Fixture for precision turning of a lateral surface
AssigneeKummer Freres S.A., Fabrique de machines
InventorHans-Jurgen Leiber
Life of this patent
Estimating the term…
Abstract
For high-precision material-removing machining of the lateral surface of a workpiece (1) rotating with the main spindle (3) of a turning lathe, a cutting tool (17) is fixed on a slide (14) which carries out an axial movement synchronized with the rotation of the main spindle by means of a cam assembly (18, 21, 20) control. The shaft (21) of the cam assembly is rotation-tightly coupled to the main spindle by electric means (8, 10).
Claims9
A device for high precision machining of circular surfaces on a workpiece rotatively driven in a lathe, comprising
- a spindle having an axis and means for holding said workpiece secured to said spindle and for driving it in rotation about said axis;
- a cross-slide mounted at a front end of said spindle;
- and
- a tool fixture on said cross-slide, said tool fixture comprising:
- a slide having a forward end and a rear end, and guiding means for guiding said slide in a direction parallel to said axis,
- a tool carrier secured to said forward end,
- a secondary shaft borne by said tool fixture and extending perpendicularly to said axis at said rear end, and
- a radial cam secured to said secondary shaft, and a reciprocating means for providing a reciprocating movement of said slide in said fixture in response to a rotating movement of said cam,
- wherein electrical coupling means are provided for coupling rotation of said secondary shaft and said spindle when the tool carrier is positioned in a machining position with respect to the workpiece.
A fixture for attachment to the cross-slide of a turning lathe for the purpose of high-precision material detaching machining of a lateral surface and of a contiguous shoulder having a specfic course of curvature on a workpiece borne by the main spindle of the lathe, comprising:
- a base body,
- a shaft rotatingly mounted in said base body,
- a radial cam borne by said shaft for determining said course of curvature,
- a slide movable axially in said base body and having one end projecting from said base body,
- a tool carrier secured to said one end of said slide,
- a feeler roll affixed to the other end of said slide,
- pressing means holding said slide in contact with said radial cam via said feeler roll,
- rotary drive means fixed to said shaft, and
- control means comprising a first arrangement associated with said main spindle, a second arrangement associated with said rotary drive means and an electrical connection between said arrangements, said control means synchronizing the speed of rotation of said radial cam with the speed of rotation of said main spindle during machining of the workpiece.
Dependencies are inferred from the claim text.