JP2826670B2 - Quenching and cooling method for thin plate members - Google Patents
Quenching and cooling method for thin plate membersInfo
- Publication number
- JP2826670B2 JP2826670B2 JP31927089A JP31927089A JP2826670B2 JP 2826670 B2 JP2826670 B2 JP 2826670B2 JP 31927089 A JP31927089 A JP 31927089A JP 31927089 A JP31927089 A JP 31927089A JP 2826670 B2 JP2826670 B2 JP 2826670B2
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- JP
- Japan
- Prior art keywords
- thin plate
- cooling
- plate member
- pair
- 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.)
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- Heat Treatment Of Sheet Steel (AREA)
Description
【発明の詳細な説明】 a.産業上の利用分野 本発明は、長手状の一枚の薄肉鋼板をコ字状又はＵ字
状に成形して成る薄板部材の焼入冷却方法に係り、更に
詳しくは、コ字状又はＵ字状の薄板部材の互いに対向す
る一対の対向片部を加熱した後に、前記薄板部材の両側
部分を金型の間に挾み込んで焼入冷却するようにした薄
板部材の焼入冷却方法に関するものである。The present invention relates to a method for quenching and cooling a thin plate member formed by forming a single long thin steel plate into a U-shape or a U-shape. Specifically, after heating a pair of opposing pieces of a U-shaped or U-shaped thin plate member facing each other, both sides of the thin plate member are sandwiched between molds to perform quenching cooling. The present invention relates to a method for quenching and cooling a thin plate member.
b.従来の技術 この種の薄板部材は、前輪駆動車の駆動系に配設され
るトリポード継手等の如き等速形自在継手の一部品とし
て使用されている。第６図に示すように、薄板部材30
は、通常、コ字状或いはＵ字状に屈曲成形され、その両
側部分すなわち互いに対向する一対の対向片部30a,30b
に焼入処理が施される。b. Prior art This kind of thin plate member is used as one component of a constant velocity universal joint such as a tripod joint provided in a drive system of a front wheel drive vehicle. As shown in FIG.
Is usually bent into a U-shape or U-shape, and a pair of opposing pieces 30a, 30b opposing each other, that is, opposing each other.
Is subjected to a quenching process.
ところで、薄板部材30の焼入れに際しては、まず薄板
部材30の一対の対向片部30a,30bを所要の焼入温度に加
熱した後に、第６図及び第７図に示すように一対の対向
片部30a,30b間に内金型31を挿入配置すると共に対向片
部30a,30bの外側に外金型32,33をそれぞれ配置し、薄板
部材30が塑性変形しない程度の押圧力Ｆにて対向片部30
a,30bを内金型31と外金型32,33との間にそれぞれ挾み込
んだ状態にする。そして、内金型31及び外金型32,33の
内部にそれぞれ形成された冷却液通路34,35,36に冷却液
を同時に供給し、これによって被焼入物たる薄板部材30
の焼入冷却を行なうようにしていた。By the way, at the time of quenching of the thin plate member 30, first, a pair of opposing piece portions 30a, 30b of the thin plate member 30 are heated to a required quenching temperature, and then, as shown in FIG. 6 and FIG. The inner mold 31 is inserted and arranged between 30a and 30b, and the outer molds 32 and 33 are arranged outside the opposing pieces 30a and 30b, respectively, and the opposing pieces are pressed with a pressing force F such that the thin plate member 30 does not plastically deform. Part 30
a and 30b are sandwiched between the inner mold 31 and the outer molds 32 and 33, respectively. Then, the coolant is simultaneously supplied to the coolant passages 34, 35, 36 formed inside the inner mold 31 and the outer molds 32, 33, and thereby the thin plate member 30 to be quenched is provided.
Quenching and cooling.
c.発明が解決しようとする課題 しかしながら、上述の従来方法には次の如き問題点が
あった。c. Problems to be solved by the invention However, the above-described conventional method has the following problems.
すなわち、薄板部材30（被焼入物）の対向片部30a,30
b（所要焼入箇所）のみでなく薄板部材30の全体がズブ
加熱されている場合、或いは対向片部30a,30bのみが部
分加熱されている場合の何れの場合にも、焼入冷却時に
前記対向片部30a,30bは焼入温度からマルテンサイト変
態開始温度までの領域で収縮し、マルテンサイト変態開
始温度からマルテンサイト変態終了温度までの領域で再
び膨張するが、この際の収縮速度及び膨張速度を制御す
ることは困難である。つまり、薄板部材30が塑性変形し
ない程度の押圧力で挾み付けた状態で冷却させるだけで
は、薄板部材30の各所における冷却速度を局部的に変化
させることができないため、焼入冷却時に発生する熱応
力及びマルテンサイト変態応力による薄板部材30の収縮
及び膨張に起因する変形を抑えることができないという
大きな問題点があった。従って、従来では可成り大きな
焼入歪を生じているのが実状である。That is, the facing piece portions 30a, 30a of the thin plate member 30 (hardened material)
In the case where not only the b (required quenching part) but also the entire thin plate member 30 is sub-heated, or only the facing piece portions 30a and 30b are partially heated, The opposing pieces 30a, 30b contract in the region from the quenching temperature to the martensitic transformation start temperature, and expand again in the region from the martensitic transformation start temperature to the martensitic transformation end temperature. It is difficult to control speed. In other words, cooling only in a state where the thin plate member 30 is sandwiched with a pressing force that does not cause plastic deformation cannot locally change the cooling rate at various points of the thin plate member 30. There is a significant problem that deformation caused by contraction and expansion of the thin plate member 30 due to thermal stress and martensitic transformation stress cannot be suppressed. Therefore, it is the actual state that a considerably large quenching strain is conventionally generated.
本発明は、このような実状に鑑みてなされたものであ
って、その目的は、既述の如き薄板部材の一対の対向片
部を焼入処理するに際し、焼入歪の発生を最小限に抑え
ることができるような焼入冷却方法を提供することにあ
る。The present invention has been made in view of such circumstances, and its purpose is to minimize the occurrence of quenching distortion when quenching a pair of opposed pieces of a thin plate member as described above. An object of the present invention is to provide a quenching and cooling method that can suppress the quenching.
d.課題を解決するための手段 上述の目的を達成するために、本発明では、コ字状又
はＵ字状の薄板部材の互いに対向する一対の対向片部を
加熱した後に、前記一対の対向片部を金型の間にそれぞ
れ挾み込んで焼入冷却するようにした薄板部材の焼入冷
却方法において、 （Ａ）所定の焼入温度に加熱した前記薄板部材の一対の
対向片部の間に内金型を配置すると共にその外側に外金
型をそれぞれ配置して、前記一対の対向片部の各々を前
記内金型と外金型との間に所要圧力をもってそれぞれ挾
み込むことにより、前記一対の対向片部を冷却する第１
の冷却工程と、 （Ｂ）前記内金型に設けられた冷却液通路に冷却液を供
給することにより、前記一対の対向片部を冷却する第２
の冷却工程と、 （Ｃ）前記外金型にそれぞれ設けられた冷却液通路に冷
却液を供給することにより、前記一対の対向片部を冷却
する第３の冷却工程と、 （Ｄ）前記内金型、外金型及び薄板部材に対して間隔を
置いて配設されたジャケットから冷却液を噴出すること
により、前記内金型及び外金型と前記薄板部材との非接
触部分を冷却する第４の冷却工程と、 をそれぞれ時間間隔を置いて行なうことによって、焼入
冷却すべき前記一対の対向片部の各部における冷却速度
を変化させるようにしている。d. Means for Solving the Problems In order to achieve the above object, in the present invention, after heating a pair of opposed pieces of a U-shaped or U-shaped thin plate member facing each other, the pair of opposed pieces are heated. In the method of quenching and cooling a thin plate member in which one of the thin plate members is sandwiched between molds to perform quenching and cooling, (A) a pair of opposed pieces of the thin plate member heated to a predetermined quenching temperature. An inner mold is disposed between the inner mold and the outer mold, and an outer mold is disposed outside the inner mold. Each of the pair of opposing pieces is sandwiched between the inner mold and the outer mold with a required pressure. As a result, the first cooling unit cools the pair of opposing pieces.
(B) supplying a coolant to a coolant passage provided in the inner mold to cool the pair of opposed pieces.
(C) a third cooling step of cooling the pair of opposing pieces by supplying a coolant to coolant channels provided in the outer mold, respectively; A non-contact portion between the inner mold and the outer mold and the thin plate member is cooled by jetting a cooling liquid from a jacket provided at an interval with respect to the mold, the outer mold and the thin plate member. The fourth cooling step and the fourth step are performed at time intervals to change the cooling rate in each part of the pair of opposed pieces to be quenched and cooled.
以下、本発明の一実施例に付き第１図〜第５図を参照
して説明する。Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
第１図は薄板部材１を焼入冷却するために用いられる
焼入冷却装置２を示すものである。本装置２は、第１図
に示すように、装置基台３上の所定箇所に固定配置され
た内金型４と、この内金型４に対してそれぞれ移動可能
に配設された一対の外金型5,6及び位置決め治具７と、
これらの部材5,6,7を押圧駆動する油圧シリンダ8,9,10
とをそれぞれ具備している。さらに、第３図及び第４図
に示すように、内金型4,外金型5,6及び位置決め治具７
の上部に冷却液噴射用ジャケット（冷却環）25が配設さ
れている。なお、第１図において、11,12は外金型5,6の
ガイド機構である。FIG. 1 shows a quenching cooling device 2 used for quenching and cooling a thin plate member 1. As shown in FIG. 1, the present apparatus 2 includes an inner mold 4 fixedly arranged at a predetermined position on an apparatus base 3 and a pair of inner molds 4 movably arranged with respect to the inner mold 4. Outer dies 5, 6 and positioning jig 7,
Hydraulic cylinders 8, 9, 10 that press and drive these members 5, 6, 7
Respectively. Further, as shown in FIGS. 3 and 4, the inner mold 4, the outer molds 5, 6 and the positioning jig 7 are provided.
A cooling liquid spraying jacket (cooling ring) 25 is disposed on the upper side. In FIG. 1, reference numerals 11 and 12 denote guide mechanisms for the outer dies 5 and 6.
上述の内金型４は、第２図に明示するように、直方体
形状の本体部4aの先端に先細り状の台形部4bを一体成形
して成るものであり、内金型４の側部にはその高さ方向
の中央部分に冷却液通路13が形成されている。この冷却
液通路13は、内金型４の基端面4cで開口されかつその側
面4d,4eの中央部分において長手方向のほぼ半分に沿っ
て開口された一対の溝部13a,13bと、これらの溝部13a,1
3bを互いに連通するための連通路13c,13dとで構成され
ている。As shown in FIG. 2, the inner die 4 is formed by integrally forming a tapered trapezoidal portion 4b at the tip of a rectangular parallelepiped main body 4a. A coolant passage 13 is formed at the center in the height direction. The coolant passage 13 has a pair of grooves 13a and 13b which are opened at the base end face 4c of the inner mold 4 and which are opened along substantially half of the longitudinal direction at the center of the side faces 4d and 4e. 13a, 1
The communication passages 3c and 13d for communicating the 3b with each other.
一方、上述の外金型5,6は直方体形状に成形され、そ
の片側に冷却液通路14,15がそれぞれ設けられている。
これらの冷却液通路14,15は、一側面の半分部分に形成
された溝部14a,15bと、この溝部14a,15aに連なる通路14
b,15bとで構成されている。そして、内金型４及び外金
型5,6の上面には冷却液供給用パイプ18,19,20が配設さ
れ、これらのパイプ18〜20を介して前記冷却液通路13,1
4,15に冷却液がそれぞれ供給されるようになっている。On the other hand, the outer dies 5 and 6 described above are formed in a rectangular parallelepiped shape, and the coolant passages 14 and 15 are provided on one side thereof.
These coolant passages 14 and 15 are provided with grooves 14a and 15b formed in a half portion of one side surface, and a passage 14 connected to the grooves 14a and 15a.
b, 15b. Coolant supply pipes 18, 19, and 20 are provided on the upper surfaces of the inner mold 4 and the outer molds 5, 6, and the coolant passages 13, 1 are provided through these pipes 18 to 20.
Coolant is supplied to each of 4,15.
また、上述の位置決め治具７は台形状の切欠部21を有
しており、この切欠部21の一対のテーパ面21a,21bの中
間部分に前記薄板部材１の屈曲部に線接触で当接される
ようになっている。Further, the positioning jig 7 has a trapezoidal cutout portion 21, and the middle portion between the pair of tapered surfaces 21 a and 21 b of the cutout portion 21 abuts on the bent portion of the thin plate member 1 by line contact. It is supposed to be.
また、上述の冷却環25は、第３図及び第４図に示す如
く、内金型４及び外金型5,6の上部に所定間隔を置いて
固定されており、冷却環25の底壁には多数の冷却液噴射
孔26が等間隔を置いて形成されており、その上壁には冷
却液供給管27が接続されている。The cooling ring 25 is fixed to the upper part of the inner mold 4 and the outer molds 5 and 6 at a predetermined interval as shown in FIG. 3 and FIG. Are formed with a large number of coolant injection holes 26 at equal intervals, and a coolant supply pipe 27 is connected to the upper wall thereof.
次に、上述の如き構成の焼入冷却装置２を用いてコ字
状の薄板部材１を焼入冷却する際の動作並びに作用に付
き説明する。Next, an operation and an operation when the U-shaped thin plate member 1 is quenched and cooled using the quenching cooling device 2 having the above-described configuration will be described.
まず、浸炭放冷処理を旋したコ字状の薄板部材１の焼
入すべき一対の対向片部1a,1bを高周波誘導加熱コイル
等にて所要の焼入温度に加熱し、その後に薄板部材１の
開口側部分を内金型４に嵌着する。次いで、油圧シリン
ダ10を作動させることにより位置決め治具７を駆動し、
位置決め治具のテーパ面21a,21bを薄板部材１の一対の
屈曲部に線接触状態で当てがって、この薄板部材１を第
１図において矢印Ａ方向に押圧移動させる。これによ
り、薄板部材１の中間部分が前記テーパ面21a,21bと内
金型４の台形部4bの先端面との間に挾持されると共に、
その一対の対向片部1a,1bの内側面が内金型４の側面4d,
4eに対応配置される。First, a pair of opposed pieces 1a and 1b of the U-shaped thin plate member 1 to be quenched by the carburizing and cooling process are heated to a required quenching temperature by a high-frequency induction heating coil or the like. 1 is fitted to the inner mold 4. Next, the positioning jig 7 is driven by operating the hydraulic cylinder 10,
The tapered surfaces 21a and 21b of the positioning jig are applied to the pair of bent portions of the thin plate member 1 in a line contact state, and the thin plate member 1 is pressed and moved in the direction of arrow A in FIG. Thereby, the intermediate portion of the thin plate member 1 is sandwiched between the tapered surfaces 21a and 21b and the tip end surface of the trapezoidal portion 4b of the inner mold 4, and
The inner surfaces of the pair of opposed pieces 1a, 1b are the side surfaces 4d,
It is arranged corresponding to 4e.
このようにして薄板部材１を内金型４に位置決めした
状態で装着した後に、油圧シリンダ8,9を作動させるこ
とにより一対の外金型５及び６を第１図において矢印Ｂ
方向及び矢印Ｃ方向にそれぞれ駆動し、薄板部材１の一
対の対向片部1a,1bを内金型４と外金型5,6との間に挾持
する。これに伴い、薄板部材１は内金型４、外金型5,6
及び位置決め治具７にて所定位置に保持されると共に、
一対の対向片部1a,1bに内金型４及び外金型5,6が密着さ
れる。その結果、加熱状態の前記対向片部1a,1bはまず
始めに内金型４及び外金型5,6との密着接触により冷却
される（第１図の冷却工程）。After the thin plate member 1 is mounted on the inner mold 4 in such a manner as to be positioned, the hydraulic cylinders 8 and 9 are operated to move the pair of outer molds 5 and 6 in the direction indicated by the arrow B in FIG.
In the direction of arrow C and in the direction of arrow C to clamp the pair of opposed pieces 1a, 1b of the thin plate member 1 between the inner mold 4 and the outer molds 5, 6. Accordingly, the thin plate member 1 includes the inner mold 4 and the outer molds 5 and 6.
And held at a predetermined position by the positioning jig 7,
The inner mold 4 and the outer molds 5, 6 are brought into close contact with the pair of opposing pieces 1a, 1b. As a result, the facing pieces 1a and 1b in the heated state are first cooled by close contact with the inner mold 4 and the outer molds 5 and 6 (cooling step in FIG. 1).
次いで、パイプ18を介して冷却液を内金型４の冷却液
通路13に供給する。これに伴い、冷却液が前記通路13に
流れるので、薄板部材１の所定箇所すなわち一対の対向
片部1a,1bの焼入れすべき部分の内側面中央箇所が局部
的に急冷される（第２の冷却工程）。なお、前記通路13
を流れた冷却液は内金型４の外部へ排出されて所定の排
液路から装置外部へ導びかれる。Next, the coolant is supplied to the coolant passage 13 of the inner mold 4 via the pipe 18. Along with this, the coolant flows through the passage 13, so that a predetermined portion of the thin plate member 1, that is, a central portion on the inner surface of the portion of the pair of opposed pieces 1a, 1b to be hardened is locally quenched (second). Cooling step). The passage 13
Is discharged outside the inner mold 4 and guided to the outside of the apparatus from a predetermined drain passage.
これに引き続いて、パイプ19,20を介して冷却液を外
金型5,6の冷却液通路14,15に供給する。これに伴い、冷
却液が前記通路14,15に流れるので、薄板部材１の所定
箇所すなわち一対の対向片部1a,1bの焼入れすべき部分
の外側面中央箇所が局部的に急冷される（第３の冷却工
程）。なお、前記通路14,15を流れた冷却液は外金型5,6
の外部へ排出されて所定の排液路から装置外部へ導びか
れる。Subsequently, the coolant is supplied to the coolant passages 14 and 15 of the outer dies 5 and 6 via the pipes 19 and 20. Along with this, the coolant flows through the passages 14 and 15, so that a predetermined portion of the thin plate member 1, that is, a central portion on the outer surface of a portion of the pair of opposed pieces 1 a and 1 b to be quenched is locally quenched (No. 3 cooling step). The coolant flowing through the passages 14 and 15 is supplied to the outer molds 5 and 6.
And is guided to the outside of the apparatus from a predetermined drainage passage.
そして最後に、第３図及び第４図に示すように冷却環
25の噴射孔26から冷却液を噴射して、内金型４及び外金
型5.6と薄板部材１との非接触部分を冷却液にて常温ま
で急冷する（第４の冷却工程）。Finally, as shown in FIG. 3 and FIG.
Cooling liquid is injected from the 25 injection holes 26 to rapidly cool the non-contact portions between the inner die 4 and the outer die 5.6 and the thin plate member 1 to normal temperature with the cooling liquid (fourth cooling step).
以上の如く、被焼入物たる薄板部材１の一対の対向片
部1a,1bを焼入冷却するに際し、時間間隔（タイムラ
グ）を置いて対向片部1a,1bの各部の冷却を行なってそ
の各部における冷却速度を異ならしめながら焼入冷却
し、焼入処理を完了する。As described above, when quenching and cooling the pair of opposing pieces 1a and 1b of the thin plate member 1 to be quenched, each of the opposing pieces 1a and 1b is cooled with a time interval (time lag). Quenching and cooling are performed while varying the cooling rate in each part, and the quenching process is completed.
以上の如く本例では、被焼入物たる薄板部材１の各所
における冷却速度を制御するようにしているので、焼入
処理すべき部分の各所に発生する熱応力の大きさが異な
らしめられ、マルテンサイト変態開始時期が各所でそれ
ぞれ異ならしめられるため、薄板部材１の収縮量及び膨
張量を制御することができる。すなわち、収縮し易い箇
所は冷却速度を緩やかにして熱応力、変態応力を小さく
し、これによって収縮速度を局部的に調製することでき
る。一方、膨張し易い箇所は冷却速度を早くして熱応
力、変態応力を大きくし、これによって膨張速度を局部
的に調製することができる。換言すれば、薄板部材１の
一対の対向片部1a,1bにおける各部分の収縮開始及び終
了時点、並びに変態開始及び終了時点に変化を生ぜしめ
ることができ、その結果、焼入歪の発生を最小限に抑え
ることが可能となる。As described above, in this example, since the cooling rate in each part of the thin plate member 1 to be quenched is controlled, the magnitude of the thermal stress generated in each part of the part to be quenched is made different, Since the martensite transformation start time is made different in each place, the contraction amount and expansion amount of the thin plate member 1 can be controlled. In other words, the cooling rate is moderated at the portions that are likely to shrink to reduce the thermal stress and the transformation stress, whereby the shrinking speed can be locally adjusted. On the other hand, in a portion which is likely to expand, the cooling rate is increased to increase the thermal stress and the transformation stress, whereby the expansion rate can be locally adjusted. In other words, it is possible to cause a change in the contraction start and end points and the transformation start and end points of each part of the pair of opposed piece parts 1a and 1b of the thin plate member 1, and as a result, the occurrence of quenching strain is reduced. It can be minimized.
以下、本発明に係る焼入冷却方法を実施した具体例を
述べる。Hereinafter, a specific example in which the quenching and cooling method according to the present invention is performed will be described.
具体例 （１）薄板部材の材質 SCr420（浸炭放冷処理） （２）薄板部材の寸法 （ａ）全長:70mm （ｂ）板幅:13.40mm （ｃ）板厚:5.0mm （ｄ）対向片部の幅 外面間の長さ:43.77〜43.82mm 内面間の長さ:33.77〜33.82mm （３）冷却条件 （ａ）金型押圧力:1トン （ｂ）押圧時間:11秒 （ｃ）冷却液：ユーコンクエンチャントＡ （ｄ）冷却液の流量 内金型:8l/min 外金型:5l/min 冷却環:10l/min （ｅ）時間間隔（タイムラグ） （ｉ）第１の冷却工程終了後から第２の冷却工程開始時
までの時間間隔:1.5秒。Specific examples (1) Material of thin plate member SCr420 (Carburizing and cooling treatment) (2) Dimension of thin plate member (a) Overall length: 70 mm (b) Plate width: 13.40 mm (c) Plate thickness: 5.0 mm (d) Opposing piece Width of part Length between outer surfaces: 43.77 to 43.82mm Length between inner surfaces: 33.77 to 33.82mm (3) Cooling conditions (a) Mold pressing force: 1 ton (b) Pressing time: 11 seconds (c) Cooling Liquid: Yukon Quenchant A (d) Coolant flow rate Inner die: 8 l / min Outer die: 5 l / min Cooling ring: 10 l / min (e) Time interval (time lag) (i) First cooling step completed Time interval from the start to the start of the second cooling step: 1.5 seconds.
（ii）第２の冷却工程終了後から第３の冷却工程開始時
までの時間間隔:0.5秒。(Ii) Time interval from the end of the second cooling step to the start of the third cooling step: 0.5 second.
（ｆ）冷却時間 第１〜第４の各冷却工程においてそれぞれ10秒 上記条件により焼入冷却して得られた薄板部材の焼入
処理部分の断面硬さをビッカース硬度計にて測定したと
ころ、第５図に示す如き結果が得られた。第５図に示す
測定結果から明らかなように焼入処理表面より1mmの浸
炭層まで充分に硬化されており、最表面硬さはHMV820の
値を示している。また、内部硬さはHMV470〜490の値を
示しており、これらの値は材質SCr420の焼入硬さを示し
ている。(F) Cooling time 10 seconds in each of the first to fourth cooling steps. The cross-sectional hardness of the quenched portion of the thin plate member obtained by quenching and cooling under the above conditions was measured with a Vickers hardness meter. The result as shown in FIG. 5 was obtained. As is evident from the measurement results shown in FIG. 5, the surface was sufficiently hardened from the quenched surface to the carburized layer of 1 mm, and the outermost surface hardness shows the value of HMV 820. The internal hardness represents the value of H MV 470-490, these values indicate the quenching hardness of the material SCr420.
また測定個数10個、測定位置は薄板部材の開口端より
10,20,30,40,50mmの箇所をダイアルゲージを用いて歪測
定を行なったところ、下記の表に示す如き測定結果を得
た。なお、表に示す測定値は仕上り基準寸法（33.92m
m）に対する歪の大きさを示す。The measurement number is 10 and the measurement position is from the open end of the thin plate member.
Strain measurements were performed on 10, 20, 30, 40, and 50 mm portions using a dial gauge, and the measurement results as shown in the following table were obtained. The measured values shown in the table are the finished standard dimensions (33.92m
The magnitude of strain for m) is shown.
この表から明らかなように、仕上り寸法は各箇所にお
いて33.92±0.1mmであり、何れの部分も所要寸法内にあ
り、極めて小さな歪しか生じていないことが確認され
た。 As is clear from this table, the finished dimensions were 33.92 ± 0.1 mm at each location, and all of the dimensions were within the required dimensions, and it was confirmed that only a very small distortion occurred.
以上、本発明の一実施例に付き述べたが、本発明は既
述の実施例に限定されるものではなく、本発明の技術的
思想に基いて種々の変更が可能である。As described above, one embodiment of the present invention has been described, but the present invention is not limited to the above-described embodiment, and various modifications can be made based on the technical idea of the present invention.
例えば、既述の実施例においては薄板部材１の一対の
対向片部1a,1bの内側を冷却した後にその外側を冷却す
るようにしたが、これを逆に行なってもよい。また、コ
字状の薄板部材１でなく、Ｕ字状の薄板部材にも本発明
を適用し得る。For example, in the above-described embodiment, the inside of the pair of opposed pieces 1a and 1b of the thin plate member 1 is cooled and then the outside thereof is cooled. However, this may be reversed. Further, the present invention can be applied not only to the U-shaped thin plate member 1 but also to a U-shaped thin plate member.
e.発明の効果 以上の如く、本発明は、被焼入物であるコ字状又はＵ
字状の薄板部材の各部における冷却速度を変化させるよ
うにしたものであるから、収縮し易い部分は冷却速度を
緩やかにして熱応力、変態応力を小さくする一方、膨張
し易い部分は冷却速度を早くして熱応力、変態応力を大
きくすることにより、薄板部材の一対の対向片部の各部
分における収縮速度及び膨張速度の制御すなわち、各部
分における収縮開始及び終了時点、並びに膨張開始及び
終了時点の調製を行なうことができ、焼入歪を最小限に
抑えることができる。e. Effects of the Invention As described above, the present invention provides a U-shaped or U-shaped
Since the cooling rate at each part of the U-shaped thin plate member is changed, the cooling rate is moderated to reduce the thermal stress and the transformation stress in the parts that are easy to contract, while the cooling rate is reduced in the parts that are easy to expand. Controlling the contraction rate and expansion rate at each part of the pair of opposed pieces of the thin plate member by increasing the thermal stress and the transformation stress at a high speed, that is, the contraction start and end points, and the expansion start and end points at each part Can be prepared, and quenching distortion can be minimized.
第１図〜第５図は本発明の一実施例を説明するためのも
のであって、第１図は本発明に係る焼入冷却方法を実施
するための焼入冷却装置の平面図、第２図は薄板部材を
金型にて挾持した状態を示す斜視図、第３図は第２図に
おけるIII−III線断面図、第４図は第２図におけるIV−
IV線断面図、第５図は薄板部材の対向片部（焼入箇所）
の断面硬さの測定結果を示すグラフ、第６図及び第７図
は従来の焼入冷却方法を説明するためのものであって、
第６図は薄板部材を金型にて挾持した状態を示す斜視
図、第７図は同上の平面図である。 １…被焼入物である薄板部材、1a,1b…対向片部、２…
焼入冷却装置、４…内金型、5,6…外金型、７…位置決
め治具、8,9,10…油圧シリンダ、13,14,15…冷却液通
路。1 to 5 are views for explaining one embodiment of the present invention, and FIG. 1 is a plan view of a quenching cooling device for performing a quenching cooling method according to the present invention. 2 is a perspective view showing a state in which the thin plate member is clamped by a mold, FIG. 3 is a sectional view taken along the line III-III in FIG. 2, and FIG.
Fig. 5 is a cross-sectional view of the IV line.
FIGS. 6 and 7 are graphs showing the measurement results of the cross-sectional hardness of the quenching and cooling method of the related art,
FIG. 6 is a perspective view showing a state in which the thin plate member is held by a mold, and FIG. 7 is a plan view of the same. DESCRIPTION OF SYMBOLS 1 ... Thin plate member to be hardened, 1a, 1b ... Opposing piece part, 2 ...
Quenching / cooling device, 4 ... inner die, 5,6 ... outer die, 7 ... positioning jig, 8,9,10 ... hydraulic cylinder, 13,14,15 ... coolant passage.
Claims (1)
する一対の対向片部を加熱した後に、前記一対の対向片
部を金型の間にそれぞれ挾み込んで焼入冷却するように
した薄板部材の焼入冷却方法において、 （Ａ）所定の焼入温度に加熱した前記薄板部材の一対の
対向片部の間に内金型を配置すると共にその外側に外金
型をそれぞれ配置して、前記一対の対向片部の各々を前
記内金型と外金型との間に所要圧力をもってそれぞれ挾
み込むことにより、前記一対の対向片部を冷却する第１
の冷却工程と、 （Ｂ）前記内金型に設けられた冷却液通路に冷却液を供
給することにより、前記一対の対向片部を冷却する第２
の冷却工程と、 （Ｃ）前記外金型にそれぞれ設けられた冷却液通路に冷
却液を供給することにより、前記一対の対向片部を冷却
する第３の冷却工程と、 （Ｄ）前記内金型、外金型及び薄板部材に対して間隔を
置いて配設されたジャケットから冷却液を噴出すること
により、前記内金型及び外金型と前記薄板部材との非接
触部分を冷却する第４の冷却工程と、 をそれぞれ時間間隔を置いて行なうことによって、焼入
冷却すべき前記一対の対向片部の各部における冷却速度
を変化させるようにしたことを特徴とする薄板部材の焼
入冷却方法。After heating a pair of opposed pieces of a U-shaped or U-shaped thin plate member, the pair of opposed pieces are sandwiched between molds to perform quenching cooling. In the quenching and cooling method for a thin plate member, (A) an inner die is disposed between a pair of opposed pieces of the thin plate member heated to a predetermined quenching temperature, and an outer die is provided outside the inner die. And cooling the pair of opposed pieces by placing each of the pair of opposed pieces with a required pressure between the inner mold and the outer mold.
(B) supplying a coolant to a coolant passage provided in the inner mold to cool the pair of opposed pieces.
(C) a third cooling step of cooling the pair of opposing pieces by supplying a coolant to coolant channels provided in the outer mold, respectively; A non-contact portion between the inner mold and the outer mold and the thin plate member is cooled by jetting a cooling liquid from a jacket provided at an interval with respect to the mold, the outer mold and the thin plate member. Performing a fourth cooling step at a time interval, thereby changing a cooling rate in each of the pair of opposing pieces to be quenched and cooled. Cooling method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31927089A JP2826670B2 (en) | 1989-12-08 | 1989-12-08 | Quenching and cooling method for thin plate members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31927089A JP2826670B2 (en) | 1989-12-08 | 1989-12-08 | Quenching and cooling method for thin plate members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03180428A JPH03180428A (en) | 1991-08-06 |
| JP2826670B2 true JP2826670B2 (en) | 1998-11-18 |
Family
ID=18108335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31927089A Expired - Lifetime JP2826670B2 (en) | 1989-12-08 | 1989-12-08 | Quenching and cooling method for thin plate members |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2826670B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005519189A (en) * | 2002-02-28 | 2005-06-30 | アクラ テクニク アクチボラグ | Equipment used for curing |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106967871B (en) * | 2016-01-13 | 2019-05-21 | 哈尔滨飞机工业集团有限责任公司 | A kind of curved sheets quenching fixture |
-
1989
- 1989-12-08 JP JP31927089A patent/JP2826670B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005519189A (en) * | 2002-02-28 | 2005-06-30 | アクラ テクニク アクチボラグ | Equipment used for curing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03180428A (en) | 1991-08-06 |
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