JPH02235548A - Manufacture of casting blade - Google Patents
Manufacture of casting bladeInfo
- Publication number
- JPH02235548A JPH02235548A JP5636089A JP5636089A JPH02235548A JP H02235548 A JPH02235548 A JP H02235548A JP 5636089 A JP5636089 A JP 5636089A JP 5636089 A JP5636089 A JP 5636089A JP H02235548 A JPH02235548 A JP H02235548A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- casting
- blade
- runner
- pouring
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000005266 casting Methods 0.000 title abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000012535 impurity Substances 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 5
- 238000007711 solidification Methods 0.000 abstract description 5
- 230000008023 solidification Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000792859 Enema Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000007920 enema Substances 0.000 description 1
- 229940095399 enema Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は大型送風機、例えばポイラ用排ガス送風機など
の動翼を鋳造によって製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a rotor blade for a large blower, such as an exhaust gas blower for a boiler, by casting.
従来の大型送風機用動翼を第３図、第４図に示す。第３
図はその外観図、第４図はそのボス部からの正面図であ
る。動翼は翼車に取付けるためのボス部０１と、幅広く
長い矩形状で肉厚は薄く送風性能上ねじれた形状の翼身
０２から構成されている。なお、第４図に示すように動
舅０２はボス部０１に明けられたボルト穴０３を介して
翼単に取付けられる。Conventional rotor blades for large blowers are shown in FIGS. 3 and 4. Third
The figure is its external view, and FIG. 4 is its front view from the boss portion. The rotor blade is composed of a boss part 01 for attaching to a blade wheel, and a blade blade 02 that is wide and long, rectangular, thin, and twisted for air blowing performance. Incidentally, as shown in FIG. 4, the wing 02 is simply attached to the wing through a bolt hole 03 made in the boss portion 01.
上記のような動翼を製作する方法として、皺造あるいは
鋳造による方法があるが、動翼の翼身が１？ＰＬ内外の
大型になると、加工性の悪い材料では異状に大きな鍛造
機が必要となるなど製作工数あるいは加工精度などの面
で不具合な点が多い。以上の面から、加工性の悪い金属
材料製大型動翼の製作には寿造が有利である。There are methods to manufacture the above-mentioned rotor blades, such as by corrugating or casting, but if the blade of the rotor blade is made of one blade? When it comes to larger sizes, both inside and outside of PL, there are many problems in terms of manufacturing man-hours and processing accuracy, such as the need for an abnormally large forging machine if the material is poorly workable. In view of the above, Juzo is advantageous for manufacturing large rotor blades made of metal materials that are difficult to work with.
従来の鋳造方法としては、第５図に示すように、ボス部
０１と舅身０２からなる本体の上部に押湯０４を設けた
鋳型０５の上部から注湯する上注ぎ法と、第６図に示す
ように、ボス部１１と翼身１２とからなる本体の上に押
湯１３を設け、さらに鋳型１４の上部に注湯口１７を有
する湯口箱１６よク、鋳型内に設けた湯道１５を通して
本体下部より溶湯を注入し、徐々に溶湯を上方に押上げ
てゆく下注ぎ法がある。Conventional casting methods include, as shown in FIG. 5, a top pouring method in which the metal is poured from the top of a mold 05, which has a riser 04 at the top of the main body consisting of a boss 01 and a leg 02; As shown in FIG. 2, a feeder 13 is provided on the main body consisting of a boss portion 11 and a blade 12, and a sprue box 16 having a pouring spout 17 on the upper part of the mold 14, a runner 15 provided in the mold. There is a bottom pouring method in which molten metal is injected from the bottom of the main body through a pipe, and the molten metal is gradually pushed upward.
しかし、上述した動翼のように薄肉、長物の鋳物では、
上注ぎ法では注湯後の溶湯が鋳型内で乱れて不純物の巻
込みや、熱の偏流による鋳造欠陥が生じ易いという不具
合があり、また下注ぎ法では不純物の巻込みは少ないも
のの下方の湯口から本体の上方へ徐々に注湯されるため
、本体下方は常に溶湯の高温Ｋさらされ高温となり、本
体上方と下方の温度差が小さく、凝固が本体下方から上
方に進行し、不純物なども上方の押湯部に押上げられて
ゆく健全な凝固形縣をとりにくく、鋳造欠陥の多い鋳物
となり易いという不具合があった。However, with thin and long castings like the rotor blades mentioned above,
In the top pouring method, the molten metal after pouring is disturbed in the mold, causing impurities to be drawn in, and casting defects due to uneven heat flow. Since the metal is gradually poured from the bottom to the top of the main body, the bottom of the main body is constantly exposed to the high temperature K of the molten metal and becomes high temperature.The temperature difference between the top and bottom of the main body is small, solidification progresses from the bottom to the top of the main body, and impurities are also poured upward. There was a problem in that it was difficult to obtain a healthy solidified shape as it was pushed up into the feeder section, and the resulting castings were likely to have many casting defects.
本発明は上記技術水準に鑑み、動翼、特に大型動具の椿
造に際し、従来技術におけるような不具合のない鋳造方
法を提供しようとするものである。In view of the above-mentioned state of the art, the present invention aims to provide a casting method that is free from the problems encountered in the prior art when molding moving blades, especially large moving tools.
本発明は鋳造翼の製作において、ボス部と翼身とからな
る翼の上部に、押湯を設けた鋳型の上記翼身の側面に沿
って細い堰を設け、該堰と連通ずる湯道を通してその湯
口から注湯することを特徴とする鋳造翼の製造方法であ
る。In the production of cast blades, the present invention provides a thin weir along the side of the blade of a mold provided with a riser in the upper part of the blade consisting of a boss part and a blade blade, and a runner that communicates with the weir is passed through the mold. This method of manufacturing a cast blade is characterized by pouring the metal from the sprue.
本体鋳型内に注湯された溶湯が乱れなく、静かに鋳物下
方から上方に充填されてゆき、下方から徐々に凝固が進
行するので、不純物の巻込みや異常凝固による欠陥を含
まない健全な鋳物を得ることがで轡る。The molten metal poured into the main mold is silently filled from the bottom to the top of the casting without any disturbance, and solidification progresses gradually from the bottom, resulting in a healthy casting without any defects caused by impurities or abnormal solidification. You can earn money by getting it.
以下、本発明による送風機用動■の製造の一実施例を第
１図、第２図によって説明する。第１図は鉤造涛型の縦
断而図、第２図は第１図■一■線断面図である。Hereinafter, one embodiment of manufacturing a blower drive according to the present invention will be described with reference to FIGS. 1 and 2. Figure 1 is a vertical cross-sectional view of the hook-shaped ridge, and Figure 2 is a cross-sectional view taken along the line ■■ in Figure 1.
第１図に示すように、ボス部１と翼身２からなる本体の
上部に押湯３を設けた涛型４に、翼身２の横側から注湯
するための湯道５と、翼身２のほぼ全長にわたって湯道
５とつながった空間をもつ堰５ａを設け、これらの上方
に注腸のだめの湯口６をもつ湯口箱７を配する。As shown in FIG. 1, a runner 4 is provided with a riser 3 on the upper part of a main body consisting of a boss 1 and a blade 2, and a runner 5 for pouring hot water from the side of the blade 2, and a runner 5 for pouring metal from the side of the blade 2. A weir 5a having a space connected to a runner 5 is provided over almost the entire length of the body 2, and a sprue box 7 having a sprue 6 for enema reservoir is arranged above these.
湯口６から注湯を開始すると、湯道５の下方から徐々に
満された溶湯は堰５ａを通って徐々に翼身２の下方から
静か′に満されてゆき上方へ向う。このとき、溶湯が上
方へ向うとともに翼身２に満された溶湯の温度は下方か
ら徐々に冷却されてゆき、溶湯の流れが静かなため、乱
流や不純物の巻込みなどは生じず、凝固が下方から徐々
に進行する。このため、不縄物や引巣は上方の押湯３に
集中し、健全な鋳物を得ることができる。When pouring is started from the sprue 6, the molten metal gradually fills the runner 5 from below, passes through the weir 5a, gradually fills the wing blade 2 from below silently, and moves upward. At this time, as the molten metal moves upward, the temperature of the molten metal filling the blade 2 is gradually cooled from below, and since the molten metal flows quietly, no turbulence or entrainment of impurities occurs, and it solidifies. progresses gradually from below. Therefore, unstructured objects and cavities are concentrated in the upper feeder 3, and a sound casting can be obtained.
なお、第１図では堰５ａは翼身２とほぼ同じ長さになっ
ているが、これは押湯５までの長さにしてもよく、また
翼身２だけ横の堰５ａで祷込んで、ボス部１以上の位置
には押湯３上部から注湯するようにしてもよい。In addition, in Fig. 1, the weir 5a is approximately the same length as the blade 2, but this may be made as long as the riser 5, or the weir 5a next to the blade 2 may be prayed. , the hot water may be poured into the position above the boss portion 1 from above the riser 3.
本発明Ｋより、横堰から溶湯を翼身に静かに鋳込むため
、不純物の巻込みや、凝固形態不良などによる鋳造欠陥
を含まない健全な鋳造動翼を得ることができる。According to the present invention K, since the molten metal is quietly cast into the blade from the horizontal weir, it is possible to obtain a sound cast rotor blade free from casting defects due to entrainment of impurities or poor solidification form.
第１図は本発明の一実施例である鋳造翼のり作方法の説
明図、第２図は第１図の■−■断面図、第３図は大型送
風機用動翼の外観図、第４図は第３図のボス部からの正
面図、第５図は従来の鋳造方法で上注き法の説明図、第
６図は従来の鋳造方法で下注ぎ法の説明図を示す。Fig. 1 is an explanatory diagram of a method of manufacturing a cast blade according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the line ■-■ of Fig. 1, Fig. 3 is an external view of a rotor blade for a large blower, and Fig. 4 The drawings are a front view from the boss part of FIG. 3, FIG. 5 is an explanatory diagram of the top pouring method in a conventional casting method, and FIG. 6 is an explanatory diagram of the bottom pouring method in the conventional casting method.
Claims (1)
部に、押湯を設けた鋳型の上記翼身の側面に沿つて細い
堰を設け、該堰と連通する湯道を通してその湯口から注
湯することを特徴とする鋳造翼の製造方法。In the production of cast blades, a thin weir is installed along the side of the blade of the mold with a riser in the upper part of the blade, which consists of a boss part and a blade, and a runner is passed from the sprue through a runner that communicates with the weir. A method for manufacturing a cast blade, characterized by pouring metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5636089A JPH02235548A (en) | 1989-03-10 | 1989-03-10 | Manufacture of casting blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5636089A JPH02235548A (en) | 1989-03-10 | 1989-03-10 | Manufacture of casting blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02235548A true JPH02235548A (en) | 1990-09-18 |
Family
ID=13025078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5636089A Pending JPH02235548A (en) | 1989-03-10 | 1989-03-10 | Manufacture of casting blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02235548A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836964A (en) * | 2012-08-23 | 2012-12-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Pouring system for blade casting with thin core and crown |
-
1989
- 1989-03-10 JP JP5636089A patent/JPH02235548A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836964A (en) * | 2012-08-23 | 2012-12-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Pouring system for blade casting with thin core and crown |
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