Method for producing a composite component, and composite component

Patent metadata

Field	Value
Publication number	US-9718120-B2
Application number	US-201314424085-A
Country	US
Kind code	B2
Filing date	Jul 31, 2013
Priority date	Aug 29, 2012
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

The invention relates to a method for producing a composite component ( 12 ). At least one shaft ( 2 ) and at least one sintered part ( 1 ), preferably in the form of a rotor or a cam, are assembled into the composite component. In order to assemble the composite component, at least the following steps are carried out: —introducing the shaft ( 2 ) into a continuous bore ( 3 ) of the sintered part ( 1 ) and —calibrating the sintered part ( 1 ) at least by means of a calibrating die ( 4 ), furthermore preferably with the simultaneous application of an axial force onto the sintered part ( 1 ) by means of at least one upper punch ( 5 ) and at least one lower punch ( 7 ), wherein the shaft ( 2 ) can be found in the bore ( 3 ) of the sintered part ( 1 ) at least temporarily during the calibration process. The invention further relates to a composite component ( 12 ).

First claim

The invention claimed is:

1. A method for producing a composite component, wherein at least one shaft and at least one sintered part having at least one outer periphery, are joined to form the composite component, and wherein the assembly of the composite component comprises at least the following steps of:
introducing the shaft into a continuous bore of the sintered part,
calibrating the sintered part at least by using a calibrating die wherein the shaft is located in the bore of the sintered part at least temporarily during the calibration process.

2. The method according to claim 1 , wherein
the shaft is partially positioned in the calibrating die,
then introducing the shaft into the continuous bore by guiding the sintered part into the calibrating die with the shaft positioned in the calibrating die,
at least partially during and/or partially after the introduction of the shaft into the continuous bore, the sintered part is calibrated in the calibrating die and is thereby joined with the shaft to form the composite component.

3. The method according to claim 2 , wherein partially positioning of the shaft in the calibrating die involves a radially positioning of the shaft by arranging the shaft on a lower punch.

4. The method according to claim 1 , wherein
the shaft is introduced into the continuous bore outside of the calibrating die, the sintered part, with the shaft located in the bore thereof, is positioned in the calibrating die, and, at least partially during and/or partially after the introduction of the shaft into the continuous bore, the sintered part is calibrated in the calibrating die and is thereby joined with the shaft to form the composite component, or
the sintered part is positioned in the calibrating die at least partially, preferably in a region of the lead-in bevel, after which the shaft is introduced into the continuous bore, and, at least partially during and/or partially after the introduction of the shaft into the continuous bore, the sintered part is calibrated in the calibrating die and is thereby joined with the shaft to form the composite component.

5. The method according to claim 1 , wherein the shaft is not oversized relative to the bore before the shaft is introduced into the bore.

6. The method according to claim 1 , wherein, after the shaft is introduced into the bore of the sintered part, the sintered part—with the shaft located in the bore—is pressed into the calibrating die.

7. The method according to claim 1 , wherein the sintered part is axially pressed into the calibrating die.

8. The method according to claim 1 , wherein the sintered part is pressed axially when pressure acts on a top side of the sintered part and/or on an underside of the sintered part at least partially during calibration and in addition to the concentric pressure applied by the calibrating die.

9. The method according to claim 1 , wherein, by calibrating the sintered part with the shaft located in the bore of the sintered part at least temporarily during the calibration, it is possible, in one and the same working step to
establish a non-positive connection between the sintered part and the shaft, and
calibrate the outer periphery of the sintered part by radial compression.

10. The method according to claim 1 , wherein internal compressive stresses are substantially generated within the sintered part by the pressure generated by the calibration of the sintered part, which acts on the sintered part, in interaction with counter pressure generated by the shaft, which is located in the bore of the sintered part.

11. The method of according to claim 10 , wherein a non-positive connection is established between the sintered part and the shaft substantially by the internal compressive stresses.

12. The method according to claim 1 , wherein a circumferential surface of the shaft has at least one knurl and/or a contour that are oversized relative to the circumferential surface of the shaft and/or an inner surface of the bore has at least one knurl and/or contour that are oversized relative to the inner surface of the bore, and that the knurl and/or the contour induce a radial compression of material of the sintered part.

13. The method according to claim 1 , wherein a circumferential surface of the shaft has at least one knurl and/or a contour that are undersized relative to the circumferential surface of the shaft and/or an inner surface of the bore has at least one knurl and/or contour that are undersized relative to the inner surface of the bore, and that the knurl and/or the contour are filled with material of the sintered part and hereby establish a form-fit connection.

14. The method according to claim 1 , wherein the sintered part is comprised, at least in part, of a curable alloy and that, after production of the sintered part, calibration is carried out before the sintered part is cured.

15. The method according to claim 1 , wherein after production of the sintered part, solution annealing and/or quenching at least of the sintered part is carried out and that the sintered part is calibrated before the sintered part is cured.

16. The method according to claim 1 , wherein the sintered part and/or the shaft are comprised, at least in part, of an aluminum alloy, a bronze alloy, a brass alloy, and/or a steel.

17. The method according to claim 1 , wherein the sintered part is in the form of a rotor or a cam.

18. The method according to claim 1 , wherein calibrating the sintered part at least by using a calibrating die includes with a simultaneous application of axial pressure onto the sintered part by at least one upper punch and at least one lower punch.

Assignees

• Gkn Sinter Metals Engineering Gmbh

Inventors

• Kruzhanov Vladislav
• Arnhold Volker

Classifications

• F01L2303/00

  Manufacturing of components used in valve arrangements · CPC title

• F01L2301/00

  Using particular materials · CPC title

• C22C21/00

  Alloys based on aluminium · CPC title

• C22F1/08

  of copper or alloys based thereon · CPC title

• C22C9/02

  with tin as the next major constituent · CPC title