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Drop hammer type low-speed impact testbed

A low-velocity impact and test bench technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as poor applicability, insufficient data, and inability to change the temperature environment, so as to improve flexibility and universality, improve Effects on Reliability and Safety

Pending Publication Date: 2019-03-08
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a drop hammer type low-speed impact test bench to solve the problem that when the current common equipment is used, because the performance of the equipment is relatively simple, the impact angle of the equipment cannot be controlled during the experiment, and the impact angle cannot be changed. The temperature environment when the test object is subjected to the impact test, the data obtained from the test is not comprehensive enough, and it is impossible to better understand the impact resistance of the test object at different temperatures, so that the test object cannot be improved very well, and the applicability is not good. strong question

Method used

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  • Drop hammer type low-speed impact testbed

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Embodiment 1

[0034] refer to Figure 1~4 , In an embodiment of the present invention, a drop-weight low-speed impact test bench, 1. Including the main body of the test bench for fixing the specimen, the drop weight assembly, the angle adjustment mechanism and the temperature adjustment mechanism:

[0035] The test bench body includes a hammer lifting beam 1, a limiter 7, an impact bottom plate 8, a hydraulic oil buffer pressure adjustable cylinder shock absorber 11, multiple detachable splints 13 for various impact hole test pieces, and a vertical rod 17. The test piece splint 13 is clamped on the test bench body, and the test piece splint 13 is hinged on the vertical rod 17 and can rotate with the test bench body; the test piece splint 13 is provided with impact notches of two shapes , which are rectangular holes and circular holes respectively, and the upper and lower impact notches have the same size, which can be applied to various specifications of specimens for impact experiments, b...

Embodiment 2

[0041] In another embodiment of the present invention, the difference between this embodiment and the above-mentioned embodiment is that an accelerometer and a sensor are also provided on the pendant 6, and the accelerometer is installed at the end of the pendant 6, which can The acceleration of the hanging hammer 6 is constantly monitored, and the real-time speed of the hanging hammer is obtained by integrating the time t, and the contact load of the material plate is obtained by using the formula F=ma.

[0042] The working principle of the present invention is: the first step, at the beginning of the test, according to the specifications of the test piece, select the test piece splint 13 that adopts the corresponding impact hole, place the test piece in the center of the bottom splint, and fix the test piece splint with bolts 13 of the upper plate, so that the test piece cannot be displaced, and gently push the test piece by hand to check whether it is clamped;

[0043] The ...

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Abstract

The invention discloses a drop hammer type low-speed impact testbed and relates to the technical field of drop hamper impact testing devices. The drop hammer type low-speed impact testbed comprises atestbed body for fixing test pieces, a drop hammer assembly, an angle adjusting mechanism and a temperature adjusting mechanism, wherein the testbed body comprises a lift hammer horizontal beam, a limiter, an impact bottom plate, a hydraulic oil trimmer pressure adjustable air cylinder damper, a plurality of various detachable impact hole test piece clamp plates and a vertical rod; the drop hammerassembly comprises a pulley, a drop hammer steel beam, a direct-current sucker type electromagnet, a balance weight block and a drop hammer; the angle adjusting mechanism comprises a vertical bearingpolish rod seat and a planar corner angle scale; the temperature adjusting mechanism comprises two digital-display temperature-control electric heating plate, a handle, a cover plate and a digital-display controller. By means of the structure, the drop hammer type low-speed impact testbed disclosed by the invention can well simulate impact tests of composite materials at different angles and different temperatures. Mechanical properties of materials of the test pieces are analyzed, so that flexibility and universality of drop hammer impact tests are greatly improved.

Description

technical field [0001] The invention relates to the technical field of drop-weight impact test devices, in particular to a drop-weight low-velocity impact test bench, in particular to a low-velocity impact test bench that can continuously adjust the impact angle and test temperature of a test piece. Background technique [0002] Composite materials are known for their high specific modulus, excellent fatigue resistance, good heat resistance and unique designability. Composite materials are widely used in the aerospace field. Because the aircraft may encounter impacts such as flying birds, hail, and runway debris, it is characterized by variable impact speeds and impact angles. After impact damage, the mechanical properties of the material such as fatigue resistance, corrosion, and creep will be greatly reduced, thereby significantly reducing the damage tolerance capability of the structure and affecting the normal operation of the aircraft. In engineering practice, the imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/303G01N3/02
CPCG01N3/02G01N3/303G01N2203/001G01N2203/0039G01N2203/0222
Inventor 万云杨海龙陈莘莘罗文俊周双喜童谷生
Owner EAST CHINA JIAOTONG UNIVERSITY
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