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Surface strength testing apparatus

A test device and surface strength technology, which is applied in the direction of applying repeated force/pulsation force to test the strength of materials, and can solve problems such as sharp edges of thin film specimens

Active Publication Date: 2015-08-26
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above problems, the present invention provides a surface strength testing device, which can effectively solve the problem of sharp corners on the edge of the film test piece, and select the fatigue test method of the film test piece to resist punching and impact to obtain the fatigue life of the test piece

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Embodiment Construction

[0027] See figure 1 — Figure 7 , the specific embodiment of the present invention will be further described in conjunction with accompanying drawing:

[0028] The invention provides a surface strength testing device, which includes a machine base, a film fixing part, a stamping part and a stamping driving part. The position connection relationship among them is: the film fixed part, the stamping part and the stamping driving part are all fixedly connected on the machine base.

[0029] Step 1: Install the film fixing part. The fixed part of the film is composed of left clamp body 2, right clamp body 3, and film specimen 2,0. The left clamp body 2 is a cylinder as a whole, and the left clamp body 2 has a round hole on the central axis of the left end surface (the diameter of the round hole is larger than the diameter of the stamping head, smaller than the diameter of the film test piece), the central axis of the right end face has a counterbore with the same diameter as the ...

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Abstract

A surface strength testing apparatus comprises a base, a film fixing portion, a stamping portion and a stamping drive portion. A film fixing mechanism is connected to the base through a bracket and a film is clamped between a left clamp and a right clamp. The head of a stamping head is designed to be a cylinder. One end surface in contact with a thin test workpiece during stamping, of the cylinder is an arc surface. The stamping mode is that two stamping heads are fixedly connected to a stamping frame to repeatedly and alternatively stamp the front and the back surfaces of the film. The stamping drive portion uses an electromagnetic actuator for driving. The actuator is connected to the stamping portion through a telescopic cylinder. A force sensor is arranged on the telescopic cylinder. The actuator and the force sensor are electrically connected to a data acquisition system. The fatigue testing machine is mainly used for testing film test workpiece fatigue properties and is short in operation cycle, low in energy consumption and capable of effectively improving the efficiency of the fatigue life test.

Description

technical field [0001] The invention relates to a surface strength testing device, in particular to a fatigue test device for testing the fatigue life of a thin film specimen. The device of the present invention utilizes a fatigue test of punching and breaking the center of the thin film specimen, and belongs to the material performance test field. The device has simple structure, high working efficiency and wide applicability. Background technique [0002] In modern industry, fatigue fracture is the main cause of failure of mechanical parts and engineering components. Therefore, it is very important to perform fatigue strength tests on these parts in advance. In order to avoid damage to components due to fatigue fracture, when performing strength check experiments on new equipment or equipment in operation, only by simulating real loads and environments can their fatigue characteristics be truly evaluated. [0003] With the development of modern industry, the research an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/38
Inventor 陈志同卢延钧牛永松汪广平屈新河
Owner BEIHANG UNIV
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