Front Swing Spiral Welded Pipe Mill
The steel coils are unfolded and leveled by the mill equipment. And
they are sent to the forming machine in a certain angle.
Supplemented by a certain angle, the continual pipes are formed in
the principle of three-roll rolling machine. Continual spiral
welding is welded by submerged-arc welding machine. When the uncoiling, coil detaching, leveling, steel cutting and
welding are working, the host machine needs to stop and wait. After
the steel welding finishing, the host machine starts to work again.
The front-swing spiral welded pipe mill adopts intermittent
production method with advantages such as low investment, and
simple convenient.
According to the different function of our products, the front swing spiral welded pipe mills are divides in to API model and standard model. API model mainly produces the delivery pipe with
petroleum or natural gas (long distance). The material and quality
of the steel pipe need to be very good. The requirements for mill
equipment and testing equipment also are very high. The standard
model produces the pipe used for short distance delivery of natural
gas or water, the pipeline construction in the city, the structure
pipe, column pipe and so on. The requirements for the material and
quality of the coil also are very high.
This mill is our company's most advanced model, with the following
new technology.
A. Forming Machine Automatic Adjustment System
The adjustment of the molding machine adopts database and computer
automatic control technology. When changing specifications, it is
necessary to adjust the front axle angle, the six-component roller
angle, the six-group roller position, and the welding pad roller
angle. The previous adjustment work was done by experienced
workers, basically relying on workers' experience. In this way, it
is easy to adjust improperly, resulting in more waste pipes, and a
relatively large workload, which is very cumbersome. The angle and
position of the front axle of the unit and the forming machine to
be adjusted are controlled by the encoder. And according to the
theoretical data in advance, a complete database has been
established. When producing a certain specification of steel pipe,
you only need to input parameters such as width, pipe diameter, and
thickness on the computer, and all parts will reach the correct
position by themselves and start production directly. This reduces
adjustment work, reduces dependence on workers, and reduces waste
steel pipes.
B. Uncoiler Automatic Centering
The uncoiler console of this unit is equipped with an "alignment"
button. When this button is pressed, the double column head of the
uncoiler will automatically align with the center line. In this
way, the edge of the steel plate going in will be consistent with
the center line of the unit, without adjusting the vertical roll.
Improve production efficiency and reduce instability in the
production process.
Production Process:
Loading Coil - Uncoiling - Leveling - Cutting and Coil Welding -
Edge Milling Machine - Feeding Machine - Pre-bending and Guide
Board - Forming Machine-Internal Welding - External Welding -
Tracking and Cutting Off - Pipe Pulling Out - Welding Seam Grinding - Pipe End Expander - X-Ray
Inspection - Hydraulic Testing - Pipe End Facing and Beveling -
Ultrasonic Inspection - Pipe End Take Photo - Weighting, Measuring,
Marking - Finished Product Collection
