A varistor coating processing equipment

Abstract

This invention relates to the field of varistor processing equipment technology, and particularly to a varistor coating equipment, which includes a frame, a feeding assembly, a coating assembly, a transfer assembly, a transition alignment assembly, and a receiving assembly. The feeding assembly has two modes: random material vibration sorting and fixture fixed-point feeding. The limit structure is infinitely adjustable and adaptable to the feeding of varistors of various specifications from 4mm to 12mm. The coating assembly integrates three-axis linkage spraying, workpiece rotation and flipping, insulating tape application, automatic glue replenishment, and overflow glue recovery functions, and can complete double-sided all-round coating of the workpiece. Two independent transfer mechanisms transfer the workpiece in a time-sequential, full-area manner. The transition alignment assembly completes the posture correction of the wet glued workpiece, and the receiving assembly realizes automatic limiting of finished products and layered stacking and collection. This invention achieves unmanned closed-loop processing of the entire process, with high coating yield and high glue consumable utilization. It is suitable for both large-scale mass production and small-batch prototyping, and is compatible with standardized production lines for electronic components.

Description

Technical Field

[0001] This invention relates to the field of varistor processing equipment technology, and in particular to a varistor coating processing equipment. Background Technology

[0002] Varistors are core overvoltage protection electronic components in power circuits, civilian electronic equipment, and industrial control power distribution systems. They rely on nonlinear volt-ampere characteristics to achieve line surge and high-voltage pulse discharge protection. In the production and processing of varistor finished products, two processes must be performed on the resistor's metal leads and the sidewalls of the ceramic body: point insulation coating and structural reinforcement coating. The cured adhesive can improve the moisture resistance and corrosion resistance of the varistor ceramic substrate, the insulation isolation of the leads, and the adhesion between the leads and the ceramic substrate. This avoids problems such as lead cracking, creepage leakage, and substrate breakdown failure under circuit board reflow soldering and wave soldering conditions, and is suitable for standardized SMT circuit board automated soldering and assembly operations.

[0003] Currently, the coating process for varistors in small and medium-sized electronic component processing plants has technological shortcomings and poor adaptability to mass production. Firstly, traditional processing relies entirely on manual material placement and manual application of glue using a pneumatic glue gun at individual points. The skill level of the workers directly determines the glue application quality, resulting in common defects such as uneven glue coating thickness on the leads, glue overflow covering the ceramic surface on the side walls, insufficient glue at the base of the leads, and glue bubbles. The consistency of glue application in a single batch of products is extremely poor. At the same time, labor costs are increasing year by year, and the daily processing capacity of a single person is only 800-1200 pieces, which cannot be adapted to the large-scale standardized mass production of the assembly line. Secondly, the existing semi-automatic special glue application equipment on the market has limited functions, only capable of single-sided glue application, and cannot be used for multi-sided glue application. Third, the existing semi-automatic equipment lacks an upstream and downstream automation link. There is no integrated automatic feeding, workpiece posture transfer, glue application alignment and correction, and finished product automatic collection closed-loop structure. Loading and unloading, workpiece flipping, glue application alignment, and finished product stacking and sorting mostly rely on manual assistance. Moreover, workpiece displacement before the glue has cured after application can easily cause glue misalignment and scrap. The receiving end can only perform simple unloading and requires manual sorting and stacking. The overall process is cumbersome, with low yield and low degree of automation. Fourth, the existing feeding station limiting structure is a welded fixed structure with non-adjustable spacing, which cannot be adapted to the shared online processing of varistors with diameters of 4mm-12mm and lead lengths of 2mm-8mm, resulting in limited compatibility. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a multifunctional, fully automated adhesive coating equipment for adaptive varistors. The aim is to solve the technical problems of high labor costs, poor coating quality consistency, limited equipment functionality, reliance on manual workpiece transfer and alignment, non-adjustable loading limits, inability to adapt to multiple workpiece specifications, and cumbersome finished product collection in existing varistor coating processes. This invention achieves automatic sorting of scattered varistors, dual-mode loading of standardized and regulated fixtures, multi-station coordinated transfer, all-around adhesive coating, real-time adhesive replenishment, workpiece alignment after adhesive coating, and automated layered material collection—a fully closed-loop, unmanned processing system. This improves the coating yield and mass production efficiency, and is compatible with the processing of all sizes of conventional varistors.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A varistor coating processing device includes a frame, a feeding assembly, a coating assembly, a transfer assembly, a transition alignment assembly, and a receiving assembly. The frame is equipped with a worktable. The feeding assembly is located on the left end of the top surface of the frame and is used for feeding varistors. The coating assembly is located on the top surface of the frame to the right of the feeding assembly and is used for coating the varistors with adhesive. The transition alignment assembly is located on the top surface of the frame to the right of the feeding assembly and is used for the transition placement of the coated varistors. The receiving assembly is located on the top surface of the frame to the right of the transition alignment assembly and is used to collect the coated varistors. The transfer assembly is located on the top surface of the frame in front of the coating assembly and is used to transfer the varistors from the feeding assembly to the coating assembly, from the coating assembly to the transition alignment assembly, and from the transition alignment assembly to the receiving assembly.

[0006] Furthermore, the feeding assembly includes a material placement mechanism and a material conveying mechanism arranged sequentially from front to back on the top surface of the workbench; the material conveying mechanism includes two feeding support frames spaced apart on the top surface of the workbench, with feeding support plates fixedly connected to the top of the two feeding support frames, and a plurality of feeding mounting blocks arranged in an array on the top of the feeding support plates, with two feeding limit plates of adjustable spacing on the top of the plurality of feeding mounting blocks; two motor mounting plates are fixedly connected to the bottom sides of the feeding support plates, and two conveying tightening shafts are rotatably arranged at the top between the two motor mounting plates. A conveyor drive shaft is rotatably mounted between the machine mounting plates, located below the conveyor tightening shaft. A front upper conveyor shaft is rotatably mounted at the upper end between the two front conveyor mounting plates, and a front lower conveyor shaft is rotatably mounted at the lower end between the two front conveyor mounting plates. A rear upper conveyor shaft is rotatably mounted at the upper end between the two rear conveyor mounting plates, and a rear lower conveyor shaft is rotatably mounted at the lower end between the two rear conveyor mounting plates. A feeding drive motor, connected to the conveyor drive shaft, is mounted on one side of a motor mounting plate. A common sleeve is fitted on the rear upper conveyor shaft, rear lower conveyor shaft, front upper conveyor shaft, front lower conveyor shaft, conveyor drive shaft, and two conveyor tightening shafts. A material conveyor belt is provided, with its top positioned between two feeding limit plates. Two front conveyor mounting plates are fixedly connected at intervals to the front end of the feeding support plate. Material baffles are fixedly connected to the front ends of the top surfaces of the two front conveyor mounting plates. One of the front conveyor mounting plates has a vertically adjustable front conveyor adjusting plate on one side, and a front conveyor adjusting rod is adjustable forward and backward on the top of the front conveyor adjusting plate. A front abutment guide wheel is rotatably mounted on one side of the front conveyor adjusting rod via a pivot pin, and the front abutment guide wheel is located directly above the material conveyor belt. Two rear conveyor mounting plates are fixedly connected at intervals to the rear end of the feeding support plate. One of the rear conveyor mounting plates... A rear conveyor adjustment plate is adjustable up and down on one side, and a rear conveyor adjustment rod is adjustable forward and backward on the top of the rear conveyor adjustment plate. A rear abutment guide wheel is rotatably mounted on one side of the rear conveyor adjustment rod via a shaft pin. The rear abutment guide wheel is located directly above the material conveyor belt. The material placement mechanism includes a placement base plate set on the top surface of the workbench. Two placement support rods are fixedly connected at intervals to the front end of the top surface of the placement base plate. Placement electric cylinders are fixedly connected to the two placement support rods. A placement fixture is fixedly connected to the output end of the placement electric cylinders. Several placement slots are linearly arrayed on the top surface of the placement fixture for array placement of varistors.Two placement adjustment rods are securely connected at intervals to the left end of the top surface of the placement base plate. A placement mounting plate is adjustable up and down on each of the two rods via placement adjustment blocks. A placement drive seat is located on one side of the mounting plate, and a placement drive plate that moves along a U-shaped trajectory is located on the other side. A placement drive motor, connected to the placement drive plate, is located on the other side of the mounting plate. A horizontal guide rail is fixedly connected to the bottom of one side of the mounting plate, and two vertical guide rails are fixedly connected to one side of the placement drive plate. A horizontal guide block slides on the horizontal guide rail, and two vertical guide blocks are fixedly connected to one side of each horizontal guide block, slidingly engaging with the two vertical guide rails. A placement mounting base is fixedly connected to the bottom of the two vertical guide rails, and a placement suction nozzle is fixedly connected to the mounting base, positioned directly above the placement fixture.

[0007] Furthermore, the feeding assembly also includes a feeding mechanism, which includes a feeding moving frame. A feeding conveyor is installed at the top of the feeding moving frame. The output end of the feeding conveyor is connected to the material conveyor belt. The feeding conveyor is used to place scattered varistors and neatly arrange the varistors to be conveyed onto the material conveyor belt.

[0008] Furthermore, the top surface of the workbench is provided with a glue cartridge mounting hole. The glue application assembly includes a glue collection hopper mounted on the glue cartridge mounting hole. A glue spraying mechanism is provided on the right side of the glue collection hopper on the top surface of the workbench. A receiving and flipping mechanism is provided on the top surface of the workbench in front of the glue collection hopper to receive the varistor transferred by the material transfer assembly and flip it to the glue collection hopper for the glue spraying mechanism to perform glue spraying operations. The receiving and flipping mechanism includes a receiving base plate provided on the top surface of the workbench. Two flipping seats are provided on the top surface of the receiving base plate at intervals on the left and right. A flipping frame is rotatably arranged between the two flipping seats. A first tilting drive motor connected to the tilting frame is installed on one side of the tilting base; several receiving adsorption cylinders for adsorbing varistors are arranged in a linear array on the tilting frame, each receiving adsorption cylinder has a driven pulley fixedly fitted at one end, and a lower tightening adjustment block is vertically adjustable between two adjacent driven pulleys on the tilting frame, with a lower tightening pulley rotatably mounted on one side of each lower tightening adjustment block via a shaft pin; a rotating mounting plate is fixedly connected to the top surface of the tilting frame, with a driving pulley rotatably mounted on one side of the rotating mounting plate, and two upper tightening adjustment blocks vertically adjustable on one side of the rotating mounting plate, each upper... An upper tensioning pulley is rotatably mounted on one side of the tightening adjustment block via a pivot pin. A rotary transmission belt is fitted onto the driving pulley, the upper tensioning pulley, the lower tensioning pulley, and the driven pulley. A first rotary drive motor, connected to the driving pulley, is mounted on the other side of the rotary mounting plate. The top of the colloid collection hopper has several tilting receiving slots arranged in a linear array to accommodate the outer diameter of the material receiving adsorption cylinder. The glue spraying mechanism includes a glue spraying X-axis module mounted on the top surface of the worktable. The output end of the glue spraying X-axis module is fixedly connected to a glue spraying X-axis moving seat, and the top surface of the glue spraying X-axis moving seat is fixedly connected to a glue spraying Z-axis. The module has a glue spraying Z-axis module whose output end is fixedly connected to a glue spraying Z-axis moving base. A glue spraying Y-axis module is fixedly connected to one side of the glue spraying Z-axis moving base. A glue spraying Y-axis moving base is fixedly connected to the output end of the glue spraying Y-axis module. A glue injection connecting rod is provided at the upper end of one side of the glue spraying Y-axis moving base. A glue spraying connecting rod is provided at the lower end of one side of the glue spraying Y-axis moving base. Several glue injection cylinders are arranged in a linear array on the glue injection connecting rod. Several glue spray nozzles are arranged in a linear array on the glue spraying connecting rod. Several glue spray nozzles are connected to several glue injection cylinders one by one, and several glue spray nozzles are located above the glue collection hopper.

[0009] Furthermore, the transition alignment component includes a transition support frame disposed on the top surface of the workbench, an alignment module disposed on the top surface of the transition support frame, and a plurality of alignment material placement seats disposed in a linear array at the output end of the alignment module, each alignment material placement seat being provided with an alignment adsorption nozzle, and an alignment adsorption tube communicating with the alignment adsorption nozzle being disposed on one side of each alignment material placement seat.

[0010] Furthermore, the top surface of the workbench is provided with guide plate mounting holes. The receiving assembly includes a receiving base plate located above the guide plate mounting holes on the top surface of the workbench, and two receiving support seats located in front of the guide plate mounting holes on the top surface of the workbench. A material collection conveyor belt is provided at the top of the two receiving support seats, and a collection plate for collecting varistors is placed on the material collection conveyor belt. A receiving mechanism for stacking and collecting the collection plates is provided on the receiving base plate. The receiving mechanism is connected to the output end of the material collection conveyor belt. A material blocking mechanism is also provided at the output end of the material collection conveyor belt to block the conveying of the collection plates. The receiving mechanism includes a plurality of receiving guide posts slidably arranged in a rectangular array on the receiving base plate. A collection frame for collecting the collection plates is provided at the top of the plurality of receiving guide posts. A collection electric cylinder that is driven and connected to the collection frame is installed at the center of the bottom surface of the receiving base plate.

[0011] Furthermore, the material blocking mechanism includes two material blocking support plates disposed on both sides of the output end of the material collecting conveyor belt, and a second material blocking connecting plate disposed at the bottom of the material collecting conveyor belt. A first material blocking connecting horizontal plate is fixedly connected to the top of the two material blocking support plates. A first material blocking connecting frame is fixedly connected to the top surface of the first material blocking connecting horizontal plate. Two first material blocking guide posts are slidably fitted on one side of the first material blocking connecting frame. A first material blocking connecting vertical plate is fixedly connected to one end of the two first material blocking guide posts. A first material blocking cylinder is fixedly connected to one side of the first material blocking connecting vertical plate. A first material blocking block is fixedly connected to the output end of the first material blocking cylinder. The first material blocking block is used to prevent excessive movement of the collecting plate. A first abutting cylinder is fixedly connected to one side of the first material blocking connecting frame. The output end of the first abutting cylinder is fixedly connected to the first material blocking connecting vertical plate. A second material blocking cylinder is fixedly connected to one side of the second material blocking connecting plate. The output end of the second material blocking cylinder is fixedly connected to the second material blocking block. The second material blocking block is used to block the movement of the collecting plate. A material collecting support frame is fixedly connected to the material collecting conveyor belt below the input end.

[0012] Furthermore, the material transfer assembly includes a material transfer support frame disposed on the top surface of the workbench. Two material transfer Y-axis guide rails are spaced apart on the top surface of the material transfer support frame. A material transfer Y-axis rack is disposed on the top surface of the material transfer support frame between the two material transfer Y-axis guide rails. A first material transfer mechanism and a second material transfer mechanism are disposed sequentially from left to right on the top surface of the material transfer support frame, sliding along the material transfer Y-axis guide rails. The first material transfer mechanism is used to transfer the varistor from the feeding assembly to the gluing assembly, and to transfer the varistor from the gluing assembly to the transition alignment assembly. The second material transfer mechanism is used to transfer the varistor from the transition alignment assembly to the receiving assembly.

[0013] Furthermore, the first material transfer mechanism includes a plurality of first material transfer Y-axis guide seats that slide in cooperation with the two material transfer Y-axis guide rails, and a first material transfer Y-axis gear that meshes with the material transfer Y-axis rack. A first material transfer Y-axis moving plate is fixedly connected to the top surface of the plurality of first material transfer Y-axis guide seats. A first left connecting frame and a first right connecting frame are spaced apart on the top surface of the first material transfer Y-axis moving plate. A first Y-axis drive motor is located on the top surface of the first material transfer Y-axis moving plate between the first left connecting frame and the first right connecting frame. The first Y-axis drive motor is drivenly connected to the first material transfer Y-axis gear. A first left Z-axis module is fixedly connected to the rear side of the first left connecting frame. A first left suction frame is fixedly connected to the output end of the left Z-axis module. Several first left suction nozzles are arranged in a linear array at the bottom of the first left suction frame. These first left suction nozzles are used to absorb varistors on the feeding assembly. A first right Z-axis module is fixedly connected to the rear side of the first right connecting frame. A first right suction frame is fixedly connected to the output end of the first right Z-axis module. Several first right suction nozzles are arranged in a linear array at the bottom of the first right suction frame. These first right suction nozzles are used to absorb varistors on the adhesive coating assembly that have already been coated with adhesive. The second material transfer mechanism includes several second material transfer Y-axis guides that slide in cooperation with the two material transfer Y-axis guide rails, and a material transfer Y-axis rack that meshes with the material transfer rack. The system comprises a second material transfer Y-axis gear, several second material transfer Y-axis guide seats, and a second material transfer Y-axis moving plate. A second Y-axis drive motor, driven by the second material transfer Y-axis gear, is mounted on the top surface of the second material transfer Y-axis moving plate. A second connecting plate is fixedly connected to the top surface of the second material transfer Y-axis moving plate. Two second X-axis guide rails are spaced apart on the top surface of the second connecting plate. A second X-axis rack is positioned between the two second X-axis guide rails on the top surface of the second connecting plate. A second X-axis gear meshes with the second X-axis rack. Several second X-axis guide seats are slidably fitted onto the two second X-axis guide rails. A second moving frame is fixedly connected to the top surface of the several second X-axis guide seats. A second X-axis drive motor, which is driven by a second X-axis gear, is fixedly connected to the second movable frame. Two second Z-axis guide seats are arranged vertically and vertically on one side of the second movable frame. A second Z-axis guide rail is slidably fitted on the two second Z-axis guide seats. A second Z-axis rack is fixedly connected to one side of the second Z-axis guide rail. The second Z-axis rack meshes with a second Z-axis gear. A second Z-axis drive motor, which is driven by a second Z-axis gear, is installed on the other side of the second movable frame. A second material transfer adsorption frame is fixedly connected to one side of the bottom end of the second Z-axis rack. The bottom end of the second material transfer adsorption frame has several material transfer adsorption nozzles arranged in a linear array for adsorbing the varistor on the transition alignment component.

[0014] Furthermore, the adhesive application assembly also includes a material flipping mechanism, an adhesive tape carrying mechanism, and an adhesive application mechanism arranged sequentially from front to back on the top surface of the workbench; the material flipping mechanism includes a flipping fixing frame arranged on the top surface of the workbench, with two Z-axis flipping guide seats spaced apart on one side of the flipping fixing frame, and two guide rail clearance holes spaced apart on the top surface of the workbench. Z-axis flipping guide rails passing through the guide rail clearance holes are slidably fitted on the two Z-axis flipping guide seats respectively. A Z-axis mounting frame is fixedly connected to one side of the two Z-axis flipping guide rails, and a flipping connecting plate is rotatably mounted on the Z-axis mounting frame. A second flipping drive motor connected to the flipping connecting plate is mounted on one side of the Z-axis mounting frame. Several adsorption pressure devices are arranged in a linear array on the flipping connecting plate. The resistor-sensitive resistor has a flip-type adsorption cylinder. Each flip-type adsorption cylinder has a fixedly fitted rotating driven wheel at its bottom. A protrusion is located on one side of the flip-type connecting plate, and a second rotary drive motor is mounted on the protrusion. The shaft of the second rotary drive motor rotatably passes through the protrusion and is fixedly fitted with a rotary drive wheel. Two rotary tightening wheels are rotatably arranged on both sides of the rotary drive wheel at the bottom of the protrusion. The two rotary drive wheels, the rotary tightening wheels, and several rotary driven wheels are all fitted with a rotary belt. A docking lifting cylinder is mounted on the bottom surface of the worktable. The telescopic shaft of the docking lifting cylinder can telescopically pass through the worktable and is fixedly connected to the bottom surface of the Z-axis mounting frame. The adhesive tape carrying mechanism includes an adhesive tape mounting frame located on the top surface of the worktable. An adhesive tape support is located on the left end of the top surface of the adhesive tape mounting frame. The adhesive tape X-axis module has two first adhesive tape mounting plates on the right side of the top surface of the adhesive tape mounting bracket. An X-axis guide rail is mounted on the top surface of the two first adhesive tape mounting plates, and several X-axis guide blocks slide on the X-axis guide rails. An adhesive tape moving plate is fixedly connected to the top surface of the X-axis guide blocks. The output end of the adhesive tape X-axis module is driven by the adhesive tape moving plate. A Y-axis module is located on the left side of the top surface of the adhesive tape moving plate, and two second adhesive tape mounting plates are located on the right side of the top surface of the moving plate. A Y-axis guide rail is mounted on the top surface of the two second adhesive tape mounting plates, and several Y-axis guide blocks slide on the Y-axis guide rails. An adhesive tape applicator is fixedly connected to the top surface of the Y-axis guide blocks. The output end of the adhesive tape Y-axis module is connected to the adhesive tape applicator. The adhesive tape applicator has a cloth placement slot and an adhesive flow channel spaced apart on its top front and back. Cloth with adhesive is placed in the cloth placement slot. Adhesive flow holes connecting the cloth placement slot and the adhesive flow channel are spaced apart on the adhesive tape applicator. Glue overflow boxes with glue overflow channels are symmetrically arranged on both sides of the adhesive tape applicator. Glue overflow holes connecting the glue overflow channel and the adhesive flow channel are symmetrically arranged on both sides of the adhesive tape applicator. The glue replenishment mechanism includes a glue replenishment support frame on the top surface of the workbench. A glue replenishment Y-axis module is fixedly connected to the top surface of the glue replenishment support frame. A glue replenishment moving plate is fixedly connected to the output end of the glue replenishment Y-axis module. Glue replenishment guns are arranged in a linear array on the glue replenishment moving plate, with the nozzles of the glue replenishment guns facing the adhesive flow channel.

[0015] Compared with the prior art, the varistor coating processing equipment provided by the present invention has the following beneficial effects: This invention integrates a feeding assembly, a gluing assembly, a material transfer assembly, a transition alignment assembly, and a receiving assembly on the machine frame. This enables dual-mode feeding, workpiece sidewall spraying or gluing, workpiece rotation and flipping, workpiece alignment and correction, multi-dimensional transfer, and layered material collection throughout the entire process. It replaces the traditional manual material placement, manual gluing, and manual receiving methods, increasing hourly production capacity by more than 150% and reducing labor costs by 85%. It effectively solves the problems of uneven gluing thickness, glue overflow and shortage, and poor product consistency caused by manual gluing. This invention features adjustable feeding limit plate, abutment guide wheel, adsorption height, and fixture groove diameter, allowing for processing of conventional varistors with outer diameters of 4mm-12mm and pins of 2mm-8mm without requiring modifications to the machine body structure. It is compatible with both random material vibration feeding and fixture-organized feeding modes, and is suitable for both mass production and small-batch prototyping. Unlike traditional single-function glue spraying equipment, this invention integrates functions such as circumferential sidewall glue application, automatic glue replenishment, and overflow glue recovery, which can meet the glue application process requirements of both conventional insulation and high-level insulation, and is suitable for different circuit board soldering conditions. This invention adds an independent transition alignment station to align and correct uncured wet adhesive workpieces, avoiding problems such as transfer deviation and adhesive scrapping, and facilitating the subsequent collection and neat placement of workpieces. At the same time, the dual independent material transfer mechanisms operate in sequence, eliminating waiting time and delays in the process, and ensuring strong equipment stability. This invention achieves automatic repositioning of the bearing plate and automatic stacking and storage of finished products by combining a material receiving component with a bidirectional material blocking and limiting structure and an electric cylinder lifting and stacking material receiving mechanism. It eliminates the need for manual sorting and organization, and can be directly connected to the packaging process at the back end, making it suitable for seamless production line integration. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the frame structure of Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the feeding assembly according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the material placement mechanism according to Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the material conveying mechanism according to Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the adhesive coating assembly according to Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the adhesive spraying mechanism in Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the material receiving and flipping mechanism according to Embodiment 1 of the present invention; Figure 9 This is a schematic diagram of the material transfer assembly according to Embodiment 1 of the present invention; Figure 10 This is a schematic diagram of the structure of the first material transfer mechanism in Embodiment 1 of the present invention; Figure 11 This is a schematic diagram of the structure of the second material transfer mechanism in Embodiment 1 of the present invention; Figure 12 This is a schematic diagram of the transition alignment component according to Embodiment 1 of the present invention; Figure 13 This is a schematic diagram of the material receiving assembly according to Embodiment 1 of the present invention; Figure 14 This is a schematic diagram of the material receiving mechanism according to Embodiment 1 of the present invention; Figure 15 This is a schematic diagram of the material blocking mechanism according to Embodiment 1 of the present invention; Figure 16 This is a schematic diagram of the adhesive coating assembly according to Embodiment 2 of the present invention; Figure 17 This is a schematic diagram of the material flipping mechanism according to Embodiment 2 of the present invention; Figure 18 This is a schematic diagram of the adhesive tape carrying mechanism of Embodiment 2 of the present invention; Figure 19 This is a schematic diagram of the glue application mechanism in Embodiment 2 of the present invention.

[0017] Numbering on the map: 1-Frame; 101-Workbench; 102-Glue Sleeve Mounting Hole; 103-Guide Plate Mounting Hole; 2-Feeding assembly; 21-Material placement mechanism; 211-Placing base plate; 212-Placing support rod; 213-Placing electric cylinder; 214-Placing fixture; 215-Placing slot; 216-Placing adjusting rod; 217-Placing adjusting block; 218-Placing mounting plate; 219-Placing drive seat; 2110-Placing drive plate; 2111-Placing drive motor; 2112-Horizontal guide rail; 2113-Horizontal guide block; 2114-Vertical guide rail; 2115-Vertical guide block; 2116-Placing mounting seat; 2117-Placing suction nozzle; 22-Material conveying mechanism; 221-Feeding support frame; 222-Feeding support plate; 223-Feeding mounting block; 224-Feeding... 225 - Material limiting plate; 226 - Motor mounting plate; 227 - Conveyor tightening shaft; 228 - Conveyor drive shaft; 229 - Front conveyor mounting plate; 2210 - Front upper conveyor shaft; 2211 - Front lower conveyor shaft; 2212 - Rear upper conveyor shaft; 2213 - Rear lower conveyor shaft; 2214 - Feeding drive motor; 2215 - Material conveyor belt; 2216 - Material baffle; 2217 - Front conveyor adjusting plate; 2218 - Front conveyor adjusting rod; 2219 - Front abutment guide wheel; 2220 - Rear conveyor adjusting plate; 2221 - Rear conveyor adjusting rod; 2222 - Rear abutment guide wheel; 23 - Feeding mechanism; 231 - Feeding moving frame; 232 - Feeding conveyor; 3-Glue application assembly; 31-Glue collection hopper; 311-Tilting receiving tank; 32-Glue spraying mechanism; 321-Glue spraying X-axis module; 322-Glue spraying X-axis moving seat; 323-Glue spraying Z-axis module; 324-Glue spraying Z-axis moving seat; 325-Glue spraying Y-axis module; 326-Glue spraying Y-axis moving seat; 327-Glue injection connecting rod; 328-Glue injection cylinder; 329-Glue spraying connecting rod; 3210-Glue spraying nozzle; 33-Receiving and tilting mechanism 331-Receiving base plate; 332-Tilting turntable; 333-Tilting frame; 334-First tilting drive motor; 335-Receiving adsorption cylinder; 336-Driven pulley; 337-Lower tightening adjustment block; 338-Lower tightening pulley; 339-Rotating mounting plate; 3310-Drive pulley; 3311-Upper tightening adjustment block; 3312-Upper tightening pulley; 3313-Rotary transmission belt; 3314-First rotary drive motor; 34-Material flipping mechanism; 341-Flipping fixing frame; 342-Z-axis flipping guide seat; 343-Guide rail clearance hole; 344-Z-axis flipping guide rail; 345-Z-axis mounting bracket; 346-Flipping connecting plate; 347-Second flipping drive motor; 348-Flipping adsorption cylinder; 349-Rotating driven wheel; 3410-Second rotating drive motor; 3411-Rotating drive wheel; 3412-Rotating belt; 3413-Docking lifting cylinder; 3414-Rotating tensioning wheel; 35-Adhesive tape support mechanism; 351-Adhesive tape mounting bracket; 352-Adhesive tape X-axis module; 353-First adhesive tape mounting plate; 354-Adhesive tape X-axis guide rail; 355-Adhesive tape X-axis guide block; 356-Adhesive tape moving plate; 357-Adhesive tape Y-axis module; 358-Second adhesive tape mounting plate; 359-Adhesive tape Y-axis guide rail; 3510-Adhesive tape Y-axis guide block; 3511-Adhesive tape applicator box; 3512-Cloth placement slot; 3513-Adhesive flow channel; 3514-Adhesive flow hole; 3515-Adhesive overflow box; 3516-Adhesive overflow channel; 3517-Adhesive overflow hole; 36-Adhesive filling mechanism; 361-Adhesive filling support frame; 362-Adhesive filling Y-axis module; 363-Adhesive filling moving plate; 364-Adhesive filling gun; 4-Transfer assembly; 41-Transfer support frame; 42-Transfer Y-axis guide rail; 43-Transfer Y-axis rack; 44-First transfer mechanism; 441-First transfer Y-axis guide seat; 442-First transfer Y-axis gear; 443-First transfer Y-axis moving plate; 444-First left connecting frame; 445-First right connecting frame; 446-First Y-axis drive motor; 447-First left Z-axis module; 448-First left suction frame; 449-First left suction nozzle; 4410-First right Z-axis module; 4411-First right suction frame; 4412-First right suction nozzle; 45-Second transfer mechanism; 451-Second transfer... 452-Second transfer Y-axis gear; 453-Second transfer Y-axis moving plate; 454-Second Y-axis drive motor; 455-Second connecting plate; 456-Second X-axis guide rail; 457-Second X-axis rack; 458-Second X-axis gear; 459-Second X-axis guide seat; 4510-Second moving frame; 4511-Second X-axis drive motor; 4512-Second Z-axis guide seat; 4513-Second Z-axis guide rail; 4514-Second Z-axis rack; 4515-Second Z-axis gear; 4516-Second Z-axis drive motor; 4517-Second transfer suction frame; 4518-Transfer suction nozzle; 5- Transition alignment component; 51- Transition support frame; 52- Alignment module; 53- Alignment material placement seat; 54- Alignment suction nozzle; 55- Alignment suction tube; 6-Collecting assembly; 61-Collecting base plate; 62-Collecting support seat; 63-Collecting conveyor belt; 64-Collecting plate; 65-Collecting mechanism; 651-Collecting guide post; 652-Collecting frame; 653-Collecting electric cylinder; 66-Blocking mechanism; 661-Blocking support plate; 662-Second blocking connecting plate; 663-First blocking connecting horizontal plate; 664-First blocking connecting frame; 665-First blocking guide post; 666-First blocking connecting vertical plate; 667-First blocking cylinder; 668-First blocking block; 669-First abutting cylinder; 6610-Second blocking cylinder; 6611-Second blocking block; 67-Collecting support frame; 7-Varistor. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0019] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0020] Example 1: like Figures 1-15 As shown, this embodiment provides a multifunctional adaptive varistor fully automatic glue coating processing equipment, including a frame 1, a feeding assembly 2, a glue coating assembly 3, a material transfer assembly 4, a transition alignment assembly 5, and a material receiving assembly 6; The frame 1 is a closed carbon steel welded frame 1. A high-precision CNC machine tool-grade worktable 101 is horizontally fixed on the top surface of the frame 1. The flatness error of the worktable 101 is ≤0.02mm, ensuring the coaxiality of the assembly of each module. The feeding assembly 2 is fixedly assembled on the left side of the worktable 101 on the top surface of the frame 1. As the upstream feeding unit of the equipment, it is compatible with two feeding modes: automatic sorting of scattered workpieces and fixed-point feeding of array fixtures. It completes the posture regulation and limit of the varistor 7 under different material conditions and adapts to the adaptive limit conveying of varistor 7 with multiple outer diameters and multiple pin specifications. The gluing assembly 3 is mounted on the top worktable 101 of the frame 1 and is located to the right of the feeding assembly 2. It is the core processing unit and integrates pin-point gluing, sidewall coating gluing, workpiece autonomous rotation gluing, insulating adhesive cloth bonding, automatic glue replenishment, and overflow glue recycling. It can simultaneously complete the composite process of insulating gluing of the 7 pins of the varistor and reinforcing the sidewall of the substrate, while recycling excess glue to reduce the waste of glue consumables. The transition alignment component 5 is fixedly assembled on the top workbench 101 of the frame 1 and located on the right side of the glue application component 3. It serves as a buffer and correction unit after glue application. It performs secondary alignment and adsorption limit correction on the varistor 7 in the uncured wet glue state, eliminates transport offset error, and provides a basis for the subsequent neat collection of glued varistor 7. At the same time, it can also avoid the wet glue from scratching and deforming, and ensure the consistency of the finished product appearance. The receiving component 6 is assembled at the rightmost end of the workbench 101 on the top surface of the frame 1. It serves as a downstream finished product receiving unit, enabling integrated material collection with pre-coating and curing of workpieces, automatic conveying of the bearing plate, and material discharge limit blocking, eliminating the need for manual sorting and stacking. The transfer component 4 is mounted across the worktable 101 on the top surface of the frame 1 and is located in front of the feeding component 2, the gluing component 3, the transition alignment component 5 and the receiving component 6. It is a full-range linkage transfer unit, equipped with two independent transfer actuators, which complete three transfer processes in sequence: transferring the calibrated varistors 7 from the feeding component 2 to the gluing component 3, transferring the workpiece with the sidewall gluing completed from the gluing component 3 to the transition alignment component 5, and transferring the finished workpiece with the alignment and correction completed from the transition alignment component 5 to the receiving component 6. The entire process is linked in sequence without waiting or jamming.

[0021] like Figures 3-5 As shown, preferably, the feeding component 2 includes a material placement mechanism 21 and a material conveying mechanism 22, which are assembled and fixed on the top surface of the workbench 101 from front to back. The material placement mechanism 21 is responsible for the fixed-point feeding of standardized array fixtures, which is suitable for small batch processing conditions. The material conveying mechanism 22 connects to scattered materials, which is suitable for large batch production line material processing conditions. The two modes can be switched freely. like Figure 5 As shown, the material conveying mechanism 22 includes two sets of feeding support frames 221 symmetrically and vertically locked to the top surface of the workbench 101. The top of the two sets of feeding support frames 221 is bolted together to a horizontally arranged feeding support plate 222. The top surface of the feeding support plate 222 is linearly arrayed and locked with multiple sets of feeding mounting blocks 223 along the material conveying direction. The top surface of the multiple sets of feeding mounting blocks 223 is slidably fitted with two sets of adjustable spacing feeding limit plates 224. Specifically, the two sets of feeding limit plates 224 have arc-shaped matching slots on opposite sides. The arc of the arc-shaped slots matches the outer ring contour of the ceramic varistor 7. The two sets of feeding limit plates 224 are equipped with a manual screw adjustment component (not shown in the figure) or can be adjusted by rotating the screw adjustment component or rotating the bolt to change the distance between the two sets of limit plates, which can be adapted to the 4mm-12mm outer diameter varistor 7 for limiting the conveying. After adjustment, the positioning is locked by locking bolts to avoid limit deviation during the conveying process. Two sets of motor mounting plates 225 are vertically welded and fixed to the left and right sides of the bottom of the feeding support plate 222. Two sets of parallel conveying and tightening shafts 226 are rotatably assembled in the top section of the two sets of motor mounting plates 225, and a conveying drive shaft 227 is rotatably assembled in the lower section of the two sets of motor mounting plates 225. Two sets of front conveying mounting plates 228 are welded to the front end of the feeding support plate 222. A front upper conveying shaft 229 and a front lower conveying shaft 2210 are rotatably assembled at the upper and lower ends of the two sets of front conveying mounting plates 228, respectively. Two sets of rear conveying mounting plates 2211 are welded to the rear end of the feeding support plate 222. A rear upper conveying shaft 2212 and a rear lower conveying shaft 2210 are rotatably assembled at the upper and lower ends of the two sets of rear conveying mounting plates 2211, respectively. The lower conveyor shaft 2213; the feed drive motor 2214 is fixed to the outer wall of the single-sided motor mounting plate 225 with bolts. The output shaft of the feed drive motor 2214 is coaxially connected to the conveyor drive shaft 227 through a coupling. The rear upper conveyor shaft 2212, the rear lower conveyor shaft 2213, the front upper conveyor shaft 229, the front lower conveyor shaft 2210, the conveyor drive shaft 227, and the two sets of conveyor tightening shafts 226 are all externally tensioned and fitted with an integrated anti-slip material conveyor belt 2215. The top surface of the material conveyor belt 2215 is placed between the two sets of feed limiting plates 224. The varistor 7 is placed on the material conveyor belt 2215. The workpiece is driven to move straight at a uniform speed by relying on the friction of the conveyor belt. Among them, a set of front conveying mounting plates 228 have vertically opened adjustment grooves on their outer walls. The front conveying adjustment plate 2217 is slidably assembled with bolts inside the grooves to achieve stepless vertical height adjustment. The top surface of the front conveying adjustment plate 2217 has horizontally opened transverse adjustment grooves. The transverse adjustment grooves are slidably assembled with the front conveying adjustment rod 2218 to achieve fine adjustment of the front and rear horizontal positions. The end of the front conveying adjustment rod 2218 is rotatably assembled with the front abutment guide wheel 2219 through a damping shaft pin. The outer ring of the front abutment guide wheel 2219 is covered with an anti-slip silicone sleeve, which is in contact with the top surface limit of the varistor 7. Position guidance; similarly, a set of rear conveyor mounting plates 2211 are vertically adjustable on the outer wall of the rear conveyor mounting plate 2211, and the rear conveyor adjusting plate 2220 is adjustable and equipped with a rear conveyor adjusting rod 2221. The end of the rear conveyor adjusting rod 2221 is rotated and equipped with a rear abutment guide wheel 2222. The two sets of abutment guide wheels cooperate with the conveyor belt to form an upper and lower limit channel to prevent the workpiece from tilting and flipping during conveying; the tops of the two sets of front conveyor mounting plates 228 are welded together with a vertical material baffle 2216 to block the workpiece from moving forward and unloading, and limit the workpiece to stop the glue application and loading station. like Figure 4As shown, the material placement mechanism 21 includes a placement base plate 211 bolted to the top surface of the workbench 101. Two sets of placement support rods 212 are vertically fixed at the front end of the top surface of the placement base plate 211. A placement electric cylinder 213 is horizontally mounted at the top of the two sets of placement support rods 212. The placement electric cylinder 213 is a servo electric cylinder with controllable stroke. A detachable placement fixture 214 is fixedly connected to the telescopic end of the placement electric cylinder 213. Multiple sets of circular placement slots 215 are linearly arrayed on the top surface of the placement fixture 214. The inner diameter of the placement slots 215 matches the outer diameter of a conventional varistor 7. Different slot diameter fixtures can be replaced as needed to achieve neat and orderly placement of workpieces in a single row. Two sets of vertically adjustable rods 216 are vertically fixed to the left end of the top surface of the base plate 211. Adjustable blocks 217 are sleeved on the outer walls of the two sets of rods 216. The adjustable blocks 217 can slide vertically along the rods and lock in place. The two sets of adjustable blocks 217 together support the horizontal mounting plate 218, enabling stepless adjustment of the overall height of the mounting plate 218. A mounting drive seat 219 is integrated on one side of the mounting plate 218. The mounting drive seat 219 has a built-in cam transmission structure that drives the mounting drive plate 2110, causing it to perform a closed U-shaped reciprocating translational trajectory. A mounting drive motor 2111 is bolted to the other side of the mounting plate 218. The mounting drive motor 2111, through a cam transmission structure, provides power to the mounting drive plate 2110. The bottom surface of the mounting plate 218 is horizontally locked with the horizontal guide rail 2112. The side wall of the placement drive plate 2110 is fixed with two sets of vertical guide rails 2114. The horizontal guide rail 2112 slides and matches the horizontal guide block 2113. The side wall of the horizontal guide block 2113 is fixed with two sets of vertical guide blocks 2115. The vertical guide blocks 2115 and the vertical guide rail 2114 slide vertically to form a horizontal and vertical composite sliding structure. The bottom ends of the two sets of vertical guide rails 2114 are fixedly connected with the placement mounting base 2116. The bottom surface of the placement mounting base 2116 is fixed with a negative pressure type for the placement suction nozzle 2117. The placement suction nozzle 2117 is externally connected to a negative pressure vacuum pump. The negative pressure start and stop are controllable. The placement suction nozzle 2117 is vertically aligned with the placement slot 215 of the placement fixture 214, realizing the integrated operation of U-shaped trajectory material picking, transfer and unloading.

[0022] Preferably, the feeding assembly 2 is also equipped with an independent feeding mechanism 23. The feeding mechanism 23 includes a foot-fixed feeding moving frame 231. A vibrating feeding conveyor 232 is mounted at the top of the feeding moving frame 231 at an angle. The feeding conveyor 232 is a prior art technology. The discharge end of the feeding conveyor 232 is aligned with the feed end of the material conveyor belt 2215 to achieve seamless connection. The vibrating feeding conveyor 232 relies on high-frequency small-amplitude vibration to sort the scattered stacked varistor 7 inside the hopper in an autonomous posture and arrange the pins in a uniform orientation. It is then transported in an orderly and uniform manner to the two sets of limit plates of the material conveyor belt 2215, completing the sorting of scattered incoming materials automatically without the need for manual sorting and placement.

[0023] like Figure 2, Figures 6-8 As shown, preferably, a square glue tube mounting hole 102 is vertically opened in the center area of ​​the top surface of the workbench 101. The glue application component 3 includes a funnel-shaped glue collection hopper 31 embedded and fixed inside the glue tube mounting hole 102. The glue collection hopper 31 is made of 304 stainless steel, and the inner wall is polished to prevent glue from sticking. It can collect glue drips and overflows, clean waste glue, and filter and recycle it for reuse. A CNC three-axis linkage glue spraying mechanism 32 is installed on the top surface of the workbench 101 and the right side of the colloid collection hopper 31. A receiving and flipping mechanism 33 is installed on the top surface of the workbench 101 and the front side of the colloid collection hopper 31. The receiving and flipping mechanism 33 receives the pressure-sensitive resistor 7 to be coated with glue placed down by the material transfer component 4, and rotates 90° autonomously to align it so that the side wall of the workpiece faces the glue spraying area above the colloid collection hopper 31, and completes the glue spraying operation on the side wall of the workpiece in conjunction with the glue spraying mechanism 32. like Figure 7 As shown, the receiving and turning mechanism 33 includes a receiving base plate 331 bolted to the top surface of the workbench 101. Two sets of turning seats 332 are symmetrically mounted vertically on the top surface of the receiving base plate 331. A turning frame 333 is horizontally mounted between the two sets of turning seats 332. A first turning drive motor 334 is bolted to the outer wall of one side of the turning seat 332. The first turning drive motor 334 is a servo motor with a brake, which can control the turning frame 333 to stop at a fixed angle of 90°. The output shaft of the first turning drive motor 334 is coaxially locked to the end of the turning frame 333, driving the turning frame 333 to rotate at an overall angle. The tilting frame 333 has multiple sets of receiving adsorption cylinders 335 arranged in a linear array along its length. Each receiving adsorption cylinder 335 has a microporous negative pressure adsorption port at its bottom, connected to an external negative pressure air source. A single varistor 7 is fixed for single-point adsorption, ensuring strong adsorption stability. Each set of receiving adsorption cylinders 335 has a driven pulley 336 coaxially fixedly sleeved on its outer ring at the end. A lower tightening adjustment block 337 is vertically slidably mounted between two adjacent sets of driven pulleys 336 on the tilting frame 333. The lower tightening adjustment block 337 can slide vertically and lock. A lower tightening pulley 338 is rotatably mounted on the shaft pin at the end of the lower tightening adjustment block 337. A rotating mounting plate 339 is fixedly connected to the top surface of the tilting frame 333. The end of the rotating mounting plate 339 rotates... The active pulley 3310 is assembled, and two sets of upper tightening adjustment blocks 3311 are vertically adjustable on the rotating mounting plate 339. The upper tightening adjustment blocks 3311 are rotatably equipped with upper tightening pulleys 3312. The active pulley 3310, all upper tightening pulleys 3312, all lower tightening pulleys 338, and all driven pulleys 336 are wrapped together in a closed loop with an anti-slip rotary transmission belt 3313. The outer wall of the rotating mounting plate 339 is fixed with a first rotary drive motor 3314. The output shaft of the first rotary drive motor 3314 is coaxially fixed with the active pulley 3310. The belt linkage synchronously drives all receiving adsorption cylinders 335 to rotate, realizing the circumferential coating of the pressure-sensitive resistor 7 by rotation, eliminating the dead corner of the coating. Multiple sets of flipping receiving grooves 311 are linearly arrayed on the top side of the colloid collection hopper 31. The inner diameter of the receiving groove is larger than the outer diameter of the receiving adsorption cylinder 335. When flipped and pressed down, the receiving adsorption cylinder 335 can be embedded in the groove, avoiding the flipping of the receiving adsorption cylinder 335 and the workpiece, and realizing full-circumference spraying of the workpiece sidewall. like Figure 8 As shown, the glue spraying mechanism 32 includes a glue spraying X-axis module 321 horizontally mounted on the top surface of the worktable 101. The glue spraying X-axis module 321 is a precision ball screw linear module. The sliding output end of the glue spraying X-axis module 321 is fixed to the glue spraying X-axis moving seat 322. The glue spraying X-axis moving seat 322 is vertically mounted with a glue spraying Z-axis module 323. The output end of the glue spraying Z-axis module 323 is fixed to a glue spraying Z-axis moving seat 324. The glue spraying Z-axis moving seat 324 is laterally and horizontally mounted with a glue spraying Y-axis module 325. The three-axis modules are orthogonally arranged to realize the movement and positioning of the glue nozzle 3210 at any point in three-dimensional space. The upper end of the glue injection connecting rod 327 is fixed laterally. Multiple sets of quantitative glue injection cylinders 328 are linearly arrayed at the bottom of the glue injection connecting rod 327. The glue injection cylinders 328 are connected to a high-pressure glue supply pump, and the glue flow rate and glue pressure can be electrically controlled and adjusted. The lower end of the glue spraying Y-axis moving seat 326 is fixed laterally to the glue spraying connecting rod 329. Multiple sets of dot-shaped glue spraying nozzles 3210 are arrayed at the bottom of the glue spraying connecting rod 329. The glue spraying nozzles 3210 correspond one-to-one with the glue injection cylinders 328 and are pressure-resistant and connected. The glue spraying nozzles 3210 are directly facing the glue application position of the workpiece above the glue collection hopper 31, and the glue spraying of the workpiece pins or the linear glue spraying of the outer ring side wall of the workpiece is completed in a time sequence.

[0024] like Figure 12 As shown, preferably, the transition alignment component 5 includes a transition support frame 51 fixed vertically to the top surface of the workbench 101 with bolts. A servo translational alignment module 52 is horizontally mounted on the top surface of the transition support frame 51. Multiple alignment material placement seats 53 are linearly arrayed on the top surface of the movable output end of the alignment module 52. The placement seats have contoured positioning slots to fit the shape of the varistor 7. Each alignment material placement seat 53 is embedded with an alignment adsorption nozzle 54. An alignment adsorption tube 55 is inserted into the side wall of the placement seat and connected to the alignment adsorption nozzle 54. The alignment adsorption tube 55 is connected to a negative pressure air source. After the workpiece is applied and placed on the placement seat, the negative pressure adsorption locks the workpiece. The alignment module 52 slightly translates to correct the angle and spacing of the workpiece, unifies the workpiece posture, and provides a guarantee for the subsequent orderly collection of workpieces. It corrects the workpiece that has shifted after multiple transfers and avoids the shift caused by wet glue scratching.

[0025] like Figure 2 , Figures 13-15As shown, preferably, a rectangular guide plate mounting hole 103 is formed through the right end of the top surface of the workbench 101. The receiving assembly 6 includes a receiving base plate 61 that covers and is assembled above the guide plate mounting hole 103, and two sets of receiving support seats 62 that are fixed parallel to the top surface of the workbench 101 and in front of the guide plate mounting hole 103. A material collection conveyor belt 63 is horizontally mounted on the top of the two sets of receiving support seats 62. The material collection conveyor belt 63 is a speed-regulating belt conveyor structure, and a belt surface of the material collection conveyor belt 63 is placed with... A removable square collecting plate 64 is made of anti-static rigid PVC board. A single collecting plate 64 can be arrayed with 24-48 glued varistors 7. The top surface of the collecting base plate 61 integrates a collecting mechanism 65, which is connected to the discharge end of the collecting conveyor belt 63 to realize the automatic stacking and storage of the collecting plate 64 carrying the workpiece. The discharge end of the collecting conveyor belt 63 is equipped with a baffle mechanism 66 to limit and block the discharge displacement of the collecting plate 64 and position the stacking and loading position. like Figure 14 As shown, the receiving mechanism 65 includes four sets of receiving guide posts 651 arranged in a rectangular array and vertically sliding through the surface of the receiving base plate 61. The four sets of receiving guide posts 651 can slide through the guide plate mounting holes 103. The tops of the four sets of receiving guide posts 651 are horizontally supported by a rectangular collecting frame 652. Specifically, the inner cavity size of the collecting frame 652 is adapted to the outer contour of the collecting plate 64, which serves as a four-sided limiting stacking function. A collecting electric cylinder 653 is vertically inverted at the center of the bottom surface of the receiving base plate 61. The collecting electric cylinder 653 extends and extends upward through the receiving base plate 61 and is coaxially fixedly connected to the bottom surface of the collecting frame 652. The lifting and lowering of the collecting frame 652 is controlled by the extension and retraction of the electric cylinder. In conjunction with the conveyor belt feeding plates, the collecting plates 64 carrying finished workpieces are stacked layer by layer to realize automated layered material collection.

[0026] like Figure 15 As shown, preferably, the material blocking mechanism 66 includes two sets of material blocking support plates 661 that are symmetrically and vertically fixed on both sides of the discharge end of the material collection conveyor belt 63, and a second material blocking connecting plate 662 that is horizontally fixed on the bottom of the frame 1 of the material collection conveyor belt 63. The top of the two sets of baffle support plates 661 is jointly supported by a first baffle connecting horizontal plate 663. The top surface of the first baffle connecting horizontal plate 663 is vertically fixed with a first baffle connecting frame 664. The first baffle connecting frame 664 is laterally slidably fitted with two sets of parallel first baffle guide posts 665. The ends of the two sets of first baffle guide posts 665 are jointly fixed with a first baffle connecting vertical plate 666. The outer wall of the first baffle connecting vertical plate 666 is laterally fixed with a first baffle cylinder 667. The telescopic end of the first baffle cylinder 667 is fixed with a rubber first baffle block 668. The first baffle block 668 faces the conveyor belt plate surface and laterally limits the horizontal displacement of the collecting plate 64. The side wall of the first baffle connecting frame 664 is laterally fixed with a first abutting cylinder 669. The telescopic end of the first abutting cylinder 669 engages with the first baffle connecting vertical plate 666 and pushes the first baffle block 668 to fit and limit its movement. The second baffle connecting plate 662 vertically fixes the second baffle cylinder 6610, and the extension end of the second baffle cylinder 6610 is fixed to the second baffle block 6611 with the extension end facing upward. The bottom surface of the limiting collection plate 64 is lifted from the bottom to achieve bidirectional limiting, thereby solving the problems of the collection plate 64 offset, misalignment, and skewed stacking. A vertical fixed material collection support frame 67 is installed below the feed end of the material collection conveyor belt 63. The material collection support frame 67 provides support for the material collection conveyor belt 63. At the same time, the height of the material collection support frame 67 is the same as the total height of the superimposed receiving support seat 62 on the workbench 101 of the frame 1, so that the material collection conveyor belt 63 is in a horizontal state.

[0027] like Figures 9-11 As shown, preferably, the material transfer assembly 4 includes a vertically integrally welded and fixed material transfer support frame 41 on the rear side of the top surface of the workbench 101. Two sets of high-precision material transfer Y-axis guide rails 42 are arranged parallel to each other on the top surface of the material transfer support frame 41. A long strip material transfer Y-axis rack 43 is arranged in the same direction between the two sets of material transfer Y-axis guide rails 42 on the top surface of the material transfer support frame 41. The first material transfer mechanism 44 and the second material transfer mechanism 45 are sequentially assembled from left to right along the Y-axis conveying direction on the top surface of the material transfer support frame 41. The two sets of material transfer mechanisms are driven independently and operate in sequence without interfering with each other. The first material transfer mechanism 44 is responsible for the front-end transfer: taking the varistor 7 from the feeding assembly 2 and then placing it on the gluing assembly 3, and taking the finished product from the gluing assembly 3 and then placing it on the transition alignment assembly 5. The second material transfer mechanism 45 is responsible for the rear-end transfer: taking the corrected workpiece from the transition alignment assembly 5 and then placing it on the collection plate 64 of the collecting conveyor belt 63 of the receiving assembly 6.

[0028] like Figure 10 As shown, the first material transfer mechanism 44 includes multiple sets of first material transfer Y-axis guide seats 441 that are engaged with two sets of material transfer Y-axis guide rails 42 at the bottom. The guide seats have built-in silent ball bearings, resulting in low sliding resistance. The top surfaces of the first material transfer Y-axis guide seats 441 are jointly supported by a first material transfer Y-axis moving plate 443. The bottom surface of the first material transfer Y-axis moving plate 443 is rotatably equipped with a first material transfer Y-axis gear 442. The first material transfer Y-axis gear 442 meshes with the material transfer Y-axis rack 43 for transmission. The top surface of the first material transfer Y-axis moving plate 443 is supported by a first Y-axis drive motor 446. The output shaft of the motor is coaxially connected to the first material transfer Y-axis gear 442 to provide translational force across the entire Y-axis range. The first Y-axis moving plate 443 is fixed with the first left connecting frame 444 and the first right connecting frame 445 on its top surface, enabling synchronous material handling at both workstations. The first left Z-axis module 447 is vertically mounted on the rear side of the first left connecting frame 444. The first left suction frame 448 is fixed at the lifting output end of the first left Z-axis module 447. Multiple sets of first left suction nozzles 449 are arrayed at the bottom of the first left suction frame 448, which use negative pressure to grip the varistor 7 to be processed after being shaped by the feeding assembly 2. The first right Z-axis module 4410 is vertically mounted on the rear side of the first right connecting frame 445. The first right suction frame 4411 is fixed at the lifting output end of the first right Z-axis module 4410. Multiple sets of first right suction nozzles 4412 are arrayed at the bottom of the first right suction frame 4411, which simultaneously grip the wet glue workpiece after the glue has been applied. The two suction frames move up and down and translate synchronously, improving the transfer efficiency. like Figure 11 As shown, the second material transfer mechanism 45 includes multiple sets of second material transfer Y-axis guide seats 451 that fit with the bottom of the material transfer Y-axis guide rail 42. A second material transfer Y-axis moving plate 453 is mounted on the top surface of the guide seat. A second material transfer Y-axis gear 452 that meshes with the material transfer Y-axis rack 43 is rotatably mounted on the bottom surface of the second material transfer Y-axis moving plate 453. A second Y-axis drive motor 454 for driving the rotation of the second material transfer Y-axis gear 452 is fixed on the top surface of the second material transfer Y-axis moving plate 453 to realize the Y-axis translation of the whole machine. A second connecting plate 455 is vertically fixed on the top surface of the second material transfer Y-axis moving plate 453. Two sets of second X-axis guide rails 456 are arranged in parallel on the top surface of the second connecting plate 455. A second X-axis rack 457 is arranged between the two sets of guide rails. The rack meshes with the second X-axis gear 458. The top surface of the second X-axis guide rail 456 slides through the second X-axis guide seat 459. The device is equipped with a second movable frame 4510. The top surface of the second movable frame 4510 is fixed with a second X-axis drive motor 4511 driving gear to rotate, realizing fine-tuning of the X-axis lateral displacement. The second movable frame 4510 is equipped with two sets of second Z-axis guide seats 4512 on its side and vertically. The guide seats slide with a vertical second Z-axis guide rail 4513. The side wall of the second Z-axis guide rail 4513 is fixed with a second Z-axis rack 4514. The rack meshes with a second Z-axis gear 4515. The side wall of the second movable frame 4510 is fixed with a second Z-axis drive motor 4516 driving gear transmission, realizing precise lifting and lowering of the Z-axis. The bottom end of the second Z-axis guide rail 4513 is fixed with a second material transfer adsorption frame 4517. The bottom end of the adsorption frame is arrayed with multiple sets of material transfer adsorption nozzles 4518, which adaptively grip and correct the finished workpiece. The multi-dimensional module linkage adapts to the material release angle of the receiving station.

[0029] In this embodiment, the material transfer Y-axis rack 43 can be divided into a first material transfer Y-axis rack 43 and a second material transfer Y-axis rack 43, which are spaced apart on the top surface of the material transfer support frame 41. The first material transfer Y-axis rack 43 meshes with the first material transfer Y-axis gear 442, and the second material transfer Y-axis rack 43 meshes with the second material transfer Y-axis gear 452, so as to realize the independent movement of the first material transfer mechanism 44 and the second material transfer mechanism 45 and avoid movement conflict.

[0030] Example 2: like Figures 16-19 As shown, this embodiment differs from Embodiment 1 in that the gluing component 3 can also be a material flipping mechanism 34, a tape carrying mechanism 35, and a glue replenishing mechanism 36 arranged from front to back on the top surface of the workbench 101. Compared with the gluing component 3 in Embodiment 1, they all have the effect of gluing. The difference is that it achieves the gluing operation on the side wall of the workpiece by using the adhesive-absorbing cloth in conjunction with the rotating and translating varistor 7. The thickness of the glued part is consistent and the glue is not applied to both sides of the workpiece.

[0031] It can also expand the composite processing function of the equipment, and can complete the insulation reinforcement cloth bonding after the pin is coated with glue, and the automatic replenishment process for local missing glue, and is suitable for customized processing of high insulation level varistors. The material turning mechanism 34 includes a turning fixing frame 341 vertically fixed to the top surface of the workbench 101. Two sets of Z-axis turning guide seats 342 are vertically fixed to the side wall of the turning fixing frame 341. Two sets of guide rail clearance holes 343 are vertically opened through the top surface of the workbench 101. The two sets of Z-axis turning guide seats 342 are vertically slidably engaged with Z-axis turning guide rails 344. The lower end of the Z-axis turning guide rails 344 extends through the guide rail clearance holes 343 to the bottom surface of the workbench 101. The top ends of the two sets of Z-axis turning guide rails 344 are jointly fixed to a Z-axis mounting frame 345. The Z-axis mounting frame 345 is laterally rotated to assemble a turning connecting plate 346. A second turning drive motor 347 is fixed to the outer wall of the Z-axis mounting frame 345, driving the turning connecting plate 346 to rotate at an overall angle of 90°. Multiple sets of turning adsorption cylinders 348 are rotated to assemble on the plate surface array of the turning connecting plate 346, and a pressure-adsorbent resistor 7 is fixed for negative pressure adsorption. The main body has a rotating driven wheel 349 coaxially fixed at the bottom of the flipping adsorption cylinder 348. The top surface of the integrated protrusion of the flipping connecting plate 346 is fixed with a second rotating drive motor 3410. The output shaft of the second rotating drive motor 3410 is fixed with a rotating drive wheel 3411. Two rotating tightening wheels 3414 are rotatably arranged on both sides of the rotating drive wheel 3411 on the bottom surface of the protrusion. A rotating belt 3412 is sleeved in a closed loop outside the rotating drive wheel 3411, the two rotating tightening wheels 3414 and all the rotating driven wheels 349, which drives the workpiece to rotate autonomously and complete the flipping and gluing of the other side wall of the workpiece. The bottom surface of the worktable 101 is inverted and connected to the lifting cylinder 3413. The telescopic rod of the lifting cylinder 3413 passes upward through the worktable 101 and is fixedly connected to the bottom surface of the Z-axis mounting bracket 345. The cylinder lifts and drives the overall flipping mechanism to rise and fall, so as to facilitate the gluing and bonding with the pressure-sensitive resistor 7. The adhesive tape carrying mechanism 35 includes an adhesive tape mounting frame 351 vertically fixed to the top surface of the workbench 101. An adhesive tape X-axis module 352 is horizontally mounted on the left end of the top surface of the adhesive tape mounting frame 351. Two sets of first adhesive tape mounting plates 353 are mounted on the right end of the top surface of the adhesive tape mounting frame 351. An adhesive tape X-axis guide rail 354 is mounted on the top surface of the two sets of first adhesive tape mounting plates 353. Multiple sets of adhesive tape X-axis guide blocks 355 are slidably matched to the guide rails. An adhesive tape moving plate 356 is mounted on the top surface of the guide blocks. The adhesive tape X-axis module 352 drives the adhesive tape moving plate 356 to move laterally. An adhesive tape Y-axis module 357 is mounted on the left end of the top surface of the adhesive tape moving plate 356. Two sets of second adhesive tape mounting plates 358 are mounted on the right end of the top surface of the second adhesive tape mounting plates 358. An adhesive tape Y-axis guide rail 359 is mounted on the top surface of the second adhesive tape mounting plates 358. An adhesive tape Y-axis guide block 3510 is slidably mounted on the guide rails. An adhesive tape applicator 3511 is fixed on the top surface of the guide blocks. The adhesive tape Y-axis module 357 drives the adhesive tape applicator 3511 to move longitudinally. The top of the adhesive tape applicator 3511 is divided into a cloth placement groove 3512 and an adhesive flow groove 3513. The cloth placement groove 3512 is filled with adhesive-impregnated insulating fiberglass cloth or ordinary flexible absorbent cloth. The cloth is suspended in the cloth placement groove 3512 and adheres to the side wall of the varistor 7 to improve the insulation performance. The adhesive tape applicator 3511 has an adhesive flow hole 3514 connecting the two grooves to realize the self-wetting of the cloth with adhesive. The adhesive tape applicator 3511 is symmetrically equipped with adhesive overflow boxes 3515. The overflow box has an adhesive overflow groove 3516 inside. The side wall of the box has an adhesive overflow hole 3517 connecting the adhesive flow groove 3513. Excess wetting adhesive flows into the overflow groove through the overflow hole for temporary storage to prevent adhesive from overflowing and contaminating the equipment table. The glue application mechanism 36 includes a glue application support frame 361 vertically fixed on the top surface of the workbench 101. A glue application Y-axis module 362 is horizontally arranged on the top surface of the glue application support frame 361. A glue application moving plate 363 is fixed at the output end of the glue application Y-axis module 362. Multiple quantitative glue application guns 364 are linearly arrayed and locked on the surface of the glue application moving plate 363. The glue application guns 364 are electrically controlled to start and stop independently. The nozzles of the glue application guns 364 face downwards and are directly facing the glue flow channel 3513 to replenish the adhesive and wet the fabric in real time, maintain a constant amount of adhesive wetted into the fabric, and ensure uniform bonding strength.

[0032] Working principle: The vibratory feeding conveyor 232 of the feeding mechanism 23 vibrates at high frequency and small amplitude to automatically organize the scattered stacked varistor resistors in the hopper, unify the pin orientation, and discharge them in an orderly manner, connecting and conveying them to the material conveyor belt 2215 of the material conveying mechanism 22. The operator adjusts the distance between the two sets of feeding limit plates 224 in advance by using the screw to match the outer diameter of the workpiece. At the same time, the vertical height of the front conveyor adjustment plate 2217 and the rear conveyor adjustment plate 2220 is adjusted to control the ground height of the front abutting guide wheel 2219 and the rear abutting guide wheel 2222 to match the vertical limit height of the workpiece. The feeding drive motor 2214 drives the conveying drive shaft 227 to rotate, which in conjunction with the conveying tightening shaft 226 and each set of conveying shafts drives the material conveyor belt 2215 to run in a closed loop at a uniform speed. The workpiece is clamped between the two sets of feeding limit plates 224 and conveyed straight. The upper and lower guide wheels clamp the workpiece to prevent it from warping or flipping during conveying, until the end of the workpiece is attached to the material baffle 2216 and stops in position, completing the automated feeding and straightening.

[0033] The material placement mechanism 21 is adapted to sample making and multi-specification mixed material processing conditions. The placement electric cylinder 213 pushes the placement fixture 214 to move to the material picking station. The placement drive motor 2111 drives the built-in cam transmission structure, which drives the placement drive plate 2110 to move along the horizontal guide rail 2112 and the vertical guide rail 2114 in a closed U-shaped reciprocating trajectory. This drives the bottom placement suction nozzle 2117 to pick up materials under negative pressure, transfer and transport them horizontally, and lower the workpiece. The pressure-sensitive resistor is then inserted into the placement groove 215 on the top surface of the placement fixture 214. At the same time, the vertical position of the placement adjustment block 217 can be adjusted to change the overall height of the placement mounting plate 218, which can be adapted to the material picking height of different sized workpieces so that the workpiece can be neatly loaded into the fixture.

[0034] The process is driven by the first Y-axis drive motor 446, which drives the first transfer Y-axis gear 442 to mesh with the rack and pinion transmission, thereby moving the first transfer Y-axis moving plate 443 along the transfer Y-axis guide rail 42. The first left Z-axis module 447 and the first right Z-axis module 4410 are raised and lowered independently. The first left suction nozzle 449 uses negative pressure to suction the workpiece to be processed at the feeding station and lowers it to the receiving and flipping mechanism 33. After the workpiece sidewall is coated with glue, the first right suction nozzle 4412 uses negative pressure to grab the wet glue workpiece and transfers it to the transition alignment component 5, completing the two-stage transfer of loading-glueing and glue-alignment.

[0035] The second Y-axis drive motor 454 drives the overall Y-axis translation mechanism, which, together with the second X-axis module and the second Z-axis module, performs multi-dimensional fine-tuning and positioning to adjust the gripping angle of the transfer adsorption nozzle 4518. The finished workpiece, after being corrected by negative pressure adsorption, is transferred and placed onto the material collection assembly 6 collection conveyor belt 63, completing the transfer from the correction station to the collection station.

[0036] When the workpiece is transferred to the gluing station, the receiving adsorption cylinder 335 is connected to negative pressure to receive the workpiece and place it down. The first flip drive motor 334 drives the flip frame 333 to flip 90° at a fixed point, causing the workpiece to sink and embed into the flip receiving groove 311 on the top surface of the glue collection hopper 31, avoiding the workpiece and ensuring that there are no dead corners for spraying at the bottom. The first rotation drive motor 3314 drives the active pulley 3310 to rotate, which in turn drives all the driven pulleys 336 to rotate synchronously through the rotation transmission belt 3313, causing all receiving adsorption cylinders 335 and workpieces to rotate at a uniform speed. The glue spraying X-axis module 321, glue spraying Z-axis module 323, and glue spraying Y-axis module 325 move in three-axis linkage. The glue dispensing flow rate of the glue dispensing cylinder 328 is controlled by electronic control. The glue spraying nozzle 3210 completes the fixed-point insulation glue spraying at the root of the pin and the circumferential reinforcement glue spraying on the outer wall of the workpiece in a time sequence. The dripping and scraping glue overflows directly into the 304 stainless steel glue collection hopper 31, where impurities are filtered and recycled for reuse.

[0037] After the adhesive is applied to the side wall of the workpiece, the first flip drive motor 334 drives the workpiece to reset. After the adhesive is applied, the adhesive is in an uncured wet state. During the transfer process, angle deviation and spacing misalignment are likely to occur. The transition alignment component 5 independently completes the workpiece posture correction: after the workpiece is lowered into the contour groove of the alignment material placement seat 53, the negative pressure air source is connected to the alignment adsorption nozzle 54 through the alignment adsorption tube 55, and the negative pressure locks the position of the workpiece; the servo alignment module 52 moves slightly to unify the placement angle and center spacing of the array workpieces, eliminate the transfer and adhesive offset errors, and avoid wet adhesive scratching deformation and adhesive misalignment and scrapping. After the correction is completed, wait for the second transfer mechanism 45 to grab and transfer it to the collection plate 64 of the receiving component 6.

[0038] The material receiving component 6 enables automatic conveying, bidirectional limiting, and layered stacking of the bearing plate without manual sorting or stacking. The anti-static PVC material collecting plate 64 carries the finished workpiece and is uniformly conveyed to the discharge collecting station by the speed-regulating collecting conveyor belt 63. The material blocking mechanism 66 provides bidirectional limiting and positioning: the first abutting cylinder 669 pushes the first material blocking connecting vertical plate 666 forward, causing the first material blocking block 668 to laterally press against the side of the collecting plate 64; the second material blocking cylinder 6610 lifts the second material blocking block 6611, which extends from the bottom to prevent the conveying of the subsequent collecting plate 64, and at the same time limits the collecting plate 64 that is collecting and discharging the material, locking the position of the collecting plate in both directions to prevent the stacked plates from tilting or misaligning. After a single collection plate is filled with finished products, the collection conveyor belt 63 shifts to transport empty collection plates. At the same time, the collection cylinder 653 retracts, driving the collection frame 652 to descend one grid height along the collection guide post 651. The collection plates carrying finished products are stacked layer by layer, and the automated layered collection is completed in a cyclical operation. The back end can be directly connected to the packaging production line.

[0039] The machine is powered by 380V industrial electricity and equipped with a PLC programmable controller for unified timing control. The touch screen can preset various parameters such as workpiece size, glue thickness, glue dispensing amount, module moving speed, and flipping angle. The equipment has a built-in self-diagnosis module for negative pressure leakage, insufficient glue, and module jamming faults, and provides immediate audible and visual alarms for abnormal working conditions. All guide rails and transmission gears are filled with long-lasting grease, and the transmission belts and conveyor belts are made of anti-static and wear-resistant materials, making it suitable for dust-free processing of electronic components. The entire process is linked and the cycle time is stable, enabling all-weather automated mass production.

[0040] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A coating equipment for varistors, characterized in that, Includes frame, feeding assembly, gluing assembly, transfer assembly, transition alignment assembly and receiving assembly; A workbench is provided on the frame; The feeding assembly is located at the left end of the top surface of the frame and is used for feeding the varistor. The glue application assembly is located on the top surface of the frame to the right of the feeding assembly and is used for applying glue to the varistors. The transition alignment component is located on the top surface of the frame to the right of the feeding component, and is used for the transition placement of the already coated varistors; The material collection assembly is located on the top surface of the frame to the right of the transition alignment assembly, and is used to collect the varistors that have been coated with adhesive. The material transfer assembly is located on the top surface of the frame, in front of the glue coating assembly. It is used to transfer the varistor from the feeding assembly to the glue coating assembly, from the glue coating assembly to the transition alignment assembly, and from the transition alignment assembly to the receiving assembly.

2. The varistor coating equipment according to claim 1, characterized in that, The feeding assembly includes a material placement mechanism and a material conveying mechanism arranged sequentially from front to back on the top surface of the workbench; The material conveying mechanism includes two feeding support frames spaced apart at the front and rear on the top surface of the workbench. The top of the two feeding support frames is fixedly connected to a feeding support plate. The top of the feeding support plate is provided with a number of feeding mounting blocks arranged in an array. The top of the number of feeding mounting blocks is provided with two feeding limit plates with adjustable spacing. Two motor mounting plates are fixedly connected to the bottom sides of the feeding support plate. Two conveying tightening shafts are rotatably installed at the top between the two motor mounting plates. A conveying drive shaft is rotatably installed between the two motor mounting plates and below the conveying tightening shaft. A front upper conveying shaft is rotatably installed at the upper end between the two front conveying mounting plates. A front lower conveying shaft is rotatably installed at the lower end between the two front conveying mounting plates. A rear upper conveying shaft is rotatably installed at the upper end between the two rear conveying mounting plates. A rear lower conveying shaft is rotatably installed at the lower end between the two rear conveying mounting plates. A feeding drive motor connected to the conveying drive shaft is installed on one side of one motor mounting plate. A material conveyor belt is sleeved on the rear upper conveying shaft, rear lower conveying shaft, front upper conveying shaft, front lower conveying shaft, conveying drive shaft, and two conveying tightening shafts. The top of the material conveyor belt is located between two feeding limit plates. Two front conveyor mounting plates are fixedly connected at intervals to the front end of the feeding support plate. Material baffles are fixedly connected to the front ends of the top of the two front conveyor mounting plates. One of the front conveyor mounting plates is equipped with a front conveyor adjusting plate that can be adjusted up and down on one side. A front conveyor adjusting rod is equipped with a front conveyor adjusting rod that can be adjusted forward and backward on the top of the front conveyor adjusting plate. A front abutting guide wheel is rotatably set on one side of the front conveyor adjusting rod through a shaft pin. The front abutting guide wheel is located directly above the material conveyor belt. Two rear conveyor mounting plates are fixedly connected at intervals to the rear end of the feeding support plate. One of the rear conveyor mounting plates has a rear conveyor adjusting plate that can be adjusted up and down on one side. The rear conveyor adjusting plate has a rear conveyor adjusting rod that can be adjusted forward and backward on the top of the rear conveyor adjusting plate. A rear abutting guide wheel is rotatably set on one side of the rear conveyor adjusting rod through a shaft pin. The rear abutting guide wheel is located directly above the material conveyor belt. The material placement mechanism includes a placement base plate set on the top surface of the workbench. Two placement support rods are fixedly connected at intervals to the front end of the top surface of the placement base plate. Placement electric cylinders are fixedly connected to the two placement support rods. Placement fixtures are fixedly connected to the output end of the placement electric cylinders. Several placement slots are linearly arrayed on the top surface of the placement fixtures for array placement of varistors. Two placement adjustment rods are fastened at intervals to the left end of the top surface of the placement base plate. Placement mounting plates are mounted on the two placement adjustment rods via placement adjustment blocks, adjustable up and down. A placement drive seat is located on one side of the placement mounting plate, and a placement drive plate that moves along a U-shaped trajectory is located on the other side of the placement mounting plate. A placement drive motor, connected to the placement drive plate, is located on the other side of the placement mounting plate. A horizontal guide rail is fixedly connected to the bottom of one side of the placement mounting plate, and two vertical guide rails are fixedly connected to one side of the placement drive plate. Horizontal guide blocks slide on the horizontal guide rails, and two vertical guide blocks are fixedly connected to one side of the horizontal guide blocks, slidingly engaging with the two vertical guide rails respectively. Placement mounting seats are fixedly connected to the bottom ends of the two vertical guide rails, and placement suction nozzles are fixedly connected to the placement mounting seats, located directly above the placement fixture.

3. The varistor coating equipment according to claim 2, characterized in that, The feeding assembly also includes a feeding mechanism, which includes a feeding moving frame. A feeding conveyor is installed at the top of the feeding moving frame. The output end of the feeding conveyor is connected to the material conveyor belt. The feeding conveyor is used to place scattered varistors and neatly arrange the varistors to be conveyed onto the material conveyor belt.

4. The varistor coating equipment according to claim 1, characterized in that, The top surface of the workbench is provided with a glue tube mounting hole. The glue application assembly includes a glue collection hopper installed on the glue tube mounting hole. A glue spraying mechanism is provided on the right side of the glue collection hopper on the top surface of the workbench. A receiving and flipping mechanism is provided on the front side of the glue collection hopper on the top surface of the workbench for receiving the varistor transferred by the material transfer assembly and flipping it to the glue collection hopper for the glue spraying mechanism to perform glue spraying operation. The receiving and turning mechanism includes a receiving base plate set on the top surface of the workbench, two turning seats are set on the top surface of the receiving base plate at intervals on the left and right, and a turning frame is rotatably set between the two turning seats. A first turning drive motor that is driven and connected to the turning frame is installed on one side of one turning seat. The tilting frame has several material adsorption cylinders for adsorbing varistors arranged in a linear array. Each material adsorption cylinder has a driven pulley fixedly fitted at one end. The tilting frame has a lower tightening adjustment block that is adjustable up and down between two adjacent driven pulleys. Each lower tightening adjustment block has a lower tightening pulley rotatably mounted on one side via a shaft pin. The top surface of the tilting frame is fixedly connected to a rotating mounting plate. A driving pulley is rotatably mounted on one side of the rotating mounting plate. Two upper tightening adjustment blocks are adjustable up and down on one side of the rotating mounting plate. Each upper tightening adjustment block has an upper tightening pulley rotatably mounted on one side via a shaft pin. A rotating transmission belt is fitted on the driving pulley, upper tightening pulley, lower tightening pulley and driven pulley. The other side of the rotating mounting plate is equipped with a first rotating drive motor that is driven and connected to the driving pulley. The top side of the colloid collection hopper has several tilting receiving grooves arranged in a linear array to accommodate the outer diameter of the material adsorption cylinders. The glue spraying mechanism includes a glue spraying X-axis module mounted on the top surface of the workbench. The output end of the glue spraying X-axis module is fixedly connected to a glue spraying X-axis moving base. A glue spraying Z-axis module is fixedly connected to the top surface of the glue spraying X-axis moving base. The output end of the glue spraying Z-axis module is fixedly connected to a glue spraying Z-axis moving base. A glue spraying Y-axis module is fixedly connected to one side of the glue spraying Z-axis moving base. The output end of the glue spraying Y-axis module is fixedly connected to a glue spraying Y-axis moving base. A glue injection connecting rod is mounted on the upper side of one side of the glue spraying Y-axis moving base. A glue spraying connecting rod is mounted on the lower side of one side of the glue spraying Y-axis moving base. Several glue injection cylinders are arranged in a linear array on the glue injection connecting rod. Several glue spray nozzles are arranged in a linear array on the glue spraying connecting rod. The several glue spray nozzles are connected one-to-one with the several glue injection cylinders, and the several glue spray nozzles are located above the glue collection hopper.

5. The varistor coating equipment according to claim 1, characterized in that, The transition alignment component includes a transition support frame disposed on the top surface of the workbench. An alignment module is disposed on the top surface of the transition support frame. Several alignment material placement seats are arranged in a linear array at the output end of the alignment module. An alignment adsorption nozzle is disposed on each alignment material placement seat. An alignment adsorption tube communicating with the alignment adsorption nozzle is disposed on one side of each alignment material placement seat.

6. The varistor coating equipment according to claim 1, characterized in that, The top surface of the workbench is provided with guide plate mounting holes. The material receiving assembly includes a material receiving base plate located above the guide plate mounting holes on the top surface of the workbench, and two material receiving support seats located on the top surface of the workbench in front of the guide plate mounting holes. A material collecting conveyor belt is provided at the top of the two material receiving support seats, and a material collecting plate for collecting varistors is placed on the material collecting conveyor belt. A material receiving mechanism for stacking and collecting the material collecting plates is provided on the material receiving base plate. The material receiving mechanism is connected to the output end of the material collecting conveyor belt. A material blocking mechanism is also provided at the output end of the material collecting conveyor belt to block the conveying of the material collecting plates. The receiving mechanism includes several receiving guide posts arranged in a rectangular array and slidably disposed on the receiving base plate. The top of the several receiving guide posts is provided with a collecting frame for collecting the collecting plate. A collecting electric cylinder that is driven and connected to the collecting frame is installed at the center of the bottom surface of the receiving base plate.

7. The varistor coating equipment according to claim 6, characterized in that, The material blocking mechanism includes two material blocking support plates located on both sides of the output end of the material collecting conveyor belt, and a second material blocking connecting plate located at the bottom of the material collecting conveyor belt. A first material blocking connecting horizontal plate is fixedly connected to the top of the two material blocking support plates. A first material blocking connecting frame is fixedly connected to the top surface of the first material blocking connecting horizontal plate. Two first material blocking guide posts are slidably fitted to one side of the first material blocking connecting frame. A first material blocking connecting vertical plate is fixedly connected to one end of each of the two first material blocking guide posts. A first material blocking cylinder is fixedly connected to one side of the first material blocking connecting vertical plate. A first material blocking block is fixedly connected to the output end of the first material blocking cylinder to prevent excessive movement of the collecting plate. A first abutting cylinder is fixedly connected to one side of the first material blocking connecting frame. The output end of the first abutting cylinder is fixedly connected to the first material blocking connecting vertical plate. A second material blocking cylinder is fixedly connected to one side of the second material blocking connecting plate. A second material blocking block is fixedly connected to the output end of the second material blocking cylinder to block the movement of the collecting plate. A material collecting support frame is fixedly connected to the material collecting conveyor belt below the input end.

8. The varistor coating equipment according to claim 1, characterized in that, The material transfer assembly includes a material transfer support frame disposed on the top surface of the workbench. Two material transfer Y-axis guide rails are spaced apart on the top surface of the material transfer support frame. A material transfer Y-axis rack is disposed on the top surface of the material transfer support frame between the two material transfer Y-axis guide rails. A first material transfer mechanism and a second material transfer mechanism are disposed sequentially from left to right on the top surface of the material transfer support frame, sliding along the material transfer Y-axis guide rails. The first material transfer mechanism is used to transfer the varistor from the feeding assembly to the gluing assembly, and to transfer the varistor from the gluing assembly to the transition alignment assembly. The second material transfer mechanism is used to transfer the varistor from the transition alignment assembly to the receiving assembly.

9. The varistor coating equipment according to claim 8, characterized in that, The first material transfer mechanism includes a plurality of first material transfer Y-axis guide seats that slide with the two material transfer Y-axis guide rails, and a first material transfer Y-axis gear that meshes with the material transfer Y-axis rack. A first material transfer Y-axis moving plate is fixedly connected to the top surface of the plurality of first material transfer Y-axis guide seats. A first left connecting frame and a first right connecting frame are provided on the top surface of the first material transfer Y-axis moving plate at intervals. A first Y-axis drive motor is provided on the top surface of the first material transfer Y-axis moving plate between the first left connecting frame and the first right connecting frame. The first Y-axis drive motor is drivenly connected to the first material transfer Y-axis gear. A first left Z-axis module is fixedly connected to the rear side of the first left connecting frame. A first left suction frame is fixedly connected to the output end of the first left Z-axis module. Several first left suction nozzles are arranged in a linear array at the bottom of the first left suction frame. The first left suction nozzles are used to adsorb the varistor on the feeding assembly. A first right Z-axis module is fixedly connected to the rear side of the first right connecting frame. A first right adsorption frame is fixedly connected to the output end of the first right Z-axis module. Several first right adsorption nozzles are arranged in a linear array at the bottom of the first right adsorption frame. The first right adsorption nozzles are used to adsorb the varistors that have been coated with adhesive on the adhesive coating assembly. The second material transfer mechanism includes several second material transfer Y-axis guide seats that slide with two material transfer Y-axis guide rails, and a second material transfer Y-axis gear that meshes with a material transfer Y-axis rack. A second material transfer Y-axis moving plate is fixedly connected to the top surface of the several second material transfer Y-axis guide seats. A second Y-axis drive motor, driven by the second material transfer Y-axis gear, is mounted on the top surface of the second material transfer Y-axis moving plate. A second connecting plate is fixedly connected to the top surface of the second material transfer Y-axis moving plate. Two second X-axis guide rails are spaced apart on the top surface of the second connecting plate. A second X-axis rack is positioned between the two second X-axis guide rails on the top surface of the second connecting plate. A second X-axis gear meshes with the second X-axis rack. Several second X-axis guide seats slide with the two second X-axis guide rails. A second movable frame is fixedly connected to the top surface of several second X-axis guide seats. A second X-axis drive motor, which is driven by the second X-axis gear, is fixedly connected to the second movable frame. Two second Z-axis guide seats are arranged vertically and vertically on one side of the second movable frame. A second Z-axis guide rail is slidably fitted on the two second Z-axis guide seats. A second Z-axis rack is fixedly connected to one side of the second Z-axis guide rail. The second Z-axis rack meshes with the second Z-axis gear. A second Z-axis drive motor, which is driven by the second Z-axis gear, is installed on the other side of the second movable frame. A second material transfer adsorption frame is fixedly connected to one side of the bottom end of the second Z-axis rack. Several material transfer adsorption nozzles are arranged in a linear array at the bottom end of the second material transfer adsorption frame for adsorbing the varistor on the transition alignment component.

10. The varistor coating equipment according to claim 1, characterized in that, The adhesive application assembly also includes a material flipping mechanism, an adhesive tape carrying mechanism, and an adhesive application mechanism arranged sequentially from front to back on the top surface of the workbench; The material turning mechanism includes a turning fixing frame mounted on the top surface of the workbench. Two Z-axis turning guide seats are spaced apart on one side of the turning fixing frame. Two guide rail clearance holes are spaced apart on the top surface of the workbench. Z-axis turning guide rails passing through the guide rail clearance holes are slidably fitted onto the two Z-axis turning guide seats. A Z-axis mounting frame is fixedly connected to one side of the two Z-axis turning guide rails. A turning connecting plate is rotatably mounted on the Z-axis mounting frame. A second turning drive motor, which is driven by the turning connecting plate, is mounted on one side of the Z-axis mounting frame. Several turning elements for adsorbing varistor resistors are arranged in a linear array on the turning connecting plate. The adsorption cylinder has a rotating driven wheel fixedly fitted at the bottom of each flip adsorption cylinder. A protrusion is provided on one side of the flip connecting plate. A second rotary drive motor is installed on the protrusion. The shaft of the second rotary drive motor can rotatably pass through the protrusion and is fixedly fitted with a rotary drive wheel. Two rotary tightening wheels are rotatably arranged on both sides of the rotary drive wheel at the bottom of the protrusion. The two rotary drive wheels, the rotary tightening wheels and several rotary driven wheels are all fitted with a rotary belt. A docking lifting cylinder is installed on the bottom surface of the worktable. The telescopic shaft of the docking lifting cylinder can telescopically pass through the worktable and is fixedly connected to the bottom surface of the Z-axis mounting frame. The adhesive tape carrying mechanism includes an adhesive tape mounting frame disposed on the top surface of the workbench. An X-axis module is disposed on the left end of the top surface of the adhesive tape mounting frame. Two first adhesive tape mounting plates are disposed on the right end of the top surface of the adhesive tape mounting frame. An X-axis guide rail is disposed on the top surface of the two first adhesive tape mounting plates. Several X-axis guide blocks are slidably fitted onto the X-axis guide rails. An adhesive tape moving plate is fixedly connected to the top surface of the several X-axis guide blocks. The output end of the adhesive tape X-axis module is drivenly connected to the adhesive tape moving plate. A Y-axis module is disposed on the left end of the top surface of the adhesive tape moving plate. Two second adhesive tape mounting plates are disposed on the right end of the top surface of the adhesive tape moving plate. A Y-axis module is disposed on the top surface of the two second adhesive tape mounting plates. The adhesive tape Y-axis guide rail has several adhesive tape Y-axis guide blocks that slide on it. The top surfaces of the adhesive tape Y-axis guide blocks are fixedly connected to adhesive tape applicators. The output end of the adhesive tape Y-axis module is driven and connected to the adhesive tape applicator. The top surface of the adhesive tape applicator is provided with a cloth placement groove and an adhesive flow groove at intervals. Cloth with adhesive is placed in the cloth placement groove. The adhesive tape applicator is provided with adhesive flow holes at intervals that connect the cloth placement groove and the adhesive flow groove. The adhesive tape applicator is provided with adhesive overflow boxes with adhesive overflow grooves on both sides symmetrically. The adhesive tape applicator is provided with adhesive overflow holes on both sides symmetrically. The glue application mechanism includes a glue application support frame set on the top surface of the workbench. A glue application Y-axis module is fixedly connected to the top surface of the glue application support frame. A glue application moving plate is fixedly connected to the output end of the glue application Y-axis module. Glue application guns are arranged in a linear array on the glue application moving plate, and the nozzles of the glue application guns face the glue flow channel.

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