Method for roller burnishing a cylindrical component part surface

Patent metadata

Field	Value
Publication number	US-9339858-B2
Application number	US-201313897649-A
Country	US
Kind code	B2
Filing date	May 20, 2013
Priority date	May 22, 2012
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

A method for roller burnishing a cylindrical component part surface of a workpiece includes using a roller burnishing tool including at least one rolling element. The at least one rolling element is pressed by hydrostatic pressurization radially outwardly against the component part surface and is left to roll down on the component part surface by rotating the roller burnishing tool or the workpiece. The torque arising as a result of the friction between the at least one rolling element and the component part surface is detected and sent for evaluation.

First claim

What is claimed is:

1. A method for roller burnishing a cylindrical component part surface of a workpiece comprising:
using a roller burnishing tool including at least one rolling element, wherein the at least one rolling element is pressed by hydrostatic pressurization radially outwardly against the component part surface and is left to roll down the component part surface by rotating the roller burnishing tool or the workpiece;
detecting torque or a measured value representing the torque which arises as a result of friction between the at least one rolling element and the component part surface;
supplying the detected torque or measured value representing the torque for evaluation; and
determining whether the detected torque or measured value representing torque indicates that the at least one rolling element is rolling or sliding with respect to the component part surface based on the evaluation.

2. The method according to claim 1 , wherein the evaluation includes:
comparing the detected torque or measured value representing the torque with a predetermined boundary value.

3. The method according to claim 2 , wherein the roller burnishing is interrupted when the boundary value is exceeded.

4. The method according to claim 1 , the detecting torque or a measured value representing the torque comprising detecting a drive power of a rotary drive of the roller burnishing tool.

5. The method according to claim 1 , the detecting torque or a measured value representing the torque comprising detecting a torsion of the roller burnishing tool as the measured value representing the torque.

6. The method according to claim 1 , wherein the at least one rolling element is a ball.

7. The method according to claim 1 , further comprising:
supplying a cooling lubricant that is branched off from a production unit to the roller burnishing tool as hydraulic medium for the hydrostatic pressurization of the at least one rolling element.

8. The method according to claim 1 , wherein the workpiece is one of a high pressure reservoir and a pump collector of a modular common rail injection system of internal combustion engines.

Assignees

• Bosch Gmbh Robert

Inventors

• Graspeuntner Christian
• Meisl Christian

Classifications

• B21C37/30 Primary

  Finishing tubes, e.g. sizing, burnishing · CPC title

• B24B39/02 Primary

  designed for working internal surfaces of revolution · CPC title

• B24B39/00

  Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone (modifying the physical properties or structure of metal by burnishing C21D7/08, C22F1/00); Accessories therefor · CPC title

• Y10T29/47

  Burnishing · CPC title

• B24B39/023

  the working tool being composed of a plurality of working rolls or balls · CPC title