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Structural Characteristics |
| Shape |
It is usually in an annular structure. Depending on different designs and application scenarios, there may be some differences in details. However, as a whole, it is installed around a specific position of the mixing drum, playing the roles of support and connection. |
| Material |
Generally, high-strength metallic materials are used, such as high-quality carbon steel or alloy steel, etc. These materials have good strength and toughness, and are able to withstand various forces generated during the operation of the mixer truck, including the weight of the mixing drum, the impact force of the materials, and the vibrations during the vehicle's driving, etc. |
| Dimension Specifications |
Its size depends on the model of the mixer truck and the size of the mixing drum. The common diameters may range from dozens of centimeters to more than one meter, and there are also various specifications for the width to meet different load-bearing and supporting requirements. |
Simply put, it is an annular track that provides a rolling support surface for rolling elements (such as balls and rollers). In a rolling bearing, it usually consists of an inner - ring raceway and an outer - ring raceway. The inner - ring raceway fits tightly on the shaft, while the outer - ring raceway is installed on the bearing housing or other stationary components. Its cross - sectional shapes are diverse, commonly including circles, ellipses, rectangles, etc. Different shapes of raceways are suitable for different working scenarios and load - bearing requirements. For example, a circular raceway distributes radial loads more evenly, while a rectangular raceway has an advantage in withstanding large axial loads.
Our company mainly provides raceways for concrete mixers. The materials are Q345B and Q355B, and the HB (Brinell hardness) requirement is not less than 150. First, forging or rolling is carried out to process the raw materials into roughly annular blanks. This process can optimize the internal structure of the material and improve its comprehensive performance. Then, machining is performed. High - precision CNC lathes, grinding machines and other equipment are used to precisely process the size and shape of the raceway, ensuring that its accuracy indicators such as roundness and cylindricity reach extremely high standards, so as to ensure that the rolling elements can roll smoothly in the raceway. For high - precision raceways, subsequent processing such as ultra - precision grinding and polishing may also be required to further reduce the surface roughness and rolling friction.
- Machining: The full name is mechanical processing. It refers to the process of processing workpieces through various mechanical equipment to meet the predetermined requirements in terms of shape, size, accuracy and surface quality. It is one of the core links in modern manufacturing. Using a lathe, the workpiece rotates while the cutting tool makes a linear feed motion, which is mainly used for processing the surfaces of rotational parts, such as the outer circles, inner holes, conical surfaces, and threads of shaft - type and disc - type parts. Turning has relatively high processing accuracy, reaching IT6 - IT8 levels, and the surface roughness Ra can reach 0.8 - 1.6μm. It is commonly used for both rough and fine machining of mechanical parts.
When using a drilling machine, the cutting tool rotates and makes an axial feed for hole processing, such as drilling, reaming, and counterboring. Drilling is the most basic operation, which can directly drill holes of a certain diameter, but the accuracy is relatively low. Reaming is to enlarge an existing hole to improve its dimensional accuracy. Counterboring can further improve the hole accuracy to IT7 - IT9 levels, with a surface roughness Ra of 0.8 - 1.6μm, and it is commonly used for hole processing of mechanical parts.
There are a wide variety of main equipment for machining, such as lathes, milling machines, drilling machines, grinding machines, boring machines, planers, etc. Different machine tools have their specific functions and application scopes. To meet complex processing requirements, modern manufacturing often uses machining centers, which integrate multiple processing functions and can automatically change tools to achieve continuous and efficient processing of workpieces.
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