Universal grinding machine
AssigneeEwag A.G., Maschinen - und Werkzeugfabrik
InventorPeter Herzig
Life of this patent
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Abstract
During grinding, a grinding wheel effects movements of solely vertical displacement along a path parallel to a vertical guide rod. The workpiece to be machined is held by a rotatable, but not axially displaceable, chuck secured to a workpiece head. In order that helical relative movements between the workpiece and the grinding wheel may be produced, transmission components and gearing are provided for positively converting the vertical motion of the grinding wheel into rotary motion of the workpiece. For cylindrical and surface grinding, the motion-conversion arrangement may easily be disengaged or dismantled. Thus it is possible with this universal grinding machine to carry out drill grinding, cylindrical grinding, and/or surface grinding on a workpiece which need be chucked only once.
Claims4
A universal grinding machine comprising:
- a workpiece holding means including a workpiece head provided with a rotatable chuck,
- a grinding-wheel spindle having a grinding wheel secured thereto,
- a vertically displaceable grinding-wheel spindle holder,
- guide means associated with said grinding-wheel spindle holder, and
- motion-conversion means associated with said grinding-wheel spindle holder and with said chuck, said grinding-wheel spindle holder being disposed for solely vertical displacement along said guide means, and said motion-conversion means being arranged to effect positive conversion of vertical displacement motion of said grinding-wheel spindle holder into rotary motion of said chuck, wherein said motion-conversion means comprise
- a planetary gear housed within said workpiece head and including a gear rim,
- a rack meshing with said gear rim,
- a vertically displaceable sine bar,
- a roller secured to said rack and engaging said sine bar,
- means for vertical guidance of said sine bar, and
- a rod detachably connected at one end to said sine bar and at the other end of said grinding-wheel spindle holder, whereby said vertical displacement motion of said grinding-wheel spindle holder is transmitted to said sine bar.
Dependencies are inferred from the claim text.