1. Feed machinery and equipment accessories spindle and press plate product introduction

In the feed machinery and equipment, the spindle connecting plate is a very critical component, which bears the core power transmission and pressure application functions in many important processes such as granulation and crushing. Its performance directly affects the quality of feed products, production efficiency and the overall stability and reliability of equipment.

2. Structure composition

Main shaft section

The spindle is usually a slender cylindrical bar, which is the core support and power transmission part of the entire spindle and press plate assembly. Its diameter and length depend on the specific model, power and working load of feed machinery and equipment. In general, the spindle diameter of the large feed granulator or crusher is large to ensure that it can withstand the huge torque and axial force, and the length needs to meet the layout requirements between the various working parts of the equipment to ensure that the power can be accurately transmitted to the corresponding part. The two ends of the spindle are usually designed with a connected structure, and one end is connected with the power source (such as the motor, the reducer), and the key connection, spline connection or coupling connection are used to achieve efficient torque transmission; The other end is connected with the pressure plate or other working parts, and also has a specific connection interface, such as threaded connection, flange connection, etc., to ensure that the pressure plate can be stably rotated or reciprocated during the working process. In the shaft part of the spindle, there may be some special structural design, such as the shaft journal processed for mounting bearings, and the surface accuracy and roughness of the shaft neck position are required to ensure the installation accuracy and good rotation performance of the bearing; There may also be lubricants designed to provide lubrication to critical parts such as bearings during equipment operation, reducing friction and wear and extending the service life of components.

Platen section

The press plate is a part that comes into direct contact with feed raw materials or materials and exerts pressure, and its shape and structure vary depending on the application scenario. In the pelletizing machine, the press plate is usually circular or annular structure, and its surface is matched with the press die of the pelletizing machine, and the feed raw materials entering the press die are pressured by rotation or relative motion, so that they are formed into granular feed through the die hole of the press die. The parameters such as surface roughness, hardness and flatness of the platen have a crucial influence on the quality of pelletizing. For example, the lower surface roughness of the pressure plate can reduce the friction of the material during the extrusion process, so that the particle molding is more smooth; The appropriate hardness can ensure that the pressure plate can maintain good shape and performance under long-term pressure and wear; The higher flatness ensures the accuracy of the fit with the die and prevents the uneven particle quality or equipment failure caused by the deformation of the plate. In the crusher, the press plate may take on different shapes, such as flat plates or shapes with special toothed structures, and its role is to work in conjunction with the grinding tool to squeeze, break and crush feed raw materials. The material and structural strength of the pressure plate need to meet the impact force and pressure requirements endured during the crushing process to prevent damage due to excessive force.

Connecting and fixing the structure

There are many kinds of connections between the spindle and the pressure plate, the common ones are bolt connection, welding connection and so on. The bolted connection has the advantage of being easy to install, remove and adjust, and the two are tightly connected using high-strength bolts by setting corresponding bolt holes on the spindle and the pressure plate. During the connection process, it is necessary to strictly control the preloading force of the bolt to ensure the reliability and stability of the connection, and to avoid deformation or loosening of the component caused by too large or too small preloading force. The welded connection can provide a stronger connection strength, which is suitable for some occasions where the stability of the connection is very high and does not require frequent disassembly. However, once the welding connection is completed, the later maintenance and adjustment is relatively difficult, so the use environment and maintenance needs of the equipment need to be considered comprehensively when selecting the welding connection. In addition, in order to further enhance the overall stability of the spindle connecting plate assembly, in its connection parts with the equipment body or other components, auxiliary connection and fixing structures such as reinforcing bars and positioning pins are usually used to ensure that under the working conditions of high-speed rotation, high pressure and strong vibration, the spindle connecting plate can run stably without displacement, loosening or deformation.

3. Material characteristics

High quality alloy steel

Such as 40Cr, 42CrMo and other alloy steel is one of the commonly used materials for spindle clamping plate. 40Cr alloy steel contains chromium, which can improve the hardenability and strength of steel. After tempering and surface quenching treatment, the surface hardness of the spindle can be significantly increased, up to HRC50-55, which makes the spindle have excellent wear resistance and fatigue resistance when subjected to huge torque and axial forces. In the application of the spindle of the granulator or crusher, it can effectively resist the wear and fatigue fracture caused by long-term operation to ensure the stable operation of the equipment. For the press plate part, 40Cr alloy steel can have enough hardness and strength after proper heat treatment to meet the extrusion and molding requirements of feed raw materials. 42CrMo alloy steel is more excellent in comprehensive performance, its strength, toughness and hardenability are high, and it can still maintain good mechanical properties under high temperature and high pressure environment. In some large, heavy duty or performance demanding feed machinery and equipment, such as the key equipment of large feed pelleting production line, 42CrMo alloy steel spindle plate can better cope with complex working conditions to ensure the reliability of equipment and production continuity.

Stainless steel

In the feed production environment with high health requirements, such as aquatic feed or pet feed processing workshop, stainless steel spindle plate is widely used. For example, 304 stainless steel has good corrosion resistance and oxidation resistance, which can effectively prevent the water, acid and alkali components in the feed and the erosion of the components by microorganisms, ensure the long-term stable operation of the equipment, and also avoid the pollution caused by the corrosion of the components to the quality of the feed products. Stainless steel spindle clamping plate also has a good surface finish, which is conducive to reducing the adhesion and residue of materials on its surface, and improving the cleaning convenience and production efficiency of equipment. In some high-end pet feed production lines, the use of 304 stainless steel spindle plate can ensure the quality and safety of pet feed, in line with the requirements of food grade production standards. For some special feed production processes, such as the production of feed containing high salt or strong acid and base additives, 316 stainless steel with stronger corrosion resistance may be selected to ensure that the spindle plate can still work normally in harsh environments.

4. Performance characteristics

Efficient power transfer and pressure application

With its reasonable structural design and high-quality materials, the spindle connecting plate can achieve efficient power transmission and pressure application. As the core component of power transmission, the spindle transmits the torque from the motor or reducer to the press plate stably, so that the press plate can act on the feed raw materials with precise speed and force. In the pelletizing machine, this efficient power transfer and pressure application ability ensures that feed raw materials can be uniformly passed through the die holes of the die, forming a regular shape and uniform density of pellet feed, improving the efficiency and quality of pelletizing. In the crusher, the spindle and the press plate can effectively transform the power into the crushing force on the raw material, so that the crushing tool and the press plate work together to quickly break the feed raw material into the required particle size to meet the requirements of the production process.

Good wear resistance and durability

Because in the feed production process, the spindle plate needs to be in contact with the feed raw materials for a long time and withstand huge friction, pressure and impact force, so good wear resistance and durability are its important performance characteristics. The use of high-quality alloy steel, stainless steel or special alloy materials, combined with appropriate heat treatment and surface treatment process, so that the spindle connecting plate can effectively resist wear and reduce surface loss. In the long-term operation process, its good wear resistance can significantly reduce equipment maintenance costs and downtime, improve production efficiency. For example, in large feed pelletizing plants, a set of high-quality spindle plates can work continuously for thousands of hours without frequent replacement, ensuring the stable operation of the production line and bringing considerable economic benefits to the enterprise.

High stability and reliability

The high precision manufacturing process and reasonable structure design of the spindle clamping plate make it have high stability and reliability under high speed rotation and high pressure working conditions. The precise machining and good balance performance of the spindle ensure that it does not produce excessive vibration and unbalanced force during rotation, reducing the impact on other parts of the equipment, such as bearing wear, loosening of the connecting parts, etc. The stable structure and precise matching accuracy of the pressure plate ensure that there will be no deviation, deformation or stuck in the process of applying pressure, ensuring the continuity and stability of the feed production process. In equipment such as feed mixers or pelleters, stable and reliable spindle plates can enable the equipment to operate normally in a variety of complex working environments and conditions, improving the overall performance and service life of the equipment.

5. FAQ

Q: What is the main material of the spindle connecting plate?

A: The spindle connecting plate is usually made of high-strength steel or alloy steel to ensure that it has sufficient strength and wear resistance. These materials can withstand high loads and long periods of use.

Q: What are the surface treatment processes of the spindle connecting plate?

A: The common surface treatment process of the spindle plate includes quenching, carburizing and nitriding. These processes can improve the hardness and wear resistance of the surface and extend the service life.

Q: How to ensure the transmission efficiency of the spindle connecting plate?

A: In order to ensure the transmission efficiency of the spindle connecting plate, the coordination accuracy between the shaft and the spindle connecting plate should be ensured, the lubrication system should be checked and maintained regularly, and the lubricating oil should be kept clean and appropriate.

Q: What are the special requirements of the spindle connecting plate in different application scenarios?

Answer: In different application scenarios, the spindle connecting plate may have different special requirements. For example, spindle clamping plates used in high temperature environments need to have high temperature resistance; For use in corrosive environments, corrosion-resistant materials are required.