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Tack Welding Machine

In the LSAW (Longitudinally Submerged Arc Welded) pipe making production line, a pre-welding machine is a crucial component used to perform preliminary welding on the steel plates before they are formed into the desired pipe shape. The pre-welding process is an essential step in preparing the steel plates for the subsequent pipe forming and final welding stages, ensuring that the plates are securely joined along their edges to create a continuous and seamless pipe.

Key features and functions of the pre-welding machine(tack welder) in the LSAW pipe making production line include:

1. Edge Preparation: The pre-welding machine prepares the edges of the steel plates to be joined. It may perform operations such as beveling, chamfering, or grooving to create the necessary joint configuration for welding.

2. Welding Method: The pre-welding machine typically uses the Submerged Arc Welding (SAW) process, where an arc is created between the welding electrode and the workpiece while a granular flux covers the weld zone, ensuring a high-quality and efficient weld.

3. Material Handling: The machine incorporates a robust material handling system to efficiently feed the steel plates into the pre-welding process and move them along the production line smoothly.

4. Weld Seam Tracking: Advanced pre-welding machines may include seam tracking systems that monitor and adjust the welding path in real-time, ensuring accurate and consistent welds along the entire length of the plate.

5. Welding Control: The pre-welding machine’s control system allows operators to set and adjust welding parameters such as welding speed, current, voltage, and flux feed rate, ensuring precise control over the welding process.

6. Weld Quality Inspection: Some pre-welding machines may incorporate quality inspection systems to detect any welding defects, such as porosity or irregularities, ensuring the integrity of the welds.

How the Pre-welding Process Works in the LSAW Pipe Making Production Line:

1. Plate Preparation: Steel plates, usually in the form of coils, are uncoiled and prepared for the pre-welding process. The plates are cleaned and inspected for any defects or imperfections.

2. Edge Preparation: The edges of the steel plates are prepared by the pre-welding machine, which may perform operations like beveling or chamfering to create a suitable joint configuration.

3. Pre-welding: The pre-welding machine uses the Submerged Arc Welding (SAW) process to weld the edges of the steel plates together. The welding electrode, along with the granular flux, creates a continuous and secure weld along the joint.

4. Weld Inspection: After pre-welding, the welds are inspected for quality to ensure there are no defects or irregularities.

5. Output: The pre-welded steel plates are then fed into the subsequent pipe forming process, where they are shaped into the desired pipe configuration. The edges of the plates are now securely joined, laying the foundation for the final welding process to create a seamless pipe.

In summary, the pre-welding machine in the LSAW pipe making production line is a critical component in preparing the steel plates for seamless pipe production. It performs edge preparation and uses the Submerged Arc Welding (SAW) process to securely join the edges of the plates before they undergo the final pipe forming and welding stages. The pre-welding process ensures high-quality welds and plays a significant role in producing seamless LSAW pipes used in various industries, including oil and gas, construction, and infrastructure.