PRESSURE SHOE

Abstract

The present invention relates to a pressure shoe (1) for pressing finish band onto surfaces of a rotating workpiece, with a carrier (2), a radial press-on surface (3) for pressing finish band onto a circumferential surface of the workpiece, and axial press-on surfaces (4) for pressing the finish band onto axially aligned cheek surfaces of the workpiece that border the circumferential surface, wherein
at least one axial press-on surface (4) is formed by at least one axial press-on element (5), and the at least one axial press-on element (5) can be at least sectionally moved at least in an axial direction (9) relative to the carrier (2).

Claims

1. A pressure shoe (1) for pressing finish band onto surfaces of a rotating workpiece, with a carrier (2), a radial press-on surface (3) for pressing finish band onto a circumferential surface of the workpiece, and axial press-on surfaces (4) for pressing the finish band onto axially aligned cheek surfaces of the workpiece that border the circumferential surface, wherein at least one axial press-on surface (4) is formed by at least one axial press-on element (5), and the at least one axial press-on element (5) is at least sectionally moveable at least in an axial direction (9) relative to the carrier (2), characterized in that the pressure shoe (1) comprises a holder (6) for fastening the pressure shoe (1) to a processing machine, wherein the carrier (2) is mounted movably in the axial direction (9) on the holder (6).

2. The pressure shoe (1) according to claim 1, wherein at least one linear bearing (10) is formed between the holder (6) and the carrier (2).

3. The pressure shoe (1) according to claim 2, wherein the carrier (2) is detachably fastenable to at least one coupling component, wherein the at least one linear bearing (10) is arranged between the coupling component and the holder (6).

4. The pressure shoe (1) according to claim 2, wherein the holder (6) is U-shaped, and a respective linear bearing (10) is arranged in both legs of the holder (6).

5. A pressure shoe (1) for pressing finish band onto surfaces of a rotating workpiece, with a carrier (2), a radial press-on surface (3) for pressing finish band onto a circumferential surface of the workpiece, and axial press-on surfaces (4) for pressing the finish band onto axially aligned cheek surfaces of the workpiece that border the circumferential surface, wherein at least one axial press-on surface (4) is formed by at least one axial press-on element (5), and the at least one axial press-on element (5) is at least sectionally movable at least in an axial direction (9) relative to the carrier (2), characterized in that the axial press-on element (5) is coupled with the carrier in the axial direction (9) in such a way that a force in the axial direction (9) is impingeable on the at least one axial press-on element (5) by pressing the radial press-on surface (3) of the pressure shoe (1) onto the circumferential surface of the workpiece.

6. The pressure shoe (1) according to claim 5, wherein the radial press-on surface (3) is at least sectionally formed by at least one radial press-on element (7), and the radial press-on element (7) is mounted movably in radial direction (8) to the carrier in such a way that the radial press-on element (7) can be moved toward the carrier (2) by pressing the pressure shoe (1) onto the circumferential surface of the workpiece, wherein the radial press-on element (7) is coupled with the at least one axial press-on element (5) in such a way that the at least one axial press-on element (5) is impingable with a force in the axial direction (9) by pressing the radial press-on element (7) onto the circumferential surface of the workpiece.

7. The pressure shoe (1) according to claim 6, wherein the at least one radial press-on element (7) is spring-preloaded in the direction of the circumferential surface of the workpiece.

8. The pressure shoe (1) according to claim 6, wherein the coupling between the at least one radial press-on element (7) and the at least one axial press-on element (5) is established via wedge surfaces (11).

9. The pressure shoe (1) according to claim 6, wherein at least three radial press-on elements (7) are provided, which each interact with two axial press-on elements (5) that can be impinged with a force in opposite direction.

10. The pressure shoe (1) according to claim 1, wherein the press-on surface is formed at least sectionally by a material that can be deformed during finishing operations.

11. A device for finishing surfaces of shaft-like workpieces, with a workpiece mount, a rotation drive for the workpiece mount, a press-on device for pressing a pressure shoe (1) on a circumferential surface of the workpiece, an oscillation drive for generating an oscillating relative movement between the workpiece mount and the press-on device in an axial direction (9) of the workpiece, and a finish band to be arranged between the pressure shoe (1) and a surface of the workpiece to be processed, characterized in that the pressure shoe (1) is designed according to claim 1.

12. The device according to claim 11, wherein the press-on device comprises two tong arms, to which a respective pressure shoe (1) is fastened.

Description

[0028] The invention as well as the technical background will be exemplarily described below based on the figures. Shown schematically on:

[0029] FIG. 1: is a perspective view of two pressure shoes,

[0030] FIG. 2: is the pressure shoe according to the invention,

[0031] FIG. 3: is a cross section through the pressure shoe according to the invention, and

[0032] FIG. 4: is a longitudinal section through the pressure shoe according to the invention.

[0033] Shown on FIG. 1 is a conventional pressure shoe 1 (top) and a pressure shoe 1 according to the invention (bottom).

[0034] The pressure shoe 1 shown at the top of FIG. 1 is fastened to a press-on arm of a finishing device, and is pressed against a circumferential surface of a workpiece by the press-on arm. During the finishing operation, the pressure shoe 1 performs an oscillating movement in an axial direction relative to the workpiece (not shown). During the finishing operation, a finish band is arranged between the pressure shoe 1 and the circumferential surface of the workpiece to be processed, and is pressed against the circumferential surface of the workpiece to be processed by the pressure shoe 1.

[0035] In addition to a radial press-on surface 3, the pressure shoe 1 according to the invention shown at the bottom of FIG. 1 also has axial press-on surfaces 4, which press the finish band against the cheek surfaces of the workpiece axially bordering the circumferential surface. The press-on surfaces 3, 4 of the pressure shoe 1 shown at the bottom of FIG. 1 are decoupled from the oscillation movement between the press-on arm and workpiece, and thus do not perform any axial movement relative to the surfaces of the workpiece to be processed.

[0036] The pressure shoe 1 has a carrier 2, on which three radial press-on elements 7 and two axial press-on elements 5 are movably mounted. As evident in particular from a combined review of FIGS. 2 and 3, the radial press-on elements 7 comprise part of the radial press-on surface 3, while the two axial press-on elements 5 each comprise part of the radial press-on surface 3 and one respective axial press-on surface 4.

[0037] For purposes of decoupling from the oscillating relative movement between the press-on arm and workpiece, the carrier 2 is mounted on a holder 6 via two linear bearings 10 so it can move in an axial direction 9. The carrier 2, and hence also the press-on elements 5, 7, can thus be moved in the axial direction 9 relative to the holder 6. As a consequence, the press-on surfaces 3, 4 can remain stationary relative to the workpiece, while the press-on arm and the workpiece perform an oscillating movement relative to each other in the axial direction 9.

[0038] As evident from FIG. 3, the radial press-on elements 7 are coupled together with the axial press-on elements 5 by wedge surfaces 11. While pressing the pressure shoe 1, the radial press-on element 7 is moved in a radial direction 8 toward the carrier 2, as a result of which the axial press-on elements 5 are moved in the axial direction 9 in opposite directions due to the wedge surfaces 11. As a consequence, the axial press-on surfaces 4 press the finish band (not shown) against cheek surfaces of the workpiece to be processed. The press-on force acting in the radial direction 8 is thus converted into a press-on force acting in the axial direction 9 for the axial press-on surfaces 4.

[0039] For purposes of finishing, the pressure shoe 1 according to the invention is pressed against a circumferential surface of an shaft-like workpiece arranged between two cheek surfaces, wherein a press-on force is also generated on the cheek surfaces. Since the carrier 2 is mounted so that it can move in an axial direction relative to the holder 6, the press-on surfaces 3, 4 are decoupled from the axial oscillating movement that takes place between the workpiece and the holder 6.

[0040] The two axial press-on elements 5 are coupled together via restoring springs 12, which preload the axial press-on elements 5 toward each other. Also provided are restoring springs 12, which each preload the radial press-on elements 7 away from the carrier 2. The restoring springs 12 automatically return the press-on elements 5, 7 into their original position relative to the carrier 2 when the pressure shoe 1 is lifted from the workpiece. As a consequence, this ensures in particular that the axial press-on elements 5 no longer exert any press-on forces on the cheek surfaces when the pressure shoe 1 is removed from the workpiece.

REFERENCE LIST

[0041] 1 Pressure shoe

[0042] 2 Carrier

[0043] 3 Radial press-on surface

[0044] 4 Axial press-on surface

[0045] 5 Axial press-on element

[0046] 6 Holder

[0047] 7 Radial press-on element

[0048] 8 Radial direction

[0049] 9 Axial direction

[0050] 10 Linear bearing

[0051] 11 Wedge surface

[0052] 12 Restoring spring