Search

CN-121972904-A - Method for repairing abrasion of inner hole of coiling block cylinder body of coiling block

CN121972904ACN 121972904 ACN121972904 ACN 121972904ACN-121972904-A

Abstract

The invention provides a method for repairing abrasion of an inner hole of a coiling block cylinder body of a coiling machine. Aiming at the weakness of the existing reel body repairing technology, the invention adopts the inner hole sleeve embedding repairing technology for the reel body by analyzing the material and the field use working condition of the reel body, thereby avoiding the premature scrapping of the reel body, enabling the reel body to be reused for a long time and reducing the purchase cost of spare parts of the reel body.

Inventors

  • CAO WEI
  • HU PING

Assignees

  • 宝山钢铁股份有限公司

Dates

Publication Date
20260505
Application Date
20241031

Claims (10)

  1. 1. A method for repairing abrasion of an inner hole of a coiling block cylinder body of a coiling machine is characterized in that a replaceable inlay sleeve is assembled at an easily-abraded part of the inner hole of the coiling block cylinder body, and the inlay sleeve is in interference fit with the inner hole of the coiling block cylinder body.
  2. 2. The method for repairing the wear of the inner hole of the drum body of the winding drum of the coiling machine according to claim 1, wherein the bushing is fixedly connected with the drum body in a welding mode.
  3. 3. A method of repairing wear in the bore of a coiler drum according to claim 1 or 2, wherein the bushing is subjected to a freezing treatment prior to assembly.
  4. 4. A method of repairing wear in the bore of a coiler drum according to claim 3, wherein the bushing is cooled to-70 ℃ to-80 ℃ by dry ice freezing prior to assembly.
  5. 5. The method of repairing wear in a drum bore of a coiler drum according to claim 1, wherein the fit interference of the bushing with the drum bore is >0.20mm.
  6. 6. The method of repairing wear in a drum bore of a coiler drum according to claim 1, wherein the bushing is a heat resistant stainless steel piece.
  7. 7. The method for repairing the inner hole abrasion of the winding drum body of the winding machine according to claim 2, wherein the material of the inlaid sleeve is heat-resistant stainless steel 2Cr13, and the welding rod used in the welding process is a stainless steel welding rod.
  8. 8. The method for repairing the inner hole of the drum body of the coiling machine according to claim 2, wherein the insert sleeve is welded by spot welding after being put in place, and the height of the welding leg is not less than 4mm.
  9. 9. The method of repairing wear in a coiler drum body according to claim 8, wherein the weld length is > 60% of the circumference.
  10. 10. The method of repairing wear in a bore of a coiler drum according to claim 1, wherein the inserts are three inserts arranged side by side.

Description

Method for repairing abrasion of inner hole of coiling block cylinder body of coiling block Technical Field The invention relates to a coiling machine coiling block cylinder repairing technology in metallurgical machinery, in particular to a coiling machine coiling block cylinder inner hole abrasion repairing method. Background After the coiling block of the coiling machine is used for a period of time, the inner hole of the cylinder body of the coiling block can generate a certain amount of abrasion, so that the expansion diameter of the coiling block changes and the coiling block jumps when rotating at a high speed. When the wall thickness abrasion loss of the drum body exceeds the allowable minimum value, the drum body cannot be repaired, and the whole drum body is scrapped. The coiling machine is a key device on a hot rolled strip steel production line, the winding drum is a core device of the coiling machine, and the quality of the winding drum state directly influences the production stability and the winding quality of strip steel. That is, after the coiling block drum body of the coiling machine is used for a period of time, the inner hole of the coiling block drum body is worn out due to the relative movement of the coiling block mandrel and the drum body, and the inner hole of the coiling block drum body is worn out by 1mm in 5-6 months. Abrasion of the inner hole inevitably causes the winding drum to jump when rotating, thereby affecting the coiling quality of the strip steel. Meanwhile, the dry oil lubrication pipeline inside the winding drum is easily blocked by the worn oxide of the drum body, so that the lubrication oil is not smoothly supplied, and the wear inside the winding drum is increased. Therefore, when the abrasion loss of the inner hole size of the drum body exceeds 305mm, the inner hole of the drum body must be repaired (the inner hole size of the standard drum body is 300 mm). The specific structure is shown in a winding drum structure layout of fig. 1, which illustrates components such as a winding drum reduction gearbox, a winding drum expansion and contraction oil cylinder, a measuring plate, a winding drum bearing seat, a winding drum assembly, a sector plate, an extension shaft, an outer support bearing and the like and interrelationships thereof. In the current treatment means, the restoration of the winding drum in China and abroad does not relate to the restoration of the inner hole of the winding drum body, but adopts a simple technology of directly milling the inner hole of the winding drum body. The method of directly performing spraying, overlaying, boring and the like on the inner hole of the drum body of the drum is adopted for repairing. Therefore, after the bore hole of the barrel body passes through the boring twice, the wall thickness of the barrel body of the barrel exceeds an allowable minimum value, so that the whole barrel body of the barrel is scrapped (the design size of the bore hole of the barrel body is phi 300mm, and when the bore hole diameter exceeds phi 307mm, the bore hole is pierced with a lubricating oil way of the barrel body wall of the barrel body of the barrel, so that the whole barrel body of the barrel is scrapped). That is, the existing reel body repairing means and technology cannot meet the use requirement of the existing hot rolling coiling machine reel, and no better and effective repairing technology exists at home and abroad at present, so that the service life of the reel and the purchase cost of spare parts are directly influenced by the reel body repairing technology. Disclosure of Invention The technical problem to be solved by the invention is to overcome the defects in the prior art, and provide the method for repairing the abrasion of the inner hole of the coiling block cylinder body of the coiling block, which can improve the recycling rate of the coiling block cylinder body and reduce the purchase cost of spare parts of the coiling block cylinder body. The technical problems to be solved by the method can be implemented by the following technical schemes. A method for repairing the abrasion of the inner hole of a coiling drum body of a coiling machine is characterized in that a replaceable inlay sleeve is assembled at the position of the inner hole of the coiling drum body, which is easy to abrade, and the inlay sleeve is in interference fit with the inner hole of the coiling drum body. Further, the inlay sleeve is fixedly connected with the drum body in a welding mode. Further, the insert is subjected to a freezing treatment prior to assembly. Preferably, the insert is cooled to-70 ℃ to-80 ℃ by dry ice freezing treatment before assembly. Further, the fit interference of the insert sleeve and the inner hole of the cylinder body is more than 0.20mm. Further, the insert sleeve is a heat-resistant stainless steel piece. Preferably, the material of the inlay sleeve is heat-resistant stainless steel 2Cr13, and the welding rod used