Solid measuring rolls for every application
The Stressometer family of solid flatness measuring rolls for cold rolling mills has three members. Together these rolls cover all needs of flatness measurement regardless of the application and metal type being rolled.
Choose your measuring roll
Standard roll
<p>The well-proven standard roll uses 26 or 52 mm wide transducers for measuring flatness. The transducers are protected by shrink-on rings. Roll diameter, ring material, surface material and surface hardness are adapted to demands of each specific application.</p>Seamless roll
<p>The seamless roll is used where quality of the strip surface is of particular importance. The roll has a completely seamless surface there is nothing that can mark the strip.</p>Low-Force roll
<p>The Low-Force roll has a Pressductor transducer with a somewhat different design compared to the standard transducer. While sharing long-term stability e.g. no sensitivity drift and other important Pressductor characteristics with the standard transducer, the low-force transducer has a better signal to noise ratio.</p>Roll Data
| Features | Standard Roll / Seamless Roll |
Low-Force Roll |
|---|---|---|
| Sensor type | Standard sensor | Low-force sensor |
| Roll life cycle | More than 20 years | More than 20 years |
| Strip thickness range | 0.1 to 10 mm or 0.02 to 2 mm ¹ |
0.005 to 0.5 mm |
| Typical accuracy (installation dependent) |
0.5 I-units |
0.5 I-units |
| Parallel resolution |
26 and/or 52 mm |
26 and/or 52 mm |
| Measurement zone width | 26 and/or 52 mm |
26 and/or 52 mm |
| Minimum edge zone coverage for measurement |
1 mm |
1 mm |
| Measurement range, tension/zone | 125 to 175,000 N 40 to 35,000 N ¹ |
3 to 6,000 N |
| Maximum mechanical load, without need for recalibration of the roll |
350,000 N 70,000 N ¹ |
12,000 N |
| Dynamically measurable force change per zone |
0.7 to 1 N ³ 0.3 to 0.5 N ¹ |
0.02 to 0.03 N ³ |
| Maximum measurement density (number of measurement points/meter strip) |
320 ⁴ | 500 ⁴ |
| Maximum strip temperature | 240°C ⁵ | 180°C ⁵ |
| Minimum wrap angle | 4 degrees | 10 degrees |
| Roll diameter | 313, 400 mm | 200 mm |
1) Semi-foil roll design.
2) Resolution with max. 2 x 12.5% force spreading to adjacent measurement zones.
3) Wrap angle dependent.
4) 4 measurement points per zone and roll revolution.
5) Without airknives or other cooling systems. Several installations in aluminium hot rolling mills.
ABB has developed a series of different types of roll surfaces meeting most requirements
| Type of roll surface | Hardens Steel | High Speed Steel (HSS) | Seamless roll coating |
| Surface hardness (±2 HRC) | 54 HRC | 61 HRC | 66 - 70 HRC ⁷ |
| Surface life cycle | >20 years ⁶ | >25 years ⁶ | >10 years ⁶ |
| Regrinding | >2 years ⁶ | >3 years ⁶ | >3 years polishing ⁶ >10 years recoating ⁶ |
| Coatings | Standard Roll Lowforce Roll |
Standard Roll | Seamless Roll |
6) Depending on application.
7) Depending on coating composition.