1, Model: DE50A-2
2, Capacity: 2TON
3, Display: LCD
4, Units: KG, N, LB can be switched arbitrarily
5, Decomposition: 1/10,000
6, Precision: ±1% or less
7, Testing space: D1200*W1200*H1000MM (can be customized according to customer requirements)
8, compression speed standard: 10±3 MM/MIN
9, print function: serial number, peak value, average value, can be memorized
10, can be used for holding pressure test (stacking test): can be arbitrarily set the amount of holding pressure
11, motor: Taiwan Imported
12, reducer: Italy imported
13, material: 45 #
14, finished body size: H1850 * L1700 * W1000 MM
15, weight: 600 KG
16, power supply: 1#, AC 220V ■ ■ Sensor bar: screw thermocouple, temperature measurement is sensitive, uniform, high precision.
■Heater: screw-in heater, high power, fast heating and durability.
■Column copper sleeve: brass refined, wear-resistant and non-resistance.
■Power system: the use of special motors, so that the operation is smooth, accurate, no dry sound.
■Safety protection: with emergency protection device, in case of emergency can make the machine stop or reverse. Test material tension range
The different range of tension, determines the use of different sensors, also determines the structure of the tension machine, but the price of this item does not have much impact (except the door type). For general flexible packaging manufacturers, the pulling force range of 1000 kilograms is already enough. Therefore, also decided to use a single-arm type can be. With the single-arm corresponding structure is the door structure, it is adapted to the larger tension, such as a ton or more. So flexible packaging manufacturers are basically not used.
The problem of the test stroke
According to the flexible packaging film needs to test the performance and requirements, the stroke in 600-800mm can be. Material elongation of more than 1000% can choose to travel 1000 or 1200mm.
Standard configuration
Intelligent three basic configurations: host, microcomputer, and printer, if the microcomputer is strong enough to print directly. Also can be equipped with an ordinary computer. With a computer, you can carry out complex data analysis, such as data editing, local zoom, can be adjusted to report the form of statistical analysis into groups of samples.
Output results
Test results output results can be set arbitrarily: maximum force, elongation, tensile strength, fixed elongation, fixed elongation force, yield strength, modulus of elasticity, maximum test force 8. This can be said to be the most comprehensive output when operated by microcomputer.
On the experimental items that can be done.
Flexible packaging requirements tensile machine multi-purpose, that is, equipped with different fixtures on the basis of tensile, compression, bending, tearing, shear, 180 degrees peeling, 90 degrees peeling test.
There are some high-grade tensile machines on the market in addition to the above items, because of its high precision sensors (some up to one in two hundred thousand) can also test the coefficient of friction.
The main configuration of the product machinery:
Transmission, screw drive and rack and pinion drive, the former is expensive, used for high-precision, high test repeatability; the latter is cheap, used for low-precision, low test repeatability.
Screw, the accuracy of the measurement of tension has a decisive role. General have ball screws, trapezoidal screws, general screws. Among them, the ball screw has the highest accuracy, but its performance depends on the computer servo system operation to play, the whole set of price is also more expensive. The use of general screws and trapezoidal screws can achieve the required accuracy of flexible packaging, that is, 0.5-1% accuracy
Transmission, gear drive and chain drive, the former is expensive, for high precision; the latter is cheap, for low precision.
Sensors, the main cost of life, photoelectric sensing is one of the more advanced technology, generally available more than 100,000 times, but Shanghai Trust Instrument Co., Ltd. uses the sensor is the United States, high precision, generally available more than 150,000 times
Test speed.
Market equipment, some in the 10 ~ 500 mm/min, some in the 0.01 ~ 500 mm/min, the former generally use the ordinary speed system, the cost is low, rough impact on the accuracy; the latter use servo system, expensive, high precision, for flexible packaging enterprises, the choice of servo system, speed range 1 ~ 500 mm/min is enough, so that neither affect the accuracy, the price is within a reasonable range. Precision, price and within reasonable limits.
Measurement accuracy. Precision issues, including force accuracy, speed accuracy, deformation accuracy, displacement accuracy. The highest value of these accuracies can reach plus or minus 0.5, but for general manufacturers, 1% accuracy is enough. In addition, the resolution of the force value can almost always reach one part in two hundred and fifty thousand. Reasons for error
1. Incorrect installation of the test machine error
The test machine is not installed horizontally, will increase the friction between the moving parts, affecting the vertical installation, which will bring error to the test machine.
(1) the host part of the installation is not level
The working piston and the working cylinder will produce friction between the test machine working platform and the side column between the guide wheel will also produce friction, thus generating errors, generally manifested as a positive difference, and the error decreases with the increase of the load.
(2) the force gauge part of the installation is not level
If the force gauge before and after the installation is not level, will make the pendulum bearing friction between the bearings, the error is generally negative.
Combined the above two factors produce errors are characterized by a large impact on small loads, small impact on large loads.
2 friction resistance error
(1) the host part of the friction resistance
Hydraulic testing machine friction resistance mainly occurs between the working cylinder and the working piston. In addition to the installation of uneven factors, there is dirt in the cylinder, the viscosity of the oil is too large, will also cause the friction resistance to increase. In addition, the working platform guide wheel position is not appropriate will also cause and one side of the column friction increases.
(2) dynamometer part of the frictional resistance
The dynamometer produces frictional resistance for more reasons, such as force measuring cylinder and force measuring piston between the dirt, the viscosity of the oil is too large, the friction of the follower needle on the indicator device, gear rod on the gear rod oil, dirt, or the upper limit of the rod piece of the upper limit is pressed too tightly, the force measuring piston belt wear and tear fracture, and so on.
Error elimination method
For the above error, should first check whether the test machine installation level, the host with a box level in the work of the outer ring of the cylinder perpendicular to each other in two directions to find level. For the force gauge in the front of the pendulum to adjust the level of the front and rear of the force gauge, the edge of the pendulum and the inner engraved line aligned with the fixed, with a level ruler against the side of the pendulum to adjust the level of the body left and right. The oil cylinder dirt can be drained and cleaned and replaced with oil of suitable viscosity. Dynamometer indicator device from the needle friction is too large, gear rod is too dirty, can be cleaned with gasoline and adjust the pressure screws and gear rod upper limit piece, replace the belt on the force piston, these can be achieved to eliminate the purpose of the error, so that the test machine to achieve the qualified use of the state