| 摘要 |
A surface grinding machine (10) capable of being computer operated and having a multi-function capability for performing conventional slot and surface, plunge, side wheel, creep feed and short stroke grinding in any desired combination or sequence. A table (18) containing a workpiece (90) is driven by a highly tensioned, circulating primary belt drive system (50) capable of providing a desired grind with a desired length and speed upon command. The base (12) is formed as a unitary body, and the table (18) travels on ways (20) which are formed integrally with the base (12). The column (14) containing the grinding wheel (40) moves with respect to the workpiece (90) along cross ways (16) transverse to the table ways (20) which are supported along their length by the base (12). The column drive (100) is coupled to the column (14) by a mechanically and thermally isolated bail screw nut mount (118, 120, 122 and 124) which eliminates screw nut shoulder weave and reduces thermal conduction into the column (14). A housing (22) containing the grinding wheel (40) assembly moves vertically along ways (24) in the column (14) and a magnetic brake (156) is utilized in the vertical drive (154) for the wheel housing (22) to prevent damage to the workpiece (90) during power interruption. Both the vertical ways (24) for the wheel housing (22) and the horizontal cross ways (16) for the column (14) are self-aligning and include a shoe (240 and 184) and a cage (224 and 186) containing needle roller bearings (226 and 206) which is driven by a rack and pinion arrangement (228, 230, 232, 188, 190 and 192) along the ways (24 and 16). A computer terminal (26 and 258) may be provided for automatic control of the machine, and a manual control panel (28) may also be provided, which is slidable across the front of the machine (10) for convenience of operation thereof. |
