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CN-122007992-A - Method for repairing and grinding surface defects of steel plate for high-surface engineering machinery

CN122007992ACN 122007992 ACN122007992 ACN 122007992ACN-122007992-A

Abstract

The invention discloses a method for repairing and grinding surface defects of a steel plate for high-surface engineering machinery, which relates to the technical field of repairing surface defects of metal materials and comprises the steps of positioning the defect positions of the surface of the steel plate and determining the defect types and the defect sizes; the method comprises the steps of determining a corresponding grinding area based on the defect type and the defect size of each defect, sequentially carrying out rough grinding treatment and fine grinding treatment on the grinding area corresponding to each defect, and carrying out polishing treatment on the grinding area corresponding to each defect. The invention realizes the complete elimination of defects, smooth transition between the grinding area and the steel plate body and smooth surface, and the difficult resolution of grinding marks by naked eyes through the specific grinding area control and grading progressive grinding process, saves the high-value high-surface defect steel plate, and greatly reduces the production cost of enterprises.

Inventors

  • HUANG XINSHENG
  • MA YONG
  • Su Haoshi
  • YAO JIAWEI

Assignees

  • 南京钢铁股份有限公司

Dates

Publication Date
20260512
Application Date
20260313

Claims (9)

  1. 1. A method for repairing and grinding surface defects of a steel plate for high-surface engineering machinery is characterized by comprising the following steps: positioning the defect position of the surface of the steel plate, and determining the defect type and the defect size; determining a corresponding coping zone based on the defect type and defect size of each defect; sequentially carrying out rough grinding treatment and fine grinding treatment on the grinding areas corresponding to each defect; Polishing the coping area corresponding to each defect.
  2. 2. The method for repairing surface defects of steel sheet for high surface engineering machinery according to claim 1, wherein the defect type comprises pitting defects and pit defects, and the defect size comprises defect depth, defect length, defect width and defect diameter.
  3. 3. The method for repairing surface defects of steel sheet for high surface engineering machinery according to claim 2, wherein said determining a corresponding repaired area based on a defect type and a defect size of each defect comprises: calculating the area of each defect; And uniformly and outwards dispersing the defect edge by taking the defect area as the center of the coping area to form the coping area with the area 15-20 times of that of the defect area.
  4. 4. The method for repairing and polishing surface defects of steel sheet for high surface engineering machinery according to claim 3, wherein the transition gradient between the edge of each defect corresponding to the polished area and the surface of the steel sheet is 5-10 degrees.
  5. 5. The method for repairing the surface defects of the steel plate for the high surface engineering machine according to claim 1, wherein the step of sequentially performing rough grinding treatment and fine grinding treatment on the repaired area corresponding to each defect comprises the following steps: roughly grinding the grinding area by adopting a 120-mesh grinding sheet, and controlling the grinding equipment to form 5-10 degrees with the surface of the steel plate; and (3) finely grinding the grinding area by adopting a 240-mesh polishing sheet, and controlling the grinding equipment to form an angle of 5-10 degrees with the surface of the steel plate.
  6. 6. The method for repairing surface defects of a steel plate for a high surface engineering machine as claimed in claim 5, wherein the polishing speed of the rough polishing is controlled to 10000 revolutions per minute, and the polishing pressure is controlled to 20-30N.
  7. 7. The method for repairing surface defects of a steel plate for a high surface engineering machine as claimed in claim 5, wherein the polishing rotational speed of the fine polishing is controlled to 8000 revolutions/min, and the polishing pressure is controlled to 15-25N.
  8. 8. The method for repairing surface defects of a steel sheet for a high surface engineering machine according to claim 1, wherein the polishing of the repaired area corresponding to each defect comprises: The polished area was polished with 800 mesh sandpaper.
  9. 9. The method for repairing surface defects of a steel plate for a high surface engineering machine according to claim 8, wherein the polishing pressure is 10-15N and the polishing time is 3-5 min.

Description

Method for repairing and grinding surface defects of steel plate for high-surface engineering machinery Technical Field The invention relates to the technical field of repairing surface defects of metal materials, in particular to a method for repairing and grinding surface defects of a steel plate for high-surface engineering machinery. Background In the production, processing and use processes of the steel plate for the high-surface engineering machinery, the surface is easy to generate common surface defects such as pitting surfaces, pitting pits and the like, and most of the defects are surface local concave defects, so that the strength of the steel plate body is not affected, but the high surface flatness and the smoothness of the steel plate are seriously damaged, and the steel plate cannot meet the severe requirements of engineering machinery clients. The engineering machinery clients of the steel plate have extremely high requirements on the surface evenness and the smoothness of the steel plate, belong to the scene of high surface requirements, do not allow the defect to be treated by adopting a conventional polishing mode, and the conventional polishing is mostly only aimed at locally polishing the defect point, so that obvious steps and polishing marks are easily formed between the defect and the steel plate body, and the high surface appearance and the use requirements of the clients cannot be met. If the steel plate with surface defects for high-surface engineering machinery is not saved, direct waste judgment or improvement treatment can cause a great amount of material waste and increase in production cost, and large economic loss is brought to enterprises (the scrapped loss of a single 9 mm-thick Q1100 high-surface steel plate can reach 1000-2000 yuan/ton), in the prior art, the related polishing process is focused on the improvement of the finish degree of a stainless steel medium plate (such as semi-wet type and full-wet type grading polishing, and the focus is on the optimization of efficiency and surface roughness), or the polishing-free production of an extra-thick plate (the focus is on the reduction of polishing amount), the polishing method capable of eliminating the surface defects such as pitting pits, having no obvious polishing marks and having gentle transition with a body is lacked, and the existing sheet metal polishing process (such as multi-stage sand paper polishing) is only suitable for removing burrs and oxide layers and is not designed aiming at the strict appearance requirements of the steel plate for the high-surface engineering machinery, and the pain points of the industry cannot be solved. Disclosure of Invention The invention aims to solve the technical problem of overcoming the defects of the prior art and providing a method for repairing and grinding the surface defects of a steel plate for high-surface engineering machinery. In order to solve the technical problems, the technical scheme of the invention is as follows: a method for repairing and grinding surface defects of a steel plate for high-surface engineering machinery comprises the following steps: positioning the defect position of the surface of the steel plate, and determining the defect type and the defect size; determining a corresponding coping zone based on the defect type and defect size of each defect; sequentially carrying out rough grinding treatment and fine grinding treatment on the grinding areas corresponding to each defect; Polishing the coping area corresponding to each defect. As a preferable scheme of the method for repairing and grinding the surface defects of the steel plate for the high-surface engineering machinery, the defect type comprises pitting defects and pit defects, and the defect size comprises defect depth, defect length, defect width and defect diameter. The method for repairing the surface defects of the steel plate for the high-surface engineering machinery comprises the following steps of: calculating the area of each defect; And uniformly and outwards dispersing the defect edge by taking the defect area as the center of the coping area to form the coping area with the area 15-20 times of that of the defect area. As a preferable scheme of the method for repairing and grinding the surface defects of the steel plate for the high-surface engineering machinery, the transition gradient between the edge of each defect corresponding to the repairing and grinding area and the surface of the steel plate is 5-10 degrees. The method for repairing and grinding the surface defects of the steel plate for the high-surface engineering machinery comprises the following steps of: roughly grinding the grinding area by adopting a 120-mesh grinding sheet, and controlling the grinding equipment to form 5-10 degrees with the surface of the steel plate; and (3) finely grinding the grinding area by adopting a 240-mesh polishing sheet, and controlling the grinding equipment to form an angle of