Application Research of LISUN IK Impact Rating in Equipment Mechanical Strength Testing

Abstract: In the production and quality inspection of lighting products, power equipment, and outdoor application equipment, the mechanical impact strength of the shell is a core indicator that determines the safety, reliability, and service life of the products. This paper takes the LISUN IK07-10 IK Impact Rating as the research object, systematically expounds its technical principles, structural characteristics, and applicable scenarios, and focuses on analyzing the specific application processes of this equipment in the IK strength testing of lamp housings, the impact testing of metal sheets of power distribution cabinets, and the verification of impact resistance of outdoor equipment. By comparing the parameter settings and test results of different test objects, the testing accuracy and stability of the equipment within the energy range of 2J-50J are verified, providing a scientific basis and practical reference for product quality control in related industries.

1. Introduction
With the rapid development of the lighting engineering, power system, and outdoor equipment industries, the products are facing increasingly complex service environments, and the risks of mechanical impacts such as collision and drop have increased significantly. As the first protective barrier of the equipment, the impact resistance of the shell directly affects the safety of the internal components of the equipment and the overall operation stability. In international standards, the IK code (mechanical strength protection level) has become the core basis for evaluating the impact resistance of equipment shells. Among them, the IK07-10 level corresponds to the impact energy range of 2J-50J, covering the protection needs of most civil and industrial equipment.

As a professional manufacturer of testing equipment, LISUN has developed the IK07-10 IK Impact Rating, which is widely used in the impact strength testing of products such as lighting fixtures, power distribution cabinets, and non-metallic electrical energy cabinets, relying on its adjustable mounting bracket, flexible impact angle, and precise energy control. This paper comprehensively explores the application value of this equipment in actual testing by analyzing the technical parameters of the equipment, building test scenarios, and analyzing test data, providing a standardized process reference for similar tests in the industry.

2. Technical Characteristics of LISUN IK07-10 IK Impact Rating
2.1 Core Principle of the Equipment
The LISUN IK07-10 IK Impact Rating is based on the principle of “conversion of gravitational potential energy into impact kinetic energy”. It accurately controls the energy output (2J-50J) at the moment of impact by adjusting the mass and lifting angle of the pendulum. During the test, the pendulum rotates around a fixed axis to a preset angle, and after being released, it falls freely along a circular arc path to apply an impact load to the sample fixed on the bracket. The equipment is equipped with a built-in energy calibration system, which can real-time correct the energy loss caused by mechanical friction, ensuring that the test error is ≤±2%, and meets the requirements of international standards such as GB/T 2423.55-2006 and IEC 62262:2002.

IK Level Tester IK07-10

2.2 Key Structure and Parameters
The core advantages of the LISUN IK07-10 IK Impact Rating lie in its modular design and flexible adjustability. Its key structures and technical parameters are shown in the following table:

3. Application Practice of LISUN IK07-10 in Different Product Tests
3.1 IK Strength Testing of Lamp Housing
As a product with high daily usage frequency and high vulnerability to collision, the IK level of the lamp housing must comply with the standard “GB 7000.1-2015 Luminaires – Part 1: General Requirements and Tests”. Taking the housing of a certain brand of LED ceiling lamp (material: ABS engineering plastic, thickness: 3mm) as an example, the LISUN IK07-10 is used for the IK08 (5J) level test, and the specific process is as follows:

• Sample Fixing: Fix the lamp housing on the mounting bracket, adjust the bracket height so that the center of the sample is aligned with the impact point of the pendulum, and set the impact angle to 0° (front impact);
• Parameter Setting: Select the impact energy of 5J, which corresponds to a pendulum mass of 1kg and a lifting angle of 63°, and the system automatically calibrates the energy value;
• Impact Test: Start the equipment, the pendulum falls freely to impact the central area of the sample. After the impact, observe whether the housing has cracks, damage, or functional failure (such as buckle falling off, light-transmitting cover cracking);
• Data Recording: The equipment automatically records the impact time (about 0.02s), maximum impact force (about 500N), and sample deformation (≤1mm is qualified).

The test results show that the LED ceiling lamp housing has no obvious damage under the 5J impact, only slight depression on the surface, which meets the requirements of the IK08 level. If a higher level (such as IK10) needs to be tested, a 5kg pendulum can be replaced, and the lifting angle can be adjusted to 85° to achieve 50J energy impact, so as to verify the protection ability of the housing under severe impact.

3.2 Impact Test of Metal Sheets of Power Distribution Cabinets
As the core equipment of the power system, the metal sheets of its housing (mostly made of cold-rolled steel plates, thickness: 1.5mm-2mm) must withstand accidental impacts during transportation and installation. The LISUN IK07-10 is used to conduct the IK09 (10J) test on the side plate of a certain type of power distribution cabinet. The test plan and results are shown in the following table:

3.3 Mechanical Impact Strength Test of Outdoor Equipment
Outdoor equipment (such as outdoor charging piles, communication base station housings) must cope with both impact and environmental corrosion, and their housings are mostly made of glass fiber reinforced plastic or aluminum alloy. Taking the housing of a certain outdoor charging pile (glass fiber reinforced plastic material, thickness: 5mm) as an example, the LISUN IK07-10 is used for the IK10 (50J) limit test, focusing on verifying the protection ability of the housing for internal circuits under extreme impact:
• Pretreatment: Place the sample in an environment of (23±2)℃ and let it stand for 24h to eliminate temperature stress;
• Impact Position: Select the area of the housing close to the internal circuit board (10mm away from the circuit board), and set the impact angle to 45°;
• Energy Setting: Use a 5kg pendulum, lift the angle to 85°, and output 50J impact energy;
• Result Verification: After the impact, disassemble the housing, observe whether the internal circuit board is short-circuited and whether the components fall off, and at the same time test the sealing performance of the housing (verified by the IPX5 waterproof test).

The test results show that the charging pile housing has local depression (depth: 8mm) under the 50J impact, but the housing is not penetrated, the internal circuit board is not damaged, and the waterproof performance does not decrease, which meets the IK10 level protection requirements of outdoor equipment.