Excavator Undercarriage Parts SK350 Sprocket For KOBELCO?>
Product origin :Quanzhou Fujian China
Delivery time :30days
Supply capacity :20000pcs
SK350 sprocket is the basic transmission element in the excavator. The quality of the sprocket directly affects the noise, smoothness and service life of the transmission. SK350 sprocket has performance advantages such as high load capacity, high tooth surface hardness, high precision, high speed, high reliability and high transmission efficiency.
|Products Type||SK350 Sprocket|
|Place of Production||Quanzhou Fujian China|
|Use||Excavator, Bulldozer, ect|
|Technology||Forging Casting/Smooth Finish|
|Color||Commonly use color, Customized|
Repair method of Excavator sprocket
1. Insertion method: Insertion method is to insert a tooth with the same standard as the original tooth at the original broken tooth. The method is: before the inlaying, local annealing is performed on the broken teeth of the sprocket. If the hardness of the original tooth surface is not quenched, the greasy dirt on the broken teeth can be dried and removed to maintain the original shape of the broken teeth. According to the thickness of the teeth, first drill the sleeve thread (hole diameter is one-half of the tooth thickness), install the screws of the appropriate height, and then overlay the teeth with a high-quality electrode to form a tooth shape, then use a hand-held grinding wheel, chisel or file It can be processed by hand or mother machine, and the tooth profile must meet the standard.
The teeth are not as strong as the original teeth, and they cannot bear the load alone, so two or more teeth can not be inserted continuously; or the number of teeth (overlap) that the sprocket has in contact with each other during the same period of time is effective. More than one tooth, the load is shared between the two teeth, so as to reduce the load of the inlayed teeth. Therefore, the teeth can only be inserted under the condition that the number of effective contact teeth in the sprocket is equal to two. The number of effective simultaneous contact teeth is unrecognizable depending on eyesight and must be determined by calculation.
2. Tooth surface accumulative welding method: Any sprocket surface where erosion occurs and the incomplete parts caused by abrasion and extrusion can be treated by accumulative welding method. This method can be carried out by arc welding or acetylene flame welding. Before the sprocket is repaired by stacking welding, first remove the greasy dirt accumulated on the tooth surface, and clean it with kerosene. Dry the grease with cold air to make the tooth surface clean and expose the metallic luster. Hand or machined to standard tooth profile. In the welding method, it is necessary to prevent continuous welding along the teeth, and it must be performed at intervals. The number of spaced teeth is generally 4 to 7 teeth.This can prevent the teeth from melting at high temperatures and change the crystal structure of the metal.At the same time, it can also uniformly cool the temperature, and can avoid consecutive consecutive welding and deformation of adjacent teeth due to heat or deformation. Tooth pitch changes.
In order to ensure that the gear teeth are not affected by high temperature, the temperature should be cooled quickly. A water tank can be set. The temperature of water is generally about 30 ° C. A shaft is placed horizontally on the water tank, and the welded sprocket is strung on the shaft, so that the sprocket is immersed in water for nearly three-fifths. Immediately after welding one tooth, the welded tooth should be put into water for cooling, and then the other tooth should be repaired.
Tooth surface welding repair accumulation thickness: The remaining welding repair thickness after processing is not less than 1.5 ～ 2mm. After the tooth surface is processed by welding, a tooth template is used to check whether there are large and small teeth and whether there is a difference in tooth pitch.
3. Replacement ring gear method: This method is to turn all worn or damaged teeth, reassemble a complete sprocket ring, and then perform tooth processing. This method can be used for sprocket with diameter less than 1m and modulus. The connection of the sprocket rim and the wheel center is as follows: the sprocket with a large power transmission should be hot-loaded, and the sprocket with a low power transmission can adopt keys, pins, and welding methods. The thickness of the ring gear is generally not less than twice the total height of the teeth.