Device for surface machining of workpieces
AssigneeMaschinenbau Grieshaber GmbH & Co.
InventorsRichard Humpert, Wolfgang Winkelmann
Life of this patent
Estimating the term…
Abstract
A device and process for the surface machining of workpieces with convex surfaces, the device including an abrasive belt, abrasive belt clamping devices, an abrasive belt tensioning device, and clamping tongs device with two clamping arms, one of which is rotatable relative to the other. A section of unused abrasive belt is drawn from a supply roll for the abrasive belt and a corresponding section of used abrasive belt is wound onto a wind-up roll for the abrasive belt so that machining proceeds with a new section of abrasive belt.
Claims14
A device for the surface machining of workpieces with convex surfaces, comprising:
- an abrasive belt which defines a feeding direction from a supply roll to a wind-up roll;
- a clamping tongs device having two clamping arms, with at least one of said clamping arms being mounted to be rotatable relative to said other clamping arm, and with at least one of said clamping arms having a clamping block at one end thereof for engaging said abrasive belt and applying said abrasive belt to the surface of the workpiece to be machined;
- an abrasive belt feeding device including two abrasive belt clamping devices, each located adjacent a respective one of said clamping arms, and with one of said abrasive belt clamping devices also located in the feeding direction of said abrasive belt;
- and
- a belt tensioning device located between said abrasive belt clamping devices, which engages and applies tension to said abrasive belt;
- wherein a section of unused abrasive belt is drawn from a supply roll under the influence of said belt tensioning device when said abrasive belt clamping device located in the feeding direction of said abrasive belt releases said abrasive belt, and wherein said abrasive belt pretensions said belt tensioning device when said abrasive belt clamping device located in the feeding direction of said abrasive belt and adjacent the supply roll is closed and said abrasive belt is released by the other of said abrasive belt clamping device located adjacent the wind-up roll.
A process for the surface machining of workpieces with convex surfaces by means of an abrasive belt and a front and rear abrasive belt clamp, the abrasive belt moving from a supply roll to a wind-up roll, comprising the steps of:
- bringing the abrasive belt into contact with the convex surface of the workpiece by activating the front and rear abrasive belt clamps;
- pressing the abrasive belt against the contacted convex surface for machining;
- reducing the pressing force, releasing the rear abrasive belt clamp, drawing an unused section of abrasive belt from the supply roll, and activating the rear abrasive belt clamp;
- and
- releasing the front abrasive belt clamp, winding-up a corresponding section of used abrasive belt onto the wind-up roll, tautening the abrasive belt between the abrasive belt clamps, activating the front abrasive belt clamp, and pressing the abrasive belt once again against the contacted convex surface of the workpiece for machining.
Dependencies are inferred from the claim text.