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CN-118061615-B - Isolation pad and manufacturing method thereof

CN118061615BCN 118061615 BCN118061615 BCN 118061615BCN-118061615-B

Abstract

The invention provides a spacer and a manufacturing method thereof. The isolating pad is arranged between an aluminum roll and a material frame for bearing the aluminum roll in the processing process of the aluminum roll so as to isolate the aluminum roll from the material frame, wherein the isolating pad is of a multi-layer structure, each layer is made of an aluminum alloy material, and comprises at least two outer layers, namely a first outer layer at the side contacted with the material frame and a second outer layer at the side contacted with the aluminum roll. The isolation pad can solve the problem of annealing and stamping of the outer layer of the aluminum coil caused by direct contact between the aluminum coil and the material frame, is suitable for aluminum coils with various weights and sizes, has reliable strength and high temperature resistance, and can not fail under the condition of repeatedly annealing and cooling along with the entering and exiting of the aluminum coil into and out of the annealing furnace.

Inventors

  • CHEN PAN
  • WANG SONG
  • ZENG DAN
  • XUE YUNTAO
  • SUN CHUNLEI
  • XU BO

Assignees

  • 奥科宁克（昆山）铝业有限公司

Dates

Publication Date
20260505
Application Date
20221123

Claims (20)

  1. 1. A spacer for being disposed between an aluminum roll and a work frame for carrying the aluminum roll during processing of the aluminum roll to separate the aluminum roll and the work frame, wherein the spacer has a multi-layered structure, each layer being made of an aluminum alloy material, the spacer comprising at least two outer layers, a first outer layer on a side contacting the work frame and a second outer layer on a side contacting the aluminum roll; Wherein the insulation pad has a shape curved towards the work frame relative to a horizontal surface that matches the cylindrical shape of the aluminum roll, and the insulation pad matches a bearing surface of the work frame that engages the insulation pad; wherein the insulation pad further comprises a core layer between the outer layers; The hardness of the core layer is greater than the hardness of the first outer layer and the second outer layer, and the hardness of the second outer layer is closer to the hardness of the aluminum roll and less than or equal to the hardness of the aluminum roll; And/or the strength of the core layer is greater than the strength of the first outer layer and the second outer layer, wherein the strength of the second outer layer is closer to the strength of the aluminum roll.
  2. 2. The insulation blanket of claim 1, wherein the aluminum coil process comprises an annealing operation.
  3. 3. The insulation mat of claim 1, wherein the first outer layer and the core layer comprise elemental magnesium and/or elemental silicon and the second outer layer does not comprise elemental magnesium.
  4. 4. The spacer of claim 1, wherein the spacer has a thickness of 15-20mm, a width of 1300-1500mm, a length of 1700-1950mm, and a bend angle of 16-18 degrees relative to a horizontal surface.
  5. 5. The insulation mat of claim 1, wherein the first outer layer has a thickness of 8% -12% of the total thickness of the insulation mat, the second outer layer has a thickness of 17% -23% of the total thickness of the insulation mat, and the remainder has a thickness of the core layer.
  6. 6. A method for manufacturing a spacer as claimed in any one of claims 1 to 5, characterized in that the method comprises the steps of: Step (i) manufacturing a first outer layer, a second outer layer, and a core layer between the first outer layer and the second outer layer, respectively; Step (ii) of welding, wherein the first outer layer, the second outer layer and the core layer manufactured in the step (i) are overlapped along the thickness direction and welded along the length direction to form a welded body; step (iii) hot rolling, namely hot rolling the welded body obtained by welding to form the isolation pad; And (iv) annealing, namely placing the isolation pad obtained through hot rolling in the step (iii) on the material frame, placing the aluminum coil on the isolation pad, loading the aluminum coil, the material frame and the isolation pad between the aluminum coil and the material frame into an annealing furnace together for at least one annealing operation, wherein after at least one annealing operation, the isolation pad is in a bent shape relative to a horizontal surface and is matched with a bearing surface of the material frame, which is jointed with the isolation pad.
  7. 7. The method of claim 6, wherein in step (i), the steps of fabricating the first outer layer, the second outer layer, and the core layer comprise: melting, namely melting raw materials to form aluminum alloy liquid; casting, namely casting the molten aluminum alloy liquid to form an aluminum alloy block; milling the surface, milling the surface of the cast aluminum alloy block to obtain the aluminum alloy block with the milled surface, and Wherein the step of manufacturing the first outer layer and the second outer layer further comprises: And hot rolling, namely hot rolling the aluminum alloy blocks with the milled surfaces to obtain the aluminum alloy plates.
  8. 8. The method according to claim 6, wherein in step (ii), argon arc welding is performed continuously in a longitudinal direction.
  9. 9. The method according to claim 6, wherein step (iii) comprises preheating the welded body obtained by welding to a temperature range of 470-480 ℃ and after 2-5 hours of heat preservation, rolling the welded body into a spacer having a length of 1700-1950mm, a width of 1300-1500mm and a thickness of 15-20mm at a rolling speed of 80-120mm/min in the length direction.
  10. 10. The method according to claim 6, wherein the annealing temperature in step (iv) is 200-550 ℃.
  11. 11. The method according to claim 7, wherein in the step (i), the melting step of manufacturing the first outer layer comprises the steps of placing crystalline silicon at the bottom of a melting furnace, adding an original aluminum ingot, igniting to start melting, adding a magnesium ingot when the temperature of the aluminum liquid reaches a temperature range of 750-760 ℃ and stirring uniformly to obtain an aluminum alloy liquid.
  12. 12. The method according to claim 7, wherein in the step (i), the casting step of manufacturing the first outer layer includes maintaining the temperature of the molten aluminum alloy liquid in a temperature range of 675 to 685 ℃ and performing a cooling treatment with cooling water having a flow rate of 110 to 130m 3 /h, and casting the aluminum alloy liquid into an aluminum alloy block having a length of 5200mm, a width of 1270mm, and a thickness of 415mm at a casting speed of 45 to 47 mm/min.
  13. 13. The method according to claim 7, wherein in the step (i), the face milling step of manufacturing the first outer layer includes milling off the both sides in the width direction of the cast aluminum alloy block by 8-10mm wide aluminum alloy strips, respectively.
  14. 14. The method according to claim 7, wherein in the step (i), the hot rolling step of manufacturing the first outer layer includes preheating the milled aluminum alloy block to a temperature range of 450-470 ℃, and after maintaining the temperature for 2-5 hours, rolling the milled aluminum alloy block into an aluminum alloy plate having a length of 4800-5000mm, a width of 1280-1320mm, and a thickness of 58-62mm at a rolling speed of 140-150mm/min in a length direction.
  15. 15. The method according to claim 7, wherein in the step (i), the melting step of manufacturing the second outer layer comprises adding an original aluminum ingot into a melting furnace, starting melting by ignition, adding iron powder, copper wire and aluminum-manganese alloy when the temperature reaches a temperature range of 750-760 ℃ and stirring uniformly to obtain an aluminum alloy liquid.
  16. 16. The method according to claim 7, wherein in the step (i), the casting step of manufacturing the second outer layer includes maintaining the temperature of the molten aluminum alloy liquid within a temperature range of 690-700 ℃ and performing a cooling treatment with cooling water having a flow rate of 100-120m 3 /h, and casting the aluminum alloy liquid into an aluminum alloy block having a length of 5200mm, a width of 1270mm, and a thickness of 415mm at a casting speed of 41-43 mm/min.
  17. 17. The method according to claim 7, wherein in the step (i), the face milling step of manufacturing the second outer layer includes milling off aluminum alloy strips of 8-10mm width on both sides in the width direction of the cast aluminum alloy block, respectively.
  18. 18. The method according to claim 7, wherein in the step (i), the hot rolling step of manufacturing the second outer layer includes preheating the milled aluminum alloy block to a temperature range of 480-500 ℃, and after heat preservation for 2-5 hours, rolling the milled aluminum alloy block into an aluminum alloy plate having a length of 4800-5000mm, a width of 1280-1320mm, and a thickness of 98-102mm at a rolling speed of 160-170mm/min in a length direction.
  19. 19. The method according to claim 7, wherein in the step (i), the melting step of manufacturing the core layer comprises adding an original aluminum ingot into a melting furnace, igniting to start melting, and adding iron powder, magnesium ingot, copper wire and aluminum manganese alloy and stirring uniformly when the temperature reaches a temperature range of 750-760 ℃ to obtain an aluminum alloy liquid.
  20. 20. The method according to claim 7, wherein in the step (i), the casting step of manufacturing the core layer comprises maintaining the temperature of the molten aluminum alloy liquid in a temperature range of 700 to 710 ℃ and performing cooling treatment with cooling water having a flow rate of 90 to 100m 3 /h, and casting the aluminum alloy liquid into an aluminum alloy block having a length of 5200mm, a width of 1320mm, and a thickness of 310mm at a casting speed of 38 to 40 mm/min.

Description

Isolation pad and manufacturing method thereof Technical Field The invention relates to the technical field of aluminum coil processing and manufacturing, in particular to a spacer for an aluminum coil processing process and a manufacturing method thereof. Background In the aluminum coil manufacturing industry, in some cases, an aluminum strip is wound on a core sleeve to form an aluminum coil, which can be suspended from a support by the core sleeve for subsequent processing steps, such as an annealing step. However, in other cases, a core sleeve (referred to as a "sleeveless aluminum coil") is not used in the winding process of the aluminum ribbon, and when such a sleeveless aluminum coil is annealed or the like, the aluminum coil cannot be placed by hanging the core sleeve on a stand, but only the aluminum coil can be placed directly on a work rest. The material rack is usually iron. When the sleeve-free aluminum coil is directly placed on the material rack for annealing operation, the aluminum coil becomes soft, and the hardness and strength of the aluminum coil are far lower than those of the iron material rack. Therefore, under the action of large dead weight, the rib part where the aluminum coil is contacted with the iron material frame is easy to be stamped, so that the aluminum coil on the outer layer needs to be stripped and scrapped. Under the influence of different aluminum roll thickness, weight, outer ring radians and other conditions, stamping can even go deep into more than ten layers of aluminum rolls, so that more than ten layers of aluminum rolls need to be stripped, which causes serious material loss. To address this problem, it is common in the art to provide a spacer structure on the frame to prevent the outer layer of the aluminum roll from directly contacting the upper surface of the iron frame. The conventional isolation structures have iron wire nets or rubber pads, but the structures have the respective disadvantages that the iron wire nets are generally arranged on the material frame in a manner that two side edges are connected to the edges of the material frame and the middle part of the iron wire nets are suspended, so that when the dead weight of an aluminum coil is large, the installation parts of the iron wire nets are easy to break, and the rubber pads cannot be used in annealing operation due to poor high temperature resistance. Accordingly, there is a need to provide a reliable and high temperature resistant insulation pad for use as an insulation structure between a rack and an aluminum coil to address the problem of annealing imprinting of the outer layer of the aluminum coil. Disclosure of Invention The invention aims to solve the problems in the prior art, and provides a high-temperature-resistant isolation pad with reliable strength, which is arranged between a material frame and an aluminum coil, so as to solve the problem of annealing and embossing of an outer layer of the aluminum coil caused by direct contact between the aluminum coil and the material frame, simultaneously adapt to aluminum coils with various weights and sizes, and ensure that the isolation pad cannot fail under the condition of repeatedly annealing and cooling along with the entering and exiting of the aluminum coil into an annealing furnace. In one aspect, the present invention provides a spacer for being disposed between an aluminum roll and a work frame for carrying the aluminum roll during processing of the aluminum roll to separate the aluminum roll and the work frame, wherein the spacer is of a multi-layer structure, each layer being made of an aluminum alloy material, the spacer comprising at least two outer layers, a first outer layer on a side in contact with the work frame and a second outer layer on a side in contact with the aluminum roll. According to a preferred embodiment of the invention, the aluminium coil machining process comprises an annealing operation. According to a preferred embodiment of the invention, the insulation mat further comprises a core layer between the outer layers. According to a preferred embodiment of the invention, the hardness of the core layer is greater than the hardness of the first and second outer layers, and the hardness of the second outer layer is closer to the hardness of the aluminum roll and less than or equal to the hardness of the aluminum roll. According to a preferred embodiment of the invention, the strength of the core layer is greater than the strength of the first outer layer and the second outer layer, wherein the strength of the second outer layer is closer to the strength of the aluminium coil. According to a preferred embodiment of the invention, the first outer layer and the core layer comprise magnesium element and/or silicon element, and the second outer layer does not comprise magnesium element. According to a preferred embodiment of the invention, the first outer layer is made of an aluminium alloy material of type 4004, the s