Tool Head

Abstract

A tool head includes a first tool and a second tool disposed circumferentially on the tool head where the tool head has a rotation axis. The first tool of the tool head is an adjustable tool that is axially movable such that an axial position, relative to the second tool of the tool head, is settable.

Claims

1. A tool head, comprising: a first tool and a second tool disposed circumferentially on the tool head, wherein the tool head has a rotation axis; wherein the first tool is an adjustable tool that is axially movable such that an axial position, relative to the second tool, is settable.

2. The tool head as claimed in claim 1, wherein the adjustable tool is disposed with play, or has an adjustment distance, in an axial direction.

3. The tool head as claimed in claim 1, wherein: the adjustable tool is a roughening tool; the second tool is a forming tool; and the roughening tool follows the forming tool along a direction of advance.

4. The tool head as claimed in claim 1, wherein the first tool and the second tool each have a respective engagement region and wherein the respective engagement region is cylindrical.

5. The tool head as claimed in claim 1, wherein the first tool and the second tool each have a respective cylindrical basic body.

6. The tool head as claimed in claim 4, wherein the respective engagement regions each form a respective effective diameter and wherein the effective diameter of the first tool projects over the effective diameter of the second tool.

7. The tool head as claimed in claim 1, wherein the second tool is radially displaceable.

8. The tool head as claimed in claim 4, wherein the engagement region of the first tool is diamond-coated.

9. The tool head as claimed in claim 4, wherein an axial movement capability and/or a length of the respective engagement regions are/is dimensioned such that the respective engagement regions overlap, or do not overlap, in an end position.

10. The tool head as claimed in claim 1 further comprising a drive unit, wherein the first tool and/or the second tool is drivable by the drive unit.

11. A method for machining an inner surface of a cylinder, comprising the acts of: providing a tool head that has a rotation axis and a plurality of circumferentially disposed tools; inserting the tool head into a cylinder for a purpose of machining a cylinder wall; and altering an axial position of at least one tool of the plurality of circumferentially disposed tools relative to another tool of the plurality of circumferentially disposed tools for a purpose of setting a machining sequence.

12. The method as claimed in claim 11, further comprising the act of: changing the machining sequence for a purpose of withdrawing the tool head from the cylinder.

13. The method as claimed in claim 11, wherein a first tool of the plurality of circumferentially disposed tools is a roughening tool and a second tool of the plurality of circumferentially disposed tools is a forming tool; and further comprising the act of: arranging the roughening tool entirely or at least partly behind the forming tool with respect to a direction of advance.

14. The method as claimed in claim 11, further comprising the acts of: machining the cylinder wall for a purpose of applying a surface structure; and coating the cylinder wall following the machining by the tool head.

15. A use of the tool head as claimed in claim 1 to produce an internal combustion engine.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG. 1 is a partial top view of a tool head, as viewed along a rotation axis, and a detail view to illustrate the differing effective diameters of the tools; and

[0045] FIG. 2 is a schematic sectional representation of a tool head, to illustrate the functionality of the adjustable tool.

DETAILED DESCRIPTION OF THE DRAWINGS

[0046] Shown in FIG. 1, in the left half of the figure, as viewed along a rotation axis R, is a tool head 10 having a multiplicity of circumferentially arranged first and second tools 20 and 22, respectively, wherein a roughening tool 24 and a forming tool 22 are shown alternately in each case. A cylinder wall 50, which is machined by means of the tool head 10, is represented by a broken line. Shown in outline in the right half of the figure are a roughening tool 24 and a forming tool 22, with their respective engagement regions 23 and 25, respectively, wherein it is evident that the engagement region 25 of the roughening tool 24 projects over the engagement region 23 of the forming tool 22 by a radial offset d. In other words, an effective diameter D24 of the roughening tool 24 is greater than an effective diameter D22 of the forming tool 22. Typical values in this case are in a range of from approximately 0.01 to 1 mm. To aid orientation, the course of the rotation axis is again indicated by the reference R.

[0047] FIG. 2, in its left figure half, then shows half of a tool head 10, comprising an upper and a lower base plate 13, between which a cylindrical basic body 12 is arranged. A bearing portion, or bearing ring 14, which serves, inter alia, to support the tools 22, 24, is indicated by the reference 14. In principle, the configuration comprising the basic body 12, or the base plates 13 and the bearing portion 14, is to be understood as being merely an example. The arrangement, or support, of the tools 22, 24 may be effected in many ways. In particular, the axial movement capability, or the axial play along the rotation axis R, may be achieved by various types of design. FIG. 2 serves, in particular, to illustrate the functioning of the first tool, or adjustable tool, in this case a roughening tool 24, in the right half of the figure. If the tool head is directed downward, along the direction of advance V1 (in the middle region of the figure), for example during the insertion of the tool head 10 into a cylinder, this results in the adjustable tool, in particular the roughening tool 24, moving backward in relation to the direction of advance V1, this resulting in an axial offset x. During withdrawal from the cylinder, shown in outline in the right half of the figure (cf. reference V2), a realignment of the adjustable tool, or of the roughening tool 24, is effected automatically (or as a result of the provision of an adjusting means), such that the latter tool (again) follows with respect to the forming tool 22. The axial position/location of the at least one second tool 22 is maintained in this case. Consequently, a forming operation is performed first, and then a roughening operation. The automatic orientation may be effected, in particular, by mounting of the corresponding tool basic bodies 26 with play. Advantageously, it can be ensured, at least in the case of this embodiment, that roughening of the cylinder wall is effected as a final machining step.

LIST OF REFERENCE CHARACTERS

[0048] 10 tool head [0049] 12 cylindrical basic body [0050] 13 base plate [0051] 14 bearing portion, bearing ring [0052] 20 first tool, adjustable tool [0053] 22 second tool, forming tool [0054] D22 effective diameter of forming tool [0055] 23 engagement region of forming tool [0056] 24 roughening tool [0057] D24 effective diameter of roughening tool [0058] 25 engagement region of roughening tool [0059] 26 tool body [0060] 50 cylinder wall [0061] d radial offset [0062] x axial offset [0063] V1, V2 direction of advance [0064] R rotation axis

[0065] The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.