JPH0343329B2 - - Google Patents
Info
- Publication number
- JPH0343329B2 JPH0343329B2 JP58222181A JP22218183A JPH0343329B2 JP H0343329 B2 JPH0343329 B2 JP H0343329B2 JP 58222181 A JP58222181 A JP 58222181A JP 22218183 A JP22218183 A JP 22218183A JP H0343329 B2 JPH0343329 B2 JP H0343329B2
- Authority
- JP
- Japan
- Prior art keywords
- heating coil
- induction heating
- quenching
- cooler
- cooling fluid
- 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 - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 claims description 71
- 230000006698 induction Effects 0.000 claims description 66
- 239000012809 cooling fluid Substances 0.000 claims description 22
- 238000010791 quenching Methods 0.000 claims description 19
- 230000000171 quenching effect Effects 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- 238000013459 approach Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Description
【発明の詳細な説明】 本発明は周回面焼入れ方法に関する。[Detailed description of the invention] The present invention relates to a circumferential surface hardening method.
環状部材と誘導加熱コイルとを相対的に回動さ
せ、当該環状部材の内外周回面や環状端面を移動
焼入れする場合、あるいは部材の平端面をループ
を画いて相対移動焼入れする場合等の周回応面焼
入れでは、焼入れ軌跡が閉成されるのが理想的で
ある。しかし周回面を移動焼入れする場合には、
部材と誘導加熱コイルとの相対移動な過程におい
て先行する誘導加熱コイルで順次加熱された部材
表面を当該誘導加熱コイルに追随する冷却器から
噴射される冷却流体で急冷するので、第１図に示
す如く先行する誘導加熱コイルＣが周回して実線
の位置、即ち前方端が焼入れ開始位置Ｓまで回帰
する直前に、既焼入れ面H1が誘導加熱されて焼
鈍されるのを避けるため、当該誘導加熱コイルＣ
への通電を停止とし、通電停止前に加熱が進んだ
部材Ｗの表面は点描する如くそのまま相対移動を
継続する誘導加熱コイルＣに追随する冷却器Ｊに
よつて冷却し焼入れ面H2を形成せしめている。
従つて焼入れ開始端側の焼入れ面H1と焼入れ終
了端側の焼入れ面H2とを接続せしめることは不
可能で、所定範囲……通常、誘導加熱コイルの全
長とほぼ同一長さ部分程度……が非焼入れ面、所
謂ソフトゾーンとして残留するのはやむを得ない
とされている。 Circulation processing, such as when an annular member and an induction heating coil are relatively rotated to move and harden the inner and outer circumferential surfaces or annular end face of the annular member, or when to move and harden the flat end face of the member in a loop. In surface hardening, ideally the hardening trajectory is closed. However, when moving and hardening the circumferential surface,
In the process of relative movement between the member and the induction heating coil, the surface of the member that has been sequentially heated by the preceding induction heating coil is rapidly cooled by the cooling fluid injected from the cooler following the induction heating coil, as shown in Figure 1. Immediately before the preceding induction heating coil C rotates around and returns to the solid line position, that is, the front end returns to the quenching start position S, in order to avoid induction heating and annealing of the already quenched surface H1 , the induction heating is performed. Coil C
The energization is stopped, and the surface of the member W, which has been heated before the energization is stopped, is cooled by the cooler J that follows the induction heating coil C, which continues to move relative to the workpiece W, as if stippled, to form a hardened surface H2 . It's forcing me.
Therefore, it is impossible to connect the hardened surface H1 at the end of hardening and the hardened surface H2 at the end of hardening within a predetermined range...usually, approximately the same length as the entire length of the induction heating coil... It is said that it is unavoidable that ... remains as a non-hardened surface, a so-called soft zone.
しかし乍ら、ソフトゾーンの存在は部材面を硬
化させて耐摩耗性・耐衝撃性その他の機械的性質
の向上を図る焼入れ目的に副わず好ましくないの
で、当該ソフトゾーンを如何に短縮するか従来腐
心するところであつた。 However, the existence of a soft zone is undesirable as it is not compatible with the purpose of quenching, which is to harden the part surface and improve wear resistance, impact resistance, and other mechanical properties, so how can the soft zone be shortened? This used to be a pain in the ass.
これがため、例えば特公昭58−28333号に見ら
れるソフトゾーン短縮方法が本出願人によつて開
発されている。当該方法は第２図ａおよひｂに示
す如く、加熱電力の大なる電源E1に接続する進
行方向に長大な大型誘導加熱コイルC′と、当該誘
導加熱コイルC′に近接して追随する、冷却流体を
後方へ噴射可能であるとともに加熱電力の小なる
電源E2に接続され誘導加熱可能である、進行方
向に短小な冷却器兼小型誘導加熱コイルJCとを
用いる。焼入れ開始位置Ｓから周回して第２図ａ
に示されるように誘導加熱コイルC′の先方端が上
記焼入れ開始位置Ｓに近接するまでの間は、当該
誘導加熱コイルC′への電源E1による通電と冷却
器兼誘導加熱コイルJCへの冷却流体の供給とに
よつて部材Ｗの表面に焼入れを施し、第２図ａに
示される時点以後は誘導加熱コイルC′への通電を
停止するとともに所定時素をおいて冷却器兼誘導
加熱コイルJCへの電源E2による通電を開始しか
つ相対移動速度を所定の低速に落して加熱および
冷却を当該冷却器兼誘導加熱コイルJCに委ねる。
それ故、第２図ｂに示される如く短小な冷却器兼
誘導加熱コイルJCの先方端が焼入れ開始位置Ｓ
に近接するまで焼入れが継続され、当該時点で通
電を停止とすることとなるので、焼入れ終了端側
の焼入れ面H2は冷却器兼誘導加熱コイルJCの短
小な長さとほぼ同じ程度の間隔をへだてて焼入れ
開始端側の焼入れ面H1まで接近し、ソフトゾー
ンは効果的に短縮される。 For this reason, the applicant has developed a soft zone shortening method as disclosed in, for example, Japanese Patent Publication No. 58-28333. As shown in Figures 2a and b, this method involves a large induction heating coil C' that is long in the direction of travel and connected to a power source E1 with a large heating power, and a coil that follows closely the induction heating coil C'. A small cooler and small induction heating coil JC is used, which is short in the direction of travel and is capable of injecting cooling fluid backward and is connected to a power source E2 with low heating power to perform induction heating. Turn around from the quenching start position S to Fig. 2a
As shown in , until the front end of the induction heating coil C' approaches the hardening start position S, the induction heating coil C' is energized by the power source E 1 and the cooler/induction heating coil JC is turned on. The surface of the member W is hardened by supplying cooling fluid, and after the point shown in FIG. The coil JC is started to be energized by the power source E2 , and the relative movement speed is reduced to a predetermined low speed, and heating and cooling are entrusted to the cooler/induction heating coil JC.
Therefore, as shown in Fig. 2b, the front end of the short cooler/induction heating coil JC is at the quenching start position S.
The quenching will continue until it approaches , and at that point the electricity will be stopped, so the quenching surface H 2 on the end side of the quenching end should have an interval that is almost the same as the length of the cooler/induction heating coil JC. It separates and approaches the hardened surface H1 on the hardening start end side, and the soft zone is effectively shortened.
上記方法は効果的であるが、大電力電源E1と
小電力電源E2とが必要であり、大型誘導加熱コ
イルC′と冷却器兼小型誘導加熱コイルJCとが必
要であり、さらには電源切替えのタイミング・相
対移動速度の２速度設定とそのタイミング等のシ
ーケンスの複雑さがあり、設備の軽減とシーケン
スの簡易化が希求されるところであつた。 Although the above method is effective, it requires a large power source E 1 and a small power source E 2 , a large induction heating coil C′ and a small induction heating coil JC that also functions as a cooler, and also requires a large power source E 1 and a small power source E 2. The sequence of switching timing, two-speed setting of relative movement speed, and the timing is complicated, and there is a desire to reduce the equipment and simplify the sequence.
本発明は上述の要請に応える目的でなされたも
のであつて、ソフトゾーンを効果的に短縮可能
で、しかも設備が極めて簡単で、シーケンスも単
純な周回面焼入れ方法を提供するものである。 The present invention has been made in response to the above-mentioned requirements, and provides a method for hardening a circumferential surface, which can effectively shorten the soft zone, has extremely simple equipment, and has a simple sequence.
本発明の要旨は
(1) 環状部材等と誘導加熱コイルとを相対的に回
動させて環状部材等の所定周回面を移動焼入れ
する場合において、
(2) 上記誘導加熱コイルで焼入れ温度以上の温度
に加熱された部材表面を当該誘導加熱コイルに
追随する冷却器から噴射される冷却流体で順次
急冷焼入れするとともに、
(3) 誘導加熱コイルが部材を周回してその先方端
が焼入れ開始位置まで回帰した時点で誘導加熱
コイルへの通電を停止し、
(4) 同時に所定冷却機構から噴射される冷却流体
を誘導加熱コイルと部材との間隙へ進行方向も
しくは斜め進行方向から噴入することにより、
(5) 誘導加熱コイルに追随して移動を継続する上
記冷却器が到達前の部材加熱面を急冷するよう
にした
ことを特徴とする周回面焼入れ方法にある。 The gist of the present invention is (1) when moving and hardening a predetermined circumferential surface of an annular member, etc. by relatively rotating the annular member, etc. and an induction heating coil, (2) when the induction heating coil is heated to a temperature higher than the quenching temperature. The surface of the heated member is sequentially rapidly cooled and quenched with cooling fluid injected from a cooler that follows the induction heating coil, and (3) the induction heating coil goes around the member until its front end reaches the quenching start position. (4) At the same time, by injecting cooling fluid from a predetermined cooling mechanism into the gap between the induction heating coil and the member from the advancing direction or diagonal advancing direction, (5) A circumferential surface hardening method characterized in that the cooler continues to move following the induction heating coil and quickly cools the heated surface of the member before reaching the cooler.
本発明の技術思想の根拠を第３図ａおよびｂに
従つて以下に説明する。 The basis of the technical idea of the present invention will be explained below with reference to FIGS. 3a and 3b.
第３図ａは周回面焼入れにソフトゾーンの残留
が不可避であることを説明した際の第１図と同一
位置まで誘導加熱コイルＣが回帰した時点での当
該誘導加熱コイルＣと部材表面温度との相関関係
を示す。誘導加熱コイルＣへの通電が停止となる
時点では、部材表面の温度特性曲線Ａは誘導加熱
コイルＣの全長の1/2に近い後方対向面が焼入れ
可能温度Ar3を超えている。しかし、誘導加熱コ
イルＣへの通電停止以後は、部材内の熱伝導の外
部へ熱放散によつて表面温度は急激に低下し、誘
導加熱コイルＣに追随する冷却器Ｊが通電停止時
の当該誘導加熱コイルＣの後方端対向部材面に冷
却流体を噴射する時点までには、部材表面の温度
特性曲線は第３図ｂにA′で示す如く低下してい
て、焼入れ可能温度Ar3以上を保持してはおら
ず、これがため長大なソフトゾーンの残留となつ
たのであるが、本発明者は第３図ａに示される誘
導加熱コイルＣへの通電停止時点における上記部
材表面の温度特性曲線Ａに着目し、これを本発明
に利用するものである。 Figure 3a shows the induction heating coil C and the surface temperature of the member at the time when the induction heating coil C returns to the same position as in Figure 1 when explaining that a soft zone is unavoidable during circumferential surface hardening. shows the correlation between At the time when the current supply to the induction heating coil C is stopped, in the temperature characteristic curve A of the member surface, the rear facing surface of the induction heating coil C, which is close to 1/2 of the total length, exceeds the hardenable temperature Ar3 . However, after the power supply to the induction heating coil C is stopped, the surface temperature rapidly decreases due to heat dissipation to the outside of the heat conduction inside the member, and the cooler J that follows the induction heating coil C is By the time the cooling fluid is injected onto the surface of the member facing the rear end of the induction heating coil C, the temperature characteristic curve of the member surface has decreased as shown by A' in Fig. 3b, and has reached a hardenable temperature Ar 3 or higher. This caused a long soft zone to remain, but the inventor of the present invention has determined that the temperature characteristic curve A of the surface of the above-mentioned member at the time when the current supply to the induction heating coil C is stopped is shown in FIG. 3a. We focused on this and utilized it in the present invention.
本発明を第４図に示す実施例に従つて詳述す
る。 The present invention will be explained in detail according to the embodiment shown in FIG.
第４図においてＣおよびＪは通常使用されてい
る誘導加熱コイルとこれに追随する冷却器であ
る。本発明では上記構成に例えば焼入れ巾とほぼ
等しい巾を有するスリツト・ノズル型の冷却機構
SJが付加される。当該冷却機構SJは、例えば上
記誘導加熱コイルＣに先行する位置に設けられ、
ノズルｎのスリツトが誘導加熱コイルＣと部材Ｗ
との間の間隙に向う如く設定され、例えば電磁弁
Ｂを介して冷却流体供給源Ｐに接続されている。 In FIG. 4, C and J are a commonly used induction heating coil and a cooler that follows it. In the present invention, for example, a slit nozzle type cooling mechanism having a width approximately equal to the quenching width is added to the above configuration.
SJ is added. The cooling mechanism SJ is provided, for example, at a position preceding the induction heating coil C,
The slit of nozzle n connects induction heating coil C and member W.
The cooling fluid supply source P is connected to the cooling fluid supply source P via a solenoid valve B, for example.
上記機構によつて周回面焼入れを行う場合、焼
入れ開始に先立ち、冷却機構SJを閉としておく。
焼入れはＳ位置から開始され、誘導加熱コイルＣ
と部材Ｗとの相対移動に従つて当該誘導加熱コイ
ルＣで加熱された部材表面は追随する冷却器Ｊか
ら噴射される冷却流体によつて急冷される。誘導
加熱コイルＣが部材Ｗとの相対移動によつて周回
し、当該誘導加熱コイルＣの先方端がほぼ焼入れ
開始位置Ｓに達した時点で当該誘導加熱コイルＣ
への通電を停止し、同時に電磁バルブＢを開成す
る。これにより冷却機構SJへ冷却流体供給源Ｐ
から冷却流体が供給され、当該冷却機構SJのノ
ズルｎからは冷却流体が誘導加熱コイルＣと部材
Ｗとの間の間隙へ向つて噴出する。当該噴出され
た冷却流体は上記間隙に矢印で示される如く噴入
し誘導加熱コイル対向部材表面を流れ、当該部材
表面を急冷する。部材表面は第４図に温度特性曲
線Ａが示す如く、誘導加熱コイルＣの全長のほぼ
半分にあたる後方対向面が焼入可能温度Ar3以上
に昇温しているので、上記噴入する冷却流体によ
つて斜線Ｈで示される部分が急冷され、かつ継続
して相対移動する誘導加熱コイルＣに追随する冷
却器Ｊから噴射される冷却流体でさらに充分な冷
却が施されて焼入れされる。冷却器Ｊが焼入れ開
始位置Ｓを通過した時点で当該冷却器Ｊおよび冷
却機構SJへの冷却流体の供給を停止、かつ相対
移動を停止して周回面焼入れが終了する。かくし
て誘導加熱コイルＣへの通電停止時点で当該誘導
加熱コイルＣが対向する部材表面のほぼ1/2に当
る後方部分が即時に焼入れされるので、ソフトゾ
ーンは従来の誘導加熱コイルＣの全長相当長さの
ほぼ1/2に短縮される。 When hardening the circumferential surface using the above mechanism, the cooling mechanism SJ is closed prior to the start of hardening.
Hardening starts from the S position, and the induction heating coil C
As the member W moves relative to the member W, the surface of the member heated by the induction heating coil C is rapidly cooled by the cooling fluid injected from the following cooler J. The induction heating coil C rotates by relative movement with the member W, and when the front end of the induction heating coil C almost reaches the quenching start position S, the induction heating coil C
At the same time, the electromagnetic valve B is opened. This allows the cooling fluid supply source P to the cooling mechanism SJ.
A cooling fluid is supplied from the nozzle n of the cooling mechanism SJ, and the cooling fluid is ejected toward the gap between the induction heating coil C and the member W. The jetted cooling fluid is injected into the gap as shown by the arrow, flows over the surface of the member facing the induction heating coil, and rapidly cools the surface of the member. As shown by the temperature characteristic curve A in Fig. 4, the rear facing surface of the member surface, which is approximately half of the total length of the induction heating coil C, has been heated to the hardenable temperature Ar 3 or higher, so that the injected cooling fluid The area indicated by the diagonal line H is rapidly cooled, and further sufficiently cooled and hardened by the cooling fluid injected from the cooler J following the induction heating coil C which continues to move relative to the induction heating coil C. When the cooler J passes the hardening start position S, the supply of cooling fluid to the cooler J and the cooling mechanism SJ is stopped, and the relative movement is stopped, thereby completing the hardening of the circumferential surface. In this way, when the current supply to the induction heating coil C is stopped, the rear portion corresponding to approximately 1/2 of the surface of the member facing the induction heating coil C is immediately hardened, so that the soft zone is equivalent to the entire length of the conventional induction heating coil C. It is shortened to almost 1/2 of the length.
上記実施例では、冷却機構SJを相対移動する
誘導加熱コイルＣに先行する位置に設けた実施例
を挙げて説明したが、これに限るものではなく、
例えばスリツトノズル型冷却機構SJを相対移動
する誘導加熱コイルの軌跡外の焼入れ開始位置Ｓ
のやゝ斜め前方もしくは当該位置Ｓに沿つて設
け、スリツト・ノズルｎを前記実施例と同様に誘
導加熱コイルＣと部材Ｗとの間の間隙方向へ向う
如く設定して当該間隙へ冷却流体を相対移動の逆
もしくは斜め逆方向から噴入せしめるようにして
も同一効果を得る。 In the above embodiment, the cooling mechanism SJ is provided at a position preceding the relatively moving induction heating coil C, but the invention is not limited to this.
For example, the quenching start position S outside the locus of the induction heating coil that moves the slit nozzle type cooling mechanism SJ relative to the
The slit nozzle n is set diagonally forward or along the position S, and the slit nozzle n is set to face the gap between the induction heating coil C and the member W to supply the cooling fluid to the gap. The same effect can be obtained by injecting from the opposite direction of the relative movement or diagonally opposite direction.
また、若し誘導加熱コイルＣと部材Ｗとの間の
間隙が僅少であつて冷却機構SJから噴射される
冷却流体が上記間隙へ噴入不充分であり、焼入れ
可能温度以上に加熱されている部材表面の急冷に
不足するようであるならば、当該誘導加熱コイル
Ｃを通電停止と同時に公知手段を用いて上方変位
させ、これによつて充分間隙が大となつた誘導加
熱コイルＣ・部材Ｗ間を介して部材の昇温表面へ
冷却流体を噴射するようにしてもよい。 In addition, if the gap between the induction heating coil C and the member W is small and the cooling fluid injected from the cooling mechanism SJ is insufficiently injected into the gap, the temperature is heated above the quenching temperature. If the surface of the member seems to be insufficiently cooled, the induction heating coil C and member W are moved upward using known means at the same time as the current is stopped, thereby making the gap sufficiently large. Cooling fluid may be injected onto the heated surface of the member through the steps.
本発明のもたらす作用ならびに効果は以下のと
おりである。 The functions and effects brought about by the present invention are as follows.
(1)イ 冷却機構SJの噴射する冷却流体によつて
焼入れ終端縁部分に多少焼入れ層の深さの浅
さはあるものの、焼入れ温度Ar3以上の温度
まで加熱された部材表面は確実に焼入れさ
れ、
ロ また従来方法では洩れ磁束と熱伝導で既焼
入れ部分の温度が上昇し焼鈍されるのを虞
れ、焼入れ開始位置Ｓのやや手前で誘導加熱
コイルへの通電を停止としたが、本発明では
部材加熱面は通電停止と同時に急冷されるの
で、高温に加熱された部分からの熱伝導の影
響が殆んどなく、それ故誘導加熱コイルの先
方端がほぼ焼入れ開始位置に達した時点で当
該誘導加熱コイルへの通電停止を行うことが
可能となり、
ハ 上記イ、ロの点からソフトゾーンは大巾に
短縮され、
(2) しかも設備は冷却機構SJの付加のみであり、
シーケンスも極めて簡易であるので、設備費が
軽少ですむにも拘らず、顕著な効果が得られ
る。(1)B Although the depth of the hardening layer is somewhat shallow at the end edge of hardening due to the cooling fluid injected by the cooling mechanism SJ, the surface of the part heated to a temperature of Ar 3 or higher is definitely hardened. In addition, in the conventional method, the current to the induction heating coil was stopped slightly before the quenching start position S due to the fear that the temperature of the already quenched part would rise due to leakage magnetic flux and heat conduction and cause the part to be annealed. In the invention, since the heating surface of the member is rapidly cooled at the same time as the power supply is stopped, there is almost no effect of heat conduction from the heated part, and therefore the point at which the leading end of the induction heating coil almost reaches the quenching start position. (2) In view of points (a) and (b) above, the soft zone is greatly shortened, and (2) the only equipment required is the addition of a cooling mechanism SJ.
Since the sequence is extremely simple, remarkable effects can be obtained even though the equipment cost is low.
こととなり、本発明の実施による効果は多大であ
る。Therefore, the effects of implementing the present invention are significant.
第１図は周回面焼入れでソフトゾーンの残留を
説明するための正面図、第２図ａおよびｂはそれ
ぞれ従来ソフトゾーン短縮方法を説明するための
正面図、第３図ａおよびｂはそれぞれソフトゾー
ン残留理由を解析した正面図、第４図は本発明方
法を示す正面図である。
Ｗ……環状部材等、Ｃ……誘導加熱コイル、Ｊ
……冷却器、SJ……冷却機構。
Fig. 1 is a front view to explain the residual soft zone during circumferential surface hardening, Fig. 2 a and b are front views to explain the conventional method of shortening the soft zone, and Fig. 3 a and b are respectively the soft zones. FIG. 4 is a front view showing the analysis of the reason for the zone remaining. FIG. 4 is a front view showing the method of the present invention. W...Annular member, etc., C...Induction heating coil, J
...Cooler, SJ...Cooling mechanism.
Claims (1)
動させて環状部材等の所定周回面を移動焼入れす
る場合において、上記誘導加熱コイルで焼入れ温
度以上の温度に加熱された部材表面を当誘導加熱
コイルに追随する冷却器から噴射される冷却流体
で順次急冷焼入れするとともに、誘導加熱コイル
が部材を周回してその先方端が焼入れ開始位置ま
で回帰した時点で誘導加熱コイルへの通電を停止
し、同時に所定冷却機構から噴射される冷却流体
を誘導加熱コイルと部材との間隙へ進行方向もし
くは斜め進行方向から噴入することにより、誘導
加熱コイルに追随して移動を継続する上記冷却器
が到達前の部材加熱面を急冷するようにしたこと
を特徴とする周回面焼入れ方法。1. When moving and quenching a predetermined circumferential surface of the annular member, etc. by relatively rotating the annular member, etc. and the induction heating coil, the induction heating coil heats the surface of the member heated to a temperature equal to or higher than the quenching temperature by the induction heating coil. The material is sequentially rapidly cooled and quenched using a cooling fluid injected from a cooler that follows the heating coil, and when the induction heating coil goes around the member and its front end returns to the quenching start position, the power supply to the induction heating coil is stopped. At the same time, by injecting cooling fluid from a predetermined cooling mechanism into the gap between the induction heating coil and the member from the advancing direction or diagonal advancing direction, the above-mentioned cooler that continues to move following the induction heating coil reaches the A circumferential surface quenching method characterized by rapidly cooling the previously heated surface of the member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58222181A JPS60116724A (en) | 1983-11-28 | 1983-11-28 | Hardening method of circumferential surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58222181A JPS60116724A (en) | 1983-11-28 | 1983-11-28 | Hardening method of circumferential surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60116724A JPS60116724A (en) | 1985-06-24 |
| JPH0343329B2 true JPH0343329B2 (en) | 1991-07-02 |
Family
ID=16778425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58222181A Granted JPS60116724A (en) | 1983-11-28 | 1983-11-28 | Hardening method of circumferential surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60116724A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005006701B3 (en) * | 2005-02-15 | 2006-03-30 | Rothe Erde Gmbh | Production of bearing ring for large rolling bearing comprises arranging inductors over common zone of annular track to be hardened, heating the opposite-lying edge layer to the hardening temperature and further processing |
| ITTO20070263A1 (en) * | 2007-04-13 | 2008-10-14 | Saet Spa | DEVICE AND METHOD TO CARRY OUT A TEMPERATURE TREATMENT WITH INDUCTION LOCALIZED ON MECHANICAL COMPONENTS, IN PARTICULAR RALLE FOR ROLLING BEARINGS OF LARGE SIZE |
| ITMI20090293A1 (en) * | 2009-02-27 | 2010-08-28 | Sipa Nuove Tecnologie Srl | THERMAL TREATMENT AND PLANT FOR THE EXECUTION OF THE SAME. |
| CN104762448B (en) | 2009-07-30 | 2017-09-01 | 高周波热练株式会社 | Induction hardening equipment, induction hardening method, load coil, annealing device and heat treatment method |
| DE102010002531A1 (en) * | 2010-03-03 | 2011-09-08 | Eldec Schwenk Induction Gmbh | hardening device |
| DE102012101309A1 (en) | 2012-02-17 | 2013-08-22 | Thyssenkrupp Rothe Erde Gmbh | Method for inductive surface hardening of an annular surface |
-
1983
- 1983-11-28 JP JP58222181A patent/JPS60116724A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60116724A (en) | 1985-06-24 |
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