Device for jointing a plurality of elements on a shaft

Patent metadata

Field	Value
Publication number	US-11020788-B2
Application number	US-201816209769-A
Country	US
Kind code	B2
Filing date	Dec 4, 2018
Priority date	Oct 27, 2015
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

A method for jointing elements, each having a cutout, on a shaft by a device for producing a control shaft, comprises disposing the elements vertically above one another, aligned, and fixed. The method also comprises pushing the shaft in vertically from above though the cutouts of the elements by a traversable guide carriage of the device and displacing by a pneumatic piston of the device the traversable guide carriage and the shaft attached thereto until a maximum first press-in force is reached. The method further comprises displacing by at least two spindles of an electric spindle drive of the device the traversable guide carriage and the shaft when the maximum first press-in force is exceeded.

First claim

The invention claimed is:

1. A method for jointing elements, each comprising a cutout, on a shaft by a device, for producing a control shaft, comprising:
traversing at least two spindles of an electrical spindle drive of the device into a predefined end position;
disposing the elements vertically above one another, aligned, and fixed;
pushing the shaft in vertically from above through the cutouts of the elements by a traversable guide carriage of the device;
wherein pushing the shaft by the traversable guide carriage includes displacing by a pneumatic piston of the device the traversable guide carriage of the device and the shaft attached to the traversable guide carriage until a maximum first press-in force is reached;
displacing, in a press-fit jointing operation, the traversable guide carriage and the shaft by the at least two spindles of the electric spindle drive of the device when the maximum first press-in force is exceeded; and
wherein traversing the at least two spindles of the electrical spindle drive of the device into the predefined end position comprises traversing the at least two spindles of the electrical spindle drive of the device into the predefined end position in a thermal jointing operation.

2. The method according to claim 1 , wherein displacing by the pneumatic piston of the device the traversable guide carriage and the shaft attached to the traversable guide carriage comprises displacing by the pneumatic piston of the device the traversable guide carriage and the shaft attached to the traversable guide carriage in one of a thermal jointing operation and a press-fit jointing operation; and
wherein displacing by the at least two spindles of the electric spindle drive of the device the traversable guide carriage and the shaft comprises displacing by the at least two spindles of the electric spindle drive of the device the traversable guide carriage and the shaft in the press-fit jointing operation.

3. The method according to claim 2 , further comprising:
in the thermal jointing operation, switching off the device if at least one of the maximum first press-in force is exceeded and any spindle head of respective spindle heads of the at least two spindles is raised from an underside of the traversable guide carriage; and
in the press-fit jointing operation, maintaining a rotation of the at least two spindles if the maximum first press-in force is exceeded so that the at least two spindles continue to until the spindle heads lie against respective stop contours of the traversable guide carriage in regions of the spindle heads, wherein the at least two spindles, with their spindle heads, continue to press the traversable guide carriage via the stop contours up to at least one of a predefined maximum second press-in force and a predefined displacement path.

4. The method according to claim 1 , wherein the elements are disposed aligned and fixed with respect to a rotation angle position.

5. The method according to claim 1 , wherein pushing the shaft in vertically from above by the traversable guide carriage includes guiding the traversable guide carriage with at least two guide rods running parallel to the at least two spindles and parallel to the pneumatic piston.

6. The method according to claim 1 , wherein the elements include at least one of cams, balancing masses, gearwheels, and bearings.

7. A method for jointing elements, each comprising a cutout, on a shaft by a device, for producing a control shaft, comprising:
penetrating a traversable guide carriage of the device with at least two spindles of an electrical spindle drive of the device;
disposing the elements vertically above one another, aligned, and fixed;
pushing the shaft in vertically from above through the cutouts of the elements by the traversable guide carriage of the device;
wherein pushing the shaft by the traversable guide carriage includes displacing by a pneumatic piston of the device the traversable guide carriage of the device and the shaft attached to the traversable guide carriage until a maximum first press-in force is reached;
displacing, in a press-fit jointing operation, the traversable guide carriage and the shaft by the at least two spindles of the electric spindle drive when the maximum first press-in force is exceeded;
wherein displacing the traversable guide carriage and the shaft by the at least two spindles includes engaging respective spindle heads of the at least two spindles against corresponding stop contours of the traversable guide carriage disposed spaced apart from an underside of the traversable guide carriage, and pressing the traversable guide carriage via the stop contours further downwards for the press-fit jointing operation.

8. The method according to claim 7 , wherein the pneumatic piston contacts an upper side of the traversable guide carriage for pushing the shaft in vertically from above through the cutouts of the elements.

9. The method according to claim 7 , wherein the elements are disposed aligned and fixed with respect to a rotation angle position.

10. The method according to claim 7 , wherein pushing the shaft in vertically from above by the traversable guide carriage includes guiding the traversable guide carriage with at least two guide rods running parallel to the at least two spindles and parallel to the pneumatic piston.

11. The method according to claim 7 , wherein the elements include at least one of cams, balancing masses, gearwheels, and bearings.

Assignees

• Mahle Int Gmbh
• Maschb Service Automatisierungstechnik Chemnitz Gmbh

Inventors

• Menonna Antonio
• Morgenstern Stefan
• Schacherer Roland

Classifications

• B23P11/025 Primary

  by using heat or cold · CPC title

• F01L2303/00

  Manufacturing of components used in valve arrangements · CPC title

• F16D1/0858

  due to the elasticity of the hub (including shrink fits) · CPC title

• B23P2700/02

  Camshafts · CPC title

• B23P11/00

  Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for  (connecting sheet metal or metal tubes, rods or profiles B21D39/00; riveting B21J; soldering, unsoldering, welding B23K; hand tools for connecting wire or strip B25B25/00; connecting metal parts by adhesives F16B11/00) · CPC title