Gear - this is one of the most common mechanical elements. Like everything else in our world, a gear may be broken one day. This occurs most often with cast iron samples. The fact that the cast iron gears for a long time, it was much easier than steel. Although cast iron for strength is not inferior to the latter, and is also able to withstand heavy loads, this material is very fragile and can break. This occurs most often when a sharp change in load.
Preparatory stage
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To carry out repair work needed materials and tools. To fill the gap between two adjacent intact teeth in relation to the broken need use a welding blanket of fiberglass cloth, flux doped with magnesium, as well as Bronze siliceous kernel.
To work need mandatory mini-drill and Bulgarian lathe and mites bieniemer and sandpaper. More will be required milling machine dividing head, cutter profile for forming cavities between the teeth, the cutter axis with a grip for the key shaft with a nut and a tubular abutment.
Do not forget about the need to have on hand measuring tools.
The working process
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The first step, preparation of the site for the soldering. With the help of a mini-drill and (or) the Bulgarians spend grinding broken tooth. To give a small roughness of the soldering, you can handle it a drill. This step will ensure a better grip with iron.
The second step, heat soldering. With gas-acetylene torch as the starting uniformly heat the soldering location, and adjacent thereto. This is done to minimize the risk of cracking. Thereafter, warming hot silicon rod. He falls into a container of flux. Further, the coating material should be placed on the stem cavity and melt burner so that was filled with the entire volume of the basin.
In order to solder the rapid cooling is not cracked, reduced space gear cover with a welding blanket and wait for complete cooling.
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The third step, the treatment ends with soldering. The gear wheel is installed in the lathe chuck with minimum acceptable beating aside. With the help of cutting tools remove the influx of soldering. Treat the gear sandpaper.
The fourth step, block preparation and milling. Is placed on a lathe unit gear and pinion. The axis of this should be harvested in advance by means of a cylindrical stop. Now it is necessary to make a holder for cutters. This is done using a lathe. After this will work on trimming the bar on the other side and the grinding procedure.
The fifth step, the formation of the tooth profile. The cutter holder is fixed in the machine spindle and eroded under the required size. At the final stage, a further polishing with sandpaper. The procedure is repeated for the tailstock. The most important step in this case - precise milling nomination.
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