Difference between electronic testing machine, hydraulic tensile testing machine and universal material testing machine

Definition and overview of tensile testing machine:

Tensile machine is also known as tensile testing machine. It is used to test the mechanical properties of materials such as tensile, compression, bending, shearing and stripping. It is suitable for testing various physical and mechanical properties of plastic plates, pipes, profiles, plastic films, rubber, wire and cable, waterproof coil, metal wire and other materials Research institutes, commodity inspection and arbitration institutions, colleges and universities, as well as rubber, tire, plastic, wire and cable, shoe-making, leather, textile, packaging, building materials, petrochemical, aviation and other industries, are indispensable testing equipment for material development, physical property test, teaching research, quality control, incoming inspection, random inspection of production line, etc Different materials need different fixtures, which is also an important factor for the test to be carried out smoothly and the accuracy of test results.

Precautions for purchasing tensile testing machine:

1、 The tensile range of the material to be tested should be considered first.

The different range of tension determines 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 door type). For general flexible packaging manufacturers, the tension range of 100 Newtons is enough. Therefore also decided to use the single arm type.

Corresponding to the single arm structure is the door structure, which is suitable for relatively large tension, such as one ton or more. So flexible packaging manufacturers basically do not need.

2、 Test travel.

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

3、 Standard configuration of tensile testing machine.

Intelligent three basic configuration: host, microcomputer, and printer, if the microcomputer function is strong, can directly print. It can also be equipped with ordinary computer. With the help of computers, complex data analysis can be carried out, such as data editing, local enlargement, report form adjustment, and group statistical analysis.

If equipped with a computer, the manufacturer should add the corresponding control system.

4、 Output results of tensile testing machine.

The output results of test results can be set arbitrarily: maximum force value, elongation, tensile strength, constant elongation, constant elongation force value, yield strength, elastic modulus, maximum test force. This can be said to be the most comprehensive output of microcomputer operation. Some foreign manufacturers can generally export these 8 items. Some domestic manufacturers can output 5-6 items, while others can only output the maximum force value, average value and minimum value.

5、 In the experimental project.

Flexible packaging requires a multi-purpose tensile machine, that is, on the basis of different fixtures, it can be used for tensile, compression, bending, tearing, shearing, 180 degree stripping and 90 degree stripping tests.

There are some high-grade tension machines on the market. In addition to the above items, they can also test the friction coefficient due to their high sensor accuracy (some up to 1 / 250000).

6、 Main configuration of product machinery:

Transmission, there are screw drive and rack drive, the former is expensive, used for high precision, high repeatability test; the latter is cheap, used for low precision, low test repeatability.

The lead screw plays a decisive role in the measurement of tension accuracy. Generally, there are ball screw, trapezoid screw and general screw. Among them, the ball screw has the highest accuracy, but its performance depends on the operation of computer servo system, and the whole set of price is relatively expensive. Generally speaking, the precision of flexible screw can reach 1.5%.

Transmission, there are gear drive and chain drive, the former is expensive, used for high precision; the latter is cheap, for low precision.

The main cost of the sensor lies in its service life. Photoelectric induction is a relatively advanced technology, which can be used more than 100000 times. The imported and domestic joint venture manufacturers can achieve better technology. Shanghai xinrenda Instrument Co., Ltd

7、 Test speed.

Some of the market equipment is in the range of 10 ~ 500 mm / min, and some are between 0.001 ~ 500 mm / min. the former generally uses ordinary speed control system, which has low cost and rough influence on precision; the latter uses servo system, which is expensive and has high precision. For flexible packaging enterprises, it is enough to select servo system with speed range of 1 ~ 500 mm / min, which will not affect the accuracy and the price is within a reasonable range. Vortex Flowmeter

8、 Measurement accuracy.

Precision problems include force measurement accuracy, velocity accuracy, deformation accuracy and displacement accuracy. These precision values can reach up to plus or minus 0.5. But for general manufacturers, 1% accuracy is enough. In addition, the force resolution can almost reach 100000 parts of the tensile machine

Technical parameters of tension machine:

1. Accuracy grade: 0.5 grade

2. Force measurement accuracy: 1n

3. Speed accuracy: < 1% of the indicated value

4. Test speed: 0.5mm/min-500mm/min 14 gear speeds (please specify when there are special requirements) (test speed: 0.001mm/min-500mm / min) multiple gear speeds

5. Measuring range: 50N, 100N, 200N, 500N, 1000N, 2000N, 5000n

6. AC220: power supply

Hy-0580 series microcomputer controlled electronic tensile testing machine is a precision single arm high-grade testing machine, which adopts single-chip microcomputer and PC