JP2733841B2 - Moving quenching method for shafts - Google Patents
Moving quenching method for shaftsInfo
- Publication number
- JP2733841B2 JP2733841B2 JP63144720A JP14472088A JP2733841B2 JP 2733841 B2 JP2733841 B2 JP 2733841B2 JP 63144720 A JP63144720 A JP 63144720A JP 14472088 A JP14472088 A JP 14472088A JP 2733841 B2 JP2733841 B2 JP 2733841B2
- Authority
- JP
- Japan
- Prior art keywords
- quenching
- shafts
- heated
- heating coil
- heating
- 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 - Fee Related
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)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は軸類の全長にないし長手方向所定長さ範囲の
表面を加熱コイルと冷却ジヤケツトからなる焼入装置に
より相対移動焼入れする場合の焼入れ方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to quenching in which a surface of a whole length of a shaft or a surface within a predetermined length range in a longitudinal direction is relatively moved and quenched by a quenching device including a heating coil and a cooling jacket. About the method.
（従来の技術） この種移動焼入れでは、軸類に対して相対移動する焼
入装置の前方側に位置する加熱コイルが加熱した被加熱
部を後方側に位置する冷却ジヤケツトから噴射される冷
却液で順次急冷・焼入れする。ただし、焼入れ開始端で
は，焼入れ装置を相対移動しつつ加熱と冷却とを開始し
ても、焼入れ開始端近傍は加熱不足となつて所定焼入れ
温度までの昇温が得られず、当該部分が焼入れされない
ので、従来から以下に述べる慣用手法によりこれに対処
している。(Prior Art) In this kind of moving quenching, a cooling fluid injected from a cooling jacket located on the rear side of a heated portion heated by a heating coil located on the front side of a quenching device moving relatively to the shafts. Quenching and quenching sequentially. However, at the quenching start end, even if heating and cooling are started while the quenching device is relatively moved, heating near the quenching start end is insufficient and the temperature does not rise to the predetermined quenching temperature. Therefore, this is conventionally dealt with by the following conventional method.
即ち、第２図は縦軸に時間を，横軸に軸類上の焼入れ
開始端および終了端位置をとつた図表上に、相対移動す
る焼入装置の時間，位置関係における動作を表示した線
図であり、加熱コイルが焼入れ開始端に対向する状態で
当該部分を所定時間ｔにわたり定位置加熱し、次いで焼
入装置を焼入れ終了端方向へ順次相対移動させつつ加
熱，急冷を施し、加熱コイルが焼入れ終了端に至つた時
点で加熱は停止とするが焼入装置の相対移動は続行して
被加熱部を急冷するという手法である。In other words, FIG. 2 is a diagram in which the vertical axis represents time, and the horizontal axis represents the quenching start and end positions on the shafts. In the figure, the heating coil is heated to a fixed position for a predetermined time t in a state where the heating coil faces the quenching start end, and then heating and quenching are performed while the quenching device is sequentially moved toward the quenching end end. When the temperature reaches the quenching end, heating is stopped, but the relative movement of the quenching device is continued to rapidly cool the portion to be heated.
（従来技術に存する問題点） 上記従来手法に従つて焼入れされた軸類を焼入れ開始
端部および焼入れ終了端部それぞれの位置で軸受に嵌装
・支承する場合、焼入れ開始端部は焼入れ終了端部に比
べて焼入れ歪量が大きく、例えば直径20〜30mmの軸類で
は焼入れ開始端部が30〜40μｍ程度大径に仕上がるの
で、そのままでは軸受側との嵌合状態に差が生ずること
となるため、所定の調整手段をとることが必要とされて
いた。(Problems in the prior art) When the shafts quenched according to the above-described conventional method are fitted and supported on bearings at the positions of the quenching start end and the quenching end, respectively, the quenching start end is the quenching end end. The amount of quenching strain is larger than that of the part, for example, in the case of shafts with a diameter of 20 to 30 mm, the quenching start end is finished to a large diameter of about 30 to 40 μm, so that there is a difference in the fitting state with the bearing side as it is Therefore, it is necessary to take a predetermined adjusting means.
この場合、所定の調整手段をとる前提として、予定焼
入れ軸類と同材質，同形寸の供試体による同一焼入れ条
件での焼入れ実験を行い、当該実験により焼入れ開始端
および終了端それぞれの発生焼入れ歪量ならびにその差
値を求めた。何故ならば、焼入れ開始端および終了端そ
れぞれの発生焼入れ歪量ならびにこの差値は，例えば直
径が同一なら常に同一値が得られるが如き単純なもので
はなく、素材材質，直径，焼入層深さ，加熱温度等の諸
要因が複雑に絡みあつて変化するので、種類が異なる軸
類ごとに実験する必要がある。In this case, as a prerequisite for taking the predetermined adjusting means, a quenching experiment was performed under the same quenching conditions with a specimen having the same material and the same size as the planned quenching shafts, and the quenching strains generated at the quenching start end and the quenching end were determined by the experiment. The amounts and their differences were determined. This is because the amount of quenching strain generated at each of the quenching start end and the quenching end and the difference value are not as simple as, for example, always obtaining the same value when the diameter is the same. Since various factors such as the heating temperature change in a complicated manner, it is necessary to conduct experiments for different types of shafts.
而して、当該実験により得た焼入れ開始端，終了端そ
れぞれの発生焼入れ歪量とその差値に応じ、量産される
例えば素材軸類の直径を予め発生焼入れ歪量の差だけ焼
入れ終了端部側で大，もしくは焼入れ開始端部側で小に
加工するか、あるいは軸類素材直径は焼入れ開始端，終
了端ともに同径加工とし，軸受の孔径を上記とは逆に加
工するか、いずれかの調整手段を採ることを決定のう
え、初めて素材加工に着手することとなる。In accordance with the quenching strain generated at the quenching start end and the quenching end obtained in the experiment and the difference between the quenching strains, the diameter of the mass-produced material shaft, for example, is set in advance by the difference between the generated quenching strain and the quenching end. Either processing is large on the side or small on the quenching start end side, or the diameter of the shaft material is the same at both the quenching start and end ends, and the bore diameter of the bearing is processed in the opposite direction. After deciding to adopt the adjustment means, material processing will be started for the first time.
上記いづれの調整手段による場合でも素材加工が極め
て煩雑となり、生産性を阻害するとともに生産コストの
増大を招来していた。In either case, the material processing becomes extremely complicated, which impairs productivity and increases production cost.
（発明の目的） 本発明は、軸類の全長ないし長手方向所定長さ範囲の
表面を加熱コイルと冷却ジヤケツトからなる焼入装置に
より相対移動焼入れする場合、従来からの慣用手法に存
する上述の問題点を解消するためになされたもので、焼
入れ開始端側，終了端側ともに軸受との嵌合状態を殆ど
差のない焼入れ仕上がりを得ることが可能、従つて調整
手段を一切不要とする軸類の移動焼入れ方法を提供する
ことを目的とする。(Object of the Invention) The present invention has been made to solve the above-mentioned problems in the conventional method when the surface of the shafts in the entire length or a predetermined length range in the longitudinal direction is relatively moved and quenched by a quenching device comprising a heating coil and a cooling jacket. This is to eliminate the points, and it is possible to obtain a quenched finish with almost no difference in the fitting state with the bearing on both the quenching start end side and the end end side, and therefore, shafts that do not require any adjustment means It is an object of the present invention to provide a moving quenching method.
（発明の要旨） 本発明にかかる軸類の移動焼入れ方法は、 （１）焼入装置の加熱コイルが軸類の焼入れ開始端に対
向する状態で当該部分を所定時間にわたり定位置加熱
し、 （２）次いで焼入装置を焼入れ終了端方向へ順次相対移
動させつつ加熱，急冷を施し、 （３）加熱コイルが焼入れ終了端に対向する位置に至つ
た時点で上記相対移動を停止し、 （４）当該部分を上記焼入れ開始端で実施したとほぼ同
一時間にわたり定位置加熱のうえ、 （５）焼入装置を加熱停止とするとともに，相対移動を
再開せしめて被加熱部を急冷するようにしたことを要旨
とする。(Summary of the Invention) The method for moving and quenching shafts according to the present invention is as follows: (1) In a state where a heating coil of a quenching device is opposed to a quenching start end of shafts, the portion is fixed-position-heated for a predetermined time; 2) Then, heating and quenching are performed while the quenching device is sequentially moved in the direction of the quenching end end. (3) When the heating coil reaches a position facing the quenching end end, the relative movement is stopped. ) The part is heated at a fixed position for substantially the same time as that performed at the quenching start end. (5) The quenching device is stopped from heating and the relative movement is resumed to rapidly cool the heated part. That is the gist.
本発明法を第１図の縦軸に時間を，横軸に軸類上の焼
入れ開始端および終了端位置をとつた図表上で相対移動
する焼入装置の時間・位置関係における動作線図として
表す。The method of the present invention is shown in FIG. 1 as an operation diagram in a time-positional relationship of a quenching apparatus which relatively moves on a chart in which the vertical axis represents time and the horizontal axis represents quenching start and end positions on the shafts. Represent.
第１図と前掲第２図とを対比すれば一見して明確とさ
れるところであるが、本発明法は焼入れ開始端では従来
からの慣用手法，即ち上記（１）および（２）の構成に
従うが、焼入れ終了端で（３）〜（５）の構成をとるこ
とが本発明法の特徴である。As is apparent from a comparison between FIG. 1 and FIG. 2 described above, at first glance, the method of the present invention follows the conventional method at the beginning of quenching, that is, the structure of the above (1) and (2). However, it is a feature of the method of the present invention that the constitution of (3) to (5) is adopted at the end of quenching.
（発明の作用） 本発明は、焼入れ開始端で実施した所定時間ｔにわた
り定位置加熱を焼入れ終了端でも実施することにより、
両端での付与熱エネルギーを等しく，かつ熱伝達・拡散
条件をほぼ等しくし、両端部分での焼入れ歪量，即ち焼
入れ仕上がり直径をほぼ同一とする作用がある。(Effect of the Invention) The present invention provides that the in-position heating is performed also at the quenching end end for a predetermined time t performed at the quenching start end,
This has the effect of making the applied heat energy equal at both ends and making the heat transfer / diffusion conditions almost equal, and making the quenching strains at both ends, that is, the quenched finished diameters almost the same.
これをさらに詳述すれば、本発明者が各種形状……例
えば丸棒軸や両端部にスプラインの形成されたスプライ
ン軸等，また異なる径寸，あるいは異なる素材材質等か
らなる軸類について焼入れ深さを種々変えて実施した多
数の実験結果から、少なくとも通常の焼入れ有効深さ１
〜4mm範囲内に仕上げる場合では，焼入れ開始端の直径
に対する焼入れ終了端の直径を０〜10μｍの範囲内の小
径に仕上げることが可能であり、この程度の径差は素材
軸類の焼入れ開始端側，終了端側それぞれの直径および
両軸受側の孔径それぞれを同一径に加工しても、嵌合状
態に殆ど差がなく、支障を生じない。In more detail, the inventor of the present invention has quenched depths of various shapes such as a round bar shaft, a spline shaft having splines formed at both ends, and shafts having different diameters or different material materials. From the results of a number of experiments carried out with varying depths, at least the normal hardening effective depth
When finishing within the range of ~ 4mm, it is possible to finish the quenching end diameter to the small diameter within the range of 0 ~ 10μm with respect to the diameter of the quenching start end. Even if the diameters of the side and end ends and the hole diameters of both bearings are machined to the same diameter, there is almost no difference in the fitted state, and no trouble occurs.
尚、上記において焼入れ終了端側が開始端側よりも大
径にならない理由は、当該焼れ終了端で加熱コイルを定
位置加熱としても冷却ジヤケツトから噴射される冷却液
が既に加熱済み部分を継続冷却中で、当該部分が熱伝導
する付与熱エネルギーを奪うこととなつて、焼入れ終了
端側条件を開始端側のそれに完全一致させないからであ
る。In the above, the reason why the quenching end end does not have a larger diameter than the start end side is that the cooling fluid injected from the cooling jacket continuously cools the already heated portion even when the heating coil is fixed-position heating at the quenching end end. In this case, the portion deprives the applied heat energy of heat conduction, so that the conditions of the quenching end end side do not completely match those of the start end side.
もし、両端部分での焼入れ条件を完全に一致させよう
として、例えば焼入れ終了端の定位置加熱と同時に冷却
を一時停止する操作をすれば、当該操作は焼入れ終了端
に隣接する既加熱部分の冷却を不足させて焼抜けを生じ
させる虞がある。また、焼入れ終了端の定位置加熱開始
後に所定の時間差をもつて冷却を一時停止する操作をす
ればよいとも考えられるが、この場合には既焼入れ部が
伝導熱によつて焼なましされることとなる。If the quenching conditions at both ends are to be completely matched, for example, if the operation of temporarily stopping the cooling at the same time as the heating at the fixed position at the end of the quenching is performed, the operation is performed to cool the heated portion adjacent to the quenching end. May be insufficient to cause burn-through. It is also conceivable to perform an operation of temporarily stopping the cooling with a predetermined time difference after the start of the in-position heating at the end of the quenching, but in this case, the quenched portion is annealed by the conduction heat. It will be.
以上の理由から、本発明法は焼入れ終了端における定
位置加熱中に冷却を継続状態とするものである。For the above reasons, the method of the present invention is to continue cooling during fixed position heating at the end of quenching.
（発明の効果） 本発明は、焼入れ開始端側と終了端側との焼入れ歪量
をほぼ同一とするので、少なくとも実験による焼入れ開
始端または終了端のいずれか一方の発生焼入れ歪量を知
るだけで、素材の軸類直径および軸受孔径を焼入れ開始
端側，終了端側の別なく所定同一径に設定・加工し得る
こととなり、これにより煩雑な調整手段が不要となり、
生産性の向上と生産コストの引き下げに寄与するところ
甚大である。(Effects of the Invention) In the present invention, since the quenching distortion amount on the quenching start end side and the quenching end side is substantially the same, at least the amount of quenching distortion generated at either one of the quenching start end or the end end is known only by experiment. Thus, the diameter of the shaft and the diameter of the bearing hole of the material can be set and processed to the same predetermined diameter regardless of the quenching start end side and the end end side, thereby eliminating the need for complicated adjustment means.
The contribution to improving productivity and reducing production costs is enormous.
第１図は本発明法に従う焼入れ装置の動作線図、第２図
は従来法に従う焼入れ装置の動作線図である。FIG. 1 is an operation diagram of a quenching device according to the method of the present invention, and FIG. 2 is an operation diagram of a quenching device according to a conventional method.
Claims (1)
表面を加熱コイルと冷却ジャケットからなる焼入装置に
より相対移動焼入れする場合において、上記焼入装置の
加熱コイルが軸類の焼入れ開始端に対向する状態で当該
部分を所定時間にわたり定位置加熱し、次いで焼入装置
を焼入れ終了端方向へ順次相対移動させつつ加熱、急冷
を施し、加熱コイルが焼入れ終了端に対向する位置に至
った時点で上記相対移動を停止し、当該部分を上記焼入
れ開始端で実施したとほぼ同一時間にわたり定位置加熱
のうえ、焼入装置を加熱停止とするとともに、相対移動
を再開せしめて被加熱部を急冷するようにしたことを特
徴とする軸類の移動焼入れ方法。When the surface of a shaft within a predetermined length in the entire length or a longitudinal direction is relatively quenched by a quenching device including a heating coil and a cooling jacket, the heating coil of the quenching device starts quenching of the shaft. The part is heated at a fixed position for a predetermined time in a state facing the end, and then heated and quenched while the quenching device is sequentially moved in the direction of the quenching end end, and the heating coil reaches a position facing the quenching end end. When the relative movement is stopped, the part is heated at a fixed position for substantially the same time as that performed at the quenching start end, the quenching device is stopped, and the relative movement is resumed to thereby heat the portion to be heated. Moving quenching of shafts, characterized in that quenching is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63144720A JP2733841B2 (en) | 1988-06-14 | 1988-06-14 | Moving quenching method for shafts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63144720A JP2733841B2 (en) | 1988-06-14 | 1988-06-14 | Moving quenching method for shafts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01316422A JPH01316422A (en) | 1989-12-21 |
| JP2733841B2 true JP2733841B2 (en) | 1998-03-30 |
Family
ID=15368742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63144720A Expired - Fee Related JP2733841B2 (en) | 1988-06-14 | 1988-06-14 | Moving quenching method for shafts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2733841B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6108612B2 (en) * | 2013-05-17 | 2017-04-05 | 富士電子工業株式会社 | Moving quenching device for long workpiece and moving quenching method |
-
1988
- 1988-06-14 JP JP63144720A patent/JP2733841B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01316422A (en) | 1989-12-21 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |