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CN-121989104-A - Production method and device for removing surface defects of wires and application of abrasive belt

CN121989104ACN 121989104 ACN121989104 ACN 121989104ACN-121989104-A

Abstract

The invention discloses a production method and a device for removing surface defects of wires and application of an abrasive belt, belonging to the technical field of wire processing in the metal product industry, wherein the method comprises the following steps: and (3) drawing the wire rods into an abrasive cloth grinding area for surface grinding after uncoiling, wherein the abrasive cloth grinding area is subjected to surface grinding treatment by adopting a closed annular abrasive belt rotating at a high speed to contact the wire rods, at least 3 sets of abrasive belts and corresponding matched devices are sequentially arranged in the closed abrasive belt grinding device, the abrasive belts are abrasive belts with composite granularity, and the linear speed range of the abrasive belts is 5-50 m/s. The tension range of the abrasive belt is 100N-300N. The abrasive belt is ensured to finish grinding of the surface defects of the wire rod within a limited time, meanwhile, grinding marks are controlled, ovality of the wire rod after grinding is ensured, the wire rod reprocessing production efficiency can be improved, and the product quality and market competitiveness of the wire rod reprocessing are improved.

Inventors

  • LIU LIU
  • JIANG YUEDONG
  • ZHANG JINLING
  • JIANG TIANYU
  • ZHU CHENYU
  • TENG LIHONG
  • ZHANG FENGQUAN

Assignees

  • 江苏集萃冶金技术研究院有限公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (8)

  1. 1. A production method and device for removing defects on the surface of a wire rod and the application of an abrasive belt, which are characterized in that the method comprises the following steps: And (3) drawing the wire rods into an abrasive cloth grinding area for surface grinding after uncoiling, wherein the abrasive cloth grinding area is subjected to surface grinding treatment by adopting a closed annular abrasive belt rotating at a high speed to contact the wire rods, at least 3 sets of abrasive belts and corresponding matched devices are sequentially arranged in the closed abrasive belt grinding device, the abrasive belts are abrasive belts with composite granularity, and the linear speed range of the abrasive belts is 5-50 m/s. The tension range of the abrasive belt is 100N-300N, so that the abrasive belt can finish grinding of the surface defects of the wires within a limited time, and the ovality of the abrasive cloth after the wires are ground can meet the quality requirement. .
  2. 2. The method for removing surface defects of wires according to claim 1, wherein the wires are drawn and axially moved into a closed belt grinding device, the wire feed speed ranges from 5m/min to 60m/min, the smaller the wire diameter is, the more the wire feed speed tends to the upper limit value of the speed range, and the larger the wire diameter is, the more the wire feed speed tends to the lower limit value of the speed range.
  3. 3. The closed abrasive belt grinding device according to claim 1, wherein at least 3 sets of abrasive belts and corresponding matched devices are sequentially arranged in the closed abrasive belt grinding device, and the abrasive belts and the corresponding matched devices conduct abrasive belt grinding treatment on the circumferential cambered surface of the wire rod surface.
  4. 4. The production method for removing surface defects of wires according to claim 1, wherein the linear speed of the abrasive belt ranges from 5m/s to 50m/s. The tension range of the abrasive belt is 100N-300N.
  5. 5. The belt and associated kit of claim 3, wherein the belt associated kit comprises a support wheel, a drive wheel, a tension wheel and a tension mechanism, the belt running around the support wheel, the drive wheel, the tension wheel and the tension mechanism, the drive wheel ensuring belt running speed, tension range of the belt of the tension wheel and tension mechanism.
  6. 6. The abrasive belt according to claim 5, wherein the abrasive belt is an abrasive belt with composite granularity, 2 abrasive areas are arranged in parallel along the long side direction of the abrasive belt, the abrasive grain size number of the abrasive area in the wire entering direction is 30-80 meshes, the larger the hardness and elastic modulus of the wire are, the smaller the selection number of the abrasive grain size number is, the larger the single abrasive particles are, and the grinding amount of the surface defects of the wire is ensured. The abrasive grain size of the second sanding area is 100-240 meshes, so that the plastic bulge generated in the first sanding area is ensured to be ground, and the depth of grinding marks in the first sanding area is reduced.
  7. 7. A sanding belt and associated mating device according to claim 3, characterized in that the mating devices of the sanding belt are arranged in sequence in the direction of wire paying-off operation, and that the sanding areas of the respective sanding belt against the wire surface do not overlap.
  8. 8. The use of an abrasive belt according to claim 5, characterized in that the use comprises the application of the abrasive belt to wire machining for finishing grinding of wire surface defects.

Description

Production method and device for removing surface defects of wires and application of abrasive belt Technical Field The invention belongs to the technical field of wire rod processing in the metal product industry, and particularly relates to a production method and device for removing surface defects of a wire rod and application of an abrasive belt. Background In the current standard of China, the hot-rolled round steel with the diameter of 5-26 mm is generally called a wire rod. Because the wire rods which need to be reprocessed are produced by adopting a multi-pass high-temperature rolling process, the defects of iron scales, pits, lugs, folds, cracks and the like are extremely easy to generate on the surface of the wire rods. These defects are very evident, see fig. 1. Still other microscopic defects (tens to hundreds of microns) into the wire matrix are covered with scale and require sampling under a microscope for observation, see fig. 2. For a coil of wire rod with the weight of 2.0t, under the condition of different diameters, the length is from several kilometers to tens of thousands of meters, and the condition of microscopic defect of omission is extremely easy to occur. If these microscopic defects are not found in time and inherit to the reprocessing process, they affect the mechanical properties and fatigue life of the steel wire product, and the effect of copper plating or zinc plating on the surface of the steel wire. Therefore, the current national standards require that the surface microscopic defect depth (or height) of the spring steel wire and the cord steel wire is not more than 0.10mm, otherwise the wire is broken during drawing or stranding. Production practice proves that scratch of more than 0.10mm on the surface of the cold heading steel wire often causes 1/2 cold heading cracking of the cold heading steel wire, 1/3 cold heading is ensured to be qualified, and the local scratch depth of the surface of the wire is required not to exceed 0.07mm. Currently, common techniques for surface treatment of steel wires include shot blasting, bending roll, steel brush, grinding wheel and belt rust removal. The techniques are all surface rust removing or polishing techniques, and can well remove iron scales and rust on the surface of the wire rod. However, existing surface rust removal or polishing techniques are not removable for defects in the steel matrix, such as bumps, pits and cracks. Therefore, how to remove microscopic defects in the steel matrix improves the product quality. Meanwhile, the production is smooth and the cost is controlled, and the problem that wire rod reprocessing enterprises have to face is solved. Abrasive belts are special forms of multi-blade, multi-bladed cutting tools whose cutting function is mainly accomplished by abrasive particles adhering to a substrate. The abrasive grain consists of abrasive, adhesive and base material, and has raised long diameter and smooth surface, and the adhesive and the base material maintain the flexibility and elasticity. The abrasive belt cutting process comprises three stages of sliding and wiping, plowing and cutting. Sliding-the abrasive particles cause elastic and plastic deformation of the non-cutting material on the workpiece. The plow comprises a plow body, abrasive particles and a cutter, wherein the abrasive particles cause plastic flow of workpiece materials, so that the materials are extruded from the front and two sides below the abrasive particles in a extrusion type movement, and a small amount of materials are cut off. Cutting, in which a fracture is generated in front of the sliding abrasive to form chips, has extremely rapid cutting rate. The schematic drawing (see figure 3) of the grinding process of a single abrasive particle can be seen that elastic recovery is generated at the top end of the abrasive particle, abrasive dust is generated at the front end of the abrasive particle, and plastic bulge is generated at both sides of the rear end of the abrasive particle, and the grinding depth is increased. Because the wire is cylindrical in shape, the belt sander wire is typically "in flexible contact," see fig. 4. If the microscopic defects on the surface of the wire rod are polished and smoothed by an abrasive belt on the wire rod reprocessing production line, there are 3 problems to be solved: (1) The hardness of the wire, the grinding pressure and the grinding speed of the abrasive belt are parameters of an important grinding process. Meanwhile, on the wire rod reprocessing production line, the wire rod moves at a speed matched with that of the front and back production processes. The essence of various grinding processes and grinding phenomena must be revealed through research, and the optimal grinding process on the production line is found out, so that microscopic defects can be removed under the condition that wires on the reprocessing production line run, unnecessary metal loss is reduced, and production e