This
product is used to match welded ram bridge shell on various autos and drive
bridge of engineering machinery. The various hollow spindles made up of
solid bars using technology of war industry, after gone through medium frequency
heating process, are directly extruded inside the closed moulds on the press.
Comparing with the traditional solid spindles, produced by forge hammer,
the new product needs less or even no inner surface processing, saving a
great deal of manpower and material consumption. And it has an excellent
metal streamline, fine and close tissue, and good fatigue resistance. Totally
over one million tests have been done for that on the test-bed. The process
pioneers in China and reaches advanced level in the world among like products.
It is appraised as one of the Key New Products of the state jointly by five
ministries and committees including the State Science and Technology Committee
of PRC, the State Technology Supervision Administration, and the State Bureau
of Foreign Experts Affairs. The semi-bushes specified for Benchi heavy trucks
have received a passport to substitute imported ones after inspection by
German experts. We have developed over 200 different products including the series of spindles for heavy, medium, light sized trucks and army vehicles, wheel side supporting shafts for loaders, fork trucks, and other engineering machinery, as well as semi-finished gear wheels. The total annual production reaches 1,200,000 pieces, a substantial portion of which has been exported to international market. We are also the appointed producer by DongFeng Motor Corporation, China National Heavy Truck Group Corporation, China FAW Group Corporation, Jianghuai Group and Baotou Beifang-Benchi Heavy-duty Truck Co., Ltd.
We have now become the largest specialized production base for hollow bushes for the whole country. Our advanced technology and equipment plus the powerful research and development team secure a fast delivery and circumspect service of our high quality products.
The hollow shaped through a closed hot extrusion process is lighter than that done by forge hammers. The utilization rate is thus increased.
The semi-finished steel, subjected to stresses from three directions during the shaping process, obtains an ideal full-fiber metal streamline and fine tissue along its axial direction. The mechanical performance and service life of the parts are, therefore, greatly improved.
The quality of semi-product is in conformity with GB12361-90, the General Technical Conditions of Steel