An automatic copper foil cutting machine

Abstract

The present invention provides an automatic copper foil cutting machine, belonging to the technical field of copper foil processing. The automatic copper foil cutting machine includes two mirror-image arranged brackets, and is characterized in that it further includes: a lower cutting knife unit, arranged between the two brackets, the lower cutting knife unit includes a lower die and a lower blade, both ends of the lower die are respectively fixed on the two brackets, and the lower blade is arranged on the lower die; an upper cutting knife unit, arranged between the two brackets and capable of sliding up and down on the brackets, the upper cutting knife unit includes an upper die and an upper blade, the upper blade is inclined on the upper die so that one end of the cutting edge is higher than the other end; by arranging the upper blade and the lower blade in a cross manner and setting the intersection point near one end, and at the same time pushing the upper blade against the lower blade all the time through an elastic member, when cutting the copper foil, the generation of cutting defects caused by the gap between the upper blade and the lower blade can be avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of copper foil processing, and particularly relates to an automatic copper foil cutting machine. Background Art

[0002] Copper foil, especially electronic-grade copper foil, as one of the important basic materials in the electronics industry, with the rapid development of the electronic information industry, its usage is increasing and the application fields are also expanding. Among them, the copper foil used in printed circuit boards and lithium-ion batteries has the largest consumption.

[0003] Before copper foil is further used for the processing of other finished parts, it usually needs to be cut to obtain copper foil blocks with appropriate sizes. Generally, a cutting machine is used for the cutting operation of copper foil.

[0004] In a Chinese patent with the authorization announcement number CN215790081U, an automatic copper foil cutting machine is disclosed, which includes a frame, a feeding table and a controller arranged on the frame. A cutting assembly is provided on the feeding table. The cutting assembly includes a cutting frame, a cutting knife installed on the cutting frame, and a pressing knife assembly for driving the cutting knife to reciprocate up and down. The cutting assembly realizes quantitative cutting under the control of the controller. A transmission assembly is provided at one end of the feeding table close to the cutting assembly. The transmission assembly realizes incremental feeding of the copper foil width dimension under the control of the controller, with full-automatic cutting, replacing manual measurement by workers, improving the cutting accuracy, and being able to automatically cut a quantitative stack of copper foils.

[0005] In the above technical solution, the upper cutting knife and the lower cutting knife are usually arranged in parallel. After long-term cutting, the sides of the cutting knives will be worn to varying degrees, resulting in an increase in the distance between the upper cutting knife and the lower cutting knife. When the distance between the upper cutting knife and the lower cutting knife increases, it will affect the cutting effect of the copper foil and easily cause serious curling of the copper foil. Summary of the Invention

[0006] The purpose of the present invention is to provide an automatic copper foil cutting machine, aiming to solve the problem that the upper cutting knife and the lower cutting knife in the existing automatic copper foil cutting machine will wear, resulting in an increase in the gap between the upper cutting knife and the lower cutting knife, which affects the cutting effect of the copper foil.

[0007] To achieve the above purpose, the present invention provides the following technical solution: An automatic copper foil cutting machine, including: two mirror-image arranged brackets, characterized by further including:

[0008] A lower cutting knife unit, arranged between the two brackets. The lower cutting knife unit includes a lower die and a lower blade. The two ends of the lower die are respectively fixed on the two brackets, and the lower blade is arranged on the lower die;

[0009] The upper cutting knife unit is arranged between two brackets and can slide up and down on the brackets. The upper cutting knife unit includes an upper die and an upper blade. The upper blade is inclined on the upper die so that one end of the blade edge is higher than the other end, and the blade edge is arranged opposite to the blade edge of the lower blade. The upper die is located at the lower end of the blade edge of the upper blade and can rotate relative to the bracket. Its rotation axis is perpendicular to the ground. An elastic member is arranged at the other end of the upper die. The elastic member can push the upper die to rotate. When the elastic member is in the natural state, the upper blade on the upper die intersects with the lower blade on the lower die.

[0010] The hydraulic equipment is arranged on the bracket and can drive the upper cutting knife unit to perform lifting actions.

[0011] A further technical solution of the present invention is that first sliders and second sliders are arranged at both ends of the upper die. Slide rails are vertically arranged on both brackets. The first slider and the second slider slide on the two slide rails respectively. The first slider is located on the upper die and is close to the end where the blade edges of the upper blade and the lower blade approach each other, and the second slider is located at the other end of the upper die.

[0012] A further technical solution of the present invention is that a connecting member is arranged on the first slider. The connecting member rotates on the first slider through a rotating shaft, and the axis of the rotating shaft is perpendicular to the ground.

[0013] A further technical solution of the present invention is that a chamber is designed inside the second slider. A convex block located inside the chamber is arranged at one end of the upper die close to the second slider. The convex block can slide inside the chamber. The elastic member is arranged inside the chamber, and one end of it abuts against the convex block. When the elastic member is in the natural state, the convex block is closely attached to one side of the chamber.

[0014] A further technical solution of the present invention is that a resisting column penetrating to the outside of the second slider is arranged inside the chamber. One end of the resisting column abuts against the end of the elastic member away from the convex block. A resisting block is arranged on the bracket. An inclined surface is arranged on the resisting block. The resisting column abuts against the inclined surface. When the upper blade moves downward, through the guidance of the inclined surface, the resisting column is pushed to move inside the chamber and compress the elastic member.

[0015] A further technical solution of the present invention is that, in the upper blade, the distance between the lower end of the blade edge and the blade edge of the lower blade is smaller than the distance between the other end of the blade edge of the upper blade and the blade edge of the lower blade.

[0016] A further technical solution of the present invention is that the distance between the lower end of the blade edge of the upper blade and the blade edge of the lower blade is 0.1 mm - 1 mm, and the distance between the other end of the upper blade and the blade edge of the lower blade is 1 mm and 10 mm.

[0017] A further technical solution of the present invention is that the bump is in close contact with the upper and lower inner walls of the chamber.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. By arranging the upper blade and the lower blade in a cross manner and setting the intersection point near one end, and at the same time pushing the upper blade against the lower blade by the elastic member all the time, when cutting the copper foil, the gap between the upper blade and the lower blade can be avoided from causing cutting defects.

[0020] 2. By arranging the abutting post and the abutting block, the pressure of the elastic member on the bump can be increased, and then the friction force between the upper blade and the lower blade can be gradually increased, so that the friction force between the two can be kept as stable as possible when shearing the copper foil. This improvement effectively avoids the problems of poor cutting quality and inconsistent blade wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0022] Figure 1 is a schematic structural diagram of the cutting machine in the specific embodiment of the present invention;

[0023] Figure 2 is a schematic structural diagram of the cutting mechanism in the specific embodiment of the present invention;

[0024] Figure 3 is the front view of the cutting mechanism in the specific embodiment of the present invention;

[0025] Figure 4 is a schematic structural diagram of the cooperation between the upper cutting knife unit and the lower cutting knife unit in the specific embodiment of the present invention;

[0026] Figure 5 is a schematic structural diagram of the connection between the first slider and the connecting member in the specific embodiment of the present invention;

[0027] Figure 6 is a schematic structural diagram of the installation of the second slider and the upper tool die in the specific embodiment of the present invention;

[0028] Figure 7 is a schematic structural diagram of the cooperation between the lower blade and the upper blade in the specific embodiment of the present invention;

[0029] Figure 8 is Figure 7 a schematic enlarged view of the structure at A in

[0030] Figure 9Schematic diagram of the cooperation structure of the abutting block and the abutting column in the specific embodiment of the present invention;

[0031] Figure 10 Schematic diagram of the structure where the cutting edge of the upper blade is inclined in the specific embodiment of the present invention.

[0032] In the figure: 1, unwind mechanism; 2, cutting mechanism; 21, bracket; 22, upper cutting knife unit; 221, upper die; 222, upper blade; 223, first slider; 224, second slider; 225, connecting member; 226, chamber; 227, convex block; 228, elastic member; 23, lower cutting knife unit; 231, lower die; 232, lower blade; 3, feeding mechanism; 4, slide rail; 5, hydraulic equipment; 6, abutting column; 7, abutting block; 71, inclined surface. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1-10 , the present invention provides the following technical solutions: An automatic copper foil cutting machine is composed of an unwind mechanism 1, a cutting mechanism 2 and a feeding mechanism 3. Among them, the cutting mechanism 2 is arranged between the unwind mechanism 1 and the feeding mechanism 3 to form a smooth operation process. The unwind mechanism 1 is responsible for smoothly unwinding the rolled copper foil raw material and transporting it to the working area of the cutting mechanism 2. The cutting mechanism 2, with its high-precision performance, ensures that the copper foil can be evenly and accurately divided. The cut copper foil will fall on the feeding mechanism 3. Subsequently, with the help of robot technology, these cut copper foils will be stacked orderly, greatly improving the production efficiency and automation level;

[0035] At the critical moment when the cutting mechanism 2 performs the cutting operation on the copper foil, in order to ensure that the cutting accuracy is not disturbed, the unwind mechanism 1 will temporarily suspend the transportation of the copper foil. This operation aims to avoid cutting errors that may be caused by continuous feeding, which is a common technical problem in the industry. It is worth noting that through the application of automatic control technology, it has been able to maturely achieve the coordinated opening and closing between the unwind mechanism 1 and the cutting mechanism 2, that is, the unwind mechanism 1 can adjust its working state according to the cutting requirements. For the specific implementation of this technology, since it is widely recognized and applied, it will not be elaborated in detail here.

[0036] Please refer to Figures 2-4, the cutting mechanism 2 is composed of two symmetrically arranged brackets 21, and these brackets 21 are fixedly installed in a vertical posture. Between the two brackets 21, an upper cutting knife unit 22 and a lower cutting knife unit 23 are assembled, and they are arranged in a relative manner. Specifically, the lower cutting knife unit 23 is fixed on the bracket 21, while the upper cutting knife unit 22 can slide up and down on the bracket 21. In addition, two hydraulic devices 5 are also configured on the bracket 21. These hydraulic devices 5 are installed on the bracket 21 through screws, and their telescopic ends are connected to the upper cutting knife unit 22. In this way, the hydraulic device 5 can drive the upper cutting knife unit 22 to perform smooth up and down sliding actions.

[0037] Please refer to Figures 2-3 , in order to ensure that the upper cutting knife unit 22 can slide smoothly and stably, two vertically arranged slide rails 4 are carefully installed on the bracket 21. These two slide rails 4 are perpendicular to the ground and are tightly fixed on the bracket 21 through screws. The upper cutting knife unit 22 can slide smoothly along the track of the slide rail 4. Thanks to the precise guiding effect of the slide rail 4, the stability and reliability of the upper cutting knife unit 22 during the sliding process are greatly improved.

[0038] Please refer to Figures 3-4 , the lower cutting knife unit 23 is mainly composed of a lower die 231 and a lower blade 232. The lower die 231 is in the form of an L-shaped long strip at the interface and is horizontally erected between the two brackets 21. Its two ends are firmly fixed on the brackets 21 through bolt connection or welding technology. The lower blade 232 is arranged on the lower die 231 along the length direction of the lower die 231 and is tightly connected to the lower die 231 through bolts. It should be noted that the cutting edge part of the lower blade 232 after installation slightly protrudes above the upper surface of the lower die 231 to ensure the accuracy and efficiency of the cutting operation.

[0039] Please continue to refer to Figures 3-4 , the upper cutting knife unit 22 is composed of an upper die 221 and an upper blade 222. Among them, the upper blade 222 is installed on the upper die 221 at an inclined angle, that is, one end of its cutting edge is at a higher position than the other end (as Figure 10 shown). Subsequently, the upper blade 222 is firmly fixed on the upper die 221 through fastening screws. In addition, for convenient use, it is also possible to directly purchase customized blades with an inclined cutting edge design.

[0040] When using this inclined upper blade 222 to cut the copper foil, a shear angle of approximately 1° will naturally form between its blade edge and the blade edge of the lower blade 232. It is by utilizing the shearing force brought about by this shear angle that the copper foil can be effectively cut. At the same time, in order to ensure the stable and precise movement of the upper cutting unit 22, the two ends of the upper die 221 are respectively equipped with a first slider 223 and a second slider 224. Among them, the first slider 223 is arranged on the upper die 221 and near one end where the blade edges of the upper blade 222 and the lower blade 232 approach each other, while the second slider 224 is located at the other end of the upper die 221. These two sliders slide along two slide rails 4 respectively and are connected to the telescopic end of the hydraulic device 5 to achieve power transmission.

[0041] When the hydraulic device 5 is driven, it can drive the first slider 223 and the second slider 224 to slide smoothly on the slide rails 4. As these two sliders move, the upper die 221 and the upper blade 222 thereon will also move up and down accordingly. It is through this precise up and down movement that the upper blade 222 can accurately press down on the copper foil to complete the cutting operation.

[0042] Please refer to Figures 4-7 , a connecting piece 225 is installed on the first slider 223, and the first slider 223 has a rotating shaft. The axis of this rotating shaft is perpendicular to the ground, enabling the connecting piece 225 to rotate smoothly around it. Between the connecting piece 225 and the upper die 221, they can be fixed by screw connection or welding to ensure the structural stability. Therefore, both the upper die 221 and the upper blade 222 carried thereon can perform flexible rotational movements with the rotating shaft as the central axis.

[0043] A chamber 226 is designed inside the second slider 224, and a convex block 227 is provided at one end of the upper die 221 adjacent to the second slider 224. This convex block 227 extends into the interior of the chamber 226 and closely fits with the upper and lower inner walls of the chamber 226. When the upper die 221 rotates around the rotating shaft installed on the first slider 223, the convex block 227 will slide inside the chamber 226. An elastic member 228 is also installed inside the chamber 226, which can push the convex block 227 against one side of the chamber 226, thereby ensuring that the blade edges of the upper blade 222 and the lower blade 232 form a cross layout in the top-down view.

[0044] Specifically, please refer to Figure 7 and Figure 8, it can be clearly seen that the lower end of the cutting edge of the upper blade 222 is located on the left side of the cutting edge of the lower blade 232, and the linear distance between the two is a, where the value of a is between 0.1 mm and 1 mm; while the other end of the cutting edge of the upper blade 222 is located on the right side of the cutting edge of the lower blade 232, and the linear distance between the two is b, and the value of b is between 1 mm and 10 mm. Such a design not only makes the cutting edges of the upper blade 222 and the lower blade 232 present a crossed shape in the top view, but also makes the crossing point closer to the first slider 223.

[0045] The working principle is as follows: During the process of cutting the copper foil, the hydraulic device 5 drives the upper blade 222 to slowly press down until the cutting edges of the upper blade 222 and the lower blade 232 meet on the side close to the first slider 223, forming a dynamic cutting point. As the upper blade 222 continues to descend steadily, this cutting point moves along the cutting edge trajectory, thereby realizing the effective cutting of the copper foil.

[0046] Furthermore, the continuous downward pressing of the upper blade 222 not only promotes the cutting process, but also causes the lower blade 232 to drive the upper tool die 221 to slightly swing through the rotating shaft on the first slider 223. This swinging action causes the convex block 227 on the upper tool die 221 to move correspondingly in the chamber 226 and compresses the built-in elastic member 228.

[0047] When the cutting is completed, the upper blade 222 rises and resets under the control of the hydraulic device 5. At this time, relying on its restoring force, the elastic member 228 helps the upper tool die 221 to return to the initial position, making full preparations for the next cutting operation. This function of the elastic member 228 ensures that during the entire cutting cycle, the upper blade 222 and the lower blade 232 can always maintain close and stable contact, thus ensuring the consistency of the cutting quality.

[0048] In addition, when the blades gradually wear due to long-term use, the gap generated between the upper blade 222 and the lower blade 232 can be compensated by the elastic member 228 pushing the upper blade 222 to rotate. It effectively prevents the cutting quality problems caused by the excessive gap between the upper blade 222 and the lower blade 232, ensuring the accuracy and reliability of the copper foil cutting.

[0049] Please refer to Figure 6 and Figure 9 , a resisting post 6 is designed on the second slider 224. It can penetrate the chamber 226 and extend to the outside of the second slider 224, and can realize the telescopic sliding function on the second slider 224. One end of the elastic member 228 away from the convex block 227 is closely attached to one end of the resisting post 6. When the resisting post 6 is pushed into the second slider 224, the elastic member 228 will be correspondingly compressed.

[0050] A stopper 7 is mounted on the bracket 21, and the stopper 7 is firmly connected to the bracket 21 by screws. The surface of the stopper 7 is designed with an inclined surface 71, the bottom of the inclined surface 71 is close to the second slider 224, and the top of the inclined surface 71 gradually moves away from the second slider 224. Such a design enables the upper blade 222 to move downward, with the help of the inclined surface 71, to push the stopper 6 to move into the chamber 226 and compress the elastic member 228.

[0051] In this process, the upper die 221 not only applies pressure to one end of the elastic member 228 through the protrusion 227, but also the support column 6 compresses the elastic member 228 from the other end. This means that the support column 6 and the protrusion 227 can synchronously and effectively compress the elastic member 228 in both directions.

[0052] When the lower blade 232 pushes the upper blade 222 to rotate, according to the lever principle, as the intersection of the upper blade 222 and the lower blade 232 is closer to the rotation axis position of the first slider 223, the generated force arm will be shorter, which will increase the friction between the upper blade 222 and the lower blade 232. On the contrary, when the intersection gradually moves away from the rotation axis, the force arm becomes longer, and the friction between the two decreases accordingly. Therefore, during the process of cutting the copper foil, the friction between the upper blade 222 and the lower blade 232 shows a trend of gradually decreasing. This change in friction often leads to uneven quality on both sides of the copper foil cutting edge, and there will also be differences in the degree of wear at both ends of the blade.

[0053] In order to solve this problem, when the upper blade 222 moves downward to cut the copper foil, the elastic member 228 gradually applies pressure to the bump 227 through the interaction between the inclined surface 71 and the abutment 6. This design is intended to gradually increase the friction between the upper blade 222 and the lower blade 232 during the process of cutting the copper foil, so that the friction between the two can be kept as stable as possible when cutting the copper foil. This improvement effectively avoids the problems of poor cutting quality and inconsistent blade wear.

[0054] The feeding mechanism 3 and the unwinding mechanism 1 are both prior art, and their specific structures will not be described in detail.

Claims

1. An automatic copper foil cutting machine, comprising: Two mirror-image arranged brackets (21), characterized in that it further comprises: A lower cutting knife unit (23) is arranged between the two brackets (21). The lower cutting knife unit (23) includes a lower die (231) and a lower blade (232). Both ends of the lower die (231) are respectively fixed on the two brackets (21), and the lower blade (232) is arranged on the lower die (231); An upper cutting knife unit (22) is arranged between the two brackets (21) and can slide up and down on the brackets (21). The upper cutting knife unit (22) includes an upper die (221) and an upper blade (222). The upper blade (222) is inclined on the upper die (221) such that one end of the blade edge is higher than the other end, and the blade edge is arranged opposite to the blade edge of the lower blade (232). The upper die (221) is located at the lower end of the blade edge of the upper blade (222) and can rotate relative to the bracket (21), and its rotation axis is perpendicular to the ground. An elastic member (228) is arranged at the other end of the upper die (221), and the elastic member (228) can push the upper die (221) to rotate. When the elastic member (228) is in the natural state, the upper blade (222) on the upper die (221) intersects with the lower blade (232) on the lower die (231); First sliders (223) and second sliders (224) are arranged at both ends of the upper die (221). A chamber (226) is designed inside the second slider (224). A convex block (227) located inside the chamber (226) is arranged at one end of the upper die (221) close to the second slider (224). The convex block (227) can slide inside the chamber (226). The elastic member (228) is arranged inside the chamber (226), and one end of it abuts against the convex block (227). When the elastic member (228) is in the natural state, the convex block (227) is close to one side of the chamber (226); A resisting column (6) penetrating to the outside of the second slider (224) is arranged inside the chamber (226). One end of the resisting column (6) abuts against the end of the elastic member (228) away from the convex block (227). A resisting block (7) is arranged on the bracket (21), and an inclined surface (71) is arranged on the resisting block (7). The resisting column (6) abuts against the inclined surface (71). When the upper blade (222) moves downward, under the guidance of the inclined surface (71), the resisting column (6) is pushed to move inside the chamber (226) and compress the elastic member (228); A hydraulic device (5) is arranged on the bracket (21) and can drive the upper cutting knife unit (22) to perform lifting actions.

2. The automatic copper foil cutting machine according to claim 1, wherein: Guide rails (4) are vertically arranged on both of the two brackets (21). The first slider (223) and the second slider (224) respectively slide on the two guide rails (4). The first slider (223) is located on the upper die (221) and close to one end where the blade edges of the upper blade (222) and the lower blade (232) approach each other, and the second slider (224) is located at the other end of the upper die (221).

3. The automatic copper foil cutting machine according to claim 2, characterized in that: A connecting member (225) is provided on the first slider (223). The connecting member (225) rotates on the first slider (223) through a rotating shaft, and the axis of the rotating shaft is perpendicular to the ground.

4. The automatic copper foil cutting machine according to claim 1, characterized in that: In the upper blade (222), the distance between the lower end of the blade edge and the blade edge of the lower blade (232) is smaller than the distance between the other end of the blade edge of the upper blade (222) and the blade edge of the lower blade (232).

5. The automatic copper foil cutting machine according to claim 4, characterized in that: The distance between the lower end of the blade edge of the upper blade (222) and the blade edge of the lower blade (232) is 0.1 mm - 1 mm, and the distance between the other end of the upper blade (222) and the blade edge of the lower blade (232) is 1 mm to 10 mm.

6. The automatic copper foil cutting machine according to claim 1, characterized in that: The convex block (227) is in close fit with the upper and lower inner walls of the chamber (226).

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