Analysis of common failures of film impact testing machine and its solutions
Common failure analysis of film impact tester and its solution The film impact tester is used to test the impact toughness of metal and non-metal materials. The test machine is absorbed according to the test material after being hit by a certain weight. Energy, to determine the toughness of the material. Bathroom Sink Faucet,Bathroom Water Filter,Bathroom Water Tap,Brass Kitchen Faucet kaiping aida sanitary ware technology co.,ltd , https://www.aidafaucet.com
The film impact testing machine is mainly used for impact testing of products, so the impact force will be very large, and it will have a certain impact on the life of the machine. In the course of use, the roughness meter is important to detect the malfunction of the mixer. The performance of various aspects, the following analysis of the frequent occurrence of the film impact tester.
Common fault one: The dial pointer has poor sensitivity, and there is a stop phenomenon after unloading, or the zero position often changes. There are many reasons for this phenomenon. 1. The pulley on the rack and its track are too dusty and rusted. At this point you need to remove the cleaning, plus a little watch oil. 2. The pointer rotates the shaft dirty and should be cleaned. 3. There is contact between the racker and the rack and should be loosened. 4. The buffer return oil is not good and should be adjusted or cleaned. 5. The belt on the force measuring piston is loose or too loose (so that the piston cannot run at a constant speed). 6. The force of the piston in the cylinder is increased or the machine is stuck in the cylinder. The chrome oxide paste is applied to the grinding until normal. 7. The pendulum has obstructions during the lifting process, or the pendulum shaft is too dirty or rusted, causing the pointer to change back to zero.
Common fault 2: When doing the tensile test, the sample fracture is always broken on both sides. The reason for this phenomenon should first be considered whether the main part of the test machine is installed vertically. If this reason is excluded, it will be excluded from the following three aspects. 1. When the jaws are not clamped, the specimens should be clamped symmetrically as required. 2. The quality of the jaws is inferior and the teeth are damaged. In addition to affecting the different cores of the jaws, the samples are slipped during the test, making the yield point centrifuge difficult to identify. The jaws should be replaced at this time. 3. The adjustment of the lifting guide wheel is not correct, so that the upper and lower jaws are not concentric. A test rod shall be machined, and the upper and lower jaws shall be tensioned and measured with a dial gauge based on the two force columns until the adjustment is passed.
Common fault 3: The position of the pendulum is not normal, and the pendulum is not allowed to be vertically marked. The main reason is that the viscosity of the oil is too large or the oil is too dirty. Remedy: Replace the oil with the right viscosity. The force-measuring piston rotates with a large amount of friction or does not rotate. Remedy: Check the film impact tester for level and eliminate the force measurement piston failure. There is unstable friction. Remedy: Clean the pendulum shaft bearing, the toothed rod, the pointer, the wire wheel, adjust the level of the testing machine, and reduce the unstable friction.
Common fault four: the hammer is not normal, and it is fast and slow. Normally, the buffer can be rotated to the proper position. However, if the oil hole of the damper is clogged, or if the steel ball of the buffer valve and the inlet contact portion are excessively smeared or the gap is too large, the damper may be disabled. The solution is to clean the buffer valve and adjust the gap between the steel ball and the valve seat to be about 0.5mm. Place the oil needle knob to reduce the gap between the needle and the valve body and re-list the ABCç £ mark. Also, when the temperature influence is large, the oil can be appropriately replaced.
Common fault 5: The passive needle does not stop well at any position and does not coincide with the main needle. The method of removal is to remove the dial glass, adjust the passive needle compression spring screw, and adjust the pointer to coincide with the main needle.
Common fault 6: When loading, the oil system system is seriously oily or the tubing is broken. First, check if the joints of the oil system are tightened. If it is necessary to replace the gasket, replace it in time. If the tubing is broken, it is necessary to replace the tubing with higher strength. In addition, observe the oil delivery valve and whether the relief valve piston is dead or reversed.
Common fault seven: After the specimen breaks, the pendulum quickly falls back, causing impact. The main reason is that the buffer is out of order. In addition to the conventional adjustment, it should also be considered whether the oil is too thin or too dirty. In short, always pay attention to the problems found in the testing machine during use, and eliminate them in time to avoid errors in your test results. In the test machine is regularly checked and corrected to ensure the normal use of the test machine.
For information on the film impact tester, please refer to it: http://
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