1. Feed machinery and equipment accessories hammer product introduction

In the field of feed processing, the hammer is the key working part of the feed crusher, and its performance directly affects the important indicators of feed crushing efficiency, crushing particle size and energy consumption. Through the impact force generated by high-speed rotation, the hammer breaks the feed raw materials, crushing various grains, beans, straw and other materials into particles that meet the production requirements. With the continuous development of the feed industry, the design, material and manufacturing process of the hammer are also continuously optimized and innovative to adapt to the needs of different feed production processes and scales.

 

2. Structural characteristics

Shape design

The shape of the hammer is varied, common rectangular, stepped, diamond and so on. Rectangular hammer is a traditional and widely used shape with simple structure and convenient manufacture. Its four corners can have a strong impact on the material when rotating at high speed, which is suitable for general feed crushing operations, especially for occasions where the crushing particle size is not particularly fine. The stepped hammer is improved on the basis of rectangle, and its edge is designed with stairs of different heights. This structure makes the hammer in the rotation process, the contact time and Angle of different echelon parts and materials slightly different, thus increasing the number of strikes on the material and the crushing effect, and can more effectively smash the material into smaller particles. It is often used in the production of feed with higher requirements for crushing particle size, such as the production of young livestock feed or aquatic feed. Diamond shaped hammer has a unique shape advantage, its acute Angle part can produce a more concentrated and strong impact force when rotating, for some difficult to crush materials, such as straw feed with high fiber content, has a better crushing effect, and diamond shaped hammer in the crushing process can make the material in the crushing chamber to form a better circulation, improve the crushing efficiency.

 

Position and structure of mounting holes

The mounting hole on the hammer is the part connected with the rotor shaft of the grinder, and its position and structural design have an important influence on the installation stability and rotation balance of the hammer. The mounting hole is usually located in the center or near the center of the hammer to ensure that the hammer can be evenly stressed when rotating. The shape of the mounting hole is generally circular, and has certain accuracy requirements. Interference fit, key connection or other fastening methods are used with the mounting journal on the rotor shaft to ensure that the hammer will not loosen or displace during high-speed rotation. In order to facilitate installation and removal, some hammer mounting holes will be designed with chamfered or countersunk holes at the edge, making it easier to introduce tightening bolts or keys during installation, while also reducing stress concentration. In addition, in some large or high-performance shredders, in order to further improve the installation stability and balance of the hammer, double mounting holes or special shaped mounting holes may be used to make the connection between the hammer and the rotor shaft more solid and reliable, reducing the equipment failure and safety hazards caused by the loosening of the hammer.

 

Wear compensation structure (optional)

In order to prolong the service life of the hammer, some advanced hammer design adopts the wear compensation structure. For example, a replaceable wear-resistant liner or wear-resistant coating is provided on the working surface of the hammer. When the main part of the hammer is reduced due to long-term wear and tear, it is only necessary to replace the wear-resistant liner or repair the coating to restore the partial performance of the hammer, without replacing the hammer as a whole, which greatly reduces the cost of use. In addition, there is a structure that reserves a certain wear margin in the design of the hammer, that is, when the hammer is initially installed, the distance between the working surface and the rotor shaft is slightly farther than the normal working time. With the wear in the use process, the hammer gradually approaches the rotor shaft, and can still maintain good crushing performance within a certain wear range. Thus, the overall service life and economy of the hammer are improved.

 

3. Manufacturing process

Forged blank

The blank of the hammer is usually prepared by forging process. Forging can refine the grain of the metal material and make the organization more dense, thereby improving the strength and toughness of the material, and eliminating the internal defects caused by the metal in the smelting process. The forging process is particularly important for alloy steel hammer blanks, which can make alloying elements evenly distributed in the steel matrix and give full play to the strengthening effect of alloying elements. The blank after forging needs to be normalized or annealed to eliminate the forging stress, improve the cutting performance of the material, and lay a good foundation for the subsequent machining process. For example, for 20CrMnTi alloy steel hammer blanks, normalizing treatment after forging can homogenize the organization, moderate hardness, and facilitate turning, milling and other processing operations.

 

machining

Machining is the key link of hammer manufacturing, including turning, milling, drilling, grinding and other processes. First of all, through turning processing, the shape of the blank is processed to the design size, and the dimensional accuracy, flatness and surface roughness of each part are strictly controlled. In the turning process, it is necessary to use high-precision machine tool equipment and advanced tools to ensure that the shape accuracy and dimensional accuracy of the hammer meet the requirements. For example, the working face of the hammer requires a high flatness, and the general error is controlled within a very small range to ensure a uniform blow to the material during the crushing process. Then the milling process is used to process the shape of the hammer, such as rectangle, step or diamond, etc. According to the design requirements, the appropriate milling cutter and milling process is selected to accurately process the edge and Angle of the hammer. The drilling process is used to process the mounting holes on the hammer to ensure the position accuracy, diameter accuracy and cylindricity of the mounting holes, so that the connection with the rotor shaft is accurate. Finally, the grinding process can be used to fine grind the working face of the hammer to further improve its surface accuracy and finish, reduce the adhesion and friction of materials on the surface of the hammer, and improve the crushing efficiency. In the whole machining process, it is necessary to operate in strict accordance with the process specifications, and adopt advanced processing technology and quality control means to ensure the manufacturing quality of the hammer.

 

4. Performance characteristics

Efficient crushing capacity

With the strong impact force generated by its high-speed rotation, the hammer can crush various feed raw materials efficiently. Its different shape design and material characteristics enable it to adapt to different types of materials, hardness and fiber content. For example, the rectangular hammer performs well in the crushing of general grain feed, which can quickly break the grain into smaller particles; The stepped hammer has a better crushing effect on the hard bean feed, which can be crushed into a finer particle size to meet the requirements of young livestock for nutrient absorption. Diamond-shaped hammer is more efficient in the treatment of straw feed with high fiber content, which can effectively cut and break fiber and improve the digestibility of feed. The efficient crushing capacity of the hammer allows feed production enterprises to process a large number of raw materials in a short time, improve production efficiency, and meet the market demand for feed products.

 

Good wear resistance and durability

Because in the feed crushing process, the hammer needs to constantly contact with the material and withstand strong friction and impact, so good wear resistance and durability are its important performance characteristics. The use of high-quality carbon steel, alloy steel and surface strengthened material, combined with the appropriate heat treatment process, so that the hammer can effectively resist wear, reduce the 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 production enterprises, a set of high-quality alloy steel hammer after surface quenching treatment, can work continuously for thousands of hours without frequent replacement, to ensure the stable operation of the production line, for the enterprise has brought considerable economic benefits.

 

Stable working performance

The high precision manufacturing process and reasonable structure design of the hammer make it have stable working performance when rotating at high speed. The shape accuracy, dimensional accuracy and mounting hole accuracy of the hammer ensure that it does not produce excessive vibration and unbalanced force during rotation, reducing the impact on other parts of the mill, such as bearing wear, body vibration and so on. At the same time, the firm connection between the hammer and the rotor shaft of the crusher and its own structural stability ensure that there will be no problems such as loosening, falling off or deformation during the crushing operation, and ensure the continuity and stability of the feed crushing process. In the feed processing process, the stable working performance of the hammer helps to produce feed products with uniform particle size and stable quality, and improve the market competitiveness of the product.

 

5. FAQ

Q: What is the main material of the hammer?

A: The hammer 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 hammer?

A: The common surface treatment processes of the hammer include 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 hammer?

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

 

Q: What problems may occur during the use of the hammer?

A: The hammer may have problems such as wear, fracture, deformation or poor fit during use. These problems are usually caused by overload, inadequate lubrication, or material defects.

 

Q: What are the special requirements of the hammer in different application scenarios?

A: In different application scenarios, the hammer may have different special requirements. For example, hammers used in high temperature environments need to have high temperature resistance; For use in corrosive environments, corrosion-resistant materials are required.