Concrete Pump Elbow Process flow
In the piping system, the concrete pump elbow is the pipe that changes the direction of the pipe. According to the angle, there are 45 ° and 90 ° 180 ° three kinds of the most commonly used, according to the project also includes 60 ° and other non-normal angle concrete pump elbow. Concrete pump elbow material is cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, nonferrous metals and plastics. The way to connect with the pipe is: direct welding (the most commonly used way) flange connection, hot melt connection, fused connection, threaded connection and socket connection. According to the production process can be divided into: welding concrete pump elbow, stamping concrete pump elbow, pushing concrete pump elbow, casting concrete pump elbow, butt welding concrete pump elbow. Other names: 90 degree concrete pump elbow, right angle bend, love and bend.
1, because most of the pipe for welding, in order to improve the quality of welding, the end of the car into the groove, leaving a certain angle, with a certain edge, this requirement is also more strict, thick side, the angle of how much and deviation The scope of the provisions are provided. The surface quality and mechanical properties are basically the same as those of the tube. For easy welding, the pipe is the same as the steel of the pipe being connected.
2, that is, all the pipe fittings have to go through the surface treatment, the inner and outer surface of the oxide scale through the shot peening spray, and then coated with anti-corrosion paint. This is for export needs, Moreover, in the country is also to facilitate the transport to prevent corrosion oxidation, have to do this work.
3, is the requirements for the packaging for small pieces, such as exports, you need to do wooden box, about 1 cubic meter, the provisions of this box in the concrete pump elbow number can not be more than one ton, the standard allows suits, Small, but the total weight is generally not more than 1 ton. For large pieces of y will be a single package, like 24 "must be a single package. The other is the packaging mark, the mark is to indicate the size, steel, batch number, manufacturers and other trademarks.
Seamless concrete pump elbow: Concrete pump elbow is a pipe for pipe turning. In the pipe system used in all the pipe, the largest proportion, about 80%. In general, different forming processes are selected for concrete pump elbows with different materials or wall thicknesses. Manufacturers commonly used seamless concrete pump elbow forming process is hot push, stamping, extrusion and so on.
Hot push forming
The hot concrete pump elbow forming process is a special concrete pump elbow push machine, core mold and heating device, so that the blank placed in the mold in the push machine driven forward, in the movement was heated, Diameter and bending process. The deformation characteristics of the hot concrete concrete pump elbow are determined according to the law of the volume change before and after the plastic deformation of the metal material. The diameter of the tube is smaller than the diameter of the concrete pump elbow, and the deformation process of the blank is controlled by the core mold. The compressed metal flows at the arc, compensating for other parts that are thinned by expansion, resulting in a concrete pump elbow with a uniform wall thickness.
Hot-rolled concrete pump elbow forming process has a beautiful appearance, uniform wall thickness and continuous operation, suitable for mass production characteristics, thus becoming a carbon steel, alloy steel concrete pump elbow main forming method, and also used in certain specifications Of the stainless steel concrete pump elbow forming.
The heating process of the forming process is medium frequency or high frequency induction heating (heating ring can be multi-lap or single lap), flame heating and reverberatory furnace heating, using what kind of heating method as the molding product requirements and energy decisions.