JPH0132281B2 - - Google Patents
Info
- Publication number
- JPH0132281B2 JPH0132281B2 JP18375785A JP18375785A JPH0132281B2 JP H0132281 B2 JPH0132281 B2 JP H0132281B2 JP 18375785 A JP18375785 A JP 18375785A JP 18375785 A JP18375785 A JP 18375785A JP H0132281 B2 JPH0132281 B2 JP H0132281B2
- Authority
- JP
- Japan
- Prior art keywords
- billet
- powder material
- powder
- filled
- tubular
- 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
- 239000000843 powder Substances 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 22
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 2
- 238000007872 degassing Methods 0.000 claims 2
- 239000000919 ceramic Substances 0.000 claims 1
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000002775 capsule Substances 0.000 description 9
- 238000009694 cold isostatic pressing Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 3
- 238000001192 hot extrusion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Extrusion Of Metal (AREA)
- Powder Metallurgy (AREA)
Description
【発明の詳細な説明】
＜産業上の利用分野＞
この発明は、熱間押出プレスによる管の製造に
用いる粉末充填ビレツトの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for manufacturing a powder-filled billet used for manufacturing tubes by hot extrusion pressing.
＜従来の技術＞
従来のこの種のビレツトの製造方法としては、
粉末をゴム容器に入れて冷間静水圧で管状に成形
した後に、これを管状カプセルに入れてビレツト
とすることが周知である。ところが、この方法に
よつて作られたビレツトは粉末材料成形体がカプ
セル内面に密着し難いので、そのままでは熱間押
出プレスにより加工する前の誘導加熱が均一に行
われない問題がある。また、粉末の種類によつて
は冷間静水圧プレス後に成形体をゴム容器から取
出すと崩壊する問題もある。これらの問題を解決
できる方法としては、特殊形状のカプセルに粉末
を充填して冷間静水圧プレスする方法が、特公昭
57−17042号公報に開示されている。<Conventional technology> The conventional method for manufacturing this type of billet is as follows:
It is well known to place a powder in a rubber container and form it into a tube under cold isostatic pressure, which is then placed in a tubular capsule to form a billet. However, in billets made by this method, it is difficult for the molded powder material to adhere tightly to the inner surface of the capsule, so there is a problem that induction heating is not uniformly performed before processing by hot extrusion press. Furthermore, depending on the type of powder, there is also the problem that the molded body collapses when taken out from the rubber container after cold isostatic pressing. A method that can solve these problems is to fill specially shaped capsules with powder and perform cold isostatic pressing.
It is disclosed in Publication No. 57-17042.
＜発明が解決しようとする問題点＞
従来の特殊形状のカプセルを用いる方法には、
冷圧静水圧プレス時のカプセルの形状変化、特に
両端部近傍の変形を予測してカプセル設計をしな
ければならない問題があつた。<Problems to be solved by the invention> The conventional method using specially shaped capsules has the following problems:
There was a problem in which the capsule had to be designed by predicting the shape change of the capsule during cold isostatic pressing, especially the deformation near both ends.
＜問題を解決するための手段＞
この発明による手段は、同軸の円筒形内周壁及
び円筒形外周壁並びにその内外の周壁間に対する
底壁及び蓋で構成されるゴム又はゴム様材料製の
密封性容器を用い、その容器内に上記内周壁及び
外周壁に沿つて夫々薄肉金属円筒を配置し、その
双方の薄肉金属円筒間にビレツト用粉末材料をそ
のまま又はビレツト用粉末材料が圧縮により円筒
形に予備成形されたものを装填して容器を密封状
態とし、その密封容器を冷間静水圧プレスにより
加圧して上記薄肉金属円筒及び粉末材料を一体化
した管状体とし、その管状体を上記容器から取出
してその管状体両端で内外の薄肉金属円筒間を封
鎖するように金属板を溶接することを特徴とする
方法である。<Means for solving the problem> The means according to the invention provides a seal made of rubber or rubber-like material, consisting of a coaxial cylindrical inner circumferential wall and a cylindrical outer circumferential wall, and a bottom wall and a lid between the inner and outer circumferential walls. A container is used, and thin metal cylinders are placed inside the container along the inner peripheral wall and the outer peripheral wall, respectively, and the billet powder material is placed between the two thin metal cylinders as it is or the billet powder material is compressed into a cylindrical shape. The preformed material is loaded and the container is sealed, and the sealed container is pressurized by a cold isostatic press to form a tubular body that integrates the thin metal cylinder and the powder material, and the tubular body is removed from the container. This method is characterized by taking out the tubular body and welding a metal plate at both ends of the tubular body so as to seal the space between the inner and outer thin metal cylinders.
＜作用＞
上記手段によれば、ゴム又はゴム様材料製の容
器内に内周壁及び外周壁に沿つて夫々薄肉金属円
筒を配置し、ビレツト用粉末材料をそのまま又は
円筒形に予備成形したものを装填して、冷間静水
圧プレスにより加圧するから、全体が略均等に縮
小する。すなわち、無加圧状態の容器内管状空間
が等方向に縮小された管状体が得られる。管状体
の段階で内外面の薄肉金属円筒は粉末部分に密着
してこれを包持しており、粉体部分の崩壊はな
い。この方法によつて得られた管状ビレツトは、
冷間静水圧前の粉末材料の部分的なわずかな密度
差により表面に若干のうねりが生じることもある
が、粉体材料と内外周面の薄肉金属円筒とは密着
しており、誘導加熱においてまた熱間押出形成に
おいても支障はない。<Function> According to the above means, thin metal cylinders are arranged along the inner and outer peripheral walls in a container made of rubber or rubber-like material, and the billet powder material is used as it is or preformed into a cylindrical shape. Since it is loaded and pressurized using a cold isostatic press, the entire product is shrunk almost uniformly. That is, a tubular body is obtained in which the tubular space inside the container in a non-pressurized state is reduced in the same direction. At the stage of the tubular body, the thin-walled metal cylinders on the inner and outer surfaces adhere to and enclose the powder portion, and the powder portion does not collapse. The tubular billet obtained by this method is
Although slight undulations may occur on the surface due to slight local density differences in the powder material before cold isostatic pressure, the powder material and the thin metal cylinder on the inner and outer surfaces are in close contact, and induction heating There is also no problem in hot extrusion formation.
＜実施例＞
第１図は１実施例の冷間静水圧プレス前の状態
を示し、ゴム製容器１に薄肉金属円筒２，３及び
粉末材料４を充填した状態である。容器１は内周
壁５、外周壁６、底壁７、蓋８からなり、材質は
クロロプレンゴムである。粉末材料４は100メツ
シユ以下のガスアトマイズ粉末である。<Example> FIG. 1 shows the state of an example before cold isostatic pressing, in which a rubber container 1 is filled with thin metal cylinders 2, 3 and a powder material 4. The container 1 consists of an inner circumferential wall 5, an outer circumferential wall 6, a bottom wall 7, and a lid 8, and is made of chloroprene rubber. Powder material 4 is a gas atomized powder of 100 mesh or less.
第１図のように内部に材料を収容して脱気する
ことなく密封した容器を冷間静水圧プレスにより
4t／cm2の圧力で加圧してから、内部の管状成形体
９を取出し、その両端に環状金属円板１０，１０
を溶接して第２図に示すビレツト１１とした。 As shown in Figure 1, a container containing the material inside and sealed without being degassed is pressed using cold isostatic pressure.
After pressurizing with a pressure of 4t/cm 2 , the inner tubular molded body 9 is taken out, and annular metal discs 10, 10 are attached to both ends of the tubular molded body 9.
were welded to form a billet 11 shown in FIG.
なお、管状成形体の粉末の充填密度は元の65％
から82％に上昇していた。 The packing density of the powder in the tubular compact is 65% of the original.
This had increased from 82% to 82%.
上記実施例において、使用した環状金属円板
９，１０は単なる板であるが、必要に応じてビレ
ツト１１の内部を脱気して封止するための脱気孔
を有するものを用いる。 In the above embodiment, the annular metal discs 9 and 10 used are simple plates, but those having deaeration holes for deaerating and sealing the inside of the billet 11 are used as required.
＜発明の効果＞
この発明によれば、薄肉金属円筒及び粉末材料
の圧縮成形時に両端部の変形を阻害する剛性の大
きいものを用いないため、全体が略均一に縮小さ
れて管状を維持するものであるから、従来のカプ
セルを用いる方法におけるように冷間静水圧プレ
ス時のカプセルの両端部近傍の変形を予測した特
殊形状のカプセルとする必要がない。従つて、粉
末充填管状ビレツトの製造がきわめて容易とな
り、コスト低減効果がきわめて大きい。<Effects of the Invention> According to the present invention, during compression molding of a thin-walled metal cylinder and powder material, a material with high rigidity that inhibits deformation of both ends is not used, so that the entire cylinder is reduced substantially uniformly and maintains a tubular shape. Therefore, there is no need to create a capsule with a special shape that anticipates deformation near both ends of the capsule during cold isostatic pressing, unlike in conventional methods using capsules. Therefore, manufacturing of the powder-filled tubular billet becomes extremely easy, and the cost reduction effect is extremely large.
第１図はこの発明の１実施例を説明するための
容器内にビレツト材料粉末を充填した状態の縦断
面図、第２図は同実施例の方法で得られたビレツ
トの縦断面略図である。
１……容器、２，３……薄肉金属円筒、４……
ビレツト材料粉末、５……容器内周壁、６……容
器外周壁、７……容器底壁、８……容器蓋、９…
…成形体、１０……金属板、１１……ビレツト。
Fig. 1 is a longitudinal sectional view of a container filled with billet material powder for explaining one embodiment of the present invention, and Fig. 2 is a schematic longitudinal sectional view of a billet obtained by the method of the same embodiment. . 1... Container, 2, 3... Thin metal cylinder, 4...
Billet material powder, 5... Container inner circumferential wall, 6... Container outer circumferential wall, 7... Container bottom wall, 8... Container lid, 9...
... Molded object, 10 ... Metal plate, 11 ... Billet.
Claims (1)
その内外の周壁間に対する底壁及び蓋で構成され
るゴム又はゴム様材料製の密封性容器を用い、そ
の容器内に上記内周壁及び外周壁に沿つて夫々薄
肉金属円筒を配置し、その双方の薄肉金属円筒間
にビレツト用粉末材料をそのまま又はビレツト用
粉末材料が圧縮により円筒形に予備成形されたも
のを充填して容器を密封状態とし、その密封容器
を冷間静水圧プレスにより加圧して上記薄肉金属
円筒及び粉末材料を一体化した管状体とし、その
管状体を上記容器から取出してその管状体両端で
内外の薄肉金属円筒間を封鎖するように金属板を
溶接することを特徴とする粉末材料充填管状ビレ
ツトの製造方法。 ２ 特許請求の範囲１に記載のビレツト用粉末材
料が金属粉末である粉末材料充填管状ビレツトの
製造方法。 ３ 特許請求の範囲１に記載のビレツト用粉末材
料が金属粉末とセラミツク粉末との混合物である
粉末材料充填管状ビレツトの製造方法。 ４ 特許請求の範囲１に記載の金属板の少なくと
も一方が脱気後封止される脱気孔を有している粉
末材料充填管状ビレツトの製造方法。[Scope of Claims] 1. A hermetic container made of rubber or rubber-like material is used, which is composed of a coaxial cylindrical inner circumferential wall, a cylindrical outer circumferential wall, and a bottom wall and a lid between the inner and outer circumferential walls. Thin metal cylinders are arranged along the inner and outer peripheral walls, respectively, and the space between the two thin metal cylinders is filled with billet powder material as it is or with billet powder material preformed into a cylindrical shape by compression. The container is sealed, and the sealed container is pressurized using a cold isostatic press to form a tubular body that integrates the thin metal cylinder and the powder material. A method for manufacturing a powder material-filled tubular billet, characterized by welding a metal plate to seal the space between thin-walled metal cylinders. 2. A method for producing a tubular billet filled with powder material, wherein the billet powder material according to claim 1 is a metal powder. 3. A method for producing a tubular billet filled with powder material, wherein the powder material for billet according to claim 1 is a mixture of metal powder and ceramic powder. 4. A method for producing a tubular billet filled with powder material, wherein at least one of the metal plates according to claim 1 has a degassing hole that is sealed after degassing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18375785A JPS6244504A (en) | 1985-08-20 | 1985-08-20 | Production of powder material-packed tubular billet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18375785A JPS6244504A (en) | 1985-08-20 | 1985-08-20 | Production of powder material-packed tubular billet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6244504A JPS6244504A (en) | 1987-02-26 |
| JPH0132281B2 true JPH0132281B2 (en) | 1989-06-30 |
Family
ID=16141444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18375785A Granted JPS6244504A (en) | 1985-08-20 | 1985-08-20 | Production of powder material-packed tubular billet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6244504A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62230903A (en) * | 1986-03-31 | 1987-10-09 | Sanyo Tokushu Seiko Kk | Production of tubular billet packed with powder material |
-
1985
- 1985-08-20 JP JP18375785A patent/JPS6244504A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6244504A (en) | 1987-02-26 |
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