A copper rod hot rolling device and a copper rod detection method thereof

Abstract

The present application relates to metal rolling technical field, especially to a copper rod hot rolling device and a copper rod detection method thereof, the device comprises a first hot rolling mechanism, a second hot rolling mechanism, a third hot rolling mechanism and a fourth hot rolling mechanism, the mechanism comprises a hollow rack and at least three pressure roller assemblies that can be gathered in the center of the rack, the pressure roller assembly comprises a swing arm rotatably connected to the rack at one end, a roller fixed to the other end of the swing arm and a driving member for driving the swing arm to move, the radial end face of the roller is gathered in the center of the rack to form a circular rolling profile, wherein at least one roller in the pressure roller assembly on the first hot rolling mechanism, the second hot rolling mechanism and the third hot rolling mechanism has an arc-shaped groove arranged concave on the rolling surface, the copper rod forms a radial convex ridge when passing through the arc-shaped groove, and the ridge is flattened on the next hot rolling mechanism. Through the structure design, the local stress concentration is reduced, and the cracks or fractures generated during the hot rolling of the copper rod are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal rolling, in particular to a copper rod hot rolling device and a copper rod detection method thereof. BACKGROUND

[0002] The hot rolling process of the copper rod is a key step in the production process of the copper rod, and its main purpose is to change the heated copper ingot into a copper rod with a certain size and requirements through multiple rolling. The process of hot rolling generally includes rough rolling, multi-pass rolling, cooling, drawing, etc. However, in the process of hot rolling, due to extrusion, if the parameters such as pressure, speed and roll gap are improper during rolling, it may cause excessive deformation of the copper rod in some areas, generate a large stress, especially in the early or late stages of rolling, which may not be effectively released, ultimately leading to breakage.

[0003] In the prior art, in order to avoid breakage caused by stress concentration, the number of rolling passes is generally increased during rolling, so that the thickness of the copper rod changes slowly during rolling, and the rolling speed and pressure are reduced, so as to ensure that the deformation of the copper rod is uniform and avoid local excessive deformation and stress concentration.

[0004] However, the above scheme needs more passes of hot rolling, which makes the occupation space of the copper rod hot rolling equipment larger, and on the other hand, also reduces the production efficiency of the copper rod. SUMMARY

[0005] In view of at least one of the above technical problems, the present application provides a copper rod hot rolling device and a copper rod detection method thereof, which adopts a structural improvement to reduce stress concentration of the copper rod during rolling.

[0006] According to a first aspect of the present application, a copper rod hot rolling device is provided, comprising a first hot rolling mechanism, a second hot rolling mechanism, a third hot rolling mechanism and a fourth hot rolling mechanism arranged at intervals along a straight line direction, wherein the first hot rolling mechanism, the second hot rolling mechanism, the third hot rolling mechanism and the fourth hot rolling mechanism each comprise a hollow rack and at least three compression roller assemblies which can be gathered to the center of the rack;

[0007] The compression roller assembly comprises a swing arm rotatably connected to one end of the rack, a roll fixed to the other end of the swing arm, and a driving member for driving the swing arm to move towards or away from the center of the rack, wherein one end of the driving member is rotatably connected to the rack, and the other end is rotatably connected to the swing arm, and the radial end faces of the at least three rolls are gathered to form a circular rolling profile when the center of the rack;

[0008] At least one of the rolling faces of the rolls in the roll assembly of the first, second and third hot rolling mechanisms has an arc-shaped groove arranged concavely, and when the copper rod passes through the arc-shaped groove, a radial protruding ridge is formed, and the ridge is flattened on the next hot rolling mechanism.

[0009] Further, the roll assembly of the first, second and third hot rolling mechanisms each has the arc-shaped groove on the roll, and the three arc-shaped grooves are not on the same straight line.

[0010] Further, the arc-shaped grooves are arranged on one of the rolls in the roll assembly of the first, second and third hot rolling mechanisms, and the three arc-shaped grooves are arranged in sequence and staggered.

[0011] Further, the diameters of the circular rolling profiles formed by the rolls of the first, second and third hot rolling mechanisms gradually decrease, and the diameter of the circular rolling profile formed by the roll of the fourth hot rolling mechanism is the set diameter of the copper rod.

[0012] Further, the arc-shaped groove includes an arc segment arranged in the middle and a transition segment arranged at both ends of the arc segment, the bending direction of the arc segment is the same as the bending direction of the rolling face of the roll, and the curvature of the arc segment is smaller than the curvature of the rolling face of the roll.

[0013] Further, the transition segments are symmetrically arranged on both sides of the arc segment, the bending direction of the transition segment is opposite to the bending direction of the arc segment, and the two ends of the transition segment are respectively tangent to the arc segment and the circle on which the rolling face of the roll is located.

[0014] Further, there is a temperature detector between the first and second hot rolling mechanisms, which is vertically arranged towards the ridge formed on the copper rod between the two, for detecting the temperature of the ridge on the copper rod.

[0015] Further, there is a laser straightness detector between the second and third hot rolling mechanisms, which is vertically arranged towards the ridge formed on the copper rod between the two, and the light curtain of the laser straightness detector covers the upper surface of the ridge.

[0016] Further, there is an image acquisition device between the third and fourth hot rolling mechanisms, which is vertically arranged towards the front surface of the ridge formed on the copper rod between the two, for identifying surface defects on the ridge.

[0017] According to the second aspect of the present application, a copper rod detection method for the copper rod hot rolling device is provided, which comprises the following steps:

[0018] synchronously drive the first hot rolling mechanism, the second hot rolling mechanism, the third hot rolling mechanism and the fourth hot rolling mechanism to operate;

[0019] When the copper rod passes through the first hot rolling mechanism, the temperature of the convex strip on the copper rod is detected in real time by a temperature detector, and the temperature change is compared, and if the temperature difference is greater than a set threshold, laser marking is performed;

[0020] When the copper rod passes through the second hot rolling mechanism, the straightness of the upper surface of the convex strip on the copper rod is detected by a laser straightness detector, and if the straightness is less than a set threshold, laser marking is performed;

[0021] When passing through the third hot rolling mechanism, a front view of the convex strip of the copper rod is collected by a real-time image acquisition device, and if surface defects are detected, laser marking is performed.

[0022] The beneficial effects of the present application are: through the setting of the arc-shaped groove on the compression roller of the first hot rolling mechanism, the second hot rolling mechanism and the third hot rolling mechanism, the copper rod is formed with a convex strip on the arc-shaped groove when the size of the copper rod is reduced by rolling and extrusion, and then the stress concentration caused by excessive deformation can be reduced by the metal fluidity, reducing the risk of fracture; and after the convex strip is formed, it is flattened in the next pass, and through the setting of this structure, the deformation process of the copper rod can be optimized, and the occupied space of the copper rod hot rolling equipment is reduced without additional rolling passes. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments 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 only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0024] Figure 1 It is a structure schematic view of the copper rod hot rolling device in the embodiment of the present application;

[0025] Figure 2 It is a front view of the fourth hot rolling mechanism in the embodiment of the present application;

[0026] Figure 3 It is a front view of the first hot rolling mechanism in the embodiment of the present application (omitting the front frame);

[0027] Figure 4 It is a structure schematic view of the local enlargement at A in Figure 3

[0028] Figure 5 ​A schematic view of a forming structure of a copper rod in a hot pressing process in the embodiment of the present application;

[0029] Figure 6 A schematic view of a forming structure of a copper rod in a hot pressing process in the embodiment of the present application; Figure 5 A sectional view of B-B in the embodiment of the present application;

[0030] Figure 7 A schematic view of a partial enlarged structure of an arc-shaped groove in the embodiment of the present application;

[0031] Figure 8 A schematic view of an arrangement structure of a detection device in a copper rod hot rolling device in the embodiment of the present application;

[0032] Figure 9 A step flow chart of a copper rod detection method of a copper rod hot pressing device in the embodiment of the present application.

[0033] Reference signs:

[0034] 1, first hot rolling mechanism; 11, rack; 12, compression roller assembly; 121, swing arm; 122, roller; 122a, arc-shaped groove; 122a1, arc segment; 122a2, transition segment; 123, driving member; 2, second hot rolling mechanism; 3, third hot rolling mechanism; 4, fourth hot rolling mechanism; 5, convex strip; 6, temperature detector; 7, laser straightness detector; 8, image acquisition device. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments of the present application.

[0036] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right", and the like as used herein are used for illustration only and are not intended to limit the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0038] As shown in the drawings, Figures 1 to 6The shown copper rod hot rolling device comprises a first hot rolling mechanism, a second hot rolling mechanism, a third hot rolling mechanism and a fourth hot rolling mechanism arranged in a linear direction, the first hot rolling mechanism, the second hot rolling mechanism, the third hot rolling mechanism and the fourth hot rolling mechanism each comprise a hollow arranged rack and at least three press roller assemblies which can be gathered in the center of the rack; as shown in Figure 1 The centers of the four hot rolling mechanisms are in the same straight line, so that the copper rod can pass through and be extruded by the press roller assemblies.

[0039] Specifically, please refer to Figure 2 and Figure 3 In the embodiment of the present application, the press roller assembly comprises a swing arm rotatably connected to the rack at one end, a roller fixed to the other end of the swing arm, and a driving member for driving the swing arm to move towards the center of the rack or away from the center of the rack, one end of the driving member is rotatably connected to the rack, and the other end is rotatably connected to the swing arm, and the radial end faces of the at least three rollers are gathered in the center of the rack to form a circular rolling profile; the circular rolling profile here is the face of the copper rod extruded by the three rollers on the same hot rolling mechanism towards the center, as shown in Figure 4 When the three rollers are close to the center, a circle can be formed; through the setting of this kind of structure, the quality of the surface of the copper rod can be improved to be more uniform, and irregular deformation and dimensional error can be reduced.

[0040] In the embodiment of the present application, at least one of the rollers in the press roller assemblies of the first hot rolling mechanism, the second hot rolling mechanism and the third hot rolling mechanism has an arc-shaped groove arranged concavely on the rolling face, and when the copper rod passes through the arc-shaped groove, a radial protruding ridge is formed and the ridge is flattened on the next hot rolling mechanism. Please refer to Figure 5 and Figure 6 In the embodiment of the present application, through the setting of the arc-shaped groove, when the copper rod is deformed by extrusion, if the straightness of the copper rod is inclined or the local stress is too large due to the structural defects of the copper rod itself during extrusion, the local stress which is too large can make the copper rod pass through the arc-shaped groove to form a ridge as shown in Figure 5 and Figure 6The convex strip shown in the figure is moved towards the direction of the arc-shaped groove by the fluidity of the metal when the local stress is too large, thereby buffering the area where the local stress is too large, and the stress is released to a certain extent, thereby reducing the cracks or breakage caused by the local stress being too large. Of course, it should be pointed out here that in the embodiment of the application, the rollers in the first three hot rolling mechanisms are provided with the arc-shaped grooves, and the fourth hot rolling mechanism is not provided with the arc-shaped grooves, and the fourth hot rolling mechanism forms a complete circle, which is used for shaping the copper rod to form a set size after rolling from the fourth hot rolling mechanism. In addition, it should be pointed out here that in the embodiment of the application, the convex strip is flattened in the next hot rolling mechanism after being formed in the last hot rolling mechanism. The flattening refers to forming a surface with the same curvature as the overall diameter of the copper rod. By setting the structure in this way, the surface quality of the copper rod can also be improved.

[0041] In the above embodiment, by setting the arc-shaped grooves on the compression rollers of the first hot rolling mechanism, the second hot rolling mechanism and the third hot rolling mechanism, the convex strip is formed on the arc-shaped grooves when the copper rod is rolled and extruded to a smaller size, thereby reducing the stress concentration caused by excessive deformation by the fluidity of the metal, and reducing the risk of breakage. After the convex strip is formed, it is flattened in the next pass. By setting the structure in this way, the deformation process of the copper rod can be optimized, and additional rolling passes are not required, thereby reducing the occupied space of the copper rod hot rolling equipment.

[0042] On the basis of the above embodiment, in some embodiments of the application, in order to make the stress in the rolling process more uniform, as shown in Figure 1 As shown in the figure, the compression roller assembly of the first hot rolling mechanism, the second hot rolling mechanism and the third hot rolling mechanism has an arc-shaped groove on one roller, and the three arc-shaped grooves are not on the same straight line. The three arc-shaped grooves are not on the same straight line, which means that the arc-shaped grooves are arranged on one of the rollers in the compression roller assembly of the first hot rolling mechanism, the second hot rolling mechanism and the third hot rolling mechanism, and the three arc-shaped grooves are arranged in sequence. That is, as shown in Figure 1As shown in the first hot rolling mechanism, the arc-shaped groove is arranged on the lower roller, the arc-shaped groove on the second hot rolling mechanism is arranged on the right roller, and the arc-shaped groove on the third hot rolling mechanism is arranged on the left roller, so that the convex strip can be formed on the first three hot rolling mechanisms, and the convex strip is flattened in the next pass after being formed in the previous pass. Through the staggered arrangement form, the overall force on the copper rod during each pass can be uniformly distributed, and uneven deformation caused by repeated pressing in the same area can be avoided, so that the copper rod can be more uniformly stressed and deformed during hot rolling. Avoid the situation of too large or too small deformation, compared with the prior art, not only can reduce the hot rolling pass, but also can reduce the stress concentration, prevent surface cracking or breaking, and because the deformation of the copper rod is uniformly distributed in space, the metal flowability of the copper rod is improved, the shape of the copper rod is more stable, and the size accuracy is higher.

[0043] In the embodiment of the present application, the diameters of the circular rolling profiles formed by the rollers on the first, second and third hot rolling mechanisms are gradually reduced, and the diameter of the circular rolling profile formed by the roller on the fourth hot rolling mechanism is the set diameter of the copper rod. Figure 5 and Figure 6 As shown in the first hot rolling mechanism, the arc-shaped groove is arranged on the lower roller, the arc-shaped groove on the second hot rolling mechanism is arranged on the right roller, and the arc-shaped groove on the third hot rolling mechanism is arranged on the left roller, so that the convex strip can be formed on the first three hot rolling mechanisms, and the convex strip is flattened in the next pass after being formed in the previous pass. Through the staggered arrangement form, the overall force on the copper rod during each pass can be uniformly distributed, and uneven deformation caused by repeated pressing in the same area can be avoided, so that the copper rod can be more uniformly stressed and deformed during hot rolling. Avoid the situation of too large or too small deformation, compared with the prior art, not only can reduce the hot rolling pass, but also can reduce the stress concentration, prevent surface cracking or breaking, and because the deformation of the copper rod is uniformly distributed in space, the metal flowability of the copper rod is improved, the shape of the copper rod is more stable, and the size accuracy is higher.

[0044] In addition, in order to avoid the formation of cracks in the convex strip after the next pass flattening operation, in the embodiment of the present application, the structure of the arc-shaped groove is improved, as shown in Figure 7 The arc-shaped groove includes an arc segment arranged in the middle and a transition segment arranged at both ends of the arc segment, the bending direction of the arc segment is the same as the bending direction of the rolling surface of the roller, and the curvature of the arc segment is smaller than the curvature of the rolling surface of the roller. The arrangement of the arc segment and the solid end helps to smooth the deformation process and avoid local stress concentration caused by sharp curvature change. The design of the transition segment can optimize the metal flow, so that the flow of the copper rod through the first three hot rolling mechanisms is smoother, thereby improving the production efficiency and reducing the quality defects.

[0045] Please continue to refer to Figure 7 In the embodiment of the present application, the transition segments are symmetrically arranged on both sides of the arc segment, and the bending direction of the transition segment is opposite to the bending direction of the arc segment. The two ends of the transition segment are respectively tangent to the arc segment and the circle where the rolling surface of the roller is located. Please refer to Figure 7, through the structure form that the both ends of transition section are tangent to rolling surface and arc section respectively, make transition section form two recesses that recess to the middle, the recess is set, can make the convex strip flow to the recess in the process of being flattened, and then smoothly make the convex strip flow deformation to the recess, form the same curvature as the curvature of copper rod body, through the setting of this kind of structure form, provide deformation space for the deformation of convex strip, and then can further guarantee the surface quality of product.

[0046] In the embodiment of the application, in addition to reducing stress concentration by forming convex strips in the arc-shaped groove of the roller, the formed convex strips are also used for detection, please refer to Figure 8 In the embodiment of the application, the first hot rolling mechanism and the second hot rolling mechanism have a temperature detector vertically arranged to the convex strip formed on the copper rod between the two, which is used to detect the temperature of the convex strip on the copper rod. It should be pointed out that in the embodiment of the application, since the size of the copper rod gradually becomes smaller in the rolling process, the size of the convex strip also gradually becomes smaller, and in the first hot rolling mechanism, the size of the convex strip is the largest. Since the curvature of the arc-shaped groove is smaller than the curvature of the copper rod, the temperature on the convex strip is more obvious than the rest of the copper rod. By detecting the convex strip formed by the first hot rolling mechanism through the temperature detector, the change of the temperature of the copper rod can be more obviously reflected. Therefore, the temperature distribution uniformity is detected through the convex strip, and the detection effect is more obvious than detecting the copper rod. It should be pointed out that in the embodiment of the application, the temperature detector has various forms, for example, it can be detected by an infrared temperature controller, which can be selected by those skilled in the art as needed, and will not be described here.

[0047] Please continue to refer to Figure 8 In the embodiment of the application, the second hot rolling mechanism and the third hot rolling mechanism have a laser straightness detector vertically arranged to the convex strip formed on the copper rod between the two, and the light curtain of the laser straightness detector covers the upper surface of the convex strip. It should be pointed out that as the size of the convex strip gradually decreases, the deformation of the copper rod will gradually approach the final size. In the embodiment of the application, the straightness of the copper rod is detected through the convex strip formed on the second hot rolling mechanism, which can more clearly find out whether the copper rod is bent or deformed through the change of the convex strip shape, which is beneficial to optimize the rolling parameters. It should be pointed out that the laser straightness detector is prior art, and its working principle and structure will not be described here.

[0048] In addition, in the embodiment of the present application, there is an image acquisition device between the third hot rolling mechanism and the fourth hot rolling mechanism, which is perpendicular to the copper rod between the two and irradiates the front surface of the convex stripe formed on the copper rod, and the image acquisition device is used to identify the surface defects on the convex stripe. In the embodiment of the present application, the size of the convex stripe formed on the third hot rolling mechanism is the smallest after the copper rod is rolled twice, but because the curvature of the convex stripe is smaller than the curvature of the copper rod, the surface defects on the copper rod are also the most magnified on the copper rod, and the size of the copper rod here is close to the final size of the copper rod, so that the detection of the surface defects can achieve the most accurate effect. As can be seen, in the embodiment of the present application, the convex stripe formed on the copper rod can not only reduce the internal stress concentration, but also can act as an amplifier to capture the temperature, straightness and surface defects on the copper rod more clearly, so as to improve the reliability of the copper rod detection and finally lay a good foundation for the quality of the copper rod. Of course, it should be pointed out here that the above detector is a prior art, and fixing it on the rack is also a basic skill of those skilled in the art, which will not be described in detail here.

[0049] As shown in Figure 9 In the embodiment of the present application, a copper rod detection method of the copper rod hot rolling device is also provided, which has been described above and can be understood by those skilled in the art, including the following steps:

[0050] S10: synchronously driving the first hot rolling mechanism, the second hot rolling mechanism, the third hot rolling mechanism and the fourth hot rolling mechanism to operate;

[0051] S20: after the copper rod passes through the first hot rolling mechanism, the temperature of the convex stripe on the copper rod is detected in real time by the temperature detector, and the change of the temperature is compared, and if the temperature difference is greater than a set threshold, laser marking is performed;

[0052] S30: after the copper rod passes through the second hot rolling mechanism, the straightness of the surface of the convex stripe on the copper rod is detected by the laser straightness detector, and if the straightness is less than a set threshold, laser marking is performed;

[0053] S40: after passing through the third hot rolling mechanism, the front view of the convex stripe on the copper rod is acquired by the real-time image acquisition device, and if a surface defect is detected, laser marking is performed. Of course, it should be pointed out here that laser marking is a prior art, which forms a mark on the surface of the copper rod by laser irradiation, so as to facilitate subsequent cutting and recycling of the copper rod.

[0054] Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A copper rod hot rolling device, characterized by, The device comprises a first hot rolling mechanism, a second hot rolling mechanism, a third hot rolling mechanism and a fourth hot rolling mechanism arranged in a straight line direction, each of the first hot rolling mechanism, the second hot rolling mechanism, the third hot rolling mechanism and the fourth hot rolling mechanism comprises a hollow frame and at least three roller assemblies which can be gathered in the center of the frame; The roller assembly comprises a swing arm rotatably connected to one end of the frame, a roller fixed to the other end of the swing arm, and a driving member for driving the swing arm to move towards or away from the center of the frame, one end of the driving member is rotatably connected to the frame, and the other end is rotatably connected to the swing arm, and the radial end faces of the at least three rollers are gathered in the center of the frame to form a circular rolling profile; Among the roller assemblies on the first hot rolling mechanism, the second hot rolling mechanism and the third hot rolling mechanism, at least one of the rollers has an arc-shaped groove arranged concave on the rolling surface, and when the copper rod passes through the arc-shaped groove, a radial protruding ridge is formed, and the ridge is flattened on the next hot rolling mechanism; Among the roller assemblies of the first hot rolling mechanism, the second hot rolling mechanism and the third hot rolling mechanism, there is one roller with the arc-shaped groove, and the three arc-shaped grooves are not on the same straight line; The arc-shaped groove is arranged on one of the rollers in the roller assembly on the first hot rolling mechanism, the second hot rolling mechanism and the third hot rolling mechanism, and the three arc-shaped grooves are arranged in sequence and staggered; The diameters of the circular rolling profiles formed by the rollers on the first hot rolling mechanism, the second hot rolling mechanism and the third hot rolling mechanism gradually decrease, and the diameter of the circular rolling profile formed by the rollers on the fourth hot rolling mechanism is the set diameter of the copper rod; The arc-shaped groove comprises an arc segment arranged in the middle and a transition segment arranged at both ends of the arc segment, the bending direction of the arc segment is the same as the bending direction of the rolling surface of the roller, and the curvature of the arc segment is smaller than the curvature of the rolling surface of the roller; The transition segments are symmetrically arranged on both sides of the arc segment, the bending direction of the transition segment is opposite to the bending direction of the arc segment, and the two ends of the transition segment are respectively tangent to the arc segment and the circle where the rolling surface of the roller is located.

2. The copper rod hot rolling device according to claim 1, wherein The first hot rolling mechanism and the second hot rolling mechanism have a temperature detector arranged vertically to the ridge formed on the copper rod between them, which is used to detect the temperature of the ridge on the copper rod.

3. The copper rod hot rolling device according to claim 2, wherein The second hot rolling mechanism and the third hot rolling mechanism have a laser straightness detector arranged vertically to the ridge formed on the copper rod between them, and the light curtain of the laser straightness detector covers the upper surface of the ridge.

4. The copper rod hot rolling device according to claim 3, wherein The third hot rolling mechanism and the fourth hot rolling mechanism have an image acquisition device arranged vertically to the copper rod between them and irradiating the front surface of the ridge formed on the copper rod, and the image acquisition device is used to identify surface defects on the ridge.

5. A copper rod detection method for the copper rod hot rolling apparatus according to claim 4, characterized by, The device comprises the following steps: Synchronously drive the first hot rolling mechanism, the second hot rolling mechanism, the third hot rolling mechanism and the fourth hot rolling mechanism to operate; After the copper rod passes through the first hot rolling mechanism, the temperature of the convex strip on the copper rod is detected in real time by a temperature detector, and the temperature change is compared, and if the temperature difference is greater than a set threshold, laser marking is performed; After the copper rod passes through the second hot rolling mechanism, the straightness of the upper surface of the convex strip of the copper rod is detected by a laser straightness detector, and if the straightness is less than a set threshold, laser marking is performed; After passing through the third hot rolling mechanism, a front view of the convex strip of the copper rod is acquired by a real-time image acquisition device, and if surface defects are detected, laser marking is performed.

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