[Related] Functional features and test methods of tensile testing machine Did you know?

Tensile testing machine features, test methods and use and inspection

First, the main function of tensile testing machine

1、Perform the performance tests of all kinds of preventive safety mechanic tools according to the procedures. The computer-controlled professional test safety belts (entrainment belts, surrounding ropes, safety ropes, belts), bamboo (wood) ladders, safety helmets, and buckles. The use of soft materials such as pedals and waist straps.

2, computer control, liquid crystal display, can be arbitrarily set parameters, display the forcing curve, at the same time can display the break value of the sample, automatically form a test report, print the test results and automatically save.

3, pull, pressure dynamometer, can dynamically display pull, pressure force curve. Smooth loading, no overshoot phenomenon, manual/automatic operation can be switched, making operation more convenient, testing more accurate, peak recording (used in destructive tests such as helmets).

4, self-set parameters for other soft and hard material pull, pressure test performance test, and automatically memorize the parameters have been set. Has a hundred years maintenance-free calendar clock.

5, with hydraulic overload process protection, dynamic tracking throughout the range of anti-control function. With pressure keeping function, the pressure holding time can be arbitrarily set. In the hold pressure section, the force is automatically compensated when the force value of the workpiece falls. The computer can automatically load, hold, and unload according to the set force and holding time.

Second, tensile testing machine instrument performance

1. The project is complete. It can be used to test the mechanical properties of all electrical safety tools such as safety belts, buckles, bamboo (wood) ladders, lifting plates, and safety helmets.

2. You can set parameters to do other mechanical properties of soft and hard materials.

3, Chinese menu display, man-machine dialogue operation.

4, the test process microcomputer control, liquid crystal display, micro-printer prints the test results.

5, stable loading, no overshoot phenomenon, can be switched manually / automatic operation, making the operation more convenient and more accurate test.

6, with a peak record (used in destructive tests such as helmets).

7, the local pull, pressure test, dynamic display tension, pressure force curve, and has a print function.

Third, tensile testing machine structural characteristics

Tensile testing machine is composed of two parts, test display and afterburner (if need to test safety helmet and helmet test bench), the test display part consists of pressure sensor, control keyboard, liquid crystal display, micro printer, manual button and other components. The keyboard uses thin-film touch keys, and has a good feel. The liquid crystal display is a Chinese menu type. The operator can select the corresponding name menu according to the test subject. When the test results need to be printed, a test report can be printed, which is convenient for filing inspection.

The machine is equipped with two sensor interfaces. The sensor 3kN and sensor 50kN are used for testing safety tools. The helmet test is used for testing helmets. Both sensors can be used individually or simultaneously. It can meet the requirements and work requirements of different use site environments, and has stable performance and accurate test results.

Fourth, tensile testing machine test methods

1, impact performance test

(1) Connect the helmet test sensor and the helmet tester sensor interface

(2) Turn on the power before the test. When the screen displays "Pinsheng Electric welcomes you!" screen, press the test key one after another and use the direction key (↑) to move the cursor to the "hard hat". Press the confirmation key, there appears "1 helmet impact method" "2 # helmet puncture" words, this time the electromagnet is energized to produce magnetic force, the plane of the hammer is aligned below the electromagnet, so that the electromagnet and the center of the hammer are attracted. Use arrow keys (↑) (↓) to move the cursor and then press enter to enter the corresponding test state. “Drop and Drip” sounds can be used to drop the hammer test. (Hammer impact must be completed within 5 seconds after the sound is heard). The impact data is displayed after a few seconds. If the impact force is less than 4.900 kN, the test passes. If you want to print, press Print to print out the test report. Reset to exit. When you do the next helmet, press Test Health to repeat the above steps.

2, puncture resistance test

An intact safety helmet is placed on the head mold, and an electrode of the electric contact device is placed between the safety helmet and the head mold. The electrode is made of aluminum sheet, and a steel cone contacts the electrode to form a closed circuit. Before turning on the power supply before the test, when the screen displays "Pinsheng Electric welcomes you!" screen, use the steel cone to drop from the height of 1m within 100mm of the top center of the puncture helmet. Press the test key one after another and use the arrow keys ( ↑) (↓) After moving the cursor to the “Hard Hat” and pressing the Enter key, “1# Helmet Impact” and “2# Helmet Piercing” appear. At this time, the electromagnet is energized to generate magnetic force, and the plane of the puncture hammer is aligned with the electromagnetic Underneath the iron, the electromagnet is attracted to the center of the puncture hammer. Use arrow keys (↑) (↓) to move the cursor and then press enter to enter the corresponding test state. “Drop and Drip” sounds can be used to drop the hammer test. (Hammer impact must be completed within 5 seconds after the sound is heard). After a few seconds, the puncture is displayed. If no puncture is performed, the test is passed. The puncture is automatically saved and the report is printed. Reset to exit. When you do the next helmet, press Test Health to repeat the above steps.

V. Use and Inspection of Safety Tools

1. The appearance inspection of safety tools before use shall include the presence or absence of cracks in the insulation part, aging, loss of the insulation layer, serious flaws, and the presence or absence of loosening, corrosion, and fracture of the fixed connection parts. If the appearance of the insulation part is doubtful, it shall be used only after passing the insulation test.

2. Insulating operating rods, electroscopes and measuring rods: The allowable operating voltage should correspond to the equipment voltage rating. When in use, the operator must not cross the boundaries of the guard ring or the hand-held part. In rainy days, the city of electrical equipment is operated outdoors. The insulated part of the operating rod should have a rain cover or an operating rod with an insulator. When using, the human body should maintain a safe distance from the live equipment and pay attention 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 clamp at both ends of the grounding wire should ensure that the grounding wire and the conductor and the grounding device can contact well, easy disassembly, have sufficient mechanical strength, and will not loose in the passage of large short-circuit current. Before using the grounding cable, check whether it is in good condition. If loose strands, broken strands, severe damage to the jacket, loose jigs, etc. are found, do not use them.

4. Insulating baffles and insulating covers: Insulating baffles and insulating covers are only allowed to be used on electrical equipment with a voltage of 35 kV and below, and should have sufficient insulation and mechanical strength. For 10kV voltage level, the thickness of the insulating spacer should not be less than 3mm, for 35kV voltage level should not be less than 4mm. When the site is electrically charged with insulating partitions and insulating covers, insulation gloves should be worn and insulated operating rods should be used. If necessary, insulation ropes can be used to fix them.

5, helmets: helmets before use, should check the shell, cap liner, cap hoop, top lining, chin strap and other accessories intact. When used, the chin strap should be fastened to prevent it from falling backwards during work or other reasons.

6, seat belts: belts and belts, ropes should have sufficient mechanical strength, material should have wear resistance, snap ring (hook) should have insurance devices, the operation should be flexible. The length of the belts and ropes is 3m or more.

7, foot buckle and climbing board: deformation of the metal part and rope (band) injured prohibited. Special anti-skid measures should be taken for the use of foot clasps and climbing boards in special weather conditions.