Composite processing methods for metal materials

Abstract

A method for composite processing of metal materials includes: bringing a first surface (31) of a first plate (3) into contact with a second surface (41) of a second plate (4); placing the first plate and the second plate in a circumferential groove (13) of a first roller (1), with the third surface (42) of the second plate in contact with the bottom wall of the groove, the third surface being opposite to the second surface, and the hardness of the first plate being greater than that of the second plate; controlling the rotation of the first roller and the second roller (2) to roll-press the first plate and the second plate into a composite plate (5), wherein during the rolling process, the fourth surface (32) of the first plate is in contact with the surface of the second roller, the fourth surface being opposite to the first surface. This method for composite processing of metal materials avoids the generation of burrs and flash on the sides of the composite plate by placing the first plate and the second plate in a groove for processing.

Description

Technical Field

[0001] This invention relates to the field of materials processing technology, and in particular to a method for composite processing of metal materials. Background Technology

[0002] Metal composite rolling is a processing method that combines metals with different physical and chemical properties by rolling them together to firmly bond them together across the entire contact surface. Composite workpieces obtained through rolling often have defects such as burrs and flash, which need to be addressed in subsequent production processes, significantly increasing production costs.

[0003] Taking steel-aluminum alloy composite rolling as an example, related technologies use a four-roll rolling mill, which includes two work rolls and two side rolls. The two work rolls roll-form the steel-aluminum alloy, while the two side rolls roll the sides of the composite workpiece during or after forming. During operation, the side rolls should not press tightly against the sides of the work rolls to avoid excessive friction between them, which could damage the rolling mill. This can make it difficult to guarantee the width of the composite workpiece. Furthermore, if the side rolls are not pressed tightly enough or the raw material has a large dimensional deviation, the composite workpiece is more prone to burrs and flash in the width direction. Summary of the Invention

[0004] This invention provides a method for composite metal processing to solve the problems of low processing accuracy and easy generation of flash and burrs in the existing rolling process. By placing the first plate and the second plate in the groove for processing, flash and burrs can be avoided on the side of the composite plate.

[0005] This invention provides a method for composite processing of metal materials, comprising:

[0006] The first surface of the first plate is brought into contact with the second surface of the second plate;

[0007] The first plate and the second plate are placed in the groove around the first roll, and the third surface of the second plate is in contact with the bottom wall of the groove, wherein the third surface is opposite to the second surface, and the hardness of the first plate is less than that of the second plate.

[0008] The first and second rolls are controlled to rotate to roll-press the first and second plates into a composite plate. During the rolling process, the fourth surface of the first plate is in contact with the surface of the second roll, and the fourth surface is opposite to the first surface.

[0009] According to a metal composite processing method provided by the present invention, prior to the step of contacting the first surface of the first plate with the second surface of the second plate...

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

[0011] According to the metal composite processing method provided by the present invention, in the first surface roughening treatment step,

[0012] The stripes on the first surface are controlled within a preset spacing of 0.005mm-0.03mm, with a preset proportion of 90%.

[0013] According to the metal composite processing method provided by the present invention, in the first surface roughening treatment step,

[0014] The stripes on the first surface are controlled within a preset spacing of 0.01mm-0.02mm; the preset ratio is 90%.

[0015] According to the metal composite processing method provided by the present invention, in the first surface roughening treatment step,

[0016] The stripes on the first surface are controlled at a preset spacing of 0.01mm-0.02mm, with a preset proportion of 80%.

[0017] According to the metal composite processing method provided by the present invention, in the first surface roughening treatment step,

[0018] The stripes on the first surface are controlled at a preset spacing of 0.01mm-0.02mm, with a preset proportion of 70%.

[0019] According to the metal composite processing method provided by the present invention, in the first surface roughening treatment step,

[0020] The stripes on the first surface are controlled within a preset spacing of 0.01mm-0.02mm, and the preset proportion is 50%.

[0021] According to the present invention, in the step of roughening at least one of the first surface and the second surface, a composite metal processing method is provided.

[0022] Stripes are formed by rubbing at least one of the first surface and the second surface with a texturing friction roller. The texturing friction roller includes an abrasive belt with a linear speed of 9-10 m / s, a titanium flat strip speed of 4-6 m / min, an abrasive belt overlap of 0.02 mm, and a rubber material for the abrasive belt support roller with a hardness of HS60-75.

[0023] According to the present invention, in the step of roughening at least one of the first surface and the second surface, a composite metal processing method is provided.

[0024] Stripes are formed by rubbing at least one of the first surface and the second surface with a texturing friction roller. The texturing friction roller includes a grinding wheel with a sand particle size of 40 to 120. The grinding wheel is subjected to a pressure of 0.1 MPa to 0.5 MPa during operation and has a diameter of 200 mm to 400 mm.

[0025] According to the present invention, in the step of roughening the first surface, a method for composite processing of metal materials is provided.

[0026] Remove debris from the first surface;

[0027] Alternatively, after the step of roughening the second surface, the following steps are also included:

[0028] Remove debris from the second surface.

[0029] According to the present invention, in the step of roughening the first surface, a method for composite processing of metal materials is provided.

[0030] Obtain the number of stripes per unit area on the first surface;

[0031] If the number of stripes per unit area on the first surface is determined to be less than a corresponding preset value, the height of the texturing friction roller is controlled to increase. The texturing friction roller is used to rub and form stripes on the first surface.

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

[0033] Obtain the number of stripes per unit area on the second surface;

[0034] If the number of stripes per unit area on the second surface is determined to be less than a corresponding preset value, the position of the texturing friction roller used for texturing treatment is adjusted so that the texturing friction roller fully contacts the second surface.

[0035] According to a metal material composite processing method provided by the present invention, before the step of controlling the rotation of the first roll and the second roll to roll-press the first plate and the second plate into a composite plate, the method further includes:

[0036] Control the heating of the first plate and the second plate to a preset temperature.

[0037] According to a metal composite processing method provided by the present invention, after the step of controlling the rotation of the first roll and the second roll to roll-press the first plate and the second plate into a composite plate, the method further includes:

[0038] The composite board is subjected to solution treatment;

[0039] The composite board after solution treatment is then subjected to aging treatment.

[0040] According to a metal material composite processing method provided by the present invention, the solution treatment temperature is 480℃~40℃, and the solution treatment time is 45min~65min;

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

[0042] According to a metal composite processing method provided by the present invention, before the step of contacting the first surface of the first plate with the second surface of the second plate, the method further includes:

[0043] The thickness ratio of the first plate to the second plate is 1.5:1.0.

[0044] In the step of controlling the rotation of the first and second rolls to roll-press the first and second plates into a composite board...

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

[0046] According to a metal composite processing method provided by the present invention, prior to the step of contacting the first surface of the first plate with the second surface of the second plate...

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

[0048] According to a metal composite processing method provided by the present invention, prior to the step of contacting the first surface of the first plate with the second surface of the second plate...

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

[0050] According to a metal composite processing method provided by the present invention, the first plate is a titanium plate and the second plate is an aluminum plate.

[0051] According to a metal material composite processing method provided by the present invention, in the step of controlling the first roll and the second roll to roll-press the first plate and the second plate into a composite plate...

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

[0053] Where a is the length of the first plate, b is the width of the first plate, K1 is the roughened area ratio of the first plate, and K1 ranges from 1.5 to 3; K2 is the bonding rate between the first plate and the second plate, and K2 ranges from 0.15 to 0.3. When K1*K2>1, the product of K1 and K2 is 1; the σ 软 σ is the yield strength of the second plate. 软 The value range is 350 MPa to 412 MPa.

[0054] According to a metal composite processing method provided by the present invention, before the first surface roughening treatment step,

[0055] The first plate is prefabricated in a long strip shape;

[0056] In the step of roughening the first surface

[0057] The length direction of the stripes on the first surface is controlled to form a first preset angle with the width direction of the first plate.

[0058] Alternatively, before the second surface roughening treatment step,

[0059] The second plate is prefabricated in a long strip shape;

[0060] In the second surface roughening treatment step

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

[0062] The metal composite processing method provided by the present invention involves placing a first plate and a second plate in the groove of a first roller, using the groove to limit the sides of the first and second plates. Since the first plate has lower hardness, it can effectively prevent the formation of burrs and flash on the sides of the first and second plates. Then, the first and second plates are rolled to form a composite plate, which is less prone to forming burrs and flash. Attached Figure Description

[0063] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

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

[0065] Figure 2 This is a schematic diagram of the structure of the first surface of the first plate being rolled in the metal material composite processing method provided by the present invention;

[0066] Figure 3 This is a schematic diagram of the structure of the second surface of the second plate being rolled in the metal material composite processing method provided by the present invention;

[0067] Figure 4 This is a schematic diagram of the structure of the composite plate obtained by roll forming using the metal material composite processing method provided by the present invention;

[0068] Figure 5 yes Figure 4 A magnified schematic diagram of a portion of the structure at point A.

[0069] Figure 6 This is a cross-sectional structural schematic diagram of the first type of rolling device provided by the present invention;

[0070] Figure 7 yes Figure 6 A magnified schematic diagram of a portion of the structure at point B.

[0071] Figure 8 This is a cross-sectional view of the second type of rolling device provided by the present invention;

[0072] Figure 9 yes Figure 8 A magnified schematic diagram of the structure at part C in the middle;

[0073] Figure 10 This is a cross-sectional view of the third type of rolling device provided by the present invention;

[0074] Figure 11 yes Figure 10 A magnified schematic diagram of the structure of part D in the middle.

[0075] Figure label:

[0076] 1. First roll; 11. First roll core; 12. First roll sleeve; 13. Groove;

[0077] 2. Second roll; 21. Second roll core; 22. Second roll sleeve; 23. Protrusion;

[0078] 3. First plate; 31. First surface; 32. Fourth surface; 33. Stripe;

[0079] 4. Second plate; 41. Second surface; 42. Third surface;

[0080] 5. Composite board. Detailed Implementation

[0081] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0082] An embodiment of the first aspect of the present invention, in conjunction with Figures 1 to 5 As shown, a method for composite processing of metal materials is provided, comprising:

[0083] Step 110: Make the first surface 31 of the first plate 3 into contact with the second surface 41 of the second plate 4;

[0084] The opposing surfaces of the first plate 3 and the second plate 4 come into contact so that the first plate 3 and the second plate 4 are rolled into a composite plate 5.

[0085] Step 120: Place the first plate 3 and the second plate 4 in the groove 13 circumferentially of the first roll 1, and make the third surface 42 of the second plate 4 contact 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 3 is greater than that of the second plate 4.

[0086] The second plate 4 has lower hardness and is prone to deformation under rolling pressure. Placing the second plate 4 at the bottom of the groove 13 allows it to be confined by the sidewalls of the groove 13, preventing burrs and flash from forming on its sides. The first plate 3 is closer to the opening of the groove 13. During rolling, the first plate 3, being harder than the second plate 4, is less likely to overflow the groove 13, effectively preventing burrs and flash from forming on the sides of the second plate 4. Consequently, the composite plate 5 formed by rolling the first plate 3 and the second plate 4 is less prone to burrs and flash.

[0087] The groove 13 is an annular groove surrounding the first roller 1. The first plate 3 and the second plate 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 3 and the second plate 4 are always within the groove 13. The first roller 1 and the second roller 2 cooperate to roll and convey the material. Generally, the first roller 1 is located below the second roller 2. After the first plate 3 and the second plate 4 are placed in the groove 13, the second plate 4 is located below the first plate 3.

[0088] It should be noted that the execution order of steps 110 and 120 above is not limited and can be selected as needed. For example, the first plate 3 and the second plate 4 can be brought into contact first, and then the first plate 3 and the second plate 4 can be placed in the groove 13; or, the second plate 4 can be placed in the groove 13 first, and then the first plate 3 can be placed in the groove 13 so that the second plate 4 is in contact with the first plate 3, that is, the first surface 31 is in contact with the second surface 41.

[0089] Step 130: Control the rotation of the first roll 1 and the second roll 2 to roll-press the first plate 3 and the second plate 4 into a composite plate 5. During the rolling process, the fourth surface 32 of the first plate 3 is in contact with the surface of the second roll 2, and the fourth surface 32 is opposite to the first surface 31.

[0090] The first plate 3 and the second plate 4 are rolled together to form an integral composite plate 5, which has high structural strength and stable quality. After the first roll 1 and the second roll 2 are positioned, the surface of the second roll 2 contacts the fourth surface 32, preparing for the rolling process.

[0091] During the rolling process, the magnitude of the rolling force between the first roll 1 and the second roll 2 can be adjusted according to the characteristics of the first plate 3 and the second plate 4 as well as the processing requirements of the composite plate 5.

[0092] The metal composite processing method of this embodiment places the first plate 3 and the second plate 4 to be processed in the groove 13 of the first roll 1. During the rolling process, the sidewall of the groove 13 limits the first plate 3 and the second plate 4, which can effectively prevent the formation of burrs and flash on the sides of the composite plate 5. In subsequent processes, the process of removing burrs and flash can be omitted, which helps to simplify the processing process, shorten the processing cycle, and reduce the processing cost. Furthermore, by cooperating with the harder first plate 3, the sidewall of the groove 13 limits the entire surface of the softer second plate 4, which can effectively prevent the formation of burrs and flash on the sides of the second plate 4.

[0093] In some embodiments, before step 110, that is, before the step of bringing the first surface 31 of the first plate 3 into contact with the second surface 41 of the second plate 4.

[0094] At least one of the first surface 31 and the second surface 41 is roughened so that at least one of the first surface 31 and the second surface 41 is constructed with multiple stripes 33, with a spacing between adjacent stripes 33, and the number of stripes at a preset spacing is controlled to be greater than or equal to a preset proportion of the total number of stripes.

[0095] Among them, stripe 33 is a groove formed on at least one of the first surface 31 and the second surface 41 after the texturing process, and the depth of the groove is related to the pressure applied during the texturing process. The spacing between adjacent stripes 33 refers to the distance between the bottoms of the two grooves, and the length of stripe 33 is the distance that stripe 33 extends.

[0096] In some embodiments, the first surface 31 is roughened to form multiple stripes 33. The roughening process increases the surface area of ​​the first surface 31, thereby increasing the area during rolling of the first plate 3 and the second plate 4. This results in a higher bonding strength and a more robust bond between the rolled composite plate 5. Specifically, the more uniform the stripes 33 and the smaller the spacing between adjacent stripes 33, the greater the number of stripes 33 per unit area, and the larger the area during rolling of the first plate 3 and the second plate 4. This further enhances the bonding strength of the composite plate 5 after the first plate 3 and the second plate 4 are combined.

[0097] Because the second plate 4 has lower hardness, it will deform during the rolling process. The material of the second plate 4 will enter the grooves of the stripes 33 of the first plate 3. After the first plate 3 cools down, the distance between the stripes 33 will decrease, and the surface of the second plate 4 will be in close contact with the surface of the stripes 33 of the first plate 3, forming an interference fit, thereby tightly bonding the first plate 3 and the second plate 4 together.

[0098] In some embodiments, prior to the roughening process of the first surface 31

[0099] The first plate 3 is prefabricated in a long strip shape.

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

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

[0102] In this embodiment, the preset included angle can be, but is not limited to, 70° to 82°. The stripes 33 on the first surface 31 are used to increase the contact area between the second plate 4 and the first plate 3 during rolling.

[0103] In some embodiments, prior to the roughening process of the second surface 41, the second plate 4 is prefabricated into a strip shape.

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

[0105] The length direction of the stripes on the second surface 41 is controlled to form a second preset angle with the width direction of the second plate 4.

[0106] In this embodiment, the second surface 41 is processed with multiple stripes, and the preset included angle can be, but is not limited to, 70° to 82°. The stripes on the second surface 41 can be used to expel air during the rolling process of the composite plate 5. Since the length direction of the stripes forms a preset angle with the width direction of the second plate 4, the length of the stripes is relatively short. The shorter the stripes are during the rolling of the second plate 4 and the first plate 3, the more effective it is to expel the air between the second plate 4 and the first plate 3, resulting in a higher bonding strength of the composite plate 5. The second plate 4 is elongated.

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

[0108] In the above embodiments, the stripes 33 are straight stripes, which are spaced apart, and the distance between two adjacent stripes 33 can be equal or unequal.

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

[0110] The stripes 33 on the first surface 31 are controlled with a preset spacing 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 stripes 33 accounts for more than 90% of the total number of stripes 33. The preset spacing has a large range, which facilitates the processing of the stripes 33 and also meets the structural requirements of the composite plate 5. At this point, the shear strength of the composite plate 5 can reach 210MPa to 245MPa.

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

[0112] The stripes 33 on the first surface 31 are controlled with a preset spacing 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 two adjacent stripes 33 accounts for more than or equal to 90% of the total number of stripes 33. At this time, the shear strength of the composite plate 5 can reach 200Mpa~230Mpa.

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

[0114] The stripes 33 on the first surface 31 are controlled with a preset spacing of 0.01mm-0.02mm and a preset proportion of 80%. That is, the number of stripes with a distance of 0.01mm-0.02mm between two adjacent stripes 33 accounts for more than or equal to 80% of the total number of stripes 33. At this time, the shear strength of the composite plate 5 can reach 190Mpa~225Mpa.

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

[0116] The stripes 33 on the first surface 31 are controlled with a preset spacing of 0.01mm-0.02mm and a preset proportion of 70%. That is, the number of stripes with a distance of 0.01mm-0.02mm between two adjacent stripes 33 accounts for more than or equal to 70% of the total number of stripes 33. At this time, the shear strength of the composite plate 5 can reach 185Mpa~220Mpa.

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

[0118] The stripes 33 on the first surface 31 are controlled with a preset spacing of 0.01mm-0.02mm and a preset proportion of 50%. That is, the number of stripes with a distance of 0.01mm-0.02mm between two adjacent stripes 33 accounts for more than or equal to 50% of the total number of stripes 33. At this time, the shear strength of the composite plate 5 can reach 170Mpa~210Mpa.

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

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

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

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

[0123] Stripes are formed by rubbing at least one of the first surface 31 and the second surface 41 with a texturing friction roller.

[0124] The texturing process involves forming grooved straight stripes on at least one of the first surface 31 and the second surface 41. The texturing friction roller includes a titanium wire brush roller or a grinding wheel. The texturing process can be performed once, twice, or more times.

[0125] During the contact process between the texturing friction roller and the first surface 31 or the second surface 41, stripes are formed through friction. Since the texturing friction roller rotates at a uniform speed, and the first plate 3 and the second plate 4 move at a uniform speed along the second direction, the stripes formed on at least one of the first surface 31 and the second surface 41 are straight stripes, which are spaced apart. Furthermore, the straight stripes on the first surface 31 form a first preset angle with the width direction of the first plate 3, or the straight stripes on the second surface 41 form a second preset angle with the width direction of the second plate 4.

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

[0127] Abrasive belt, abrasive belt linear speed: 9-10m / s, titanium flat strip speed: 4-6m / min, abrasive belt overlap: 0.02mm, abrasive belt support roller material: rubber, hardness: HS60-75.

[0128] Stripes 33 are formed through friction. Since the texturing friction roller rotates at a constant speed, and the first plate 3 and the second plate 4 move at a constant speed along the second direction, the stripes formed on at least one of the first surface 31 and the second surface 41 are straight stripes. The straight stripes are spaced apart so that they form a preset angle with the width direction of the first plate 3 or the second plate 4. The spacing and ratio between two adjacent stripes meet the above requirements. The texturing process can be performed once, twice, or more times.

[0129] In some embodiments, in the step of roughening at least one of the first surface 31 and the second surface 41

[0130] The texturized friction roller includes a grinding wheel with a grit size of 40 to 120, a working pressure of 0.1 MPa to 0.5 MPa, and a diameter of 200 mm to 400 mm.

[0131] In some embodiments, during the step of roughening the first surface 31

[0132] Remove debris from the first surface 31;

[0133] In some embodiments, during the step of roughening the second surface 41

[0134] Remove debris from the second surface 41.

[0135] During the rotation of the dust removal roller, debris on the first surface 31 or the second surface 41 can be removed. When the first plate 3 or the second plate 4 moves between the upper and lower rows of air jets, the air jets spray high-speed airflow onto the first plate 3 or the second plate 4 to further remove debris from the first surface 31 or the second surface 41, making the surface of the first plate 3 or the second plate 4 clean, ensuring that the camera can obtain clear image information, and avoiding any impact on the composite of the first plate 3 and the second plate 4.

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

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

[0138] If the number of stripes per unit area on the first surface 31 is determined to be less than the corresponding preset value, the position of the texturing friction roller used for texturing treatment is adjusted so that the texturing friction roller fully contacts the first surface 31.

[0139] The control terminal can calculate the number of stripes per unit area based on the acquired 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 command to the controller. The controller controls the lifting component to rise according to the control command, increasing the height of the texturing friction roller so that the texturing friction roller is in close contact with the first surface 31.

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

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

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

[0143] If the number of stripes per unit area on the second surface 41 is determined to be less than the corresponding preset value, the position of the texturing friction roller used for texturing treatment is adjusted so that the texturing friction roller fully contacts the second surface 41.

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

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

[0146] In some embodiments, before the step of controlling the rotation of the first roll 1 and the second roll 2 to roll-press the first plate 3 and the second plate 4 into a composite plate 5, the method further includes:

[0147] Control the heating of the first plate 3 and the second plate 4 to the preset temperature.

[0148] In the process of heating the first plate 3 and the second plate 4, an online heating method is adopted, specifically an eddy current heating method, and the heating temperature of the first plate 3 is 350℃. By adopting an online heating method, the first surface 31 of the first plate 3 and the second surface 41 of the second plate 4 can be rolled and bonded in a semi-molten state, further improving the bonding strength of the composite plate 5.

[0149] In this embodiment of the invention, the first plate 3 is heated online, specifically the titanium plate. The purpose of this heating is to cause the stripes 33 on the first surface 31 to expand due to heat, widening and deepening the grooves of the stripes 33. Then, the heated titanium plate and a lower-hardness aluminum alloy plate are pressed together by upper and lower rollers. Because the hardness of the titanium plate is much greater than that of the aluminum alloy plate, on the composite surface where the aluminum alloy plate and titanium plate are combined, the aluminum alloy plate is pressed into the grooves on the titanium surface. Simultaneously, the titanium plate cools and contracts, while the surface of the aluminum alloy plate heats and expands. This allows the titanium plate and aluminum alloy plate to fit tightly together on both sides of the groove, forming an interference fit, thus creating a tight bond between the titanium plate and the aluminum alloy plate.

[0150] According to an embodiment of the present invention, after the step of controlling the rotation of the first roll 1 and the second roll 2 to roll-press the first plate 3 and the second plate 4 into a composite plate 5, the following step is further included:

[0151] Step 140: Perform solution treatment on composite board 5;

[0152] The solution treatment includes a heating stage and a cooling stage. In the heating stage, the composite board 5 is placed in a solution furnace for solution treatment at a temperature of 480℃ to 540℃ for 45 to 65 minutes. In the cooling stage, the composite board 5 is rapidly cooled to room temperature. This solution treatment further improves the bonding strength of the composite board 5.

[0153] Step 150: The composite board 5 after solution treatment is subjected to aging treatment.

[0154] After solution treatment, composite board 5 requires aging treatment. The aging treatment is carried out in an aging furnace at an aging temperature of 160℃~200℃ for 5h~7h. Aging treatment of the composite board can further improve its bonding strength.

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

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

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

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

[0159] Among them, the first roll 1 and the second roll 2 can be asynchronous rolling. Asynchronous rolling refers to the process of rolling titanium plate and aluminum alloy plate (i.e., first plate body 3 and second plate body 4) into composite plate by rolling them with upper and lower rolls. The rotation speeds of the first roll 1 and the second roll 2 are different.

[0160] In some embodiments, prior to step 110, that is, before the step of bringing the first surface 31 of the first plate 3 into contact with the second surface 41 of the second plate 4...

[0161] The surface roughness of the first surface 31 is pre-set to be 0.8Ra to 4.0Ra. Where Ra is the arithmetic mean roughness.

[0162] By controlling the surface roughness of the first surface 31, the contact area between the first surface 31 and the second surface 41 can be guaranteed, thereby ensuring the roll-pressing and fixing effect of the first plate 3 and the second plate 4.

[0163] In some embodiments, prior to step 110, before the step of bringing the first surface 31 of the first plate 3 into contact with the second surface 41 of the second plate 4,

[0164] The surface roughness of the second surface 41 is pre-set to be 4Ra to 10Ra. Where Ra is the arithmetic mean roughness.

[0165] The first surface 31 and the second surface 41 work together to effectively improve the hardness of the composite board 5, meet the processing requirements of the composite board 5, and thus meet the needs of making mobile phone frames.

[0166] In some embodiments, prior to step 110, before the step of bringing the first surface 31 of the first plate 3 into contact with the second surface 41 of the second plate 4,

[0167] The first plate 3 is pre-formed to a hardness of HV 270–330. Here, HV is Vickers hardness, measured in kg / mm². 2 .

[0168] Vickers hardness is defined as the ratio of the load applied when a diamond indenter is pressed into the surface of a sample with a certain load and held for a certain period of time before the test force is unloaded to the area of ​​the indentation formed on the sample surface.

[0169] The hardness of the first plate 3 is pre-set to HV 270~330, so that the hardness of the processed composite plate 5 meets the requirements.

[0170] In some embodiments, step 130 involves controlling the first roll 1 and the second roll 2 to roll-press the first plate 3 and the second plate 4 into a composite plate 5.

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

[0172] Where a is the length of the second plate 4, b is the width of the second plate 4, K1 is the roughened area ratio of the second plate 4, and the value of K1 ranges from 1.5 to 3; K2 is the bonding rate between the first plate 3 and the second plate 4, and the value of K2 ranges from 0.15 to 0.3. When K1*K2>1, the product of K1 and K2 is 1; σ 软 σ is the yield strength of the first plate 3. 软 The value range is 350-412 MPa.

[0173] Composite board 5 can be used in applications such as mobile phone frames that require high shear strength.

[0174] In some embodiments, the first plate 3 is a titanium plate, and the second plate 4 is an aluminum plate. The titanium plate and the aluminum plate are rolled together to form a composite plate 5, which optimizes the shear strength of the composite plate 5, making the composite plate 5 more robust.

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

[0176] Of course, the materials of the first plate 3 and the second plate 4 are not limited to these; they will be determined based on actual needs. The following will combine... Figures 1 to 5 A specific embodiment of the present invention is described: The composite plate 5 is formed by rolling a first plate 3 and a second plate 4. The first plate 3 is a titanium plate, and the second plate 4 is an aluminum plate. Stripes 33 are formed on the first surface 31 of the titanium plate. The stripes 33 are straight stripes, spaced apart. Stripes with a distance of 0.02 mm between adjacent stripes account for more than 90% of the total number of stripes. The titanium plate is elongated, and the length direction of the stripes 33 forms a 78° angle with the width direction of the titanium plate. The hardness of the titanium plate is HV300, and the roughness of the first surface 31 of the titanium plate is 2Ra.

[0177] The second surface 41 of the aluminum alloy plate also has stripes, and the thickness ratio of the titanium plate to the aluminum alloy plate is 1.5:1.0. The stripes on the aluminum alloy plate are also straight stripes, which are spaced apart. Stripes with a distance of 0.02 mm between adjacent stripes account for more than 90% of the total number of stripes. The aluminum alloy plate is also elongated, and the length direction of the stripes forms a 78° angle with the width direction of the aluminum alloy plate. The roughness of the second surface 41 of the aluminum alloy plate is 3Ra.

[0178] The first surface 31 of the titanium plate and the second surface 41 of the aluminum alloy plate are rolled together to form a composite plate 5. The shear strength of the composite plate 5 satisfies a*b*K1*K2*σ. 软 , where a is the length of the titanium plate, b is the width of the titanium plate, K1 is the roughened area ratio of the titanium plate, and K1's value ranges from 2; K2 is the bonding ratio between the titanium plate and the aluminum alloy plate, and K2's value ranges from 0.2. When K1*K2>1, the product of K1 and K2 is always 1; σ_soft is the yield strength of the aluminum alloy plate, σ_soft 软 The value range is 380 MPa.

[0179] By roughening the first surface 31 of the first plate 3 to form stripes 33, the rolling area between the second plate 4 and the first plate 3 is increased, resulting in a higher bonding strength and a more robust bond in the composite plate 5 formed by the combination of the second plate 4 and the first plate 3. The composite plate 5 produced by rolling in this embodiment of the invention can withstand greater shear force, and the bonding of the composite plate 5 is more tight, resulting in a robust structure that meets design requirements. The composite plate 5 can be used as a material for processing mobile phone frames, satisfying requirements such as low signal shielding and low strength-to-weight ratio in mobile phone manufacturing.

[0180] An embodiment of the second aspect of the present invention, in conjunction with Figures 6 to 11 As shown, a rolling device is also provided, including a first roll 1 and a second roll 2. The first roll 1 is constructed with a circumferentially arranged groove 13; the second roll 2 is adapted to cooperate with the first roll 1 for rolling.

[0181] The first roll 1 and the second roll 2 rotate relative to each other to roll and convey the workpiece. The first roll 1 has a groove 13 around its circumference so that the workpiece is always kept within the groove 13 during the rolling process. The wall of the groove 13 limits the workpiece, which solves the problem of flash and burrs on the side of the workpiece, optimizes the rolling effect, and saves the process of removing flash and burrs.

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

[0183] In some embodiments, reference Figure 6 and Figure 7 As shown, the second roll 2 is constructed with a circumferentially arranged protrusion 23, which is adapted to be inserted into the groove 13. By cooperating with the groove 13, the workpiece in the groove 13 is limited, effectively preventing the workpiece from overflowing from the gap between the first roll 1 and the second roll 2, thereby effectively preventing the formation of burrs and flash on the workpiece.

[0184] The protrusion 23 is arranged circumferentially around the second roll 2. At the position where the first roll 1 and the second roll 2 are rolled, the protrusion 23 needs to cover the opening of the groove 13 to ensure the processing effect.

[0185] In some embodiments, reference Figure 6 , Figure 8 as well as Figure 10 As shown, at least one of the first roll 1 and the second roll 2 includes a roll core and a roll sleeve fitted outside the roll core, which facilitates independent replacement of the roll core or the roll sleeve.

[0186] When defects appear on the surface of the roller core, it can be replaced, or the roller core can be made of materials with better surface properties, which is economical and durable.

[0187] refer to Figure 6 , Figure 8 as well as Figure 10 As shown, the first roll 1 includes a first roll core 11 and a first roll sleeve 12, and the first roll sleeve 12 has an annular groove 13 formed in the circumferential direction.

[0188] Of course, for reference Figure 8 As shown, the second roll 2 can be configured to include a second roll core 21 and a second roll sleeve 22, and the second roll sleeve 22 can be circumferentially formed with annular protrusions 23.

[0189] In some embodiments, the roller sleeve and the roller core can be connected by a single key or spline (not shown in the figure). The roller core is provided with retaining rings at both ends of the roller sleeve, or the roller core is provided with a shoulder at one end of the roller sleeve and a retaining ring at the other end of the roller sleeve. The single key or spline prevents relative rotation between the roller core and the roller sleeve in the circumferential direction and facilitates the installation and removal of the roller sleeve on the roller core. The shoulder and retaining ring cooperate to prevent the roller sleeve from sliding in the axial direction of the roller core.

[0190] In other embodiments, the roller sleeve and the roller core are connected by threads. The roller core has set nuts located at both ends of the roller sleeve, or the roller core has a shoulder located at one end of the roller sleeve and a set nut located at the other end of the roller sleeve. The threaded connection enables the installation and removal of the roller sleeve on the roller core. The setting of the set nuts and the roller sleeve prevents the roller sleeve from sliding axially on the roller core.

[0191] In some embodiments, the width of the groove 13 increases along the bottom wall of the groove 13 toward the opening of the groove 13. (See reference) Figures 6 to 11 As shown, the groove 13 has a structure that is wider at the top and narrower at the bottom, making it easier for the workpiece inside the groove 13 to be demolded.

[0192] The width, extending along the bottom wall of the groove 13 towards its opening (i.e., along the longitudinal direction of the groove 13), is the distance between the two opposing side walls. The width can be increased gradually or in a stepped manner.

[0193] refer to Figure 6 and Figure 7 As shown, the sidewall of the groove 13 includes an annular segment perpendicular to the bottom wall of the groove 13 and a conical segment forming an angle with the annular segment. The annular segment is connected to the bottom wall of the groove 13. (Reference) Figure 8 and Figure 9 As shown, the sidewall of the groove 13 includes an annular segment perpendicular to the bottom wall of the groove 13 and a conical segment forming an angle with the annular segment, the conical segment being connected to the bottom wall of the groove 13; Reference Figure 10 and Figure 11 As shown, the sidewall of the groove 13 is a conical surface.

[0194] In some embodiments, at least one sidewall of the groove 13 is constructed with an inclined surface, the inclined surface forming an angle of 94° to 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 impact on the structure of the side of the workpiece and also facilitates demolding of the workpiece.

[0195] refer to Figures 6 to 9 As shown, the toroidal segment and the conical segment form an angle of 184° to 186°; Reference Figure 10 and Figure 11 As shown, the conical surface forms an angle of 94° to 96° with the bottom wall.

[0196] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

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, the first plate body has a higher hardness than the second plate body, the first plate body is a titanium plate, and the second plate body is an aluminum plate; 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, roughening at least one of the first surface and the second surface to form a plurality of stripes on the at least one of the first surface and the second surface, and spacing the adjacent stripes, and controlling the number of the stripes at the preset spacing to be greater than or equal to a preset proportion of the total number of the stripes.

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 spacing 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 spacing of 0.01 mm to 0.02 mm and a preset proportion of 90%.

4. The metal material composite processing 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 spacing 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 spacing 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 spacing 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 of the first surface and the second surface is rubbed by a roughening friction roller to form the stripes, and the roughening friction roller comprises a sand belt, the linear speed of the sand belt is 9 m / s to 10 m / s, the overlapping amount of the sand belt under pressure is 0.02 mm, and the material of the support roller of the sand belt is rubber with a hardness of HS60 to 75.

8. The metal material composite processing method according to claim 1, characterized by, In the step of roughening at least one of the first surface and the second surface, the at least one of the first surface and the second 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, the pressure of the grinding wheel during operation is 0.1 MPa to 0.5 MPa, and the diameter of the grinding wheel is 200 mm to 400 mm.

9. 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, the debris on the second surface is removed.

10. The metal material composite processing method according to claim 1, characterized by, In the step of roughening the first surface, the number of the stripes per unit area of the first surface is obtained; determining that the number of the striations per unit area of the first surface is less than a corresponding preset value, and adjusting a position of a roughening friction roller used for the roughening treatment so as to make the roughening friction roller sufficiently contact the first surface; or, in the step of roughening treating the second surface, obtaining the number of the striations per unit area of the second surface; determining that the number of the striations per unit area of the second surface is less than a corresponding preset value, and adjusting a position of a roughening friction roller used for the roughening treatment so as to make the roughening friction roller sufficiently contact the second surface.

11. 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 composite plate from the first plate body and the second plate body, the method further comprises: controlling the first plate body and the second plate body to be heated to a preset temperature.

12. 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 composite plate from the first plate body and the second plate body, the method further comprises: solid solution treating the composite plate; age treating the composite plate after the solid solution treatment.

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

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 method 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 composite plate from the first plate body and the second plate body, 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%.

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 first surface is pre-prepared to be 0.8-4.0 Ra.

16. 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 4-10 Ra.

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 composite plate from the first plate body and the second plate body, 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 treating the first surface, The first plate body is pre-prepared to be long strip-shaped. In the step of roughening treating the first surface, The length direction of the striations of the first surface is controlled to form a first preset included angle with the width direction of the first plate body. Before the step of roughening treating the second surface, The second plate body is pre-prepared to be long strip-shaped. In the step of roughening treating the second surface, The length direction of the striations 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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