What are the main configurations of tensile testing machines?

Tensile testing machine is also known as universal material testing machine. The universal testing machine is a mechanical afterburner test machine used for mechanical properties such as static loading, tensile, compression, bending, shearing, tearing, peeling, etc. for various materials. How much do you know about the tensile testing machine? The following editor will introduce the selection and main configuration of the tensile testing machine to you in detail.

1. Purchase of tensile testing machines

Test material tension range

The different tension ranges determine the different sensors used, which also determines the structure of the tension machine, but this item has little impact on the price (except for the gantry). For general flexible packaging manufacturers, the tension range of 1,000 kg 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.

Problems with 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.

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.

Output result

The output results of the test results can be set arbitrarily: maximum force value, elongation, tensile strength, constant elongation, fixed elongation value, yield strength, elastic modulus, and maximum test force. This can be said to be the most comprehensive result output when operating a microcomputer.

On experimental projects.

Flexible packaging requires that one tension machine is used for multiple purposes, that is, on the basis of equipped with different fixtures, tensile, compression, bending, tearing, shear, 180-degree peeling, and 90-degree peeling tests can be performed.

In addition to the above items, some high-end tensile machines on the market can also test the friction coefficient because of their high sensor accuracy (some reach one in 200,000).

2. Main configuration of tensile testing machine

The transmission has lead screw transmission and rack transmission. The former is expensive, used for high accuracy and has high repeatability for tests; the latter is cheap, used for low accuracy and has low repeatability for tests.

The lead screw has a decisive effect on the measurement of tension accuracy. Generally, there are ball screws, trapezoidal screws, and general screws. Among them, the ball screw has the highest accuracy, but its performance can only be achieved by operating the computer servo system, and the whole set is also relatively expensive. The accuracy required by the flexible packaging can be achieved by using general lead screws and trapezoidal lead screws, that is, 0.5-1% accuracy

Drive, with geared and chain drive, the former is expensive for high precision; the latter is cheap for low precision.

The main cost of sensors lies in their lifespan. Photoelectric induction is the most advanced technology, which is generally available for more than 100,000 times. However, the sensors used by Jinan Pinde Testing Machine Co., Ltd. are from the United States, with high accuracy and generally available for more than 150,000 times.

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 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.

Measurement accuracy. Accuracy issues, including force measurement accuracy, speed accuracy, deformation accuracy, and displacement accuracy. These accuracy values ​​can reach a maximum of 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 250,000.

The above is the selection and main configuration of the tensile testing machine shared by the editor. I hope it can help everyone!