Process for connecting functional elements to a shaft

Patent metadata

Field	Value
Publication number	US-10539191-B2
Application number	US-201214358393-A
Country	US
Kind code	B2
Filing date	Nov 15, 2012
Priority date	Nov 16, 2011
Publication date	Jan 21, 2020
Grant date	Jan 21, 2020

Abstract

A method for connecting functional elements (14) to a shaft (10, having the following steps: (a) forming elevations (12) for receiving the functional elements (14), said elevations (12) being machined out of the shaft (10) by removing material, and (b) welding the functional elements (14) to the elevations (12) on the shaft (10).

First claim

The invention claimed is:

1. A process for connecting functional elements to a shaft of a mixer, kneader, stirrer or comminutor for polymer materials, comprising the following steps:
(a) forming elevations on a shaft of a mixer, kneader, stirrer or comminutor for receiving functional elements wherein the elevations are formed by providing a circular-cylindrical shaft and removing material from an outer cylindrical surface of the circular-cylindrical shaft so as to define the elevations as continuous integral portions of the shaft; and
(b) welding the functional elements to the elevations on the shaft, wherein the functional elements are bars, blades, arms, hooks, journals, helices, paddles, knives or studs for processing the polymer materials.

2. The process according to claim 1 , wherein the functional elements are welded to the elevations on the shaft with full attachment.

3. The process according to claim 1 , wherein the elevations on the shaft and/or the functional elements are whetted with few notches during preparation for welding.

4. The process according to claim 1 , wherein the functional elements are welded to the elevations on the shaft with one of an X seam, a double-U seam, a double-Y seam, and a double-V seam.

5. The process according to claim 1 , including checking welded seams after welding by one of ultrasound, by X-rays, by a dye penetration test and another non-destructive examination process.

6. The process according to claim 1 , including manufacturing the shaft and/or the functional elements from a duplex steel.

7. The process according to claim 6 , including manufacturing the shaft and the functional elements from the same material.

8. The process according to claim 7 , including using a weld filler for welding the functional elements to the elevations on the shaft, wherein the material of the weld filler is identical to the material of the shaft and of the functional elements.

Assignees

• List Ag
• Basf Se
• List Tech Ag

Inventors

• Stephan Oskar

Classifications

• B02C13/2804

  the beater elements being rigidly connected to the rotor · CPC title

• B23K20/10

  making use of vibrations, e.g. ultrasonic welding · CPC title

• B23K31/022

  Making profiled bars with soldered or welded seams · CPC title

• B23K9/0026

  specially adapted for particular articles or work · CPC title

• E02F9/2866 Primary

  for rotating digging elements (for milling machines B28D1/186; for mining machines E21C35/18) · CPC title