A tin ring forming device and an automatic fuse production line

Abstract

The application discloses a tin ring forming device and an automatic fuse production line, which comprises a feeding mechanism and a tin ring forming mechanism. The tin ring forming mechanism comprises a bearing part, a first forming assembly, a first die, a first forming groove, an unformed section, a cutting device, a second forming assembly and a third forming assembly. The first die is provided with the first forming groove, which is used for forming the middle part of the tin wire into an arc-shaped section. The arc-shaped section is connected with the unformed section at both ends. The cutting device is used for cutting the unformed section connected with the tin wire. The second forming assembly is used for clamping two unformed sections to bend inward and fold. The third forming assembly comprises a third driving device and a second die, which is used for driving the second die to press the two folded unformed sections against the outer periphery of the bearing part, so as to form the tin ring together with the arc-shaped section. The first forming assembly, the second forming assembly and the third forming assembly are matched with the bearing part, and a step-by-step forming mode is adopted, so that the problems of tin wire rebound and large tin ring opening caused by one-time ring forming are reduced.

Description

Technical Field

[0001] This invention relates to the field of fuse manufacturing equipment technology, and in particular to a tin ring forming device and an automatic fuse production line. Background Technology

[0002] Solder rings are an important auxiliary material in the soldering of electronic components. For example, in the soldering process of fuses and other electronic components, solder wire needs to be formed into solder rings and then placed on the end of the ceramic tube of the fuse before soldering to achieve a seal at the end of the ceramic tube. Solder rings can make the solder evenly distributed around the solder joint, reduce cold solder joints, and improve the stability and reliability of the soldering.

[0003] Currently, the main problems in the manufacture of tin rings are as follows: On the one hand, in existing technologies, tin rings are mostly made by manual winding, where the tin wire is straightened, wound, and cut manually. This method is inefficient, labor-intensive, and produces tin rings with poor dimensional accuracy and quality consistency, which cannot meet the needs of large-scale industrial production.

[0004] To improve the above situation, the industry has attempted to develop automated equipment to achieve mechanized forming of solder rings. For example, CN112756849B discloses an automatic solder ring winding device, which includes a bottom mechanism, a wire feeding mechanism, and a solder ring guiding mechanism. The wire feeding mechanism is equipped with a cutting mechanism, the solder ring guiding mechanism is equipped with a pushing mechanism, and the pushing mechanism is equipped with a solder ring forming mechanism. Its working principle is as follows: After the solder drum is fed, the active wheel and driven wheel driven by the wire feeding motor clamp the solder wire. At the same time, the bottom mechanism drives the entire wire feeding mechanism to move forward through the lead screw, sending the solder wire to the side of the guide pin on the solder ring guiding mechanism. The horizontal cylinder drives the limiting claw to clamp and fix the end of the solder wire on the guide pin. The blade of the cutting mechanism cuts the solder wire. Then, the pushing mechanism pushes the solder ring forming mechanism closer. The forming claw cylinder drives the symmetrically arranged left claw and right claw to close towards each other. The arc-shaped forming groove on the two claws is used to press and bend the fixed-length solder wire into a ring in one go. The solder ring is sleeved on the guide pin. Finally, the vertical cylinder drives the ring dropping block to move downward, knocking the solder ring off the guide pin and demolding it.

[0005] However, the aforementioned existing technologies still have the following problems: 1) Lack of positioning constraints makes the solder wire prone to displacement, resulting in uncontrollable interface closure quality. The forming method uses two arc forming grooves of the left and right jaws to clamp the solder wire into a ring at one time. The two ends of the solder wire naturally align under the clamping action. It is not easy for the solder wire to be kept on a horizontal plane. Due to the tilt of the solder wire, when the left and right jaws clamp it later, the solder wire, which is in a free state, is prone to jumping or displacement when the jaws close. Misalignment is likely to occur at the closed interface of the solder ring, and it is easy to form a spiral shape rather than a ring shape. 2) Large springback after one-time forming. The straight solder wire is bent under pressure in one go, and the stress is concentrated at the bend. Moreover, the solder wire lacks the continuous support of the inner mold after forming. After the pressure is released, the springback is obvious, resulting in poor roundness of the solder ring and unstable dimensions.

[0006] Based on the above defects and shortcomings, it is necessary to improve the existing technology and design a tin ring forming device and an automatic fuse production line. Summary of the Invention

[0007] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a solder ring forming device and an automatic fuse production line, comprising: a feeding mechanism for continuously releasing solder wire; a solder ring forming mechanism for forming the solder wire into a solder ring; the solder ring forming mechanism comprising: a carrier member, which is vertically and movably disposed on one side of the solder wire; the carrier member having an outer peripheral contour adapted to the inner wall of the solder ring; a first forming component comprising a first driving device and a first die connected to the output end of the first driving device; the first die having a first forming groove adapted to the outer peripheral wall of the solder ring on the side facing the carrier member; the first driving device being used to drive the first die to press the solder wire against the outer periphery of the carrier member and form the middle part of the solder wire into an arc-shaped segment; The arc-shaped segment has unformed segments connected to both ends; a cutting device, disposed opposite to the solder wire, is used to cut off the unformed segments connected to the solder wire; a second forming assembly includes a second driving device and a pair of jaws connected to the output end of the second driving device, used to clamp the two unformed segments and bend them inward and close them; a third forming assembly includes a third driving device and a second mold connected to the output end of the third driving device; the second mold has a second forming groove on the side facing the carrier that is adapted to the outer peripheral wall of the solder ring, and the second forming groove is disposed opposite to the first forming groove; the third driving device is used to drive the second mold to press the two closed unformed segments against the outer periphery of the carrier, so that they surround the arc-shaped segment to form the solder ring.

[0008] Preferably, the tin ring forming device further includes a wire guiding mechanism, which includes two wire guiding wheels that can rotate around their own axes. At least one of the wire guiding wheels is connected to the output end of a motor so as to be driven to rotate by the motor. Both of the wire guiding wheels have annular grooves on their circumferences, and the tin wire is clamped between the two annular grooves.

[0009] Preferably, the two guide wheels are rotatably connected to a first slide block; the two first slide blocks are slidably connected to the same slide rail, and an elastic reset member is connected between the two first slide blocks so that the solder wire is elastically clamped between the two annular grooves.

[0010] Preferably, the wire guiding mechanism further includes a first wire guiding tube disposed between the feeding mechanism and the wire guiding wheel to guide the solder wire into the annular groove; the first wire guiding tube is fixed on a first slide block.

[0011] Preferably, the wire guiding mechanism further includes a second wire guiding tube disposed on one side of the wire guiding wheel, and the second wire guiding tube extends in a straight line so that the solder wire passes through and is straightened between the two wire guiding wheels.

[0012] Preferably, the first die has two inclined portions on the side facing the support member. The two inclined portions are respectively located on both sides of the opening of the first forming groove, and both inclined portions are inclined towards the outer periphery of the support member, so that when the first die presses the solder wire, the two inclined portions will respectively squeeze the two unformed segments inward and close together.

[0013] Preferably, the two inclined portions have the same degree of inclination and are arranged symmetrically.

[0014] Preferably, the first die is further provided with a first limiting groove on the side facing the carrier; the first limiting groove extends along the solder wire conveying direction and passes through the first forming groove; the inner wall of the first limiting groove is adapted to the outer periphery of the solder wire to restrict the movement of the solder wire in the vertical direction when the first die presses the solder wire.

[0015] Preferably, the second die is further provided with a second limiting groove on the side facing the carrier; the second limiting groove extends along the solder wire conveying direction and traverses the second forming groove; the inner wall of the second limiting groove is adapted to the outer periphery of the solder wire to restrict the movement of the solder wire in the vertical direction when the second die presses the solder wire.

[0016] Preferably, each of the two grippers has a first groove on its opposite sides. The first groove extends horizontally and is used to restrict the two unshaped segments from moving vertically during the process of clamping and closing the two unshaped segments inward.

[0017] Preferably, each of the pair of grippers has a second groove on its side facing the carrier, and the second groove is connected to the first groove to form an L-shaped groove structure, which is used to restrict the two unformed segments from moving in the vertical direction before their ends abut against each other.

[0018] Preferably, the cutting device includes a cutter disposed above the solder wire feeding path, the cutter being connected to the output end of a linear drive device to cut the solder wire.

[0019] Preferably, a mating seat is provided on one side of the carrier, the mating seat is connected to the output end of the horizontal drive device, and the horizontal drive device is connected to the output end of the vertical drive device; the mating seat has one or two cutting edges on the side facing the carrier, and the first drive device is used to drive the first die to press the two unformed segments against the mating seat, and cut the unformed segments connected to the solder wire to a fixed length through the cutting edges.

[0020] Preferably, the solder ring forming device further includes a ring-removing mechanism, which includes a telescopic drive device and a lifting platform connected to the output end of the telescopic drive device; the telescopic drive device drives the lifting platform to move along the extension direction of the carrier to remove the solder ring.

[0021] Preferably, the solder ring forming device further includes: a conveying mechanism for conveying the solder ring on the lifting platform to one end of the fuse; the conveying mechanism includes a clamping device, which is fixed to the output end of a telescopic device; the telescopic device is fixed to the second slide of a straight module to convey the solder ring to the welding station.

[0022] The present invention also provides an automated fuse production line, including the aforementioned tin ring forming device; the automated fuse production line further includes, in sequence: a ceramic tube feeding station for continuously conveying the ceramic tube body; a melt wire threading station for threading the melt body into the ceramic tube body; a first tin ring feeding station, including one of the aforementioned tin ring forming devices for placing a tin ring at the first end of the fuse; a first welding station for welding the tin ring to the first end of the fuse to seal one end of the ceramic tube body; a flipping station, including a flipping mechanism and a clamp fixed on the flipping mechanism, for flipping the fuse so that the open end of the ceramic tube body faces upward; a sand filling station for filling sand into the ceramic tube body; a second tin ring feeding station, including another of the aforementioned tin ring forming devices for placing another tin ring at the second end of the fuse; and a second welding station for welding the tin ring to the second end of the fuse to seal the other end of the ceramic tube body.

[0023] Compared with the prior art, the beneficial effects of the present invention are: The present invention provides a first limiting groove on one side of the first mold facing the carrier. The first limiting groove extends along the solder wire conveying direction, so that the two ends of the solder wire are vertically constrained, ensuring that the two ends of the solder wire are not easily misaligned after forming, such as not forming a spiral shape. It also ensures that the subsequent cutting device can accurately cut the unformed section and the cut is flat.

[0024] This invention restricts the vertical movement of two unformed segments at the forming front edge by setting a first groove and a second groove. During the clamping and closing process, the two unformed segments are in a cantilevered state, constrained only by the friction of the clamping surfaces. They are prone to vertical jumping and warping due to vibration or fluctuations in clamping force, leading to misalignment of the bending position and uneven height after closure. With the first and second grooves, the ends of the two unformed segments are precisely aligned, and the interface is less prone to misalignment.

[0025] This invention, by setting up a first forming component, a second forming component, and a third forming component in conjunction with a carrier, utilizes a step-by-step progressive forming method of central arc forming, cutting off, bending and closing both ends, and overall encirclement. This reduces the problems of solder wire springback and large solder ring opening caused by one-time ring forming, resulting in good solder ring roundness.

[0026] This invention utilizes two guide wheels rotatably connected to a slide block, with an elastic reset element connecting the two slide blocks. When there are fluctuations in the solder wire diameter, the two slide blocks can adaptively open or close. The elastic clamping allows for automatic adjustment of the clamping force, accommodating solder wires of different diameters. It is compatible with multiple specifications without requiring parts replacement, demonstrating strong versatility. Furthermore, it compensates for minor fluctuations in the solder wire diameter, reducing damage from excessive clamping or slippage from excessive clamping, ensuring stable and reliable wire feeding.

[0027] This invention features two inclined portions on one side of the first die, positioned on either side of the opening of the first forming groove. Both inclined portions are inclined towards the outer periphery of the support member, pressing the two unformed segments inward and bringing them together. This achieves simultaneous arc forming and pre-bending, completing both the arc forming and pre-bending of the unformed segments in a single stamping action of the first die, shortening the process and increasing cycle time. The pre-bending causes the two unformed segments to tilt towards the closing direction, reducing the bending burden on the grippers of the subsequent second forming component. The grippers do not need to open too wide, reducing the opening time of the grippers. The inclined guiding effect makes the bending transition smooth, reducing stress concentration and cracking at the bending point. Attached Figure Description

[0028] Figure 1 This is a general structural diagram of a tin ring forming device.

[0029] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0030] Figure 3 This is a structural diagram of the feeding mechanism.

[0031] Figure 4 for Figure 3 A magnified view of a portion of point D.

[0032] Figure 5This is a structural diagram of the tin ring forming mechanism.

[0033] Figure 6 for Figure 5 A magnified view of a portion of point B in the middle.

[0034] Figure 7 for Figure 6 A magnified view of a portion of point C.

[0035] Figure 8 A structural diagram showing the setup of two second cutting edges.

[0036] Figure 9 This is a structural diagram of a tin ring.

[0037] Figure 10 This is a schematic diagram of each station on the automated fuse production line.

[0038] Figure 11 This is a schematic diagram of the first limiting groove.

[0039] Figure 12 This is a schematic diagram of the second limiting groove.

[0040] Figure 13 This is a schematic diagram of the horizontal drive device, the vertical drive device, and the mating seat.

[0041] Figure 14 This is a structural diagram of the gripper, the first groove, and the second groove.

[0042] Figure 15 This is a structural diagram showing two unformed segments being held by a pair of grippers, with the unformed segments positioned within the first groove.

[0043] Figure 16 This is a structural diagram showing two unformed segments sandwiched together in parallel.

[0044] Figure 17 This is a structural diagram showing the two unformed sections continuing to close together, with the unformed sections located at the junction of the first and second tanks.

[0045] Figure 18 This is a structural diagram showing the two unformed segments continuing to close together, with the unformed segments located within the second groove.

[0046] Among them, 1-feeding mechanism; 2-wire guiding mechanism; 3-tin ring forming mechanism; 4-ring taking mechanism; 5-transferring mechanism; 6-ceramic tube feeding station; 7-melt wire threading station; 8-first tin ring feeding station; 9-first welding station; 10-turning station; 11-sand filling station; 12-second tin ring feeding station; 13-second welding station; 101-tin wire; 102-tin ring; 1011-arc section; 1012-unformed section; 201-wire guide wheel; 202-first slide block; 2021-first wire guide tube; 203-slide rail; 204-elastic reset component; 205-second wire guide tube; 206-motor; 300-bearing component; 301-first forming assembly; 3011-first driving device; 3012-first... 1. Press mold; 30121-First limiting groove; 3013-First forming groove; 3014-Inclined part; 302-Second forming component; 3021-Second driving device; 3022-Gripper; 30221-First groove; 30222-Second groove; 303-Third forming component; 3031-Third driving device; 3032-Second press mold; 30321-Second limiting groove; 3033-Second forming groove; 304-Cutting device; 3041-Blade; 305-Matching seat; 3051-Horizontal driving device; 3052-Vertical driving device; 401-Telescopic driving device; 402-Lifting platform; 501-Clamping device; 502-Telescopic device; 503-Linear module; 504-Second slide. Detailed Implementation

[0047] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0048] Please see Figures 1 to 12 The embodiments of the present invention include: A solder ring forming apparatus and an automatic fuse production line include: a feeding mechanism 1 for continuously releasing solder wire 101; a solder ring forming mechanism 3 for forming the solder wire 101 into a solder ring 102; the solder ring forming mechanism 3 includes: a support member 300, which is vertically and movably disposed on one side of the solder wire 101; the support member 300 has an outer peripheral contour adapted to the inner wall of the solder ring 102; a first forming assembly 301, including a first driving device 3011 and a first mold 3012 connected to the output end of the first driving device 3011; the first mold 3012 has a first forming groove 3013 adapted to the outer peripheral wall of the solder ring 102 on the side facing the support member 300; the first driving device 3011 is used to drive the first mold 3012 to press the solder wire 101 against the outer periphery of the support member 300 and form the middle part of the solder wire 101 into an arc-shaped segment 1011; the two ends of the arc-shaped segment 1011 are connected to unformed segments 1012; and the circuit is cut off. Device 304, disposed opposite to solder wire 101, is used to cut off the unformed segment 1012 connected to solder wire 101; second forming component 302 includes second driving device 3021 and a pair of grippers 3022 connected to the output end of second driving device 3021, used to clamp two unformed segments 1012, bend them inward and close them; third forming component 303 includes third driving device 3031 and second mold 3032 connected to the output end of third driving device 3031; the second mold 3032 has a second forming groove 3033 on the side facing the support member 300 that is adapted to the outer peripheral wall of the solder ring 102, and the second forming groove 3033 is disposed opposite to the first forming groove 3013; the third driving device 3031 is used to drive the second mold 3032 to press the two closed unformed segments 1012 against the outer periphery of the support member 300, so that they are surrounded by the arc-shaped segment 1011 to form the solder ring 102. The specific principle is as follows: Solder wire 101 is continuously fed to one side of the carrier 300 by the feeding mechanism 1. The first driving device 3011 drives the first pressing die 3012 to press the solder wire 101 against the outer periphery of the carrier 300. By using the mating and extrusion of the first forming groove 3013 and the outer periphery of the carrier 300, the middle part of the solder wire 101 is pressed into an arc-shaped segment 1011. The arc-shaped segment 1011 is, for example, a semi-circle. Unformed segments 1012 are retained at both ends. The unformed segments 1012 are, for example, two collinear straight segments or two straight segments forming an angle with each other. Subsequently, the cutting device... 304 separates the unformed segment 1012 from the subsequent solder wire 101 to achieve fixed-length cutting; the second driving device 3021 drives a pair of grippers 3022 to clamp the two unformed segments 1012 and bend them inward to complete pre-forming; finally, the third driving device 3031 drives the second mold 3032 to press the two closed unformed segments 1012 against the outer periphery of the carrier 300, and the second forming groove 3033 cooperates with the first forming groove 3013 to make the unformed segment and the arc segment 1011 close together to form a complete solder ring 102. The step-by-step progressive forming method of "central arc forming - cutting - bending and closing - overall encirclement" reduces the problems of tin wire 101 springback and large opening of tin ring 102 caused by one-time ring forming, and the tin ring 102 has good roundness; the outer periphery of the bearing component 300 is adapted to the inner wall of the tin ring 102, and plays the role of inner mold support to ensure the stability of the inner wall dimensions; forming and cutting are completed in the same station, realizing continuous automated production of tin ring 102 with high efficiency; the first forming groove 3013 and the second forming groove 3033 are set opposite to each other, and the two arc surfaces jointly define the shape of the outer periphery of the tin ring 102.

[0049] In one embodiment, such as Figure 2 As shown, the tin ring forming device also includes a wire guiding mechanism 2, which includes two wire guiding wheels 201 that can rotate around their own axes. At least one wire guiding wheel 201 is connected to the output end of a motor 206 and is driven to rotate by the motor 206. Both wire guiding wheels 201 have annular grooves on their circumferences, and the tin wire 101 is clamped between the two annular grooves. The motor 206 drives at least one wire guiding wheel 201 to rotate, and the tin wire 101 is actively conveyed forward by the friction between the sidewall of the annular groove and the tin wire 101. The dual-wheel clamping friction feeding reduces surface damage and bending deformation of the tin wire 101 caused by traditional gripper pushing. The motor 206 drive enables precise wire feeding to a fixed length, providing a reference for the subsequent cutting by the cutting device 304. The annular grooves limit and guide the tin wire 101, preventing it from deviating during feeding.

[0050] In one embodiment, such as Figure 2As shown, two guide wheels 201 are rotatably connected to a first slide block 202; both first slide blocks 202 are slidably connected to the same slide rail 203, and an elastic reset member 204 is connected between the two first slide blocks 202 to allow the solder wire 101 to be elastically clamped between the two annular grooves. The first slide blocks 202 can slide relative to each other along the slide rail 203, and the elastic reset member 204 continuously applies opposing elastic forces to ensure that the annular grooves of the two guide wheels 201 always elastically fit and press the solder wire 101. When there is fluctuation in the diameter of the solder wire 101, the two first slide blocks 202 can adaptively open or close. The elastic clamping mechanism allows for automatic adjustment of the clamping force, accommodating solder wires 101 of different diameters. It is compatible with various specifications without the need to replace parts, making it highly versatile. Furthermore, it compensates for minor fluctuations in the diameter of the solder wire 101, reducing damage from excessive clamping or slippage from excessive clamping, ensuring stable and reliable wire feeding. The guide rail 203 ensures the parallelism of the axes of the two guide wheels 201, resulting in symmetrical and non-skewed force on the solder wire 101.

[0051] In one embodiment, such as Figure 2 As shown, the wire guiding mechanism 2 also includes a first wire guiding tube 2021, located between the feeding mechanism 1 and the wire guiding wheel 201, to guide the solder wire 101 into the annular groove; the first wire guiding tube 2021 is fixed on a first slide block 202. After the solder wire 101 exits from the feeding mechanism 1, it first passes through the inner hole of the first wire guiding tube 2021, which constrains and guides the solder wire 101, ensuring that it accurately enters the clamping area of ​​the annular groove between the two wire guiding wheels 201. The first wire guiding tube 2021 is fixed on the first slide block 202 and can float and move with the first slide block 202, ensuring that the relative position between the outlet of the wire guiding tube and the clamping point of the wire guiding wheel 201 remains unchanged, reducing the possibility of the solder wire 101 being pulled or jammed when the first slide block 202 moves.

[0052] In one embodiment, such as Figure 2 As shown, the wire guiding mechanism 2 also includes a second wire guiding tube 205, located on one side of the wire guiding wheel 201, and extending in a straight line to allow the solder wire 101 to pass through and be straightened between the two wire guiding wheels 201. After passing through the two wire guiding wheels 201, the solder wire 101 enters the straight-extending second wire guiding tube 205. Because the tube body is straight and the inner hole is a straight hole, the solder wire 101 is forcibly straightened when passing through, eliminating the bending stress remaining during the unwinding process. The solder wire 101 released by the unwinding mechanism 1 is in a coiled state. If it is not straightened and directly formed, it will cause uneven deformation of the arc segment 1011. The second wire guiding tube 205 realizes the integration of "conveying + straightening", eliminating the need for a separate straightening device; the straightened solder wire 101 has a stable posture, improving the forming consistency of the solder ring 102.

[0053] In one embodiment, such as Figure 9As shown, the first die 3012 has two inclined portions 3014 on the side facing the support member 300. The two inclined portions 3014 are respectively located on both sides of the opening of the first forming groove 3013, and both inclined portions 3014 are inclined towards the outer periphery of the support member 300. When the first die 3012 presses the solder wire 101, the two inclined portions 3014 respectively squeeze the two unformed sections 1012 inward and close together. When the first die 3012 presses the solder wire 101, in addition to the first forming groove 3013 pressing the middle part into an arc-shaped section 1011, the inclined surfaces of the two inclined portions 3014 simultaneously contact the unformed sections 1012 on both sides. As the first die 3012 continues to move forward, the two inclined portions 3014 squeeze the two unformed sections 1012 inward and close together, realizing the simultaneous completion of "pressing arc shape + pre-bending". The inclined portion 3014 is, for example, an inclined surface. In a single stamping action of the first die 3012, the forming of the arc segment 1011 and the pre-bending of the unformed segment 1012 are completed simultaneously, shortening the process and increasing the cycle time. The pre-bending causes the two unformed segments 1012 to tilt in the closing direction, reducing the bending burden of the subsequent second forming component 302 clamp 3022. The clamp 3022 does not need to open too much, which also reduces the opening time of the clamp 3022. The tilting guide effect makes the bending transition smooth and reduces stress concentration and cracking at the bending point.

[0054] In one embodiment, such as Figure 9 As shown, the two inclined portions 3014 have the same degree of inclination and are symmetrically arranged. The inclined portions 3014 are, for example, inclined surfaces with the same inclination angle on both sides and symmetrically arranged about the first forming groove 3013. During stamping, symmetrical and identical extrusion forces are applied to the two unformed sections 1012. This symmetrical force ensures that the two unformed sections 1012 bend in the same direction, resulting in good symmetry and high roundness in the forming of the tin ring 102. Furthermore, the mold processing is simple, making it suitable for mass production of conventional tin rings 102.

[0055] In one embodiment, such as Figure 11 As shown, the first mold 3012 is provided with a first limiting groove 30121 on the side facing the carrier 300; the first limiting groove 30121 extends along the conveying direction of the solder wire 101 and passes through the first forming groove 3013; the inner wall of the first limiting groove 30121 is adapted to the outer periphery of the solder wire 101 so as to restrict the movement of the solder wire 101 in the vertical direction when the first mold 3012 presses the solder wire 101. When the first die 3012 presses the solder wire 101, the solder wire 101 is in a free state in the vertical direction and is prone to jumping and floating due to vibration and wire feeding inertia, resulting in the displacement of the forming position. After the first limiting groove 30121 is set, the solder wire 101 is embedded in the limiting groove, and the two ends of the solder wire 101 are vertically constrained, which ensures that the two ends of the solder wire 101 are not easily misaligned after forming, such as not easily forming a spiral shape. It also ensures that the subsequent cutting device 304 cuts the unformed section 1012 with accurate cutting length and flat cut.

[0056] In one embodiment, such as Figure 12 As shown, the second die 3032 is provided with a second limiting groove 30321 on the side facing the carrier 300; the second limiting groove 30321 extends along the conveying direction of the solder wire 101 and passes through the second forming groove 3033; the inner wall of the second limiting groove 30321 is adapted to the outer periphery of the solder wire 101 so as to restrict the movement of the solder wire 101 in the vertical direction when the second die 3032 presses the solder wire 101. After being bent and closed by the second forming component 302, the two unformed segments 1012 are in an unformed state. Before being pressed together by the second mold 3032 to form a ring, the two unformed segments 1012 may bounce up or misalign in the vertical direction due to external disturbance, resulting in misalignment of the closing interface of the two unformed segments 1012. The second limiting groove 30321 can pre-constrain the closed unformed segments 1012 in the vertical direction to ensure accurate forming and further reduce the defect rate. Specifically, regarding the change of the two unformed segments 1012 from an open "outward" state to a closed "inward" state, the detailed disassembly steps are as follows: First, as Figure 15 As shown, a pair of grippers 3022 are brought close together, and the unformed segment 1012 is located within the first groove 30221. The first groove 30221 limits the unformed segment 1012 to prevent it from wobbling up and down. Secondly, as... Figure 16 As shown, the pair of grippers 3022 continue to move closer together, the two unformed segments 1012 are parallel to each other, and the unformed segments 1012 remain within the first groove 30221. Third, as... Figure 17 As shown, the pair of grippers 3022 continue to move closer together, and the two unformed segments 1012 continue to move closer together. The near end of the unformed segment 1012 is located at the intersection of the first groove 30221 and the second groove 30222. IV. As Figure 18 As shown, the pair of grippers 3022 continue to move closer together, and the two unformed segments 1012 continue to move closer together, wrapping around the outer periphery of the support 300. The unformed segments 1012 are primarily located within the second groove 30222. The main function of the pair of grippers 3022 is to close the two unformed segments 1012 together, awaiting the second forming groove 3033 to compress the closed unformed segments 1012, ultimately forming a tin ring 102. The closure and forming of the two unformed segments 1012 can be achieved without the first groove 30221 and the second groove 30222, but the effect is slightly inferior.

[0057] In one embodiment, such as Figure 14As shown, a pair of grippers 3022 each have a first groove 30221 on their opposite sides. The first groove 30221 extends horizontally and is used to restrict the vertical movement of the two unshaped segments 1012 during the process of clamping and closing them together. During the clamping and closing process, the two unshaped segments 1012 are in a cantilevered state, constrained only by the friction of the clamping surfaces. They are prone to vertical jumping and tilting due to vibration or fluctuations in clamping force, resulting in misalignment of the bending position and uneven height after closing. With the first groove 30221, the unshaped segments 1012 are vertically limited by the groove wall of the first groove 30221 throughout the closing process, ensuring accurate bending and high alignment accuracy after closing. Moreover, the first groove 30221 is directly formed on the side of the gripper 3022 body and moves synchronously with the gripper 3022, without the need for separate clamping or limiting components.

[0058] In one embodiment, such as Figure 14 As shown, a pair of grippers 3022 each have a second groove 30222 on their sides facing the support member 300. The second groove 30222 is connected to the first groove 30221, forming an L-shaped groove structure. This structure restricts the vertical movement of the two unformed segments 1012 before their ends abut together. Before the ends of the two unformed segments 1012 abut together, they are in a suspended state and not yet formed. This is a stage in the entire forming process where they are easily disturbed and prone to vertical jumping or springing. Once jumping occurs, it leads to end misalignment and misalignment of the interface. With the second groove 30222, the unformed segments 1012 are supported and limited by the bottom of the second groove 30222 before their ends abut together, ensuring precise end-to-end positioning and preventing interface misalignment.

[0059] In one embodiment, the cutting device 304 includes a cutter disposed above the solder wire 101 conveying path. The cutter is connected to the output end of a linear drive device to cut the solder wire 101. The linear drive device is, for example, a cylinder or an electric telescopic rod. The linear drive device drives the cutter to press down and cut the solder wire 101 on the conveying path, which has a simple structure.

[0060] In one embodiment, such as Figure 9As shown, a mating seat 305 is provided on one side of the carrier 300. The mating seat 305 is connected to the output end of the horizontal drive device 3051, and the horizontal drive device 3051 is connected to the output end of the vertical drive device 3052. The mating seat 305 has one or two cutting edges 3041 on the side facing the carrier 300. The first drive device 3011 is used to drive the first die 3012 to press the two unformed sections 1012 against the mating seat 305, and cuts the unformed sections 1012 connected to the solder wire 101 to a fixed length through the cutting edges 3041. The horizontal drive device 3051 and the vertical drive device 3052 are connected to the carrier 300. 052 are all cylinders or electric telescopic rods, etc. The mating seat 305 has a through slot on the corresponding frame. When the mating seat 305 is not working, it is located below the through slot to avoid the operation of other parts. When working, the mating seat 305 is raised from below the through slot by the vertical drive device 3052 and then horizontally transported to the position by the horizontal drive device 3051. When the first drive device 3011 drives the first die 3012 forward, the cutting edge 3041 cooperates with the first die 3012 to cut off the unformed section 1012 pressing against the mating seat 305, realizing the "stamping and forming + cutting" in the same driving action. The cutting is completed by using the stamping stroke of the first die 3012, without the need for a separate cutting drive source, saving a set of power devices, making the structure compact and reducing costs. During cutting, the unformed section 1012 is pressed tightly on the mating seat 305 by the die, and the solder wire 101 does not move during the cutting process. The mating seat 305 can be raised and lowered to avoid interference with the wire feeding and forming actions when not cutting. When using two cutting edges 3041, the two cutting edges 3041 move synchronously to cut off the two unformed segments 1012 in one go. Simultaneous cutting from both sides ensures that the two unformed segments 1012 are of the same length, and after closing, the two sides of the tin ring 102 interface are symmetrically aligned, resulting in good forming quality. The width of the mating seat 305 should be less than the maximum distance between a pair of jaws 3022, so that the mating seat 305 can mate with the carrier 300.

[0061] In one embodiment, such as Figure 7 As shown, the solder ring forming device also includes a ring-removing mechanism 4, which includes a telescopic drive device 401 and a lifting platform 402 connected to the output end of the telescopic drive device 401. The telescopic drive device 401 drives the lifting platform 402 to move along the extension direction of the support member 300 to remove the solder ring 102. The solder ring 102 is formed on the outer periphery of the support member 300. The telescopic drive device 401 drives the lifting platform 402 to move vertically along the extension direction of the support member 300. The lifting platform 402 supports the bottom of the solder ring 102 and pushes or removes the solder ring 102 from the support member 300. This achieves automatic demolding and unloading of the solder ring 102 without manual removal.

[0062] In one embodiment, such as Figure 5As shown, the solder ring forming device further includes: a conveying mechanism 5, used to convey the solder ring 102 on the lifting platform 402 to one end of the fuse; the conveying mechanism 5 includes a clamping device 501, which is fixed to the output end of a telescopic device 502; the telescopic device 502 is fixed to the second slide 504 of a linear module 503 to convey the solder ring 102 to the welding station. The linear module 503 includes, for example, a motor and a lead screw fixed to the output end of the motor. The lead screw is threaded with the second slide 504, which is slidably connected to the track. The linear module 503 drives the second slide 504 to move the entire conveying assembly horizontally between the ring picking position and the welding station; after reaching the position, the telescopic device 502 extends, allowing the clamping device 501 to approach and clamp the solder ring 102 on the lifting platform 402, and then move it horizontally to the end of the fuse, realizing the transfer of the solder ring 102 from the forming station to the assembly station, reducing manual intervention, and improving the overall automation level and cycle stability of the fuse production line.

[0063] This invention also provides an automated fuse production line, such as... Figure 12 As shown, the automatic fuse production line includes the aforementioned tin ring forming device; it also includes, in sequence: a ceramic tube feeding station 6 for continuously conveying the ceramic tube body; a melt wire threading station 7 for threading the melt body into the ceramic tube body; a first tin ring feeding station 8, including a tin ring forming device for placing a tin ring 102 at the first end of the fuse; a first welding station 9 for welding the tin ring 102 to the first end of the fuse to seal one end of the ceramic tube body; a flipping station 10, including a flipping mechanism and a clamp fixed to the flipping mechanism, for flipping the fuse so that the open end of the ceramic tube body faces upward; a sand filling station 11 for filling sand into the ceramic tube body; a second tin ring feeding station 12, including another tin ring forming device for placing another tin ring 102 at the second end of the fuse; and a second welding station 13 for welding the tin ring 102 to the second end of the fuse to seal the other end of the ceramic tube body. The specific principle is as follows: The ceramic tube feeding station 6 continuously conveys the ceramic tube body; the melt wire threading station 7 inserts the melt body into the ceramic tube and fixes it; the tin ring forming device at the first tin ring feeding station 8 forms a tin ring 102 on-site and places it on the first end of the fuse; the first welding station 9 welds the tin ring 102 to seal one end of the ceramic tube; the flipping station 10 uses a flipping mechanism to hold the clamp and flip the fuse so that the open end faces upward; the sand filling station 11 fills the ceramic tube with arc-extinguishing sand; the other tin ring forming device at the second tin ring feeding station 12 forms and places the tin ring 102 at the second end of the fuse; the second welding station 13 welds and seals the other end, completing the finished fuse product. The tin ring forming device is directly embedded in the production line station, allowing tin ring 102 to be used immediately after production. This eliminates the intermediate storage, transportation, and feeding stages of tin ring 102, reducing the deformation and scrapping of thin-walled tin rings during turnover. Each station operates sequentially in an assembly line, completing the fuse from ceramic tube to finished product in one go, replacing traditional manual assembly, significantly improving efficiency and ensuring good product consistency. The process sequence of sealing at both ends ensures sufficient sand filling and reliable sealing. The arrangement of molten wire threading first and sand filling later meets the arc-extinguishing performance requirements of the fuse. Downstream of the molten wire threading station 7, a bending station can be set up to bend the molten body, thereby fixing the molten body inside the ceramic tube, or one end of the molten body is already bent, and the molten body itself is elastic, so it can be held inside the ceramic tube after being threaded.

[0064] The above are merely embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A tin ring forming apparatus, characterized in that, include: The feeding mechanism (1) is used to continuously release the tin wire (101). A tin ring forming mechanism (3) is used to form the tin wire (101) into a tin ring (102); the tin ring forming mechanism (3) includes: The support member (300) is vertically and flexibly disposed on one side of the solder wire (101); The carrier (300) has an outer peripheral profile that is adapted to the inner wall of the tin ring (102); The first forming component (301) includes a first driving device (3011) and a first mold (3012) connected to the output end of the first driving device (3011); the first mold (3012) has a first forming groove (3013) on the side facing the support member (300) that is adapted to the outer peripheral wall of the solder ring (102); the first driving device (3011) is used to drive the first mold (3012) to press the solder wire (101) against the outer periphery of the support member (300) and form the middle part of the solder wire (101) into an arc segment (1011); the two ends of the arc segment (1011) are connected to unformed segments (1012). A cutting device (304) is disposed opposite to the solder wire (101) for cutting off the unformed segment (1012) connected to the solder wire (101); The second forming component (302) includes a second driving device (3021) and a pair of grippers (3022) connected to the output end of the second driving device (3021) for gripping the two unformed segments (1012) and bending them inward and closing them together; The third forming component (303) includes a third driving device (3031) and a second mold (3032) connected to the output end of the third driving device (3031); the second mold (3032) has a second forming groove (3033) on the side facing the carrier (300) that is adapted to the outer peripheral wall of the tin ring (102); the third driving device (3031) is used to drive the second mold (3032) to press the two closed unformed segments (1012) against the outer periphery of the carrier (300) and form the tin ring (102) together with the arc segment (1011).

2. The tin ring forming apparatus according to claim 1, characterized in that: The tin ring forming device further includes a wire guiding mechanism (2), which includes two wire guiding wheels (201) that can rotate around their own axes respectively. At least one of the wire guiding wheels (201) is connected to the output end of a motor (206) so as to be driven to rotate by the motor (206). Both of the wire guiding wheels (201) have annular grooves on their circumferences, and the tin wire (101) is clamped between the two annular grooves.

3. The tin ring forming apparatus according to claim 2, characterized in that: The two guide wheels (201) are rotatably connected to a first slide block (202); the two first slide blocks (202) are slidably connected to the same slide rail (203), and an elastic reset member (204) is connected between the two first slide blocks (202) so that the solder wire (101) is elastically clamped between the two annular grooves.

4. The tin ring forming apparatus according to claim 3, characterized in that: The wire guiding mechanism (2) further includes a first wire guiding tube (2021), which is disposed between the feeding mechanism (1) and the wire guiding wheel (201) to guide the solder wire (101) into the annular groove; the first wire guiding tube (2021) is fixed on a first slide block (202); And / or, the wire guide mechanism (2) further includes: a second wire guide tube (205) disposed on one side of the wire guide wheel (201), and the second wire guide tube (205) extends in a straight line so that the solder wire (101) passes through and is straightened between the two wire guide wheels (201).

5. The tin ring forming apparatus according to claim 1, characterized in that: The first die (3012) has two inclined portions (3014) on the side facing the support member (300). The two inclined portions (3014) are respectively located on both sides of the opening of the first forming groove (3013), and the two inclined portions (3014) are inclined towards the outer periphery of the support member (300) so that when the first die (3012) presses the solder wire (101), the two inclined portions (3014) will respectively squeeze the two unformed segments (1012) inward and close together. And / or, the two inclined portions (3014) are inclined at the same degree and are arranged symmetrically.

6. The tin ring forming apparatus according to claim 1, characterized in that: The first die (3012) is further provided with a first limiting groove (30121) on the side facing the carrier (300); the first limiting groove (30121) extends along the conveying direction of the solder wire (101) and the first limiting groove (30121) passes through the first forming groove (3013); the inner wall of the first limiting groove (30121) is adapted to the outer periphery of the solder wire (101) so as to restrict the movement of the solder wire (101) in the vertical direction when the first die (3012) presses the solder wire (101); And / or, the second die (3032) is further provided with a second limiting groove (30321) on the side facing the carrier (300); the second limiting groove (30321) extends along the conveying direction of the solder wire (101) and the second limiting groove (30321) passes through the second forming groove (3033); the inner wall of the second limiting groove (30321) is adapted to the outer periphery of the solder wire (101) so as to restrict the movement of the solder wire (101) in the vertical direction when the second die (3032) presses the solder wire (101); And / or, each of the pair of grippers (3022) has a first groove (30221) on its opposite sides, the first groove (30221) extending in the horizontal direction, for restricting the two unshaped segments (1012) from moving in the vertical direction during the process of clamping the two unshaped segments (1012) together inward; And / or, each of the pair of grippers (3022) has a second groove (30222) on its side facing the carrier (300), the second groove (30222) is connected to the first groove (30221) to form an L-shaped groove structure, which is used to restrict the two unformed segments (1012) from moving in the vertical direction before their ends abut against each other.

7. The tin ring forming apparatus according to claim 1, characterized in that: The cutting device (304) includes a cutter disposed above the solder wire (101) conveying path, the cutter being connected to the output end of a linear drive device to cut the solder wire (101); And / or, a mating seat (305) is provided on one side of the carrier (300), the mating seat (305) is connected to the output end of the horizontal drive device (3051), the horizontal drive device (3051) is connected to the output end of the vertical drive device (3052); the mating seat (305) has one or two cutting edges (3041) on the side facing the carrier (300), the first drive device (3011) is used to drive the first die (3012) to press the two unformed segments (1012) against the mating seat (305), and cut the unformed segments (1012) connected to the solder wire (101) to a fixed length through the cutting edges (3041).

8. The tin ring forming apparatus according to claim 1, characterized in that: The tin ring forming device further includes a ring taking mechanism (4), which includes a telescopic drive device (401) and a lifting platform (402) connected to the output end of the telescopic drive device (401); the telescopic drive device (401) drives the lifting platform (402) to move along the extension direction of the carrier (300) to take out the tin ring (102).

9. A tin ring forming apparatus according to claim 8, characterized in that: The tin ring forming device further includes: a conveying mechanism (5) for conveying the tin ring (102) on the lifting platform (402) to one end of the fuse; the conveying mechanism (5) includes a clamping device (501) fixed to the output end of a telescopic device (502); the telescopic device (502) is fixed to the second slide (504) of a straight module (503) to convey the tin ring (102) to the welding station.

10. An automated fuse production line, characterized in that, The automatic fuse production line includes the tin ring forming apparatus as described in any one of claims 1-9; the automatic fuse production line further includes, in sequence: The ceramic tube feeding station (6) is used for continuous conveying of the ceramic tube body; The melt threading station (7) is used to thread the melt body into the ceramic tube body; The first tin ring feeding station (8) includes a tin ring forming device for placing a tin ring (102) at the first end of the fuse; The first welding station (9) is used to weld the tin ring (102) to the first end of the fuse to seal one end of the ceramic tube body; The flipping station (10) includes a flipping mechanism and a clamp fixed on the flipping mechanism, for flipping the fuse so that the open end of the ceramic tube body faces upward; Sand filling station (11) is used to fill the ceramic tube body with sand; The second tin ring feeding station (12) includes another tin ring forming device for placing another tin ring (102) at the second end of the fuse; The second welding station (13) is used to weld the tin ring (102) to the second end of the fuse to seal the other end of the ceramic tube body.

Images