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Steel strip repair welding method used in fiber breadth material machine

A technology of fiber web machine and welding method, applied in the direction of welding equipment, welding equipment, auxiliary welding equipment, etc., to achieve the effect of avoiding waiting time and reducing repair time

Inactive Publication Date: 2009-04-01
METSO PAPER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Today, one worker is required in the space surrounded by the metal strip, who supports the metal strip within the space surrounded by the metal strip, and a second worker needs to do the repair welding on the opposite side, so the need for cooling cannot be avoided today time

Method used

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  • Steel strip repair welding method used in fiber breadth material machine
  • Steel strip repair welding method used in fiber breadth material machine

Examples

Experimental program
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Effect test

Embodiment Construction

[0011] exist figure 1 with figure 2 Also shown in is an embodiment of a metal belt calender 1 having an arrangement in which the method according to the invention can be applied. A corresponding embodiment is described in the applicant's patent document FI117982. exist figure 1 Three conveyor rollers 2 are shown, around which a metal belt 4 running around the conveyor rollers 2 is arranged. An alternative construction and production of the metal strip 4 is likewise described in the applicant's previous patent document FI117982.

[0012] A thermo roll is indicated with reference numeral 3 . A material web W passes between the first surface 4a of the metal belt 4 and the part of the surface of the thermo roll 3 running tangentially.

[0013] The control of the metal belt 4 of the calender is carried out in the following manner, that is, the position to be welded of the metal belt 4 is controlled to the conveying roller 2 along the running direction of the metal belt 4 by a...

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PUM

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Abstract

The present invention relates to a method for mending and welding the steel strip (4) used in a fiber web machine (1). In the method, an annular metal strip (4) which is supported by a plurality of conveying roller (2) and is in an operating state is stopped from moving. The position of the metal strip (4) to be welded is stopped on a surface of the conveying roller (2) along an operating direction of the metal strip (4). The metal strip (4) is supported by the conveying roller (2) at least at the position to be welded. The metal strip (4) is executed with mending and welding from an oppositeside of the surface (4b) opposite to the conveying roller (2).

Description

technical field [0001] The invention relates to a method for repair welding of steel strips used in a fiber web machine, in which a running endless metal strip supported by a plurality of conveyor rollers is stopped. Background technique [0002] Currently, metal belts applied in fiber web machines are subjected to fatigue loads and corrosion loads in operation. In addition, the metal strip is subject to extremely high wear forces which can lead to fatigue cracks in the metal strip. This is the case, for example, in metal calenders and CondeBelt belt dryers. In the applicant's patent document FI 117982 it is attempted to join metal strip blanks to each other by friction welding (the composition of the seam is the same as that of the base material) and by using a process such as heat treatment at the seam between the blanks. A method of reducing slip (schlupfmindernde) to overcome wear-related disadvantages. [0003] Although the occurrence of strip wear can be reduced wit...

Claims

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Application Information

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IPC IPC(8): B23K37/00B23K26/20B23K9/16B23K20/12B23P6/00
CPCB23K37/04B23K31/02D21G1/0066F16G3/10
Inventor 米卡·维尔扬马
Owner METSO PAPER INC
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