橡胶拉力机测试橡胶的要求

Requirements for rubber testing by rubber tension machines

1.大行程。

1. stroke.

由于橡胶在拉伸时变形量很大，尤其是乳胶制品，伸长率有可能高达1000%以上。所以在橡胶试样断裂之前，必须保证夹持器有足够的行程。

The elongation of rubber can reach as high as 1000% because of the great deformation of rubber in the tensile process, especially the latex products. Therefore, it is necessary to ensure that the holder has enough travel before the fracture of the rubber specimen.

2.高精度及高频率的数据采集。

2. high precision and high frequency data acquisition.

拉伸橡胶不需要很大的力，拉力测量范围不需要很大，所以需要力值的精度较高。一般要求试验机能够求取小数点后两位以上精度的力值。此外由于检测橡胶拉伸性能需要拉伸过程中的数个拉力值，而拉伸试验又不可重复，所以即时准确记录每个试验段的拉力力值对于试验成败起着非常重要的作用。

Tensile rubber does not require a lot of force, tension measurement range does not need to be large, so the accuracy of the force value is higher. Generally speaking, the testing machine can obtain the force value of more than two points after the decimal point. In addition, due to the detection of rubber tensile properties needs several tension during tensile test and tensile test value, and can not be repeated, so instantly and accurately record each test section of the tensile stress plays a very important role in the success of the test.

3.准确的标距测量和记录装置。

3. accurate gauge distance measurement and recording device.

试样标距的测量是计算橡胶伸长率的重要数据，所以橡胶拉伸试验中拉力试验机必须准确地测量试样的应变量，并即时地记录下来。

The measurement of the gauge distance is an important data to calculate the elongation of rubber, so the tensile test machine must accurately measure the strain of the sample in the tensile test of rubber, and record it immediately.

4.可以准确描述应力-应变曲线的装置。

4. a device that can accurately describe stress strain curves.

拉伸试样中的拉力值和标距之间有着密切的联系，例如：试样的定伸应力需要测量试样拉伸到给定伸长率的力值，而定应力则需要测量试样拉伸到给定应力的标距。试验完成后，准确的应力-应变曲线可以再现试验过程，并清晰的反映每个试验段的数值，便于计算试验要求的项目。

In a tensile specimen and standard tension values are closely linked, for example: the distance between the specimen tensile stress to measure tensile elongation at a given stress, and stress to tensile stress measurement to a given gauge. After the test is completed, the accurate stress-strain curve can reproduce the test process, and clearly reflect the value of each test section, easy to calculate the test requirements of the project.