Problem
A strip jam or hard spot sends a shock load through the forming stands, and without protection the rollers, shafts and bearings absorb it, causing expensive damage and long downtime.
Cause
Unexpected overloads such as strip overlaps, hard inclusions or mis-fed strip exceed the design load, and rigid stands pass that shock straight into the tooling and gearbox.
Solution
The ZY16 forming stands include overload protection that releases at a set force, so a jam trips the protection instead of bending rollers or shafts. Operators can reset and restart quickly, protecting the 42CrMo shafts and double-radius rollers and cutting repair downtime and spare parts cost.
Key Engineering Data
- Overload trip releases at a preset force during jams.
- Protects double-radius rollers and 42CrMo shafts from damage.
- Fast reset and restart cut downtime after a jam.
- Adjustable trip setting matched to production loads.
| Parameter | Specification |
|---|
| Mill Model | ZY16 |
| Tube OD Range | Φ8-18 mm |
| Wall Thickness | 0.4-1.0 mm |
| Strip Width Range | 25-57 mm |
| Max Line Speed | 90 m/min |
| HF Welder Power | 100 kW Solid-State High Frequency |
| Strip Material | Hot Rolled / Cold Rolled / Galvanized Steel |
| Uncoiler | Double-Mandrel Pneumatic, 1.5-Ton Coil Capacity |
| Accumulator | 200 m/min High-Speed Cage |
| Strip Leveling | Seven-Roller Leveling Unit |
| Forming Stands | 5-Stand Rough + 3-Stand Precision |
| Roller Geometry | Double-Radius Forming Rollers |
| Roller Shafts | 42CrMo High-Strength Alloy Steel |
| Safety | Forming Stand Overload Protection |
Performance & Quality
Overload protection releases at a preset force so a jam trips the stand instead of bending rollers or shafts. Operators reset and restart quickly, protecting the double-radius rollers and 42CrMo shafts and cutting the repair downtime and spare parts cost of jam-related damage. Because a single saved roller set or shaft can cost far more than the protection device itself, the feature pays for itself the first time it prevents a jam from wrecking the tooling.
Application
For Φ8-18mm tube production where protecting forming tooling from jam damage and minimizing downtime are priorities for cost control.
Selection Guide
Choose this mill when you value tooling protection and fast recovery from jams. Confirm your strip and operating conditions so the overload trip setting matches your production loads.
Application Scenarios
Thin-wall and galvanized tube prone to occasional jams, high-volume lines where downtime is costly, and operations with frequent size or coil changes.
FAQ
Q1. How does overload protection work?
It releases at a preset force so a jam trips the protection instead of bending rollers, shafts or the gearbox.
Q2. Does it reduce downtime?
Yes, operators reset the protection and restart quickly instead of replacing damaged rollers or shafts.
Q3. Is it adjustable?
Yes, the trip setting is matched to your strip and production loads during commissioning.
Q4. What triggers an overload?
Strip overlaps, hard inclusions or mis-fed strip that exceed the design load, which are common on thin-wall and coated material.
Q5. Does overload protection reduce damage costs?
Yes, it prevents shock loads from reaching the rollers, shafts and gearbox, so a jam becomes a quick reset rather than an expensive repair.
Q6. Does overload protection need resetting often?
It trips only on genuine overloads such as jams; normal running does not trigger it, and reset is quick and tool-free.
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