardening method, it is necessary to carry out the quenching and tempering treatment as a pretreatment by a batch treatment using a dedicated furnace.
【００１４】このため、専用炉が必要でバッチ処理が必
要な問題は依然として解決されていない。この前処理
は、本処理である高周波焼き入れよりも、かなり高額な
ものであるため、コストの低減は困難な状況にあり、自
動車のＭ／Ｔ用歯車としての量産実績は殆どないのが実
情である。For this reason, the problem that a dedicated furnace is required and batch processing is required has not been solved yet. Since this pretreatment is considerably more expensive than the induction hardening which is the main treatment, it is difficult to reduce the cost, and it is the actual situation that there is almost no mass production record as a gear for M / T of automobiles. Is.
【００１５】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
る低コスト歯車の製造方法を提供することを目的とす
る。Therefore, the present invention provides a method for manufacturing a low-cost gear which can reduce the heat treatment cost by eliminating the batch process for quenching while ensuring sufficient quenching hardness without increasing the material cost. The purpose is to provide.
【００１６】[0016]
【課題を解決するための手段】本発明は、次に述べる低
コスト歯車の製造方法を提供する。The present invention provides a method for manufacturing a low cost gear described below.
【００１７】(1) 球状黒鉛鋳鉄等の鋳鉄材により歯車形
状を有する歯車の粗形材を鋳造し、歯車部等の形状を整
える機械切削加工を行った後、焼き入れ焼き戻し処理を
しないで高周波焼き入れし、研磨加工仕上げを行うこと
を特徴とする低コスト歯車の製造方法。(1) Casting a rough shaped material of a gear having a gear shape from a cast iron material such as spheroidal graphite cast iron, performing mechanical cutting to adjust the shape of the gear portion, etc., and then without quenching and tempering treatment. A method of manufacturing a low-cost gear, which comprises induction hardening and polishing and finishing.
【００１８】(2) 球状黒鉛鋳鉄等の鋳鉄材により歯車の
粗形材を鋳造し、冷間、温間又は熱間で、転造又は鍛造
により歯車部を成形した後、焼き入れ焼き戻し処理をし
ないで高周波焼き入れし、研磨加工仕上げを行うことを
特徴とする低コスト歯車の製造方法。(2) A coarse shaped material of a gear is cast from a cast iron material such as spheroidal graphite cast iron, and the gear portion is formed by rolling or forging in cold, warm or hot, followed by quenching and tempering treatment. A method of manufacturing a low-cost gear, characterized by performing induction hardening without performing the polishing, and performing polishing finishing.
【００１９】(3) 上記(1) (2) の高周波加熱は、鋳造直
後に、基地組織の調整を狙いとする熱処理を続けて行な
い、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。(3) In the high frequency heating of the above (1) and (2), immediately after casting, a heat treatment for adjusting the matrix structure is continued, and before the induction hardening, the carbon is uniformly diffused. Induction preheating can be performed, and after induction hardening, induction tempering can be performed.
【００２０】[0020]
【発明の実施の形態】本発明による低コスト歯車の製造
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 a low cost gear according to the present invention will be described.
【００２１】〔実施態様１〕図１に示す第１の方法は、
鋳造により歯車部を含む歯車の粗形状を成形することに
より、後加工が殆ど不要な形状とし、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.
By molding the rough shape of the gear including the gear part by casting, it makes the shape that requires almost no post-processing, eliminates the use of a heating furnace, and performs all heat treatment such as quenching only by high-frequency heating. It is the one.
【００２２】歯車材料として、球状黒鉛鋳鉄（ＦＣＤ３
５０〜ＦＣＤ１２００Ａ）やＣＶ黒鉛鋳鉄等の鋳鉄材を
用いる。この材料を、歯車粗形材に鋳造する。As a gear material, spheroidal graphite cast iron (FCD3
50 to FCD1200A) and cast iron materials such as CV graphite cast iron. This material is cast into a rough gear profile.
【００２３】この鋳造時に、基地組織の調整を狙いとす
る熱処理（アニーリング）を行うことができる。During this casting, a heat treatment (annealing) for the purpose of adjusting the matrix structure can be performed.
【００２４】この熱処理は、鋳鉄がオーステナイト（Ｆ
ｅ3Ｃ）と黒鉛（グラファイト）の２相で凝固を完了
し、さらに室温まで冷却する途中で共析変態により、フ
ェライトやパーライトを生じることを利用し、冷却時の
温度調整により基地組織を目的にかなったものにするも
のである。In this heat treatment, cast iron is austenite (F
e3C) and graphite (graphite) are completely solidified, and ferrite and pearlite are produced by eutectoid transformation in the course of cooling to room temperature. It is something to make.
【００２５】この後、機械加工により歯車部等を切削加
工する。これは、既に、歯車部の粗形状が鋳造による成
形されているので、粗加工を廃止した簡単な加工で済
む。次に、上記熱処理で基地組織が調整されているの
で、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 gear portion and the like are cut by machining. Since the rough shape of the gear portion has already been formed by casting, this can be a simple process without roughing. Next, since the matrix structure is adjusted by the above heat treatment, the heat treatment is completed only by induction hardening without the conventional quenching and tempering treatment.
【００２６】この高周波焼き入れは、例えば２１０ｋＨ
Z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。This induction hardening is, for example, 210 kHz.
Induction hardening is performed by applying high frequency of Z for 0.5 seconds to high frequency heating, and then water quenching, and polishing is performed to obtain a product.
【００２７】この高周波焼き入れは、歯車部の焼き入れ
だけではなく、内径面等の耐磨耗性が要求される総ての
部位に行なうことができる。高周波焼き入れ法として
は、単周波で行なう方法の他に、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法
を実施することができ、各部分に必要な硬度を与えるよ
うに各部分毎に分け、方法を変えて行うことができる。This induction hardening can be carried out not only for the hardening of the gear portion but also for all the parts such as the inner diameter surface where abrasion resistance is required. As the induction hardening method, in addition to the single-frequency hardening method, a dual-frequency hardening method that allows profile hardening along the contour of the gear can be carried out so as to give each part the necessary hardness. Each part can be divided into different parts and the method can be changed.
【００２８】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 can be carried out, if necessary, by induction heating for the purpose of uniform diffusion of carbon before induction hardening and induction hardening after induction hardening.
【００２９】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 subjected to polishing to obtain a finished product.
【００３０】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３に示す。The specific processing conditions of this embodiment are shown in FIG. 3 in comparison with the conventional heat treatment method.
【００３１】この例は、歯車材料として非調質鋼（ＦＣ
Ｄ７００）を用い、歯車粗形材に鋳造した後、基地組織
の調整を狙いとする熱処理（アニーリング）を行い、歯
切り加工を行った後、高周波焼き入れとして、８ＫＨZ
の高周波を２秒のインターバル期間を開けて、３秒づつ
８回照射するという前記高周波予備加熱を行った後、１
８０ｋＨZの高周波を０.４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 (FC
D700) is cast into a rough gear material, then heat treatment (annealing) is performed to adjust the matrix structure, gear cutting is performed, and induction hardening is performed at 8 KHz.
After performing the high-frequency preheating of irradiating the high frequency of 3 times for 3 seconds 8 times with an interval period of 2 seconds, 1
Induction hardening is performed by irradiating a high frequency of 80 kHz for 0.4 seconds to heat and then water quenching.
【００３２】この場合に得られる歯車の組織は、表面部
がマルテンサイトにグラファイトの混合したもので、芯
部がパーライトに少量のフェライトが混合したものとな
っている。In the structure of the gear obtained in this case, the surface part is a mixture of martensite with graphite, and the core part is a mixture of pearlite with a small amount of ferrite.
【００３３】この組織は、従来の浸炭焼き入れ法を採用
した場合に、表面部組織がマルテンサイトで芯部組織が
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、表面部組織がマルテンサイトで芯部
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。This structure has a martensite surface structure and a low-carbon martensite core structure when the conventional carburizing and quenching method is adopted, and when the conventional induction hardening method is adopted, the surface portion is It can be clearly distinguished from the fact that the structure is martensite and the core structure is sorbite.
【００３４】上記実施態様１は、焼き入れ焼き戻し処理
が不要となることにより、専用炉が不要で、この処理に
必要な工程時間と熱処理費が不要となる。従って、低コ
ストで工程時間の短い高周波焼き入れの長所が生かさ
れ、全工程時間と処理費用を、従来工程より大幅に短縮
でき、低コストに高周波焼き入れ歯車を提供できる。In the first embodiment, since the quenching and tempering process is unnecessary, a dedicated furnace is not necessary, and the process time and heat treatment cost required for this process are also unnecessary. Therefore, the advantages of induction hardening at low cost and short process time can be taken advantage of, and the total process time and processing cost can be greatly reduced as compared with the conventional process, and an induction hardening gear can be provided at low cost.
【００３５】さらに、鋳鉄材は、鋼材に比較して減衰能
に優れた材料であることから、静粛性に優れた歯車とな
る。また鋳鉄材として球状黒鉛鋳鉄又はＣＶ黒鉛鋳鉄を
使用した場合は、歯車表面に存在する黒鉛に自己潤滑性
能があるので、耐磨耗性に優れた歯車を提供できる。Further, since the cast iron material is a material having a superior damping ability as compared with the steel material, it becomes a gear having excellent quietness. When spheroidal graphite cast iron or CV graphite cast iron is used as the cast iron material, the graphite present on the gear surface has a self-lubricating property, so that a gear having excellent wear resistance can be provided.
【００３６】〔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、さらに歯車部の切削加
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 the heat treatment using a furnace, we will try to further reduce the cost by eliminating the cutting work of the gear part.
【００３７】歯車材料としては、第１の方法と同様に、
球状黒鉛鋳鉄（ＦＣＤ３５０〜ＦＣＤ１２００Ａ）やＣ
Ｖ黒鉛鋳鉄等の鋳鉄を用いる。この材料を、歯車粗形状
に鋳造する。As the gear material, as in the first method,
Spheroidal graphite cast iron (FCD350 to FCD1200A) and C
Cast iron such as V graphite cast iron is used. This material is cast into a coarse gear shape.
【００３８】この鋳造時に、前記第１の方法と同様に、
基地組織の調整を狙いとする熱処理を行うことができ
る。At the time of this casting, similar to the first method,
It is possible to perform heat treatment for the purpose of adjusting the base structure.
【００３９】次に、転造又は鍛造により歯車部を成形す
る。この転造又は鍛造を、鋳造後に、放冷等して冷却し
た状態で行なう場合は、冷間転造又は鍛造となり、鋳造
後の熱い状態で行なう場合は、熱間（又は温間）転造又
は鍛造となる。Next, the gear portion is formed by rolling or forging. If this rolling or forging is carried out in a cooled state by cooling after casting, it will be cold rolling or forging, and if it is carried out in a hot state after casting, hot (or warm) rolling will be carried out. Or it will be forged.
【００４０】このように歯車部を成形した後に、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 the gear portion is thus formed, the heat treatment is completed only by induction hardening without the conventional quenching and tempering treatment.
【００４１】この高周波焼き入れも、前記第１の方法と
同様に、歯車部の焼き入れだけではなく、内径面等の耐
磨耗性が要求される総ての部位に行なうことができる。
この高周波焼き入れは、前記単周波法と二周波焼き入れ
法を必要に応じ、使い分け又は組み合わせ付、各部分に
必要な硬度を与えるように行うことができる。Similar to the first method, this induction hardening can be performed not only on the gear portion, but also on all parts where abrasion resistance is required such as the inner diameter surface.
This induction hardening can be performed by properly using or combining the single-frequency method and the dual-frequency hardening method as needed to give each part a required hardness.
【００４２】高周波焼き入れが終われば、前記同様に必
要な部分に、研磨加工を施して、製品完成品とする。After the induction hardening is finished, the necessary parts are polished as described above to obtain a finished product.
【００４３】実施態様２も実施態様１と同様に、焼き入
れ焼き戻し処理が不要であるので、この処理に関する設
備費及び処理時間と費用が不要になり、低コスト化が可
能になる。また、素材が鋳鉄であるので静粛性に優れた
歯車を提供でき、さらに球状黒鉛鋳鉄又はＣＶ黒鉛鋳鉄
を利用すれば、耐磨耗性に優れた歯車となる。特に、第
２の方法では、歯車部を転造により成形するので、転造
のファイバーフローにより、従来よりも高強度な歯車を
提供できるという利点を持っている。As in the first embodiment, the second embodiment does not require the quenching and tempering process. Therefore, the facility cost, the processing time and the cost related to this process are unnecessary, and the cost can be reduced. Further, since the material is cast iron, it is possible to provide a gear having excellent quietness, and if spheroidal graphite cast iron or CV graphite cast iron is used, a gear having excellent wear resistance can be provided. Particularly, in the second method, since the gear portion is formed by rolling, there is an advantage that a gear having higher strength than the conventional one can be provided by the fiber flow of rolling.
【００４４】[0044]
【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、球状
黒鉛鋳鉄等の鋳鉄を用いることによって完全に廃止でき
る。したがって、熱処理専用炉を用いるバッチ処理が廃
止し、高周波加熱のみによって熱処理が行えるので、加
工サイクル時間の大幅な短縮と、熱処理費用の大幅な削
減が可能になり、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 cast iron such as spheroidal graphite cast iron. Therefore, batch processing using a furnace for exclusive use of heat treatment is abolished, and heat treatment can be performed only by high-frequency heating, which makes it possible to significantly reduce the processing cycle time and heat treatment cost, and to reduce the cost of induction-hardened gears. Can be provided.
【図１】 本発明の低コスト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 a low-cost gear according to the present invention.
【図２】 本発明の低コスト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 the method for manufacturing a low-cost gear according to the present invention.
【図３】 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. 3 is a diagram 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４】 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. 4 is a diagram showing a method of manufacturing a quenched gear that adopts conventional carburizing and quenching.
【図５】 従来の高周波焼き入れ歯車の製造方法を示す
図FIG. 5 is a diagram showing a method for manufacturing a conventional induction hardened gear.
Claims (6)
形材を鋳造し、歯車部等の形状を整える機械切削加工を
行った後、焼き入れ焼き戻し処理をしないで高周波焼き
入れし、研磨加工仕上げを行うことを特徴とする低コス
ト歯車の製造方法。1. A cast iron material is used to cast a rough gear material having a gear shape, and a mechanical cutting process is performed to adjust the shape of the gear portion and the like. Then, induction hardening is performed without quenching and tempering and polishing. A method for manufacturing a low-cost gear, characterized by performing work finishing.
間、温間又は熱間で、転造又は鍛造により歯車部を成形
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、研磨加工仕上げを行うことを特徴とする低コスト
歯車の製造方法。2. A rough-shaped material of a gear is cast from a cast iron material, and after cold or warm or hot forming the gear portion by rolling or forging, induction hardening without quenching and tempering treatment is performed. Then, a method for manufacturing a low-cost gear, which comprises performing polishing and finishing.
を用いることを特徴とする請求項１又は請求項２に記載
した低コスト歯車の製造方法。3. The method of manufacturing a low-cost gear according to claim 1, wherein spheroidal graphite cast iron or CV cast iron is used as the cast iron material.
る熱処理を続けて行なうことを特徴とする請求項１〜３
のいずれか１項に記載した低コスト歯車の製造方法。4. Immediately after casting, a heat treatment for the purpose of adjusting the matrix structure is continuously performed.
A method for manufacturing a low-cost gear according to any one of 1.
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項に記載した低コスト歯車の製造方法。5. The high-frequency preheating for the purpose of uniform diffusion of carbon is carried out before the high-frequency quenching which is carried out without the quenching and tempering treatment, according to any one of claims 1 to 4. A method for manufacturing the described low-cost gear.
行うことを特徴とする請求項１〜５のいずれか１項に記
載した低コスト歯車の製造方法。6. The method for manufacturing a low-cost gear according to claim 1, wherein induction hardening is performed after induction hardening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8121810A JPH09310123A (en) | 1996-05-16 | 1996-05-16 | Manufacture of low-cost gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8121810A JPH09310123A (en) | 1996-05-16 | 1996-05-16 | Manufacture of low-cost gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09310123A true JPH09310123A (en) | 1997-12-02 |
Family
ID=14820497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8121810A Pending JPH09310123A (en) | 1996-05-16 | 1996-05-16 | Manufacture of low-cost gear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09310123A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001020014A (en) * | 1999-07-07 | 2001-01-23 | Denki Kogyo Co Ltd | High frequency induction hardening method of cast iron |
| JP2002212631A (en) * | 2001-01-16 | 2002-07-31 | High Frequency Heattreat Co Ltd | Method for strengthening fatigue strength of spheroidal graphite cast iron with high frequency induction-surface hardening and spheroidal graphite cast iron excellent in fatigue strength |
| FR2947746A1 (en) * | 2009-07-10 | 2011-01-14 | Peugeot Citroen Automobiles Sa | Fabricating a mechanical component e.g. crankshaft for internal combustion engine of motor vehicles, comprises forming a rough piece, molding the rough piece by melting, solidifying the molded piece, and local forging of the molded piece |
| JP2013536378A (en) * | 2010-07-02 | 2013-09-19 | アクティエボラゲット・エスコーエッフ | Hollow gear ring and manufacturing method thereof |
| CN106541063A (en) * | 2016-11-25 | 2017-03-29 | 广西科技大学 | A kind of high-strength ductile cast iron forging method |
-
1996
- 1996-05-16 JP JP8121810A patent/JPH09310123A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001020014A (en) * | 1999-07-07 | 2001-01-23 | Denki Kogyo Co Ltd | High frequency induction hardening method of cast iron |
| JP2002212631A (en) * | 2001-01-16 | 2002-07-31 | High Frequency Heattreat Co Ltd | Method for strengthening fatigue strength of spheroidal graphite cast iron with high frequency induction-surface hardening and spheroidal graphite cast iron excellent in fatigue strength |
| FR2947746A1 (en) * | 2009-07-10 | 2011-01-14 | Peugeot Citroen Automobiles Sa | Fabricating a mechanical component e.g. crankshaft for internal combustion engine of motor vehicles, comprises forming a rough piece, molding the rough piece by melting, solidifying the molded piece, and local forging of the molded piece |
| JP2013536378A (en) * | 2010-07-02 | 2013-09-19 | アクティエボラゲット・エスコーエッフ | Hollow gear ring and manufacturing method thereof |
| CN106541063A (en) * | 2016-11-25 | 2017-03-29 | 广西科技大学 | A kind of high-strength ductile cast iron forging method |
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