Test Jig and Test Method

Patent metadata

Field	Value
Publication number	US-2023324255-A1
Application number	US-202118023782-A
Country	US
Kind code	A1
Filing date	Mar 2, 2021
Priority date	Sep 8, 2020
Publication date	Oct 12, 2023
Grant date	—

Abstract

A vibration generation device which can vibrate in only one axial direction is used to simultaneously load a vibration force in a plurality of axial directions onto a test piece, and to make it possible to easily modify the proportion of vibration force in each axial direction. The present invention includes: a vibration generation device connection part 1 which is connected to the vibration generation device and is vibrated in a z-axis direction; a first diaphragm 2 which is connected to the vibration generation device connection part 1 and extends in cantilevered form in an x-axis direction intersecting the z-axis direction; a second diaphragm 3 which is connected to the vicinity of an end of the first diaphragm 2 in the x-axis direction, and which extends in cantilevered form in the z-axis direction and a y-axis direction intersecting the x-axis direction; and a test piece installation part 5 on which the test piece is installed and which receives vibrations via the first diaphragm 2 and the second diaphragm 3 from the vibration generation device connection part 1, wherein at least one of the first diaphragm 2 and the second diaphragm 3 has a length adjustment mechanism 6.

First claim

1 . A test jig comprising:
a vibration generating apparatus coupling unit that is able to be coupled to a vibration generating apparatus and is vibrated in a z-axis direction; a first diaphragm that is coupled to the vibration generating apparatus coupling unit and extends in a cantilever manner in an x-axis direction intersecting the z-axis direction; a second diaphragm that is coupled to a vicinity of an x-axis direction end portion of the first diaphragm and extends in a cantilever manner in a y-axis direction intersecting the z-axis direction and the x-axis direction; and a test piece installation portion on which the test piece is able to be installed and which receives vibration from the vibration generating apparatus coupling unit via the first diaphragm and the second diaphragm, wherein at least one of the first diaphragm and the second diaphragm includes a length adjusting mechanism.

2 . The test jig according to claim 1 , wherein
the length adjusting mechanism includes an elongated hole formed in one of the first diaphragm and the second diaphragm, a female screw hole formed in the other of the first diaphragm and the second diaphragm, and a fastening body including a male screw that is able to be screwed into the female screw hole and inserted into the elongated hole, the first diaphragm and the second diaphragm are fixed by screwing and fastening the male screw of the fastening body into the female screw hole, and the first diaphragm and the second diaphragm are able to relatively move along the elongated hole by loosening the male screw of the fastening body from the female screw hole.

3 . The test jig according to claim 1 , further comprising a third diaphragm that is coupled to a vicinity of a y-axis direction end portion of the second diaphragm and extends in the z-axis direction, wherein
the test piece installation portion receives vibration from the vibration generating apparatus coupling unit via the first diaphragm, the second diaphragm, and the third diaphragm.

4 . The test jig according to claim 2 , further comprising a third diaphragm that is coupled to a vicinity of a y-axis direction end portion of the second diaphragm and extends in the z-axis direction, wherein
the test piece installation portion receives vibration from the vibration generating apparatus coupling unit via the first diaphragm, the second diaphragm, and the third diaphragm.

5 . The test jig according to claim 4 , wherein
the length adjusting mechanism includes an elongated hole formed in one of the second diaphragm and the third diaphragm, a female screw hole formed in the other of the second diaphragm and the third diaphragm, and a fastening body including a male screw that is able to be screwed into the female screw hole and inserted into the elongated hole, the second diaphragm and the third diaphragm are fixed by screwing and fastening the male screw of the fastening body into the female screw hole, and the second diaphragm and the third diaphragm are able to relatively move along the elongated hole by loosening the male screw of the fastening body from the female screw hole.

6 . The test jig according to claim 3 , wherein at least one of the first diaphragm, the second diaphragm, and the third diaphragm is formed by combining two members each of which is formed by continuously providing a thick plate portion and a thin plate portion, and the thin plate portions are coupled to each other via the length adjusting mechanism.

7 . The test jig according to claim 4 , wherein at least one of the first diaphragm, the second diaphragm, and the third diaphragm is formed by combining two members each of which is formed by continuously providing a thick plate portion and a thin plate portion, and the thin plate portions are coupled to each other via the length adjusting mechanism.

8 . The test jig according to claim 5 , wherein at least one of the first diaphragm, the second diaphragm, and the third diaphragm is formed by combining two members each of which is formed by continuously providing a thick plate portion and a thin plate portion, and the thin plate portions are coupled to each other via the length adjusting mechanism.

9 . The test jig according to claim 3 , wherein L 3 =2(L 1 +L 2 )/3 holds when an effective length of the first diaphragm is L 1 , an effective length of the second diaphragm is L 2 , and an effective length of the third diaphragm is L 3 .

10 . The test jig according to claim 4 , wherein L 3 =2(L 1 +L 2 )/3 holds when an effective length of the first diaphragm is L 1 , an effective length of the second diaphragm is L 2 , and an effective length of the third diaphragm is L 3 .

11 . The test jig according to claim 5 , wherein L 3 =2(L 1 +L 2 )/3 holds when an effective length of the first diaphragm is L 1 , an effective length of the second diaphragm is L 2 , and an effective length of the third diaphragm is L 3 .

12 . A test method using the test jig according to claim 1 , the test method comprising:
applying vibration including a direction other than the z-axis direction to a test piece by vibrating the vibration generating apparatus coupling unit in the z-axis direction by the vibration generating apparatus.

Assignees

• Hitachi Ltd

Inventors

• Harubeppu Yu
• Tanie Hisashi
• Shintani Hiroshi

Classifications

• G01M7/06 Primary

  Multidirectional test stands · CPC title