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Method and arrangement for improving fixing arrangement of chipper blade

A technology of fixtures and chippers, applied in the direction of manufacturing tools, grain processing, wood processing appliances, etc., can solve the problems of increased curvature, wear of strips and support parts, and reduced material properties, etc., to achieve a simplified overall structure and good Effects of strength properties, economic costs

Inactive Publication Date: 2011-10-26
ANDRITZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While furnace heating on the one hand produces a more uniform heating but on the other hand degrades the properties of the material, flame heating allows a more precise concentration of the heat on the area to be coated, but at the same time has the disadvantage that the part is heated unevenly due to , mainly due to increased curvature due to one-sided heating and thus one-sided heat distribution, and resulting problems of the type discussed above
However, this device has the disadvantage that the edge of the coating positioned towards the blade must be kept at a distance from the blade and the support
[0012] This leads to the additional problem that the uncoated strip and support start to wear during operation and create "holes" in the worn section between the blade and the coating

Method used

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  • Method and arrangement for improving fixing arrangement of chipper blade
  • Method and arrangement for improving fixing arrangement of chipper blade
  • Method and arrangement for improving fixing arrangement of chipper blade

Examples

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Embodiment Construction

[0027] Figure 1 shows a detail of a disc chipper 1 for the production of wood chips in a roughly tangential section. The chipper 1 has a cutterhead 5 arranged for rotation about its axis within a chipper frame (not shown). The wood is chipped by means of blades 6 which are generally adapted to the cutter head 5 slightly offset in the radial direction, only one of which is shown in FIG. 1 . Traditionally, when fixing the blades, so-called embedded blade arrangements are used, wherein the blade 6 inserted into the cutter head is supported in particular in the radial direction by a wear segment part 9 and supported from the front side by a tool holder 11, the wear segment part 9 is positioned at the blade The disc 5 is arranged internally against the end surface 5b of the cutter disc 5, in direct or indirect contact with this end surface 5b.

[0028]The blades 6 are arranged to pass the edge of a counter edge (not shown) at a distance corresponding to the desired blade pitch whe...

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PUM

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Abstract

The invention relates to a method of improving the fixing arrangement of a chipper (1) blade (6), said chipper (1) comprising an essentially cylindrical blade disc (5), one end surface (5b) of which is provided with one or more blades (6) extending essentially radially in relation to the blade disc (5) and for support thereof a wearing segment (9) is arranged, said chipper (1) being provided with a wearing surface (3) subsequent the blade for resisting the stress caused by the logs being chipped in the chipper. In the practice of the method, at least one blade segment (29) is arranged to be supported onto the blade (6) and the wearing segment (9), an upper surface (29b) of which forms a desired portion (3b) of the wearing surface (3), and a coating (10) is formed on the upper surface (29b) to resist said stress.

Description

technical field [0001] The present invention relates to a method for improving the attachment of the blades of a chipper comprising a substantially cylindrical cutterhead, one end surface of which is provided with a substantially radially extending One or more blades, and in order to support the one or more blades, a wear section is arranged, the upper surface of which wear section is provided with a coating for resisting the stresses caused by the chipping of the log in the chipper. The invention also relates to a device for carrying out the method. Background technique [0002] Wood chips for the needs of the paper and pulp industry are usually produced using disc chippers. The chipper has a cutterhead supported on a bearing within the frame that is rotatable about its axis, and a plurality of blades are fitted to the cutterhead slightly offset from the blade radius. The blades are arranged to pass the edge of the counter edge at a distance corresponding to the desired b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27L11/00
CPCB27L11/005Y10T29/49826B02C18/06
Inventor 佩卡·科科卡里·加斯克兰尼
Owner ANDRITZ AG