Intermediate frequency expanding machine for steel pipe thermal expanding common equipment, mainly for domestic large diameter steel pipe production cannot meet the demand of market and all kinds of steel pipe specification is not complete, meet the needs of small batch more varieties of steel pipe production, can satisfy the different material steel pipe hole enlargement and various non-standard steel tube expanding needs, is currently the main production process of large diameter steel pipe.

Medium frequency pipe expanding machine refers to the pipe fitting equipment that produces low density but strong shrinkage steel pipe, (seamless steel pipe) can be referred to as thermal expanding pipe.A fine rolling process in which the diameter of the pipe is enlarged by cross rolling or drawing.Expand the steel pipe in a short period of time, can produce non-standard, special type of seamless pipe, and low cost, high production efficiency, is the development trend in the field of pipe rolling all over the world.

Seamless pipe expanding machine is the main production technology of large diameter steel pipe at present.It has been widely used in military industry, power plant construction, aerospace industry and Marine industry equipment manufacturing, and has made a great contribution to the needed steel pipe industry and energy construction.Seamless pipe expanding machine equipment is used in the production of seamless steel pipe, straight seam welded pipe, coil pipe and other steel pipe thermal expansion.Can expand the variety of steel pipe: all kinds of carbon steel, alloy steel, stainless steel and so on.Cold drawn seamless steel pipe refers to the seamless waste pipe or seamless finished pipe as raw material, by cold drawing (drawing) machine drawing processing, the outer diameter size has the corresponding mold, the size is relatively precise.(Characterized by reduced outside diameter)

The production steps of the seamless pipe expanding machine are: after the pipe is worn out by the punch machine -- rolling -- tension reducing machine -- cooling -- straightening -- cutting head -- packing -- storage.(The state is continuous operation, and the dimensional precision is average)

Thermal expansion is made of seamless steel pipe as raw material in the pipe expansion machine heated to a certain temperature, the inner hole to add the required size of the mandrel to promote, the original diameter of seamless steel pipe expansion.(the outside diameter is increased, the size precision is general)

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