How to fix three bulldozers along?

Three bulldozers area belong consumable parts, according to its design and construction conditions the use of life there is a certain number of years, often much lower than the normal life or overhaul life high driven bulldozerother components. For large-scale imports of three small crawler bulldozer area, the use of a newer approach to the old abandoned due to more expensive, maintenance costs too much, and the residual value of the old parts are also being wasted; if they can adopt reasonable repair method, you can greatly Update reduce costs, and to ensure their life, but also much more cost-effective than the use of non-original parts imported or domestic parts in performance price. Caterpillar Farming Crawler Bulldozer below three area repair technology, equipment and effects briefly described as follows:
A repair method and process
Three rounds in the vicinity of wear mainly refers crawler track surface between each wheel housings and rolling and sliding sleeve and drive pin crawler between teeth wear. Analysis shows that when the surface of the wear limit is reached, due to the internal shaft parts in a sealed lubrication, yet most of the failure. At this point, if they can carry out welding repair its worn surface, to restore the original size, you can extend the life of three rounds in the vicinity.
Welding repair ago, the first of the worn surface rust treatment; and then warmed preheated to about 250T, to eliminate these artifacts in use due to rolling. Internal stresses generated by the impact; then with a soft wire bottoming 105B (increase weld strength), general welding 2-3 layers, other dimensions filled with 104 wire. In the weld repair process should select the welding current and wire feed speed according to the size of the wheels and caterpillar thickness, in order to ensure the quality of welding repair and appearance. Workpiece after welding requires incubation (especially in winter), but need not be subjected to surface treatment (due to the choice of solder is very close to the original performance and can achieve the surface hardness of the original).
It is worth mentioning that the wear limit for the amount of wear is not 70% or more than 120% of the area of ​​three, not advocate the use of welding methods to repair, because the workpiece is either a surface-hardened layer is not completely worn away, either shape and other phenomena, welding success rate decreases.
For like wheels, chain links along the circumferential surface of the worn parts, welding methods can be used to repair; and for like caterpillar pin sets this fan-shaped area in less than 180º locally worn parts can be taken to make the process turn sets reuse. Since in most cases, the pin sleeve always wear faster than the external link wear rate (both wear ratio of about 2: 1), especially when the pin sleeve wear limit is reached, the hardened layer has finished grinding, and then continue to use the wear rate will accelerate, and the remaining service life is very short, then the likelihood of oily type of caterpillar increase oil loss, increased chance to say pin wear. Therefore, when it approaches the wear limit promptly turned around and pin set, replace the seals and grease, you can extend the life of the pins set to double, allowing more efficient use of surplus value chain links and pins.
2, the main repair equipment
Tracked face major repair equipment and surfacing machines and three tracked changer, can wear welding surface to restore the original size and welding repair or disassembly is required caterpillar turned pin sets to achieve track shoe disassembly mechanization. These devices high degree of automation, reliability, enabling batch repair. Currently, Beijing, Guangzhou, Jiangsu, Shanxi, Inner Mongolia and other places are from the United States or Japan, the introduction of these devices, users can conveniently serviced.
3, the quality and effectiveness analysis
After repair welding, turning three sets and other craft repair area, its service life can reach 80% -90% of new products, the average repair cost is only about 30% of new products, repair cycle is shorter than the import of new cycle. Therefore, when just at or slightly exceed the wear limit of three area repair, after all, a good way to update.