JPS6117405Y2 - - Google Patents
Info
- Publication number
- JPS6117405Y2 JPS6117405Y2 JP18282678U JP18282678U JPS6117405Y2 JP S6117405 Y2 JPS6117405 Y2 JP S6117405Y2 JP 18282678 U JP18282678 U JP 18282678U JP 18282678 U JP18282678 U JP 18282678U JP S6117405 Y2 JPS6117405 Y2 JP S6117405Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder chamber
- side cylinder
- hydraulic
- piston
- load side
- 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
- 238000009864 tensile test Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
【考案の詳細な説明】
この考案は金属その他各種材料の試験片を毎秒
１米以上の高速で引張試験する高速引張試験機に
関する。[Detailed description of the invention] This invention relates to a high-speed tensile testing machine that tensile tests test pieces of metals and other various materials at a high speed of 1 meter per second or more.
従来から試験片を高速で引張る場合に引張を停
止させようとしても引張り機構の慣性力等のため
に直ちに停止させることが困難であつた。 Conventionally, when a test piece is pulled at high speed, even if an attempt is made to stop the tension, it has been difficult to stop the tension immediately due to the inertia of the tensioning mechanism.
この考案は引張り機構に複動油圧シリンダー
（以下油圧シリンダーと記す）を使用して、引張
試験中に所定の位置で油圧シリンダーのピストン
を停止させることができるようにサーボ弁を介し
て電気油圧式サーボ方式のクローズド制御をおこ
ない、さらにこの油圧シリンダーの荷重側シリン
ダー室より制動側シリンダー室のピストンの受圧
有効面積を大きくし、動作の確実な高速引張試験
機を実現せんとするものである。 This device uses a double-acting hydraulic cylinder (hereinafter referred to as hydraulic cylinder) for the tensioning mechanism, and an electro-hydraulic system is operated via a servo valve so that the piston of the hydraulic cylinder can be stopped at a predetermined position during the tension test. The objective is to realize a high-speed tensile testing machine that operates reliably by performing closed servo-type control and by increasing the effective pressure-receiving area of the piston in the braking-side cylinder chamber of this hydraulic cylinder than in the load-side cylinder chamber.
つぎにこの考案の一実施例について説明する。
第１図はこの考案の一実施例の高速引張試験機の
概略図で、油圧ポンプ１から送られた油はアキユ
ームレータ２と油圧シリンダー３の負荷側シリン
ダー室Ｌに貯えられる。試験片Ｔを引張る初期設
定位置にピストン９ならびにピストンロツド４を
保持するためにサーボ弁５が動作して制動側シリ
ンダー室Ｂにも油が送られる。 Next, one embodiment of this invention will be described.
FIG. 1 is a schematic diagram of a high-speed tensile testing machine according to an embodiment of this invention, in which oil sent from a hydraulic pump 1 is stored in an accumulator 2 and a load-side cylinder chamber L of a hydraulic cylinder 3. In order to hold the piston 9 and the piston rod 4 at the initial setting position for pulling the test piece T, the servo valve 5 operates and oil is also sent to the braking side cylinder chamber B.
いま引張り試験開始のための停止位置設定信号
Ｓが比較器Ｄに入れられると、サーボ弁５が動作
し、制動側シリンダー室Ｂに貯えられた高圧油は
サーボ弁５を通つて油タンク６へ流れる。この時
負荷側シリンダー室Ｌにはアキユームレータ２に
貯えられた高圧油が瞬間的に送られピストン９は
高速で図中下方向に動き、試験片Ｔを高速度で引
張る。この際試験片Ｔに加わる荷重はロードセル
８で検出される。また試験片Ｔの伸び量は変位は
ピストンロツド１０に機械的に連結されて設置さ
れた変位検出器７で検出される。ピストン９と共
にピストンロツド４が所定の停止位置にくると、
前記停止位置設定信号Ｓと変位検出器７からの検
出信号との差が零になるように比較器Ｄからの出
力信号にもとづいてサーボ弁５が動作してピスト
ン９が所定の位置で停止させられる。この時制動
側シリンダー室Ｂからの油が油タンク６へ流れる
のを停止させるだけでは運動部分の慣性力でピス
トン９ならびにピストンロツド４はオーバーシユ
ートして停止するので、サーボ弁５の動作は制動
側シリンダー室Ｂへ高圧油を瞬時に送り込み、オ
ーバーシユートを抑える。この場合制動側シリン
ダー室Ｂのピストン９の受圧有効面積が、ピスト
ンロツド４の径よりも位置検出ロツド１０の径を
小にして負荷側シリンダー室Ｌのそれより大にし
てあるので停止時の単位面積に対する制動側シリ
ンダー室Ｂの油圧によるピストン９への力は負荷
側シリンダー室Ｌのそれより大きくなり、停止動
作がより確実に行なわれるので油圧シリンダーの
破損等はなくなる。このようにしてクローズドル
ープ制御される点にこの考案の大きな特徴があ
る。また、引張試験の際の引張速度は流量制御弁
１２で制御される。 Now, when the stop position setting signal S for starting the tension test is input to the comparator D, the servo valve 5 operates, and the high pressure oil stored in the braking side cylinder chamber B passes through the servo valve 5 to the oil tank 6. flows. At this time, the high pressure oil stored in the accumulator 2 is instantaneously sent to the load side cylinder chamber L, and the piston 9 moves downward in the figure at high speed, pulling the test piece T at high speed. At this time, the load applied to the test piece T is detected by the load cell 8. Further, the amount of elongation of the test piece T is detected by a displacement detector 7 which is mechanically connected to the piston rod 10. When the piston rod 4 comes to a predetermined stopping position together with the piston 9,
The servo valve 5 operates based on the output signal from the comparator D so that the difference between the stop position setting signal S and the detection signal from the displacement detector 7 becomes zero, and the piston 9 is stopped at a predetermined position. It will be done. At this time, if only the flow of oil from the braking side cylinder chamber B to the oil tank 6 is stopped, the piston 9 and the piston rod 4 will overshoot and stop due to the inertia of the moving parts, so the operation of the servo valve 5 will be stopped. High pressure oil is instantly sent to side cylinder chamber B to suppress overshoot. In this case, the effective pressure receiving area of the piston 9 in the braking side cylinder chamber B is larger than that of the load side cylinder chamber L by making the diameter of the position detection rod 10 smaller than the diameter of the piston rod 4, so the unit area when stopped is The force on the piston 9 due to the hydraulic pressure in the braking side cylinder chamber B becomes larger than that in the load side cylinder chamber L, and the stopping operation is performed more reliably, so that there is no damage to the hydraulic cylinder. A major feature of this invention is that it is controlled in a closed loop in this manner. Further, the tensile speed during the tensile test is controlled by the flow control valve 12.
なお、１１は信号増巾器で比較器Ｄからの信号
を増巾してサーボ弁５を動作させるに適した強さ
にしている。 In addition, 11 is a signal amplifier which amplifies the signal from the comparator D to make it suitable for operating the servo valve 5.
また、第１図においては位置検出器７は位置検
出ロツド１０を介してピストン９の位置を検出し
ているが、ピストンロツド４に取付けても同様の
目的は達成できる。 Further, in FIG. 1, the position detector 7 detects the position of the piston 9 via the position detection rod 10, but the same purpose can be achieved even if it is attached to the piston rod 4.
この考案は以上詳述したように複動油圧シリン
ダーをクローズドループ制御するとともにそのピ
ストンの制動側シリンダー室の受圧有効面積を負
荷側シリンダー室のそれより大きくしたので動
作、特に停止動作が確実かつ安全な高速引張試験
機が実現しえた。 As detailed above, this device performs closed-loop control on a double-acting hydraulic cylinder and makes the effective pressure-receiving area of the braking-side cylinder chamber of the piston larger than that of the load-side cylinder chamber, so operation, especially stopping operation, is reliable and safe. A high-speed tensile testing machine has been realized.
第１図はこの考案の一実施例の高速引張試験機
の概略図である。
１……油圧ポンプ、２……アキユームレータ、
３……複動油圧シリンダ、４……ピストンロツ
ド、５……サーボ弁、７……位置検出器、８……
ロードセル、９……ピストン、１０……位置検出
ロツド、１１……増巾器、１２……流量制御弁、
Ｂ……制動側シリンダー室、Ｌ……負荷側シリン
ダー室、Ｔ……試験片、Ｄ……比較器。
FIG. 1 is a schematic diagram of a high-speed tensile testing machine according to an embodiment of this invention. 1... Hydraulic pump, 2... Accumulator,
3...Double acting hydraulic cylinder, 4...Piston rod, 5...Servo valve, 7...Position detector, 8...
Load cell, 9... piston, 10... position detection rod, 11... amplifier, 12... flow control valve,
B...Brake side cylinder chamber, L...Load side cylinder chamber, T...Test piece, D...Comparator.
Claims (1)
シリンダー室のピストンの受圧有効面積が大きい
複動形油圧シリンダーと、この油圧シリンダーの
ピストンロツドに機械的に連結されて設置されピ
ストン位置を検出する検出器と、この検出器の検
出信号値と設定信号値とを比較する比較器と、こ
の比較器からの出力信号によつて作動し前記油圧
源からの管路を前記負荷側シリンダー室か又は負
荷側シリンダー室及び前記制動側シリンダー室双
方のいずれかに接続するように切換えるサーボ弁
とを備え、前記高圧油圧源からの高圧油を負荷側
シリンダー室に瞬間的に送り込みピストンロツド
に連接された試験片に高速引張荷重を加えるとと
もに試験後は瞬時に両シリンダー室に高圧油を送
り込んでピストンを制動させるようにした高速引
張試験機。 A high-pressure hydraulic power source, a double-acting hydraulic cylinder whose piston in the braking side cylinder chamber has a larger effective pressure-receiving area than the load side cylinder chamber, and a detector installed mechanically connected to the piston rod of this hydraulic cylinder to detect the piston position. and a comparator that compares the detection signal value of this detector with a set signal value, and a comparator that is operated by the output signal from this comparator to connect the pipe line from the hydraulic pressure source to the load side cylinder chamber or the load side cylinder chamber. The test piece is equipped with a servo valve that can be switched to be connected to either the cylinder chamber or the braking side cylinder chamber, and the high pressure oil from the high pressure hydraulic source is instantaneously sent to the load side cylinder chamber to the test piece connected to the piston rod. This is a high-speed tensile testing machine that applies high-speed tensile loads and, after the test, instantly pumps high-pressure oil into both cylinder chambers to brake the pistons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18282678U JPS6117405Y2 (en) | 1978-12-29 | 1978-12-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18282678U JPS6117405Y2 (en) | 1978-12-29 | 1978-12-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55100151U JPS55100151U (en) | 1980-07-12 |
| JPS6117405Y2 true JPS6117405Y2 (en) | 1986-05-28 |
Family
ID=29194494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18282678U Expired JPS6117405Y2 (en) | 1978-12-29 | 1978-12-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6117405Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6128839A (en) * | 1984-07-19 | 1986-02-08 | Shimadzu Corp | High speed step loading apparatus |
| JPH0729475Y2 (en) * | 1986-05-22 | 1995-07-05 | 株式会社島津製作所 | Material testing machine |
-
1978
- 1978-12-29 JP JP18282678U patent/JPS6117405Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55100151U (en) | 1980-07-12 |
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