METHOD FOR MACHINING A WORKPIECE BY MEANS OF A TOOL

Abstract

A method for machining a workpiece with at least one tool, wherein the workpiece and/or the tool are driven in rotation, wherein the tool has at least one cutting edge that is brought into cutting engagement with the workpiece, namely into a cutting position, in a cutting operation, and wherein, in the cutting operation, the workpiece or the tool is moved in a feed direction with a constant feed, and wherein, in a surface machining operation, the tool and thus the cutting edge remain in the cutting position and the workpiece or the tool is moved in the feed direction, shifted by half the feed.

Claims

1. A method for machining a workpiece with at least one tool, wherein the workpiece and/or the tool are driven in rotation, wherein the tool has at least one cutting edge that is brought into cutting engagement with the workpiece, namely into a cutting position, in a cutting operation, and wherein, in the cutting operation, the workpiece or the tool is moved in a feed direction with a constant feed, and wherein, in a surface machining operation, the tool and thus the cutting edge remains in the cutting position and the workpiece or the tool is moved in the feed direction, shifted by half the feed.

2. The method according to claim 1, wherein the workpiece is driven in rotation and the tool and thus the cutting edge is fed in radially with respect to the workpiece, namely in a direction normal to an axis of rotation of the workpiece, in the cutting operation and is thus brought into the cutting position, and wherein, in the cutting operation, the tool is moved in an axial feed direction, namely in a direction parallel to the axis of rotation of the workpiece, with a constant feed, and wherein, in the surface machining operation, the tool and thus the cutting edge remains in the radial cutting position and is moved in the axial feed direction, shifted by half the feed.

3. The method according to claim 1, wherein the workpiece is driven in rotation and the tool and thus the cutting edge is fed in axially with respect to the workpiece, namely in a direction parallel to an axis of rotation of the workpiece, in the cutting operation and is thus brought into the cutting position, and wherein, in the cutting operation, the tool is moved in a radial feed direction, namely a direction normal to the axis of rotation of the workpiece, with a constant feed, and wherein, in the surface machining operation, the tool and thus the cutting edge remains in the axial cutting position and is moved in the radial feed direction, shifted by half the feed.

Description

DRAWINGS

[0025] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0026] The invention is described in the following text by way of example with reference to the drawings.

[0027] FIG. 1 shows a schematic illustration of the surface of a workpiece after a cutting operation of longitudinal turning.

[0028] FIG. 2 shows a schematic illustration of the surface of a workpiece after a surface machining operation of longitudinal turning.

[0029] The method according to the invention is described in the following text by way of example on the basis of longitudinal turning of a workpiece. FIG. 1 and FIG. 2 schematically show, with regard thereto, respective surface structures of the workpiece after a cutting operation (FIG. 1) and after a surface machining operation (FIG. 2). The basic configuration of the surface structure after a cutting operation depends on process parameters such as a tool shape, a feed f, etc.

[0030] During longitudinal turning, the workpiece is driven in rotation about an axis of rotation 1 and the tool, which comprises a cutting edge, is fed in radially, namely normally to the axis of rotation 1, down to a cutting depth, i.e. brought into a cutting position. During turning, the tool is moved, in a cutting operation, with a constant feed movement parallel to the axis of rotation, namely a feed f, expressed in mm/revolution of the workpiece.

[0031] In the cutting operation, the tool is moved in an axial feed direction, namely a direction parallel to the axis of rotation 1 of the workpiece, with a constant feed “f”.

[0032] With a constant feed f, a surface structure illustrated in a greatly simplified manner as a “peak/valley” structure in FIG. 1 arises. The spacing of the “peaks” is constant in the direction of the axis of rotation 1 with a constant feed f. The “valley depth”, also known as roughness depth r, depends here on the design of the cutting edge of the tool and on the feed f.

[0033] In a surface machining operation following the cutting operation, the tool and thus the cutting edge remain in the radial cutting position and the tool is moved in the axial feed direction, shifted by half the feed f.

[0034] This results in a surface structure according to FIG. 2. The original “peaks” have been removed and this results in a surface structure with a reduced roughness depth “r”, with half the roughness depth r in the present highly simplified exemplary embodiment.