Method for thermally joining non-round functional components to a shaft

Patent metadata

Field	Value
Publication number	US-9579754-B2
Application number	US-201314135563-A
Country	US
Kind code	B2
Filing date	Dec 19, 2013
Priority date	Dec 20, 2012
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

A method may include thermally joining at least one of a non-round functional component to a shaft and a cam to a camshaft, elastically compressing the functional component during introduction of a round through-opening, and creating a through-opening which is not round when the functional component is unstressed and at least minimizes an asymmetrical deformation of the shaft after the thermal joining of the functional component to the shaft.

First claim

The invention claimed is:

1. A method, comprising:
thermally joining a non-round receiving component to a shaft, wherein, prior to thermally joining the receiving component to the shaft, elastically compressing the receiving component and forming a round through-opening when the receiving component is elastically compressed, wherein the through-opening is non-round when the receiving component is unstressed and at least minimizes an asymmetrical deformation of the shaft after the thermal joining of the receiving component to the shaft.

2. The method according to claim 1 , wherein the receiving component is compressed by a jaw-type clamping device during the formation of the through-opening.

3. The method according to claim 2 , wherein at least one jaw of the jaw-type clamping device is pressed against the receiving component with a greater force than at least one other jaw.

4. The method according to claim 1 , wherein the elastic compression takes place in at least one of a force-controlled and a distance-controlled manner such that a centering of the receiving component is provided after joining.

5. The method according to claim 1 , wherein elastically compressing the receiving component includes centering and elastically deforming the receiving component in a force-controlled manner by a plurality of jaws in a jaw-type clamping device, and clamping the receiving component axially against a flat surface in a distance-controlled manner with a plurality of flat clamping jaws, and wherein forming the through-opening of the receiving component includes machining the through-opening in the receiving component when the receiving component is elastically compressed.

6. The method according to claim 5 , wherein the plurality of jaws are prestressed by spring packages and a pressing force necessary for the elastic deformation of the receiving component can be adapted to different receiving components to be machined for forming the through-opening by changing the spring packages.

7. The method according to claim 5 , wherein the receiving component is a cam, and wherein clamping includes the plurality of jaws engaging the cam at two contact regions which lie in a region of a cam tip and of an opposite base circle.

8. The method according to claim 5 , wherein the plurality of jaws centre and elastically deform the receiving component via clamping elements before clamping the receiving component with the plurality of flat clamping jaws.

9. The method according to claim 1 , wherein forming the through-opening includes at least one of drilling, grinding, reaming, turning and milling.

10. The method according to claim 1 , further comprising holding the receiving component by a gripping device during at least one of thermally joining the receiving component to the shaft and introducing the shaft into the through-opening such that the non-round through-opening becomes round due to elastic deformation.

11. The method according to claim 1 , wherein at least one of the receiving component is a cam and the shaft is a camshaft.

12. The method according to claim 6 , wherein the plurality of jaws center and elastically deform the receiving component via clamping elements before clamping the receiving component with the plurality of flat clamping jaws.

13. A method, comprising:
thermally joining a non-round receiving component to a shaft, wherein the thermal joining includes:
elastically compressing the receiving component and forming a round through-opening when the receiving component is elastically compressed; and
joining the receiving component onto the shaft;
wherein the through-opening is non-round when the receiving component is unstressed and at least minimizes an asymmetrical deformation of the shaft after thermally joining the receiving component to the shaft.

14. The method according to claim 13 , wherein the receiving component is a cam and the shaft is a camshaft.

15. The method according to claim 13 , wherein the elastic compressing includes compressing the receiving component by a jaw-type clamping device during forming the through-opening.

16. The method according to claim 15 , wherein compressing the receiving component includes at least one jaw of the jaw-type clamping device pressed against the receiving component with a greater force than at least one other jaw.

17. The method according to claim 16 , wherein the elastic compression takes place in at least one of a force-controlled and a distance-controlled manner such that a centering of the receiving component is provided after thermal joining.

18. The method according to claim 13 , wherein elastically compressing the receiving component includes centering and elastically deforming the receiving component in a force-controlled manner by a plurality of jaws in a jaw-type clamping device, and clamping the receiving component axially against a flat surface in a distance-controlled manner with a plurality of flat clamping jaws, and wherein forming the through-opening of the receiving component includes machining the through-opening in the receiving component when the receiving component is elastically compressed.

19. The method according to claim 18 , wherein the receiving component is a cam, and wherein clamping includes the plurality of jaws engaging the cam at two contact regions disposed in a region of a cam tip and of an opposite base circle.

20. The method according to claim 13 , wherein forming the through-opening includes at least one of drilling, grinding, reaming, turning and milling.

Assignees

• Mahle Int Gmbh

Inventors

• Beerens Christoph
• Dautel Frank
• Menonna Antonio

Classifications

• B23P2700/02

  Camshafts · CPC title

• Y10T29/49293

  Camshaft making · CPC title

• F16B4/006

  Shrinkage connections, e.g. assembled with the parts being at different temperature · CPC title

• B23P11/025 Primary

  by using heat or cold · CPC title

• B23P11/02

  by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits · CPC title