Guide bush
OwnerHarold Habeggerinventor
Life of this patent
Estimating the term…
Abstract
A guide bush is described, having a bush-holder and a quill integral with the bush support. The device has a clamp capable of rotating a workpiece, means for opening and closing the clamp and regulating means adapted to monitor the opening and closing means in order to compensate for changes in the dimensional tolerances of the workpiece, wherein the bush regulating means are adapted to operate the opening and closing means of the clamping means very quickly as a direct result of variations in the dimensional tolerances of the workpiece in order to provide a substantially constant pressure of the clamp on the workpiece. The bush is for use with a machine tool such as a travelling headstock automatic lathe.
Claims22
A guide bushing especially adapted for use with a machine tool, comprising:
- a bushing-holder and means for positioning said bushing-holder with respect to said machine tool;
- a quill engaged with the bushing-holder;
- clamping means for supporting and rotatably guiding a workpiece to be machined, said clamping means being in substantially fixed relation to the bushing-holder during normal working conditions of the guide bushing, said clamping means permitting said workpiece to move in translation along a translation advance direction;
- means for opening and closing the clamping means so as to adjust the clamping of the latter about the workpiece;
- and
- regulating means for controlling the operation of said opening and closing means in order to compensate for positive and negative radial dimensional variations in the workpiece;
- wherein said regulating means comprise sensor means mounted in continual sliding frictional contact with the workpiece for sensing said dimensional variations therein, said sensor means being responsive to the said dimensional variations, for causing a rotating oscillating movement of the quill, which in turn, controls the operation of the said opening and closing means.
Dependencies are inferred from the claim text.