Method for producing a screening device

Patent metadata

Field	Value
Publication number	US-10195645-B2
Application number	US-201615352093-A
Country	US
Kind code	B2
Filing date	Nov 15, 2016
Priority date	May 15, 2014
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

A method for producing a screening device, the method comprising the steps of providing a screening device that includes a plurality of profiled bars and a plurality of bar holder packages associated with the plurality of profiled bars. The plurality of bar holder packages include a plurality of first bar holders and at least one additional bar holder associated with the plurality of first bar holders. The method including the further steps of inserting the plurality of profiled bars parallel to one another into the plurality of bar holder packages, and bending the plurality of bar holder packages such that the plurality of first bar holders and the at least one additional bar holder are bent at the same time.

First claim

What is claimed is:

1. A method for producing a screening device, the method comprising the steps of:
providing a screening device that includes:
a plurality of profiled bars; and
a plurality of bar holder packages associated with the plurality of profiled bars, said plurality of bar holder packages including:
a plurality of first bar holders that have a height, a shape which deviates from a subsequent annular shape of the screening device, and include a plurality of recesses for receiving the plurality of profiled bars; and
at least one additional bar holder associated with the plurality of first bar holders that has a height, measured in a radial direction of the subsequent annular shape of the screening device, that is less than the height of the plurality of first bar holders, a shape which deviates from the subsequent annular shape of the screening device, and includes at least one recess for receiving at least one of the plurality of profiled bars;

inserting the plurality of profiled bars parallel to one another into the plurality of bar holder packages; and
bending the plurality of bar holder packages such that the plurality of first bar holders and the at least one additional bar holder are bent at the same time, whereby the plurality of profiled bars become wedged into the plurality of recesses of the plurality of first bar holders and into the at least one recess of the at least one additional bar holder, and in that after bending the plurality of bar holder packages, a pair of abutment ends of the plurality of bar holder packages are firmly connected with one another.

2. The method of claim 1 , wherein at least one of said plurality of bar holder packages is formed from one first bar holder and one additional bar holder.

3. The method of claim 1 , wherein at least one of said plurality of bar holder packages is formed from one first bar holder and two additional bar holders.

4. The method of claim 1 , wherein said plurality of first bar holders and said at least one additional bar holder are laser cut.

5. The method of claim 1 , wherein said plurality of first bar holders and said at least one additional bar holder of at least one of said plurality of bar holder packages are produced from the same material.

6. The method of claim 1 , wherein said plurality of first bar holders and said at least one additional bar holder of at least one of said plurality of bar holder packages are produced at least partially from a different material.

7. The method of claim 1 , wherein said plurality of first bar holders and said at least one additional bar holder of at least one of said plurality of bar holder packages each have a respective thickness that is the same thickness measured in an axial direction of a finished screening device.

8. The method of claim 1 , wherein said plurality of first bar holders and said at least one additional bar holder of at least one of said plurality of bar holder packages each have a respective thickness that is the same thickness, at least partially, measured in an axial direction of a finished screening device.

9. The method of claim 1 , wherein said plurality of first bar holders are bent into a plurality of rings by a plurality of bending devices, and said at least one additional bar holder, which is associated with said plurality of first bar holders, is dragged along via said plurality profiled bars that are inserted into said plurality of bar holder packages and thus is also be bent into at least one of a plurality rings.

10. The method of claim 9 , wherein said plurality of first bar holders are wedged into said plurality of bending devices when being bent into the plurality of rings.

11. The method of claim 1 , wherein said plurality of bar holder packages is connected with one another at their said pair of abutment ends by welding.

12. The method of claim 1 , additionally including a bending and welding machine that bends said plurality of bar holder packages and joins said pair of abutment ends of said plurality of bar holder packages.

13. A method for producing a screening device, the method comprising the steps of:
providing a screening device that has a respective face side ferrule and includes:
a plurality of profiled bars; and
a plurality of holder packages associated with the plurality of profiled bars, said plurality of bar holder packages including:
at least one first bar holder positioned in said screening device in a region of the respective face side ferrule of the screening device, the at least one first bar holder has a height, a shape which deviates from a subsequent annular shape of the screening device, and includes at least one recess for receiving at least one of the plurality of profiled bars; and
at least one additional bar holder adjoining the at least one first bar holder in an axial direction of the screening device and located between said at least one first bar holder and said respective face side ferrule, the at least one additional bar holder has a height measured in a radial direction of the subsequent annular shape of the screening device that is less than the height of the at least one first bar holder, a shape which deviates from the subsequent annular shape of the screening device, and includes at least one recess for receiving at least one of the plurality of profiled bars;

inserting the plurality of profiled bars parallel to one another into the plurality of bar holder packages;
bending the plurality of bar holder packages such that the at least one first bar holder and the at least one additional bar holder are bent at the same time, whereby the plurality of profiled bars become wedged into the at least one recess of the at least one first bar holder and into the at least one recess of the at least one additional bar holder, and in that after bending the plurality of bar holder packages, a pair of abutment ends of the plurality of bar holder packages are firmly connected with one another;
fitting subsequently said at least one additional bar holder backlash-free into an indentation of said respective face side ferrule;
welding together said at least one additional bar holder with said respective face side ferrule; and
welding together said at least one first bar holder of the plurality of bar holder packages with said respective face side ferrule in the region of an edge of the respective face side ferrule that faces away from said plurality of profiled bars such that the at least one first bar holder is in contact with an inside face of said respective face side ferrule.

14. The method of claim 13 , wherein for the production of a centrifugally operable screening device with said plurality of profiled bars that are inserted on a respective inside edge of said at least one first and additional bar holder, said at least one additional bar holder is welded together with said respective face side ferrule by a welding seam in a region of an inside diameter of said respective face side ferrule, and said at least one first bar holder is welded via a seal seam in a region of an outside diameter of said respective face side ferrule.

15. The method of claim 13 , wherein the screening device is a screen basket for a pressure screen that can be utilized in the paper industry.

Assignees

• Voith Patent Gmbh

Inventors

• Burger Ralf
• Zavornik Oliver
• Zavornik Ivica
• Brettschneider Werner

Classifications

• B01D29/445

  Bar screens · CPC title

• D21D5/16

  Cylinders and plates for screens · CPC title

• B07B1/4618 Primary

  Manufacturing of screening surfaces · CPC title

• B07B1/18 Primary

  Drum screens · CPC title