| The main technological process of pipe expanding machine
Equipment composition of pipe expander: mechanical pipe expander is composed of rotary roller device, lifting cone roller, transmission tie rod sleeve supporting roller, measuring roller, clamp trolley, diameter expanding head, tie rod, tie rod sleeve, hydraulic cylinder and frame of pipe expander, etc.The function of mechanical pipe expander is to expand and enlarge the diameter straight seam submerged arc welding pipe step by step with the expanding head, so as to obtain the roundness, straightness and dimensional accuracy required by standard technology.
The pipe expanding process of the pipe expanding machine: the flushing pipe is sent to the rotary roller device on the center line of the pipe expanding machine.Using this rotary idler, in combination with the camera system, the pipe weld is rotated precisely to the 12 o 'clock position to ensure that the weld will be able to enter the groove in the upper sector of the tool during subsequent expansion.The lifting cone roller table lifts the pipe to the center line of the pipe expander, and the position is controlled by the displacement sensor in the lifting hydraulic cylinder.The clamping trolley moves forward and is controlled by the metal detector to detect the end of the tube and is stuck. At the same time, a signal is sent to start the feeding roller of the clamping trolley, and the position is controlled by the encoder. During the moving process, the metal detector at the expanding head is set to detect the front end of the tube, so as to measure the position of the pipe.The length of the pipe is combined with the expanding head to automatically calculate the number of expanding steps.The jaws of the clamp can be rotated to avoid damaging the pipe wall.In the forward process, the height of the clamp can be adjusted to compensate for the deviation of the straightness of the pipe and optimize the straightening effect of the expanding machine.
The pipe expander automatically controls the medium frequency power to heat the steel pipe to the required temperature and keep it constant during the production of pipe expansion, which effectively avoids the scrap of the steel pipe and the die caused by the high temperature of the steel pipe caused by human factors, and avoids the fracture of the rod or the die caused by the rise of the thrust of the thermal expansion unit caused by the low temperature.Compared with manual operation to heat the steel pipe, the operation procedure is simplified and the labor cost is reduced. It can make one operator at most simultaneously monitor the normal production and expansion of multiple pipe expanding units.Each set of unit is equipped with two temperature measuring points for automatic temperature control.According to the preset heating temperature of different grades of steel tubes, the heating temperature of the steel tubes to be expanded can be selected and kept constant, and it can be displayed and recorded in real time, and the real time curve and historical curve of the heating parameters can be printed and saved.Provide guarantees for data traceability.
Pipe expanding machine can expand the type of steel pipe: seamless steel pipe, spiral welded pipe, straight seam welded pipe.Pipe varieties are: provide, alloy steel, stainless steel and so on.
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