JPS6325865B2 - - Google Patents
Info
- Publication number
- JPS6325865B2 JPS6325865B2 JP11126082A JP11126082A JPS6325865B2 JP S6325865 B2 JPS6325865 B2 JP S6325865B2 JP 11126082 A JP11126082 A JP 11126082A JP 11126082 A JP11126082 A JP 11126082A JP S6325865 B2 JPS6325865 B2 JP S6325865B2
- Authority
- JP
- Japan
- Prior art keywords
- metal seal
- mold
- main mold
- metal
- main
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 64
- 239000002184 metal Substances 0.000 claims description 64
- 238000000034 method Methods 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 6
- 238000009750 centrifugal casting Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 230000008602 contraction Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/04—Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、キヤタピラーの回転部分に使用す
る外周上縁部にくびれ部を有する金属シールの遠
心鋳造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for centrifugal casting of a metal seal having a constricted portion at the upper edge of the outer periphery for use in a rotating portion of a caterpillar.
従来の技術および、その問題点
従来、このようなくびれ部を有する金属シール
の製造方法としては以下のようなものがある。BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, there are the following methods of manufacturing a metal seal having such a constricted portion.
すなわち、第４図に示すように金属シールのく
びれ部を形成するための砂型Ｂを外方に配し、金
属シールの内周面を形成するための砂製丸中子Ｃ
を内方に位置させて組み立てた鋳型内に金属溶湯
を注湯する方法がある。 That is, as shown in Fig. 4, a sand mold B for forming the constriction of the metal seal is placed outward, and a sand mold C for forming the inner peripheral surface of the metal seal is placed.
There is a method in which molten metal is poured into a mold that is assembled by positioning it inside.
しかし、この方法によれば砂製丸中子Ｃおよび
砂型Ｂが、ともに砂製である関係上、一回の鋳造
で使用不能となる。 However, according to this method, since both the sand round core C and the sand mold B are made of sand, they become unusable after one casting.
このことは不経済であるとともに、砂処理、造
型、鋳仕上の各作業工程が必要となつて、非能率
でもあり、また公害問題の発生原因ともなつてい
る。 This is not only uneconomical, but also inefficient as it requires various work steps such as sand treatment, molding, and casting finishing, and is also a cause of pollution problems.
さらに、回転部に使用される金属シールは所定
の精度を要求される関係上、一般の砂型材では表
面粗度が大きいので高価なシエルモード砂型を使
用している。 Further, since the metal seal used in the rotating part is required to have a certain level of accuracy, an expensive shell mode sand mold is used because the surface roughness of general sand mold material is large.
このため、上記欠点による損失は重要な問題で
ある。 Therefore, losses due to the above-mentioned drawbacks are an important problem.
第２の製造方法として、まず、くびれ部のない
略円筒状の鋳型基材を製造し、その後、たん造等
の熱処理を施し、仕上工程において機械加工を加
えてくびれ部を形成し金属シールを得る方法があ
る。 In the second manufacturing method, first, a substantially cylindrical mold base material without a constriction is manufactured, then heat treatment such as tanzo is applied, and in the finishing process, machining is added to form a constriction and a metal seal is formed. There is a way to get it.
この方法においては、金属シールの材質が特殊
鋳鉄（炭素含有量が大きい）等の耐摩耗材料であ
るため、鋳放し表面強度がHRC60前後と非常に
硬いので加工費の点で不利である。 In this method, since the metal seal is made of a wear-resistant material such as special cast iron (with a high carbon content), the as-cast surface strength is extremely hard with around HRC60, which is disadvantageous in terms of processing costs.
そこで、この発明は上記の種々の不具合を鑑み
て提案されたものであり、遠心力と温度差による
金属収縮を利用することにより、高品質で、しか
も安価な金属シールを提供できるキヤタピラーの
回転部分に使用する外周上縁部にくびれ部を有す
る金属シールの遠心鋳造方法を提供したものであ
る。 Therefore, this invention was proposed in view of the above-mentioned various problems, and it is a rotating part of a caterpillar that can provide a high quality and inexpensive metal seal by utilizing metal contraction due to centrifugal force and temperature difference. The present invention provides a method for centrifugally casting a metal seal having a constricted portion on the upper edge of the outer periphery for use in the present invention.
問題点を解決するための手段
すなわち、この発明による金属シールの遠心鋳
造方法は、実施例に対応する第１〜２図に示すよ
うに、金属シール２の外周上縁部にあるくびれ部
を成型するための主型１を下型８とともに所定速
度で回転せしめ、その主型１の上方中央部に設け
た表面孔４から金属溶湯を所定量だけ注湯して金
属シール２を成型した後、金属シール２を主型１
及び下型８と共に温度降下させて、金属シール２
と主型１との収縮率の相違により金属シール２の
くびれ部と主型１との係合を解除せしめ、次いで
主型１と下型８とを分離させて、主型１の下方か
ら金属シール２を抜き出すことを特徴とするキヤ
タピラーの回転部分に使用する外周上縁部にくび
れ部を有する金属シールの遠心鋳造方法である。Means for Solving the Problems That is, the method for centrifugal casting of a metal seal according to the present invention, as shown in FIGS. After rotating the main mold 1 together with the lower mold 8 at a predetermined speed and pouring a predetermined amount of molten metal from the surface hole 4 provided in the upper center of the main mold 1 to form the metal seal 2, Metal seal 2 to main mold 1
The temperature is lowered together with the lower die 8 and the metal seal 2
Due to the difference in shrinkage rate between the metal seal 2 and the main mold 1, the engagement between the constriction of the metal seal 2 and the main mold 1 is released, the main mold 1 and the lower mold 8 are separated, and the metal seal is removed from below the main mold 1. This is a centrifugal casting method for a metal seal having a constricted portion at the upper edge of the outer periphery for use in a rotating part of a caterpillar, which is characterized in that the seal 2 is extracted.
実施例
以下、この発明の実施例を図面に基いて説明す
る。Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings.
第１図は、この発明に係るくびれ部を有する金
属シールの遠心鋳造方法を示し、主型１は、金属
シール２の外周面と上面とを形成し得る成型部を
内周面に形成され、かつ、上面中央部に金属シー
ル２の内径より小さい表面孔４を有するものであ
り、一体状に加工されている。 FIG. 1 shows a method for centrifugal casting of a metal seal having a constricted portion according to the present invention, in which a main mold 1 has a molded portion formed on its inner peripheral surface that can form the outer peripheral surface and the upper surface of a metal seal 2; Moreover, it has a surface hole 4 smaller than the inner diameter of the metal seal 2 at the center of the upper surface, and is machined in one piece.
そして、金属シール２の外周面を成型する主型
１の内周面３には金属シール２のくびれ部に合せ
て凹凸を設けてある。 The inner circumferential surface 3 of the main die 1 for molding the outer circumferential surface of the metal seal 2 is provided with irregularities in accordance with the constricted portion of the metal seal 2.
この凹凸の量は、主型１から金属シール２を型
抜きする際、温度降下により収縮した金属シール
２がくびれ部５で係止されることなく取り出せる
ように設定してある。 The amount of this unevenness is set so that when the metal seal 2 is cut out from the main mold 1, the metal seal 2, which has contracted due to a temperature drop, can be taken out without being stopped by the constriction part 5.
この実施例における金属シール２は外表面が略
円錐形状であり、上下端に突起縁６，７を有する
ものである。 The metal seal 2 in this embodiment has a substantially conical outer surface and has protruding edges 6 and 7 at the upper and lower ends.
また、主型１の成型部は金属シール２を抜き出
し易いように小径端側を上方へ配した形状にして
ある。 Further, the molded portion of the main mold 1 is shaped such that the small diameter end side is placed upward so that the metal seal 2 can be easily extracted.
この場合、金属シール２のくびれ部５と称する
個所は型抜時に係止する部分であり、上端の突起
縁６と、その下方に連なる谷部のことである。 In this case, the constricted portion 5 of the metal seal 2 is a portion that is engaged during mold removal, and refers to a protruding edge 6 at the upper end and a valley extending below the protruding edge 6.
つまり、第２図に示すように、凸部である突起
縁６と凹部である谷部とを成型する主型１側の半
径方向の差（ａ＋ｂ）が、その部分における金属
シール２の温度降下による収縮率（ｄ＋ｅ）より
小さい値となるように設定されている。 In other words, as shown in FIG. 2, the difference (a+b) in the radial direction of the main mold 1 for molding the protrusion edge 6, which is a convex part, and the valley part, which is a concave part, is the temperature drop of the metal seal 2 at that part. The shrinkage rate is set to be smaller than the shrinkage rate (d+e).
したがつて、鋳造後、所定時間を経過し適度に
温度降下した金属シールは主型１から下方へ容易
に型抜き可能となる。 Therefore, after a predetermined period of time has elapsed after casting, the metal seal whose temperature has appropriately decreased can be easily demolded downward from the main mold 1.
なお、この実施例では、単一の凹凸部を有する
金属シール２を示したが、この発明は複数のくび
れ部を有する金属シールであつても差支えなく、
また、類似形状の鋳造物に対しても応用できるも
のである。 Although this embodiment shows the metal seal 2 having a single concave and convex portion, the present invention may also be applied to a metal seal having a plurality of constrictions.
It can also be applied to cast products of similar shapes.
下型８は金属シール２の下面を形成すると同時
に主型１の底部をなすものでる。 The lower mold 8 forms the lower surface of the metal seal 2 and at the same time forms the bottom of the main mold 1.
また、下型８の上方へは主型１を載置して、金
属シール２の鋳型９を構成し、下型８と主型１と
を係止する。 Further, the main mold 1 is placed above the lower mold 8 to form a mold 9 of the metal seal 2, and the lower mold 8 and the main mold 1 are locked together.
上記主型１や下型８に使用する材料は耐熱材
（鋼材、セラミツク）が良いのはいうまでもない。 It goes without saying that the materials used for the main mold 1 and the lower mold 8 are preferably heat-resistant materials (steel, ceramic).
１１は回転板１０を駆動するモーター、１２は
注湯に使用する柄杓を示す。 Reference numeral 11 indicates a motor that drives the rotary plate 10, and reference numeral 12 indicates a ladle used for pouring.
以下、これらについて、さらに詳細に説明す
る。 These will be explained in more detail below.
先ず、駆動モーター１１を始動させると回転板
１０上の鋳型９が回転を始めるが、その時点で主
型１の表面孔４から黒鉛製の柄杓により金属湯を
下型８上に注湯する。 First, when the drive motor 11 is started, the mold 9 on the rotary plate 10 begins to rotate, and at that point, metal hot water is poured onto the lower mold 8 from the surface hole 4 of the main mold 1 using a graphite ladle.
金属溶湯としては、一般に高クローム材料、高
ニツケル材料、耐摩耗性特殊鋳鉄材などが使用さ
れる。 As the molten metal, high chromium materials, high nickel materials, special wear-resistant cast iron materials, etc. are generally used.
注入された溶湯は回転する鋳型９内で遠心力を
与えられ、主型１の内壁の成型部に跳ばされて圧
着し、金属シール２の形状に成型されるのであ
る。 The injected molten metal is subjected to centrifugal force within the rotating mold 9, and is thrown onto the molded part of the inner wall of the main mold 1 and is pressed into contact with it, thereby being molded into the shape of the metal seal 2.
そして、同時に冷却されて硬化収縮を始める
が、その収縮は金属シール２の中心方向に向つて
直径の縮小の形で起こる収縮となるのである。 At the same time, it is cooled and begins to harden and shrink, but this shrinkage occurs in the form of a reduction in diameter toward the center of the metal seal 2.
第１図は注湯された直後の状態を示し、第２図
においては収縮が完了した状態を示しているが、
収縮完了の時点では図示するように、金属シール
２の外周部が主型１の成型部の内壁から離れて、
その部分に金属シール２の中心方向への収縮寸法
に等しい間隙部ｄが生じることになるのである。 Figure 1 shows the state immediately after pouring, and Figure 2 shows the state after the contraction has been completed.
When the contraction is completed, as shown in the figure, the outer peripheral part of the metal seal 2 is separated from the inner wall of the molding part of the main mold 1,
A gap d equal to the contraction dimension of the metal seal 2 toward the center is created at that portion.
この場合、金属シール２のくびれ部５を成型す
る主型１の、その部分の凸設部(f)の直径を、収縮
完了後の金属シール２の、このくびれ部５を形成
する上段の突起縁６の直径よりも大となるように
設定することにより、第３図に示すように収縮完
了した金属シール２を下型８の開放により図にお
いて下方へ主型１から取り出すことが可能になる
のである。 In this case, the diameter of the convex part (f) of the main mold 1 that molds the constricted part 5 of the metal seal 2 is the diameter of the upper protrusion that forms the constricted part 5 of the metal seal 2 after the contraction is completed. By setting the diameter to be larger than the diameter of the edge 6, it becomes possible to take out the deflated metal seal 2 from the main mold 1 downward in the figure by opening the lower mold 8, as shown in FIG. It is.
発明の効果
この発明によれば、主型を従来のように型割す
ることなく金属シールの型抜きが可能となり、こ
れにより、従来の型割作業が不要となり、その労
力が大幅に軽減されるとともに、型抜き作業を一
層迅速化して金属シールの鋳造時間を大幅に短縮
させることができ、また遠心力により金属シール
が成型されるので、鋳肌も形状も奇麗になつて、
ほとんど仕上加工を要しない最終製品としての金
属シールを得られることとなり、その結果従来に
増して高品質で安価な金属シールを市場に提供す
ることができる利点がある。Effects of the Invention According to this invention, it is possible to cut out the metal seal without cutting the main mold as in the conventional method, thereby eliminating the need for the conventional cutting work and greatly reducing the labor involved. At the same time, it is possible to speed up the die-cutting process and significantly shorten the casting time for metal seals.Also, since the metal seals are formed by centrifugal force, the casting surface and shape are beautiful.
It is possible to obtain a metal seal as a final product that requires almost no finishing work, and as a result, there is an advantage that higher quality and cheaper metal seals can be provided to the market than ever before.
これに加えて、注湯、主型の開放、金属シール
の型抜き等の一連の作業内容が単純化されるた
め、連続的な大量生産システムを実現できる利点
もある。 In addition, since a series of operations such as pouring metal, opening the main mold, and cutting out the metal seal are simplified, there is also the advantage that a continuous mass production system can be realized.
第１図は、この発明の一実施例を示す要部縦断
面図、第２図は鋳型内で金属シールが収縮完了し
た状態を示す縦断面図、第３図は鋳型開放時の説
明図、第４図は従来の鋳型の説明図である。
符号、１……主型、２……金属シール、３……
内周面、４……表面孔、５……くびれ部、８……
下型、９……鋳型、１０……回転板。
FIG. 1 is a vertical cross-sectional view of a main part showing an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view showing a state in which the metal seal has completely contracted within the mold, and FIG. 3 is an explanatory diagram when the mold is opened. FIG. 4 is an explanatory diagram of a conventional mold. Code, 1...Main mold, 2...Metal seal, 3...
Inner peripheral surface, 4... surface hole, 5... constriction, 8...
Lower mold, 9... Mold, 10... Rotating plate.
Claims (1)
成型するための主型１を下型８とともに所定速度
で回転せしめ、その主型１の上方中央部に設けた
表面孔４から金属溶湯を所定量だけ注湯して金属
シール２を成型した後、金属シール２を主型１及
び下型８と共に温度降下させて、金属シール２と
主型１との収縮率の相違により金属シール２のく
びれ部と主型１との係合を解除せしめ、次いで主
型１と下型８とを分離させて、主型１から金属シ
ール２を抜き出すことを特徴とするキヤタピラー
の回転部分に使用する外周上縁部にくびれ部を有
する金属シールの遠心鋳造方法。1. The main mold 1 for molding the constriction on the upper edge of the outer periphery of the metal seal 2 is rotated together with the lower mold 8 at a predetermined speed, and the molten metal is poured through the surface hole 4 provided in the upper center of the main mold 1. After pouring a predetermined amount of metal and molding the metal seal 2, the temperature of the metal seal 2 is lowered together with the main mold 1 and the lower mold 8, and due to the difference in shrinkage rate between the metal seal 2 and the main mold 1, the temperature of the metal seal 2 is reduced. An outer periphery used for a rotating part of a caterpillar, characterized in that the engagement between the constriction part and the main mold 1 is released, the main mold 1 and the lower mold 8 are separated, and the metal seal 2 is extracted from the main mold 1. A method for centrifugal casting of a metal seal having a constriction on the upper edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11126082A JPS59137160A (en) | 1982-06-27 | 1982-06-27 | Production of metallic seal utilizing metal shrinkage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11126082A JPS59137160A (en) | 1982-06-27 | 1982-06-27 | Production of metallic seal utilizing metal shrinkage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59137160A JPS59137160A (en) | 1984-08-07 |
| JPS6325865B2 true JPS6325865B2 (en) | 1988-05-27 |
Family
ID=14556682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11126082A Granted JPS59137160A (en) | 1982-06-27 | 1982-06-27 | Production of metallic seal utilizing metal shrinkage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59137160A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4828175B2 (en) * | 2005-08-03 | 2011-11-30 | 株式会社岡村製作所 | Goods storage fixtures |
-
1982
- 1982-06-27 JP JP11126082A patent/JPS59137160A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59137160A (en) | 1984-08-07 |
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