Mesh punching die

Abstract

The utility model relates to a mesh punching die. The mesh punching die comprises an upper die and a lower die, the mesh punching die is ingenious in design, and the punching needle module comprises at least two rows of punching needles arranged front and back; the plurality of punching needles in the front row and the plurality of punching needles in the rear row are mutually staggered; the previous punching range and the next punching range are partially overlapped, the punched holes are staggered, and it is guaranteed that the punched holes are not overlapped every time; after the punching action is repeated for multiple times, uniformly distributed meshes are gradually formed in the sample plate, a plurality of punching dies do not need to punch in sections, the cost is low, and during punching each time, a plurality of punching needles in the front row and a plurality of punching needles in the rear row are mutually staggered, so that the stress generated during punching can be better and uniformly distributed, and the punching efficiency is improved. The deformation and fracture risks of the sample plate can be greatly reduced; in addition, the positions of the holes are more accurate, the hole diameters are more consistent, and the overall quality of the punching net is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and more specifically, to a punching die for punching mesh holes. Background Art

[0002] A punching die for punching mesh holes is a die specifically used for punching holes with specific shapes on metal sheets, plastic sheets or other materials. This kind of die is widely used in the manufacturing industry, especially in industries such as automobiles, household appliances, electronics, and hardware. When producing products such as air conditioner panels, automobile interiors, and communication equipment casings, punching mesh holes is required to meet functional requirements such as aesthetics, weight reduction, heat dissipation, and installation;

[0003] In the prior art, multiple punching pins on the punching die for punching mesh holes are arranged in a rectangular array, and multiple rows of punching pins are neatly arranged side by side. The distance between the front and rear punching pins and between the left and right punching pins is too close, which will cause the yield strength of the sheet to increase during punching, greatly increasing the risk of material deformation, tearing or burr generation; and because there are too many and dense punching pins, in order to prevent the sheet from being quickly damaged by punching, generally at least three punching devices are required to punch the sheet in sections to complete the punching process of the sheet, which not only has a high cost, but also the multiple devices occupy too much area and take up a lot of space. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a punching die for punching mesh holes in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a punching die for punching mesh holes, including an upper die and a lower die, the upper die moves longitudinally close to or away from the lower die through a guide post. Among them, multiple groups of punching pin modules are arranged at intervals on the upper die and extend towards the lower die; a material placing position for placing a template is provided on the upper surface of the lower die, and a material pulling mechanism for driving the template to gradually move in the feeding direction; a product punching part is arranged in the middle of the template; a plurality of mesh dies corresponding to and cooperating with the multiple groups of punching pin modules to punch holes in the product punching part are arranged on the lower surface of the lower die at the product punching part; the punching pin module includes at least two rows of punching pins arranged front and back; the multiple punching pins in the front row and the multiple punching pins in the back row are staggered with each other; there is partial overlap between the previous punching range and the subsequent punching range, and the punching holes are staggered with each other; clamping tube position holes extending in the feeding direction of the template are symmetrically arranged on the relative two sides of the lower die at the product punching part; convex columns corresponding to and cooperating with the clamping tube position holes for sliding connection are respectively arranged on the relative two sides of the template.

[0006] In the punching die for punching mesh holes of the utility model, a plurality of positioning columns are sequentially arranged on both sides of the lower die at the material placing position along the feeding direction of the template; a plurality of first grooves corresponding to and avoiding the positioning columns are arranged on the upper die.

[0007] For the punching die with mesh holes of the present utility model, among the two opposite positioning columns, one of the positioning columns is fixedly connected to the lower die, and the other positioning column is movably connected to the lower die. The movable positioning column provides a force for the template to move towards the direction of the fixed positioning column through a spring until the template is tightly pressed and fixed on the fixed positioning column;

[0008] For the punching die with mesh holes of the present utility model, the distance that the template moves each time is greater than the maximum diameter of the punching hole;

[0009] For the punching die with mesh holes of the present utility model, the material pulling mechanism includes one or more telescopic cylinders fixedly installed at one end of the lower die; the telescopic cylinders are located upstream or downstream of the template; a connecting block is fixedly installed on the output shaft of the telescopic cylinder; the connecting block is fixedly connected to one end of the template close to the telescopic cylinder through a fastener;

[0010] For the punching die with mesh holes of the present utility model, the upper die includes an upper die base, an upper backing plate, an upper clamping plate, and a stripper plate arranged in sequence from top to bottom; the upper die base, the upper backing plate, and the upper clamping plate are fixedly connected in sequence; the stripper plate is movably connected to the upper backing plate through an elastic member; a plurality of punching pins are fixedly installed on the upper clamping plate; avoidance holes for the punching pins to pass through are provided on the stripper plate;

[0011] For the punching die with mesh holes of the present utility model, the guide post is located between the two opposite positioning columns;

[0012] For the punching die with mesh holes of the present utility model, the guide post is fixedly installed on the upper clamping plate; a channel for the guide post to pass through is provided on the stripper plate; a positioning seat corresponding to the guide post is provided in the lower die; a second groove for the guide post to insert is provided on the positioning seat.

[0013] The beneficial effects of the present utility model are as follows: The punching die for net holes is ingeniously designed. When the upper die and the lower die are opened, the product punching part of the template is driven by the material pulling mechanism to move to the net die and then pauses. The upper die and the lower die are closed, and a plurality of punch needle modules are controlled to punch the product punching part for the first time. Then, the upper die and the lower die are opened, and the upper die controls the plurality of punch needle modules to move away from the template. At this time, the material pulling mechanism drives the sample to continue moving a certain distance in the feeding direction and then pauses. The upper die and the lower die are closed, and the plurality of punch needle modules are controlled to punch the product punching part for the second time. Since the punch needle module includes at least two rows of punch needles arranged front and back; a plurality of punch needles in the front row and a plurality of punch needles in the back row are staggered with each other; the punching range of the previous time and the punching range of the next time have partial overlap, and the punched holes are staggered with each other, ensuring that each punching does not overlap; after repeating the above punching actions multiple times, uniformly distributed net holes are gradually formed on the template. There is no need for multiple punching dies to punch holes in sections, with low cost. Moreover, when punching each time, the fact that a plurality of punch needles in the front row and a plurality of punch needles in the back row are staggered with each other can not only better evenly distribute the stress generated during punching, greatly reducing the risk of deformation and cracking of the template; but also make the positions of the holes more accurate and the hole diameters more consistent, improving the overall quality of the punched hole net. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will further illustrate the present utility model in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings:

[0015] Figure 1 is a top view of the lower die of a preferred embodiment of the present utility model;

[0016] Figure 2 is a state diagram of the first punching of the template in a preferred embodiment of the present utility model;

[0017] Figure 3 is a state diagram of the second punching of the template in a preferred embodiment of the present utility model;

[0018] Figure 4 is a state diagram of the fifth punching of the template in a preferred embodiment of the present utility model;

[0019] Figure 5 is a structural schematic diagram of a punching die for net holes in a preferred embodiment of the present utility model Figure 1 (upper die and lower die in open state);

[0020] Figure 6 is a structural schematic diagram of a punching die for net holes in a preferred embodiment of the present utility model Figure 2 (upper die and lower die in closed state). DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In the specification, claims and drawings of the present invention, terms such as "first", "second", "third" and "fourth" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0022] Reference to "embodiments" herein means that a particular feature, structure or characteristic described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0023] "Plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0024] Moreover, terms indicating directions such as "up, down, front, back, left, right, upper end, lower end, longitudinal" etc. are all referenced based on the attitude position of the device or equipment described in this solution during normal use.

[0025] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] A punching die for mesh holes in a preferred embodiment of the present utility model, as Figures 1 - 6As shown, it includes an upper die 10 and a lower die 20. The upper die 10 moves longitudinally closer to or away from the lower die 20 through a guide post 11. Among them, multiple groups of punch needle modules 12 are arranged at intervals on the upper die 10 and extend towards the lower die 20; on the upper surface of the lower die 20, there is a blanking position for placing a template 21, and a material pulling mechanism 30 for driving the template 21 to gradually move in the feeding direction; in the middle of the template 21, there is a product punching part 211; on the lower surface of the lower die 20 at the product punching part 211, there are multiple mesh dies (not shown in the figure) that correspond to and cooperate with the multiple groups of punch needle modules 12 to punch holes in the product punching part 211; in an embodiment, the punched holes are regular hexagons, and the structure is stable; as Figure 2 As shown, the punch needle module 12 includes at least two rows of punch needles 121 arranged front and back; the multiple punch needles 121 in the front row and the multiple punch needles 121 in the back row are staggered with each other; there is partial overlap between the punching ranges of the previous punching and the subsequent punching, and the punched holes are staggered with each other; not only can the stress generated during punching be better evenly distributed, which can greatly reduce the risk of deformation and rupture of the template, but also the position of the holes can be made more accurate and the hole diameters can be more consistent, improving the overall quality of the punched hole mesh.

[0027] Furthermore, as Figure 1 As shown, on both sides of the lower die 20 at the blanking position, a plurality of positioning posts 22 are sequentially arranged along the feeding direction of the template 21; in an embodiment, among the two relatively positioned positioning posts 22, one positioning post 22 is fixedly connected to the lower die 20, and the other positioning post 22 is movably connected to the lower die 20. The movable positioning post 22 provides a force for the template 21 to move towards the fixed positioning post 22 through a spring 221 until the template 21 is tightly pressed and fixed on the fixed positioning post 22; on the upper die 10, there are a plurality of first grooves (not shown in the figure) that correspond to and avoid the positioning posts 22, and the positioning is accurate.

[0028] Furthermore, on the lower die 20, on the opposite sides of the product punching part 211, there are symmetrically arranged card tube positioning holes 23 extending in the feeding direction of the template 21; on the opposite sides of the template 21, there are convex columns 212 that correspond to and are slidably connected with the card tube positioning holes 23 one by one; it can ensure that the template will not move left and right to both sides every time it moves.

[0029] Furthermore, the distance that the template 21 moves each time is greater than the maximum diameter of the punched hole; preferably, the distance between each movement of the sample is 3.2 mm, and the maximum diameter of the punched hole is 2.6 mm.

[0030] The punching die for mesh holes is ingeniously designed. When the upper die and the lower die are opened, the drawing mechanism drives the punching part of the sample to move to the mesh die and then pauses. The upper die and the lower die are closed, and multiple groups of punching needle modules are controlled to punch the punching part of the product for the first time. Then, the upper die and the lower die are opened, and the upper die controls multiple groups of punching needle modules to move away from the sample. At this time, the drawing mechanism drives the sample to continue moving a certain distance in the feeding direction and then pauses. The upper die and the lower die are closed, and multiple groups of punching needle modules are controlled to punch the punching part of the product for the second time. Since the punching needle module includes at least two rows of punching needles arranged front and back; multiple punching needles in the front row and multiple punching needles in the back row are staggered with each other; there is partial overlap between the punching ranges of the previous punching and the subsequent punching, and the punched holes are staggered with each other, ensuring that each punching does not overlap; repeating the above punching actions multiple times, after punching 5 more times successively, uniformly distributed mesh holes are gradually formed on the sample. There is no need for multiple punching dies to punch holes in sections, with low cost. Moreover, each time when punching, multiple punching needles in the front row and multiple punching needles in the back row being staggered with each other can not only better evenly distribute the stress generated during punching, greatly reducing the risk of deformation and rupture of the sample, but also make the positions of the holes more accurate and the hole diameters more consistent, improving the overall quality of the punched mesh.

[0031] Further, the drawing mechanism 30 includes one or more telescopic cylinders 31 fixedly installed at one end of the lower die 20; the telescopic cylinder 31 is located upstream or downstream of the sample 21; a connecting block 32 is fixedly installed on the output shaft of the telescopic cylinder 31; the connecting block 32 is fixedly connected to one end of the sample 21 close to the telescopic cylinder 31 through a fastener; the fastener is a fastening screw; the telescopic cylinder 31 is of step type, and the moving distance each time is the same, ensuring that the punched mesh holes are more uniform.

[0032] Further, the upper die 10 includes an upper die base 101, an upper backing plate 102, an upper clamping plate 103, and a stripper plate 104 arranged in sequence from top to bottom; the upper die base 101, the upper backing plate 102, and the upper clamping plate 103 are fixedly connected in sequence; the stripper plate 104 is movably connected to the upper backing plate 102 through an elastic member 105; multiple punching needles 121 are all fixedly installed on the upper clamping plate 103; the stripper plate 104 is provided with avoidance holes 106 for the punching needles 121 to pass through; the structure is stable.

[0033] Further, the guide posts 11 are located between two opposite positioning posts 22, ensuring that the punching position of the punching needles remains unchanged each time and the punching is precise.

[0034] Further, the guide posts 11 are fixedly installed on the upper clamping plate 103; the stripper plate 104 is provided with channels 107 for the guide posts 11 to pass through; a positioning seat 24 corresponding to the guide posts 11 is arranged in the lower die 20; a second groove (not shown in the figure) for the guide posts 11 to insert is arranged on the positioning seat 24.

[0035] It should be understood that those of ordinary skill in the art can make improvements or modifications based on the above description, and all such improvements and modifications shall fall within the protection scope of the appended claims of this utility model.

Claims

1. A punching die for mesh holes, comprising an upper die and a lower die, wherein the upper die moves longitudinally close to or away from the lower die through a guide post, and is characterized in that, On the upper die, there are multiple sets of punch pin modules arranged at intervals and extending towards the lower die; on the upper surface of the lower die, there is a feeding position for placing the template, and a material pulling mechanism for driving the template to gradually move in the feeding direction; in the middle of the template, there is a product punching part; on the lower surface of the lower die at the product punching part, there are multiple mesh dies corresponding to and cooperating with the multiple sets of punch pin modules to punch holes in the product punching part; the punch pin module includes at least two rows of punch pins arranged front and back; the multiple punch pins in the front row and the multiple punch pins in the back row are staggered with each other; the punching range of the previous punch and the punching range of the subsequent punch partially overlap, and the punched holes are staggered with each other; on the lower die at the relative two sides of the product punching part, there are symmetrically arranged card tube positioning holes extending in the feeding direction of the template; on the relative two sides of the template, there are respectively convex columns corresponding to and slidably connected with the card tube positioning holes.

2. The punching die according to claim 1, characterized in that, On the lower die, on both sides of the feeding position, there are multiple positioning columns arranged in sequence along the feeding direction of the template; on the upper die, there are multiple first grooves corresponding to and avoiding the positioning columns.

3. The punching die according to claim 2, characterized in that, Among the two opposite positioning columns, one positioning column is fixedly connected to the lower die, and the other positioning column is movably connected to the lower die. The movable positioning column provides a force for the template to move towards the fixed positioning column through a spring until the template is tightly pressed and fixed on the fixed positioning column.

4. The punching die according to any one of claims 1-3, characterized in that The distance that the template moves each time is greater than the maximum diameter of the punched hole.

5. The punching die according to claim 4, characterized in that, The material pulling mechanism includes one or more telescopic cylinders fixedly installed at one end of the lower die; the telescopic cylinder is located upstream or downstream of the template; a connecting block is fixedly installed on the output shaft of the telescopic cylinder; the connecting block is fixedly connected to one end of the template close to the telescopic cylinder through a fastener.

6. The punching die according to any one of claims 1-3 and 5, characterized in that, The upper die includes an upper die base, an upper backing plate, an upper clamping plate, and a stripper plate arranged in sequence from top to bottom; the upper die base, the upper backing plate, and the upper clamping plate are fixedly connected in sequence; the stripper plate is movably connected to the upper backing plate through an elastic member; multiple punch pins are fixedly installed on the upper clamping plate; the stripper plate is provided with avoidance holes for the punch pins to pass through.

7. The punching die according to claim 2, wherein, The guiding column is located between the two opposite positioning columns.

8. The punching die according to claim 6, characterized in that, The guiding column is fixedly installed on the upper clamping plate; the stripper plate is provided with a channel for the guiding column to pass through; a positioning seat corresponding to the guiding column is arranged in the lower die; the positioning seat is provided with a second groove for the guiding column to be inserted into.

Images