Blanking die for horn dust screen production

Abstract

The invention relates to the technical field of blanking dies, in particular to a blanking die for horn dust screen production, which comprises a lower die holder, an upper die holder, a fixed die plate, a movable plate, a movable die plate, a hydraulic cylinder, a blanking part and a supporting part, the dustproof net blanking device can solve the following problems in the blanking process of a dustproof net in the prior art: due to one-time blanking, multiple positions of a metal sheet are stressed at the same time, so that deformation such as warping, twisting or sinking is easily generated, and the quality of a finished product is influenced; rapid assembly and disassembly of a blanking head cannot be achieved, the blanking head can be rapidly adjusted according to the blanking requirement, and limitation exists. The metal sheets are blanked in batches, so that the instantaneous stress areas of the metal sheets are greatly reduced, the areas which are not blanked play a role in supporting and maintaining strength, deformation is effectively restrained, and therefore the quality of finished products is ensured; according to the blanking device, the position of the blanking head can be adjusted according to blanking machining requirements, so that the blanking device is suitable for blanking machining of loudspeaker dust screens of different models.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blanking dies, in particular to a blanking die for producing a dustproof mesh for a loudspeaker. BACKGROUND

[0002] In the loudspeakers (loudspeakers) of mobile phones, earphones and other electronic devices, in order to ensure the dustproof, moistureproof and foreign matter erosion of the loudspeaker, a dustproof mesh is needed to be equipped outside the loudspeaker. In addition, the dustproof mesh also forms a physical barrier for the loudspeaker to prevent external sharp objects from touching or piercing the loudspeaker diaphragm, thereby causing damage or scrapping of the loudspeaker.

[0003] The dustproof mesh of the loudspeaker is usually made of mesh cloth, composite material or metal sheet. The metal dustproof mesh is generally made by stamping. However, there are some problems when the current stamping equipment is used to stamp the dustproof mesh, such as the dustproof mesh after blanking is easily left in the blanking head and cannot automatically fall off. With the development of science and technology, relevant technical personnel in the field have also made a lot of optimization to the corresponding blanking equipment. For example, a blanking device for producing a loudspeaker dustproof mesh is disclosed in Chinese Patent No. CN222856578U, which includes a workbench, a support frame fixedly connected to the top surface of the workbench, an electric cylinder fixedly connected to the inside top surface of the support frame, an installation base fixedly connected to the top surface of the workbench, a lower die body provided on the top surface of the installation base, an upper moving plate provided on the top surface of the installation base, a blanking head fixedly connected to the bottom surface of the upper moving plate, a contraction hole provided in the inside of the upper moving plate, a second return spring provided on the surface of the contraction hole, and a push plate movably connected to the inside of the blanking head at the bottom end of the second return spring.

[0004] When the above-mentioned prior art is used, the electric cylinder pushes the upper moving plate to make the blanking head stamp the dustproof mesh on the top of the lower die body. Then the upper moving plate and the blanking head move up and reset. Since the dustproof mesh is a soft product after blanking, it is left in the inside of the blanking head, so that the second return spring pushes the push plate to move in the inside of the blanking head, and pushes out the blanked dustproof mesh left in the inside of the blanking head.

[0005] However, the above-mentioned prior art has some deficiencies in the process of blanking the dustproof mesh: 1. Since the raw material for blanking the loudspeaker dustproof mesh is a metal sheet, it is easy to deform. The above-mentioned prior art blanks the metal sheet at one time, which causes the metal sheet to be subjected to force at multiple places at the same time when blanking, so that the metal sheet is easy to warp, twist or sag, thereby affecting the quality of the finished product.

[0006] 2. Furthermore, since speakers of different models of electronic devices require dustproof meshes of different shapes and sizes, the shape of the punching head needs to be adjusted according to actual needs. However, the existing technology mentioned above cannot achieve quick installation and removal of the punching head or quick adjustment of the punching head according to punching requirements, thus affecting the efficiency of changing the punching head. Moreover, it cannot adapt to the punching of different models of dustproof meshes, and has limitations.

[0007] Therefore, based on the above-mentioned viewpoints, there is still room for improvement in the existing dustproof netting punching methods. Summary of the Invention

[0008] To address the aforementioned problems, this invention provides a punching die for producing a speaker dustproof net, comprising: a lower die base, with an upper die base mounted on the upper end of the lower die base via multiple guide pillars; a fixed template, with a fixed template mounted on the upper end of the lower die base, and two symmetrically arranged slides on the upper end of the fixed template for placing and conveying metal sheets within the slides, one end of the slide being the loading end and the other end being the unloading end; a movable plate, with a movable plate slidably mounted on the outer wall of the multiple guide pillars, and a moving template mounted on the lower end of the movable plate, with a guide sleeve provided between the fixed template and the moving template; a hydraulic cylinder, with a hydraulic cylinder mounted on the upper end of the upper die base, and the bottom extension end of the hydraulic cylinder connected to the movable plate; two punching sections, symmetrically mounted on the bottom of the moving template, for punching micro-holes in the metal sheet; and two support sections, disposed on the fixed template and corresponding to the positions of the punching sections, for assisting the punching section and supporting the metal sheet upwards during the punching process.

[0009] As a preferred embodiment of the present invention, the punching section includes a plurality of limiting grooves formed at the lower end of the moving template. The plurality of limiting grooves are equidistantly distributed along the length direction of the moving template. An execution device for performing punching operations is provided in the limiting groove. A ring-shaped punching knife is detachably installed on the side of the lower end of the moving template near the blanking end for punching the part of the micro-hole punching. The ring-shaped punching knife and the plurality of limiting grooves are arranged in an array at equal intervals. A top contact spring rod is provided on the inner top wall of the ring-shaped punching knife, and a top plate is provided at the bottom of the top contact spring rod.

[0010] As a preferred embodiment of the present invention, the lower end of the moving template is provided with two pressing plates located at the bottom of the punching section, and multiple elastic telescopic plates are provided between the upper end of the pressing plates and the moving template. The multiple elastic telescopic plates are spaced apart from multiple limiting grooves and annular punching blades, and multiple through holes corresponding to the positions of the limiting grooves and annular punching blades are provided on the pressing plates.

[0011] As a preferred technical solution of the present invention, the actuator includes two displacement blocks symmetrically slidably disposed in the limiting groove, and a punching head is installed at the lower end of the displacement block. The distance between the two displacement blocks in the multiple limiting grooves decreases sequentially from the loading end to the unloading end. The two adjusting rods are arranged to be rotatable through the plurality of limiting grooves on the same side of the movable die plate, a plurality of double-headed threaded rods are arranged on the adjusting rods and located in the limiting grooves respectively, the double-headed threaded rods pass through the two displacement blocks in the limiting grooves through threaded connection, and a positioning ring is arranged on the middle of the double-headed threaded rods.

[0012] As a preferred technical solution of the present application, the pitches of the surface threads of the plurality of double-headed threaded rods gradually decrease from the feeding end to the discharging end, and the plurality of adjusting rods are connected through belt transmission.

[0013] As a preferred technical solution of the present application, the bottom of the displacement block is provided with a positioning sleeve at both ends, one of the positioning sleeves is provided with an opening at the lower end, a cover is hinged to the opening, the cover and the positioning sleeve are clamped to each other, a plurality of baffle plates are arranged on the length direction of the lower end of the displacement block at equal intervals, the blanking head is composed of a connecting seat and a micro punch, a plurality of micro punches are arranged on the connecting seat at equal intervals, and the connecting seat is abutted in the positioning sleeve at both ends.

[0014] As a preferred technical solution of the present application, the length direction of the displacement block is provided with a bearing strip on the outer wall of both sides, the bearing strip is provided with a supporting spring rod through a plurality of connecting rods arranged at equal intervals at the lower end, a plurality of supporting spring rods are arranged on the lower end of the auxiliary pressing plate, and the auxiliary pressing plate is provided with a through hole for the micro punch to pass through in the middle.

[0015] As a preferred technical solution of the present application, the supporting part includes a plurality of grooves arranged on the upper end of the fixed die plate, the plurality of grooves correspond to the positions of the limiting grooves, the lower end of the groove is provided with a discharging hole connected with the outside, the inner wall of the groove is provided with two supporting seats, the upper end of the supporting seat is flush with the inner bottom wall of the slide, the positions of the two supporting seats in each groove correspond to the positions of the two displacement blocks in the corresponding limiting grooves, a plurality of accommodation holes for the micro punch to punch micro holes on the metal sheet are arranged on the supporting seat, and a punching hole matched with the annular blanking cutter is arranged on the supporting seat close to the discharging end.

[0016] As a preferred technical solution of the present application, the supporting part further includes an L-shaped groove, two L-shaped grooves are symmetrically arranged on the inner wall of the groove along every two supporting seats, the vertical section of the L-shaped groove penetrates upward after penetrating through the fixed die plate, the vertical sections of the two L-shaped grooves on the same side of the groove length direction are staggered arranged, the two ends of the supporting seat are provided with a linkage frame slidingly connected in the L-shaped groove, and a guide correction device for correcting the positions of the blanking head and the supporting seat is arranged between the linkage frame and the auxiliary pressing plate.

[0017] As a preferred technical scheme of the present application, the guiding and correcting device comprises a positioning plate installed on the upper end of the vertical section of the linkage frame, the positioning plate has a hollow groove inside, and a guide groove is formed in the side of the positioning plate close to the hollow groove and connected with the hollow groove; L-shaped folding rods are installed at both ends of the auxiliary pressing plate, the vertical sections of the L-shaped folding rods extend downward and correspond to the position of the positioning plate, and a limiting plate is arranged at the bottom of the vertical section of the L-shaped folding rod, and the side of the limiting plate away from the hollow groove is provided with a guide block that slides in the hollow groove through a connecting pin. The upper half of the positioning plate, the hollow groove and the guide groove are all inverted triangular structures that gradually decrease from top to bottom, and the lower half of the positioning plate, the hollow groove and the guide groove are all vertical structures.

[0018] In summary, the present application has the following beneficial technical effects: Firstly, the present application greatly reduces the instantaneous stress area of the metal sheet by batch punching, and the area that is not punched plays a supporting and maintaining strength role, effectively inhibiting overall deformation, thereby ensuring the quality of the final product.

[0019] Secondly, the present application can modularize multiple punching head modules through the batch punching mode, thereby decomposing the overall punching head into multiple modules that can be independently replaced, so that if the punching head is damaged, only the module where the punching head is located needs to be replaced, without the need to replace the entire punching head, effectively reducing costs and facilitating maintenance.

[0020] Thirdly, when the double-thread rod rotates, the threads with different pitches on the surface of the double-thread rod make the displacement blocks in the multiple limiting grooves adjust at equal proportions, and the displacement blocks drive the punching head to adjust synchronously, so that the position of the punching head can be adjusted according to the punching processing requirements, and the longitudinal arrangement interval of the punching area micropores of the metal sheet is adjusted, so as to adapt to punching processing of different models of horn dustproof nets, greatly improving the adaptability range of the present application.

[0021] Fourthly, after the metal sheet is pressed and fixed by the pressing plate, the movable die plate continues to move downward and drives the auxiliary pressing plate to press and fix the metal sheet again, thereby ensuring the stability of the punching position of the metal sheet, avoiding the deformation of the metal sheet caused by the deviation of the metal sheet or the warping of the micropores after punching, and improving the punching precision.

[0022] Fifthly, when the movable die plate moves downward, the L-shaped folding rod, the limiting plate, the connecting pin and the guide block are driven by the auxiliary pressing plate to move downward as a whole, so that the guide block and the connecting pin slide into the hollow groove and the guide groove respectively, and the L-shaped folding rod drives the positioning plate and the supporting seat to move adaptively through the guide block, so that the supporting seat is corrected to be directly below the punching head, thereby ensuring the precise butt joint of the micropunch and the punching hole, and facilitating the precise punching of the metal sheet. BRIEF DESCRIPTION OF DRAWINGS

[0023] The application will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 is a structural schematic diagram of the application.

[0025] Figure 2 is a structural schematic diagram between the movable die plate and the punching part of the application.

[0026] Figure 3 is a structural schematic diagram of the punching part of the application.

[0027] Figure 4 is a partial enlarged view of A of the application. Figure 3

[0028] Figure 5 is a structural schematic diagram between the displacement block, the punching head and the double-threaded rod of the application.

[0029] Figure 6 is a partial enlarged view of B of the application. Figure 5

[0030] Figure 7 is a structural schematic diagram between the recess, the material discharging hole and the support seat of the application.

[0031] Figure 8 is a structural schematic diagram of the support part of the application.

[0032] Figure 9 is a structural schematic diagram between the support seat, the linkage frame and the guiding and correcting device of the application.

[0033] Figure 10 is a structural schematic diagram between the recess, the support seat and the positioning plate of the application.

[0034] Figure 11 is a partial enlarged view of C of the application. Figure 10

[0035] ​​​In the figure, 1, lower die seat; 2, guide column; 3, upper die seat; 4, fixed die plate; 5, movable plate; 6, movable die plate; 61, pressing plate; 62, elastic expansion plate; 7, hydraulic cylinder; 8, blanking part; 81, limiting groove; 82, execution device; 821, displacement block; 822, blanking head; 823, adjusting rod; 824, double-threaded rod; 825, positioning ring; 826, positioning sleeve; 827, cover; 828, baffle; 829, connecting seat; 830, micro punch; 831, bearing strip; 832, connecting rod; 833, supporting spring rod; 834, auxiliary pressing plate; 84, annular blanking knife; 841, top-touch spring rod; 842, top plate; 9, supporting part; 91, groove; 92, discharge hole; 93, supporting seat; 94, L-shaped slot; 95, linkage frame; 96, guiding and correcting device; 961, positioning plate; 962, hollow groove; 963, guide groove; 964, L-shaped folding rod; 965, limiting plate; 966, connecting pin; 967, guide block. DETAILED DESCRIPTION

[0036] The following will be described in detail in combination with the accompanying drawings Figures 1-11 The embodiments of the present application are described in detail.

[0037] The embodiments of the present application disclose a blanking die for loudspeaker dustproof net production. It should be noted that the blanking die for loudspeaker dustproof net production of the present application is mainly applied to the process of blanking loudspeaker dustproof net. In terms of technical effect, it can blank metal sheet in batches, greatly reduces the instantaneous stress area of the metal sheet, and the unblanked area plays a supporting and maintaining strength role, effectively inhibits the overall deformation, and ensures the quality of the final product. Especially during blanking processing, the metal sheet can be fixed by secondary pressing, ensuring the stability of the blanking position of the metal sheet, avoiding the offset of the metal sheet or the lifting of the micro holes after blanking affecting the blanking precision; further, the blanking die for loudspeaker dustproof net production of the present application can also adjust the distance of the blanking head 822, and then adjust the longitudinal arrangement distance of the micro holes in the blanking area of the metal sheet, so as to adapt to the blanking processing of loudspeaker dustproof nets of different models.

[0038] Reference Figure 1 and Figure 2As shown, a kind of blanking die for horn dust screen production, including lower die seat 1, upper die seat 3 is installed on the lower die seat 1 upper end by multiple guide columns 2;Fixed die plate 4, the lower die plate upper end is provided with fixed die plate 4, two slide ways are opened in the upper end of fixed die plate 4 symmetrically, for placing metal sheet in slide way and conveying, one end of slide way is feeding end, and the other end is discharging end;Movable plate 5, movable plate 5 is slidably arranged on the outer wall of multiple guide columns 2, movable plate 5 lower end is installed with movable die plate 6, guiding sleeve is arranged between fixed die plate 4 and movable die plate 6, for the orientation of fixed die plate 4 and movable die plate 6, ensure that movable die plate 6 is accurately docked with fixed die plate 4 when moving down;Hydraulic cylinder 7, hydraulic cylinder 7 is installed on the upper end of upper die seat 3, the bottom telescopic end of hydraulic cylinder 7 is connected with movable plate 5, blanking part 8, two and symmetrically installed in the bottom of movable die plate 6, for punching micro-hole on metal sheet, two blanking parts 8 correspond to the position of two slide ways;Support part 9, it is provided on fixed die plate 4, it has two and correspond to the position of blanking part 8, for assisting blanking part 8, in the process of blanking, metal sheet is supported upwards.

[0039] In the specific implementation process, first, the metal sheet to be blanked is placed in the slide way on the fixed die plate 4, then the metal sheet is intermittently conveyed along the length direction of the slide way by the external traction equipment, during which, the hydraulic cylinder 7 is started, the hydraulic cylinder 7 drives the movable plate 5 and the movable die plate 6 to reciprocate up and down as a whole, the movable die plate 6 drives the blanking part 8 to move synchronously, when the movable die plate 6 drives the blanking part 8 to move down to blank the metal sheet, the traction equipment makes the metal sheet pause conveying, so that the metal sheet is in a static state when blanking, to avoid affecting the blanking accuracy;In the process of blanking, the fixed die plate 4 can support the metal sheet, so that the metal sheet always remains horizontal when blanking;Subsequently, the traction equipment continues to convey the metal sheet, and cooperates with the blanking part 8 and the support part 9 to intermittently and continuously blank the metal sheet, which can improve the blanking efficiency.

[0040] Refer to Figure 2 And Figure 3As shown, in order to be able to discharge the finished product punched and the stability of the metal sheet during the punching process, so in this embodiment, the punching part 8 includes a plurality of limiting grooves 81 opened in the lower end of the movable die plate 6, a plurality of limiting grooves 81 are equidistantly distributed along the length direction of the movable die plate 6, the limiting groove 81 is provided with an execution device 82 for performing punching work, the lower end of the movable die plate 6 is installed with an annular punching knife 84 on one side close to the blanking end in a detachable manner, in order to facilitate the quick installation, disassembly and adaptive replacement according to the type of dust screen of the annular punching knife 84, the annular punching knife 84 is used to punch the part of the micro hole punching, and the annular punching knife 84 and the plurality of limiting grooves 81 are arrayed equidistantly, the inner top wall of the annular punching knife 84 is provided with a top touch spring rod 841, the bottom of the top touch spring rod 841 is provided with a top plate 842, the top touch spring rod 841 always applies a pushing force to the top plate 842, so that the top plate 842 extends downward and is located at the bottom of the annular punching knife 84 in the initial state, so that after the annular punching knife 84 completes the punching, the top plate 842 can timely push out the finished product of the inner wall of the annular punching knife 84, avoiding affecting the normal progress of subsequent punching work due to residual in the annular punching knife 84.

[0041] Continuing to refer to Figure 2 As shown, in order to avoid the metal sheet from producing deviation during the punching process and affecting the punching precision, so in this embodiment, the metal sheet can be pressed and limited, specifically, the lower end of the movable die plate 6 is provided with two pressing plates 61 located at the bottom of the punching part 8 respectively, a plurality of elastic expansion plates 62 are arranged between the upper end of the pressing plate 61 and the movable die plate 6, the plurality of elastic expansion plates 62 are arranged in intervals with the plurality of limiting grooves 81 and the annular punching knife 84, a plurality of through holes corresponding to the positions of the limiting grooves 81 and the annular punching knife 84 are opened on the pressing plate 61, the elastic expansion plate 62 always applies a supporting force to the pressing plate 61, so that the pressing plate 61 is located at the lowest position in the initial state, at this time, the pressing plate 61 is located at the bottom of the execution device 82 and the annular punching knife 84.

[0042] In the specific implementation process, after the metal sheet is conveyed below the movable die plate 6, the hydraulic cylinder 7 drives the movable die plate 6 to move downward, the movable die plate 6 drives the elastic expansion plate 62 and the pressing plate 61 to move downward as a whole, so that the pressing plate 61 first abuts against the upper end of the metal sheet, then the movable die plate 6 continues to move downward and applies pressure to the pressing plate 61 through the elastic expansion plate 62, thereby increasing the pressing intensity of the pressing plate 61 to the metal sheet, ensuring the stability and punching precision of the metal sheet, and preventing the metal sheet from producing deviation and affecting the punching effect; then the movable die plate 6 drives the execution device 82 to punch high-density micro holes on the metal sheet; when the metal sheet punched with micro holes is conveyed below the annular punching knife 84, the annular punching knife 84 can punch the metal sheet with micro holes, so that the punched part is the finished product of the dust screen of the horn.

[0043] Referring to Figure 3And Figure 4 As the metal sheet is prone to deformation, the metal sheet is prone to deformation when subjected to high-density micro-hole blanking. To avoid this problem, the metal sheet can be blanked in batches in the embodiment. Specifically, the execution device 82 includes two displacement blocks 821 symmetrically slidingly arranged in the limiting groove 81. The lower end of the displacement block 821 is provided with a blanking head 822. The spacing between the two displacement blocks 821 in the plurality of limiting grooves 81 gradually decreases from the feeding end to the discharging end. Two adjusting rods 823 are rotatably arranged between the plurality of limiting grooves 81 on the same side of the movable die plate 6. A plurality of double-headed threaded rods 824 are arranged in the limiting grooves 81. The double-headed threaded rods 824 pass through the two displacement blocks 821 in the limiting grooves 81 through threaded connection. The double-headed threaded rods 824 are self-locking screws to automatically lock after rotation. A positioning ring 825 is fixedly arranged in the middle of the double-headed threaded rod 824 to limit the mutual abutment of the two displacement blocks 821 when they move to the minimum distance.

[0044] Further, in the embodiment, the pitch of the threads on the surfaces of the plurality of double-headed threaded rods 824 gradually decreases from the feeding end to the discharging end. The plurality of adjusting rods 823 are connected through belt transmission. When one of the adjusting rods 823 is rotated, the other adjusting rods 823 are synchronously rotated.

[0045] In the specific implementation process, the movable die plate 6 drives the displacement blocks 821 and the blanking head 822 to synchronously move downward, so that the blanking head 822 performs blanking processing on the metal sheet. During the intermittent conveying of the metal sheet from the feeding end to the discharging end, the blanking head 822 in the plurality of limiting grooves 81 successively blanks a plurality of longitudinally arranged micro-holes in the same blanking area of the metal sheet. The number of micro-holes increases with the increase of the blanking times. When the metal sheet is conveyed to the lower end of the limiting groove 81 near the discharging end, the micro-holes in the blanking area of the metal sheet are blanked. In this way, the metal sheet is blanked in batches. Finally, the micro-hole area that has been blanked is punched out by the annular blanking knife 84 to form the final product. During each blanking, the instantaneous stress area of the metal sheet is greatly reduced. The unblanked area plays a supporting and maintaining role, effectively inhibiting the overall deformation, thereby ensuring the quality of the final product. In addition, the batch blanking method can modularize the plurality of blanking heads 822, so that the overall blanking head 822 is divided into a plurality of independent replaceable modules. If the blanking head 822 is damaged, only the module needs to be replaced, without the need to replace the entire blanking head 822, effectively reducing the cost and facilitating maintenance.

[0046] In addition, the punching area micropore longitudinal arrangement pitch of the metal sheet can be adjusted in the embodiment, specifically, the adjusting rod 823 is rotated, the double-headed threaded rod 824 is synchronously rotated by the adjusting rod 823, the two displacement blocks 821 in the limiting groove 81 are synchronously moved or synchronously moved away by the double-headed threaded rod 824, and the displacement blocks 821 in the plurality of limiting grooves 81 are adjusted in proportion by the double-headed threaded rod 824 through threads with different pitches, so that the position of the punching head 822 can be adjusted according to the punching processing requirement, and then the longitudinal arrangement pitch of the punching area micropore of the metal sheet is adjusted, so as to adapt to punching processing of different models of horn dust screens, and the adaptability range of the application is greatly improved.

[0047] Referring to Figure 5 and Figure 6 In order to facilitate the quick installation and disassembly of the punching head 822, in the embodiment, the positioning sleeve 826 is arranged at both ends of the bottom of the displacement block 821, one of the positioning sleeves 826 has an opening at the lower end, and the opening is hinged with the cover 827, the cover 827 and the positioning sleeve 826 are clamped with each other, a plurality of equally spaced baffles 828 are arranged on both sides of the length direction of the lower end of the displacement block 821, the punching head 822 is composed of the connecting seat 829 and the micro punch 830, a plurality of equally spaced micro punches 830 are arranged on the lower end of the connecting seat 829, both ends of the connecting seat 829 abut against the positioning sleeve 826, and then the connecting seat 829 is limited and fixed through the mutual cooperation of the cover 827 and the positioning sleeve 826, and the connecting seat 829 can be quickly disassembled after the cover 827 is opened; in addition, the connecting seat 829 can be provided with single, double or multiple micro punches 830 on the lower end, so as to reduce or increase the number of holes of the horn dust screen according to the actual processing requirement.

[0048] Continuing to refer to Figure 6 Since the through hole on the pressing plate 61 is larger than the micro punch 830, the metal sheet can not be accurately fixed by only pressing and fixing the metal sheet by the pressing plate 61, so the metal sheet can be secondarily fixed in the embodiment, specifically, the bearing strip 831 is arranged on both sides of the length direction of the outer wall of the displacement block 821, the supporting spring rod 833 is arranged on the lower end of the bearing strip 831 through a plurality of equally spaced connecting rods 832, the auxiliary pressing plate 834 is commonly arranged on the lower end of the plurality of supporting spring rods 833, the supporting spring rod 833 always applies downward extrusion force to the auxiliary pressing plate 834, so that the auxiliary pressing plate 834 is located at the lowest position in the initial state, at this time, the auxiliary pressing plate 834 is located at the bottom of the micro punch 830, and the auxiliary pressing plate 834 is located above the pressing plate 61, and the through hole is arranged in the middle of the auxiliary pressing plate 834, and the plurality of micro punches 830 pass through the through hole.

[0049] In the implementation process, when the movable die plate 6 moves downward, the displacement blocks 821, the micro punch 830, the bearing strips 831 and the auxiliary pressing plate 834 move downward as a whole. After the pressing plate 61 presses and fixes the metal sheet, the movable die plate 6 continues to move downward and drives the auxiliary pressing plate 834 to press and fix the metal sheet again, so as to ensure the stability of the punching position of the metal sheet, avoid the metal sheet from being deformed due to the deviation of the metal sheet or the lifting of the micro hole after the punching, and improve the punching precision.

[0050] Referring to Figure 7 and Figure 8 As shown in the drawings, in order to ensure the stability of the metal sheet during the punching process and to support the metal sheet to ensure the normal punching, the support part 9 is further provided in the embodiment. Specifically, the support part 9 includes a plurality of grooves 91 formed in the upper end of the fixed die plate 4. The grooves 91 correspond to the position of the limiting grooves 81 in position. The lower end of the groove 91 is provided with a discharge hole 92 connected to the outside. The inner wall of the groove 91 is provided with two support seats 93. The upper end of the support seat 93 is flush with the inner bottom wall of the slide. The two support seats 93 in each groove 91 correspond to the position of the two displacement blocks 821 in the corresponding limiting groove 81. A plurality of accommodation holes are formed in the support seat 93 and matched with the punching head 822 to punch the micro hole of the metal sheet. The support seat 93 near the discharging end is provided with a punching hole matched with the annular punching cutter 84.

[0051] Further, in the embodiment, the support part 9 further includes an L-shaped groove 94. Two L-shaped grooves 94 are symmetrically formed in the inner wall of the groove 91 along every two support seats 93. The vertical section of the L-shaped groove 94 penetrates the fixed die plate 4 upward. The vertical sections of the two L-shaped grooves 94 on the same side of the groove 91 are staggered. The two ends of the support seat 93 are provided with a linkage frame 95 slidingly connected in the L-shaped groove 94. The linkage frame 95 and the auxiliary pressing plate 834 are provided with a guide correction device 96 for correcting the position of the punching head 822 and the support seat 93.

[0052] Referring to Figure 9 , Figure 10 and Figure 11As shown, in the embodiment, the guiding and correcting device 96 comprises a positioning plate 961 mounted on the upper end of the vertical section of the linkage frame 95, the positioning plate 961 has a hollow groove 962 inside, and a guide groove 963 is formed in the side of the positioning plate 961 close to the recess 91 and communicates with the hollow groove 962, L-shaped folding rods 964 are mounted at both ends of the auxiliary pressing plate 834, the vertical sections of the L-shaped folding rods 964 extend downward and correspond to the positions of the positioning plate 961, limit plates 965 are arranged at the bottom of the vertical sections of the L-shaped folding rods 964, and guide blocks 967 slidingly abutting in the hollow groove 962 are arranged on the side of the limit plates 965 away from the recess 91 through connecting pins 966; the upper halves of the positioning plate 961, the hollow groove 962 and the guide groove 963 are all inverted triangular structures gradually decreasing from top to bottom, so that the top openings of the hollow groove 962 and the guide groove 963 guide the abutment of the guide blocks 967 and the connecting pins 966, and the lower halves of the positioning plate 961, the hollow groove 962 and the guide groove 963 are all vertical structures.

[0053] In the specific implementation process, when the traction device conveys the metal sheet from the feeding end to the discharging end, the metal sheet is located on the upper end of the supporting seat 93, and when the movable die plate 6 drives the punching head 822 to move downward, the L-shaped folding rods 964, the limit plates 965, the connecting pins 966 and the guide blocks 967 are driven by the auxiliary pressing plate 834 to move downward as a whole, so that the guide blocks 967 slide into the hollow groove 962, and as the guide blocks 967 gradually move downward, the connecting pins 966 abut against the inner wall of the guide groove 963, and the limit plates 965 slidingly abut against the side of the positioning plate 961 close to the recess 91, so that the position correction between the L-shaped folding rods 964 and the positioning plate 961 can be realized through the mutual cooperation between the limit plates 965, the connecting pins 966, the guide blocks 967 and the positioning plate 961, and since the L-shaped folding rods 964 can only move upward and downward and cannot move in other directions, when the guide blocks 967 move downward to the bottom of the hollow groove 962, the L-shaped folding rods 964 drive the positioning plate 961 and the supporting seat 93 to move adaptively through the guide blocks 967, so that the supporting seat 93 is corrected to be directly below the punching head 822, thereby ensuring the precise butt joint of the micro-punching head 830 and the punching hole and facilitating the precise punching of the metal sheet.

[0054] In addition, the mutual cooperation between the L-shaped folding rods 964, the limit plates 965, the connecting pins 966, the guide blocks 967 and the positioning plate 961 can also correct the positioning plate 961 after the distance adjustment of the punching head 822 is completed, thereby facilitating the adaptive adjustment of the positioning plate 961 and the supporting seat 93.

[0055] Working time: first step: first, the metal sheet to be punched is placed in the slide on the fixed die plate 4, and then the metal sheet is intermittently conveyed along the length direction of the slide by the external traction device. In this period, the hydraulic cylinder 7 is started, the hydraulic cylinder 7 drives the movable plate 5 and the movable die plate 6 to reciprocate up and down as a whole, the movable die plate 6 drives the punching part 8 to cooperate with the supporting part 9 to punch the metal sheet, when the movable die plate 6 drives the punching part 8 to move downward to punch the metal sheet, the traction device makes the metal sheet pause conveying; then the traction device continues to convey the metal sheet, and cooperates with the punching part 8 and the supporting part 9 to punch the metal sheet intermittently and continuously.

[0056] Second step: after the metal sheet is conveyed to the lower side of the movable die plate 6, the hydraulic cylinder 7 drives the movable die plate 6 to move downward, the movable die plate 6 drives the elastic expansion plate 62 and the pressing plate 61 to move downward as a whole, so that the pressing plate 61 abuts against the upper end of the metal sheet, ensuring the stability and punching precision of the metal sheet; then the movable die plate 6 continues to move downward and drives the auxiliary pressing plate 834 to press and fix the metal sheet for the second time, so as to ensure the stability of the punching position of the metal sheet.

[0057] Third step: when the movable die plate 6 moves downward, the displacement block 821 and the punching head 822 move downward synchronously, so that the punching head 822 punches the metal sheet, and in the intermittent conveying process of the metal sheet from the feeding end to the discharging end, a plurality of longitudinal arranged micro-holes are punched in the same punching area of the metal sheet by the punching head 822 in the plurality of limiting grooves 81, and the number of the micro-holes increases with the increase of the punching times, and when the metal sheet is conveyed to the lower end of the limiting groove 81 near the discharging end, the punching of the micro-holes in the punching area of the metal sheet is completed, so as to realize the batch punching of the metal sheet, and finally the micro-hole area punched out by the annular punching cutter 84 forms the final product.

[0058] Fourth step: rotating the adjusting rod 823, the adjusting rod 823 drives the double-headed threaded rod 824 to rotate synchronously, so that the double-headed threaded rod 824 drives the two displacement blocks 821 in the limiting groove 81 to move synchronously or move away from each other, and when the double-headed threaded rod 824 adjusts the displacement blocks 821 in the plurality of limiting grooves 81 through different pitches of threads, the displacement blocks 821 in the plurality of limiting grooves 81 are adjusted in proportion, and the displacement blocks 821 drive the punching head 822 to adjust synchronously, so as to adjust the position of the punching head 822 according to the punching processing requirement, and then adjust the longitudinal arrangement interval of the micro-holes in the punching area of the metal sheet, so as to adapt to the punching processing of different models of dustproof net for loudspeakers.

[0059] In the fifth step, when the movable die plate 6 and the blanking head 822 move downward, the L-shaped folding rod 964, the limiting plate 965, the connecting pin 966 and the guide block 967 are driven to move downward as a whole by the auxiliary pressing plate 834, so that the guide block 967 slides into the hollow slot 962, and as the guide block 967 gradually moves downward, the connecting pin 966 abuts against the inner wall of the guide slot 963, and the limiting plate 965 slides against the positioning plate 961 on the side close to the groove 91, so that the position between the L-shaped folding rod 964 and the positioning plate 961 is corrected through the cooperation between the limiting plate 965, the connecting pin 966, the guide block 967 and the positioning plate 961, the L-shaped folding rod 964 drives the positioning plate 961 and the support seat 93 to move adaptively through the guide block 967, so that the support seat 93 is corrected to be directly below the blanking head 822, thereby ensuring that the micro punch 830 and the punching hole are precisely connected, and facilitating precise blanking of the metal sheet.

[0060] In the sixth step, after the annular blanking knife 84 completes the final blanking, the top plate 842 can timely push the finished product out of the inner wall of the annular blanking knife 84 under the action of the top touch spring rod 841, so as to avoid affecting the normal operation of the subsequent blanking operation.

[0061] It is obvious for those skilled in the art that the present application is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application.

[0062] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A punching die for producing a loudspeaker dustproof net, characterized in that, include: The lower mold base (1) has an upper mold base (3) installed on its upper end via multiple guide pillars (2); Fixed template (4), fixed template (4) is set at the upper end of the lower template. Two slides are symmetrically opened at the upper end of the fixed template (4) for placing metal sheets in the slides for conveying. One end of the slide is the loading end and the other end is the unloading end. The movable plate (5) is slidably provided on the outer wall of multiple guide columns (2). A movable template (6) is installed at the lower end of the movable plate (5). A guide sleeve is provided between the fixed template (4) and the movable template (6). Hydraulic cylinder (7), the upper mold base (3) is equipped with a hydraulic cylinder (7), the bottom telescopic end of the hydraulic cylinder (7) is connected to the movable plate (5), The punching section (8) has two parts that are symmetrically installed at the bottom of the moving template (6) for punching micro-holes in the metal sheet; Support (9) is provided on the fixed template (4), and has two parts corresponding to the position of the punching part (8). It is used to assist the punching part (8) in supporting the metal sheet upward during the punching process.

2. The punching die for producing a speaker dustproof net according to claim 1, characterized in that: The punching section (8) includes multiple limiting grooves (81) opened at the lower end of the moving template (6). The multiple limiting grooves (81) are equidistantly distributed along the length direction of the moving template (6). An execution device (82) for performing punching operations is provided in the limiting grooves (81). A ring punching knife (84) is detachably installed on the side of the lower end of the moving template (6) near the blanking end for punching the part completed by micro-hole punching. The ring punching knife (84) and the multiple limiting grooves (81) are arranged in an array at equal intervals. A top contact spring rod (841) is provided on the inner top wall of the ring punching knife (84), and a top plate (842) is provided at the bottom of the top contact spring rod (841).

3. The punching die for producing a speaker dustproof net according to claim 2, characterized in that: The lower end of the moving template (6) is provided with two pressing plates (61) located at the bottom of the punching section (8). Multiple elastic telescopic plates (62) are provided between the upper end of the pressing plate (61) and the moving template (6). The multiple elastic telescopic plates (62) are spaced apart from multiple limiting grooves (81) and annular punching cutter (84). Multiple through holes corresponding to the positions of the limiting grooves (81) and annular punching cutter (84) are provided on the pressing plate (61).

4. The punching die for producing a speaker dustproof net according to claim 2, characterized in that: The actuator (82) includes two displacement blocks (821) symmetrically slidably disposed in the limiting groove (81). A punching head (822) is installed at the lower end of the displacement block (821). The distance between the two displacement blocks (821) in the multiple limiting grooves (81) decreases sequentially from the loading end to the unloading end. Two adjusting rods (823) are installed on the multiple limiting grooves (81) on the same side of the moving template (6) to rotate together. Multiple double-ended threaded rods (824) are installed on the adjusting rods (823) respectively located inside the limiting grooves (81). The double-ended threaded rods (824) pass through the two displacement blocks (821) inside the limiting grooves (81) by means of threaded connection.

5. The punching die for producing a speaker dustproof net according to claim 4, characterized in that: The pitch of the threads on the surfaces of the multiple double-threaded rods (824) gradually decreases from the loading end to the unloading end. The multiple adjusting rods (823) are connected by belt drive, and a positioning ring (825) is fixedly sleeved in the middle of the double-threaded rods (824).

6. The punching die for producing a speaker dustproof net according to claim 4, characterized in that: The displacement block (821) has positioning sleeves (826) at both ends of its bottom. One of the positioning sleeves (826) has an opening at its lower end, and a cover (827) is hinged to the opening. The cover (827) and the positioning sleeve (826) are engaged with each other. Multiple baffles (828) are installed on both sides of the lower length direction of the displacement block (821). The punching head (822) consists of a connecting seat (829) and a micro punch (830). Multiple micro punches (830) are provided at the lower end of the connecting seat (829). Both ends of the connecting seat (829) abut against the positioning sleeve (826).

7. A punching die for producing a speaker dustproof net according to claim 4, characterized in that: The displacement block (821) has a bearing strip (831) installed on both outer walls along its length. The lower end of the bearing strip (831) is provided with a support spring rod (833) through a plurality of equally spaced connecting rods (832). The lower ends of the plurality of support spring rods (833) are jointly provided with an auxiliary pressure plate (834). The middle part of the auxiliary pressure plate (834) has a through hole for a plurality of micro punches (830) to pass through.

8. The punching die for producing a speaker dustproof net according to claim 1, characterized in that: The support part (9) includes multiple grooves (91) opened on the upper end of the fixed template (4). The multiple grooves (91) correspond to the positions of the limiting grooves (81). The lower end of the groove (91) is provided with a discharge hole (92) connected to the outside. The inner wall of the groove (91) is provided with two support seats (93). The upper end of the support seats (93) is flush with the inner bottom wall of the slide. The two support seats (93) in each groove (91) correspond to the two displacement blocks (821) in the corresponding limiting groove (81). The support seats (93) are provided with multiple clearance holes that cooperate with the punching head (822) to punch micro holes in the metal sheet. The support seats (93) near the unloading end are provided with punching holes that cooperate with the annular punching knife (84).

9. A punching die for producing a speaker dustproof net according to claim 4, characterized in that: The support part (9) also includes an L-shaped groove (94). Two L-shaped grooves (94) are symmetrically opened on the inner wall of the groove (91) along every two support seats (93). The vertical section of the L-shaped groove (94) passes through the fixed template (4) and then goes upward. The vertical sections of the two L-shaped grooves (94) on the same side of the groove (91) are staggered. Both ends of the support seat (93) are equipped with a linkage frame (95) that slides and docks in the L-shaped groove (94). A guide correction device (96) for correcting the position of the punch head (822) and the support seat (93) is provided between the linkage frame (95) and the auxiliary pressure plate (834).

10. A punching die for producing a speaker dustproof net according to claim 9, characterized in that: The guiding and correcting device (96) includes a positioning plate (961) installed on the upper end of the vertical section of the linkage frame (95). The positioning plate (961) has a hollow groove (962) inside, and a guide groove (963) connected to the hollow groove (962) is opened on the side of the positioning plate (961) near the groove (91). L-shaped folding rods (964) are installed at both ends of the auxiliary pressure plate (834). The vertical section of the L-shaped folding rod (964) extends downward and corresponds to the position of the positioning plate (961). A limiting plate (965) is provided at the bottom of the vertical section of the L-shaped folding rod (964). A guide block (967) that slides against the hollow groove (962) is provided on the side of the limiting plate (965) away from the groove (91) through a connecting pin (966). The upper half of the positioning plate (961), the hollow groove (962) and the guide groove (963) are all inverted triangular structures that gradually decrease in size from top to bottom, and the lower half of the positioning plate (961), the hollow groove (962) and the guide groove (963) are all vertical structures.

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