A grooving aluminum nail and a method for manufacturing the same

Abstract

This invention discloses a slotted aluminum nail and its preparation method, belonging to the field of battery cover technology. The slotted aluminum nail is made of aluminum alloy material, with an intermediate connector in the middle. An annular groove is provided between the outer side of the intermediate connector and the outer wall of the slotted aluminum nail, and a groove is provided at the bottom of the slotted aluminum nail. The slotted aluminum nail of this invention is made of aluminum alloy material, especially AL3003H14 material, which has high strength and good weldability. While ensuring sufficient structural strength, it significantly reduces the overall weight, which is beneficial to the lightweight design of battery cover. The slotted aluminum nail of this invention, by setting the annular groove and the bottom groove, can form a reliable positioning and locking structure during the assembly process, preventing loosening or falling off and improving connection reliability. The stamping process is used, combined with dimensional inspection, ultrasonic cleaning, and CCD appearance inspection to ensure that the edges of the aluminum nail are flat, free of deformation, burrs, and scratches, meeting high precision requirements.

Description

Technical Field

[0001] This invention relates to the field of battery cover technology, and more particularly to a grooved aluminum nail and its preparation method. Background Technology

[0002] Currently, metal connectors are commonly used in battery cover structures to achieve conductivity, sealing, or fixation functions. Traditionally, these connectors are mostly made of copper or stainless steel. Although copper connectors have good conductivity, they are dense and heavy, which is not conducive to the development of lightweight batteries; stainless steel connectors, on the other hand, have problems such as high processing difficulty and poor welding compatibility with aluminum shells.

[0003] In terms of manufacturing processes, existing aluminum nails are mostly formed by turning or cold heading, which has defects such as low processing efficiency, low material utilization, and easy formation of burrs or scratches on the surface. At the same time, traditional processes lack effective control over the cleanliness of the aluminum nail surface, and residual oil or particles may affect the welding quality and sealing performance of the battery cover.

[0004] Therefore, how to provide a slotted aluminum nail structure that is lightweight, high-strength, has good processing accuracy, reliable assembly, and is suitable for battery cover environments, as well as its efficient preparation method, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a slotted aluminum nail and its preparation method. Through reasonable structural design and manufacturing process, the slotted aluminum nail achieves lightweighting while possessing good structural strength by using aluminum alloy material. High precision and excellent surface quality are obtained through precision stamping, and structural features such as annular grooves improve assembly reliability. The result is a slotted aluminum nail that is lightweight, high-strength, has good processing accuracy, reliable assembly, and is suitable for battery cover environments.

[0006] To achieve the above objectives, the present invention provides a slotted aluminum nail, which is made of aluminum alloy material. The slotted aluminum nail has an intermediate connecting body in the middle, and an annular groove is provided between the outer side of the intermediate connecting body and the outer wall of the slotted aluminum nail. The bottom of the intermediate connecting body of the slotted aluminum nail has a groove.

[0007] Preferably, a circular groove is provided at the top center of the intermediate connector.

[0008] Preferably, the edges of the intermediate connector are rounded, the top of the inner wall of the slotted aluminum nail is also rounded, and the bottom of the annular groove of the slotted aluminum nail is also rounded.

[0009] Preferably, the grooved aluminum nail also has rounded corners at the wall position where the groove is located.

[0010] Preferably, the slotted aluminum nail is integrally formed.

[0011] Preferably, the outer surface edge of the grooved aluminum nail is flat, without deformation, burrs, or scratches.

[0012] Preferably, the slotted aluminum nail is made of AL3003H14 material.

[0013] The present invention discloses a method for preparing grooved aluminum nails, comprising the following steps: Step 1: Prepare aluminum coil materials. The materials should be aluminum coils made of aluminum alloy. Step 2: Install the aluminum coil. Install the aluminum coil on the unwinding machine, and gradually feed the end of the aluminum coil onto the stamping machine. Step 3, stamping: Under the action of the mold and stamping blade on the stamping machine, the aluminum coil is gradually stamped into semi-finished products in the shape of individual slotted aluminum nails. Step four, dimensional inspection: Inspectors use 2D measuring instruments, calipers, micrometers, and height gauges to inspect the semi-finished products. Step 5: Ultrasonic cleaning. After inspection, place the grooved aluminum nails into the ultrasonic cleaner. Step 6: Perform visual inspection, using a CCD camera to inspect the entire sample of the slotted aluminum nails; Step 7: Pack and box the items for storage, and count the number of slotted aluminum nails in each box. Step 8: Conduct outbound inspection and deliver the goods.

[0014] Preferably, the ultrasonic cleaning machine has an ultrasonic frequency of 40kHz-80kHz, a cleaning temperature of 50℃-65℃, and a cleaning time of 2 minutes-5 minutes.

[0015] The advantages and positive effects of the grooved aluminum nail and its preparation method described in this invention are as follows: 1. The slotted aluminum nail of the present invention is made of aluminum alloy material, especially AL3003H14 material, which has high strength and good weldability and formability; while ensuring sufficient structural strength, it significantly reduces the overall weight, which is conducive to the lightweight design of the battery cover and improves the battery energy density.

[0016] 2. The slotted aluminum nail of the present invention, by setting an annular groove and a bottom groove, enables the slotted aluminum nail to form a reliable positioning and locking structure during the assembly process, preventing loosening or falling off and improving the connection reliability.

[0017] 3. The annular groove and multiple rounded corners of the grooved aluminum nail of the present invention effectively reduce stress concentration, improve the fatigue resistance of the aluminum nail when subjected to impact or vibration, and reduce the risk of fracture.

[0018] 4. This invention adopts a stamping process, combined with dimensional inspection, ultrasonic cleaning and CCD appearance inspection, to ensure that the aluminum nail edges are flat, without deformation, burrs and scratches, and to meet the requirements of high-precision assembly.

[0019] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a slotted aluminum nail according to the present invention; Figure 2 This is a front view of a slotted aluminum nail according to the present invention; Figure 3 This is a cross-sectional view of a slotted aluminum nail according to the present invention; Figure 4 This is a flowchart illustrating the manufacturing process of a grooved aluminum nail according to the present invention.

[0021] Figure Labels 1. Grooved aluminum nail; 2. Circular groove; 3. Circular groove; 4. Groove. Detailed Implementation

[0022] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing the invention and for 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, they should not be construed as limitations on the invention. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In this application, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. In case of any inconsistency, the meaning set forth in this specification or derived from the content described herein shall prevail. Furthermore, the terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit the scope of this application.

[0024] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0025] like Figures 1-4As shown, the present invention provides a slotted aluminum nail 1, which is made of aluminum alloy material. A middle connecting body is provided in the middle of the slotted aluminum nail 1, and an annular groove 2 is provided between the outer side of the middle connecting body and the outer wall of the slotted aluminum nail 1. A groove 4 is provided at the bottom of the middle connecting body of the slotted aluminum nail 1.

[0026] A circular groove 3 is provided at the top center of the intermediate connector.

[0027] The edges of the intermediate connector are rounded, the top of the inner wall of the slotted aluminum nail 1 is also rounded, and the bottom of the annular groove of the slotted aluminum nail 1 is also rounded.

[0028] The grooved aluminum nail 1 also has rounded corners at the wall position where the groove 4 is located.

[0029] The slotted aluminum nail 1 is integrally formed.

[0030] Specifically, the slotted aluminum nail 1 is directly formed from a single sheet of aluminum alloy blank through a stamping process, without the need for subsequent welding, riveting or other assembly processes.

[0031] The outer surface of the grooved aluminum nail 1 is flat, without deformation, burrs, or scratches.

[0032] The slotted aluminum nail 1 is made of AL3003H14 material.

[0033] Specifically, AL3003H14 material represents an aluminum-manganese alloy, and H14 represents the work-hardened state of the slotted aluminum nail 1.

[0034] Specifically, the dimensions of one of the slotted aluminum nails in Embodiment 1 are as follows: d1 is 7.72mm with a tolerance of 0.03mm; d2 is 7.12mm with a tolerance of 0.05mm; d3 is 0.2mm; d4 is 0.90mm with a tolerance of 0.03mm; and d5 is 4.1mm.

[0035] Specifically, the dimensions of the other grooved aluminum nail 1 in Embodiment Two are as follows: d1 is 5.87mm with a tolerance of 0.05mm; d2 is 5.0mm with a tolerance of 0.1mm; d3 is 0.2mm; d4 is 0.80mm with a tolerance of 0.05mm; and d5 is 2.5mm. The rounded corner at the top of the annular groove 2 is 0.5mm, and the rounded corner at the bottom of the annular groove 2 is 0.2mm.

[0036] The present invention discloses a method for preparing grooved aluminum nails, comprising the following steps: Step 1: Prepare aluminum coils. The incoming materials are aluminum coils made of aluminum alloy.

[0037] Step 2: Install the aluminum coil. Install the aluminum coil on the unwinding machine, and gradually feed the end of the aluminum coil onto the stamping machine.

[0038] Specifically, the coiled aluminum alloy strip is mounted on the expansion and contraction drum of the unwinding machine and tensioned, and the feeder is started. Under the precise control of the servo motor, the unwinding machine actively rotates and releases the aluminum coil. After being adjusted by the limit rollers and the leveling device, the end of the strip is intermittently and stably fed into the die cavity of the stamping machine by the feeder at a set step length.

[0039] Step 3, stamping: Under the action of the mold and stamping blade on the stamping machine, the aluminum coil is gradually stamped into semi-finished products in the shape of individual slotted aluminum nails.

[0040] Specifically, in one stroke of the stamping press, the strip material undergoes multiple processes, including punching. Among them, the stamping blade cooperates with the die cavity to punch out the basic shapes of the annular groove, the central circular groove 3, and the bottom groove 4 on the strip material. Finally, the aluminum coil strip is punched and separated through the blanking process to form semi-finished products of slotted aluminum nails 1 with complete structural features.

[0041] Step four, dimensional inspection: Inspectors use 2D measuring instruments, calipers, micrometers, and height gauges to inspect the semi-finished products.

[0042] Specifically, height gauges are mainly used to measure the height, depth, flatness, or parallelism of objects.

[0043] Step 5: Ultrasonic cleaning. After inspection, place the grooved aluminum nail 1 into the ultrasonic cleaner.

[0044] Step 6: Perform visual inspection by using a CCD camera to inspect the entire sample of the slotted aluminum nail 1.

[0045] Specifically, during visual inspection, the ultrasonically cleaned and dried slotted aluminum nails 1 are arranged in an orderly manner on an automatic feeding tray and transported to the station of the CCD vision inspection system. The CCD camera takes high-speed photos of each slotted aluminum nail 1 from multiple angles, including the top, side, and bottom, capturing its surface image. The system automatically detects whether there are defects such as scratches, indentations, burrs, deformation, oil stains, or color differences on the outer surface of the aluminum nail through a preset image recognition algorithm, and compares them with a standard template to automatically determine whether the product is qualified.

[0046] Specifically, a 2D measuring instrument is a device used to measure angles, diameters, radii, distances from points to lines, eccentricities of two circles, and distances between two points.

[0047] Step 7: Pack and box the items for storage, and count the quantity of each box containing slotted aluminum nails 1.

[0048] Specifically, once the number of slotted aluminum nails 1 reaches the set quantity, the automatic box sealing machine seals the packaging box and affixes a product label containing information such as product model, quantity, production batch and inspection status. Finally, the packaging box is stacked and put into storage.

[0049] Step 8: Conduct outbound inspection and deliver the goods.

[0050] Specifically, before finished products leave the warehouse, quality inspectors conduct random inspections according to product inspection standards. The inspection includes the appearance quality of the grooved aluminum nails, key dimensions (such as outer diameter, depth of the annular groove, and bottom groove dimensions), and packaging integrity. After passing the inspection, a product certificate of conformity and a shipment inspection report are issued, and logistics labels are affixed according to customer requirements. Finally, the outbound procedures are completed, and the product is handed over to the logistics company for shipment.

[0051] Specifically, the ultrasonic cleaning machine has an ultrasonic frequency of 40kHz-80kHz, a cleaning temperature of 50℃-65℃, and a cleaning time of 2-5 minutes.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. 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 still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A trenching aluminum spike, characterized by: The slotted aluminum nail (1) is made of aluminum alloy material. A middle connecting body is provided in the middle of the slotted aluminum nail (1). An annular groove (2) is provided between the outer side of the middle connecting body and the outer wall of the slotted aluminum nail (1). A groove (4) is provided at the bottom of the middle connecting body of the slotted aluminum nail (1).

2. The slotted aluminum rivet of claim 1, wherein: A circular groove (3) is provided at the top center of the intermediate connector.

3. The slotted aluminum rivet of claim 2, wherein: The edge of the intermediate connector is rounded, the top of the inner wall of the slotted aluminum nail (1) is also rounded, and the bottom of the annular groove of the slotted aluminum nail (1) is also rounded.

4. The slotted aluminum rivet of claim 3, wherein: The grooved aluminum nail (1) also has rounded corners at the wall position where the groove (4) is located.

5. The slotted aluminum rivet of claim 1, wherein: The slotted aluminum nail (1) is integrally formed.

6. The slotted aluminum rivet of claim 1, wherein: The outer surface edge of the grooved aluminum nail (1) is flat, without deformation, burrs, or scratches.

7. The slotted aluminum rivet of claim 1, wherein: The slotted aluminum nail (1) is made of AL3003H14 material.

8. A method of manufacturing a slotted aluminum rivet as claimed in any one of claims 1-7, characterized in that: Includes the following steps, Step 1: Prepare aluminum coil materials. The materials should be aluminum coils made of aluminum alloy. Step 2: Install the aluminum coil. Install the aluminum coil on the unwinding machine, and gradually feed the end of the aluminum coil onto the stamping machine. Step 3, stamping. Under the action of the mold and stamping blade on the stamping machine, the aluminum coil is gradually stamped into a semi-finished product in the shape of a slotted aluminum nail (1). Step four, dimensional inspection: Inspectors use 2D measuring instruments, calipers, micrometers, and height gauges to inspect the semi-finished products. Step 5, ultrasonic cleaning. After inspection, place the grooved aluminum nail (1) into the ultrasonic cleaner. Step 6: Perform visual inspection and use a CCD camera to inspect the entire sample of the slotted aluminum nail (1). Step 7: Pack and store the products, and count the number of slotted aluminum nails (1) per box. Step 8: Conduct outbound inspection and deliver the goods.

9. The method of claim 8, wherein: The ultrasonic cleaner has an ultrasonic frequency of 40kHz-80kHz, a cleaning temperature of 50℃-65℃, and a cleaning time of 2-5 minutes.

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