Method for facing surfaces of workpieces

Patent metadata

Field	Value
Publication number	US-9597741-B2
Application number	US-201314438973-A
Country	US
Kind code	B2
Filing date	Oct 15, 2013
Priority date	Oct 29, 2012
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A method and a device for facing surfaces of workpieces, in particular made of light metal alloys, in which a cutting tool is moved in a feed direction relative to the surface and removes material at a defined thickness by cutting, wherein the cutting tool is moved in a defined feed direction with one or more cutter bars oriented substantially parallel to the surface. The cutter bars are always set at an angle of <90° but >0° with respect to the feed direction. In this way, surfaces with high surface quality can be produced, in particular for workpieces made of light metal, with cost-effective machining parameters.

First claim

What is claimed is:

1. A method for facing a surface of a workpiece made of a light metal alloy, comprising:
providing a cutting tool having one or more cutter bars having a length of 0 to 200 mm oriented substantially parallel to the surface of the workpiece, wherein the one or more cutter bars are adjusted at an angle >0° and <90° with respect to a defined feed direction;
providing cooling channels for supplying to the cutter bars a minimum quantity lubrication (MQL) medium, coolant or an emulsion;
moving the cutting tool relative to the surface in the defined feed direction, while moving the cutting tool relative to the surface in the defined feed direction, pivoting the one or more cutter bars about a pivot point of the cutting tool, wherein the pivot point is located at a center of the one or more cutter bars substantially in a central axis of a clamping device; and
removing material with a defined thickness.

2. The method of claim 1 , further comprising continuously or temporarily changing the angle of the one or more cutter bars with respect to the defined feed direction when facing the surface.

3. The method of claim 1 , wherein the angle is adjusted between 75° and 30°.

4. The method of claim 1 , wherein the pivot point is oriented toward one of two end faces of the one or more cutter bars.

5. The method of claim 1 , wherein the pivot point is located between the two end faces and a center of the one or more cutter bars.

6. The method of claim 1 , wherein the defined feed direction of the cutting tool is controlled so as to be linear, circular, elliptical or non-linear, or a combination thereof.

7. The method of claim 1 , further comprising:
generating a force transversely to the defined feed direction, and
pressing the cutting tool against the surface of the workpiece with the generated force.

8. An apparatus disposed on a machine tool for facing a surface of a workpiece made of a light metal alloy, comprising:
a cutting tool comprising a support body, a clamping device, at least one substantially linear cutter bar having a length of 0 to 200 mm attached to the clamping device, and cooling channels for supplying to the cutter bar a minimum quantity lubrication (MQL) medium, coolant or an emulsion, means for moving the cutting tool relative to the surface in the defined feed direction, while moving the cutting tool relative to the surface in the defined feed direction, and means for pivoting the one or more cutter bars about a pivot point of the cutting tool, wherein the pivot point is located at a center of the one or more cutter bars substantially in a central axis of a clamping device and removing material with a defined thickness,
wherein the clamping device is constructed to be driven in a defined feed direction and with a rotary motion,
wherein the at least one cutter bar of the cutting tool is oriented substantially parallel to the surface and moved at an angle >0° and <90° with respect to the defined feed direction.

9. The apparatus of claim 8 , wherein the clamping device is constructed to be driven with a translational motion.

10. The apparatus of claim 8 , wherein the cutting tool comprises a plurality of staggered cutter bars which are affixed at separate tensioning rails and are height-adjustable.

11. The apparatus of claim 8 , further comprising at least one collection channel for chips generated during machining, with the at least one collection channel disposed in the cutting tool upstream of the at least one cutter bar.

12. The apparatus of claim 11 , wherein the cutting tool comprises flushing channels for removing cutting chips from the at least one collection channel after facing the surface.

Assignees

• Audi Ag

Inventors

• Kopton Peter

Classifications

• B23D5/00 Primary

  Planing or slotting machines cutting otherwise than by relative movement of the tool and workpiece in a straight line · CPC title

• B23B29/24

  Tool holders for a plurality of cutting tools, e.g. turrets {(indexing devices B23Q16/00)} · CPC title

• B23D1/00

  Planing or slotting machines cutting by relative movement of the tool and workpiece in a horizontal straight line only · CPC title

• Y10T409/50082

  Process · CPC title

• B23B27/14

  Cutting tools of which the bits or tips {or cutting inserts} are of special material · CPC title