Division of Labor Among Components in the Production Process of the Zhongtian 76 enlarge to 127 Used Pipe Mill

The Zhongtian 76 enlarge to 127 used pipe mill functions as a coordinated production line where each specialized component performs a critical, sequential task in transforming steel coil into finished welded pipe. Understanding the distinct role of each section is fundamental for efficient operation, maintenance, and troubleshooting of this refurbished system. The seamless collaboration between these parts enables the line to produce a versatile range of round (Φ38–127mm) and square (30x30–100x100mm) pipes within the specified thickness tolerances.

1. Material Handling and Feed Preparation Section:
This initial stage, comprising the manual double-head uncoiler and the horizontal (spiral) accumulator, is responsible for the controlled and uninterrupted supply of raw material. The manual double-head uncoiler securely holds the steel coil and pays off the strip steel. Its dual-head design allows for preparing the next coil while the current one is in use, thereby reducing potential downtime during changeovers. The subsequent horizontal accumulator acts as an essential buffer. It stores a considerable length of strip in a looping pattern, mechanically decoupling the uncoiling process from the main forming section. This allows the uncoiler to pause for threading or coil changes while the continuous demand for strip from the high-speed forming mill is met from the accumulated reserve. This separation is vital for achieving non-stop production runs.

2. Primary Forming and Welding Core Section:
This is the transformative heart of the used pipe mill. The forming machine, with its configuration of 7 horizontal and 8 vertical roll stands (featuring 80mm and 50mm shafts respectively), executes the precise, multi-stage shaping of the flat strip. Each stand progressively bends the strip until its edges are formed into a perfect cylinder and brought together tightly at the welding point. Following this, the 300kW solid-state high-frequency welder performs the crucial metallurgical joining operation. It applies intense, localized heat via high-frequency current to the prepared seam edges, fusing them together under pressure to create a strong, continuous longitudinal weld. The quality and stability of this component directly define the structural integrity of the final pipe.

3. Sizing, Cooling, and Discharge Section:
After welding, the closed but still malleable pipe enters the sizing machine. This unit, with 5 horizontal and 5 vertical stands, performs precision cold-forming. Its role is to calibrate the welded pipe to its exact final dimensions (e.g., diameter for round pipes, perpendicularity and dimensions for square pipes) and to improve its mechanical properties and surface finish. The pipe then travels onto the 12-meter run-out table. This section serves a dual purpose: it provides a stable conveying platform and allows the pipe to cool and solidify uniformly after the heat-intensive welding and sizing processes. The adequate length is crucial for handling the specified larger pipe sizes (up to Φ127mm round) before the pipe reaches the cutting station (implied but not listed) for final length cutting.

In summary, the Zhongtian used pipe mill operates as an integrated system where logistics, transformation, and finishing are distinctly handled by dedicated sections. The uncoiler and accumulator manage material flow, the forming section and high-power welder execute the core shaping and bonding, and the sizing stand with the extended run-out table ensures dimensional accuracy and prepares the product for final processing. The effective synchronization of these specialized parts enables this refurbished production line to reliably manufacture a broad spectrum of tubular products.

For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com.