Automatic tinning device for fuse link

Abstract

An automatic tinning device for fuse links is characterized in that each fuse link is concavely provided with at least one tin filling groove in the width direction, the fuse links continuously form a material belt in the front-back direction in the length direction, and the automatic tinning device comprises a tin feeding assembly, a heating block and a first air cylinder assembly; the heating block is fixed to the top of the first air cylinder assembly and driven by the first air cylinder assembly to move up and down. The tin feeding assembly comprises a tin outlet pipe, a tubular tin bar is fed out through the tin outlet pipe, the material belt is driven at the front end of the tin outlet pipe, and the tin bar fed out through the tin outlet pipe falls into the tin filling groove; the heating block is provided with a positioning groove, the tin filling groove can be embedded into the positioning groove, the heating block which moves upwards abuts against the lower portion of the fuse link, the tin filling groove is embedded into the positioning groove to be heated after the heating block moves upwards, and tin bars in the tin filling groove are filled in the tin filling groove after being heated. According to the utility model, automatic tinning of the fuse link can be realized, the structure is simple, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to fuse fusible element processing equipment, and more specifically to an automatic tinning device for fuse elements. Background Technology

[0002] A fuse is an electrical device that breaks the circuit by melting a fuse element when the current exceeds a specified value. Fuses are widely used in high and low voltage power distribution systems, control systems, and electrical equipment as short-circuit and overcurrent protectors, and are one of the most commonly used circuit protection devices.

[0003] The fuse element is the core of a fuse, serving to cut off the current when it melts. The production of fuse elements involves cutting copper strips of different sizes according to different fuse specifications, stamping the cut copper strips into the required shapes, soldering tin bars onto the ends of the copper strips, and finally inspecting the product's appearance and placing it in a storage fixture. Because tin is a low-melting-point metal, and the fuse element is usually made of copper, when the fuse element is overloaded, the temperature rises. The tin surrounding the copper melts first, and the copper and tin interpenetrate to form a copper-tin alloy with a lower melting point, causing the fuse element to melt at a lower temperature at that point (the tin-filled groove).

[0004] In existing technologies, soldering on fuse elements is generally done manually. To facilitate the application of solder bars, at least one solder-filling groove can be recessed along the width of the strip-shaped fuse element, and solder is filled into the groove. Therefore, during fuse production, soldering operations need to be performed on the fuse element itself or in the solder-filling groove. Since the soldering operation is generally done manually, manual production is labor-intensive, inefficient, and results in inconsistent product quality control. In some automated melt processing equipment, the soldering device has a complex structure, a complex solder conveying structure, and many coordination steps (multiple transfer steps), resulting in poor operational smoothness. Furthermore, during the soldering process, solder on the molten metal is prone to overflow, easily leading to defective products. Utility Model Content

[0005] The purpose of this invention is to provide an automatic tinning device for fuses, which can realize the automatic tinning of fuses, and has a simple structure, thereby improving production efficiency.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] An automatic tinning device for fuses includes at least one tin-filling groove recessed in the width direction of each fuse and a continuous strip of material formed in the length direction of each fuse. The automatic tinning device includes a tin feeding assembly, a heating block, and a first cylinder assembly. The heating block is fixed to the top of the first cylinder assembly and is driven by the first cylinder assembly to move up and down. The tin feeding assembly includes a tin outlet tube through which a strip of tin is fed out. The strip of material is driven at the front end of the tin outlet tube and falls into the tin-filling groove. The heating block has a positioning groove into which the tin-filling groove can be embedded. After the heating block moves upward, it abuts against the bottom of the fuse, and the tin-filling groove is heated after being embedded in the positioning groove. The tin in the tin-filling groove is filled after being heated.

[0008] Furthermore, both the tin-filling groove and the positioning groove on the heating block are U-shaped grooves with a U-shaped cross-section.

[0009] Furthermore, the length of the solder bar is less than or equal to the length of the solder-filling groove.

[0010] Furthermore, a channel is formed in the middle of the solder tube for the solder bars to pass through. The front end of the channel is directly behind the solder filling groove of the fuse after the transmission stops. The solder bars are pushed out one by one from the rear end of the channel.

[0011] Furthermore, the solder feeding assembly also includes a first adjusting block, a second adjusting block, and a second cylinder assembly. The solder tube can slide into the first slot of the first adjusting block and then be fixed. A connecting shaft protrudes from the outside of the first adjusting block and passes through the second slot of the second adjusting block. The connecting shaft rotates in the second slot and is then fixed. The connecting shaft and the second slot both intersect with the first slot. The solder tube in the first adjusting block changes its angle when the connecting shaft rotates relative to it. The second adjusting block is connected to the second cylinder assembly.

[0012] Furthermore, a notch is formed in the middle of the first adjusting block, and two parallel first connecting pieces with a gap are formed on both sides of the notch. A first through slot is formed between the two first connecting pieces. The two first connecting pieces are fixed by bolts and nuts to clamp the solder tube passing through the first through slot. A connecting shaft protrudes from the first adjusting block on the side opposite to the notch opening. The connecting shaft is formed as a cylindrical shaft, and the connecting shaft and the first through slot are located on the same horizontal plane and form a cross between them.

[0013] Furthermore, a notch is formed in the middle of the second adjusting block, and two parallel second connecting pieces with a gap are formed on both sides of the notch. A second through slot is formed between the two second connecting pieces. The two second connecting pieces are fixed by bolts and nuts to clamp the connecting shaft passing through the second through slot. A connecting block that can be connected to the second cylinder assembly is also provided in the second adjusting block. The second cylinder assembly drives the second adjusting block to move up and down to change its height.

[0014] Furthermore, it also includes a fuse guide assembly that can drive the material belt, which includes two support seats located on the side of the first cylinder assembly. The top surface of the support seat is recessed with a guide groove through which the material belt can pass. There is an interval space between the two support seats for the heating block to move up and down.

[0015] Furthermore, the first cylinder assembly includes a cylinder seat, a cylinder body, a first piston rod, a guide post, and a first push block. The cylinder body is located in the middle of the cylinder seat, and the cylinder seat is also provided with at least one longitudinal guide groove located on the side of the cylinder body. The guide post passes through the longitudinal guide groove and slides up and down parallel to the path of the first piston rod. The first push block is fixed to the top of the first piston rod and the guide post, and the heating block is fixed to the top of the first push block. The first piston rod drives the heating block to move up and down.

[0016] With the above structure, the automatic tinning device for fuses of this invention has the following advantages over the prior art:

[0017] (1) It can realize the automated tinning of fuses, which greatly improves production efficiency and ensures product quality;

[0018] (2) By pushing the solder bar horizontally into the tin-filling groove of the fuse, the solder bar can be accurately and stably placed in the corresponding position. The heated solder bar melts directly in the tin-filling groove, and the solder on the molten body is not easy to overflow, which greatly avoids the occurrence of defective products.

[0019] (3) The device has a simple overall structure, and the amount and position of soldering can be adjusted and controlled. It has good processing accuracy and can be adjusted for different fuse specifications, making it more flexible in operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model on the machine platform;

[0021] Figure 2 This is a three-dimensional structural diagram of the present invention (machine panel omitted).

[0022] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0023] Figure 4 This is a front view of the present invention;

[0024] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0025] Figure 6 This is an exploded view of the tin feeding assembly in this utility model. Detailed Implementation

[0026] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0027] Combination Figures 1 to 6 As shown, this utility model discloses an automatic soldering device for fuses. The automatic soldering device includes a solder feeding assembly 200, a heating block 3, and a first cylinder assembly 400. First, as... Figure 1 , Figure 3 As shown, the fuse 1 is a strip-shaped sheet, and each fuse 1 has at least one solder-filling groove 11 recessed in the width direction. The fuse 1 forms a continuous strip 10 in the length direction. The heating block 3 is fixed to the top of the first cylinder assembly 400 and is driven by the first cylinder assembly 400 to move up and down. The solder feeding assembly 200 includes a solder outlet tube 21. The strip-shaped solder bars (not shown in the figure) are successively fed out through the solder outlet tube 21. The strip 10 is driven at the front end of the solder outlet tube 21, and the solder bars fed out through the solder outlet tube 21 can fall into the solder-filling groove 11. The heating block 3 is provided with a positioning groove 31 into which the solder-filling groove 11 can be embedded. After the heating block moves up, it can abut against the bottom of the fuse 1, and the solder-filling groove 11 can be embedded in the positioning groove 31 and heated after the heating block moves up. The solder bars in the solder-filling groove 11 are filled into the solder-filling groove 11 after heating.

[0028] like Figure 3 As shown, in this embodiment, each fuse 1 has a tin-filling groove 11 recessed in the width direction near its center. Both the tin-filling groove 11 and the positioning groove 31 on the heating block 3 are U-shaped grooves with a U-shaped cross-section. Of course, the tin-filling groove 11 and the positioning groove 31 can also be semi-circular or V-shaped grooves or V-shaped grooves with a semi-circular or V-shaped cross-section. The solder bar can be cylindrical, with its length less than or equal to the length of the tin-filling groove 11. After heating, the solder bar forms molten solder that fills the tin-filling groove, preventing overflow (the solder in the tin-filling groove, after being heated by heat conduction, forms a molten state, and at this time, the solder also has a certain surface tension). The heating block 31 can be made of a heat-conducting material, and heating elements such as heating tubes or heating rods can be placed in the heating block 3.

[0029] The middle of the solder tube 21 has a channel 211 through which solder bars can pass. In this example, the cross-section of the channel 211 is circular. The front end of the channel 211 is directly opposite the rear of the solder filling groove 11 of the fuse 1 after the transmission stops. The solder bars are pushed out one by one from the rear end of the channel 211, so that the solder bars can be pushed into the solder filling groove 11 one by one.

[0030] Combination Figure 1 , Figure 2As shown, the automatic soldering device also includes a fuse guide assembly that can drive the material strip. The fuse guide assembly includes two support seats 51 located on both sides of the first cylinder assembly 400. The support seats 51 can be fixed to the panel of the machine. The top surface of the support seat 51 is recessed with a guide groove 511 through which the material strip 10 can pass. The width of the guide groove 511 corresponds to the outer width of the fuse, so that the material strip 10 is limited to advance in the guide groove 511. There is a gap space between the two support seats 51 for the heating block 3 to move up and down. The front end of the solder tube 21 also protrudes into this gap space and is located just behind the fuse. After being supported and limited by the guide groove 511, the advancing material strip 10 can drive the fuse 1 to be conveyed above the heating block 3 and to the front end of the solder tube 21, completing the subsequent soldering and heating steps.

[0031] like Figure 2 , Figure 4 As shown, the first cylinder assembly 400 may include a first bracket 41, a cylinder seat 42, a cylinder body (located in the middle of the cylinder seat 42, not shown in the figure), a first piston rod 43, a guide post 44, and a first push block 45. The cylinder seat 42 is fixed to the first bracket 41, and the cylinder body is located in the middle of the cylinder seat 42. The cylinder seat 42 is also provided with at least one longitudinal guide groove 421 located on the side of the cylinder body. In this embodiment, a longitudinal guide groove 421 is provided on each side of the cylinder body, that is, two guide posts 44 are provided on both sides of the first piston rod 43. The guide posts 44 slide up and down through the longitudinal guide grooves 421, so that the guide posts 44 slide up and down synchronously parallel to the path of the first piston rod 43. The first push block 45 is fixed to the top of the first piston rod 43 and the guide post 44. The heating block 3 is fixed to the top of the first push block 45. The first piston rod 44 drives the heating block 3 to move up and down. The guide post 44 can play a guiding role and improve the stability of the up and down movement of the first push block 45.

[0032] Combination Figure 2 and Figure 6 As shown, the solder feeding assembly 200 also includes a first adjusting block 22, a second adjusting block 23, and a second cylinder assembly 24. The solder outlet tube 21 can slide into and be fixed in the first through slot 221 of the first adjusting block 22. A connecting shaft 222 protrudes from the outer side of the first adjusting block 22 and passes through the second through slot 231 of the second adjusting block 23. The connecting shaft 222 can rotate in the second through slot 231 and then be fixed. The connecting shaft 222 and the second through slot 231 both intersect with the first through slot 221. The solder outlet tube 21 in the first adjusting block 22 can change its angle (e.g., raise or lower) when the connecting shaft 222 rotates relative to it. At the same time, the second adjusting block 23 can also be connected to the second cylinder assembly 24, thereby achieving height change through the second cylinder assembly 24.

[0033] Specifically, a notch 223 is formed in the middle of the first adjusting block 22. Two parallel first connecting pieces 224 with a gap are formed on both sides of the notch 223. A first through slot 221 is formed between the two first connecting pieces 224. The two first connecting pieces 224 can be fixed together by bolts and nuts 225 to clamp the solder tube 21 passing through the first through slot 221. The connecting shaft 222 protrudes from the first adjusting block 22 on the side opposite to the notch 223. The connecting shaft 222 is a cylindrical shaft, and the connecting shaft 222 and the first through slot 221 are located on the same horizontal plane and form a cross with the first through slot 221 in spatial relationship. A notch 232 is formed in the middle of the second adjusting block 23. Two parallel second connecting pieces 233 with a gap are formed on both sides of the notch 232. A second through slot 231 is formed between the two second connecting pieces 233. The two second connecting pieces 233 can be fixed together by bolts and nuts 234 to clamp the connecting shaft 222 passing through the second through slot 231. A connecting block 235 protrudes from the second adjusting block 23 and can be connected to the second cylinder assembly 24, so that the second cylinder assembly 24 drives the second adjusting block 23 to move up and down to change its height, thereby changing the height of the solder tube 21. When the protrusion length of the solder tube 21 needs to be adjusted, the solder tube 21 can be slid into the first through slot 221 to the required position and fixed. When the height of the solder tube 21 needs to be adjusted, the height of the second adjusting block 23 can be adjusted by using the second cylinder assembly 24. When the angle of the solder tube 21 needs to be adjusted, the connecting shaft 222 on the first adjusting block 22 can be rotated to the required angle and fixed.

[0034] When the automatic tinning device for the fuse of this utility model is working, the conveyor belt 10 passes through the guide slot 511 via the support seat 51 of the fuse guide assembly and stops above the heating block 3 at the front end of the solder outlet tube 21 (according to the set position). Then the solder outlet tube 21 of the solder feeding assembly pushes the solder bar into the tin filling groove 11 of the fuse. Then the heating block 3 is lifted by the drive of the first cylinder assembly, and the tin filling groove 11 is embedded in the positioning groove 31 and heated to melt the solder bar and complete the tinning. Then the heating block descends, and the conveyor belt continues to move forward to complete the tinning action of the next tin filling groove 11.

[0035] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. An automatic tin-filling device for fuses each of which is concavely provided with at least one tin-filling groove in a width direction, and the fuses are continuously formed into a tape in a length direction, characterized in that: a plurality of the fuses are arranged in a row in the width direction; a plurality of the fuses are arranged in a row in the length direction; and the fuses are arranged in a matrix form. The automatic tin feeding device comprises a tin feeding assembly, a heating block and a first cylinder assembly. The heating block is fixed on the top of the first cylinder assembly and is driven by the first cylinder assembly to move up and down. The tin feeding assembly comprises a tin outlet pipe. The tin bar in the shape of a pipe is fed out through the tin outlet pipe. The material belt is driven at the front end of the tin outlet pipe. The tin bar fed out through the tin outlet pipe falls into the tin filling groove. The heating block is provided with a positioning groove in which the tin filling groove is embedded. The heating block after moving up abuts against the lower part of the fuse body. The tin filling groove is embedded in the positioning groove and is heated after the heating block moves up. The tin bar in the tin filling groove is filled after being heated.

2. An automatic tin feeding apparatus for a fuse body as defined in claim 1, wherein: The tin filling groove and the positioning groove on the heating block are both U-shaped grooves with U-shaped cross sections.

3. An automatic tin feeding apparatus for a fuse body as defined in claim 1, wherein: The length of the tin bar is less than or equal to the length of the tin filling groove.

4. An automatic tin feeding apparatus for fuses as defined in claim 1, wherein: A passage is formed in the middle of the tin outlet pipe for the tin bar to pass through. The front end of the passage is opposite to the rear of the tin filling groove of the fuse body after the driving stops. The tin bar is pushed out one by one from the rear end of the passage through the passage.

5. An automatic tin feeding apparatus for fuses as claimed in claim 1 or 4 wherein: The tin feeding assembly further comprises a first adjusting block, a second adjusting block and a second cylinder assembly. The tin outlet pipe is fixed after being slidably inserted into the first through groove of the first adjusting block. A connecting shaft is protruded outside the first adjusting block. The connecting shaft is inserted into the second through groove provided on the second adjusting block and is fixed after rotating in the second through groove. The connecting shaft and the second through groove are both intersected with the first through groove. The tin outlet pipe in the first adjusting block changes the angle when the connecting shaft relatively rotates. The second adjusting block is connected to the second cylinder assembly.

6. An automatic tin feeding apparatus for fuses as defined in claim 5, wherein: A missing groove is formed in the middle of the first adjusting block. Two first connecting pieces parallel to each other and having a spacing are formed on both sides of the missing groove. The first through groove is formed between the two first connecting pieces. The two first connecting pieces are fixed by bolts and nuts to clamp the tin outlet pipe passing through the first through groove. The connecting shaft is protruded on the side of the first adjusting block opposite to the missing groove. The connecting shaft is in the shape of a cylindrical shaft and is located on the same horizontal plane as the first through groove and is cross intersected with the first through groove.

7. An automatic tin feeding apparatus for a fuse body as defined in claim 6, wherein: A missing groove is formed in the middle of the second adjusting block. Two second connecting pieces parallel to each other and having a spacing are formed on both sides of the missing groove. The second through groove is formed between the two second connecting pieces. The two second connecting pieces are fixed by bolts and nuts to clamp the connecting shaft passing through the second through groove. A connecting block connected to the second cylinder assembly is further protruded in the second adjusting block. The second cylinder assembly drives the second adjusting block to move up and down to change the height.

8. An automatic tin feeding apparatus for fuses as defined in claim 1, wherein: The fuse body guiding assembly which can drive the material belt to drive further comprises two support seats respectively located on the side edges of the first cylinder assembly. A guiding support groove through which the material belt passes is concavely provided on the top surface of the support seat. The two support seats have a spacing space through which the heating block moves up and down.

9. An automatic tin feeding apparatus for fuses as defined in claim 1, wherein: The first cylinder assembly comprises a cylinder seat, a cylinder body, a first piston rod, a guide column and a first pushing block. The cylinder body is located in the middle of the cylinder seat. At least one longitudinal guide groove is provided in the cylinder seat and is located on the side edge of the cylinder body. The guide column is inserted into the longitudinal guide groove and slides up and down parallel to the path of the first piston rod. The first pushing block is fixed on the top of the first piston rod and the guide column. The heating block is fixed on the top of the first pushing block. The first piston rod drives the heating block to move up and down.

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