Pipe end expanding machine

In the tube end expanding machine can produce steel pipe for 426 ~ 529 mm in diameter, and in the large cycle pipe rolling unit could obtain Φ below 660 mm seamless steel tube, so to get a larger diameter without rough steel tube must adopt the method of hole enlargement.At present, the main countries used in the broadening machine is hot dial and cross rolling two.In West Germany, the United Kingdom, the Czech Republic, Sweden and the United States of America and other inclined expansion machines, in France, the United States, the United Kingdom, Italy and Venezuela and other hot drawing expansion machines.The equipment of the cross rolling mill is more complex, and the steel pipe of the expanded diameter is easy to produce the spiral bar, and the surface quality is poor.Therefore, although its productivity is relatively high, at present, China still adopts the hot dial expanding machine, because the hot draw structure is simple to build, easy to operate.

Dalmine factory in Italy to install cycle mill of 100 tons of pulling force of hot expanding machine Φ 420 mm steel pipe can be expanded to 720 ~ 950 mm.When the diameter is enlarged, the tube heating well is dialed on the hot drawing machine and its diameter is enlarged.Heating once can be expanded four times, each diameter of 50~60 mm, so heating once can expand the diameter of 230 mm.Limited by heating and capacity and speed of hot drawing machine, the drawing speed is about 5 meters/min and the production capacity is 8~10 roots per hour.

The SCR, medium frequency induction heating coil, compensation capacitor, water cable, reactor and other components of the medium frequency power supply of pipe end reamer need to be cooled back and forth with water.The construction of the equipment:

1. Cooling back and forth water system (pool, water pump, water distributor, upper and lower water pipeline).

2. Storage platform for left and right steel pipes of the equipment.

3. Hydraulic oil for equipment: L-HM anti-wear hydraulic oil 32# ~ 100# (46# is recommended).

4. The equipment in the workshop is connected with wires and cables. See the equipment instruction manual for specifications.

5. Medium frequency induction heating coil and tube expanding die core can be purchased separately according to production needs.

Equipment: hydraulic pressure straightener, pipe end cutting band saw, steel pipe testing equipment.

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