Apparatus and method for the material-removing processing of an adjustable camshaft

Patent metadata

Field	Value
Publication number	US-10077685-B2
Application number	US-201314408219-A
Country	US
Kind code	B2
Filing date	May 29, 2013
Priority date	Jun 15, 2012
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

The invention relates to a method for the material-removing processing of an adjustable camshaft which has a shaft body, wherein at least a first component of the camshaft can move axially and/or in the circumferential direction with respect to the shaft body, wherein a gap which permits the movement is provided between the shaft body and the first component, and wherein in order to protect the first moveable component during the material-removing processing a protection apparatus which has at least one fluid duct is placed on the shaft body and fluid is applied to it. According to the invention, the protection apparatus is arranged laterally with respect to the first moveable component in such a way that at least some of the fluid is directed laterally onto the first component and into an intermediate space between the protection apparatus and the first component, and wherein the first component is exposed in the radial direction. The subject-matter of the invention is also an arrangement for carrying out the method.

First claim

The invention claimed is:

1. A method of processing, by a material-removal process, an adjustable camshaft that includes a shaft body having at least a first component to be processed disposed thereon and defining a gap there between, which gap permits the at least first component to be one or more of axially or rotationally moveable on the shaft body of the camshaft, and a second component that is axially and rotationally fixed on the shaft body of the camshaft, the method comprising:
placing a protection apparatus on a longitudinal section of the shaft body of the camshaft, which longitudinal section is free of other elements such that the protection apparatus is disposed axially adjacent to the first component, so as to partially radially cover an outer circumferential surface of the first component along at least a part of the axial length of the first component, the protection apparatus having at least one fluid duct defined therein;
applying a flow of fluid, from the at least one fluid duct in the protection apparatus, onto the shaft body of the camshaft such that at least some of the fluid is directed laterally onto the first component and into an intermediate space defined between the protection apparatus and an exterior of the first component; and
processing, by a material-removal process, the at least first component of the adjustable camshaft while said protection apparatus is placed on said shaft body and concurrently with said applying step.

2. The method of claim 1 , wherein said step of placing a protection apparatus comprises:
placing a first protection apparatus on the longitudinal section of the shaft body of the camshaft so as to be disposed on a first axial side of the first component; and
placing a second protection apparatus on the longitudinal section of the shaft body of the camshaft so as to be disposed on an opposing second axial side of the first component.

3. The method of claim 1 , further comprising directing a partial flow of fluid from the protection apparatus into the gap between the first component and the shaft body at a first side face of the first component, such that the partial flow of fluid flows through the gap and exits the gap on a second opposing side face of the first component disposed axially opposite the first side face.

4. A method of processing, by a material-removal process, an adjustable camshaft that includes a shaft body having at least a first component to be processed disposed thereon and defining a gap therebetween, which gap permits the at least first component to be one or more of axially or rotationally moveable on the shaft body of the camshaft, the method comprising:
placing a protection apparatus, on the shaft body of the camshaft so as to be disposed axially adjacent to the first component, so as to partially radially cover an outer circumferential surface of the first component along at least a part of an axial length of the first component, the protection apparatus having at least one fluid duct defined therein and having at least one projection extending axially from a side face thereof that faces the first component, which projection is a spacer configured to abut a side face of the first component and set a minimum width of an intermediate space defined between the side face of the protection apparatus and the side face of the first component;
supporting the first component on the at least one projection;
applying a flow of fluid, from the at least one fluid duct in the protection apparatus, onto the shaft body of the camshaft such that at least some of the fluid is directed laterally onto the first component and into the intermediate space defined between the protection apparatus and the side face of the first component;
processing, by a material-removal process, the at least first component of the adjustable camshaft while said protection apparatus is placed on said shaft body and concurrently with said step of applying a flow of fluid; and
washing fluid around the projection.

5. A system for carrying out the method of claim 4 , comprising:
a machining device for machining the first component by a material-removal process; and
the protection apparatus operatively coupled to the machining device and disposable on the shaft body of the adjustable camshaft laterally adjacent to the first component, so as to partially radially cover the outer circumferential surface of the first component along at least a part of the axial length of the first component, the protection apparatus having the at least one projection disposed on a side face thereof that faces the first component, which projection is configured to support the first component, the protection apparatus further comprising the at least one fluid duct defined therein and configured to apply the fluid flow onto the shaft body of the adjustable camshaft when the machining device is operated to machine the adjustable camshaft.

6. The system of claim 5 , wherein the protection apparatus is formed from two elements which can move with respect to one another.

7. The system of claim 5 , wherein an annular duct is formed between the shaft body and the protection apparatus, which annular duct opens both on a first side of the protection apparatus facing the first component and on a second side of the protection apparatus disposed opposite the first component, and which annular duct is connected to a fluid feed line.

8. The system of claim 5 , wherein an annular duct is formed between the shaft body and the protection apparatus, which annular duct opens merely on a side of the protection apparatus facing the first component and is connected to a fluid feed line.

9. The system of claim 5 , wherein an annular duct is formed within the protection apparatus, which annular duct opens on a side of the protection apparatus facing the first component and is connected to a fluid feed line.

Assignees

• Thyssenkrupp Presta Tecct Ag

Inventors

• Binder Thomas

Classifications

• Y10T29/49293

  Camshaft making · CPC title

• F01L2810/02

  Lubrication · CPC title

• F01L2013/0052

  with cams provided on an axially slidable sleeve · CPC title

• F01L2001/0471

  Assembled camshafts · CPC title

• F01L1/053

  overhead type · CPC title