JPS6153401A - Manufacturing method of ceramics turbine wheel - Google Patents

Manufacturing method of ceramics turbine wheel

Info

Publication number
JPS6153401A
JPS6153401A JP17479784A JP17479784A JPS6153401A JP S6153401 A JPS6153401 A JP S6153401A JP 17479784 A JP17479784 A JP 17479784A JP 17479784 A JP17479784 A JP 17479784A JP S6153401 A JPS6153401 A JP S6153401A
Authority
JP
Japan
Prior art keywords
sintered
shaft
wheel
center
unsintered
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
Application number
JP17479784A
Other languages
Japanese (ja)
Other versions
JPH0635806B2 (en
Inventor
Masami Yamazaki
山崎　正己
Yoji Sakurai
桜井　陽二
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP17479784A priority Critical patent/JPH0635806B2/en
Publication of JPS6153401A publication Critical patent/JPS6153401A/en
Publication of JPH0635806B2 publication Critical patent/JPH0635806B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/284—Selection of ceramic materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/04—Blade-carrying members, e.g. rotors for radial-flow machines or engines
    • F01D5/043—Blade-carrying members, e.g. rotors for radial-flow machines or engines of the axial inlet- radial outlet, or vice versa, type
    • F01D5/048—Form or construction

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

PURPOSE:To realize processing which is not affected by a warp and a curve by setting, on the sintered shaft part, an axis for finish processing of the sintered shaft part while treating the center of rotation of a sintered wheel part of a ceramic turbine wheel, formed through sintering ceramics, as the standard of said setting. CONSTITUTION:At the time of the captioned manufacturing, after first forming an unsintered turbine wheel 30 from silicon nitride (Si3N4), center holes are drilled on the end part of an unsintered shaft part 10 and the end part of a hub 21 as standards for the unsintered shaft part processing, and each hole is utilized for rough processing on the outer peripheral face of said shaft part 10. After subsequent sintering, a support implement Q is fixed in the center hole 40 on the end part of a sintered wheel part 20a, while a support implement S with the flat tip is adhered closely to the back face 24 of the hub 21. Thus, an axis Y for finishing the sintered shaft part is set in a sintered shaft part 10a while treating the rotation center X of a sintered wheel part 20a as the standard of setting. Later, a conical stand-shaped cutting part 51 is formed by means of an axis processing implement 50 and supported by means of a support implement, and then the sintered shaft part 10a is processed for finishing.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本願光明は、自動車等のターボチャージャに用いるセラ
ミックスタービンホイールの製造方法に関する。セラミ
ックスタービンホイールは、セラミックスを焼結したも
ので、焼結軸部と、該焼結軸部により回転される焼結ホ
イール部とを有している。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a ceramic turbine wheel used in a turbocharger for an automobile or the like. A ceramic turbine wheel is made of sintered ceramics and includes a sintered shaft and a sintered wheel rotated by the sintered shaft.

［従来の技術］ 近時、過渡応答性の改善、駆動温度を上昇させ燃費の向
上を図るため等の理由により、セラミックスタービンホ
イールが開発されている。[Prior Art] Ceramic turbine wheels have recently been developed for reasons such as improving transient response and increasing driving temperature to improve fuel efficiency.

セラミックスでタービンホイールを製ａするにあたって
は、従来より、セラミックスで未焼結のタービンホイー
ルを所定の形状に成形する成形工程、未焼結のタービン
ホイールを高温下で焼結しこれにより焼結タービンホイ
ールを形成する焼結工程、その後、焼結タービンホイー
ルの焼結軸部を正規の寸法、形状に仕上げる仕上工程を
行う。In manufacturing a turbine wheel using ceramics, there has traditionally been a molding process in which an unsintered ceramic turbine wheel is molded into a predetermined shape, and an unsintered turbine wheel is sintered at high temperatures to form a sintered turbine wheel. A sintering process to form the wheel is followed by a finishing process to finish the sintered shaft of the sintered turbine wheel into regular dimensions and shape.

然し、上記した製造方法では、焼結する際に、径小な焼
結軸部がそり曲り易い。このようにそり曲った焼結軸部
を、仕上工程において正規の寸法、形状に正確に仕上げ
ることは容易ではない。正確に仕上げないと、タービン
ホイールは駆動時に首振り、回転ムラ等の問題を生じる
。However, in the above-described manufacturing method, the small-diameter sintered shaft portion tends to warp during sintering. It is not easy to accurately finish such a curved sintered shaft portion into regular dimensions and shape in a finishing process. If the turbine wheel is not finished accurately, problems such as wobbling and uneven rotation will occur when the turbine wheel is driven.

例えば従来の代表的な製造方法は、最初の成形工程で、
第４図に示すように未焼結軸部１と未焼結ホイール部２
とをもつ未焼結タービンホイール３をセラミックスで成
形する。次に軸部１の端部とホイール部２のハブ先端に
センタ穴を加工ａｌ　ｇＱする。その上で、ｗ５４図に
示ずように未焼結軸部１の端部のセンター穴に支持具Ｐ
を固定すると共に、未焼結ホイール部２のハブ先端のセ
ンター穴に支持具Ｑ（支持具Ｐと同Ｎ）を固定し、その
状態で未焼結軸部１の外周面の荒加工を行なう。For example, in the conventional typical manufacturing method, in the first molding process,
As shown in Fig. 4, the unsintered shaft part 1 and the unsintered wheel part 2
The unsintered turbine wheel 3 having the above is molded from ceramics. Next, a center hole is machined in the end of the shaft portion 1 and the hub tip of the wheel portion 2. Then, insert the support P into the center hole at the end of the unsintered shaft part 1 as shown in figure w54.
At the same time, a support Q (same N as support P) is fixed in the center hole at the tip of the hub of the unsintered wheel part 2, and in this state, rough machining of the outer peripheral surface of the unsintered shaft part 1 is performed. .

次に焼結工程では、未焼結タービンホイール３を８温で
焼結して焼結タービンホイール３ａを形成する。焼結の
際には、焼結軸部１ａが付は根部分Ｐ＋（第５図に示す
）からそり曲がりやすい。Next, in the sintering step, the unsintered turbine wheel 3 is sintered at 8 temperatures to form a sintered turbine wheel 3a. During sintering, the sintered shaft portion 1a tends to warp from the root portion P+ (shown in FIG. 5).

第５図において！ＱＲ＋ｆは、そり曲がった焼結軸部１
ａの中心線を示ず。In Figure 5! QR+f is the curved sintered shaft part 1
The center line of a is not shown.

次に、仕上工程では、第５図に示づ“ように、最初の成
形工程で用いた上記センター穴に再び支持具Ｐ及びＱを
前述同様に固定し、その状態で焼結軸部１ａの仕上げ加
工を行うことにしている。Next, in the finishing step, as shown in FIG. I am planning on doing some finishing work.

この仕上げ工程では、最初の成形工程で用いたセンター
穴を用いる。そのため、焼結タービンホイール３ａの焼
結軸部１ａに反り曲りが生じている場合には、第５図に
示すように焼結タービンホイール３ａのハブ背面４が角
度ｅ傾斜する状態で、焼結軸部１ａを仕上ることになる
。そのため、第６図に示ずように、駆動軸５の孔部５ａ
に焼結軸部１ａを嵌着したときには、ハブ背面４は角度
ｅ傾く。従って焼結ホイール部２ａの質伯中心Ｐ２（第
５図参照）もｒぶんずれる。よって、回転中心軸に対し
ズレｒに応じたアンバランスを生む問題が生じる。これ
を抑えるには修正作業を行えばよいが、この修正作業は
かなり複雑で長い加工時間を要する。更に、ターボチャ
ージャに装着された状態において、タービンハウジング
６のスクロール７のノズル部８に対する距離ｅ＋どｅ２
とが不一致どなる（ｅ　＋≠ｅｇ）。従ってセラミック
スタービンホイールは駆動時に首振りを起し、回転ムラ
、延いてはタービンホイールの空力性０ピの低下といっ
た問題が生じる。This finishing step uses the center hole used in the first molding step. Therefore, when the sintered shaft portion 1a of the sintered turbine wheel 3a is bent, the hub back surface 4 of the sintered turbine wheel 3a is inclined at an angle e as shown in FIG. The shaft portion 1a will now be finished. Therefore, as shown in FIG. 6, the hole 5a of the drive shaft 5
When the sintered shaft portion 1a is fitted to the hub rear surface 4, the hub back surface 4 is inclined at an angle e. Therefore, the quality center P2 (see FIG. 5) of the sintered wheel portion 2a is also shifted by r. Therefore, a problem arises in which an unbalance occurs depending on the deviation r with respect to the rotation center axis. This can be suppressed by corrective work, but this corrective work is quite complex and requires a long processing time. Furthermore, when the turbine housing 6 is attached to the turbocharger, the distance between the scroll 7 and the nozzle portion 8 of the turbine housing 6 is e + e2.
What happens when there is a mismatch between the two (e +≠eg)? Therefore, the ceramic turbine wheel oscillates when driven, causing problems such as uneven rotation and a decrease in the aerodynamic performance of the turbine wheel.

［発明が解決しようとする問題点コ 本願発明は、焼結の際に焼結軸部が反り曲った場合であ
っても、焼結軸部を所定の寸法、形状に容易に仕上げる
ことができ、これにより上記したアンバランスの発生、
および、首振り、回転ムラ、空力性能の低下といった問
題の発生を抑イ１］できるセラミックスタービンホイー
ルの製造方法を提供することを目的とする。[Problems to be Solved by the Invention] The present invention makes it possible to easily finish the sintered shaft into a predetermined size and shape even if the sintered shaft is warped during sintering. , This causes the above-mentioned imbalance,
Another object of the present invention is to provide a method for manufacturing a ceramic turbine wheel that can suppress the occurrence of problems such as oscillation, uneven rotation, and deterioration of aerodynamic performance.

ｃ問題点を解決するための手段］ 本願発明のＬラミックスタービンホイールの製造方法は
、セラミックスで、正規の寸法よりも厚肉とした未焼結
軸部と該未焼結軸部と一体的に形成された未焼結ホイー
ル部とをもつ未焼結タービンホイールを成形する成形工
程と、 前記未焼結タービンホイール本体を焼結し、焼結軸部と
焼結ホイール部をもつ焼結タービンホイールを得る焼結
工程と、 前記焼結ホイール部の回転中心を基準として、前記焼結
軸部仕上げ加工用の軸芯を、前記焼結帖部に設定する軸
芯設定工程と、 前記仕上げ加工用の軸芯を加工基準どして前記焼結軸部
を正規の寸法に仕上げる仕上工程とを順次実施してなる
ものである。C. Means for Solving the Problems] The method for manufacturing the L laminated turbine wheel of the present invention includes an unsintered shaft portion made of ceramic and made thicker than the regular dimensions, and an integral part of the unsintered shaft portion. a sintered turbine wheel having a sintered shaft portion and a sintered wheel portion; a sintering process for obtaining a wheel; an axis setting process for setting an axis for finishing the sintered shaft part in the sintered groove part with reference to the center of rotation of the sintered wheel part; and the finishing process. A finishing step of finishing the sintered shaft portion to regular dimensions using the shaft core of the sintered shaft as a processing standard is performed sequentially.

成形工程では、セラミックスで、未焼結軸部と該未焼結
軸部と一体的に形成された未焼結ホイール部とをもつ未
焼結タービンホイールを成形するものである。ここで、
「未焼結ホイール部Ｊは、Ｎ部を有する部材で、単にセ
ラミックスを所定の形状に成形しただけの未焼結のもの
を意味する。In the molding step, a green turbine wheel is formed from ceramics, and has a green shaft portion and a green wheel portion formed integrally with the green shaft portion. here,
“The unsintered wheel portion J is a member having an N portion, and means an unsintered member simply formed by molding ceramics into a predetermined shape.

「未焼結軸部Ｊは、未焼結ホイール部の支持軸となる部
材で、単にセラミックスを成形しただりの焼結していな
いものを意味する。未焼結軸部は正規の寸法より°も厚
肉である。厚肉とするｍは、焼結による反り曲り蚤を考
慮して定める。従って焼結による反り曲りｍが大ぎいと
きには、通常、厚肉とする伍は比較的大きく設定する。"The unsintered shaft part J is a member that becomes the support shaft of the unsintered wheel part, and means something that is not simply molded ceramics or sintered. The thickness is also thick. The thickness m is determined by taking into consideration the warping and bending caused by sintering. Therefore, when the warping and bending m due to sintering is large, the thickness is usually set to be relatively large. .

又、反り曲り量が小さいときには、通常、厚肉とする■
は比較的小さく設定する。セラミックスは一般に用いら
れる材料を用いる事ができるが、具体的には窒化珪素（
Ｓ＋３Ｎ４）、炭化珪素（Ｓ　ｉ　Ｃ）を用いることが
できる。Also, when the amount of warping is small, thick walls are usually used.
is set relatively small. Ceramics can be made of commonly used materials, but specifically silicon nitride (
S+3N4), silicon carbide (S i C) can be used.

焼結工程では、従来と同様に、前記未焼結タービンホイ
ールを焼結し、焼結軸部と焼結ホイール部をもつ焼結タ
ービンホイールを得る。焼結温度、焼結時間は、セラミ
ックスの種類などによって適Ｔｉ設定する。焼結工程を
行ったとぎには、前述したように焼結の影響をうけて焼
結軸部は焼結ホイール部に対して変形し、若干反り曲る
ことか多い。In the sintering step, the unsintered turbine wheel is sintered as in the conventional method to obtain a sintered turbine wheel having a sintered shaft portion and a sintered wheel portion. The sintering temperature and sintering time are set appropriately depending on the type of ceramics and the like. After the sintering process is performed, as described above, the sintered shaft portion is deformed relative to the sintered wheel portion due to the influence of sintering, and is often slightly warped.

本願発明を特色づ１プる軸芯設定工程では、前記焼結ホ
イール部の回転中心を基準として前記焼結軸部仕上げ加
工用の軸芯を、前記焼結軸部に設定する。「焼結ホイー
ル部の回転中心」とは、焼結ホイール部のみの回転中心
のことであり、焼結ホイール部が回転する際にアンバラ
ンスを生じさせないような軸芯を意味する。焼結ホイー
ル部の回転中心は、該焼結ホイール部のハブ先端の中心
点を通り、該ハブの背面に垂直な線として規定すること
ができる。又、焼結ホイール部の回転中心は、焼結ホイ
ール部の径方向寸法の中心としてとらえることもできる
。In the axial center setting step that characterizes the present invention, an axial center for finishing the sintered shank is set in the sintered shank with the rotation center of the sintered wheel as a reference. The term "center of rotation of the sintered wheel section" refers to the center of rotation of only the sintered wheel section, and means an axis that does not cause unbalance when the sintered wheel section rotates. The center of rotation of the sintered wheel portion can be defined as a line passing through the center point of the tip of the hub of the sintered wheel portion and perpendicular to the back surface of the hub. Further, the rotation center of the sintered wheel portion can also be regarded as the center of the radial dimension of the sintered wheel portion.

軸芯設定工程において、「焼結ホイール部の回転中心を
基準として焼結軸部仕上げ加工用の軸芯を設定する」と
は、焼結ホイール部の回転中心を焼結軸部の端まで延長
し、その延長した部分を焼結軸部仕上加工用の軸芯とす
るという意味である。In the axis setting process, "setting the axis for finishing the sintered shaft based on the rotation center of the sintered wheel" means to extend the rotation center of the sintered wheel to the end of the sintered shaft. This means that the extended portion is used as the shaft core for finishing the sintered shaft portion.

ここで、焼結ホイール部の回転中心と同軸的であり該回
転中心と同軸的に回転する軸芯加工工具を設け、この軸
芯加工工具で、焼結軸部の先端を切削することにより軸
芯設定工程は行なうことができる。焼結軸部の先端の切
削は、該焼結軸部の先端の外周端面を円錘台状に切削す
ることによりなされる。又場合によっては、焼結軸部の
先９ｉ：の切削は、該焼結軸部の先端の端面を金属１１
１１部の加工で一般的に行うセンター穴状に切削するこ
とにより行ってもよい。Here, a shaft machining tool that is coaxial with the rotation center of the sintered wheel section and rotates coaxially with the rotation center is provided, and the shaft core processing tool is used to cut the tip of the sintered shaft section. A core setting step can be performed. The tip of the sintered shaft is cut by cutting the outer peripheral end surface of the tip of the sintered shaft into a truncated cone shape. In some cases, cutting the tip 9i of the sintered shaft may cut the end surface of the tip of the sintered shaft to the metal 11.
This may be done by cutting into a center hole shape, which is generally performed in the processing of the 11th part.

仕上げ工程では、前記仕上げ加工用の軸芯を加工基準と
して前記焼結軸部を正規の寸法に仕上げる。これにより
成形工程で未焼結軸部に形成された厚肉部分を除去する
。この工程では通常の仕上げ用工具を用いることができ
る。In the finishing step, the sintered shaft portion is finished to regular dimensions using the finishing shaft core as a processing reference. This removes the thick portion formed on the unsintered shaft during the forming process. Conventional finishing tools can be used in this step.

［発明の作用］ 本願発明の製造方法では、焼結ホイール部の回転中心を
基準として、焼結軸部仕上げ加工用の軸芯を、焼結軸部
に設定する構成である。故に、焼結工程で焼結軸部に反
り曲りが生じる場合であっても、焼結軸部の反り曲りに
影響されず、焼結軸部仕上げ加工用の軸芯を設定するこ
とができる。[Operation of the Invention] In the manufacturing method of the present invention, the axis for finishing the sintered shaft is set in the sintered shaft, with the center of rotation of the sintered wheel as a reference. Therefore, even if the sintered shaft portion is warped during the sintering process, the shaft center for finishing the sintered shaft portion can be set without being affected by the warpage of the sintered shaft portion.

本願発明では、上記した仕上げ加工用の軸芯を加工基準
として焼結軸部を正規の寸法に仕上げる構成であるから
、焼結軸部の反り曲りにほとんど影響をうけることなく
焼結軸部を仕上げることができる。In the present invention, the sintered shaft part is finished to regular dimensions using the above-mentioned shaft center for finishing processing as a processing reference, so the sintered shaft part is almost unaffected by warpage of the sintered shaft part. can be finished.

［発明の効果］ 本願発明の製造方法においては、前述したように焼結軸
部の反り曲りにほとんど影響をうけることなく、焼結４
？１１部を仕上げることができる。故に、従来焼結ホイ
ール部に生じたアンバランスを極力抑１ｌＩＩＪするこ
とができる。従って、その後の修正作業も無くし得るか
、大幅に削減することができる。[Effects of the Invention] As described above, in the manufacturing method of the present invention, the sintering process is almost unaffected by the warpage of the sintered shaft.
? I can finish part 11. Therefore, the unbalance that has conventionally occurred in the sintered wheel portion can be suppressed as much as possible. Therefore, subsequent correction work can also be eliminated or significantly reduced.

更に、従来化じていた焼結ホイール部の首振り、回転ム
ラ、タービンホイールの空力性能の低下といった問題を
極力抑制することができる。Furthermore, conventional problems such as wobbling of the sintered wheel portion, uneven rotation, and deterioration of the aerodynamic performance of the turbine wheel can be suppressed as much as possible.

［実施例］ 第１図及び第２図は、本願発明の詳細な説明するための
図である。[Example] FIGS. 1 and 2 are diagrams for explaining the present invention in detail.

成形工程では、従来と同様に、未焼結タービンホイール
３σを窒化珪素（Ｓｉ３Ｎ４）から成形する。未焼結タ
ービンホイール３ｏは、従来と同様に、未焼結軸部１０
と、該未焼結軸部１０と一体的に形成された未焼結ホイ
ール部２０とをもつ。In the forming process, the unsintered turbine wheel 3σ is formed from silicon nitride (Si3N4) as in the conventional method. The unsintered turbine wheel 3o has an unsintered shaft portion 10 as in the conventional case.
and an unsintered wheel portion 20 integrally formed with the unsintered shaft portion 10.

未焼結ホイール部２０は、ハブ２１と、ハブ２１に形成
された翼２２とをもつ。The green wheel portion 20 has a hub 21 and wings 22 formed on the hub 21.

次に従来と同様に、先づ未焼結軸部の加工基準用に未焼
結軸部１ｏの端部とハブ２１の端部にけシタ穴を加工創
設する。その上で未焼結軸部１０の端部のセンター穴に
支持具Ｐを固定するど共に、ハブ２１の端部のセンター
穴に支持具Ｑを固定し、その状態で未焼結軸部１０の外
周面に荒加工を行なう。　焼結工程では、従来と同様に
、未焼結タービンホイール３０を焼結し、これにより焼
結軸部１０ａと焼結ホイール部２０ａをもつ焼結タービ
ンホイール３０ａを形成する。本例の焼結は、１７５０
℃で４時間行なった。焼結軸部１０ａは、焼結の影響を
うけて、第１図に示すように焼結軸部１０ａの付（プ根
部分Ｐ１を起点として反り曲がるおそれがある。第１図
において一点鎖線Ｒ１は、そり曲った焼結軸部１０ａの
中心線を示ず。Next, in the same manner as in the prior art, a hole is first machined in the end of the unsintered shaft 1o and the end of the hub 21 for the processing reference of the unsintered shaft. Then, the support P is fixed to the center hole at the end of the unsintered shaft 10, and the support Q is fixed to the center hole at the end of the hub 21, and in this state, the unsintered shaft 10 is fixed. Perform rough machining on the outer peripheral surface. In the sintering step, the unsintered turbine wheel 30 is sintered as in the conventional method, thereby forming a sintered turbine wheel 30a having a sintered shaft portion 10a and a sintered wheel portion 20a. The sintering in this example is 1750
It was carried out for 4 hours at ℃. Under the influence of sintering, the sintered shaft portion 10a may warp starting from the root portion P1 of the sintered shaft portion 10a as shown in FIG. 1. In FIG. does not indicate the center line of the curved sintered shaft portion 10a.

本例を特徴づける軸芯設定工程では、焼結ホイール部２
０ａの回転中心Ｘを基準として焼結軸部仕上げ加工用の
軸芯Ｙを、焼結軸部１０ａに設定づ−る。この工程は本
例の場合、以下のようにして行う。即ち、前の成形工程
で用いた焼結ホイール部の先端のＣシタ−穴４Ｑに支持
具Ｑを固定すると共に、先端が平坦な支持具Ｓをハブ２
１の背面２４に密着固定する。ここで支持具Ｓは、全周
当りもしくは円周１１．：？Ｕ数個の当たり而を形成し
、支持具Ｑを中心に同心円的に設（プられている。上記
のようにすれば第１図に示すように焼結ホイール部２０
ａのバブ２１の背面２４は鉛直方向となる。そして、焼
結ホイール部２０ａの回転中心Ｘは、焼結ホイール部２
０ａのハブ２１先端のセンター穴４０の中心点を通り、
ハブ２１の背面２４に垂直な線として規定される。In the axis setting process that characterizes this example, the sintered wheel portion 2
An axis Y for finishing the sintered shaft part is set on the sintered shaft part 10a with reference to the rotation center X of 0a. In this example, this step is performed as follows. That is, the support Q is fixed to the C seat hole 4Q at the tip of the sintered wheel used in the previous forming process, and the support S with a flat tip is attached to the hub 2.
It is tightly fixed to the back surface 24 of 1. Here, the support S is per circumference or 11. :? Several contacts U are formed and are placed concentrically around the support Q. If the above procedure is performed, the sintered wheel portion 20 will be formed as shown in FIG.
The back surface 24 of the bubble 21 in a is vertical. The rotation center X of the sintered wheel portion 20a is the center of rotation of the sintered wheel portion 20a.
Pass through the center point of the center hole 40 at the tip of the hub 21 of 0a,
It is defined as a line perpendicular to the back surface 24 of the hub 21.

ところで、第１図において５０は軸芯加工具の１例であ
る。これは、焼結ホイール部２０ａの回転中心Ｘと同軸
的に保持され、該回転中心Ｘと同軸的に回転するもので
ある。この軸芯加工具５０を矢印Ａ方向に焼結ホイール
部２０ａの回転中心Ｘにそって作動させる。すると、こ
の軸芯加工具５０によって焼結ホイール部２０ａの先端
の外周端面は、第１図に示すように円錘台状に切削せら
れ、円錘台状の切削部５１が形成される。当然のことな
がら円錘台状の形成の為の加工はこの例の他にもいろい
ろな方法が考えられる。次に、支持具Ｑと同軸的にある
支持具Ｔを作動させて、孔５２を有する支持具Ｔによっ
て切削部５１を固定Ｊ。By the way, in FIG. 1, 50 is an example of a shaft processing tool. This is held coaxially with the rotation center X of the sintering wheel portion 20a and rotates coaxially with the rotation center X. This core processing tool 50 is operated in the direction of arrow A along the rotation center X of the sintered wheel portion 20a. Then, the outer circumferential end surface of the tip of the sintered wheel portion 20a is cut into a truncated cone shape as shown in FIG. 1 by the shaft processing tool 50, thereby forming a truncated cone shaped cutting portion 51. Naturally, various methods other than this example can be considered for processing to form a truncated cone shape. Next, a support T coaxial with the support Q is operated, and the cutting portion 51 is fixed by the support T having the hole 52.

る。Ru.

このように支持具Ｑと支持具Ｔとによって固定すれば、
該焼結軸部仕上げ加工用の軸芯Ｙは、焼結ホイール部２
０ａの回転中心Ｘの延長線上に設定される。ここで、焼
結軸部１０ａが反り曲っている場合であっても、軸芯Ｙ
は、焼結ホイール部２０ａの回転中心Ｘと一直線状とな
る。If it is fixed with the support Q and the support T in this way,
The shaft center Y for finishing the sintered shaft portion is the sintered wheel portion 2
It is set on an extension of the rotation center X of 0a. Here, even if the sintered shaft portion 10a is warped, the shaft center Y
is in line with the rotation center X of the sintered wheel portion 20a.

仕上げ工程では、＋７ｆｆ述した様に焼結ホイール部２
０ａの回転中心×と、焼結軸部仕上げ加工（、ｌの軸芯
Ｙとを一直線状にした状態で、図示しない仕上げ工具に
よって焼結軸部１０ａの外周面を所定の寸法に仕上げる
。In the finishing process, as mentioned above, the sintered wheel part 2
With the rotation center x of 0a and the axis Y of the sintered shaft finishing process (,l) aligned, the outer peripheral surface of the sintered shaft 10a is finished to a predetermined dimension using a finishing tool (not shown).

このよう４ｒ製造方法によれば、焼結ホイール部２０ａ
の回転中心Ｘに対して、また焼結（軸部仕上げ加工用の
軸芯Ｙに対して、焼結ホイール部２０ａのバブ２１の背
面２４＠垂直方向になしうる。According to this 4r manufacturing method, the sintered wheel portion 20a
It can be performed vertically on the back surface 24 of the bub 21 of the sintering wheel portion 20a with respect to the rotation center

上記のような製造方法で製造したタービンホイールを、
第３図に示すように金属製の駆動軸５の孔部５ａに装ル
すれば、焼結ホイール部２０ａのハブ２１の背面２４は
、駆動軸５の軸芯に対して垂直となる。従って本例にお
いては、第６図に示す従メことは５＋、Ｈなり、焼結ホ
イール部２０ａのハブ２１の背面２４の傾斜が押えられ
るため、バランス発生を抑制する。このため、従来と異
なりその後の修正作業が不要となるか大幅に削減するこ
とができる。駆動時に首振り、回転ムラといった問題の
発生を抑制することができ、延いては、ターごンホイー
ルの空力性能の低下といった問題の発生を抑制すること
ができる。Turbine wheels manufactured using the manufacturing method described above,
When inserted into the hole 5a of the metal drive shaft 5 as shown in FIG. 3, the back surface 24 of the hub 21 of the sintered wheel portion 20a becomes perpendicular to the axis of the drive shaft 5. Therefore, in this example, the subordinate wheel shown in FIG. 6 is 5+, H, and the inclination of the back surface 24 of the hub 21 of the sintered wheel portion 20a is suppressed, thereby suppressing the occurrence of balance. Therefore, unlike the conventional method, subsequent correction work becomes unnecessary or can be significantly reduced. It is possible to suppress the occurrence of problems such as oscillation and uneven rotation during driving, and by extension, it is possible to suppress the occurrence of problems such as a decrease in the aerodynamic performance of the targon wheel.

尚本例では、成形工程で焼結軸部１０ａの先端に形成し
たセンター穴４１がのこる。このセンター穴４１の軸芯
Ｙに対する偏心■によって、焼結軸部１０ａの反り曲り
伍を推定することができる。In this example, the center hole 41 formed at the tip of the sintered shaft portion 10a during the molding process remains. The degree of warpage of the sintered shaft portion 10a can be estimated from the eccentricity (2) of the center hole 41 with respect to the axis Y.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図〜第３図は本願発明の一実施例を示し、第１図は
軸芯設定工程を示す側面図、第２図は仕上げ工程を示す
側面図、第３図はタービンホイールを回転軸に組み込ん
だ状態を一部破断して示す側面図である。 第４図、第５図は従来の製造方法を示す図であり、第４
図は成形工程を示す側面図、第５図は従来の焼結タービ
ンホイールを支持具で固定している状態を示す側面図、
第６図は製造した従来のタービンホイールを駆動軸に組
み込／νでいる状態を一部破断して承り側面図、第７図
はターボチャージャに従来のタービンホイールを組み込
んだ状態を拡大して示ヅ側面図である。 図中、１０ａは焼結軸部、２０ａは焼結ホイール部、３
０ａは焼結タービンホイール、Ｘは焼結タービンホイー
ルの回転中心、Ｙは仕上げ加工用の軸芯を示す。Figures 1 to 3 show one embodiment of the present invention, with Figure 1 being a side view showing the shaft center setting process, Figure 2 being a side view showing the finishing process, and Figure 3 showing the turbine wheel as the rotation axis. FIG. 3 is a partially cutaway side view showing the state in which the device is assembled into the device. FIG. 4 and FIG. 5 are diagrams showing the conventional manufacturing method.
The figure is a side view showing the forming process, and Figure 5 is a side view showing a conventional sintered turbine wheel fixed with a support.
Figure 6 is a partially cutaway side view of a manufactured conventional turbine wheel assembled into a drive shaft, and Figure 7 is an enlarged view of a conventional turbine wheel assembled into a turbocharger. FIG. In the figure, 10a is a sintered shaft part, 20a is a sintered wheel part, 3
0a indicates the sintered turbine wheel, X indicates the rotation center of the sintered turbine wheel, and Y indicates the axis for finishing processing.

Claims (5)

【特許請求の範囲】[Claims] （１）セラミックスで、正規の寸法よりも厚肉とした未
焼結軸部と該未焼結軸部と一体的に形成された未焼結ホ
イール部とをもつ未焼結タービンホィールを成形する成
形工程と、 前記未焼結タービンホイールを焼結し、焼結軸部と焼結
ホイール部とをもつ焼結タービンホイールを得る焼結工
程と、 前記焼結ホイール部の回転中心を基準として、焼結軸部
仕上げ加工用の軸芯を、前記焼結軸部に設定する軸芯設
定工程と、 前記仕上げ加工用の軸芯を加工基準として前記焼結軸部
を正規の寸法に仕上げる仕上工程とを順に実施してなる
セラミックスタービンホイールの製造方法。(1) Molding an unsintered turbine wheel made of ceramics, which has an unsintered shaft portion that is thicker than normal dimensions and an unsintered wheel portion that is integrally formed with the unsintered shaft portion. a sintering step of sintering the unsintered turbine wheel to obtain a sintered turbine wheel having a sintered shaft portion and a sintered wheel portion; a rotation center of the sintered wheel portion as a reference; A shaft center setting step of setting a shaft center for finishing processing of the sintered shaft portion on the sintered shaft portion; and a finishing step of finishing the sintered shaft portion to regular dimensions using the shaft center for finishing processing as a processing reference. A method for manufacturing a ceramic turbine wheel by sequentially carrying out the following steps. （２）焼結ホイール部の回転中心は、該焼結ホイール部
のハブ先端の中心点を通り、該ハブの背面に垂直な線と
して規定される特許請求の範囲第１項記載のセラミック
スタービンホイールの製造方法。(2) The ceramic turbine wheel according to claim 1, wherein the rotation center of the sintered wheel portion is defined as a line passing through the center point of the tip of the hub of the sintered wheel portion and perpendicular to the back surface of the hub. manufacturing method. （３）仕上げ加工用の軸芯は、焼結ホイール部の回転中
心と同軸的であり該回転中心と同軸的に回転する軸芯加
工工具で、焼結軸部の先端を切削もしくは研削（以降記
載は切削で代表する）することにより形成する特許請求
の範囲第１項記載のセラミックスタービンホイールの製
造方法。(3) The shaft core for finishing is coaxial with the rotation center of the sintered wheel, and the tip of the sintered shaft is cut or ground (hereinafter referred to as The method for manufacturing a ceramic turbine wheel according to claim 1, wherein the ceramic turbine wheel is formed by cutting. （４）焼結軸部の先端の切削は、該焼結軸部の先端の外
周端面を円錘台状に切削することによりなされる特許請
求の範囲第３項記載の製造方法。(4) The manufacturing method according to claim 3, wherein the cutting of the tip of the sintered shaft is performed by cutting the outer peripheral end surface of the tip of the sintered shaft into a truncated cone shape. （５）焼結軸部の先端の切削は、該焼結軸部の先端をセ
ンター穴状に切削することによりなされる特許請求の範
囲第３項記載のセラミックスタービンホイールの製造方
法。(5) The method for manufacturing a ceramic turbine wheel according to claim 3, wherein the cutting of the tip of the sintered shaft is performed by cutting the tip of the sintered shaft into a center hole shape.
JP17479784A 1984-08-22 1984-08-22 Method for manufacturing ceramic star bin wheel Expired - Lifetime JPH0635806B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17479784A JPH0635806B2 (en) 1984-08-22 1984-08-22 Method for manufacturing ceramic star bin wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17479784A JPH0635806B2 (en) 1984-08-22 1984-08-22 Method for manufacturing ceramic star bin wheel

Publications (2)

Publication Number Publication Date
JPS6153401A true JPS6153401A (en) 1986-03-17
JPH0635806B2 JPH0635806B2 (en) 1994-05-11

Family

ID=15984832

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17479784A Expired - Lifetime JPH0635806B2 (en) 1984-08-22 1984-08-22 Method for manufacturing ceramic star bin wheel

Country Status (1)

Country Link
JP (1) JPH0635806B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5178519A (en) * 1990-01-17 1993-01-12 Ngk Insulators, Ltd. Ceramic turbo charger rotor and method of manufacturing the same
JPH0650101A (en) * 1992-07-28 1994-02-22 Kyocera Corp Ceramic rotor
FR2890497A1 (en) * 2005-09-02 2007-03-09 Optelec Sa ROTOR ENGINE MADE OF A METAL POWDER
JP2009293417A (en) * 2008-06-03 2009-12-17 Seiko Epson Corp Nozzle vane manufacturing method, nozzle vane, variable nozzle mechanism, and turbocharger

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5178519A (en) * 1990-01-17 1993-01-12 Ngk Insulators, Ltd. Ceramic turbo charger rotor and method of manufacturing the same
JPH0650101A (en) * 1992-07-28 1994-02-22 Kyocera Corp Ceramic rotor
FR2890497A1 (en) * 2005-09-02 2007-03-09 Optelec Sa ROTOR ENGINE MADE OF A METAL POWDER
JP2009293417A (en) * 2008-06-03 2009-12-17 Seiko Epson Corp Nozzle vane manufacturing method, nozzle vane, variable nozzle mechanism, and turbocharger

Also Published As

Publication number Publication date
JPH0635806B2 (en) 1994-05-11

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