Square fuse automatic assembly machine and square fuse automatic assembly method

Abstract

The present invention discloses an automatic square fuse assembly machine and method. The automatic assembly machine includes a machine platform equipped with a first conveyor, a second conveyor, a copper strip processing device, a single-sheet feeding device, a single-sheet bending device, a lower seat assembly device, a conveyor track, a hole enlarging device, a detection device, an upper cover assembly device, and a finished product conveying device. The copper strip processing device processes the copper strip into single copper sheets. The single-sheet feeding device conveys the single copper sheets processed by the copper strip processing device to the single-sheet bending device, which bends the single copper sheet into a U-shape at both sides of the middle portion to obtain a bent copper sheet. The lower seat assembly device installs the bent copper sheet on the lower seat to obtain a semi-finished product. The semi-finished product, which is pushed forward by the second conveyor along the conveyor track, is subjected to the hole enlarging, detection, and upper cover assembly processes respectively. The front end of the finished product conveying device receives the end of the conveyor track to output the finished product. The present invention has high assembly efficiency and low labor costs.

Description

Technical Field

[0001] The present invention relates to the technical field of fuse assembly, in particular to an automatic square fuse assembly machine and an automatic square fuse assembly method. Background Art

[0002] A fuse is a protective device that protects electronic devices from overcurrent and serious damage caused by internal faults. Therefore, a fuse is also called a fuse link and is defined in international standards as a "fuse element." It is an electrical component installed in a circuit to ensure safe operation. With the increasing miniaturization and integration of products, the shape and size of fuses have diverged significantly from traditional fuses. They can be categorized by structure as flat-plate fuses, blade fuses, square fuses, and surface-mount fuses. Square fuses consist of a copper sheet (the fuse element), a lower base, and an upper cover. The internal copper sheet has two terminals, which correspond to two holes in the bottom of the lower base. During installation, the copper sheet is mounted on the lower base, with the two terminals plugging into the two holes in the lower base. The copper sheet and the lower base are secured with a snap-fit ​​mechanism, and the upper cover is then installed on top of the lower base.

[0003] Currently, the assembly process of square fuses involves multiple steps that cannot be automatically and continuously coordinated. Some steps require manual operation of equipment. This assembly method not only leads to high labor intensity, but also results in low assembly efficiency and unstable quality of square fuses, resulting in high costs and reduced competitiveness. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a square fuse automatic assembly machine and a square fuse automatic assembly method.

[0005] In order to achieve the above objectives, the technical solution of the present invention is:

[0006] A square fuse automatic assembly machine includes a machine platform, which is equipped with a first conveying device, a second conveying device, a copper strip processing device, a single-piece feeding device, a single-piece bending device, an assembly lower seat device, a conveying track, a hole expanding device, a detection device, an assembly upper cover device and a finished product conveying device. The copper strip processing device processes the copper strip into a single copper sheet, the single-piece feeding device conveys the single copper sheet processed by the copper strip processing device to the single-piece bending device, which bends the single copper sheet into a U shape on both sides of the middle part to obtain a bent copper sheet, and the assembly lower seat device installs the bent copper sheet on the lower seat to obtain a semi-finished product, the hole expanding device, the detection device, and the assembly upper cover device are arranged in sequence along the conveying track, and respectively complete corresponding processes for the semi-finished product pushed forward by the second conveying device along the conveying track; the front end of the finished product conveying device receives the end of the conveying track to output the finished product.

[0007] In some embodiments, the single-sheet bending device includes a pressing cylinder, a support rod and a pressing piece. A groove is provided in the middle of the pressing rod. The support rod fixes the middle part of the single copper sheet. The pressing cylinder drives the pressing piece to move and bends the two sides of the middle part of the single copper sheet on the support rod downward to form two opposite terminals.

[0008] In some embodiments, the assembly lower seat device includes a first vibration plate for conveying the lower seat, a lower seat track connected to the output end of the first vibration plate, a lower seat lifting device, a U-shaped claw, a first sheet pressing cylinder, a limit cylinder, a pressing cylinder, a second sheet pressing cylinder and a copper sheet carrier; the lower seat lifting device lifts the lower seat transmitted from the first vibration plate and the lower seat track, the piston rod of the first sheet pressing cylinder faces downward, and is connected to the first sheet pressing seat; the copper sheet carrier is used to receive the bent copper sheet conveyed from the support rod, and when the copper sheet carrier is in Directly below the first sheet pressing seat, the U-shaped claw clamps the lower seat from the lower seat lifting device and transfers it to the bottom of the copper sheet carrier and fixes it. The first sheet pressing cylinder drives the first sheet pressing seat to press half of the terminal of the bent copper sheet into the lower seat. The limiting cylinder contracts to separate the copper sheet carrier from the bent copper sheet, and the pressing cylinder extends to press the bent copper sheet completely into the lower seat; the piston rod of the second sheet pressing cylinder faces downward and is connected to the second sheet pressing seat. The second sheet pressing cylinder drives the second sheet pressing seat to press the bent copper sheet completely into the lower seat to obtain a semi-finished product.

[0009] In some embodiments, the reaming device includes a primary reaming device and a secondary reaming device installed in sequence along the conveying direction of the second conveying device. The primary reaming device and the secondary reaming device both include a first fixed seat, a reaming piece and a reaming cylinder. The first fixed seat fixes the mounting end of the bent copper sheet in the semi-finished product, and the reaming cylinder drives the reaming piece to be inserted into the two holes at the bottom of the lower seat of the semi-finished product to reame the terminals of the bent copper sheet.

[0010] In some embodiments, the detection device includes a loosening detection mechanism, a sheet-mounting defective product sorting mechanism, a power-on detection mechanism, a power-on defective product sorting mechanism, a first visual detection mechanism and a first appearance defective product sorting mechanism, which are installed in sequence along the conveying direction of the second conveying device. The loosening detection mechanism includes a second fixed seat, two first probes and a first detection cylinder. The second fixed seat fixes the mounting end of the bent copper sheet in the semi-finished product, and the first detection cylinder drives the two first probes to insert into the two holes at the bottom of the lower seat of the semi-finished product to detect the tightness of the bent copper sheet and the lower seat. The sheet-mounting defective product sorting mechanism selects out the semi-finished products that are detected as defective by the loosening detection mechanism; the power-on detection mechanism includes a third fixed seat, two second probes and a second detection cylinder. The third fixed seat fixes the mounting end of the bent copper sheet in the semi-finished product, and the second detection cylinder drives the two second probes to insert into the two holes at the bottom of the lower seat of the semi-finished product to detect whether it is electrically conductive. The power-on defective product sorting mechanism selects out the semi-finished products that are detected as defective by the power-on detection mechanism; the first appearance defective product sorting mechanism selects out the semi-finished products that are detected as defective by the first visual detection mechanism.

[0011] In some embodiments, a cover delivery device is also included, and the cover assembly device includes a moving cylinder, an upper cover assembly cylinder and a negative pressure suction block. The moving cylinder is arranged on one side of the cover delivery device, and the piston rod of the upper cover assembly cylinder faces downward and is connected to the negative pressure suction block. The upper cover assembly cylinder is driven by the moving cylinder so that the negative pressure suction block sucks the upper cover from the cover delivery device and transports it to the upper cover assembly station corresponding to the semi-finished product. At the upper cover assembly station, the upper cover assembly cylinder is pressed downward to insert the upper cover sucked by the negative pressure suction block into the lower seat of the semi-finished product.

[0012] In some embodiments, after the upper cover device is assembled, a second visual inspection mechanism and a second appearance defective product sorting mechanism are further provided, and the second appearance defective product sorting mechanism selects out the semi-finished products that are defective when detected by the second visual inspection mechanism.

[0013] In some embodiments, the finished product conveying device includes a laser coding device and a finished product counting and blanking device. The laser coding device is arranged on the conveying track to receive and mark the products that have passed the second visual inspection mechanism and push them to the finished product counting and blanking device. The front end of the finished product counting and blanking device receives the conveying track and is provided with a counter. The rear end of the finished product counting and blanking device is provided with a discharge hopper, and a finished product collection box is provided under the discharge hopper.

[0014] In some embodiments, the second conveying device includes a first conveying component, a second conveying component and a third conveying component. The first conveying component transports the semi-finished products to the upper cover assembly station. The second conveying component is located on the rear side of the first conveying component. The second conveying component is used to convert the semi-finished products equipped with upper covers from a one-by-one pushing mode to a batch pushing mode of several together. The third conveying component is located on the rear side of the second conveying component and is used to push the semi-finished products equipped with upper covers in batches to the second visual inspection and subsequent stations.

[0015] In some embodiments, the copper strip processing device includes a tinning device, a tinning visual detection mechanism, a cleaning device, a drying device, and a copper sheet cutting device. The tinning device, the tinning visual detection mechanism, the cleaning device, the drying device, and the copper sheet cutting device are arranged in sequence along the conveying direction of the first conveying device, and respectively complete corresponding processes on the copper strip conveyed by the first conveying device.

[0016] In some embodiments, the first conveying device includes a turntable continuous belt feeding device, a shaping device and a positioning needle copper belt feeding device. The turntable continuous belt feeding device, the shaping device and the positioning needle copper belt feeding device are distributed in sequence along the conveying direction. The positioning needle copper belt feeding device is located between the tinning device and the tinning visual detection mechanism; the shaping device is located between the tinning device and the turntable continuous belt feeding device, and shapes the copper belt conveyed by the turntable continuous belt feeding device.

[0017] A square fuse automatic assembly method, using the square fuse automatic assembly machine as described above, includes the following steps:

[0018] 1) The first conveyor transports the copper strip to the copper strip processing device for processing to obtain a single copper sheet;

[0019] 2) The single-sheet feeding device conveys the copper sheet to the single-sheet bending device, and the single-sheet bending device bends the copper sheet into a U-shape at both sides of the middle portion to obtain a bent copper sheet;

[0020] 3) The bent copper sheet is mounted on the lower seat at the assembly lower seat device to obtain a semi-finished product, which is then pushed forward along the conveying track by the second conveying device to the reaming device and the testing device for reaming and testing;

[0021] 4) The second conveying device pushes the semi-finished product that has passed the hole expansion and inspection to the upper cover assembly station, and the upper cover assembly device inserts the upper cover into the lower seat of the semi-finished product;

[0022] 5) The finished product conveying device outputs the assembled finished products.

[0023] In some embodiments, in step 2, the single-sheet bending device first presses half of the terminal of the bent copper sheet into the lower seat, and then performs a secondary pressing to completely press the bent copper sheet into the lower seat.

[0024] In some embodiments, the hole expansion in step 3 uses a primary hole expansion device and a secondary hole expansion device to expand the semi-finished product twice, and the inspection in step 3 uses a loosening detection mechanism, a power-on detection mechanism and a first visual inspection mechanism to perform loosening detection, power-on detection and visual inspection on the semi-finished product respectively.

[0025] In some embodiments, step 1 also includes: using a tinning device to tin the copper strip, and visually inspecting the copper strip tinned by the tinning device through a tinning visual inspection device; cleaning the copper strip after tinning using a cleaning device and drying it using a drying device; step 3 also includes: using a defective product sorting mechanism to sort out semi-finished products that have failed the loosening detection mechanism, using a power-on defective product sorting mechanism to sort out semi-finished products that have failed the power-on detection mechanism, and using a first appearance defective product sorting mechanism to sort out semi-finished products that have failed the first visual inspection mechanism; step 4 also includes: using a second visual inspection mechanism to inspect the semi-finished product with the upper cover, and using the second visual inspection defective product sorting mechanism to sort out the semi-finished product with poor upper cover assembly.

[0026] In some embodiments, the second conveying device pushes the semi-finished products one by one to the upper cover assembly station, and pushes the semi-finished products equipped with upper covers in batches to the second visual inspection and subsequent stations.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The square fuse automatic assembly machine provided by the present invention can realize automated production of each processing step of square fuses, thereby greatly reducing manual labor intensity, improving assembly efficiency, and ensuring the assembly quality of square fuses.

[0029] (2) The present invention further sorts defective products produced during the assembly process through devices such as a loosening detection mechanism, a power-on detection mechanism, and a visual detection mechanism, ensuring that the finished products output by the finished product conveying device are all qualified products.

[0030] (3) The present invention adopts a single-piece bending device to bend a single copper sheet into a U-shape on both sides of the middle part to obtain a bent copper sheet, and presses half of the terminal of the bent copper sheet into the lower seat through an assembly lower seat device, and then presses it a second time to make the bent copper sheet completely installed in the lower seat. The assembly lower seat device can accurately install the bent copper sheet into the lower seat, with high assembly accuracy and reliable assembly.

[0031] (4) The second conveying device in the present invention can not only realize the step-by-step pushing of the semi-finished products, facilitating the completion of the corresponding processing steps, but also can convert the semi-finished products equipped with the upper cover from a one-by-one pushing mode to a batch pushing mode, facilitating the subsequent step-by-step pushing of the semi-finished products equipped with the upper cover to the subsequent workstations, thereby further improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0033] Figure 2 This is a structural schematic diagram of a turntable continuous belt feeding device of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0034] Figure 3 This is a structural schematic diagram of a positioning pin copper strip feeding device of a square fuse automatic assembly machine according to an embodiment of the present invention;

[0035] Figure 4 This is a structural schematic diagram of a shaping device of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0036] Figure 5 This is a structural schematic diagram of a tinning device of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0037] Figure 6 This is a structural diagram of a tinning visual inspection mechanism of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0038] Figure 7 This is a schematic structural diagram of a cleaning device for a square fuse automatic assembly machine according to an embodiment of the present invention;

[0039] Figure 8 This is a schematic structural diagram of a drying device of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0040] Figure 9 This is a schematic structural diagram of a copper strip cutting device of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0041] Figure 10 This is a structural schematic diagram of a single-piece feeding device of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0042] Figure 11 This is a schematic structural diagram of a single-piece bending device of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0043] Figure 12 This is a schematic diagram of the structure of the assembly device of the square fuse automatic assembly machine of the embodiment of the present invention. Figure I ;

[0044] Figure 13 This is a schematic diagram of the structure of the assembly device of the square fuse automatic assembly machine of the embodiment of the present invention. Figure II ;

[0045] Figure 14 This is a schematic diagram of the structure of the assembly device of the square fuse automatic assembly machine of the embodiment of the present invention. Figure III ;

[0046] Figure 15 This is a schematic diagram of the structure of the assembly device of the square fuse automatic assembly machine of the embodiment of the present invention. Figure IV ;

[0047] Figure 16 This is a schematic structural diagram of a hole enlarging device of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0048] Figure 17 This is a structural diagram of a loosening detection mechanism of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0049] Figure 18 This is a structural diagram of a defective piece sorting mechanism of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0050] Figure 19 This is a structural schematic diagram of a power-on detection mechanism of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0051] Figure 20 This is a structural schematic diagram of a first visual inspection mechanism of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0052] Figure 21 This is a schematic structural diagram of a cover delivery device and a cover assembly device of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0053] Figure 22 This is a schematic structural diagram of a second visual inspection mechanism of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0054] Figure 23 This is a schematic structural diagram of a second appearance defective product sorting mechanism of the square fuse automatic assembly machine according to an embodiment of the present invention;

[0055] Figure 24 This is a schematic structural diagram of a laser coding device for a square fuse automatic assembly machine according to an embodiment of the present invention;

[0056] Figure 25 This is a schematic structural diagram of a finished product counting and blanking device of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0057] Figure 26 This is a schematic structural diagram of a second conveying device of an automatic square fuse assembly machine according to an embodiment of the present invention;

[0058] Figure 27 This is a schematic structural diagram of a first conveying assembly of a square fuse automatic assembly machine according to an embodiment of the present invention;

[0059] Figure 28 This is a schematic structural diagram of a second conveying assembly of a square fuse automatic assembly machine according to an embodiment of the present invention;

[0060] Figure 29 This is a structural schematic diagram of the third conveying assembly of the square fuse automatic assembly machine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0061] The present invention is further explained below with reference to the accompanying drawings and specific embodiments. The drawings are provided for illustrative purposes only to facilitate understanding of the present invention, and their specific proportions may be adjusted according to design requirements. Those skilled in the art will understand that the vertical relationships between components and the definitions of front and back in the figures described herein refer to the relative positions of components. Therefore, they can be flipped to present the same components, and all such representations are within the scope of this specification.

[0062] refer to Figure 1-29 The present invention provides an automatic square fuse assembly machine, comprising a machine platform 30, on which are mounted a first conveying device, a second conveying device 28, a copper strip processing device, a single-piece feeding device 09, a single-piece bending device 10, an assembly lower seat device, a conveying track 40, a hole expanding device, a detection device, an assembly upper cover device, and a finished product conveying device. The copper strip processing device processes the copper strip into a single copper sheet, the single-piece feeding device 09 conveys the single copper sheet processed by the copper strip processing device to the single-piece bending device 10, which bends the single copper sheet into a U-shape at both sides of the middle part to obtain a bent copper sheet, and the assembly lower seat device installs the bent copper sheet on the lower seat to obtain a semi-finished product. The hole expanding device, the detection device, and the assembly upper cover device are sequentially arranged along the conveying track, and respectively complete corresponding processes for the semi-finished products pushed forward by the second conveying device 28 along the conveying track 40; the front end of the finished product conveying device receives the end of the conveying track to output the finished product.

[0063] In a specific embodiment, the copper strip processing device includes a tinning device 04, a tinning visual inspection mechanism 05, a cleaning device 06, a drying device 07, and a copper sheet cutting device 08. These tinning devices 04, 05, 06, 07, and 08 are sequentially arranged along the conveying direction of the first conveyor and perform corresponding processes on the copper strip conveyed by the first conveyor. The present invention also includes a controller (not shown), specifically a PLC controller, for controlling the coordinated actions of the various devices.

[0064] In a specific embodiment, the first conveying device includes a turntable continuous belt feeding device 01, a shaping device 02, and a positioning pin copper belt feeding device 03. The turntable continuous belt feeding device 01, the shaping device 02, and the positioning pin copper belt feeding device 03 are sequentially arranged along the conveying direction. The positioning pin copper belt feeding device 03 is located between the tinning device 04 and the tinning visual inspection mechanism 05. The shaping device 02 is located between the tinning device 04 and the turntable continuous belt feeding device 03 and shapes the copper belt conveyed by the turntable continuous belt feeding device 03. Specifically, the positioning pin copper belt feeding device 03 sequentially conveys the copper belt to the shaping station, the tinning station, the tinning visual inspection station, and the cleaning station.

[0065] In a specific embodiment, Figure 2 As shown, the turntable continuous belt feeding device 01 includes a first bracket 011, a turntable 012, a motor 013 and a clamping roller assembly 014. The turntable 012 and the motor 013 are both arranged on the first bracket 011, and the turntable 012 is driven by the motor 013. The clamping roller assembly 014 is located on the front side of the turntable 012. The clamping roller assembly 014 includes two parallel clamping rollers, and there is a gap between the two clamping rollers to facilitate the passage of the copper belt output from the turntable 012.

[0066] In a specific embodiment, Figure 3 As shown, the shaping device 02 includes a shaping cylinder 021 and a shaping block 022. The piston rod of the shaping cylinder 021 is vertically downward and connected to the shaping block 022. The middle position of the copper strip 50 is pressed and shaped by the shaping block 022 to avoid unevenness in the middle of the copper strip 50 and affect the quality.

[0067] In a specific embodiment, Figure 4As shown, the positioning needle copper strip feeding device 03 includes a copper strip support rail 031, a plurality of positioning needle assemblies 032, a conveying cylinder 034 and an ejector cylinder 035. The plurality of positioning needle assemblies 032 are arranged on a fixed plate 033 and are distributed and matched below the copper strip support rail 031 along the conveying direction; the conveying cylinder 034 is connected to the fixed plate 033, and the conveying cylinder 034 drives the fixed plate 033 to telescopically move along the length direction of the support rail; the ejector cylinder 035 is connected to the conveying cylinder 034, and the ejector cylinder 035 drives the conveying cylinder 034 and the fixed plate 033 to telescopically move along the up and down directions. The number of the positioning needle assemblies 032 is specifically two, and each positioning needle assembly 032 includes a needle plate 0321 and two rows of positioning needles arranged on the top surface of the needle plate 0321. The two rows of positioning needles are distributed on the left and right, and each row includes a number of positioning needles 0322 distributed along the conveying direction of the first conveying device, and the spacing between adjacent positioning needles is appropriate to the spacing between adjacent small holes on both sides of the copper belt 50, so that each positioning needle 0322 can pass through the corresponding small hole on the copper belt 50. The top of the positioning needle 0322 is conical, so that it can quickly pass through the corresponding small hole on the copper belt 50. During operation, the ejector cylinder 035 first lifts the conveying cylinder 034, the fixed plate 033, and the positioning pin assemblies 032, allowing the tops of the positioning pins 0322 of the two positioning pin assemblies 032 to pass through the corresponding small holes on the edge of the copper strip 50 and lift the copper strip 50. Then, the piston rod of the conveying cylinder 034 extends forward, pushing the fixed plate 033 and the positioning pin assemblies 032 forward, thereby moving the copper strip 50 forward a certain distance. Then, the piston rod of the ejector cylinder 035 retracts, causing the positioning pins 0322 to move downward and away from the copper strip 50. Then, the piston rod of the conveying cylinder 034 retracts, driving the fixed plate 033 and the positioning pin assemblies 032 to return to their original position. This cycle repeats, and the positioning pin copper strip feeding device 03 can achieve the step-by-step pushing process of the copper strip 50.

[0068] In a specific embodiment, Figure 5 As shown, the tinning device 04 includes an electric soldering iron 041, a tin feeding assembly (not shown in the figure), a tinning cylinder 042, a translation cylinder (not shown in the figure), and a second bracket 043 arranged on the machine 30. The translation cylinder (not shown in the figure) is horizontally arranged on the second bracket 043, and its piston rod is connected to the tinning cylinder 042 to drive the tin suction cylinder to move horizontally; the tinning piston rod is downward and connected to the electric soldering iron 041, the electric soldering iron 041 is vertically arranged, and its soldering iron head is downward; the tin feeding assembly is arranged on the second bracket 043 or the machine 30, and cooperates with the electric soldering iron 041.

[0069] In a specific embodiment, Figure 6As shown, the tinning visual inspection device 05 includes a first optical component 051 and a first support bracket 052. The first support bracket 052 supports the first optical component 051. The output of the first optical component 501 is connected to the controller. During operation, the tinning visual inspection device 05 continuously captures images of the copper strip after tinning and transmits them to the back-end controller for processing. If the copper strip lacks tinning several times in a row (the number of times is set according to actual needs), the controller controls the entire assembly machine to stop operation and issue an alarm, and the staff will conduct fault processing.

[0070] In a specific embodiment, Figure 7 As shown, the cleaning device 06 includes an ultrasonic cleaning box 061 and a box cover (not shown) connected to the top of the ultrasonic cleaning box 061. The two opposite side walls of the ultrasonic cleaning box 061 are respectively provided with a through hole 062 for the copper strip 50 to pass through. Figure 8 As shown, the drying device 07 includes a hot air blower 071 and a support platform 072 . The hot air blower 071 is disposed on the support platform 072 , and the air outlet of the hot air blower 071 faces the support platform 072 to perform hot air drying on the copper strip 50 passing through the support platform 072 .

[0071] In a specific embodiment, Figure 9 As shown, the cutting device 08 includes a cutting cylinder 081 and two cutters (not shown in the figure). The cutting cylinder 081 is set on the machine 30 through the knife holder 082, and the piston rod of the cutting cylinder 081 is facing and connected to the two cutters. The two cutters are used to cut the parts connected to the left and right ends of each copper sheet on the copper strip to obtain a single copper sheet. Figure 10 As shown, the single-chip feeding device 09 includes two ejectors (not shown in the figure), a first single-chip feeding cylinder 091 and a second single-chip feeding cylinder 092. The first single-chip feeding cylinder 091 is vertically arranged with its piston rod facing upward and connected to the two ejectors. The second single-chip feeding cylinder 092 is horizontally arranged and connected to the first single-chip feeding cylinder 091 to drive the first single-chip feeding cylinder 091 and the two ejectors to move. During operation, the piston rod of the first single-piece feeding cylinder 091 extends upward, so that the tops of the two ejectors pass through the copper sheet 60 at the cutting station and lift up the copper sheet 60. Then, the second single-piece feeding cylinder 092 is actuated to drive the two ejectors to move to the single-piece bending station (i.e., the support rod described below). At the assembly station of the lower seat, the piston rod of the first single-piece feeding cylinder 091 contracts downward, so that the two ejectors put down the copper sheet, leaving the copper sheet 60 at the assembly station of the lower seat. The second single-piece feeding cylinder 092 drives the first single-piece feeding cylinder 091 and the two ejectors to reset and transport the next copper sheet.

[0072] In a specific embodiment, Figure 11As shown, the single-piece bending device 10 includes a pressing cylinder 101, a support rod 102 and a pressing piece 103. A groove is provided in the middle of the pressing rod 103, and the opening of the groove is adapted to the bending part of the single copper sheet. The support rod 102 fixes the middle part of the single copper sheet. The pressing cylinder 101 drives the pressing piece 103 to move downward to bend the two sides of the middle part of the single copper sheet 70 on the support rod 102 to form two opposite terminals, thereby obtaining a bent copper sheet 70. Figure 12 and 13 As shown, the assembly lower seat device includes a first vibration plate 11 for conveying the lower seat, a lower seat track 111 connected to the output end of the first vibration plate, a lower seat lifting device 112, a U-shaped claw (not shown in the figure), a first pressing cylinder 13, a limit cylinder 12, a pressing cylinder 113, a second pressing cylinder 14 and a copper sheet carrier 114; the lower seat lifting device 112 will lift and fix the lower seat transmitted from the first vibration plate 11 and the lower seat track 12, and the piston rod of the first pressing cylinder 13 131 is downward and is connected to the first pressing seat 132; the copper sheet carrier 114 is used to receive the bent copper sheet 70 conveyed from the support rod 102. When the copper sheet carrier 114 is located directly below the first pressing seat 132, the U-shaped claw clamps the lower seat 80 from the lower seat lifting device 112 and transfers it to the bottom of the copper sheet carrier 114 and fixes it. The first pressing cylinder 13 drives the first pressing seat 132 to press half of the terminal of the bent copper sheet 70 into the lower seat 80. Figure 14 As shown. The limiting cylinder 12 contracts to separate the copper sheet carrier 114 from the bent copper sheet 70, and the pressing cylinder 113 extends to completely press the bent copper sheet 70 into the lower seat 80; Figure 15 As shown, the piston rod 141 of the second pressing cylinder 14 faces downward and is connected to the second pressing seat 142. The second pressing cylinder 14 drives the second pressing seat 142 to completely press the bent copper sheet 70 into the lower seat 80 to obtain a semi-finished product.

[0073] In a specific embodiment, Figure 16 As shown, the reaming device includes a primary reaming device 15 and a secondary reaming device 16 which are installed in sequence along the conveying direction of the second conveying device. The primary reaming device 15 and the secondary reaming device 16 have the same structure, and both include a first fixed seat 151, a reaming piece 152 and a reaming cylinder 153. The first fixed seat 151 fixes the mounting end of the bent copper sheet in the semi-finished product, and the reaming cylinder 153 drives the reaming piece to be inserted into the two holes at the bottom of the lower seat of the semi-finished product to reame the terminals of the bent copper sheet.

[0074] In a specific embodiment, the detection device includes a loosening detection mechanism 17, a loading defective product sorting mechanism 18, a power-on detection mechanism 19, a power-on defective product sorting mechanism 20, a first visual inspection mechanism 21 and a first appearance defective product sorting mechanism 22, which are sequentially installed along the conveying direction of the second conveying device. Figure 17 As shown, the loosening detection mechanism 17 includes a second fixing seat 171, two first probes 172 and a first detection cylinder 173. The second fixing seat 171 fixes the installation end of the bent copper sheet in the semi-finished product. The first detection cylinder 173 drives the two first probes 172 to insert into the two holes at the bottom of the lower seat of the semi-finished product to detect the tightness between the bent copper sheet and the lower seat. The defective sheet sorting mechanism 18 selects the semi-finished products that are detected as defective by the loosening detection mechanism 17. Figure 18 As shown, the defective sheet sorting mechanism 18 includes a first horizontal cylinder 181, a first vertical cylinder 182, a first clamping cylinder 183 and a first clamping claw 184. The first vertical cylinder 182 is connected to the first clamping claw 184 to drive the first clamping claw 184 to move up and down. The first horizontal cylinder 181 is connected to the first vertical cylinder 182 to drive the first vertical cylinder 182 and the first clamping claw 184 to move horizontally. When the loosening detection mechanism 17 detects that the bent copper sheet is poorly assembled with the lower seat, the assembly lower seat defective product sorting device 18 is started to clamp the defective lower seat assembly products. Figure 19 As shown, the power-on detection mechanism 19 includes a third fixing seat 191, two second probes 192 and a second detection cylinder 193. The third fixing seat 191 fixes the installation end of the bent copper sheet in the semi-finished product. The second detection cylinder 193 drives the two second probes to insert into the two holes at the bottom of the lower seat of the semi-finished product to detect whether it is electrically conductive. The power-on defective product sorting mechanism 20 selects the semi-finished products that are detected as defective by the power-on detection mechanism 19; the first appearance defective product sorting mechanism 22 selects the semi-finished products that are detected as defective by the first visual inspection mechanism 21. The principle and structure of the first appearance defective product sorting mechanism 22 and the power-on defective product sorting mechanism 20 are similar to those of the defective sheet sorting device 18 and will not be repeated here. Figure 20 As shown, the first visual inspection mechanism 21 includes a second optical assembly 211 and a second support bracket 212. The first support bracket 211 supports the first optical assembly 212, and the output of the first optical assembly 212 is connected to the controller. During operation, the first visual inspection mechanism 21 continuously captures images of semi-finished products and transmits them to the back-end controller for processing. Semi-finished products that fail the appearance inspection are then sorted out by the first appearance defective product sorting mechanism 22.

[0075] In a specific embodiment, Figure 21As shown, it also includes a cover delivery device 23, which includes a second vibration plate 231 for conveying the cover, an upper cover track 232 connected to the output end of the second vibration plate 231, and a receiving platform 233; the end of the upper cover track 232 is connected to the receiving platform 233 to transfer the upper cover to the receiving platform 233. The upper cover assembly device 24 includes a moving cylinder 241, an upper cover assembly cylinder 242 and a negative pressure suction block 243. The moving cylinder 241 is arranged on one side of the upper cover delivery device 23. The piston rod of the upper cover assembly cylinder 242 faces downward and is connected to the negative pressure suction block 243. The upper cover assembly cylinder 242 is driven by the moving cylinder 241 so that the negative pressure suction block 243 sucks the upper cover from the upper cover delivery device 23 and transports it to the upper cover assembly station corresponding to the semi-finished product. At the upper cover assembly station, the upper cover assembly cylinder 242 is pressed down to insert the upper cover sucked by the negative pressure suction block 243 into the lower seat of the semi-finished product. A second visual inspection mechanism 25 and a second appearance defective product sorting mechanism 26 are also provided after the upper cover assembly device 24. The second appearance defective product sorting mechanism 26 selects the semi-finished products that are defective when detected by the second visual inspection mechanism 25. Specifically, as Figure 22 As shown, the second visual detection mechanism 25 includes a third optical component 251 and a third support bracket 252, and the third optical component 251 is arranged on the third support bracket 252. Figure 23 As shown, the second visually defective product sorting mechanism 26 includes a second horizontal cylinder 261, a second vertical cylinder 262, and a clamping assembly 265 consisting of multiple first clamping cylinders 263 and first clamping jaws 264. The second vertical cylinder 262 is connected to the clamping assembly 265 to drive the first clamping jaws 264 to move up and down. The second horizontal cylinder 261 is connected to the second vertical cylinder 262 to drive the second vertical cylinder 262 and the clamping assembly 265 to move horizontally. When the second visual inspection mechanism 25 detects a defective upper cover assembly, it activates, picks up the defective upper cover assembly, and places it in the defective upper cover assembly collection box 164.

[0076] In a specific embodiment, Figure 24 and 25 As shown, the finished product conveying device includes a laser coding device 27 and a finished product counting and blanking device 29. The laser coding device 27 is arranged on the conveying track 40 to receive the qualified products detected by the second visual inspection mechanism 25, mark them and push them to the finished product counting and blanking device 29. The laser coding device 27 includes a laser 271 and a bracket 272. The front end of the finished product counting and blanking device 29 receives the conveying track 40 and is provided with a counter 291. The rear end of the finished product counting and blanking device 29 is provided with a lower hopper 292, and a finished product collection box 293 is provided below the lower hopper.

[0077] In a specific embodiment, Figure 26As shown, the second conveyor 28 includes a first conveyor assembly 281 for pushing the semi-finished products one by one, a second conveyor assembly 282 for converting the semi-finished products with upper covers from a one-by-one push mode to a batch push mode for several products, and a third conveyor assembly 283 for stepping the semi-finished products with upper covers to the second visual inspection station in batches and pushing the products forward after visual inspection. The three conveyors are arranged in sequence along the length of the conveyor track 40. The first conveyor assembly 281 transports the semi-finished products to the reaming station, the loosening detection station, the power-on detection station, the first visual inspection station, and the upper cover assembly station in sequence. The second conveyor assembly 282 converts the semi-finished products with upper covers from a one-by-one push mode to a batch push mode for four products. The third conveyor assembly 283 pushes the semi-finished products with upper covers in batches (four per batch) to the second visual inspection station and pushes the products that pass the visual inspection forward in batches to the laser coding station in sequence, and finally outputs them to the finished product counting and blanking device 29. The first conveying component 281 transports the semi-finished product to the upper cover assembly station, the second conveying component 282 is located on the rear side of the first conveying component 281, and the second conveying component 282 is used to convert the semi-finished products equipped with upper covers from a one-by-one pushing mode to a batch pushing mode of several together. The third conveying component 283 is located on the rear side of the second conveying component 282 and is used to push the semi-finished products equipped with upper covers in batches and step by step to the subsequent process.

[0078] In a specific embodiment, Figure 27As shown, the first conveying assembly 281 includes a plurality of first U-shaped claws 2811 for stepping and pushing semi-finished products, a first support plate 2812, a first cylinder 2813 and a second cylinder 2814. The plurality of first U-shaped claws 2811 are arranged on the first support plate 2812 at intervals along the length direction of the conveying track 40 and cooperate with the conveying surface of the conveying track 40; the first cylinder 2813 is connected to the first support plate 2812, and the first cylinder 2813 drives the first support plate 2812 and each first U-shaped claw 2811 to move telescopically along the width direction of the conveying track 40; the second cylinder 2814 is connected to the first cylinder 2813, and the second cylinder 2814 drives the first cylinder 2813 and the first support plate 2812 to move telescopically along the length direction of the conveying track 40. During operation, the piston rod of the first cylinder 2813 extends, driving the first U-shaped claws 2811 to extend and clamp the semi-finished products arranged on the conveyor track 40. Then, the piston rod of the second cylinder 2814 extends forward, driving the first cylinder 2813 and the second U-shaped claws to move a preset distance, causing each semi-finished product arranged on the conveyor track 40 to move forward one step. Then, the piston rod of the first cylinder 2813 retracts, driving the first U-shaped claws 2811 to retract and release the semi-finished products. Then, the piston rod of the second cylinder 2814 retracts, driving the first cylinder 2813 and the second U-shaped claws to return to their original position, and the above operation is repeated. This cycle is repeated, and the semi-finished products can be pushed forward one by one. During the initial feeding, the first U-shaped claw 2811 near the lower seat assembly station clamps the semi-finished product from the lower seat assembly station and pushes it forward. After repeating the action several times, a plurality of semi-finished products arranged at intervals are obtained on the conveying track 40. The plurality of semi-finished products are pushed forward one by one by the first conveying component 281.

[0079] In a specific embodiment, Figure 28As shown, the second conveying assembly 282 includes a first card plate 2822, a third cylinder 2821 and a fourth cylinder 2823. The first card plate 2822 is provided with a plurality of first U-shaped card grooves for stepping and pushing the semi-finished product equipped with the upper cover. The plurality of first U-shaped card grooves are distributed along the length direction of the conveying track 40 and are fitted on the conveying surface of the conveying track 40; the third cylinder 2821 is connected to the first card plate 2822, and the third cylinder 2821 drives the first card plate 2822 to telescopically move along the width direction of the conveying track 40; the fourth cylinder 2823 is connected to the third cylinder 2821, and the fourth cylinder 2823 drives the third cylinder 2821 and the first card plate 2822 to telescopically move along the length direction of the conveying track 40. During operation, the piston rod of the third cylinder 2821 extends, driving the first U-shaped groove on the rightmost side of the first clamping plate 2822 to clamp the first semi-finished product conveyed by the first conveying assembly 281, and then the piston rod of the fourth cylinder 2823 contracts, driving the third cylinder 2821 and the first clamping plate 2822 to move forward one step, moving the first semi-finished product to the position clamped by the second first U-shaped groove on the right side of the first clamping plate 2822, and then the third cylinder 2821 and the fourth cylinder 2823 reset, and repeat the above action, so that the first U-shaped groove on the rightmost side of the first clamping plate 2822 again clamps the second semi-finished product conveyed by the first conveying assembly 281, and conveys it forward one step, so that the second semi-finished product moves to the position clamped by the second first U-shaped groove on the right side of the first clamping plate 2822. At this time, the first semi-finished product has already moved to the position clamped by the third first U-shaped groove on the right side of the first clamping plate 2822. In this way, after repeating several times, each first-type groove of the first clamping plate 2822 clamps a semi-finished product, and as the fourth cylinder 2823 operates, the semi-finished products are pushed forward one step in batches.

[0080] In a specific embodiment, Figure 29As shown, the third conveying assembly 283 includes several second clamping plates 2831, a second support plate 2832, a fifth cylinder 2833 and a sixth cylinder 2834. The structure of each second clamping plate 2831 is consistent with the structure of the first clamping plate 2822 (that is, the second clamping plates 2831 are respectively provided with several third U-shaped clamping grooves). The several second clamping plates 2831 are arranged on the second support plate 2832 and are distributed and cooperated on the conveying surface of the conveying track 40 along the length direction of the conveying track 40; the fifth cylinder 2833 is connected to the second support plate 2832, and the fifth cylinder 2833 drives the second support plate 2832 and each second clamping plate 2831 to telescopically move along the width direction of the conveying track 40; the sixth cylinder 2834 is connected to the fifth cylinder 2833, and the sixth cylinder 2834 drives the fifth cylinder 2833 and the second support plate 2832 to telescopically move along the length direction of the conveying track 40. During operation, the piston rod of the fifth cylinder 2833 extends, driving each second clamping plate 2831 to extend, clamping multiple semi-finished products arranged on the conveyor track 40. Then, the piston rod of the sixth cylinder 2834 retracts, driving the fifth cylinder 2833 and each second clamping plate 2831 to move a preset displacement, so that each second clamping plate 2831 respectively moves several semi-finished products with upper covers or welded products on the conveyor track 40 forward one step in batches; then, the piston rod of the fifth cylinder 2833 retracts, driving each second clamping plate 2831 to retract; then, the piston rod of the sixth cylinder 2834 extends, driving the fifth cylinder 2833 and each second clamping plate 2831 to reset, and repeat the above action. By repeating this cycle, the semi-finished products with upper covers can be pushed to the second visual inspection station in batches (four in a batch), and the products that pass the visual inspection can be pushed forward in batches.

[0081] The working process of the square fuse automatic assembly machine of the present invention is as follows:

[0082] The motor 013 starts, driving the turntable 012 and the copper strip roll thereon to rotate. The copper strip 50 passes through the two clamping rollers and is transported forward by the two positioning pins of the copper strip feeding device 03. During the transportation process, the shaping, tinning, tinning detection, cleaning, drying and cutting processes are completed in sequence to obtain a copper sheet 60 with tinning in the middle. The copper sheet 60 is lifted by the two ejector pins 091 of the single-sheet feeding device 09 and transported to the single-sheet bending device 10 for bending to obtain a bent copper sheet 70. The bent copper sheet is transferred by the support rod 102 to the copper sheet carrier 114 of the assembly lower seat device. After the lower seat is output by the first vibrating disk 11, the lower seat is assembled with the said lower seat lifting device 112, U-shaped claw, first sheet pressing cylinder 13, limit cylinder 12, and pressing cylinder 113 to complete the assembly of the bent copper sheet 70 on the copper sheet carrier 110 and the lower seat 80 to obtain a semi-finished product. Next, the first conveyor assembly 281 of the second conveyor device 28 pushes the semi-finished product forward along the conveyor track 40, and it undergoes two rounds of hole expansion, loosening detection, defective piece sorting, power-on detection, power-on defective piece sorting, first visual inspection, and first appearance defective piece sorting before arriving at the upper cover assembly station. The negative pressure suction block 243 lifts the upper cover through negative pressure and moves the upper cover to the upper cover assembly station via the moving cylinder 241. At the upper cover assembly station, the upper cover assembly cylinder 242 of the upper cover assembly device 24 presses the suction block 243 and the upper cover it adsorbs downward to complete the assembly of the upper cover. Thereafter, the negative pressure suction block 243 releases the upper cover, and the upper cover assembly cylinder 242 and moving cylinder 241 return to their original positions. The first conveyor assembly 281 continues to push the semi-finished product with the upper cover forward, allowing it to complete the second visual inspection and second appearance defective piece sorting processes in sequence. Semi-finished products that have passed the upper cover assembly arrive at the second conveyor assembly 282, where they are arranged and integrated, switching to a step-by-step push mode in batches (four per batch). They are then continued forward by the third conveyor assembly 283, completing the second visual inspection, second appearance defective product sorting, and laser coding processes in sequence. Finally, the laser-coded product is the finished product, which is then pushed forward by the feeder of the finished product counting and blanking device 29 after passing through the counter 291 until it falls through the lower hopper 292 into the finished product collection box 293.

[0083] The present invention provides an automatic square fuse assembly method, using the aforementioned automatic square fuse assembly machine, comprising the following steps:

[0084] 1) The first conveyor transports the copper strip to the copper strip processing device for processing to obtain a single copper sheet;

[0085] 2) The single-sheet feeding device conveys the copper sheet to the single-sheet bending device, and the single-sheet bending device bends the copper sheet into a U-shape at both sides of the middle portion to obtain a bent copper sheet;

[0086] 3) The bent copper sheet is mounted on the lower seat at the assembly lower seat device to obtain a semi-finished product, which is then pushed forward along the conveying track by the second conveying device to the reaming device and the testing device for reaming and testing;

[0087] 4) The second conveying device pushes the semi-finished product that has passed the hole expansion and inspection to the upper cover assembly station, and the upper cover assembly device inserts the upper cover into the lower seat of the semi-finished product;

[0088] 5) The finished product conveying device outputs the assembled finished products.

[0089] In a specific embodiment, in step 2, the single-sheet bending device first presses half of the terminal of the bent copper sheet into the lower seat, and then performs secondary sheet pressing to completely press the bent copper sheet into the lower seat.

[0090] In a specific embodiment, the hole expansion in step 3 uses a primary hole expansion device and a secondary hole expansion device to expand the semi-finished product twice, and the inspection in step 3 uses a loosening detection mechanism, a power-on detection mechanism and a first visual inspection mechanism to perform loosening detection, power-on detection and visual inspection on the semi-finished product respectively.

[0091] In a specific embodiment, step 1 also includes: using a tinning device to tin the copper strip, and visually inspecting the copper strip tinned by the tinning device through a tinning visual inspection device; cleaning the copper strip after tinning using a cleaning device and drying it using a drying device; step 3 also includes: using a defective product sorting mechanism to sort out semi-finished products that have failed the loosening detection mechanism, using a power-on defective product sorting mechanism to sort out semi-finished products that have failed the power-on detection mechanism, and using a first appearance defective product sorting mechanism to sort out semi-finished products that have failed the first visual inspection mechanism; step 4 also includes: using a second visual inspection mechanism to inspect the semi-finished product with the upper cover, and using the second visual inspection defective product sorting mechanism to sort out the semi-finished product with poor upper cover assembly.

[0092] In a specific embodiment, the second conveying device pushes the semi-finished products one by one to the upper cover assembly station, and pushes the semi-finished products equipped with upper covers in batches to the second visual inspection and subsequent stations.

[0093] The above embodiments are only used to further illustrate an automatic square fuse assembly machine and an automatic square fuse assembly method of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the technical solution of the present invention.

Claims

1. A square fuse automatic assembly machine, characterized by: The machine comprises a first conveying device, a second conveying device, a copper strip processing device, a single-piece feeding device, a single-piece bending device, an assembly lower seat device, a conveying track, a hole expanding device, a detection device, an assembly upper cover device and a finished product conveying device. The copper strip processing device processes the copper strip into a single copper sheet. The single-piece feeding device conveys the single copper sheet processed by the copper strip processing device to the single-piece bending device to bend the single copper sheet into a U shape on both sides of the middle part to obtain a bent copper sheet. The single-piece bending device comprises a pressing cylinder, a support rod and a pressing part. A groove is provided in the middle of the pressing part. The support rod The middle part is fixed, and the pressing cylinder drives the pressing part to move to bend the two sides of the middle part of the single copper sheet on the support rod downward to form two opposite terminals; the assembling lower seat device installs the bent copper sheet on the lower seat to obtain a semi-finished product, and the assembling lower seat device includes a first vibration plate for conveying the lower seat, a lower seat track connected to the output end of the first vibration plate, a lower seat lifting device, a U-shaped claw, a first pressing cylinder, a limiting cylinder, a pressing cylinder, a second pressing cylinder and a copper sheet carrier; the lifting device lifts the lower seat transmitted from the first vibration plate and the lower seat track, and the piston rod of the first pressing cylinder faces downward and is connected to the first pressing cylinder The copper sheet carrier is used to receive the bent copper sheet conveyed from the support rod. When the copper sheet carrier is located directly below the first pressing seat, the U-shaped claw clamps the lower seat from the lower seat lifting device and transfers it to the bottom of the copper sheet carrier and fixes it. The first pressing cylinder drives the first pressing seat to press half of the terminal of the bent copper sheet into the lower seat. The limiting cylinder contracts to separate the copper sheet carrier from the bent copper sheet, and the pressing cylinder extends to press the bent copper sheet completely into the lower seat. The piston rod of the second pressing cylinder faces downward and is connected to the second pressing seat. The second pressing cylinder drives the second pressing seat to press the bent copper sheet completely into the lower seat to obtain a semi-finished product. The reaming The device, the detection device, and the assembly cover device are arranged in sequence along the conveying track, and respectively complete the corresponding processes for the semi-finished products pushed forward by the second conveying device along the conveying track. The reaming device includes a primary reaming device and a secondary reaming device installed in sequence along the conveying direction of the second conveying device. The detection device includes a loosening detection mechanism, a loading defective product sorting mechanism, a power-on detection mechanism, a power-on defective product sorting mechanism, a first visual detection mechanism and a first appearance defective product sorting mechanism installed in sequence along the conveying direction of the second conveying device; the front end of the finished product conveying device receives the end of the conveying track to output the finished product.

2. The square fuse automatic assembly machine according to claim 1, characterized in that: The primary reaming device and the secondary reaming device both include a first fixing seat, a reaming piece and a reaming cylinder. The first fixing seat fixes the mounting end of the bent copper sheet in the semi-finished product, and the reaming cylinder drives the reaming piece to be inserted into the two holes at the bottom of the lower seat of the semi-finished product to reame the terminals of the bent copper sheet.

3. The square fuse automatic assembly machine according to claim 1, characterized in that: The loosening detection mechanism includes a second fixed seat, two first probes and a first detection cylinder. The second fixed seat fixes the mounting end of the bent copper sheet in the semi-finished product, and the first detection cylinder drives the two first probes to insert into the two holes at the bottom of the lower seat of the semi-finished product to detect the tightness of the bent copper sheet and the lower seat. The defective product sorting mechanism selects out the semi-finished products that are detected as defective by the loosening detection mechanism; the power-on detection mechanism includes a third fixed seat, two second probes and a second detection cylinder. The third fixed seat fixes the mounting end of the bent copper sheet in the semi-finished product, and the second detection cylinder drives the two second probes to insert into the two holes at the bottom of the lower seat of the semi-finished product to detect whether it is electrically conductive. The power-on defective product sorting mechanism selects out the semi-finished products that are detected as defective by the power-on detection mechanism; the first appearance defective product sorting mechanism selects out the semi-finished products that are detected as defective by the first visual inspection mechanism.

4. The square fuse automatic assembly machine according to claim 1, characterized in that: It also includes a cover sending device, and the cover assembling device includes a moving cylinder, an upper cover assembly cylinder and a negative pressure suction block. The moving cylinder is arranged on one side of the cover sending device, and the piston rod of the upper cover assembly cylinder faces downward and is connected to the negative pressure suction block. The upper cover assembly cylinder is driven by the moving cylinder so that the negative pressure suction block sucks the upper cover from the cover sending device and transports it to the upper cover assembly station corresponding to the semi-finished product. At the upper cover assembly station, the upper cover assembly cylinder is pressed downward to insert the upper cover sucked by the negative pressure suction block into the lower seat of the semi-finished product.

5. The square fuse automatic assembly machine according to claim 1, characterized in that: After the upper cover device is assembled, a second visual inspection mechanism and a second appearance defective product sorting mechanism are further provided. The second appearance defective product sorting mechanism selects out the semi-finished products that are defective when detected by the second visual inspection mechanism.

6. The square fuse automatic assembly machine according to claim 5, characterized in that: The finished product conveying device includes a laser coding device and a finished product counting and blanking device. The laser coding device is arranged on the conveying track to receive and mark the products that have passed the second visual inspection mechanism and push them to the finished product counting and blanking device. The front end of the finished product counting and blanking device receives the conveying track and is provided with a counter. The rear end of the finished product counting and blanking device is provided with a discharge hopper, and a finished product collection box is provided below the discharge hopper.

7. The square fuse automatic assembly machine according to claim 5, characterized in that: The second conveying device includes a first conveying component, a second conveying component and a third conveying component. The first conveying component transports the semi-finished products to the upper cover assembly station. The second conveying component is located on the rear side of the first conveying component. The second conveying component is used to convert the semi-finished products equipped with upper covers from a one-by-one pushing mode to a batch pushing mode of several together. The third conveying component is located on the rear side of the second conveying component and is used to push the semi-finished products equipped with upper covers in batches to the second visual inspection and subsequent stations.

8. The square fuse automatic assembly machine according to claim 1, characterized in that: The copper strip processing device includes a tinning device, a tinning visual detection mechanism, a cleaning device, a drying device, and a copper sheet cutting device. The tinning device, the tinning visual detection mechanism, the cleaning device, the drying device, and the copper sheet cutting device are arranged in sequence along the conveying direction of the first conveying device, and respectively complete corresponding processes on the copper strip conveyed by the first conveying device.

9. The square fuse automatic assembly machine according to claim 8, characterized in that: The first conveying device includes a turntable continuous belt feeding device, a shaping device and a positioning needle copper belt feeding device. The turntable continuous belt feeding device, the shaping device and the positioning needle copper belt feeding device are distributed in sequence along the conveying direction. The positioning needle copper belt feeding device is located between the tinning device and the tinning visual detection mechanism; the shaping device is located between the tinning device and the turntable continuous belt feeding device, and shapes the copper belt conveyed by the turntable continuous belt feeding device.

10. A method for automatically assembling square fuses, characterized by: The square fuse automatic assembly machine according to any one of claims 1 to 9 comprises the following steps: 1) The first conveyor transports the copper strip to the copper strip processing device for processing to obtain a single copper sheet; 2) The single-sheet feeding device conveys the copper sheet to the single-sheet bending device, and the single-sheet bending device bends the copper sheet into a U-shape at both sides of the middle portion to obtain a bent copper sheet; 3) The bent copper sheet is mounted on the lower seat at the assembly lower seat device to obtain a semi-finished product, which is then pushed forward along the conveying track by the second conveying device to the reaming device and the testing device for reaming and testing; 4) The second conveying device pushes the semi-finished product that has passed the hole expansion and inspection to the upper cover assembly station, and the upper cover assembly device inserts the upper cover into the lower seat of the semi-finished product; 5) The finished product conveying device outputs the assembled finished products.

11. The automatic assembly method of square fuses according to claim 10, characterized in that: In step 2, the single-piece bending device first presses half of the terminal of the bent copper sheet into the lower seat, and then performs secondary pressing to completely press the bent copper sheet into the lower seat.

12. The automatic assembly method of square fuses according to claim 10, characterized in that: The hole enlarging in step 3 uses a primary hole enlarging device and a secondary hole enlarging device to perform hole enlarging on the semi-finished product twice, and the inspection in step 3 uses a loosening detection mechanism, a power-on detection mechanism and a first visual inspection mechanism to perform loosening detection, power-on detection and visual inspection on the semi-finished product respectively.

13. The automatic assembly method of square fuses according to claim 12, characterized in that: The step 1 also includes: using a tinning device to tin the copper strip, and visually inspecting the copper strip tinned by the tinning device through a tinning visual inspection device; cleaning the tinned copper strip using a cleaning device and drying it using a drying device; the step 3 also includes: using a defective product sorting mechanism to sort out semi-finished products that have failed the loosening detection mechanism, using a power-on defective product sorting mechanism to sort out semi-finished products that have failed the power-on detection mechanism, and using a first appearance defective product sorting mechanism to sort out semi-finished products that have failed the first visual inspection mechanism; the step 4 also includes: using a second visual inspection mechanism to inspect the semi-finished product with the upper cover, and using the second visual inspection defective product sorting mechanism to sort out the semi-finished product with poor upper cover assembly.

14. The automatic assembly method of square fuses according to claim 13, characterized in that: The second conveying device pushes the semi-finished products one by one to the upper cover assembly station, and pushes the semi-finished products equipped with upper covers in batches to the second visual inspection and subsequent stations.

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