CN-121994590-A - Novel multifunctional fixed experiment platform

CN121994590ACN 121994590 ACN121994590 ACN 121994590ACN-121994590-A

Abstract

The invention relates to a novel multifunctional fixed experiment platform, which belongs to the field of precise clamping test and comprises a support guide assembly, a micro damping moving assembly, a precise control assembly and a clamping fixing assembly. The micro damping moving assembly can greatly reduce the influence of friction force generated by micro deformation of the tested metamaterial to interfere a final experimental result through the guide rail sliding block structure of the micro damping moving assembly, and meanwhile, the precise control assembly has high deformation capacity of degree of freedom and can be suitable for fixing various complex metamaterial structures. The invention solves the problems that the experimental result does not have reality, consistency and accuracy due to the fact that the surface of the universal test platform has a larger friction factor in the ballast and tensioning experiments of the positive poisson ratio and the negative poisson ratio of the traditional metamaterial structure, and the mechanism is applicable to various complex working conditions and has the characteristics of high degree of freedom and high adaptability.

Inventors

WANG XIXIANG
WANG HAN
ZHU YUEMING
LIU ZEHAO
CHEN SHUZHEN
WANG YOUBANG
GAO SONG

Assignees

长春工业大学人文信息学院

Dates

Publication Date: 20260508
Application Date: 20260313

Claims (5)

1. The novel multifunctional fixed experiment platform comprises a support guide assembly (1), a micro damping moving assembly (2), a clamping fixing assembly (3) and a precision control assembly (4), and is characterized in that the support guide assembly (1) comprises a fixing panel (11) and a precision guide rail (12), the fixing panel (11) is in a square structure, through holes are formed in positions close to middle points of side lines of the square, the precision guide rail (12) is in a cross structure, the fixing panel (11) is fixed to the fixing panel (11) and is arranged at a square diagonal position of the top view of the fixing panel (11), the micro damping moving assembly (2) is in four groups, each group of micro damping moving assemblies (2) is arranged on the precision guide rail (12) in the support guide assembly (1), the clamping fixing assembly (3) comprises an upper clamping fixing device (31) and a lower clamping fixing device (32), the upper clamping fixing device (31) is in four groups, the lower clamping fixing device (32) is in four groups, the precision control assembly (4) comprises a bottom arm (41), a middle arm (42), a pin shaft (43) and a movable middle part (43) are connected with the middle part (43), sixteen groups of connecting pins (44) are formed, one end of the bottom movable arm (41) is rotationally connected with the lower clamping and fixing device (32) in the clamping and fixing assembly (3) through the connecting pins (44), two ends of the middle movable arm (42) are respectively rotationally connected with the bottom movable arm (41) and the upper movable arm (43) through the connecting pins (44), and the other end of the upper movable arm (43) is connected with the upper clamping and fixing device (31) in the clamping and fixing assembly (3) through the connecting pins (44).
2. The novel multifunctional fixed experiment platform according to claim 1, wherein the precise guide rail (12) in the support guide assembly (1) comprises guide grooves (12 a), array fixing holes (12 b) and limit baffles (12 c), the guide grooves (12 a) are symmetrically distributed on two sides of the precise guide rail (12), and lubricating grease is coated in the guide grooves (12 a).
3. The novel multifunctional fixed experiment platform according to claim 1, wherein the movable base (2 a) of the micro damping movable assembly (2) is arranged in the guide groove (12 a) of the precise guide rail (12) through the guide rail sliding block structure (2 b), and threaded holes are uniformly distributed on the upper surface of the movable base (2 a).
4. The novel multifunctional fixing experiment platform according to claim 1, wherein in the clamping fixing assembly (3), through holes are uniformly distributed on the upper surface of the clamping bottom plate (31 a), and a fixed mounting mechanism (31 b) is arranged at the edge position of the clamping bottom plate (31 a).
5. The novel multifunctional fixed experiment platform according to claim 1, wherein the mechanism at two sides of the head of the connecting pin shaft (44) in the precise control device (4) is an extension structure, the middle part is an optical axis, and the tail part is a thread structure.

Description

Novel multifunctional fixed experiment platform Technical Field The invention belongs to the field of fixed clamping, and particularly relates to a novel multifunctional fixed experiment platform. Background In recent years, mechanical metamaterials, in particular to structures with negative poisson's ratio effect, programmable mechanical response and large deformation capacity, show important application prospects in the fields of buffering energy absorption, flexible mechanisms, intelligent structures, soft robots and the like. In order to accurately evaluate the mechanical properties of such metamaterials under compression, extension, tension and multiaxial coupling loads, it is often necessary to conduct quasi-static or dynamic loading tests with a universal material testing machine. However, conventional universal test platforms have significant limitations in testing metamaterials. On the one hand, a large friction factor exists between the loading table of the universal testing machine and the sample, and when the metamaterial transversely contracts, rotates or is subjected to complex coupling deformation in the loading process, additional constraint force and additional load are introduced by the friction, so that the real structural response is seriously disturbed. In particular, for negative poisson ratio metamaterials, tensile overall structures and compliant metamaterials, the mechanical behavior of the materials is highly sensitive to boundary conditions, and the traditional rigid fixing mode often leads to insufficient authenticity, consistency and repeatability of test results. On the other hand, the existing fixing and clamping device has low degree of freedom and limited suitability, and is difficult to meet the stable fixing requirements of complex topologies, irregular geometric forms or large deformation structures. In the experimental process, the sample is always required to be allowed to undergo micro follow-up displacement or posture adjustment while ensuring stable clamping so as to avoid unnecessary constraint introduced by human. However, existing experimental platforms often have difficulty achieving an effective balance between "stable fixation" and "low resistance free motion". Therefore, how to construct an experimental fixing platform with high degree of freedom, high adaptability and multiple-working-task applicability on the premise of not changing the structure and structural characteristics of the metamaterial to be tested, which not only can realize high-stability clamping, but also can remarkably reduce friction and additional constraint effects, becomes a key technical problem to be solved in the mechanical property test of the metamaterial. Disclosure of Invention The invention provides a novel multifunctional fixed experiment platform which comprises a support guide assembly, a micro damping moving assembly, a clamping fixing assembly and a precise control assembly, wherein the support guide assembly comprises a fixing panel and a precise guide rail, the fixing panel is in a square structure, through holes are formed in positions close to middle points of square side lines and used for fixing the experiment platform and an experiment environment, the precise guide rail is in a cross structure and is fixed on the fixing panel, and the precise guide rail is arranged in the square diagonal positions of the top view of the fixing panel. The precise control assembly comprises four groups of bottom moving arms, middle moving arms, upper moving arms and connecting pins, wherein the total number of the four groups of the bottom moving arms, the middle moving arms and the upper moving arms is sixteen, one end of each bottom moving arm is rotatably connected with the lower clamping fixing device in the clamping fixing assembly through the connecting pins, two ends of each middle moving arm are rotatably connected with the bottom moving arms and the upper moving arms through the connecting pins, and the other end of each upper moving arm is connected with the upper clamping fixing device in the clamping fixing assembly through the connecting pins. The precise guide rail comprises guide grooves, array fixing holes and limiting baffles, wherein the guide grooves are symmetrically distributed on two sides of the precise guide rail, lubricating grease is coated in the guide grooves, the fact that sliding friction force of the micro damping moving assembly is minimum in the working state is guaranteed, when the micro damping moving assembly is provided with a tested metamaterial structure for experiments, the tested metamaterial structure can drive the micro damping moving assembly to conduct micro displacement due to the inherent deformation attribute of the tested metamaterial structure and the application of external force, friction force of the micro displacement mode is negligible, and particularly when deformation of the tested metamaterial is overlarge, the limiting baffles c