Riveting device for magnesium alloy component of kitchen fan

Abstract

The invention relates to a kitchen fan magnesium alloy component riveting device, which belongs to the technical field of fan assembly, and comprises a machine body, a rotary worktable, a support frame, a pressing driving cylinder, a stamping rod piece, a cutting sleeve II, a liftable support base and a liftable cutting sleeve I, the cutting sleeve II and the cutting sleeve I which can be linked are arranged at the upper end and the lower end correspondingly, during riveting, the downward pressing driving air cylinder drives the cutting sleeve II and the cutting sleeve I on the rising supporting base to conduct punching, an insulating tape located between the cutting sleeve II and the cutting sleeve I is synchronously punched into an annular gasket, and then a punching rod piece continues to conduct downward pressing; according to the punching and riveting device, the annular gasket is tightly pressed between the rivet and the magnesium alloy part, integrated linkage of punching and riveting actions of the insulating gasket is achieved, direct contact between the magnesium alloy part and the rivet is effectively isolated, electrochemical corrosion is fundamentally avoided, meanwhile, the machining procedure is simplified, and the production efficiency and the riveting quality are improved.

Description

Technical Field

[0001] This invention belongs to the field of fan assembly technology and relates to a riveting device for magnesium alloy components of kitchen fans. Background Technology

[0002] As a core component of kitchen ventilation equipment, kitchen fans have high requirements for lightweight, structural strength, and corrosion resistance. Magnesium alloys, due to their low density, high specific strength, and excellent heat dissipation performance, are widely used in the processing and production of core components such as impellers and brackets for kitchen fans. Riveting is the mainstream processing method for assembling magnesium alloy fan components, which can ensure the connection strength between components, adapt to the processing characteristics of magnesium alloy materials, and meet the structural stability requirements of long-term operation of the fan.

[0003] Currently, the riveting of magnesium alloy components for kitchen fans is mostly completed using conventional stamping riveting equipment. This type of equipment has many technical defects in actual production and use, making it difficult to adapt to the operating environment and mass production requirements of kitchen fans. There is a significant electrode potential difference between magnesium alloy and conventional steel rivets. Kitchen fans are used in environments with mixed oil fumes and moisture for extended periods. The contact points between the rivets and magnesium alloy components are prone to galvanic cell effects, leading to electrochemical corrosion. This can result in surface rust and loose connections, or even structural failure of the fan, posing significant safety hazards. To mitigate corrosion, the industry often uses a post-riveting anti-corrosion paint coating. However, the tiny gaps between the rivet base and the magnesium alloy component cannot be completely filled by the paint, allowing oil fumes and moisture to penetrate through capillary action, resulting in limited anti-corrosion effectiveness. In some production scenarios, manual pre-placement of insulating gaskets is used to isolate the contact area. This method is not only cumbersome and inaccurate, but also prone to gasket misalignment and omissions, significantly reducing assembly efficiency and failing to meet the pace of mass production.

[0004] Existing riveting equipment often uses specialized rigid conforming molds for positioning and support structures. Each type of mold can only accommodate a single specification of fan component, resulting in poor versatility. Different molds are required for different models of magnesium alloy components, leading to high equipment investment costs and time-consuming mold replacements, thus affecting production continuity. Furthermore, magnesium alloy components have inherent casting tolerances, and rigid molds cannot achieve a perfect fit with the curved surfaces of the components. The instantaneous impact force during riveting acts on the gap between the parts, easily causing deformation and cracking of the magnesium alloy components, reducing product yield.

[0005] In terms of processing procedures, existing equipment does not achieve integrated linkage between insulating gasket punching, rivet loading, and riveting. Insulating tape cutting, gasket placement, rivet loading, and riveting pressing are all independent operations, requiring manual assistance in multiple stages. This results in low automation, cumbersome process connections, high labor intensity, and difficulty in ensuring processing consistency. Furthermore, existing equipment lacks a mechanical linkage structure for simultaneous punching and covering, making it impossible to complete on-site punching and pressing of insulating gaskets while riveting, further complicating the processing flow and hindering improvements in the assembly quality and production efficiency of magnesium alloy components for kitchen fans.

[0006] Therefore, a riveting device for magnesium alloy components of kitchen fans is proposed to solve the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to address the core technical defects in the existing riveting of magnesium alloy components for kitchen fans: electrochemical corrosion between magnesium alloy and steel rivets (corrosion failure caused by galvanic effect in oil fume and water vapor environment); inaccurate positioning, misalignment, and inefficiency of manually pre-placed insulating gaskets; and component deformation easily caused by rigid mold impact. This invention provides a riveting device for magnesium alloy components of kitchen fans.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a riveting device for magnesium alloy components of a kitchen fan, comprising: Organism; A rotary worktable is rotatably mounted on the top of the machine body and is used to place the assembly sleeve to be riveted and the protective mounting cover. A support frame is fixed to the top of the body; A downward-pressing drive cylinder is fixed to the top of the support frame; A stamping rod is fixed to the output end of the downward driving cylinder and is used to stamp rivets; Cutting sleeve II is slidably sleeved on the outer wall of the stamping rod, and is used to cut the insulating tape in conjunction with the protective mounting cover under the drive of the pressing drive cylinder; A support base is vertically mounted on the top of the machine body, and its top is used to abut against the lower edge of the assembly sleeve to cooperate with the stamping rod to apply pressure to the rivet; And a cutting sleeve I, which is vertically and flexibly mounted on the top of the support base, is used to cut the insulating tape with the lower edge of the sleeve when the support base is raised, forming an annular gasket; During riveting, the cutting sleeve II and the cutting sleeve I punch each other vertically, simultaneously cutting the insulating tape between them into the annular gasket, which is then pressed between the rivet and the component during the subsequent riveting process.

[0009] As a further improvement to the above technical solution: It also includes a conveying device located on the top of the machine body, which is used to convey the insulating tape between the assembly sleeve and the protective mounting cover for punching by the cutting sleeve II and the cutting sleeve I.

[0010] The conveying device includes: The unwinding reel is rotatably mounted on the top of the machine body and is used to unwind the insulating tape; The winding reel is rotatably mounted on the top of the machine body; A drive motor is connected to the winding reel body for driving the winding reel body to rotate; And guide rollers, rotatably mounted on the top of the machine body, for guiding the insulating tape; One end of the insulating tape is wound around the unwinding reel, and the other end is fixed to the winding reel after passing over the guide roller. The drive motor drives the winding reel to wind up the tape, thereby pulling the insulating tape to be conveyed at a constant speed.

[0011] It also includes a positioning device, which is disposed on one side of the support frame and is used to position the assembly sleeve before riveting.

[0012] The positioning device includes: A rotating connecting plate is rotatably connected at one end to the supporting frame; A conical positioning plate is disposed at the other end of the rotating connecting plate and is used to mate with the mounting hole on the assembly sleeve; And a drive cylinder I, whose cylinder body is hinged to the support frame, and whose output end is rotatably connected to the rotating connecting plate, so as to drive the conical positioning plate to insert or withdraw from the mounting hole, thereby realizing the circumferential and axial positioning of the mounting sleeve.

[0013] The top of the rotary table has multiple sets of threaded holes, and positioning rods for contacting the inner wall of the assembly cylinder are connected in the threaded holes to achieve radial positioning of the assembly cylinder.

[0014] It also includes a lifting drive cylinder, which is fixed to the top of the machine body and its output end is connected to the support base to drive the support base to lift.

[0015] The top of the support base is provided with a fixing hole, and a lower mold base for supporting rivets is provided in the fixing hole. The cutting sleeve I is sleeved on the outer wall of the lower mold base and can slide relative to it.

[0016] A spring I is fitted on the outer wall of the lower mold base. The two ends of the spring I abut against the bottom wall of the fixed mounting hole and the bottom of the cutting sleeve I, respectively, so as to drive the cutting sleeve I to reset.

[0017] Also includes: A conveying guide rail is fixed to the bottom of the support frame; The outer wall of the cutting sleeve II is provided with a feeding channel that communicates with the conveying guide rail, for receiving rivets from the vibrating feeder. And spring II, sleeved on the outer wall of the stamping rod, with its two ends abutting against the top of the stamping rod and the top of the cutting sleeve II respectively, for causing the cutting sleeve II to contact and cut the insulating strip first before the stamping rod when driven by the downward driving cylinder.

[0018] The double-end synchronous punching mechanism and the timing linkage mechanism work together to achieve a continuous action of punching first and riveting later through a single drive source. The upper and lower cutting sleeves punch synchronously, and annular gaskets that are perfectly adapted to the riveting surface are formed synchronously at the upper and lower ends of the riveting point. During the riveting process, the gaskets are synchronously pressed between the rivet and the magnesium alloy parts to form a complete physical insulation layer, which solves the problem of electrochemical corrosion from the root and avoids the problem of offset or omission of manual gasket placement, greatly improving the corrosion resistance reliability and processing consistency. The adjustable radial positioning mechanism of the rotary table works in conjunction with the flip-type axial positioning mechanism, which can adapt to magnesium alloy parts with different diameters and mounting hole positions without changing special molds. This greatly improves the versatility of the device, reduces equipment investment costs, and ensures accurate positioning and stable clamping, avoiding part deformation and cracking caused by riveting impact, thus improving the product qualification rate. The automatic conveying mechanism for insulating tape, the automatic feeding mechanism for rivets, and the multi-station rotary table circulation mechanism work together to achieve full automation of the entire process of insulating tape supply, gasket punching, rivet feeding, riveting processing, and station circulation. This significantly reduces manual intervention, lowers the intensity of manual labor, and improves the efficiency of mass production.

[0019] The combined effect of these mechanisms achieves reliable corrosion protection, universal compatibility, high efficiency and automation, and low-damage riveting.

[0020] The beneficial effects of this invention are as follows: 1. The riveting device for magnesium alloy components of a kitchen fan disclosed in this invention achieves synchronous punching and wrapping of insulating tape through the coordinated operation of cutting sleeve II, cutting sleeve I, spring I, and spring II. When the downward driving cylinder works, the top of the cutting sleeve II, in conjunction with the top of the protective mounting cover, and the cutting sleeve I, in conjunction with the sleeve, form a double punching action from the top and bottom, precisely punching the insulating tape into annular gaskets that fit the riveting surface. Subsequently, the punching rod continues to press down, passing the rivet through the gasket to complete the riveting, so that the annular gasket is tightly pressed against the rivet and the magnesium alloy component. Between them, a complete and tight physical insulation layer is formed, which isolates the magnesium alloy parts from the direct contact with the rivets and avoids potential corrosion between the two in the kitchen oil fume environment. At the same time, the annular gasket can also block oil fumes and water vapor from entering the riveting gap, further improving the anti-corrosion effect, significantly extending the service life of the magnesium alloy parts of the kitchen fan, reducing the later maintenance cost, and the cutting sleeve II and cutting sleeve I can continue to clamp the protective mounting cover and the mounting sleeve after punching, avoiding the instantaneous impact during riveting that causes the parts to deform or break at the gap where they are not fitted. 2. The riveting device for magnesium alloy components of a kitchen fan disclosed in this invention uses a positioning rod on a rotary worktable to adjust its contact with the inner wall of the assembly sleeve through a threaded engagement, thereby achieving radial positioning of the assembly sleeve and ensuring that the assembly sleeve is coaxial with the rotary worktable; the conical positioning plate in the positioning device is precisely matched with the mounting hole on the assembly sleeve, and is inserted into the mounting hole under the drive of the drive cylinder I, thereby achieving circumferential and axial positioning of the assembly sleeve and preventing the assembly sleeve from rotating or moving axially during riveting; 3. The riveting device for magnesium alloy components of a kitchen fan disclosed in this invention features a conveying device that, through the coordinated action of a drive motor, a take-up reel, an unwinding reel, and guide rollers, achieves automatic and uniform conveying of the insulating tape without the need for manual pulling. A vibrating feeding disc, in conjunction with the conveying guide rail and feeding channel, automatically feeds rivets without requiring manual placement. Cutting sleeve II and cutting sleeve I simultaneously punch the insulating tape, eliminating the need for manual pre-cutting and placement of gaskets. A rotary cylinder drives a rotary worktable to achieve intermittent rotation across multiple workstations, automatically switching the workstations of the parts to be processed and preparing for unloading after processing. The entire processing process requires only manual preparation and unloading, significantly reducing manual intervention, labor intensity, and labor costs.

[0021] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0022] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a three-dimensional structural schematic diagram of a riveting device for magnesium alloy components of a kitchen fan according to the present invention; Figure 2 This is a schematic diagram of the conveying device structure of a riveting device for magnesium alloy components of a kitchen fan according to the present invention; Figure 3 This is a schematic diagram of the rotary workbench structure of a riveting device for magnesium alloy components of a kitchen fan according to the present invention; Figure 4 This is a schematic diagram of the rotary workbench of the riveting device for magnesium alloy components of a kitchen fan according to the present invention from another perspective. Figure 5 This is a schematic diagram of the support base installation structure of the riveting device for magnesium alloy components of a kitchen fan according to the present invention; Figure 6 This is a schematic diagram of the position structure of the support base and stamping rod of the riveting device for magnesium alloy components of a kitchen fan according to the present invention; Figure 7 This is a schematic cross-sectional view of the stamped rod structure of the riveting device for magnesium alloy components of a kitchen fan according to the present invention; Figure 8 This is a cross-sectional view of the cutting sleeve II of the riveting device for magnesium alloy components of a kitchen fan according to the present invention.

[0023] Reference numerals: 1. Machine body; 11. Mounting bracket; 12. Rotary cylinder; 13. Fixed mounting plate; 14. Lifting drive cylinder; 15. Lifting support plate; 16. Support base; 161. Fixed mounting hole; 162. Limiting sleeve; 163. Lower mold base; 164. Cutting sleeve I; 165. Spring I; 17. Conveying guide rail; 2. Rotary worktable; 21. Threaded hole; 22. Positioning rod; 3. Assembly sleeve; 4. Protective mounting cover; 5. 6. Support frame; 7. Downward drive cylinder; 8. Stamping rod; 9. Spring II; 10. Cutting sleeve II; 11. Feeding channel; 2. Support column; 3. Conveying device; 4. Adjusting rod; 5. Support bracket; 6. Rewinding reel; 7. Guide roller; 88. Drive motor; 99. Insulating tape; 10. Unwinding reel; 11. Positioning device; 12. Rotating connecting plate; 13. Adjusting bracket; 14. Conical positioning plate; 15. Drive cylinder I. Detailed Implementation

[0024] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures, and should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0026] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0027] Example 1

[0028] like Figures 1-8 As shown, a riveting device for magnesium alloy components of kitchen fans can simultaneously complete the punching and wrapping of insulating gaskets during the riveting process of magnesium alloy components, reducing the potential corrosion between magnesium alloy materials and rivets, while improving the riveting positioning accuracy and processing stability. It is suitable for the mass production needs of magnesium alloy components of kitchen fans and solves the problems of cumbersome installation of insulating gaskets, inaccurate positioning, and easy corrosion and deformation of components in conventional riveting processes.

[0029] The machine body 1 serves as the supporting foundation for the entire device. It is constructed from welded metal sheets with a smooth, polished surface. Its function is to provide a stable mounting reference for all components, preventing foundation wobbling from affecting riveting accuracy. A mounting bracket 11 is bolted to one side of the top of the machine body 1. This bracket 11 is a vertical plate structure with a height designed to ensure the rotary cylinder 12 mounted on top is at a suitable working height, guaranteeing precise coordination between the rotary table 2's rotation trajectory and subsequent stamping and positioning actions. The rotary cylinder 12 is bolted to the top of the mounting bracket 11. The rotary cylinder 12 uses a conventional pneumatic drive structure, with its output end facing upwards. The output end is fixed to the rotary table 2 via a key connection. This connection ensures the stable transmission of the rotary cylinder 12's driving force to the rotary table 2, allowing the rotary table 2 to perform intermittent rotation under the drive of the rotary cylinder 12. The rotation angle for each rotation can be preset according to the processing station requirements, enabling continuous multi-station processing. The upper surface of the rotary table 2 is precision machined to ensure flatness and is used to place the assembly cylinder 3 and the protective mounting cover 4. The assembly cylinder 3 and the protective mounting cover 4 are arranged coaxially.

[0030] Multiple sets of evenly distributed threaded holes 21 are opened circumferentially on the top of the rotary table 2. The number of threaded holes 21 can be flexibly set according to the size of the assembly sleeve 3. A positioning rod 22 is installed in each threaded hole 21. The positioning rod 22 adopts a screw structure, with a knob for easy turning at one end and a smooth finish at the other end to avoid scratching the inner wall of the assembly sleeve 3. By having multiple positioning rods 22 simultaneously abut against the inner wall of the assembly sleeve 3, the radial positioning of the assembly sleeve 3 on the rotary table 2 is achieved, ensuring that the assembly sleeve 3 and the rotary table 2 remain coaxial, thereby ensuring the accuracy of the subsequent riveting position. At the same time, this adjustable positioning method can adapt to assembly sleeves 3 of different sizes, improving the versatility of the device.

[0031] A support frame 5 is fixedly installed on the other side of the top of the body 1. The support frame 5 adopts a portal frame structure, which is welded from a crossbeam and two side columns. The bottom is fixedly connected to the top surface of the body 1 by bolts. Its structural design can ensure its own load-bearing strength and prevent the downward drive cylinder 6 from shaking during operation. The downward drive cylinder 6 is fixedly installed at the center of the top of the support frame 5 by bolts. The downward drive cylinder 6 adopts a pneumatic drive method, and its output end is vertically downward. The end of the output end is fixedly connected to the stamping rod 61 through a flange. This connection method facilitates disassembly and maintenance, while ensuring the connection is firm. The stamping rod 61 adopts a stepped shaft structure. Its lower end is the stamping end. After quenching treatment, the hardness and wear resistance are improved. It is used to extrude and form rivets, causing the rivets to undergo plastic deformation and complete the riveting of magnesium alloy parts.

[0032] A cutting sleeve II 63 is slidably fitted onto the outer wall of the stamping rod 61. The inner diameter of the cutting sleeve II 63 matches the outer diameter of the stamping rod 61, ensuring that the cutting sleeve II 63 can slide smoothly along the outer wall of the stamping rod 61. The lower end of the cutting sleeve II 63 is provided with an annular cutting edge for punching the insulating tape 86. A spring II 62 is fitted onto the outer wall of the stamping rod 61. The spring II 62 is a compression spring, with its two ends abutting against the bottom of the large end of the stamping rod 61 and the top of the cutting sleeve II 63, respectively. The spring II 62 is always in a compressed state, applying a downward thrust to the cutting sleeve II 63. This elastic thrust allows the cutting sleeve II 63 to complete the downward pressing action before the stamping rod 61, ensuring that the punching of the insulating tape 86 is completed first, followed by the punching of the rivets, avoiding interference between the punching and pressing actions.

[0033] A feeding channel 64 is provided on the outer wall of the cutting sleeve II 63. The feeding channel 64 is opened along the axial direction of the cutting sleeve II 63, and its inner diameter is adapted to the diameter of the rivet, so that the rivet can smoothly enter the cutting sleeve II 63. The bottom of the support frame 5 is fixedly installed with a conveying guide rail 17 by a bracket. The conveying guide rail 17 adopts an arc structure and its inner wall is smoothed to reduce the friction during the rivet conveying process. One end of the conveying guide rail 17 is connected to the feeding channel 64, and the connection is made with a transition treatment to avoid the rivet getting stuck. The other end is connected to a vibrating feeder. The vibrating feeder arranges the rivets in an orderly manner through the vibration principle and continuously conveys them into the conveying guide rail 17, and then enters the cutting sleeve II 63 through the feeding channel 64, realizing automatic rivet feeding, reducing manual intervention and improving processing efficiency.

[0034] A lifting support structure is installed on the top of the machine body 1, located below the rotary worktable 2, to provide bottom support for the riveting process and to assist in the punching action of the insulating tape 86 below. A mounting plate 13 is bolted to the top of the machine body 1. The mounting plate 13 is horizontally arranged and has a flat surface. It is used to install the lifting drive cylinder 14. The area of ​​the mounting plate 13 is larger than the base area of ​​the lifting drive cylinder 14 to ensure the stability of the lifting drive cylinder 14 and prevent shaking during operation. The lifting drive cylinder 14 is bolted to the top of the mounting plate 13. The lifting drive cylinder 14 is pneumatically driven, with its output end vertically upward. Its end is fixedly connected to the lifting support plate 15 via a flange. The lifting support plate 15 is horizontally arranged and serves to support the support base 16, transmitting the driving force of the lifting drive cylinder 14.

[0035] The top of the lifting support plate 15 is bolted to an adjustable support base 16. The installation position of the support base 16 can be adjusted according to the height of the mounting sleeve 3, ensuring that the support base 16 can accurately fit with the lower edge of the mounting sleeve 3. Driven by the lifting drive cylinder 14, the support base 16 rises and falls vertically, with its top abutting against the lower edge of the mounting sleeve 3, providing stable bottom support for the riveting process, preventing the mounting sleeve 3 from sinking during riveting, and ensuring the effect of rivet stamping. A fixing mounting hole 161 is opened on the top of the support base 16. The fixing mounting hole 161 is a ring structure, and a lower die base 163 is formed inside it. The top of the lower die base 163 is adapted to the bottom of the rivet to support the bottom of the rivet, so that the rivet can be evenly stressed during the stamping process and avoid rivet deformation.

[0036] A cutting sleeve I 164 is fitted onto the outer wall of the lower die base 163. The inner diameter of the cutting sleeve I 164 is adapted to the outer diameter of the lower die base 163, allowing it to slide up and down along the outer wall of the lower die base 163. The upper end of the cutting sleeve I 164 is provided with an annular cutting edge, which cooperates with the lower edge of the mounting sleeve 3 to complete the punching of the insulating tape 86. The inner side wall of the fixed mounting hole 161 is provided with an internal thread. The limiting sleeve 162 is connected to the fixed mounting hole 161 through an external thread. The limiting sleeve 162 is located outside the cutting sleeve I 164, and its function is to limit the height position of the cutting sleeve I 164, prevent the cutting sleeve I 164 from disengaging during the reset process, and ensure the accurate size of the punched annular gasket. A spring I165 is sleeved on the outer wall of the lower mold base 163. The spring I165 is a compression spring, and its two ends abut against the bottom wall of the fixed mounting hole 161 and the bottom of the cutting sleeve I164, respectively. The spring I165 is always in a compressed state, applying an upward elastic force to the cutting sleeve I164, so that the cutting sleeve I164 can always fit against the lower surface of the insulating tape 86, ensuring that the insulating tape 86 can be completely cut during punching. At the same time, after punching is completed, the cutting sleeve I164 can be driven to return to its original position.

[0037] Two sets of conveying devices 8 are also installed on the top of the machine body 1. The two sets of conveying devices 8 are symmetrically arranged on both sides of the support frame 5 to realize the automatic conveying and unwinding of the insulating tape 86, providing a continuous supply of raw materials for the punching of the insulating gasket. Two support columns 7 are fixed to the top of the machine body 1 by bolts. The support columns 7 are arranged vertically, and their height can be adjusted according to the conveying height of the insulating tape 86. They are used to install the conveying devices 8. The conveying device 8 includes an adjusting rod 81, one end of which can be adjusted and installed on the support column 7 by a clamp. It can adjust the horizontal height and horizontal position according to the height of the equipped sleeve 3 to ensure that the insulating tape 86 can be accurately conveyed to the punching position.

[0038] The end of the adjusting rod 81 is bolted to a support bracket 82. The support bracket 82 has an L-shaped structure and is used to install the guide roller 84, the unwinding reel 87, the drive motor 85, and the take-up reel 83. A guide roller 84 is rotatably mounted on one side of the support bracket 82 via a bearing. The guide roller 84 is made of rubber with an anti-slip surface and guides the insulating tape 86, changing its conveying direction and preventing scratches on its surface. An unwinding reel 87 is rotatably mounted on one side of one of the support brackets 82 via a bearing. The unwinding reel 87 is used to wind the insulating tape 86. One end of the insulating tape 86 is fixed by a pressure plate and wound onto the unwinding reel 87. The unwinding reel 87 can rotate freely, unwinding the insulating tape 86 when it is pulled.

[0039] Another support bracket 82 has a drive motor 85 bolted to one side. The drive motor 85 is a servo motor, capable of precise speed adjustment. Its output end is connected to and fixedly fitted with a take-up reel 83 via a key. The take-up reel 83 and the unwinding reel 87 are arranged opposite each other. The other end of the insulating tape 86 passes over two guide rollers 84 and is fixed to the take-up reel 83 by a pressure plate. When the drive motor 85 is running, it drives the take-up reel 83 to rotate at a constant speed. Through friction, the insulating tape 86 is pulled out from the unwinding reel 87. After being guided by the guide rollers 84, it is conveyed to the punching position between the mounting sleeve 3 and the protective mounting cover 4, realizing the directional and uniform conveying of the insulating tape 86. The conveying speed can be adjusted according to the processing rhythm to ensure synchronization with the riveting action.

[0040] Example 2

[0041] Reference Figures 1-8 This invention provides a novel technical solution: a riveting device for magnesium alloy components of a kitchen fan. A positioning device 9 is provided on the side of the support frame 5 near the rotary worktable 2. The positioning device 9 positions the assembly sleeve 3 axially and circumferentially, ensuring that the assembly sleeve 3 does not shift during riveting and further improving riveting accuracy. The positioning device 9 includes a rotating connecting plate 91, which is made of rigid sheet metal. One end of the rotating connecting plate 91 is rotatably connected to the side wall of the support frame 5 via a hinge, allowing it to freely rotate around the hinge point. The other end of the rotating connecting plate 91 has an elongated hole. An adjusting bracket 92 is connected to the rotating connecting plate 91 via bolts passing through the elongated hole. This connection method allows the adjusting bracket 92 to be adjusted along the length of the rotating connecting plate 91 to adapt to different models of assembly sleeves 3. The bottom of the adjusting bracket 92 is fixed with a conical positioning plate 93 by bolts. The conical positioning plate 93 adopts a conical structure, and its taper is adapted to the mounting hole reserved on the assembly sleeve 3. It can be accurately inserted into the mounting hole to achieve circumferential and axial positioning of the assembly sleeve 3 and prevent the assembly sleeve 3 from rotating or moving axially during riveting.

[0042] A drive cylinder I 94 is hinged to the side wall of the support frame 5. The drive cylinder I 94 is pneumatically driven, and its output end is rotatably connected to the rotating connecting plate 91 via a pin. When the drive cylinder I 94 extends or retracts, it can drive the rotating connecting plate 91 to rotate around the hinge point with the support frame 5, thereby causing the conical positioning plate 93 to move closer to or away from the mounting sleeve 3. When positioning is required, the drive cylinder I 94 extends and pushes the rotating connecting plate 91 to rotate downward, so that the conical positioning plate 93 is inserted into the mounting hole of the mounting sleeve 3. After riveting is completed, the drive cylinder I 94 retracts and pulls the rotating connecting plate 91 to rotate upward, so that the conical positioning plate 93 is disengaged from the mounting sleeve 3, completing the positioning and avoidance action without affecting the rotation of the rotary table 2.

[0043] This device also includes a PLC controller, which is fixedly installed on the side wall of the machine body 1. The PLC controller is electrically connected to the rotary cylinder 12, the downward drive cylinder 6, the lifting drive cylinder 14, the drive cylinder I 94, and the drive motor 85. The PLC controller has a pre-stored action timing program, which is used to control each pneumatic / electric actuator to complete the linkage action according to the preset timing, so as to realize the automated continuous processing of insulating tape 86 punching and riveting.

[0044] Working principle: Before starting the device, preliminary preparations are carried out: Place the magnesium alloy assembly cylinder 3 to be processed on the rotary table 2, and screw the positioning rod 22 so that the positioning rod 22 abuts against the inner wall of the assembly cylinder 3 to complete the radial positioning of the assembly cylinder 3; fix one end of the insulating tape 86 on the unwinding reel 87, pass it around the two guide rollers 84 and then fix it on the take-up reel 83, and adjust the height and position of the adjusting rod 81 so that the two insulating tapes 86 are accurately located at the bottom of the assembly cylinder 3 and the top of the protective mounting cover 4; pour the rivets into the vibrating feeder, the vibrating feeder starts to work, and orderly conveys the rivets into the conveying guide rail 17, and then into the cutting sleeve II 63 to complete the material loading preparation.

[0045] After the preparation work is completed, the device starts to operate normally: First, the rotary cylinder 12 is started, which drives the rotary worktable 2 to rotate intermittently, rotating the mounting hole on the assembly sleeve 3 to directly below the stamping rod 61. At this time, the rotary worktable 2 stops rotating, completing the station positioning; then, the drive cylinder I 94 is started, the output end extends, and pushes the rotating connecting plate 91 to rotate downward around the hinge point with the support frame 5, driving the adjusting bracket 92 and the conical positioning plate 93 to move downward synchronously, so that the conical positioning plate 93 is accurately inserted into the reserved mounting hole on the assembly sleeve 3, completing the circumferential and axial positioning of the assembly sleeve 3, and preventing the assembly sleeve 3 from shifting during the riveting process.

[0046] After positioning is completed, the conveying device 8 starts, the drive motor 85 runs, and drives the take-up reel 83 to rotate at a constant speed, pulling the insulating tape 86 out from the unwinding reel 87. After being guided by the guide roller 84, it is conveyed at a constant speed to the punching position between the mounting sleeve 3 and the protective mounting cover 4. When the insulating tape 86 is conveyed to the specified length, the drive motor 85 stops running, and the insulating tape 86 remains stationary, waiting for punching.

[0047] Next, the lifting drive cylinder 14 starts, and its output end extends upward, pushing the lifting support plate 15 and the support base 16 to move upward synchronously. At the same time, the cutting sleeve I 164 extends upward under the elastic thrust of the spring I 165, and its top cutting edge fits tightly against the lower surface of the insulating tape 86, preparing for punching, until the top of the support base 16 fits tightly against the lower edge of the assembly sleeve 3. At this time, the support base 16 stops rising, providing bottom support for riveting, and the cutting sleeve I 164 completes the cutting. Since the insulating tape 86 itself has a pre-drilled mounting hole that matches the outer wall of the rivet, after being cut by the cutting sleeve I 164, it forms a washer.

[0048] Subsequently, the downward drive cylinder 6 is activated, and its output end extends downward, driving the stamping rod 61 and the cutting sleeve II 63 to move downward synchronously. Due to the downward elastic thrust applied by the spring II 62 to the cutting sleeve II 63, the cutting sleeve II 63 contacts the insulating tape 86 before the stamping rod 61. The cutting sleeve II 63 continues to move downward, and its lower end annular cutting edge cooperates with the top of the protective mounting cover 4 to punch the upper surface of the insulating tape 86. After punching, the cutting sleeve II 63 cooperates with the cutting sleeve I 164 to clamp the mounting sleeve 3 and the protective mounting cover 4, so that the mounting sleeve 3 and the protective mounting cover 4 are in close contact.

[0049] After punching, the downward drive cylinder 6 continues to extend downward, and the punching rod 61 overcomes the elastic force of the spring II 62 and slides downward relative to the cutting sleeve II 63. The lower end of the punching rod 61 contacts the rivet inside the cutting sleeve II 63 and applies a downward squeezing force to the rivet. Under the squeezing force of the punching rod 61 and the supporting force of the lower die base 163, the rivet undergoes plastic deformation and passes through the punched annular washer and the riveting holes of the mounting sleeve 3 and the protective mounting cover 4, completing the riveting action. At this time, the annular washer is tightly pressed between the rivet and the mounting sleeve 3 and the protective mounting cover 4, forming a physical insulation layer to prevent the mounting sleeve 3 and the protective mounting cover 4 from directly contacting the rivet, thereby preventing potential corrosion between the two in the kitchen oil fume environment.

[0050] After riveting is completed, each component is reset sequentially: the output end of the downward drive cylinder 6 retracts, driving the stamping rod 61 to reset upward, and the cutting sleeve II 63 resets upward synchronously under the action of the spring II 62; the output end of the lifting drive cylinder 14 retracts, driving the lifting support plate 15 and the support base 16 to reset downward, and the cutting sleeve I 164 resets downward under its own weight and the action of the spring I 165; the output end of the drive cylinder I 94 retracts, pulling the rotating connecting plate 91 to flip upward, driving the conical positioning plate 93 to disengage from the assembly sleeve 3, completing the positioning and avoidance; then, the drive motor 85 runs again, driving the winding reel 83 to rotate, collecting the waste insulating tape 86 after punching, and at the same time conveying new insulating tape 86 to the punching position; finally, the rotary cylinder 12 starts, driving the rotary worktable 2 to rotate, rotating the riveted magnesium alloy component to the remaining riveting positions, thereby realizing batch continuous processing.

[0051] However, as is well known to those skilled in the art, the working principles and wiring methods of the rotary cylinder 12, lifting drive cylinder 14, pressing drive cylinder 6, drive motor 85 and drive cylinder I 94 are all conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A riveting device for magnesium alloy components of a kitchen fan, characterized in that, include: Body (1); A rotary worktable (2) is rotatably mounted on the top of the machine body (1) for placing the assembly sleeve (3) to be riveted and the protective mounting cover (4). The support frame (5) is fixed to the top of the body (1); A downward-pressing drive cylinder (6) is fixed to the top of the support frame (5); A stamping rod (61) is fixed at the output end of the downward driving cylinder (6) and is used to stamp rivets; Cutting sleeve II (63) is slidably sleeved on the outer wall of the stamping rod (61) and is used to cut the insulating tape (86) in conjunction with the protective mounting cover (4) under the drive of the pressing drive cylinder (6); The support base (16) is vertically mounted on the top of the body (1), and its top is used to abut against the lower edge of the mounting sleeve (3) to cooperate with the stamping rod (61) to apply pressure to the rivet; And cutting sleeve I (164), which is vertically mounted on the top of the support base (16), is used to cut the insulating tape (86) with the lower edge of the sleeve (3) when the support base (16) is raised to form an annular gasket; During riveting, the cutting sleeve II (63) and the cutting sleeve I (164) punch and cut the insulating strip (86) located between them into the annular gasket, which is then pressed between the rivet and the component during the subsequent riveting process.

2. The riveting device for magnesium alloy components of a kitchen fan according to claim 1, characterized in that, It also includes a conveying device (8) located on the top of the machine body (1), the conveying device (8) being used to convey the insulating tape (86) to the spacer sleeve (3) and the protective mounting cover (4) for punching by the cutting sleeve II (63) and the cutting sleeve I (164).

3. The riveting device for magnesium alloy components of a kitchen fan according to claim 2, characterized in that, The conveying device (8) includes: The unwinding reel (87) is rotatably mounted on the top of the machine body (1) and is used to unwind the insulating tape (86). The winding reel (83) is rotatably mounted on the top of the machine body (1); A drive motor (85) is connected to the winding reel body (83) for driving the winding reel body (83) to rotate; And guide rollers (84), which are rotatably disposed on the top of the body (1) for guiding the insulating strip (86); One end of the insulating tape (86) is wound around the unwinding reel (87), and the other end is fixed to the winding reel (83) after passing over the guide roller (84). The drive motor (85) drives the winding reel (83) to wind up the tape, thereby pulling the insulating tape (86) to be conveyed at a constant speed.

4. The riveting device for magnesium alloy components of a kitchen fan according to claim 1, characterized in that, It also includes a positioning device (9), which is disposed on one side of the support frame (5) and is used to position the assembly sleeve (3) before riveting.

5. The riveting device for magnesium alloy components of a kitchen fan according to claim 4, characterized in that, The positioning device (9) includes: Rotate the connecting plate (91), one end of which is rotatably connected to the support frame (5); A conical positioning plate (93) is disposed at the other end of the rotating connecting plate (91) and is used to cooperate with the mounting hole on the assembly sleeve (3); And a drive cylinder I (94), whose cylinder body is hinged to the support frame (5), and whose output end is rotatably connected to the rotating connecting plate (91) to drive the conical positioning plate (93) to insert or exit the mounting hole, thereby achieving circumferential and axial positioning of the mounting sleeve (3).

6. The riveting device for magnesium alloy components of a kitchen fan according to claim 1, characterized in that, The top of the rotary table (2) has multiple sets of threaded holes (21), and the threaded holes (21) are connected to positioning rods (22) for contacting the inner wall of the assembly sleeve (3) to achieve radial positioning of the assembly sleeve (3).

7. The riveting device for magnesium alloy components of a kitchen fan according to claim 1, characterized in that, It also includes a lifting drive cylinder (14), which is fixed on the top of the machine body (1) and its output end is connected to the support base (16) to drive the support base (16) to lift.

8. The riveting device for magnesium alloy components of a kitchen fan according to claim 1, characterized in that, The top of the support base (16) is provided with a fixing hole (161), and a lower mold base (163) for supporting rivets is provided in the fixing hole (161). The cutting sleeve I (164) is sleeved on the outer wall of the lower mold base (163) and can slide relative to it.

9. The riveting device for magnesium alloy components of a kitchen fan according to claim 8, characterized in that, The outer wall of the lower mold base (163) is fitted with a spring I (165). The two ends of the spring I (165) abut against the bottom wall of the fixed mounting hole (161) and the bottom of the cutting sleeve I (164) respectively, so as to drive the cutting sleeve I (164) to reset.

10. The riveting device for magnesium alloy components of a kitchen fan according to claim 1, characterized in that, Also includes: The conveying guide rail (17) is fixed to the bottom of the support frame (5); The outer wall of the cutting sleeve II (63) is provided with a feeding channel (64) that communicates with the conveying guide rail (17) for receiving rivets from the vibrating feeder. And spring II (62), sleeved on the outer wall of the stamping rod (61), with its two ends abutting against the top of the stamping rod (61) and the cutting sleeve II (63) respectively, for the cutting sleeve II (63) to contact and cut the insulating strip (86) first before the stamping rod (61) when the pressing drive cylinder (6) is driven.

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