Rotary punching die for forming cylindrical mesh enclosure

Abstract

The utility model discloses a rotary punching die for forming a cylindrical 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 base, a movable positioning seat, a driving mechanism and a transmission mechanism; the base is provided with a bearing part used for bearing the cylindrical mesh enclosure, the bearing part is arranged in a suspended mode and horizontally extends front and back, the bearing part is cylindrical, and a plurality of punching grooves are formed in the top of the bearing part; the transmission mechanism is arranged in the base, and the output end of the transmission mechanism is exposed out of the front end face of the bearing part. The transmission mechanism is triggered by the triggering piece to intermittently operate, the transmission mechanism drives the cylindrical mesh enclosure to intermittently rotate by a fixed angle, then the cylindrical mesh enclosure is directly punched by the punching needle, the traditional mode that punching is conducted firstly and then rolling is conducted is replaced, the cylindrical mesh enclosure can be directly punched through the die, mesh holes are not prone to deformation, and the production efficiency is improved. The forming quality of the product is better, and the use requirement is met.

Description

Technical Field

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

[0002] Speaker grilles are important components of audio equipment. Depending on the design focus of the audio system, the function of the grille varies. In summary, there are several key points: 1. Speaker grilles primarily serve a decorative purpose; audio systems are often home furnishings, and aesthetics are important. 2. Speaker grilles provide dust protection. The grille traps most dust, protecting the speaker and making it easy to clean with a soft brush. 3. Speaker grilles protect the speaker cone from accidental impacts, prevent children from accidentally hitting the cone, and prevent spills like tea. 4. They filter out sharp noises. In relatively quiet environments, the ear is sensitive to subtle, sharp noises. For low-power home speakers, a grille can filter out some of these noises, with minimal impact on mid- and low-frequency frequencies.

[0003] Currently, cylindrical speaker grilles are used for cylindrical audio equipment. Existing technology involves punching mesh holes in a flat sheet of material, then rolling and assembling the sheet to form the cylindrical grille. This forming method is prone to mesh deformation during the rolling process, failing to meet usage requirements. Therefore, it is necessary to research a solution to address these problems. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a rotary punching die for forming cylindrical mesh covers, which can effectively solve the problem that the mesh holes are easily deformed when the existing cylindrical mesh covers are punched and rolled during production.

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

[0006] A rotary punching die for forming a cylindrical mesh cover includes a lower die and an upper die; the upper die is movably positioned directly above the lower die.

[0007] The lower mold includes a base, a movable positioning seat, a drive mechanism, and a transmission mechanism for rotating the cylindrical mesh cover. The base has a support portion for supporting the cylindrical mesh cover, which is suspended and extends horizontally back and forth. The support portion is cylindrical, and multiple punched slots are provided on the top of the support portion. The movable positioning seat is movably mounted on the base and located directly in front of the support portion. The drive mechanism is mounted on the base and drives the movable positioning seat to move back and forth, moving closer to or away from the support portion. The transmission mechanism is located inside the base, and the output end of the transmission mechanism protrudes from the front end face of the support portion.

[0008] The upper die includes an upper die base and multiple punch pins. The multiple punch pins are disposed inside the upper die base and can be movably exposed downwards on the bottom surface of the upper die base. The multiple punch pins are respectively located directly above multiple punching slots, and the upper die base is provided with a trigger element for triggering the input end of the transmission mechanism.

[0009] As a preferred embodiment, the supporting part has a discharge groove, the plurality of punching grooves are all located above the discharge groove and are all connected to the discharge groove, and the bottom of the base is provided with a discharge port, which is located below the discharge groove and is connected to the discharge groove, so as to quickly discharge the waste generated by punching.

[0010] As a preferred embodiment, the base is provided with a sliding groove; the transmission mechanism includes a transmission shaft, a connecting plate, a transmission gear, and a push rod; the transmission shaft is rotatably disposed within the base and suspended in the discharge chute, extending horizontally back and forth; the connecting plate is fixedly connected to the front end of the transmission shaft and protrudes from the front end face of the bearing portion, and the connecting plate is driven to rotate by the transmission shaft; the transmission gear is fixedly connected to the rear end of the transmission shaft and drives the transmission shaft to rotate; the push rod is slidably disposed in the sliding groove, and the push rod drives the transmission gear to rotate in one direction; the triggering element acts on the push rod to cause the push rod to move backward, resulting in a simple structure and stable and reliable operation.

[0011] As a preferred embodiment, the transmission gear is a one-way gear, and the bottom of the push rod has a first tooth. The orientation of the first tooth is opposite to that of the teeth of the one-way gear. The first tooth moves back and forth to intermittently drive the one-way gear to rotate, which has good reliability.

[0012] As a preferred embodiment, the rear end of the slide is provided with an elastic reset member that causes the push rod to slide forward and reset.

[0013] As a preferred embodiment, the connecting plate has multiple positioning posts on its periphery that mate with the positioning holes on the cylindrical mesh cover. All positioning posts extend forward, making the installation and positioning of the cylindrical mesh cover easier.

[0014] As a preferred embodiment, the top of the base is recessed with a guide hole that communicates with the slide groove. The trigger is adapted to the guide hole and moves up and down along the guide hole to move away from or towards the push rod, ensuring the reliability of operation.

[0015] As a preferred embodiment, the front end of the push rod is provided with a first inclined surface, and the lower end of the trigger is provided with a second inclined surface. The second inclined surface and the first inclined surface cooperate to abut against each other, resulting in a simple structure.

[0016] As a preferred embodiment, the base is provided with an anti-rotation component that can move up and down elastically to prevent the transmission gears from reversing, so as to more accurately punch the cylindrical mesh cover.

[0017] As a preferred embodiment, the top of the anti-rotation component has a second tooth, which is oriented opposite to the tooth of the one-way gear and engages with it, resulting in a simple structure.

[0018] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0019] By using a trigger to intermittently operate the transmission mechanism, which in turn drives the cylindrical mesh cover to rotate intermittently at a fixed angle, and then punches holes directly into the cylindrical mesh cover by a punching needle, this method replaces the traditional method of punching holes first and then rolling. This mold can directly punch holes into the cylindrical mesh cover, making the mesh holes less prone to deformation, resulting in better product molding quality and meeting the needs of use.

[0020] 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

[0021] Figure 1 This is a perspective view of a preferred embodiment of the present utility model;

[0022] Figure 2 This is a perspective view of another preferred embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional view of a preferred embodiment of the present invention;

[0024] Figure 4 yes Figure 3 Enlarged view of position A in the middle;

[0025] Figure 5 This is a partially exploded view of a preferred embodiment of the present invention;

[0026] Figure 6 yes Figure 5 Another perspective diagram.

[0027] Explanation of reference numerals in the attached diagram:

[0028] 10. Lower mold; 11. Base

[0029] 111. Bearing unit; 12. Movable positioning seat

[0030] 13. Drive mechanism 131. Piston rod

[0031] 14. Transmission Mechanism 141. Transmission Shaft

[0032] 142. Connecting plate; 143. Transmission gear

[0033] 144. Push rod; 145. Elastic reset component

[0034] 15. Anti-rotation component 151. Second tooth

[0035] 101. Punching groove; 102. Sliding groove

[0036] 103. Guide channel; 104. Discharge channel

[0037] 105. Discharge port; 106. Guide hole

[0038] 107. Positioning post; 108. First tooth

[0039] 109. First inclined plane; 20. Upper mold

[0040] 21. Upper mold base; 22. Punching pin

[0041] 23. Trigger 231. Second inclined plane

[0042] 30. Cylindrical mesh cover; 31. Positioning hole

[0043] 32. Mesh. Detailed Implementation

[0044] Please refer to Figures 1 to 6 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.

[0045] The lower mold 10 includes a base 11, a movable positioning seat 12, a drive mechanism 13, and a transmission mechanism 14 for rotating the cylindrical mesh cover 30. The base 11 has a support portion 111 for supporting the cylindrical mesh cover 30. The support portion 111 is suspended and extends horizontally back and forth. The support portion 111 is cylindrical, and its top has multiple punched slots 101. The movable positioning seat 12 is movably mounted on the base 11 and located directly in front of the support portion 111. The drive mechanism 13 is mounted on the base 11 and drives the movable positioning seat 12 to move back and forth, approaching or moving away from the support portion 111. The transmission mechanism 14 is located inside the base 11, and its output end protrudes from the front end face of the support portion 111. Specifically:

[0046] The base 11 has a sliding groove 102 and a guide groove 103, both extending forward and backward. The supporting portion 111 has a discharge groove 104. Multiple punched grooves 101 are located above and communicate with the discharge groove 104. A discharge port 105 is located below and communicates with the discharge groove 104 at the bottom of the base 11. Furthermore, a guide hole 106 is recessed at the top of the base 11 and communicates with the sliding groove 102.

[0047] The movable positioning seat 12 is slidably installed in the guide groove 103 and moves back and forth along the guide groove 103. The movable positioning seat 12 is used to prevent the cylindrical mesh cover 30 from moving forward and falling out.

[0048] The drive mechanism 13 is a drive cylinder, which can be a pneumatic cylinder or a hydraulic cylinder, etc. The drive mechanism 13 has a piston rod 131, which extends rearward, and the tail end of the piston rod 131 is fixedly connected to the movable positioning seat 12.

[0049] The transmission mechanism 14 includes a transmission shaft 141, a connecting plate 142, a transmission gear 143, and a push rod 144. The transmission shaft 141 is rotatably disposed within the base 11 and suspended in the discharge trough 104, extending horizontally back and forth. The connecting plate 142 is fixedly connected to the front end of the transmission shaft 141 and protrudes from the front end face of the bearing portion 111, and the connecting plate 142 is driven to rotate by the transmission shaft 141. The transmission gear 143 is fixedly connected to the rear end of the transmission shaft 141 and drives the transmission shaft 141 to rotate. The push rod 144 is slidably disposed in the slide groove 102, and the push rod 144 drives the transmission gear 143 to rotate unidirectionally. In this embodiment, the periphery of the surface of the connecting plate 142 is provided with a plurality of positioning posts 107 that mate with the positioning holes 31 on the cylindrical mesh cover 30, and the plurality of positioning posts 107 extend forward. The transmission gear 143 is a one-way gear. The bottom of the push rod 144 has a first tooth 108, the orientation of which is opposite to that of the teeth of the one-way gear. The first tooth 108 moves back and forth, intermittently rotating the one-way gear, so that the cylindrical mesh cover 30 rotates at the same angle each time. The front end of the push rod 144 is provided with a first inclined surface 109. Furthermore, the rear end of the slide groove 102 is provided with an elastic reset member 145 that causes the push rod 144 to slide forward and reset. The elastic reset member 145 can be a reset spring or the like, and is not limited thereto. Additionally, the base 11 is provided with an anti-rotation member 15 that can move elastically up and down to prevent the transmission gear 143 from reversing. The top of the anti-rotation member 15 has a second tooth 151, the orientation of which is opposite to that of the teeth of the one-way gear and engages with it to effectively prevent the transmission gear 143 from reversing.

[0050] The upper die 20 is movably positioned directly above the lower die 10. The upper die 20 includes an upper die base 21 and multiple punch pins 22. The punch pins 22 are disposed within the upper die base 21 and movably protrude downwards from the bottom surface of the upper die base 21. The punch pins 22 are respectively located directly above multiple punching slots 101. The upper die base 21 is provided with a trigger element 23 for triggering the input end of the transmission mechanism 14. In this embodiment, the trigger element 23 acts on the push rod 144, causing the push rod 144 to move backward. Furthermore, the trigger element 23 is adapted to the guide hole 106, and the trigger element 23 moves up and down along the guide hole 106 to move away from or towards the push rod 144. Additionally, the lower end of the trigger element 23 is provided with a second inclined surface 231, which engages and abuts against the first inclined surface 109.

[0051] The working principle of this embodiment is described in detail below:

[0052] First, install the mold onto the punch press, fix the lower die 10 to the press base, install and connect the upper die 20 to the punch press's stamping mechanism, and connect the drive mechanism 13 to the press's control system. Next, start the punch press. The stamping mechanism drives the upper die 20 upwards, separating it from the lower die 10. The drive mechanism 13 then drives the movable positioning seat 12 forward, away from the support portion 111. Next, the cylindrical mesh cover 30, without perforations on its outer periphery, is fitted onto the support portion 111 from front to back. After fitting, the positioning pin 107 engages with the positioning hole 31 on the cylindrical mesh cover 30. At this point, the transmission mechanism 14 drives the cylindrical mesh cover 30 to rotate on the support portion 111. Then, the drive mechanism 13... The movable positioning seat 12 is moved backward, so that the movable positioning seat 12 approaches the cylindrical mesh cover 30 and blocks and positions the cylindrical mesh cover 30. Then, the stamping mechanism drives the upper mold 20 to move downward, so that the upper mold 20 and the lower mold 10 are closed. During the mold closing process, the trigger 23 is first inserted into the guide hole 106. The trigger 23 causes the push rod 144 to move backward. Then, the push rod 144 moves the transmission gear 143 to rotate by a fixed angle. Then, the transmission shaft 141 drives and drives the connecting plate 142 to rotate by a fixed angle. Finally, the cylindrical mesh cover 30 is rotated by an angle on the bearing part 111. When the mold is closed, the multiple punching needles 22 can punch out mesh holes 32 in the local position of the cylindrical mesh cover 30 that has not been punched. Next, the stamping mechanism drives the upper die 20 to move upward, causing the upper die 20 to separate from the lower die 10. During the separation process, the multiple punching pins 22 first leave the lower die 10, then the trigger 23 leaves the lower die 10, and then the push rod 144 is reset forward and leaves the transmission gear 143 under the action of the elastic reset member 145. Then, the mold closing and opening are repeated multiple times. In each mold closing process, the transmission mechanism 14 first drives the cylindrical mesh cover 30 to rotate a fixed angle before punching, and so on until the punching is completed on the outer peripheral side of the cylindrical mesh cover 30. After the cylindrical mesh cover 30 is punched, and after the last mold opening, the drive mechanism 13 drives the movable positioning seat 12 to move forward and leave the support part 111. Then, the cylindrical mesh cover 30 with completed punching is pulled forward out of the support part 111.

[0053] The key design feature of this invention is that by using a trigger to intermittently operate the transmission mechanism, and then using the transmission mechanism to intermittently rotate the cylindrical mesh cover at a fixed angle, the punching needle directly punches the cylindrical mesh cover, replacing the traditional method of punching first and then rolling. This mold can directly punch the cylindrical mesh cover, the mesh holes are less likely to deform, the product molding quality is better, and it meets the needs of use.

[0054] 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 punching die for forming a cylindrical mesh cover, comprising a lower die and an upper die; the upper die is movably arranged above the lower die; characterized in that: the lower die comprises a base, a movable positioning seat, a driving mechanism and a transmission mechanism for driving the cylindrical mesh cover to rotate; the base is provided with a bearing part for bearing the cylindrical mesh cover, the bearing part is suspended and horizontally extends forward and backward, the bearing part is cylindrical, and a plurality of punching grooves are formed in the top of the bearing part; the movable positioning seat is movably arranged on the base and located in front of the bearing part; the driving mechanism is arranged on the base and drives the movable positioning seat to move forward and backward to approach or move away from the bearing part; the transmission mechanism is arranged in the base, and the output end of the transmission mechanism is exposed from the front end surface of the bearing part; the upper die comprises an upper die seat and a plurality of punching needles, the plurality of punching needles are arranged in the upper die seat and can be movably exposed from the bottom surface of the upper die seat, the plurality of punching needles are respectively located above the plurality of punching grooves, and the upper die seat is provided with a trigger for triggering the input end of the transmission mechanism. The bearing part is provided with a discharge groove, the plurality of punching grooves are located above the discharge groove and communicate with the discharge groove, and the bottom of the base is provided with a discharge port located below the discharge groove and communicating with the discharge groove. The base is provided with a sliding groove; the transmission mechanism comprises a transmission shaft, a connecting plate, a transmission gear and a push rod; the transmission shaft is rotatably arranged in the base and suspended in the discharge groove, and horizontally extends forward and backward; the connecting plate is fixedly connected with the front end of the transmission shaft and exposed from the front end surface of the bearing part, and the connecting plate is driven to rotate by the transmission shaft; the transmission gear is fixedly connected with the rear end of the transmission shaft and drives the transmission shaft to rotate; the push rod is slidably arranged in the sliding groove, and the push rod drives the transmission gear to rotate in one direction; the trigger acts on the push rod to move the push rod backward.

2. The rotary piercing die for molding a cylindrical mesh cover according to claim 1, characterized by: The transmission gear is a one-way gear, the bottom of the push rod is provided with first teeth, the direction of the first teeth is opposite to the direction of the teeth of the one-way gear, and the first teeth move forward and backward to intermittently drive the one-way gear to rotate.

3. The rotary piercing die for molding a cylindrical mesh cover according to claim 2, characterized by: The rear end of the sliding groove is provided with an elastic reset member for sliding the push rod forward to reset.

4. The rotary piercing die for molding a cylindrical mesh cover according to claim 3, characterized by: The surface of the connecting plate is provided with a plurality of positioning columns matched with the positioning holes on the cylindrical mesh cover, and the plurality of positioning columns extend forward.

5. The rotary piercing die for molding a cylindrical mesh cover according to claim 3, characterized by: The top of the base is recessed with a guide hole communicating with the sliding groove, the trigger is matched with the guide hole, and the trigger moves up and down along the guide hole to move away from or approach the push rod.

6. The rotary piercing die for molding a cylindrical mesh cover according to claim 3, characterized by: The front end of the push rod is provided with a first inclined surface, and the lower end of the trigger is provided with a second inclined surface matched with the first inclined surface.

7. The rotary piercing die for molding a cylindrical mesh cover according to claim 3, characterized by: The base is provided with an anti-rotation member which is elastically movable up and down and used for preventing the transmission gear from reversing.

8. The rotary piercing die for molding a cylindrical mesh cover according to claim 7, characterized by: The top of the anti-rotation member is provided with second teeth matched with and abutting against the teeth of the one-way gear.

9. The rotary piercing die for molding a cylindrical mesh cover according to claim 4, characterized by: ​ 10. The rotary piercing die for forming a cylindrical mesh enclosure according to claim 9, characterized by: ​

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