Trimming device, control method of trimming device, and cylindrical battery

Abstract

The application discloses a trimming device, a control method of the trimming device and a cylindrical battery. The trimming device comprises a fixing mechanism and a grinding mechanism. The fixing mechanism comprises a first driving member and a fixing assembly. The first driving member is configured to drive the fixing assembly to rotate around an axis parallel to a first direction. The grinding mechanism comprises at least two pulleys, a sand belt, a carrier member, a second driving member and a third driving member. An included angle between a plane of a grinding section of the sand belt and the first direction towards the fixing mechanism is α, and the following relationship is satisfied: 40°≤α≤50°. The at least two pulleys are rotatably arranged on the carrier member. The second driving member is connected with the carrier member and is configured to drive the carrier member to rotate around an axis parallel to the pulleys. The third driving member is connected with at least one pulley and is configured to drive the pulley to rotate. The technical scheme can realize rounding of a weld at an edge of a workpiece to be processed, and can remove sharp points or protrusions and other adverse phenomena in the weld area at the edge.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a trimming device, a control method for the trimming device, and a cylindrical battery. Background Technology

[0002] In related technologies, the casing of cylindrical batteries typically includes a casing body and a top cover, with the top cover fitting onto one end of the casing body and being welded together. Furthermore, to prevent rusting at the weld seams between the end faces and side circumferential faces of the casing, UV printing is usually performed on the weld seams.

[0003] However, due to the tendency for sharp points or protrusions to form in the weld area, UV coatings cannot be printed evenly, which can easily lead to the risk of missed coatings. Summary of the Invention

[0004] The main purpose of this application is to provide a trimming device that can round off the weld seams at the edges of the workpiece, remove defects such as sharp points or protrusions in the weld seam area, so that UV coating can be stably applied to the weld seam, enabling uniform printing and reducing the risk of missed coating.

[0005] To achieve the above objectives, the finishing device proposed in this application includes a fixing mechanism and a grinding mechanism. The fixing mechanism includes a first driving member and a fixing component. The fixing component is connected to the first driving member and configured to fix the workpiece to be processed. The first driving member is configured to drive the fixing component to rotate about an axis parallel to a first direction. The grinding mechanism includes at least two pulleys and an abrasive belt. The abrasive belt is wound around the at least two pulleys. The abrasive belt has a grinding section, which is configured to grind the workpiece to be processed located on the fixing component. The plane of the grinding section intersects with the first direction. The angle α formed by the plane of the grinding section and the first direction toward the fixing mechanism is defined as α, satisfying the relationship: 40°≤α≤50°. The grinding mechanism also includes a carrier member, on which at least two pulleys are rotatably disposed. The grinding mechanism also includes a second driving member, which is connected to the carrier member and configured to drive the carrier member to rotate about an axis parallel to the pulleys. The grinding mechanism also includes a third driving member, which is connected to at least one pulley and configured to drive the pulley to rotate.

[0006] The trimming device in this application, after the shell body and top cover of a workpiece to be processed, such as a cylindrical battery casing, are welded and assembled, can fix one end of the casing through a fixing mechanism and drive the casing to rotate around an axis parallel to a first direction. Simultaneously, the trimming device also includes a grinding mechanism. The plane of the grinding section formed by the abrasive belt in this grinding mechanism intersects with the first direction, and the abrasive belt has corresponding tension. This allows the grinding section to adaptively bend and grind the weld seam near the edge between the end face and the side circumferential surface of the end of the casing away from the fixing mechanism, thus rounding the weld seam at the edge. Therefore, the structural design of the trimming device in this solution achieves rounded corner trimming of the weld seam at the edge of the workpiece to be processed, eliminating defects such as sharp points or protrusions in the weld seam area, so that UV coating can stably adhere to the weld seam, enabling uniform printing and reducing the risk of missed coating. Furthermore, setting the angle α between the plane containing the grinding section and the first direction to 40° to 50° facilitates the formation of the required rounded corners at the weld seams on the edges, while also improving the uniformity of the grinding effect at the rounded corners. In addition, the carrier component and the second driving component allow for adjustment of the angle α between the plane containing the grinding section and the first direction, thereby facilitating adaptive rounded corner grinding for different weld seam shapes at the edges and improving the rounded corner finishing effect.

[0007] In some embodiments, the number of pulleys is at least three, including two support pulleys and at least one adjusting pulley; the two support pulleys are rotatably disposed on the carrier, and the adjusting pulley is rotatably and radially slidably disposed on the carrier; the abrasive belt located between the two support pulleys is configured as a grinding section. Thus, the tension of the pulleys can be adjusted by sliding the position of the adjusting pulley to achieve the desired rounded corner finishing effect.

[0008] In some embodiments, the tension of the abrasive belt is defined as F1, satisfying the relationship: 0.5N ≤ F1 ≤ 1.5N. This allows for a better balance between abrasive force and the included angle α, thus achieving the desired rounded corner finishing effect.

[0009] In some embodiments, the mesh size of the abrasive belt is defined as P, satisfying the relationship: 240 ≤ P ≤ 400. This avoids both excessive and insufficient abrasive removal, thus achieving the desired rounded corner finishing effect.

[0010] In some embodiments, the grinding mechanism further includes a third driving member connected to at least one pulley and configured to drive the pulley to rotate; the rotational speed of the third driving member is defined as N1, satisfying the relationship: 2000r / min≤N1≤5000r / min. This allows for better adaptation to the hardness of the steel material of the cylindrical battery, thus achieving the desired rounded corner finishing effect.

[0011] In some embodiments, the abrasive belt is made of alumina, silicon nitride, or zirconium corundum. This allows for better adaptation to the hardness of the steel material used in cylindrical batteries, thus achieving the desired rounded corner finishing effect.

[0012] In some embodiments, the rotational speed of the first driving member is defined as N2, satisfying the relationship: 360 r / min ≤ N2 ≤ 720 r / min. This allows for a better balance between grinding effect and grinding efficiency.

[0013] In some embodiments, the dressing device further includes a first polishing mechanism and a second polishing mechanism. The first polishing mechanism includes a first polishing wheel, and the second polishing mechanism includes a second polishing wheel. The axes of both the first and second polishing wheels are parallel to a first direction. The first polishing wheel has a first polishing surface, which is arranged around the axis of the first polishing wheel and configured to polish the workpiece located on the fixed assembly. The second polishing wheel has a second polishing surface, which is arranged perpendicular to the axis of the second polishing wheel and configured to polish the workpiece located on the fixed assembly. The dressing device further includes a conveying mechanism, which is configured to convey the fixed assembly. The grinding mechanism, the first polishing mechanism, and the second polishing mechanism are all located on the conveying path of the conveying mechanism, and the first and second polishing mechanisms are located downstream of the grinding mechanism. Therefore, burrs present in the weld near the edges on the end face and side circumference of the workpiece that have not been ground by the grinding mechanism can be polished, improving the removal effect of sharp points or protrusions in the weld.

[0014] In some embodiments, the first polishing mechanism further includes a fourth driving member connected to the first polishing wheel and configured to drive the first polishing wheel to rotate; the rotational speed of the fourth driving member is defined as N3, satisfying the relationship: 1000r / min≤N3≤3000r / min; and / or, the second polishing mechanism further includes a fifth driving member connected to the second polishing wheel and configured to drive the second polishing wheel to rotate; the rotational speed of the fifth driving member is defined as N4, satisfying the relationship: 800r / min≤N4≤2000r / min; and / or, the first polishing wheel is made of polyurethane or nylon; and / or, the second polishing wheel is made of cloth or nylon. Thus, burrs present in the weld seams near the edges on the end face and side peripheral surface of the workpiece that have not been ground by the grinding mechanism can be polished, improving the removal effect of sharp points or protrusions in the weld seams. Using a high-rigidity polyurethane or nylon wheel for the first polishing wheel improves the removal of weld seams during polishing, thereby enhancing the microscopic shaping of the cylindrical battery's side circumference. Setting the rotational speed N4 of the second polishing wheel driven by the fourth drive component to 800 r / min to 2000 r / min allows for a relatively low speed, which helps improve the surface roughness of the cylindrical battery's end face, preventing scratches and wear during subsequent assembly and improving the stability of the cylindrical battery assembly. Using a cloth or nylon wheel for the second polishing wheel prevents scratches or wear on the cylindrical battery's end face, ensuring normal and stable assembly.

[0015] In some embodiments, the finishing device further includes a detection mechanism disposed on the transport path of the transport mechanism and downstream of the grinding mechanism, the first polishing mechanism, and the second polishing mechanism. The detection mechanism is configured to capture and detect the grinding and polishing quality of the workpiece located on the fixed assembly. The detection mechanism includes a first detection camera and a second detection camera. The optical axis of the first detection camera is parallel to a first direction, and the optical axis of the second detection camera intersects the first direction. Thus, the grinding and polishing effect of the weld at the edge of the workpiece can be captured and detected.

[0016] This application also proposes a control method for a finishing device, employing the finishing device as described in any of the above embodiments. The control method includes the following steps: controlling a fixing mechanism to clamp and fix the workpiece to be processed; controlling a conveying mechanism to convey the fixing mechanism to a grinding mechanism, and controlling the grinding mechanism to grind the workpiece to be processed; controlling the conveying mechanism to convey the fixing mechanism to a first polishing mechanism, and controlling the first polishing mechanism to polish the workpiece to be processed; controlling the conveying mechanism to convey the fixing mechanism to a second polishing mechanism, and controlling the second polishing mechanism to polish the workpiece to be processed. Thus, the grinding mechanism can round off the weld seams at the edges of the workpiece to be processed, removing sharp points or protrusions in the weld seam area, allowing for uniform printing of the UV coating and reducing the risk of missed coating. Furthermore, the first and second polishing mechanisms polish the burrs on the end face and side circumference of the workpiece to be processed, near the edges, that were not ground by the grinding mechanism, improving the removal effect of sharp points or protrusions in the weld seams.

[0017] In some embodiments, in the step of controlling the conveying mechanism to transport the fixing mechanism to the first polishing mechanism, and controlling the first polishing mechanism to polish the workpiece; the first polishing mechanism is controlled to polish the workpiece with a preset pressure F2, satisfying the relationship: 0.5N≤F2≤2N; and / or, the first polishing mechanism is controlled to reciprocate along the first direction with a preset stroke L1, satisfying the relationship: 1mm≤L1≤3mm; and / or, the first polishing mechanism is controlled to polish the workpiece for a preset time t2, satisfying the relationship: 1s≤t2≤2s. Thus, the first polishing wheel in the first polishing mechanism is controlled to abut against the side circumferential surface of the housing with a preset pressure F2 for polishing. Since the preset pressure F2 is relatively large, it facilitates improved polishing stability, thereby improving the effect of microscopic shaping of the side circumferential surface of the cylindrical battery. Controlling the first polishing wheel to reciprocate along the first direction with a preset stroke L1 during polishing facilitates the application of force to various protrusions or bumps on the side circumferential surface of the housing, improving the polishing effect. Simultaneously, it also allows for more uniform wear on the first polishing wheel, increasing its service life. Furthermore, since the preset stroke L1 is set to 1 mm to 3 mm, it can effectively balance the reciprocating motion effect in the first direction and the polishing effect on the side circumferential surface of the shell in the circumferential direction. Controlling the first polishing mechanism to polish the workpiece for 1 to 2 seconds can effectively balance the polishing effect and polishing efficiency.

[0018] In some embodiments, in the step of controlling the conveying mechanism to transport the fixing mechanism to the second polishing mechanism, and controlling the second polishing mechanism to polish the workpiece; the second polishing mechanism is controlled to polish the workpiece with a preset pressure F3, satisfying the relationship: 0.3N≤F3≤1.5N; and / or, the second polishing mechanism is controlled to reciprocate along the radial direction of the second polishing wheel with a preset stroke L2, satisfying the relationship: 1mm≤L2≤3mm; and / or, the second polishing mechanism is controlled to polish the workpiece for a preset time t3, satisfying the relationship: 1s≤t3≤2s. Thus, the second polishing wheel in the second polishing mechanism is controlled to abut against the end face of the housing with a preset pressure F3 for polishing. Since the preset pressure F3 is relatively small, the side circumferential surface of the housing can be finely polished, improving the surface finish. Controlling the second polishing wheel in the second polishing mechanism to reciprocate along the radial direction of the second polishing wheel with a preset stroke L2 during polishing facilitates the application of force to various protrusions or bumps on the end face of the housing, improving the polishing effect. Simultaneously, it also allows for more uniform wear on the second polishing wheel, increasing its service life. Controlling the second polishing mechanism to polish the workpiece for 1 to 2 seconds can effectively balance polishing effect and polishing efficiency.

[0019] In some embodiments, in the step of controlling the conveying mechanism to transport the fixing mechanism to the grinding mechanism, and controlling the grinding mechanism to grind the workpiece, the grinding mechanism is controlled to grind the workpiece for a preset time t1, satisfying the relationship: 1s≤t1≤2s. Therefore, controlling the grinding mechanism to grind the workpiece for 1s to 2s can better balance grinding effect and grinding efficiency.

[0020] In some embodiments, in the step of controlling the fixing mechanism to clamp and fix the workpiece, the fixing mechanism is controlled to clamp and fix the workpiece with a preset pressure F4, satisfying the relationship: 0.2N≤F4≤2N. Therefore, controlling the fixing mechanism to clamp and fix the workpiece with a clamping force of 0.2N to 2N can improve the stability of the workpiece clamping without causing pressure damage.

[0021] This application also proposes a cylindrical battery, formed by processing using the trimming device described in the above embodiment. The cylindrical battery includes a casing and a weld. The casing includes a casing body and a top cover. The casing body is cylindrical and has an opening at one end. The top cover closes to the opening of the casing body. The weld is configured to connect the casing body and the top cover and is located at the connection between the side circumferential surface and the end face of the casing. The weld includes a first surface, a second surface, and a third surface. The first surface is located on the side circumferential surface of the casing, the second surface is located on the end face of the casing, and the third surface connects the first surface and the second surface. The third surface is a convex arc surface. Thus, by trimming the outer surface of the weld with the above-described trimming device into a third surface with rounded corners, the weld at the edge of the workpiece is trimmed to rounded corners. This removes defects such as sharp points or protrusions in the weld area at the edge, allowing for uniform printing of the UV coating and reducing the risk of missed coating.

[0022] In some embodiments, the radius of the third surface is defined as R1, satisfying the relationship: 0.34 mm ≤ R1 ≤ 0.48 mm; and / or, the span angle from the end of the third surface connected to the first surface to the end connected to the second surface is defined as α, satisfying the relationship: 85° ≤ β ≤ 95°; and / or, the roughness of the first surface is greater than the roughness of the second surface; and / or, the axial dimension of the first surface in the housing is defined as L3, and the axial dimension of the top cover in the housing is defined as L4, satisfying the relationship: 0.5 ≤ L3 / L4 ≤ 0.7; and / or, the dimension from the end of the second surface connected to the third surface to the end away from the third surface is defined as L5, and the radius of the housing is R2, satisfying the relationship: 0.03 ≤ L5 / R2 ≤ 0.05. Therefore, setting the radius R of the third surface to 0.34 mm to 0.48 mm allows for a more suitable fillet size, facilitating uniform printing on the first, second, and third surfaces of the entire weld. Setting the span angle β to 85° to 95° facilitates a smoother connection between the two ends of the third surface and the first and second surfaces, enabling smooth printing on the first, second, and third surfaces of the weld and improving printing uniformity. Setting the roughness of the first surface to be greater than that of the second surface helps avoid scratches and wear during subsequent assembly and improves the stability of the cylindrical battery assembly. Setting the ratio of L3 to L4 to 0.5 to 0.7 ensures that the first surface has a suitable height in the axial direction of the housing, balancing the welding connection between the housing body and the top cover, as well as the overall strength and manufacturing cost of the housing. Setting the ratio of L5 to R2 to 0.03 to 0.05 ensures that the second surface has a suitable width in the radial direction of the housing, balancing the welding connection between the housing body and the top cover, as well as the overall strength and manufacturing cost of the housing. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the trimming device of this application;

[0025] Figure 2 This is a partial structural schematic diagram of an embodiment of the trimming device of this application;

[0026] Figure 3 This is a schematic diagram of the grinding mechanism of an embodiment of the dressing device of this application;

[0027] Figure 4 This is a schematic diagram of the grinding mechanism of an embodiment of the dressing device of this application from another perspective.

[0028] Figure 5 This is a partial structural schematic diagram of an embodiment of the trimming device of this application;

[0029] Figure 6 This is another partial structural schematic diagram of an embodiment of the trimming device of this application;

[0030] Figure 7 This is a partial structural schematic diagram of an embodiment of the cylindrical battery of this application;

[0031] Figure 8 This is a schematic flowchart of an embodiment of the control method for the trimming device of this application.

[0032] Explanation of icon numbers:

[0033] 100. Dressing device; 10. Fixing mechanism; 11. First driving component; 13. Fixing assembly; 20. Grinding mechanism; 21. Pulley; 211. Support wheel; 213. Adjusting wheel; 23. Sanding belt; 231. Grinding section; 25. Carrier component; 27. Second driving component; 29. ​​Third driving component; 30. First polishing mechanism; 31. First polishing wheel; 311. First polishing surface; 33. Fourth driving component; 40. Second polishing mechanism; 41. Second polishing wheel; 411. Second polishing surface; 43. 50. Fifth driving component; 51. Conveying mechanism; 52. Grinding station; 53. First polishing station; 54. Second polishing station; 55. Inspection station; 56. Loading station; 67. Unloading station; 60. Inspection mechanism; 61. First inspection camera; 63. Second inspection camera; 70. Dust collection mechanism; 200. Cylindrical battery; 201. Housing; 2011. Housing body; 2013. Top cover; 203. Weld; 2031. First surface; 2033. Second surface; 2035. Third surface.

[0034] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0036] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0037] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0039] In related technologies, the casing of cylindrical batteries typically includes a casing body and a top cover, with the top cover fitting onto one end of the casing body and being welded together. Furthermore, to prevent rusting at the weld seams between the end faces and side circumferential faces of the casing, UV printing is usually performed on the weld seams.

[0040] However, because weld morphology is often difficult to control, defects such as sharp points or protrusions can easily form in the weld area. In such cases, the sharp points or protrusions formed by the UV coating in the weld area will not be able to form the required UV coating film due to insufficient surface tension and limited contact area. This results in uneven printing of the UV coating and a risk of missed coating.

[0041] Therefore, based on the above considerations, in order to solve the problem in related technologies where the weld seam area at the edge of the cylindrical battery casing cannot be printed evenly, easily leading to the risk of missing coating, this application proposes a trimming device. This trimming device includes a fixing mechanism and a grinding mechanism. The fixing mechanism can fix one end of the casing and drive it to rotate; while the grinding section formed by the abrasive belt in the grinding mechanism can round off the weld seam area at the other end of the casing, removing sharp points or protrusions and other defects, so that the UV coating can be stably applied to the weld seam, enabling even printing and reducing the risk of missing coating.

[0042] In addition, it should be noted that the trimming device proposed in this application can be used not only for the casing of cylindrical batteries as described above, but also for other products. The type of workpiece to be processed by the trimming device in this application is not limited.

[0043] The structure of the trimming device proposed in this application will be described below with reference to an embodiment:

[0044] Please refer to the reference. Figures 1 to 3In one embodiment of this application, the finishing device 100 includes a fixing mechanism 10 and a grinding mechanism 20; the fixing mechanism 10 includes a first driving member 11 and a fixing component 13, the fixing component 13 is connected to the first driving member 11 and configured to fix the workpiece to be processed, the first driving member 11 is configured to drive the fixing component 13 to rotate about an axis parallel to a first direction; the grinding mechanism 20 includes at least two pulleys 21 and a sanding belt 23, the sanding belt 23 is wound around the at least two pulleys 21; the sanding belt 23 has a grinding section 231, the grinding section 231 is configured to grind the workpiece to be processed located on the fixing component 13, and the plane where the grinding section 231 is located intersects with the first direction.

[0045] The first driving component 11 can provide power to drive the fixed assembly 13 to rotate around an axis parallel to the first direction, thereby causing the workpiece fixed on the fixed assembly 13 to rotate accordingly, so that the grinding mechanism 20 can perform a complete circumferential grinding of the workpiece. For example, please refer to... Figure 7 The weld 203 on the edge formed by the end face and side peripheral face of the cylindrical battery 200 casing 201 is ground completely. When the dressing device 100 is in normal installation and use, with the ground as a reference, the first direction can be vertical, and the casing 201 of the cylindrical battery 200 can be vertically fixed to the fixing assembly 13. Of course, in other embodiments, this first direction can also be horizontal or other methods; this application does not limit the specific orientation of the first direction. Furthermore, the first driving component 11 can be a motor, and its specific type is not limited.

[0046] The fixing component 13 can be used to fix the workpiece to be processed so that it can be rotated during processing. The fixing component 13 can clamp and fix the workpiece. For example, the fixing component 13 can be a three-jaw chuck, which clamps and fixes the workpiece by driving the jaws on the chuck closer together. Of course, in other embodiments, the fixing component 13 can also magnetically fix the workpiece. For example, the fixing component 13 can be an electromagnet, which attracts the workpiece by electromagnetic induction.

[0047] The pulley 21 can be used to spread and drive the sanding belt 23 to rotate. There can be two pulleys 21, or three or more. This application does not limit the number of pulleys 21.

[0048] The abrasive belt 23, when rotating between the two pulleys 21, can contact the workpiece to achieve rounding of the weld seam 203 at the edge of the workpiece. At this time, the portion of the abrasive belt 23 located between the two pulleys 21 forms the grinding section 231. Of course, when the first direction is vertical as described above, in some embodiments, the plane of the grinding section 231 can intersect the first direction but not be perpendicular to it, allowing the grinding section 231 to be inclined to facilitate grinding the edge of the workpiece. Of course, in other embodiments, the plane of the grinding section 231 can also be perpendicular to the first direction.

[0049] The finishing device 100 in this application, after the shell body 2011 and top cover 2013 of the shell 201 of the workpiece to be processed, such as the cylindrical battery 200, are welded and assembled, can fix one end of the shell 201 by the fixing mechanism 10 and drive the shell 201 to rotate around an axis parallel to the first direction. At the same time, since the finishing device 100 also includes a grinding mechanism 20, the plane of the grinding section 231 formed by the abrasive belt 23 in the grinding mechanism 20 intersects the first direction, and the abrasive belt 23 has a corresponding tension, so that when the grinding section 231 approaches the weld 203 at the edge between the end face and the side peripheral face of the end of the shell 201 away from the fixing mechanism 10, it can be adaptively bent and ground to grind the weld 203 at the edge into a rounded corner. Therefore, the structure of the trimming device 100 in this solution enables the rounding of the weld seam 203 at the edge of the workpiece, which can remove defects such as sharp points or protrusions in the weld seam 203 area at the edge, so that the UV coating can be stably applied to the weld seam 203, and uniform printing can be performed to reduce the risk of missed coating.

[0050] Please refer to the reference. Figure 2 and Figure 3 In one embodiment of this application, the angle between the plane where the grinding section 231 is located and the first direction forming the direction toward the fixing mechanism 10 is defined as α, satisfying the relationship: 40°≤α≤50°.

[0051] In this embodiment, setting the included angle α to 40° to 50° makes the force applied by the grinding segment 231 on the end face and side circumference of the housing 201 more uniform, thereby facilitating the formation of the required rounded corner at the weld 203 on the edge, and improving the uniformity of the grinding effect at all points of the rounded corner. The included angle α can be 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, or 50°, or any value within the above range.

[0052] Please refer to the reference. Figure 3 and Figure 4In one embodiment of this application, the grinding mechanism 20 further includes a carrier member 25, on which at least two pulleys 21 are rotatably disposed; the grinding mechanism 20 further includes a second driving member 27, which is connected to the carrier member 25 and configured to drive the carrier member 25 to rotate about an axis parallel to the pulleys 21.

[0053] The carrier component 25 can be used to provide a mounting position for mounting the pulley 21. The carrier component 25 can be a plate structure, or a solid structure or a housing 201 structure; this application does not limit the structural type and shape of the carrier structure. The second driving component 27 can be used to provide driving force to drive the pulley 21 to rotate. The second driving component 27 can be a motor, and its specific type is not limited.

[0054] In this embodiment, the pulley 21 is mounted on the carrier 25, and a second driving member 27 is further provided to drive the carrier 25. The carrier 25 can be driven to rotate around an axis parallel to the pulley 21 by the second driving member 27, so as to adjust the angle α formed by the plane where the grinding section 231 is located and the first direction. This facilitates the adaptive rounding grinding for different weld seam 203 shapes at the edge, and improves the rounding effect.

[0055] Please refer to Figure 3 In one embodiment of this application, the number of pulleys 21 is at least three, including two support pulleys 211 and at least one adjusting pulley 213; the two support pulleys 211 are rotatably disposed on the carrier member 25, the adjusting pulley 213 is rotatably and slidably disposed on the carrier member 25 along its radial direction, and the abrasive belt 23 located between the two support pulleys 211 is configured as a grinding section 231.

[0056] Two support wheels 211 can be used to spread out a portion of the pulley 21 to form a grinding section 231 of a fixed length. Any portion of the abrasive belt 23 can form a grinding section 231 when rotating between the two support wheels 211. An adjusting wheel 213 can slide radially to adjust its position and can be fixed in place after adjustment. The adjusting wheel 213 can be rotatably mounted on an adjusting block, which can be slidably mounted in a groove on the carrier member 25. After adjustment, bolts and nuts are used to lock the adjusting block to the carrier member 25. Of course, in other embodiments, it is also possible to use all pulleys 21 as support wheels 211.

[0057] In this embodiment, the pulley 21 is configured to include a support wheel 211 and an adjusting wheel 213, so that the tension of the pulley 21 can be adjusted by sliding the position of the adjusting wheel 213 to achieve the desired rounded corner trimming effect.

[0058] In one embodiment of this application, the tension of the abrasive belt 23 is defined as F1, satisfying the relationship: 0.5N≤F1≤1.5N.

[0059] In this embodiment, setting the tension F1 of the abrasive belt 23 to 0.5N to 1.5N can better balance the control of grinding force and the included angle α, so as to achieve the desired rounded corner finishing effect. The tension F1 can be 0.5N, 0.6N, 0.7N, 0.8N, 0.9N, 1N, 1.1N, 1.2N, 1.3N, 1.4N, or 1.5N, or any value within the above range.

[0060] In one embodiment of this application, the mesh number of the abrasive belt 23 is defined as P, satisfying the relationship: 240≤P≤400.

[0061] In this embodiment, the mesh number P of the abrasive belt 23 is set to between 240 and 400 mesh to avoid excessive or insufficient grinding and removal effects, thus achieving the desired rounded corner finishing effect. The mesh number P can be 240, 250, 260, 270, 280, 290, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, or 400, or any value within the above range.

[0062] Please refer to the reference. Figure 3 and Figure 4 In one embodiment of this application, the grinding mechanism 20 further includes a third driving member 29, which is connected to at least one pulley 21 and configured to drive the pulley 21 to rotate; the rotational speed of the third driving member 29 is defined as N1, which satisfies the relationship: 2000r / min≤N1≤5000r / min.

[0063] The third driving component 29 can be used to provide driving force to drive the pulley 21 to rotate. The third driving component 29 can be a motor, and the specific type is not limited.

[0064] In this embodiment, the driving speed N1 of the third driving member 29 and the pulley 21 is set to 2000 r / min to 5000 r / min, so that it can better adapt to the hardness of the steel material of the cylindrical battery 200, so as to form the required rounded corner trimming effect. The speed N1 can be 2000 r / min, 2500 r / min, 3000 r / min, 3500 r / min, 4000 r / min, 4500 r / min or 5000 r / min, or any value in the above range.

[0065] In one embodiment of this application, the abrasive belt 23 is made of alumina, silicon nitride, or zirconium corundum.

[0066] In this embodiment, the material of the abrasive belt 23 is set to alumina, silicon nitride, or zirconium corundum, which can also be well adapted to the hardness of the steel material of the cylindrical battery 200 in order to form the required rounded corner trimming effect.

[0067] In one embodiment of this application, the rotational speed of the first driving member 11 is defined as N2, satisfying the relationship: 360r / min≤N2≤720r / min.

[0068] In this embodiment, the rotational speed N2 of the first driving member 11 driving the fixed assembly 13 is set to 360 r / min to 720 r / min, which can better balance the grinding effect and grinding efficiency. The rotational speed N2 can be 360 ​​r / min, 400 r / min, 450 r / min, 500 r / min, 550 r / min, 600 r / min, 650 r / min, 700 r / min, or 720 r / min, or any value within the above range.

[0069] Please refer to the reference. Figure 1 , Figure 5 as well as Figure 6 In one embodiment of this application, the trimming device 100 further includes a first polishing mechanism 30 and a second polishing mechanism 40. The first polishing mechanism 30 includes a first polishing wheel 31, and the second polishing mechanism 40 includes a second polishing wheel 41. The axes of the first polishing wheel 31 and the second polishing wheel 41 are both parallel to a first direction. The first polishing wheel 31 has a first polishing surface 311, which is arranged around the axis of the first polishing wheel 31 and configured to polish the workpiece to be processed located on the fixing component 13. The second polishing wheel 41 has a second polishing surface 411, which is arranged perpendicular to the axis of the second polishing wheel 41 and configured to polish the workpiece to be processed located on the fixing component 13.

[0070] The first polishing mechanism 30 can form a first polishing surface 311 by the side peripheral surface of the first polishing wheel 31 to polish the weld seam 203 near the edge in the side peripheral surface of the cylindrical battery 200. The second polishing mechanism 40 can form a second polishing surface 411 by the bottom surface of the second polishing wheel 41 to polish the weld seam 203 near the edge in the end face of the cylindrical battery 200. After the workpiece is ground by the grinding mechanism 20, it can be polished first by the first polishing mechanism 30 or first by the second polishing mechanism 40. This application does not limit the working order of the first polishing mechanism 30 and the second polishing mechanism 40.

[0071] In this embodiment, by further providing the first polishing mechanism 30 and the second polishing mechanism 40, the burrs present in the weld 203 near the edge on the end face and side peripheral surface of the workpiece that have not been ground by the grinding mechanism 20 can be polished, thereby improving the removal effect of sharp points or protrusions in the weld 203.

[0072] Please refer to Figure 1 In one embodiment of this application, the trimming device 100 further includes a conveying mechanism 50, which is configured with a conveying fixing mechanism 10. The grinding mechanism 20, the first polishing mechanism 30 and the second polishing mechanism 40 are all located on the conveying path of the conveying mechanism 50, and the first polishing mechanism 30 and the second polishing mechanism 40 are located downstream of the grinding mechanism 20.

[0073] The conveying mechanism 50 can be used to convey the fixed mechanism 10. The conveying path of the conveying mechanism 50 can have a grinding station 51, a first polishing station 52, and a second polishing station 53. The grinding mechanism 20, the first polishing mechanism 30, and the second polishing mechanism 40 can be respectively located at the grinding station 51, the first polishing station 52, and the second polishing station 53. Alternatively, the conveying mechanism 50 can include a turntable structure to convey the fixed mechanism 10 along the circumferential path of the turntable, improving the compactness of the distribution among the various mechanisms of the dressing device 100 and reducing space occupation. Of course, the conveying mechanism 50 can also include a conveyor belt structure to convey the fixed mechanism 10 along a linear path; this application does not limit the structural type of the conveying mechanism 50. The first polishing mechanism 30 and the second polishing mechanism 40 are located downstream of the grinding mechanism 20. The first polishing mechanism 30 can be located upstream of the second polishing mechanism 40, or it can be located downstream of the second polishing mechanism 40, as long as they are both downstream of the grinding mechanism 20.

[0074] In this embodiment, the fixed mechanism 10 is conveyed by the conveying mechanism 50 to transport the workpiece to be processed fixed on the fixed mechanism 10 to the grinding mechanism 20, the first polishing mechanism 30 and the second polishing mechanism 40 for corresponding processing, thereby improving the automation level of the dressing device 100 and increasing work efficiency.

[0075] Please refer to reference 1 and... Figure 5 In one embodiment of this application, the first polishing mechanism 30 further includes a fourth driving member 33, which is connected to the first polishing wheel 31 and configured to drive the first polishing wheel 31 to rotate; the rotational speed of the fourth driving member 33 is defined as N3, which satisfies the relationship: 1000r / min≤N3≤3000r / min.

[0076] The fourth driving component 33 can be used to provide driving force to drive the first polishing wheel 31 to rotate. The fourth driving component 33 can be a motor, and the specific type is not limited.

[0077] In this embodiment, the rotational speed N3 of the first polishing wheel 31 driven by the fourth driving member 33 is set to between 1000 r / min and 3000 r / min. This relatively high rotational speed N3 is beneficial for improving polishing efficiency. Simultaneously, during polishing, the weld seam 203 can be effectively removed, achieving a microscopic shape trimming effect on the side circumferential surface of the cylindrical battery 200, thus meeting the requirements for controlling the diameter of the cylindrical battery 200. The rotational speed N3 can be 1000 r / min, 1500 r / min, 2000 r / min, 2500 r / min, or 3000 r / min, or any value within this range.

[0078] In one embodiment of this application, the first polishing wheel 31 is made of polyurethane or nylon.

[0079] In this embodiment, the first polishing wheel 31 is made of high-rigidity polyurethane or nylon, which helps to improve the removal effect of weld 203 while polishing, thereby improving the effect of micro-trimming of the side circumferential surface of cylindrical battery 200.

[0080] Please refer to reference 1 and... Figure 6 In one embodiment of this application, the second polishing mechanism 40 further includes a fifth driving member 43, which is connected to the second polishing wheel 41. The fifth driving member 43 is configured to drive the second polishing wheel 41 to rotate. The rotational speed of the fifth driving member 43 is defined as N4, which satisfies the relationship: 800r / min≤N4≤2000r / min.

[0081] The fifth driving component 43 can be used to provide driving force to drive the second polishing wheel 41 to rotate. The fifth driving component 43 can be a motor, and the specific type is not limited.

[0082] In this embodiment, the rotational speed N4 of the second polishing wheel 41 driven by the fourth driving member 33 is set to between 800 r / min and 2000 r / min. This relatively low rotational speed N4 is beneficial for improving the surface roughness of the cylindrical battery 200, thereby avoiding scratches and wear during subsequent assembly and improving the stability of the cylindrical battery 200 assembly. The rotational speed N4 can be 800 r / min, 1000 r / min, 1500 r / min, or 2000 r / min, or any value within this range.

[0083] In one embodiment of this application, the second polishing wheel 41 is made of cloth or nylon.

[0084] In this embodiment, the material of the second polishing wheel 41 is set to a cloth wheel or a nylon wheel, which can avoid scratches or wear on the end face of the cylindrical battery 200, so that subsequent normal and stable assembly can be carried out.

[0085] In one embodiment of this application, the first polishing mechanism 30 may further include a sixth driving member to drive the fourth driving member 33 and the first polishing wheel 31 to slide together along a first direction.

[0086] The sixth driving component can be a cylinder, or a combination of a motor and a lead screw, which can be used to drive the fourth driving component 33 and the first polishing wheel 31 to slide in the first direction.

[0087] In this embodiment, during the polishing process, the fourth driving member 33 and the first polishing wheel 31 can be driven by the sixth driving member to reciprocate in the first direction, so as to facilitate the application of force to various protrusions or bumps on the side circumferential surface of the housing 201 and improve the polishing effect. At the same time, it can also make the wear of the first polishing wheel 31 more uniform and improve its service life.

[0088] In one embodiment of this application, the first polishing mechanism 30 may further include a seventh driving member, which drives the fourth driving member 33, the first polishing wheel 31, and the sixth driving member to move radially along the first polishing wheel 31, so that the first polishing wheel 31 can move closer to abut against the side circumferential surface of the housing 201. The seventh driving member may be a cylinder, or a combination of a motor and a lead screw; this application does not limit this to any particular type.

[0089] In one embodiment of this application, the second polishing mechanism 40 may further include an eighth driving member to drive the fifth driving member 43 and the second polishing wheel 41 to slide radially along the second polishing wheel 41.

[0090] The eighth driving component can be a cylinder, or a combination of a motor and a lead screw, which can be used to drive the fifth driving component 43 and the second polishing wheel 41 to slide radially along the second polishing wheel 41.

[0091] In this embodiment, during the polishing process, the fifth driving member 43 and the second polishing wheel 41 can be driven by the eighth driving member to reciprocate in the radial direction of the second polishing wheel 41, so as to facilitate the application of force to various protrusions or bumps on the end face of the housing 201 and improve the polishing effect. At the same time, it can also make the wear of the second polishing wheel 41 more uniform and improve its service life.

[0092] In one embodiment of this application, the second polishing mechanism 40 may further include a ninth driving member, which drives the fifth driving member 43, the second polishing wheel 41, and the eighth driving member to move together along a first direction, so that the second polishing wheel 41 can move closer to abut against the end face of the housing 201. The ninth driving member may be a cylinder, or it may be a combination of a motor and a lead screw; this application does not limit this.

[0093] Please refer to Figure 1 In one embodiment of this application, the finishing device 100 further includes a detection mechanism 60, which is located on the conveying path of the conveying mechanism 50 and downstream of the grinding mechanism 20, the first polishing mechanism 30 and the second polishing mechanism 40. The detection mechanism 60 is configured to capture and detect the grinding and polishing quality of the workpiece to be processed located on the fixed component 13. The detection mechanism 60 includes a first detection camera 61 and a second detection camera 63. The optical axis of the first detection camera 61 is parallel to the first direction, and the optical axis of the second detection camera 63 intersects the first direction.

[0094] The conveying mechanism 50 may also have a detection station 54 on the conveying path, and the detection mechanism 60 may be set at the detection station 54.

[0095] In this embodiment, a detection mechanism 60, including a first detection camera 61 and a second detection camera 63, is provided at the detection station 54 to capture and inspect the grinding and polishing effect of the weld 203 at the edge of the workpiece. The finishing device 100 can pre-store a standard image template, which is an image of the cylindrical battery 200 after grinding and polishing meeting the requirements. After the cylindrical battery 200 has undergone grinding and polishing, the detection mechanism 60 can capture an image of the cylindrical battery 200 and compare it with the pre-stored standard image template to detect the grinding and polishing quality of the cylindrical battery 200.

[0096] Please refer to Figure 1 In one embodiment of this application, the finishing device 100 may further include a dust collection mechanism 70 to collect the dust generated during grinding and polishing. The dust collection mechanism 70 may include a dust collection hood, which may be connected to a fan to create negative pressure at the opening of the dust collection hood. To improve the dust collection effect, the number of dust collection mechanisms 70 may be set to three, with each dust collection mechanism 70 located at the grinding station 51, the first polishing station 52, and the second polishing station 53, respectively. The dust collection hood may be located on the workpiece to be processed on the fixing mechanism 10 of the grinding station 51, the first polishing station 52, and the second polishing station 53.

[0097] In one embodiment of this application, to improve the working efficiency of the trimming device 100, please refer to... Figure 1 The conveying mechanism 50 may also have a loading station 55 and a unloading station 56 on the conveying path; at the same time, the trimming device 100 may also include a robot arm to load the workpiece to be processed onto the fixed component 13 located at the loading station 55, or to remove the workpiece to be processed after grinding and polishing from the fixed component 13 located at the unloading station 56.

[0098] In one embodiment of this application, the number of fixing components 13 can be one, passing through a loading station 55, a grinding station 51, a first polishing station 52, a second polishing station 53, an inspection station 54, and a unloading station 56. Of course, please refer to... Figure 1 The number of fixed components 13 can also be set to correspond to the number of workstations, for example, six, so that each workstation can work at the same time, further improving the working efficiency of the trimming device 100.

[0099] Please refer to the reference. Figures 1 to 6In one embodiment of this application, the finishing device 100 includes a fixing mechanism 10 and a grinding mechanism 20. The fixing mechanism 10 includes a first driving member 11 and a fixing component 13. The fixing component 13 is connected to the first driving member 11 and configured to fix the workpiece to be processed. The first driving member 11 is configured to drive the fixing component 13 to rotate about an axis parallel to a first direction. The grinding mechanism 20 includes at least two pulleys 21 and an abrasive belt 23. The abrasive belt 23 is wound around the at least two pulleys 21. The abrasive belt 23 has a grinding section 231, which is configured to grind the workpiece to be processed located on the fixing component 13. The plane containing the grinding section 231 intersects the first direction. The angle α formed by the plane containing the grinding section 231 and the first direction toward the fixing mechanism 10 is defined as α, satisfying the relationship: 40°≤α≤50°. The grinding mechanism 20 also includes a carrier member 25, on which at least two pulleys 21 are rotatably mounted; the grinding mechanism 20 also includes a second drive member 27, which is connected to the carrier member 25 and configured to drive the carrier member 25 to rotate about an axis parallel to the pulleys 21. The number of pulleys 21 is at least three, including two support pulleys 211 and at least one adjusting pulley 213; the two support pulleys 211 are rotatably mounted on the carrier member 25, and the adjusting pulley 213 is rotatably and radially slidably mounted on the carrier member 25. The abrasive belt 23 located between the two support pulleys 211 is configured as a grinding section 231. The tension of the abrasive belt 23 is defined as F1, satisfying the relationship: 0.5N ≤ F1 ≤ 1.5N. The mesh size of the abrasive belt 23 is defined as P, satisfying the relationship: 240 ≤ P ≤ 400. The grinding mechanism 20 also includes a third driving member 29, which is connected to at least one pulley 21 and configured to drive the pulley 21 to rotate. The rotational speed of the third driving member 29 is defined as N1, satisfying the relationship: 2000 r / min ≤ N1 ≤ 5000 r / min. The abrasive belt 23 is made of alumina, silicon nitride, or zirconium corundum. The rotational speed of the first driving member 11 is defined as N2, satisfying the relationship: 360 r / min ≤ N2 ≤ 720 r / min.The dressing device 100 further includes a first polishing mechanism 30 and a second polishing mechanism 40. The first polishing mechanism 30 includes a first polishing wheel 31, and the second polishing mechanism 40 includes a second polishing wheel 41. The axes of the first polishing wheel 31 and the second polishing wheel 41 are both parallel to a first direction. The first polishing wheel 31 has a first polishing surface 311, which is arranged around the axis of the first polishing wheel 31 and configured to polish the workpiece to be processed located on the fixing component 13. The second polishing wheel 41 has a second polishing surface 411, which is arranged perpendicular to the axis of the second polishing wheel 41 and configured to polish the workpiece to be processed located on the fixing component 13. The dressing device 100 also includes a conveying mechanism 50, which is configured to convey the fixing mechanism 10. The grinding mechanism 20, the first polishing mechanism 30, and the second polishing mechanism 40 are all located on the conveying path of the conveying mechanism 50, and the first polishing mechanism 30 and the second polishing mechanism 40 are located downstream of the grinding mechanism 20. The first polishing mechanism 30 further includes a fourth driving member 33, which is connected to the first polishing wheel 31 and configured to drive the first polishing wheel 31 to rotate. The rotational speed of the fourth driving member 33 is defined as N3, satisfying the relationship: 1000r / min≤N3≤3000r / min. The second polishing mechanism 40 further includes a fifth driving member 43, which is connected to the second polishing wheel 41 and configured to drive the second polishing wheel 41 to rotate. The rotational speed of the fifth driving member 43 is defined as N4, satisfying the relationship: 800r / min≤N4≤2000r / min. The first polishing wheel 31 is made of polyurethane or nylon. The second polishing wheel 41 is made of cloth or nylon. The finishing device 100 also includes a detection mechanism 60, which is located on the conveying path of the conveying mechanism 50 and downstream of the grinding mechanism 20, the first polishing mechanism 30 and the second polishing mechanism 40. The detection mechanism 60 is configured to capture and detect the grinding and polishing quality of the workpiece to be processed located on the fixed component 13. The detection mechanism 60 includes a first detection camera 61 and a second detection camera 63. The optical axis of the first detection camera 61 is parallel to the first direction, and the optical axis of the second detection camera 63 intersects the first direction.

[0100] Please refer to Figure 8 This application also proposes a control method for a trimming device. The specific structure of the trimming device 100 can be referred to the above embodiments. In one embodiment of this application, the control method for the trimming device includes the following steps:

[0101] Step S10: Control the fixing mechanism 10 to clamp and fix the workpiece to be processed;

[0102] In step S20, the control conveying mechanism 50 conveys the fixing mechanism 10 to the grinding mechanism 20, and controls the grinding mechanism 20 to grind the workpiece to be processed;

[0103] Step S30: Control the conveying mechanism 50 to convey the fixing mechanism 10 to the first polishing mechanism 30, and control the first polishing mechanism 30 to polish the workpiece to be processed;

[0104] In step S40, the control conveying mechanism 50 conveys the fixing mechanism 10 to the second polishing mechanism 40, and controls the second polishing mechanism 40 to polish the workpiece to be processed.

[0105] In this embodiment, the fixing mechanism 10 is conveyed to the grinding mechanism 20 via the conveying mechanism 50. The grinding mechanism 20 can round the weld seam 203 at the edge of the workpiece fixed in the fixing mechanism 10, removing defects such as sharp points or protrusions in the weld seam 203 area at the edge, so that the UV coating can be printed evenly and the risk of missed coating can be reduced. Furthermore, the fixing mechanism 10 is conveyed to the first polishing mechanism 30 and the second polishing mechanism 40 via the conveying mechanism 50. The first polishing mechanism 30 and the second polishing mechanism 40 can polish the burrs in the weld seam 203 near the edge on the end face and side peripheral surface of the workpiece that have not been ground by the grinding mechanism 20, respectively, improving the removal effect of sharp points or protrusions in the weld seam 203. In addition, it should be noted that the sequence numbers of the steps described in this application (such as S10, S20, etc. shown above) are only used for identification in the drawings and are not a limitation on the order of the steps. The order of some steps can be adapted. For example, step S30 can be performed first, or step S40 can be performed first.

[0106] In one embodiment of this application, in step S30, the control conveying mechanism 50 conveys the fixing mechanism 10 to the first polishing mechanism 30, and controls the first polishing mechanism 30 to polish the workpiece; the control of the first polishing mechanism 30 to polish the workpiece with a preset pressure F2 satisfies the relationship: 0.5N≤F2≤2N.

[0107] In this embodiment, the seventh driving member in the first polishing mechanism 30 drives the first polishing wheel 31 to abut against the side circumferential surface of the housing 201 with a preset pressure F2 for polishing. Since the preset pressure F2 is relatively large, it facilitates improved polishing stability, thereby enhancing the microscopic shaping effect on the side circumferential surface of the cylindrical battery 200. The preset pressure F2 can be 0.5N, 0.6N, 0.7N, 0.8N, 0.9N, 1N, 1.1N, 1.2N, 1.3N, 1.4N, 1.5N, 1.6N, 1.7N, 1.8N, 1.9N, or 2N, or any value within the above range.

[0108] Please refer to Figure 5In one embodiment of this application, in step S30, the control conveying mechanism 50 conveys the fixing mechanism 10 to the first polishing mechanism 30, and controls the first polishing mechanism 30 to polish the workpiece; the first polishing wheel 31 of the first polishing mechanism 30 is controlled to reciprocate along the first direction with a preset stroke L1, satisfying the relationship: 1 mm ≤ L1 ≤ 3 mm.

[0109] In this embodiment, the sixth driving member in the first polishing mechanism 30 drives the first polishing wheel 31 to reciprocate along the first direction with a preset stroke L1 during the polishing process. This facilitates the application of force to various protrusions or bumps on the side circumferential surface of the housing 201, improving the polishing effect. Simultaneously, it allows for more uniform wear on the first polishing wheel 31, extending its service life. Furthermore, since the preset stroke L1 is set to 1 mm to 3 mm, it effectively balances the reciprocating motion effect in the first direction with the polishing effect on the side circumferential surface of the housing 201 in the circumferential direction. The preset stroke L1 can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm, or any value within this range.

[0110] In one embodiment of this application, in step S30, the control conveying mechanism 50 conveys the fixing mechanism 10 to the first polishing mechanism 30, and the control of the first polishing mechanism 30 to polish the workpiece is in the step of polishing the workpiece by the first polishing mechanism 30 for a preset time t2, which satisfies the relationship: 1s≤t2≤2s.

[0111] In this embodiment, controlling the first polishing mechanism 30 to polish the workpiece for 1 to 2 seconds can effectively balance polishing effect and polishing efficiency. The preset time t2 can be 1 second, 1.5 seconds, 2 seconds, 2.5 seconds, or 3 seconds, or any value within the above range.

[0112] In one embodiment of this application, in step S40, the control conveying mechanism 50 conveys the fixing mechanism 10 to the second polishing mechanism 40, and controls the second polishing mechanism 40 to polish the workpiece; the control of the second polishing mechanism 40 to polish the workpiece with a preset pressure F3 satisfies the relationship: 0.3N≤F3≤1.5N.

[0113] In this embodiment, the ninth driving member in the second polishing mechanism 40 drives the second polishing wheel 41 to abut against the end face of the housing 201 with a preset pressure F3 to perform polishing work. At this time, since the preset pressure F3 is relatively small, the side peripheral surface of the housing 201 can be finely polished to improve the surface smoothness. The preset pressure F3 can be 0.3N, 0.4N, 0.5N, 0.6N, 0.7N, 0.8N, 0.9N, 1N, 1.1N, 1.2N, 1.3N, 1.4N, or 1.5N, or any value within the above range.

[0114] Please refer to Figure 6 In one embodiment of this application, in step S40, the control conveying mechanism 50 conveys the fixing mechanism 10 to the second polishing mechanism 40, and controls the second polishing mechanism 40 to polish the workpiece; the control of the second polishing wheel 41 of the second polishing mechanism 40 to reciprocate along the radial direction of the second polishing wheel 41 with a preset stroke L2, satisfying the relationship: 1 mm ≤ L2 ≤ 3 mm.

[0115] In this embodiment, the eighth driving member in the second polishing mechanism 40 drives the second polishing wheel 41 to reciprocate along the radial direction of the second polishing wheel 41 with a preset stroke L2 during the polishing process. This facilitates the application of force to various protrusions or bumps on the end face of the housing 201, improving the polishing effect. Simultaneously, it allows for more uniform wear on the second polishing wheel 41, extending its service life. Furthermore, since the preset stroke L2 is set to 1 mm to 3 mm, it effectively balances the radial reciprocating motion effect with the circumferential polishing effect on the end face of the housing 201. The preset stroke L2 can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm, or any value within this range.

[0116] In one embodiment of this application, in step S40, the control conveying mechanism 50 conveys the fixing mechanism 10 to the second polishing mechanism 40, and the control of the second polishing mechanism 40 to polish the workpiece is in the step of polishing the workpiece by the second polishing mechanism 40 for a preset time t3, satisfying the relationship: 1s≤t3≤2s.

[0117] In this embodiment, controlling the second polishing mechanism 40 to polish the workpiece for 1 to 2 seconds can effectively balance polishing effect and polishing efficiency. The preset time t3 can be 1 second, 1.5 seconds, 2 seconds, 2.5 seconds, or 3 seconds, or any value within the above range.

[0118] In one embodiment of this application, in step S20, the control conveying mechanism 50 conveys the fixing mechanism 10 to the grinding mechanism 20, and the control grinding mechanism 20 grinds the workpiece to be processed; the control grinding mechanism 20 grinds the workpiece to be processed for a preset time t1, satisfying the relationship: 1s≤t1≤2s.

[0119] In this embodiment, controlling the grinding mechanism 20 to grind the workpiece for 1 to 2 seconds can effectively balance grinding effect and grinding efficiency. The preset time t1 can be 1 second, 1.5 seconds, 2 seconds, 2.5 seconds, or 3 seconds, or any value within the above range.

[0120] In one embodiment of this application, in step S10, the step of controlling the fixing mechanism 10 to clamp and fix the workpiece to be processed; the fixing mechanism 10 is controlled to clamp and fix the workpiece to be processed with a preset pressure F4, satisfying the relationship: 0.2N≤F4≤2N.

[0121] In this embodiment, the fixing mechanism 10 clamps and fixes the workpiece with a clamping force of 0.2N to 2N, which can improve the stability of clamping the workpiece without causing pressure damage. The preset pressure F4 can be 0.2N, 0.5N, 1N, 1.5N or 2N, or any value within the above range.

[0122] Please refer to Figure 7 This application also proposes a cylindrical battery 200, which is formed by the above-mentioned trimming device 100. The cylindrical battery 200 includes a shell 201 and a weld 203. The shell 201 includes a shell body 2011 and a top cover 2013. The shell body 2011 is cylindrical and has an opening at one end. The top cover 2013 covers the opening of the shell body 2011. The weld 203 is configured to connect the shell body 2011 and the top cover 2013 and is located at the connection between the side peripheral surface and the end face of the shell 201. The weld 203 includes a first surface 2031, a second surface 2033 and a third surface 2035. The first surface 2031 is located on the side peripheral surface of the shell 201, the second surface 2033 is located on the end face of the shell 201, and the third surface 2035 is connected to the first surface 2031 and the second surface 2033. The third surface 2035 is an outwardly convex arc surface.

[0123] The housing 201 can be used to form a cavity for mounting the electrode assembly and electrolyte of the cylindrical battery 200. The electrode assembly includes a positive electrode, a negative electrode, and a separator located between them, which are wound together. The positive electrode, negative electrode, and separator are formed by winding. The housing body 2011 may have an opening at one end to allow the electrode assembly to be mounted through the opening. The top cover 2013 can close the opening of the housing body 2011 to form a closed space. The side peripheral surface of the housing 201 can be formed by the housing body 2011 and the top cover 2013, while the end face of the housing 201 can be formed by the top cover 2013.

[0124] Weld 203 connects the shell body 2011 and the top cover 2013, and is arranged circumferentially around the shell 201. In a cross-section parallel to the axis of the shell 201, the outer surface of weld 203 includes a first surface 2031, a second surface 2033, and a third surface 2035 that are connected. The first surface 2031 is located on the side circumferential surface of the shell 201, specifically on the shell body 2011, and its shape can be the same as that of the side circumferential surface. It can be formed by polishing by the first polishing mechanism 30 in the dressing device 100. The second surface 2033 is located on the end face of the shell 201, specifically on the top cover 2013, and its shape can be the same as that of the end face. It can be formed by polishing by the second polishing mechanism 40 in the dressing device 100. The third surface 2035 is located between the first surface 2031 and the second surface 2033, and is a convex arc shape. It can be formed by grinding by the grinding mechanism 20 in the dressing device 100.

[0125] In this embodiment, the outer surface of the weld 203 is trimmed by the trimming device 100 to include a third surface 2035 with rounded corners. This achieves rounded corner trimming of the weld 203 at the edge of the workpiece, which can remove defects such as sharp points or protrusions in the weld 203 area at the edge, so that the UV coating can be printed evenly and the risk of missed coating can be reduced.

[0126] Please refer to Figure 7 In one embodiment of this application, the radius of the third surface 2035 is defined as R1, which satisfies the relationship: 0.34 mm ≤ R1 ≤ 0.48 mm.

[0127] In this embodiment, the radius R1 of the third surface 2035 is set to 0.34 mm to 0.48 mm, which makes the rounded corner size formed by the third surface 2035 more suitable, so that the subsequent printing can be uniformly performed on the first surface 2031, the second surface 2033 and the third surface 2035 of the entire weld 203.

[0128] Please refer to Figure 7 In one embodiment of this application, the span angle from one end of the third surface 2035 connected to the first surface 2031 to one end connected to the second surface 2033 is defined as β, satisfying the relationship: 85°≤β≤95°.

[0129] In this embodiment, the span angle β is set to 85° to 95° to facilitate a smoother connection between the two ends of the third surface 2035 and the first surface 2031 and the second surface 2033. This allows for smoother printing on the first surface 2031, the second surface 2033, and the third surface 2035 of the weld 203, improving printing uniformity. The span angle β can be 85°, 90°, or 95°, or any value within this range.

[0130] In one embodiment of this application, the roughness of the first surface 2031 is greater than the roughness of the second surface 2033.

[0131] In this embodiment, the roughness of the first surface 2031 is set to be greater than that of the second surface 2033, which can help avoid scratches and wear during subsequent assembly and improve the stability of the cylindrical battery 200 assembly.

[0132] Please refer to Figure 7 In one embodiment of this application, the dimension of the first surface 2031 in the axial direction of the housing 201 is defined as L3, and the dimension of the top cover 2013 in the axial direction of the housing 201 is defined as L4, satisfying the relationship: 0.5≤L3 / L4≤0.7.

[0133] In this embodiment, setting the ratio of L3 to L4 to 0.5 to 0.7 allows the first surface 2031 to have a suitable height in the axial direction of the housing 201, thus balancing the welding connection effect between the housing body 2011 and the top cover 2013, as well as the overall strength and manufacturing cost of the housing 201. Similarly, in one embodiment of this application, the dimension between the end of the second surface 2033 connected to the third surface 2035 and the end away from the third surface 2035 is defined as L5, and the radius of the housing 201 is R2, satisfying the relationship: 0.03≤L5 / R2≤0.05.

[0134] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A trimming device, characterized in that, include: A fixing mechanism includes a first driving member and a fixing component. The fixing component is connected to the first driving member and configured to fix the workpiece to be processed. The first driving member is configured to drive the fixing component to rotate about an axis parallel to a first direction. and A grinding mechanism comprising at least two pulleys and an abrasive belt, the abrasive belt being wound around the at least two pulleys; the abrasive belt having a grinding section configured to grind the workpiece located on the fixed assembly, the plane of the grinding section intersecting the first direction; The angle between the plane containing the grinding section and the first direction toward the fixing mechanism is defined as α, satisfying the relationship: 40°≤α≤50°; The grinding mechanism further includes a carrier component, on which at least two of the pulleys are rotatably disposed; the grinding mechanism further includes a second driving component, which is connected to the carrier component and configured to drive the carrier component to rotate about an axis parallel to the pulleys. The grinding mechanism further includes a third driving member, which is connected to at least one of the pulleys and configured to drive the pulleys to rotate; The dressing device further includes a first polishing mechanism and a second polishing mechanism. The first polishing mechanism includes a first polishing wheel, and the second polishing mechanism includes a second polishing wheel. The axes of the first polishing wheel and the second polishing wheel are both parallel to the first direction. The first polishing wheel has a first polishing surface, which is arranged around the axis of the first polishing wheel and configured to polish the workpiece located on the fixed assembly. The second polishing wheel has a second polishing surface, which is arranged perpendicular to the axis of the second polishing wheel and configured to polish the workpiece located on the fixed assembly. The dressing device further includes a conveying mechanism, which is configured to convey the fixed assembly. The grinding mechanism, the first polishing mechanism, and the second polishing mechanism are all located on the conveying path of the conveying mechanism, and the first polishing mechanism and the second polishing mechanism are located downstream of the grinding mechanism.

2. The trimming device as described in claim 1, characterized in that, The number of pulleys is at least three, and the at least three pulleys include two support pulleys and at least one adjusting pulley; Two support wheels are rotatably disposed on the carrier, and an adjusting wheel is rotatably and slidably disposed on the carrier along its radial direction. The abrasive belt located between the two support wheels is configured as the grinding section.

3. The trimming device as described in claim 1, characterized in that, The tension of the abrasive belt is defined as F1, which satisfies the relationship: 0.5N≤F1≤1.5N.

4. The trimming device as described in claim 1, characterized in that, Let P be the mesh size of the sand belt, satisfying the relationship: 240≤P≤400.

5. The trimming device as described in claim 1, characterized in that, The rotational speed of the third driving component is defined as N1, satisfying the relationship: 2000r / min≤N1≤5000r / min.

6. The trimming device as claimed in claim 1, characterized in that, The abrasive belt is made of alumina, silicon nitride, or zirconium corundum.

7. The trimming device as claimed in claim 1, characterized in that, The rotational speed of the first driving component is defined as N2, which satisfies the relationship: 360r / min≤N2≤720r / min.

8. The trimming device as claimed in claim 1, characterized in that, The first polishing mechanism further includes a fourth driving member, which is connected to the first polishing wheel and configured to drive the first polishing wheel to rotate; the rotational speed of the fourth driving member is defined as N3, satisfying the relationship: 1000r / min≤N3≤3000r / min; And / or, the second polishing mechanism further includes a fifth driving member connected to the second polishing wheel, the fifth driving member being configured to drive the second polishing wheel to rotate; The rotational speed of the fifth driving component is defined as N4, satisfying the relationship: 800r / min≤N4≤2000r / min; And / or, the first polishing wheel is made of polyurethane or nylon; And / or, the material of the second polishing wheel is a cloth wheel or a nylon wheel.

9. The trimming device as claimed in claim 1, characterized in that, The finishing device also includes a detection mechanism, which is located on the conveying path of the conveying mechanism and downstream of the grinding mechanism, the first polishing mechanism and the second polishing mechanism. The detection mechanism is configured to capture images to detect the grinding and polishing quality of the workpiece located on the fixed assembly. The detection mechanism includes a first detection camera and a second detection camera. The optical axis of the first detection camera is parallel to the first direction, and the optical axis of the second detection camera intersects the first direction.

10. A control method for a trimming device, characterized in that, The trimming device described in any one of claims 1 to 9, wherein the control method of the trimming device includes the following steps: Control and fix the workpiece to be processed by the fixing mechanism; The control conveying mechanism transports the fixing mechanism to the grinding mechanism, and controls the grinding mechanism to grind the workpiece; The control conveying mechanism transports the fixing mechanism to the first polishing mechanism, and controls the first polishing mechanism to polish the workpiece to be processed; The control conveying mechanism transports the fixing mechanism to the second polishing mechanism, and controls the second polishing mechanism to polish the workpiece.

11. The control method for the trimming device as described in claim 10, characterized in that, In the step of controlling the conveying mechanism to convey the fixing mechanism to the first polishing mechanism, and controlling the first polishing mechanism to polish the workpiece; The first polishing mechanism is controlled to polish the workpiece with a preset pressure F2, satisfying the relationship: 0.5N≤F2≤2N; And / or, control the first polishing wheel of the first polishing mechanism to reciprocate along the first direction with a preset stroke L1, satisfying the relationship: 1 mm ≤ L1 ≤ 3 mm; And / or, control the first polishing mechanism to polish the workpiece for a preset time t2, satisfying the relationship: 1s≤t2≤2s.

12. The control method for the trimming device as described in claim 10, characterized in that, In the step of controlling the conveying mechanism to convey the fixing mechanism to the second polishing mechanism, and controlling the second polishing mechanism to polish the workpiece; The second polishing mechanism is controlled to polish the workpiece at a preset pressure F3, satisfying the relationship: 0.3N≤F3≤1.5N; And / or, control the second polishing wheel of the second polishing mechanism to reciprocate along the radial direction of the second polishing wheel with a preset stroke L2, satisfying the relationship: 1 mm ≤ L2 ≤ 3 mm; And / or, control the second polishing mechanism to polish the workpiece for a preset time t3, satisfying the relationship: 1s≤t3≤2s.

13. The control method for the trimming device as described in claim 10, characterized in that, In the step of controlling the conveying mechanism to convey the fixing mechanism to the grinding mechanism, and controlling the grinding mechanism to grind the workpiece; The grinding mechanism is controlled to grind the workpiece for a preset time t1, satisfying the relationship: 1s≤t1≤2s.

14. The control method for the trimming device as described in claim 10, characterized in that, In the step of controlling the fixing mechanism to clamp and fix the workpiece to be processed; The fixing mechanism is controlled to clamp and fix the workpiece to be processed with a preset pressure F4, satisfying the relationship: 0.2N≤F4≤2N.

15. A cylindrical battery, characterized in that, The cylindrical battery, formed by processing using the finishing device as described in any one of claims 1 to 9, comprises: A housing, comprising a housing body and a top cover, wherein the housing body is cylindrical and has an opening at one end; the top cover closes to the opening of the housing body; and A weld, configured to connect the shell body and the top cover, and located at the connection between the side peripheral surface and the end face of the shell, the weld including a first surface, a second surface and a third surface; The first surface is disposed on the side circumferential surface of the housing, the second surface is disposed on the end face of the housing, and the third surface is connected to the first surface and the second surface, and the third surface is an outwardly convex arc surface.

16. The cylindrical battery as described in claim 15, characterized in that, The radius of the third surface is defined as R1, satisfying the relationship: 0.34 mm ≤ R1 ≤ 0.48 mm; And / or, define the span angle β from one end of the third surface connected to the first surface to one end connected to the second surface, satisfying the relationship: 85°≤β≤95°; And / or, the roughness of the first surface is greater than the roughness of the second surface; And / or, define the dimension of the first surface in the axial direction of the housing as L3, and the dimension of the top cover in the axial direction of the housing as L4, satisfying the relationship: 0.5≤L3 / L4≤0.7; And / or, define the dimension L5 between the end of the second surface connected to the third surface and the end away from the third surface, and the radius of the housing as R2, satisfying the relationship: 0.03≤L5 / R2≤0.05.

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