Multifunctional stretcher capable of being loaded in multiple axial directions

Abstract

The invention discloses a multifunctional stretcher capable of being loaded in multiple axial directions. The multifunctional stretcher comprises a loading platform and a plurality of stretching mechanisms; each stretching mechanism comprises a connecting seat, a electric cylinder, a supporting seat, a sensor and a fixture, an arc key slot type guide rail is arranged on the loading platform, and the connecting seats are arranged on the arc key slot type guide rail and can rotate along the arc key slot type guide rail; and the stretching mechanisms are fixed to the loading platform, the supporting seats are connected with the connecting seats on stretching mechanism bodies, the electric cylinders are disposed on the supporting seats, each electric cylinder is connected with one end of the corresponding sensor, the other end of each sensor is connected with the corresponding fixture, each electric cylinder drives the corresponding fixture to stretch a test sample, the stretching force can be recorded by each sensor in real time, and constant-speed stretching or uniform stretching can be carried out according to actual requirements. The quantity of the stretching mechanisms and corresponding fixing positions of the stretching mechanisms can be adjusted, so that single-axis stretching or multi-axis stretching can be flexibly realized. The multifunctional stretcher overcomes shortcomings that the stretching axial direction of an existing stretcher cannot be flexibly adjusted, and various drivers of the existing stretcher cannot be controlled independently. Besides, the multifunctional stretcher has the advantages of easiness in maintenance and modification, convenience in assembly and disassembly, and the like.

Description

technical field [0001] The invention relates to a stretching machine, in particular to a multifunctional multi-axial stretching machine capable of loading in various ways. Background technique [0002] At present, the stretching machine is mainly composed of a fixture, a sensor, and an electric driver. The fixture clamps the sample to be tested, and the driver stretches the fixture. The force and displacement during the stretching process are measured by the sensor. However, this kind of stretching machine is mostly a uniaxial stretching machine, which has high requirements on the shape of the tensile sample. In practice, many materials, especially soft materials (such as films, rubber, etc.) Tensile experiments cannot accurately measure the mechanical properties of such materials, so it is necessary to measure the load-displacement curve by stretching in various ways (including multiple axial or equiaxial stretching, proportional stretching, etc.). [0003] Most of th...

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Problems solved by technology

However, this kind of stretching machine is mostly a uniaxial stretching machine, which has high requirements on the shape of the tensile sample. In practice, many materials, especially soft materials (such as films, rubber, etc.) Tensile experiments cannot accurately measure the mechanical properties of such materials, so it is necessary to measure the load-displacement curve by stretching in various ways (including multiple axial or equiaxial stretching, proportional stretching, etc.)

[0003] Most of the current stretching machines can only achieve biaxial stretching, and the loading method is manual, and the stretching speed and stretching displacement range cannot be adjusted, which greatly limits the effect of the tensile test

Although the multi-axial stretching machine reported in U.S. Patent US7509882B2 can realize multi-axial stretching, because its stretching mechanism is fixed on the loading platform, it cannot be disassembled freely, and the stretching displacement range cannot be adjusted. The size requirements are high, which limits the scope of the sample, and because the tensile mechanism is fixed, it is inconvenient to install the sample, which affects work efficiency

[0004] Due to the shortcomings of existing stretching machines, the mechanical properties of materials cannot be measured through multiple loading methods, which hinders comprehensive and in-depth research on material properties. Therefore, it is necessary to achieve multi-axial stretching, adjustable stretching speed, Stretching machine with simple structure and convenient use

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