Common Equipment Used in Bearing Ring Casting (Part 1)

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In the casting process of bearing rings, several types of equipment are commonly used, including air hammers, crank presses, rolling machines, and casting furnaces. These tools play a crucial role in shaping and forming the metal into the desired bearing ring structure. 1. **Air Hammer** An air hammer is a mechanical device that consists of a piston, hammer, anvil, motor, pulley, crankshaft, and other components. The rotation of the crankshaft compresses or expands air within the cylinder, which then controls the movement of the hammer via a valve system. This motion allows the hammer to strike the workpiece, making it suitable for small-batch production of larger bearing rings. However, it tends to be noisy during operation and is often used for free forging or hammer forging. 2. **Crank Press** A crank press is primarily composed of a working mechanism (crank, connecting rod, and slide), a transmission system (motor, pulley, drive shaft), and a frame. It is ideal for stamping sheet metal parts and die forging of bearing rings, especially in mass production settings. Its controlled motion makes it more efficient and precise compared to manual methods. 3. **Rolling Machine** The rolling machine includes components such as pressing wheels, cylinders, and rollers. During operation, the ring blank is placed on the roller, and the rotating wheel applies pressure to deform the ring. As the ring rotates, its thickness decreases, and the diameter increases. This method is widely used in the manufacturing of large-diameter bearing rings due to its efficiency and uniformity. 4. **Casting Furnace** Heating is a critical step in the casting process, directly affecting the quality, material utilization, energy consumption, and environmental impact of the final product. The type of furnace used depends on the fuel—common options include coal-fired, oil-fired, gas-fired, and electric furnaces. In China, coal-fired furnaces still dominate, accounting for about half of the total output, while electric furnaces are less common, making up less than 10% of the market.

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