JPH05318073A - Metallic mold casting method - Google Patents
Metallic mold casting methodInfo
- Publication number
- JPH05318073A JPH05318073A JP4148065A JP14806592A JPH05318073A JP H05318073 A JPH05318073 A JP H05318073A JP 4148065 A JP4148065 A JP 4148065A JP 14806592 A JP14806592 A JP 14806592A JP H05318073 A JPH05318073 A JP H05318073A
- Authority
- JP
- Japan
- Prior art keywords
- pouring
- casting
- molten metal
- cooling
- time
- 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.)
- Granted
Links
- 238000005266 casting Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims description 5
- 238000004512 die casting Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 239000002344 surface layer Substances 0.000 description 6
- 238000005336 cracking Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Radiation Pyrometers (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋳造品質を高めるため
の金型鋳造法の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in a die casting method for improving casting quality.
【０００２】[0002]
【従来の技術】従来、例えば自動車のエンジン部品であ
るカムシャフト等の鋳造法として、本出願人は既に、キ
ャビティ内の溶湯の表層のみが凝固し内部が未だ未凝固
の状態で型開きして製品を取り出すような鋳造法を提案
している。すなわち、金型で鋳造する場合には成形精度
は向上するものの、成形品の全体が完全に凝固するまで
その周囲を拘束しておくと、凝固中或いは凝固直後に内
部応力等によって熱間割れが生ずるといった問題がある
ため、殻状の凝固層が得られた時点で型開きするという
ものであり、かかる金型鋳造法においては、例えば注湯
ポットから金型のキャビティ内に所定量の溶湯を注湯し
た後、必要箇所を冷却機構によって設定時間だけ冷却
し、冷却した箇所の表層組織のチル化を促進させつつ表
層全体が半凝固状態となった時点で型開きするようにし
ている。そして、例えば冷却が不均一であると、所望の
箇所に所望のチル組織が成形されず耐磨耗性に欠ける等
の欠陥を招くことから、冷却機構による冷却を正確に管
理する必要があった。2. Description of the Related Art Conventionally, for example, as a casting method for a camshaft which is an engine part of an automobile, the present applicant has already opened the mold in a state where only the surface layer of the molten metal in the cavity is solidified and the inside is still unsolidified. We propose a casting method that takes out the product. That is, when casting with a die, the molding accuracy is improved, but if the periphery of the molded product is restrained until it is completely solidified, hot cracking may occur due to internal stress during solidification or immediately after solidification. Since there is a problem that it occurs, the mold is opened when the shell-shaped solidified layer is obtained.In such a mold casting method, for example, a predetermined amount of molten metal is poured from the pouring pot into the cavity of the mold. After pouring, the necessary parts are cooled by a cooling mechanism for a set time, and the chilling of the surface layer structure at the cooled parts is promoted, and the mold is opened when the entire surface layer becomes semi-solidified. Then, for example, if the cooling is not uniform, a desired chill structure is not formed in a desired portion and a defect such as lack of wear resistance is caused. Therefore, it is necessary to accurately manage the cooling by the cooling mechanism. .
【０００３】[0003]
【発明が解決しようとする課題】しかしながら従来の場
合、特に注湯ポットから数ショットの注湯を連続的に行
って鋳造サイクルを向上させようとするような場合に、
冷却が不均一になりやすいという問題があった。すなわ
ち、通常、冷却機構は注湯ポットの傾動を検出するセン
サ等に連結され、かかる検出信号によって作動するよう
に構成されているが、注湯ポットの容量が数ショット分
の注湯回数に対応し得るものである時には、例えば１回
目と３回目とでは実際に注湯が始まる注湯ポットの傾動
角に誤差が生じ、これに対して画一的に注湯ポットが所
定角になった時に作動するセンサ等で冷却機構を作動さ
せても、実際の冷却時間が狂うからである。However, in the conventional case, especially when trying to improve the casting cycle by continuously pouring several shots from the pouring pot,
There is a problem that the cooling tends to be non-uniform. That is, normally, the cooling mechanism is connected to a sensor or the like that detects tilting of the pouring pot and is configured to operate by the detection signal, but the capacity of the pouring pot corresponds to the number of times of pouring for several shots. When there is an error in the tilt angle of the pouring pot at which pouring actually starts, for example, the tilt angle of the pouring pot at which the pouring actually starts is different from that when the pouring pot has a predetermined angle. This is because even if the cooling mechanism is operated by an operating sensor or the like, the actual cooling time is changed.
【０００４】[0004]
【課題を解決するための手段】かかる課題を解決するた
め、本発明は注湯ポットから金型内に注湯し冷却するよ
うにした金型鋳造方法において、注湯ポットから金型内
に注湯する際、溶湯の注湯状況を赤外線センサによって
検知し、この検知信号によって鋳込み時間と冷却条件を
管理するようにした。In order to solve the above problems, the present invention provides a mold casting method in which a pouring pot is poured into a mold to cool it, and a pouring pot is poured into the mold. When pouring, the state of pouring the molten metal is detected by an infrared sensor, and the detection signal controls the casting time and cooling conditions.
【０００５】[0005]
【作用】金型内の溶湯の鋳込み時間、冷却の開始時点、
冷却時間等の鋳造条件の設定を実際の溶湯の注湯状況に
適合させることが出来、鋳造品質を安定させることが出
来る。[Operation] Casting time of the molten metal in the mold, start of cooling,
The setting of casting conditions such as cooling time can be adapted to the actual molten metal pouring condition, and the casting quality can be stabilized.
【０００６】[0006]
【実施例】本発明の金型鋳造法の実施例について説明す
る。EXAMPLES Examples of the die casting method of the present invention will be described.
【０００７】本発明の金型鋳造法は、自動車のエンジン
部品であるカムシャフトを鋳造するような鋳造法として
適用され、このカムシャフトは、例えば図１に示すよう
な縦鋳込横型鋳造機によって鋳造される。The die casting method of the present invention is applied as a casting method for casting a camshaft which is an engine part of an automobile. The camshaft is produced by, for example, a vertical casting horizontal casting machine as shown in FIG. Cast.
【０００８】そしてこの金型１は、湯口部２にランナ
３、ゲート４を介して連通するカムシャフト成形用のキ
ャビティ５を備えており、注湯ポット６から湯口部２を
介して注湯された溶湯をキャビテイ５に導くことが出来
るようにされるとともに、キャビティ５のカム成形部周
辺を局部的に冷却するための冷却機構７と、注湯前にキ
ャビティ５のカムシャフトの軸成形部周辺を局部的に加
熱しておくための加熱機構８を備えている。The mold 1 is provided with a cavity 5 for forming a camshaft, which communicates with the sprue part 2 via a runner 3 and a gate 4, and is poured from a pouring pot 6 via the spout part 2. The molten metal can be guided to the cavity 5, and the cooling mechanism 7 for locally cooling the periphery of the cam forming portion of the cavity 5 and the periphery of the shaft forming portion of the cam shaft of the cavity 5 before pouring the molten metal are provided. A heating mechanism 8 for locally heating is provided.
【０００９】そしてこの冷却機構７と加熱機構８は、夫
々の冷却回路７ａ、加熱回路８ａを備えており、かかる
冷却回路７ａ、加熱回路８ａがキャビテイ５周囲の必要
箇所に向けて延出している。尚、図面では回路７ａ、８
ａの一部を省略している。The cooling mechanism 7 and the heating mechanism 8 are provided with a cooling circuit 7a and a heating circuit 8a, respectively, and the cooling circuit 7a and the heating circuit 8a extend toward necessary locations around the cavity 5. . In the drawing, the circuits 7a and 8
A part of a is omitted.
【００１０】因みに、注湯前に軸部周辺を加熱しておく
のは、注湯時の湯流れ性を良好にし、注湯された溶湯が
急冷されて割れ等を起こすような不具合をなくすためで
あり、注湯後にカム部周辺を冷却するのは、同部の表層
のチル化を促進するためである。By the way, the reason why the periphery of the shaft is heated before pouring is to improve the flowability of the molten metal during pouring and to eliminate the problems such as the molten metal being rapidly cooled and cracking. The reason for cooling the periphery of the cam portion after pouring is to promote chilling of the surface layer of the same portion.
【００１１】ところで、本発明の場合は、注湯ポット６
と湯口部２の間に赤外線センサ１０を設けている。By the way, in the case of the present invention, the pouring pot 6
An infrared sensor 10 is provided between the spout part 2 and the sprue part 2.
【００１２】この赤外線センサ１０は、溶湯から放射さ
れる赤外線を検知するためのものであり、注湯ポット６
から溶湯が実際に流れ出す時点、及び溶湯の流れが実際
に終了した時点を正確に検知出来る。つまり、従来のよ
うに注湯ポット６の傾きによって検知するものではない
ため、注湯ポット６内への溶湯の残量に左右されること
がない。The infrared sensor 10 is for detecting infrared rays emitted from the molten metal, and is used for the pouring pot 6
It is possible to accurately detect the time when the molten metal actually flows out of the tank and the time when the molten metal flow actually ends. In other words, it is not detected by the inclination of the pouring pot 6 as in the conventional case, so that it does not depend on the remaining amount of the molten metal in the pouring pot 6.
【００１３】そして、かかる赤外線センサ１０の検知信
号によって鋳造条件を管理するようにしているが、かか
る鋳造条件を管理する方法の一例については次の通りで
ある。The casting condition is controlled by the detection signal of the infrared sensor 10. An example of the method for controlling the casting condition is as follows.
【００１４】すなわち、まず注湯ポット６を傾動させて
金型キャビティ５内へ注湯を開始すると、溶湯から放射
される赤外線を赤外線センサ１０が検知し、この検知信
号によって注湯時間タイマを作動させるとともに、それ
まで湯流れ性を良好にする等のためにキャビティ５のカ
ムシャフトの軸成形部周辺を加熱していた加熱機構８を
停止させる。That is, first, when the pouring pot 6 is tilted to start pouring into the mold cavity 5, the infrared sensor 10 detects the infrared rays emitted from the molten metal, and the pouring time timer is activated by this detection signal. At the same time, the heating mechanism 8 that has been heating the periphery of the shaft forming portion of the cam shaft of the cavity 5 is stopped in order to improve the flowability of the molten metal.
【００１５】そして、この注湯時間タイマのオン作動か
ら所定時間だけ注湯が行われ、所定時間が経過すると注
湯を停止させる。そして、かかる注湯時間はそれまでの
注湯実績等から予め設定されているものである。Then, pouring is performed for a predetermined time after the pouring time timer is turned on, and the pouring is stopped when the predetermined time has elapsed. The pouring time is preset based on the past pouring results and the like.
【００１６】そして赤外線センサ１０が注湯ポット６か
らの溶湯の流出を検知しなくなった時点で冷却機構７の
冷却タイマを作動させ、キャビティ５のカムシャフトの
カム成形部周辺を一定時間冷却する。又、同時に鋳込み
時間を設定するためのキュアタイマを作動させる。When the infrared sensor 10 no longer detects the outflow of the molten metal from the pouring pot 6, the cooling timer of the cooling mechanism 7 is activated to cool the periphery of the cam forming portion of the cam shaft of the cavity 5 for a certain period of time. At the same time, a cure timer for setting the pouring time is activated.
【００１７】かかる冷却機構７による冷却時間、及びキ
ュアタイムは、キャビティ５内のカムシャフトのカム部
表層がチル化され、又、カムシャフト内部が未凝固で表
層のみが凝固層となるように予め実績データ等に基づき
設定されている。The cooling time and the curing time by the cooling mechanism 7 are set beforehand so that the surface layer of the cam portion of the camshaft in the cavity 5 is chilled, and the inside of the camshaft is not solidified and only the surface layer is a solidified layer. It is set based on actual data.
【００１８】そして本案では加熱機構８の加熱停止時
期、冷却機構７の冷却開始時期を確実に注湯が終えた一
定の時点に設定出来るため、冷却のタイミング、冷却時
間、鋳込み時間等が従来のようにばらつかない。しかも
かかる冷却時間、鋳込み時間等は、鋳造実績を爾後の冷
却時間等の設定にフィードバックさせることによってよ
り品質の高い鋳造が可能となる。Further, in the present invention, the heating stop timing of the heating mechanism 8 and the cooling start timing of the cooling mechanism 7 can be set to a certain point in time when the pouring of the molten metal is completed, so that the cooling timing, the cooling time, the pouring time, etc. It doesn't scatter. In addition, the cooling time, casting time, etc. can be fed back to the setting of the cooling time, etc. after the casting results, so that higher quality casting can be performed.
【００１９】しかも赤外線センサ１０によって測定、記
録した実際の注湯時間は精度の高いものであり、これを
爾後の注湯時間タイマの設定時間に反映させることによ
って注湯量の設定等もより正確に管理出来ることにな
る。Moreover, the actual pouring time measured and recorded by the infrared sensor 10 is highly accurate, and by reflecting this in the setting time of the subsequent pouring time timer, the setting of the pouring amount and the like can be performed more accurately. It will be manageable.
【００２０】そしてキュアタイムによって設定された時
間が経過すると、金型の開指令が出され、鋳造が完了す
る。そして厳密に管理された鋳造条件によって成形され
た鋳造品の鋳造品質は均一である。When the time set by the cure time has elapsed, a mold opening command is issued and the casting is completed. And, the casting quality of the cast product formed by strictly controlled casting conditions is uniform.
【００２１】因みに、本実施例では赤外線センサ１０が
不調時に作動するバックアップ回路を設け、注湯ポット
６が傾動して所定時間しても赤外線センサ１０が作動し
ない時は、別個の系統で冷却機構７を作動させ、キュア
タイマを作動させるようにしている。By the way, in this embodiment, a backup circuit is provided for operating the infrared sensor 10 when it is out of order, and when the pouring pot 6 tilts and the infrared sensor 10 does not operate for a predetermined time, a cooling mechanism is provided in a separate system. 7 is activated and the cure timer is activated.
【発明の効果】以上のように本発明の金型鋳造方法は、
溶湯の注湯状況を赤外線センサによって検知し、溶湯が
実際に金型内に注湯された時期に合せて冷却を開始し、
又、鋳込み時間を決定する等の鋳造条件を管理するよう
にしたため、鋳造品の鋳造品質を安定させることが出来
る。As described above, the mold casting method of the present invention is
The molten metal pouring status is detected by the infrared sensor, cooling is started at the time when the molten metal is actually poured into the mold,
Moreover, since the casting conditions such as determining the casting time are controlled, the casting quality of the cast product can be stabilized.
【図１】金型の全体図[Figure 1] Overall view of the mold
１ 金型 ６ 注湯ポット １０ 赤外線センサ 1 mold 6 pouring pot 10 infrared sensor
フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ２２Ｄ 17/22 Ｄ 8926−4Ｅ 17/32 Ｚ 8926−4Ｅ (72)発明者 佐藤 秀雄 三重県鈴鹿市平田町1907番地 本田技研工 業株式会社鈴鹿製作所内Continuation of the front page (51) Int.Cl. 5 Identification number Reference number within the agency FI Technical display location // B22D 17/22 D 8926-4E 17/32 Z 8926-4E (72) Inventor Hideo Sato Suzuka City, Mie Prefecture 1907 Hiratacho Honda Motor Co., Ltd. Suzuka Factory
Claims (1)
却するようにした金型鋳造方法において、前記注湯ポッ
トから金型内への溶湯の注湯状況を赤外線センサによっ
て検知し、この検知信号によって鋳込み時間と冷却条件
を管理することを特徴とする金型鋳造方法。1. A method for casting a mold in which the molten metal in a pouring pot is poured into a mold and cooled, and an infrared sensor detects the pouring status of the molten metal from the pouring pot into the mold. Then, the die casting method is characterized in that the casting time and the cooling conditions are controlled by this detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4148065A JP2756626B2 (en) | 1992-05-15 | 1992-05-15 | Mold casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4148065A JP2756626B2 (en) | 1992-05-15 | 1992-05-15 | Mold casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05318073A true JPH05318073A (en) | 1993-12-03 |
| JP2756626B2 JP2756626B2 (en) | 1998-05-25 |
Family
ID=15444417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4148065A Expired - Fee Related JP2756626B2 (en) | 1992-05-15 | 1992-05-15 | Mold casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2756626B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014034058A (en) * | 2012-08-10 | 2014-02-24 | Yanmar Co Ltd | System and method for control of casting quality |
| CN104959539A (en) * | 2015-06-17 | 2015-10-07 | 陈文建 | Forging method of heat resistant steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6241829A (en) * | 1985-08-14 | 1987-02-23 | 松下電工株式会社 | Privates washing apparatus |
| JPS6442790A (en) * | 1987-08-10 | 1989-02-15 | Shibaura Eng Works Ltd | Vending machine |
| JPH0318453A (en) * | 1989-06-13 | 1991-01-28 | Mazda Motor Corp | Cooling device in die for casting |
| JPH048140A (en) * | 1990-04-24 | 1992-01-13 | Nippondenso Co Ltd | Rotary electric machine |
-
1992
- 1992-05-15 JP JP4148065A patent/JP2756626B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6241829A (en) * | 1985-08-14 | 1987-02-23 | 松下電工株式会社 | Privates washing apparatus |
| JPS6442790A (en) * | 1987-08-10 | 1989-02-15 | Shibaura Eng Works Ltd | Vending machine |
| JPH0318453A (en) * | 1989-06-13 | 1991-01-28 | Mazda Motor Corp | Cooling device in die for casting |
| JPH048140A (en) * | 1990-04-24 | 1992-01-13 | Nippondenso Co Ltd | Rotary electric machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014034058A (en) * | 2012-08-10 | 2014-02-24 | Yanmar Co Ltd | System and method for control of casting quality |
| CN104959539A (en) * | 2015-06-17 | 2015-10-07 | 陈文建 | Forging method of heat resistant steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2756626B2 (en) | 1998-05-25 |
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