Metal material composite processing method

Abstract

A metal material composite processing method comprises the following steps: contacting a first surface (31) of a first plate body (3) with a second surface (41) of a second plate body (4); placing the first plate body (3) and the second plate body (4) in a circumferential groove (13) of a first roller (1), and making a third surface (42) of the second plate body (4) contact a bottom wall of the groove (13), the third surface (42) being opposite to the second surface (41), the hardness of the first plate body (3) being greater than the hardness of the second plate body (4); and controlling the rotation of the first roller (1) and a second roller (2) to roll and form the first plate body (3) and the second plate body (4) into a composite plate (5), wherein, during the rolling process, a fourth surface (32) of the first plate body (3) contacts the surface of the second roller (2), the fourth surface (32) being opposite to the first surface (31). The metal material composite processing method can avoid the generation of flash and burrs on the side edges of the composite plate (5) by placing the first plate body (3) and the second plate body (4) in the groove (13) for processing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material processing, in particular to a metal material composite processing method. BACKGROUND

[0002] Metal composite rolling is a processing method that physically and chemically different metals are firmly combined together on the whole contact surface through rolling. The composite workpiece obtained by rolling processing has defects such as flash and burr, which need to be treated in subsequent production processes, greatly increasing the production cost.

[0003] Taking steel plate-aluminum alloy composite rolling as an example, in the related technology, a rolling equipment with four rollers is used for rolling, wherein the four rollers include two working rollers and two side rollers, the two working rollers roll form the steel plate-aluminum alloy, and the two side rollers roll the side edges of the composite workpiece in the forming process or after forming. In the working process of the equipment, the side rollers cannot tightly press the side surface of the working rollers to avoid excessive friction between the working rollers and the side rollers, which can cause damage to the rolling equipment, so that the width size of the composite workpiece is not easy to guarantee, and when the pressing degree of the side rollers is insufficient or the size deviation of the raw material is large, the flash and burr are more likely to occur in the width direction of the composite workpiece. SUMMARY

[0004] The present application provides a metal material composite processing method to solve the problem of low processing precision of the rolling process in the prior art and easy generation of flash and burr. The first plate body and the second plate body are placed in the groove for processing, so that the flash and burr are avoided on the side edges of the composite plate.

[0005] The present application provides a metal material composite processing method, comprising:

[0006] The first surface of the first plate body is in contact with the second surface of the second plate body;

[0007] The first plate body and the second plate body are placed in the groove in the circumferential direction of the first roller, and the third surface of the second plate body contacts the bottom wall of the groove, wherein the third surface is opposite to the second surface, and the hardness of the first plate body is less than the hardness of the second plate body;

[0008] The first roller and the second roller are controlled to rotate to roll form the first plate body and the second plate body into a composite plate, wherein in the rolling process, the fourth surface of the first plate body contacts the surface of the second roller, and the fourth surface is opposite to the first surface.

[0009] According to the metal material composite processing method provided by the present application, before the step of contacting the first surface of the first plate body with the second surface of the second plate body,

[0010] At least one of the first surface and the second surface is roughened to form a plurality of stripes on at least one of the first surface and the second surface, spaces are provided between adjacent stripes, and the number of the stripes at the preset space is controlled to be greater than or equal to a preset proportion of the total number of the stripes.

[0011] According to the metal material composite machining method provided by the application, in the step of roughening the first surface,

[0012] The first surface is controlled to have a preset space of 0.005-0.03 mm and a preset proportion of 90%.

[0013] According to the metal material composite machining method provided by the application, in the step of roughening the first surface,

[0014] The first surface is controlled to have a preset space of 0.01-0.02 mm and a preset proportion of 90%.

[0015] According to the metal material composite machining method provided by the application, in the step of roughening the first surface,

[0016] The first surface is controlled to have a preset space of 0.01-0.02 mm and a preset proportion of 80%.

[0017] According to the metal material composite machining method provided by the application, in the step of roughening the first surface,

[0018] The first surface is controlled to have a preset space of 0.01-0.02 mm and a preset proportion of 70%.

[0019] According to the metal material composite machining method provided by the application, in the step of roughening the first surface,

[0020] The first surface is controlled to have a preset space of 0.01-0.02 mm and a preset proportion of 50%.

[0021] According to the metal material composite machining method provided by the application, in the step of roughening at least one of the first surface and the second surface,

[0022] The first surface and the second surface are rubbed by a roughening friction roller to form stripes, the roughening friction roller comprises a steel wire brush roller, the steel wire brush roller works under a pressure of 1-1.5 MPa, the diameter of the steel wire brush roller is 250-400 mm, the rotating speed of the steel wire brush roller is 400-600 r / min, the hardness of the brush wire of the steel wire brush roller is HRC 55-60, the length of the brush wire is 10-40 mm, and the diameter of the brush wire is 0.3-0.5 mm.

[0023] According to the metal material composite machining method, in the step of roughening the first surface,

[0024] The first surface and the second surface are rubbed by a roughening friction roller to form stripes, the roughening friction roller comprises a steel wire brush roller, the steel wire brush roller works under a pressure of 1-1.5 MPa, the diameter of the steel wire brush roller is 250-400 mm, the rotating speed of the steel wire brush roller is 400-600 r / min, the hardness of the brush wire of the steel wire brush roller is HRC 55-60, the length of the brush wire is 10-40 mm, and the diameter of the brush wire is 0.3-0.5 mm.

[0025] According to the metal material composite machining method, in the step of roughening the first surface,

[0026] The debris of the first surface is removed.

[0027] Or, after the step of roughening the second surface, the method further comprises the following steps:

[0028] The debris of the second surface is removed.

[0029] According to the metal material composite machining method, in the step of roughening the first surface,

[0030] The number of stripes per unit area of the first surface is obtained;

[0031] When the number of stripes per unit area of the first surface is less than a corresponding preset value, the height of a roughening friction roller used for rubbing the first surface to form stripes is raised;

[0032] Or, in the step of roughening the second surface,

[0033] The number of stripes per unit area of the second surface is obtained;

[0034] When the number of stripes per unit area of the second surface is less than a corresponding preset value, the position of a roughening friction roller used for roughening is adjusted so that the roughening friction roller sufficiently contacts the second surface.

[0035] According to the metal material composite processing method, before the step of controlling the first roller and the second roller to rotate to roll and form the composite plate from the first plate body and the second plate body, the method further comprises:

[0036] The first plate body and the second plate body are heated to a preset temperature.

[0037] According to the metal material composite processing method, after the step of controlling the first roller and the second roller to rotate to roll and form the composite plate from the first plate body and the second plate body, the method further comprises:

[0038] The composite plate is subjected to solid solution treatment.

[0039] The composite plate after the solid solution treatment is subjected to aging treatment.

[0040] According to the metal material composite processing method, the solid solution temperature of the solid solution treatment is 480-400℃, and the solid solution time of the solid solution treatment is 45-65min.

[0041] The aging temperature of the aging treatment is 160-200℃, and the aging time of the aging treatment is 5-7h.

[0042] According to the metal material composite processing method, before the step of contacting the first surface of the first plate body with the second surface of the second plate body, the method further comprises:

[0043] The first plate body and the second plate body are pre-prepared to have a thickness ratio of 1.5:1.0.

[0044] In the step of controlling the first roller and the second roller to rotate to roll and form the composite plate from the first plate body and the second plate body,

[0045] The allometric ratio of the first roller and the second roller is 1:1.05, and the rolling reduction rate is controlled to be 20%-40%.

[0046] According to the metal material composite processing method, before the step of contacting the first surface of the first plate body with the second surface of the second plate body,

[0047] The roughness of the first surface is pre-prepared to be 0.8-4.0Ra.

[0048] According to the metal material composite processing method, before the step of contacting the first surface of the first plate body with the second surface of the second plate body,

[0049] The roughness of the second surface is pre-prepared to be 4-10Ra.

[0050] The metal material composite processing method provided by the present application, the first plate body is a stainless steel plate, and the second plate body is an aluminum plate.

[0051] The metal material composite processing method provided by the present application, in the step of controlling the first roller and the second roller to roll and form the first plate body and the second plate body into a composite plate,

[0052] The shear strength τ of the composite plate is a*b*K1*K2*σ 软 ,

[0053] Wherein, a is the length of the first plate body, b is the width of the first plate body, K1 is the roughened area ratio of the first plate body, the value range of K1 is 1.5-3; K2 is the combination rate of the first plate body and the second plate body, the value range of K2 is 0.15-0.3, when K1*K2>1, the product of K1 and K2 is 1; the σ 软 is the yield strength of the second plate body, the value range of σ 软 is 350Mpa-412Mpa.

[0054] The metal material composite processing method provided by the present application, before the step of roughening the first surface,

[0055] The first plate body is pre-prepared in a long strip shape;

[0056] In the step of roughening the first surface,

[0057] The length direction of the strip of the first surface is controlled to form a first preset included angle with the width direction of the first plate body;

[0058] Or, before the step of roughening the second surface,

[0059] The second plate body is pre-prepared in a long strip shape;

[0060] In the step of roughening the second surface,

[0061] The length direction of the strip of the second surface is controlled to form a preset included angle with the width direction of the second plate body.

[0062] The metal material composite processing method provided by the present application, by placing the first plate body and the second plate body in the groove of the first roller, the side edges of the first plate body and the second plate body are limited by the groove, since the hardness of the first plate body is smaller, the burrs and flash of the side edges of the first plate body and the second plate body can be effectively avoided, and then the first plate body and the second plate body are rolled to form a composite plate, and the composite plate is not easy to form burrs and flash. BRIEF DESCRIPTION OF DRAWINGS

[0063] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0064] Figure 1 is a flowchart of the metal material composite processing method provided by the present application;

[0065] Figure 2 is a structural schematic diagram of the first surface of the first plate body rolled in the metal material composite processing method provided by the present application;

[0066] Figure 3 is a structural schematic diagram of the second surface of the second plate body rolled in the metal material composite processing method provided by the present application;

[0067] Figure 4 is a structural schematic diagram of the composite plate obtained by rolling in the metal material composite processing method provided by the present application;

[0068] Figure 5 is a partial enlarged structural schematic diagram of the A part in Figure 4

[0069] Figure 6 is a sectional structural schematic diagram of the first rolling device provided by the present application;

[0070] Figure 7 is a partial enlarged structural schematic diagram of the B part in Figure 6

[0071] Figure 8 is a sectional structural schematic diagram of the second rolling device provided by the present application;

[0072] Figure 9 is a partial enlarged structural schematic diagram of the C part in Figure 8

[0073] Figure 10 is a sectional structural schematic diagram of the third rolling device provided by the present application;

[0074] Figure 11 is a partial enlarged structural schematic diagram of the D part in Figure 10

[0075] Reference signs:

[0076] 1, first roller; 11, first roller core; 12, first roller sleeve; 13, groove; ​​​​

[0077] 2, second roller; 21, second roller core; 22, second roller sleeve; 23, protrusion;

[0078] 3, first plate body; 31, first surface; 32, fourth surface; 33, stripe;

[0079] 4, second plate body; 41, second surface; 42, third surface;

[0080] 5, composite plate. DETAILED DESCRIPTION

[0081] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0082] Embodiments of the first aspect of the present application are combined with Figures 1 to 5 As shown in the drawings, a metal material composite processing method is provided, comprising:

[0083] Step 110, the first surface 31 of the first plate body 3 is in contact with the second surface 41 of the second plate body 4;

[0084] The opposite surfaces of the first plate body 3 and the second plate body 4 are in contact, so that the first plate body 3 and the second plate body 4 are rolled into a composite plate 5.

[0085] Step 120, the first plate body 3 and the second plate body 4 are placed in the groove 13 around the first roller 1, and the third surface 42 of the second plate body 4 is in contact with the bottom wall of the groove 13, wherein the third surface 42 is opposite to the second surface 41, and the hardness of the first plate body 3 is greater than that of the second plate body 4;

[0086] The hardness of the second plate body 4 is smaller, and the second plate body 4 is easy to deform under the action of the rolling force. By placing the second plate body 4 with smaller hardness at the bottom of the groove 13, the second plate body 4 can be limited by the side wall of the groove 13, so as to avoid burrs and flash on the side edge of the second plate body 4. The first plate body 3 is closer to the opening of the groove 13, and in the rolling process, the first plate body 3 with greater hardness is not easy to overflow the groove 13, which can also effectively avoid the burrs and flash on the side edge of the second plate body 4, and further, the composite plate 5 formed by rolling the first plate body 3 and the second plate body 4 is not easy to form burrs and flash.

[0087] The groove 13 is an annular groove around the circumference of the first roller 1. The first plate body 3 and the second plate body 4 are placed in the groove 13 and correspond to the second roller 2. During the rotation of the first roller 1, the first plate body 3 and the second plate body 4 are always in the groove 13, and the first roller 1 and the second roller 2 cooperate to roll and convey. Generally, the first roller 1 is located below the second roller 2. After the first plate body 3 and the second plate body 4 are placed in the groove 13, the second plate body 4 is located below the first plate body 3.

[0088] It should be noted that the above steps 110 and 120 do not limit the execution order, which can be selected as needed. For example, first, the first plate body 3 and the second plate body 4 are contacted, and then the first plate body 3 and the second plate body 4 are placed in the groove 13; or, first, the second plate body 4 is placed in the groove 13, and then the first plate body 3 is placed in the groove 13 to make the second plate body 4 contact the first plate body 3, that is, the first surface 31 contacts the second surface 41.

[0089] In step 130, the first roller 1 and the second roller 2 are controlled to rotate to roll and form the first plate body 3 and the second plate body 4 into the composite plate 5. During the rolling process, the fourth surface 32 of the first plate body 3 contacts the surface of the second roller 2, and the fourth surface 32 is opposite to the first surface 31.

[0090] The first plate body 3 and the second plate body 4 are formed into an integrated composite plate 5 by rolling. The composite plate 5 has high structural strength and stable quality. After the first roller 1 and the second roller 2 are positioned, the surface of the second roller 2 contacts the fourth surface 32, which prepares for the rolling process.

[0091] In the rolling process, the size of the rolling force between the first roller 1 and the second roller 2 can be adjusted according to the characteristics of the first plate body 3 and the second plate body 4 and the processing requirements of the composite plate 5.

[0092] In the metal material composite processing method of the embodiment, the first plate body 3 and the second plate body 4 to be processed are placed in the groove 13 of the first roller 1. In the rolling process, the side wall of the groove 13 limits the first plate body 3 and the second plate body 4, which can effectively avoid the formation of burrs and burrs on the side edges of the composite plate 5. In the subsequent process, the process of removing the burrs and burrs can be omitted, which helps to simplify the processing process, shorten the processing period, and reduce the processing cost. Moreover, by cooperating the side wall of the groove 13 with the first plate body 3 with high hardness, all surfaces of the second plate body 4 with low hardness are limited, which can effectively avoid the formation of burrs and burrs on the side edges of the second plate body 4.

[0093] In some embodiments, before step 110, that is, before the step of contacting the first surface 31 of the first plate body 3 with the second surface 41 of the second plate body 4,

[0094] At least one of the first surface 31 and the second surface 41 is subjected to a roughening treatment so that at least one of the first surface 31 and the second surface 41 is configured with a plurality of stripes 33, and a distance is provided between adjacent stripes 33, and the number of stripes at the preset distance is controlled to be greater than or equal to a preset proportion of the total number of stripes.

[0095] In the present embodiment, the stripe 33 is a groove formed in at least one of the first surface 31 and the second surface 41 after the roughening treatment, and the depth of the groove is related to the pressure received during the roughening treatment. The distance between the bottoms of two grooves is referred to as the distance between adjacent stripes 33, and the length of the stripe 33 is the distance over which the stripe 33 extends.

[0096] In some embodiments, the first surface 31 is subjected to a roughening treatment so that the first surface 31 is configured with a plurality of stripes 33. The roughening treatment increases the surface area of the first surface 31 to increase the area during rolling of the first plate body 3 and the second plate body 4, so that the composite plate 5 after rolling of the first plate body 3 and the second plate body 4 has a higher bonding strength and is more firmly bonded. The more uniform the stripes 33 and the smaller the distance between adjacent two stripes 33, the more the number of stripes 33 per unit area, and the larger the area during rolling of the first plate body 3 and the second plate body 4, so that the composite plate 5 after the first plate body 3 and the second plate body 4 are combined has a higher bonding strength.

[0097] Because the second plate body 4 has a smaller hardness, the second plate body 4 will deform during rolling, and the material of the second plate body 4 will enter the grooves of the stripes 33 of the first plate body 3. After the first plate body 3 cools, the distance between the stripes 33 is reduced, and the surface of the second plate body 4 is in close contact with the surface of the stripes 33 of the first plate body 3, forming an interference fit, thereby tightly combining the first plate body 3 and the second plate body 4 together.

[0098] In some embodiments, the step of roughening the first surface 31 is performed before the step of roughening the second surface 41,

[0099] The first plate body 3 is preformed into a long strip shape,

[0100] In the step of roughening the first surface 31,

[0101] The length direction of the stripe 33 of the first surface 31 is controlled to form a first preset angle with the width direction of the first plate body 3.

[0102] The preset angle in the present embodiment can be but is not limited to 70°-82°. The stripe 33 of the first surface 31 is used to increase the contact area during rolling of the second plate body 4 and the first plate body 3.

[0103] In some embodiments, the step of roughening the second surface 41 is performed before the step of roughening the first surface 31, and the second plate body 4 is preformed into a long strip shape,

[0104] In the step of roughening the second surface 41,

[0105] The length direction of the stripes of the second surface 41 forms a second preset angle with the width direction of the second plate body 4.

[0106] In the embodiment, the second surface 41 is processed with multiple stripes, and the preset angle can be but is not limited to 70°-82°. The stripes of the second surface 41 can be used to discharge air during the rolling of the composite plate 5. Since the length direction of the stripes forms a preset angle with the width direction of the second plate body 4, the length of the stripes is relatively short. The shorter the length of the stripes is, the more beneficial it is to discharge air between the second plate body 4 and the first plate body 3, so that the bonding strength of the composite plate 5 is higher. The second plate body 4 is in the shape of a long strip.

[0107] The second preset angle corresponding to the stripes of the second plate body 4 can be equal to the first preset angle corresponding to the stripes 33 of the first plate body 3, so as to ensure better coupling between the second plate body 4 and the first plate body 3 during rolling.

[0108] In the above embodiment, the stripes 33 are straight-line stripes, and the straight-line stripes are arranged at intervals. The distance between the adjacent two stripes 33 can be equal or unequal.

[0109] In some embodiments, in the step of roughening the first surface 31,

[0110] The stripes 33 of the first surface 31 are controlled to have a preset interval of 0.005mm-0.03mm and a preset proportion of 90%. That is, the number of stripes with a distance of 0.005-0.03mm between adjacent two stripes accounts for more than or equal to 90% of the total number of the stripes 33. The size range of the preset interval is relatively large, which is convenient for processing the stripes 33 and can also meet the structural requirements of the composite plate 5. At this time, the shear strength of the composite plate 5 can reach 210Mpa-245Mpa.

[0111] In some embodiments, in the step of roughening the first surface 31,

[0112] The stripes 33 of the first surface 31 are controlled to have a preset interval of 0.01mm-0.02mm and a preset proportion of 90%. That is, the number of stripes with a distance of 0.01mm-0.02mm between adjacent two stripes accounts for more than or equal to 90% of the total number of the stripes 33. At this time, the shear strength of the composite plate 5 can reach 200Mpa-230Mpa.

[0113] In some embodiments, in the step of roughening the first surface 31,

[0114] The strip 33 of the first surface 31 is controlled to have a preset interval of 0.01mm-0.02mm and a preset proportion of 80%. That is, the number of strips with a distance of 0.01mm-0.02mm between two adjacent strips accounts for more than or equal to 80% of the total number of strips 33, and in this case, the shear strength of the composite plate 5 can reach 190Mpa-225Mpa.

[0115] In some embodiments, the step of roughening the first surface 31,

[0116] The strip 33 of the first surface 31 is controlled to have a preset interval of 0.01mm-0.02mm and a preset proportion of 70%. That is, the number of strips with a distance of 0.01mm-0.02mm between two adjacent strips accounts for more than or equal to 70% of the total number of strips 33, and in this case, the shear strength of the composite plate 5 can reach 185Mpa-220Mpa.

[0117] In some embodiments, the step of roughening the first surface 31,

[0118] The strip 33 of the first surface 31 is controlled to have a preset interval of 0.01mm-0.02mm and a preset proportion of 50%. That is, the number of strips with a distance of 0.01mm-0.02mm between two adjacent strips accounts for more than or equal to 50% of the total number of strips 33, and in this case, the shear strength of the composite plate 5 can reach 170Mpa-210Mpa.

[0119] In some embodiments, the step of roughening the first surface 31,

[0120] The strip 33 of the first surface 31 is controlled to have a preset interval of 0.01mm-0.02mm and a preset proportion of 40%. That is, the number of strips with a distance of 0.01mm-0.02mm between two adjacent strips accounts for more than 40% of the total number of strips 33.

[0121] It should be noted that the more uniform the size range of the strip 33, the higher the bonding strength of the composite plate 5 after the first plate body 3 and the second plate body 4 are combined.

[0122] In some embodiments, the step of roughening at least one of the first surface 31 and the second surface 41,

[0123] The strip is formed by rubbing at least one of the first surface 31 and the second surface 41 with a rubbing roller.

[0124] The texturing process is to form groove-shaped straight lines on at least one of the first surface 31 and the second surface 41. The texturing friction roller includes a steel wire brush roller or a grinding wheel. The texturing process can be performed once, twice or more times.

[0125] During the contact with the first surface 31 or the second surface 41, the texturing friction roller forms the lines by friction. Since the texturing friction roller rotates at a uniform speed and the first plate body 3 and the second plate body 4 move at a uniform speed along the second direction, the lines formed on at least one of the first surface 31 and the second surface 41 are straight lines, and the straight lines are arranged at intervals. The straight lines of the first surface 31 are at a first preset angle with the width direction of the first plate body 3, or the straight lines of the second surface 41 are at a second preset angle with the width direction of the second plate body 4.

[0126] In some embodiments, during the texturing process of at least one of the first surface 31 and the second surface 41,

[0127] The steel wire brush roller works under a pressure of 1 MPa to 1.5 MPa, has a diameter of 250 mm to 400 mm, rotates at a speed of 400 r / min to 600 r / min, has a brush wire hardness of HRC 55 to 60, and has a brush wire length of 10 mm to 40 mm and a brush wire diameter of 0.3 mm to 0.5 mm.

[0128] The lines 33 are formed by friction. Since the texturing friction roller rotates at a uniform speed and the first plate body 3 and the second plate body 4 move at a uniform speed along the second direction, the lines formed on at least one of the first surface 31 and the second surface 41 are straight lines, and the straight lines are arranged at intervals. The straight lines of the first surface 31 are at a first preset angle with the width direction of the first plate body 3, or the straight lines of the second surface 41 are at a second preset angle with the width direction of the second plate body 4.

[0129] In some embodiments, during the texturing process of at least one of the first surface 31 and the second surface 41,

[0130] The texturing friction roller includes a grinding wheel, the grinding wheel has a grit size of 40 to 120, and works under a pressure of 0.1 MPa to 0.5 MPa and has a diameter of 200 mm to 400 mm.

[0131] In some embodiments, during the texturing process of the first surface 31,

[0132] The debris of the first surface 31 is removed.

[0133] In some embodiments, during the texturing process of the second surface 41,

[0134] Remove the debris of the second surface 41.

[0135] The debris of the first surface 31 or the second surface 41 can be removed in the process of the dust removal roller rotating. When the first plate body 3 or the second plate body 4 moves to between the upper and lower rows of air jets, the air jets spray high-speed airflow to the first plate body 3 or the second plate body 4, further removing the debris of the first surface 31 or the second surface 41, so that the surface of the first plate body 3 or the second plate body 4 is clean, ensuring that the camera can obtain clear image information, and avoiding affecting the compounding of the first plate body 3 and the second plate body 4.

[0136] In some embodiments, in the step of roughening the first surface 31,

[0137] Obtain the number of stripes per unit area of the first surface 31;

[0138] Determine that the number of stripes per unit area of the first surface 31 is less than the corresponding preset value, and adjust the position of the roughening friction roller used for roughening to make the roughening friction roller fully contact the first surface 31.

[0139] The control terminal can calculate the number of stripes per unit area according to the obtained image information. When it is determined that the number of stripes per unit area of the first surface 31 is less than the corresponding preset value, the control terminal sends a control instruction to the controller, and the controller controls the lifting assembly to rise according to the control instruction, increasing the height of the roughening friction roller, so that the roughening friction roller closely contacts the first surface 31.

[0140] When it is determined that the number of stripes per unit area of the first surface 31 is greater than the corresponding preset value, it indicates that the roughening friction roller is in good contact with the first surface 31, and there is no need to adjust the position of the roughening friction roller.

[0141] Similarly, in the step of roughening the second surface 41,

[0142] Obtain the number of stripes per unit area of the second surface 41;

[0143] Determine that the number of stripes per unit area of the second surface 41 is less than the corresponding preset value, and adjust the position of the roughening friction roller used for roughening to make the roughening friction roller fully contact the second surface 41.

[0144] When it is determined that the number of stripes per unit area of the second surface 41 is greater than the corresponding preset value, it indicates that the roughening friction roller is in good contact with the second surface 41, and there is no need to adjust the position of the roughening friction roller.

[0145] It should be noted that the step of obtaining the number of stripes per unit area of the first surface 31 or the second surface 41 is generally after removing the debris.

[0146] In some embodiments, before the step of controlling the first roller 1 and the second roller 2 to rotate to roll and form the composite plate 5 from the first plate body 3 and the second plate body 4, the method further comprises the steps of:

[0147] controlling the first plate body 3 and the second plate body 4 to be heated to a preset temperature.

[0148] The first plate body 3 is heated to a temperature of 350 DEG C by using an online heating method, such as an eddy current heating method. By using the online heating method, the first surface 31 of the first plate body 3 and the second surface 41 of the second plate body 4 can be rolled in a semi-melted state, thereby further improving the bonding strength of the composite plate 5.

[0149] In the embodiment, the first plate body 3 is heated by using the online heating method, i.e., the stainless steel plate is heated by using the online heating method. The purpose is to make the stripe 33 of the first surface 31 expand due to heat, so as to widen and deepen the groove of the stripe 33. Then, the heated stainless steel plate and the aluminum alloy plate with low hardness are rolled together by the upper and lower rollers. Since the hardness of the stainless steel plate is much higher than that of the aluminum alloy plate, the aluminum alloy plate is pressed into the groove of the stainless steel surface on the composite surface of the aluminum alloy plate and the stainless steel plate, and the aluminum alloy plate surface expands due to heat, so that the stainless steel plate and the aluminum alloy plate are tightly fitted together on both sides of the groove, thereby forming an interference fit, and thus the stainless steel plate and the aluminum alloy plate are tightly bonded together.

[0150] According to the embodiment of the present application, after the step of controlling the first roller 1 and the second roller 2 to rotate to roll and form the composite plate 5 from the first plate body 3 and the second plate body 4, the method further comprises the steps of:

[0151] In step 140, the composite plate 5 is subjected to solid solution treatment.

[0152] The solid solution treatment includes a heating stage and a cooling stage. In the heating stage, the composite plate 5 is placed in a solid solution furnace for solid solution treatment. The solid solution temperature is 480 DEG C to 540 DEG C, and the solid solution time is 45 min to 65 min. In the cooling stage, the composite plate 5 is rapidly cooled to room temperature. By subjecting the composite plate 5 to solid solution treatment, the bonding strength of the composite plate 5 is further improved.

[0153] In step 150, the composite plate 5 after the solid solution treatment is subjected to aging treatment.

[0154] After the solid solution treatment of the composite plate 5, the aging treatment is needed. The aging treatment is carried out in an aging furnace, and the aging temperature of the aging treatment is 160-200 DEG C, and the aging time of the aging treatment is 5-7 hours. Through the aging treatment of the composite plate, the bonding strength of the composite plate can be further improved.

[0155] In some embodiments, before the step of contacting the first surface 31 of the first plate body 3 with the second surface 41 of the second plate body 4, further comprising:

[0156] The first plate body 3 and the second plate body 4 are prefabricated with a thickness ratio of 1.5:1.0;

[0157] In the step of controlling the rotation of the first roller 1 and the second roller 2 to roll the first plate body 3 and the second plate body 4 into the composite plate 5,

[0158] The speed ratio of the first roller 1 and the second roller 2 is 1:1.05, and the reduction rate of the rolling is controlled to be 20%-40%.

[0159] Wherein, the first roller 1 and the second roller 2 can be asynchronous rolling, which means that the stainless steel plate and the aluminum alloy plate (i.e. the first plate body 3 and the second plate body 4) are rolled into a composite plate by using upper and lower rollers, and the rotation speed of the first roller 1 and the second roller 2 is different.

[0160] In some embodiments, before the step 110, that is, before the step of contacting the first surface 31 of the first plate body 3 with the second surface 41 of the second plate body 4,

[0161] The surface roughness of the first surface 31 is prefabricated to be 0.8Ra-4.0Ra. Wherein, Ra is the arithmetic average roughness.

[0162] By controlling the surface roughness of the first surface 31, the contact area of the first surface 31 and the second surface 41 can be ensured, and the rolling fixing effect of the first plate body 3 and the second plate body 4 can be ensured.

[0163] In some embodiments, before the step 110, that is, before the step of contacting the first surface 31 of the first plate body 3 with the second surface 41 of the second plate body 4,

[0164] The surface roughness of the second surface 41 is prefabricated to be 4Ra-10Ra. Wherein, Ra is the arithmetic average roughness.

[0165] The first surface 31 and the second surface 41 cooperate to effectively improve the hardness of the composite plate 5, meet the processing requirements of the composite plate 5, and further meet the demand of making mobile phone frame.

[0166] In some embodiments, before step 110, the step of contacting the first surface 31 of the first plate body 3 with the second surface 41 of the second plate body 4 is performed before step 110,

[0167] The first plate body 3 is preformed to have a hardness of HV 270-330. Here, HV is Vickers hardness, and the unit is kg / mm 2 .

[0168] Vickers hardness is defined as follows: a right tetragonal pyramid diamond indenter is pressed into the surface of a sample under a certain load and kept for a certain time, and then the test force is unloaded. The ratio of the load used to the area of the indentation formed on the surface of the sample.

[0169] The hardness of the first plate body 3 is preformed to be HV 270-330, so that the hardness of the composite plate 5 after processing meets the requirements.

[0170] In some embodiments, in step 130, the step of controlling the first roller 1 and the second roller 2 to roll the first plate body 3 and the second plate body 4 into the composite plate 5,

[0171] The shear strength of the composite plate 5 is a*b*K1*K2*σ 软 ;

[0172] Wherein, a is the length of the second plate body 4, b is the width of the second plate body 4, K1 is the roughness area ratio of the second plate body 4, K1 is in the range of 1.5-3; K2 is the combination rate of the first plate body 3 and the second plate body 4, K2 is in the range of 0.15-0.3, when K1*K2>1, the product of K1 and K2 is 1; σ 软 is the yield strength of the first plate body 3, σ 软 is in the range of 350-412Mpa.

[0173] The composite plate 5 can be used for mobile phone frame and other applications with high shear strength requirements.

[0174] In some embodiments, the first plate body 3 is a stainless steel plate, and the second plate body 4 is an aluminum plate. The stainless steel plate and the aluminum plate are roll formed into the composite plate 5, and the shear strength of the composite plate 5 is optimized, so that the composite plate 5 is more firm.

[0175] The first plate body 3 is a stainless steel plate, which includes stainless steel plates containing various alloy components and stainless steel plates containing various non-metallic elements, or stainless steel plates with various metallographic structures. The second plate body 4 is an aluminum alloy plate, which includes aluminum alloy plate bodies containing various alloys and various component ratios.

[0176] Of course, the materials of the first plate body 3 and the second plate body 4 are not limited to this, and are determined according to actual needs. The following will be described in combination with Figures 1 to 5One specific embodiment of the present application is described as follows: the composite plate 5 is formed by rolling the first plate body 3 and the second plate body 4, the first plate body 3 is a stainless steel plate, and the second plate body 4 is an aluminum plate. The first surface 31 of the stainless steel plate is formed with a stripe 33, the stripe 33 is a straight line stripe, and the straight line stripes are arranged at intervals. The proportion of the stripes with a distance of 0.02 mm between two adjacent stripes in the total number of the stripes is greater than 90%. The stainless steel plate is in a strip shape, the length direction of the stripe 33 forms an angle of 78° with the width direction of the stainless steel plate, the hardness of the stainless steel plate is HV300, and the roughness of the first surface 31 of the stainless steel plate is 2Ra.

[0177] The second surface 41 of the aluminum alloy plate is also formed with a stripe, and the thickness ratio of the stainless steel plate to the aluminum alloy plate is 1.5:1.0. The stripe of the aluminum alloy plate is also a straight line stripe, and the straight line stripes are arranged at intervals. The proportion of the stripes with a distance of 0.02 mm between two adjacent stripes in the total number of the stripes is greater than 90%. The aluminum alloy plate is also in a strip shape, the length direction of the stripe forms an angle of 78° with the width direction of the aluminum alloy plate, and the roughness of the second surface 41 of the aluminum alloy plate is 3Ra.

[0178] The first surface 31 of the stainless steel plate and the second surface 41 of the aluminum alloy plate are rolled and connected to form the composite plate 5, and the shear strength of the composite plate 5 satisfies a*b*K1*K2*σ 软 , a is the length of the stainless steel plate, b is the width of the stainless steel plate, K1 is the roughening area ratio of the stainless steel plate, the value range of K1 is 2, K2 is the combination rate of the stainless steel plate and the aluminum alloy plate, the value range of K2 is 0.2, when K1*K2>1, the product of K1 and K2 is 1, σsoft is the yield strength of the aluminum alloy plate, and the value range of σ 软 is 380 MPa.

[0179] The first surface 31 of the first plate body 3 is roughened to form the stripe 33, the area during rolling of the second plate body 4 and the first plate body 3 is increased, the combination strength of the composite plate 5 after the combination of the second plate body 4 and the first plate body 3 is higher, and the combination is more firm. The shear force that can be borne by the composite plate 5 rolled by the embodiment of the present application is larger, the combination of the composite plate 5 is more compact, the structure is firm, and the design requirements are met. The composite plate 5 can be used as a material for processing a mobile phone frame and applied to the manufacturing of a mobile phone to meet multiple requirements such as small signal shielding degree and low strength-weight ratio.

[0180] The embodiment of the second aspect of the present application, in combination with Figures 6 to 11 , further provides a rolling device, which comprises a first roller 1 and a second roller 2, the first roller 1 is configured with a circumferential groove 13, and the second roller 2 is adapted to cooperate with the first roller 1 for rolling.

[0181] The first roller 1 and the second roller 2 rotate oppositely to roll and convey the workpiece. The first roller 1 is circumferentially surrounded by the groove 13, so that the workpiece is always kept in the groove 13 during rolling, and the wall of the groove 13 limits the workpiece to solve the problem of burrs and burrs on the side of the workpiece, optimize the rolling effect, and save the process of removing burrs and burrs.

[0182] The metal material composite processing method of the above embodiment can be performed by the rolling device in the embodiment and the following embodiments. That is, the first plate body 3 and the second plate body 4 are placed in the groove 13 and rolled by the first roller 1 and the second roller 2.

[0183] In some embodiments, referring to Figure 6 and Figure 7 , the second roller 2 is configured with circumferentially arranged protrusions 23, which are suitable for inserting into the groove 13. By cooperating the protrusions 23 and the groove 13, the workpiece in the groove 13 is limited, effectively avoiding the overflow of the workpiece from the gap between the first roller 1 and the second roller 2, so as to effectively avoid the formation of burrs and burrs on the workpiece.

[0184] Among them, the protrusions 23 are arranged around the circumference of the second roller 2, and at the position where the first roller 1 and the second roller 2 roll, the protrusions 23 need to cover the opening of the groove 13 to ensure the processing effect.

[0185] In some embodiments, referring to Figure 6 , Figure 8 and Figure 10 , at least one of the first roller 1 and the second roller 2 includes a roller core and a roller sleeve sleeved outside the roller core, which facilitates independent replacement of the roller core or the roller sleeve.

[0186] When the surface of the roller core is defective, it can be replaced, or a material with better surface performance can be preferred to make the roller core, which is economical and durable.

[0187] Referring to Figure 6 , Figure 8 and Figure 10 , the first roller 1 includes a first roller core 11 and a first roller sleeve 12, and the first roller sleeve 12 is circumferentially formed with an annular groove 13.

[0188] Of course, referring to Figure 8 , the second roller 2 can be provided to include a second roller core 21 and a second roller sleeve 22, and the second roller sleeve 22 can be circumferentially formed with annular protrusions 23.

[0189] In some embodiments, the roll sleeve and the roll core can be connected by a single key or spline (not shown in the figures), the roll core is provided with a circlip at both ends of the roll sleeve, or the roll core is provided with a shaft shoulder at one end of the roll sleeve and a circlip at the other end of the roll sleeve. The single key or spline allows the roll sleeve and the roll core to not rotate relative to each other in the circumferential direction and facilitates the assembly and disassembly of the roll sleeve on the roll core. The shaft shoulder and the circlip cooperate to prevent the roll sleeve from sliding in the axial direction of the roll core.

[0190] In other embodiments, the roll sleeve and the roll core are connected by a thread, the roll core is provided with a lock nut at both ends of the roll sleeve, or the roll core is provided with a shaft shoulder at one end of the roll sleeve and a lock nut at the other end of the roll sleeve. The thread allows the roll sleeve to be assembled and disassembled on the roll core, and the lock nut and the roll sleeve prevent the roll sleeve from sliding in the axial direction of the roll core.

[0191] In some embodiments, the width of the groove 13 increases in the direction from the bottom wall of the groove 13 to the opening of the groove 13. Referring to Figures 6 to 11 , the groove 13 has a structure of being wider at the top and narrower at the bottom, which makes it easier for the workpiece in the groove 13 to be demolded.

[0192] Here, the width is the distance between the opposite side walls in the direction from the bottom wall of the groove 13 to the opening of the groove 13, i.e., in the longitudinal direction of the groove 13. The width can gradually increase or increase in steps.

[0193] Referring to Figure 6 and Figure 7 , the side wall of the groove 13 includes a circular annular surface segment perpendicular to the bottom wall of the groove 13 and a conical surface segment forming an included angle with the circular annular surface segment, and the circular annular surface segment is connected to the bottom wall of the groove 13; referring to Figure 8 and Figure 9 , the side wall of the groove 13 includes a circular annular surface segment perpendicular to the bottom wall of the groove 13 and a conical surface segment forming an included angle with the circular annular surface segment, and the conical surface segment is connected to the bottom wall of the groove 13; referring to Figure 10 and Figure 11 , the side wall of the groove 13 is a conical surface.

[0194] In some embodiments, at least one side wall of the groove 13 is configured with an inclined surface forming an included angle of 94°-96° with the bottom wall of the groove 13. The angle range formed by the inclined surface and the bottom wall of the groove 13 has little effect on the structure of the side edge of the workpiece and also facilitates the demolding of the workpiece.

[0195] Referring to Figures 6 to 9 , the circular annular surface segment and the conical surface segment form an included angle of 184°-186°; referring to Figure 10 and Figure 11 , the conical surface forms an included angle of 94°-96° with the bottom wall.

[0196] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A metal material composite processing method characterized by, The method comprises the following steps: contacting a first surface of a first plate body with a second surface of a second plate body; placing the first plate body and the second plate body in a groove on a circumference of a first roller, and contacting a third surface of the second plate body with a bottom wall of the groove, wherein the third surface is opposite to the second surface, and the first plate body has a higher hardness than the second plate body; controlling the first roller and a second roller to rotate to roll the first plate body and the second plate body to form a composite plate, wherein, during the rolling process, a fourth surface of the first plate body is in contact with a surface of the second roller, and the fourth surface is opposite to the first surface; before the step of contacting the first surface of the first plate body with the second surface of the second plate body, at least one of the first surface and the second surface is roughened to form a plurality of stripes on the at least one surface, and the number of the stripes at a preset interval is greater than or equal to a preset proportion of the total number of the stripes; in the step of roughening at least one of the first surface and the second surface, the at least one surface is rubbed by a roughening friction roller to form the stripes, and the roughening friction roller comprises a steel wire brush roller, the steel wire brush roller works under a pressure of 1 MPa to 1.5 MPa, the diameter of the steel wire brush roller is 250 mm to 400 mm, the rotating speed of the steel wire brush roller is 400 r / min to 600 r / min, the hardness of the steel wire of the steel wire brush roller is HRC 55 to 60, the length of the steel wire is 10 mm to 40 mm, and the diameter of the steel wire is 0.3 mm to 0.5 mm.

2. The metal material composite working method according to claim 1, characterized by, in the step of roughening the first surface, the stripes on the first surface are controlled to have a preset interval of 0.005 mm to 0.03 mm and a preset proportion of 90%.

3. The metal material composite working method according to claim 1, characterized by in the step of roughening the first surface, the stripes on the first surface are controlled to have a preset interval of 0.01 mm to 0.02 mm and a preset proportion of 90%.

4. The metal material composite working method according to claim 1, characterized by in the step of roughening the first surface, the stripes on the first surface are controlled to have a preset interval of 0.01 mm to 0.02 mm and a preset proportion of 80%.

5. The metal material composite processing method according to claim 1, wherein in the step of roughening the first surface, the stripes on the first surface are controlled to have a preset interval of 0.01 mm to 0.02 mm and a preset proportion of 70%.

6. The metal material composite processing method according to claim 1, wherein in the step of roughening the first surface, the stripes on the first surface are controlled to have a preset interval of 0.01 mm to 0.02 mm and a preset proportion of 50%.

7. The metal material composite working method according to claim 1, wherein in the step of roughening at least one of the first surface and the second surface, the at least one surface is rubbed by a roughening friction roller to form the stripes, and the roughening friction roller comprises a grinding wheel, the grit size of the grinding wheel is 40 to 120, and the grinding wheel works under a pressure of 0.1 MPa to 0.5 MPa, and the diameter of the grinding wheel is 200 mm to 400 mm.

8. The metal material composite processing method according to claim 1, characterized by, in the step of roughening the first surface, the debris on the first surface is removed. Or, in the step of roughening the second surface, Remove the debris of the second surface.

9. The metal material composite working method according to claim 1, characterized by, In the step of roughening the first surface, Obtain the number of stripes per unit area of the first surface; Determine that the number of stripes per unit area of the first surface is less than the corresponding preset value, adjust the position of the roughening friction roller for roughening treatment, so that the roughening friction roller fully contacts the first surface; Or, in the step of roughening the second surface, Obtain the number of stripes per unit area of the second surface; Determine that the number of stripes per unit area of the second surface is less than the corresponding preset value, adjust the position of the roughening friction roller for roughening treatment, so that the roughening friction roller fully contacts the second surface.

10. The metal material composite processing method according to claim 1, characterized by, Before the step of controlling the first roller and the second roller to rotate to roll and form the first plate body and the second plate body into a composite plate, it further comprises: Control the first plate body and the second plate body to heat to a preset temperature.

11. The metal material composite processing method according to claim 1, characterized by, After the step of controlling the first roller and the second roller to rotate to roll and form the first plate body and the second plate body into a composite plate, it further comprises: Solid solution treatment is performed on the composite plate; The composite plate after solid solution treatment is subjected to aging treatment.

12. The metal material composite processing method according to claim 11, wherein The solid solution temperature of the solid solution treatment is 480-540℃, and the solid solution time of the solid solution treatment is 45-65min; The aging temperature of the aging treatment is 160-200℃, and the aging time of the aging treatment is 5-7h.

13. The metal material composite processing method according to claim 1, characterized by, Before the step of contacting the first surface of the first plate body with the second surface of the second plate body, it further comprises: The first plate body and the second plate body are pre-prepared to have a thickness ratio of 1.5:1.0; In the step of controlling the first roller and the second roller to rotate to roll and form the first plate body and the second plate body into a composite plate, The allometric ratio of the first roller and the second roller is 1:1.05, and the rolling reduction rate is controlled to be 20%-40%.

14. The metal material composite processing method according to claim 1, characterized by, Before the step of contacting the first surface of the first plate body with the second surface of the second plate body, The roughness of the first surface is pre-prepared to be 0.8Ra-4.0Ra.

15. The metal material composite processing method according to claim 1, characterized by, Before the step of contacting the first surface of the first plate body with the second surface of the second plate body, The roughness of the second surface is pre-prepared to be 4Ra-10Ra.

16. The metal material composite processing method according to claim 1, characterized by, The first plate body is a stainless steel plate, and the second plate body is an aluminum plate.

17. The metal material composite processing method according to claim 1, characterized by, In the step of controlling the first roller and the second roller to roll and form the first plate body and the second plate body into a composite plate, The shear strength t of the composite board is made = a * b * K1 * K2 * σ 软 , Wherein, a is the length of the first plate body, b is the width of the first plate body, K1 is the roughening area ratio of the first plate body, the value range of K1 is 1.5-3; K2 is the combination rate of the first plate body and the second plate body, the value range of K2 is 0.15-0.3, when K1*K2>1, the product of K1 and K2 is all valued as 1; the σ 软 is the yield strength of the second plate body, the value range of σ 软 is 350Mpa ~412Mpa.

18. The metal material composite processing method according to claim 1, characterized by, Before the step of roughening the first surface, The first plate body is pre-prepared to be long strip-shaped; In the step of roughening the first surface, The length direction of the stripes of the first surface is controlled to form a first preset included angle with the width direction of the first plate body; Or, before the step of roughening the second surface, The second plate body is pre-prepared to be long strip-shaped; In the step of roughening the second surface, The length direction of the stripes of the second surface is controlled to form a second preset included angle with the width direction of the second plate body.

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