Cylindrical Grinder Uses Streamlined Machine Design
Shigiya’s GPS-30B CNC cylindrical grinder offers an entry-level model with high-quality performance at an affordable price.
Shigiya’s GPS-30B CNC cylindrical grinder offers an entry-level model with high-quality performance at an affordable price. The machine is designed to reduce costs and increase affordability using a streamlined machine design with common parts.
The machine’s wheelhead and table head sliding surfaces feature wide V and flat slideways that provide sufficient rigidity and load capacity. The high damping performance and equalization of the lubrication oil, provided by the oil film’s squeezing effect, help the grinder maintain long-lasting precision and smooth operation. The wheel spindle oil is stored in an isolated tank to prevent thermal displacement caused by an increase in lubrication temperature. The wheel dressing device is mounted onto the lower table, eliminating the need to change dressing coordinates. Available options include a non-swivel wheelhead with a highly rigid main body and large diameter wheel spindle.
The grinder can change speed steplessly on the AC servomotor within a range of 15 to 600 rpm. Optimal rotational speed can be determined automatically with the interactive automatic programming system. To achieve high-precision heavy grinding, the manual tailstock is mounted with a large-diameter spindle that has been precisely processed.
The GPS-30 offers a 300-mm swing over table, a maximum grinding diameter of 300 mm and a 500- to 2000-mm distance between centers. Models with a center distance ranging to 750 mm are equipped with a compact workhead and tailstock units.
The interactive, conversational programming system requires little programming knowledge to operate, the company says. The system automatically sets up optimum grinding patterns and conditions after an operator enters numeric figures for three items. Data for as many as 47 workpieces can be stored with maximum steps.
Because creep-feed grinding is essentially a milling process, why not use a VMC? A grinding machine supplier describes how a VMC platform can make creep-feed grinding more effective.
Roughing and finishing on a single machine, using a single setup, has appeal for most shops. The advantages in time savings and accuracy are obvious. Eliminating the transport of workpieces between machines, as well as the setup for those secondary operations, is a boon for throughput. Critical features that need to maintain dimensional relationships can be much more reliably produced if machined complete in one clamping.
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.