Flexural rigidity testing device

Abstract

A flexural rigidity testing device comprises an optics lens, a high-rigidity rod, a lifting device, a two-dimensional movable platform, a laser measuring group, a high-low temperature chamber and the like, wherein a bracket on the two-dimensional movable platform penetrates a through hole in the bottom of the high-low temperature chamber to enter the high-low temperature chamber; a to-be-tested piece is mounted on a to-be-tested piece mounting seat which is fixed on the bracket; the high-rigidity rod vertically penetrates the high-low temperature chamber to act on the to-be-tested piece; the upper end of the high-rigidity rod is fixedly connected with the lifting device through a force sensor; the optics lens is fixed on an observation window at the top of the high-low temperature chamber through the mounting seat; the laser measuring group is fixed outside the high-low temperature chamber and opposite to the observation window on the side surface of the high-low temperature chamber in position,. According to the flexural rigidity testing device, a displacement compensation method is adopted, and the direction of the action on the to-be-tested piece remains the same; the two-dimensional movable platform and the optics lens guarantee changeless force arm; the laser measuring group is used for obtaining the corner deformation, so as to accurately obtain a bending moment-angle deformation curve of the flexural rigidity of the to-be-tested piece. The flexural rigidity testing device has the advantages of convenience in use, high reliability, good real-time performance and high measuring accuracy.

Description

technical field [0001] The invention relates to the field of bending stiffness testing of components under high and low temperature environmental conditions. Background technique [0002] Stiffness tests on structural parts are usually carried out at room temperature unless there are special requirements. Existing stiffness tests have many methods and structures according to different test requirements and application fields, but for components in high and low temperature environments Stiffness test, due to thermal expansion and contraction of test fixtures, loading mechanisms, etc. in high and low temperature environments will cause deformation, which will affect the loading of force, measurement of torque and angle, and because of the overheating and cooling of the environment, most of the tests use precision Instruments or equipment will not work normally, affecting the testing work. [0003] At present, the bending stiffness test under high and low temperature is carrie...

AI Technical Summary

Problems solved by technology

However, for the stiffness test at high and low temperatures, the laser emitter cannot be located on the component, and the deformation of the machine base must also be taken into account during the test

The patent application number is 201110370253.4 for "three-dimensional deformation measurement device of the measured part in the high and low temperature box" and the patent application number is 201110370271.2 for the "high precision measurement system for three-dimensional small deformation of the mechanical device in the high and low temperature box" to provide a high and low temperature box The measurement method of three-dimensional deformation of components, but this kind of method can only follow the three-dimensional displacement of a certain point, and the stiffness test needs to obtain accurate loading force and the size of the moment arm

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