Over time, the surface of rolls will wear down, causing performance and quality issues. Precision roll grinding works to reestablish the proper surface finish and roll profile.
What is grinding?
Precision Roll Grinding refers to the process of removing material and surface generation to shape and finish components made of metals and other materials. The surface finish achieved with grinding is ten times better than with traditional turning or milling techniques. Rolls are often ground to meet specified total indicated runout (TIR) tolerances.
Why is precision roll grinding important?
Imagine driving a car with an oddly shaped tire. You notice vibration and instability, right? That same concept applies to rolls – a roll with imperfections will have a profound effect on performance. Based on the type of roll, it’s crucial that rolls are ground to exact specifications. Grinding is necessary to bring rolls back to their proper shape and finish.
What rolls need precision grinding?
Rolls are widely-used in the production of materials such as steel, aluminum, brass, copper, textile and paper. Common roll materials include:
What are standard roll grinding tolerances?
- TIR: .001
- Straightness: .001
- Station Deviation: .001
- Station-to-Station Dev.: .001
- Concentricity: .001
- Surface Finish: 16 – 32 Ra
Roll Grinding Process & Services
The roll grinding process typically begins with a detailed inspection. This allows the operator to inspect the crown, concentricity and roundness of the roll. Equipment condition data and measurements are collected before the grinding process begins.The type of grinding necessary to restore the original properties and qualities are determined based on actual operating conditions and specific job requirements of the roll. Once the grinding technique is determined, the roll and equipment are prepped for grinding.There are four common many forms of industrial roll grinding:
- Cylindrical Grinding
- Internal Grinding
- Centerless Grinding
- Surface Grinding
Proper grinding will effectively remove oxidation, surface imperfections, cuts, cracks and other blemishes. Once tolerances are met, and the desire surface is achieved, the grinding process is complete. At Fertilla Machine and Grinding, we specialize in rolls. From custom roll covers to full-scope testing and analysis, we offer comprehensive services to ensure rolls are running at their fullest potential. Our precision roll grinding capabilities are designed to meet exact specifications and the tightest tolerances.