Bearing preload force, tooth contact gap is too small, the frictional resistance increases after the temperature rise in heat. Gearbox temperature will cause overheating. Should be in accordance with the provisions of, cast bronze adjusting the tightening torque gearbox bearings and meshing clearance.
Lubricating oil level too low or too high: If the oil level is too low, rotating joint surfaces are not good lubrication,bronze bushing friction heat. If the oil level is too high, it would increase the rotational friction surface and the oil area, resulting in heating oil deterioration, thereby reducing the lubricating effect. Therefore, we raise oil to the gear box, it should foot the oil groove as the standard.
Another reason is that the tractor for a long time overload operation, gear carrying capacity is too large, the tooth surface by shear failure of oil film, increasing the friction heat. Correct choice of the tractor working speed,dry bushing not only can get the best productivity and economy, and can prolong the life of tractors. So, tractors do not often overworked.
The rapid development of Dalian die mold industry park industrial chain.
Dalian,plain bearing three facing the sea, is the center of the Bohai Economic Rim area, a beautiful environment, urban functional, by the United Nations awarded the "Habitat Award", the environment, "Global 500." Dalian is one of China's important industrial base, industrial base and strong, supporting good service, known as "Die kingdom", the mold industry has a strong industrial base, after 40 years of development history, the existing types of sleeve bushing mold manufacturing, processing and more than 1,200 related businesses, with 3 million people die mechanic.
February 1984, the State Council approved to set Dalian Economic and Technological Development Zone, becoming the first one of the 14 national development zones. Dalian City, Dalian City is located in the north side of the mold, DU bushing Dalian Economic and Technological Development Zone, established in 2003, to partition batches construction methods, by the National Light Industry Council and Dalian Municipal People's Government of China jointly organized the first mold industrial park master plan area of 4500 mu, with total planned investment of 20 billion yuan. bushing Development and construction of the city of Dalian mold goal is to build a mold design, mold training, mold information services, mold materials, mold equipment trading transactions and the international advanced level in the five functions of the mold industrial park, and by attracting foreign investment and other channels,brass bushing the introduction of domestic advanced mold outside the enterprise, management experience, technology and advanced equipment, has created a mature, high-end equipment, advanced technology, product competitiveness, the characteristics of a strong industrial park.
Construction of the city of Dalian die flexible market mechanisms, city businesses have formed the mold industry chain, to achieve a complementary advantages within the industry to achieve the effective combination of factors of production, mold the city's leader, concentration, scale effect is continually reflected on the lead and radiation Dalian and the surrounding areas of the mold industry plays a very important role.
Dalian Development Zone in recent years to develop the basis for modern equipment manufacturing industry, mold, Mould guide plate foreign industries by supporting the continuous progress of the localization process, the current rate of Dalian Development Zone business purchases more than 20% localization, of which nearly 80% of the mold industry, mold combined effect of the industrial park have begun to appear, plastic bushing for modern equipment manufacturing industry in Dalian industrial upgrading has laid a solid foundation. According to the International Mould & Plastic Industry Suppliers Association metal head Luo Baihui understanding of the city of Dalian die after 7 years of development and construction, the accumulated investment of 1.08 billion yuan. According to incomplete statistics, the city attracted a total of enterprises in Dalian mold 521, (335 mold manufacturing companies), sales reached 1.53 billion yuan, Dalian Development Zone Industrial Park has access to high-speed die development period.
City of Dalian mold molds are exported to the United States, Germany, Japan, Italy, 8 countries and regions, in addition to domestic products sold to all provinces and cities outside of Inner Mongolia. Die manufacturing city of Dalian has more than 30 tons with production capacity of large mold, the computer is widely used in mold manufacturing.
Mold city of Dalian has two materials market, with a total area of 46,000 square meters, has now become the largest in East China mold material professional market. Mold city of Dalian has a total area of 8480 square meters is also mold technology and equipment exhibition, runs a national mold manufacturing technology and equipment exhibition, wide range of domestic and foreign merchants come to the exhibition, business negotiations, business development and improvement for the city built "platform."
To support the development of mold companies, mold industrial park also developed a series of preferential policies. Mainly reflected in the establishment of support funds, plant fund subsidies, factory rent relief, loan interest subsidies, etc., but also can enjoy income tax relief zone, re-investment tax rebates, incentives such as tax exemption of imported equipment for own use.
In recent years, more and more attracted the attention of investors, and gradually developed into a set of mold development, manufacturing, training, technical information and modern logistics, property management and other professional production and service support in one of the industrial park. Die Park in accordance with the block development, giving priority to efficiency, improve utilization of the principles of carrying out construction and investment. Dalian Development Zone using foreign components supporting the annual Fair as a platform to further promote the docking of supply and demand components. Will also cover the production of large automotive stamping, plastic mold, and ultra-precision tooling investment enterprises as the main object, and guide and help medium-sized mold company, to support the expansion of its capital increase.
Last year, the Dalian industrial park development and construction of molds made new breakthroughs, new mold companies 23, 41, in which self-built area has been in full, mold standard factory zone 1 and 2, and in full production, 3 and 4, Park started and partially completed; mold platform service center has been started. At the same time, the zone has to die competition, innovation and school-enterprise cooperation model, etc., to promote the training of personnel die, the die technological level has been significantly improved; visit mold companies participating organizations, and actively contact the Japanese Cooperative, Federation of Industry and other help Enterprise open up the market; mold exports has risen markedly, an increase of 20%.
1997 Sino-US joint venture industrial park in Dalian Development Zone, East African Steel No. 41, the area of 11,000 square meters, with a total investment of about 14 million yuan, mainly engaged in steel products with high precision molds and precision bearings, and other standard parts production, its products, the average hardness and other technical indicators leading up to the domestic industry. The company to a domestic enterprises from supporting the production started, to present the country has grown to more than 300 companies do support mold. Recently, the East African Steel Industrial Park in Dalian in Dalian Industrial Park put into operation on the mold. This is not only the introduction of industrial park in Dalian die die steel products, the first project in Northeast China is the most advanced mold steel products production enterprises. The company moved to Dalian Development Zone, Dalian, East African Steel Industrial Park was established, and the plate from the industry, such as large foreign cooperation Concord dawn, to further improve the industrial park in Dalian die mold industry chain.