JPH0426709A - Method for working powder molding material - Google Patents
Method for working powder molding materialInfo
- Publication number
- JPH0426709A JPH0426709A JP13135390A JP13135390A JPH0426709A JP H0426709 A JPH0426709 A JP H0426709A JP 13135390 A JP13135390 A JP 13135390A JP 13135390 A JP13135390 A JP 13135390A JP H0426709 A JPH0426709 A JP H0426709A
- Authority
- JP
- Japan
- Prior art keywords
- round bar
- diameter cylindrical
- die
- plunger
- cylindrical part
- 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.)
- Granted
Links
- 239000000843 powder Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title description 5
- 239000012778 molding material Substances 0.000 title 1
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 230000001050 lubricating effect Effects 0.000 claims abstract description 26
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 56
- 238000003672 processing method Methods 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000005245 sintering Methods 0.000 abstract description 5
- 238000005482 strain hardening Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract 4
- 239000010409 thin film Substances 0.000 description 11
- 230000002706 hydrostatic effect Effects 0.000 description 7
- 239000011148 porous material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910003271 Ni-Fe Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、粉体を焼結してなる粉末成形材の加工方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for processing a powder molded material formed by sintering powder.
（従来の技術及びその課題〕
従来、粉末成形材である丸棒素材の縮径加工には、２頭
又は４頭のダイスを用いたスウエージング加工又は押切
りタップが一般的である。しかして、この加工方法をＹ
、 ３． １００ｋｇ／ｍｍ２程度の高強度素材に適
用する場合、加工荷重が大きいため、大がかりな専用機
が必要であり、大ががりな専用機を使用した場合でも高
い密度上昇が得られないという技術的課題がある。加え
て、間欠的な加工方法であるため、寸法精度の大幅な改
善は望めず、かつ、曲がりを生し易い。更に、このよう
な加工方法では、全体に圧縮力が作用せず、中心部に半
径方向の引張応力が作用するため、低延性で難加工性素
材の場合には、静水圧作用が得られないこととも相俟っ
て、加工中に半径方向に延在するいわゆるモミワレが中
心部に発生し易い。(Prior art and its problems) Conventionally, swaging processing or push-cut taps using two or four dies have been commonly used to reduce the diameter of round bar materials, which are powder molded materials. , this processing method is
, 3. When applied to high-strength materials of around 100 kg/mm2, the processing load is large, so a large-scale dedicated machine is required, and even with the use of a large-scale dedicated machine, a technical problem is that a high density increase cannot be achieved. There is. In addition, since it is an intermittent processing method, significant improvement in dimensional accuracy cannot be expected and bending is likely to occur. Furthermore, with this processing method, compressive force does not act on the entire material, but radial tensile stress acts on the center, so hydrostatic pressure cannot be obtained in the case of materials with low ductility and difficulty in processing. Coupled with this, so-called fir cracks extending in the radial direction are likely to occur in the center during processing.
これは、粉体を焼結した焼結体は、強度が高くもろいた
め、加工に際して割れを生じ易いことにも起因する。This is because a sintered body obtained by sintering powder has high strength and is brittle, and therefore easily cracks during processing.
本発明は、このような従来の技術的課題に鑑ノてなされ
たものであり、その構成は、一端から順次に、開口、大
径筒状部、次第に縮径するテーパ部及び他端が開口する
小径筒状部を形成するダイを用い、該ダイの大径筒状部
内に該大径筒状部よりも小径をなし、粉体を焼結した丸
棒素材を挿入し、該丸棒素材の周囲に潤滑液体を介在さ
せた状態で、該大径筒状部に液密なプランジャを摺動自
在に嵌挿し、該プランジャに一端側からの押圧力を作用
させて該丸棒素材をダイのテーパ部及び小径筒状部を順
次に通過させ、押出し加工によるひずみ硬化させる粉末
成形材の加工方法である。The present invention has been made in consideration of such conventional technical problems, and has a structure that includes an opening, a large-diameter cylindrical part, a tapered part whose diameter gradually decreases, and an open end at the other end. Using a die that forms a small diameter cylindrical part, a round bar material having a smaller diameter than the large diameter cylindrical part and made of sintered powder is inserted into the large diameter cylindrical part of the die. A liquid-tight plunger is slidably inserted into the large diameter cylindrical part with lubricating liquid interposed around it, and pressing force is applied to the plunger from one end to die the round bar material. This is a processing method for a powder molded material in which the material is passed sequentially through a tapered part and a small diameter cylindrical part, and strain hardened by extrusion processing.
この粉末成形材の加工方法は、比較的小さな押圧力で実
施することができ、ダイを通常のプレス装置のベツド上
に載置して使用される。This method of processing powder compacts can be carried out with a relatively small pressing force, and is used by placing the die on the bed of an ordinary press machine.
先ず、ダイの大径筒状部内に大径筒状部よりも小径をな
す丸棒素材を挿入セットし、潤滑液体を薄膜状に介在さ
せる。First, a round bar material having a smaller diameter than the large-diameter cylindrical portion is inserted and set into the large-diameter cylindrical portion of the die, and a lubricating liquid is interposed in the form of a thin film.
丸棒素材は、金属粉体を焼結した粉末成形材製であり、
高強度材料を使用できる。薄膜状の潤滑液体は、丸棒素
材の周囲、つまり外周及びプランジャとの間に形成する
。The round bar material is made of powder molded material made by sintering metal powder.
High strength materials can be used. A thin film of lubricating liquid is formed around the round bar material, that is, between the outer periphery and the plunger.
この大径筒状部にプレス装置のラムと一体のプランジャ
を液密かつ摺動自在に嵌挿する。A plunger integrated with the ram of the press device is fitted into this large-diameter cylindrical portion in a fluid-tight and slidable manner.
その後、プレス装置のラムを降下させ、押圧力をプラン
ジャ及び潤滑液体の薄膜を介して丸棒素材の一端に与え
る。これにより、非圧縮性の潤滑液体を薄膜状に周囲に
介在させた丸棒素材は、摩擦力を殆ど受けることなく下
降し、ダイのテーパ部によって縮径加工され、他端部が
ダイの小径筒状部の開口から次第に押出され、これによ
って押出加工によるひずみ硬化された製品が得られる。Thereafter, the ram of the press is lowered and a pressing force is applied to one end of the round bar stock through the plunger and a thin film of lubricating liquid. As a result, the round bar material with a thin film of incompressible lubricating liquid surrounding it descends with almost no frictional force, is reduced in diameter by the tapered part of the die, and the other end is reduced in diameter by the small diameter of the die. It is gradually extruded from the opening of the cylindrical part, thereby obtaining a strain-hardened product by extrusion processing.
その際、プランジャと丸棒素材の一端面との間に潤滑液
体を介在させることにより、大径筒状部及びテーパ部に
位置する丸棒素材は、プレス装置のラムからの加圧力を
プランジャから軸線方向に受けると共に潤滑液体による
静水圧作用を外周から受けて圧縮され、高密度化及び高
強度化が促される。At this time, by interposing a lubricating liquid between the plunger and one end surface of the round bar material, the round bar material located in the large diameter cylindrical part and the tapered part can absorb the pressing force from the ram of the press machine from the plunger. It is compressed by being subjected to the hydrostatic pressure action by the lubricating liquid from the outer periphery in the axial direction, thereby promoting high density and high strength.
更に、薄膜状に介在させた潤滑液体によって、丸棒素材
とダイ壁との間の摩擦力が極めて小さいものとなり、加
工中の丸棒素材の内部のひずみ分布の変動が小さくなる
。Furthermore, due to the lubricating liquid interposed in the form of a thin film, the frictional force between the round bar material and the die wall becomes extremely small, so that fluctuations in the strain distribution inside the round bar material during processing are reduced.
以下、本発明の実施例について図面を参照して説明する
。Embodiments of the present invention will be described below with reference to the drawings.
第１〜３図は、■実施例を示す。図中において符号１は
、コンテナを示し、内部には段面１ａを介して接続する
大径穴部１ｂ及び小径穴部ＩＣが中心軸線を合致させて
形成されている。このようなコンテナ１の大径穴部１ｂ
に、筒状をなすダイ２が焼ばめによって圧入嵌着され、
ダイ２の他端面が段面１ａに係止している。このダイ２
には、第２図に示すように中心軸線方向に貫通する空洞
部２ａが形成されている。空洞部２ａは、一端から順次
に、円形断面の開口２ｂ、大径筒状部２Ｃ１次第に縮径
するテーパ部２ｄ及び他端が開口する小径筒状部２ｅを
形成している。但し、小径筒状部２ｅよりもコンテナ１
の小径穴部ＩＣの方が大径をなし、コンテナ１の小径穴
部ＩＣによって小径筒状部２ｅ端部を閉塞しないように
なっている。Figures 1 to 3 show Example (1). In the figure, reference numeral 1 denotes a container, and inside thereof, a large diameter hole 1b and a small diameter hole IC, which are connected via a step surface 1a, are formed so that their central axes coincide with each other. Large diameter hole 1b of such container 1
A cylindrical die 2 is press-fitted by shrink fitting,
The other end surface of the die 2 is locked to the stepped surface 1a. This die 2
As shown in FIG. 2, a cavity 2a is formed therein, penetrating in the direction of the central axis. The hollow part 2a forms, sequentially from one end, an opening 2b with a circular cross section, a tapered part 2d whose diameter is gradually reduced from the large diameter cylindrical part 2C1, and a small diameter cylindrical part 2e whose other end is open. However, the container 1 is smaller than the small diameter cylindrical part 2e.
The small diameter hole IC has a larger diameter so that the end of the small diameter cylindrical part 2e is not blocked by the small diameter hole IC of the container 1.
このようにダイ２を収容したコンテナ１を、プレス装置
のベツド３上に一対のブロック状のスペーサ４を介在さ
せて載置する。The container 1 containing the die 2 in this manner is placed on the bed 3 of a press with a pair of block-shaped spacers 4 interposed therebetween.
次に、丸棒素材６の周囲に潤滑液体５を薄膜状に充満介
在させて、第３図に示すようにダイ２の空洞部２ａ内に
丸棒素材６を挿入セットする。この丸棒素材６は、金属
粉体を焼結した粉末成形材であり、通常、Ｙ、３． １
００ ｋｇ’／ｍｍ２程度の高強度材料（例えば、Ｗ
−Ｎｉ−Ｆｅ焼結合金）にて形成されている。すなわち
、丸棒素材６は、ダイ２の大径筒状部２Ｃよりも若干小
径をなして薄膜状の潤滑液体５の層を外周部に形成する
と共に、後記するプランジャ７との間に潤滑液体５の層
を形成する。潤滑液体５は、粘性の高いゾル状の油等で
ある。Next, a thin film of lubricating liquid 5 is filled around the round bar material 6, and the round bar material 6 is inserted and set into the cavity 2a of the die 2, as shown in FIG. This round bar material 6 is a powder molded material made by sintering metal powder, and is usually Y, 3. 1
00 kg'/mm2 high strength material (for example, W
-Ni-Fe sintered alloy). That is, the round bar material 6 has a slightly smaller diameter than the large-diameter cylindrical portion 2C of the die 2, and forms a thin film-like layer of lubricating liquid 5 on the outer periphery, and also has a lubricating liquid between it and a plunger 7, which will be described later. 5 layers are formed. The lubricating liquid 5 is a highly viscous sol-like oil or the like.
このようにダイ２の大径筒状部２Ｃと丸棒素材６との間
に潤滑液体５を薄膜状に充満させる方法としては、ダイ
２の小径筒状部２ｅを閉塞した状態で大径筒状部２ｃに
まで潤滑液体５を注ぎ込み、その後丸棒素材６を空洞部
２ａ内に挿入し、第３図に示すように丸棒素材６の他端
周縁をテーパ部２ｄに液密に突き当て、小径筒状部２ｅ
の閉塞状態を解除すればよい。In this way, a method of filling the space between the large diameter cylindrical part 2C of the die 2 and the round bar material 6 with the lubricating liquid 5 in a thin film form is to The lubricating liquid 5 is poured up to the shaped part 2c, and then the round bar material 6 is inserted into the hollow part 2a, and the other end periphery of the round bar material 6 is liquid-tightly abutted against the tapered part 2d, as shown in FIG. , small diameter cylindrical part 2e
All you have to do is release the blockage.
この大径筒状部２ｃにプレス装置の図外のラムと一体の
プランジャ７を液密かつ摺動自在に嵌挿する。具体的に
は、プランジャ７は、耐圧性を有するシールリング７ａ
を備え、シールリング７ａを介してプランジャ７を大径
筒状部２ｃに嵌挿し、液密を保持する。A plunger 7 integrated with a ram (not shown) of a press device is fitted into this large-diameter cylindrical portion 2c in a fluid-tight and slidable manner. Specifically, the plunger 7 includes a pressure-resistant seal ring 7a.
The plunger 7 is fitted into the large diameter cylindrical portion 2c via the seal ring 7a to maintain liquid tightness.
その後、プレス装置のラムを降下させ、押圧力をプラン
ジャ７及び潤滑液体５の薄膜を介して丸棒素材６の一端
に与える。これにより、非圧縮性の潤滑液体５を薄膜状
に周囲に介在させた丸棒素材６は、摩擦力を殆ど受ける
ことなく下降し、ダイ２のテーパ部２ｄによって縮径加
工され、他端部がダイ２の小径筒状部２ｅの開口から次
第に押出され、これによって押出加工によるひずみ硬化
されて一対のスペーサ４間に製品が得られる。Thereafter, the ram of the press device is lowered, and a pressing force is applied to one end of the round bar material 6 through the plunger 7 and the thin film of lubricating liquid 5. As a result, the round bar material 6 with the incompressible lubricating liquid 5 interposed in a thin film around it descends without receiving almost any frictional force, is reduced in diameter by the tapered part 2d of the die 2, and the other end is is gradually extruded from the opening of the small-diameter cylindrical portion 2e of the die 2, and is thereby strain-hardened by extrusion processing to obtain a product between the pair of spacers 4.
その際、プランジャ７と丸棒素材６の一端面との間に潤
滑液体５を介在させることにより、空洞部２ａの大径筒
状部２ｃ及びテーパ部２ｄに位置する丸棒素材６は、プ
レス装置のラムからの下圧力をプランジャ７から軸線方
向に受けると共に潤滑液体５による静水圧作用を外周か
ら受けて圧縮され、高密度化及び高強度化が促される。At that time, by interposing the lubricating liquid 5 between the plunger 7 and one end surface of the round bar material 6, the round bar material 6 located in the large diameter cylindrical part 2c and the tapered part 2d of the hollow part 2a is pressed. It receives the downward pressure from the ram of the device in the axial direction from the plunger 7, and is compressed by the hydrostatic pressure action of the lubricating liquid 5 from the outer periphery, thereby promoting high density and high strength.
このように、小径筒状部２ｅから押出される丸棒素材６
は、プレス装置のラムからの加圧力を受けるのみならず
潤滑液体５による静水圧作用をも受けて圧縮されると共
に、テーパ部２ｄを通過して押出加工によるひずみ硬化
を受けるため、高密度化及び高強度化が良好に得られる
。すなわち、丸棒素材６が大径筒状部２ｃ及びテーパ部
２ｄを通過する際、プランジャ７から軸線方向の押圧力
を受けると共に潤滑液体５による静水圧作用を大きく受
けるため、粉末成形材で気孔を有する丸棒素材６の密度
上昇が極めて良好に得られると共に、難加工性材料から
なる丸棒素材６の中心部にモミワレを生ずることが良好
に防止される。具体的には、焼結体である丸棒素材６内
の大きな気孔が大きく圧縮されて潰れ、混在する気孔の
大きさが揃うと共に、気孔率を０．５％以下に低下させ
ることができ、力学特性（例えば、引張強さ、伸び、衝
撃値等）が向上する。In this way, the round bar material 6 extruded from the small diameter cylindrical portion 2e
is compressed not only by the pressing force from the ram of the press device but also by the hydrostatic pressure action of the lubricating liquid 5, and at the same time passes through the tapered part 2d and undergoes strain hardening due to extrusion processing, resulting in high density. and high strength can be obtained satisfactorily. That is, when the round bar material 6 passes through the large-diameter cylindrical portion 2c and the tapered portion 2d, it receives a pressing force in the axial direction from the plunger 7 and a large hydrostatic pressure action from the lubricating liquid 5. The density of the round bar material 6 can be very well increased, and the occurrence of cracks in the center of the round bar material 6 made of a difficult-to-process material can be effectively prevented. Specifically, the large pores in the round bar material 6, which is a sintered body, are greatly compressed and collapsed, the sizes of the mixed pores become uniform, and the porosity can be reduced to 0.5% or less, Mechanical properties (eg, tensile strength, elongation, impact value, etc.) are improved.
更に、丸棒素材６の外周に薄膜状に介在させた潤滑液体
５によって、丸棒素材６とダイ２の空洞部２ａ壁との間
の摩擦力が極めて小さいものとなるので、加工中の丸棒
素材６内部のひずみ分布の変動が小さく、製品の力学特
性における不均一性が著しく軽減される。Furthermore, the frictional force between the round bar material 6 and the wall of the cavity 2a of the die 2 is extremely small due to the lubricating liquid 5 interposed in a thin film on the outer periphery of the round bar material 6, so that the round bar material 6 during processing is Fluctuations in the strain distribution inside the rod material 6 are small, and non-uniformity in the mechanical properties of the product is significantly reduced.
以上の説明によって理解されるように、本発明によれば
、次の効果が得られる。As understood from the above explanation, according to the present invention, the following effects can be obtained.
■、汎用プレス装置を使用することが可能であり、大が
かりな専用機を必要としないので、実施が容易である。(2) It is possible to use a general-purpose press device and does not require a large-scale dedicated machine, so it is easy to implement.
加えて、連続的な加工方法であるため、寸法精度の良好
な改善が得られ、かつ、曲がりを生じ難い。In addition, since it is a continuous processing method, dimensional accuracy can be improved and bending is less likely to occur.
■、丸棒素材内部にプランジャからの押圧力のみならず
大きな静水圧が作用するため、粉末成形材の密度上昇が
良好に得られ、かつ、軸線方向にも圧縮力が作用し、中
心部に軸線方向の引張応力が発生しないため、低延性で
難加工性素材において、加工中に半径方向に延在して生
ずる中心部のモミワレの防止に有効である。■Since not only the pressing force from the plunger but also a large hydrostatic pressure acts inside the round bar material, the density of the powder molded material can be increased well, and compressive force also acts in the axial direction, so that the center part Since no tensile stress is generated in the axial direction, it is effective in preventing fir cracks in the center of low-ductile and difficult-to-work materials that extend in the radial direction during processing.
更に、テーパ部を通過して押出加工によるひずみ硬化を
受けるため、高密度化及び高強度化が良好に得られる。Furthermore, since the material passes through the tapered portion and undergoes strain hardening due to extrusion processing, high density and high strength can be obtained satisfactorily.
■、潤滑液体が丸棒素材とダイ壁との間に薄膜状に介在
し、この間の摩擦を著しく軽減するので、加工中の丸棒
素材内部に発生するひずみ分布の変動が小さく、製品の
力学特性における不均一性が軽減される。■The lubricating liquid is interposed in the form of a thin film between the round bar material and the die wall, and the friction between them is significantly reduced, so fluctuations in the strain distribution that occur inside the round bar material during processing are small, resulting in improved product dynamics. Non-uniformity in properties is reduced.
■、焼結体である丸棒素材内の大きな気孔が静水圧作用
によって大きく圧縮されて潰れ、混在する気孔の大きさ
が揃うと共に、気孔率を０．５％以下に低下させること
ができ、その結果力学特性が向上する。■The large pores in the round bar material, which is a sintered body, are greatly compressed and collapsed by the hydrostatic pressure, making it possible to equalize the size of the mixed pores and reduce the porosity to 0.5% or less. As a result, mechanical properties are improved.
第１〜３図は本発明の１実施例を示し、第１図は粉末成
形材の加工装置を示す断面図、第２図はダイを示す断面
図、第３図は作用説明図である。
■＝コンテナ、１ａ：段面、１ｂ＝大径穴部。
ＩＣ＝小径穴部、２：ダイ、２．］：空洞部、２ｂ：開
口、２ｃ：大径筒状部、２ｄ：テーパ部、２ｅ：小径筒
状部２３ニブレス装置のヘッド、４：スベーザ、５：潤
滑液体、６；丸捧素材、７：プランジャ１７ａ：シール
リング。
代理人 弁理士 前 １）宏 之
第２図
ｂ1 to 3 show one embodiment of the present invention, in which FIG. 1 is a cross-sectional view showing a processing apparatus for powder molded material, FIG. 2 is a cross-sectional view showing a die, and FIG. 3 is an explanatory view of the operation. ■=Container, 1a: Step surface, 1b=Large diameter hole. IC=small diameter hole, 2: die, 2. ]: Cavity part, 2b: Opening, 2c: Large diameter cylindrical part, 2d: Tapered part, 2e: Small diameter cylindrical part 23 Head of nibless device, 4: Sveza, 5: Lubricating liquid, 6: Marble material, 7 : Plunger 17a: Seal ring. Agent Patent Attorney 1) Hiroshi Figure 2b
Claims (1)
径するテーパ部及び他端が開口する小径筒状部を形成す
るダイを用い、該ダイの大径筒状部内に該大径筒状部よ
りも小径をなし、粉体を焼結した丸棒素材を挿入し、該
丸棒素材の周囲に潤滑液体を介在させた状態で、該大径
筒状部に液密なプランジャを摺動自在に嵌挿し、該プラ
ンジャに一端側からの押圧力を作用させて該丸棒素材を
ダイのテーパ部及び小径筒状部を順次に通過させ、押出
し加工によるひずみ硬化させることを特徴とする粉末成
形材の加工方法。(1) Using a die that sequentially forms an opening, a large-diameter cylindrical portion, a tapered portion with a gradually decreasing diameter, and a small-diameter cylindrical portion whose other end is open, from one end, the die is inserted into the large-diameter cylindrical portion of the die. A round bar material with a smaller diameter than the large diameter cylindrical part and made of sintered powder is inserted, and with lubricating liquid interposed around the round bar material, the large diameter cylindrical part is sealed in a liquid-tight manner. A plunger is slidably inserted, and a pressing force is applied to the plunger from one end to cause the round bar material to pass sequentially through the tapered part and small diameter cylindrical part of the die, and to strain harden by extrusion processing. Characteristic processing method for powder molded materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2131353A JPH0723485B2 (en) | 1990-05-23 | 1990-05-23 | Sintered material processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2131353A JPH0723485B2 (en) | 1990-05-23 | 1990-05-23 | Sintered material processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0426709A true JPH0426709A (en) | 1992-01-29 |
| JPH0723485B2 JPH0723485B2 (en) | 1995-03-15 |
Family
ID=15055949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2131353A Expired - Lifetime JPH0723485B2 (en) | 1990-05-23 | 1990-05-23 | Sintered material processing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0723485B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04358007A (en) * | 1991-02-02 | 1992-12-11 | Japan Steel Works Ltd:The | Method for reducing rod-shaped sintered material |
| WO2007026165A1 (en) * | 2005-09-02 | 2007-03-08 | Avx Limited | Method of forming anode bodies for solid state capacitors |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5253756A (en) * | 1975-10-29 | 1977-04-30 | Ishikawajima Harima Heavy Ind | Moulding method for metal powder |
-
1990
- 1990-05-23 JP JP2131353A patent/JPH0723485B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5253756A (en) * | 1975-10-29 | 1977-04-30 | Ishikawajima Harima Heavy Ind | Moulding method for metal powder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04358007A (en) * | 1991-02-02 | 1992-12-11 | Japan Steel Works Ltd:The | Method for reducing rod-shaped sintered material |
| WO2007026165A1 (en) * | 2005-09-02 | 2007-03-08 | Avx Limited | Method of forming anode bodies for solid state capacitors |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0723485B2 (en) | 1995-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10814370B2 (en) | Special-purpose die for shaping aluminum-magnesium alloy by rotating extrusion | |
| US4521360A (en) | Methods of compaction by incremental radial compression and/or low-ratio extrusion | |
| EP2080571A1 (en) | High-strength process material, method of producing the same and production apparatus therefor | |
| RU2634821C2 (en) | Method for direct or reverse pressing of metal pipes, mandrel for pressing of metal pipes, press for extrusion of metal pipes and extruded metal pipe | |
| JPH0426709A (en) | Method for working powder molding material | |
| DE3502675A1 (en) | Method for the compression moulding of a moulding | |
| DE1815957A1 (en) | Ceramic nuclear fuel pellet | |
| JPS61190007A (en) | Production of hot extruded clad metallic pipe by powder metallurgical method | |
| US3066556A (en) | Method and apparatus for establishing high fluid pressure | |
| US3805574A (en) | Equipment for extrusion | |
| JPH0563257B2 (en) | ||
| JPH0513736B2 (en) | ||
| JPH051096B2 (en) | ||
| JPS63260632A (en) | Liquid pressure bulging method | |
| RU2413593C2 (en) | Method of producing articles from porous materials of artificial and natural origin by cold cubic deformation | |
| RU2542046C2 (en) | Forming of hardly-deformed materials (versions) | |
| DE102006033266A1 (en) | Profiled metal component for fluid sheaths and method for providing a pressure sensor thereto | |
| JP3453408B2 (en) | Press device with clamping means | |
| US3802243A (en) | Method and equipment for extrusion | |
| DE1758202C3 (en) | Method and device for the manufacture of dense solid or hollow profiles by powder metallurgical extrusion | |
| JPH04358007A (en) | Method for reducing rod-shaped sintered material | |
| Eudier | Pressing and Sizing Factors Affecting the Precision and Mechanical Characteristics of Sintered Parts | |
| RU2084304C1 (en) | Method for hydraulically extruding precise shapes of non-ferrous and noble metal alloys | |
| DE2006017A1 (en) | Press for isostatic pressing | |
| JPS63203229A (en) | Manufacture of hollow pin |