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How to choose tensile testing machine

Source：Chengde Jinjian Testing Instrument Co., Ltd　  　Views：289　  　Time：2021-01-26

Tensile testing machine is an instrument that can provide up and down adjustable speed movement. With force sensor and microcomputer or computer, it can stretch, compress, bend, tear, 90 ° peel off, pull-out force and elongation of rubber, plastic, film, textile, fiber, polymer material, composite material, safety belt, adhesive tape, alloy material and other non-metallic materials And other test instruments. How to buy tensile testing machine? Do you know that? Do not know friends can see the following article.

The tensile properties of the instrument play a key role

Testing the tensile properties of rubber samples is one of the important indicators of rubber quality testing. Almost all the quality laboratories of rubber related industries will be equipped with one or more rubber tensile testing machines. But the author found in the maintenance, in fact, many laboratory rubber tensile testing machine configuration may not be able to fully meet the requirements of the relevant standards. This is not only due to the unprofessional selection personnel of the user testing machine, but also due to the inadequate communication of the sales personnel of the manufacturer.

1、 First of all, we should understand: what data do we need?

The results are as follows: 1. The maximum force (tensile strength) of the specimen in the process of tensile fracture;

2. The force value (fracture strength) of the specimen at fracture;

3. The stress corresponding to yield point (tensile stress at yield point);

4. The force value when the specimen is stretched to a given elongation (constant elongation stress);

5. The elongation of the specimen when it is stretched to a given stress (constant stress elongation);

6. Elongation corresponding to yield point (yield point elongation);

7. Elongation at break (elongation at break).

2、 According to the above parameters.

There are two data to be tracked in the process of rubber tensile test: tensile force value and gauge distance change.

Therefore, the rubber tensile testing machine used to test the tensile properties of rubber must meet the following four requirements:

1. Big trip.

2. High precision and high frequency data acquisition.

3. Accurate gauge distance measurement and recording device.

4. A device that can accurately describe the stress-strain curve.

3、 Selection of rubber tensile testing machine for testing personnel

Based on the above, the tester chooses a suitable rubber tensile testing machine according to the following methods

1. Travel range of testing machine.

2. Tension measuring and recording device of rubber tensile testing machine.

3. Gauge distance measuring and recording device of testing machine.


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