China Round to Square Welded Pipe Mill

Round Weled Pipe Mill Without Roller Changing
The round pipe mill without roller changing is our developed newest product. During the diameter changing, the whole complete forming line does not need to change the roller in compared with before precise forming roller changing. Then, the investment for the roller can be saved, which is suitable for the large and medium diameter machine. During the diameter changing, the adjustment of roller is automatic too. It only needs to input the diameter, pipe wall thickness, material and other parameter in the IPC. Then, the entire roller will be automatically adjusted to the right position. Then, the machine can be started directly to have the production. A lot of time can be saved for the roller changing to let the variety diameters pipes production in little quantity to be possible. It improves the machine efficiency and machine starting rate. Besides, automatic adjustment can make the adjustment accurate, decrease the error on the manual adjustment, improve the qualified rate, and the economic efficiency.
This kind of machine can produce top grade pipe in the high standard API pipe and the normal fluid pipe and structure pipe.
Recommended model
1. Φ108~Φ219 mill,Wall thickness range: 2-12mm,Max. material: X80;
2. Φ114~Φ273 mill,Wall thickness range: 2-14mm, Max. material: X80;
3. Φ127~Φ325 mill,Wall thickness range: 3-16mm, Max. material: X80;
4. Φ168~Φ426 mill,Wall thickness range: 3-18mm, Max. material: X80;
5. Φ219~Φ508 mill,Wall thickness range: 4-20mm, Max. material: X80;
6. Φ273~Φ630 mill,Wall thickness range: 4-22mm,Max. material: X80;
7. Φ325~Φ711 mill,Wall thickness range: 5-25mm, Max. material: X80;
Recommended production process:
Coil loading-Uncoiler-Leveling-Steel cutting and welding-Accumulator-Fine leveling-Forming-HF welding-Water cooling-online UT detector-IF annealing-stable steel pulling-Air cooling-Water cooling-Sizing-After saw sizing cutting-Pipe end facing and beveling machine- Hydrotester -Offline UT welding seam and pipe body detector-weighting, measuring, marking-Pipe storage

Technical FeatureRoll preparation → Winding car → Unwinding → Detach straight machine (lead head, shovel head, straight head) → pinch leveling machine → cross shear machine → centering and protection roller → disc shear → waste edge coiler → Looper device → Steel coil bending device → Tension device → Winding machine → Baler → Unloading trolley
Technical CharacteristicsThis unit summarized the experience and lessons of the previous generation of thick-wall high-strength slitting units, and designed a number of equipment for high-strength thick-wall materials to ensure the normal and stable production line. The unit uses hydraulic and pneumatic systems in many places, which can realize local automatic control. The electrical part adopts PLC control and full digital AC variable frequency speed regulating device, which can realize the linkage and self-locking of the whole process. The operation of the whole unit is simple, the labor intensity of the workers is low, and the maintenance is convenient.
Automatic alignment This unit adopts the unwinding machine automatic centering technology, which is used to automatically center the steel coil to the unit's center line after the unwinder is loaded with the steel coil. The alignment of the steel coil is very important for the slitting unit, which directly affects the normal operation of the unit. If it is not aligned, it needs to be adjusted continuously during the work process, and even serious accidents such as burr shearing and coiling skew will occur, causing Unit shutdown adjustment greatly affects unit production efficiency. If there is no automatic alignment technology, alignment will become very difficult, and due to artificial alignment, there will always be misalignment, which will affect the normal production of the unit.
Quick unwindingThis unit adopts rapid unwinding technology, which can quickly dismantle the coil head and send it to the pinch leveler. The speed of unwinding has a lot to do with the blade. This unit uses a blade with a support roller. After the blade opens the steel coil, the support roller is raised to support the steel belt, and the blade is separated from the steel belt. The problem that the steel belt of the head is not well forwarded makes the unwinding very easy and smooth, which improves the efficiency of the unit.
Fast edge unloadingThis unit adopts the waste edge quick discharge technology, which can easily unwind the wrapped waste edge coil, and no longer need to use a crowbar to laboriously discharge.
Head and tail bending of steel plateThis unit adopts the head and tail bending technology of steel plate, which can ensure the smooth winding of the first circle and the safety of the strapping of the last circle. The original technology, the steel plate is inserted into the coiler's jaw, and it is easy to jump out during the first lap. It must be repeated several times before it can be coiled smoothly. We press out the bend on the steel plate's head in advance so that it will not jump out of the jaw. The coil can be coiled smoothly; the tail of the steel plate is lifted in the last circle, which easily cuts the packing belt and causes a safety accident. We press out the bend at the end of the plate in advance to avoid cutting the packing belt and avoid safety accidents.
Quickly introduce steel strip into separatorThis unit adopts the technology of rapid introduction of steel strip separators, which can quickly adjust the position of steel strips that are not cut apart but cannot be split and cannot correspond to the separators, and can be quickly introduced into the separators. The introduction of the way of increasing the hammer without using a manual crowbar improves the efficiency of the unit, reduces labor intensity, and reduces the hidden dangers of work injuries. This device is provided on the pre-separation device and the winding machine, so that the work of introducing the steel bars of the thick-wall high-strength slitting unit into the separator is very smooth, and no manual participation is required.
Reliable jaw clampingThis unit adopts reliable jaw clamping technology, which solves the problem of inseparable jaw clamp of thick-wall high-strength plate slitting unit.
Safety follow-up pit cover
This unit adopts the follow-up pit cover technology, which solves the problem that workers easily fall into the pit when packing work at the coiler. The unloading car comes with a pit cover. The pit cover is connected to the car body of the unloading cart and moves with the movement of the car body. When the unloading cart is driven below the take-up shaft, the pit cover can be Cover the pit of the unloading trolley outside to make it easier for operators to pass through and avoid accidents at work.