Power Drive Chain Manufacturers introduces the common causes of chain damage:
1. Wear and damage
In the open transmission or the stainless steel chain with the worst quality and poor material, wear is usually the primary damage method of the stainless steel chain transmission. After the stainless steel chain is worn out, the chain links and the total length of the chain are extended. When meshing, the meshing point moves along the working side of the tooth profile to the top of the tooth, which eventually causes the tooth to jump or the chain to fall off. The wear is mainly caused by the outer link. When the outer surface of the pin shaft and the sleeve inner group are worn out, the hinge gap increases, which causes the outer link to extend. The pitch of the inner chain links depends on the bus bars on the same side of the adjacent rollers. Because the rollers have little wear on the outer surface and the sleeve, the inner chain links hardly extend. When the wear and elongation of the stainless steel chain reach 3%, the stainless steel chain will be damaged due to chain disconnection. At this time, the elongation rate of the outer chain link can reach 6%. In order to advance the wear life of the stainless steel chain, it is necessary to pay attention to the smoothness and constrain the useful circle force within the allowable working load.
2. Fatigue damage
Stainless steel chains with outstanding smoothness and wear resistance are usually damaged due to fatigue damage. Due to the tight and loose edges of the stainless steel chain, the stainless steel chain parts are subject to alternating loads of large and small. In each revolution of the chain link, the force of the stainless steel chain is stretched and twisted, the force of the pin is sheared, kneaded, and twisted, the roller receives kneading and impact, and the sleeve receives kneading, Shear, and shock. Under the effect of alternating load, the parts produce cracks and the cracks propagate, causing fatigue and fracture. The number of impacts of the stainless steel chain can be regarded as the number of stress cycles of the stainless steel chain parts. In practice calculations, each revolution of the stainless steel chain usually only considers the impact of the hinge when it is engaged, so the number of revolutions per minute of the stainless steel chain is regarded as the number of impacts per minute. In order to improve the fatigue strength of the stainless steel chain, the manufacturer chooses various methods to strengthen the parts. For example, chemical heat treatment is used to carburize the surface of the parts. Stress buildup shot peening of parts, etc.
3. Damage to the connection strength
During the use of the stainless steel chain, under the effect of the workload, the joints between the outer stainless steel chain and the pin shaft and the inner stainless steel chain and the sleeve are loosened, so that the stainless steel chain holes are worn, and the stainless steel chain is quickly elongated and damaged. The stainless steel chain will be damaged due to the loosening of the riveted part of the stainless steel chain pinhead, the stainless steel chain falling out, or the chain link falling due to the shearing of the gear pin and the flying off of the circlip.
4. Stainless steel chain gluing
When the stainless steel chain runs at too high a speed and is not smooth, the pin and sleeve will be scratched and stuck and cannot be used.
5. Static break
At low speed and heavy load, the load peak exceeds the allowable breaking load, causing the stainless steel chain to break.
The stainless steel chain is repeatedly started, braking, forward, and reverse. The stainless steel chain is thinned due to side wear, or due to the wear and plastic deformation of the sprocket teeth, and the sprocket device is not coplanar, etc., may form a stainless steel chain. damage.