Adjustment device for a fine machining tool

• US 20040191022A1
• Filed: 10/29/2003
• Published: 09/30/2004
• Est. Priority Date: 10/29/2002
• Status: Active Grant

• Current Assignee: Jorg Guhring
• Original Assignee: Dr JORG Guhring
• Inventors: Broghammer, Hans-Peter, Ehrler, Rolf
• Granted Patent: US 7,140,819 B2
• Time in Patent Office: Days
• US Class Current: 409/234
• CPC Class Codes: B23B 2270/025 Hydraulics
• CPC Class Codes: B23B 2270/24 Tool, chuck or other device activated by the coolant or lubrication system of the machine tool
• CPC Class Codes: B23B 29/03421 by pivoting the tool carriers or by elastic deformation
• CPC Class Codes: B23B 29/03457 by pivoting the tool carriers or by elastic deformation
• CPC Class Codes: B23B 31/305 the gripping means is a deformable sleeve
• CPC Class Codes: B23D 2277/085 comprising hydraulics
• CPC Class Codes: B23D 77/04 with cutting edges adjustable to different diameters along the whole cutting length
• CPC Class Codes: Y10T 279/1029 Jaw is expansible chamber; i.e., bladder type
• CPC Class Codes: Y10T 279/1216 Jaw is expansible chamber; i.e., bladder type
• CPC Class Codes: Y10T 279/1233 Jaws mounted on flexible member; i.e., diaphragm
• CPC Class Codes: Y10T 279/29 More than one set of gripping means
• CPC Class Codes: Y10T 408/62 Coaxial
• CPC Class Codes: Y10T 408/85 to move radially
• CPC Class Codes: Y10T 408/85843 Resilient Tool or tool-support
• CPC Class Codes: Y10T 408/8595 Pivotable tool-support
• CPC Class Codes: Y10T 409/309408 with cutter holder
• CPC Class Codes: Y10T 409/30952 with cutter holder

Abstract

An adjustment device for adjusting the position of at least one cutter of a fine machining tool, particularly a reamer, with respect to a cutter support (ST) is described. To allow the cutter to be adjusted as precisely as possible, the cutter support (ST) borders at least one pressure chamber (DK) which is arranged in the adjustment direction of the cutter (S) with a displacement with respect to it and which is filled with a pressure means which can be placed under pressure using a pressure generation device. Between the cutter (S) and the pressure chamber (DK), a cutter support wall (W) remains which is elastically deformable upon application of pressure by the pressure transfer means to adjust the cutter position.

Claims

1. An adjustment device for adjusting the position of at least one cutter of a fine machining tool with respect to a cutter support, the adjustment device comprising:

the cutter support borders at least one pressure chamber which is arranged in the adjustment direction of the cutter with a displacement with respect to the cutter and which is filled with a pressure means which can be placed under pressure with a pressure generation device, wherein

between the cutter and the pressure chamber a cutter support wall remains which is elastically deformable upon application of pressure by the pressure transfer means to adjust the cutter position.

2. The adjustment device according to claim 1, wherein the cutter and the pressure chamber are arranged in alignment in the adjustment direction.

3. The adjustment device according to claim 1, wherein the length (LD) of the pressure chamber in the orthogonal direction to the adjustment direction corresponds essentially to the length (LS) of the cutter.

4. The adjustment device according to claim 1, wherein the length of the pressure chamber in the orthogonal direction to the adjustment direction is limited to the region of the tool corner.

5. The adjustment device according to claim 1, wherein the elastic deformation between the pressure chamber and the cutter lies in the size range of the cutter adjustment.

6. The adjustment device according to claim 1, wherein the pressure transfer means is an at least approximately incompressible fluid.

7. The adjustment device according to claim 1, wherein the pressure transfer means is a plastic bush which is in the pressure chamber.

8. The adjustment device according to claim 1, wherein the pressure generation device includes a screw which can be screwed into a blind threaded hole.

9. The adjustment device according to claim 8, wherein the blind threaded hole is separated by an axial distance from the pressure chamber and is connected to it via connecting channels.

10. The adjustment device according to claim 8, comprising a characteristic diagram which provides a predetermined relationship between an input quantity of the pressure generation device and the resulting positional adjustment of the cutter.

11. The adjustment device according to claim 1, wherein the position of the cutter is adjustable in the radial direction.

12. The adjustment device according to claim 1, wherein the pressure chamber is formed with a ring shape.

13. The adjustment device according to 1, wherein the extension of the pressure chamber is limited in the circumferential direction locally to the region of the cutter.

14. The adjustment device according to one of the claims 1, wherein the cutter support is a tool mounting basic element.

15. The adjustment device according to one of the claims 1, wherein the cutter support is a ring which can be slid onto a tool mounting basic element, particularly a tool clamping mandrel or a clamping mandrel/clamping chuck combination.

16. The adjustment device according to claim 15, wherein an attachment of the cutter support ring on the basic element is provided, particularly by means of solder accommodated in circumferential grooves.

17. The adjustment device according to claim 15, wherein the pressure chamber is molded entirely into the cutter support ring, the pressure chamber being fillable via connecting channels with the pressure transfer means.

18. The adjustment device according to claim 15, wherein the pressure chamber is bounded by basic element and cutter support ring applied thereupon and a gap between basic element and slid-on cutter support ring is sealed against leakage of the pressure transfer means.

19. An adjustment device according to claim 14, wherein the tool mounting basic element has an additional central tool holder with an assigned expansion chuck.

20. The adjustment device according to claim 19, wherein the pressure chamber of the adjustment device serves at the same time as a pressure chamber of the expansion chuck.

21. The adjustment device according to claim 19, characterized in that the adjustment device and the expansion chuck have separate pressure chambers which have a pressure coupling.

22. The adjustment device according to claim 19, wherein the adjustment device and the expansion chuck have separate pressure chambers which can be placed under pressure independently of one another.

23. A fine machining tool comprising an adjustment device according to claim 1.