In modern society, electrical devices are everywhere. From small home appliances in daily life to large machinery in industrial production, they all rely on power cords for connection. The power cord, as a link between electrical devices and the power source, has its quality and reliability directly related to the normal operation of the devices and the safety of users. To ensure that power cords can withstand the pulling and twisting forces in various usage environments, the power cord tensile and torsion testing machine has emerged.

1. Working Principle

The power cord tensile and torsion testing machine conducts strict tests on power cords by simulating the pulling and twisting forces that power cords may encounter in actual use. It uses a motor to drive the eccentric wheel to rotate, driving the sample to pull the weight to achieve a pulling force of 1s each time; the electromagnet release method is used to use the weight to generate a load on the sample. At the same time, the force direction and the sample axis form a torque arm through the torque wheel to achieve torque testing. The tension weight and torsion weight can be switched to meet different requirements in the standard.

2. Structure

The equipment is designed with a motor cam push rod mechanism. Moreover, it combines a tension fixture and a torque fixture. In the middle, there is a bearing installed to effectively reduce friction during the torque testing process. Additionally, its Z - shaped structure allows the fixture to firmly clamp the sample. Specifically, it can hold the power cord with a length above 150mm on the bottom surface. This equipment is mainly utilized to test the firmness of the clamping terminals of large household appliances like refrigerators and washing machines.

During the pulling force test, first of all, the pulling force loading system will apply a pulling force to the power cord at a set rate. It will continue this action until the specified pulling force value is reached or unfortunately, the power cord gets damaged. On the other hand, in the torsion test, the torsion loading system will make the power cord undergo a certain angle of torsion. This is done to accurately detect its performance under torsion.

3. Application Scenarios

Home Appliance Industry

For various home appliances like televisions, refrigerators, and washing machines, the quality of power cords is of great importance. Home appliance manufacturers use the power cord tensile and torsion testing machine to randomly inspect the purchased power cords during the product production process. This ensures that each power cord can meet the product's usage requirements and avoids product failures and safety hazards caused by power cord problems.

Electronic Device Manufacturing Industry

The power cords of electronic devices such as mobile phone chargers and laptop power adapters also need to be strictly tested. With the miniaturization and portability of electronic devices, higher requirements are placed on the flexibility and durability of power cords. The power cord tensile and torsion testing machine can effectively detect the performance of power cords in complex usage scenarios.

Industrial Equipment Field

The power cords of large machinery used in industrial production often need to bear significant pulling and twisting forces. By testing the power cords of industrial equipment with the power cord tensile and torsion testing machine, the stable operation of the equipment in harsh working environments can be guaranteed, and production interruptions caused by power cord failures can be reduced.

4. Maintenance

1. Check whether the fasteners are loose before work and lock the loose ones.

2. The steel wire rope will be damaged after many tests, and please prepare more ropes and replaced in time.

3. Remove the weight in non-working state.

4. Cut off the power when not working.

In conclusion, the power cord tensile and torsion testing machine plays an indispensable role in ensuring the safe operation of electrical devices. As the electrical industry continues to develop, the requirements for the quality of power cords will become higher and higher. The power cord tensile and torsion testing machine will also continue to be upgraded and innovated to provide more reliable technical support for electrical safety.