Fine-Grinding Machines Achieve Precise Plane Parallelism
IMTS 2018: Supfina adds the Spiro F5 and Spiro F12 to its line of fine-grinding machines for the batch mode processing of a wide range of parts.
Supfina adds the Spiro F5 and Spiro F12 to its line of fine-grinding machines for batch processing of a wide range of parts. The machines are designed to achieve precise plane parallelism (≤1.0 micron) for precision bearings, pump gears and valve plates in a variety of materials. Parts can be machined up to 20 times faster than lapping and with more precision than double-disc grinding, according to the company.
The smaller F5 can process parts with diameters ranging from 4 to 150 mm and thicknesses ranging from 0.3 to 50 mm, while the larger F12 can accommodate parts with diameters ranging from 6 to 420 mm and thicknesses ranging from 1 to 100 mm.
The machines eliminate water from the cooling process, reducing chance of contamination. The sturdy base minimizes vibration, reducing tool wear. The upper wheel swings away from the work area, enabling fast loading and unloading of parts, quick tooling changes, and easy maintenance.
It sounds like a contradiction in terms-between centers and centerless grinding on one machine. But for some categories of workpieces, it's a viable production process that can yield machining time reductions of 45 percent over separate grinding operations.
No other process can do what creep-feed grinding can do. Recent tests show even more can be gained by optimizing every element of a creep-feed system.
The double-disc grinding process is consolidating its position in automotive applications but is moving into other industries. Double-disc grinders are now easier to operate, and they have added capabilities for control flexibility, precision process control, faster changeovers, and grinding of nontraditional materials.