Combined tinning die for solder strip production

Abstract

The utility model relates to a combined tinning die for solder strip production, which comprises a base body and an upper cover matched with the base body, a plurality of polycrystalline strips are arranged in an inner cavity of the base body, the number of the polycrystalline strips is larger than or equal to 3, the polycrystalline strips are sequentially connected to define a tinning hole, the front end of the previous polycrystalline strip is in contact with the front portion of the next adjacent polycrystalline strip, and the upper cover is matched with the base body. The tinning die is small in tinning hole machining difficulty, adjustable in tinning hole size, suitable for tinning of copper strips of different sizes, easy to detach when the tinning holes are blocked, easy to clean, convenient to maintain and stable and reliable in the tinning process, production efficiency is improved, and meanwhile cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of solder strip production equipment, in particular to a combined tin plating die for solder strip production. Background Art

[0002] In recent years, the photovoltaic industry has developed rapidly, and new product types have emerged continuously. The ultimate goal of various technical trends is to further improve the power and power generation capacity of components, maximize the product efficiency, and enable customers to obtain investment returns in the shortest time.

[0003] For the MBB (multi-busbar) technology, there seems to be no clear definition in the industry as to the exact number of main busbars. Currently, various types from 7BB, 9BB to 12BB, 18BB can all be called MBB, and round solder strips are mostly used. At the same time, the diameter of the round solder strip has been decreasing from 0.4mm to 0.35mm, 0.30mm, 0.28mm, to 0.26mm, and there is a trend of getting smaller, and the production of micro-fine copper wires has attracted more and more attention. At present, tin plating of solder strips mostly adopts direct output from a copper wire tin furnace. After the copper wire is self-tin-coated, it is then blown and cooled to form. In this process, the positioning point of the wire is the wire outlet of the turning plate, which is far from the tin furnace surface. The wire is prone to jitter at the tin output surface position, resulting in the wire not being in the center position of the cold air, and it is easy to cause eccentricity of the tin plating layer. There are also some that use a wire drawing die for tin plating. Generally, the wire drawing die consists of two parts. One part is the base body, which is made of titanium alloy material or stainless steel material; the other part is the polycrystal embedded in the base body, and the required wire drawing aperture is made in the center of the polycrystal. When the die manufacturer makes the wire drawing die, after laser drilling, wire cutting and grinding are carried out, the minimum diameter of the cut wire is 0.20mm. It is relatively difficult to process a micro-fine wire with a diameter of 0.15mm. When the die hole is broken or blocked by foreign objects during the use of this kind of die, it is difficult to clean. Moreover, the existing die generally has a center hole with a fixed size, corresponding to a copper wire with a certain shape and size. Dies need to be replaced for different diameters, and when the wear is excessive, they can only be discarded. Summary of the Utility Model

[0004] Aiming at the problems existing in the prior art, the utility model provides a combined tin plating die for solder strip production and its use method. When the copper strip is tin-plated using this die, the tin plating process is stable. The tin plating holes of this die are easy to process, the size of the tin plating holes is adjustable, it is suitable for tin plating of copper strips with different sizes, it is easy to repair when blocked, and it is easy to disassemble, maintain and reuse when worn, reducing the cost expenditure.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A combined tin plating die for solder strip production, comprising a base body and an upper cover cooperating therewith. A plurality of polycrystalline bars are arranged in the inner cavity of the base body. The number of the polycrystalline bars is ≥3. The polycrystalline bars are sequentially connected to form a tin plating hole. The front end of the previous polycrystalline bar contacts the front part of the adjacent next polycrystalline bar.

[0007] Preferably, an internal gear ring is further arranged in the base body. The internal gear ring is rotationally connected to the tail of a rotating arm through a gear. The front part of the rotating arm is inserted into the tail of the polycrystalline bar.

[0008] Preferably, a groove is arranged on the inner bottom wall of the base body. The internal gear ring is embedded in the groove. A locking device for fixing the internal gear ring is arranged on the side wall of the base body.

[0009] Preferably, a positioning column penetrates through the gear up and down and is fixedly connected to the gear. A cylindrical groove with internal teeth on the side wall is opened at the lower end of the tail of the rotating arm. The lower end of the positioning column is rotationally connected to the bottom wall of the base body, and the upper end penetrates out of the tail of the rotating arm. The lower part of the gear meshes with the internal gear ring, and the upper part meshes with the internal teeth of the cylindrical groove.

[0010] Preferably, a connecting groove is opened on the side wall of the front part of the rotating arm. The polycrystalline bar is inserted into the front part of the rotating arm through the connecting groove.

[0011] Preferably, the tin plating hole comprises an incoming wire and tin feeding area, a sizing area and an outlet area. The upper end of the sizing area is communicated with the outlet area, and the lower end is communicated with the incoming wire and tin feeding area.

[0012] Preferably, both the incoming wire and tin feeding area and the outlet area are trumpet-shaped, and the sizing area is a regular prism-shaped.

[0013] Preferably, the number of the polycrystalline bars is 6.

[0014] Preferably, the polycrystalline bar comprises a first side surface, a second side surface, a third side surface, a fourth side surface, a fifth side surface and a sixth side surface. The second side surface is opposite to the sixth side surface. One end of the second side surface and the sixth side surface is connected through the first side surface. The fourth side surface is located between the other ends of the second side surface and the sixth side surface. The second side surface and the fourth side surface are connected through the third side surface. The third side surface is a chamfered surface. The fourth side surface and the sixth side surface are connected through the fifth side surface. One end of the fifth side surface far away from the fourth side surface inclines towards the first side surface. The front part of the first side surface is arc-shaped and extends to the front ends of the third side surface, the fourth side surface and the fifth side surface. The front end of the first side surface of the next polycrystalline bar contacts the front part of the fourth side surface of the next polycrystalline bar.

[0015] Based on the usage method of the above-mentioned combined tin plating die for solder strip production, when adjusting the size of the tin plating hole:

[0016] S1. Open the upper cover and loosen the polycrystalline bar;

[0017] S2. Insert the spline, adjust the position of the polycrystalline strip so that each side wall of the sizing area of the tin plating hole is tangent to the spline;

[0018] S3. Lock the polycrystalline strip and take out the spline;

[0019] S4. Install the upper cover.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] (1) The processing of the present utility model is simple and has a wide application range. The tin plating holes are surrounded by a number of polycrystalline strips connected in sequence. When the diameter of the produced solder strip changes and the size of the tin plating hole needs to be adjusted, only the polycrystalline strip needs to be rotated. It is applicable to polycrystalline strips of various sizes, without the need to replace the mold, which is convenient and fast and has a low cost;

[0022] (2) An internal gear ring is provided in the cavity of the base body of the present utility model. The polycrystalline strip is inserted into the front part of the rotating arm, and the tail of the rotating arm is rotatably connected to the internal gear ring through a gear. When the die hole is blocked, only the internal gear ring needs to be loosened, and the rotation of the internal gear ring can drive the polycrystalline strip to rotate, thus facilitating cleaning.

[0023] (3) When a polycrystalline strip of the present utility model is damaged, only the internal gear ring needs to be loosened and rotated, and at the same time, the damaged polycrystalline strip on the rotating arm is loosened, and a new polycrystalline strip is replaced, which is convenient for maintenance, can significantly reduce the maintenance difficulty and improve the maintenance efficiency. At the same time, structures such as the base body and the rotating arm do not need to be replaced, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0025] Figure 2 is a top view of the tin plating mold of the present utility model;

[0026] Figure 3 is a schematic diagram of the die hole structure of the present utility model;

[0027] Figure 4 is a schematic cross-sectional view of the die hole of the present utility model;

[0028] Figure 5 is a schematic diagram of the rotating arm structure of the present utility model;

[0029] Figure 6 is a schematic diagram of the front end structure of the polycrystalline strip;

[0030] Figure 7 is a schematic diagram of the tail structure of the polycrystalline strip;

[0031] Figure 8 is a schematic diagram of the structure of the present utility model with 4 polycrystalline strips;

[0032] Figure 9Schematic diagram of the structure of the polycrystalline strip with the number of 5 in the present utility model;

[0033] Reference numerals: 1, substrate; 2, upper cover; 3, polycrystalline strip; 301, first side; 302, second side; 303, third side; 304, fourth side; 305, fifth side; 306, sixth side; 4, tin plating hole; 401, wire inlet and tin feeding area; 402, sizing area; 403, outlet area; 5, internal gear ring; 6, gear; 7, rotating arm; 701, cylindrical groove; 702, connecting groove; 8, positioning post. Specific implementation mode

[0034] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] Reference Figure 1 、 Figure 8 and Figure 9 , this embodiment provides a combined tin plating die for solder strip production, including a substrate 1 and an upper cover 2 cooperating with it. A plurality of polycrystalline strips 3 are arranged at intervals along the circumference in the inner cavity of the substrate 1. The number of the polycrystalline strips 3 is ≥3. The polycrystalline strips 3 are sequentially connected to enclose a tin plating hole 4. The front end of the previous polycrystalline strip 3 contacts the front part of the adjacent next polycrystalline strip 3. The tin plating hole 4 includes a wire inlet and tin feeding area 401, a sizing area 402 and an outlet area 403. The upper end of the sizing area 402 is communicated with the outlet area 403, and the lower end is communicated with the wire inlet and tin feeding area 401. The wire inlet and tin feeding area 401 and the outlet area 403 are preferably in a horn shape, and the sizing area 402 is preferably in a regular prism shape. The sizing area 402 is preferably coaxial with the substrate 1.

[0036] In this embodiment, the tin-plated holes 4 are surrounded by polycrystalline strips 3 in sequence, and the processing is simple. During the production process, the whole die rotates around the central axis of the sizing zone. The sizing zone 402, the base body 1 and the welding strip are concentric. During the rotation process, the sizing zone 402 can size the welding strip without causing eccentricity of the welding strip. When the diameter of the produced welding strip changes, only need to open the upper cover 2, loosen the fixed polycrystalline strip 3, insert a sample strip into the tin-plated hole 4, synchronously change the contact position between the previous polycrystalline strip 3 and the adjacent next polycrystalline strip 3, so that each side wall of the sizing zone 402 of the tin-plated hole 4 is tangent to the sample strip, then the diameter of the welding strip that the tin-plated hole 4 can produce can be changed. After adjusting the position of the polycrystalline strip 3, lock and fix the polycrystalline strip 3, and install the upper cover 2. There is no need to replace the whole die. When the polycrystalline strip 3 is worn, only need to replace the polycrystalline strip 3, and there is no need to replace the whole die. Replace the worn polycrystalline strip 3, which is convenient for maintenance and low in cost. When the tin-plated hole 4 is blocked, follow the same steps as adjusting the size of the tin-plated hole 4 to quickly clean the tin-plated hole 4. After cleaning, adjust the tin-plated hole 4 with the sample strip and install it.

[0037] Reference Figure 1 and Figure 5 Preferably, an internal gear ring 5 concentric with the base body 1 is further arranged in the base body 1. The internal gear ring 5 is rotationally connected to the tail of the rotating arm 7 through a gear 6. A positioning column 8 penetrates through the gear 5 up and down and is fixedly connected to the gear 5. A cylindrical groove 701 with internal teeth on the side wall is opened at the lower end of the tail of the rotating arm 7. The lower end of the positioning column 8 is rotationally connected to the bottom wall of the base body 1, and the upper end passes through the tail of the rotating arm 7. The lower part of the gear 6 meshes with the internal gear ring 5, and the upper part meshes with the internal teeth of the cylindrical groove 701, and the upper end surface of the cylindrical groove 701 is stuck on the upper end surface of the gear 6. The front part of the rotating arm 7 is inserted into the tail of the polycrystalline strip 3. The rotating arm 7 and the polycrystalline strip 3 are both fixed by a locking device. The locking device is preferably a locking screw. The locking screw penetrates through the side wall of the base body to fix the internal gear ring 5. The rotating arm 7 and the polycrystalline strip 3 are also fixed by a locking screw.

[0038] In this embodiment, when the size of the produced welding strip changes, loosen the locking screw for fixing the internal gear ring 5 and the locking screw for fixing the polycrystalline strip 3, insert a sample strip, and simultaneously adjust the positions of all the polycrystalline strips 3 so that each side wall of the sizing zone 402 of the tin-plated hole 4 is tangent to the sample strip. When adjusting the position of one of the polycrystalline strips 3, the rotating arm 7 connected to the polycrystalline strip 3 drives the internal gear ring 5 to rotate through the gear 6, and the internal gear ring 5 drives all the rotating arms 7 to rotate simultaneously to ensure that the sizing zone 402 is a regular polygonal prism. After the position of the polycrystalline strip 3 is adjusted, lock the locking screw for fixing the polycrystalline strip 3 and lock the locking screw for fixing the internal gear ring 6, and then the size adjustment of the tin-plated hole 4 is completed.

[0039] Preferably, a groove is provided on the inner bottom wall of the matrix 1, and the internal gear ring 5 is embedded in the groove and can rotate relative to the groove to prevent the central axis of the sizing area 402 from shifting during the locking process of the internal gear ring 5.

[0040] Reference Figure 1 and Figure 5 Preferably, a connecting groove 702 is formed on the front side wall of the rotating arm 7, the bottom of the connecting groove 702 is arc-shaped, and the polycrystalline strip 3 is inserted into the front part of the rotating arm 7 through the connecting groove 702.

[0041] In this embodiment, the bottom of the connecting groove 702 on the rotating arm 7 is arc-shaped and becomes narrower closer to the sizing area 402, which can ensure that the adjustment of the position of the polycrystalline strip 3 is not affected.

[0042] Reference Figure 1 、 Figure 6 and Figure 7 Preferably, the polycrystalline strip 3 includes a first side surface 301, a second side surface 302, a third side surface 303, a fourth side surface 304, a fifth side surface 305, and a sixth side surface 306. The second side surface 302 is opposite to the sixth side surface 306. One end of the second side surface 302 and the sixth side surface 306 is connected by the first side surface 301. The fourth side surface 304 is located between the other ends of the second side surface 302 and the sixth side surface 306. The second side surface 302 and the fourth side surface 304 are connected by the third side surface 303. The third side surface 303 is a chamfered surface. The fourth side surface 304 and the sixth side surface 306 are connected by the fifth side surface 305. The side of the fifth side surface 305 away from the fourth side surface 304 is inclined towards the first side surface 301. The front part of the first side surface 301 is arc-shaped and extends to the front ends of the third side surface 303, the fourth side surface 304, and the fifth side surface 305. The front end of the first side surface 301 of the previous polycrystalline strip 3 contacts the front part of the fourth side surface 304 of the next polycrystalline strip 3.

[0043] In this embodiment, the third side surface 303 is a chamfered surface, and the side of the fifth side surface 305 away from the fourth side surface 304 is inclined towards the first side surface 301. In this way, the tin plating hole 4 formed by the polycrystalline strip 3 and the sizing area 402 are regular prismatic, and both the wire inlet tin plating area 301 and the outlet area 303 are trumpet-shaped. The tin plating amount of the solder strip is not affected in both the wire inlet tin plating area 401 and the outlet area 403. By setting the front end of the first side surface 301 as arc-shaped, when adjusting the position of the polycrystalline strip 3, the friction force is small, which is convenient for changing the position of the polycrystalline strip 3 and can extend the service life of the polycrystalline strip 3.

[0044] Reference Figure 8 and Figure 9 In the above embodiments, the number of polycrystalline strips ≥ 3 is acceptable, and it can be 3 strips, 4 strips, 5 strips, 6 strips or more.

[0045] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed.

Claims

1. A combined tinning mold for producing solder strips, characterized in that: It comprises a base (1) and an upper cover (2) matched therewith, wherein a plurality of polycrystalline bars (3) are arranged in the inner cavity of the base, the number of the polycrystalline bars (3) being ≥3, the polycrystalline bars (3) being connected in sequence to form a tin-plated hole (4), and the front end of a preceding polycrystalline bar (3) is in contact with the front end of a succeeding adjacent polycrystalline bar (3); An inner gear ring (5) is arranged in the base body (1), and the inner gear ring (5) is rotatably connected to the rear end of a rotating arm (7) via a gear (6), and the front end of the rotating arm (7) is plugged into the rear end of the polycrystalline bar (3).

2. The combined tinning mold for producing solder strips according to claim 1, characterized in that: The inner bottom wall of the base body (1) is provided with a groove, the inner gear ring (5) is embedded in the groove, and the side wall of the base body (1) is provided with a locking device for fixing the inner gear ring (5).

3. The combined tinning mold for producing solder strip according to claim 1, characterized in that: The positioning column (8) passes through the gear (6) from top to bottom and is fixedly connected to the gear (6); a cylindrical groove (701) with internal teeth on the side wall is provided at the lower end of the tail of the rotating arm (7); the lower end of the positioning column (8) is rotatably connected to the bottom wall of the base (1); the upper end passes through the tail of the rotating arm (7); the lower part of the gear (6) is meshed with the inner gear ring (5), and the upper part is meshed with the internal teeth of the cylindrical groove (701).

4. The combined tinning mold for producing solder strip according to claim 1, characterized in that: A connection groove (702) is provided on the front side wall of the rotating arm (7), and the polycrystalline bar (3) is plugged into the front of the rotating arm (7) through the connection groove (702).

5. The combined tinning mold for producing solder strip according to claim 1, characterized in that: The tinning hole (4) comprises a wire inlet tinning area (401), a sizing area (402) and an outlet area (403); the sizing area (402) is connected at its upper end to the outlet area (403) and at its lower end to the wire inlet tinning area (401).

6. The combined tinning mold for producing solder strip according to claim 5, characterized in that: The wire inlet and tin inlet area (401) and the outlet area (403) are both trumpet-shaped, and the sizing area (402) is a regular prism-shaped.

7. The combined tinning mold for producing solder strip according to claim 1, characterized in that: The number of the polycrystalline bars (3) is 6.

8. The combined tinning mold for producing solder strip according to claim 1, characterized in that: The polycrystalline bar (3) comprises a first side surface (301), a second side surface (302), a third side surface (303), a fourth side surface (304), a fifth side surface (305) and a sixth side surface (306), wherein the second side surface (302) is opposite to the sixth side surface (306), one end of the second side surface (302) and the sixth side surface (306) are connected via the first side surface (301), the fourth side surface (304) is located between the second side surface (302) and the other end of the sixth side surface (306), and the second side surface (302) and the fourth side surface (304) are connected via the third side surface (304). The first side surface (301) and the second side surface (303) are connected, the third side surface (303) is a chamfered surface, the fourth side surface (304) and the sixth side surface (306) are connected through the fifth side surface (305), the end of the fifth side surface (305) away from the fourth side surface is inclined toward the first side surface (301), the front part of the first side surface (301) is arc-shaped and extends to the front ends of the third side surface (303), the fourth side surface (304) and the fifth side surface (305), and the front end of the first side surface (301) of the next polycrystalline bar (3) contacts the front part of the fourth side surface (304) of the next polycrystalline bar (3).

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