Fixing Method For Bucket Tooth And Bucket Lip After Assembly

In the whole process of using an electric excavator, maintaining long-term careful examination and being diligent in repair can always keep the bucket tooth closely matched with the bucket lip, so as to help the electric excavator shovel works and operates safely and efficiently.

Firstly, at the time of the installation of new electric excavator, accurate mapping size of outer assembly binding geometry parts of the inside bucket teeth and the bucket lip, and make out templates. Then after repeated testing and physical modification, finally draw the pattern out.

In the working process, use the bucket tooth model to test if the bucket tooth new parts assembly parts is qualified, with bucket lip model in the late using process of bucket to test the wear volume of the bucket lip. If the bucket lip has any wear or tear, use the intermittent time of maintenance and repair or replacement of bucket tooth equipment to bead weld on the wear parts of the surfacing, and polished it anastomose to the model, and then install the new bucket tooth.

Why The Excavator Bucket Tooth Casting Has Stomata

The stomata in bucket teeth casting is formed in the process of squeeze casting. In the process of liquid metal filling, the gas which has not been discharged will be entrapped into the liquid metal, and subsequently float. The floating rate of the gas is mainly related to the liquid metal viscosity. With the decrease of temperature, the liquid metal viscosity increases. When the liquid metal viscosity increases to a certain extent, the bubble buoyancy velocity tends to zero, then the bubble stops floating up but stay in the liquid metal. Then the stomata are informed.

The main reason for this situation is the unsmooth exhaust of casting mold. Gas in the cavity can not be discharged smoothly. In the filling process, the gas will be stored between the mold cavity and the liquid metal. Since the liquid metal can not completely dissolve the gas, and the part of the metal liquid which firstly contacts air will form a thin solidification shell in advance, the gas is which has not been discharged will gather in a certain internal region and finally the stomata appear. At the same time, as the squeeze casting is under high pressure to do the filling and solidification of liquid metal, the gas above will be compressed rapidly, thus creating conditions for the formation of bucket tooth stomata.