Fatigue testing machine capable of adjusting coaxiality and loading chain centering adjustment method

Abstract

The invention relates to a fatigue testing machine capable of adjusting coaxiality and a loading chain centering adjustment method and belongs to the technical field of testing machines. The fatigue testing machine comprises a main shaft loading chain, a centering adjustment device, a centering sensor, a feedback device and a rack. The centering adjustment device is installed on the main shaft loading chain, the main shaft loading chain is installed on the rack, and a detection and feedback mechanism is installed on the rack and used for detecting and controlling an adjustment amount. The five-degree-of-freedom adjustment on the loading chain can be carried out. The strength of the device is improved, an adjusting module is mounted on a same parent body such that the rigidity of the deviceis improved, and the device is more stable and safer in a loading process. The adaptability is high, loading chains with different shaft diameters can be installed by adjusting the sizes of the parent body and other parts, and other types of testing machines can also be installed. The fatigue testing machine can be matched with various clamps and has the advantages of small occupation space, easyoperation, controllable adjustment precision, good stability and high repeated adjustment precision, the experiment precision can be improved, and the measurement data is more accurate.

Description

Technical field [0001] The invention relates to the technical field of testing machines, in particular to a fatigue testing machine capable of adjusting coaxiality and a method for adjusting the centering of a loading chain. The coaxiality of the loading chain can be calibrated on the testing machine. Background technique [0002] With the development of economy and the progress of science and technology, the testing machine industry has sprung up like bamboo shoots after a rain, and various testing machines for different purposes continue to emerge. The testing machine can measure the mechanical properties, process properties, internal defects of materials and verify rotating parts. Dynamic imbalance and other aspects, and more and more widely used in the mechanical industry and other fields. The traditional coaxiality adjustment method of the test machine is manual adjustment, but the manual adjustment efficiency is low, and the standard is different, and the adjustment amount...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a fatigue testing machine with adjustable coaxiality and a method for adjusting the centering of the loading chain, which solves the problem that the loading chain of the existing testing machine needs to be disassembled for the coaxiality of the loading chain and cannot be adjusted in real time. To a certain extent, it fills the gap in the prior art; the invention solves the uncontrollable precision of manual assembly adjustment, realizes one adjustment, good stability without repeated adjustment and high reliability, and at the same time, the adjustment axis is indexed to make the adjustment amount reach 0.01mm, large adjustment range (±0.5mm), the upper angle adjustment spherical radius of the mother body reaches the center of the loaded specimen, and the adjustment angle can be ±0.35°; the combination of the centering device and the screw connection of the fixture can realize the adjustment of five degrees of freedom ( The loading chain is installed with two degrees of freedom in the orthogonal plane, two degrees of freedom in rotation, and the axial rotation of the loading chain), which can realize the adjustment of any angle and direction on the loading chain; the wearing parts inside the adjustment device and the parts that require high positioning accuracy are standardized designs The important parts are easy-to-machine parts and standard parts of rotary parts, which reduce loss and increase the service life of the device, while the stiffness of the whole device has no effect; the device is connected with the loading chain of the whole machine, which improves the strength of the whole device and reduces the impact on the loading shaft. damage and deformation, the flange connection is used to eliminate the internal centering gap of the loading chain, and the stiffness of the adjustment device has no effect on the stiffness of the whole machine system. The machine bears, which improves the strength of the device and the adjustment module is installed on the same parent body to increase the rigidity of the device and make it more stable and safe during the loading process; the centering device in the present invention has strong adaptability, by adjusting the parent body and other parts The size is used to install loading chains with different shaft diameters; it can also be installed on other types of testing machines such as compression testing machines, torsion testing machines, bending testing machines, universal testing machines, etc.; various types of fixtures can be matched, and the space occupation is small , easy to operate, high accuracy of repeated adjustment, improve the accuracy of the experiment, and make the measurement data more accurate

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