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Repair method for press roll of roll press

A repair method and technology of roller press, which can be applied to arc welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of expensive pressure rollers and increase production costs.

Inactive Publication Date: 2012-10-24
盐城市成功机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Significantly increased production costs as new press rolls are expensive

Method used

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  • Repair method for press roll of roll press
  • Repair method for press roll of roll press
  • Repair method for press roll of roll press

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Effect test

Embodiment Construction

[0025] The repair method of the roller of the roller press is to pretreat the roller surface with carbon arc gas explosion on the worn surface of the roller 1 in the first line, and plan off the wear-resistant layer of the roller surface. Then use dyeing flaw detection agent to check whether there are cracks, dig holes for the cracks that appear on the surface of the roller, fill up the holes dug by manual welding, and heat the pressure roller 1 as a whole to 120-145°C . When the pressure roller 1 is heated to 120-145°C as a whole, the first layer of primer layer 2 on the roller surface is surfacing with YB-01 welding wire in open arc welding, such as figure 1 As shown, surfacing welding parameters: current 350-400A, voltage 28-32V, welding wire extension 30-35mm, welding speed 450-500mm / min, and keep the temperature of pressure roller 1 at 120-145°C. The composition of YB-01 welding wire is: 0.08%~0.14% C, 9.00%~11.00% Cr, 14.00%~17.00% Mn, 0~0.04% P, 0~0.03% S, 0~0.50% Si,...

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Abstract

The invention discloses a repair method for the press roll of a roll press. The repair method comprises the following steps of: on the surface of the press roll, pre-treating the roll surface by carbon arc air explosion, and gouging off the wear-resistant layer of the roll surface; performing a flaw detection by using a dye flaw detection agent to check whether cracks exist, performing a pit excavation treatment on the cracks partially occurring on the roll surface, and filling the excavated pits via manual welding; after determining that the roll surface is qualified, warming the whole press roll to 120-145 DEG C, and surfacing the first backing layer of the roll surface in a manner of open arc welding by using YB-01 welding wires; when the first backing layer is surfaced to a place which is 8 mm away from the radial direction of the standard roll surface by using the YB-01 welding wires, surfacing the second wear-resistant layer by using YB-02 welding wires; surfacing the third special wear-resistant layer by using YB-03 welding wires; surfacing the fourth pattern layer having a structural shape which is an in-line shape, a diamond, a diamond with a point at the centre, a wave shape or a herringbone shape by using the YB-03 welding wires; surfacing the two end surfaces of the press roll by using the YB-02 welding wires; and after the two end surfaces are grinded levelly, surfacing a layer by using the YB-03 welding wires.

Description

technical field [0001] The invention relates to a method for repairing pressure rollers of a roller press. Background technique [0002] The roller press is an energy-saving grinding equipment that can significantly increase the output of the grinding system and reduce energy consumption. The roller press contains a pair of pressing rollers, and the material is in a powdery or broken state through the extrusion of the pair of pressing rollers. Taking the roller press with a specification of Φ120×45 as an example, the average extrusion material of this roller press is 120-150t / h, and it operates continuously for 24 hours. Since the roller surface of the roller of the roller press is in direct contact with the material, the high-pressure extrusion stress is extremely high, and a fatigue layer of a certain thickness will be formed on the roller surface, so it is inevitable that there will be wear and peeling failure on the roller surface of the roller press. After a perio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04
Inventor 贾林喜倪新慧郑兆光刘亮
Owner 盐城市成功机械制造有限公司
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