1. What are the reasons for the wear of the hammer head?
1.1 The size of the material's non-linear velocity: The size of the linear velocity directly affects the impact force exerted by the hammer on the material and the size of the crushing ratio, which plays a decisive role in the particle size of the product. Excessive linear velocity can lead to a sharp increase in hammer wear (the linear velocity is too high, which enables it to enter the impact zone, and the end of the hammer is caused by severe wear).
1.2 Changes in processing capacity and discharge clearance: The processing capacity of the equipment has a certain impact on the wear of the hammer head. When the processing capacity of the hammer crushing station decreases, the particle size of the product will become thinner, the crushing ratio increases, and the unit wear of the hammer head also increases.Similarly, changing the size of the discharge gap causes the thickness of the product particle size to be changed, resulting in varying degrees of wear on the hammer head.
1.3 The nature of the material to be broken: The nature of the material to be broken (element content, hardness, etc.), the size of the feed particle size, the water content of the material, the altitude of the area and other factors will bring different degrees of wear to the hammer head.Among these factors, the nature of the material to be broken has a great impact on the wear of the hammer head, and the harder the material, the greater the wear on the hammer head.
1.4 Improper use and operation: The hammer head is used as one of the vulnerable parts of the crawler hammer crushing station. When it is used for a certain period of time, it usually needs to be replaced.When the repairman changes the hammer head, if the new hammer head is installed, it does not stop for inspection in time, causing the bolts to loose (failure to be fastened in time), it will cause the wear of the hammer head to accelerate.
2. Methods to reduce the wear of the hammer head
2.1 Reasonable linear speed: The hammer crusher mainly uses the hammer head to impact the material for crushing operations. The unit pure wear of the hammer head is proportional to the primary and secondary powers of the linear speed.Therefore, under the premise of ensuring the particle size of the product, we need to choose a reasonable linear speed for the crushing of the material to maximize the wear of the hammer.
2.2 Improve the utilization rate of the hammer head and reduce the replacement time of the hammer head. The utilization rate and replacement time of the hammer head are closely related to its structure and its fixing method.In the process of crushing operations, symmetrical structural forms and simple fastening methods can be used to improve the metal utilization rate of the hammer head through large clamshells, large access door enclosures, etc., thereby extending the service life of the hammer head.
2.3 After changing the wear of the surfacing cemented carbide hammer head to a certain extent, surfacing the cemented carbide on the wear surface can also effectively reduce the wear of the hammer head.
2.4 Choose hammers of different materials for materials of different hardness. When crushing materials of different hardness, choose hammers of different materials. For example: commonly used high-manganese steel materials can be used for crushing medium-hardness materials; hammers with high corrosion resistance and high wear resistance must be used for crushing high-hardness materials.
2.5 Strengthen daily use and maintenance management. During the installation of the hammer head, the sand and burrs in the holes and notches of the hammer head bolts must be removed so that the hammer head can fit flatly when connected; when fastening the hammer head bolts, hammer the elliptical head while fastening; check the bolt fastening situation in time after the hammer head is running for about half an hour (after fastening, spot welding the nut and thread to prevent it from loosening).
