Horn cover stamping device

Abstract

The invention relates to the technical field of metal plate stamping covers, discloses a trumpet cover stamping device and solves the problems that in existing stamping machining of a trumpet-shaped circular cover, annular wafers of different models are located at different heights when a lower die is sleeved with the annular wafers, it is inconvenient to ensure that the annular wafers are placed in a horizontal state, and the stamping quality of the annular wafers is likely to be affected. According to the annular wafer stamping die, flexible adjustment is carried out through a supporting table assembly and a guide rod in the supporting mechanism according to the size of an annular wafer, it is guaranteed that the annular wafers of different models can be kept in the horizontal state before stamping, the lower die is accurately sleeved with the annular wafers, stamping defects caused by inclination of the annular wafers are effectively avoided, the consistency of product quality is improved, and secondly, the production efficiency is improved. The adjusting unit enables the annular wafer to vibrate in the stamping process through cooperation of a vibration rod and an elastic piece, the moving flexibility when the annular wafer makes contact with the inclined face of the lower die is enhanced, and it is further ensured that the annular wafers of different models can be kept in the horizontal state before stamping.

Description

Technical Field

[0001] The invention relates to the technical field of metal plate stamping, in particular to a speaker cover stamping device. Background Art

[0002] The trumpet-shaped dome is a common industrial component, typically formed from a metal annular disc through a stamping process. The stamping process primarily consists of a frustoconical lower die and a corresponding upper die. The lower surface of the upper die is equipped with a stamping groove that matches the lower die. During the stamping process, the annular disc is first placed horizontally over the curved surface of the lower die. The upper die then applies pressure toward the lower die, deforming the disc into a trumpet-shaped dome with the same inclination as the curved surface of the lower die. This trumpet-shaped dome is widely used in applications such as hoppers near feed inlets and reducers.

[0003] The design of the truncated cone-shaped lower die is highly flexible and can produce a variety of trumpet-shaped domes with different diameters but consistent inclinations, as long as the upper and lower diameters of the trumpet domes are within the upper and lower diameter ranges of the truncated cone-shaped lower die. During the stamping process, the upper die preferentially contacts the edge of the annular disc, and then further squeezes the disc to deform it. However, different types of annular discs will be at different heights when they are placed on the surface of the lower die. In order to ensure the quality of stamping, it is necessary to ensure that the placement of the annular disc on the lower die remains horizontal. If the placement of the annular disc is offset, the pressure exerted by the upper die on the edge of the disc will be uneven, which will eventually lead to the deformed trumpet-shaped dome not meeting the standards. Therefore, for different types of annular discs placed on the lower die, it is necessary to ensure that their placement is horizontal to ensure that the punched trumpet-shaped dome meets the design requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a trumpet cover stamping device, which solves the problem that in the existing trumpet-shaped circular cover stamping process, different types of annular discs are at different heights when they are sleeved on the lower mold, which makes it inconvenient to ensure that the annular discs are placed in a horizontal state and easily affects the stamping quality of the annular discs.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a speaker cover stamping device, comprising: An operating table is provided on which a forming mold is mounted. The forming mold includes a truncated cone-shaped lower mold and an upper mold arranged above the lower mold. The operating table includes a base and a pressing plate. The lower mold is fixedly mounted on the upper surface of the base, and the upper mold is fixedly mounted on the lower surface of the pressing plate. A pull frame is mounted on the lower side of the base. The pull frame supports the pressing plate above the base through a shaft that movably passes through the surface of the base. A hydraulic cylinder for controlling its lifting is provided on the lower side of the pull frame. A plurality of support mechanisms are provided, which are circumferentially assembled around the periphery of the lower die and are used to horizontally support the annular disc. The support mechanism includes a guide rod, which is parallel to the inclined surface of the lower die along the length direction. The upper end of the guide rod is provided with a support assembly for supporting the annular disc, and the lower end is movably connected to the pull frame through a driving assembly; Multiple support assemblies support the annular disc horizontally, and the descending puller drives the correspondingly connected multiple guide rods to descend synchronously through multiple driving assemblies, so that the multiple support assemblies are synchronously lowered in height along the inclined surface of the lower mold, and finally the annular disc is controlled to maintain a horizontal state when descending. The inner circle of the horizontally descending annular disc cooperates with the inclined surface of the lower mold, so that the annular disc is horizontally sleeved on the surface of the lower mold.

[0006] As a further description of the above technical solution: the driving assembly includes a guide rail frame horizontally mounted on the lower end of the guide rod, and a support plate 1 fixedly mounted on one side of the pull frame, the upper surface of the support plate 1 is fixedly mounted with a column, the column moves in a guide groove on the surface of the guide rail frame, and the surface of the column is equipped with a pair of guide wheels, and the pair of guide wheels are in rolling contact with the upper and lower surfaces of the guide rail frame respectively.

[0007] As a further description of the above technical solution: an adjustment unit is provided on one side of the guide rod for controlling the vibration of the support assembly; When the support assembly vibrates under the drive of the adjustment unit, the horizontally supported annular disc can vibrate, and when the annular disc contacts the inclined surface of the lower mold, the flexibility of the inner circle movement is enhanced when the inclined surface of the lower mold pushes one side of the inner circle of the annular disc.

[0008] As a further description of the above technical solution: the support platform assembly includes a lifting plate, and a spring piece is integrally provided in the middle of the lifting plate, and the spring piece is in a "Z" shape; An assembly plate is provided at the upper end of the guide rod, and the lifting plate is fixedly assembled on the upper surface of the assembly plate.

[0009] As a further description of the above technical solution: an open groove is provided on the surface of the guide rod; The adjustment unit includes a vibration rod, both ends of which are elastically assembled on the inner side of the open slot through springs. A support plate 2 for movably assembling the vibration rod is fixedly provided on the inner wall of the open slot, and one end of the spring is against one side of the support plate 2.

[0010] As a further description of the above technical solution: a contact is fixedly connected to the upper end of the vibration rod, the contact contacts the lower end of the spring, and a toggle portion is provided on the side of the vibration rod.

[0011] As a further description of the above technical solution: the adjustment unit also includes a vibration mechanism fixedly mounted on the lower surface of the pedestal, the vibration mechanism includes a speed change gear box fixedly mounted on the lower surface of the pedestal, the output end of the speed change gear box is connected to a dial, and the dial is in rotational contact with the dial part.

[0012] As a further description of the above technical solution: the driving end of the speed change gear box is connected to a winch drum through a flywheel, a pull rope is provided on the surface of the winch drum, one end of the pull rope is fixedly connected to the surface of the pull frame, and a coil spring is also provided on one side of the winch drum, one end of the coil spring is fixedly connected to the surface of the speed change gear box.

[0013] As a further description of the above technical solution: the upper end of the assembly plate is also fixedly connected to a support block, and the support block is arranged below the spring piece and is used to support the outer end of the spring piece.

[0014] To sum up, due to the adoption of the above-mentioned technical scheme, the beneficial effects of the present invention are as follows: the support platform assembly and the guide rod in the support mechanism are flexibly adjusted according to the size of the annular disc, ensuring that annular discs of different models can maintain a horizontal state before stamping, and are accurately mounted on the lower die, which effectively avoids stamping defects caused by the tilt of the annular disc and improves the consistency of product quality. Secondly, the adjustment unit, through the cooperation of the vibration rod and the spring, causes the annular disc to vibrate during the stamping process, thereby enhancing the flexibility of the movement of the annular disc when it contacts the inclined surface of the lower die, further ensuring that annular discs of different models can maintain a horizontal state before stamping, and ensuring the smoothness of the stamping process and the molding quality of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the operating table and its lower side structure of the present invention; Figure 3 It is a schematic diagram of the overall front view structure of the present invention; Figure 4 It is a schematic structural diagram of the support mechanism of the present invention; Figure 5 This is a schematic diagram of the driving component structure of the present invention; Figure 6 It is a schematic structural diagram of the upper end of the guide rod of the present invention; Figure 7 It is a schematic structural diagram of the lower end of the guide rod of the present invention; Figure 8 Schematic diagram of the cross-sectional structure of the guide rod of the present invention; Figure 9 It is a schematic diagram of the disassembled structure of the vibration mechanism of the present invention.

[0016] In the figure: 10, operating table; 11, base; 12, pressure plate; 13, hydraulic cylinder; 14, pulling frame; 20, forming mold; 21, lower mold; 22, upper mold; 30, supporting mechanism; 31, guide rod; 311, guide seat; 312, opening slot; 313, assembly plate; 32, support platform assembly; 321, lifting plate; 322, supporting block; 323, spring; 33, driving assembly; 331, guide rail frame; 332, support plate 1; 333, column; 334, guide wheel; 34, vibration mechanism; 341, speed change gear box; 342, toggle plate; 343, flywheel; 344, winding drum; 345, pull rope; 346, coil spring; 35, vibration rod; 351, toggle part; 352, spring; 353, support plate 2; 354, contact. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0019] Combine Figures 1-9 , a speaker cover stamping device, comprising: The operating table 10 is equipped with a forming mold 20. The forming mold 20 includes a lower mold 21 in the shape of a truncated cone, and an upper mold 22 arranged above the lower mold 21. The lower surface of the upper mold 22 is provided with a stamping groove adapted to the lower mold 21. The operating table 10 includes a base 11 and a pressing plate 12. The lower mold 21 is fixedly assembled on the upper surface of the base 11, and the upper mold 22 is fixedly assembled on the lower surface of the pressing plate 12. A pull frame 14 is assembled on the lower side of the base 11. The pull frame 14 supports the pressing plate 12 above the base 11 through a shaft that is movable through the surface of the base 11. A hydraulic cylinder 13 for controlling its lifting is provided on the lower side of the pull frame 14. When the pull frame 14 is lifted or lowered by the hydraulic cylinder 13, the pressing plate 12 can be driven to lift or lower, and the upper mold 22 can be further controlled to punch onto the upper side of the lower mold 21, so that the annular disc sleeved on the surface of the lower mold 21 is punched into a trumpet-shaped circular cover. In order to cope with different types of annular discs, they are all in a horizontal state when placed on the lower die 21 to ensure that the punched trumpet-shaped dome meets the design requirements.

[0020] Combine Figure 1-Figure 5, a plurality of support mechanisms 30 for horizontally lifting the annular disc are arranged around the periphery of the lower mold 21. The support mechanism 30 includes a guide rod 31. The guide rod 31 is parallel to the inclined surface of the lower mold 21 along the length direction. The guide rod 31 is movably assembled on the base 11 through a guide seat 311. Under the guidance of the guide seat 311, the guide rod 31 is prompted to move along its length direction. The upper end of the guide rod 31 is provided with a support assembly 32 for supporting the annular disc, and the lower end is connected to the pull frame 14 through a driving assembly 33; The driving assembly 33 includes a guide rail frame 331 horizontally mounted on the lower end of the guide rod 31, and a support plate 332 fixedly mounted on one side of the pull frame 14. A column 333 is fixedly mounted on the upper surface of the support plate 332. The column 333 moves in a guide groove on the surface of the guide rail frame 331. A pair of guide wheels 334 are mounted on the surface of the column 333. The pair of guide wheels 334 are in rolling contact with the upper and lower surfaces of the guide rail frame 331 respectively. When the pull frame 14 moves downward, the column 333 will pull the guide rail frame 331 downward through the guide wheel 334, and further, it will also pull the guide rod 31 downward along its length. The guide wheel 334 rolls on the surface of the guide rail frame 331 to adapt to the displacement of the lower end of the guide rod 31 in the horizontal direction.

[0021] Specifically, the annular disc is placed on the upper surface of the support assembly 32, so that the multiple support assemblies 32 support the annular disc horizontally. Subsequently, the pull frame 14 is controlled to descend, and the pull frame 14 will drive the corresponding multiple connected guide rods 31 to descend synchronously through the multiple driving assemblies 33, so that the multiple support assemblies 32 are synchronously lowered in height along the inclined surface of the lower mold 21. Finally, the annular disc supported by the multiple support assemblies 32 is controlled to maintain a horizontal state and descend. In the process of the annular disc maintaining a horizontal state and descending, the inner circle of the annular disc will contact the inclined surface of the lower mold 21. When the two are in contact, the lower mold 21 will push the inner circle of the annular disc until the inner circle of the annular disc is completely covered on the inclined surface of the lower mold 21. In this way, for different models of annular discs, it can be ensured that the annular disc is horizontally covered on the surface of the lower mold 21.

[0022] Combine Figure 4-Figure 9 , an adjustment unit is provided on one side of the guide rod 31 for controlling the vibration of the support assembly 32; When the support assembly 32 vibrates under the drive of the adjustment unit, the horizontally supported annular disc can vibrate. When the annular disc is in contact with the inclined surface of the lower mold 21, the flexibility of the movement of the annular disc is enhanced when the inclined surface of the lower mold 21 pushes one side of the inner circle of the annular disc.

[0023] Specifically, the support platform assembly 32 includes a lifting plate 321, and a spring piece 323 is integrally provided in the middle of the lifting plate 321. The spring piece 323 is "Z"-shaped, and its upper surface can be adaptively extended in the direction away from the lower mold 21 to ensure that it can support annular discs of different diameters. An assembly plate 313 is provided at the upper end of the guide rod 31 , and the lifting plate 321 is fixedly assembled on the upper surface of the assembly plate 313 .

[0024] An opening groove 312 is formed on the surface of the guide rod 31; The adjustment unit includes a vibration rod 35, both ends of which are elastically assembled on the inner side of the opening groove 312 by a spring 352. A support plate 2 353 for movably assembling the vibration rod 35 is fixedly provided on the inner wall of the opening groove 312. One end of the spring 352 is against one side of the support plate 2 353. The vibration rod 35 elastically supported by the spring 352 can reciprocate along the length direction of the guide rod 31.

[0025] Combine Figure 6-Figure 8 The upper end of the vibration rod 35 is fixedly connected to a contact 354 , which contacts the lower end of the spring 323 . A toggle portion 351 is provided on the side of the vibration rod 35 , and the toggle portion 351 includes a plurality of protrusions protruding from the side of the guide rod 31 .

[0026] The adjustment unit also includes a vibration mechanism 34 fixedly mounted on the lower surface of the base 11. The vibration mechanism 34 includes a speed change gear box 341 fixedly mounted on the lower surface of the base 11. The output end of the speed change gear box 341 is connected to a dial 342. The dial 342 has a plurality of protrusions arranged circumferentially on its surface. The dial 342 is in rotational contact with a dial portion 351. Specifically, the speed change gear box 341 drives the toggle plate 342 to rotate at high speed. When the protrusion on the surface of the toggle plate 342 contacts the toggle part 351, the vibration rod 35 is pushed downward, and then the vibration rod 35 is reset under the push of the spring 352. In this way, the toggle part 351 will perform high-frequency reciprocating movement. Further, the contact 354 fixedly connected to the upper end of the vibration rod 35 will hit the lower side of the spring 323, causing the spring 323 to vibrate slightly. In this way, when the annular disc is placed on the upper side of the spring 323, it will also be vibrated. Further, when the annular disc continues to be in a vibrated state and contacts with the inclined surface of the lower mold 21, when the inclined surface of the lower mold 21 pushes the inner circle side of the annular disc, the flexibility of the movement of the annular disc can be enhanced, and it can further ensure that the annular disc is horizontally sleeved on the surface of the lower mold 21.

[0027] Combine Figure 9 The driving end of the speed change gear box 341 is connected to the winch drum 344 through the flywheel 343. A pull rope 345 is provided on the surface of the winch drum 344. One end of the pull rope 345 is fixedly connected to the surface of the pull frame 14. A coil spring 346 is also provided on one side of the winch drum 344. One end of the coil spring 346 is fixedly connected to the surface of the speed change gear box 341. A support block 322 is further fixedly connected to the upper end of the assembly plate 313 . The support block 322 is disposed below the spring piece 323 to support the outer end of the spring piece 323 .

[0028] Specifically, the descending pulling frame 14 rotates the winch drum 344 through the pull rope 345, which can drive the speed change gear box 341. Since the pulling frame 14 descends slowly in actual operation, the speed of driving the winch drum 344 is also limited. Therefore, the speed change gear box 341 needs to change speed to increase the speed of the toggle plate 342. The winding spring 346 stores energy when the pull rope 345 pulls the winch drum 344 to rotate. When the pulling frame 14 rises, it can drive the winch drum 344 to reset, so that the pull rope 345 is rewound on the surface of the winch drum 344. Regarding the setting of the support block 322, combined with Figure 8 When the pull rack 14 moves upward, the horn cover formed on the surface of the lower mold 21 can be pushed out of the surface of the lower mold 21 by the spring 323, completing the unloading. The support block 322 is the same as the upward support force of the outer end of the lifting spring 323, ensuring that the horn cover can be smoothly ejected from the surface of the lower mold 21.

[0029] The setting of the winch drum 344 has the following function: the speed change gear box 341 is driven only when the pulling frame 14 pulls the winch drum 344 to rotate via the pull rope 345. During this process, the guide rod 31 is in the descending stage. The driven speed change gear box 341 causes the toggle plate 342 to rotate, prompting the reciprocating vibration rod 35 to strike the spring piece 323 via the contact 354, so that the annular disc in the descending state can be vibrated. When the pull frame 14 is in the ascending state, the coil spring 346 controls the winch drum 344 to reset and rotate. The winch drum 344 in this rotating state does not drive the speed change gear box 341, causing the dial plate 342 to not rotate, and the vibration rod 35 will also remain stationary. At this time, the spring piece 323 will not vibrate, which ensures the stability of the spring piece 323 when the speaker cover is pushed out from the surface of the lower mold 21.

[0030] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A speaker cover stamping device, characterized in that: include: An operating table is provided on which a forming mold is mounted. The forming mold includes a truncated cone-shaped lower mold and an upper mold arranged above the lower mold. The operating table includes a base and a pressing plate. The lower mold is fixedly mounted on the upper surface of the base, and the upper mold is fixedly mounted on the lower surface of the pressing plate. A pull frame is mounted on the lower side of the base. The pull frame supports the pressing plate above the base through a shaft that movably passes through the surface of the base. A hydraulic cylinder for controlling its lifting is provided on the lower side of the pull frame. A plurality of support mechanisms are provided, which are circumferentially assembled around the periphery of the lower die and are used to horizontally support the annular disc. The support mechanism includes a guide rod, which is parallel to the inclined surface of the lower die along the length direction. The upper end of the guide rod is provided with a support assembly for supporting the annular disc, and the lower end is movably connected to the pull frame through a driving assembly; Multiple support assemblies support the annular disc horizontally, and the descending pull frame drives the corresponding multiple guide rods to descend synchronously through multiple driving assemblies, so that the multiple support assemblies are synchronously lowered along the inclined surface of the lower mold, and finally the annular disc is controlled to maintain a horizontal state when descending. The inner circle of the horizontally descending annular disc cooperates with the inclined surface of the lower mold, so that the annular disc is horizontally sleeved on the surface of the lower mold; An adjustment unit is provided on one side of the guide rod for controlling the vibration of the support assembly; When the support assembly vibrates under the drive of the adjustment unit, the horizontally supported annular disc can vibrate, and when the annular disc contacts the inclined surface of the lower mold, the flexibility of the inner circle movement is enhanced when the inclined surface of the lower mold pushes one side of the inner circle of the annular disc.

2. A speaker cover stamping device according to claim 1, characterized in that: The driving assembly includes a guide rail frame horizontally mounted on the lower end of the guide rod, and a support plate 1 fixedly mounted on one side of the pull frame. A column is fixedly mounted on the upper surface of the support plate 1. The column moves in a guide groove on the surface of the guide rail frame. A pair of guide wheels are mounted on the surface of the column, and the pair of guide wheels are in rolling contact with the upper and lower surfaces of the guide rail frame respectively.

3. The speaker cover punching device according to claim 2, characterized in that: The support platform assembly includes a lifting plate, and a spring piece is integrally provided in the middle of the lifting plate, and the spring piece is in a "Z" shape; An assembly plate is provided at the upper end of the guide rod, and the lifting plate is fixedly assembled on the upper surface of the assembly plate.

4. A speaker cover stamping device according to claim 3, characterized in that: The guide rod surface is provided with an open groove; The adjustment unit includes a vibration rod, both ends of which are elastically assembled on the inner side of the open slot through springs. A support plate 2 for movably assembling the vibration rod is fixedly provided on the inner wall of the open slot, and one end of the spring is against one side of the support plate 2.

5. The speaker cover punching device according to claim 4, characterized in that: The upper end of the vibration rod is fixedly connected with a contact, the contact abuts against the lower end of the spring, and a toggle portion is provided on the side of the vibration rod.

6. The speaker cover punching device according to claim 5, characterized in that: The adjustment unit also includes a vibration mechanism fixedly mounted on the lower surface of the pedestal. The vibration mechanism includes a speed change gear box fixedly mounted on the lower surface of the pedestal. The output end of the speed change gear box is connected to a dial plate, and the dial plate is in rotational contact with the dial portion.

7. The speaker cover punching device according to claim 6, characterized in that: The driving end of the speed change gear box is connected to a winch drum through a flywheel. A pull rope is provided on the surface of the winch drum, one end of which is fixedly connected to the surface of the pull frame. A coil spring is also provided on one side of the winch drum, one end of which is fixedly connected to the surface of the speed change gear box.

8. The speaker cover punching device according to claim 3, characterized in that: The upper end of the assembly plate is also fixedly connected with a support block, which is arranged below the spring piece and is used to support the outer end of the spring piece.

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