A car lamp radiator stamping riveting combined production line and a novel radiator

Abstract

This utility model discloses a stamping and riveting assembly line for automotive headlight radiators and a novel radiator. The production line includes a first continuous die stamping unit, a second continuous die stamping unit, a riveting unit, and a conveying device. The first unit sequentially includes units for guide hole punching, riveting protrusion punching, outer edge trimming, and base plate cutting. The second unit sequentially includes units for outer edge punching, positioning hole punching, stamping bending, and heat sink fin cutting. The riveting unit includes a riveting punch and a support rod to achieve reliable riveting between the heat sink base plate and the heat sink fins. The riveting protrusion punching unit includes a pressure-bearing template, a protrusion punch, clearance holes, and a limiting rod, and preferably includes a top rod to prevent material jamming. This utility model achieves fully automated radiator production, with high efficiency and low cost. The connection between the heat sink base plate and the heat sink fins is firm, resulting in excellent heat dissipation performance, making it suitable for large-scale production of automotive headlight radiators.

Description

Technical Field

[0001] This utility model relates to the technical field of radiator processing equipment, and in particular to a stamping and riveting assembly production line for automotive lamp radiators and a novel radiator processed by the production line. Background Technology

[0002] Vehicle headlights generate a significant amount of heat when illuminated, especially LED headlights, whose luminous efficiency is closely related to thermal management. If this heat cannot be dissipated effectively and promptly, the internal temperature of the headlight will continue to rise. Excessive temperatures accelerate the aging and light decay of internal optical components and electronic drive elements, shortening the headlight's lifespan. High temperatures can also cause thermal deformation or even melting damage to internal plastic components, affecting structural integrity and sealing. In extreme cases, accumulated heat may become an ignition source, igniting surrounding flammable components and posing a potential safety hazard.

[0003] Currently, there are two main manufacturing processes for radiators: one is to use aluminum profiles to obtain the approximate shape through sawing, and then mill the final heat sink and mounting structure using CNC machine tools; the other is to use aluminum blocks to initially form the shape through cold forging, and then perform precision machining. However, these two traditional processing methods have low material utilization rates, especially since machining generates a large amount of waste, leading to raw material waste. Secondly, the processing steps are numerous and the process is lengthy, involving multiple machines and multiple clamping operations, resulting in extended production time and low efficiency. Furthermore, they rely on expensive CNC equipment and specialized molds, resulting in high initial investment and unit processing costs. These factors collectively restrict the production cost and economics of radiators, making it difficult to meet the automotive industry's demand for large-scale, high-efficiency, and low-cost production.

[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a stamping and riveting assembly production line for automotive headlight radiators and a new type of radiator to solve the above problems.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solution of this utility model and facilitating the understanding of those skilled in the art. It should not be assumed that the above content is known to those skilled in the art simply because it has been described in the background section of this utility model. Utility Model Content

[0006] To overcome the shortcomings of the prior art, the present invention aims to disclose a stamping and riveting assembly production line for vehicle headlight radiators and a new type of radiator.

[0007] This utility model discloses a stamping and riveting assembly production line for vehicle headlight radiators, comprising:

[0008] The first progressive die stamping unit is provided with a guide hole punching unit, a riveting protrusion punching unit, an outline trimming unit, and a base plate cutting and blanking unit in sequence along the conveying direction. The guide hole punching unit is used to punch the positioning guide holes on the heat dissipation base plate, the riveting protrusion punching unit is used to punch out the connecting posts on the heat dissipation base plate, the outline trimming unit is used to punch out the outline edge of the heat dissipation base plate, and the base plate cutting and blanking unit is used to separate the processed heat dissipation base plate from the material strip.

[0009] The second progressive die stamping unit is provided with an outline punching unit, a positioning hole punching unit, a stamping and bending unit, and a heat sink cutting and blanking unit in sequence along the conveying direction. The outline punching unit is used to punch out the outer contour of the heat sink, the positioning hole punching unit is used to punch out positioning holes on the heat sink, the stamping and bending unit is used to bend the sheet-like heat sink into a specified shape, and the heat sink cutting and blanking unit is used to separate the processed heat sink from the material strip.

[0010] The riveting unit includes a riveting punch and a riveting support rod arranged opposite each other; the riveting support rod is used to support the connecting column from the back, and the riveting punch is used to complete the riveting of the connecting column and the positioning hole.

[0011] A conveying device, connecting the first continuous die stamping unit, the second continuous die stamping unit, and the riveting unit, is used to convey workpieces between them;

[0012] The riveting protrusion stamping unit includes a pressure-bearing template, a protrusion punch above the pressure-bearing template, and clearance holes at corresponding positions of the pressure-bearing template and the protrusion punch, with a limiting top rod inside the clearance holes.

[0013] The preferred technical solution: The pressure-bearing template is also provided with a mounting hole, and a top rod is installed in the mounting hole. An elastic element is provided between the bottom of the top rod and the pressure-bearing template, and the front end of the top rod can extend to the outside of the mounting hole under the action of the elastic element. This design can automatically lift the material strip after stamping, so that the connecting column stamped on the heat dissipation base plate is completely separated from the pressure-bearing template, preventing the material strip from being stuck by the connecting column during the conveying process.

[0014] Preferred technical solution: The ejector pin and the punch are staggered in the conveying direction of the first progressive die stamping unit. This layout avoids interference and ensures that the connecting post stamped on the heat dissipation base plate does not affect the ejector pin during conveying.

[0015] Preferred technical solution: The front end of the top material rod is provided with a round head to prevent the top material rod from scratching the material belt during the material conveying process.

[0016] Preferred technical solution: The top of the riveting punch is provided with an arc-shaped groove, which can better shape the rivet point during riveting, making the rivet joint shape regular and the connection firm.

[0017] Preferred technical solution: Both the first and second progressive die stamping units are equipped with conveying mechanisms, which are parallel transmission belts set on both sides of the material. The first and second progressive die stamping units are connected to the riveting unit through a robotic arm to realize material transfer. This achieves automatic and precise material transfer.

[0018] Preferred technical solution: A hole chamfering and punching unit is provided between the riveting protrusion stamping unit and the outline trimming unit. This unit is used to chamfer certain mounting holes and remove burrs.

[0019] Preferred technical solution: A strip cutting unit is provided behind the heat sink cutting and unloading unit in the conveying direction. It is used to cut off excess strip at the end of the production line or during mold change.

[0020] A new type of radiator is manufactured by the above-mentioned automotive radiator stamping and riveting assembly production line. It includes a heat dissipation base plate stamped by a first continuous die stamping unit and heat dissipation fins stamped by a second continuous die stamping unit. The heat dissipation base plate is provided with connecting posts stamped by a riveting protrusion stamping unit, and the heat dissipation fins are provided with positioning holes stamped by a positioning hole punching unit. The connecting posts are riveted and fixed to the positioning holes.

[0021] Preferred technical solution: The heat dissipation base plate and heat sink are made of AL1070 aluminum alloy. AL1070 has excellent thermal conductivity and ductility, making it very suitable for stamping and heat dissipation applications.

[0022] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0023] This invention utilizes two progressive die stamping units to process the heat dissipation base plate and heat sink fins respectively, and links them with a riveting unit via a conveying device, achieving fully automated production from coil material to finished product, greatly improving production efficiency. The progressive die ensures consistency in workpiece processing at different workstations; the connecting post formed by the riveting protrusion stamping unit has a flat-topped columnar structure, which allows the connecting post to be stably and vertically inserted into the positioning hole of the heat sink fin, significantly improving the positioning accuracy before riveting; simultaneously, the uniform columnar structure ensures a more balanced force and plastic deformation at each riveting point during riveting, thus guaranteeing uniform and consistent connection strength in the final product. Combined with a dedicated riveting unit, a strong and reliable physical connection between the heat dissipation base plate and heat sink fins is achieved, with low contact thermal resistance and good heat dissipation performance. The design of the limiting ejector rod and ejector rod in the riveting protrusion stamping unit effectively prevents material deformation and die sticking during stamping, ensuring the forming quality of the connecting post. The arc-shaped groove of the riveting punch makes the riveted joint forming more perfect. Compared to die casting, stamping and riveting processes have lower mold costs, produce products without internal pores, and offer superior thermal conductivity. The radiator of this invention features a simple structure, reliable connection, and long service life. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the first continuous die stamping unit in this utility model;

[0026] Figure 2 This is a schematic diagram of the riveting protrusion stamping unit in Embodiment 1;

[0027] Figure 3 This is a schematic diagram of the riveting protrusion stamping unit in Embodiment 2;

[0028] Figure 4 This is a schematic diagram of the layout of the clearance hole and the top rod in Embodiment 2;

[0029] Figure 5 This is a schematic diagram of the structure of the second continuous die stamping unit in this utility model;

[0030] Figure 6 This is a flowchart illustrating the bending process of the heat sink in the stamping and bending unit of this utility model.

[0031] Figure 7 This is a schematic diagram of the riveting unit in this utility model;

[0032] Figure 8 This is an assembly diagram of the heat sink base plate and heat sink before riveting.

[0033] Figure 9 This is an assembly diagram showing the heat sink base plate and heat sink fins after riveting.

[0034] In the attached figures above, 1. First progressive die stamping unit; 11. Guide hole punching unit; 12. Riveting protrusion punching unit; 121. Pressure-bearing template; 122. Protrusion punch; 123. Clearance hole; 124. Limiting ejector rod; 125. Ejector rod; 126. Elastic element; 13. Outline trimming unit; 14. Base plate cutting and blanking unit; 15. Hole chamfering punching unit; 2. Second progressive die stamping unit; 21. Outline punching unit; 22. Positioning hole punching unit; 23. Stamping and bending unit; 24. Heat sink cutting and blanking unit; 25. Strip cutting unit; 3. Riveting unit; 31. Riveting punch; 311. Arc-shaped groove; 32. Riveting support rod; 4. Heat dissipation base plate; 41. Connecting column; 5. Heat sink; 51. Positioning hole. Detailed Implementation

[0035] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and their synonyms, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0037] In this application, the terms "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this utility model and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0038] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0039] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," "fitting," and "fitting" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Similarly, "fitting" can mean completely or partially fitted. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] Example 1:

[0042] like Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, this utility model discloses a stamping and riveting assembly production line for automotive headlight radiators, comprising a first continuous die stamping unit 1, a second continuous die stamping unit 2, a riveting unit 3, and a conveying device. The main components of this utility model will be described in detail below:

[0043] The first progressive die stamping unit 1 is used to form the heat dissipation base plate 4. Its working process is as follows: after the coil is fed into the unit, the guide hole punching unit 11 first punches out guide holes for precise positioning; then, the riveting protrusion punching unit 12 punches out cylindrical connecting posts 41 at predetermined positions on the base plate; then, the material passes through the hole chamfering punching unit 15 to chamfer and deburr some of the mounting holes; after that, the outline trimming unit 13 punches out the preliminary outline of the heat dissipation base plate 4; finally, the base plate cutting and unloading unit 14 completely cuts and separates the formed heat dissipation base plate 4 from the material strip.

[0044] The second continuous die stamping unit 2 is used to form the heat sink 5. Its workflow is as follows: after another aluminum coil is fed into the unit, the basic shape of the heat sink 5 is first punched out by the outline punching unit 21; then, the positioning hole punching unit 22 punches out positioning holes 51 that precisely correspond to the positions of the connecting posts 41 on the heat sink base plate 4; next, the stamping and bending unit 23 bends the sheet-like heat sink to increase its structural rigidity and heat dissipation area; finally, the heat sink cutting and unloading unit 24 cuts and separates the formed heat sink 5 from the strip. At the end of the unit, the strip cutting unit 25 is used to cut the waste strip for easy recycling and management.

[0045] The conveying device is responsible for transferring workpieces throughout the production line. Specifically, both the first progressive die stamping unit 1 and the second progressive die stamping unit 2 are equipped with conveying mechanisms consisting of parallel drive belts to achieve step-by-step material transfer within the units. Material transfer between the various units and the riveting unit 3 is accomplished by a robotic arm. The robotic arm precisely picks up the unloaded heat dissipation base plate 4 and heat sink 5 and transfers them to the riveting station.

[0046] The riveting unit 3 includes an upper riveting punch 31 and a lower riveting support rod 32. During operation, the heat sink 5 is stacked on the heat sink base plate 4, ensuring that the connecting post 41 passes through the positioning hole 51. The riveting support rod 32 provides support from below by pressing against the base of the connecting post 41. Then, the riveting punch 31 moves downwards, using its arc-shaped groove 311 at its tip to apply pressure to the top of the connecting post 41, causing plastic deformation and forming a well-shaped, strong-locking riveting joint, thereby firmly bonding the heat sink base plate 4 and the heat sink 5 into a single unit. It should be noted that the diameter of the riveting support rod 32 is not greater than the diameter of the connecting post 41.

[0047] The riveting protrusion stamping unit 12 includes a pressure-bearing template 121 with a vertically movable protrusion punch 122 mounted on top of it. A clearance hole 123 is provided on the pressure-bearing template 121, directly opposite the protrusion punch 122, and a limiting rod 124 is installed within the hole. The limiting rod 124 engages with the clearance hole 123 to ensure that all stamped connecting posts 41 have the same height and shape.

[0048] Example 2: Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 To further improve production flow, a mounting hole is provided on the pressure-bearing template 121, into which a push rod 125 is installed. An elastic element 126 is provided between the bottom of the push rod 125 and the pressure-bearing template 121, allowing the front end of the push rod 125 to protrude beyond the mounting hole under the action of the elastic element 126 in its natural state. After the punch 122 completes its stamping and returns, the push rod 125 is lifted upwards by the spring force, pushing the strip away from the pressure-bearing template 121, completely separating the stamped connecting post 41 from the clearance hole 123, ensuring smooth transport of the strip to the next workstation.

[0049] To avoid interference, the ejector rod 125 and the punch 122 are staggered in the conveying direction. Additionally, the front end of the ejector rod 125 is preferably rounded to prevent scratching the workpiece surface during the lifting process.

[0050] This embodiment also discloses a novel radiator manufactured using the above-described production line.

[0051] The new type of heat sink consists of two parts: a heat sink base plate 4 and heat sink fins 5. Several connecting posts 41 are stamped onto the heat sink base plate 4. These connecting posts 41 are flat-topped columnar structures stamped by the riveting protrusion stamping unit 12. This structure allows them to be stably and vertically inserted into the corresponding positioning holes 51 on the heat sink fins 5, ensuring precise positioning. Finally, the tops of the connecting posts 41 are riveted and deformed by the riveting unit 3, forming a reliable mechanical connection.

[0052] Preferably, both the heat dissipation base plate 4 and the heat sink 5 are made of AL1070 aluminum alloy. This material has extremely high thermal conductivity and excellent plasticity, making it very suitable for stamping and ensuring the overall thermal conductivity of the heat sink.

[0053] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A production line for stamping and riveting automotive headlight radiators, characterized in that, include: The first continuous die stamping unit is provided with a guide hole punching unit, a riveting protrusion punching unit, an outer edge trimming unit and a bottom plate cutting and blanking unit in sequence along the conveying direction. The second continuous die stamping unit is provided with an outline punching unit, a positioning hole punching unit, a stamping and bending unit and a heat sink cutting and blanking unit in sequence along the conveying direction. A riveting machine unit, comprising riveting punches and riveting support rods arranged vertically opposite each other; A conveying device, connecting the first continuous die stamping unit, the second continuous die stamping unit, and the riveting unit, is used to convey workpieces between them; The riveting protrusion stamping unit includes a pressure-bearing template, a protrusion punch above the pressure-bearing template, and a clearance hole at the corresponding position of the pressure-bearing template and the protrusion punch. A limiting top rod is provided in the clearance hole.

2. The automotive headlight radiator stamping and riveting assembly production line according to claim 1, characterized in that: The pressure-bearing template is also provided with a mounting hole, and a top material rod is provided in the mounting hole. An elastic element is provided between the bottom of the top material rod and the pressure-bearing template, and the front end of the top material rod can extend to the outside of the mounting hole under the action of the elastic element.

3. The automotive headlight radiator stamping and riveting assembly production line according to claim 2, characterized in that: The ejector rod and the protruding punch are staggered in the conveying direction of the first progressive die stamping unit.

4. The automotive headlight radiator stamping and riveting assembly production line according to claim 2, characterized in that: The front end of the top material rod is provided with a round head.

5. The automotive headlight radiator stamping and riveting assembly production line according to claim 1, characterized in that: The top of the riveting punch is provided with an arc-shaped groove.

6. The automotive headlight radiator stamping and riveting assembly production line according to claim 1, characterized in that: Both the first and second continuous die stamping units are equipped with conveying mechanisms, which are parallel transmission belts arranged on both sides of the material. The first and second continuous die stamping units are connected to the riveting unit through a robotic arm to realize material transfer.

7. The automotive headlight radiator stamping and riveting assembly production line according to claim 1, characterized in that: A hole chamfering punching unit is provided between the riveting protrusion stamping unit and the outer shape cutting unit.

8. The automotive headlight radiator stamping and riveting assembly production line according to claim 1, characterized in that: A material strip cutting unit is provided behind the conveying direction of the heat sink cutting and feeding unit.

9. A novel radiator, manufactured using the stamping and riveting assembly production line for automotive lamp radiators as described in any one of claims 1 to 8, characterized in that: It includes a heat dissipation base plate stamped by a first continuous die stamping unit and a heat dissipation fin stamped by a second continuous die stamping unit. The heat dissipation base plate is provided with a connecting post, and the heat dissipation fin is provided with a positioning hole. The connecting post is riveted to the positioning hole for fixation.

10. The novel radiator according to claim 9, characterized in that: The heat dissipation base plate and heat sink are made of AL1070 aluminum alloy.

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