ASB Industries, Barberton, Ohio, has completed the upgrade of its Mesta Roll Grinder to provide extremely accurate two-axis grinding for complex roll crowns, as well as a wide range of other thermal spray surfacing options. The grinder was completely remanufactured from the ground up. Upgrades retain its original capacity and capabilities, with the benefit of numerous usability and performance improvements The machine is capable of processing workpieces up to 60 in. (1524 mm) in diameter and 288 in. (7315 mm) long.
A new Fagor 8065T CNC control system, specially designed for two-axis grinding operations, utilizes autotuning software that allows for fine-tuned grinding processes. The updated controls create more accurate finishes and are fully integrated to achieve two linear axes on both spindles for complex roll crown profiles. Roll profiles can be programmed via G-Code programming, CAD/CAM software, or Fagor’s onboard profile editor.
ASB also added a Renishaw touch probe for data collection purposes. All roll history data is documented during refurbishments and is transferable to Excel files for easy reference. Data and inspection reports are made available to ASB’s customers.
Additional upgrades include a new Dodge MagnaGear parallel shaft reducer gearbox unit, new bearings and belt drives, a Torit Mist Collector to minimize airborne grinding dust, and a Barnes Kleenall coolant cleaning unit and Rosedale secondary bag filter. Modifications to the grinding head will enable ASB to achieve near-theoretical grinding to center, improving the contact plane and the grinder’s versatility.
Alignment and levels of all of the Mesta grinder’s components were adjusted as needed and verified using a Hamar L-730 precision laser level. Lubrication lines and way covers were replaced, and custom wear guards were also installed.
