A nonferrous metal composite strip rolling process

Abstract

The present invention relates to the technical field of non-ferrous metal composite plate and strip preparation, and specifically to a non-ferrous metal composite plate and strip rolling process, comprising: selecting a first metal strip and a second metal strip, using an impurity removal component to remove the oxide layer on the surface of the metal strips, and simultaneously eliminating the internal stress in the metal strip production process; cleaning the metal strips after impurities removal, and then pre-pressing them to obtain a composite slab; rolling the composite slab in multiple passes, with the first pass being performed using a rolling mill with double corrugated rollers; the second pass being performed using a rolling mill with double straight rollers; and finally performing trimming, heat treatment, straightening, and segmentation. The present invention reduces the difficulty of rolling and improves the rolling effect by removing the oxide layer and internal stress on the surface of the metal strips before rolling, while also reducing the subsequent heat treatment time and heat treatment energy consumption; the cleaning and pre-pressing operations are both performed in an inert gas environment, reducing secondary oxidation on the surface of the metal strips and improving the rolling effect.

Description

Technical Field

[0001] The present invention relates to the technical field of nonferrous metal composite plate and strip preparation, and in particular to a nonferrous metal composite plate and strip rolling process. Background Art

[0002] Metal composite panels combine the advantages of each component metal, possessing physical and chemical properties not possessed by any single metal. They are widely used in aerospace, defense, transportation, and equipment manufacturing. The widespread application of metal composite panels is crucial for addressing the current challenges of energy and industrial structure.

[0003] Currently, the main methods for preparing metal composite plates include rolling, extrusion, explosion, and diffusion welding. Rolling, one of the most widely used methods, involves subjecting the metal sheets to the intense rolling pressure of a rolling mill to break the coating on the contact surface of the dissimilar metals. This creates plastic flow across the entire contact surface, allowing fresh base metal extruded from the surface cracks to come into close contact, leading to microscopic atomic reactions and ultimately forming a strong metallurgical bond at the interface between the metal layers. Compared to other methods, rolling offers the advantages of low pollution, stable operation, and good continuity in mass production.

[0004] Currently, before non-ferrous metals are rolled, the metal bonding surface needs to be polished to remove the metal oxides, because the metal oxide layer will affect the metal bonding strength after rolling and cause interlayer cracking. In the existing technology, a sanding machine or a metal brush roller is usually used to polish the metal surface. Since most non-ferrous metals have strong reducing properties and are easily oxidized by air, an oxide layer is easily generated on the surface after polishing and before rolling. In addition, the raw materials of metal plates and strips are generally coiled, which is convenient for transportation. After uncoiling, the internal stress of the metal is easy to cause cracking during rolling, which places high demands on the rolling mill, and annealing treatment is required as soon as possible after rolling to eliminate stress. Annealing consumes a lot of energy. Summary of the Invention

[0005] In order to make up for the above deficiencies, the present invention provides a non-ferrous metal composite plate and strip rolling process.

[0006] The technical solution of the present invention is:

[0007] A nonferrous metal composite plate and strip rolling process, comprising:

[0008] S1: Selecting a first metal strip and a second metal strip, wherein the second metal strip has a lower deformation resistance than the first metal strip, and feeding the first metal strip and the second metal strip into an impurity removal assembly to remove oxide layers on the surfaces of the first metal strip and the second metal strip;

[0009] The impurity removal component includes an impurity removal box, which is provided with several feed ports and several first discharge ports. Several feeding rollers are provided on the left and right sides of the impurity removal box, and the feeding rollers are used to drive the first metal strip and the second metal strip to enter from the feed port and pass through the first discharge port.

[0010] S2: The first metal strip and the second metal strip after impurities are sent to a cleaning assembly to remove oxide layer debris attached to the surfaces of the first metal strip and the second metal strip in an inert gas environment;

[0011] The cleaning assembly includes a cleaning pipe, which is fixedly mounted on one side of the first discharge port of the impurity removal box. A second discharge port is provided at the tail end of the cleaning pipe. A third isolation brush is provided in the second discharge port. The first metal belt and the second metal belt pass through the second discharge port.

[0012] The cleaning assembly is provided with a first guide roller and a second guide roller, and the first metal belt is close to the second metal belt after passing around the first guide roller and the second guide roller;

[0013] An air jet assembly is provided between the first guide roller and the second guide roller and between the first metal strip and the second metal strip, and is used to blow air toward the opposing surfaces of the first metal strip and the second metal strip to remove attached impurities. The air jet assembly uses an inert gas as a working gas.

[0014] S3: The cleaned first and second metal strips are fed into a pre-pressing assembly, and stacked in an inert gas environment according to the principle of soft in the middle and hard on both sides for preliminary fixation to obtain a composite slab;

[0015] S4: The composite slab is rolled in the first pass to obtain a corrugated composite slab. The first pass is performed using a rolling mill with double corrugated rollers. The upper and lower surfaces of the corrugated composite slab are corrugated surfaces. The bonding surface of the three metal plates of the corrugated composite slab is also corrugated. The reduction rate of the first pass is 10%-65%.

[0016] S5: The corrugated composite slab is rolled in the second pass to obtain a flat composite plate. The second pass is performed using a rolling mill with double flat rollers. The upper and lower surfaces of the flat composite plate are flat, and the bonding surface of the three metal plates of the flat composite plate is a corrugated surface. The reduction rate of the second pass is 30%-60%.

[0017] S6: The flat composite panels are trimmed, heat treated, straightened and segmented to obtain finished products.

[0018] Preferably, a first isolation brush is provided inside the feed port, and a second isolation brush is provided inside the first discharge port, and the first isolation brush and the second isolation brush are in contact with upper and lower sides of the first metal belt and the second metal belt.

[0019] Preferably, a plurality of shot blasting assemblies are provided in the impurity removal box and between the first metal belt and the second metal belt. The shot blasting assemblies are used to remove the oxide layer on the opposite surfaces of the first metal belt and the second metal belt. The shot blasting assemblies use inert gas as the working gas.

[0020] Preferably, a first brush roller is provided on the right side of the second guide roller and between the first metal belt and the second metal belt, and the first brush roller is used to remove remaining impurities on the opposite surfaces of the first metal belt and the second metal belt.

[0021] Preferably, the pre-pressing assembly includes a pre-pressing bin, which is fixedly mounted at the tail end of the cleaning tube. A third discharge port is provided at the tail end of the pre-pressing bin, and a fourth isolation brush is provided in the third discharge port.

[0022] Preferably, a first pre-pressing roller and a second pre-pressing roller are provided on the left and right sides of the pre-pressing bin near the fourth isolation brush, and the first pre-pressing roller and the second pre-pressing roller are used to press and combine the first metal strip and the second metal strip into a composite slab.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention provides an impurity removal component and utilizes a shot peening component to remove the oxide layer on the surface of the first metal strip and the second metal strip by shot peening. At the same time, shot peening can eliminate the residual stress of the first metal strip and the second metal strip, thereby improving the rolling effect, reducing the subsequent annealing time, and reducing energy consumption. In addition, the use of inert gas as the working gas can reduce the secondary oxidation of oxygen on the raw material surface.

[0025] 2. By setting up a cleaning component, using the air blowing component and the first brush roller to work, the residual oxide powder on the surface of the metal strip is cleaned before the metal strip is pre-pressed, thereby improving the surface cleanliness. At the same time, using inert gas as the working gas can prevent the metal strip from oxidizing before entering the pre-pressing process, thereby improving the rolling quality;

[0026] 3. By setting up a pre-pressing component and connecting the pre-pressing pipe and the cleaning pipe, inert gas can enter the pre-pressing pipe from the cleaning pipe to ensure that the metal strip is in an inert gas environment before bonding, reducing the formation of the oxide layer, and using the first pre-pressing roller and the second pre-pressing roller to fix the metal strip. Before the metal strip is rolled, the oxidation of the bonding surface by air is reduced, the rolling effect is improved, and the requirements for the rolling mill are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the impurity removal component in the present invention;

[0029] Figure 3 This is a schematic diagram of the cleaning component structure of the present invention;

[0030] Figure 4 Schematic diagram of the structure of the pre-pressing component in the present invention;

[0031] Figure 5 Schematic diagram of the first rolling process in the present invention;

[0032] Figure 6 Schematic diagram of the second rolling process in the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the corrugated composite slab in the present invention;

[0034] Figure 8 Schematic diagram of the structure of the straight composite plate strip in the present invention.

[0035] The meanings of the punctuation marks in the figure are:

[0036] 1. First metal belt; 2. Second metal belt;

[0037] 3. Debris removal assembly; 31. Debris removal box; 32. Feed port; 33. First discharge port; 34. First isolation brush; 35. Second isolation brush; 36. Feed roller; 37. Spray pipe; 38. Nozzle; 39. Pad;

[0038] 4. Cleaning assembly; 41. Cleaning pipe; 42. Second discharge port; 43. Third isolation brush; 44. First guide roller; 45. Second guide roller; 46. Air duct; 47. Air nozzle; 48. Third feed roller; 49. First brush roller;

[0039] 5. Pre-pressing assembly; 51. Pre-pressing bin; 52. Third discharge port; 53. Fourth isolation brush; 54. Third guide roller; 55. First pre-pressing roller; 56. Correction roller; 57. Second pre-pressing roller;

[0040] 6. Composite slab; 7. Corrugated composite slab; 8. Straight composite plate; 9. Corrugated roller; 10. Straight roller. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] The present invention describes the above technical solution in detail through the following embodiments:

[0044] Example 1:

[0045] Refer to the attached Figure 1-8 , a nonferrous metal composite plate and strip rolling process, comprising:

[0046] S1: Oxide layer treatment: A first metal strip 1 and a second metal strip 2 are selected, wherein the second metal strip 2 has a lower deformation resistance than the first metal strip 1, and the first metal strip 1 and the second metal strip 2 are fed into an impurity removal assembly 3 to remove the oxide layers on the surfaces of the first metal strip 1 and the second metal strip 2;

[0047] The first metal strip 1 and the second metal strip 2 are rolled non-ferrous metal strips.

[0048] The impurity removal component 3 includes a impurity removal box 31, which is provided with several feed ports 32 and several first discharge ports 33. Several feed rollers 36 are provided on the left and right sides of the impurity removal box 31. The feed rollers 36 are used to drive the first metal strip 1 and the second metal strip 2 to enter from the feed port 32 and pass through the first discharge port 33.

[0049] The dust removal box 31 is a metal box, and the feed roller 36 is rotatably connected to the dust removal box 31 via a bearing. The feed roller 36 is a rubber roller, clamping the first metal strip 1 and the second metal strip 2 from the top and bottom. The motor drives the first metal strip 1 and the second metal strip 2. It should be noted that the feed roller 36 should be able to adjust up and down to accommodate the different thicknesses of the first metal strip 1 and the second metal strip 2.

[0050] A first isolation brush 34 is provided inside the feed port 32 , and a second isolation brush 35 is fixedly installed inside the first discharge port 33 . The first isolation brush 34 and the second isolation brush 35 are in contact with the upper and lower sides of the first metal strip 1 and the second metal strip 2 .

[0051] The first isolation brush 34 and the second isolation brush 35 can be common plastic brushes, which are fixed to the feed port 32 and the first discharge port 33 by screws, which can reduce the exchange of materials inside and outside the impurity removal box 31. At the same time, the surfaces of the first metal strip 1 and the second metal strip 2 are preliminarily cleaned.

[0052] Several shot blasting assemblies are provided in the impurity removal box 31 and between the first metal belt 1 and the second metal belt 2. The shot blasting assemblies are used to spray and remove the oxide layer on the opposite surfaces of the first metal belt 1 and the second metal belt 2. The shot blasting assemblies use inert gas as the working gas.

[0053] The shot blasting assembly includes a nozzle 37, and a nozzle 38 is threadedly mounted on the end of the nozzle 37. The nozzle 38 is directed toward the first metal strip 1 and the second metal strip 2.

[0054] The bottom of the impurity removal box 31 can be filled with shot blasting pellets. The type of pellets is selected based on the type of the first metal strip 1 and the second metal strip 2. Driven by the inert gas, the pellets impact the surfaces of the first metal strip 1 and the second metal strip 2, removing the protective layer and relieving stress on the first metal strip 1 and the second metal strip 2.

[0055] A backing plate 39 is welded inside the debris removal box 31 . The backing plate 39 is located on the side of the first metal strip 1 away from the shot peening assembly to prevent the first metal strip 1 from bending due to shot peening.

[0056] S2: Surface cleaning: The first metal strip 1 and the second metal strip 2 after impurities removal are fed into the cleaning assembly 4 to remove oxide layer debris attached to the surfaces of the first metal strip 1 and the second metal strip 2 in an inert gas environment;

[0057] The cleaning assembly 4 includes a cleaning pipe 41, which is fixedly installed on one side of the first discharge port 33 of the impurity removal box 31 by bolts. A second discharge port 42 is provided at the tail end of the cleaning pipe 41, and a third isolation brush 43 is fixedly installed in the second discharge port 42. The first metal strip 1 and the second metal strip 2 pass through the second discharge port 42.

[0058] After being cleaned of impurities, the first metal strip 1 and the second metal strip 2 directly enter the cleaning pipe 41 .

[0059] A first guide roller 44 and a second guide roller 45 are rotatably mounted in the cleaning assembly 4 via bearings. The first metal belt 1 passes around the first guide roller 44 and the second guide roller 45 and approaches the second metal belt 2 .

[0060] The second metal belt 2 is rotatably mounted with third feed rollers 48 on both sides. The third feed rollers 48 are steel rollers and are driven by a motor to drive the second metal belt 2 toward the second discharge port 42 and prevent the second metal belt 2 from falling due to its own weight.

[0061] The distance between the two third feeding rollers 48 is adjustable.

[0062] A jet assembly is provided between the first guide roller 44 and the second guide roller 45 and between the first metal belt 1 and the second metal belt 2. The jet assembly is used to blow air toward the opposite surfaces of the first metal belt 1 and the second metal belt 2 to remove attached impurities. The jet assembly uses inert gas as the working gas.

[0063] The air injection assembly includes an air duct 46, which curves toward the surface of the first metal strip 1 and the second metal strip 2. A nozzle 47 is threadedly mounted on the end of the air duct 46. The nozzle 47 is a duckbill nozzle. When inert gas is introduced into the air duct 46, the nozzle 47 can blow away oxide impurities adhering to the surfaces of the first and second metal strips 1 and 2. This ensures that the cleaning tube 41 is filled with inert gas.

[0064] A first brush roller 49 is rotatably mounted on the right side of the second guide roller 45 and located between the first metal belt 1 and the second metal belt 2 . The first brush roller 49 is used to remove remaining impurities on the opposite surfaces of the first metal belt 1 and the second metal belt 2 .

[0065] The first brush roller 49 adopts a nylon brush and is driven by a motor. The first brush roller 49 rotates to clean impurities that have not been blown off the surfaces of the first metal belt 1 and the second metal belt 2 to ensure that the contact surface is clean.

[0066] S3: Pre-pressing and fixing: The cleaned first metal strip 1 and the second metal strip 2 are fed into the pre-pressing assembly 5 and stacked in an inert gas environment according to the principle of soft in the middle and hard on both sides for preliminary fixing to obtain a composite slab 6;

[0067] The pre-pressing assembly 5 includes a pre-pressing chamber 51 , which is fixedly mounted on the tail end of the cleaning tube 41 by bolts. A third discharge port 52 is provided at the tail end of the pre-pressing chamber 51 , and a fourth isolation brush 53 is fixedly mounted in the third discharge port 52 .

[0068] The inert gas in the cleaning tube 41 can enter the pre-pressing chamber 51 through the second discharge port 42 , and the third isolation brush 43 can reduce the amount of impurities in the cleaning tube 41 that enter the pre-pressing chamber 51 .

[0069] Two third guide rollers 54 are rotatably installed in the pre-pressing bin 51 near the cleaning pipe 41 , and the first metal strip 1 passes over the third guide rollers 54 and approaches the second metal strip 2 .

[0070] The first pre-pressing roller 55 and the second pre-pressing roller 57 are rotatably installed on the left and right sides of the pre-pressing bin 51 near the fourth isolation brush 53. The first pre-pressing roller 55 and the second pre-pressing roller 57 are used to press the first metal strip 1 and the second metal strip 2 into a composite slab 6.

[0071] There are two first pre-pressing rollers 55 and two second pre-pressing rollers 57 . The first pre-pressing rollers 55 and the second pre-pressing rollers 57 press the first metal strip 1 and the second metal strip 2 into a composite slab 6 from the upper and lower sides.

[0072] It should be noted that the spacing between the two first pre-pressing rollers 55 and the spacing between the two second pre-pressing rollers 57 are adjustable to accommodate first metal strips 1 and second metal strips 2 of different thicknesses.

[0073] Between the third guide roller 54 and the first pre-pressing roller 55 and located on the front and rear sides of the first metal belt 1 and the second metal belt 2, a correcting roller 56 is rotatably installed. The correcting roller 56 clamps the first metal belt 1 and the second metal belt 2 from the front and rear sides to avoid position deviation of the first metal belt 1 and the second metal belt 2, and ensure that both sides of the composite slab 6 are aligned.

[0074] The distance between the two deviation-correcting rollers 56 is adjustable.

[0075] S4: Rough rolling: The composite slab 6 undergoes a first rolling pass to obtain a corrugated composite slab 7. The first rolling pass uses a rolling mill with double corrugating rollers 9. The upper and lower surfaces of the corrugated composite slab 7 are corrugated. The bonding surface of the three metal plates of the corrugated composite slab 7 is also corrugated. The first rolling reduction is 60%.

[0076] S5: Finishing rolling: The corrugated composite slab 7 undergoes a second rolling pass to obtain a flat composite plate 8. The second rolling pass uses a rolling mill with double straight rollers 10. The upper and lower surfaces of the flat composite plate 8 are flat, and the bonding surface of the three metal plates of the flat composite plate 8 is a corrugated surface. The reduction rate of the second rolling pass is 40%;

[0077] S6: The straight composite plate 8 is subjected to edge trimming, heat treatment, straightening and segmentation to obtain a finished product.

[0078] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-ferrous metal composite strip rolling process, characterized in that: include: S1: selecting a first metal strip (1) and a second metal strip (2), wherein the second metal strip (2) has a lower deformation resistance than the first metal strip (1), feeding the first metal strip (1) and the second metal strip (2) into an impurity removal component (3), and removing the oxide layer on the surface of the first metal strip (1) and the second metal strip (2); The impurity removal component (3) includes an impurity removal box (31), the impurity removal box (31) is provided with a plurality of feed ports (32) and a plurality of first discharge ports (33), a plurality of feed rollers (36) are provided on the left and right sides of the impurity removal box (31), and the feed rollers (36) are used to drive the first metal strip (1) and the second metal strip (2) to enter from the feed port (32) and pass through the first discharge port (33); S2: sending the first metal strip (1) and the second metal strip (2) after impurities removal into a cleaning assembly (4) to remove oxide layer debris attached to the surfaces of the first metal strip (1) and the second metal strip (2) in an inert gas environment; The cleaning assembly (4) includes a cleaning pipe (41), the cleaning pipe (41) is fixedly installed on one side of the first discharge port (33) of the impurity removal box (31), the tail end of the cleaning pipe (41) is provided with a second discharge port (42), the second discharge port (42) is provided with a third isolation brush (43), and the first metal belt (1) and the second metal belt (2) pass through the second discharge port (42); The cleaning assembly (4) is provided with a first guide roller (44) and a second guide roller (45), and the first metal belt (1) is brought into proximity with the second metal belt (2) after passing through the first guide roller (44) and the second guide roller (45); An air jet assembly is provided between the first guide roller (44) and the second guide roller (45) and between the first metal strip (1) and the second metal strip (2), and the air jet assembly is used to blow air toward the opposite surfaces of the first metal strip (1) and the second metal strip (2) to remove attached impurities, and the air jet assembly uses an inert gas as a working gas; S3: The cleaned first metal strip (1) and the second metal strip (2) are fed into a pre-pressing assembly (5), and stacked in an inert gas environment according to the principle of soft in the middle and hard on both sides, and preliminarily fixed to obtain a composite slab (6); The pre-pressing assembly (5) includes a pre-pressing chamber (51), and the pre-pressing chamber (51) is fixedly mounted on the tail end of the cleaning tube (41); S4: The composite slab (6) is rolled in the first pass to obtain a corrugated composite slab (7). The first pass is rolled using a rolling mill with double corrugated rollers (9). The upper and lower surfaces of the corrugated composite slab (7) are corrugated surfaces. The bonding surface of the three metal plates of the corrugated composite slab (7) is also a corrugated surface. The first pass rolling reduction rate is 10%-65%. S5: The corrugated composite plate (7) is rolled in the second pass to obtain a flat composite plate (8). The second pass is rolled using a rolling mill with double flat rollers (10). The upper and lower surfaces of the flat composite plate (8) are flat surfaces, and the bonding surface of the three metal plates of the flat composite plate (8) is a corrugated surface. The reduction rate of the second pass is 30%-60%. S6: The flat composite plate (8) is subjected to edge trimming, heat treatment, straightening and segmentation to obtain a finished product.

2. The non-ferrous metal composite strip rolling process according to claim 1, wherein: A first isolation brush (34) is provided inside the feed port (32), and a second isolation brush (35) is provided inside the first discharge port (33). The first isolation brush (34) and the second isolation brush (35) are in contact with the upper and lower sides of the first metal strip (1) and the second metal strip (2).

3. The non-ferrous metal composite plate and strip rolling process according to claim 2, wherein: A plurality of shot blasting assemblies are provided in the impurity removal box (31) and between the first metal strip (1) and the second metal strip (2). The shot blasting assemblies are used to remove oxide layers on opposite surfaces of the first metal strip (1) and the second metal strip (2). The shot blasting assemblies use inert gas as a working gas.

4. The non-ferrous metal composite plate and strip rolling process according to claim 1, wherein: A first brush roller (49) is provided on the right side of the second guide roller (45) and between the first metal strip (1) and the second metal strip (2). The first brush roller (49) is used to remove residual impurities on the opposite sides of the first metal strip (1) and the second metal strip (2).

5. The non-ferrous metal composite strip rolling process according to claim 1, wherein: A third discharge port (52) is provided at the tail end of the pre-pressing bin (51), and a fourth isolation brush (53) is provided in the third discharge port (52).

6. The non-ferrous metal composite plate and strip rolling process according to claim 5, characterized in that: A first pre-pressing roller (55) and a second pre-pressing roller (57) are provided on the left and right sides of the pre-pressing bin (51) near the fourth isolation brush (53). The first pre-pressing roller (55) and the second pre-pressing roller (57) are used to press the first metal strip (1) and the second metal strip (2) into a composite slab (6).

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