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Method for connecting attachment element to hollow shaft

A technology for attaching elements and connecting methods, applied in the fields of camshafts and internal combustion engines, can solve problems such as difficult sealing, corrosion, and high cost, and achieve the effect of reducing corrosion risk and promoting corrosion.

Active Publication Date: 2018-02-23
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result of flushing or cleaning, respectively, moisture can also collect in the region of the welding beads, which subsequently leads to long-term corrosion
Subsequent sealing of the contaminated area is only possible and difficult on that side of the pipe, and therefore extensive and expensive due to the long paths

Method used

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  • Method for connecting attachment element to hollow shaft
  • Method for connecting attachment element to hollow shaft
  • Method for connecting attachment element to hollow shaft

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Embodiment Construction

[0022] according to Figure 1 to Figure 5 , the camshaft 1 according to the invention has a camshaft tube 3 embodied as a hollow shaft 2 which is connected to an attachment element 4 via a connection method according to the invention which will be described in more detail below, for example via Friction welded connection 6 (see figure 2 , Figure 4 with Figure 5 ) or via a laser welded connection 6' to the drive element 4a, plug 5, phase shifter, gear or sensor wheel. When the friction welded connection 6 is established, welding beads 7 are thereby created, ie respectively on the outside and inside of the hollow shaft 2 or on the tubular appendage 8 of the attachment element 4 , eg the plug 5 . After completion of the friction welding connection 6 on the inside of the hollow shaft 2 or on the tubular attachment 6 respectively, this welding bead 7 cannot be removed or can only be removed with difficulty. In the case of weld seams 15 corresponding to laser welding, this ca...

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PUM

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Abstract

The invention relates to a method for connecting an attachment element (4) to a hollow shaft (2), wherein a closing element (9) is introduced at least into the hollow shaft (2), and the attachment element (4) is welded to the hollow shaft (2) through a friction welding connection member (6) or a laser welding connection member (6').

Description

technical field [0001] The present invention at hand relates to a method for connecting an attachment element to a hollow shaft. The invention also relates to a camshaft comprising a camshaft tube embodied as a hollow shaft connected to an attachment element via such a connection method. The invention also relates to an internal combustion engine comprising such a camshaft. Background technique [0002] When producing the camshaft, the attachment elements arranged on the longitudinal end sides, such as gearwheels or pulleys, are for example connected to the camshaft tube of the camshaft, usually in a rotatably fixed manner via a friction welded connection. However, this is problematic in that non-removable weld beads are created, which are not only dirty but also form a good deposition surface for chips, which are friction welded inside the hollow shaft, for example, of a camshaft tube Created internally. Although no welding beads are created in the case of laser welding,...

Claims

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Application Information

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IPC IPC(8): B23K20/12B23K26/28
CPCB23K20/122B23K26/28B23K20/129B23K26/282B23K26/70B23K2101/005
Inventor 安东尼奥·梅农纳马里奥·莫勒
Owner MAHLE INT GMBH