Aluminum shell side wall explosion-proof mold structure and explosion-proof test method

Abstract

The invention belongs to the technical field of aluminum electrolytic capacitor aluminum shell production equipment, and particularly relates to an aluminum shell side wall anti-explosion mold structure and an anti-explosion testing method.The aluminum shell side wall anti-explosion mold structure comprises an upper mold and a lower mold, a plurality of bolt holes are horizontally formed in the side portion of the lower mold, and the bolt holes communicate with anti-explosion core grooves formed in the lower mold vertically and downwards; an explosion-proof core is inserted into the explosion-proof core groove and is locked in the explosion-proof core groove through a bolt in threaded connection with the bolt hole, and the top of the explosion-proof core is opposite to or crossed with the mold core at the bottom of the upper mold. Anti-explosion treatment of the side wall of the aluminum shell is achieved, the problems of cost and maintenance caused by overall replacement due to abrasion of the mold are solved, the structure of the mold is simplified, the maintenance flexibility is improved, the limitation of an existing mold on multiple styles and specifications of the aluminum shell is solved, standardization and unification of the mold are achieved, and the production efficiency is improved. Therefore, the development trend and the market demand of the aluminum electrolytic capacitor are met.

Description

Technical Field

[0001] The invention belongs to the technical field of producing aluminum shell equipment for aluminum electrolytic capacitors, and particularly relates to an aluminum shell side wall explosion-proof mold structure and an explosion-proof testing method. Background Art

[0002] As the most basic electronic component, aluminum electrolytic capacitors are widely used in various circuits such as distillation, filtering, bypassing, and coupling. With the development of surface mount technology and electronic component products towards high reliability and long life, users have also put forward requirements for aluminum electrolytic capacitors such as small size, chip-type, high performance, long life, and low loss. As the main component of aluminum electrolytic capacitors, aluminum shells need to be treated with explosion-proof treatment during the production process and given explosion-proof characteristics, so that the aluminum shell can release the ability to explode under high pressure, thereby protecting the capacitor and external accessories when the aluminum electrolytic capacitor is abnormal. Since the depth of the explosion-proof groove of the aluminum shell is one of the important indicators for measuring the technical parameters of aluminum electrolytic capacitors, the explosion-proof groove is too deep and it is very easy to cause the aluminum shell to be punctured. When it is too shallow, it is very easy to cause a safety accident due to the overload of the electrolytic capacitor. In order to control the depth of the explosion-proof groove, the height of the explosion-proof core has been adjusted. This method needs to be adjusted according to operating experience, and the operability is low, and it is difficult to guarantee the quality of aluminum shell production.

[0003] In the prior art, there are studies on the problem of adjusting the depth of explosion-proof grooves by adjusting the height of explosion-proof cores, such as patent application CN207615453U - an explosion-proof aluminum shell forming mold, which realizes the precise adjustment of the explosion-proof core in the explosion-proof concave mold through an explosion-proof core adjustment device, solving the problem of low operability of the current method of adjusting the height of the explosion-proof core. Although the existing explosion-proof aluminum shell forming mold can improve the quality and production efficiency of the product to a certain extent, it is difficult to achieve mold standardization for various styles and specifications of aluminum shells, making it difficult to meet the development trend and market demand of aluminum electrolytic capacitors, and the existing explosion-proof forming mold has a complex structure, and the processing and manufacturing costs are relatively high, and it is difficult to ensure the flexibility of maintenance. To this end, a new technical solution is needed to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide an aluminum shell side wall explosion-proof mold structure and an explosion-proof testing method to solve the problems raised in the above background technology that the current explosion-proof aluminum shell forming mold is difficult to standardize for various styles and specifications of aluminum shells, making it difficult to meet the development trend and market demand of aluminum electrolytic capacitors, and the existing explosion-proof forming mold has a complex structure, relatively high processing and manufacturing costs, and it is difficult to ensure maintenance flexibility.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an explosion-proof mold structure for the side wall of an aluminum shell, comprising an upper mold and a lower mold, a plurality of bolt holes being horizontally opened on the side of the lower mold, the bolt holes being connected to an explosion-proof core groove vertically opened downward inside the lower mold, an explosion-proof core being inserted into the explosion-proof core groove, a sinking groove being extended at the top of the explosion-proof core groove, the sinking groove being matched with the upper clearance of the explosion-proof core, the explosion-proof core being locked in the explosion-proof core groove by bolts threadedly connected to the bolt holes and the top of the core is opposite to or cross-arranged with the core at the bottom of the upper mold, the top of the core is connected to a rotating mechanism and is connected to the upper mold through the rotating mechanism, and the rotating mechanism allows the core to be rotated and adjusted relative to the upper mold.

[0006] Furthermore, a chamfered surface is provided on both sides of the upper part of the explosion-proof core, and the tops of the two chamfered surfaces meet to form a tip, and the tip is arranged opposite to or cross-arranged with the mold core.

[0007] Furthermore, the mold core is rotatably adjusted relative to the upper mold through a rotating mechanism to be arranged opposite to the tip of the explosion-proof core or to be cross-arranged at a predetermined angle.

[0008] Furthermore, one end of the lower mold is set with the aluminum shell through its cylindrical structure, and a threaded hole is opened on the end face of the other end of the lower mold and an air pump is threadedly connected through the threaded hole; the interior of the lower mold is penetrated by an air hole connected with the threaded hole; the gas generated by the air pump is transmitted to the interior of the lower mold through the threaded hole and the air hole, and the aluminum shell is pushed out along the axial direction of the lower mold by the gas pressure; a guide limit platform is set at the bottom of the end of the lower mold with the threaded hole, and is fixed to the lower mold fixing seat of the explosion-proof equipment through the guide limit platform.

[0009] The explosion-proof mold structure of the aluminum shell side wall set up above is used to perform an explosion-proof test on the aluminum shell side wall, and the specific test steps are as follows: first, fix the upper mold in the mold handle hole of the explosion-proof equipment, fix the lower mold on the lower mold fixing seat of the explosion-proof equipment, and connect the output pipe of the air pump to the threaded hole of the lower mold, and ensure that the output pipe is connected to the air hole; secondly, put the aluminum shell on the cylindrical structure of the lower mold, and then use the hydraulic control system to punch the explosion-proof core of the lower mold with the core of the upper mold, and perform explosion-proof treatment on the side wall of the aluminum shell to form an explosion-proof groove; finally, the gas pressure generated by the air pump is transmitted to the inside of the lower mold through the threaded holes and the air holes, and pushes the aluminum shell out smoothly along the axial direction of the lower mold until the aluminum shell is completely separated from the lower mold.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a design of locking the explosion-proof core in the explosion-proof core groove with bolts, so that the explosion-proof core has a detachable function, so that when the explosion-proof core is worn, the mold structure only needs to replace the explosion-proof core without replacing the entire mold, which simplifies the structure of the mold, greatly reduces the manufacturing and maintenance costs of the mold, improves the flexibility and maintainability of the mold, and reduces the downtime of the aluminum shell in the production process. At the same time, it also realizes the precise adjustment of the explosion-proof core in the explosion-proof core groove without relying on operating experience, greatly improves the convenience and accuracy of operation, can more effectively control the depth of the explosion-proof groove, and ensures the quality of aluminum shell production By controlling the size of the lower die and the connection between the bolt hole and the explosion-proof core groove, the die structure can process aluminum shell products with different outer diameters under the action of the same explosion-proof core, breaking the limitations of the existing die for various styles and specifications of aluminum shells, and realizing the standardization and unification of the die, thereby meeting the development trend and market demand of aluminum electrolytic capacitors. The explosion-proof core of the lower die and the core of the upper die are set opposite or crosswise, making the side wall of the aluminum shell more flexible and efficient in the process of explosion-proof treatment, ensuring the uniformity of the force on the aluminum shell, helping to reduce the deformation and defects of the aluminum shell, and ensuring the quality and consistency of the product; 2. The present invention adopts the design of extending the sinking groove at the top of the explosion-proof core groove, which provides a more stable supporting environment for the explosion-proof core, reduces the shaking or deviation of the explosion-proof core during the stamping process, thereby improving the accuracy and consistency of the explosion-proof groove. By setting the design of beveled surfaces on both sides of the upper part of the explosion-proof core, the explosion-proof core can distribute the pressure more evenly during stamping, effectively avoiding the deformation or damage of the aluminum shell caused by excessive local pressure. The setting of the tip formed by the intersection of the tops of the two beveled surfaces can more accurately locate the position of the explosion-proof groove, ensuring the reliability of the explosion-proof effect; 3. The present invention allows the mold core to be rotated and adjusted relative to the upper mold through a rotating mechanism, so that the mold structure can adapt to aluminum shells of different specifications or shapes, thereby improving the flexibility and versatility of the mold, and also realizing the precise alignment of the explosion-proof groove and the side wall of the aluminum shell, further improving the quality and consistency of the product, reducing the generation of defective and waste products, and improving the utilization rate of raw materials and the qualified rate of products; 4. The present invention utilizes a mechanism that uses gas pressure to push the aluminum shell out along the axial direction of the lower mold. Compared with the traditional mechanical pushing method, the gas pushing has a more uniform and gentle driving force, which can reduce damage to the aluminum shell and the mold, and improve the integrity and quality of the product. The design that the air holes that penetrate the lower mold are connected to the threaded holes forms an efficient gas transmission channel inside the lower mold, ensuring that the gas generated by the gas pump can be quickly and accurately transmitted to the lower mold, so as to effectively push the aluminum shell. By adjusting the output pressure and flow of the gas pump, the driving force and pushing speed of the gas can be accurately controlled, thereby achieving precise control of the aluminum shell pushing process, reducing manual intervention and downtime, and improving production efficiency. By setting a guide limit platform at the bottom of one end of the lower mold where the threaded hole is opened, it not only fixes and limits the lower mold, but also ensures the stable operation of the mold in the explosion-proof equipment, effectively preventing the mold from shaking or shifting under the push of high-pressure gas, and ensuring the processing accuracy and safety of the product; 5. The present invention utilizes the mold structure to perform explosion-proof tests on the side walls of the aluminum shell, thereby achieving precise control of the explosion-proof grooves on the side walls of the aluminum shell, effectively avoiding safety issues such as aluminum shell breakdown or inability to open due to improper depth of the explosion-proof grooves, reducing scrap rates, improving production efficiency, and ensuring the safety and reliability of aluminum electrolytic capacitors during use, thereby improving the product quality and market competitiveness of aluminum electrolytic capacitors. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the side structure of the lower mold of the present invention; Figure 2 for Figure 1 The left side cross-sectional structure diagram of the middle and lower molds; Figure 3 for Figure 2 Schematic diagram of the enlarged structure of the A area in the middle; Figure 4 for Figure 1 Schematic diagram of the right side cross-section structure of the middle and lower molds; Figure 5 It is a schematic diagram of the side structure of the upper mold of the present invention; Figure 6 for Figure 5 Schematic diagram of the structure viewed from above; Figure 7 It is a schematic diagram of the front structure of the explosion-proof core of the present invention; Figure 8 for Figure 7 A schematic diagram of the side structure of Fig. 9 for Figure 8 Schematic diagram of the structure of area B in the middle.

[0012] Among them: 1. Upper die; 2. Lower die; 3. Bolt hole; 4. Explosion-proof core groove; 5. Explosion-proof core; 6. Sinking groove; 7. Beveled surface; 8. Tip; 9. Core; 10. Rotating mechanism; 11. Threaded hole; 12. Air hole; 13. Guide limit platform. DETAILED DESCRIPTION

[0013] The following examples are used to further illustrate the content of the present invention, but do not limit the application of the present invention.

[0014] See also Figure 1-Figure 9 The present invention provides an explosion-proof mold structure for the side wall of an aluminum shell, comprising an upper mold 1 for stamping and a lower mold 2 for fixing the aluminum shell, a plurality of bolt holes 3 are horizontally opened on the side of the lower mold 2, the bolt holes 3 are connected with an explosion-proof core groove 4 vertically opened inside the lower mold 2 and used to install an explosion-proof core 5, an explosion-proof core 5 for explosion-proof treatment is inserted into the explosion-proof core groove 4, and a sinking groove 6 is extended on the top of the explosion-proof core groove 4 to prevent the explosion-proof core 5 from shaking or deflecting during stamping (the explosion-proof core groove 4 and the sinking groove 6 are formed by slow wire cutting, and the sinking groove 6 is wider than the explosion-proof core groove 4, and the cutting edge has a chamfered arc setting, such as Figure 2-Figure 3 As shown in the figure, the sinking groove 6 is matched with the upper gap of the explosion-proof core 5, and a chamfered surface 7 for dispersing the stamping pressure is arranged on both sides of the upper part of the explosion-proof core 5. The tops of the two chamfered surfaces 7 meet to form a tip 8 (the explosion-proof core 5 is sheet-shaped and the top end is gradually tapered to form a tip at the top, as shown in the figure). Figure 7-Figure 9 As shown, the explosion-proof core 5 has high toughness after vacuum quenching treatment and is stable and does not deform after multiple stampings. Its smooth surface can accurately match the explosion-proof core groove 4). The explosion-proof core 5 is locked in the explosion-proof core groove 4 by a bolt threadedly connected to the bolt hole 3; a mold core 9 for stamping the explosion-proof core 5 is provided at the bottom of the upper mold 1 (the mold core 9 is a vertical sheet structure cut out by wire, which cooperates with the explosion-proof core 5 of the lower mold 2 to adjust the vertical direction, such as Figure 5-Figure 6 As shown), the top of the mold core 9 is connected to a rotating mechanism 10 and is connected to the upper mold 1 through the rotating mechanism 10. The rotating mechanism 10 allows the mold core 9 to be rotated and adjusted relative to the upper mold 1, so that the mold core 9 can be rotated relative to the upper mold 1 through the rotating mechanism 10 and can be adjusted to be opposite to the tip 8 of the explosion-proof core 5 or cross-set at a predetermined angle.

[0015] See also Figure 1-Figure 4, one end of the lower mold 2 is set with an aluminum shell (the functions and structures of conventional equipment such as aluminum shells are well known in the art, and the connection settings are also common knowledge, so no further explanation is given here, and it is not shown in the drawings) through its cylindrical structure, and a threaded hole 11 for connecting an air pump is opened on the end surface of the other end of the lower mold 2, and an air pump for providing air pressure is threadedly connected through the threaded hole 11 (the functions and structures of conventional equipment such as air pumps are well known in the art, and the connection settings are also common knowledge, so no further explanation is given here, and it is not shown in the drawings); The lower mold 2 has an air hole 12 connected to the threaded hole 11, so that the gas generated by the air pump is transmitted to the lower mold 2 through the threaded hole 11 and the air hole 12, and the aluminum shell is pushed out along the axial direction of the lower mold 2 by the gas pressure; A guide limit platform 13 for limiting is provided at the bottom of one end of the lower mold 2 with a threaded hole 11, and the lower mold fixing seat of the explosion-proof equipment is limited and fixed by the guide limit platform 13 (the functions and structures of conventional equipment such as the lower mold fixing seat provided on the explosion-proof equipment are well known in the art, and the connection settings are also common knowledge, so no further explanation is given here and it is not shown in the accompanying drawings), so that the lower mold 2 can ensure that the explosion-proof core groove 4 is accurately perpendicular to the entire plane after being fixed.

[0016] The working principle and use process of the present invention are as follows: Figure 1-Figure 9 As shown in the figure, after the explosion-proof mold structure is assembled, the operator fixes the upper mold 1 of the structure in the mold handle hole of the explosion-proof equipment (the functions and structures of conventional equipment such as the mold handle hole set on the explosion-proof equipment are well known in the art, and the connection settings are also common knowledge, so no further explanation is given here, and it is not shown in the drawings), and the lower mold 2 is fixed to the lower mold fixing seat of the explosion-proof equipment, and the output pipe of the air pump is connected to the threaded hole 11 of the lower mold 2, and it is ensured that the output pipe of the air pump is connected to the air hole 12, so that the explosion-proof treatment of the side wall of the aluminum shell can be achieved, which not only solves the cost and maintenance problems caused by the overall replacement of the mold due to wear, simplifies the structure of the mold, improves the flexibility of maintenance, but also solves the limitations of the existing mold for various styles and specifications of the aluminum shell, and realizes the standardization and unification of the mold, thereby meeting the development trend and market demand of aluminum electrolytic capacitors; When the side wall of the aluminum shell needs to be treated with explosion-proof treatment, the operator first inserts the explosion-proof core 5 into the explosion-proof core groove 4 and locks it with bolts, and then determines the shape of the explosion-proof groove according to the technical requirements of the explosion-proof of the side wall of the aluminum shell, and then adjusts the setting relationship between the mold core 9 and the tip 8 of the explosion-proof core 5 through the rotating mechanism 10, and then sets the aluminum shell to be tested on the cylindrical structure of the lower mold 2 without threaded holes 11 and the end of the guide limit platform 13, and then uses the hydraulic control system (the functions and structures of conventional equipment such as hydraulic control systems are well known in the art, and the connection settings are also common knowledge, and Chinese patent authorization announcement No. CN207 can also be used 615453U discloses an explosion-proof aluminum shell forming mold, so no further explanation is given here and it is not shown in the accompanying drawings) The core 9 of the upper mold 1 is punched into the explosion-proof core 5 of the lower mold 2, and the side wall of the aluminum shell sleeved on the lower mold 2 is subjected to explosion-proof treatment, so that a predetermined explosion-proof groove is formed on the side wall of the aluminum shell, and then the air pump is turned on to allow the gas generated by the air pump to be transported to the air hole 12 through the threaded hole 11, and then transmitted to the interior of the lower mold 2 through the air hole 12, so that the aluminum shell sleeved on the lower mold 2 is smoothly pushed out along the axial direction of the lower mold 2 under the action of the gas pressure, until the aluminum shell is completely separated from the lower mold 2, and the explosion-proof treatment of the side wall of the aluminum shell is completed.

Claims

1. An explosion-proof mold structure for the side wall of an aluminum shell, comprising an upper mold and a lower mold, characterized in that: A plurality of bolt holes are horizontally opened on the side of the lower mold, and the bolt holes are connected to an explosion-proof core groove opened vertically downward inside the lower mold. An explosion-proof core is inserted into the explosion-proof core groove, and the explosion-proof core is locked in the explosion-proof core groove by bolts threaded into the bolt holes, and the top of the explosion-proof core is opposite to or cross-arranged with the mold core at the bottom of the upper mold.

2. The aluminum shell side wall explosion-proof mold structure according to claim 1, characterized in that: The top of the explosion-proof core groove is extended with a sinking groove, and the sinking groove is arranged in cooperation with the upper gap of the explosion-proof core.

3. The aluminum shell side wall explosion-proof mold structure according to claim 2, characterized in that: A chamfered surface is respectively arranged on both sides of the upper part of the explosion-proof core, and the tops of the two chamfered surfaces meet to form a tip, and the tip is arranged opposite to or cross-arranged with the mold core.

4. The aluminum shell side wall explosion-proof mold structure according to claim 3, characterized in that: The top of the mold core is connected to a rotating mechanism and is connected to the upper mold through the rotating mechanism. The rotating mechanism allows the mold core to be rotated and adjusted relative to the upper mold.

5. The aluminum shell side wall explosion-proof mold structure according to claim 4, characterized in that: The mold core is rotatably adjusted relative to the upper mold through a rotating mechanism to be opposite to the tip of the explosion-proof core or to be cross-arranged at a predetermined angle.

6. The aluminum shell side wall explosion-proof mold structure according to claim 1, characterized in that: One end of the lower mold is set with the aluminum shell through its cylindrical structure, and the other end surface of the lower mold is provided with a threaded hole and an air pump is threadedly connected through the threaded hole.

7. The aluminum shell side wall explosion-proof mold structure according to claim 6, characterized in that: The lower die has an air hole extending therethrough and communicating with the threaded hole.

8. The explosion-proof mold structure for the side wall of an aluminum shell according to claim 7, characterized in that: The gas generated by the gas delivery pump is transmitted to the interior of the lower mold through the threaded holes and the air holes, and the aluminum shell is pushed out along the axial direction of the lower mold by the gas pressure.

9. The explosion-proof mold structure for the side wall of an aluminum shell according to claim 6, characterized in that: A guide limiting platform is arranged at the bottom of one end of the lower die with a threaded hole, and the lower die is fixed on the lower die fixing seat of the explosion-proof equipment through the guide limiting platform.

10. An explosion-proof test method for the side wall of an aluminum shell, characterized in that: An explosion-proof test is performed on the side wall of the aluminum shell using an explosion-proof mold structure for the side wall of the aluminum shell as described in any one of claims 1 to 9, and the specific test steps are as follows: first, the upper mold is fixed in the mold handle hole of the explosion-proof equipment, the lower mold is fixed on the lower mold fixing seat of the explosion-proof equipment, and the output pipe of the air pump is connected to the threaded hole of the lower mold, and it is ensured that the output pipe is connected to the air hole; secondly, the aluminum shell is mounted on the cylindrical structure of the lower mold, and then the hydraulic control system is used to punch the explosion-proof core of the lower mold with the mold core of the upper mold, and the side wall of the aluminum shell is subjected to explosion-proof treatment to form an explosion-proof groove; finally, the gas pressure generated by the air pump is transmitted to the inside of the lower mold through the threaded holes and the air holes, and the aluminum shell is pushed out smoothly along the axial direction of the lower mold until the aluminum shell is completely separated from the lower mold.

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