Iron gauze bending equipment

Abstract

The utility model relates to iron gauze bending equipment which comprises a reset support, an upper die installed above the reset support and a lower die installed below the reset support, through the well-designed reset support, assemblies in the lower die can be pressed downwards and reset in order, and the stability of the dies is improved; and through reasonable arrangement of the lower die structure, the iron wire net can be pre-compressed in the normal direction of a set of iron wires, the stress of the bent iron wire net can be effectively reduced, the die pressure maintaining time is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of stationery production, in particular to a wire mesh bending device. Background Art

[0002] In the stationery industry, wire mesh, as a common material, is widely used in the production of various stationery products. During the production process of wire mesh, the steel wire needs to be precisely bent and formed to meet the requirements of different shapes and sizes. Traditional wire mesh bending devices usually adopt manual operation or simple mechanical devices for bending, which have problems such as cumbersome operation, low efficiency, and low precision. For the step of bending wire mesh, it is crucial for the subsequent production of stationery. The goal of bending and forming is to ensure that the wire mesh does not rebound and has a good forming effect for subsequent stationery production. Most of the existing wire mesh bending and forming devices form the wire mesh in one go. Due to the 90° angle between the wires of the wire mesh, it is difficult to eliminate the stress after bending. Summary of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] The purpose of the utility model is to provide a wire mesh bending device to solve the problems existing in the prior art. Through a carefully designed reset bracket, the components in the lower die can be pressed down and reset in an orderly manner, improving the stability of the die; and through a reasonable setting of the lower die structure, the wire mesh can be pre-compressed along the normal direction of a group of wires, effectively reducing the stress of the wire mesh after bending, reducing the holding time of the die, and improving production efficiency.

[0005] (2) Technical Solutions

[0006] To achieve the above purpose, the utility model provides the following technical solutions: A wire mesh bending device, characterized in that it includes a reset bracket, a lower die fixed below the reset bracket, and an upper die fixed above the reset bracket;

[0007] The reset bracket includes a lower die positioning plate, support columns fixed at the four corners of the lower die positioning plate, a first reset spring installed between the lower die positioning plate and the support columns, a first fastening nut threadedly fastened to the upper end of the support column, a second fastening nut threadedly connected below the lower die positioning plate, a connecting plate fixed below the second fastening nut, and a third fastening nut threadedly connected below the connecting plate.

[0008] Preferably, the lower die includes a forming die installed on the lower die positioning plate, a pre-pressing block installed in the forming die, an electromagnetic pull rod installed at the center of the forming die, a second reset spring fixed between the electromagnetic pull rod and the forming die, an adjusting nut threadedly connected to the bottom of the electromagnetic pull rod, and a third reset spring installed between the adjusting nut and the connecting plate.

[0009] Preferably, the upper die includes an upper die positioning plate installed above the support column and an extrusion block fixed within the upper die positioning plate.

[0010] Preferably, there are four preloading block grooves for installing preloading blocks in the forming die. Three positioning columns are provided within the preloading block grooves, and a fourth return spring is fixed outside the positioning columns.

[0011] Preferably, there are three counterbores corresponding to the positioning columns on the back surface of the preloading block.

[0012] Preferably, the extrusion block is a semi-cylindrical body.

[0013] Preferably, there is an electromagnet groove inside the forming die. The diameter of the electromagnet groove is 0.5 mm larger than the diameter of the electromagnet at the upper end of the electromagnetic pull rod. The pull rod hole and the pull rod below the electromagnet are in clearance fit.

[0014] (III) Beneficial effects

[0015] The present utility model aims to provide a wire mesh bending device. This device adopts the collaborative work of multiple components such as a return bracket, an upper die, and a lower die, making the entire forming process more efficient. Through this wire mesh bending device, pre-compression of the wire mesh can be achieved, reducing the stress after forming, improving production efficiency, and reducing usage costs. Description of the drawings

[0016] Figure 1 It is a schematic diagram of the whole of the present utility model.

[0017] Figure 2 It is a schematic diagram of the return bracket in the present utility model.

[0018] Figure 3 It is a schematic diagram of the lower die in the present utility model.

[0019] Figure 4 It is a schematic diagram of the installation method of the preloading block in the present utility model.

[0020] Figure 5 It is a schematic diagram of the bottom of the preloading block in the present utility model.

[0021] Figure 6 It is a schematic diagram of the upper die in the present utility model.

[0022] Figure 7 It is a schematic diagram of the forming die in the present utility model.

[0023] Figure 8 It is a schematic diagram of the electromagnetic pull rod in the present utility model.

[0024] In the figure: 1 - reset bracket; 101 - lower die positioning plate; 102 - first reset spring; 103 - support column; 104 - first fastening nut; 105 - connecting plate; 106 - third fastening nut; 107 - second fastening nut; 2 - lower die; 201 - forming die; 2011 - electromagnet groove; 2012 - pull rod hole; 202 - preloading block; 2021 - counterbore; 203 - electromagnetic pull rod; 2031 - electromagnet; 2032 - pull rod; 204 - second reset spring; 205 - third reset spring; 206 - adjusting nut; 207 - positioning column; 208 - fourth reset spring; 209 - preloading block groove; 3 - upper die; 301 - upper die positioning plate; 302 - extrusion block Detailed implementation manner

[0025] The following will combine the attached drawings in the embodiments of the present utility model Figure 1-8 The technical solutions in the embodiments of the present utility model will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] The present utility model provides a technical solution: a wire mesh bending device, which is characterized in that it includes a reset bracket 1, a lower die 2 fixed below the reset bracket 1, and an upper die 3 fixed above the reset bracket 1;

[0027] The reset bracket 1 includes a lower die positioning plate 101, support columns 103 fixed at the four corners of the lower die positioning plate 101, a first reset spring 102 installed between the lower die positioning plate 101 and the support columns 103, a first fastening nut 104 threadedly fastened to the upper end of the support column 103, a second fastening nut 107 threadedly connected below the lower die positioning plate 101, a connecting plate 105 fixed below the second fastening nut 107, and a third fastening nut 106 threadedly connected below the connecting plate 105. The lower die positioning plate 101 is used to fix the forming die and facilitate installation on the fixture. The four support columns 103 are arranged at the four corners of the equipment, and each support column 103 is fixed to the lower die mounting plate 101 by the first reset spring 102 and the second fastening nut 107. Such a setting has the following functions: improving the stability and smoothness of the upper die 3 during up and down movement, ensuring the stability of the upper die 3 at the starting point, and providing sufficient support for the upper die 3. The connecting plate 105 is connected to the lower part of the support column by the second fastening nut 107 and the third fastening nut 106. Such a setting helps to reduce the impact on the connecting plate 105 during equipment reset. And due to long-term rebound, the first reset spring 102 will fatigue. The tightness of the first reset spring 102 can be adjusted by rotating the second fastening nut 107 to achieve a satisfactory rebound speed and position. The first fastening nut 104 is used to fix the upper die positioning plate 301 on the support column 103.

[0028] The lower die includes a forming die 201 installed on the lower die positioning plate 101, a pre-pressing block 202 installed inside the forming die 201, an electromagnetic pull rod 203 installed at the center of the forming die 201, a second return spring 204 fixed between the electromagnetic pull rod 203 and the forming die 201, an adjusting nut 206 threadedly connected to the bottom of the electromagnetic pull rod 203, and a third return spring 205 installed between the adjusting nut 206 and the connecting plate 105. The forming die 201 is fixed inside the lower die fixing plate 101, the pre-pressing block 202 is installed inside the forming die 201, the electromagnetic pull rod 203 is installed at the center of the forming die 201, and when the pre-pressing block 202 and the electromagnetic pull rod 203 are pressed down, their shapes fit with the forming die 201 to form a semi-cylinder. Such a setting has the following functions: when the electromagnetic pull rod 203 moves downward, it will attract the center of the wire mesh to move downward. Because of the action of the fourth return spring 208 under the pre-pressing block 202, the pre-pressing block will not move downward, realizing the pre-pressing of the wire mesh along the normal direction of a group of wires, reducing the stress of the wire mesh after final forming, and ensuring that the wire mesh is semi-circular after final forming. The second return spring 204 is used to reset the electromagnetic pull rod 203. The k value of the third return spring 205 is three times that of the second return spring 204, and it is used to transfer the force of the support rod 103 to the electromagnetic pull rod 203 to press it down. Under the action of the two return springs, the reliable and stable rebound of the electromagnetic pull rod 203 can be ensured. The adjusting nut 206 is used to adjust the softness and hardness of the third return spring 205 to ensure that it will not be impacted during the process of pressing down the electromagnetic pull rod 203, and to ensure that the electromagnet 2031 has a long service life and reliable magnetic force.

[0029] The upper die includes an upper die positioning plate 301 installed above the support column 103 and an extrusion block 302 fixed inside the upper die positioning plate 301. The upper die positioning plate 301 is used to install the extrusion block 302 on the support column 103. Such a split setting facilitates the replacement of the extrusion block 302 and reduces the use cost of the equipment.

[0030] There are four pre-pressing block grooves 209 for installing the pre-pressing block 202 inside the forming die 201. Three positioning columns 207 are arranged in the pre-pressing block grooves 209, and a fourth return spring 208 is fixed outside the positioning columns 207. The grooves inside the forming die 201 are used to accommodate the pre-pressing block 202 to ensure that when the pre-pressing block 202 is pressed down, its outer side fits with the arc of the forming die 201, ensuring the forming quality of the wire mesh. The positioning columns 207 are used to ensure the directional movement of the fourth return spring 208 and ensure the stability and reliability of its rebound.

[0031] There are three counterbores 2021 corresponding to the positioning columns 207 on the back of the pre-pressing block 202. The counterbores 2021 are used to accommodate the positioning columns 207 and the fourth return spring 208.

[0032] The extrusion block 302 is a semi-cylindrical body, which can completely fit the shape of the forming die 201, and ensure that it can still work when the support column 103 undergoes small deformation, ensuring the stable and reliable operation of the equipment during production and its long service life.

[0033] There is an electromagnet groove 2011 inside the forming die 201. There is a pull rod hole 2012 in the electromagnet groove 2011. The diameter of the electromagnet groove 2011 is 0.5 mm larger than the diameter of the electromagnet 2031 at the upper end of the electromagnetic pull rod 203. The pull rod hole 20120 and the pull rod 2032 below the electromagnet 2031 are in clearance fit. The groove in the center of the forming die 201 is used to accommodate the electromagnet 2031, ensuring that the outer surface of the electromagnet 2031 fits the shape of the forming die 201 after the electromagnetic pull rod 203 is pressed down, and ensuring the forming quality of the wire mesh. The hole in the forming die groove is used to pass the pull rod 2032, ensuring that the pressing force can be transmitted to the electromagnet 2031. By lengthening the electromagnetic pull rod 203 and connecting it to the support column 103 through the connecting plate 105, it is linked with the upper die 3, reducing the number of hydraulic cylinders used and lowering the operating cost of the equipment.

[0034] Working principle:

[0035] During the working process, first fix the lower die fixing plate 101 to the lower part of the hydraulic press with a fixture. The pressure of the hydraulic press acts on the upper die fixing plate 301. Place the wire mesh above the electromagnetic pull rod 203, start the hydraulic press, and push the upper die 3 downward. The upper die 3 will push the connecting plate 105 downward through the support column 103, squeezing the third return spring 205. Through the third return spring 205, the electromagnetic pull rod 203 is pushed downward. The electromagnet 2031 above the electromagnetic pull rod 203 attracts the center of the upper wire mesh downward. Due to the action of the fourth return spring 208, the pre-pressing block 202 will push up the four corners of the wire mesh for pre-pressing, and the pre-pressing direction is along the normal of the wire of the wire mesh, only receiving the force of the wire mesh in a single direction. As the hydraulic press works, when the electromagnet 2301 reaches the limit position, the extrusion block 302 starts to squeeze the pre-pressing block 202 and push the pre-pressing block 202 into the groove of the forming die 201. At this time, the pre-pressing block 202 and the outer surface of the electromagnet 203 form a semi-cylindrical space with the surface of the forming die 201, which exactly accommodates the extrusion block 302. At this time, the forming of the wire mesh is completed. During the process of the hydraulic press returning to the initial position, the first return spring jacks up the support column 103 and at the same time resets the electromagnetic pull rod 203, and the fourth return spring 208 jacks up the pre-pressing block 202 to demold the wire mesh.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wire mesh bending device, characterized in that: It comprises a reset bracket (1), a lower die (2) fixed below the reset bracket (1), and an upper die (3) fixed above the reset bracket (1); The reset bracket (1) comprises a lower die positioning plate (101), support columns (103) fixed at four corners of the lower die positioning plate (101), a first reset spring (102) installed between the lower die positioning plate (101) and the support column (103), a first fastening nut (104) threadedly fastened to the upper end of the support column (103), a second fastening nut (107) threadedly connected to the bottom of the lower die positioning plate (101), a connecting plate (105) fixed below the second fastening nut (107), and a third fastening nut (106) threadedly connected to the bottom of the connecting plate (105).

2. A wire mesh bending device according to claim 1, characterized in that: The lower mold (2) comprises a molding mold (201) installed on a lower mold positioning plate (101), a pre-pressing block (202) installed in the molding mold (201), an electromagnetic pull rod (203) installed at the center of the molding mold (201), a second return spring (204) fixed between the electromagnetic pull rod (203) and the molding mold (201), an adjustment nut (206) threadedly connected to the bottom of the electromagnetic pull rod (203), and a third return spring (205) installed between the adjustment nut (206) and the connecting plate (105).

3. The wire mesh bending device according to claim 1, characterized in that: The upper die (3) comprises an upper die positioning plate (301) installed above the support column (103) and an extrusion block (302) fixed in the upper die positioning plate (301).

4. The wire mesh bending device according to claim 2, characterized in that: The molding die (201) has four pre-pressing block grooves (209) for installing pre-pressing blocks (202), three positioning columns (207) are arranged in the pre-pressing block grooves (209), and a fourth return spring (208) is fixed outside the positioning columns (207).

5. The wire mesh bending device according to claim 2, characterized in that: The back side of the pre-pressing block (202) is provided with three countersunk holes (2021) corresponding to the positioning columns (207).

6. The wire mesh bending device according to claim 3, characterized in that: The extrusion block (302) is a semi-cylinder.

7. The wire mesh bending device according to claim 2, characterized in that: The molding die (201) has an electromagnet slot (2011) inside, and a pull rod hole (2012) inside the electromagnet slot (2011). The diameter of the electromagnet slot (2011) is 0.5 mm larger than the diameter of the electromagnet (2031) at the upper end of the electromagnetic pull rod (203). The pull rod hole (2012) and the pull rod (2032) below the electromagnet (2031) are clearance-matched.

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