CN219541989U - Torque welding head and welding equipment - Google Patents
Torque welding head and welding equipment Download PDFInfo
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- CN219541989U CN219541989U CN202320390441.1U CN202320390441U CN219541989U CN 219541989 U CN219541989 U CN 219541989U CN 202320390441 U CN202320390441 U CN 202320390441U CN 219541989 U CN219541989 U CN 219541989U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to a torque welding head and welding equipment. The torque welding head includes: a welding head body; the first welding spot is arranged at the center of the end part of the welding head body; the welding parts are arranged at the end part of the welding head body in a concentric circle mode by taking the first welding spots as circle centers, each welding part comprises a plurality of second welding spots, wherein the protruding height of the first welding spot is larger than that of any second welding spot, and the protruding heights of the second welding spots are sequentially reduced along the radius direction of the welding head body. In the torque welding head, the protrusion height of the first welding spot is larger than that of any second welding spot, the protrusion heights of the second welding spots are sequentially reduced along the radial direction of the welding head body, the welding depths of the welding spots are sequentially reduced from inside to outside, the damage degree to welding materials can be reduced, and the welding quality is improved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a torque welding head and welding equipment.
Background
The positive pole and the positive pole current collecting disc of part of large-size cylindrical batteries are made of aluminum materials, and the thickness of the positive pole is far greater than that of the positive pole current collecting disc. The traditional resistance welding and laser welding have certain limitations, so that the welding process requirements of the battery are difficult to meet. In the welding process, the ultrasonic welding has no current passing through the welded workpiece in a resistance welding mode, does not need to melt the base metal with higher energy like laser welding, has no influence of problems of heat conduction, resistivity and the like, can effectively weld nonferrous metal foils and sheets with different thicknesses, and particularly has more obvious welding advantages on the welding quality of aluminum and copper foils.
Ultrasonic welding is classified into linear welding and torque welding. The welding head of linear welding is in high-frequency linear motion in one direction, more welding energy is needed, the welding part is easy to damage, and the welding strength is directional. Under the action of the transducer and the amplitude transformer, the torque welding head can perform high-frequency micro circumferential motion along the axis of the welding head, the welding has no specific directivity, and the damage to welding materials can be reduced. However, in the ultrasonic torque welding process, the welding head performs high-frequency circular reciprocating motion along the axis of the welding head, the amplitude of the welding head gradually increases from inside to outside along the radial direction, the welding strength of each point also sequentially increases, the welding marks of the outermost ring are overlapped, and the damage to welding materials is increased.
Disclosure of Invention
Based on the problems, the utility model provides a torque welding head and welding equipment, so as to reduce damage to welding materials and improve welding quality.
One embodiment of the present utility model provides a torque welding head comprising: a welding head body; the first welding spot is arranged at the center of the end part of the welding head body; and the welding parts are arranged at the end part of the welding head body in a concentric circle mode by taking the first welding spots as circle centers, each welding part comprises a plurality of second welding spots, wherein the protrusion height of the first welding spots is larger than the protrusion height of any second welding spots, and the protrusion heights of the second welding spots are sequentially reduced along the radial direction of the welding head body. The welding depth of the welding spots is reduced from inside to outside in sequence, the splashing amount in the welding process is reduced, and the welding quality is improved.
According to some embodiments of the utility model, the second weld spot has the same end surface area within the same weld. The area of the welding marks correspondingly generated by the second welding spots in the same welding part is the same, so that the welding quality is improved.
According to some embodiments of the utility model, the first and second welding spots are cylindrical or frustoconical. The cylindrical or round table-shaped welding spots are convenient to manufacture, and the manufacturing cost of the torque welding head is reduced.
According to some embodiments of the present utility model, the radial intervals between any two adjacent welding portions are the same, so that the welding marks are more uniformly distributed on the welding material, the welding quality is improved, and fine welding is realized.
According to some embodiments of the utility model, the end surface area of any of the second pads is the same as the end surface area of the first pad. The end surface areas of all welding spots are the same, so that mass production of the welding spots is facilitated, and the production efficiency of the torque welding heads is improved.
According to some embodiments of the utility model, the end surface area of the first weld spot is larger than the end surface area of any of the second weld spots, and the end surface areas of the second weld spots decrease in sequence along the radial direction of the weld head body. The end surface area of the first welding spot is the largest, the end surface area of each welding spot is sequentially reduced from inside to outside along the radial direction of the welding head body, the welding strength of each welding spot can be homogenized, and the damage to welding materials in the welding process is reduced.
According to some embodiments of the utility model, the solder mark area generated by any of the second solder joints and the first solder joint is the same. The linear speed is increased from inside to outside, and the end surface area of each welding spot is controlled to be reduced from inside to outside, so that the welding area generated by each welding spot is the same.
According to some embodiments of the utility model, the second welding spots are arranged at intervals in the same welding part.
According to some embodiments of the utility model, the second welding spots in each welding part are uniformly distributed along the circumferential direction, so that the welding marks generated by the second welding spots are distributed at equal intervals. And a spacing area is formed between adjacent welding marks generated in each welding part, so that the damage degree to welding materials can be reduced, the splashing amount in the welding process is reduced, and the welding quality is improved.
One embodiment of the present utility model provides a welding apparatus comprising a torque welding head as described above. The transducer and the amplitude transformer of the welding equipment can drive the welding head to rotate so as to weld the welding materials.
According to the torque welding head, the welding spots are arranged in the form of concentric circles, the protruding height of the first welding spot is larger than that of any second welding spot, the protruding height of the second welding spot is sequentially reduced along the radial direction of the welding head body, the welding depth of the welding spots is sequentially reduced from inside to outside, the splashing amount in the welding process is reduced, and the welding quality is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings by a person skilled in the art without departing from the scope of the present utility model as claimed.
FIG. 1 is a schematic diagram of a prior art ultrasonic torque welding apparatus;
FIG. 2 is a schematic view of a weld spot of a prior art weld head;
FIG. 3 is a schematic illustration of a prior art bonding tool;
FIG. 4 is a schematic illustration of a torque welding head according to an embodiment of the present utility model;
FIG. 5 is a top view of a first torque welding head according to an embodiment of the present utility model;
FIG. 6 is a partial cross-sectional view of a first torque welding head according to an embodiment of the utility model;
FIG. 7 is a top view of a second torque welding head according to an embodiment of the present utility model;
FIG. 8 is a schematic illustration of a second torque welding head according to an embodiment of the present utility model;
FIG. 9 is a schematic illustration of a third torque welding head according to an embodiment of the present utility model;
fig. 10 is a schematic view of a welding apparatus for welding cylindrical batteries according to an embodiment of the present utility model.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Fig. 1 is a schematic view of a conventional ultrasonic torque welding apparatus. As shown in fig. 1, the existing ultrasonic torque welding apparatus includes a transducer 1', a horn 2', and a horn 3'. The transducer 1 'comprises a first transducer and a second transducer arranged in pairs, the transducer 1' being adapted to convert a low frequency current into high frequency electromagnetic energy. The horn 2 'is connected to the horn 3', and the converted high frequency electromagnetic energy is communicated to the horn 3 'by the horn 2'. The horn 3' transfers the received vibrational energy to the joint of the workpieces to be welded. In the welding area, the vibration energy is converted into heat energy by a friction method, and the weldment is melted to finish welding.
In ultrasonic torque welding, the welding head 3' can form high-frequency tiny reciprocating circumferential rotation around the axis of the welding head under the action of the transducer 1' and the amplitude transformer 2 '.
Fig. 2 is a schematic view of a weld spot of a prior art welding head, and fig. 3 is a schematic view of a weld mark of a prior art welding head. As shown in fig. 2 and 3, the welding head 3' has a plurality of circles of welding spots 31' at its end, all of which welding spots 31' have the same shape and size, and the welding spots 31' leave a welding mark 311' on the surface of the welding material during the welding process. Because the welding head can do reciprocating circular motion around the axis of the welding head in the torque welding process, the welding head has a certain torsion angle theta in the welding process, so that the rest welding marks outside the central welding mark are in a waist shape.
When the welding head 3 'rotates, the linear speed increases from inside to outside, and the area of the welding mark 311' of each welding spot increases along the radial direction of the welding head. The blank area between adjacent welding marks of each circle is gradually reduced from inside to outside, a certain overlapping area exists in the welding marks 311 'formed by the adjacent welding spots 31' of the outermost circle, the splashing amount and burrs generated in the welding process are increased, and the damage to welding materials is serious.
Fig. 4 is a schematic view of a torque welding head according to an embodiment of the present utility model, and fig. 5 is a top view of a first torque welding head according to an embodiment of the present utility model. As shown in fig. 4 and 5, an embodiment of the present utility model provides a torque welding horn 100 (simply called a horn) that can be used for ultrasonic torque welding. Bonding tool 100 includes a bonding tool body 1, a first bonding site 2, and a plurality of bonding sites 3. The whole welding head body 1 is of a ladder type structure. The first welding spot 2 and the plurality of welding portions 3 are located at the end of the welding head body 1. The first welding spot 2 is provided at a center position of an end portion of the welding head body 1. The plurality of welding parts 3 are arranged in concentric circles with the first welding point 2 as a center. Each welding part 3 comprises a plurality of second welding spots 31, and the number of the second welding spots 31 contained in each welding part 3 sequentially increases from inside to outside.
Fig. 6 is a partial cross-sectional view of a first torque welding head according to an embodiment of the utility model. As shown in fig. 6, in this embodiment, the bump height of the first solder joint 2 is larger than the bump height of any second solder joint 31, and the bump heights of the second solder joints 31 decrease sequentially from inside to outside along the radial direction of the soldering head body 1. The bump height of each welding spot is set according to the requirement.
During welding, the welding depth of each welding spot is sequentially reduced from inside to outside along the radial direction of the welding head body 1, so that the welding strength is met, meanwhile, the damage to welding materials in the welding process and the splashing amount in the welding are reduced, and the welding quality is improved.
In some embodiments, the end surface areas of the second welding spots 31 are the same in the same welding part 3, so that the areas of the welding marks correspondingly generated by the second welding spots 31 in the same welding part 3 are the same, and the uniformity of welding mark distribution is improved, so as to improve welding quality.
In some embodiments, the first weld spot 2 and the second weld spot 31 are both cylindrical or frustoconical. The cylindrical or frustoconical weld spot facilitates manufacturing and facilitates reducing a manufacturing cost of bonding tool 100.
In some embodiments, the intervals between any two adjacent welding parts 3 are the same along the radial direction of the welding head body 1, so that the welding marks are uniformly distributed on the welding material, the welding quality is improved, and fine welding is realized. Alternatively, the interval between the first welding spot 2 and the innermost ring welding portion is equal to the interval between any adjacent two welding portions 3.
In some embodiments, the end surface area of any second weld spot 31 is the same as the end surface area of the first weld spot 2. For example, all welding spots are cylindrical welding spots with the same size, so that mass production of the welding spots is facilitated, and the production efficiency of the welding head 100 is improved.
Fig. 7 is a top view of a second torque welding head according to an embodiment of the utility model. As shown in fig. 7, in some embodiments, the end surface area of the first welding spot 2 is larger than the end surface area of any second welding spot 31, and the end surface areas of the second welding spots 31 decrease sequentially from inside to outside in the radial direction of the welding head body 1. For example, the end faces of the first welding spot 2 and the second welding spot are both circular, the end face diameter of the first welding spot 2 is 0.70mm, the end face diameter of the second welding spot 31a of the first welding portion is 0.55mm from inside to outside, the end face diameter of the second welding spot 31b of the second welding portion is 0.40mm, and the end face diameter of the second welding spot 31c of the third welding portion is 0.25mm. The end surface area of the second welding spot 31 is sequentially reduced from inside to outside, so that the welding strength of each welding spot can be homogenized, and the damage to welding materials in the welding process is reduced.
Fig. 8 is a schematic diagram of a second torque welding head according to an embodiment of the present utility model. As shown in fig. 8, the arbitrary second pad 31 and the first pad 2 have the same solder mark area. The circumferential linear speed is sequentially increased from inside to outside along the radial direction of the welding head, and the welding area generated by each welding spot can be the same by controlling the end surface area of each welding spot to be sequentially reduced from inside to outside.
For example, the radius r0 of the first weld spot 2 is larger than the radius r1 of the second weld spot 31a of the first weld, the radius r1 of the second weld spot 31a of the first weld is larger than the radius r2 of the second weld spot 31b of the second weld, and the radius r2 of the second weld spot 31b of the second weld is larger than the radius r3 of the second weld spot 31c of the third weld. The welding marks have different shapes and the same area, so that the uniformity of the welding marks is ensured, the welding quality is ensured, and the loss of welding materials is reduced.
The welding areas generated by the welding spots of each layer are the same, and the radius relation between the second welding spot radius and the first welding spot 2 of each welding part is as follows:
the solder area of the first solder joint 2:
the welding area of the second welding spot 31a of the first welding portion: s is S 1 ＝πr 1 2 +4πl 1 r 1 θ/360；
The welding area of the second welding spot 31b of the second welding portion: s is S 2 ＝πr 2 2 +4πl 2 r 2 θ/360；
The welding area of the second welding spot 31c of the third welding portion: s is S 3 ＝πr 3 2 +4πl 3 r 3 θ/360；
Wherein r0 is the radius of the first welding spot 2, and r 1-r 3 are the radii of the second welding spots from inside to outside; l (L) 0 ～l 3 Is the distance from the center of each layer of welding spots to the center of the welding head from inside to outside, wherein l is 0 =0; and theta is the torsion angle of the welding head in the torque welding process.
The welding area generated by each layer of welding spots is the same, namely, the following conditions are satisfied: s is S 0 ＝S 1 ＝S 2 ＝S 3 To obtain
Fig. 9 is a schematic view of a third torque welding head according to an embodiment of the present utility model. As shown in fig. 9, in some embodiments, the solder marks 32 generated by the second solder joint 31 are distributed at intervals in the same solder joint 3. The solder marks 32 generated by the second solder joint 31 in the same solder part 3 are not overlapped, so that a spacing area 33 is formed. The spacing region 33 refers to a region where there is no overlap between adjacent solder marks 32 in the annular region where the solder marks 32 are located.
The adjacent welding marks 32 generated by the second welding spots 31 in the same welding part 3 are not overlapped, so that the splashing amount generated in the welding process can be reduced, the generation of burrs is reduced, the damage to welding materials is reduced, and the welding quality is improved.
Alternatively, the number of second weld spots 31 in each weld 3 may be reduced relative to conventional torque welding heads while ensuring weld quality. By reducing the number of second welds 31 in each weld 3, the adjacent welds 32 created by the second welds 31 in the same weld 3 may be misaligned, thereby reducing the extent of damage to the weld material. Referring to fig. 9, the number of second welding spots 31 in the welded portion is n, taking the outermost welded portion as an example,
the whole area of the annular area where the welding part of the outermost ring is positioned: s=4pi lr;
the outermost ring area of the area corresponding to the central angle alpha: s is S α ＝4πlr/n；
The welding area formed by the second welding spot 31 of the outermost ring welding part: s is S d ＝πr 2 +4πlrθ/360；
The inventors have found that the following relationship is satisfied for both weld strength and reduced damage to the weld material:
S d +πr 2 ≤S α ≤S d +2πr 2 the method comprises the following steps:
2πr 2 +4πlrθ/360≤4πlr/n≤3πr 2 +4πlrθ/360；
it follows that the number of second welding spots 31 in one welding portion 3 satisfies:
wherein: n is the number of second welding spots in the welding part; l is the distance from the center of the first welding spot to the center of the second welding spot; r is the radius of the second welding spot; and theta is the torsion angle of the welding head in the torque welding process.
Alternatively, the welded parts 3 are arranged in at least three. Taking three welding parts 3 as an example, the number of the second welding spots in the first welding part is 4 to 6 from inside to outside, the number of the second welding spots in the second welding part is 10 to 12, and the number of the second welding spots in the third welding part is 16 to 18. Too few second welding spots 31 in each welding part 3 can result in too small total welding area on the welding material, and the welding quality is affected. The excessive number of the second welding spots 31 in each welding part 3 can cause the adjacent welding marks 32 of the outer ring to have mutually overlapped areas, so that the splashing amount and burrs generated in the welding process are increased, and the welding materials are not good.
For example, the number of the second welding spots in the first welding part is 5, the number of the second welding spots in the second welding part is 11, and the number of the second welding spots in the third welding part is 17.
In some embodiments, the second welding spots 31 in each welding portion 3 are uniformly distributed along the circumferential direction, so that the welding marks 32 generated by the second welding spots 31 in the same welding portion 3 are distributed at equal intervals, which improves the stress uniformity of the welding material and is beneficial to prolonging the service life of the welding material.
Fig. 10 is a schematic view of a welding apparatus for welding cylindrical batteries according to an embodiment of the present utility model. As shown in fig. 10, the ultrasonic torque welding apparatus includes a transducer 210, a horn 220, and a horn 100 as described above, the transducer 210 and the horn 220 being capable of rotating the horn 100 to weld the welding material.
The positive pole 310 and the positive current collecting plate 320 of the large-size cylindrical battery 300 are made of aluminum, the thickness of the positive pole 310 is generally 1-4 mm, and is far greater than 0.1-0.4 mm of the positive current collecting plate 320, and the welding requirement of the cylindrical battery 300 can be met by adopting ultrasonic torque welding. During welding, welding head 100 is inserted into middle through hole 330 of cylindrical battery 300, welding spot 2 of welding head 100 acts on positive electrode current collecting plate 320, and welding of positive electrode column 310 and positive electrode current collecting plate 320 is completed under the pressure of ultrasonic torque welding equipment.
The torque welding head reduces the damage degree of the torque welding head to welding materials, reduces the splashing amount in the welding process, ensures the welding quality and realizes the fine welding under the condition of ensuring the welding strength.
The above description of the embodiments of the present utility model is provided in detail. The principles and embodiments of the present utility model have been described herein with reference to specific examples, which are provided to facilitate understanding of the technical solution of the present utility model and the core ideas thereof. Therefore, those skilled in the art will appreciate that many changes and modifications can be made in the specific embodiments and applications of the utility model based on the spirit and scope of the utility model. In view of the foregoing, this description should not be construed as limiting the utility model.
Claims (10)
1. A torque welding head, comprising:
a welding head body;
the first welding spot is arranged at the center of the end part of the welding head body;
and the welding parts are arranged at the end part of the welding head body in a concentric circle mode by taking the first welding spots as circle centers, each welding part comprises a plurality of second welding spots, wherein the protrusion height of the first welding spots is larger than the protrusion height of any second welding spots, and the protrusion heights of the second welding spots are sequentially reduced along the radial direction of the welding head body.
2. The torque welding head of claim 1 wherein the second weld spot has the same end surface area within the same weld.
3. The torque welding head of claim 1 wherein said first weld spot and said second weld spot are cylindrical or frustoconical.
4. The torque welding head of claim 1 wherein the radial spacing between any adjacent two of said welds is the same.
5. The torque welding head of claim 1 wherein the face area of any of said second weld spots is the same as the face area of said first weld spot.
6. The torque welding head according to claim 1, wherein an end surface area of the first welding spot is larger than an end surface area of any of the second welding spots, and the end surface areas of the second welding spots decrease in order along a radial direction of the welding head body.
7. The torque welding head of claim 6 wherein any of said second weld points and said first weld points produce the same weld area.
8. The torque welding head according to any one of claims 5 to 7 wherein said second welds produce welds in spaced apart relationship within the same weld.
9. The torque welding head of claim 8 wherein said second weld points in each of said weld sections are uniformly circumferentially distributed such that the corresponding generated weld marks of said second weld points are equally spaced.
10. A welding apparatus comprising a torque welding head as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320390441.1U CN219541989U (en) | 2023-03-03 | 2023-03-03 | Torque welding head and welding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320390441.1U CN219541989U (en) | 2023-03-03 | 2023-03-03 | Torque welding head and welding equipment |
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| Publication Number | Publication Date |
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| CN219541989U true CN219541989U (en) | 2023-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320390441.1U Active CN219541989U (en) | 2023-03-03 | 2023-03-03 | Torque welding head and welding equipment |
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| Country | Link |
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| CN (1) | CN219541989U (en) |
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- 2023-03-03 CN CN202320390441.1U patent/CN219541989U/en active Active
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