Soft copper bar cutting tool

Abstract

The utility model belongs to cutting device technical field, concretely relates to a soft copper bar cutting tool, including roller body and roller axle, roller axle sets up at both ends of roller body, the outer circumferential side of roller body is provided with cutting edge, the cutting edge ring is equipped with cavity, the cutting edge includes first knife face, second knife face and transition surface, first knife face is located at the side of cutting edge face to cavity, second knife face is located at the side of cutting edge away from cavity, transition surface connects first knife face with second knife face, first knife face and the radial direction of roller body form first included angle P, satisfy the relation formula: 5 degree <= P <= 9 degree, the instantaneous radial extrusion force of soft copper bar cutting tool to soft copper bar cutting seam side wall has been reduced, thereby effectively reduce the generation of burr and flanging at the cut, this makes the cut cross section more even, improves the size accuracy of soft copper bar.

Description

Technical Field

[0001] This utility model belongs to the technical field of cutting devices, specifically relating to a soft copper busbar cutting tool. Background Technology

[0002] Due to its excellent conductivity, good bending performance, and fatigue resistance, soft copper busbars are widely used in new energy vehicles, energy storage equipment, power transmission and distribution equipment, and other fields as a key connection component for current transmission. In the production and processing of soft copper busbars, cutting is an indispensable process, and its quality directly affects the connection accuracy, conductivity stability, and subsequent assembly efficiency of the soft copper busbar.

[0003] Traditional cutting of soft copper busbars often uses flat-blade or conventional disc cutters. During the cutting process, due to the softness and high ductility of the copper busbar material, the blade easily generates significant radial extrusion force when in contact with the material, leading to burrs, flaking, or localized deformation at the cut edge. This not only affects the product's appearance and dimensional accuracy but may also cause safety hazards such as partial discharge, poor contact, or even overheating during subsequent use due to burrs or uneven cuts. Utility Model Content

[0004] The purpose of this utility model is to provide a soft copper busbar cutting tool to address the shortcomings of the existing technology. This tool solves the problem that in the existing technology, when cutting soft copper busbars, flat blade tools or conventional disc tools are used. Due to the material characteristics of soft copper busbars, the tool generates a large radial extrusion force when it comes into contact with the material during cutting, which causes burrs, flanging, or local deformation of the cut, affecting the appearance and dimensional accuracy, and may also cause safety hazards in subsequent use.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a soft copper busbar cutting tool, including a roller body and a roller shaft. The roller shaft is disposed at both ends of the roller body. A cutting edge is disposed on the outer periphery of the roller body. The cutting edge is arranged in a cavity. The cutting edge includes a first cutting surface, a second cutting surface, and a transition surface. The first cutting surface is located on the side of the cutting edge facing the cavity, and the second cutting surface is located on the side of the cutting edge away from the cavity. The transition surface connects the first cutting surface and the second cutting surface. The first cutting surface forms a first included angle P with the radial direction of the roller body, satisfying the relationship: 5°≤P≤9°.

[0007] In some embodiments, a second included angle T is formed between the second blade and the radial direction of the roller body, satisfying the relationship: T≥P.

[0008] In some embodiments, a third included angle Y is formed between the first cutting face and the second cutting face, satisfying the relationship: T+P=Y.

[0009] In some embodiments, the first included angle P and the second included angle T satisfy the relationship: 7°≤T-P≤11°.

[0010] In some embodiments, the second included angle T satisfies the relationship: 14°≤T≤18°.

[0011] In some embodiments, the width L of the transition surface satisfies the relationship: 0.01mm≤L≤0.02mm.

[0012] In some embodiments, the transition surface is a flat surface or a circular arc surface.

[0013] In some embodiments, the height H of the blade satisfies the following relationship: 1mm≤H≤2mm;

[0014] And / or, the two ends of the roller body are connected to roller shoulders through the roller shaft, and the height difference W between the roller shoulder and the blade satisfies the relationship: 0.01mm≤H≤0.15mm.

[0015] In some embodiments, at least one blade group is provided on the outer peripheral side of the roller body, and each blade group includes a plurality of blades, which are spaced apart around the outer peripheral side of the roller body.

[0016] In some embodiments, multiple blade groups are provided, and the multiple blade groups are spaced apart along the central axis of the roller body.

[0017] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0018] This utility model discloses a soft copper busbar cutting tool. Through the cooperation of a roller body and a roller shaft, a cutting edge is provided on the outer periphery of the roller body. The cutting edge is arranged in a cavity. After cutting, the shape of the finished product corresponds to the cavity. The cutting edge includes a first cutting surface, a second cutting surface, and a transition surface. By ensuring that the first included angle P is 5°≤P≤9°, the force direction when the cutting edge cuts into the soft copper busbar is effectively changed. This transforms the cutting process from mainly vertical extrusion to a component force with a certain degree of oblique shearing, reducing the instantaneous radial extrusion force of the soft copper busbar cutting tool on the side wall of the cut. This effectively reduces the generation of burrs and flaking at the cut, resulting in a smoother cut section, improving the dimensional accuracy of the soft copper busbar, and avoiding safety risks such as partial discharge and poor contact caused by burrs during subsequent assembly, as well as loose connections and overheating caused by dimensional deviations.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is one of the structural schematic diagrams of the soft copper busbar cutting tool of this utility model.

[0022] Figure 2 This is the second structural schematic diagram of the soft copper busbar cutting tool of this utility model.

[0023] Figure 3 for Figure 2 A magnified structural diagram of point A in the middle.

[0024] The reference numerals in the attached figures are explained as follows:

[0025] 100. Soft copper busbar cutting tool;

[0026] 10. Roller body;

[0027] 20. Roller shaft; 21. Roller shoulder;

[0028] 30. Blade; 31. Cavity; 32. First cutting face; 33. Second cutting face; 34. Transition surface;

[0029] a. Radial direction of the roller; b. Direction of the central axis of the roller. Detailed Implementation

[0030] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0031] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The following will be combined with the appendix Figures 1-3 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0034] Please see Figures 1-3 The soft copper busbar cutting tool 100 of this utility model embodiment includes a roller body 10 and a roller shaft 20. The roller shaft 20 is disposed at both ends of the roller body 10. A blade 30 is disposed on the outer periphery of the roller body 10. The blade 30 is arranged in a cavity 31. The blade 30 includes a first cutting surface 32, a second cutting surface 33 and a transition surface 34. The first cutting surface 32 is located on the side of the blade 30 facing the cavity 31, and the second cutting surface 33 is located on the side of the blade 30 away from the cavity 31. The transition surface 34 connects the first cutting surface 32 and the second cutting surface 33. The first cutting surface 32 and the radial direction a of the roller body 10 form a first included angle P, which satisfies the relationship: 5°≤P≤9°.

[0035] Compared with the prior art, the soft copper busbar cutting tool 100 of this utility model uses the cooperation of roller body 10 and roller shaft 20. The outer periphery of roller body 10 is provided with a blade 30, and the blade 30 is arranged in a cavity 31. After cutting, the shape of the finished product corresponds to that of the cavity 31. The blade 30 includes a first cutting surface 32, a second cutting surface 33 and a transition surface 34. By satisfying the first included angle P as 5°≤P≤9°, the force direction of the blade 30 when cutting into the soft copper busbar is effectively changed, so that the cutting process changes from the traditional vertical extrusion to a component force with a certain oblique shearing. This reduces the instantaneous radial extrusion force of the soft copper busbar cutting tool 100 on the side wall of the soft copper busbar cut, thereby effectively reducing the generation of burrs and flaking at the cut. This makes the cut section flatter, improves the dimensional accuracy of the soft copper busbar, and avoids the safety risks of partial discharge and poor contact caused by burrs in subsequent assembly, as well as connection loosening and overheating caused by dimensional deviation.

[0036] Understandably, when the blade 30 cuts the foil, the first blade 32 contacts the finished product, and the second blade 33 contacts the waste material after cutting.

[0037] Furthermore, the first included angle P formed between the first blade face 32 and the radial direction a of the roller body 10 is 5°, 5.5°, 6°, 6.5°, 7°, 7.5°, 8°, 8.5° or 9°, but is not limited to the listed values. Other values ​​within the range are also applicable.

[0038] In some embodiments, a second included angle T is formed between the second cutting face 33 and the radial direction a of the roller 10, satisfying the relationship: T≥P. By ensuring T≥P, it is effectively ensured that the angle of the second included angle is not less than the angle of the first included angle, making the cutting edge 30 relatively sharp on one side of the first cutting face 32 to ensure cutting efficiency; while the second cutting face 33 maintains sufficient cutting edge base thickness and strength through a larger angle. This effectively avoids the problem of the cutting edge being too fragile and prone to chipping due to the pursuit of extreme sharpness, and significantly improves the impact resistance and overall service life of the soft copper busbar cutting tool 100.

[0039] In some embodiments, a third included angle Y is formed between the first cutting edge 32 and the second cutting edge 33, satisfying the relationship: T+P=Y. By setting the third included angle, which is the sum of the first included angle and the second included angle, the overall structural strength and cutting sharpness of the cutting edge 30 are effectively ensured, so that the cutting edge 30 maintains sufficient structural strength to prevent chipping or excessive wear while possessing sharpness to achieve precision cutting.

[0040] In some embodiments, the first included angle P and the second included angle T satisfy the relationship: 7° ≤ T - P ≤ 11°. By setting the angle difference between the first included angle P and the second included angle T, this angle difference cannot be too large or too small. When the angle difference is too small, i.e., T - P < 7°, the angle of the third included angle Y is small, the cutting edge is too sharp and thin, the cutting edge rigidity is insufficient, the structural strength of the blade 30 is low, increasing the risk of blade 30 breakage, and drastically shortening the life of the soft copper busbar cutting tool 100. When the angle difference is too large, i.e., TP > 11°, the angle of the third included angle Y is large. Although this enhances the strength, the shearing action of the blade 30 is insufficient, and the material is prone to tearing. Therefore, setting 7° ≤ T - P ≤ 11° ensures that the blade 30 has sufficient cutting sharpness for efficient shearing, as well as structural strength to resist deformation and wear.

[0041] It is understood that T-P can be 7°, 7.5°, 8°, 8.5°, 9°, 9.5°, 10°, 10.5°, or 11°. However, it is not limited to the listed values; other values ​​within the range also apply.

[0042] In some embodiments, the second included angle T satisfies the relationship: 14°≤T≤18°. By setting the second included angle T such that 14°≤T≤18°, when the second cutting face 33 cuts into the material, the cutting force is not too concentrated due to the angle being too small, causing the cutting edge 30 to be subjected to excessive pressure and wear rapidly; nor is the cutting force dispersed due to the angle being too large, resulting in low cutting efficiency.

[0043] Furthermore, the second included angle T is 14°, 14.5°, 15°, 15.5°, 16°, 16.5°, 17°, 17.5° or 18°, but is not limited to the listed values; other values ​​within the range are also applicable.

[0044] In some embodiments, the width L of the transition surface 34 satisfies the relationship: 0.01mm ≤ L ≤ 0.02mm. The width of the transition surface 34 cannot be too large or too small. When the width of the transition surface 34 is too large, i.e., L > 0.02mm, the connection area between the first cutting face 32 and the second cutting face 33 becomes larger, the cutting edge radius increases, and it cannot quickly cut into the soft copper busbar during cutting, instead generating a strong squeezing effect. This leads to burrs, edge collapse, and local plastic deformation at the cut of the soft copper busbar, while increasing cutting resistance and aggravating the wear of the first cutting face 32 and the second cutting face 33. When the width of the transition surface 34 is too small, i.e., L < 0.01mm, the cutting edge will be excessively sharp, resulting in severely insufficient structural strength. During continuous cutting of soft copper busbars, even under small cutting reaction forces, damage such as edge chipping and curling is likely to occur, and small edge defects will rapidly amplify, causing the soft copper busbar cutting tool 100 to be scrapped within a short time, significantly increasing production tool replacement costs. Therefore, by setting 0.01mm≤L≤0.02mm, the structural strength of the blade 30 is effectively ensured, while also guaranteeing the sharpness of the blade edge and improving the durability and cutting stability of the blade 30.

[0045] In some embodiments, the transition surface 34 is a straight surface or a curved surface. When the transition surface 34 is a straight surface, it is easy to process and control, ensuring the consistency of the cutting edge shape of the soft copper busbar cutting tool 100 in mass production; when the transition surface 34 is a curved surface, the stress distribution is more uniform, and the material separation guidance effect during the cutting process is more gentle and continuous, which helps to further improve the smoothness of the cut edge. The appropriate choice can be made according to actual needs during use.

[0046] In some embodiments, the height H of the blade 30 satisfies the relationship: 1mm≤H≤2mm; and / or, the two ends of the roller body 10 are connected to roller shoulders 21 by roller shaft 20, and the height difference W between the roller shoulders 21 and the blade 30 satisfies the relationship: 0.01mm≤H≤0.15mm.

[0047] The height H of the cutting edge 30 must be set carefully; it cannot be too large or too small. If the height is too small (H < 1 mm), the cutting depth is insufficient, making it difficult to cut the foil in one pass, requiring secondary cutting and resulting in burrs on the cut surface. If the height is too large (H > 2 mm), the rigidity of the cutting edge decreases, causing the cutting edge to vibrate and tilt during cutting. Furthermore, excessive cutting depth can damage the bottom support film of the foil. Therefore, a height of 1 mm ≤ H ≤ 2 mm is necessary to ensure both the structural strength and the cutting depth of the cutting edge. By setting the height difference W between the roller shoulder 21 and the blade 30, the height difference W cannot be too large or too small. If the height difference W is too small, i.e., W < 0.01 mm, the roller shoulder 21 and the blade 30 are almost flush. During cutting, burrs or impurities on the edge of the soft copper busbar are likely to come into contact with both the roller shoulder 21 and the blade 30 simultaneously, leading to wear on the side of the blade edge. If the height difference W is too large, i.e., W > 0.15 mm, the height difference between the roller shoulder 21 and the blade 30 is too large. The edge of the soft copper busbar is likely to get stuck in the gap, causing edge compression and deformation. At the same time, the blade 30 loses the auxiliary support of the roller shoulder 21, and the blade edge is prone to wobble during cutting. Therefore, with a height difference of 0.01 mm ≤ H ≤ 0.15 mm, the roller shoulder 21 can both fit against the edge of the soft copper busbar and play a guiding role, without causing the soft copper busbar to warp due to the roller shoulder 21 being too high, or causing the copper busbar to shift laterally due to the roller shoulder 21 being too low and losing its limiting effect.

[0048] Furthermore, the height H of the cutting edge 30 is 1 mm, 1.1 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.8 mm, 1.9 mm, or 2 mm. The height difference W between the roller shoulder 21 and the cutting edge 30 is 0.01 mm, 0.12 mm, 0.13 mm, 0.14 mm, or 0.15 mm. However, these values ​​are not limited to the listed values; other values ​​within the range are also applicable.

[0049] In some embodiments, at least one blade group is provided on the outer periphery of the roller body 10, and each blade group includes multiple blades 30, which are spaced apart around the outer periphery of the roller body 10. By having multiple blades 30 spaced apart around the roller body 10, multiple cutting operations can be performed per revolution of the roller body 10, which shortens the idle reset time required by the soft copper busbar cutting tool 100 during cutting, and improves the cutting production efficiency and equipment utilization of soft copper busbars.

[0050] In some embodiments, multiple blade sets are provided, and the multiple blade sets are spaced apart along the central axis direction b of the roller body 10. By arranging multiple blade sets spaced apart along the central axis direction b of the roller body 10, the soft copper busbar cutting tool 100 can effectively cut copper foil of different widths, thereby improving the versatility and applicability of the soft copper busbar cutting tool 100.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A soft copper busbar cutting tool, characterized in that: The roller body (10) and roller shaft (20) are provided at both ends of the roller body (10). The outer periphery of the roller body (10) is provided with a blade (30). The blade (30) is arranged to form a cavity (31). The blade (30) includes a first blade surface (32), a second blade surface (33) and a transition surface (34). The first blade surface (32) is located on the side of the blade (30) facing the cavity (31). The second blade surface (33) is located on the side of the blade (30) away from the cavity (31). The transition surface (34) connects the first blade surface (32) and the second blade surface (33). The first blade surface (32) and the radial direction a of the roller body (10) form a first included angle P, which satisfies the relationship: 5°≤P≤9°.

2. The soft copper busbar cutting tool as described in claim 1, characterized in that: The second blade (33) forms a second included angle T with the radial direction (a) of the roller (10), satisfying the relationship: T≥P.

3. The soft copper busbar cutting tool as described in claim 2, characterized in that: The first cutting face (32) and the second cutting face (33) form a third included angle Y, satisfying the following relationship: T+P=Y.

4. The soft copper busbar cutting tool as described in claim 3, characterized in that: The first included angle P and the second included angle T satisfy the relationship: 7°≤T-P≤11°.

5. The soft copper busbar cutting tool as described in claim 2, characterized in that: The second included angle T satisfies the relationship: 14°≤T≤18°.

6. The soft copper busbar cutting tool as described in claim 1, characterized in that: The width L of the transition surface (34) satisfies the relationship: 0.01mm≤L≤0.02mm.

7. The soft copper busbar cutting tool as described in claim 1, characterized in that: The transition surface (34) is a straight surface or a circular arc surface.

8. The soft copper busbar cutting tool as described in claim 1, characterized in that: The height H of the blade (30) satisfies the following relationship: 1mm≤H≤2mm; And / or, the two ends of the roller body (10) are connected to roller shoulders (21) through the roller shaft (20), and the height difference W between the roller shoulder (21) and the blade (30) satisfies the relationship: 0.01mm≤H≤0.15mm.

9. The soft copper busbar cutting tool as described in claim 1, characterized in that: At least one set of blades (30) is provided on the outer periphery of the roller body (10), and each set of blades includes a plurality of blades (30), which are spaced apart around the outer periphery of the roller body (10).

10. The soft copper busbar cutting tool as described in claim 9, characterized in that: The blade assembly is provided in multiple ways, and the multiple blade assemblies are spaced apart along the central axis direction (b) of the roller body.

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