What Electrode Used For Excuvator Bucket Teeth Repair

The excavator gp bucket is the most easily damaged role of the excavator, and the bucket teeth are the most easily damaged on the bucket, so sometimes it is necessary to weld and strengthen the saucepan teeth, merely if the welding method is incorrect, the service life of the excavator gp bucket may be shortened. , What is the welding method of bucket teeth? What are the precautions when welding bucket teeth?

Precautions for the welding of bucket teeth

The welding place must be cleaned before welding

Information technology ways to remove the original croaky weld meat and grind it with an interphase grinder or apply a carbon arc gouging if possible, but the iron oxide must be polished after planing.

ii. A sure preheating must exist carried out earlier welding

If possible, preheat 100 degrees at the welding position. Then utilise the iii.2J507 welding rod for welding, and the welding will cease later a while, hit the weld and the border of the weld with a hammer, and continue hitting with a hammer until the weld is basically cooled. The purpose is to save welding stress, considering it is impossible to do rut treatment later on welding.

three. Appropriate welding materials must be selected when welding

The electrode type is very important. If you desire to know what material is, so you accept to take some iron cream tests, which volition come out subsequently a exam, and then distribute the welding rod according to the composition.

4. Excavator bucket body and saucepan teeth welding must ensure penetration

When welding, the penetration must be ensured. If the gap of the weld position is large, a back plate tin be added inside.

Welding method of saucepan teeth

i. Preparation before welding

Kickoff cut off the worn bucket teeth from the bucket body, and so employ an angle grinder to smooth the place where the bucket teeth are installed. There should be no dirt, rust, and check carefully for cracks and other defects; employ carbon arc on the bucket teeth to exist welded Gouging out the groove and clean it with an angle grinder.

2. Welding

(1) First, use GBE309-15 electrode on the bucket trunk (joint with saucepan teeth) for surfacing welding. The electrode must be dried at 350℃ for 15h before welding. The welding current should be too big and the welding speed should be slightly slower to ensure The nickel content in the fusion zone is five% to 6% to prevent the formation of martensite sensitive to cracks.

(two) Perform tack welding. After the bucket teeth are assembled in place, use a D266 electrode with a bore of 32MM to perform two-sided symmetrical tack welding, and the length of the weld should not exceed 30MM. Water cooling and hammering immediately after welding.

(3) Bottom welding. Use D266 electrode with a diameter of 32MM for bottom welding. Use small current, DC reverse polarity, intermittent welding, brusk department welding. H2o cooling should be done in time every fourth dimension welding is stopped, and the temperature of the interlayer should be controlled below 50℃.

(four) Fill welding. Afterwards the bottom welding is completed, apply D266 electrode with a diameter of 4MM for intermittent welding. The welding current is 160A. One electrode is divided into three to iv times to complete the welding. When the welding is stopped, the welding dewdrop must be cooled to fifty℃ with water in time. Below, hammering is performed to eliminate stress and prevent carbide precipitation; each two layers are welded, the left and correct welds are alternately welded to ensure the symmetry of the welding, until the weld foot reaches 16MM. Employ a magnifying glass to cheque the cracks after each weld. If in that location are cracks, use carbon arc gouging to eliminate them before welding.

Source: https://www.gochinaht.com/welding-techniques-of-excavator-gp-bucket-and-bucket-teeth.html

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