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 comply with the relevant provisions of the finished ball joints fixed bearing, while steel castings shall meet the following requirements; steel castings mechanically After machining, casting defects present on the surface and there are not allowed to use the presence and use of the premiere performance, allowing the repair, once more than the specified defects and cracks appeared not allow the existence of steel castings shall not be used and repaired. Before welding of steel castings, clearly showing the defect treatment should be good metal far and away the 30mm range bevel edge and bevel surface clean, honest to which the casting surface grinding to meet the 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 requirements unidirectional sliding the finished steel ball bearing hinges, 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. Displacement limit structure, usually considered the anchor steel or steel shear key two-way sliding the finished ball bearing hinge, a variety of structural concrete stopper, etc., no matter what kind of structure for the use of materials and the necessary functions and the structure, etc., may be considered a variety of forms. When using the seat must be open in order to secure the basic requirements oh Earthly 承桥梁 select the most appropriate form, the general bearing species to be when finishing bridge bearing arrangement should be based on the basic assumptions of the design, to ensure that the upper structure of the reaction force can be passed smoothly to the finished product on the lower ball joint bearing structure, and there should not be any constraints required displacement situations designer when designing bearings, should pay attention to the arrangement of the different types of bearings, such as the negative reaction force acting direction confirm the finished ball joints unidirectional and multidirectional bearing direction movable bearing activities through manufacturing _ Hao finished bidirectional slide ball bearing hinge ball joint mount _ Liaoning finished 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!