KR20170011673A - The Vibration Table for High Accelerated Life Test - Google Patents

The Vibration Table for High Accelerated Life Test Download PDF

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Publication number
KR20170011673A
KR20170011673A KR1020150104741A KR20150104741A KR20170011673A KR 20170011673 A KR20170011673 A KR 20170011673A KR 1020150104741 A KR1020150104741 A KR 1020150104741A KR 20150104741 A KR20150104741 A KR 20150104741A KR 20170011673 A KR20170011673 A KR 20170011673A
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KR
South Korea
Prior art keywords
plate
vibration table
vibrator
vibration
rigid body
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Application number
KR1020150104741A
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Korean (ko)
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KR101703636B1 (en
Inventor
김명한
김철한
김형태
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(주)케이엔알시스템
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Priority to KR1020150104741A priority Critical patent/KR101703636B1/en
Publication of KR20170011673A publication Critical patent/KR20170011673A/en
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Publication of KR101703636B1 publication Critical patent/KR101703636B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G01M7/027—Specimen mounting arrangements, e.g. table head adapters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
    • B06B2201/70—Specific application

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

The present invention relates to a vibration table for a high-speed lifetime tester, and more particularly, to a vibration table for a high-speed life tester having a high durability capable of withstanding vibration while minimizing heat transfer between the upper and lower portions of the vibration table.
An oscillation table for an ultrasonic lifetime tester, the oscillation table comprising: an upper plate on which a product mounting jig on which a product is seated is mounted on an upper surface; A rigid body mounted on a lower portion of the upper plate; A lower plate mounted on a lower portion of the rigid body; And a vibrator mounted on the bottom surface of the lower plate.

Description

[0001] The present invention relates to a vibration table for a high-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration table for a high-speed lifetime tester, and more particularly, to a vibration table for a high-speed life tester capable of enduring vibration while minimizing heat transfer between the upper and lower portions of the vibration table.

In general, almost all mass-produced products supplied to consumers are subjected to reliability tests to ensure high quality and reliability of products. This reliability test improves the pod and performance of the product and minimizes the defect rate. This reliability test is classified into an environmental test such as temperature and humidity, and a durability test such as vibration, shock, and fatigue. Recently, HALT (High Accelerated Life Test) and HASS (High Accelerated Stress Screening) tests are the representative reliability tests to confirm the life of the product in a short period of time with severe test environment conditions.

 Accelerated tester such as Halt and Haas usually fixes the test object on the top of the vibration table and the vibrator (air hammer) using the air pressure generates vibration of the multiaxial composite waveform in the lower part of the vibration table. The reliability of the product is measured by checking the vibration characteristics of the test subject according to the frequency of the vibrator and the vibration level causing the product to fail.

In general, when the vibration table is used for a long period of time, the vibration transmitting part connected from the bottom to the top of the table is durable and vibration transmission effect is degraded. Also, sudden temperature changes due to thermal shock during the environmental test shall have a minimum effect on the lower part of the vibration table where the vibrator is installed. Therefore, the vibration table needs to have rigidity that minimizes heat transfer from the upper part of the table to the lower part of the table where the vibrator is installed, and can withstand the acceleration vibration.

In the case of the prior art, Japanese Patent No. 0559457 relates to a vibrator table apparatus, wherein the vibrator table apparatus includes a main table member driven by at least two vibrators, the major axis lines of the vibrators being spaced apart from each other, Wherein the table member has a plurality of cylindrical holes formed through the table member and extends between the upper and lower surfaces of the table member, the total area of the holes being between 40% and 60% of the area formed by the peripheral edge of the table member, And a plurality of sockets on the upper surface of the table member.

In addition, Japanese Patent Application Laid-Open No. 10-2010-0051822 also relates to an improved vibrator table frame, wherein the vibrator table device is driven by at least two vibrators, has upper and lower surfaces, and a base table member Wherein at least one of the upper and lower surfaces of the base table member is provided with openings for each of a plurality of substantially parallel first channels and substantially perpendicular to and substantially parallel to the plurality of first channels And a vibrator table frame in which an opening for each of the plurality of second channels is formed.

In the above-described conventional technique, stress is concentrated on the shape of the table, and there is a problem that it is easily damaged by high-intensity vibration.

It is an object of the present invention to provide a vibration table for an ultra-high speed life test machine capable of securing a rigidity that can withstand high vibration, thereby ensuring durability for a long period of use, And a vibration table for a high-speed lifetime tester capable of minimizing changes in vibration characteristics caused by changes in ambient temperature of the vibrator.

In order to achieve the above object, the present invention provides a vibration table for an ultra-high speed life test machine, wherein the vibration table comprises: an upper plate on which a product mounting jig on which a product is placed is mounted on an upper surface; A rigid body mounted on a lower portion of the upper plate; A lower plate mounted on a lower portion of the rigid body; And a vibrator mounted on the bottom surface of the lower plate.

The upper plate in the present invention is constituted by a rectangular plate and a bolt fastening tab for mounting a product mounting jig formed on the upper surface of the rectangular plate.

Further, in the present invention, the rigid body is constituted by a rectangular outer frame formed on the edge, and a horizontal partition wall and a vertical partition wall formed in a lattice form in the outer frame.

Further, in the present invention, the outer frame is constituted by a cubic frame opened up and down, right and left, and the horizontal partition wall and the vertical partition wall intersect each other inside the cubic frame and form a lattice, One or more circular holes are formed in one of the vertical partition walls and one or more elliptical holes are formed in the other partition wall.

In addition, the group possessed by the present invention is characterized in that it is mounted on the bottom surface of the lower plate on which the transverse bulkhead or vertical bulkhead is located.

Further, in the present invention, the lower plate is composed of a rectangular plate and a bolt fastening hole for a vibrator formed on the bottom surface of the rectangular plate, and the bolt fastening hole for the vibrator is formed at the intersection of the transverse bulkhead and the longitudinal bulkhead .

The present invention relates to a vibration table composed of a rigid body having a partition wall structure, in which the rigidity of the vibration table is increased to ensure durability and the heat transfer due to the circular or elliptical holes in the horizontal and vertical partition walls of the rigid body is minimized, So that the change of the excitation characteristic due to the change can be minimized.

In addition, since the present invention can increase the capacity of a vibrating unit due to securing rigidity, it has an advantage that a vibration test of a test subject having a large volume or a large weight can be performed.

Further, since the shape of the rigid body improves the durability of the testing machine, the present invention has the effect of reducing maintenance cost.

1 is a perspective view of a vibration table for a high-speed life test machine according to the present invention;
2 is a side view of a vibration table for a high-speed life test machine according to the present invention;
3 is a perspective view of a rigid body according to the present invention;
4 is a bottom perspective view of a vibration table for a high-speed life test machine according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are intended to illustrate the present invention in a manner that allows a person skilled in the art to easily carry out the invention, And this does not mean that the technical idea and scope of the present invention are limited.

FIG. 1 is a perspective view of a vibration table for a high-speed life test machine according to the present invention, FIG. 2 is a side view of a vibration table for a high-speed life test machine according to the present invention, FIG. 3 is a perspective view of a rigid body according to the present invention, 1 is a bottom perspective view of a vibration table for a high-speed life test machine according to the present invention.

1, the vibration table 1 for a high-speed lifetime tester according to the present invention includes an upper plate 10, a rigid body 20 mounted on a lower portion of the upper plate 10, A lower plate 30 mounted on the lower portion of the lower plate 30, and a vibrator 40 mounted on the lower portion of the lower plate 30.

1 and 2, the upper plate 10 is composed of a rectangular plate 11 and a bolt fastening tab 12 formed on the upper surface of the rectangular plate 11. The rectangular plate 11 is formed to have a predetermined thickness and the bolt fastening tab 12 may be formed to have the same plane as the upper surface of the rectangular plate 11, As shown in FIG.

As shown in Figs. 1 to 3, the rigid body 20 is mounted on the lower portion of the upper plate 10. The rigid body 20 can be bolted or welded to the top plate 10. 3, the rigid body 20 is composed of an outer frame 21, a horizontal barrier rib 22 and a vertical barrier rib 23 formed in a lattice form in the outer frame 21. The outer frame 21 is constituted by a cubic frame whose upper, lower, left and right sides are open. The heat transmitted through the outer frame 21 can be minimized. The top plate 10, the horizontal barriers 22 and the vertical barriers 23 support the contact area corresponding to the thickness of the barrier ribs. The upper barriers 22 and the vertical barriers 23 intersect each other to support the upper plate 10 Heat transfer can be minimized. Circular or elliptical holes 22-1 and 23-1 are formed in the horizontal barrier rib 22 and the vertical barrier rib 23 in order to minimize heat transfer. In the drawing, an elliptical hole 22-1 is formed in the horizontal partition wall 22, and a circular hole 23-1 is formed in the vertical partition 23, but the present invention is not limited thereto, . Such modifications are obvious to those skilled in the art to which the present invention belongs.

Although not shown in the drawing, bolt holes are formed on both the upper and lower sides at the intersection of the transverse bulkhead 22 and the vertical bulkhead 23. The bolt holes formed in the upper plate 10 are for joining the upper plate 10 and the rigid body 20.

4, the bolt hole 32 formed in the lower plate 30 is formed at the lower portion of the intersection of the horizontal partition wall 22 and the vertical partition wall 23, like the upper plate 10, A bolt hole 32 and a bolt hole 40 of a rigid body 20 (not shown) are mounted. Therefore, the vibrator 40 can be firmly coupled to the rigid body 20 and the lower plate 30. The coupling between the lower plate 30 and the rigid body 20 can also be achieved by welding or the like in addition to the bolt coupling. have.

1 to 4, vibration is primarily transmitted to the lower plate 30 by the vibrator 40, and vibration is transmitted to the rigid body 20 through the lower plate 30. The rigid body 20 again transmits vibration to the upper plate 10 and is transmitted to a product mounting jig (not shown) connected to the bolt fastening tab 12 formed on the upper plate 10, Vibration is transmitted to the product under test. Further, the product to be tested may be directly coupled to the top plate 10 without a product mounting jig (not shown) as a test subject. An extreme condition is imposed on the product under test, and vibration test is usually applied to the product under a temperature of -100 ℃ to 200 ℃. Therefore, heat transfer may occur in the vibration table 1 in the temperature range of the image below zero degrees. It is necessary to minimize the heat transfer to the vibration table 1. Accordingly, the rigid body of the present invention can minimize the thickness of the outer frame 21, the transverse bulkhead 22 and the vertical bulkhead 23, while minimizing the heat transfer according to the contact area by increasing the mass moment of inertia, By minimizing the heat transfer, it is possible to minimize the variation of the excitation performance due to the ambient temperature change of the vibrating part. In other words, since the thermal change of the lower plate 30 due to the heat transfer can be minimized in the excitation portion, there is hardly any problem such as reducing the effect of excitation by the exciter 40. [

It is to be understood by those skilled in the art that the present invention can be embodied in many other forms without departing from the spirit and scope of the invention, even if some embodiments have been described above. It is therefore intended that the above-described embodiments be considered as illustrative rather than restrictive, and that all implementations within the scope of the appended claims and their equivalents are intended to be included within the scope of the present invention.

1: Vibration table
10: upper plate 11: rectangular plate
12: Bolt tightening tab
20: rigid body 21: outer frame
22: transverse bulkhead 22-1: oval hole
23: vertical partition 23-1: circular hole
30: lower plate 31: rectangular plate
32: bolt fastening hole for vibrator 33: fastening bolt hole
40: Exciter

Claims (6)

In a vibration table for an ultra-high speed life test machine,
Wherein the vibration table comprises:
A top plate on which a product mounting jig on which the product is seated is mounted on an upper surface;
A rigid body mounted on a lower portion of the upper plate;
A lower plate mounted on a lower portion of the rigid body; And
A vibrator mounted on a bottom surface of the lower plate;
And a vibration table for a high-speed life test machine.
The method according to claim 1,
Wherein the upper plate comprises a rectangular plate and a bolt fastening tab for mounting a product mounting jig formed on an upper surface of the rectangular plate.
The method according to claim 1,
Wherein the rigid body is constituted by a rectangular outer frame formed on an edge and a horizontal partition wall and a vertical partition wall formed in a lattice form inside the outer frame.
The method of claim 3,
Wherein the outer frame is constituted by a cuboid frame opened up and down, right and left,
The horizontal barrier rib and the vertical barrier rib intersect with each other in the inside of the cube-shaped frame to form a lattice shape. At least one of the vertical barrier ribs and the vertical barrier ribs intersect with each other and at least one elliptical hole Is formed on the upper surface of the vibrating table.
The method of claim 3,
Wherein the vibrator is mounted on a bottom surface of the lower plate on which the transverse bulkhead or the vertical bulkhead is located.
The method of claim 3,
Wherein the lower plate comprises a rectangular plate and a bolt fastening hole for a vibrator formed on the bottom surface of the rectangular plate,
Wherein the bolt fastening hole for the vibrator is formed at the intersection of the transverse bulkhead and the vertical bulkhead.
KR1020150104741A 2015-07-24 2015-07-24 The Vibration Table for High Accelerated Life Test KR101703636B1 (en)

Priority Applications (1)

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KR1020150104741A KR101703636B1 (en) 2015-07-24 2015-07-24 The Vibration Table for High Accelerated Life Test

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Application Number Priority Date Filing Date Title
KR1020150104741A KR101703636B1 (en) 2015-07-24 2015-07-24 The Vibration Table for High Accelerated Life Test

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KR20170011673A true KR20170011673A (en) 2017-02-02
KR101703636B1 KR101703636B1 (en) 2017-02-08

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109520695A (en) * 2019-01-11 2019-03-26 广西科技大学 A kind of shake table for oval packaging material vibration Characteristics
CN112112832A (en) * 2020-09-22 2020-12-22 湖南盈晟电子科技有限公司 Automatic adjusting method for rotating speed of fan

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005233843A (en) * 2004-02-20 2005-09-02 Mitsubishi Heavy Ind Ltd Vibrator and vibration block table
KR20080007455A (en) * 2005-04-08 2008-01-21 핸세 엔바이러멘탈, 아이엔씨. Vibration table

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005233843A (en) * 2004-02-20 2005-09-02 Mitsubishi Heavy Ind Ltd Vibrator and vibration block table
KR20080007455A (en) * 2005-04-08 2008-01-21 핸세 엔바이러멘탈, 아이엔씨. Vibration table

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109520695A (en) * 2019-01-11 2019-03-26 广西科技大学 A kind of shake table for oval packaging material vibration Characteristics
CN109520695B (en) * 2019-01-11 2023-10-20 广西科技大学 Vibrating table for researching vibration characteristics of oval packaging material
CN112112832A (en) * 2020-09-22 2020-12-22 湖南盈晟电子科技有限公司 Automatic adjusting method for rotating speed of fan
CN112112832B (en) * 2020-09-22 2022-02-18 湖南盈晟电子科技有限公司 Automatic adjusting method for rotating speed of fan

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