A bending tool for bass speaker covers

Abstract

The utility model discloses a kind of bending tool for bass speaker cover, including workbench, the upper side middle part of the workbench is provided with bottom plate, the upper side of the bottom plate is provided with workpiece placing plate, the upper portion of the workpiece placing plate is provided with forming groove, the outer periphery of workpiece placing plate is provided with a plurality of first pressure mechanism and pre-bending mechanism;Clamp, it is set in the just above of the workbench, the bottom of clamp is provided with second pressure mechanism and fine bending mechanism, second pressure mechanism and fine bending mechanism are vertically arranged along the inside edge of forming groove place.This utility model can solve the existing bass speaker cover bending processing rely on manual handheld tool operation, production efficiency is low, and part adopts equipment processing scheme, and again because of lacking pre-bending buffer design, directly through disposable bending to realize target angle, leading to workpiece bending place instantaneous stress concentration, workpiece produces micro crack, low pass rate, seriously restrict production benefit and product quality problem.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing technology, specifically a bending fixture for a bass speaker cover. Background Technology

[0002] As a key component protecting the internal components of a speaker and optimizing acoustic performance, the speaker enclosure's structural precision directly affects the speaker's assembly effect and sound quality. In speaker enclosure production, the bending process requires folding the edges or specific areas of the sheet metal, ensuring the bends are free of cracks and significant deformation to guarantee the sealing and structural stability of subsequent assembly. Current bending methods mostly rely on manual labor, which is labor-intensive and prone to uneven force control leading to bending angle deviations, resulting in low pass rates and low production efficiency. When using simple bending equipment, the lack of pre-bending functionality can cause stress concentration and micro-cracks in the workpiece during one-time bending. Furthermore, the clamping mechanisms of existing equipment are mostly fixed in one direction, making the workpiece prone to horizontal movement or vertical displacement during bending. To address this issue, a new bending fixture for woofer enclosures needs to be designed to meet current usage requirements. Utility Model Content

[0003] This utility model provides a bending fixture for a bass speaker cover, which can solve the problems of low production efficiency caused by the reliance on manual hand tools in the existing bass speaker cover bending process, while the partial use of equipment processing lacks pre-bending buffer design and directly achieves the target angle through one-time bending, resulting in instantaneous stress concentration at the bending point of the workpiece, micro-cracks in the workpiece, low pass rate, and serious restriction on production efficiency and product quality.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a bending fixture for a bass speaker cover, comprising a worktable, a base plate disposed at the upper center of the worktable, a workpiece placement plate disposed on the upper side of the base plate, a forming groove disposed on the upper part of the workpiece placement plate, and a plurality of first pressing mechanisms and pre-bending mechanisms disposed on the outer periphery of the workpiece placement plate; a pressure plate, which can be raised and lowered and disposed directly above the worktable, and a second pressing mechanism and a fine bending mechanism disposed at the bottom of the pressure plate, the second pressing mechanism and the fine bending mechanism being vertically arranged along the inner edge of the forming groove; and a fixing plate. The platen is horizontally positioned above the pressure plate. A drive device for raising and lowering the pressure plate is mounted on the fixed plate. The movable end of the drive device is connected to the pressure plate. Through the synchronous operation of three sets of first pressing mechanisms, the sheet metal to be bent is fixed on the workpiece placement plate. Seven sets of pre-bending mechanisms operate according to a preset program, pre-pressing each part of the sheet metal to be bent to 45°. Finally, the pressure plate presses down, the second pressing mechanism elastically presses the sheet metal, and the fine bending mechanism finally bends the sheet metal into a bass speaker cover. Through the coordinated control of the pre-bending mechanism and the fine bending mechanism, stress concentration in the workpiece is reduced, greatly improving production efficiency and pass rate.

[0005] As a supplement to the technical solution described in this utility model, the precision bending mechanism includes a fixed block vertically arranged on the lower side of the pressure plate, a bending head is provided on one side of the fixed block, and a lead screw is abutted on the top of the bending head. The lead screw is threadedly connected to the pressure plate. Through the precision bending mechanism, the sheet metal of the workpiece is pressed from a 45° bend to the final bending angle.

[0006] As a supplement to the technical solution described in this utility model, the pre-bending mechanism includes a second cylinder disposed on the upper part of the base plate. At least one pre-pressing head is installed on the movable end of the second cylinder. The pre-pressing head corresponds one-to-one with the bending head. An installation block corresponding to the second cylinder is disposed on the outer side of the workpiece placement plate. A first limiting bolt is disposed on the upper end of the installation block. The pre-bending mechanism is responsible for pre-pressing the fixed workpiece sheet metal to a 45° bend, laying the foundation for the final bending and forming. A total of seven sets are provided, which are distributed at different positions according to the bending contour of the bass speaker cover sheet metal.

[0007] As a supplement to the technical solution described in this utility model, the first pressing mechanism includes a first cylinder disposed on the upper part of the base plate and located on one side of the workpiece placement plate. A drive plate extending into the forming groove is disposed on the upper part of the first cylinder. A first pressure head is installed at the first end of the drive plate, and a limit post is installed at the second end of the drive plate. The first pressing mechanism realizes precise fixation of the workpiece and provides stable pressing for subsequent pre-bending.

[0008] As a supplement to the technical solution described in this utility model, the second pressing mechanism includes a connecting column disposed on the lower side of the pressure plate, a connecting rod slidably disposed inside the connecting column, a second pressing head disposed at the bottom of the connecting rod, and a spring sleeved on the connecting rod between the second pressing head and the connecting column. When the pressure plate descends, the second pressing head first contacts the upper surface of the workpiece. As the pressure plate continues to descend, the spring is compressed to generate elastic pressure, which firmly fixes the workpiece in the vertical direction without damaging it, preventing the workpiece from shifting during bending, and providing stable pressing during fine bending.

[0009] As a supplement to the technical solution described in this utility model, guide posts are vertically fixed at the four corners of the upper side of the workbench. The upper ends of the guide posts are connected to the fixed plate. Guide sleeves are fixedly installed at the four corners of the pressure plate. The guide sleeves drive the pressure plate to slide and connect with the guide posts. The guide sleeves and guide posts slide and cooperate to ensure that the pressure plate moves smoothly and ensure that the precision bending mechanism can bend the workpiece.

[0010] As a supplement to the technical solution described in this utility model, the lower ends of the two guide pillars at the front and rear are detachably provided with connecting blocks, and a buffer is vertically provided in the middle of the connecting block. The buffer slows down the descent speed of the pressure plate and prevents the bending head and the workpiece from being deformed or damaged due to excessive impact.

[0011] As a supplement to the technical solution described in this utility model, a sensor is provided on one side of the workpiece placement plate to detect whether a sheet metal workpiece to be bent is placed there.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By coordinating the pre-bending mechanism and the fine bending mechanism, stress concentration in the workpiece is reduced, greatly improving production efficiency and yield. Multiple bending heads of the fine bending mechanism can be finely adjusted via lead screws. This solves the problem that existing bass speaker cover bending processes rely on manual hand tools, resulting in low production efficiency. In contrast, some machine-based processing solutions lack pre-bending buffer design and directly achieve the target angle through a single bend, leading to instantaneous stress concentration at the workpiece bending point, causing micro-cracks and low yield, which seriously restricts production efficiency and product quality. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the base plate of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the pressure plate of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the first pressing mechanism of this utility model;

[0018] Figure 5 This is a schematic diagram of the pre-bending mechanism of this utility model;

[0019] Figure 6 This is a schematic diagram of the structure of the second pressing mechanism of this utility model;

[0020] Figure 7 This is a schematic diagram of the bending mechanism of this utility model. Figure 1 ;

[0021] Figure 8 This is a schematic diagram of the bending mechanism of this utility model. Figure 2 .

[0022] Figure label:

[0023] 1. Workbench; 2. Base plate; 3. Workpiece placement plate; 31. Forming groove; 4. First clamping mechanism; 41. First cylinder; 42. Drive plate; 43. First pressure head; 44. Limiting post; 5. Pre-bending mechanism; 51. Second cylinder; 52. Pre-pressure head; 53. Mounting block; 54. First limiting bolt; 6. Pressure plate; 7. Second clamping mechanism; 71. Connecting post; 72. Connecting rod; 73. Second pressure head; 74. Spring; 8. Fine bending mechanism; 81. Fixing block; 82. Bending head; 83. Lead screw; 9. Fixing plate; 10. Drive device; 11. Guide post; 12. Guide sleeve; 13. Connecting block; 14. Buffer; 15. Sensor. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] The present invention relates to a bending fixture for a bass speaker cover, such as... Figure 1-8As shown, the system includes a workbench 1, a base plate 2 located at the upper center of the workbench 1, a workpiece placement plate 3 located on the upper side of the base plate 2, a forming groove 31 located on the upper part of the workpiece placement plate 3, and multiple first pressing mechanisms 4 and pre-bending mechanisms 5 located on the outer periphery of the workpiece placement plate 3; a pressure plate 6, which can be raised and lowered and is located directly above the workbench 1, and a second pressing mechanism 7 and a fine bending mechanism 8 located at the bottom of the pressure plate 6, the second pressing mechanism 7 and the fine bending mechanism 8 being vertically arranged along the inner edge of the forming groove 31; and a fixing plate 9, which is horizontally located above the pressure plate 6. The fixed plate 9 is equipped with a driving device 10 that drives the pressure plate 6 to rise and fall. The movable end of the driving device 10 is connected to the pressure plate 6. Through the synchronous action of three sets of first pressing mechanisms 4, the sheet metal to be bent is fixed on the workpiece placement plate 3. Seven sets of pre-bending mechanisms 5 act according to a preset program to pre-press each part of the sheet metal to be bent to 45°. Finally, the pressure plate 6 presses down, the second pressing mechanism 7 elastically presses the sheet metal, and the fine bending mechanism 8 finally bends the sheet metal into a bass speaker cover. Through the coordinated control of the pre-bending mechanism and the fine bending mechanism, the stress concentration of the workpiece is reduced, which greatly improves the production efficiency and pass rate.

[0026] In this embodiment, as Figure 5 As shown, the pre-bending mechanism 5 includes a second cylinder 51 disposed on the upper part of the base plate 2. At least one pre-pressing head 52 is installed on the movable end of the second cylinder 51. The pre-pressing head 52 corresponds one-to-one with the bending head 82. The outer side of the workpiece placement plate 3 is provided with a mounting block 53 corresponding to the second cylinder 51. The upper end of the mounting block 53 is provided with a first limiting bolt 54. The mounting block 53 is made of urethane rubber, which will not scratch the product surface. The pre-bending mechanism 5 is responsible for pre-pressing the fixed workpiece sheet metal to a 45° bend, laying the foundation for the final bending and forming. A total of seven sets are set, which are distributed in different positions according to the bending contour of the bass speaker cover sheet metal.

[0027] In this embodiment, as Figure 7 As shown, the precision bending mechanism 8 includes a fixing block 81 vertically arranged on the lower side of the pressure plate 6. The fixing block 81 is provided with a mounting groove. The bending head 82 is installed in the mounting groove by bolts and its position can be finely adjusted along the groove wall. The bottom of the bending head 82 is provided with an arc-shaped protrusion. The arc of the arc-shaped protrusion is adapted to the bending radius of the bass speaker cover. The top of the bending head 82 abuts against a lead screw 83. The lead screw 83 is threadedly connected to the pressure plate 6. When the bending head 82 is pressed down, the lead screw 83 abuts against the bending head 82 to prevent it from loosening, thereby locking the position of the bending head 82. The precision bending mechanism 8 presses the sheet metal of the workpiece from a 45° bend to the final bending angle.

[0028] In this embodiment, as Figure 4As shown, the first pressing mechanism 4 includes a first cylinder 41 disposed on the upper part of the base plate 2 and located on one side of the workpiece placement plate 3. A drive plate 42 extending into the forming groove 31 is disposed on the upper part of the first cylinder 41. A first pressure head 43 is installed at the first end of the drive plate 42, and a limit post 44 is installed at the second end of the drive plate 42. The first pressing mechanism 4 realizes precise fixation of the workpiece and provides stable pressing for subsequent pre-bending.

[0029] In this embodiment, as Figure 6 As shown, the second pressing mechanism 7 includes a connecting column 71 disposed on the lower side of the pressure plate 6. A connecting rod 72 is slidably disposed inside the connecting column 71. A second pressing head 73 is disposed at the bottom of the connecting rod 72. A spring 74 is sleeved on the connecting rod 72 between the second pressing head 73 and the connecting column 71. The second pressing head 73 is made of urethane rubber, which will not scratch the surface of the product. When the pressure plate 6 descends, the second pressing head 73 first contacts the upper surface of the workpiece. As the pressure plate 6 continues to descend, the spring 74 is compressed to generate elastic pressure, which firmly fixes the workpiece in the vertical direction without damaging the workpiece, preventing the workpiece from shifting when bending, and providing stable pressing during the fine bending process.

[0030] In this embodiment, as Figure 1 As shown, guide posts 11 are vertically fixed at the four corners of the upper side of the workbench 1. The upper end of the guide post 11 is connected to the fixed plate 9. Guide sleeves 12 are fixed at the four corners of the pressure plate 6. The guide sleeves 12 drive the pressure plate 6 to slide and connect with the guide post 11. The guide sleeves 12 and the guide post 11 slide and cooperate to ensure that the pressure plate 6 moves smoothly and ensures that the precision bending mechanism 8 can bend the workpiece.

[0031] In this embodiment, as Figure 1 As shown, the lower ends of the two guide posts 11 at the front and rear are detachably provided with connecting blocks 13. A buffer 14 is vertically provided in the middle of the connecting block 13. The buffer 14 slows down the descent speed of the pressure plate 6 and prevents the bending head 82 from deforming or being damaged by excessive impact on the workpiece.

[0032] In this embodiment, as Figure 2 As shown, a sensor 15 is provided on one side of the workpiece placement plate 3 to detect whether a sheet metal workpiece to be bent is placed.

[0033] In this embodiment, as Figure 1As shown, the operator places the sheet metal part to be bent on the upper side of the workpiece placement plate 3. After the sensor 15 detects the workpiece, it sends a signal to the equipment control system, allowing the equipment to start the subsequent process. If no workpiece is detected, the equipment is locked to avoid dry running and damage to the parts. Pressing the operation button activates the first cylinders 41 of the three sets of first pressing mechanisms 4, which move synchronously. The first cylinders 41 push the drive plate 42 towards the forming groove 31 until the first pressure head 43 presses the edge of the sheet metal part. At this time, the limit post 44 abuts against the lower end face of the drive plate 42, limiting the excessive movement of the drive plate 42 and ensuring uniform pressing force without damaging the workpiece. The seven sets of pre-bending mechanisms 5 start sequentially or synchronously according to the preset program to adapt to the bending contour of the bass speaker cover. The second cylinder 51 drives the pre-pressing head 52 towards the workpiece placement plate 3, applying pressure to the part of the sheet metal part to be bent and pre-pressing it to 45°. The first limit bolt 54 limits the maximum stroke of the second cylinder 51. The drive device 10 drives the pressure plate 6 to move downward along the guide post 11. During the process, the guide sleeve 12 slides with the guide post 11 to ensure that the pressure plate 6 descends smoothly. First, the second pressure head 73 of the second pressing mechanism 7 contacts the upper surface of the workpiece. As the pressure plate 6 continues to descend, the spring 74 is compressed to generate elastic pressure. The bending head 82 of the precision bending mechanism 8 then contacts the pre-bent workpiece and continues to move towards the forming groove 31, pressing the 45° pre-bent sheet metal to the final bending angle. The lead screw 83 at the top of the bending head 82 can be adjusted in advance to ensure angle accuracy. When the pressure plate 6 descends to near its lowest position, its lower surface abuts against the buffer 14. The buffer 14 slows down the descent speed of the pressure plate 6 through hydraulic or spring damping, preventing the bending head 82 from deforming or cracking due to excessive impact on the workpiece. After the precision bending is completed, the drive device 10 drives the pressure plate 6 to rise and reset. The second pressing mechanism 7, the first pressing mechanism 4, and the pre-bending mechanism 5 are released in sequence. The operator removes the formed bass speaker cover, completing a single processing cycle. The pre-bending mechanism 5 and the precision bending mechanism 8 work together to ensure that each bending part undergoes the two-step process of "pre-bending-precision bending", effectively dispersing bending stress and avoiding micro-cracks caused by one-time bending, greatly improving production efficiency and pass rate.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A bending fixture for a bass speaker enclosure, characterized in that, include: A workbench (1) is provided with a base plate (2) in the middle of the upper side of the workbench (1), a workpiece placement plate (3) is provided on the upper side of the base plate (2), a forming groove (31) is provided on the upper part of the workpiece placement plate (3), and a plurality of first pressing mechanisms (4) and pre-bending mechanisms (5) are provided on the outer periphery of the workpiece placement plate (3). The pressure plate (6) is raised and lowered and is positioned directly above the workbench (1). The bottom of the pressure plate (6) is provided with a second pressing mechanism (7) and a fine bending mechanism (8). The second pressing mechanism (7) and the fine bending mechanism (8) are arranged vertically along the inner edge of the forming groove (31). A fixed plate (9) is horizontally arranged on the upper side of the pressure plate (6). A driving device (10) for driving the pressure plate (6) to rise and fall is provided on the fixed plate (9). The movable end of the driving device (10) is connected to the pressure plate (6).

2. The bending fixture for a bass speaker cover according to claim 1, characterized in that: The precision bending mechanism (8) includes a fixed block (81) vertically arranged on the lower side of the pressure plate (6). A bending head (82) is provided on one side of the fixed block (81). A lead screw (83) is abutted on the top of the bending head (82). The lead screw (83) is threadedly connected to the pressure plate (6).

3. The bending fixture for a bass speaker cover according to claim 2, characterized in that: The pre-bending mechanism (5) includes a second cylinder (51) disposed on the upper part of the base plate (2). At least one pre-pressing head (52) is installed on the movable end of the second cylinder (51). The pre-pressing head (52) corresponds one-to-one with the bending head (82). The workpiece placement plate (3) is provided with a mounting block (53) corresponding to the second cylinder (51) on the outer side. The upper end of the mounting block (53) is provided with a first limiting bolt (54).

4. The bending fixture for a bass speaker cover according to claim 1, characterized in that: The first pressing mechanism (4) includes a first cylinder (41) disposed on the upper part of the base plate (2) on one side of the workpiece placement plate (3). The upper part of the first cylinder (41) is provided with a drive plate (42) extending into the forming groove (31). A first pressure head (43) is installed at the first end of the drive plate (42), and a limit post (44) is installed at the second end of the drive plate (42).

5. The bending fixture for a bass speaker cover according to claim 1, characterized in that: The second pressing mechanism (7) includes a connecting column (71) disposed on the lower side of the pressure plate (6), a connecting rod (72) is slidably disposed inside the connecting column (71), a second pressing head (73) is disposed at the bottom of the connecting rod (72), and a spring (74) is sleeved on the connecting rod (72) between the second pressing head (73) and the connecting column (71).

6. The bending fixture for a bass speaker cover according to claim 1, characterized in that: The workbench (1) has guide posts (11) vertically fixed at the four corners of its upper side. The upper end of the guide post (11) is connected to the fixed plate (9). The pressure plate (6) has guide sleeves (12) fixed at the four corners of its upper side. The guide sleeves (12) drive the pressure plate (6) to slide and connect with the guide post (11).

7. The bending fixture for a bass speaker cover according to claim 6, characterized in that: The lower ends of the two guide posts (11) at the front and rear are detachably provided with connecting blocks (13), and a buffer (14) is vertically provided in the middle of the connecting blocks (13).

8. The bending fixture for a bass speaker cover according to claim 1, characterized in that: A sensor (15) is provided on one side of the workpiece placement plate (3).

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