CN216141602U - Annular air knife device for tin plating of outer surface of segmented welding strip - Google Patents
Annular air knife device for tin plating of outer surface of segmented welding strip Download PDFInfo
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- CN216141602U CN216141602U CN202121647579.2U CN202121647579U CN216141602U CN 216141602 U CN216141602 U CN 216141602U CN 202121647579 U CN202121647579 U CN 202121647579U CN 216141602 U CN216141602 U CN 216141602U
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Abstract
The utility model discloses an annular air knife device for tin plating of the outer surface of a segmented welding strip, which comprises an upper pressing plate and a lower base which are arranged up and down, wherein the middle part of the upper pressing plate and the middle part of the lower base are respectively provided with a vertical upper pressing plate strip-shaped hole and a vertical lower base strip-shaped hole, and the upper pressing plate strip-shaped hole is aligned with the lower base strip-shaped hole; an annular gap with an air outlet facing the center of the strip-shaped hole of the upper pressing plate or the strip-shaped hole of the lower base is arranged between the lower surface of the upper pressing plate and the upper surface of the lower base; an air inlet pipe extending to the upper surface of the lower base is arranged on the side wall of the lower base. Compared with the prior art, the technical scheme of the utility model is that the upper pressing plate strip-shaped hole and the lower base strip-shaped hole form the annular air knife with the flat section, the flat section of the welding strip is used for tin plating by the air knife flat section, and the circular section of the welding strip is used for tin plating by the annular section. Thus, the tin plating uniformity of the flat section and the transition section of the flat section and the round section is ensured.
Description
Technical Field
The utility model relates to the field of photovoltaic welding strip production equipment, in particular to an annular air knife device for tin plating of the outer surface of a segmented welding strip.
Background
The main process of the production of the solder strip is that copper wires pass through a container filled with liquid tin metal, and then the excess tin liquid on the solder strip needs to be blown away quickly after the copper wires leave the liquid tin.
The sectional circular welding strip is formed by a section of fixed-length circular section and a section of fixed-length flat section in a circulating mode, and the circulating lengths are equal. When the sectional circular welding strip adopts annular gap tinning, the two-sided plating layers of the flat section are all in arc shapes. When the flat section is in contact welding with the battery piece, the contact part of the welding strip and the battery piece is observed from the front surface, the contact part is a point rather than a line, namely the actual contact is a line rather than the whole plane of the flat section, and the contact area of the welding strip and the battery piece is greatly reduced. When welding, welding false phenomena that welding strip contact points are welded with the battery plate and two sides of the contact points are not welded with the battery plate are easily generated. Therefore, stress points after welding are only concentrated on a line formed by welding contact points instead of a plane of the whole flat section, and the welding tension is far smaller than that during plane welding, so that a welding belt is easy to fall off from a battery piece, and the assembly efficiency is greatly reduced.
Therefore, how to solve the tin plating uniformity of the flat section of the segmented solder strip and the tin plating uniformity of the transition section of the flat section and the round section is a technical problem to be solved by the technical personnel in the field.
Disclosure of Invention
In order to solve the technical problems, the utility model mainly aims to provide the annular air knife device for tin plating of the outer surface of the segmented welding strip, which can increase the air output of the air knife, improve the production efficiency of the welding strip and reduce the impurity rate of a coating of the welding strip.
In order to achieve the above object, the present invention adopts the following technical solutions.
An annular air knife device for tin plating of the outer surface of a segmented welding strip comprises flat sections and circular sections which are periodically distributed, the annular air knife device comprises an upper pressing plate and a lower base which are arranged up and down, vertical upper pressing plate strip-shaped holes and vertical lower base strip-shaped holes are formed in the middle of the upper pressing plate and the middle of the lower base respectively, and the upper pressing plate strip-shaped holes and the lower base strip-shaped holes are collinear; an annular gap with an air outlet facing the center of the strip-shaped hole of the upper pressing plate or the strip-shaped hole of the lower base is arranged between the lower surface of the upper pressing plate and the upper surface of the lower base; the side wall of the lower base is provided with an air inlet pipe extending to the upper surface of the lower base; the upper pressing plate strip-shaped hole comprises two sections of opposite arc sections and two sections of parallel straight sections, the lower base strip-shaped hole comprises two sections of opposite arc sections and two sections of parallel straight sections, and the flat sections of the segmented welding strips are parallel to the straight sections.
Furthermore, the upper pressing plate is cylindrical, and the strip-shaped hole of the upper pressing plate is positioned in the center of the upper pressing plate; the lower base is cylindrical, and the lower base strip-shaped hole is aligned with the upper pressing plate strip-shaped hole.
Furthermore, the upper surface of lower base is provided with the flange of a round upwards extension, and the top board setting is in the top of lower base.
Further, the upper surface of lower base is provided with the toper portion that sinks of undercut, and the lower surface of top board is provided with the toper bulge that matches with the toper portion that sinks, forms annular gap between toper portion that sinks and the toper bulge.
Furthermore, the height of the annular gap is 0.2-0.25 mm.
Further, the cone vertex angles of the cone-shaped sunken part and the cone-shaped convex part are 90-135 degrees.
Further, the cone apex angle of the cone-shaped depressed portion and the cone-shaped protruding portion is 120 °.
Furthermore, the inner diameter of the arc sections of the upper pressing plate strip-shaped hole and the lower base strip-shaped hole is 3.5-4 mm.
Compared with the prior art, the technical scheme of the utility model is that the upper pressing plate strip-shaped hole and the lower base strip-shaped hole form the annular air knife with the flat section, the flat section of the welding strip is used for tin plating by the air knife flat section, and the circular section of the welding strip is used for tin plating by the annular section. Thus, the tin plating uniformity of the flat section and the transition section of the flat section and the round section is ensured. In addition, the utility model also has the following beneficial effects: 1. the air outlet gap is increased, the annular area of the whole air outlet gap is increased under the same air outlet pressure, the formed annular area of the air is increased, and the amount of air acting on the welding strip is increased, so that more liquid tin can be blown off. 2. Through increase bar hole size, make the solder strip pass through the air knife center the time and the distance grow between the air knife wall, just reduced the probability with the contact of air knife wall simultaneously, make the solder strip surface be difficult for carrying impurity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of a segmented solder strip;
FIG. 2 is a schematic view of an annular air knife assembly for tin plating the outer surface of a segmented solder strip in accordance with the present invention;
FIG. 3 is a top view of the flat section of the segmented weld bead as it passes through the annular air knife assembly;
FIG. 4 is a top view of the circular segment of the segmented weld bead as it passes through the annular air knife device;
FIG. 5 is a schematic cross-sectional view of the upper platen;
FIG. 6 is a cross-sectional view of the lower base;
in the above figures:
1, pressing a plate; 101, pressing a strip-shaped hole on an upper plate; 102 a conical projection; 2, a lower base; 201 lower base strip-shaped holes; 202 a flange; 203 a conical sunken part; 3, an annular gap; 4, air inlet pipe; 5, welding the strip in sections; 501, flat section; 502 flat section.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The utility model can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the utility model. Therefore, the present invention is not limited to the specific embodiments disclosed below.
The main process of the production of the solder strip is that copper wires pass through a container filled with liquid tin metal, and then the excess tin liquid on the solder strip needs to be blown away quickly after the copper wires leave the liquid tin.
Referring to fig. 1, the segmented solder strip 5 includes flat sections 501 and circular sections 502 distributed periodically.
Referring to fig. 2 to 6, an annular air knife device for tin plating of the outer surface of a segmented solder strip comprises an upper pressure plate 1 and a lower base 2 which are arranged up and down, wherein the middle part of the upper pressure plate 1 and the middle part of the lower base 2 are respectively provided with an upper vertical pressure plate strip-shaped hole 101 and a lower vertical base strip-shaped hole 201, and the upper vertical pressure plate strip-shaped hole 101 and the lower vertical base strip-shaped hole 201 are collinear; an annular gap 3 with an air outlet facing the center of the strip-shaped hole 101 of the upper pressing plate or the strip-shaped hole 201 of the lower base is arranged between the lower surface of the upper pressing plate 1 and the upper surface of the lower base 2; the side wall of the lower base 2 is provided with an air inlet pipe 4 extending to the upper surface of the lower base 2; go up pressure lath shape hole 101 and contain two sections relative arcwall sections and two sections parallel straight sections, lower base bar shape hole 201 contains two sections relative arcwall sections and two sections parallel straight sections, the flat section 501 of segmentation solder strip 5 with the straight section is parallel.
Because the transition section is changed from round to flat or flat to round, in order to ensure the tin plating uniformity of the transition section, the flat section 501 of the segmented solder strip 5 needs to be plated with tin by a straight air knife, and the round section 502 needs to be plated with tin by an arc air knife. Practice proves that by adopting the annular gap of the strip-shaped hole, the flat section 501 of the welding strip is used for tinning the flat section, and the circular section is used for tinning the annular section, so that the tinning uniformity of the transition section is solved.
Further, the upper pressing plate 1 is cylindrical, and the upper pressing plate strip-shaped hole 101 is located in the center of the upper pressing plate 1; the lower base 2 is cylindrical, and the lower base strip-shaped hole 201 is aligned with the upper pressing strip-shaped hole 101. The upper surface of the lower base 2 is provided with a ring of flanges 202 extending upwards, and the upper pressure plate 1 is arranged above the lower base 2. An air cavity is formed by the lower surface of the upper pressure plate 1, the flange 201 and the upper surface of the lower base 2, an annular gap 3 is formed by an outlet of the air cavity, and air entering the air cavity from the air inlet pipe 4 can only be blown out from the annular gap 3.
Further, the upper surface of lower base 2 is provided with the toper portion 203 that sinks of undercut, the lower surface of top board is provided with the toper bulge 102 that matches with toper portion 203 that sinks, form between toper portion 203 that sinks and the toper bulge 102 annular gap 3.
Further, the height of the annular gap 3 is 0.2-0.25 mm.
In the above embodiment, during operation, compressed air is introduced into the intake pipe 4. The solder strip production equipment is started, the solder strip is led out from the lower base strip-shaped hole 201 and the upper pressing strip-shaped hole 101 from the tin liquid pool upwards through the reel, and when the solder strip passes through the annular gap 3, the redundant tin liquid on the surface of the solder strip is blown away. Because the height of the annular gap 3 is 0.2-0.25mm, the tin carrying amount of the copper wire after the copper wire passes through the liquid tin is in direct proportion to the speed, the tin carrying amount of the copper wire is increased along with the increase of the production speed, and the production speed of the welding strip can be obviously increased by increasing the air outlet amount. Experiments show that when the air outlet gap of the annular gap is controlled to be 0.2-0.25mm, the production speed of a single welding strip machine can be improved by 10-15%.
Further, referring to fig. 5 and 6, the cone vertex angle of the cone-shaped depressed portion 203 and the cone-shaped protruding portion 102 is 90 ° to 135 °. Preferably, the cone apex angle of the conical depression 203 and the conical projection 102 is 120 °.
In the above embodiments, it is preferable that the tin-plated layer on the surface of the solder strip has a uniform thickness and a high surface quality when the cone vertex angle of the cone-shaped depressed portion 203 and the cone-shaped protruding portion 102 is 120 ° through experiments.
Further, the inner diameter of the arc sections of the upper batten-shaped hole 101 and the lower base batten-shaped hole 201 is 3.5-4 mm.
In the above embodiments, tests have shown that when the inner diameters of the arc sections of the upper strip-pressing strip-shaped hole 101 and the lower base are 3.5-4mm, the probability of the welding strip contacting the channel wall when passing through the upper strip-pressing strip-shaped hole 101 and the lower base strip-shaped hole 201 is greatly reduced, and the impurity rate of the coating is reduced from 8% per kilogram to 4% per kilogram.
Compared with the prior art, the technical scheme of the utility model is that the upper pressing plate strip-shaped hole and the lower base strip-shaped hole form an annular air knife with a flat section, the flat section 501 of the welding strip is plated with tin by the flat section of the air knife, and the circular section 502 of the welding strip is plated with tin by the annular section. This ensures uniform tin plating of the flat 501 and transition between the flat 501 and round 502 sections.
In addition, the utility model also has the following beneficial effects: 1. the air outlet gap is increased, the annular area of the whole air outlet gap is increased under the same air outlet pressure, the formed annular area of the air is increased, and the amount of air acting on the welding strip is increased, so that more liquid tin can be blown off. 2. Through increase bar hole size, make the solder strip pass through the air knife center the time and the distance grow between the air knife wall, just reduced the probability with the contact of air knife wall simultaneously, make the solder strip surface be difficult for carrying impurity.
Although the present invention has been described in detail in this specification with reference to specific embodiments and illustrative embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Accordingly, such modifications and improvements are intended to be within the scope of this invention as claimed.
Claims (8)
1. The utility model provides an annular air knife device for segmentation solder strip surface tin-plating, segmentation solder strip (5) contain and are flat section (501) and circle segment (502) of periodic distribution, its characterized in that, including top board (1) and lower base (2) that set up from top to bottom, the middle part of top board (1) and the middle part of lower base (2) are provided with vertical top board bar hole (101) and lower base bar hole (201) respectively, and top board bar hole (101) and lower base bar hole (201) align; an annular gap (3) with an air outlet facing the center of the strip-shaped hole (101) of the upper pressing plate or the strip-shaped hole (201) of the lower base is arranged between the lower surface of the upper pressing plate (1) and the upper surface of the lower base (2); an air inlet pipe (4) extending to the upper surface of the lower base (2) is arranged on the side wall of the lower base (2); the upper pressing plate strip-shaped hole (101) comprises two sections of opposite arc-shaped sections and two sections of parallel straight sections, the lower base strip-shaped hole (201) comprises two sections of opposite arc-shaped sections and two sections of parallel straight sections, and the flat sections (501) of the segmented welding strips (5) are parallel to the straight sections.
2. The annular air knife device for tin plating of the outer surface of the segmented solder strip according to claim 1, characterized in that the upper pressure plate (1) is cylindrical, and the upper pressure plate strip-shaped hole (101) is located at the center of the upper pressure plate (1); lower base (2) are cylindrical, lower base bar hole (201) with top board bar hole (101) align.
3. The annular air knife device for tin plating of the outer surface of a segmented solder strip according to claim 2, characterized in that the upper surface of the lower base (2) is provided with a ring of upwardly extending flanges (202), the upper pressure plate (1) being arranged above the lower base (2).
4. The annular air knife device for tin plating of the outer surface of the segmented solder strip according to claim 3, characterized in that the upper surface of the lower base (2) is provided with a downward-depressed conical depression (203), the lower surface of the upper press plate is provided with a conical projection (102) matching with the conical depression (203), and the annular gap (3) is formed between the conical depression (203) and the conical projection (102).
5. The annular air knife device for tin plating of the outer surface of a segmented solder strip according to claim 4, characterized in that the height of the annular gap (3) is 0.2-0.25 mm.
6. The annular air knife device for tin plating of the outer surface of a segmented solder strip according to claim 5, characterized in that the conical vertex angle of the conical sunken part (203) and the conical bulge part (102) is 90 ° -135 °.
7. The annular air knife device for tin plating of the outer surface of a segmented solder strip according to claim 6, characterized in that the conical vertex angle of the conical depression (203) and the conical projection (102) is 120 °.
8. The annular air knife device for tin plating of the outer surface of the segmented solder strip according to claim 1, wherein the inner diameter of the circular arc sections of the upper pressing plate strip-shaped hole (101) and the lower base strip-shaped hole (201) is 3.5-4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121647579.2U CN216141602U (en) | 2021-07-20 | 2021-07-20 | Annular air knife device for tin plating of outer surface of segmented welding strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121647579.2U CN216141602U (en) | 2021-07-20 | 2021-07-20 | Annular air knife device for tin plating of outer surface of segmented welding strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216141602U true CN216141602U (en) | 2022-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121647579.2U Active CN216141602U (en) | 2021-07-20 | 2021-07-20 | Annular air knife device for tin plating of outer surface of segmented welding strip |
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| CN (1) | CN216141602U (en) |
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2021
- 2021-07-20 CN CN202121647579.2U patent/CN216141602U/en active Active
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