Full-automatic production equipment and method for patch fuses

Abstract

The invention discloses full-automatic production equipment and a full-automatic production method for a patch fuse. The equipment comprises a turntable, and a pipe body assembly feeding mechanism, a threading mechanism, a first welding mechanism, a turnover mechanism, a first weighing mechanism, a sand filling mechanism, a second weighing mechanism, a second welding mechanism, a length detection mechanism and a discharging mechanism which are sequentially arranged around the turntable. A first height correction mechanism and a second length detection mechanism are arranged, so that the uniform feeding height of the pipe body assembly and the accurate penetration length of the fuse wire are guaranteed; the first welding mechanism and the second welding mechanism with the swinging wire feeding function are adopted, and the first repairing mechanism and the second repairing mechanism are combined to mill welding spots, so that it is ensured that the welding area ratio is stable, and the end face is flat; the sand filling amount is accurately controlled through the first weighing mechanism and the second weighing mechanism. Full-automatic precision production of the patch fuses is achieved, the technical problems that the length precision of products is poor, the welding quality is not stable and the sand filling amount is not accurate are effectively solved, and the consistency and reliability of the products are remarkably improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fuse manufacturing, and particularly relates to a full-automatic production device and method for a chip fuse. BACKGROUND

[0002] As a key circuit protection component, the performance reliability and consistency of the chip fuse are directly related to the safety of the electrical equipment. The core manufacturing process of such a fuse mainly includes the steps of inserting a fuse into a ceramic tube body with copper caps at both ends, welding the fuse and the copper cap at the end to form an electrical connection, and partially filling quartz sand and other arc extinguishing media in the tube body. Among them, the final length size of the fuse and the welding quality of the fuse and the copper cap are the two most critical parameters that determine whether the fuse can work safely and reliably. If the length accuracy is insufficient, the product may not be installed or the contact may be poor after installation; if the welding area is insufficient or there is a virtual weld, the contact resistance will be increased, causing abnormal heating, and the solder overflow may change the fuse characteristics, both of which will seriously affect the safety protection function of the product.

[0003] At present, automatic equipment with a rotating disc structure has appeared in the industry to realize the continuous production of chip fuses. For example, the prior art patent CN217387027U discloses an SMD fuse external welding machine. The device integrates multiple mechanisms such as feeding, length measurement, wire insertion, high-frequency welding, visual detection, wire trimming, turning, sand filling, preheating, electrical testing, and discharging through the main rotating disc mechanism, realizing the automation of the production process. However, through in-depth analysis, the prior art still has obvious limitations: Firstly, the length size control means, which is crucial to the quality of the final product, is relatively single and lagging. Only length measurement mechanisms are provided at the beginning and end of the production process, and there is a lack of mechanisms for real-time correction and intermediate control of key links that cause length errors (such as tube body feeding positioning height and welding point protrusion height after welding) during the production process.

[0004] Secondly, in the core welding process, the device uses traditional high-frequency welding combined with subsequent wire trimming, which fails to fundamentally solve the problems of solder accumulation, unstable welding area ratio, and internal porosity caused by poor solder feeding method during the welding process. Moreover, the trimming process is more of a passive repair of the formed and unqualified welding points, rather than active and precise control of the welding process itself.

[0005] Therefore, the prior art still cannot continuously and stably ensure the high standards of chip fuses in terms of length accuracy and welding connection quality while achieving efficient and automated production. There is an urgent need for a new production technology scheme that can precisely control key quality characteristics throughout the process. SUMMARY

[0006] The main purpose of the present application is to provide a kind of patch fuse full-automatic production equipment and method, by constructing integrated swing wire feeding welding, multi-stage height correction and closed-loop detection full-automatic production line, systematically solve the performance unreliable problem caused by length precision difference and welding area instability of patch fuse, finally realize the significant improvement of product consistency, safety and production efficiency.

[0007] The present application realizes the above-mentioned purpose by the following technical scheme: a kind of patch fuse full-automatic production equipment, including rotary table, a plurality of clamps of equiangular annularly arranged on the rotary table, pipe body assembly feeding mechanism, wire feeding mechanism, first welding mechanism, overturning mechanism, first weighing mechanism, sand filling mechanism, second weighing mechanism, second welding mechanism, first length detection mechanism and discharging mechanism sequentially arranged around the rotary table;Further comprising: First height correction mechanism and second length detection mechanism, sequentially arranged between the pipe body assembly feeding mechanism and the wire feeding mechanism, the first height correction mechanism corrects the height position of pipe body assembly on the clamp uniformity;Second length detection mechanism detects the incoming length of pipe body assembly; First visual detection mechanism, arranged between the wire feeding mechanism and the first welding mechanism, detects whether the two ends of fuse are correctly passed through pipe body assembly; First finishing mechanism, arranged between the first welding mechanism and the overturning mechanism, mills the welding protrusion of semi-finished product A end to set height; Fourth visual detection mechanism, arranged between the first welding mechanism and the second welding mechanism, detects the length of semi-finished product; Second height correction mechanism and second finishing mechanism, arranged between the second welding mechanism and the first length detection mechanism, the second height correction mechanism corrects the height position of fuse B end on the clamp uniformity;Second finishing mechanism mills the welding protrusion of fuse B end to set height.

[0008] Further, the first height correction mechanism includes first top rod and second top rod opposite up and down, first cylinder driving the first top rod downward movement and second cylinder driving the second top rod upward movement;The second height correction mechanism includes fourth cylinder located below the clamp and third top rod driven by the fourth cylinder to move up and down.

[0009] Further, the second length detection mechanism comprises a third support plate, a top end height limiting plate fixed on the third support plate and limiting the top end height position of the pipe body assembly on the clamp, a seventh cylinder fixed on the third support plate, a fourth support plate driven by the seventh cylinder to move up and down, a first elastic sensing top block elastically and floatingly arranged on the fourth support plate and pushing the pipe body assembly on the clamp upward so that the top end of the pipe body assembly abuts against the top end height limiting plate, and a first sensor fixed on the fourth support plate and sensing the position of the first elastic sensing top block; The first length detection mechanism comprises a seventh support plate, a bottom end height limiting plate fixed on the seventh support plate and limiting the bottom end height position of the pipe body assembly on the clamp, a fourteenth cylinder fixed on the seventh support plate, an eighth support plate driven by the fourteenth cylinder to move up and down, a second elastic sensing top block elastically and floatingly arranged on the eighth support plate and pushing the pipe body assembly on the clamp downward so that the bottom end of the pipe body assembly abuts against the bottom end height limiting plate, and a fourth sensor fixed on the eighth support plate and sensing the position of the second elastic sensing top block.

[0010] Further, the first trimming mechanism and the second trimming mechanism each comprise a sixteenth cylinder and a third cylinder, a first clamping jaw assembly driven by the sixteenth cylinder to move horizontally and clamp the pipe body assembly, a first support plate driven by the third cylinder to move up and down, a first driving member fixed on the first support plate, and a milling cutter driven by the first driving member to rotate around the Z axis and trim the welding surface of the fuse and the copper cap.

[0011] Further, a second visual detection mechanism is arranged between the first welding mechanism and the first trimming mechanism, and a third visual detection mechanism is arranged between the second welding mechanism and the second trimming mechanism; the second visual detection mechanism and the third visual detection mechanism detect the welding quality of the welding protrusions on both ends of the fuse.

[0012] Further, the clamp comprises two clamping plates and a first elastic member for driving the two clamping plates to keep a clamping state; the middle part of the clamping plate is rotationally arranged on the turntable, and the front end thereof extends radially outward beyond the turntable; the two clamping plates jointly enclose a clamping groove for clamping the pipe body assembly on the section extending beyond the turntable; a vertical rod is arranged vertically on one side of the two clamping plates close to the clamping groove, and the two ends of the first elastic member are hung on the vertical rod.

[0013] Further, the pipe body assembly loading mechanism, the overturning mechanism, the first weighing mechanism, the sand filling mechanism, the second weighing mechanism and the unloading mechanism are provided with an open clamp mechanism for opening the clamp; the open clamp mechanism comprises a second support plate, a fifth cylinder arranged on the second support plate, a rack horizontally moved along the radial direction of the turntable driven by the fifth cylinder, a rotating shaft arranged on the second support plate, a gear fixed on the rotating shaft and engaged with the rack, and an open clamp plate opened by the rotating shaft.

[0014] Further, the open clamp plate is arranged in a pair and fixed on the bottom of the rotating shaft, the two open clamp plates form a cam structure and the clamp is opened by a vertical rod acting on the clamp; the space between the two open clamp plates forms an avoiding passage for the vertical rod to rotate through.

[0015] Further, the pipe body assembly loading mechanism and the wire threading mechanism are provided with a detection module for detecting whether there is a copper cap at both ends of the pipe body assembly.

[0016] Further, the first welding mechanism and the second welding mechanism each comprise a welding wire feeding assembly, a wire feeding assembly for conveying the welding wire output by the welding wire feeding assembly at a set speed and timing, a welding gun for guiding the welding wire to reach the welding point position, a heating assembly aligned with the output end of the welding gun and heating the welding wire output by the welding gun, a second driving member for driving the welding gun to swing, and an air extraction assembly for extracting dust at the welding point position.

[0017] Further, the first welding mechanism further comprises a third jaw assembly for fixing the B end of the fuse when the fuse and the copper cap are welded.

[0018] Further, it further comprises a support plate between the wire threading mechanism and the first welding mechanism for supporting the bottom end of the fuse on the clamp.

[0019] Further, the first weighing mechanism and the second weighing mechanism each comprise a weigher below the clamp, a pair of guide clamps for preventing the product from falling during the process of the product falling to the weigher after the clamp is loosened, and a tenth cylinder for driving the pair of guide clamps to open or close; the upstream of the first weighing mechanism and the second weighing mechanism is provided with a third height correction mechanism for correcting the height position of the semi-finished product on the clamp.

[0020] Further, the sand filling mechanism is provided with at least two, and the filling of the quartz sand in the whole pipe body is completed in multiple times; the sand filling mechanism comprises a fifth clamping jaw assembly for clamping the semi-finished product, an eleventh air cylinder for driving the fifth clamping jaw assembly to reciprocate between the clamp and the sand filling position, a sand bucket located above the sand filling position, a twelfth air cylinder for driving the sand bucket to move up and down, a thirteenth air cylinder for driving the sand leakage plate at the bottom of the sand bucket to open or close the sand bucket, and a shaker located at the bottom of the sand filling position for high-frequency shaking of the semi-finished product on the fifth clamping jaw assembly.

[0021] Further, the fourth visual detection mechanism is arranged between the sand filling mechanism and the second weighing mechanism; the second weighing mechanism and the first length detection mechanism are provided with a gas blowing cooling device for cooling the welding protrusion on the surface of the copper cap at the B end of the fuse; and the first length detection mechanism and the blanking mechanism are provided with an electrical performance detection mechanism.

[0022] Another object of the present application is to provide a patch fuse production method, which is realized based on the full-automatic patch fuse production equipment as described above and comprises the following steps: S1, the pipe body assembly feeding mechanism supplies the pipe body assembly and carries it to the turntable, clamps and fixes it through the clamp, and the pipe body assembly rotates with the turntable to the next station; S2, the first height correction mechanism corrects the height position of the pipe body assembly on the clamp to a uniform state, and then rotates to the next station; S3, the second length detection mechanism detects whether the height position of the top end of the pipe body assembly meets the requirements, records the incoming length as L0, and then rotates to the next station; S4, the wire penetrating mechanism provides a fuse and penetrates the fuse into the pipe body assembly, and then rotates to the next station; S5, the first visual detection mechanism detects whether the fuse is correctly penetrated into the pipe body assembly, and then rotates to the next station; S6, the first welding mechanism welds the A end of the fuse and the copper cap at the A end of the pipe body assembly together to obtain a semi-finished product, and forms a welding protrusion at the A end of the semi-finished product, and then rotates to the next station; S7, the first trimming mechanism mills the welding protrusion at the A end of the semi-finished product to a set height, and then rotates to the next station; S8, the turnover mechanism turns over the semi-finished product on the clamp to realize the position exchange of the A end and the B end of the semi-finished product, and then rotates to the next station; S9, the first weighing mechanism detects the weight of the semi-finished product before sand filling, and then rotates to the next station; S10, the quartz sand filling in the pipe body is completed through the continuous passing of multiple sand filling mechanisms, and then rotates to the next station; S11, the fourth visual inspection mechanism detects the length of the semi-finished product as L1, calculates the height H1 of the soldering at one end as L1-L0, judges whether the height of the soldering at one end is qualified, and rotates to the next station again; S12, the second weighing mechanism detects the weight of the semi-finished product after sand filling, detects whether the sand filling weight meets the design requirement, and rotates to the next station again; S13, the second welding mechanism welds the copper cap at the B end of the fuse B end and the pipe body assembly B end together to obtain a fuse, and forms a welding protrusion at the B end of the fuse, and rotates to the next station again; S14, the second height correction mechanism corrects the height position of the top end of the fuse on the clamp, and rotates to the next station again; S15, the second finishing mechanism mills the welding protrusion at the B end of the fuse to a set height, and rotates to the next station again; S16, the first length detection mechanism detects the overall length of the fuse, records the length of the finished product as L2, calculates the height H2 of the soldering at the other end as L2-L1, judges whether the height of the soldering at the other end is qualified, and rotates to the next station again; S17, the blanking mechanism carries out separate blanking of defective products and good products according to the detection results in the previous process.

[0023] Compared with the prior art, the beneficial effects of the full-automatic production equipment and method of the patch fuse are that: by constructing a full-automatic production line integrated with swing wire feeding welding, multi-stage height correction and closed-loop length detection, the performance unreliable problem caused by length precision difference and unstable welding area of the patch fuse is systematically solved, and finally the product consistency, safety and production efficiency are significantly improved. Specifically: (1) effectively guarantee the size precision of the product: through the full-process, closed-loop size control chain composed of the first height correction mechanism, the second length detection mechanism, the first / second finishing mechanism and the first length detection mechanism, the pipe body assembly positioning, the fuse extension length, the welding protrusion height and the final finished product length are corrected and detected in multiple stages, which fundamentally guarantees the core size precision of the fuse, avoids the safety risks such as installation difficulty, poor contact or arc extinguishing failure caused by size deviation; (2) By innovatively introducing intermediate process detection and difference calculation logic, precise process control of the production quality of the fuse is realized. Specifically, a fourth visual detection mechanism is added after sand filling to measure the length (L1) of the semi-finished product after one-end welding, and the height (H1) of one-end soldering is calculated by the difference between the incoming length (L0), realizing independent real-time monitoring of the welding quality of the end; the difference between the final length (L2) of the finished product and L1 is used to calculate the height (H2) of the two-end soldering; this method completely changes the traditional mode of general judgment only by the final total length deviation, moves the quality control node forward, and enables the welding quality of both ends to be independently, accurately and traceably evaluated and controlled; it not only can intercept defects in the production process in advance and improve the yield, but also provides a reliable data basis for fine optimization of process parameters, realizing the leap from "result inspection" to "process intelligent control"; (3) The welding quality of the product is effectively guaranteed: the "swing wire feeding welding" technology is adopted, and the "visual detection" before and after welding and the precise "milling leveling repair" are matched, so that the inside of the welding point is dense, the shape is flat, and the area ratio is stable; defects such as virtual welding, pores and solder overflow are effectively eliminated, so that low resistance, stable and consistent electrical connection is obtained, and the accuracy of the fuse blowing characteristics and the reliability of long-term operation are guaranteed; (4) The quartz sand filling is dense and the filling amount is accurate: through the combination of "sand filling before / after weighing" and "visual filling detection", the accuracy and fullness of the quartz sand filling amount are ensured, which avoids the decline of arc extinguishing capacity caused by insufficient filling and prevents internal damage caused by excessive filling, and significantly improves the breaking capacity and safety of the product; (5) The production efficiency of the product is improved: multiple sand filling mechanisms are set to fill sand in batches, and the high-frequency shaking function is integrated, which effectively solves the bottleneck of sand filling efficiency caused by small perforation while ensuring the filling quality, and optimizes the production rhythm of the whole line; (6) The qualified rate of the product leaving the factory is improved: multiple sensors and visual systems are integrated to make real-time quality judgment (such as whether the copper cap exists, whether the fuse is correctly set, the welding quality of the copper cap at both ends, the length and electrical performance) during the production process, and finally the good and bad products are automatically sorted by the discharging mechanism, realizing 100% online detection and sorting and improving the qualified rate of the product leaving the factory. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a top view structural schematic diagram of an embodiment of the present application; Figure 2 is a structural schematic diagram of a fuse in an embodiment of the present application; Figure 3 is a structural schematic diagram of a clamp in an embodiment of the present application; Figure 4Structure schematic view of the feeding mechanism and the clip opening mechanism of the pipe body assembly in the embodiment of the present application; Figure 5 Structure schematic view of the rotating shaft and the clip opening plate in the embodiment of the present application; Figure 6 Structure schematic view of the rotating shaft, the movable sleeve and the clip opening plate in the embodiment of the present application; Figure 7 Structure schematic view of the first height correction mechanism in the embodiment of the present application; Figure 8 Structure schematic view of the detection module in the embodiment of the present application; Figure 9 Structure schematic view of the second length detection mechanism in the embodiment of the present application; Figure 10 Structure schematic view of the wire threading mechanism in the embodiment of the present application; Figure 11 Structure schematic view of the supporting plate and the first visual detection mechanism in the embodiment of the present application; Figure 12 Structure schematic view of the first welding mechanism in the embodiment of the present application; Figure 13 Local structure schematic view of the first welding mechanism in the embodiment of the present application; Figure 14 Structure schematic view of the first trimming mechanism in the embodiment of the present application; Figure 15 Structure schematic view of the overturning mechanism in the embodiment of the present application; Figure 16 Structure schematic view of the third height correction mechanism and the first weighing mechanism in the embodiment of the present application; Figure 17 Structure schematic view of the sand filling mechanism in the embodiment of the present application; Figure 18 Structure schematic view of the third height correction mechanism, the fourth visual detection mechanism and the second weighing mechanism in the embodiment of the present application; Figure 19 Structure schematic view of the second height correction mechanism, the third visual detection mechanism and the second trimming mechanism in the embodiment of the present application; Figure 20 Structure schematic view of the air blowing cooling device, the first length detection mechanism and the electrical performance detection mechanism in the embodiment of the present application; Figure 21 Structure schematic view of the blanking mechanism in the embodiment of the present application; Numerals in the figure represent: 100 - full-automatic production equipment for patch fuses 200 - fuse, 201 - tube body assembly, 2011 - tube body, 2012 - copper cap, 2013 - welding protrusion, 202 - fuse wire; 1 - rotating disc; 2 - clamp, 21 - clamping plate, 22 - clamping groove, 23 - first elastic member, 24 - vertical rod; 3 - tube body assembly feeding mechanism, 31 - vibration feeding module, 32 - second jaw assembly, 33 - sixth cylinder; 4 - wire feeding mechanism, 41 - wire feeding module, 42 - straightening module, 43 - pressing module, 44 - wire pulling module, 45 - wire cutting module, 46 - fifth support plate, 47 - eighth cylinder; 5 - first welding mechanism, 51 - welding wire feeding assembly, 52 - wire feeding assembly, 53 - welding gun, 54 - heating assembly, 55 - second driving member, 56 - air suction assembly, 57 - third jaw assembly, 58 - mounting seat, 59 - second elastic member; 6 - overturning mechanism, 61 - ninth cylinder, 62 - sixth support plate, 63 - rotating cylinder, 64 - fourth jaw assembly; 7 - first weighing mechanism, 71 - weighter, 72 - guide clamping plate, 73 - tenth cylinder, 74 - third height correction mechanism; 8 - sand filling mechanism, 81 - fifth jaw assembly, 82 - eleventh cylinder, 83 - sand hopper, 84 - twelfth cylinder, 85 - thirteenth cylinder, 86 - shaker; 9 - second weighing mechanism; 10 - second welding mechanism; 20 - first length detection mechanism, 210 - seventh support plate, 220 - bottom end height limiting plate, 230 - fourteenth air cylinder, 240 - eighth support plate, 250 - second elastic sensing top block, 260 - fourth sensor; 30 - blanking mechanism, 301 - first blanking module, 302 - second blanking module, 3011 - sixth clamping jaw assembly, 3012 - fifteenth air cylinder, 3013 - material receiving box; 40 - first height correction mechanism, 401 - first ejector rod, 402 - second ejector rod, 403 - first air cylinder, 404 - second air cylinder; 50 - second length detection mechanism, 501 - third support plate, 502 - top end height limiting plate, 503 - seventh air cylinder, 504 - fourth support plate, 505 - first elastic sensing top block, 506 - first sensor; 60 - first visual detection mechanism; 70 - first finishing mechanism, 701 - sixteenth air cylinder, 702 - third air cylinder, 703 - first clamping jaw assembly, 704 - first support plate, 705 - first driving member, 706 - milling cutter; 80 - second height correction mechanism, 801 - fourth air cylinder, 802 - third ejector rod; 90 - second finishing mechanism; 110 - second visual detection mechanism; 120 - third visual detection mechanism; 130 - clamping opening mechanism, 1301 - second support plate, 1302 - fifth air cylinder, 1303 - rack, 1304 - rotating shaft, 13041 - roller, 1305 - gear, 1306 - clamping opening plate, 1307 - movable sleeve, 13071 - sliding groove; 140 - detection module, 1401 - second sensor, 1402 - third sensor; 150 - support plate; 160 - fourth visual detection mechanism; 170 - air blowing cooling device, 180 - electrical performance detection mechanism, 1801 - conductive elastic sheet. DETAILED DESCRIPTION

[0025] EMBODIMENT Please refer to Figures 1-20The embodiment is a full-automatic production equipment 100 for a chip fuse, which is used for producing a fuse 200. The fuse 200 comprises a tube body assembly 201 and a fuse wire 202 inserted into the tube body assembly 201. The tube body assembly 201 comprises a tube body 2011 and copper caps 2012 arranged at both ends of the tube body 2011. The copper caps 2012 are provided with through holes (not shown in the figure) for the fuse wire 202 to pass through. The tube body 2011 is filled with quartz sand. The both ends of the fuse wire 202 are welded with the outer end faces of the corresponding copper caps 2012 to form welding protrusions 2013. In the production of the fuse 200, first, the both ends of the fuse wire 202 are inserted into the tube body assembly 201 and extend out of the copper caps 2012 by a set length. Then, one end of the fuse wire 202 is welded with the corresponding copper cap 2012, and the through hole in the copper cap 2012 is blocked. Then, the tube body 2011 is filled with quartz sand. Then, the other end of the fuse wire 202 is welded with the corresponding copper cap 2012, and the through hole in the copper cap 2012 is blocked. Thus, the fuse 200 is obtained.

[0026] In order to realize the automatic production of the fuse 200, please refer to Figure 1The full-automatic production equipment 100 of the patch fuse includes a rotating disc 1, a plurality of clamps 2 arranged on the rotating disc 1 at equal angles, a pipe body assembly feeding mechanism 3, a wire penetrating mechanism 4, a first welding mechanism 5, a turnover mechanism 6, a first weighing mechanism 7, a sand filling mechanism 8, a second weighing mechanism 9, a second welding mechanism 10, a first length detection mechanism 20 and a discharging mechanism 30 arranged in sequence around the rotating disc 1. The pipe body assembly feeding mechanism 3 supplies a pipe body assembly 201 and carries the pipe body assembly 201 to the rotating disc 1 and clamps and fixes the pipe body assembly 201 through the clamp 2. The rotating disc 1 rotates to the position of the wire penetrating mechanism 4, the wire penetrating mechanism 4 supplies a fuse 202 with a set length, and the fuse 202 is penetrated into the pipe body assembly 201 according to the set position requirement to obtain a semi-finished product. The semi-finished product rotates to the position of the first welding mechanism 5 with the rotating disc 1, the A end of the fuse 202 and the A end copper cap of the pipe body assembly 201 are welded together through the first welding mechanism 5. Then, the semi-finished product is rotated to the position of the turnover mechanism 6, the semi-finished product is turned over 180 degrees through the turnover mechanism 6, so that the B end of the pipe body assembly 201 faces upward. Then, the semi-finished product is rotated to the position of the first weighing mechanism 7, and the first weighing mechanism 7 weighs the semi-finished product before sand filling. Then, the semi-finished product is rotated to the position of the sand filling mechanism 8, and the sand filling mechanism 8 fills quartz sand in the pipe body 2011. Then, the semi-finished product is rotated to the position of the second weighing mechanism 9, and the second weighing mechanism 9 weighs the semi-finished product after sand filling, and then detects whether the quartz sand filling amount meets the requirement. Then, the semi-finished product is rotated to the position of the second welding mechanism 10, and the B end of the fuse 202 and the B end copper cap of the pipe body assembly 201 are welded together through the second welding mechanism 10 to obtain a fuse 200. Then, the fuse 200 is rotated to the position of the first length detection mechanism 20, and the first length detection mechanism 20 detects the length of the fuse 200. If the detection is qualified, the fuse is discharged as a qualified product at the position of the discharging mechanism 30, otherwise, the fuse is discharged as a defective product.

[0027] The length size of the patch fuse is one of the core parameters of the overall performance and safety of the fuse, which is directly related to whether the fault current can be safely cut off. If the fuse is too short, the electrode distance is too close, and the arc is easy to re-establish or cannot be completely extinguished. If the fuse is too long, it cannot be assembled into a fuse base with a set size. Therefore, the length size precision of the fuse needs to be strictly controlled and guaranteed in the manufacturing process.

[0028] In addition, the ratio of the soldering area of the fuse end to the copper cap to the area of the end face of the copper cap is also a very critical control parameter in the manufacturing process of the fuse, which is directly related to the quality, safety and reliability of the surface-mounted fuse. The fuse is electrically connected by the close contact between the outer surface of the copper cap and the electrical contact piece of the fuse seat. If the ratio is too small, the soldering is insufficient, resulting in weak connection, large resistance, serious heating and mechanical failure. If the ratio is too large, the soldering overflow will affect the external contact, possibly damage the tube body and change the critical fusing characteristics. Therefore, the control of the ratio of the soldering area of the fuse end to the copper cap to the area of the end face of the copper cap is also very important.

[0029] In order to solve the above problems of poor fuse length accuracy and unstable control of the ratio of the soldering area of the fuse end to the copper cap to the area of the end face of the copper cap, the full-automatic production equipment 100 for surface-mounted fuses is optimized and designed in the embodiment. Specifically: First, a first height correction mechanism 40 and a second length detection mechanism 50 are sequentially arranged between the tube assembly feeding mechanism 3 and the wire feeding mechanism 4.

[0030] When the tube assembly 201 is fed onto the clamp 2 on the turntable 1, its height position relative to the clamp 2 is not completely uniform, and in addition, the incoming length of the tube assembly 201 is also not completely uniform. Therefore, after the fuse 202 is fed into the tube assembly 201, the distance from the end A of the fuse 202 to the end face of the copper cap of the tube assembly 201A cannot be reliably guaranteed. When the height of the tube assembly 201 on the clamp 2 is lower than the set height position, after the fuse 202 is fed in, the length of the top end of the fuse 202 extending out of the tube assembly 201 is longer, and the other end is shorter. When the height of the tube assembly 201 on the clamp 2 is higher than the set height position, after the fuse 202 is fed in, the length of the top end of the fuse 202 extending out of the tube assembly 201 is shorter, and the other end is too long. When the one end of the fuse extending out is too long, the soldering area is too large during the subsequent soldering with the copper cap, which is easy to cause solder overflow or even climb onto the outer wall of the copper cap. When the one end of the fuse extending out is too short, the soldering area is easy to be insufficient during the subsequent soldering with the copper cap. Therefore, in order to guarantee that the lengths of both ends of the fuse 202 extending out of the copper cap after being fed into the tube assembly 201 meet the set requirements, and guarantee that the soldering area ratio meets the set requirements, the first height correction mechanism 40 and the second length detection mechanism 50 are sequentially arranged between the tube assembly feeding mechanism 3 and the wire feeding mechanism 4 in the embodiment. The first height correction mechanism 40 is used to correct the height position of the tube assembly 201 on the clamp 2 to be uniform. The second length detection mechanism 50 can detect the incoming length of the tube assembly 201, and record the detected incoming length as L0.

[0031] The first height correction mechanism 40 comprises a first top rod 401 and a second top rod 402 opposite to each other, a first cylinder 403 for driving the first top rod 401 to move downward, and a second cylinder 404 for driving the second top rod 402 to move upward. The first top rod 401 and the second top rod 402 are driven by the first cylinder 403 and the second cylinder 404 respectively to move upward and downward, so as to correct the pipe body assembly 201 to a set height position, thereby ensuring that the height positions of the pipe body assembly 201 on the clamp 2 are uniform and consistent.

[0032] The second length detection mechanism 50 comprises a third support plate 501, a top end height limiting plate 502 fixed on the third support plate 501 and limiting the top end height position of the pipe body assembly 201 on the clamp 2, a seventh cylinder 503 fixed on the third support plate 501, a fourth support plate 504 driven by the seventh cylinder 503 to move upward and downward, a first elastic sensing top block 505 elastically floating upward and downward on the fourth support plate 504 and pushing the pipe body assembly 201 on the clamp 2 upward so that the top end of the pipe body assembly 201 abuts against the top end height limiting plate 502, and a first sensor 506 fixed on the fourth support plate 504 and sensing the position of the first elastic sensing top block 505. The second length detection mechanism 50 performs closed-loop detection of the height position, thereby ensuring that the height position of the top end (i.e., the A end) of the pipe body assembly 201 before the wire insertion is correct, providing important reference data for subsequent calculation of the soldering height of the A end of the pipe body assembly, and laying an important foundation for subsequent welding area of the fuse and the copper cap to meet the set requirements.

[0033] Secondly, the first visual detection mechanism 60 is arranged between the wire insertion mechanism 4 and the first welding mechanism 5, and the first visual detection mechanism 60 obtains image information of the semi-finished product on the clamp 2 from the horizontal direction.

[0034] If the fuse 202 does not pass through the pipe body assembly 201, the subsequent welding with the copper cap cannot be performed, resulting in that the fuse 202 cannot be electrically connected with the external circuit through the copper cap end surface, and thus the overload fusing function cannot be performed. If the lengths of the two ends of the fuse 202 extending out of the two ends of the pipe body assembly 201 do not meet the requirements, the welding area of the fuse and the copper cap cannot be guaranteed. Therefore, in order to solve the above problems, the first visual detection mechanism 60 is used to detect whether the two ends of the fuse 202 pass through the pipe body assembly 201, and whether the lengths of the two ends of the fuse 202 extending out of the two ends of the pipe body assembly 201 meet the set length range. The first visual detection mechanism 60 performs closed-loop detection of the lengths of the two ends of the fuse extending out, thereby ensuring that the lengths of the two ends of the fuse extending out before the welding of the fuse 202 and the pipe body assembly 201 are correct, and further providing an important guarantee for the welding area of the fuse and the copper cap to meet the set requirements.

[0035] Thirdly, the first finishing mechanism 70 is arranged between the first welding mechanism 5 and the overturning mechanism 6.

[0036] After the fuse and the copper cap are welded, uneven distribution of the solder may cause unevenness on the surface of the welded structure, and the welding process itself may fluctuate, resulting in inconsistent soldering height, so that the total length of the fuse after welding is easy to exceed the tolerance range. The first trimming mechanism 70 is used to mill the surface of the welded structure of the fuse and the copper cap, on the one hand, to ensure that the fuse and the fuse seat clamping piece realize maximum area and close surface contact, so as to obtain low and stable contact resistance and ensure smooth current without abnormal heating; on the other hand, through high-precision milling of the welding height, the total length of the fuse can be accurately controlled within the set range. The first trimming mechanism 70 includes a sixteenth cylinder 701 and a third cylinder 702, a first clamping jaw assembly 703 driven by the sixteenth cylinder 701 to move horizontally and clamp the pipe body assembly 201, a first support plate 704 driven by the third cylinder 702 to move up and down, a first driving member 705 fixed on the first support plate 704, and a milling cutter 706 driven by the first driving member 705 to rotate around the Z axis and trim the surface of the fuse and the copper cap.

[0037] Fourthly, the fourth visual detection mechanism 160 is arranged after the first welding mechanism 5 and before the second welding mechanism 10, specifically, between the sand filling mechanism 8 and the second weighing mechanism 9.

[0038] The overall length of the semi-finished product is detected by the fourth visual detection mechanism 160, and the detected semi-finished product length is recorded as L1. The embodiment further includes a first calculation module and a first judgment module, the first calculation module calculates the one-end solder height H1=L1-L0 according to the semi-finished product length L1 fed back by the fourth visual detection mechanism 160 and the incoming material detection length L0 fed back by the second length detection mechanism 50; the first judgment module is configured to judge whether the one-end solder height H1 meets the solder height set range requirement, if yes, it is determined that the one-end solder height is qualified, otherwise, it is unqualified.

[0039] The first length detection mechanism 20 is arranged after the second welding mechanism 10, the overall length of the finished product is detected by the first length detection mechanism 20, and the finished product length is recorded as L2. The embodiment further includes a second calculation module and a second judgment module, the second calculation module calculates the two-end solder height H2=L2-L1 according to the finished product length L2 fed back by the first length detection mechanism 20 and the semi-finished product length L1 fed back by the fourth visual detection mechanism 160; the second judgment module is configured to judge whether the two-end solder height H2 meets the solder height set range requirement, if yes, it is determined that the one-end solder height is qualified, otherwise, it is unqualified.

[0040] The fourth visual detection mechanism 160 feeds back the length of the semi-finished product after the welding and finishing of one end, and the length of the semi-finished product when it is received. The height of the soldering of one end is obtained by difference calculation. Through the accurate detection of the height of the soldering of one end, independent and accurate monitoring of the height of the soldering of one end is realized. In addition, based on the length of the semi-finished product detected by the fourth visual detection mechanism 160, combined with the length of the finished product detected by the first length detection mechanism 20, the height of the soldering of the other end is obtained by difference calculation. Through the detection of the height of the soldering of the other end, independent and accurate monitoring of the height of the soldering of the other end is realized. Compared with the prior art which only uses the difference between the length of the finished product and the length of the incoming material to calculate the overall height of the soldering of one end and the soldering of the other end, the independent control of the height of the soldering of the fuse at both ends in the embodiment is more accurate and effective.

[0041] Fifth, the second height correction mechanism 80 and the second finishing mechanism 90 are sequentially arranged between the second welding mechanism 10 and the first length detection mechanism 20.

[0042] The second height correction mechanism 80 first corrects the height position of the fuse 200 on the clamp 2, providing a unified processing reference for the subsequent second finishing mechanism 90, and thus ensuring the accurate length of the finished fuse.

[0043] The second height correction mechanism 80 includes a fourth cylinder 801 located below the clamp 2 and a third top rod 802 driven by the fourth cylinder 801 to move up and down. The third top rod 802 pushes the fuse 200 upward from below to adjust the height position of the fuse 200 on the clamp 2, thereby ensuring the uniform height position of the fuse 200 on the clamp 2 and providing a unified processing reference for the second finishing mechanism 90 to mill the welding surface of the B end of the fuse 200B.

[0044] The second finishing mechanism 90 has the same structure as the first finishing mechanism 70. The second finishing mechanism 90 mills the welding surface of the B end of the fuse, which on the one hand ensures the maximum and close surface contact between the fuse and the fuse holder clamping piece, and on the other hand accurately controls the total length of the fuse within the set range.

[0045] The welding quality (e.g. whether there is underwelding or solder overflow) of the first welding mechanism 5 after welding the fuse A end and the copper cap of the pipe body assembly A end cannot be known; similarly, the welding quality of the second welding mechanism 10 after welding the fuse B end and the copper cap of the pipe body assembly B end cannot be known. Therefore, in order to guarantee the quality of the fuse, the second visual detection mechanism 110 is arranged between the first welding mechanism 5 and the first trimming mechanism 70, and the third visual detection mechanism 120 is arranged between the second welding mechanism 10 and the second trimming mechanism 90. In the embodiment, the third visual detection mechanism 120 is arranged above the second height correction mechanism 80, and the two share an operation station. In other embodiments, the third visual detection mechanism 120 can also be arranged upstream or downstream of the second height correction mechanism 80, occupying two operation stations. The second visual detection mechanism 110 and the third visual detection mechanism 120 obtain images of the semi-finished product from above, detect the welding quality of the fuse and the pipe body assembly, and further guarantee the welding quality.

[0046] Each clamp 2 comprises two clamping plates 21 and a first elastic member 23 for driving the two clamping plates 21 to maintain a clamping state. The middle part of the clamping plate 21 is rotationally arranged on the turntable 1, and the front end thereof extends radially outward beyond the turntable 1. The two clamping plates 21 jointly enclose a clamping groove 22 for clamping the pipe body assembly 201 on the section extending beyond the turntable 1. An upright stand 24 is arranged on one side of the two clamping plates 21 close to the clamping groove 22, and the two ends of the first elastic member 23 are hung on the stand 24 to drive the clamping groove 22 to maintain a clamping state.

[0047] Due to the process requirements of the pipe body assembly feeding mechanism 3, the turnover mechanism 6, the first weighing mechanism 7, the sand filling mechanism 8, the second weighing mechanism 9, and the discharging mechanism 30, the clamp 2 needs to switch between the open and clamping states. For example, when the pipe body assembly feeding mechanism 3 feeds the pipe body assembly 201, the clamp 2 needs to be in an open state first, and then switched to a clamping state after the pipe body assembly 201 is fed. The turnover mechanism 6 needs to be in an open state first, then the semi-finished product is taken out, turned over by 180 degrees, and then placed back into the clamp 2, which needs to be switched to a clamping state. Similarly, the first weighing mechanism 7, the sand filling mechanism 8, and the second weighing mechanism 9 all need to be in an open state first, then the semi-finished product is taken out for weighing or sand filling, and then placed back into the clamp 2, which needs to be switched to a clamping state. The discharging mechanism 30 needs to be in an open state first to take out the fuse 200 for discharging. Therefore, in order to meet the above functional requirements, an open clamp mechanism 130 is arranged at each station where the clamp 2 needs to be switched between the open and clamping states.

[0048] The opening mechanism 130 comprises a second support plate 1301, a fifth cylinder 1302 arranged on the second support plate 1301, a rack 1303 horizontally moving along the radial direction of the rotating disc 1 driven by the fifth cylinder 1302, a rotating shaft 1304 arranged on the second support plate 1301, a gear 1305 fixed on the rotating shaft 1304 and engaged with the rack 1303, and an opening plate 1306 driven by the rotating shaft 1304 to open the clamp 2.

[0049] In the embodiment, the opening plate 1306 is arranged in pairs and fixed on the bottom of the rotating shaft 1304, and the two opening plates 1306 form a cam structure and open the clamp 2 by acting on the vertical rod 24 of the clamp plate 21. The opening plate 1306 is at the same height space as the upper half of the vertical rod 24, and the cam structure formed by the two opening plates 1306 changes in diameter with the rotation of the rotating shaft 1304. When rotated to a certain angle, the diameter of the cam structure is the largest, which in turn acts on the vertical rod 24 to open the clamp 2. However, since the clamp 2 rotates with the rotating disc 1, the cam structure cannot interfere with the rotation of the vertical rod 24, so when the rotating shaft 1304 rotates with the cam structure to another certain angle, the space between the two opening plates 1306 can form an avoidance passage for the vertical rod 24 to rotate through.

[0050] In another embodiment, the opening plate 1306 can be fixed on a movable sleeve 1307, which is movably arranged on the outer periphery of the rotating shaft 1304. The outer periphery of the rotating shaft 1304 is provided with a roller 13041, and the inner wall surface of the movable sleeve 1307 is provided with a sliding groove 13071 matched with the roller 13041. The sliding groove 13071 extends circumferentially along the inner wall surface of the movable sleeve 1307 and has a height difference in the height direction. The fifth cylinder 1302 drives the horizontal movement of the rack 1303, which in turn drives the rotation of the rotating shaft 1304. The movable sleeve 1307 moves up and down under the cooperation of the roller 13041 and the sliding groove 13071, and in turn drives the opening plate 1306 to move up and down. The clamp 2 is opened by inserting the opening plate 1306 between the two clamp plates 21.

[0051] The pipe body assembly loading mechanism 3 comprises a vibration feeding module 31, a second clamp jaw assembly 32 receiving the end material output by the vibration feeding module 31, and a sixth cylinder 33 driving the horizontal movement of the second clamp jaw assembly 32.

[0052] Since there may be a small amount of copper cap missing phenomenon when the pipe body assembly 201 is delivered, in order to guarantee the integrity of the pipe body assembly 201, the detection module 140 is further arranged between the pipe body assembly feeding mechanism 3 and the wire passing mechanism 4. The detection module 140 includes a second sensor 1401 for detecting whether the A end of the pipe body assembly 201 has a copper cap, and a third sensor 1402 for detecting whether the B end of the pipe body assembly 201 has a copper cap. In the embodiment, the detection module 140 is located between the first height correction mechanism 40 and the second length detection mechanism 50.

[0053] The wire passing mechanism 4 includes a wire supply module 41, a straightening module 42 for straightening and stress relief of the output fuse of the wire supply module 41, a material pressing module 43 for pressing the fuse tail before the fuse is cut, a wire drawing module 44 for drawing the fuse to a set length along the conveying direction, and a wire cutting module 45 for cutting off the wire material tail after the fuse is passed in place. The straightening module 42, the material pressing module 43 and the wire drawing module 44 are arranged on a fifth support plate 46, and the fifth support plate 46 is driven by an eighth cylinder 47 to move up and down; by driving the fifth support plate 46 to move up and down through the eighth cylinder 47, the fuse 202 is passed into the pipe body assembly 201 to realize wire passing.

[0054] Since the welding area of the fuse and the copper cap needs to reach a set proportion of the end face of the copper cap, and most of the prior art adopts one-way wire feeding welding. When welding small and precise parts such as fuse and copper cap, if the welding wire continuously transports in one direction towards the welding point, it is easy to form a stacked welding point, resulting in uncontrollable shape of the welding protrusion 2013; the welding area is not suitable and inconsistent. Therefore, in order to solve the technical problem, the first welding mechanism 5 and the second welding mechanism 10 are optimized and designed. Specifically, the first welding mechanism 5 and the second welding mechanism 10 are the same in structure, and each includes a welding wire feeding assembly 51, a wire feeding assembly 52 for feeding the welding wire output by the welding wire feeding assembly 51 at a set speed and timing, a welding gun 53 for guiding the welding wire to the welding point position, a heating assembly 54 aligned with the output end of the welding gun 53 and heating the welding wire output by the welding gun 53, a second driving member 55 for driving the welding gun 53 to swing, and an air extraction assembly 56 for dust extraction at the welding point position. By driving the welding gun 53 to swing through the second driving member 55, the welding gun 53 is not stationary, but swings rapidly and slightly above the copper cap end face according to the preset trajectory (such as circular, arc, spiral, "8" shape, etc.). By controlling the amplitude, speed and wire feeding amount of the welding gun 53 swing, a welding protrusion 2013 with uniform thickness, slightly convex or flat surface can be accurately formed. This shape provides a perfect reference for the subsequent milling process, and only a very thin layer needs to be milled to obtain a perfect end face, ensuring the accuracy of the length and end face quality of the final product.

[0055] The first welding mechanism 5, when welding the fuse A end and the A end copper cap, due to the thermal stress and material tension, the fuse B end will appear a slight contraction towards the welding end, thus affecting the extension length of the fuse B end, and further affecting the welding protrusion area on the B end copper cap. In order to solve this technical problem, in the embodiment, the first welding mechanism 5 further comprises a third jaw assembly 57 for fixing the fuse B end when the fuse is welded with the copper cap.

[0056] The rotating end of the second driving member 55 is provided with a mounting seat 58, and the welding gun 53 is fixed on the mounting seat 58. The two sides of the mounting seat 58 are provided with a second elastic member 59 for driving the mounting seat 58 to reset. The second driving member 55 is used to realize the swing welding of the welding gun 53.

[0057] After the fuse 202 is inserted into the pipe body assembly 201, and before the A end of the fuse is welded with the copper cap, the fuse 202 may fall off from the pipe body assembly 201. In order to solve this technical problem, the embodiment further comprises a support plate 150 for supporting the bottom end of the fuse of the pipe body assembly 201 on the segment between the threading mechanism 4 and the first welding mechanism 5.

[0058] The turnover mechanism 6 comprises a ninth cylinder 61, a sixth support plate 62 driven by the ninth cylinder 61 to move along the radial direction of the rotating disc 1, a rotating cylinder 63 fixed on the sixth support plate 62, and a fourth jaw assembly 64 provided on the rotating end of the rotating cylinder 63. The fourth jaw assembly 64 is driven by the ninth cylinder 61 to realize the position switching of the semi-finished product between the clamp 2 and the rotating position, and the fourth jaw assembly 64 is driven by the rotating cylinder 63 to clamp the semi-finished product to realize the 180-degree turnover, that is, to realize the position replacement of the AB end of the semi-finished product.

[0059] The first weighing mechanism 7 and the second weighing mechanism 9 have the same structure and each comprises a weighing device 71 located below the clamp 2, a pair of guide clamping plates 72 for preventing the product from falling over during the falling process of the product to the weighing device 71 after the clamp 2 is released, and a tenth cylinder 73 for driving the pair of guide clamping plates 72 to open or close.

[0060] In order to prevent the semi-finished product from colliding with the weighing mechanism due to the too low height position of the semi-finished product on the clamp 2 when the semi-finished product comes to the first weighing mechanism 7 or the second weighing mechanism 9 for weighing, a third height correction mechanism 74 is arranged upstream of the first weighing mechanism 7 and the second weighing mechanism 9. The third height correction mechanism 74 has the same structure as the second height correction mechanism 80. In the embodiment, the fourth visual detection mechanism 160 and the third height correction mechanism 74 between the sand filling mechanism 8 and the second weighing mechanism 9 share one operation station.

[0061] Due to the very small diameter of the perforation on the copper cap 2012, the sand filling flow is small when filling sand into the pipe body 2011, which leads to low sand filling efficiency and affects the beat of the entire equipment. In order to solve this technical problem, three sand filling mechanisms 8 are arranged in the embodiment to complete the filling of quartz sand in the entire pipe body 2011 in three times. The sand filling mechanism 8 includes a fifth jaw assembly 81 for clamping the semi-finished product, an eleventh air cylinder 82 for driving the fifth jaw assembly 81 to reciprocate between the clamp 2 and the sand filling position, a sand hopper 83 located above the sand filling position, a twelfth air cylinder 84 for driving the sand hopper 83 to move up and down, a thirteenth air cylinder 85 for driving the sand leakage plate at the bottom of the sand hopper 83 to open or close the sand hopper 83, and a shaker 86 located at the bottom of the sand filling position for high-frequency shaking of the semi-finished product on the fifth jaw assembly 81. When the semi-finished product moves to the position of the sand filling mechanism 8, the opening mechanism 130 opens the clamp 2, and at the same time, the fifth jaw assembly 81 clamps the semi-finished product and moves to the sand filling position. The sand hopper 83 is lowered to align with the perforation on the copper cap, the thirteenth air cylinder 85 drives the sand leakage plate to open and close within a set time, and the sand hopper 83 fills sand in the pipe body 2011; during the sand filling process, the shaker 86 continuously shakes the semi-finished product at high frequency to ensure that the quartz sand in the pipe body 2011 is filled and full. In other embodiments, the sand filling mechanism 8 can also be provided with two or other quantities, mainly to realize multiple sand filling to improve production efficiency.

[0062] A gas blowing cooling device 170 is arranged between the second weighing mechanism 9 and the first length detection mechanism 20 to cool the welding protrusion 2013 on the surface of the copper cap at the end of the fuse 200B, so as to quickly cool the surface of the B-end copper cap, and facilitate reliable and effective detection results during subsequent electrical performance detection.

[0063] The first length detection mechanism 20 includes a seventh support plate 210, a bottom end height limiting plate 220 fixed on the seventh support plate 210 and limiting the height position of the bottom end of the pipe body assembly 201 on the clamp 2, a fourteenth air cylinder 230 fixed on the seventh support plate 210, an eighth support plate 240 driven by the fourteenth air cylinder 230 to move up and down, a second elastic sensing top block 250 elastically floating up and down on the eighth support plate 240 and pushing the pipe body assembly 201 on the clamp 2 downward so that the bottom end of the pipe body assembly 201 abuts against the bottom end height limiting plate 220, and a fourth sensor 260 fixed on the eighth support plate 240 and sensing the position of the second elastic sensing top block 250. The overall length of the fuse 200 is detected by the first length detection mechanism 20 to ensure the quality of the products leaving the factory.

[0064] A pair of electrically-conductive elastic sheets 1801 are arranged opposite to each other, and an electric performance testing system (not shown in the figure) is electrically connected to the electrically-conductive elastic sheets 1801. When the fuse 200 rotates on the fixture 2 along with the rotating disc 1 and passes through the electric performance testing mechanism 180, the welding protrusions 2013 at the upper and lower ends of the fuse 200 are abutted against the electrically-conductive elastic sheets 1801 to realize electrical connection, and then the electric performance testing system tests the electric performance of the fuse 200.

[0065] The discharging mechanism 30 includes a first discharging module 301 for discharging defective products and a second discharging module 302 for discharging good products. The first discharging module 301 and the second discharging module 302 each include a sixth jaw assembly 3011 for taking the fuse 200 off the fixture 2, a fifteenth cylinder 3012 for driving the sixth jaw assembly 3011 to move horizontally, and a receiving box 3013 for receiving the fuse released by the sixth jaw assembly 3011.

[0066] The production method of the full-automatic production equipment 100 for the patch fuses according to the embodiment includes the following steps: S1. The tube assembly feeding mechanism 3 supplies the tube assembly 201 and carries it to the rotating disc 1, which is clamped and fixed by the fixture 2, and the tube assembly 201 rotates with the rotating disc 1 to the next station; S2. The first height correction mechanism 40 corrects the height position of the tube assembly 201 on the fixture 2 to a uniform state, and then rotates to the next station; S3. The detection module 140 detects whether there is a copper cap at both ends of the tube assembly 201, and then rotates to the next station; S4. The second length detection mechanism 50 detects whether the height position of the top end of the tube assembly 201 meets the requirements, and records the incoming length as L0, and then rotates to the next station; S5. The wire insertion mechanism 4 provides the fuse wire 202 and inserts it into the tube assembly 201, and then rotates to the next station; S6. The first visual detection mechanism 60 detects whether the fuse wire 202 is correctly inserted into the tube assembly 201, and then rotates to the next station; S7. The first welding mechanism 5 welds the copper cap at the A end of the tube assembly to the A end of the fuse wire, obtains a semi-finished product, and forms a welding protrusion 2013 at the A end of the semi-finished product, and then rotates to the next station; S8. The second visual detection mechanism 110 detects whether the welding protrusion 2013 at the A end of the semi-finished product meets the welding quality requirements, and then rotates to the next station; S9. The first trimming mechanism 70 mills the welding protrusion 2013 at the A end of the semi-finished product to a set height. S10, the turnover mechanism 6 turns over the semi-finished product on the clamp 2 by 180 degrees, realizes the position exchange of the A end and the B end of the semi-finished product, and rotates to the next station again; S11, the third height correction mechanism 74 corrects the height position of the semi-finished product on the clamp 2, and rotates to the next station again; S12, the first weighing mechanism 7 detects the weight of the semi-finished product before sand filling, and rotates to the next station again; S13, the semi-finished product passes through three sand filling mechanisms 8 in succession, and the quartz sand filling in the pipe body 2011 is completed, and rotates to the next station again; S14, the third height correction mechanism 74 corrects the height position of the semi-finished product on the clamp 2, and the fourth visual detection mechanism 160 detects the length L1 of the semi-finished product, calculates the one-end soldering height H1=L1-L0, and judges whether the one-end soldering height is qualified, and rotates to the next station again; S15, the second weighing mechanism 9 detects the weight of the semi-finished product after sand filling, detects whether the sand filling weight meets the design requirement, and rotates to the next station again; S16, the second welding mechanism 10 welds the copper cap at the B end of the pipe body assembly B end and the fuse wire B end together, obtains the fuse 200, and forms the welding protrusion 2013 at the B end of the fuse 200, and rotates to the next station again; S17, the third visual detection mechanism 120 detects whether the welding protrusion 2013 at the B end of the fuse 200 meets the welding quality requirement, and the second height correction mechanism 80 corrects the height position of the top end of the fuse 200 on the clamp 2, and rotates to the next station again; S18, the second finishing mechanism 90 performs milling operation on the welding protrusion 2013 at the B end of the fuse 200, and mills the welding protrusion 2013 to a set height, and rotates to the next station again; S19, the air blowing cooling device 170 cools the welding protrusion 2013 on the surface of the copper cap at the B end of the fuse 200, and rotates to the next station again; S20, the first length detection mechanism 20 detects the overall length size of the fuse 200, records the product length L2, calculates the two-end soldering height H2=L2-L1, judges whether the two-end soldering height is qualified, and rotates to the next station again; S21, the electrical performance detection mechanism 180 tests the electrical performance of the fuse 200, and rotates to the next station again; S22, the blanking mechanism 30 respectively blanks the defective product and the good product according to the detection result in the previous process.

[0067] For those skilled in the art, without departing from the inventive concept, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A fully automated production equipment for surface mount fuses, comprising a turntable, a plurality of clamps arranged in a ring at equal angles on the turntable, a tube assembly feeding mechanism, a wire threading mechanism, a first welding mechanism, a flipping mechanism, a first weighing mechanism, a sand filling mechanism, a second weighing mechanism, a second welding mechanism, a first length detection mechanism, and a unloading mechanism arranged sequentially around the turntable; characterized in that, Also includes: A first height correction mechanism and a second length detection mechanism are sequentially arranged between the tube assembly feeding mechanism and the wire threading mechanism. The first height correction mechanism corrects the uniform height position of the tube assembly on the fixture; the second length detection mechanism detects the incoming length of the tube assembly. The first visual inspection mechanism is located between the wire threading mechanism and the first welding mechanism to detect whether the two ends of the molten wire pass through the tube assembly correctly. The first finishing mechanism is located between the first welding mechanism and the flipping mechanism, and mills the welding protrusion at end A of the semi-finished product to a set height; The fourth visual inspection mechanism is located between the first welding mechanism and the second welding mechanism to inspect the length of the semi-finished product; The second height correction mechanism and the second trimming mechanism are located between the second welding mechanism and the first length detection mechanism. The second height correction mechanism corrects the height position of the fuse B end on the fixture to be uniform; the second trimming mechanism mills the welding protrusion of the fuse B end to a set height.

2. The fully automated production equipment for surface mount fuses as described in claim 1, characterized in that, The first height correction mechanism includes a first push rod and a second push rod that are vertically opposite each other, a first cylinder that drives the first push rod to move downward, and a second cylinder that drives the second push rod to move upward; the second height correction mechanism includes a fourth cylinder located below the clamp and a third push rod that is driven by the fourth cylinder to move up and down.

3. The fully automated production equipment for surface mount fuses as described in claim 1, characterized in that, The second length detection mechanism includes a third support plate, a top height limiting plate fixed on the third support plate and limiting the top height position of the tube assembly on the clamp, a seventh cylinder fixed on the third support plate, a fourth support plate driven by the seventh cylinder to move up and down, a first elastic sensing block elastically floating on the fourth support plate and pushing the tube assembly on the clamp upward so that the top of the tube assembly abuts against the top height limiting plate, and a first sensor fixed on the fourth support plate and sensing the position of the first elastic sensing block. The first length detection mechanism includes a seventh support plate, a bottom height limiting plate fixed on the seventh support plate and limiting the bottom height position of the tube assembly on the clamp, a fourteenth cylinder fixed on the seventh support plate, an eighth support plate driven by the fourteenth cylinder to move up and down, a second elastic sensing block elastically floating on the eighth support plate and pushing the tube assembly on the clamp downward so that the bottom end of the tube assembly abuts against the bottom height limiting plate, and a fourth sensor fixed on the eighth support plate and sensing the position of the second elastic sensing block.

4. The fully automated production equipment for surface mount fuses as described in claim 1, characterized in that, Both the first and second repair mechanisms include a sixteenth cylinder and a third cylinder, a first gripper assembly that moves horizontally driven by the sixteenth cylinder and clamps the tube assembly, a first support plate that moves vertically driven by the third cylinder, a first drive member fixed on the first support plate, and a milling cutter that rotates around the Z-axis driven by the first drive member and repairs the welding surface of the fuse and the copper cap.

5. The fully automated production equipment for surface mount fuses as described in claim 1, characterized in that, It also includes a second visual inspection mechanism disposed between the first welding mechanism and the first repair mechanism, and a third visual inspection mechanism disposed between the second welding mechanism and the second repair mechanism; the second visual inspection mechanism and the third visual inspection mechanism inspect the welding quality of the weld protrusions at both ends of the fuse.

6. The fully automated production equipment for surface mount fuses as described in claim 1, characterized in that, The clamp includes two clamping plates and a first elastic element that drives the two clamping plates to maintain a clamping state; the middle part of the clamping plate is rotatably mounted on the turntable, and its front end extends radially outward beyond the turntable. The two clamping plates together form a clamping groove for clamping the tube assembly in the section that protrudes beyond the turntable; a vertically mounted upright is provided on one side of the two clamping plates near the clamping groove, and both ends of the first elastic element are hung on the upright.

7. The fully automated production equipment for surface mount fuses as described in claim 6, characterized in that, The loading mechanism, the flipping mechanism, the first weighing mechanism, the sand filling mechanism, the second weighing mechanism, and the unloading mechanism are all equipped with a clamping mechanism for opening the clamp. The clamping mechanism includes a second support plate, a fifth cylinder mounted on the second support plate, a rack driven by the fifth cylinder to move horizontally along the radial direction of the turntable, a rotating shaft mounted on the second support plate, a gear fixed on the rotating shaft and meshing with the rack, and a clamping plate driven by the rotation of the rotating shaft to open the clamp.

8. The fully automated production equipment for surface mount fuses as described in claim 7, characterized in that, The clamping plates are provided in pairs and fixed to the bottom of the rotating shaft. The two clamping plates form a cam structure and the clamp is opened by the uprights acting on the clamping plates. The space between the two clamping plates forms an avoidance passage to allow the uprights to rotate through.

9. The fully automated production equipment for surface mount fuses as described in claim 1, characterized in that, A detection module is provided between the tube assembly feeding mechanism and the wire threading mechanism to detect whether there are copper caps at both ends of the tube assembly.

10. The fully automated production equipment for surface mount fuses as described in claim 1, characterized in that, Both the first welding mechanism and the second welding mechanism include a welding wire feeding assembly, a wire feeding assembly that feeds the welding wire output from the welding wire feeding assembly at a set speed and timing, a welding torch that guides the welding wire to the welding point, a heating assembly that aligns with the output end of the welding torch and heats the welding wire output from the welding torch, a second driving component that drives the welding torch to perform oscillating welding, and a dust extraction assembly that aligns with the welding point to extract dust.

11. The fully automated production equipment for surface mount fuses as described in claim 10, characterized in that, The first welding mechanism also includes a third gripper assembly that fixes end B of the fuse when welding the fuse to the copper cap.

12. The fully automated production equipment for surface mount fuses as described in claim 1, characterized in that, It also includes a support plate in the section between the wire threading mechanism and the first welding mechanism that supports the bottom fuse of the tube assembly on the fixture.

13. The fully automated production equipment for surface mount fuses as described in claim 1, characterized in that, Both the first weighing mechanism and the second weighing mechanism include a weighing device located below the clamp, a pair of guide plates to prevent the product from tipping over as it falls onto the weighing device after the clamp is released, and a tenth cylinder to drive the pair of guide plates to open or close; both the first weighing mechanism and the second weighing mechanism have a third height correction mechanism upstream of them to correct the height position of the semi-finished product on the clamp.

14. The fully automated production equipment for surface mount fuses as described in claim 1, characterized in that, The sand filling mechanism is provided with at least two parts, which complete the filling of the entire tube with quartz sand in multiple stages. The sand filling mechanism includes a fifth gripper assembly for holding the semi-finished product, an eleventh cylinder for driving the fifth gripper assembly to reciprocate between the clamp and the sand filling position, a sand hopper located above the sand filling position, a twelfth cylinder for driving the sand hopper to move up and down, a thirteenth cylinder for driving the sand hopper bottom leakage plate to open or close the sand hopper, and a vibrator located at the bottom of the sand filling position to vibrate the semi-finished product on the fifth gripper assembly at high frequency.

15. The fully automated production equipment for surface mount fuses as described in claim 1, characterized in that, The fourth visual inspection mechanism is located between the sand filling mechanism and the second weighing mechanism; an air-blowing cooling device is provided between the second weighing mechanism and the first length inspection mechanism to cool the welding protrusion on the surface of the copper cap at the B end of the fuse; an electrical performance inspection mechanism is provided between the first length inspection mechanism and the unloading mechanism.

16. A method for manufacturing a surface mount fuse, characterized in that, The fully automated production equipment for surface mount fuses as described in claim 1 is used, and includes the following steps: S1. The tube assembly feeding mechanism supplies tube assemblies and transports them to the turntable, where they are clamped and fixed by a fixture. The tube assembly rotates with the turntable to the next station. S2. The first height correction mechanism corrects the height position of the tube assembly on the fixture to a uniform state, and then rotates it to the next station. S3. The second length detection mechanism detects whether the height position of the top of the tube assembly meets the requirements, records the incoming length as L0, and then rotates to the next station. S4. The wire threading mechanism provides the molten wire and threads it into the tube assembly before rotating it to the next station. S5. The first vision inspection mechanism checks whether the fuse is correctly inserted into the tube assembly, and then rotates to the next station; S6. The first welding mechanism welds the A end of the fuse to the copper cap at the A end of the tube assembly to obtain a semi-finished product, and forms a welding protrusion at the A end of the semi-finished product before rotating it to the next station. S7. The first finishing mechanism mills the welding protrusion on end A of the semi-finished product to the set height, and then rotates it to the next station. S8. The flipping mechanism flips the semi-finished product on the fixture to exchange the positions of end A and end B of the semi-finished product, and then rotates it to the next station. S9. The first weighing mechanism weighs the semi-finished product before filling it with sand, and then rotates it to the next station. S10. The tube is continuously filled with quartz sand through multiple sand filling mechanisms, and then rotated to the next station. S11. The fourth vision inspection mechanism inspects the length of the semi-finished product as L1, calculates the solder height at one end H1=L1-L0, determines whether the solder height at one end is qualified, and then rotates it to the next station. S12. The second weighing mechanism weighs the semi-finished product after it has been filled with sand to check whether the weight of the sand meets the design requirements, and then rotates it to the next station. S13. The second welding mechanism welds the B end of the fuse to the copper cap at the B end of the tube assembly to obtain a fuse, and forms a welding protrusion at the B end of the fuse before rotating it to the next station. S14. The second height correction mechanism corrects the height position of the top of the fuse on the fixture, and then rotates it to the next station. S15. The second repair mechanism mills the welding protrusion at the B end of the fuse to the set height, and then rotates it to the next station. S16. The first length inspection mechanism inspects the overall length of the fuse and records the finished product length as L2. It calculates the solder height at both ends H2=L2-L1, determines whether the solder height at both ends is qualified, and then rotates it to the next station. S17. The unloading mechanism unloads defective and good products separately based on the inspection results from the previous process.

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