When using steel, steel shall conform to the technical requirements of GB / T 699-1999 and GB / T 700-2006 of the relevant provisions. When using steel castings, its chemical composition, mechanical properties after heat treatment and mechanical properties after heat treatment and impact toughness to meet the requirements, while the three-hinged steel fixed ball bearing, steel castings shall meet the following requirements; Steel Castings After machining, the surface of the presence of casting defects and appear not allowed when using the premiere and performance, allowing the repair, once more than the specified defects and cracks appeared presence of steel castings shall be allowed to use and repair. Before welding of steel castings, clearly showing the defect treatment should be good until the unidirectional sliding metal hinge steel ball bearing and distance from the edge of the groove and the groove 30mm range surface clean, honest to which grinding to meet the cast surface quality requirements, and shall have not welding. Cracks, slag porosity and other defects, pots and bottom welded ring up does not affect its mechanical properties. Steel castings to be cast in accordance with regulations ultrasound visits, and should reach the steel requirements, internal cracks are not allowed. Brass ring is the raw material used in ball bearing hinges, bearings Uno General brass, its mechanical properties and chemical composition of indicators should be specified. Determine the amount of jacking seismic steel ball bearing hinges, the bearing should be replaced according to the type of calculated after being top-up amount from possible rebound, such as rubber bearings, bearing should be calculated according to the coefficient bearing traits allowable value compressive modulus, compressive deformation values ??can only be calculated at this time bearing bearing dead load and live load when subjected to the design used may arise under and take the appropriate value will change as the control of the large branch The most general jacking seat to that of the control value, the purpose is to control to be able to successfully remove the damaged bearing the principle of determining the amount of lifting. Furthermore, when selecting replacement program, in order to avoid damage to the pier at the bone ring girders, should be based on the estimated amount of lifting steel ball bearing hinges, the design used in the calculation of concrete girder bridges allow consolidation tensile As the stress intensity jacking process control value, while the role of determining the position of the jack, Bin brigade complex role of local bearing stress positions, in order to have a local fraternity bearing surfaces safe. Step bearing replacement synchronous lifting. Construction preparation. Hao-brand finished steel ball bearing hinges, seismic steel ball bearing hinges, ball bearing steel hinges provided by Hao-engineering rubber. Search for "grid bearings, bridge expansion joints, water stop, bridge bearings, rubber bearings, spherical steel bearing" fly suppliers, network operators choose to have a full alliance Certified: Engineering Rubber Co., Ltd. Hengshui HaoTong (www.htgcxj.com), trustworthiness and reliability, "business alliance customer service" on page now click on live chat with us now!