Civil defense net bending device and method for bending civil defense net using the device

Abstract

The present invention belongs to the technical field of bending devices and bending methods, and discloses a bending device for civil air defense nets and a method for bending civil air defense nets using the device. Its main technical features are: comprising a frame with a net feeding mechanism, a longitudinal rib bending mechanism is arranged on the frame, a transverse rib bending frame is arranged in front of the longitudinal rib bending mechanism, and transverse rib bending mechanisms are arranged at both ends of the transverse rib bending frame. The longitudinal ribs in front of the mesh are first bent by the longitudinal rib bending mechanism, and the mesh is fed by the net feeding mechanism. While feeding the mesh, the transverse ribs on both sides are bent by the transverse rib bending mechanism, and finally the longitudinal ribs at the rear of the mesh are bent by the longitudinal rib bending mechanism. The bending quality is good, the bending efficiency is high, the labor intensity is low, and the mesh flatness is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of bending devices and civil air defense net bending methods, and in particular relates to a civil air defense net bending device and a method for bending a civil air defense net using the device. Background Art

[0002] The civil air defense net is welded with steel bars with larger diameters. In order to increase the strength of the ends, the four sides of the civil air defense net are bent to one side. At present, the civil air defense net is welded by a welding machine. After welding, the mesh is fixed on the operating table, and the ends of the steel bars are bent manually. The above method has the following defects: First, due to the large diameter, manual bending has high labor intensity and low labor efficiency; second, when bending, due to different bending positions, the side of the civil air defense net is uneven, affecting the use of the civil air defense net; third, the bending angles at the ends of the steel bars are different, which can easily cause the steel bars on the mesh surface to bend during bending, resulting in poor flatness of the mesh. Summary of the invention

[0003] The first technical problem to be solved by the present invention is to provide a civil defense net bending device with high labor efficiency, low labor intensity, accurate bending position, precise bending angle, and good mesh flatness.

[0004] In order to solve the above problems, the technical solution adopted by the bending device of the civil defense net of the present invention is: it includes a frame with a net feeding mechanism, a longitudinal rib bending mechanism is arranged on the frame, a transverse rib bending frame is arranged in front of the longitudinal rib bending mechanism, and transverse rib bending mechanisms are arranged at both ends of the transverse rib bending frame; the longitudinal rib bending mechanism includes a longitudinal rib bending lower part and a longitudinal rib bending upper part, the longitudinal rib bending lower part includes a front support plate and a rear support plate fixed to the frame, a lower mold groove is formed between the front support plate and the rear support plate, a lower mold bracket is arranged in the lower mold groove, a longitudinal rib lower mold is fixed above the lower mold bracket, and the lower part of the lower mold bracket is connected to the frame through a lower mold lifting mechanism; the longitudinal rib bending upper part includes a front pressure plate and a rear pressure plate fixed to the frame, An upper fixed plate groove is formed between the front pressure plate and the rear pressure plate, and an upper fixed plate is arranged in the upper fixed plate groove, and the upper part of the upper fixed plate is fixed to the upper beam, and the upper beam is fixed to the upper beam lifting mechanism, and a front bending upper die and a rear bending upper die are respectively arranged on the front pressure plate and the rear pressure plate, and the front bending upper die and the rear bending upper die are respectively connected to the front bending cylinder and the rear bending cylinder; the transverse rib bending mechanism includes a transverse rib bending frame, a transverse rib lower die is arranged near the bottom of the transverse rib bending frame, and a pressure block is arranged on the transverse rib bending frame above the transverse rib lower die, and the pressure block is fixed to the push rod of the pressure block cylinder fixed on the transverse rib bending frame, and a transverse rib upper die is arranged obliquely above the transverse rib lower die, and the transverse rib upper die is connected to the push rod of the upper die cylinder fixed on the transverse rib bending frame.

[0005] Its additional technical features are:

[0006] A front fixed shaft and a rear fixed shaft are respectively provided on the front pressing plate and the rear pressing plate, and the front bending upper die and the rear bending upper die are movably connected to the front pressing plate and the rear pressing plate through the front fixed shaft and the rear fixed shaft respectively;

[0007] The transverse rib upper die comprises a transverse rib upper die frame and a pressing wheel fixed on the transverse rib upper die frame.

[0008] The second technical problem to be solved by the present invention is to provide a method for bending a civil defense net using the device.

[0009] In order to solve the above problems, the technical solution adopted by the method of using the device to bend the civil air defense net of the present invention is: the method comprises the following steps:

[0010] The first step is to send the network

[0011] The welded mesh to be bent is sent forward by the mesh feeding mechanism, so that the position where the front end of the longitudinal reinforcement of the civil air defense mesh needs to be bent reaches the front of the lower die of the longitudinal reinforcement;

[0012] The second step is to bend the longitudinal reinforcement at the front end of the mesh.

[0013] In the first step, the lower die lifting mechanism drives the lower die of the longitudinal rib to move upward, so that the lower die of the longitudinal rib is against the bottom of the longitudinal rib that needs to be bent;

[0014] In the second step, the upper beam lifting mechanism drives the upper beam to press downward, so that the upper fixing plate is pressed on the longitudinal reinforcement to be bent, and the upper fixing plate and the lower mold of the longitudinal reinforcement clamp and fix the longitudinal reinforcement;

[0015] Step (3), the front bending cylinder drives the front bending upper die to press down, and the longitudinal ribs are bent along the front of the longitudinal rib lower die;

[0016] Fourth, the front bending cylinder drives the front bending upper die to move upward, and the upper beam lifting mechanism drives the upper beam to move upward, so that the upper fixing plate leaves the longitudinal reinforcement;

[0017] Step 3: Continue to send the network

[0018] The mesh feeding mechanism feeds the mesh forward so that both ends of the transverse reinforcement reach above the transverse reinforcement lower die of the transverse reinforcement bending mechanism;

[0019] The fourth step is to bend the transverse ribs on both sides of the mesh

[0020] In the first step, the push rod of the block pressing cylinder drives the block pressing downward, and the transverse ribs are pressed and fixed by the block pressing and the lower die of the transverse ribs;

[0021] In the second step, the upper die cylinder drives the upper die of the transverse rib to press downward, and the transverse rib is bent under the action of the upper die of the transverse rib and the lower die of the longitudinal rib;

[0022] Step (3), the upper die cylinder drives the upper die of the transverse rib to move upward, and the push rod of the block cylinder drives the block to move upward, and the block leaves the transverse rib;

[0023] Step (4), the mesh feeding mechanism continues to feed the mesh forward, and the two ends of the adjacent transverse ribs reach the top of the transverse rib lower die of the transverse rib bending mechanism, and steps (1) to (3) are repeated until the last transverse rib of the mesh is bent, and then the next step is entered;

[0024] Step 5: Continue to send the network

[0025] The mesh is sent forward by the mesh feeding mechanism so that the position where the rear end of the longitudinal reinforcement of the civil air defense mesh needs to be bent reaches the rear of the lower mold of the longitudinal reinforcement;

[0026] Step 6: Bend the longitudinal reinforcement at the rear end of the mesh

[0027] In the first step, the lower die lifting mechanism drives the lower die of the longitudinal rib to move upward, so that the lower die of the longitudinal rib is against the bottom of the longitudinal rib that needs to be bent;

[0028] In the second step, the upper beam lifting mechanism drives the upper beam to press downward, so that the upper fixing plate is pressed on the longitudinal reinforcement to be bent, and the upper fixing plate and the lower mold of the longitudinal reinforcement clamp and fix the longitudinal reinforcement;

[0029] Step (3), the rear bending cylinder drives the rear bending upper die to press down, and the longitudinal ribs are bent along the rear of the longitudinal rib lower die;

[0030] Fourth, the rear bending cylinder drives the rear bending upper die to move upward, and the upper beam lifting mechanism drives the upper beam to move upward, so that the upper fixing plate leaves the longitudinal reinforcement;

[0031] Step 7: Send out the mesh

[0032] The folded mesh is delivered through the mesh delivery mechanism.

[0033] Compared with the prior art, the civil defense net bending device provided by the present invention has the following advantages: first, since it includes a frame with a net feeding mechanism, a longitudinal rib bending mechanism is arranged on the frame, a transverse rib bending frame is arranged in front of the longitudinal rib bending mechanism, and transverse rib bending mechanisms are arranged opposite to each other at both ends of the transverse rib bending frame; the longitudinal rib bending mechanism includes a longitudinal rib bending lower part and a longitudinal rib bending upper part, the longitudinal rib bending lower part includes a front support plate and a rear support plate fixed to the frame, a lower mold groove is formed between the front support plate and the rear support plate, a support corresponding to the lower mold is arranged in the lower mold groove, and a support corresponding to the lower mold is arranged in the lower mold groove. A lower die for longitudinal ribs is fixed above the lower die bracket, and is connected to the frame body through a lower die lifting mechanism below the lower die bracket; the upper part of the longitudinal rib bending includes a front pressing plate and a rear pressing plate fixed to the frame body, an upper fixed plate groove is formed between the front pressing plate and the rear pressing plate, an upper fixed plate is arranged in the upper fixed plate groove, the upper part of the upper fixed plate is fixed to an upper beam, the upper beam is fixed to the upper beam lifting mechanism, a front bending upper die and a rear bending upper die are respectively arranged on the front pressing plate and the rear pressing plate, and the front bending upper die and the rear bending upper die are respectively connected to the front bending cylinder and the rear bending cylinder;The transverse reinforcement bending mechanism includes a transverse reinforcement bending frame, a transverse reinforcement lower die is arranged near the bottom of the transverse reinforcement bending frame, a pressure block is arranged on the transverse reinforcement bending frame above the transverse reinforcement lower die, the pressure block is fixed to the top rod of the pressure block cylinder fixed on the transverse reinforcement bending frame, a transverse reinforcement upper die is arranged obliquely above the transverse reinforcement lower die, the transverse reinforcement upper die is connected to the top rod of the upper die cylinder fixed on the transverse reinforcement bending frame, when the position where the front end of the longitudinal reinforcement of the civil air defense mesh needs to be bent reaches the front of the longitudinal reinforcement lower die, the lower die lifting mechanism drives the longitudinal reinforcement lower die to move up, so that the longitudinal reinforcement lower die is pressed against the bottom of the longitudinal reinforcement that needs to be bent, and the upper beam lifting mechanism drives the upper beam to press down, so that the upper fixed plate is pressed on the position where the bending is required. The upper fixed plate and the lower die of the longitudinal reinforcement clamp the longitudinal reinforcement. At this time, the front bending cylinder drives the front bending upper die to press down, and the longitudinal reinforcement bends along the front of the lower die of the longitudinal reinforcement. The bending is completed. After the front end of the civil air defense mesh is bent, the front bending cylinder drives the front bending upper die to move up, and the upper beam lifting mechanism drives the upper beam to move up, so that the upper fixed plate leaves the longitudinal reinforcement, and the net feeding mechanism sends the net forward. When the two ends of the transverse reinforcement reach above the lower die of the transverse reinforcement of the transverse reinforcement bending mechanism, the push rod of the block pressing cylinder drives the block pressing down, and the transverse reinforcement is pressed and fixed by the block and the lower die of the transverse reinforcement. At this time, the upper die cylinder drives the upper die of the transverse reinforcement to press down, and the transverse reinforcement is bent under the action of the upper die of the transverse reinforcement and the lower die of the longitudinal reinforcement. The upper die cylinder drives the upper die of the transverse reinforcement The upper beam lifting mechanism drives the upper beam downward to press the upper fixed plate on top of the longitudinal reinforcement that needs to be bent, and the upper fixed plate and the longitudinal reinforcement lower die clamp the longitudinal reinforcement. At this time, the rear bending cylinder drives the rear bending upper die to press downward, and the longitudinal reinforcement is bent along the rear of the longitudinal reinforcement lower die, and the bending is completed. After the rear end of the civil air defense mesh is bent, the rear bending cylinder drives the rear bending The upper bending die moves upward, and the upper beam lifting mechanism drives the upper beam to move upward, so that the upper fixed plate leaves the longitudinal ribs, and the mesh feeding mechanism sends out the mesh to complete the entire bending process, with low labor intensity, high production efficiency, accurate bending position, precise bending angle, and good mesh surface flatness; secondly, since the front pressing plate and the rear pressing plate are respectively provided with a front fixed shaft and a rear fixed shaft, the front bending upper die and the rear bending upper die are respectively movably connected to the front pressing plate and the rear pressing plate through the front fixed shaft and the rear fixed shaft, the bending power is small and the bending position is more accurate; thirdly, since the transverse rib upper die includes a transverse rib upper die frame and a pressing wheel fixed on the transverse rib upper die frame, the transverse rib bending resistance is small and the bending is more convenient. ; BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the bending device of the civil air defense net of the present invention;

[0035] Figure 2 for Figure 1 Front view of;

[0036] Figure 3 for Figure 2 AA section view;

[0037] Figure 4 It is a schematic diagram of the structure of the bending device of the air defense net observed from the rear side;

[0038] Figure 5 It is a structural schematic diagram of a transverse reinforcement bending frame with a transverse reinforcement bending mechanism;

[0039] Figure 6 It is a structural schematic diagram of the transverse reinforcement bending mechanism on the left;

[0040] Figure 7 It is a cross-sectional view of the transverse rib bending mechanism on the left. DETAILED DESCRIPTION

[0041] The structure and use principle of the civil air defense net bending device of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a schematic diagram of the structure of the civil air defense net bending device of the present invention comprises a frame 2 with a net feeding mechanism 1, a longitudinal reinforcement bending mechanism 3 is arranged on the frame 2, a transverse reinforcement bending frame 4 is arranged in front of the longitudinal reinforcement bending mechanism 3, and transverse reinforcement bending mechanisms 5 are arranged at both ends of the transverse reinforcement bending frame 4.

[0043] like Figure 3 and Figure 4 As shown, the longitudinal rib bending mechanism includes a longitudinal rib bending lower part 6 and a longitudinal rib bending upper part 7, the longitudinal rib bending lower part 6 includes a front support plate 61 and a rear support plate 62 fixed to the frame body 2, a lower die groove 63 is formed between the front support plate 61 and the rear support plate 62, a lower die bracket 64 is provided in the lower die groove 63, a longitudinal rib lower die 65 is fixed above the lower die bracket 64, and is connected to the frame body 2 through a lower die lifting mechanism 66 below the lower die bracket 64. The upper part 7 of the longitudinal rib bending includes a front pressure plate 71 and a rear pressure plate 72 fixed to the frame 2, an upper fixed plate groove 73 is formed between the front pressure plate 71 and the rear pressure plate 72, an upper fixed plate 74 is arranged in the upper fixed plate groove 73, the upper part of the upper fixed plate 74 is fixed to an upper beam 75, the upper beam 75 is fixed to an upper beam lifting mechanism 76, a front bending upper die 77 and a rear bending upper die 78 are arranged on the front pressure plate 71 and the rear pressure plate 72 respectively, and the front bending upper die 77 and the rear bending upper die 78 are connected to a front bending cylinder 79 and a rear bending cylinder 80 respectively.

[0044] like Figure 5 , Figure 6 and Figure 7 As shown, the transverse rib bending mechanism 5 includes a transverse rib bending frame 51, a transverse rib lower die 52 is arranged near the bottom of the transverse rib bending frame 51, a pressure block 53 is arranged on the transverse rib bending frame above the transverse rib lower die 52, the pressure block 53 is fixed to the push rod of the pressure block cylinder 54 fixed on the transverse rib bending frame 51, and a transverse rib upper die 55 is arranged obliquely above the transverse rib lower die 52, and the transverse rib upper die 55 is connected to the push rod of the upper die cylinder 56 fixed on the transverse rib bending frame 51.

[0045] The welded mesh to be bent is fed forward by the mesh feeding mechanism 1. When the position where the front end of the longitudinal reinforcement of the civil air defense mesh needs to be bent reaches the front of the longitudinal reinforcement lower mold 65, the lower mold lifting mechanism 66 drives the longitudinal reinforcement lower mold 65 to move upward, so that the longitudinal reinforcement lower mold 65 is against the bottom of the longitudinal reinforcement that needs to be bent. The upper beam lifting mechanism 76 drives the upper beam 75 to press down, so that the upper fixed plate 74 is pressed on top of the longitudinal reinforcement that needs to be bent. The upper fixed plate 74 and the longitudinal reinforcement lower mold 65 clamp the longitudinal reinforcement and fix it. At this time, the front bending cylinder 79 drives the front bending upper mold 77 to press down, and the longitudinal reinforcement is bent along the front of the longitudinal reinforcement lower mold 65, and the bending is completed. After the front end of the civil air defense mesh is bent, the front bending cylinder 79 drives the front bending upper mold 77 to move upward, and the upper beam lifting mechanism 76 drives the upper beam 75 to move upward, so that the upper fixed plate 74 leaves the longitudinal ribs, and the net feeding mechanism 1 sends the net forward. When the two ends of the transverse ribs reach above the transverse rib lower mold 52 of the transverse rib bending mechanism 5, the push rod of the block cylinder 54 drives the block 53 to be pressed downward, and the transverse ribs are pressed and fixed by the block 53 and the transverse rib lower mold 52. At this time, the upper mold cylinder 56 drives the transverse rib upper mold 55 to be pressed downward, and the transverse ribs are bent under the action of the transverse rib upper mold 55 and the longitudinal rib lower mold 52. The upper mold cylinder 56 drives the transverse rib upper mold 55 to move upward, and the push rod of the block cylinder 54 drives the block 53 to move upward, and the block 53 leaves the transverse ribs. The net feeding mechanism continues to feed the net forward, and the transverse rib bending mechanism 5 bends each transverse rib. When the position where the rear end of the longitudinal rib of the air defense mesh needs to be bent reaches the rear of the longitudinal rib lower die 65, the lower die lifting mechanism 66 drives the longitudinal rib lower die 65 to move upward, so that the longitudinal rib lower die 65 is against the bottom of the longitudinal rib that needs to be bent, and the upper beam lifting mechanism 76 drives the upper beam 75 to press down, so that the upper fixed plate 74 is pressed above the longitudinal rib that needs to be bent, and the upper fixed plate 74 and the longitudinal rib lower die 65 clamp and fix the longitudinal rib. At this time, the rear bending cylinder 80 drives the rear bending upper mold 78 to press down, and the longitudinal ribs are bent along the rear of the longitudinal rib lower mold 65, and the bending is completed. After the rear end of the civil air defense mesh is bent, the rear bending cylinder 80 drives the rear bending upper mold 78 to move upward, and the upper beam lifting mechanism 76 drives the upper beam 75 to move upward, so that the upper fixed plate leaves the longitudinal ribs, and the mesh feeding mechanism sends the mesh out, completing the entire bending process, with low labor intensity and high production efficiency, accurate bending position, precise bending angle, and good mesh surface flatness.

[0046] A front fixed shaft 711 and a rear fixed shaft 721 are respectively provided on the front pressure plate 71 and the rear pressure plate 72. The front bending upper mold 77 and the rear bending upper mold 78 are movably connected to the front pressure plate 71 and the rear pressure plate 72 through the front fixed shaft 711 and the rear fixed shaft 721 respectively. The bending force is small and the bending position is more accurate.

[0047] The transverse rib upper die 55 comprises a transverse rib upper die frame 551 and a pressing wheel 552 fixed on the transverse rib upper die frame. The bending resistance of the transverse rib is small and the bending is more convenient.

[0048] The transverse rib upper die 55 comprises a transverse rib upper die frame 551 and a pressing wheel 552 fixed on the transverse rib upper die frame 551. The bending resistance of the transverse rib is small, and the bending is more convenient.

[0049] The method comprises the following steps:

[0050] The first step is to send the network

[0051] The welded mesh to be bent is sent forward by the mesh feeding mechanism 1, so that the position where the front end of the longitudinal reinforcement of the civil air defense mesh needs to be bent reaches the front of the longitudinal reinforcement lower die 65;

[0052] The second step is to bend the longitudinal reinforcement at the front end of the mesh.

[0053] In the first step, the lower die lifting mechanism 66 drives the longitudinal rib lower die 62 to move upward, so that the longitudinal rib lower die 65 is against the bottom of the longitudinal rib that needs to be bent;

[0054] In the second step, the upper beam lifting mechanism 76 drives the upper beam 75 to press downward, so that the upper fixing plate 74 is pressed above the longitudinal reinforcement to be bent, and the upper fixing plate 74 and the longitudinal reinforcement lower mold 65 clamp and fix the longitudinal reinforcement;

[0055] Step (3), the front bending cylinder 79 drives the front bending upper die to press down, and the longitudinal ribs are bent along the front of the longitudinal rib lower die;

[0056] Fourth, the front bending cylinder drives the front bending upper die 77 to move upward, and the upper beam lifting mechanism 76 drives the upper beam 75 to move upward, so that the upper fixing plate 74 leaves the longitudinal ribs;

[0057] Step 3: Continue to send the network

[0058] The mesh feeding mechanism 1 feeds the mesh forward so that both ends of the transverse ribs reach above the transverse rib lower die 52 of the transverse rib bending mechanism 5;

[0059] The fourth step is to bend the transverse ribs on both sides of the mesh

[0060] In the first step, the push rod of the block pressing cylinder 54 drives the block pressing 53 to press downward, and the transverse ribs are pressed and fixed by the block pressing 53 and the transverse rib lower die 52;

[0061] In the second step, the upper die cylinder 53 drives the upper die 55 of the transverse rib to press downward, and the transverse rib is bent under the action of the upper die 55 of the transverse rib and the lower die 52 of the longitudinal rib;

[0062] In the third step, the upper die cylinder 56 drives the upper die 55 of the transverse rib to move upward, and the push rod of the block cylinder 54 drives the block 53 to move upward, and the block 53 leaves the transverse rib;

[0063] In step (4), the mesh feeding mechanism continues to feed the mesh forward, and the two ends of the adjacent transverse ribs reach the upper 52 squares of the transverse rib lower die of the transverse rib bending mechanism, and steps (1) to (3) are repeated until the last transverse rib of the mesh is bent, and then the next step is entered;

[0064] Step 5: Continue to send the network

[0065] The mesh is fed forward by the mesh feeding mechanism 1, so that the position where the rear end of the longitudinal reinforcement of the civil air defense mesh needs to be bent reaches the rear of the longitudinal reinforcement lower die 65;

[0066] Step 6: Bend the longitudinal reinforcement at the rear end of the mesh

[0067] In the first step, the lower die lifting mechanism 66 drives the longitudinal rib lower die 65 to move upward, so that the longitudinal rib lower die 65 is against the bottom of the longitudinal rib that needs to be bent;

[0068] In the second step, the upper beam lifting mechanism 76 drives the upper beam 75 to press downward, so that the upper fixing plate 74 is pressed above the longitudinal reinforcement to be bent, and the upper fixing plate 74 and the longitudinal reinforcement lower mold 65 clamp and fix the longitudinal reinforcement;

[0069] In the third step, the rear bending cylinder 80 drives the rear bending upper die 78 to press downward, and the longitudinal ribs are bent along the rear of the longitudinal rib lower die 65;

[0070] Fourth, the rear bending cylinder 80 drives the rear bending upper die 78 to move upward, and the upper beam lifting mechanism 76 drives the upper beam 75 to move upward, so that the upper fixing plate 74 leaves the longitudinal ribs;

[0071] Step 7: Send out the mesh

[0072] The folded mesh is delivered through the mesh delivery mechanism.

[0073] The protection scope of the civil defense net bending device and the method for bending the civil defense net using the device of the present invention is not limited to the above-mentioned embodiments. As long as the structure is the same or similar to the structure of the civil defense net bending device of the present invention, or the method for bending the civil defense net using the device is the same or similar to the present method, it falls within the protection scope of the present invention.

Claims

1. A civil air defense net bending device, comprising a frame with a net feeding mechanism, characterized in that: A longitudinal rib bending mechanism is arranged on the frame, a transverse rib bending frame is arranged in front of the longitudinal rib bending mechanism, and transverse rib bending mechanisms are arranged oppositely at both ends of the transverse rib bending frame; The longitudinal rib bending mechanism comprises a longitudinal rib bending lower part and a longitudinal rib bending upper part, the longitudinal rib bending lower part comprises a front supporting plate and a rear supporting plate fixed to the frame body, a lower die groove is formed between the front supporting plate and the rear supporting plate, a lower die bracket is provided in the lower die groove, a longitudinal rib lower die is fixed above the lower die bracket, and the lower part of the lower die bracket is connected to the frame body through a lower die lifting mechanism; the longitudinal rib bending upper part comprises a front pressing plate and a rear pressing plate fixed to the frame body, an upper fixed plate groove is formed between the front pressing plate and the rear pressing plate, an upper fixed plate is provided in the upper fixed plate groove, the upper part of the upper fixed plate is fixed to an upper beam, the upper beam is fixed to an upper beam lifting mechanism, a front bending upper die and a rear bending upper die are respectively provided on the front pressing plate and the rear pressing plate, and the front bending upper die and the rear bending upper die are respectively connected to the front bending cylinder and the rear bending cylinder; The transverse rib bending mechanism includes a transverse rib bending frame, a transverse rib lower die is arranged near the bottom of the transverse rib bending frame, a pressure block is arranged on the transverse rib bending frame above the transverse rib lower die, the pressure block is fixed to the push rod of the pressure block cylinder fixed on the transverse rib bending frame, and a transverse rib upper die is arranged obliquely above the transverse rib lower die, and the transverse rib upper die is connected to the push rod of the upper die cylinder fixed on the transverse rib bending frame.

2. The civil air defense net bending device according to claim 1, characterized in that: The front pressing plate and the rear pressing plate are respectively provided with a front fixed shaft and a rear fixed shaft, and the front bending upper die and the rear bending upper die are respectively movably connected with the front pressing plate and the rear pressing plate through the front fixed shaft and the rear fixed shaft.

3. The civil air defense net bending device according to claim 1, characterized in that: The transverse rib upper die comprises a transverse rib upper die frame and a pressing wheel fixed on the transverse rib upper die frame.

4. A method for bending a civil air defense net using the bending device according to claim 1, 2 or 3, characterized in that: The method comprises the following steps: The first step is to send the network The welded mesh to be bent is sent forward by the mesh feeding mechanism, so that the position where the front end of the longitudinal reinforcement of the civil air defense mesh needs to be bent reaches the front of the lower die of the longitudinal reinforcement; The second step is to bend the longitudinal reinforcement at the front end of the mesh. In the first step, the lower die lifting mechanism drives the lower die of the longitudinal rib to move upward, so that the lower die of the longitudinal rib is against the bottom of the longitudinal rib that needs to be bent; In the second step, the upper beam lifting mechanism drives the upper beam to press downward, so that the upper fixing plate is pressed on the longitudinal reinforcement to be bent, and the upper fixing plate and the lower mold of the longitudinal reinforcement clamp and fix the longitudinal reinforcement; Step (3), the front bending cylinder drives the front bending upper die to press down, and the longitudinal ribs are bent along the front of the longitudinal rib lower die; Fourth, the front bending cylinder drives the front bending upper die to move upward, and the upper beam lifting mechanism drives the upper beam to move upward, so that the upper fixing plate leaves the longitudinal reinforcement; Step 3: Continue to send the network The mesh feeding mechanism feeds the mesh forward so that both ends of the transverse reinforcement reach above the transverse reinforcement lower die of the transverse reinforcement bending mechanism; The fourth step is to bend the transverse ribs on both sides of the mesh In the first step, the push rod of the block pressing cylinder drives the block pressing downward, and the transverse rib is pressed and fixed by the block pressing and the lower die of the transverse rib; In the second step, the upper die cylinder drives the upper die of the transverse rib to press downward, and the transverse rib is bent under the action of the upper die of the transverse rib and the lower die of the longitudinal rib; Step (3), the upper die cylinder drives the upper die of the transverse rib to move upward, and the push rod of the block cylinder drives the block to move upward, and the block leaves the transverse rib; Step (4), the mesh feeding mechanism continues to feed the mesh forward, and the two ends of the adjacent transverse ribs reach the top of the transverse rib lower die of the transverse rib bending mechanism, and steps (1) to (3) are repeated until the last transverse rib of the mesh is bent, and then the next step is entered; Step 5: Continue to send the network The mesh is sent forward by the mesh feeding mechanism so that the position where the rear end of the longitudinal reinforcement of the civil air defense mesh needs to be bent reaches the rear of the lower mold of the longitudinal reinforcement; Step 6: Bend the longitudinal reinforcement at the rear end of the mesh In the first step, the lower die lifting mechanism drives the lower die of the longitudinal rib to move upward, so that the lower die of the longitudinal rib is against the bottom of the longitudinal rib that needs to be bent; In the second step, the upper beam lifting mechanism drives the upper beam to press downward, so that the upper fixing plate is pressed on the longitudinal reinforcement to be bent, and the upper fixing plate and the lower mold of the longitudinal reinforcement clamp and fix the longitudinal reinforcement; Step (3), the rear bending cylinder drives the rear bending upper die to press down, and the longitudinal ribs are bent along the rear of the longitudinal rib lower die; Fourth, the rear bending cylinder drives the rear bending upper die to move upward, and the upper beam lifting mechanism drives the upper beam to move upward, so that the upper fixing plate leaves the longitudinal reinforcement; Step 7: Send out the mesh The folded mesh is delivered through the mesh delivery mechanism.

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