As the core component of the vehicle braking system, the performance of automobile brake pads directly affects driving safety. To ensure the quality and reliability of brake pads, a strict inspection process is essential. This article will introduce the inspection process of automobile brake pads in detail to help industry practitioners and consumers understand the technical standards behind it.
Appearance inspection
The appearance inspection of brake pads is the first step, mainly checking whether there are problems such as cracks, deformation, metal inlays or excessive wear. The surface of a qualified brake pad should be flat and free of obvious physical damage. In addition, the uniformity of the friction material is also a key indicator. Any uneven wear or impurities may affect the braking effect.
Dimension measurement
The dimensions of the brake pad must meet the manufacturer's standards, including thickness, length, width, and chamfer angle. Use high-precision calipers or three-dimensional measuring equipment for inspection to ensure the matching degree of the brake pad with the brake caliper. Excessive dimensional deviation will lead to installation difficulties or reduced braking performance.
Hardness test
The hardness of the friction material of the brake pad directly affects its wear resistance and braking effect. Usually a Rockwell hardness tester or a Shore hardness tester is used for testing to ensure that the hardness is within the specified range. Too hard may cause brake noise, while too soft may accelerate wear and affect service life.
Friction performance test
Friction performance is the core indicator of brake pads, which is usually tested through bench tests. Simulate the real braking environment and measure the friction coefficient of brake pads at different temperatures, pressures and speeds. Qualified brake pads should maintain stable friction performance, avoid thermal decay, and ensure braking reliability at high temperatures.
Durability test
The durability test evaluates the wear rate and performance decay of brake pads through long-term high-intensity braking simulation. The test usually includes continuous braking cycles to observe the degree of wear of the friction material and whether cracks or detachment occur. Brake pads with unqualified durability may fail in a short time and pose safety hazards.
Noise and vibration detection
The noise and vibration problems of brake pads directly affect the driving experience. By simulating braking conditions, detect whether the brake pads will produce abnormal noise or vibration. Qualified brake pads should have good NVH (noise, vibration and roughness) performance to ensure a quiet and smooth braking experience.
Strict testing procedures are the key to ensuring the quality of brake pads. From appearance to performance, every link must meet industry standards to ensure the safety and reliability of the final product. Understanding these testing processes can help industry practitioners improve product quality and provide consumers with a more secure choice.
