Ultra-fast stretching device combined with X-ray scattering and experiment method of ultra-fast stretching device
An experimental method and technology of stretching device, applied in measuring device, using stable tension/pressure test material strength, instrument, etc., can solve the problems of affecting torque, rotation speed, influence, etc., and achieve a large range of tension and accurate control. , the effect of increasing the ultimate strain rate
Active Publication Date: 2017-05-31
UNIV OF SCI & TECH OF CHINA
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When the power of the power source is constant, the moment of inertia of the whole system and the transmission part will affect the effect of the experiment; for the roller shaft stretching, under the same maximum torque and rotational angular velocity, the radius of the fixture part will affect the torque and speed coupling
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[0033] The present invention will be further described below in conjunction with the accompanying drawings and examples.
[0034] See attached figure 1 , an ultra-fast stretching device combined with X-ray scattering, including two high-precision servo motors 1, a motion controller 2, a torque sensor 3, an angle sensor 4, a hollow roller clamp 5, and a braking control device 6 , a separate transmission mechanism 7, and a polymer film sample 8, wherein two high-precision servo motors 1 perform synchronous linkage stretching of the sample through a motion controller. The two high-precision servo motors 1 are first accelerated to the highest speed (3000 rpm), and then the separate transmission mechanism 7 is controlled by the brake control device 6 to start the sample stretching. At the same time, the hollow roller clamp 5 is used to increase the stretching speed at the same motor speed so as to increase the strain rate. After testing and modeling the stretching process, the co...
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The invention provides an ultra-fast stretching device combined with X-ray scattering and an experiment method of the ultra-fast stretching device. The device is synchronously driven by two YASKAWA servo motors and mechanical loss caused by mechanical transmission is reduced. A torque sensor is arranged at one end of the device and is used for detecting changes of stress in a stretching process. According to the device provided by the invention, acceleration and deceleration time of the stretching process are shortened through utilizing a separation type transmission mechanism; the rotary speed of the motors is effectively utilized and the strain speed is improved. A stretching mechanism of the device adopts a hollow detachable roller and the rotary inertia of the mechanism is reduced; the linear speed is improved under the same rotary speed and a plurality of types of mounting modes can be provided and are matched with testing requirements of different samples and utilization conditions. The device adopts forced nitrogen gas flow and guarantees the uniformity of the temprature of a sample cabin; the thermal degradation of a sample at high temperature is reduced. The ultra-fast stretching device has the advantages of easiness of detachment and installation and the like and is very suitable for combination with a synchrotron radiation experimental station; more favorable conditions are provided for researches of crystallization behaviors of polymer melts under non-balance conditions.
Description
technical field [0001] The invention relates to the technical field of using synchrotron radiation X-ray scattering to study the relationship between polymer structure evolution and external field parameters, in particular to an ultra-fast stretching device combined with X-ray scattering and an experimental method thereof. Background technique [0002] Under industrial production and service conditions, materials often need to experience ultra-high-speed strain rates and are in non-equilibrium conditions. It is of great significance to study the structure evolution of polymer materials under the action of ultra-high-speed external field for the industrial processing of polymers. The basic idea commonly used in this research is to apply a flow field to the material under set temperature, pressure and other conditions, and use different optical means to analyze the structure and performance characteristics of different scales. For the uniaxial extensional flow field, the tens...
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IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/005G01N2203/0017
Inventor 李良彬鞠见竹王震叶克孟令蒲
Owner UNIV OF SCI & TECH OF CHINA