Piston groove machining tool

Patent metadata

Field	Value
Publication number	US-10888930-B2
Application number	US-201716312313-A
Country	US
Kind code	B2
Filing date	Jul 7, 2017
Priority date	Jul 7, 2016
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

A tool for machining a groove of a rotation-symmetric component, preferably a piston of an internal combustion engine, is provided. The machining is carried out by a rotation of the tool around an axis of symmetry of the rotation-symmetric component to be machined. The tool includes at least one arm disposed in such a way that a circumference of the rotation-symmetric component can at least be partially enclosed. Also, a machining device for machining of the groove is provided on the at least one arm. At least one adjusting device is provided to adjust a contact force of the at least one machining device on the rotation-symmetric component, and to adapt the tool to different diameters of the rotation-symmetric component.

First claim

What we claim is:

1. A tool for machining a groove of a rotation-symmetric component, comprising a piston of an internal combustion engine, wherein the machining is carried out by a rotation of the tool around an axis of symmetry of the rotation-symmetric component to be machined, the tool comprising:
at least one arm configured to at least partially partially surround a circumference of the rotation-symmetric component;
a machining device arranged on the at least one arm, wherein the machining device is configured to machine the groove;
at least one adjusting device, wherein the at least one adjusting device is configured to: adjust a contact force of the at least one machining device on the rotation-symmetric component, and adapt the tool to different diameters of the rotation-symmetric component, wherein the at least one adjusting device comprises a first and a second half shell, wherein a distance between the first and second half shells is adjustable by a first control element and locked by a second control element.

2. The tool according to claim 1 , wherein the at least one machining device comprises cutting tool or an abrasive element.

3. The tool according to claim 1 , wherein the at least one machining device is configured to move in a direction perpendicular to the extent of the at least one arm and parallel to a diameter of the at least one arm to adjust a width of the at least one machining device relative to a corresponding width of the groove.

4. The tool according to claim 1 , wherein the at least one machining device is removably coupled to the at least one arm.

5. The tool according to claim 4 , wherein the at least one machining device is removably coupled to a holder having the first and second half shells, and the holder is removably coupled to the at least one arm.

6. The tool according to claim 1 , wherein the at least one adjusting device comprises a first adjusting device and a second adjusting device, the first adjusting device is configured to adjust an arm position of the at least one arm relative to a handle, and the second adjusting device comprises the first and second half shells configured to adjust a position of the at least one machining device relative to the at least one arm.

7. The tool according to claim 6 , wherein the at least one arm comprises first and second arms, and the first adjusting device is configured to move the first and second arms relative to the handle to adjust a relative distance between the first and second arms.

8. The tool according to claim 7 , wherein the first adjusting device comprises:
a spindle coupled to the handle, wherein the handle is configured to rotate to cause the spindle to move along an axial path of travel;
a first lever rotatably coupled to the spindle, wherein the first arm is rotatably coupled to the first lever at a first position, the first arm is rotatably coupled to the handle at a second position, and the first and second positions are offset from one another; and
a second lever rotatably coupled to the spindle, wherein the second arm is rotatably coupled to the second lever at a third position, the second arm is rotatably coupled to the handle at a fourth position, and the third and fourth positions are offset from one another.

9. The tool according to claim 8 , wherein the handle comprises a bearing portion extending crosswise to an axis of the handle, the spindle extends through the bearing portion, and the first and second arms are rotatably coupled to the bearing portion at the second and fourth positions.

10. The tool according to claim 1 , wherein the first and second control elements are offset relative to each other, wherein an angular position between the first and second half shells is adjustable to tilt the at least one machining device to a sloping position.

11. The tool according to claim 1 , wherein the at least one arm comprises a guiding device configured to guide the tool along the groove.

12. The tool according to claim 11 , wherein the guiding device comprises one or more guiding elements configured to extend into the groove, one or more guide rollers configured to roll along the circumference of the rotation-symmetric component, or a combination thereof.

13. The tool according to claim 11 , wherein the at least one arm comprises first and second arms, the at least one machining device is provided on the first arm, and the guiding device is provided on the second arm.

14. A tool for machining a groove of a rotation-symmetric component comprising a piston of an internal combustion engine, wherein the machining is carried out by a rotation of the tool around an axis of symmetry of the rotation-symmetric component to be machined, wherein the tool comprises:
a first arm configured to at least partially surround a circumference of the rotation-symmetric component:
a holder coupled to the first arm, wherein the holder is configured to hold a machining device; and
at least one adjuster configured to adjust a contact force of the machining device on the rotation-symmetric component, and adapt the tool to different diameters of the rotation-symmetric component, wherein the at least one adjuster comprises a first half shell and a second half shell, wherein a distance between the first and second half shells is adjustable by a first control element and locked by a second control element.

15. The tool according to claim 14 , wherein the at least one adjuster comprises a first adjuster and a second adjuster, the first adjuster is configured to adjust an arm position of the first arm relative to a handle and/or a second arm, and the second adjuster comprises the first and second half shells configured to adjust a position of the machining device relative to the first arm.

16. The tool according to claim 15 , comprising the second arm, wherein the first adjuster is configured to move the first and second arms relative to the handle to adjust a relative distance between the first and second arms.

17. The tool according to claim 16 , wherein the first adjuster comprises:
a spindle coupled to the handle, wherein the handle is configured to rotate to cause the spindle to move along an axial path of travel;
a first lever rotatably coupled to the spindle, wherein the first arm is rotatably coupled to the first lever at a first position, the first arm is rotatably coupled to the handle at a second position, and the first and second positions are offset from one another; and
a second lever rotatably coupled to the spindle, wherein the second arm is rotatably coupled to the second lever at a third position, the second arm is rotatably coupled to the handle at a fourth position, and the third and fourth positions are offset from one another.

Assignees

• Innio Jenbacher Gmbh & Co Og

Inventors

• Naschberger Manuel
• Hotter Patrick

Classifications

• B23B3/24 Primary

  the tools of which do not perform a radial movement; Rotary tool heads therefor · CPC title

• B23D79/04

  with rotating cutting-tool, e.g. for smoothing linings of bearings · CPC title

• B23B5/00

  Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor · CPC title

• B23D5/00

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

• F02B77/04 Primary

  Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines · CPC title