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US 9,000,323 B2Granted
Method for connecting a shaft and a hub and shaft-hub arrangement
AssigneeMAGNA Powertrain AG & Co KG
InventorsAlexander Dietrich, Markus Schuiki
Life of this patent
Estimating the term…
Abstract
A method for connecting a shaft and a hub, the hub having a first joining portion and a second joining portion for a connection to corresponding joining portions of the shaft. The shaft and the hub are pressed together at contact points in the area of the first joining portions, while the second joining portions are not yet in contact with one another, and a welding current is fed via the contact points of the parts that have been pressed together, so that the contact points fuse. The shaft is pressed into the hub, while the first joining portions are being fused, until substantially a press fit is formed between the second joining portions.
Claims20
A method for connecting metal parts, the method comprising:
- providing a hub composed of a metal and having an inner surface thereof with a first hub joining portion, a second hub joining portion and a transitional hub portion adjoining the first and second hub joining portions;
- providing a shaft composed of a metal and having a raised area at an outer circumferential surface thereof with a first shaft joining portion, a second shaft joining portion and a transitional shaft portion adjoining the first and second shaft joining portions, wherein the first shaft joining portion corresponds in shape to the first hub joining portion, the second shaft joining portion corresponds in shape to the second hub joining portion;
- pressing, while the second hub joining portion and the second shaft joining portion are not in contact with one another, and the shaft and the hub are joined together at a first contact point of the first hub joining portion and a second contact point of the first shaft joining portion;
- feeding a welding current via the first contact point and the second contact point that have been pressed together so that the first contact point and the second contact point fuse at the first hub joining portion and the first shaft joining portion;
- and then
- pressing the shaft into the hub by subjecting the shaft to a force in a press-fitting direction which is parallel to an axis extending coaxially between the shaft and the hub, until a press fit is formed at the second hub joining portion and the second shaft joining portion.
3 more elements
A method for connecting metal parts, the method comprising:
- providing a hub composed of a metal and having an inner surface thereof with a first hub joining portion, a second hub joining portion and a transitional hub portion adjoining the first and second hub joining portions;
- providing a shaft composed of a metal and having a raised area at an outer circumferential surface thereof with a first shaft joining portion, a second shaft joining portion and a transitional shaft portion adjoining the first and second shaft joining portions;
- aligning the shaft and the hub so as to have an axis extending coaxially therebetween;
- pressing, while the second hub joining portion and the second shaft joining portion are not in contact with one another, and the shaft and the hub are joined together at a first contact point of the first hub joining portion and a second contact point of the first shaft joining portion to form an air gap between the second hub joining portion and the second shaft joining portion;
- and then
- subjecting the shaft, while the first hub joining portion and the first shaft joining portion are being fused, to a force in a press-fitting direction which is parallel to the axis, until a press fit is formed at the second hub joining portion and the second shaft joining portion.
3 more elements
A method for connecting metal parts, the method comprising:
- providing a hub composed of a metal and having an inner surface thereof with a first hub joining portion, a second hub joining portion and a transitional hub portion adjoining the first and second hub joining portions;
- providing a shaft composed of a metal and having a raised area at an outer circumferential surface thereof with a first shaft joining portion, a second shaft joining portion and a transitional shaft portion adjoining the first and second shaft joining portions, wherein the first shaft joining portion corresponds in shape to the first hub joining portion, the second shaft joining portion corresponds in shape to the second hub joining portion;
- pressing, while the second hub joining portion and the second shaft joining portion are not in contact with one another, and the shaft and the hub are joined together at a first contact point of the first hub joining portion and a second contact point of the first shaft joining portion;
- fusing the first contact point and the second contact point fuse at the first hub joining portion and the first shaft joining portion by feeding a welding current via the first contact point and the second contact point;
- and then
- forming a press fit at the second hub joining portion and the second shaft joining portion by discontinuing the welding current and then subjecting the shaft to a force in a press-fitting direction which is parallel to an axis extending coaxially between the shaft and the hub.
3 more elements
Dependencies are inferred from the claim text.