JPS6237159Y2 - - Google Patents
Info
- Publication number
- JPS6237159Y2 JPS6237159Y2 JP15073582U JP15073582U JPS6237159Y2 JP S6237159 Y2 JPS6237159 Y2 JP S6237159Y2 JP 15073582 U JP15073582 U JP 15073582U JP 15073582 U JP15073582 U JP 15073582U JP S6237159 Y2 JPS6237159 Y2 JP S6237159Y2
- Authority
- JP
- Japan
- Prior art keywords
- test piece
- bending
- holding plate
- side jig
- fixed
- 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
- 238000012360 testing method Methods 0.000 claims description 52
- 238000005452 bending Methods 0.000 claims description 25
- 238000009661 fatigue test Methods 0.000 claims description 16
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、捩り試験機を用いて曲げ疲労試験を
行うに際して、試験片を試験機に取り付けるため
に使用する治具に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a jig used to attach a test piece to a torsion testing machine when performing a bending fatigue test using a torsion testing machine.
一般に、捩り試験機により曲げ疲労試験を行う
場合、第１図に示すような装置が用いられる。第
１図はその装置の平面図である。図において、１
０は捩り試験機の駆動部、１２は同じく捩り試験
機の固定部である。試験片１４の両端部は固定側
治具１６および駆動側治具１８に固定され、固定
側治具１６と駆動側治具１８はそれぞれ固定部１
２および駆動部１０に連結されている。駆動部１
０は図中１点鎖線で示される軸ａを中心に矢印ｒ
の如く回転することができ、試験片１４に対して
第２図Ｂの如き曲げ変形を加えることができる。
Generally, when conducting a bending fatigue test using a torsion tester, an apparatus as shown in FIG. 1 is used. FIG. 1 is a plan view of the device. In the figure, 1
0 is a driving part of the torsion testing machine, and 12 is a fixed part of the torsion testing machine. Both ends of the test piece 14 are fixed to a fixed side jig 16 and a driving side jig 18, and the fixed side jig 16 and the driving side jig 18 are respectively fixed to the fixed part 1.
2 and the drive unit 10. Drive part 1
0 is an arrow r centered on the axis a indicated by a dashed line in the figure.
The test piece 14 can be rotated as shown in FIG. 2B, and bending deformation as shown in FIG.
しかして従来の曲げ疲労試験においては、治具
１６，１８は試験片１４を堅固に把持するよう構
成されている。そのため試験片１４の一端から他
端への長さは変形に対して小さくなり、（第２図
Ａは試験片１４が中立状態にあるものを示し、そ
の長さl1は、試験片１４の曲げによつて一端から
他端までの長さl2がl1よりも小さくなる。）、試験
片１４に対して曲げ荷重の他に圧縮荷重も付加さ
れ、純粋な曲げ荷重による疲労試験が行うことが
できない。
In conventional bending fatigue tests, the jigs 16 and 18 are configured to firmly grip the test piece 14. Therefore, the length of the test piece 14 from one end to the other becomes smaller with respect to the deformation (Fig. 2A shows the test piece 14 in a neutral state, and the length l 1 of the test piece 14 is (The length l 2 from one end to the other end becomes smaller than l 1 due to bending.) In addition to the bending load, a compressive load is also applied to the test piece 14, and a fatigue test using a pure bending load is performed. I can't.
これを第３図を参照して詳しく説明する。第３
図Ａは曲げ応力分布が正規のものである。前述の
如く試験片１４に曲げが加えられ、従来例の如く
l2がl1よりも小さくなると第３図Ｂのように圧縮
応力が加わるようになり、第３図ＡとＢが合成さ
れた第３図Ｃの如き偏つた応力分布が生ずる。そ
のため正常な曲げ応力が付加されないようになる
のである。 This will be explained in detail with reference to FIG. Third
In Figure A, the bending stress distribution is normal. Bending is applied to the test piece 14 as described above, and as in the conventional example,
When l 2 becomes smaller than l 1 , compressive stress is applied as shown in FIG. 3B, and a biased stress distribution as shown in FIG. 3C, which is a combination of FIGS. 3A and B, is generated. Therefore, normal bending stress is no longer applied.
特に高負荷低サイクル寿命試験を行う場合、あ
るいは低弾性率を有する試験片について曲げ疲労
試験する場合にあつては、大きな変形を加える必
要が生じ、上述の如き応力分布の偏りによる問題
点が顕在化される。 In particular, when performing high-load, low-cycle life tests, or when performing bending fatigue tests on specimens with low elastic modulus, it is necessary to apply large deformations, and problems due to the biased stress distribution described above become apparent. be converted into
本考案の目的は、上記従来の問題点を解消し、
常に試験片に加えられる曲げ応力分布が正規のも
のとなり、正確な曲げ疲労試験を行うことができ
る捩り試験機による曲げ疲労試験装置を提供する
ことにある。 The purpose of this invention is to solve the above conventional problems,
To provide a bending fatigue testing device using a torsion tester, which allows the bending stress distribution applied to a test piece to always be normal and allows accurate bending fatigue testing.
上記目的を達成するために、本考案の捩り試験
機による曲げ疲労試験装置は、同一軸線上に固定
部と駆動部を対向配置するとともに、前記駆動部
を前記軸線回りに回動自在とし、前記固定部に固
定側治具を、前記駆動部に駆動側治具を設け、か
つ前記両治具を前記軸線に対して対向配置した捩
り試験機による曲げ疲労試験装置において、前記
固定側治具と駆動側治具のいずれか一方に、試験
片の一端を保持する保持体と、該保持体を前記試
験片の引張方向に摺動可能に支持する支持体とか
らなる試験片支持部を設けたものである。
In order to achieve the above object, a bending fatigue testing device using a torsion testing machine of the present invention has a fixed part and a driving part disposed facing each other on the same axis, and the driving part is rotatable around the axis, and the In a bending fatigue testing apparatus using a torsion tester, in which a fixed part is provided with a fixed side jig, and the drive part is provided with a drive side jig, and both the jigs are arranged opposite to each other with respect to the axis, the fixed side jig and A test piece support part consisting of a holder that holds one end of the test piece and a support that slidably supports the holder in the tensile direction of the test piece is provided on either one of the driving side jigs. It is something.
上記構成によれば、試験片の一端側は堅固に固
定されるとともに、他端側は試験片支持部によつ
て摺動可能に支持される。そして、駆動部を回動
させて試験片に曲げモーメントを加えると、試験
片にはその長手方向に沿つた圧縮荷重も作用する
が、試験片はその圧縮荷重が作用する方向に摺動
し、試験片が圧縮されることを防止している。
According to the above configuration, one end side of the test piece is firmly fixed, and the other end side is slidably supported by the test piece support section. When the drive unit is rotated to apply a bending moment to the test piece, a compressive load along the longitudinal direction is also applied to the test piece, but the test piece slides in the direction in which the compressive load is applied. This prevents the test piece from being compressed.
以下図面に示す実施例を参照して本考案を更に
詳細に説明する。
The present invention will be explained in more detail below with reference to embodiments shown in the drawings.
第１図は本考案に係る曲げ疲労試験装置の要部
平面図、第４図は第１図−線に沿う断面図で
ある。 FIG. 1 is a plan view of a main part of a bending fatigue testing apparatus according to the present invention, and FIG. 4 is a sectional view taken along the line - FIG. 1.
第４図において、２０は治具本体であつて、上
型２２と下型２４とを備え、両型２２，２４の間
が嵌合部２６とされている。試験片１４は挾持板
２８，３０によつて挾持され、前記嵌合部２６に
摺動可能に挿入されている。即ち挾持板２８，３
０のそれぞれの背面にはわずかな凹部が形成さ
れ、この凹部と上型２２、下型２４との間には挾
持板挿入方向（紙面と垂直方向）と直交する方向
にローラベアリング３２，３４が配置されてい
る。 In FIG. 4, reference numeral 20 denotes a jig main body, which includes an upper die 22 and a lower die 24, and a fitting portion 26 is formed between the two dies 22 and 24. The test piece 14 is held between holding plates 28 and 30, and is slidably inserted into the fitting portion 26. That is, the clamping plates 28, 3
A slight recess is formed on the back surface of each of the molds 0, and between this recess and the upper mold 22 and the lower mold 24, roller bearings 32 and 34 are installed in a direction perpendicular to the inserting direction of the clamping plate (perpendicular to the paper surface). It is located.
そのため試験片１４に圧縮荷重が加わろうとす
ると、試験片１４は治具１６に入り込む方向にス
ライドし、該試験片１４に加えられようとする圧
縮荷重が除去される。 Therefore, when a compressive load is about to be applied to the test piece 14, the test piece 14 slides in the direction of entering the jig 16, and the compressive load that is about to be applied to the test piece 14 is removed.
第５図は本考案の異なる実施例に係る治具１
６′の断面図、第６図は第５図−線に沿う断
面図である。尚第５図は第６図の−線に沿う
断面を示し、第４図に相当する図面である。 FIG. 5 shows a jig 1 according to a different embodiment of the present invention.
6' is a sectional view taken along line 5-- in FIG. Note that FIG. 5 shows a cross section taken along the - line in FIG. 6, and is a drawing corresponding to FIG. 4.
第５図および第６図において、４０は上型、４
２は下型であつて、それぞれ略半割円柱形であ
り、かつそれぞれフランジ部４４，４６を有しボ
ルト４８，５０によつて捩り試験機の固定部１２
に固着されている。上型４０と下型４２との間は
嵌合部５２が形成され、挾持板５４，５６にその
一端が挾持された試験片１４が摺動可能に挿入さ
れている。即ち挾持板５４，５６はボルト５７に
よつて締結されており、かつそれらの背面にはそ
れぞれ溝５８，６１が浅く設けられ、この溝５
８，６０と上型４０、下型４２との間にそれぞれ
ローラベアリング６２，６４が配設されている。
図中６６，６８は上型４０と下型４２とを連結す
る部材であつて、それぞれボルト７０，７２によ
つて上型４０、下型４２に締着されボルト７３に
よつて締め付けられている。また７４は上型４
０、下型４２を固定部１２近傍の部分において接
近方向に締め付けるためのボルトである。 In FIGS. 5 and 6, 40 is an upper mold;
Reference numeral 2 denotes a lower mold, each of which has a substantially half-cylindrical shape, and has flange portions 44 and 46, respectively, and is fixed to the fixing portion 12 of the torsion testing machine by bolts 48 and 50.
is fixed to. A fitting part 52 is formed between the upper mold 40 and the lower mold 42, and the test piece 14, one end of which is clamped by clamping plates 54, 56, is slidably inserted. That is, the clamping plates 54 and 56 are fastened with bolts 57, and shallow grooves 58 and 61 are provided on their back surfaces, respectively.
Roller bearings 62 and 64 are disposed between the roller bearings 8 and 60 and the upper mold 40 and lower mold 42, respectively.
In the figure, 66 and 68 are members that connect the upper mold 40 and the lower mold 42, and are fastened to the upper mold 40 and the lower mold 42 by bolts 70 and 72, respectively, and are tightened by a bolt 73. . Also, 74 is the upper mold 4
0. This is a bolt for tightening the lower die 42 in the vicinity of the fixing part 12 in the approach direction.
本実施例においても試験片１４に圧縮荷重が加
わろうとすると試験片１４は治具１６′の挿入方
向にスライドし、圧縮荷重が除去される。 In this embodiment as well, when a compressive load is about to be applied to the test piece 14, the test piece 14 slides in the insertion direction of the jig 16', and the compressive load is removed.
上記の各実施例においては挾持板と上型および
下型との間にはローラベアリングが配置されてい
るので、試験片の摺動が極めてスムーズであり、
試験片に加えられる圧縮荷重が確実に除去される
という効果がある。 In each of the above embodiments, roller bearings are placed between the holding plate and the upper and lower molds, so the test piece slides extremely smoothly.
This has the effect of reliably removing the compressive load applied to the test piece.
尚上記各実施例においては、上型および下型が
採用され試験片はそれぞれ水平に配列されている
が、試験片の取り付け角度は任意であつて、例え
ば垂直あるいは斜め方向等任意に取り付けること
ができる。 In each of the above embodiments, an upper die and a lower die are used, and the test pieces are arranged horizontally, but the test pieces can be attached at any angle, such as vertically or diagonally. can.
以上説明したように、本考案によれば、試験片
の一端側はその引張方向に摺動可能であるので、
曲げ疲労試験で試験片が曲げられた時、試験片に
圧縮荷重が加わることを防止でき、試験片には常
に曲げ応力のみが加わることになり、正確な曲げ
疲労試験を行うことができる。
As explained above, according to the present invention, one end side of the test piece is slidable in the tensile direction.
When a test piece is bent in a bending fatigue test, it is possible to prevent compressive loads from being applied to the test piece, and only bending stress is always applied to the test piece, allowing accurate bending fatigue tests to be performed.
第１図は本考案に係る曲げ疲労試験装置の要部
平面図、第２図Ａ，Ｂはそれぞれ試験片の側面
図、第３図Ａ，ＢおよびＣは試験片に加えられる
荷重のベクトル図、第４図は第１図−線に沿
う断面図、第５図は本考案の他の実施例を示す断
面図、第６図は第５図−線に沿う断面図であ
る。
１０……駆動部、１２……固定部、１４……試
験片、１６，１６′……治具、２０，２０′……治
具本体、２２……上型、２４……下型、２６……
嵌合部、２８，３０……挾持板、４０……上型、
４２……下型、５２……嵌合部、５４，５６……
挾持板、３２，３４，６２，６４……ローラベア
リング。
Figure 1 is a plan view of the main parts of the bending fatigue testing device according to the present invention, Figures 2 A and B are side views of the test piece, and Figure 3 A, B and C are vector diagrams of the loads applied to the test piece. , FIG. 4 is a sectional view taken along the line in FIG. 1, FIG. 5 is a sectional view showing another embodiment of the present invention, and FIG. 6 is a sectional view taken along the line in FIG. 5. 10... Drive part, 12... Fixed part, 14... Test piece, 16, 16'... Jig, 20, 20'... Jig body, 22... Upper mold, 24... Lower mold, 26 ……
Fitting portion, 28, 30... clamping plate, 40... upper mold,
42... lower mold, 52... fitting part, 54, 56...
Holding plate, 32, 34, 62, 64...Roller bearing.
Claims (1)
とともに、前記駆動部を前記軸線回りに回動自
在とし、前記固定部に固定側治具を、前記駆動
部に駆動側治具を設け、かつ前記両治具を前記
軸線に対して対向配置した捩り試験機による曲
げ疲労試験装置において、前記固定側治具と駆
動側治具のいずれか一方に、試験片の一端を保
持する保持体と、該保持体を前記試験片の引張
方向に摺動可能に支持する支持体とからなる試
験片支持部を設けたことを特徴とする捩り試験
機による曲げ疲労試験装置。 (2) 前記試験片支持部は、保持体として前記試験
片の一端を挾持する挾持板と、支持体として前
記挾持板に当接して配設され挾持板を前記試験
片の引張方向に摺動可能に支持するローラベア
リングとからなることを特徴とする実用新案登
録請求の範囲第(1)項記載の捩り試験機による曲
げ疲労試験装置。[Claims for Utility Model Registration] (1) A fixed part and a driving part are disposed facing each other on the same axis, and the driving part is rotatable around the axis, and a fixed side jig is attached to the fixed part, and In a bending fatigue test apparatus using a torsion tester in which a drive side jig is provided in the drive part and both of the jigs are arranged opposite to the axis, one of the fixed side jig and the drive side jig, Bending using a torsion testing machine characterized by providing a test piece support part consisting of a holder that holds one end of the test piece and a support that supports the holder so that it can slide in the tensile direction of the test piece. Fatigue test equipment. (2) The test piece supporting section includes a holding plate that holds one end of the test piece as a holder, and a holding plate that is disposed in contact with the holding plate as a support and slides the holding plate in the tensile direction of the test piece. A bending fatigue testing device using a torsion testing machine as set forth in claim (1) of the claimed utility model registration, characterized in that the device comprises a roller bearing that can be supported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15073582U JPS59116848U (en) | 1982-10-04 | 1982-10-04 | Bending fatigue testing device using torsion testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15073582U JPS59116848U (en) | 1982-10-04 | 1982-10-04 | Bending fatigue testing device using torsion testing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59116848U JPS59116848U (en) | 1984-08-07 |
| JPS6237159Y2 true JPS6237159Y2 (en) | 1987-09-22 |
Family
ID=30334234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15073582U Granted JPS59116848U (en) | 1982-10-04 | 1982-10-04 | Bending fatigue testing device using torsion testing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59116848U (en) |
-
1982
- 1982-10-04 JP JP15073582U patent/JPS59116848U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59116848U (en) | 1984-08-07 |
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