Functional characteristics, test methods and use and inspection of tensile testing machines
First, the main function of the tensile testing machine
1. Completion of various preventive safety mechanics performance test according to the regulations, computer control professional test safety belt (envelope belt, fence rope, safety rope, belt), bamboo (wood) ladder, helmet, buckle, Equipment for soft materials such as pedals and waist ropes.
2, computer control, liquid crystal display, can arbitrarily set parameters, display the afterburning curve, and at the same time can display the fracture value of the sample, automatically form a test report, print the test results and automatically save.
3, pull, pressure force measuring machine, can dynamically display the tension curve of tension and pressure. Smooth loading, no overshoot, switchable manual / automatic operation, making operation more convenient, more accurate test, peak recording (usually used for destructive tests such as helmets).
4. Set parameters by yourself to test the tensile and pressure tests of other soft and hard materials, and automatically memorize the parameters that have been set. Has a century-old maintenance-free calendar clock.
5, with hydraulic overload process protection function, dynamic tracking full range of anti-out of control function. With pressure holding function, the holding time can be set arbitrarily. In the pressure holding section, when the force value of the workpiece falls, the force is automatically compensated. The computer can be automatically loaded according to the set force value and the dwell time, and the pressure is maintained and unloaded.
Second, tensile testing machine performance
1. The project is complete. It can test the mechanical properties of all power safety tools such as seat belts, buckles, bamboo (wood) ladders, lifting plates and helmets.
2, you can set the parameters to do other mechanical tests of soft and hard materials.
3, Chinese menu display, man-machine dialogue operation.
4, the test process microcomputer control, liquid crystal display, micro printer print test results.
5, the load is stable, no overshoot phenomenon, can switch manual / automatic operation, making the operation more convenient and the test more accurate.
6, with a peak record (usually used for destructive tests such as helmets).
7, the machine pull, pressure test, can dynamically display the tensile force of the pull, pressure, and has a print function.
Third, tensile testing machine structural characteristics Tensile testing machine consists of two parts: test display and afterburning equipment (such as the need to test the helmet with the helmet test bench), the test display part by the pressure sensor, control keyboard, LCD screen, micro-printer, Manual button and so on. The keyboard uses the film touch button, the hand feel is good, the liquid crystal display is Chinese menu type, the operator can select the corresponding name menu according to the test object, when the test result needs to be printed, the test report can be printed, which is convenient for the record check.
The machine is equipped with two sensor interfaces, the sensor 3kN and the sensor 50kN are used for testing safety tools, and the helmet test is dedicated for testing helmets. Both sensors can be used alone or simultaneously. It can meet the requirements and work requirements of different environment of use, stable performance and accurate test results.
Fourth, tensile testing machine test method
1. Impact performance test
(1) Connect the helmet test sensor to the helmet tester sensor interface
(2) Turn on the power before the test. When the “Tiansheng Electric Welcome You!†screen appears on the display, press the test button and use the arrow keys (↑) (↓) to move the cursor to the “Hard Hatâ€. Press the Enter key, the words “1 helmet impact method†and “2# helmet piercing†appear. At this time, the electromagnet is energized to generate magnetic force. The plane of the hammer head is aligned under the electromagnet to make the electromagnet and the center of the hammer head. Use the arrow keys (↑) (↓) to move the cursor and press the enter key to enter the corresponding test state. When the “drop, drop†sound appears, the drop hammer test can be performed. (The hammer impact must be completed within 5 seconds after listening to the sound), and The impact data is displayed after a few seconds, and if the impact force is less than 4.900 kN, the test passes. To print, press the Print button to print out the test report. Reset exits. When you make another helmet, press Test to start repeating the above steps.
2, puncture resistance test
Putting a good safety helmet on the head mold, and placing an electrode of the electrical contact device between the helmet and the head mold, the electrode is made of aluminum sheet, such as a steel cone contacting the electrode to form a closed loop. Turn on the power before the test. When the “Tiansheng Electric Welcomes You!†screen appears on the display, use the steel cone to drop from the height of 1m into the 100mm center of the top of the puncture helmet. Press the test button and use the direction keys. ↑) (↓) Move the cursor to the “Hard Helmet†and press the Enter key. The words “1#Safety Cap Impact†and “2#Safety Cap Puncture†appear. At this time, the electromagnet energizes to generate magnetic force, and the puncture hammer plane is aligned with the electromagnetic Below the iron, the electromagnet is brought into contact with the center of the piercing hammer. Use the arrow keys (↑) (↓) to move the cursor and press the enter key to enter the corresponding test state. When the “drop, drop†sound appears, the drop hammer test can be performed. (The hammer impact must be completed within 5 seconds after listening to the sound), and After a few seconds, it is shown whether or not the puncture is passed. Reset exits. When you make another helmet, press Test to start repeating the above steps.
5. Use and inspection of safety equipment
1. The visual inspection before use of safety equipment shall include the presence or absence of cracks, aging, loss of insulation layer, serious scratches in the insulation part, and whether the fixed joint part is loose, rusted or broken. If there is any doubt about the appearance of the insulation part, it should be tested before passing the insulation test.
2. Insulated operating rod, electroscope and measuring rod: The allowable voltage should be consistent with the voltage level of the equipment. When using, the operator's hand must not cross the boundary of the guard ring or the hand-held part. In the outdoor operation of electrical equipment in rainy days, the insulating part of the operating lever should have a rain cover or an operating lever with an insulator. The human body should be kept at a safe distance from the live equipment during use, and care should be taken to prevent the insulation rod from being short-circuited by the human body or equipment to maintain an effective insulation length.
3. Portable short-circuit grounding wire: The clamps at both ends of the grounding wire should ensure that the grounding wire can be in good contact with the conductor and the grounding device, easy to assemble and disassemble, have sufficient mechanical strength, and will not loosen when the large short-circuit current passes. The portable grounding wire should be inspected before use. If it is found that the stranded strands, broken strands, severely damaged jacket, loose joints, etc., it should not be used.
4. Insulating partitions and insulating covers: Insulating partitions and insulating covers are only allowed to be used on electrical equipment with voltages of 35kV and below, and should have sufficient insulation and mechanical strength. For the 10kV voltage class, the thickness of the insulating spacer should not be less than 3mm, and the voltage level for 35kV should not be less than 4mm. When placing insulation barriers and insulating covers on site, wear insulated gloves, use insulated levers, and if necessary, secure them with insulated ropes.
5. Safety helmet: Before using the helmet, check the accessories such as the cap, cap liner, cap hoop, top lining and chin strap. When using, the chin strap should be fastened to prevent the machine from falling backwards or other reasons.
6, seat belt: belt and belt, rope should have sufficient mechanical strength, the material should have wear resistance, the snap ring (hook) should have a safety device, the operation should be flexible. The length of the belt and rope is more than 3m.
7, foot buckles and ascending board: metal parts deformation and rope (belt) damage is prohibited. Anti-slip measures should be taken for the use of foot buckles and ascending boards for special weather.
Dear Customer:
Thank you for your attention to our products. In addition to this product introduction, the company also introduces AC and DC voltage divider, current riser, dielectric loss tester, transformer volt-ampere characteristic tester, etc. If you are interested in us The products are interested in consulting. Thank you!
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