180 degree elbow 45 degree elbow 90 degree elbow elbow hot pressing elbow

Seamless Elbow: The elbow is used in a pipe bend pipe fittings. All fittings used in piping systems, the largest proportion of about 80%. Typically, selection of different material or thickness of the elbow different molding processes. At present, the factory used seamless elbow forming process heat pushing, punching, squeezing. Hot pushed elbow forming process is the use of special elbow pushing machine, mandrel and heating device, set the mold on the blank the pushing machine driven forward movement, the movement is heating, flaring and bending process. Hot pushed elbow deformation characteristics according to the law of constant volume before and after plastic deformation of metallic materials to determine the tube diameter, the tube diameter is smaller than the elbow diameter mandrel to control the deformation process of the blank, the inner arc at The flow of the compressed metal, the compensation to the other parts of the thinning due to the enlarged diameter, thereby obtaining a uniform wall thickness of the elbow. Hot pushed elbow forming process has a beautiful appearance, uniform wall thickness and continuous operation, suitable for high-volume production characteristics, and thus become the main method of forming of carbon steel, alloy steel elbow, and is also used in some specifications stainless steel elbow forming. The heating of the forming process intermediate frequency or high-frequency induction heating (heating ring for multiturn or lap), flame heating, reverberatory furnace heating, what heating methods depending on to forming product requirements and energy decided. Stamping elbow was first used in the mass production of seamless elbow forming process, in the the common specifications elbow production hot extrapolation or other forming process replaced, but some of elbow production of a small number of wall thickness is too thick or too thin. Still in use when the products have special requirements. Stamping of the elbow tube, with the elbow outer diameter equal to the direct compression molded using a press in a mold. Before stamping, tube placed on the lower mold, the inner core and end mode loaded tube, upper die downward movement began to suppress, the elbow forming by the constraints of the outer mold and the internal model supporting role. Compared with the heat pushing process, stamping the appearance quality than the former; stamping elbow outer arc in a stretched state in the molding, no other parts of the excess metal to be compensated, so the wall thickness of the outer arc at approximately about 10% thinning . Apply to single-piece production and cost characteristics, stamping elbow processes used for the manufacture of small quantities, thick-walled elbow. Stamping elbow points to the two kinds of cold stamping and hot stamping, cold stamping or hot stamping is usually selected according to the material properties and equipment capacity. Cold extrusion forming process of the elbow is dedicated elbow forming machine, tube into the outer mold, the upper and lower mold clamping, under the impetus of the putter, the tube along the inner mold and outer mold reserved Movement gap to complete the forming process. Contact Lilley Tel 18631715058 online QQ2559870756