Bending machine for sound box mesh enclosure and machining process

Abstract

The invention belongs to the technical field of sound box mesh enclosure production, and particularly relates to a bending machine for a sound box mesh enclosure and a machining process, the machining process comprises the steps of S1, cutting, S2, polishing, S3, punching and S4, bending, specifically, the sound box mesh enclosure is placed in the bending machine to be bent; the bending machine comprises a machine body, the machine body is provided with a control panel, an upper die and a lower die, the machine body is integrally provided with a mounting platform, and the mounting platform is provided with a feeding unit arranged on one side of the lower die and an overturning unit matched with the feeding unit; compared with the prior art, the mesh enclosure blank feeding device has the advantages that manual feeding of mesh enclosure blanks by operators is avoided, the working safety of the operators is improved, manual operation is not needed, and the yield of products is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of audio grille production, and more specifically, it relates to a bending machine and processing technology for audio grilles. Background Art

[0002] Speakers generally consist of a speaker unit and a cabinet. The speaker unit is the component that emits sound, and the cabinet serves as a supplement to the speaker unit to correct the sound. To protect the speaker unit and prevent dust, a grille is installed on the cabinet.

[0003] For example, a metal stretch mesh production line and process for audio grilles disclosed in the application publication number CN116078862A can perform flattening operations on stretch meshes of different thicknesses, effectively increasing the working range of the device. At the same time, the continuously rotating half gear can drive the reciprocating moving frame to reciprocate under the action of continuous teeth. Subsequently, the reciprocating moving frame can reciprocate and drive the interconnected sliding rod to slide. Further, the fixed bottom plate and the adjustable lower pressing plate reciprocally flatten the stretch mesh, effectively improving the flattening quality of the stretch mesh. In addition, the present invention can perform flattening operations on multiple stretch meshes.

[0004] In the above, although operations can be performed on multiple grilles, the processing of existing audio grilles still requires several steps such as cutting, drilling, and bending. During the bending process of the audio grille, first, the audio grille to be bent is manually placed into the bending machine. First, the power is turned on, the key switch is turned on on the control panel, then the oil pump is started, and then the audio grille is manually placed into the bending machine. The foot pedal switch is pressed to start bending. When the foot is released, the bending machine stops, and when the foot is pressed again, it continues to move downward. During bending, the audio grille needs to be manually fixed, with low efficiency. Moreover, the worker needs to lift the audio grille and apply a certain force to bend it. This process not only requires a high physical strength from the worker but also requires the worker to accurately control the force. Otherwise, the bending angle will deviate, and there are safety hazards during the placement process. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a bending machine and processing technology for audio grilles that do not require manual bending of the audio grille by workers.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A bending machine for audio grilles, the bending machine includes a machine body, on which there is a control panel, an upper die and a lower die. One side of the machine body is integrally provided with an installation platform, and on the installation platform, there is a feeding unit disposed on one side of the lower die and a flipping unit cooperating with the feeding unit. The flipping unit is provided with an infrared sensor and a distance sensor for sensing the conveying distance of the sound mesh cover. The infrared sensor and the distance sensor are both communicatively connected to the control panel.

[0007] The present invention is further configured as follows: The feeding unit includes a driving motor, a mounting frame, two rollers and a conveyor belt. The driving motor is communicatively connected to the control panel. The mounting frame is fixed on the mounting platform. The two rollers are respectively rotatably connected to both sides of the mounting frame. The driving motor is fixed on one side of the mounting frame and its output end is connected to one of the rollers. The conveyor belt is sleeved on the outer peripheral wall of the roller. The end face of the conveyor belt is provided with a number of limit protrusions arranged in a rectangle for positioning the sound mesh cover. The conveyor belt is also provided with two limit members for pushing the sound mesh cover onto the flipping unit.

[0008] The present invention is further configured as follows: The two limit members are respectively sleeved on the surface of the conveyor belt and placed on both sides of the limit protrusions arranged in a rectangle. The limit member includes a connecting belt sleeved on the conveyor belt and a number of push rods placed on the connecting belt. A number of threaded holes penetrating the conveyor belt are equidistantly arranged on the connecting belt. The push rod is provided with an external thread and is fixed in the threaded hole.

[0009] The present invention is further configured as follows: The flipping unit includes a connecting frame fixed on the mounting table, a flipping plate placed on the connecting frame, an adjusting mechanism and a steering mechanism. A clamping groove cooperating with the feeding unit is opened on one side of the connecting frame. One end of the conveyor belt extends into the clamping groove. The adjusting mechanism is hinged to the connecting frame. The adjusting mechanism is placed on one side of the connecting frame and the adjusting mechanism is connected to the flipping plate so that the adjusting mechanism controls the flipping of the flipping plate. A stepped mounting groove is provided on the end face of the connecting frame. The flipping plate is placed in the mounting groove. A stepped placing groove is opened on the end face of the flipping plate. The flipping plate is hinged to the connecting frame.

[0010] The present invention is further configured as follows: The adjusting mechanism includes a hydraulic cylinder, a movable plate and a gear. The hydraulic cylinder is communicatively connected to the control panel. The hydraulic cylinder is placed on the side wall of the connecting frame. The output end of the hydraulic cylinder is connected to the movable plate. One end of the movable plate passes through the machine body. The movable plate includes a rack portion and a sliding portion. Limit plates are provided on both sides of the sliding portion. One end of the gear is provided with a connecting rod. The other end of the connecting rod passes through the connecting frame and is connected to the flipping plate. The connecting rod rotates relative to the connecting frame. The gear meshes with the rack portion. The initial position of the gear is above the rack portion. The other side wall of the flipping plate is hinged to the connecting frame.

[0011] The present invention is further configured as follows: The steering mechanism includes a special-shaped guide plate, an electromagnet and a steering wheel. The electromagnet is electrically connected to the control panel. The electromagnet is disc-shaped and placed in the placement groove. The electromagnet passes through the flipping plate and is fixedly connected to the lower end face of the electromagnet. The side wall of the steering wheel is provided with convex teeth, and the length of the convex teeth is one-half of the circumference of the steering wheel. The steering wheel is also provided with two symmetrically arranged special-shaped teeth, and the special-shaped teeth are placed at both ends of the convex teeth.

[0012] The present invention is further configured as follows: The cross-section of the special-shaped guide plate is Z-shaped. The special-shaped guide plate includes a positioning plate, a connecting plate, and a toothed plate. Both ends of the connecting plate are fixedly connected to the positioning plate and the toothed plate respectively. The positioning plate is placed between the two limiting plates and is slidably connected to the sliding part. The upper end face of the toothed plate is provided with a clamping post and a convex block that cooperate with the convex teeth.

[0013] The processing technology of the speaker grille, and this processing technology includes the following steps: S1: Cutting. Place the plate to be processed in the cutting machine and cut it into a grille blank. S2: Grinding. Place the grille blank in the grinding machine and grind the surface of the grille blank through the grinding machine. S3: Punching. Place the grille blank in the punching machine so that the surface of the grille blank has holes arranged in a rectangular pattern. S4: Bending. Place the punched grille blank in the bending machine and bend both sides of the grille blank through the bending machine. After bending, the grille blank is formed into a speaker grille. S5: Cleaning. Place the processed speaker grille in water for surface cleaning. S6: Galvanizing. Place the cleaned and drained speaker grille in a zinc infiltration furnace for zinc infiltration treatment on the surface of the speaker grille. S7: Spraying. Place the cooled speaker grille after zinc infiltration in the cleaning machine and clean the dust and remaining materials remaining after zinc infiltration on the speaker grille. S8: Drying. Place the cleaned speaker grille in the dryer, and the drying time is 10 minutes to dry the moisture on the surface of the speaker grille. S9: Packing. Place the speaker grille in the packaging machine for packing.

[0014] The present invention is further configured as follows: In the galvanizing step of S6, zinc powder is added to the zinc infiltration furnace, the temperature of the zinc infiltration furnace is set to 390 degrees Celsius, the heating time is set to 35 minutes, and after zinc infiltration is completed, the temperature in the zinc infiltration furnace is cooled to 50 degrees Celsius - 80 degrees Celsius.

[0015] Comparing with the deficiencies of the prior art, the beneficial effects of the present invention are: By arranging a loading unit and a flipping unit on the body of the bending machine, the speaker grille is moved into the processing station through the loading unit, avoiding manual placement by operators, which increases the safety of the operators. The flipping plate drives the transmitted grille blank to flip, and the upper die presses down to complete the adjustment of the angle of the grille blank. The rotating disk drives the flipping plate to rotate, achieving the purpose of processing both sides of the grille blank. During the loading and bending processes of the grille blank, it is all completed by the machine, increasing the qualified rate of the production of the speaker grille. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of an embodiment of the present invention; Figure 2 is a partial schematic diagram of the flipping unit of an embodiment of the present invention; Figure 3 is a partial top view of the flipping unit of an embodiment of the present invention; Figure 4 is a top view of the steering mechanism of an embodiment of the present invention; Figure 5 is a top view of the conveyor belt of the flipping unit; Figure 6 is a side sectional view of an embodiment of the present invention.

[0017] Body 1, control panel 2, upper die 3, lower die 4, installation platform 5, loading unit 6, flipping unit 7, infrared sensor 8, distance sensor 9, conveyor belt 10, limit protrusion 11, connecting belt 12, push rod 13, connecting frame 14, flipping plate 15, electromagnet 16, hydraulic cylinder 17, gear 18, movable plate 19, steering wheel 20, convex tooth 21, special-shaped guide plate 22, limit plate 23, convex block 24, clamping column 25, rack part 26, sliding part 27, positioning plate 28, connecting plate 29, toothed plate 30, drive motor 31, mounting frame 32, roller 33, limiting member 34, threaded hole 35, adjusting mechanism 36, steering mechanism 37, card slot 38, placement groove 39, connecting rod 40, special-shaped tooth 41, mounting groove 42, grille blank 43. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0020] The processing technology of the sound box grille includes the following steps: First, place the sheet material to be processed in a cutting machine and cut it into a grille blank 43. The specifications of the grille blank 43 are usually consistent with the corresponding sound box housing.

[0021] Then, place the grille blank 43 in a grinding machine and polish the surface of the grille blank 43 with a 3000-mesh sandpaper to make the surface of the grille blank 43 smooth.

[0022] Finally, place the grille blank 43 in a punching machine to punch rectangularly arranged holes in the grille blank 43. Subsequently, place the punched grille blank 43 in a bending machine and bend both sides of the grille blank 43 through the bending machine. The bent grille blank 43 is formed into a sound box grille, which is convenient for the sound box grille to buckle on both sides of the housing.

[0023] During the processing of the sound box grille, the bending machine involved in the present invention is used to bend the grille blank 43. The specific working process is as follows: First, the connecting belt 12 needs to be sleeved on the conveyor belt 10, and then the push rod 13 is passed through the connecting belt 12 and screwed to the conveyor belt 10, and the positions of the connecting belt 12 and the push rod 13 can be adjusted according to the size of the grille blank 43 to be processed.

[0024] Then, place the grille blank 43 on the conveyor belt, set the initial position of the hydraulic cylinder 17, and then engage the holes in the grille blank 43 with the corresponding limit protrusions 11. At this time, one end of the positioning plate 28 is attached to the limiting plate 23 close to the hydraulic cylinder 17.

[0025] When the grille blank 43 is conveyed onto the turning plate 15, at this time, a part of the grille blank 43 is on the turning plate 15 and the other part is on the conveyor belt 10. During the continuous operation of the conveyor belt 10, during the conveyance of the grille blank 43, the conveyor belt 10 is always moving. During the movement of the conveyor belt 10, the limit protrusions 11 will also move until they move out of the holes, and the push rod 13 completely pushes the grille blank 43 onto the turning plate 15.

[0026] At this time, one side of the mesh cover blank 43 that needs to be processed is placed between the upper mold 3 and the lower mold 4, and a part of it is placed on the flip plate 15. The distance sensor 9 and the infrared sensor 8 sense that the mesh cover blank 43 has completely entered the processing station. At this time, the mesh cover blank 43 is placed on the flip plate 15, and the mesh cover blank 43 is fixed and limited by the flip plate 15. Then the upper mold 3 is pressed down. At the same time, the hydraulic cylinder 17 pulls to make the rack part 26 drive the gear 18 to rotate, and the gear 18 drives the flip plate 15 to rotate, so that the flip plate 15 drives the mesh cover blank 43 to adjust the angle.

[0027] After the pressing is completed, the electromagnet 16 is energized to adsorb and fix the mesh cover blank 43 placed on the turning plate 15 .

[0028] After one side of the mesh blank 43 is bent, the hydraulic cylinder 17 is reset, driving the flip plate 15 to reset. At this time, the hydraulic cylinder 17 continues to push until the limit plate 23 pushes the special-shaped guide plate 22 to move. During the movement of the special-shaped guide plate 22, the tooth plate 30 will drive the steering wheel 20 to rotate. Since the electromagnet 16 is in a working state at this time, the mesh blank 43 can be adsorbed, thereby driving the mesh blank 43 to rotate together until the other side of the mesh blank 43 is rotated into the processing station.

[0029] Subsequently, the electromagnet 16 is powered off, the hydraulic cylinder 17 is pulled back, and the above operation is repeated to bend the other side of the mesh cover blank 43 .

[0030] like Figure 1 As shown, The body 1 of the bending machine is provided with a control panel 2, an upper die 3 and a lower die 4. A mounting platform 5 is integrally installed on one side of the body 1. A loading unit 6 placed on one side of the lower die 4 and a flip unit 7 cooperating with the loading unit 6 are installed on the mounting platform 5. The upper die 3 and the lower die 4 are provided by the body 1, and the upper die 3 can move up and down for stamping.

[0031] The control panel 2 includes a central processing module, a sensing module, a signal receiving module and a signal output module, which are communicatively connected. The sensing module is associated with the infrared sensor 8 and the distance sensor 9, the signal receiving module is associated with the sensing module, and the signal output module is associated with the hydraulic cylinder 17, the drive motor 31 and the electromagnet 16.

[0032] The sensing module senses the information brought by the infrared sensor 8 and the distance sensor 9, the signal receiving module receives these signals and transmits them to the central processing module, and the central processing module outputs corresponding instructions to the signal output module.

[0033] An infrared sensor 8 and a distance sensor 9 for sensing the transmission distance of the mesh cover blank 43 are installed on the flipping unit 7. The infrared sensor 8 is in telecommunication connection with the control panel 2. The sensing module is associated with the infrared sensor 8 and the distance sensor 9, and the sensed information is input into the central processing module. The signal output module outputs signals to the corresponding components.

[0034] The feeding unit 6 includes a driving motor 31, a mounting frame 32, two rollers 33 and a conveyor belt 10. The driving motor 31 is communicatively connected to the control panel 2.

[0035] The mounting frame 32 is fixed on the mounting platform 5. The two rollers 33 are respectively rotatably connected to both sides of the mounting frame 32. The driving motor 31 is fixed on one side of the mounting frame 32 and its output end is connected to one of the rollers 33. The conveyor belt 10 is sleeved on the outer peripheral wall of the roller 33. A number of limiting protrusions 11 for positioning the mesh cover blank 43 are arranged in a rectangular pattern on the end face of the conveyor belt 10. When the driving motor 31 works, it drives the roller 33 to rotate, and the rotation of the roller 33 drives the conveyor belt 10 to move, thereby driving the mesh cover blank 43 placed on the conveyor belt 10 to be transported.

[0036] Since the position of the mesh cover needs to be kept stable during the stamping of the mesh cover blank 43, it is necessary to limit the mesh cover blank 43 during the transmission process. The mesh cover blank 43 is limited by the limiting protrusions 11, which is simple and easy to operate.

[0037] As Figure 1 and Figure 5 shown, there is a clamping groove 38 on one side of the connecting frame 14 that cooperates with the feeding unit 6. One end of the conveyor belt 10 extends into the clamping groove 38, which is convenient for the feeding unit 6 to transport the mesh cover blank 43 onto the flipping unit 7.

[0038] The flipping unit 7 includes a connecting frame 14, a flipping plate 15 placed on the connecting frame 14, an adjusting mechanism 36 and a steering mechanism 37. The infrared sensor 8 and the distance sensor 9 are both placed on the end face of the flipping plate 15. The infrared sensor 8 is placed at one end of the flipping plate 15 close to the conveyor belt 10, and the distance sensor 9 is placed at one end of the flipping plate close to the hydraulic cylinder 17.

[0039] They are respectively placed at two corners of the flipping plate 15, which is convenient for sensing the position of the mesh cover blank 43.

[0040] The connecting frame 14 is fixed on the mounting platform 5. The adjusting mechanism 36 is placed on one side of the connecting frame 14 and the adjusting mechanism 36 is connected to the flipping plate 15. A stepped mounting groove 42 is provided on the end face of the connecting frame 14. The flipping plate 15 is placed in the mounting groove 42, and a stepped placement groove 39 is provided on the end face of the flipping plate 15.

[0041] The adjusting mechanism 36 includes a hydraulic cylinder 17, a movable plate 19 and a gear 18. The hydraulic cylinder 17 is communicatively connected to the control panel 2. The signal output module outputs a signal to the hydraulic cylinder 17 to adjust the working state of the hydraulic cylinder 17.

[0042] The hydraulic cylinder 17 is placed on the side wall of the connecting frame 14. The output end of the hydraulic cylinder 17 is connected to the movable plate 19. One end of the movable plate 19 passes through the body 1. Since the movable plate 19 will reciprocate in the body 1 during operation, there is a need for a space in the body 1 to allow the displacement of the movable plate 19.

[0043] The movable plate 19 includes a rack portion 26 and a sliding portion 27. Limiting plates 23 are installed on both sides of the sliding portion 27. One end of the gear 18 is installed with a connecting rod 40. The other end of the connecting rod 40 passes through the connecting frame 14 and is connected to the turning plate 15. The connecting rod 40 is hingedly connected to the connecting frame 14. The gear 18 meshes with the rack portion 26. The initial position of the gear 18 is placed below the rack portion 26. The other side wall of the turning plate 15 is hingedly connected to the connecting frame 14.

[0044] By pulling the movable plate 19 to move with the hydraulic cylinder 17, during the movement of the movable plate 19, the rack portion 26 drives the gear 18 to rotate. During the rotation of the gear 18, the connecting rod 40 and the turning plate 15 are driven to turn, thereby adjusting the angle of the mesh cover blank 43 placed on the turning plate 15.

[0045] The steering mechanism 37 includes a special-shaped guide plate 22, an electromagnet 16 and a steering wheel 20. The electromagnet 16 is communicatively connected to the control panel 2. The working state of the electromagnet 16 is controlled by the signal output module.

[0046] The electromagnet 16 is in a disc shape. The electromagnet 16 is placed in the placement groove 39. The electromagnet 16 passes through the turning plate 15 and is fixedly connected to the lower end face of the electromagnet 16. Convex teeth 21 are provided on the side wall of the steering wheel 20. The length of the convex teeth 21 is one-half of the circumference of the steering wheel 20, enabling the turning plate 15 to rotate by 180°.

[0047] There are also two symmetrically arranged special-shaped teeth 41 on the steering wheel 20. The special-shaped teeth 41 are placed at both ends of the convex teeth 21. The special-shaped teeth 41 play a role in limiting the movement range of the steering wheel 20.

[0048] The cross-section of the special-shaped guide plate 22 is in a Z shape. The special-shaped guide plate 22 includes a positioning plate 28, a connecting plate 29 and a toothed plate 30. The two ends of the connecting plate 29 are respectively fixedly connected to the positioning plate 28 and the toothed plate 30. The positioning plate 28 is placed between the two limiting plates 23 and is slidably connected to the sliding portion 27. On the upper end face of the toothed plate 30, there are a clamping post 25 and a convex block 24 that cooperate with the convex teeth 21. By turning the steering wheel 20 on the toothed plate 30, the electromagnet 16 is driven to move, and thus the electromagnet 16 drives the mesh cover blank 43 to turn.

[0049] After the turning plate 15 drives the wire mesh blank 43 for bending treatment, the hydraulic cylinder 17 is pushed out, and the limiting plate 23 pushes the special-shaped guide plate 22 to move, thereby driving the steering wheel 20 to rotate, and the electromagnet 16 rotates together with the steering wheel 20 to adjust the direction of the wire mesh blank 43 to be processed.

[0050] As Figure 5 shown, two limiting members 34 for pushing the wire mesh blank 43 onto the turning unit 7 are also installed on the conveyor belt 10. The wire mesh blank 43 is further limited by the limiting members 34, and the placement position of the wire mesh blank 43 can also be confirmed according to the limiting members 34.

[0051] The two limiting members 34 are respectively sleeved on the surface of the conveyor belt 10 on both sides of the rectangularly arranged limiting protrusions 11. The limiting member 34 includes a connecting belt 12 and a number of push rods 13 placed on the connecting belt 12. The push rods 13 are made of metal material. When the wire mesh blank 43 is being transported, the push rods 13 will push the wire mesh blank 43 to make the wire mesh blank 43 enter below the upper die.

[0052] A number of threaded holes 35 penetrating the conveyor belt 10 are equidistantly opened on the connecting belt 12. The push rods 13 are provided with external threads and are fixed to the threaded holes 35. During installation, the connecting belt 12 is sleeved on the conveyor belt 10, and then the push rods 13 are tightened to fix the push rods 13 to the connecting belt 12.

[0053] The push rods 13 completely push the transported wire mesh blank 43 to the lower die 4 and the turning unit 7 to ensure the smooth progress of the stamping work.

[0054] After the speaker grille is processed, it is placed in water for surface cleaning, which can avoid the influence of dust on the surface of the speaker grille on the zinc infiltration result.

[0055] Then the speaker grille that has been cleaned and drained of water is placed in a zinc infiltration furnace for zinc infiltration treatment on the surface of the speaker grille. The strength of the speaker grille after zinc infiltration is higher.

[0056] During galvanizing, the speaker grille is placed in a zinc infiltration furnace, zinc powder is added to the zinc infiltration furnace, the temperature of the zinc infiltration furnace is set to 390 degrees Celsius, and the heating time is set to 35 minutes. After zinc infiltration, the temperature in the zinc infiltration furnace is cooled to 50 degrees Celsius - 80 degrees Celsius.

[0057] If the temperature cooled in the zinc infiltration furnace is lower than 50 degrees Celsius, more time will be consumed, affecting work efficiency. When the cooling temperature is set at 65 degrees Celsius, the cooling time of the wire mesh blank 43 will not be too long to cause too long processing time, and the operator is not easily scalded. If it is higher than 80 degrees Celsius, the worker will be scalded when taking out the speaker grille. Therefore, the range is set to 50 degrees Celsius - 80 degrees Celsius.

[0058] Compared with the existing speaker grilles, the galvanized speaker grilles have the following advantages:

[0059] After the zinc infiltration is completed, place the speaker grille in a cleaning machine to clean the dust and remaining materials remaining on the speaker grille after zinc infiltration; then place the cleaned speaker grille in a dryer and dry it for 5 - 10 minutes to dry the moisture on the surface of the speaker grille; place the dried speaker grille in a packaging machine for packing, and the packaged speaker grilles flow into the market.

[0060] Avoid manually putting the grille blank 43 by the operator, which increases the safety of the operator's work and eliminates the need for manual operation, thus increasing the yield rate of the product.

[0061] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A bending machine for an audio grille, characterized in that: The bending machine comprises a machine body (1), the machine body (1) being provided with a control panel (2), an upper die (3) and a lower die (4), a mounting platform (5) being integrally provided on one side of the machine body (1), the mounting platform (5) being provided with a loading unit (6) disposed on one side of the lower die (4) and a turning unit (7) cooperating with the loading unit (6), An infrared sensor (8) and a distance sensor (9) for sensing the transmission distance of the sound grille are provided on the flip unit (7); the infrared sensor (8) and the distance sensor (9) are both communicatively connected to the control panel (2).

2. A bending machine for an audio grille according to claim 1, characterized in that: The loading unit (6) comprises a driving motor (31), a mounting frame (32), two rollers (33) and a conveyor belt (10), wherein the driving motor (31) is communicatively connected to the control panel (2). The mounting frame (32) is fixed on the mounting platform (5), the two rollers (33) are rotatably connected to the two sides of the mounting frame (32), the driving motor (31) is fixed to one side of the mounting frame (32) and the output end is connected to one of the rollers (33), and the conveyor belt (10) is sleeved on the outer peripheral wall of the roller (33). The end surface of the conveyor belt (10) is provided with a plurality of rectangularly arranged limiting protrusions (11) for positioning the sound grille, and the conveyor belt (10) is also provided with two limiting members (34) for pushing the sound grille onto the flip unit (7).

3. A bending machine for an audio grille according to claim 2, characterized in that: The two limiting members (34) are respectively sleeved on the surface of the conveyor belt (10) and are placed on both sides of the limiting protrusions (11) arranged in a rectangular shape. The limiting member (34) comprises a connecting belt (12) sleeved on the conveyor belt (10) and a plurality of push rods (13) placed on the connecting belt (12). The connecting belt (12) is provided with a plurality of threaded holes (35) penetrating the conveyor belt (10) at equal intervals. The push rods (13) are provided with external threads and are fixed on the threaded holes (35).

4. The bending machine for an audio grille according to claim 1, characterized in that: The turning unit (7) comprises a connecting frame (14) fixed on a mounting platform, a turning plate (15) placed on the connecting frame (14), an adjusting mechanism (36) and a steering mechanism (37); a slot (38) cooperating with the feeding unit (6) is provided on one side of the connecting frame (14); one end of the conveyor belt (10) extends into the slot (38); the adjusting mechanism (36) is hingedly connected to the connecting frame (14); The adjusting mechanism (36) is disposed on one side of the connecting frame (14) and is connected to the flip plate (15) so that the adjusting mechanism (36) controls the flip plate (15) to rotate. The end surface of the connecting frame (14) is provided with a stepped mounting groove (42), the flip plate (15) is placed in the mounting groove (42), the end surface of the flip plate (15) is provided with a stepped placement groove (39), and the flip plate (15) is hinged to the connecting frame (14).

5. The bending machine for an audio grille according to claim 4, characterized in that: The regulating mechanism (36) comprises a hydraulic cylinder (17), a movable plate (19) and a gear (18); the hydraulic cylinder (17) is communicatively connected to the control panel (2). A hydraulic cylinder (17) is disposed on a side wall of the connecting frame (14); an output end of the hydraulic cylinder (17) is connected to a movable plate (19); one end of the movable plate (19) passes through the machine body (1); the movable plate (19) comprises a rack portion (26) and a sliding portion (27); both sides of the sliding portion (27) are provided with limit plates (23); one end of the gear (18) is provided with a connecting rod (40); the other end of the connecting rod (40) passes through the connecting frame (14) and is connected to the flip plate (15); the connecting rod (40) rotates relative to the connecting frame (14); the gear (18) meshes with the rack portion (26); the initial position of the gear (18) is located above the rack portion (26); and the other side wall of the flip plate (15) is hinged to the connecting frame (14).

6. The bending machine for an audio grille according to claim 4, characterized in that: The steering mechanism (37) comprises a special-shaped guide plate (22), an electromagnet (16) and a steering wheel (20), wherein the electromagnet (16) is electrically connected to the control panel (2). The electromagnet (16) is in the shape of a disk. The electromagnet (16) is placed in the placement groove (39). The electromagnet (16) passes through the flip plate (15) and is fixedly connected to the lower end surface of the electromagnet (16). The side wall of the steering wheel (20) is provided with a convex tooth (21). The length of the convex tooth (21) is half of the circumference of the steering wheel (20). The steering wheel (20) is also provided with two symmetrically arranged special-shaped teeth (41). The special-shaped teeth (41) are placed at both ends of the convex tooth (21).

7. A bending machine for an audio grille according to claim 6, characterized in that: The cross section of the special-shaped guide plate (22) is Z-shaped. The special-shaped guide plate (22) comprises a positioning plate (28), a connecting plate (29) and a tooth plate (30). The two ends of the connecting plate (29) are respectively fixedly connected to the positioning plate (28) and the tooth plate (30). The positioning plate (28) is placed between the two limit plates (23) and is slidably connected to the sliding portion (27). The upper end surface of the tooth plate (30) is provided with a clamping column (25) and a protrusion (24) that cooperate with the protruding teeth (21).

8. A processing technology for an acoustic grille, characterized in that: Using a bending machine for an audio grille as described in any one of claims 1 to 7, the processing technology comprises the following steps: S1: cutting, placing the sheet material to be processed in a cutting machine and cutting it into a mesh blank (43); S2: grinding, placing the mesh cover blank (43) in a grinding machine, and grinding the surface of the mesh cover blank (43) by the grinding machine; S3: punching holes, placing the mesh cover blank (43) into a punching machine, so that the surface of the mesh cover blank (43) has holes arranged in a rectangular pattern; S4: Bending, placing the mesh blank (43) with holes punched in it in a bending machine, bending both sides of the mesh blank (43) by the bending machine, and forming the bent mesh blank (43) into an audio mesh; S5: Cleaning: Place the processed audio grille in water to clean the surface; S6: galvanizing, placing the cleaned and drained speaker grille in a zincizing furnace to perform zincizing treatment on the surface of the speaker grille; S7: spraying, placing the cooled sound grille after shearing in a cleaning machine, and cleaning the dust and residual materials left by shearing on the sound grille; S8: Drying: placing the cleaned audio grille in a dryer for 10 minutes to dry the moisture on the surface of the audio grille; S9: Packing: Place the speaker grille in the packaging machine for packaging.

9. The processing technology of the acoustic grille according to claim 8, characterized in that: In the galvanizing step of S6, zinc powder is added into the sherardizing furnace, the temperature of the sherardizing furnace is set to 390 degrees Celsius, the heating time is set to 35 minutes, and after the sherardizing is completed, the temperature in the sherardizing furnace is cooled to 50 degrees Celsius-80 degrees Celsius.

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