JPH068803B2 - Method for removing short-lived ceramic contact parts and inspection device for ceramic rolling contact parts - Google Patents
Method for removing short-lived ceramic contact parts and inspection device for ceramic rolling contact partsInfo
- Publication number
- JPH068803B2 JPH068803B2 JP61178357A JP17835786A JPH068803B2 JP H068803 B2 JPH068803 B2 JP H068803B2 JP 61178357 A JP61178357 A JP 61178357A JP 17835786 A JP17835786 A JP 17835786A JP H068803 B2 JPH068803 B2 JP H068803B2
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- shaft
- rolling
- bearing
- contact parts
- 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 - Lifetime
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】 （イ）発明の目的 ［産業上の利用分野］ この発明はセラミック転がり軸受その他の転がり接触部
品の短寿命品の除去方法及び、その除去方法において使
用する検査装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Object of the invention [Industrial field of application] The present invention relates to a method for removing short-lived ceramic rolling bearings and other rolling contact parts, and an inspection device used in the method. Is.
このような転がり接触部品の短寿命品の除去方法及び検
査装置はセラミック機械部品メーカー及びユーザーにお
ける品質保証検査に使用することができる。Such a method and an inspection device for removing a short-life product of rolling contact parts can be used for quality assurance inspection by ceramic machine parts manufacturers and users.
［従来の技術］ 転がり軸受の寿命を規定する特性の１つとして、転がり
疲れ寿命がある。しかるにこの転がり軸受の転がり疲れ
寿命は第６図に示す如く非常に大きくばらつき、その分
布は第７図に示す如きワイブル分布に従うことは知られ
ている。このように転がり疲れ寿命に大きなばらつきが
生じる原因は、転がり軸受においては、第８図に砂点で
示すように、内輪６、外輪８のうち、玉７が転動する軌
道面及び直下の表層部、特に、玉７と接触している軌道
面の特定箇所等の部品のごく一部分が高い接触応力の繰
返しを受けるためである。一般の鋼製軸受では接触応力
を受ける体積中に材料欠陥や不純物が存在すると、その
部分で応力集中が生じ、クラックが発生、伝播して表面
剥離へと進展する。この現象を利用して、軸受の健全性
や寿命を検査する技術が従来から開発されている。しか
しこれらの検査技術は一般鋼製軸受に関するものであ
る。[Prior Art] One of the characteristics that defines the life of a rolling bearing is the rolling fatigue life. However, it is known that the rolling fatigue life of this rolling bearing greatly varies as shown in FIG. 6, and its distribution follows the Weibull distribution as shown in FIG. The cause of such large variations in rolling fatigue life is that in rolling bearings, as indicated by the sand dots in FIG. 8, of the inner ring 6 and the outer ring 8, the raceway surface on which the balls 7 roll and the surface layer immediately below it. This is because a portion, particularly, a very small part of the component such as a specific portion of the raceway surface which is in contact with the ball 7 is repeatedly subjected to high contact stress. In a general steel bearing, if a material defect or an impurity is present in a volume subjected to contact stress, stress concentration occurs in that portion, a crack is generated and propagates, and progresses to surface peeling. Utilizing this phenomenon, a technique for inspecting the soundness and life of the bearing has been conventionally developed. However, these inspection techniques are for general steel bearings.
ところで、セラミックは金属材料に比べ高温強度が大き
いことから、近来、高温領域で使用する転がり軸受をセ
ラミックスで構成することが考えられている。By the way, since ceramics have higher strength at high temperatures than metal materials, it has been recently considered that rolling bearings used in a high temperature region should be made of ceramics.
［発明が解決しようとする問題点］ このセラミック転がり軸受についても転がり疲れ寿命を
検査する必要があるが、セラミック転がり軸受の転がり
疲労のメカニズムは一般鋼製のそれとは異なっており、
前述の一般鋼製の軸受についての検査技術をそのまま使
用することができない。すなわち、セラミック軸受では
第３図に示すように軌道輪１６の軌道面１７に玉７が荷
重Ｗによって接触した状態で転動する場合に、接触面１
８の近傍にヘルツクラック２１が発生し、そのヘルツク
ラック２１が起点となって表面剥離へと進展する。これ
がセラミック軸受における転がり疲れ寿命の原因であ
る。[Problems to be Solved by the Invention] It is necessary to inspect the rolling fatigue life of this ceramic rolling bearing, but the mechanism of rolling fatigue of the ceramic rolling bearing is different from that of general steel,
The above-mentioned inspection technology for bearings made of general steel cannot be used as it is. That is, in the ceramic bearing, as shown in FIG. 3, when the ball 7 rolls in contact with the raceway surface 17 of the bearing ring 16 under the load W, the contact surface 1
A Hertz crack 21 is generated in the vicinity of 8, and the Hertz crack 21 serves as a starting point and progresses to surface peeling. This is the cause of rolling fatigue life in ceramic bearings.
しかるに、このセラミック軸受における転がり疲れ寿命
を検出する技術は未だ確立されていない。However, a technique for detecting the rolling fatigue life of this ceramic bearing has not been established yet.
一方、第４図に示すように、セラミック軸受における転
がり寿命を起す荷重は同一部品であっても、個々に製品
間或いは材料のロット間で大きなばらつきがあり、これ
がセラミック転がり軸受の信頼性を低下させる原因とな
っている。On the other hand, as shown in FIG. 4, even if the load that causes the rolling life of the ceramic bearing is the same, even if the load is the same, there is a large variation between products or between lots of materials, which reduces the reliability of the ceramic rolling bearing. Is causing
この発明は上記の如き事情に鑑みてなされたものであっ
て、セラミック転がり軸受など転がり接触する部品の接
触部並びにその近傍で低いヘルツクラック荷重発生点を
有する部品を確実に検出し、かつ除去することにより、
部品の信頼性を向上させることができ、かつ測定法が簡
単なセラミック転がり接触部品の短寿命品の除去方法及
び検査装置を提供することを目的とするものである。The present invention has been made in view of the circumstances as described above, and reliably detects and removes a contact portion of a rolling contact component such as a ceramic rolling bearing and a component having a low Hertz crack load generation point in the vicinity thereof. By
It is an object of the present invention to provide a method for removing a short-lived ceramic rolling contact component and a testing device which can improve the reliability of the component and whose measurement method is simple.
（ロ）発明の構成 ［問題点を解決するための手段］ この目的に対応して、この発明のセラミック接触部品の
短寿命品の除去方法は、被検体であるセラミック製軌道
輪に対し、鋼製の転子と軌道輪を組み合わせて転がり軸
受を構成するとともに、前記被検体である前記セラミッ
ク製軌道輪上に設定荷重で前記転子を接触させた状態で
前記転子を前記セラミック製軌道輪上を転動させ、ＡＥ
が発生した前記セラミック製軌道輪を検出して除去する
ことを特徴としている。(B) Structure of the Invention [Means for Solving the Problems] To solve this problem, a method for removing a short-life product of a ceramic contact component according to the present invention is a method for removing a steel bearing ring made of steel from a specimen. A rolling bearing is formed by combining a roller and a bearing ring made of steel, and the roller is made to contact the ceramic bearing ring on the ceramic bearing ring which is the subject under a set load. Roll over, AE
Is detected and removed.
また、この発明のセラミック転がり接触部品の検査装置
は、軸と前記軸の外側に前記軸と同心状に位置するハウ
ジングとを相対回転可能に配設し、前記軸と前記ハウジ
ングとの間に鋼製転子を被検体となるセラミック製軌道
輪及び鋼製軌道輪上を転動可能に保持し、前記軸及び前
記ハウジングのうちの一方を回転側としてこれに被検体
である前記セラミック製軌道輪を取付け、前記軸及び前
記ハウジングのうちの他方を固定側としてこれに前記鋼
製軌道輪を取付けるとともにＡＥ検出素子を取付けてな
ることを特徴としている。Further, in the inspection device for ceramic rolling contact parts of the present invention, a shaft and a housing located concentrically with the shaft are arranged on the outside of the shaft so as to be rotatable relative to each other, and a steel is provided between the shaft and the housing. The ceramic bearing ring that holds the manufactured trochanter rotatably on a ceramic bearing ring and a steel bearing ring that are the subject, and has one of the shaft and the housing as the rotation side, which is the subject. Is attached, the other side of the shaft and the housing is used as a fixed side, the steel bearing ring is attached to this, and an AE detection element is attached.
以下、この発明のセラミック接触部品の短寿命品の除去
方法をそれに使用するセラミック転がり接触部品の検査
装置を示す図面とともに説明する。Hereinafter, a method for removing a short-lived ceramic contact component of the present invention will be described with reference to the drawings showing an inspection device for a ceramic rolling contact component used therein.
第１図において、１は検査装置であり、検査装置１は軸
２とハウジング３とを備え、軸２とハウジング３との間
に被検体４が配設されている。被検体４はこの実施例で
は転がり軸受５の内輪である。すなわち、軸受５は内輪
６、玉７及び外輪８を備えている。内輪６はセラミック
ス製で、玉７及び外輪８は鋼製で構成されている。In FIG. 1, reference numeral 1 is an inspection device, and the inspection device 1 includes a shaft 2 and a housing 3, and a subject 4 is disposed between the shaft 2 and the housing 3. The subject 4 is the inner ring of the rolling bearing 5 in this embodiment. That is, the bearing 5 includes an inner ring 6, balls 7 and an outer ring 8. The inner ring 6 is made of ceramics, and the balls 7 and the outer ring 8 are made of steel.
軸２は回転軸であり、内輪６は軸２に嵌合固着していて
軸２とともに回転する。外輪８はハウジング３の内側に
固定されており、ハウジング３と共に固定である。The shaft 2 is a rotating shaft, and the inner ring 6 is fitted and fixed to the shaft 2 and rotates together with the shaft 2. The outer ring 8 is fixed inside the housing 3, and is fixed together with the housing 3.
玉７は保持器（図示せず）に保持されて内輪６と外輪８
との間に位置している。玉７はハウジング３に作用する
試験荷重Ｗにより内輪６及び外輪８の軌道面１１，１２
に圧接された状態で軌道面１１，１２上である。従っ
て、内輪６及び外輪８は軌道輪である。The balls 7 are held by a retainer (not shown) so that the inner ring 6 and the outer ring 8 are
It is located between and. The balls 7 are driven by the test load W acting on the housing 3 so that the raceways 11 and 12 of the inner ring 6 and the outer ring 8 are
On the raceway surfaces 11 and 12 in a state of being pressed against. Therefore, the inner ring 6 and the outer ring 8 are race rings.
ハウジング３にはＡＥ検出端子１３が取付けられてい
る。ＡＥ検出端子１３はＡＥ変換子１４を備え、ＡＥ変
換子１４はＡＥ測定装置１５に接続している。An AE detection terminal 13 is attached to the housing 3. The AE detection terminal 13 includes an AE converter 14, and the AE converter 14 is connected to an AE measuring device 15.
ＡＥ測定装置１５としては昭和５８年特許第１０８１３
５号（特開昭６０−３５７号）に示されたものを使用す
ることができる。As the AE measuring device 15, 1983 patent No. 10813
No. 5 (JP-A-60-357) can be used.
［作用］ 次に以上のように構成されたセラミック転がり接触部品
の検査装置を使用して内輪６のヘルツクラックを検出す
る操作について説明する。[Operation] Next, an operation for detecting the Hertz crack of the inner ring 6 by using the ceramic rolling contact component inspection device configured as described above will be described.
第１図に示す検査装置１において、軸２を回転させると
被検体である内輪６が回転し、その回転が玉７に伝達さ
れ、玉７は固定位置にある外輪８の軌道面１２上で転動
し、軌道面１１及び１２に接触応力が発生する。もし軌
道面１１に材料欠陥や不純物が存在すると、第３図に示
すように、接触部分の近傍にヘルツクラック２１が発生
し、このヘルツクラック２１が起点となって表面剥離へ
進展する。ヘルツクラック２１の発生及び進行はＡＥを
発生する。ＡＥ（Acoustic Emission）は材料の破壊に
よって発生する一種の音響であり、このＡＥは玉７及び
外輪８からハウジング３に伝達されＡＥ検出端子１３で
検出されたＡＥ測定装置１５によって測定される。In the inspection device 1 shown in FIG. 1, when the shaft 2 is rotated, the inner ring 6 that is the subject is rotated, and the rotation is transmitted to the ball 7, which is on the raceway surface 12 of the outer ring 8 in the fixed position. Rolling occurs and contact stress is generated on the raceway surfaces 11 and 12. If there are material defects and impurities on the raceway surface 11, as shown in FIG. 3, a Hertz crack 21 is generated in the vicinity of the contact portion, and the Hertz crack 21 serves as a starting point and progresses to surface peeling. The occurrence and progress of the Hertz crack 21 causes AE. AE (Acoustic Emission) is a kind of sound generated by the destruction of the material, and this AE is transmitted from the ball 7 and the outer ring 8 to the housing 3 and measured by the AE measuring device 15 detected by the AE detection terminal 13.
このヘルツクラック発生荷重はＱ１であったりＱ２であ
ったり、更にはそれ以外の値であったりして、第４図に
示す部品或いは材料のロット間で大きなばらつきがある
が、Ｑ１，Ｑ２或いはその他の設定荷重の大きさによ
り、ＡＥ発生品を排除することにより軸受の寿命は延長
し、かつ、第５図に示すように、そのばらつきも小さく
なり、軸受の信頼性が向上する。The Hertz cracking load is Q 1 , Q 2 , or any other value, and there is a large variation between the lots of parts or materials shown in FIG. 4, but Q 1 , Depending on the magnitude of Q 2 or other set load, the life of the bearing is extended by eliminating the products that generate AE, and as shown in FIG. 5, the variation is also small and the reliability of the bearing is improved. .
［他の実施例］ 次に、被検体４が外輪である場合には、第２図に示すよ
うに、軸２を固有側とし、ハウジング３の回転側とし、
ＡＥ検出端子１３を軸２に取付けることによって、外輪
８のヘルツクラック発生にともなうＡＥを検出する。[Other Embodiments] Next, when the subject 4 is an outer ring, as shown in FIG. 2, the shaft 2 is set to the proper side and the housing 3 is set to the rotation side.
By attaching the AE detection terminal 13 to the shaft 2, the AE that accompanies the Hertz crack of the outer ring 8 is detected.
（ハ）発明の効果 以上の説明から明らかな通りこの発明によれば、ヘルツ
クラックの発生荷重をＡＥの測定により精度高く測定す
ることができるので、セラミック転がり軸受等転がり接
触する部品の接触部並びにその近傍で低いヘルツクラッ
ク荷重発生点を有する部品を確実に検出し、かつ除去す
ることにより、部品の信頼性を向上させることができ、
かつ測定法が簡単なセラミック転がり接触部品の短寿命
品の除去方法及び検査装置を得ることができる。(C) Effects of the Invention As is clear from the above description, according to the present invention, the load generated by Hertz cracks can be accurately measured by measuring the AE, so that the contact parts of the rolling contact parts such as ceramic rolling bearings and By reliably detecting and removing a component having a low Hertz crack load generation point in the vicinity thereof, the reliability of the component can be improved,
In addition, it is possible to obtain a method and an inspection device for removing a short-life ceramic rolling contact component whose measurement method is simple.
第１図はこの発明の一実施例に係わる検査装置を示す縦
断面説明図、第２図はこの発明の他の実施例に係わる検
査装置を示す縦断面説明図、第３図はセラミック部品の
転がり疲労破損の発生メカニズムを示す横断面説明図、
第４図はヘルツクラックの発生荷重と発生度数を示すグ
ラフ、第５図はセラミック軸受の寿命と累積破損確率と
設定荷重の関係を示すグラフ、第６図は転がり疲れ寿命
のばらつきを示すグラフ、第７図はセラミック軸受の転
がり疲労寿命のワイブル分布を示すグラフ、及び第８図
は転がり軸受の応力を受ける部分を示す横断面説明図で
ある。 １…検査装置 ２…軸 ３…ハウジング ４…被検体 ５…軸受 ６…内輪 ７…玉 ８…外輪 Ｗ…試験荷重 １１…軌道面 １２…軌道面 １３…ＡＥ検出端子 １４…ＡＥ変換
１５…ＡＥ測定装置FIG. 1 is a vertical sectional view showing an inspection apparatus according to an embodiment of the present invention, FIG. 2 is a vertical sectional explanatory view showing an inspection apparatus according to another embodiment of the present invention, and FIG. Cross sectional explanatory view showing the mechanism of rolling fatigue damage,
FIG. 4 is a graph showing the load and frequency of occurrence of Hertz cracks, FIG. 5 is a graph showing the relationship between the life of the ceramic bearing, the cumulative damage probability and the set load, and FIG. 6 is a graph showing the variation in rolling fatigue life, FIG. 7 is a graph showing the Weibull distribution of the rolling fatigue life of the ceramic bearing, and FIG. 8 is a cross-sectional explanatory view showing a portion of the rolling bearing which receives stress. 1 ... Inspection device 2 ... Shaft 3 ... Housing 4 ... Subject 5 ... Bearing 6 ... Inner ring 7 ... Ball 8 ... Outer ring W ... Test load 11 ... Raceway surface 12 ... Raceway surface 13 ... AE detection terminal 14 ... AE conversion
15 ... AE measuring device
フロントページの続き (72)発明者 竹林 博明 大阪府大阪市南区鰻谷西之町２番地 光洋 精工株式会社内 審査官 桜井 康平 (56)参考文献 特開 昭58−97654（ＪＰ，Ａ) 特開 昭53−43588（ＪＰ，Ａ) 特開 昭55−96448（ＪＰ，Ａ)Front page continuation (72) Inventor Hiroaki Takebayashi, No. 2 Nishinomachi Nishinomachi, Minami-ku, Osaka City, Osaka Prefecture Koyo Seiko Co., Ltd. Kohei Sakurai (56) Reference JP-A-58-97654 (JP, A) 53-43588 (JP, A) JP-A-55-96448 (JP, A)
Claims (2)
鋼製の転子と軌道輪を組み合わせて転がり軸受を構成す
るとともに、前記被検体である前記セラミック製軌道輪
上に設定荷重で前記転子を接触させた状態で前記転子を
前記セラミック製軌道輪上を転動させ、ＡＥが発生した
前記セラミック製軌道輪を検出して除去することを特徴
とするセラミック接触部品の短寿命品の除去方法1. A ceramic bearing ring which is a subject,
A rolling bearing is constructed by combining a steel roller and a raceway, and the ceramic raceway is formed by contacting the rotor with a set load on the ceramic raceway ring that is the subject. A method for removing short-lived ceramic contact parts, characterized by rolling on a wheel and detecting and removing the ceramic bearing ring in which AE has occurred.
するハウジングとを相対回転可能に配設し、前記軸と前
記ハウジングとの間に鋼製転子を被検体となるセラミッ
ク製軌道輪及び鋼製軌道輪上を転動可能に保持し、前記
軸及び前記ハウジングのうちの一方を回転側としてこれ
に被検体である前記セラミック製軌道輪を取付け、前記
軸及び前記ハウジングのうちの他方を固定側としてこれ
に前記鋼製軌道輪を取付けるとともにＡＥ検出素子を取
付けてなることを特徴とするセラミック転がり接触部品
の検査装置2. A ceramic comprising a shaft and a housing located concentrically with the shaft on the outer side of the shaft so as to be rotatable relative to each other, and a steel trochanter being a test object between the shaft and the housing. A ball bearing made of steel and a steel bearing ring are rotatably held, and one of the shaft and the housing is used as a rotation side, and the ceramic bearing ring which is the subject is attached to the one of the shaft and the housing. An apparatus for inspecting a ceramic rolling contact part, characterized in that the other of them is used as a fixed side, and the steel raceway is attached to this and an AE detection element is attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61178357A JPH068803B2 (en) | 1986-07-29 | 1986-07-29 | Method for removing short-lived ceramic contact parts and inspection device for ceramic rolling contact parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61178357A JPH068803B2 (en) | 1986-07-29 | 1986-07-29 | Method for removing short-lived ceramic contact parts and inspection device for ceramic rolling contact parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6336141A JPS6336141A (en) | 1988-02-16 |
| JPH068803B2 true JPH068803B2 (en) | 1994-02-02 |
Family
ID=16047075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61178357A Expired - Lifetime JPH068803B2 (en) | 1986-07-29 | 1986-07-29 | Method for removing short-lived ceramic contact parts and inspection device for ceramic rolling contact parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH068803B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2582287B2 (en) * | 1988-11-15 | 1997-02-19 | 三菱電機株式会社 | Design method of semiconductor integrated circuit device |
| FR2977646B1 (en) * | 2011-07-04 | 2014-05-16 | Ntn Snr Roulements | INSTRUMENTATED BEARING BOX WITH ACOUSTIC TRANSMITTER |
-
1986
- 1986-07-29 JP JP61178357A patent/JPH068803B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6336141A (en) | 1988-02-16 |
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