2019-11-29 13:19:36

Influence of bucket tooth wear on cutting force


According to the abrasion degree of bucket teeth, we divide the abrasion of test bucket teeth into three levels: zero level abrasion, i.e. new bucket teeth without abrasion; medium level abrasion, i.e. the radial abrasion length of bucket teeth is about 6mm, and the average abrasion surface length is about 22mm; heavy level abrasion, i.e. the radial abrasion length of bucket teeth is about 15mm, and the average abrasion surface length is about 30mm, corresponding to the abrasion ratio of bucket teeth used in mines Correspondingly, the length of the wear surface is about 1 / 3 of the length of the original bucket teeth After wear, the back angle of bucket teeth is equal to 0, the U angle increases obviously and the friction force increases rapidly.

 

The influence of wear on the cutting force of bucket teeth. (1) the cutting force increases sharply with the blunt wear of bucket teeth, especially in heavy wear, the linear cutting force is 6 times of that before wear; (2) the normal force also increases sharply with the blunt wear of bucket teeth, the normal force increases about 3 times in medium wear and 8 times in heavy wear In December 1995, the cutting force test was carried out on the wheel bucket excavator in Yuanbaoshan. When the bucket teeth were seriously worn, the whole bucket teeth pant cover was broken, which was caused by the excessive normal force; (3) from the macroscopic point of view, during the intermediate wear, the vibration of the machine itself was more severe, and the digging resistance increased significantly During the process of cutting, the vibration of the machine itself is abnormal and the working device part nods seriously Obviously, it is unreasonable for excavator to work under such bad working conditions, which will cause damage to all transmission parts, greatly overload the power of the equipment, shorten the service life of the machine, and reduce the production capacity.


Huangzuan Machinery established in 2008, is a specialized manufacturer of bucket teeth, bucket adaptor and side cutter which is used Caterpillar, Komatsu, Hyundai, Daewoo, Kobelco, Hensley, Liugong, Hitachi, XCMG, XGMA, Volvo, Esco, JCB .etc.

 With production facilities covering an area of 18136 square meters and staff of 100, our annual processing capability equals approximately 12,000 metric tons. we currently have the technology of lost wax casting, precoated sand casting, resin sand casting, have the advanced instrument such as spectromaxx, Brinell hardness tester, universal testing machine, metalloscope.