Do you know these tips for purchasing a tensile testing machine?
The tensile testing machine has been widely used in the market. It is developed for testing various physical and mechanical properties of various metal or non-metal materials, and is an indispensable testing equipment for physical testing, teaching research, and quality control. When purchasing a testing machine, what aspects should we pay attention to? Let's take a look below.
One, confirm the demand
Determine what tests the company's products need to be tested. Tensile testing machine is also called universal material testing machine. It can test the elongation, elongation, tensile and compressive strength of various materials and finished lamps. It can also do tearing, bending, peeling, compression and Anti-folding lamp test. Different tensile testing machines have different models and corresponding fixtures, so the price will naturally be different.
Second, the tension problem
The different pulling force range determines the different sensors used, and also the structure of the pulling machine, but this item has little effect on the price (except for the door type). For general flexible packaging manufacturers, a pulling force range of 100 Newtons is sufficient. Therefore, it was decided to use a single-arm type. The structure corresponding to the single-arm type is the door type structure, which is suitable for relatively large pulling forces, such as one ton or more. Therefore, flexible packaging manufacturers basically do not need it.
Three, the problem of the test itinerary
This needs to be determined according to your own products. Generally, the stroke of the tensile machine on the market is between 600mm-800mm-1000mm. If it is the parts and materials of the test product, it is with most manufacturers.
Four, output results
The test result output result can be set arbitrarily: 8 items of maximum force value, elongation rate, tensile strength, constant elongation, constant elongation force value, yield strength, elastic modulus, and maximum test force. This can be said to be the most comprehensive result output during microcomputer operation. The products of some foreign manufacturers can generally export these 8 items. Some domestic manufacturers can output 5-6 items, and some manufacturers can only output the maximum force value, the average value, and the minimum value.
Five, test speed
The speed stipulated by the national standard is 200mm/min, and the speed on the market is between 10-500mm and 0.1-500mm/min. The former generally uses an ordinary motor, stepless speed change, the accuracy is relatively low, and naturally the price is relatively cheap; the latter uses a servo motor, a computer servo system, with higher accuracy and higher resolution. Manufacturers can make a reasonable choice according to actual needs.
Six, accuracy issues
This includes speed accuracy, force measurement accuracy, displacement accuracy and deformation accuracy. The highest value of these accuracy can reach ±0.5. For general manufacturers, an amplitude of 1% accuracy is sufficient for use. In addition, the force resolution can basically reach one hundred thousandths.
The above six points are the main points for you to buy a tensile testing machine. I hope to help you so that you can buy a suitable and satisfactory testing machine.