8 aspects to master the selection of electronic tensile testing machines

Testing machines are available in a variety of styles and models, the sameTension testerIt is also divided into different performance and different types of tensile testing equipment. Different test machines are selected according to different materials. The following are the precautions for selecting thin film tensile testing machines:

1. First, consider the need to test the tension range of the material.

The different tensile ranges determine the difference in sensors used, which also determines the structure of the tensile tester, but this item has little impact on the price (except for the gantry). For general flexible packaging manufacturers, the tension range of 100 Newtons is enough. Therefore, it is also decided to use a single-arm type.

The corresponding structure to the single-arm type is a gate-type structure, which adapts to relatively large tension, such as one ton or more. Therefore, flexible packaging manufacturers are basically not available.

2. Issues of test itinerary.

According to the performance and requirements of the flexible packaging film, the stroke is 600-800mm. If the material elongation exceeds 1000%, the stroke can be 1000 or 1200mm.

3. Standard configuration issues.

Three basic configurations of intelligence: host, microcomputer, and printer. If the microcomputer has strong functions, you can print directly. In addition, it can also be equipped with a normal computer. With a computer, complex data analysis can be carried out, such as data editing, local amplification, and the report format can be adjusted, and statistical analysis of group styles can be carried out. If you use a computer, the manufacturer should add the corresponding control system.

4. Output result.

Tension testerThe output results of the test results can be set arbitrarily: force value, elongation, tensile strength, constant elongation, fixed elongation value, yield strength, elastic modulus, and test force. This can be said to be a comprehensive result of the output when the microcomputer is operated. Products from some foreign manufacturers can generally output these 8 items. Some domestic manufacturers can output 5-6 items, while some manufacturers can only output three items: force value, average value and small value.

5. Measurement accuracy.

Accuracy issues, including force measurement accuracy, speed accuracy, deformation accuracy, and displacement accuracy. These accuracy values ​​can reach plus or minus 0.5. But for ordinary manufacturers, achieving 1% accuracy is enough. In addition, the force value resolution can almost reach one in a hundred thousand.

6. Test speed.

Some of the market equipment are 10~500 mm/min, and some are 0.01~500 mm/min. The former generally uses ordinary speed control systems, which are relatively low in cost and rough affects accuracy; the latter uses servo systems, which are expensive and have high accuracy. For flexible packaging companies, if you choose a servo system, the speed control range of 1~500 mm/min is enough, which does not affect the accuracy, and the price is within a reasonable range.

7. On the experimental projects that can be done.

Flexible packaging requirementsTension testerOne machine is multi-purpose, that is, on the basis of equipped with different fixtures, it can be used for tensile, compression, bending, tearing, shear, 180-degree peeling, and 90-degree peeling tests. In addition to the above items, some tensile machines on the market can also test the friction coefficient because of their high sensor accuracy (some reaching three-tenths of a hundred thousand).