JP2003001379A - Rotary drill for digging sprue of mold - Google Patents
Rotary drill for digging sprue of moldInfo
- Publication number
- JP2003001379A JP2003001379A JP2001179244A JP2001179244A JP2003001379A JP 2003001379 A JP2003001379 A JP 2003001379A JP 2001179244 A JP2001179244 A JP 2001179244A JP 2001179244 A JP2001179244 A JP 2001179244A JP 2003001379 A JP2003001379 A JP 2003001379A
- Authority
- JP
- Japan
- Prior art keywords
- drill
- digging
- sprue
- mold
- rotary drill
- 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
Landscapes
- Casting Devices For Molds (AREA)
- Milling Processes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、生砂鋳型を切削し
て横長穴湯口（トップランナ−）を掘るための鋳型の湯
口掘り用回転ドリルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary drill for digging a casting mold for cutting a green sand mold to dig a horizontal slot (top runner).
【０００２】[0002]
【従来の技術】従来、生砂鋳型に対し横長穴湯口を掘る
方法としては、習い溶断等で所望の形状にした一枚板の
回転ドリルを横移動させながら生砂鋳型を切削して横長
穴湯口を掘る方法が、特開２０００−１４０９９８号公
報により開示されている。2. Description of the Related Art Conventionally, as a method of digging a horizontal oblong hole gate in a green sand mold, a horizontal sand hole is cut by moving a single plate rotary drill having a desired shape such as fusing by cutting the green sand mold. A method of digging a sprue is disclosed in Japanese Patent Laid-Open No. 2000-140998.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記のような
一枚板の回転ドリルを使用して該回転ドリルを横移動さ
せながら生砂鋳型を切削して横長穴湯口を掘る場合、切
削した鋳物砂が真横方向に飛散するため、形成された湯
口の側壁面に付着し易い。この付着砂は注湯時の砂かみ
による鋳物不良を引き起こす原因となるもので、前記特
開２０００−１４０９９８号公報では、この付着砂を除
去するのに回転ドリルの横移動を往復させる等の配慮を
しているが、十分には除去しきれない場合があった。However, when the horizontal sand hole is dug by cutting the green sand mold while laterally moving the rotary drill of the single plate as described above, the cut casting is used. Since the sand is scattered in the lateral direction, it is easy to adhere to the side wall surface of the formed sprue. This adhered sand causes a casting defect due to sand biting at the time of pouring, and in the above-mentioned Japanese Patent Laid-Open No. 2000-140998, consideration is given to reciprocating the lateral movement of the rotary drill in order to remove the adhered sand. However, there were cases where it could not be removed completely.
【０００４】本発明は上記の問題に鑑みて成されたもの
で、生砂鋳型に横長穴湯口を掘る場合に生じる湯口側壁
面への鋳物砂の付着をほとんど無くし得る鋳型の湯口掘
り用回転ドリルを提供することを目的とする。The present invention has been made in view of the above problems, and is a rotary drill for digging a casting mold, which can almost eliminate the adhesion of foundry sand to the side wall surface of the casting gate, which occurs when digging a horizontally elongated casting spout in a fresh sand casting mold. The purpose is to provide.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
めに本発明における鋳型の湯口掘り用回転ドリルは、ド
リル本体に対し、ドリル本体側面に刃部を取付けるにあ
たり、該刃部をドリル回転方向に対し逃げ角を形成した
状態にして取付けることを特徴とする。In order to achieve the above-mentioned object, a rotary drill for gate removal of a mold according to the present invention is a rotary drill for rotating a blade part on a side surface of the drill body when the blade part is attached to the drill body. It is characterized in that it is mounted with a clearance angle formed with respect to the direction.
【０００６】また本発明における鋳型の湯口掘り用回転
ドリルは、前記ドリル本体及び刃部の全部又は周縁部に
焼入れを施したことを特徴とする。Further, the rotary drill for digging a casting mold according to the present invention is characterized in that all or a peripheral portion of the drill body and the blade portion is quenched.
【０００７】さらに本発明における鋳型の湯口掘り用回
転ドリルは、前記ドリル本体及び刃部におけるドリル回
転方向側に耐摩耗材をドリル本体及び刃部の外縁よりも
若干外側に突出させて取付けたことを特徴とする。Furthermore, in the rotary drill for digging a gate according to the present invention, a wear-resistant material is attached to the side of the drill body and the blade portion in the direction of rotation of the drill so as to project slightly outward from the outer edge of the drill body and the blade portion. Characterize.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施の形態を図１
（イ）〜（ヘ）に基づいて詳しく説明する。直立板状の
ドリル本体１の左右側面には、補強板２、２を介して刃
部３、３が溶接により固着されている。なお該刃部３、
３は、ドリル回転方向４に対し逃げ角５（本実施形態で
は約７度）を形成した状態にして取付けられている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
A detailed description will be given based on (a) to (f). Blades 3 and 3 are fixed to the left and right side surfaces of the upright plate-shaped drill body 1 through reinforcing plates 2 and 2 by welding. The blade portion 3,
3 is attached with a clearance angle 5 (about 7 degrees in this embodiment) formed with respect to the drill rotation direction 4.
【０００９】さらに、耐摩耗性を向上させるため、前記
ドリル本体１及び刃部３、３の周縁部におけるドリル回
転方向４側には、耐摩耗材としての超硬材６、６がドリ
ル本体１及び刃部３、３の外縁よりも若干外側に突出さ
れた状態で溶接（溶着、接着等でもよい）により固着さ
れている。なお耐摩耗性向上対策は、この方法に限定さ
れるものではなく、超硬材６、６を取付けずに、前記ド
リル本体１及び刃部３、３の全部又は周縁部に焼入れを
施すようにしてもよい。また図中符号７は図示されない
回転軸への取付け孔、符号８は該回転軸との位置決め用
溝である。Further, in order to improve wear resistance, cemented carbide materials 6, 6 as wear resistant materials are provided on the drill body 1 and the drill body 1 at the peripheral portions of the drill body 1 and the blade portions 3, 3 on the drill rotation direction 4 side. The blade portions 3 and 3 are fixed by welding (welding, bonding or the like) in a state of protruding slightly outward from the outer edges of the blade portions 3. The method for improving the wear resistance is not limited to this method, and quenching may be performed on all or the peripheral portions of the drill body 1 and the blade portions 3 and 3 without attaching the cemented carbide materials 6 and 6. May be. Further, in the drawing, reference numeral 7 is a mounting hole for a rotary shaft (not shown), and reference numeral 8 is a positioning groove for the rotary shaft.
【００１０】このように構成されたものは、ドリル本体
１を前記回転軸により水平回転させながら、図示されな
い生砂鋳型の下面に押し当て、上昇させた後、横方向へ
移動させることにより横長穴湯口が形成される。この
際、切削された鋳物砂は、前記刃部３、３及びそれに取
付けられた超硬材６、６がドリル回転方向４に対し逃げ
角５を形成した状態にされていることにより、真横方向
ではなく下方向に飛散される。そのため、鋳物砂が横長
穴湯口の側壁面に付着することがほとんどなくなる。With such a construction, the horizontal rotation of the drill body 1 is carried out by pressing it against the lower surface of the green sand mold (not shown) while raising it horizontally and then moving it in the lateral direction, so that the horizontally elongated hole is formed. A sprue is formed. At this time, the cut foundry sand is in a lateral direction because the blade portions 3 and 3 and the cemented carbide materials 6 and 6 attached thereto are in a state of forming a clearance angle 5 with respect to the drill rotation direction 4. Instead of being scattered downwards. Therefore, the foundry sand hardly adheres to the side wall surface of the horizontally elongated sprue.
【００１１】[0011]
【発明の効果】本発明は上記の説明から明らかなよう
に、ドリル本体に対し、ドリル本体側面に刃部を取付け
るにあたり、該刃部をドリル回転方向に対し逃げ角を形
成した状態にして取付けたから、生砂鋳型に横長穴湯口
を掘る場合に生じる湯口側壁面への鋳物砂の付着をほと
んど無くすことができる。そのため、注湯時の砂かみに
よる鋳物不良を減少させることができる。さらに湯口側
壁面の付着砂除去に必要なエアブロ−量を減らして、エ
ネルギ−消費量を低減させることができる等種々の効果
がある。As is apparent from the above description, the present invention attaches to the drill body with the blade portion attached to the side surface of the drill body with the clearance angle formed with respect to the rotation direction of the drill. Therefore, it is possible to almost eliminate the adhesion of the foundry sand to the side wall surface of the sprue, which occurs when the sprue having a horizontally long hole is dug in the green sand mold. Therefore, defective casting due to sand entrapment during pouring can be reduced. Further, there are various effects such that the amount of air blow required for removing the adhered sand on the side wall surface of the gate can be reduced to reduce the energy consumption.
【図１】（イ）：本発明の回転ドリルの実施形態を示す
正面図である。
（ロ）：（イ）における平面図である。
（ハ）：（イ）における底面図である。
（ニ）：（イ）における右側面図である。
（ホ）：（イ）におけるＢ−Ｂ矢視図である。
（ヘ）：（イ）におけるＡ−Ａ矢視拡大図である。FIG. 1A is a front view showing an embodiment of a rotary drill of the present invention. (B): It is a top view in (a). (C): It is a bottom view in (A). (D): It is a right view of (a). (E): It is a BB arrow line view in (a). (F): It is an AA arrow enlarged view in (a).
１ ドリル本体 ３ 刃部 ４ ドリル回転方向 ５ 逃げ角 ６ 耐摩耗材 1 drill body 3 blades 4 Drill rotation direction 5 clearance angle 6 Wear resistant material
Claims (3)
に刃部３、３を取付けるにあたり、該刃部３、３をドリ
ル回転方向４に対し逃げ角５を形成した状態にして取付
けることを特徴とする鋳型の湯口掘り用回転ドリル。1. When attaching the blade portions 3, 3 to the side surface of the drill body 1 with respect to the drill body 1, the blade portions 3, 3 are mounted in a state in which a clearance angle 5 is formed with respect to the drill rotation direction 4. A rotary drill for digging the gate of a characteristic mold.
又は周縁部に焼入れを施したことを特徴とする請求項１
記載の鋳型の湯口掘り用回転ドリル。2. The entire or a peripheral portion of the drill body 1 and the blade portions 3 and 3 is quenched.
A rotary drill for digging the sprue of the described mold.
るドリル回転方向４側に耐摩耗材６、６をドリル本体１
及び刃部３、３の外縁よりも若干外側に突出させて取付
けたことを特徴とする請求項１記載の鋳型の湯口掘り用
回転ドリル。3. The wear resistant material 6, 6 is provided on the drill body 1 and the blade portions 3, 3 on the drill rotation direction 4 side.
The rotary drill for digging a sprue according to claim 1, wherein the rotary drill is for projecting slightly outward from the outer edges of the blade portions 3 and 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001179244A JP2003001379A (en) | 2001-06-13 | 2001-06-13 | Rotary drill for digging sprue of mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001179244A JP2003001379A (en) | 2001-06-13 | 2001-06-13 | Rotary drill for digging sprue of mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003001379A true JP2003001379A (en) | 2003-01-07 |
Family
ID=19019834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001179244A Pending JP2003001379A (en) | 2001-06-13 | 2001-06-13 | Rotary drill for digging sprue of mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003001379A (en) |
-
2001
- 2001-06-13 JP JP2001179244A patent/JP2003001379A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20060323 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20061110 |
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| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20081219 |
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| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20090410 |