JPS644871B2 - - Google Patents
Info
- Publication number
- JPS644871B2 JPS644871B2 JP9612082A JP9612082A JPS644871B2 JP S644871 B2 JPS644871 B2 JP S644871B2 JP 9612082 A JP9612082 A JP 9612082A JP 9612082 A JP9612082 A JP 9612082A JP S644871 B2 JPS644871 B2 JP S644871B2
- Authority
- JP
- Japan
- Prior art keywords
- bearing bracket
- mold
- casting
- flash
- weir
- 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
Links
- 238000005266 casting Methods 0.000 claims description 13
- 230000013011 mating Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000005422 blasting Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000001010 compromised effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は回転電機などの軸受ブラケツトの鋳造
方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for casting a bearing bracket for a rotating electric machine or the like.
第１図は一般の全閉外扇形回転電機の構造を示
し、固定子１の両側に取付ける軸受ブラケツト２
に軸受３を介して回転子４が回転自在に支持し、
固定子１と軸受ブラケツト２とは取付ボルト５に
より締結されている。
Figure 1 shows the structure of a general totally enclosed external fan-shaped rotating electric machine, with bearing brackets 2 attached to both sides of a stator 1.
A rotor 4 is rotatably supported via a bearing 3,
The stator 1 and the bearing bracket 2 are fastened together with mounting bolts 5.
第２図および第３図は軸受ブラケツト２を示
し、固定子１に嵌合するいんろう部２ａの加工部
分を最小にするため取付座２ｂをいんろう部２ａ
がｌだけ離し、端面２ｃを加工しないのが一般的
である。ｌは回転電機の大きさによつて２〜５mm
であり、鋳造するのには第４図の鋳型を使用して
いた。 2 and 3 show the bearing bracket 2, and in order to minimize the machining part of the spigot part 2a that fits into the stator 1, the mounting seat 2b is attached to the spigot part 2a.
It is common that the end faces 2c are separated by l, and the end faces 2c are not processed. l is 2 to 5 mm depending on the size of the rotating electrical machine
The mold shown in Figure 4 was used for casting.
第４図は軸受ブラケツト２の従来の鋳型であつ
て、下型６に上型７をのせ、型合せ面８は軸受ブ
ラケツト２の取付座２ｂの固定子側の面２ｃに相
当する鋳型の面２c′に設け、湯口９より軸受ブラ
ケツト２に相当する空間１０に溶湯を鋳込んで軸
受ブラケツト２の素材を鋳造する。 FIG. 4 shows a conventional mold for a bearing bracket 2, in which an upper mold 7 is placed on a lower mold 6, and a mold mating surface 8 is the surface of the mold corresponding to the stator side surface 2c of the mounting seat 2b of the bearing bracket 2. 2c', and the material for the bearing bracket 2 is cast by pouring molten metal into the space 10 corresponding to the bearing bracket 2 through the sprue 9.
このように鋳造された軸受ブラケツト２は第５
図のように固定側の面２ｃに鋳ばり２ｄが形成さ
れると同時に第６図のように外周部２ｅに湯口９
の切断時の鋳ばり２ｆは生じていた。このため鋳
造後砂落しのシヨツトブラスト等の仕上処理をし
ても鋳ばり２ｄおよび２ｆは大きなばりとして残
るのでグラインダー等で削り取つていた。 The bearing bracket 2 cast in this way is the fifth
As shown in the figure, a flash 2d is formed on the fixed side surface 2c, and at the same time, a sprue 9 is formed on the outer peripheral part 2e as shown in FIG.
A flash 2f was formed during cutting. For this reason, even if finishing treatments such as shot blasting to remove sand are carried out after casting, the casting burrs 2d and 2f remain as large burrs, which are removed using a grinder or the like.
しかしながら、鋳ばり２ｄおよび２ｆは軸受ブ
ラケツト２の外周部２ｅの曲面に形成されていた
るため、グラインダー等で削り取る時に曲面に沿
つて削り取るのが困難であり、仕上跡が外周部２
ｅに残つて美観上好ましくなかつた。さらに下型
６と上型７の芯ずれが生ずると外周部２ｅに段差
が生じ美観を悪くするなどの欠点があつた。
However, since the flashes 2d and 2f are formed on the curved surface of the outer circumference 2e of the bearing bracket 2, it is difficult to scrape them off along the curved surface using a grinder or the like, and the finishing marks remain on the outer circumference 2e.
e, which was not aesthetically pleasing. Furthermore, when the lower mold 6 and the upper mold 7 are misaligned, a step is formed on the outer circumferential portion 2e, resulting in an unsightly appearance.
本発明は上記欠点に鑑みなされたもので、鋳ば
り仕上を廃止すると共に下型と上型とに芯ずれが
生じても美観をそこなわないような軸受ブラケツ
トの鋳造方法を提供することを目的とする。
The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a method for casting a bearing bracket that eliminates the casting flash finish and that does not impair the aesthetic appearance even if misalignment occurs between the lower mold and the upper mold. shall be.
すなわち、鋳型の上型と下型との型合せ面の軸
受ブラケツトの外周部に帯状の突部を形成する溝
を設け、湯口の型合せ面に形成するせきを角部に
切欠き容易に設けて鋳造するようにしたものであ
る。
That is, a groove forming a band-shaped protrusion is provided on the outer periphery of the bearing bracket on the matching surface of the upper mold and the lower mold of the mold, and a weir to be formed on the mold matching surface of the sprue is cut out at the corner so that it can be easily provided. It was designed so that it could be cast.
以下本発明を図面に示す一実施例について説明
する。第７図は軸受ブラケツト２の鋳型であつ
て、下型６に上型７をのせ、型合せ面８は軸受ブ
ラケツト２の取付座２ｂの固定子側の面２ｃに相
当する鋳型の面２c′に設け、湯口９は型合せ面８
の角部よりせき９ａを通して軸受ブラケツト２に
相当する空間１０に溶湯を導くようになつてい
る。型合せ面８の軸受ブラケツト外周部には取付
座２ｂを除いた全周にわたつて帯状の突部を形成
する凹部１１を形成し、その大きさは取付座２ｂ
とブラケツト２の肉厚に比べて小さい。
An embodiment of the present invention shown in the drawings will be described below. FIG. 7 shows a mold for a bearing bracket 2, in which an upper mold 7 is placed on a lower mold 6, and a mold mating surface 8 is a surface 2c' of the mold corresponding to the stator side surface 2c of the mounting seat 2b of the bearing bracket 2. The sprue 9 is provided on the mold matching surface 8.
The molten metal is introduced into the space 10 corresponding to the bearing bracket 2 from the corner of the bearing bracket 2 through the weir 9a. A recess 11 is formed on the outer periphery of the bearing bracket on the mold matching surface 8 to form a band-shaped protrusion over the entire circumference excluding the mounting seat 2b, and its size is equal to that of the mounting seat 2b.
and is smaller than the wall thickness of bracket 2.
次に作用を説明する。第８図は第７図の鋳型に
て鋳造された軸受ブラケツト２であるが、実際に
は第９図のように型合せした固定子側の面２ｃに
おいて鋳ばり２ｄが形成される。この軸受ブラケ
ツト２を砂落し処理としてシヨツトブラストをか
けると鋳ばり２ｄの鋭角な部分はなくなり突部１
２の上面に線状に残るのみとなる。従つて突部１
１によつて既に軸受ブラケツト２の外周部２ｅに
は帯状の突部１２が形成されているので鋳ばり２
ｄが残存していても仕上加工を要する程美観を損
なわない。 Next, the action will be explained. FIG. 8 shows the bearing bracket 2 cast using the mold shown in FIG. 7, but in reality, a flash 2d is formed on the stator side surface 2c when the molds are matched as shown in FIG. When this bearing bracket 2 is shot blasted to remove sand, the sharp angular part of the flash 2d disappears and the protrusion 1
Only a line remains on the top surface of 2. Therefore, the protrusion 1
1, the belt-shaped protrusion 12 is already formed on the outer circumference 2e of the bearing bracket 2, so the casting flash 2
Even if d remains, it does not impair the aesthetics to the extent that it requires finishing.
第１０図のように下型６と上型７の型合せに芯
ずれが生じた場合には、型合せした固定側の面２
ｃにおけるくい違い面は突部１２の面で生ずるた
めシヨツトブラスト等の砂落し仕上のみで鋭角な
鋳ばり２ｄはなくなり、わずかに残存した鋳ばり
２ｄも突部１２が当初より軸受ブラケツト２の外
周部２ｅに帯状に形成されているので鋳ばり仕上
を要する程美観は損なわれない。さらに鋳ばり２
ｄが極端に大きく形成されてしまつた場合や型の
くい違い面が大きい場合に固定側の面２ｃのグラ
インダー仕上の必要性が生じた場合も突部の部分
を削ればよいのでグラインダー仕上跡を外周部２
ｅに残らないように容易にグラインダー仕上がで
き美観を損なわない。 If misalignment occurs in the alignment of the lower die 6 and upper die 7 as shown in Fig. 10, the fixed side surface 2
Since the discrepancy surface at c occurs on the surface of the protrusion 12, the sharp flash 2d is eliminated by sand-removal finishing such as shot blasting. Since it is formed in a band shape on the outer peripheral portion 2e, the appearance is not impaired to the extent that a cast flash finish is required. More cast burrs 2
If it is necessary to grind the fixed side surface 2c if d is formed extremely large or the gap between the mold surfaces is large, you can simply grind off the protruding part, so there will be no trace of the grinder finish. Outer periphery 2
It can be easily finished with a grinder so that no residue remains on the surface, and the aesthetic appearance is not compromised.
また第１１図はせき９ａの部分であつて、鋳型
より取出した軸受ブラケツト２から湯口９を切断
する場合には矢印方向にハンマ等で湯口９をたた
くと、第１２図のようにせき９ａの部分は湯口９
側に付着して折損する。従つてせき９ａの部分は
角部に切欠きが生ずるのみで鋳ばり仕上は不要で
ある。 FIG. 11 shows the weir 9a, and when cutting the sprue 9 from the bearing bracket 2 taken out from the mold, by hitting the sprue 9 with a hammer or the like in the direction of the arrow, the weir 9a will open as shown in FIG. Part is sprue 9
It sticks to the side and breaks. Therefore, in the weir 9a, only a notch is formed at the corner, and flash finishing is not necessary.
第１３図は他の実施例であつて、突部１２の形
状を型合せ面８に沿つて突部１２の高さｈより小
さい段差ｅの段差部１２ａを設けたものである。
段差ｅは突部１２の高さｈの約1/2の関係にあり、
上型７と下型６との型合せに±ｅの芯ずれが生じ
ても鋳ばり２ｄは同じ位置に同じ程度発生するの
でばり除去作業のシヨツトブラスト等がかりやす
くなる。 FIG. 13 shows another embodiment in which the shape of the protrusion 12 is such that a step portion 12a having a step e smaller than the height h of the protrusion 12 is provided along the mold matching surface 8.
The step e is approximately 1/2 the height h of the protrusion 12,
Even if there is a misalignment of ±e between the upper mold 7 and the lower mold 6, the flash 2d will be generated at the same position and to the same extent, making it easier to perform burr removal operations such as shot blasting.
第１４図は他の実施例であつて、突部１２を境
界としてブラケツトの内厚はいんろう部分２ａで
は肉厚t1、他は肉厚t2とすることにより、いんろ
う部２ａは機械加工のために余分な肉をつける
が、加工に関係しない部分の肉厚t2はt1より薄く
することができ、重量低減になる。 FIG. 14 shows another embodiment, in which the inner thickness of the bracket with the protrusion 12 as a boundary is set to thickness t 1 at the spigot part 2a and thickness t 2 at the other parts, so that the spigot part 2a can be machined. Extra meat is added for processing, but the wall thickness t 2 of parts not related to processing can be made thinner than t 1 , resulting in weight reduction.
以上のように本発明によれば、軸受ブラケツト
の鋳造方法において鋳型の上型と下型との型合せ
面における軸受ブラケツトの外周部に帯状の突部
を形成する凹部を設けると共に、湯口の型合せ面
に形成するせきを軸受ブラケツトの角部に切欠き
容易に設けるようにしたので、型合せ面の鋳ばり
加工仕上が不要となると共に、せきの部分の鋳ば
り仕上を廃止でき、美観を損わず、鋳物材料の生
産性を向上できるなどのすぐれた効果がある。
As described above, according to the present invention, in the method for casting a bearing bracket, a concave portion forming a band-shaped protrusion is provided on the outer periphery of the bearing bracket on the mating surface of the upper mold and the lower mold, and the mold of the sprue is Since the weir to be formed on the mating surface can be easily formed by notching the corner of the bearing bracket, it is not necessary to finish the mold mating surface with flash, and the weir can be finished with flash, improving the aesthetic appearance. It has excellent effects such as improving the productivity of casting materials without causing any damage.
第１図は一般の全閉外扇形回転電機を示す縦断
面図、第２図は第１図の軸受ブラケツトを示す正
面図、第３図は第２図のＡ−Ａ線に沿う縦断面
図、第４図は従来の軸受ブラケツトの鋳造方法に
用いる鋳型を示す縦断面錘、第５図および第６図
はそれぞれ第４図を用いた軸受ブラケツトを示す
縦断面図、第７図は本発明の軸受ブラケツトの鋳
造方法に用いる鋳型の一実施例を示す縦断面図、
第８図、第９図および第１０図はそれぞれ第７図
を用いた軸受ブラケツトを示す縦断面図、第１１
図はせき付近を示す縦断面図、第１２図はせきの
折損状態を示す縦断面図、第１３図および第１４
図はそれぞれ他の実施例の軸受ブラケツトを示す
縦断面図である。
２……軸受ブラケツト、２ａ……いんろう部、
２ｂ……取付座、２ｃ……固定子側の面、２ｅ…
…外周部、６……下型、７……上型、８……型合
せ面、９……湯口、９ａ……せき、１１……凹
部、１２……突部。
FIG. 1 is a vertical cross-sectional view showing a general totally enclosed external fan-shaped rotating electric machine, FIG. 2 is a front view showing the bearing bracket of FIG. 1, and FIG. 3 is a vertical cross-sectional view taken along line A-A in FIG. FIG. 4 is a vertical cross-sectional view showing a mold used in a conventional bearing bracket casting method, FIGS. 5 and 6 are vertical cross-sectional views showing a bearing bracket using the method shown in FIG. 4, and FIG. A vertical cross-sectional view showing an example of a mold used in a method for casting a bearing bracket,
8, 9, and 10 are longitudinal sectional views showing the bearing bracket using FIG. 7, and FIG. 11, respectively.
The figure is a longitudinal sectional view showing the weir area, Fig. 12 is a longitudinal sectional view showing the broken state of the weir, Figs. 13 and 14.
The figures are longitudinal sectional views showing bearing brackets of other embodiments. 2... Bearing bracket, 2a... Inner fitting part,
2b...Mounting seat, 2c...Stator side surface, 2e...
...Outer circumference, 6...Lower mold, 7...Upper mold, 8...Mold matching surface, 9...Gate, 9a...Weir, 11...Recess, 12...Protrusion.
Claims (1)
型と下型との型合せ面における前記軸受ブラケツ
トの外周部に帯状の突部を形成する凹部を設ける
と共に、湯口の前記型合せ面に形成するせきを前
記軸受ブラケツトの角部に切欠き容易に設けるこ
とを特徴とする軸受ブラケツトの鋳造方法。1. In a mold for casting a bearing bracket, a concave portion forming a band-shaped protrusion is provided on the outer periphery of the bearing bracket on the mating surface of the upper mold and the lower mold, and a weir is formed on the mold mating surface of the sprue. A method for casting a bearing bracket, characterized in that a notch is easily provided at a corner of the bearing bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9612082A JPS58215265A (en) | 1982-06-07 | 1982-06-07 | Casting method of bearing bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9612082A JPS58215265A (en) | 1982-06-07 | 1982-06-07 | Casting method of bearing bracket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58215265A JPS58215265A (en) | 1983-12-14 |
| JPS644871B2 true JPS644871B2 (en) | 1989-01-27 |
Family
ID=14156517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9612082A Granted JPS58215265A (en) | 1982-06-07 | 1982-06-07 | Casting method of bearing bracket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58215265A (en) |
-
1982
- 1982-06-07 JP JP9612082A patent/JPS58215265A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58215265A (en) | 1983-12-14 |
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