Rotary punching die for forming flat-plate-shaped mesh enclosure

Abstract

The utility model discloses a rotary punching die for forming a tabulate mesh enclosure. The rotary punching die comprises a lower die and an upper die, the upper die is arranged right above the lower die in a manner of moving up and down; the lower die comprises a bottom plate, a shell, a lower die base and a supporting base used for bearing the flat-plate-shaped mesh enclosure. The shell is arranged on the bottom plate and is provided with a containing cavity with an upward opening; the lower die base is arranged on the bottom plate and located in the containing cavity, a punching area is partially formed on the upper end face of the lower die base, and a plurality of punching grooves are formed in the punching area. The supporting seat is rotatably and movably arranged in the containing cavity, the supporting seat is annular and located on the periphery of the lower die holder, and a driving device is arranged on the shell and drives the supporting seat to rotate and move; the upper die comprises an upper die base and a plurality of punching needles, the punching needles are arranged in the upper die base and movably and downwards exposed out of the bottom face of the upper die base, and the punching needles are located over the punching area and directly face the punching grooves in the vertical direction.

Description

Technical Field

[0001] This utility model relates to the technology of mesh cover production and processing, and in particular to a rotary punching mold for forming flat mesh covers. Background Technology

[0002] Speaker grilles are an important component of audio equipment. Depending on the design focus of the audio system, the function of the grille varies. In summary, there are several key aspects: First, they serve a decorative purpose; audio systems are often home decorations, so an aesthetically pleasing appearance is important. Second, they provide dust protection; the grille traps most dust, which is beneficial for the speakers and makes cleaning easier with a soft brush. Third, they protect the speakers, preventing accidental impacts to the speaker cone, protecting it from children's play and spills like tea. Fourth, they filter out sharp noises; in relatively quiet rooms, the ear is sensitive to subtle, sharp sounds, and a grille on a low-power home speaker can effectively filter out some of these, with minimal impact on the mid and low frequencies.

[0003] During the production of mesh covers, punching dies are typically used to punch holes in metal sheets. This method allows for rapid production of mesh covers, facilitating the manufacturing process. In existing technology, the punching die for flat, circular mesh covers typically consists of a lower die and an upper die. The upper die is vertically movable and positioned directly above the lower die. The upper die contains a corresponding number of punching pins based on the number of mesh holes. Thus, the punching operation can be completed in a single die closing operation. While this die structure offers high punching efficiency, the punching pins are consumable parts. This results in a large number of punching pins being used, and the denser the mesh, the more punching pins are needed, leading to a high frequency of pin replacement and consequently, high operating costs. Furthermore, a larger number of punching pins also complicates the internal structure of the die, making maintenance more difficult. Therefore, it is necessary to improve current punching dies. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology and its main objective is to provide a rotary punching die for forming flat mesh covers, which can effectively solve the problems of high operating costs and inconvenient maintenance of existing punching dies.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A rotary punching die for forming a flat mesh cover includes a lower die and an upper die. The upper die is movably disposed above the lower die. The lower die includes a base plate, a shell, a lower die base, and a support for supporting the flat mesh cover. The shell is disposed on the base plate and has an upward-facing accommodating cavity. The lower die base is disposed on the base plate and located in the accommodating cavity. A punching area is partially formed on the upper end face of the lower die base, and multiple punching slots are formed in the punching area. The support is rotatably disposed in the accommodating cavity. The support is annular and located around the lower die base. A driving device is disposed on the shell, which drives the support to rotate. The upper die includes an upper die base and multiple punching pins. The multiple punching pins are disposed inside the upper die base and movably protrude downward from the bottom surface of the upper die base. The multiple punching pins are located directly above the punching area and are respectively vertically aligned with the multiple punching slots.

[0007] As a preferred embodiment, the housing is provided with an installation cavity, which is located beside and communicates with the receiving cavity. The driving device includes a transmission mechanism and a drive motor. The transmission mechanism is located in the installation cavity, and the drive motor is fixed to the housing. The drive motor drives the support to rotate through the transmission mechanism. The structure is simple, the operation is stable and reliable, and the precision is high.

[0008] As a preferred embodiment, a material discharge groove is formed through the upper and lower surfaces of the base plate. The material discharge groove is located directly below and connected to the multiple punching grooves to facilitate the automatic discharge of waste generated after stamping.

[0009] As a preferred embodiment, the upper surface of the support base is provided with a plurality of fixing posts on the inner periphery, which are distributed around the outer periphery of the lower mold base to facilitate the quick and easy installation of the flat mesh cover.

[0010] As a preferred embodiment, a sensor is provided on the housing, and a trigger plate for triggering the sensor is provided on the outer periphery of the upper surface of the support. When the trigger plate moves close to the sensor as the support rotates and triggers the sensor, the sensor sends a signal to the control system, which then controls the drive device to stop working for automated control.

[0011] As a preferred embodiment, the upper surface of the support base is provided with multiple positioning holes, which are evenly spaced around the rotation center of the support base. Correspondingly, the bottom of the upper mold base is provided with multiple positioning pins, which are engaged with the multiple positioning holes for positioning, so that the upper mold and the lower mold can achieve precise mold closing.

[0012] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0013] By using a drive device to rotate the support base, the flat mesh cover can rotate with the support base. In this way, the punching operation of the flat mesh cover can be completed after multiple rotations and mold closings using this mold. This greatly reduces the number of punching pins used, and the punching pins are not easily damaged, reducing the frequency of punching pin replacement, thereby greatly reducing the operating cost of the punching mold. At the same time, the reduction in the number of punching pins also simplifies the internal structure of the punching mold, making daily maintenance more convenient.

[0014] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a three-dimensional assembly diagram of a preferred embodiment of the present invention;

[0016] Figure 2 This is a cross-sectional view of a preferred embodiment of the present invention;

[0017] Figure 3 This is a three-dimensional schematic diagram of the combination of the lower mold and the flat mesh cover in a preferred embodiment of the present invention;

[0018] Figure 4 This is a three-dimensional schematic diagram of the lower mold and the flat mesh cover separated in a preferred embodiment of the present invention.

[0019] Explanation of reference numerals in the attached diagram:

[0020] 10. Lower mold 11. Base plate

[0021] 12. Outer shell 13. Lower mold base

[0022] 131. Punching area; 14. Support seat

[0023] 15. Drive unit 151. Transmission mechanism

[0024] 152. Drive motor; 16. Sensor

[0025] 17. Trigger plate 101, receiving cavity

[0026] 102. Punching slot; 103. Blanking chute

[0027] 104. Mounting cavity; 105. Fixing column

[0028] 106, Positioning hole 20, Upper mold

[0029] 21. Upper mold base; 22. Punching pin

[0030] 201, Positioning Post 30, Flat Mesh Cover

[0031] 31. Fixing hole. Detailed Implementation

[0032] Please refer to Figures 1 to 4 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, including a lower mold 10 and an upper mold 20.

[0033] The lower die 10 includes a base plate 11, a housing 12, a lower die base 13, and a support base 14 for supporting the flat mesh cover 30. The housing 12 is disposed on the base plate 11 and has an upward-facing accommodating cavity 101. The lower die base 13 is disposed on the base plate 11 and located in the accommodating cavity 101. A punched area 131 is partially formed on the upper end surface of the lower die base 13, and a plurality of punched grooves 102 are formed in the punched area 131. The support base 14 is rotatably disposed in the accommodating cavity 101. The support base 14 is annular and located around the lower die base 13. A driving device 15 is disposed on the housing 11, which drives the support base 14 to rotate. In this embodiment, a material discharge groove 103 is formed through the upper and lower surfaces of the base plate 11. The material discharge groove 103 is located directly below and communicates with the plurality of punched grooves 102 to facilitate automatic discharge of waste generated after stamping. The housing 12 has a mounting cavity 104 located beside and communicating with the receiving cavity 101. The driving device 15 includes a transmission mechanism 151 and a drive motor 152. The transmission mechanism 151 is located in the mounting cavity 104, and the drive motor 152 is fixed to the housing 12. The drive motor 152 drives the support seat 14 to rotate through the transmission mechanism 151. The structure is simple and the operation is stable and reliable. The transmission mechanism 151 can be composed of a transmission shaft and various gears and gear discs. The gear disc can be fixed on the outer periphery of the support seat 14. The specific structure and working principle of the transmission mechanism 151 are existing technologies, and the specific structure and working principle of the transmission mechanism 151 will not be described in detail here. Furthermore, a sensor 16 is provided on the outer casing 12, and a trigger piece 17 for triggering the sensor 16 is provided on the outer periphery of the upper surface of the support base 14. When the trigger piece 17 rotates with the support base 14 and approaches and triggers the sensor 16, the sensor 16 sends a signal to the control system, which then controls the drive device 15 to stop working for automated control. In this embodiment, there are two sensors 16, and correspondingly, there are also two trigger pieces 17, but this is not a limitation. In addition, a plurality of fixing posts 105 are provided on the inner periphery of the upper surface of the support base 14. These fixing posts 105 are distributed around the outer periphery of the lower mold base 13 to facilitate quick and easy installation of the flat mesh cover 30. Furthermore, a plurality of positioning holes 106 are provided on the upper surface of the support base 14, and these positioning holes 106 are evenly spaced in a circle around the rotation center of the support base 14.

[0034] The upper mold 20 is movably positioned directly above the lower mold 10. Specifically, the upper mold 20 includes an upper mold base 21 and a plurality of punch pins 22. The plurality of punch pins 22 are disposed within the upper mold base 21 and movably protrude downwards from the bottom surface of the upper mold base 21. The plurality of punch pins 22 are located directly above the punching area 131 and are respectively vertically aligned with the plurality of punching slots 102. In this embodiment, the bottom of the upper mold base 21 is provided with a plurality of positioning pins 201. The plurality of positioning pins 201 are engaged with a plurality of positioning holes 106 for positioning, so that the upper mold 20 and the lower mold 10 can achieve precise mold closing.

[0035] The working principle of this embodiment is described in detail below:

[0036] First, the mold is installed on the punch press. The lower mold 10 is fixed on the press base, and the upper mold 20 is installed and connected to the punch press's stamping mechanism. The drive device 15 and sensor 16 are both connected to the press's control system. Next, the press is started. The stamping mechanism drives the upper mold 20 upward, separating it from the lower mold 10. Then, the flat mesh cover 30 without punched holes is placed on the support seat 14 of the lower mold 10. After it is in place, the multiple fixing posts 105 are inserted into the corresponding fixing holes 31 around the periphery of the flat mesh cover 30, allowing the flat mesh cover 30 to rotate due to the support seat 14. Then, the stamping mechanism drives the upper mold 20 downward, closing it with the lower mold 10. After closing, the multiple punching pins 22 can punch holes in the local area of ​​the flat mesh cover 30 without punched holes. After the mesh is punched, the upper die 20 is moved upward by the stamping mechanism, causing the upper die 20 to separate from the lower die 10. Then, the drive device 15 drives the support seat 14 to rotate at an angle, and the flat mesh cover 30 rotates at an angle with the support seat 14, so that the flat mesh cover 30 moves to another part of the punching position directly below the multiple punching pins 22. When the trigger plate 17 triggers the sensor 16, the control system controls the drive device 15 to stop working. At this time, the flat mesh cover 30 rotates to the position. Then, the stamping mechanism drives the upper die 20 to move downward, so that the upper die 20 and the lower die 10 close the mold. After the mold closes, the multiple punching pins 22 can punch mesh holes in another part of the flat mesh cover 30 that has not been punched. By performing multiple rotation and punching cycle actions, the punching and forming operation of the entire flat mesh cover 30 can be completed.

[0037] The key design feature of this invention is that by using a driving device to rotate the support base, the flat mesh cover can rotate with the support base. In this way, the punching operation of the flat mesh cover can be completed after multiple rotations and mold closings using this mold. This greatly reduces the number of punching pins used, and the punching pins are not easily damaged, reducing the frequency of punching pin replacement, thereby greatly reducing the operating cost of the punching mold. At the same time, the reduction in the number of punching pins also simplifies the internal structure of the punching mold, making daily maintenance more convenient.

[0038] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A rotary piercing die for forming a flat panel-shaped screen, comprising a lower die and an upper die; the upper die is movably arranged on the top of the lower die; characterized in that: The lower die comprises a bottom plate, a shell, a lower die base and a support base for bearing a flat plate-shaped mesh cover; the shell is arranged on the bottom plate and has an upward opening accommodating cavity; the lower die base is arranged on the bottom plate and located in the accommodating cavity, and the upper end face of the lower die base is partially formed with a punching area, and a plurality of punching grooves are formed in the punching area; the support base is rotatably arranged in the accommodating cavity, the support base is annular and located at the outer periphery of the lower die base, and the shell is provided with a driving device, which drives the support base to rotate; the upper die comprises an upper die base and a plurality of punching needles, the plurality of punching needles are arranged in the upper die base and can be movably exposed to the bottom surface of the upper die base, the plurality of punching needles are located directly above the punching area and are respectively vertically opposite to the plurality of punching grooves.

2. The rotary piercing die for molding a flat plate-shaped mesh cover according to claim 1, characterized by: The shell is provided with a mounting cavity, which is located beside the accommodating cavity and communicates with the accommodating cavity, the driving device comprises a transmission mechanism and a driving motor, the transmission mechanism is arranged in the mounting cavity, and the driving motor is fixed on the shell, the driving motor drives the support base to rotate through the transmission mechanism.

3. The rotary piercing die for molding a flat plate-shaped mesh cover according to claim 1, characterized by: The upper and lower surfaces of the bottom plate are formed with a blanking groove, which is located directly below the plurality of punching grooves and communicates with the plurality of punching grooves.

4. The rotary piercing die for molding a flat plate-shaped mesh cover according to claim 1, characterized by: The outer periphery of the upper surface of the support base is provided with a plurality of fixing columns, and the plurality of fixing columns are distributed around the outer periphery of the lower die base.

5. The rotary piercing die for molding a flat plate-shaped mesh cover according to claim 1, characterized by: The shell is provided with an inductor, and the outer periphery of the upper surface of the support base is provided with a trigger piece for triggering the inductor.

6. The rotary piercing die for molding a flat plate-shaped mesh cover according to claim 1, characterized by: The upper surface of the support base is provided with a plurality of positioning holes, and the plurality of positioning holes are equally arranged around the rotation center of the support base, and correspondingly, the bottom of the upper die base is provided with a plurality of positioning columns, and the plurality of positioning columns are matched and inserted with the plurality of positioning holes.

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