Cutter for cylindrical battery shell channeling
By introducing arc-shaped transitioned shaping parts and limiting parts into the columnar battery case hob, the problem of uneven groove wall thickness is solved, the stability and consistency of groove size is achieved, the coating is prevented from cracking, and the coating is improved Quality of the roller groove.
Patent Information
- Application Number
- CN202323511866.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-21
AI Technical Summary
The stretched portion between the blade and the side of the existing columnar battery case hob has a long size, resulting in uneven thickness of the groove wall, which is prone to rupture, affecting the stability and consistency of the groove size.
A cylindrical battery case groove tool is designed, including a base body part, a stretched portion protruding outward, a cutting edge part formed at the end of the stretched portion, and an arc-shaped transition provided between the base body part and the stretched portion. The shaping part is truncated by the blade part, the stretching part feeds and the shaping part to push the upper and lower edges to avoid partial overstretching, forming an R angle to prevent cracking of the plating layer, and prevent longitudinal expansion and deformation through the limiting part.
It effectively avoids the problem of unqualified groove wall thickness, ensures the stability and consistency of groove size, prevents cracking of the coating, and improves the quality of the groove.
Smart Images
Figure CN222175523U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a tool used for producing columnar batteries, in particular to a tool for rolling grooves of columnar battery shells. Background Art
[0002] With the continuous development of electric vehicle technology and the increasing demand for electric vehicles, the demand for batteries is also increasing, providing a huge market for the development of battery manufacturers.
[0003] Among them, in the production process of batteries, it is necessary to roll grooves at set positions of the cylindrical battery shell (for example, the side wall of the cylindrical battery shell adjacent to its top), so the use of a rolling cutter is indispensable.
[0004] For example, in Figure 1 The roller cutter 300 shown includes a base portion 310, a stretching portion 320 horizontally protruding outward from a side portion 311 of the base portion 310, and a blade portion 330 formed at the end of the stretching portion 320. Therefore, during the groove forming process, the upper die and the lower die jointly clamp the cylindrical battery shell and drive the cylindrical battery shell to rotate at high speed. At the same time, the roller cutter 300 feeds along the radial direction of the cylindrical battery shell and rolls the groove on the cylindrical battery shell according to the adjusted size, so that the groove is formed at the set position of the cylindrical battery shell.
[0005] However, in Figure 1 In the roller cutter 300 shown, the stretching portion 320 between the blade portion 330 and the side portion 311 is relatively long, making the roller cutter 300 a flat blade structure. After rolling the groove of the cylindrical battery shell, the wall thickness of the groove portion is stretched unevenly, which is prone to cracking; the outer diameter expands after rolling the groove, affecting the stability and consistency of the groove size.
[0006] Therefore, a tool for rolling grooves in a cylindrical battery shell is provided to overcome one or more of the above-mentioned defects. Utility Model Content
[0007] The utility model aims to provide a tool for rolling grooves of a columnar battery shell, which can avoid the problem that the columnar battery shell is easily broken due to uneven groove wall thickness.
[0008] To achieve the above purpose, the cylindrical battery shell groove rolling tool of the utility model comprises a base part, a stretching part protruding outward from the side of the base part, a blade part formed at the end of the stretching part, and a shaping part provided between the side of the base part and the stretching part. The shaping part transitions in an arc shape from the stretching part to the side of the base part.
[0009] Compared with the prior art, since a shaping part is provided between the side of the base part and the stretching part, and the shaping part transitions in an arc shape from the stretching part to the side of the base part, during the groove forming process, the blade part performs groove cutting, the stretching part performs feeding and stretching, and the shaping part pushes the upper and lower edges of the groove toward the groove stretching area to avoid local excessive stretching of the groove resulting in unqualified wall thickness. At the same time, a certain R angle is formed on the upper and lower edges of the groove to prevent cracking of the coating, thereby ensuring the stability and consistency of the groove size.
[0010] Preferably, the tool for rolling grooves of a cylindrical battery shell of the utility model further includes a limiting portion connected between the side portion of the base portion and the shaping portion, and the limiting portion extends along the up-and-down direction of the base portion.
[0011] Preferably, the outer contours of the blade portion, the stretching portion, the shaping portion and the limiting portion projected along the base portion from top to bottom are each in the shape of a circle or an arc with the centers coinciding.
[0012] Preferably, the base portion has a vertical line projected along the base portion from top to bottom to form the center of the circle, and the outer contours of the blade portion, the stretching portion, the shaping portion and the limiting portion intercepted by the plane passing through the vertical line are respectively a first circular arc, a horizontal straight line segment, a second circular arc and a vertical straight line segment.
[0013] Preferably, the horizontal straight line segment is tangent to the first circular arc and the second circular arc respectively.
[0014] Preferably, the vertical straight line segment is tangent to the second circular arc.
[0015] Preferably, the center angle occupied by the first arc is 180 degrees, and the center angle occupied by the second arc is 90 degrees.
[0016] Preferably, the radius of the first circular arc is smaller than the radius of the second circular arc.
[0017] Preferably, the blade portion, the stretching portion, the shaping portion, the limiting portion and the base portion are each a rotating structure centered on a vertical line of the base portion.
[0018] Preferably, the base portion is provided with a through hole which passes through the base portion from top to bottom, and the vertical line is located at the center of the through hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a plan view of the existing hob.
[0020] Figure 2 It is a plan view of a tool for rolling grooves in a cylindrical battery shell according to the first embodiment of the utility model.
[0021] Figure 3 yes Figure 2 Plan view projected along the direction indicated by arrow A.
[0022] Figure 4 is along Figure 3 Internal view cut along the midline BB.
[0023] Figure 5 It shows Figure 2 A plan view of the cylindrical battery case groove rolling tool feeding action into the cylindrical battery case is shown.
[0024] Figure 6 1 is a plan view showing a cylindrical battery case after groove rolling.
[0025] Figure 7 It is a plan view of a tool for rolling grooves in a cylindrical battery shell according to a second embodiment of the utility model.
[0026] Figure 8 yes Figure 7 Internal view cut along line EE. DETAILED DESCRIPTION
[0027] Embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals represent like elements.
[0028] See also Figure 2 and Figure 3 The cylindrical battery shell groove rolling tool 100 of the first embodiment includes a base portion 10, a stretching portion 20, a blade portion 30, a shaping portion 40 and a limiting portion 50. The stretching portion 20 protrudes outward from the side portion 11 of the base portion 10 to play a feeding and stretching role. The blade portion 30 is formed at the end of the stretching portion 20 to play a grooving role. The shaping portion 40 is arranged between the side portion 11 of the base portion 10 and the stretching portion 20. The shaping portion 40 transitions from the stretching portion 20 to the side portion 11 of the base portion 10 in an arc shape, so that the upper and lower edges 211 (see Figure 6 ) is pushed toward the rolling groove stretching area to avoid local over-stretching of the rolling groove 210 resulting in unqualified wall thickness, and at the same time, the upper and lower edges 211 of the rolling groove 210 form a certain R angle to prevent the coating from cracking. The limiting portion 50 is connected between the side portion 11 of the base portion 10 and the shaping portion 40. The limiting portion 50 extends along the up and down direction of the base portion 10 (see the direction indicated by arrow A and the opposite direction), so as to prevent the cylindrical battery shell 200 from expanding and deforming under the longitudinal extrusion (also the direction indicated by arrow A and the opposite direction) with the help of the limiting portion 50. It should be noted that although Figures 2 to 4 The cylindrical battery shell groove rolling tool 100 of the first embodiment includes a base portion 10, a stretching portion 20, a blade portion 30, a shaping portion 40 and a limiting portion 50. Of course, the limiting portion 50 can be deleted according to actual needs, so it is not used as Figures 2 to 4More specifically, as follows:
[0029] like Figure 3 As shown, the outer contours 21 (31, 41, 51) of the stretching portion 20, the blade portion 30, the shaping portion 40 and the limiting portion 50 projected along the direction from top to bottom of the base portion 10 (i.e., the direction indicated by arrow A) are each circles with the center C coinciding, so that the stretching portion 20, the blade portion 30, the shaping portion 40 and the limiting portion 50 are each a rotating body structure centered on the vertical line 12 projected to form the center C. This design facilitates the cylindrical battery shell grooving tool 100 of the first embodiment to rotate during the process of forming the groove 210, thereby improving the smoothness and reliability of the cylindrical battery shell grooving tool 100 of the first embodiment in rolling the cylindrical battery shell 200 into a groove. Specifically, at Figure 4 As an example, the base portion 10 has a vertical line 12 projected along the base portion 10 from top to bottom to form a center C. The outer contours of the stretching portion 20, the blade portion 30, the shaping portion 40 and the limiting portion 50 intercepted by the plane passing through the vertical line 12 are a horizontal straight line segment 22, a first circular arc 32, a second circular arc 42 and a vertical straight line segment 52, respectively. This design can further avoid excessive local stretching of the rolling groove 210 resulting in unqualified wall thickness, and at the same time, the upper and lower edges of the rolling groove 210 form a circular R angle to prevent cracking of the coating. At the same time, it further prevents the cylindrical battery shell 200 from expanding and deforming under the action of longitudinal extrusion. More specifically, at Figure 4 As an example, the horizontal straight line segment 22 is tangent to the first arc 32 and the second arc 42, respectively, and the vertical straight line segment 52 is tangent to the second arc 42. This design makes the stretching portion 20 transition more smoothly with the blade portion 30 and the shaping portion 40, respectively, and makes the shaping portion 40 transition more smoothly with the limiting portion 50, effectively avoiding stress concentration, thereby further improving the quality of the rolling groove 210. For example, in Figure 4 In the figure, the center angle occupied by the first arc 32 is 180 degrees, the center angle occupied by the second arc 42 is 90 degrees, and the radius of the first arc 32 is smaller than the radius of the second arc 42. The purpose of this design is to meet the need for the horizontal straight line segment 22 to be tangent to the first arc 32 and the second arc 42 respectively, and the need for the vertical straight line segment 52 to be tangent to the second arc 42. It should be noted that since the stretching portion 20, the blade portion 30, the shaping portion 40 and the limiting portion 50 are each a rotating body structure centered on the vertical line 12 projected to form the center of the circle C, correspondingly, the base portion 10 is also made into a rotating body structure centered on the vertical line 12, so as to facilitate the manufacturing and processing of the cylindrical battery shell grooving tool 100 of the first embodiment; in addition, in order to facilitate the assembly operation between the cylindrical battery shell grooving tool 100 of the first embodiment and the external support, such as Figures 2 to 4As shown, as an example, the base portion 10 is provided with a through hole 13 penetrating the base portion 10 from top to bottom. At this time, the vertical line 12 is located at the center of the through hole 13 .
[0030] Combination Figures 2 to 6 The working process of the cylindrical battery shell rolling groove tool 100 of the first embodiment on the cylindrical battery shell is described as follows: first, the cylindrical battery shell 200 is placed between the upper mold and the lower mold outside, and the upper mold and the lower mold jointly clamp the cylindrical battery shell 200 and drive the cylindrical battery shell 200 to rotate. The rotation direction is visible but not limited to Figure 5 At the same time, the cylindrical battery shell groove rolling tool 100 of the first embodiment is fed in the direction indicated by the arrow D, and the cylindrical battery shell groove rolling tool 100 of the first embodiment is rotated during the feeding process, and the rotation direction is visible but not limited to Figure 5 Therefore, when the blade portion 30 contacts the cylindrical battery shell 200, the blade portion 30 slots the cylindrical battery shell 200, the stretching portion 20 feeds and stretches, the shaping portion 40 pushes the upper and lower edges 211 of the rolling groove 210 toward the rolling groove stretching area, and the limiting portion 40 prevents the cylindrical battery shell 200 from expanding and deforming under the longitudinal extrusion, thereby obtaining Figure 6 The cylindrical battery case 200 is shown with the groove 210 completed.
[0031] See also Figure 7 and Figure 8 , shows a second embodiment of a tool 100' for rolling grooves in a cylindrical battery shell, including a base portion 10', a stretching portion 20', a blade portion 30', a shaping portion 40' and a limiting portion 50'. The stretching portion 20' protrudes outward from the side portion 11' of the base portion 10', and plays a role in feeding and stretching. The blade portion 30' is formed at the end of the stretching portion 20', and plays a role in grooving. The shaping portion 40' is arranged between the side portion 11' of the base portion 10' and the stretching portion 20', and the shaping portion 40' transitions in an arc shape from the stretching portion 20' to the side portion 11' of the base portion 10', so as to use the shaping portion 40' to roll the upper and lower edges 211 (see Figure 6 ) is pushed toward the rolling groove stretching area to avoid local over-stretching of the rolling groove 210 resulting in unqualified wall thickness, and at the same time, the upper and lower edges 211 of the rolling groove 210 form a certain R angle to prevent the coating from cracking. The limiting portion 50' is connected between the side portion 11' of the base portion 10' and the shaping portion 40', and the limiting portion 50' extends along the up and down directions of the base portion 10' (see the direction indicated by arrow A and the opposite direction), so as to prevent the cylindrical battery shell 200 from expanding and deforming under the longitudinal extrusion (also the direction indicated by arrow A and the opposite direction) with the help of the limiting portion 50'. It should be noted that although Figure 7The second embodiment of the cylindrical battery shell groove rolling tool 100 'is shown, which includes a base portion 10 ', a stretching portion 20 ', a blade portion 30 ', a shaping portion 40 ' and a limiting portion 50 '. Of course, the limiting portion 50 'can be deleted according to actual needs, so it is not used as Figure 7 More specifically, as follows:
[0032] like Figure 7 As shown, the outer contours 21' (31', 41', 51') of the stretching portion 20', the blade portion 30', the shaping portion 40' and the limiting portion 50' projected along the direction from top to bottom of the base portion 10' (i.e., the direction indicated by arrow A) are all arc-shaped with the center C coinciding, so that the cylindrical battery shell groove rolling tool 100' of the second embodiment is not a rotating body structure, so the cylindrical battery shell groove rolling tool 100' of the second embodiment does not rotate during the feeding process. Specifically, Figure 8 As an example, the base portion 10' has a vertical line 12' projected along the base portion 10' from top to bottom to form a center C, and the outer contours of the stretching portion 20', the blade portion 30', the shaping portion 40' and the limiting portion 50' cut by the plane passing through the vertical line 12' are a horizontal straight line segment 22', a first circular arc 32', a second circular arc 42' and a vertical straight line segment 52', respectively. This design can further avoid excessive local stretching of the rolling groove 210 resulting in unqualified wall thickness, and at the same time, the upper and lower edges 211 of the rolling groove 210 form a circular R angle to prevent cracking of the coating, and at the same time, further prevent the cylindrical battery shell 200 from expanding and deforming under the action of longitudinal extrusion. More specifically, in Figure 8 As an example, the horizontal straight line segment 22' is tangent to the first arc 32' and the second arc 42', and the vertical straight line segment 52' is tangent to the second arc 42'. This design makes the stretching portion 20' and the blade portion 30' and the shaping portion 40' transition more smoothly, and makes the shaping portion 40' and the limiting portion 50' transition more smoothly, effectively avoiding stress concentration, thereby further improving the quality of the rolling groove 210. For example, in Figure 8 In the figure, the center angle occupied by the first arc 32' is 180 degrees, the center angle occupied by the second arc 42' is 90 degrees, and the radius of the first arc 32' is smaller than the radius of the second arc 4'2. The purpose of this design is to meet the need for the horizontal straight line segment 22' to be tangent to the first arc 32' and the second arc 42' respectively, and the need for the vertical straight line segment 52' to be tangent to the second arc 42'.
[0033] Compared with the prior art, since a shaping portion 40 (40`) is provided between the side portion 11 (11`) of the base portion 10 (10`) and the stretching portion 20 (20`), and the shaping portion 40 (40`) transitions in an arc shape from the stretching portion 20 (20`) to the side portion 11 (11`) of the base portion 10 (10`), during the forming process of the groove 200, the blade portion 30 (30`) performs groove cutting, the stretching portion 20 (20`) performs feeding and stretching, and the shaping portion 40 (40`) pushes the upper and lower edges 211 of the groove 210 toward the groove stretching area to avoid local over-stretching of the groove 210 resulting in unqualified wall thickness, and at the same time, the upper and lower edges 211 of the groove 210 form a certain R angle to prevent cracking of the coating, thereby ensuring the stability and consistency of the size of the groove 210.
[0034] It is additionally noted that the direction indicated by the arrow A in the drawings is the direction from top to bottom of the base portion 10 ( 10 ′).
[0035] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.
Claims
1. A tool for rolling grooves of a cylindrical battery shell, comprising a base portion, a stretching portion protruding outward from a side portion of the base portion, and a blade portion formed at a distal end of the stretching portion, It is characterized in that The tool for rolling grooves of a cylindrical battery shell also includes a shaping portion arranged between the side of the base portion and the stretching portion, and the shaping portion transitions in an arc shape from the stretching portion to the side of the base portion.
2. The tool for rolling grooves of a cylindrical battery shell according to claim 1, It is characterized in that It also includes a limiting portion connected between the side portion of the base portion and the shaping portion, and the limiting portion extends along the up and down directions of the base portion.
3. The tool for rolling grooves of a cylindrical battery shell according to claim 2, It is characterized in that The outer contours of the blade portion, the stretching portion, the shaping portion and the limiting portion projected from top to bottom along the base portion are each in the shape of a circle or an arc with the centers coinciding.
4. The tool for rolling grooves of a cylindrical battery case according to claim 3, It is characterized in that The base portion has a vertical line projected along the base portion from top to bottom to form the center of the circle, and the outer contours of the blade portion, the stretching portion, the shaping portion and the limiting portion intercepted by the plane passing through the vertical line are respectively a first circular arc, a horizontal straight line segment, a second circular arc and a vertical straight line segment.
5. The tool for rolling grooves of a cylindrical battery case according to claim 4, It is characterized in that The horizontal straight line segments are tangent to the first circular arc and the second circular arc respectively.
6. The tool for rolling grooves of a cylindrical battery case according to claim 4, It is characterized in that The vertical straight line segment is tangent to the second circular arc.
7. The tool for rolling grooves in a cylindrical battery case according to claim 4, It is characterized in that The center angle of the first arc is 180 degrees, and the center angle of the second arc is 90 degrees.
8. The tool for rolling grooves of a cylindrical battery case according to claim 4, It is characterized in that The radius of the first circular arc is smaller than the radius of the second circular arc.
9. The tool for rolling grooves in a cylindrical battery case according to claim 4, It is characterized in that The blade portion, the stretching portion, the shaping portion, the limiting portion and the base portion are each a rotating body structure with the vertical line of the base portion as the center.
10. The tool for rolling grooves of a cylindrical battery case according to claim 9, It is characterized in that The base portion is provided with a through hole which passes through the base portion from top to bottom, and the vertical line is located at the center of the through hole.