What is the material and function of the brake shoes?
TIME：2020.01.05
Brake shoe material and drilling function: The material of Brake Shoe is malleable iron, the material of Rear Brake Shoe is ductile iron QT400-15, and the wear part of brake shoe is hardened by high frequency, the technical requirement is quenching hardness is not less than 48HRC 485HV, but the high-frequency quenching hardness of brake shoe flat surface is far from the technical requirement. Therefore, it is proposed to use laser surface melting treatment instead of high frequency quenching to solve this problem. Laser surface remelting, also known as laser surface remelting, is the material surface with laser heating to melt, and then cooling itself to obtain quenching structure. The brake shoe material is cast-milling, so remelting results in a harder ledeburite structure and finer grains on the quenched surface. So what's The punch for? The function of the holes is to assist in heat dissipation, that is, after the car runs, whether the air duct is straight or hollow, it needs to dissipate heat to a certain degree of friction, stronger heat dissipation to who, AH, actually dissipates heat to the whole brake system, letting the temperature of your calipers, oil, and brake pads be a little lower, the brake disc does not fear heat, the melting point of more than 1,000 degrees, so it is not very afraid of heat. The heat dissipation of the disc body has no particularly great influence on this process, but it will greatly affect the overall heat dissipation of your brake pads, so the air duct that is punched out is to dissipate heat for the entire disc of the calipers. The auxiliary wind that is punched out these holes is to let the brake pads cool faster. Therefore, the purpose of drilling this thing is to dissipate heat, while drilling is to reduce the intensity of drilling, and the intensity of drilling is necessarily to reduce the need to replenish precious metals, which is a key issue. So on Taobao, on JD.com, whatever channel it is, don't buy those cheap perforated discs, you don't have to, first of all, you don't need that much heat dissipation, because the perforated discs were used in the early days of the game, because it was a continuous, repeated application of the brakes, and even in many places the frequency of the brakes is too high, so it needs that heat dissipation. But we don't need them at all. It's enough for our applications to buy one of these underlined brake discs. Not to punch holes will degrade performance, or to buy one of these high performance discs a few times or even a dozen times. But first you need those brakes. You need good tires. You have good brakes. You have good heat dissipation. You need a fake or retread or a cheap one. You don't need a really good, half-hot-melt tire. It doesn't make sense. The forming of 250 oil brake shoes is divided into two parts. Firstly, the blank is formed into concentric parts with the required shape and size, and then the concentric parts are formed into eccentric parts by using the change of roller profile. The two stages must be completed within one week of roll rotation in Cross Wedge Rolling Mill, otherwise it will lose its significance. The oil brake shoe is one of the key safety parts in the automobile brake system, which is mounted on the brake drum and is pushed outward by the action of Brake Cam or push rod. The shape of the brake shoes is like a half-moon. When you step on the brake shoes, the two half-moon shaped brake shoes will stretch out under the action of the brake cylinder. The brake shoes will rub against the inner wall of the brake drum to slow down or stop the car. 220 Oil Brake shoe block to do a good job of three inspection, self-inspection, mutual inspection, exclusive inspection, can not have unqualified products poured into the next process, found in the next process of unqualified products in a timely manner to inform operators to deal with.
