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Roller repairing method

A repair method and roll technology, which is applied in the field of roll repair and can solve problems such as broken pin holes on rings and falling off of rings

Pending Publication Date: 2021-09-28
成都三强轧辊股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this application is to provide a repair method for rolls, which solves the problem that the pin holes on the rings are broken or even the rings fall off due to the pin fastening in the structure of the prior art

Method used

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Examples

Experimental program
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Embodiment 1

[0032] Please refer to figure 1 , the present invention provides a repair method for roll 1,

[0033] Step 1: Carry out turning processing on the surface of the roll neck of the roll 1, and remove the worn parts on the surface, so as to obtain a clean surface of the roll 1. In detail, the roll 1 described in this application can be made of cast steel, semi-steel, ductile iron, or cast iron, and its size and taper should be processed according to the drawing requirements during turning. The surface of roll 1 after turning generally does not need to be polished. The surface of roll 1 is processed with high surface roughness. When necessary, it will be processed by grinding. The surface of roll neck in roll 1 that is used for assembly does not need to be cleaned. But it should be kept as clean as possible. It is worth noting that this repair method is best used for the repair of the roll neck of roll 1. After removing the defects, the strength of roll 1 needs to be checked. Onl...

Embodiment 2

[0040] On the basis of embodiment 1, the technical scheme of the present invention is further improved, specifically:

[0041] The repair method of roll 1 comprises the following steps:

[0042] Step 1: Carry out turning processing on the surface of the roll neck of the roll 1, and remove the worn parts on the surface, so as to obtain a clean surface of the roll 1.

[0043] Both the roll neck of the roll 1 and the forging ring 2 have a taper, the directions of the two tapers are the same and matched, and the small end of the taper is on the inner side. Specifically, such as image 3 As shown, the small taper head is at the inner end, the inner circle of the forging ring 2 is a tapered hole, and the outer circle of the roll neck of roll 1 is also tapered, and the small taper end is at the inner end, that is, the diameter of the outer end surface of the roll neck of roll 1 is larger than this The diameter at the shaft diameter where the segment is connected to the adjacent one...

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Abstract

The invention provides a roller repairing method which comprises the following steps: step 1, carrying out turning processing on the surface of the roller neck part of a roller and removing the abraded part of the surface, so as to obtain the clean roller surface; step 2, carrying out penetrant flaw detection on the turned roller and detecting whether sunken parts exist on the roller surface or not; step 3, processing a forging ring, wherein the interference magnitude of the forging ring ranges from 0.4 / 1000 mm to 0.6 / 1000 mm; step 4, putting the forging ring into a heating furnace for heating and measuring the size of an inner hole in the forging ring in the heating process; step 5, assembling the forging ring which is heated to meet the requirement with the roller neck of the roller and hammering the forging ring in the forging ring cooling process the forge piece ring, so as to ensure that the forging ring can be tightly matched with the end surface of the roller; and step 6, completing the assembling and repairing operation after the forging ring is cooled. Through the roller repairing method, the problem that when a pin shaft is used for fastening in a structure of the prior art, the position of a pin hole in a ring component is fractured and even the ring component falls off can be solved.

Description

technical field [0001] The invention relates to the technical field of roll defect repair, in particular to a roll repair method. Background technique [0002] The roll is a key tool for steel rolling production, but during the production and use of the roll, defects such as cracks, slag inclusions, and looseness may appear on the neck of the roll. Among these defects, the rolls with small defects, shallow defect depth and continued use after repairing, in the past repair process, the processed ring parts adopt a small interference amount, and the ring parts and the The wear position of the roll diameter is fixed, and the end of the pin is plug-welded. This method will easily cause the assembled ring to break at the pin hole because the ring needs to be processed with a pin hole and the strength is weak, and the pin is used for fixing. When the assembled product is in use, the pin shaft may break, which will eventually cause the ring to fall off. Contents of the invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00
CPCB23P6/00
Inventor 付家双杨德明徐强
Owner 成都三强轧辊股份有限公司
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