Spiral Welded Pipe Machine

SWP and SWJ Machines

ALL SPECIFICATIONS CAN BE DESIGNED ACCORDING TO THE CUSTOMER REQUIREMENTS.

+ Main SWP components are listed above ( some units are optional ).
+ Uncoiler System firstly is to used to open and to feed the first edge of the coil the strip edge joining system, secondly it is used to bend the trailing edge of the coils.
+ Strip side guide stands are designed to feed the strip in the correct position from the uncoiler to the forming section.
+ The pivot line and the cross side rolls are both positioned by hydraulic cylinders.During the production the position of the pivot side rolls should not be changed.
+ Non-pivot line rolls are under adjusted pre-set hydraulic pressure and allow small movements of the rolls to eliminate the minor movement of the strip.
+ A series of five non-driven straightening rolls is pressured to the strip through hydraulic cylinders.
+ The edge miller works as synchronized with SWP and MCC of EMM has connection with the MCC of SWP so both machine controls each other.
+ Main drive assembly is movable to right and left to adjust the center of main drive rolls according to the centerline of the strip.
+ Main drive power is variable speed D.C. drive with remote speed control at the operator’s console.
+ Strip edges are bent slightly convex between top and bottom rolls before forming to prevent negative bending during forming.
+ A steel rail assembly that is located above and below the strip to control “tenting” and maintain flatness.The rails have a set of wheels to minimize friction.
+ The #1 welding station, the three roll forming apparatus and the pivot position are in immediate proximity to the machine operator.
+ Lead, mandrel and buttress rolls are heat-treated cold work alloy steel rolls.
+ Rolls are yoke mounted and permit mechanical positioning to the corresponding strip in-feed helix angle.
+ The lead roll and buttress roll table is adjustable under power back and forward, which permits the operator to pre-bend the strip and adjust for center-line pipe exit to the discharge table.
+ Mill and inner dia. welder control devices are provided at the mandrel position.
+ The pipe support assembly is designed to keep pipe in stable position at the forming area.
+ Pipe hold down system prevents cracks from forming in the weld.Also this system is very helpful to reduce the high residual stress on the pipe and consists of multiple roll rows to prevent damage that could be caused by rolls on the pipe surface.
+ Pipes are carried on the run out section by the vertical pipe supports which can be adjusted manually from the rolls (on the each vertical support) in the horizontal direction according to the pipe diameter.
+ V type supports are designed to keep the pipe on the centerline of the run out.
+ Outside welding position can be adjusted easily by vertical and horizontal movements actuated by electrical motors according to pipe diameters.
+ Ultrasonic testing device includes carriage frame for probe holders of ultrasonic device and height of system can be adjusted by the motorized sliding system according to pipe diameter.
+ Pipe length can be adjusted as requested by using Pipe cut off unit system which includes one unit carriage frame movable forward and backward, one unit plasma holder and mechanical tracking system of plasma unit.
+ Pipes seperated by the accelerators after cut off operation and to gain time for this pipe at the kick out system for preventing touching of two pipes to each other.
+ Pipe kick out systems are designed as bridge type so when kick-out is actuated by hydraulic cylinders one side will be higher than the other side and pipe will be rolled to this side.
+ The 3-roll straightener is designed to flatten the strip, removing deformations of the coil leading and trailing ends.
+ Angular changes for diameter are made through a hydraulic cylinder attached to the mill base and floor.Operation is controlled from the #1 welding station located at the three-roll operator’s station.
+ Coil end joiner is designed to cut the leading and trailing edges of the strip in preparation for cross welding coil to coil.The cutting operation is accomplished with an oxy-acetylene system.

ALL SPECIFICATIONS CAN BE DESIGNED ACCORDING TO THE CUSTOMER REQUIREMENTS.