Strength and reliability test of iron padlock
In daily life, we can't do without all kinds of locks to protect our property. Among them, iron padlocks are widely used in families, schools and enterprises because of their durability and convenient use. However, when purchasing iron padlocks, consumers often only pay attention to its appearance design and ignore the most important factors-strength and reliability. So how to ensure the quality of iron padlocks? This requires a series of professional tests on iron padlocks.
1. Material inspection: The main material of iron padlock is steel or alloy. First of all, raw materials should be analyzed to ensure that they meet the national standards; Secondly, it is necessary to measure the hardness of the metal by a hardness tester to evaluate the compression resistance and wear resistance of the material.
2. Tensile test: This step mainly tests the maximum bearing capacity of the iron padlock and whether it can withstand the pressure of long-term heavy hanging. The specific method is to fix the sample on a special equipment, and gradually increase the tensile force until it is destroyed, and record the maximum value before the destruction, which is the tensile force. According to GB/T 69482008, the minimum breaking load of iron padlock should be greater than or equal to 300kgf.
3. Structural stability inspection of lock body: including observing whether there are obvious defects (such as cracks and holes) on the surface of lock shell; Measure the dimensional accuracy of each component with vernier caliper; Simulate the user's operation process and manually turn it on and off several times to ensure smooth action and no jamming.
4. Determination of corrosion resistance: Because the outdoor environment is complex and changeable, it is necessary to investigate whether the iron padlock can effectively resist the influence of acid rain and salt spray corrosion under natural conditions. According to GB/T 10125—2012, the continuous spraying experiment can be carried out for more than 72 hours, and finally, whether there are signs of rust is visible.
5. Verification of password opening and closing function: For products with password setting function, you need to pay extra attention to the following points:
A. Look at the change of indicator light after inputting the digital combination, and confirm that the signal feedback is accurate;
B, try to force the password to be opened when the password is forgotten, so as to ensure that the purpose of opening can only be achieved through the correct unlocking instruction;
C. Change the setting content for many times to verify the stability and memory effect of the system.
Through the comprehensive consideration of the above five aspects, we can get a comprehensive and scientific quality evaluation system. Of course, there will be more details to be paid attention to and improved in the actual production process, such as the improvement of production technology and the application of new materials. In short, only by constantly striving to improve their own technical level can we better meet the market demand and win the trust and support of consumers!
Rec. Prods.
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