High friction composite brake shoe for railway freight car and manufacture method thereof

Abstract

The invention discloses a high friction composite brake shoe for a railway wagon and a manufacturing method thereof. The composite brake shoe comprises: a steel back and a brake shoe body which is fixed on the steel back, wherein, the brake shoe body is prepared by materials which are synthesized by various components with the following weight ratio: 8 to13 parts of nitrile butadiene rubber, 2 to10 parts of styrene butasiene rubber, 5 to10 parts of cresol modified A-stage phenolic resin, 15 to 30 parts of steel fiber, 10 to 15 parts of magnesium oxide, 5 to 10 parts of calcined petroleum coke, 2 to 5 parts of silicon carbide, 10 to25 parts of mineral fiber, 5 to 10 parts of calcium hydride, 10 to 20 parts of barium sulfate, 5 to 10 parts of graphite, 1 to 5 parts of molybdenum disulfide, 1 to 5 parts of carbon black, 1 to 3 parts of sulfur and 1 to 3 parts of enhancer. The brake shoe can be used in the railway heavy-duty high-speed wagon and has stable friction performance and better wear resistance; the brake shoe can effectively inhibit the phenomena of metal inlay, cracks, dropping blocks and the like and reduce the damages on wheels; and the brake shoe is characterized by better impact resistance performance and good weatherability.

Description

Technical field [0001] The invention relates to the manufacturing field of railway vehicle components, in particular to a high-friction synthetic brake shoe for railway freight cars and a manufacturing method thereof. Background technique [0002] The brake shoes of railway freight cars currently in use are mostly manufactured by using resin as the bonding system and hot press molding. The brake shoes made of this technology and materials are manufactured under the conditions of a vehicle weight of 80T and a speed of 80 kilometers per hour. The performance can basically meet the braking requirements. However, the inventor found that if the railway freight car is under heavy load and high-speed driving, such as the railway freight car with a weight of more than 80 tons and a speed of more than 80 kilometers per hour, the friction force is required to be greater when braking, which will affect the brake shoes. The temperature resistance of the brake shoes has high requirements. The...

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Problems solved by technology

But the contriver finds, if railway wagon is under the situation of heavy load, high-speed running, as the weight of railway wagon is higher than 80 tons, under the condition of speed greater than 80 kilometers per hour, when braking, require frictional force bigger, to brake shoe The temperature resistance of the brake shoe has high requirements. The brake shoe manufactured by the existing resin-based bonding system and hot-pressed production process has insufficient friction performance, and the friction body is easy to break and fall off, and the metal inlay is serious, which is easy to cause Wheel scratches, thermal damage, cracks, endangering driving safety, and short service life, cannot meet the braking requirements of existing heavy-duty, high-speed railway trucks

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