In the realm of product safety and quality assurance, the IEC60068-2-75 standard plays a crucial role. This standard is specifically designed to evaluate the ability of a specimen to endure specified levels of impact. It offers three well - standardized and coordinated test methods, mainly targeting the testing of electrotechnical items.

First and foremost, let's explore the purpose of these hammer impact tests. The fundamental aim is to replicate the accidental impacts that products might encounter during real - world usage. For example, a product could accidentally drop or be struck by external objects. By conducting these tests, we can assess the structural integrity of the product. Does the product's structure remain intact after the impact? We can also check the stability of its internal components. Are they loose or damaged? Moreover, it helps us determine whether the product can still function normally post - impact. This is of utmost importance as it ensures that the product has adequate resistance to physical impacts, thus guaranteeing its safety once it reaches the market.

Now, let's move on to the test methods. The IEC60068-2-75 standard provides three distinct test methods. Each method has its own set of specific regulations regarding impact energy, impact direction, and the number of impacts. These regulations are vital as they ensure the accuracy and comparability of the test results across different products and testing facilities.

There are several key test parameters that we need to be aware of. Regarding impact energy, the weight of the hammer and its free - fall height are standardized. The impact energy can range from 0.14 joules (J) to 50 joules (J). Different types of products and their application scenarios demand different levels of impact energy. For instance, small electronic devices usually only need to withstand low - energy impacts. On the other hand, large industrial equipment must be able to handle high - energy impacts to ensure their reliability and safety during operation.

When it comes to fixing the test sample, it is essential to firmly secure it on the bracket. Any displacement of the sample during the test should be strictly avoided. Why is this so important? Well, this ensures that the impact point and the impact effect remain consistent for each test. Only in this way can we obtain accurate and reliable test results.

The impact direction is another crucial parameter. To comprehensively evaluate a product's impact resistance, the test is typically carried out in multiple directions. This includes horizontal, vertical, and diagonal directions. The reason behind this is that in actual use, the direction of impact on a product is unpredictable. By testing in multiple directions, we can simulate the real - life situation more realistically.

The test process can be divided into three main stages. In the preparation stage, we must ensure that the test sample is in perfect condition, without any damage or defects that could potentially affect the test results. Additionally, we need to carefully check and calibrate the test equipment. This guarantees that the equipment can generate the specified impact energy accurately and fix the test sample as per the standard requirements.

Next is the execution stage. Here, we need to apply the specified number of impacts, with the correct energy and in the right direction, strictly following the selected test method. During this process, it is essential to accurately record relevant data for each impact, such as the impact time and impact energy. This data will be valuable for the subsequent evaluation.

Finally, in the evaluation stage, after the impact test is completed, a comprehensive performance evaluation of the product is conducted. This involves electrical performance testing to check for short circuits, open circuits in the product's circuit, and damage to electronic components. We also perform a mechanical strength inspection to see if the product's structure is deformed or cracked and whether the components are loose. Moreover, an appearance damage inspection is carried out to record any scratches, dents, or other surface damages. Based on the results of these various evaluations, we can determine whether the product passes the test.

To meet the requirements of the IEC60068 - 2 - 75 standard, Pego offers a range of corresponding testing equipment.

In conclusion, the IEC60068 - 2 - 75 hammer tests are an essential part of product safety evaluation. By understanding these tests thoroughly and using the appropriate testing equipment, manufacturers can ensure the quality and safety of their electrotechnical products.