Portable high-precision drop hammer impact testing machine

A drop hammer impact test, high-precision technology, applied in the direction of strength characteristics, the use of devices for measuring the time required to move a certain distance, force/torque/power measuring instruments, etc., can solve problems such as excessive size, and achieve easy assembly, The effect of simple overall structure

Inactive Publication Date: 2019-04-02
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the bench-top impact testing machine is usually used to test the specimen-level test pieces, but for large-scale engineering structures of composite materials, due to the l...

Method used

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  • Portable high-precision drop hammer impact testing machine
  • Portable high-precision drop hammer impact testing machine
  • Portable high-precision drop hammer impact testing machine

Examples

Experimental program
Comparison scheme
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Embodiment

[0040] A portable high-precision drop weight impact testing machine, its structure is as follows: figure 1 As shown, the portable low-speed impact testing machine of this embodiment includes: a falling weight impact assembly, a photoelectric speed measurement system, a guide rail-slider system, a secondary impact prevention device, a lifting release device, and a support frame 15 and other mechanisms. The falling weight impact component is connected to the support frame 15 through the guide rail-slider system, the photoelectric speed measurement system is connected to the falling weight impact component and the support frame, the anti-secondary impact device is fixed at the bottom of the support frame, and the lifting release device is arranged on the support frame.

[0041] The following is a further description of the above institutions. The photoelectric speed measurement system is composed of a perforated speed measurement plate 6 arranged on the falling weight impact asse...

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PUM

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Abstract

The invention relates to a portable high-precision drop hammer impact testing machine comprising a falling weight impact assembly, a photoelectric speed measuring system, a guide rail-sliding block system, an anti-secondary impact device, a lifting releasing device and a support frame. The falling weight impact assembly is connected with the support frame by the guide rail-sliding block system; the photoelectric speed measuring system is connected with the falling weight impact assembly and the support frame; the anti-secondary impact device is fixed at the bottom of the support frame; and thelifting releasing device is arranged at the support frame. Compared with the prior art, the portable high-precision drop hammer impact testing machine has the following advantages: the overall structure is simple; the machine is convenient to assemble and move; the impact force, the impact speed and the rebound speed can be synchronously measured in real time; the drop hammer falls along the guide rail; the guiding precision is high; the impact point position is accurate; the testing machine is suitable for the low-speed impact tests of various large engineering structures; and the impact process can be studied and analyzed further by force, impact speed, and rebound speed collection.

Description

technical field [0001] The invention relates to an impact testing machine, in particular to a portable high-precision drop weight impact testing machine. Background technique [0002] During the manufacture and use of composite structures, they are very sensitive to out-of-plane loads, and are prone to various forms of damage such as fiber breakage, delamination, and matrix cracking under impact, which greatly reduces the load-carrying capacity of the structure. Similarly, during the application of composite structures in the field of aeronautical engineering, a large number of tests on the load-carrying properties of damaged structures are required, so it is necessary to carry out corresponding impact damage prefabrication tests. [0003] ASTM test standard D7136 / D7136M-05 stipulates a kind of test method for composite material drop hammer impact, puts forward specific requirements for measuring and calculating physical quantities such as impact force, impact energy and reb...

Claims

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Application Information

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IPC IPC(8): G01N3/303G01P3/68G01L5/00
CPCG01L5/0052G01N3/303G01P3/68
Inventor 于哲峰朱峤
Owner SHANGHAI JIAO TONG UNIV
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