Quick-Change System for Forming & Sizing Section

2. Structure and Technical Scheme

1) Cassette-Type Base:
Roll stands in the forming and sizing sections are mounted on a unified steel base, which can be moved along rails for offline changeover or maintenance.

2) Offline Pre-assembled Modules:
A complete set of roll stands, rolls, and shaft systems is prepared offline in advance. During changeover, the entire cassette is brought onto the line, significantly reducing preparation and downtime.

3) Pneumatically Released Couplings:
Transmission shafts and roll stands are connected via pneumatic couplings, which can be engaged/disengaged in seconds without manual intervention. Common types include quick-insert spline shafts, pneumatic expanding sleeves, and self-aligning locking couplings.

4) Positioning & Locking System:
Each roll stand is equipped with mechanical limiters or hydraulic positioning pins for precise placement. Optional auto-locking mechanisms further reduce setup time.

3. Technical Advantages

4. Application Scope

• High-end structural tube production (HSS, construction, bridges)

• Automotive tube lines (bumpers, chassis)

• Export-oriented tube mills with frequent order changes

• Furniture tubing and customized rectangular profiles

5. FAQ – Frequently Asked Questions

Q1: Does each pre-assembled cassette include shafts?
A: Yes. Each quick-change module includes its own shaft system (main shaft, driven shaft, couplings) to avoid disassembling the mainline. Coupling is achieved via pneumatic quick connectors.

Q2: Are pneumatic couplings reliable and easy to maintain?
A: Yes. These couplings are made of high-strength alloy steel with sealed dustproof designs. Pneumatic components use standardized parts with low failure rates.

Q3: Can the system be integrated with PLC or HMI?
A: Advanced systems support PLC/HMI integration for changeover alerts, position feedback, and pneumatic control.

Q4: Is it suitable for both round and square tube production?
A: Absolutely. It's recommended to have separate cassettes for each section type (square, round) to maximize speed and accuracy.

6. Comparison: Quick-Change vs. Traditional Setup

Conclusion:

The quick-change system is highly recommended for production lines requiring frequent specification changes and high efficiency. It reduces downtime, improves operator safety, and ensures high product quality. For single-size or budget-constrained lines, the traditional setup remains viable but less efficient long-term.