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In view of the defects of the original transfer case (PTO) shell used in the mine truck, such as large vibration, easy deformation, high heat and not easy to spread, easy to cause early damage of bearings and oil seals, etc. The new PTO is to solve the above problems, let the product get better use effect.
the old PTO
the new PTO
The new PTO adopts three-dimensional mechanical modeling, more scientific use of mechanical and heat dissipation optimization, which makes the connection surface of the original structure itself, increases the load that can bear, increases the strength at the key position, improves the impact performance, and the product mould is made of alloy material
The Ashland PEP set resin sand process in the United States is adopted. Compared with other resin sand processes, the resin sand has better hardening performance, high temperature strength and yield, and the casting accuracy can reach ct9 level. After pouring, the product is opened to the outside of the box when the temperature is kept below 300 ℃ in the sand mold. The residual stress of the product as cast is small, and the stress relief annealing is carried out again to completely eliminate the residual stress. The sand size is 50-100 mesh and alcohol based coating is used at the same time. The surface finish of the casting can reach ra25. The raw materials are Elkem alloy and high-purity pig iron from Norway. At the same time, it is equipped with a complete set of testing equipment such as German spectro direct reading spectrometer, thermal analyzer, non-destructive testing and molding sand experiment, which effectively guarantees the quality control of all links, and the detection rate of molten iron and mechanical properties is 100%.
Through the above technical transformation, not only the strength of the product is improved, but also the NVH performance is improved, especially the durability of the product is increased, which has a positive effect on cost reduction and efficiency increase for users. At the same time, it has practical significance to reduce the maintenance cost of tramcar.
Through the above technical transformation, not only the strength of the product is improved, but also the NVH performance is improved, especially the durability of the product is increased, which has a positive effect on cost reduction and efficiency increase for users. At the same time, it has practical significance to reduce the maintenance cost of tramcar. The above is some simple sharing, if we can bring some inspiration and help, we will be honored to!
