Operational Considerations for the Japanese-Made 25 Used Tube Mill in Production

Safe and efficient operation of the Japanese-made 25 used tube mill requires strict adherence to precision-oriented procedures, given its design for manufacturing small-diameter, thin-walled tubing (round: Φ9.53–25mm, square: 13x13–20x14mm, thickness: 0.3–1.2mm). A disciplined approach focusing on meticulous setup, real-time monitoring, and stringent safety is critical to maintain product quality, maximize output, and protect this precision used equipment.

1. Pre-Operational Inspection and Precision Setup:
Before initiating any production run, a thorough and detailed inspection of this used tube mill is mandatory. Verify the smooth, tension-controlled operation of the head uncoiler and accumulator. Conduct a meticulous examination of all forming (8 horizontal, 7 vertical) and sizing (4 horizontal, 4 vertical) roll stands. Inspect the condition of the roll shafts (40mm horizontal, 20mm vertical) and the specific installed molds (e.g., for Φ12.7mm, 16x16mm, or 18x8mm flat oval) for any signs of wear, scoring, or minor damage, as even slight imperfections can significantly affect the profile and surface finish of such small, thin-walled tubes. Ensure the press roller is correctly aligned. Check the solid-state high-frequency welder's contacts, cooling system, and electrical connections. Perform a no-load test of all drives and the cold saw to detect any unusual vibrations or noises. Precisely align all components according to the specified right-hand feed direction.

2. Operational Monitoring and Process Control for Thin-Walled Tubing:
During production, constant and careful monitoring is essential due to the delicate nature of the material. Monitor the uncoiler and accumulator to maintain perfectly consistent strip tension, preventing breakage or deformation of the thin strip. Observe the multi-stage forming process closely; the strip must transition smoothly through each stand without any edge wrinkling or misalignment, which is paramount for proper seam preparation. The high-frequency welding process for thin walls (0.3-1.2mm) demands extreme attention. Monitor for a very stable, consistent, and narrow weld bead. Any fluctuation in the spark, weld appearance, or an audible change may indicate issues requiring immediate, fine adjustment to prevent burn-through or weak welds. Regularly sample and meticulously measure finished tubes from the run-out table using precision instruments to verify outside diameter, wall thickness, and shape conformity against tight tolerances, ensuring the sizing section is perfectly calibrated.

3. Safety Protocols and Precision Maintenance Routines:
Safety is paramount when operating any industrial machinery. Ensure all personnel wear necessary PPE, including safety glasses for flying debris, hearing protection, and cut-resistant gloves. Strictly enforce Lockout-Tagout (LOTO) procedures during all mold changes, clearing of jams (a risk with thin material), or maintenance inside the mill. Be acutely aware of hazards from the HF welder, rotating shafts, and the cold saw. After production, follow a structured shutdown sequence. Power down systems, carefully clean all debris from the rolls and guides, and apply appropriate protection to precision surfaces. For a used tube mill of this precision, maintaining a detailed logbook for operational parameters, material batches, quality measurements, and any minor irregularities is indispensable for tracking performance trends and planning preventative maintenance, which is key to preserving its accuracy and longevity.

In conclusion, successful operation hinges on rigorous pre-start checks, hyper-attentive process monitoring due to thin-gauge material, and an uncompromising commitment to safety and precision maintenance. These disciplined practices are essential to ensure product consistency, minimize scrap rates, and protect the long-term functionality and value of this specialized production asset.

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