Abstract: Grinding machine (1) comprising a first wheelhead (4) for machining flat surfaces and a second wheelhead (10) for machining workpieces (3) such as broaches. The first wheelhead (4) is slidably mounted on a vertical column (6) and has a slide (7) on its underside. The second wheelhead (10) is rotatable about its own axis and is slidably mounted on said slide (7). When the first wheelhead (4) is in its working position, the second wheelhead (10) is placed away from the workpiece (3) on the slide (7) in its rest position (A), and, when the second wheelhead (10) is in its working position (B), said second wheelhead (10) is placed next to the workpiece (3), angularly oriented in order to carry out the helical machining.

Abstract: A grinding machine for grinding bulky workpieces of considerable length, such as frames, columns and tables of machine tools. Said grinding machine comprises at least one machining table on which a workpiece to be ground is placed, at least two columns linked to a single carriage, said carriage moving longitudinally over a base parallel to said machining table, and at least one wheelhead affixed to each of said columns, each one of said wheelheads comprising its own independently operated vertical and transverse drive means and at least one of said wheelheads being capable of angle movement. So, said wheelheads have a common longitudinal movement and independent vertical and transverse movements, so that said wheelheads can work simultaneously.

Abstract: Grinding machine (1) comprising a first wheelhead (4) for machining flat surfaces and a second wheelhead (10) for machining workpieces (3) such as broaches. The first wheelhead (4) is slidably mounted on a vertical column (6) and has a slide (7) on its underside. The second wheelhead (10) is rotatable about its own axis and is slidably mounted on said slide (7). When the first wheelhead (4) is in its working position, the second wheelhead (10) is placed away from the workpiece (3) on the slide (7) in its rest position (A), and, when the second wheelhead (10) is in its working position (B), said second wheelhead (10) is placed next to the workpiece (3), angularly oriented in order to carry out the helical machining.

Abstract: A grinding machine (1) that comprises two aligned columns (2,3), each of said columns (2,3) being provided with one wheelhead (4,5) with its respective grinding wheels (6,7). The columns (2,3) slide over a base (9) common to both and parallel to at least one machining table (11), each of the wheelheads (4,5) has its own vertical drive system and its own transverse drive system and both grinding wheels (6,7) may work simultaneously.