Define and sum up:
Pulling force machine calls the testing machine of pulling force too, pulling force machine is a testing machine of mechanical thrust augmentation used for using the performance test of mechanics of drawing, compressing, bending, shearing, stripping etc. to the material, suitable for plastic panel, pipe, different material, mechanical function test of various physics of materials such as the plastic sheeting and rubber, electric wire cable, waterproof roll material, wire,etc., it uses trade ranges to spread all over: Scientific research institutions, trades such as arbitration organ of commodity inspection, universities and colleges and rubber, tire, plastics, electric wire cable, shoes-making, leather, textile, packaging, building materials, petrochemical industry, aviation,etc., it is indispensable checkout equipments such as material development, test of properties of matter, teaching research, quality control, charge-in examining, random test of the production line,etc., pulling force machine jig, as the important component of the instrument, different materials need different jigs, also could test an important factor of going on smoothly and test result accuracy level.
Choose attentive matters:
First, should consider needing to test the material pulling force range at first.
The difference of the pulling force range, has determined the difference of the sensor used, has just determined the structure of the pulling force machine, but this item impact on price strong ‘ Except the door type) . As to the general soft-packing manufacturer, the pulling force range has been already enough in 100 newtons. So the one that has determined the single arm adopting type is all right.
Structure of corresponding to single arm type is the door type structure, it meets greater pulling force, or more such as one. So the soft-packing producer is basically needless.
Second, test the question of the journey.
Performance and requirement tested according to the needs of membrane of soft-packing, the journey is all right in 600- 800mm. Whether over 1000% of extending rate of material can select journey 1000 or 1200mm for use.
Third, standard configuration question.
Intelligent three kinds are basically disposed: Host computer, microcomputer, having printers, if the microcomputer function is strong can be printed directly. In addition can also allocate the ordinary computer. There are computers, can carry on the complicated data analysis, such as the data editor, the part is enlarged, can adjust and report the form, carry on the statistical analysis of the ganged style.
If worthy of using the computer, the producer should join the corresponding control system.
Fourth, output the result.
The test result can be set up arbitrarily while outputting the result: Worth in a more cost-effective manner most, person who extend, tensile strength, strength extend, extend force value, surrender the intensity definitely definitely, 8 items the modulus of elasticity, greatest experimental strength. Can be said when the microcomputer is operated, the most overall result outputted in this. The products of some foreign producers, can generally export these 8 items. The producer that has at home can export 5-6, it is in a more cost-effective most manner worth that some producers can only export, the average, three minimums.
Fifth, in doing experiment projects.
A machine of pulling force machine of soft packing instructions is multi-purpose, in allocating the foundations of different jigs, can do drawing, compressing, bending, tearing, shearing, 180 degrees stripping, 90 degrees to strip and test.
There are some top-grade pulling force machines besides the above project on the market, because its sensor is tall in precision (some are up to 3/100,000) Can also test the coefficient of friction.
Sixth, products machinery are mainly disposed:
Transmission, there are transmission and rack transmission of guide screw, the former is expensive, used in high precision, test high repetitiveness; The latter is used in the low precision, test low repetitiveness cheaply.
Guide screw, measure the precision of pulling force and have decisive actions. The general ones include ball guide screws, ladder-shaped guide screw, general guide screw. Among them, ball accuracy of guide screw most high, but full play of performance its want, give play to by the intersection of computer and servo system operation, a whole set of price is more expensive too. Adopting general guide screw and ladder-shaped guide screw can reach the required precision of the soft-packing, namely precision 0.5- 1%.
Transmission, there are transmission of gear and roller chain transmission, the former is expensive, used in high precision; The latter is used in the low precision cheaply.
The sensor, the prime cost lies in the life-span, photoelectric reaction is more advanced technology among them, can generally use 100,000 or more times, import and enter into partnership in the producer partly and reach at home? ? ? .
Seventh, experimental speed.
Business apparatus some, in 10~500 mm/min, some, in 0.01~500 mm/min, the former generally uses and adjusts the speed ordinarily systematically, it influences the precision that the cost is relatively low, coarse; The latter uses the servo system, costs an arm and a leg, the precision is high, as to the soft wrapping enterprise, select the servo system for use, the ones that adjusted range 1~500mm/min of the speed are enough, so neither influences the precision, the price is within the reasonable range.
Eighth, measure the precision.
Precision question, including dynamometry precision, speed precision, the precision out of shape, displacement precision. The precision value can up to, shoulder 0.5 while being most high. But to the general producer, it is enough to reach precision 1%. In addition, the resolution ratio of strength value can nearly all be up to 1/100,000.