JPS5583835A - Electric oil pressure type fatigue testing machine - Google Patents

Electric oil pressure type fatigue testing machine

Info

Publication number
JPS5583835A
JPS5583835A JP15686878A JP15686878A JPS5583835A JP S5583835 A JPS5583835 A JP S5583835A JP 15686878 A JP15686878 A JP 15686878A JP 15686878 A JP15686878 A JP 15686878A JP S5583835 A JPS5583835 A JP S5583835A
Authority
JP
Japan
Prior art keywords
switches
points
signals
oil pressure
modes
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
JP15686878A
Other languages
Japanese (ja)
Other versions
JPS5819981B2 (en
Inventor
Hiroshi Uno
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.)
Saginomiya Seisakusho Inc
Original Assignee
Saginomiya Seisakusho Inc
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 Saginomiya Seisakusho Inc filed Critical Saginomiya Seisakusho Inc
Priority to JP15686878A priority Critical patent/JPS5819981B2/en
Publication of JPS5583835A publication Critical patent/JPS5583835A/en
Publication of JPS5819981B2 publication Critical patent/JPS5819981B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

PURPOSE: To make it possible to facilitate switching of control modes without giving a shock to a test piece by controlling an analogue switch, which is provided in the preceding stage of a servo valve, according to control modes.
CONSTITUTION: An oil pressure is given to servo valve 2 to operate actuator 7, and displacement detection 8, expansion detection 9 and load detection 10 for test piece 4 are performed selectively. In this case, addition point 17 to add control signals of respective modes is provided in the preceding stage of valve 2, and analogue switches 161W163 are provided between point 17 and addition points 151W153 for signals of respective negative feedback control systems, and switching of respective modes is performed by controlling analogue switches. The signal from oscillator 5 and signals from position setting equipments 141W143 are applied to points 151W 153, and the signal from oscillator 5 is made zero, and corresponding mode selection switches 231W233 are depressed when outputs of points 151W153 of the switched mode side. Thus, pertinent switches transfer to opening and closing gradually.
COPYRIGHT: (C)1980,JPO&Japio
JP15686878A 1978-12-21 1978-12-21 Electro-hydraulic fatigue testing machine Expired JPS5819981B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15686878A JPS5819981B2 (en) 1978-12-21 1978-12-21 Electro-hydraulic fatigue testing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15686878A JPS5819981B2 (en) 1978-12-21 1978-12-21 Electro-hydraulic fatigue testing machine

Publications (2)

Publication Number Publication Date
JPS5583835A true JPS5583835A (en) 1980-06-24
JPS5819981B2 JPS5819981B2 (en) 1983-04-21

Family

ID=15637136

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15686878A Expired JPS5819981B2 (en) 1978-12-21 1978-12-21 Electro-hydraulic fatigue testing machine

Country Status (1)

Country Link
JP (1) JPS5819981B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60188191U (en) * 1984-05-25 1985-12-13 株式会社東芝 Air conditioner packaging equipment
WO2019239526A1 (en) 2018-06-13 2019-12-19 三菱ケミカルフーズ株式会社 Oil-in-water pickering emulsion

Also Published As

Publication number Publication date
JPS5819981B2 (en) 1983-04-21

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