JPS60135210A - Manufacture of sintering body - Google Patents
Manufacture of sintering bodyInfo
- Publication number
- JPS60135210A JPS60135210A JP24185483A JP24185483A JPS60135210A JP S60135210 A JPS60135210 A JP S60135210A JP 24185483 A JP24185483 A JP 24185483A JP 24185483 A JP24185483 A JP 24185483A JP S60135210 A JPS60135210 A JP S60135210A
- Authority
- JP
- Japan
- Prior art keywords
- sintered body
- core material
- manufacturing
- pores
- molded body
- 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
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明はセラミックス焼結ダイスなどの細孔を有する焼
結体の製造に適する製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a manufacturing method suitable for manufacturing a sintered body having pores such as a ceramic sintered die.
タングステンワイヤなどの線材の製造に使用される線引
き用ダイスにおいては、最近ダイヤモンドや超硬会合な
どに代えて、耐摩耗性および高温特性に優れたセラミッ
クス焼結体を用いることが試みられている。Recently, attempts have been made to use ceramic sintered bodies, which have excellent wear resistance and high-temperature properties, in place of diamond, cemented carbide, etc., in wire drawing dies used for manufacturing wire rods such as tungsten wire.
しかして、線引き用ダイスは、被加工材を通して加工を
行なうための直径０．１〜０．５朋程度の細孔ヲ鳴して
いるので、ダイスの製造ＶＣ６＊つては細孔を容易且つ
安価に製造できることが要求される。However, since the wire drawing die has a pore with a diameter of about 0.1 to 0.5 mm for processing through the workpiece, it is easy and inexpensive to manufacture the die. It is required that it can be manufactured to
しかるに、従来セラミックス焼結体からなるダイスを＃
！造する場合には、焼結体にレーザ加工や放電加工を施
して細孔を形成していた。しかしながらこの場合には、
特別に細孔を形成する加工を必要とするとともに、レー
ザ加工や放電加工は加工費が高いという問題がある。However, conventionally, dies made of ceramic sintered bodies were
! When manufacturing, the sintered body was subjected to laser machining or electrical discharge machining to form pores. However, in this case,
In addition to requiring special processing to form pores, laser processing and electrical discharge processing have the problem of high processing costs.
本発明は前記事惺に基づいてなされたもので、細孔の加
工を容易且つ安価に行なうことができる細孔を有する焼
結体の製造方法を提供することを目的とするものである
。The present invention has been made based on the above-mentioned findings, and an object of the present invention is to provide a method for manufacturing a sintered body having pores, which allows the pores to be easily and inexpensively processed.
本発明の焼結体の製造方法は、粉末成形時に粉末中に芯
材を存在させて成形体を成形する工程と、成形体から芯
材を除去する工程と、成形体を焼結して焼結体を得る工
程とを具備するものである。The method for producing a sintered body of the present invention includes a step of forming a compact by making a core material exist in the powder during powder compaction, a step of removing the core material from the compact, and a step of sintering the compact. and a step of obtaining solids.
本発明が特に有効な焼結体は、例えば細孔を有するもの
である。焼結体としては酸化アルミニウム（Ａ７＊ Ｏ
ｓ ） 、窒化けい素（ＳｉｓＮ４）などのセラミック
スからなるものに適する。また、粉末冶金法が適用でき
る超硬会合からなる焼結体も適用できる。A sintered body to which the present invention is particularly effective is, for example, one having pores. The sintered body is aluminum oxide (A7*O
s), suitable for ceramics such as silicon nitride (SisN4). Furthermore, a sintered body made of cemented carbide to which powder metallurgy can be applied can also be applied.
本発明の製造方法においては、プレス金型によシ原料粉
末を加圧して成形体を成形する。この林７合、例えはプ
レス金型においてはダイスを介して加圧パンチに芯材を
挿通して支持し、この世相全通した状態で成形体を成形
する。芯材にはモリブデンワイヤ、タングステンワイヤ
などの高融点金属からなるもの、あるいはピアノ紳など
からなる抗張力の大きい金属線材である。In the manufacturing method of the present invention, raw material powder is pressurized by a press mold to form a compact. In this case, for example, in a press mold, a core material is inserted and supported through a pressurizing punch through a die, and a molded body is formed in a state where the core material is completely passed through. The core material is made of a high melting point metal such as molybdenum wire or tungsten wire, or a metal wire material with high tensile strength such as piano wire.
第１図および第２図は成形体の成形工程の一例？示して
いる。図中１はダイ、２は上パンチ、３は下パンチ、４
，４はパンチホルダ、５は芯材、６は芯材支えである。Are Figures 1 and 2 an example of the molding process for a molded body? It shows. In the figure, 1 is the die, 2 is the upper punch, 3 is the lower punch, 4
, 4 is a punch holder, 5 is a core material, and 6 is a core material support.
上パンチ２と下バンチａには、芯材５ｆｔ通すための細
孔２ａ、Ｊａと、芯材支え６を逃がすための切欠部ｚｂ
。The upper punch 2 and the lower bunch a have pores 2a and Ja for passing 5 ft of core material through, and a notch zb for allowing the core support 6 to escape.
.
３ｂが夫々上下方向に形成しである。芯材５は、ダイス
の内部空ｌｉｔを介して上ダイス２と下ダイス３の細孔
２ａ、Ｊａに挿通され、両端を芯材支え６に固定するこ
とによシ緊張して支持される。芯材支え６の両端は上パ
ンチ２と下バンチ３の切欠部２ｂ、３ｂに位置する。こ
６の状態で、ダイ１の内部空間に原料粉末７を充填する
と、ダイＪの内部空間を通る芯材５が原料粉末７の内部
に埋込まれる。なお、原料粉末７には焼結助剤を混合す
る。そして、上パンチ２と下ノ（ンチ３によりｅ相粉末
７を加圧して粉末成形体を成形する。粉末成形体は芯材
５を埋込んだ状態で成形される０なお、上パンチ２と下
）（ンチ３が上下移動する時に、切欠部２ｂ、３ｂによ
シ芯材支え６を逃がすことができる。3b are formed in the vertical direction, respectively. The core material 5 is inserted into the pores 2a and Ja of the upper die 2 and the lower die 3 through the internal spaces of the dies, and is supported under tension by fixing both ends to the core material supports 6. Both ends of the core support 6 are located in the notches 2b and 3b of the upper punch 2 and lower bunch 3. When the raw material powder 7 is filled into the internal space of the die 1 in this state 6, the core material 5 passing through the internal space of the die J is embedded inside the raw material powder 7. Note that a sintering aid is mixed into the raw material powder 7. Then, the e-phase powder 7 is pressed by the upper punch 2 and the lower punch 3 to form a powder compact.The powder compact is molded with the core material 5 embedded. (Bottom) (When the punch 3 moves up and down, the core material support 6 can be released through the notches 2b and 3b.
次いで、成形された成形体から芯材を抜き取り、成形体
に細孔を形成する０第１図および第２図では例えば芯材
５の両端を芯材支え６から外して引くことによシ、芯材
５を成形体と上）くンチ２および下パンチ３から抜き増
るＯこのため、成形体における芯材５が埋込まれていた
部分には、芯材５に応じた大きさの細孔が空間部として
形成される。Next, the core material is extracted from the molded body, and pores are formed in the molded body. The core material 5 is removed from the molded body and the upper) punch 2 and lower punch 3. Therefore, in the part of the molded body where the core material 5 was embedded, a thin strip of a size corresponding to the core material 5 is inserted. A hole is formed as a space.
次いで、成形体を焼結する０これによシ第３図で示すよ
うに細孔８を有するセラミックス焼結体９を得ることが
できる。Next, the compact is sintered, thereby obtaining a ceramic sintered body 9 having pores 8 as shown in FIG.
さらに、焼結体の用途に応じて細孔に加工を施す。Furthermore, the pores are processed depending on the use of the sintered body.
本発明の製造方法においては、直径１朋以下の細孔を有
する焼結体を一得ることができ、特に直径に比して長さ
が大なる細孔の加工を容易に行なえる。成形体の成形時
に芯材を緊張した状態で真直に支持するので、細孔は良
好な直線性をもって形成できる。芯材は成形体の段階で
抜き取るので、焼結体を成形する時に芯材が焼結体の品
質に何ら影響を与えない。In the manufacturing method of the present invention, a sintered body having pores with a diameter of 1 mm or less can be obtained, and in particular, pores whose length is larger than the diameter can be easily processed. Since the core material is supported straight under tension during molding of the molded body, the pores can be formed with good linearity. Since the core material is extracted at the stage of forming the compact, the core material does not affect the quality of the sintered compact when the compact is formed.
本発明は線引き用ダイスを製造する場合に適している。The present invention is suitable for manufacturing wire drawing dies.
この場合には、第３図で示す焼結体にラッピング加工な
どを施して、第４図で示すダイスを形成する。また、そ
の他に長さが大なる細孔を有する製品、あるいは複数の
孔を必要とする製品等を製造する場合にも適している。In this case, the sintered body shown in FIG. 3 is subjected to lapping or the like to form the die shown in FIG. 4. In addition, it is also suitable for manufacturing products that have long pores or products that require a plurality of pores.
〔発明の実施例〕
第１図および第２図で示すプレス金型を用いて、窒化け
い素粉末に焼結助剤として酸化イツトリウム及び酸化ア
ルミニウム等を混合してなる混合粉末を、成形圧約８６
０ ｋｇ７／１ｒｒｒｒ″で加圧して成形体を成形した
。この場合、芯材としては直径Ｑ、ｌ ｘｘのモリブデ
ンワイヤを使用した。次いで、成形体から芯材を抜き取
った。その後に成形体を焼結して直径０．０８朋の細孔
を有する焼結体を得た。さらに、焼結体の細孔にラッピ
ング加工を施して第４図で示すダイスを成形した。[Embodiments of the Invention] Using the press mold shown in FIGS. 1 and 2, a mixed powder made of silicon nitride powder mixed with yttrium oxide, aluminum oxide, etc. as a sintering aid was heated to a molding pressure of about 86
A molded body was molded by applying pressure at 0 kg7/1rrrr''. In this case, a molybdenum wire with a diameter Q and lxx was used as the core material. Next, the core material was extracted from the molded body. After that, the molded body was A sintered body having pores with a diameter of 0.08 mm was obtained by sintering.Furthermore, the pores of the sintered body were subjected to a lapping process to form a die shown in FIG.
また、同様に直径０．５朋のモリブデンワイヤを用いた
ところ直径約０．４朋の細孔を有する焼結体を得ること
ができた。Similarly, when a molybdenum wire with a diameter of 0.5 mm was used, a sintered body having pores with a diameter of about 0.4 mm could be obtained.
なお、この実施例で適用した窒化けい素セラミックスは
、セラミックスのなかでも耐摩耗性に優れ、線引ダイス
に好適であるが、従来は加工が困離であった。本願発明
によれば容易に窒化けい素糸セラミックスの線引ダイス
が容易に製造できる。The silicon nitride ceramic used in this example has excellent wear resistance among ceramics and is suitable for wire drawing dies, but it has been difficult to process in the past. According to the present invention, a silicon nitride ceramic wire drawing die can be easily manufactured.
本発明の焼結体の製造方法は以上説明したように、芯材
を存在させた状態で成形体を加圧成形し、その後に成形
体から芯材を除去することによシ成形体に所望の孔部等
を形成するので、焼結体に特別かつ複雑な加工を要する
ことなく焼結体を容易且つ安価に形成できる。As explained above, the method for producing a sintered body of the present invention is to press-form a molded body in a state where a core material is present, and then remove the core material from the molded body to obtain a desired shape. Since the holes and the like are formed, the sintered body can be easily and inexpensively formed without requiring special and complicated processing of the sintered body.
図面は本発明の製造方法を示すもので、第１図は成形体
の成形工程に用いるプレス金型を示す正面断面図、第２
図は同仙１面断面図、第３図は炉；給体を示す断面図、
第４図は線引き用ダイスを示す断面図である。The drawings show the manufacturing method of the present invention, and FIG.
The figure is a sectional view of the same side, and Figure 3 is a sectional view showing the furnace;
FIG. 4 is a sectional view showing the wire drawing die.
Claims (7)
体を成形する工程と、前記成形体から前−記芯材？除去
する工程と、前記成形体を焼結して焼結体を得る工程と
を具備するこ−とを特徴とする焼結体の＃！造方法。(1) At the time of powder molding, a step of molding a molded body by making a core material exist in the powder, and a step of molding the molded body from the core material. #! of a sintered body characterized by comprising a step of removing and a step of sintering the molded body to obtain a sintered body! Construction method.
範囲第（１）項に記載の焼結体の製造方法。(2) A method for producing a sintered body according to claim (1), wherein the core material is formed by penetrating the molded body in a straight manner.
求の範囲第（１）項に記載の焼結体の製造方法。(3) The method for manufacturing a sintered body according to claim (1), wherein the sintered body is made of ceramics.
特許請求の範囲第（３）項に記載の焼結体の製造方法。(4) The method for producing a sintered body according to claim (3), wherein the ceramic is a silicon nitride thread ceramic.
囲第（１）項に記載の焼結体の製造方法。(5) The method for manufacturing a sintered body according to claim (1), wherein the core material is made of a metal wire.
囲第（１）項に記載の焼結体の製造方法。(6) The method for manufacturing a sintered body according to claim (1), wherein the core material has a diameter of 1 txwr or less.
（１）項に記載の焼結体の製造方法。(7) The method for manufacturing a sintered body according to claim (1), wherein the sintered body is a wire drawing die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24185483A JPS60135210A (en) | 1983-12-23 | 1983-12-23 | Manufacture of sintering body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24185483A JPS60135210A (en) | 1983-12-23 | 1983-12-23 | Manufacture of sintering body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60135210A true JPS60135210A (en) | 1985-07-18 |
Family
ID=17080493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24185483A Pending JPS60135210A (en) | 1983-12-23 | 1983-12-23 | Manufacture of sintering body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60135210A (en) |
-
1983
- 1983-12-23 JP JP24185483A patent/JPS60135210A/en active Pending
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