A device for preventing material blocking in plate blanking

Abstract

This utility model proposes a sheet metal punching device to prevent material blockage. It includes a ejector hole in the die, the ejector hole being frustoconical in shape, with the upper diameter smaller than the lower diameter. A cleaning mechanism is provided at the bottom of the die, with one cleaning mechanism corresponding to each ejector hole. Each cleaning mechanism includes multiple cleaning brushes arranged around the ejector hole. A waste bin is located below the die, connected to a collection box via a material pipe. The collection box is connected to a negative pressure fan, and a filter screen is provided at the connection between the negative pressure fan and the collection box. The ejector hole of this utility model prevents the ejected waste from easily contacting the inner wall of the ejector hole, reducing the possibility of blockage. Simultaneously, this application includes a suction mechanism that uses airflow to clean the waste, further preventing waste from remaining in the hole. This application also includes a cleaning mechanism that follows the punch's movement to clean the punch, preventing waste from adhering to the punch and ensuring subsequent punching results.

Description

Technical Field

[0001] This utility model relates to the field of anti-clogging material technology for punching dies, specifically to a device for punching sheet metal with anti-clogging material. Background Technology

[0002] In the production of gratings, punching holes in the grating material is a crucial step in processing sheet metal into gratings. During punching, the sheet metal is typically placed on a template with ejector holes. A punch corresponding to the ejector hole cuts through the sheet metal, removing the portion to be punched and ejecting the scrap material through the ejector hole. However, ejector holes are prone to clogging during punching. For example, some materials (low-carbon steel, aluminum alloys, etc.) have high ductility, and the material undergoes significant plastic deformation under the pressure of the punch during punching. Some material may be "pulled" into the ejector hole, becoming stuck on the hole wall and accumulating inside, causing blockage. Similarly, for low-hardness materials like plastics and rubber, the friction from the punch during punching generates debris. This debris is highly adhesive and can adhere to the hole or the punch, also clogging the ejector hole. Scrap material adhering to the punch will affect subsequent punching results. Utility Model Content

[0003] To address the problems in the background art, prevent clogging of the ejector hole, and prevent waste material from adhering to the punch, this utility model proposes an anti-clogging sheet metal punching device, including an ejector hole set in a template. The ejector hole is frustum-shaped, with the upper diameter of the ejector hole being smaller than its lower diameter. A cleaning mechanism is provided at the bottom of the template, with a corresponding cleaning mechanism at each ejector hole. The cleaning mechanism includes multiple cleaning brushes arranged around the ejector hole. A waste bin is provided below the template, and the waste bin is connected to a collection box via a material pipe. The collection box is connected to a negative pressure fan, and a filter screen is provided at the connection between the negative pressure fan and the collection box.

[0004] Preferably, the cleaning mechanism further includes two symmetrically arranged scrapers, with one end of the two scrapers facing away from each other being hinged to the template. A semi-circular opening is provided on the side of the two scrapers that are close to each other. A plurality of cleaning brushes are arranged circumferentially along the semi-circular opening of the scrapers. One end of the cleaning brush is fixedly connected to the scraper, and the other end of the cleaning brush extends radially away from the scraper along the semi-circular opening.

[0005] Preferably, the scraper is hinged to the flange plate, and the flange plate is bolted to the template.

[0006] Preferably, the scraper is hinged to the flange plate via a spring hinge.

[0007] Preferably, one end of the plurality of cleaning brushes near the scraper is fixed to an arc-shaped belt, and the arc-shaped belt is fixedly connected to the scraper.

[0008] Preferably, a sealing strip is provided between the top of the waste bin and the template.

[0009] Preferably, the negative pressure fan is connected to the collection box via a duct, with the end of the duct away from the negative pressure fan located at the top of the collection box, and the filter screen located inside the collection box and between the material pipe and the duct.

[0010] Preferably, one end of the material pipe is located at the upper part of one side of the collection box, and the other end of the material pipe is located at the bottom of one side of the waste box.

[0011] The beneficial effects of this utility model are as follows:

[0012] The ejector hole of this invention is a frustum-shaped cone, smaller at the top and larger at the bottom. This design prevents the waste material being punched from easily contacting the inner wall of the ejector hole, thus reducing the likelihood of waste accumulating inside and significantly decreasing the possibility of blockage. Furthermore, this application includes a suction mechanism that provides airflow from the ejector hole into the waste bin, cleaning the waste material and further preventing waste from remaining in the hole. Additionally, this application includes a cleaning mechanism that follows the punch's movement to clean the punch, preventing waste from adhering to it and ensuring optimal subsequent punching results. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0015] Figure 3 This is a schematic diagram of the cleaning mechanism of this utility model with the scraper in the closed state;

[0016] Figure 4 This is a schematic diagram of the filter cartridge structure with the scraper of the cleaning mechanism of this utility model in the open state.

[0017] Labels in the diagram: 1. Punch; 2. Template; 3. Unloading hole; 4. Sealing strip; 5. Scrap bin; 6. Material pipe; 7. Collection box; 8. Filter screen; 9. Air duct; 10. Negative pressure fan; 11. Flange plate; 12. Spring hinge; 13. Scraper; 14. Cleaning brush; 15. Curved belt. Detailed Implementation

[0018] To make this utility model clearer and more understandable, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the given embodiments are only one of the implementation methods and do not represent all embodiments.

[0019] In this article, terms such as "inner," "outer," "upper," and "lower" are established based on the positional relationships shown in the attached drawings. Depending on the attached drawings, the corresponding positional relationships may also change. Therefore, they should not be interpreted as an absolute limitation on the scope of protection.

[0020] Example 1:

[0021] Combined with appendix Figure 1 The anti-clogging plate punching device provided in this embodiment includes a material ejection hole 3 set in the template 2. The material ejection hole 3 is frustum-shaped, and the upper diameter of the material ejection hole 3 is smaller than its lower diameter. A cleaning mechanism is provided at the bottom of the template 2. Each material ejection hole 3 is provided with a corresponding cleaning mechanism. The cleaning mechanism includes multiple cleaning brushes 14, which are arranged around the material ejection hole 3. A waste bin 5 is provided below the template 2. The waste bin 5 is connected to a collection bin 7 through a material pipe 6. The collection bin 7 is connected to a negative pressure fan 10. A filter screen 8 is provided at the connection between the negative pressure fan 10 and the collection bin 7.

[0022] Because the lower diameter of the ejector hole 3 is large, when the punch 1 pushes the blank material into the ejector hole 3, the blank material cannot come into contact with the inner wall of the ejector hole 3, thus preventing the blank material from adhering to or getting stuck in the hole and preventing the ejector hole 3 from becoming clogged. Furthermore, during the punching process, the cleaning brush 14 removes any blank material adhering to the punch 1. The blanked material falls into the waste bin 5 for temporary storage, preventing the waste material from scattering in the workshop and other working environments, thus ensuring a clean environment.

[0023] When the negative pressure fan 10 is started, it can draw in air and provide airflow from the discharge hole 3 to the waste bin 5, which will carry the waste in the discharge hole 3 into the waste bin 5, clean the discharge hole 3 and prevent blockage.

[0024] Specifically, a sealing strip 4 is provided between the top of the waste bin 5 and the template 2. The sealing strip 4 can prevent air from being drawn in from the gap between the waste bin 5 and the template 2 when the negative pressure fan 10 draws in air, so that air can mainly enter from the discharge hole 3, thereby improving the air flow intensity of the discharge hole 3 and thus improving the cleaning effect.

[0025] Specifically, the negative pressure fan 10 is connected to the collection box 7 via a duct 9. The end of the duct 9 furthest from the negative pressure fan 10 is located at the top of the collection box 7. The filter screen 8 is located inside the collection box 7, between the feed pipe 6 and the duct 9. The filter screen 8 prevents waste from entering the negative pressure fan 10. The duct 9 is located at the top of the collection box 7, allowing the adsorbed waste to fall more effectively to the bottom of the collection box 7 after the negative pressure fan 10 stops working. It also prevents waste accumulation from covering the opening of the duct 9 and affecting the working effect of the negative pressure fan 10.

[0026] More specifically, one end of the material pipe 6 is located at the upper part of the side of the collection box 7, and the other end of the material pipe 6 is located at the bottom of the side of the waste box 5.

[0027] Example 2:

[0028] Combined with appendix Figure 1 -Appendix Figure 4 The anti-clogging material blanking device provided in this example has the same basic structural properties as the anti-clogging material blanking device described in Example 1. The difference is that the cleaning mechanism in this example also includes two symmetrically arranged scrapers 13. The opposite ends of the two scrapers 13 are respectively hinged to the template 2. A semi-circular opening is provided on the side of the two scrapers 13 that are close to each other. A plurality of cleaning brushes 14 are arranged circumferentially along the semi-circular opening of the scraper 13. One end of the cleaning brush 14 is fixedly connected to the scraper 13, and the other end of the cleaning brush 14 extends radially away from the scraper 13 along the semi-circular opening. Specifically, the scraper 13 is hinged to the flange plate 11, and the flange plate 11 is bolted to the template 2. More specifically, the scraper 13 is hinged to the flange plate 11 through a spring hinge 12. When the two scrapers 13 are closed, the two semi-circular openings can be joined to form a circular opening. The diameter of the circular opening is smaller than the diameter of the lower end of the discharge hole 3, and slightly smaller than or equal to the diameter of the punch 1. This allows the punch 1 to fall and push the two scrapers 13 to open, ensuring that the brush can fully contact the punch 1. The scrapers 13 enhance the contact strength between the cleaning brush 14 and the punch 1, improving the cleaning effect. Furthermore, when the scrapers 13 are open, the waste material on the scrapers 13 or cleaning brush 14 can fall under gravity, which to some extent avoids the possibility of material remaining on the cleaning brush 14, ensuring the cleaning effect. The scrapers 13 are hinged by spring hinges 12, allowing them to automatically return to their closed position. As the punch 1 moves up and down, the cleaning brush 14 remains in contact with the punch 1.

[0029] Specifically, one end of each of the cleaning brushes 14 near the scraper 13 is fixed to an arc-shaped belt 15, which is fixedly connected to the scraper 13. The arc-shaped belt 15 is bonded or heat-sealed to the scraper 13, and the cleaning brushes 14 are bonded or heat-sealed to the arc-shaped belt 15. The arc-shaped belt 15 improves the overall integrity of the multiple cleaning brushes 14 and enhances the fixation effect of the cleaning brushes 14 on the scraper 13.

[0030] Although embodiments of the present invention have been shown and described, those skilled in the art will be able to make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sheet metal punching device for preventing material blockage, comprising a material ejection hole (3) disposed on a template (2), characterized in that: The ejection hole (3) is frustum shaped, and the upper diameter of the ejection hole (3) is smaller than the lower diameter. The bottom of the template (2) is provided with a cleaning mechanism. Each ejection hole (3) is provided with a corresponding cleaning mechanism. The cleaning mechanism includes multiple cleaning brushes (14). The multiple cleaning brushes (14) are arranged on the periphery of the ejection hole (3). The template (2) is provided with a waste box (5). The waste box (5) is connected to a collection box (7) through a material pipe (6). The collection box (7) is connected to a negative pressure fan (10). A filter screen (8) is provided at the connection between the negative pressure fan (10) and the collection box (7).

2. The anti-clogging sheet metal punching device according to claim 1, characterized in that: The cleaning mechanism also includes two symmetrically arranged scrapers (13). The opposite ends of the two scrapers (13) are respectively hinged to the template (2). The two scrapers (13) are provided with a semi-circular opening on the side that is close to each other. A plurality of cleaning brushes (14) are arranged circumferentially along the semi-circular opening of the scraper (13). One end of the cleaning brush (14) is fixedly connected to the scraper (13), and the other end of the cleaning brush (14) extends radially away from the scraper (13) along the semi-circular opening.

3. The anti-clogging sheet metal punching device according to claim 2, characterized in that: The scraper (13) is hinged to the flange plate (11), and the flange plate (11) is bolted to the template (2).

4. The anti-clogging sheet metal punching device according to claim 3, characterized in that: The scraper (13) is hinged to the flange (11) via a spring hinge (12).

5. The anti-clogging sheet metal punching device according to claim 2, characterized in that: One end of each of the cleaning brushes (14) near the scraper (13) is fixed to an arc-shaped belt (15), which is fixedly connected to the scraper (13).

6. The anti-clogging sheet metal punching device according to claim 1, characterized in that: A sealing strip (4) is provided between the top of the waste bin (5) and the template (2).

7. The sheet metal punching device for preventing material blockage according to claim 1, characterized in that: The negative pressure fan (10) is connected to the collection box (7) through the air duct (9). The end of the air duct (9) away from the negative pressure fan (10) is located at the top of the collection box (7). The filter screen (8) is located inside the collection box (7) and between the material pipe (6) and the air duct (9).

8. The sheet metal punching device for preventing material blockage according to claim 7, characterized in that: One end of the material pipe (6) is located at the upper part of the side of the collection box (7), and the other end of the material pipe (6) is located at the bottom of the side of the waste box (5).

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