I. What Causes Hammer Head Wear?

　　Linear velocity: The linear velocity directly affects the impact force and crushing ratio applied by the hammer head to the material, playing a decisive role in the product particle size. Excessive linear velocity will lead to a significant increase in hammer head wear (high linear velocity prevents the material from entering the impact zone, causing severe wear on the hammer head tip).

　　Changes in processing capacity and discharge gap: The processing capacity of the equipment has a certain impact on hammer head wear. When the processing capacity of the hammer crusher decreases, the product particle size becomes finer, the crushing ratio increases, and the unit wear of the hammer head also increases. Similarly, changing the size of the discharge gap changes the fineness of the product particle size, thus causing different degrees of wear on the hammer head.

　　Properties of the material to be crushed: The properties of the material to be crushed (element content, hardness, etc.), the size of the feed particles, the moisture content of the material, and the altitude of the location will all cause different degrees of wear on the hammer head. Among these factors, the properties of the material to be crushed have the *est impact on hammer head wear; the harder the material, the *er the wear on the hammer head.

　　Improper operation: As one of the wear parts of the crawler-type hammer crusher, the hammer head usually needs to be replaced after a certain period of use. When maintenance personnel replace the hammer heads, if they do not s the machine for inspection after installing the new hammer heads, and the bolts become loose (not tightened in time), it will accelerate hammer head wear.

　　II. Methods to Reduce Hammer Head Wear

　　Reasonable linear velocity: The hammer crusher mainly uses the hammer head to impact the material for crushing. The unit pure wear of the hammer head is directly proportional to the * and second power of the linear velocity. Therefore, while ensuring the product particle size, we need to choose a reasonable linear velocity for material crushing to minimize hammer head wear.

　　Improve hammer head utilization and reduce hammer head replacement time: The utilization rate and replacement time of the hammer head are closely related to its structural form and fixing method. During the crushing operation, a symmetrical structural form and a simple fastening method can be adopted, and solutions such as large flip covers and large inspection doors can be used to improve the metal utilization rate of the hammer head, thereby extending its service life. Modifying the hardfacing of the hammerhead: After the hammerhead wears down to a certain extent, applying hardfacing alloy to the worn surface can effectively reduce further wear.

　　Selecting hammerheads of different materials for materials of different hardness: When crushing materials of different hardness, different hammerhead materials should be selected. For example, commonly used high-manganese steel can be used for crushing materials of medium hardness; for crushing high-hardness materials, hammerheads with high corrosion resistance and high wear resistance must be used.

　　Strengthening daily use and maintenance management:

　　When installing the hammerhead, it is necessary to remove molding sand and burrs from the bolt holes and grooves of the hammerhead to ensure a tight and flat fit during connection; when tightening the hammerhead bolts, tap the oval head while tightening; after the hammerhead has been running for about half an hour, check the bolt tightness (after tightening, spot weld the nut to the thread to prevent loosening).