First how do professionals evaluate automotive brake pads?
Friction material professionals usually evaluate the quality of the brake liner from the following aspects: braking performance, high and low temperature friction coefficient, high and low speed friction coefficient, service life, noise, brake comfort, no damage to the disc, expansion and compression performance.
Second, one of the methods for automobile brake pad manufacturers to judge inferior brake pads
When you buy disc brake pads in the market, check that the chamfer of the brake pads is the same on both sides, that the grooves in the middle are flat, and that the edges are smooth and free of burrs. Because of these details of the product, although it does not affect the braking performance of the production part, it can reflect the manufacturing level of the manufacturer’s equipment. Without good manufacturing equipment, it is difficult to produce high-quality products even with good formulations.
Third, the second method of judging the brake skin
For disc brake pads, check whether the friction material part of the brake pad and the backplane is flying, that is, whether there is friction material on the backplane. This shows two problems. First of all, there is a gap between the back plate and the mold that are not properly installed during the hot pressing process; Second, there are problems with the hot pressing process. The time and frequency of exhaust is not suitable for the product forming process. The possible problem is the poor internal quality of the product.
Fourth, the third method of judging inferior brake pads
For heavy truck drum brake pads, check whether the large and small holes of the brake pads are smooth. There should be no tingling sensation when the finger is rotated inward. If possible, the inner arc surface can be lifted up with a little force, if the brake can spring up without breaking, then this is one of the better brake brands, inferior brake may break.
Fifth, the fourth method of judging inferior brake pads
For heavy truck drum brake pads, there is also a difference between high quality and low quality brake pads during riveting. There is a gap between the inner arc of the lower brake liner and the brake shoe. Riveting will occur during the riveting process, and riveting may also occur.
The fifth way to judge the brake pads of cars
For the brake shoe, it mainly depends on whether there is glue overflow and liner offset at the junction of the lining and the iron shoe. These problems indicate that there are problems in the production process during the processing of the lining and iron shoes, although this does not affect the performance of the brake. This will have a big impact, but reflects poor quality control by the manufacturer in the production process, so its inherent quality must be questioned.
Seven. The sixth method of judging inferior brake pads
Regardless of disc brake pads, heavy truck drum brake pads, shoe brake pads, internal quality inspection can use two similar product friction materials for surface contact, and then force the relative friction, if there is a falling phenomenon of powder or dust, indicating that the brake pad is not a good product, indicating that the internal friction material of the product is relatively loose, It directly affects the thermal degradation and wear resistance of the product.
Post time: Sep-11-2024