Apparatus for microfinishing
AssigneeSupfina Maschinenfabrik Hentzen KG
InventorHeinz G. Schmitz
Life of this patent
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Abstract
The invention relates to an apparatus for fine-working or microfinishing of workpiece surfaces, particularly rotationally-symmetrically moved workpieces with oscillating or rotating tools such as honing stones or fine polishing stones, which are in-fed against the workpiece. Dependent on a measured parameter proportional to the machining force, the tool infeed is controlled such that a continuous workpiece material remove with constant removal speed is achieved. The reaction force is measured at any point in the flux of force to determine the machining force.
Claims24
Apparatus for microfinishing the surface of a moving workpiece comprising:
- a frame, tool support means including a tool;
- means for enabling relative movement between the moving workpiece and the tool;
- and controllable infeeding device supported by the frame to continuously provide a variable machining force operating in a direction which is normal to the workpiece surface;
- a measuring device for measuring a parameter proportional to said machining force;
- and said infeeding device controlled by the measured parameter so as to move the tool toward and away from the workpiece surface to cause said measured parameter to vary between predetermined limits;
- wherein the parameter proportional to the machining force is a displacement parameter in the flux of force within the frame, the measuring device for measuring the parameter proportional to the machining force is an optical measuring element, and
- said workpiece is in the form of a cylinder having an axis and the means for enabling relative movement between workpiece and tool consists of two rollers turning in the same direction, whereby the workpiece is suspended centerlessly and is turned while the tool is moved through a swing movement in the direction of the workpiece axis by means of an excenter drive.
Apparatus for microfinishing the surface of a moving workpiece comprising:
- a frame, tool support means including a tool;
- means for enabling relative movement between the moving workpiece and the tool;
- a controllable infeeding device supported by the frame to continuously provide a variable machining force operating in a direction which is normal to the workpiece surface;
- a measuring device for measuring a parameter proportional to said machining force;
- and said infeeding device controlled by the measured parameter so as to move the tool toward and away from the workpiece surface to cause said measured parameter to vary between predetermined limits;
- the means enabling relative movement includes an electrical motor, the parameter proportional to the machining force is a changing electrical parameter in the current path of said electrical motor, and
- the said electrical parameter is detectable in the current path of the motor which forms part of the infeeding device and wherein the relative movement between the workpiece and the tool is in the form of an oscillating movement.
Microfinishing apparatus comprising:
- a machine body, a track carried by the machine body, the track supporting a sliding carriage which in turn supports an infeeding mechanism, said infeeding mechanism including a tool holder;
- a finishing tool attached to said tool holder;
- means for enabling relative movement between a workpiece and the finishing tool;
- the infeeding mechanism providing a machining force in a direction normal to a workpiece surface which is to be microfinished;
- means for continuously generating a signal proportional to said machining force;
- and
- means for adjusting the machining force operating in a normal direction between predetermined limits until the workpiece is microfinished.
Dependencies are inferred from the claim text.