Frame bending clamp and die pressing bending device

Abstract

The utility model provides a frame bending clamp and a die pressing bending device. The frame bending clamp comprises a bending movable die and a bending fixed die which can move relatively, the bending movable die and the bending fixed die form a bending cavity together during die assembly, the bending cavity comprises a preset angle bending section and a transition angle bending section, and the preset angle bending section and the transition angle bending section are sequentially arranged in the moving direction of the bending movable die. And the bending movable die is configured to extrude the profile into the preset angle bending section to be bent for the first time and extrude the profile into the transition angle bending section to be bent for the second time. According to the frame bending clamp, on the basis that the structural complexity of the frame is prevented from being increased, the problem that the frame is deformed due to the fact that the bending angle is changed due to springback after being bent is well solved, and then effective control over the bending angle of the frame is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of profile bending equipment technology, and in particular to a frame bending fixture and a molding bending device. Background Technology

[0002] In the bending and forming of both plastic and aluminum profile frames, bending structures are often used to reduce the formation of weld lines. For example, the utility model patent application with application number CN201620343207.3 uses a matching punch and die to achieve the molding bending of aluminum profiles. However, in reality, whether it is plastic or aluminum profile frames, the frame will spring back after leaving the mold, especially the aluminum profile frame, which has a large amount of springback. This causes the angle at the bend to be greater than the angle during molding, resulting in the shape deformation of the frame, making it unusable. For example, the utility model with application number CN201920173684.3 adds a right-angle limiting part at the bend, which tightens the bend and avoids springback, but increases the structural complexity of the frame and the difficulty of forming the frame. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a frame bending fixture and molding bending device that can effectively control the bending angle of the frame by avoiding increasing the structural complexity of the frame and overcoming the problem of deformation caused by the springback of the frame after bending.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A frame bending fixture includes a movable bending die and a fixed bending die, which are movable relative to each other. The movable bending die and the fixed bending die together form a bending cavity when the die is closed. The bending cavity includes a preset angle bending section and a transition angle bending section. The preset angle bending section and the transition angle bending section are arranged sequentially along the moving direction of the movable bending die. The movable bending die is configured to extrude the profile into the preset angle bending section for a first bending and extrude the profile into the transition angle bending section for a second bending.

[0006] In one embodiment, the fixed bending die is provided with a first convex surface on the side near the moving bending die. The first convex surface includes a first bending surface and a second bending surface, and the first bending surface and the second bending surface intersect at a first included angle.

[0007] The bending moving die has a first concave surface on the side near the bending fixed die. The first concave surface includes a third bending surface and a fourth bending surface. The third bending surface and the fourth bending surface intersect to form a second included angle. The first included angle and the second included angle are correspondingly set, and the first included angle is greater than the second included angle. The side wall of the bending moving die away from the second included angle is located on the outer periphery of the bending fixed die.

[0008] When the bending moving mold and the bending fixed mold are closed, the first bending surface, the second bending surface, the third bending surface and the fourth bending surface together form a bending cavity. The preset angle bending segment is set adjacent to the first bending surface and the second bending surface, and the transition angle bending segment is set adjacent to the third bending surface and the fourth bending surface.

[0009] In one embodiment, the first included angle is rounded; and,

[0010] The second included angle is rounded.

[0011] In one embodiment, the first included angle is a right angle.

[0012] In one embodiment, the first included angle is greater than 0 degrees and less than 90 degrees compared to the second included angle.

[0013] In one embodiment, the sidewall of the bending die away from the first included angle is provided with a positioning groove;

[0014] When the bending die presses the profile into the transition angle bending section and causes a secondary bend, the profile is engaged with the positioning groove and abuts against the bottom of the positioning groove.

[0015] In one embodiment, the fixed bending die is provided with a second concave surface on the side near the moving bending die. The second concave surface includes a fifth bending surface and a sixth bending surface, and the fifth bending surface and the sixth bending surface intersect at a third included angle.

[0016] The bending moving die has a second convex surface on the side near the bending fixed die. The second convex surface includes a seventh bending surface and an eighth bending surface. The seventh bending surface and the eighth bending surface intersect to form a fourth included angle. The third included angle is set in a one-to-one correspondence with the fourth included angle, and the third included angle is smaller than the fourth included angle. The side wall of the bending fixed die away from the third included angle is located on the outer periphery of the bending moving die.

[0017] When the bending moving mold and the bending fixed mold are closed, the fifth bending surface, the sixth bending surface, the seventh bending surface and the eighth bending surface together form a bending cavity. The preset angle bending segment is set adjacent to the seventh bending surface and the eighth bending surface, and the transition angle bending segment is set adjacent to the fifth bending surface and the sixth bending surface.

[0018] In one embodiment, the third included angle is rounded; and,

[0019] The fourth included angle is rounded.

[0020] In one embodiment, the fourth included angle is a right angle.

[0021] In one embodiment, the fourth included angle is greater than 0 degrees and less than 90 degrees compared to the third included angle.

[0022] In one embodiment, the bending die includes a fixed die base and a bending die, the bending die is mounted on the fixed die base, and the bending moving die is slidably disposed on the fixed die base. The bending moving die and the bending die together form the bending cavity when the die is closed.

[0023] In one embodiment, the fixed mold base is provided with a sliding channel, the extension direction of the sliding channel is the same as the movement direction of the bending moving mold, and the bending moving mold is slidably connected to the sliding channel.

[0024] In one embodiment, the sliding channel is a sliding groove or a sliding track.

[0025] In one embodiment, the bending die is detachably connected to the fixed die base.

[0026] A molding and bending device includes a worktable, a cylinder, and a frame bending fixture as described in any of the above embodiments. The fixed bending die is mounted on the worktable, the cylinder is connected to the worktable, and the power output end of the cylinder is connected to the moving bending die to drive the moving bending die to move toward or away from the fixed bending die.

[0027] Compared with the prior art, the present invention has at least the following advantages:

[0028] This utility model's frame bending fixture allows the bending moving die and bending fixed die to form a bending cavity together during die closing. Thus, during forming, the profile is placed on the bending fixed die, and the bending moving die moves towards the bending fixed die and applies pressure to the profile, achieving die-press bending of the profile. Furthermore, the preset angle bending segment and the transition angle bending segment are arranged sequentially along the moving direction of the bending moving die. The bending moving die is configured to compress the profile into the preset angle bending segment for a first bend and then compress the profile into the transition angle bending segment for a second bend. That is, the bending moving die applies pressure to the profile, causing the profile to gradually bend until the set angle is achieved, at which point the profile is bent. The profile undergoes a first bend; then, the bending die continues to apply pressure to the profile, causing it to bend further. At this point, the profile completes a second bend, and is squeezed by the bending die to the transition angle bending section. That is, the profile bends further on the basis of the set angle bend. The angle of the further bend is used to compensate for the springback of the profile after bending. In this way, the problem of deformation caused by the change of bending angle due to springback after the frame bend is effectively overcome. This improves the effective control of the bending angle after the profile bends and springbacks, and there is no need to add structural elements to the profile. It effectively reduces the deformation of the frame without increasing the structural complexity of the frame. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the frame bending fixture according to one embodiment of the present invention;

[0031] Figure 2 for Figure 1 The diagram shows the usage status of the frame bending fixture.

[0032] Figure 3 for Figure 2 A magnified view of point A on the shown frame bending fixture;

[0033] Figure 4 for Figure 1 An exploded view of the frame bending fixture shown.

[0034] Figure 5 for Figure 1 Another exploded view of the frame bending fixture shown. Detailed Implementation

[0035] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] This application provides a frame bending fixture. The frame bending fixture includes a movable bending die and a fixed bending die that can move relative to each other. The movable bending die and the fixed bending die together form a bending cavity when the die is closed. The bending cavity includes a preset angle bending section and a transition angle bending section. The preset angle bending section and the transition angle bending section are arranged sequentially along the moving direction of the movable bending die. The movable bending die is configured to extrude the profile into the preset angle bending section for a first bend and then extrude the profile into the transition angle bending section for a second bend.

[0039] The aforementioned frame bending fixture allows the bending moving die and the bending fixed die to form a bending cavity together during die closing. Thus, during forming, the profile is placed on the bending fixed die, and the bending moving die moves towards the bending fixed die and applies pressure to the profile, achieving die-press bending of the profile. Furthermore, the preset angle bending segment and the transition angle bending segment are arranged sequentially along the moving direction of the bending moving die. The bending moving die is configured to extrude the profile into the preset angle bending segment for a first bend and then extrude the profile into the transition angle bending segment for a second bend. That is, the bending moving die applies pressure to the profile, causing the profile to gradually bend until the set angle is achieved. At this point, the profile completes one bending operation. The first bend; then, the bending die continues to apply pressure to the profile to cause it to bend further. At this time, the profile completes the second bend, and the profile is squeezed by the bending die to the transition angle bending section. That is, the profile bends further on the basis of the set angle bend. The angle of the further bend is used to compensate for the springback of the profile after bending. In this way, the problem of deformation caused by the change of bending angle due to springback after the frame bend is better overcome. That is, the effective control of the bending angle after the profile bends and springbacks is improved, and there is no need to add structural elements to the profile. It effectively reduces the deformation of the frame without increasing the structural complexity of the frame.

[0040] To better understand the frame bending fixture of this application, the following further explanation is provided:

[0041] Please refer to the following: Figures 1 to 3 One embodiment of the frame bending fixture 10 includes a bending moving die 100 and a bending fixed die 200 that are movable relative to each other. The bending moving die 100 and the bending fixed die 200 together form a bending cavity 1001 when the die is closed. The bending cavity 1001 includes a preset angle bending section 1002 and a transition angle bending section 1003. The preset angle bending section 1002 and the transition angle bending section 1003 are arranged sequentially along the moving direction of the bending moving die 100. The bending moving die 100 is configured to extrude the profile 20 into the preset angle bending section 1002 for a first bending and extrude the profile 20 into the transition angle bending section 1003 for a second bending.

[0042] The aforementioned frame bending fixture 10 allows the bending moving die 100 and the bending fixed die 200 to form a bending cavity 1001 together during die closing. Thus, during forming, the profile 20 is placed on the bending fixed die 200, and the bending moving die 100 moves toward the bending fixed die 200 and applies pressure to the profile 20, achieving die bending of the profile 20. Furthermore, the preset angle bending segment 1002 and the transition angle bending segment 1003 are arranged sequentially along the moving direction of the bending moving die 100. The bending moving die 100 is configured to extrude the profile 20 into the preset angle bending segment 1002 for a first bend and then extrude the profile 20 into the transition angle bending segment 1003 for a second bend. In other words, the bending moving die 100 applies pressure to the profile 20, causing the profile 20 to gradually bend to its final shape. The profile 20 is bent at a set angle, at which point it completes one bend. Then, the bending die 100 continues to apply pressure to the profile 20, causing it to bend further. At this point, the profile 20 completes a second bend, and the profile 20 is squeezed by the bending die 100 to the transition angle bending section 1003. That is, the profile 20 bends further on the basis of the bend at the set angle. The angle of the further bend is used to compensate for the springback of the profile 20 after bending. In this way, the problem of deformation caused by the change of bending angle due to the springback after the frame is bent is better overcome. That is, the effective control of the bending angle after the springback of the profile 20 is improved, and there is no need to add any structural elements to the profile 20. This effectively reduces the deformation of the frame without increasing the structural complexity of the frame.

[0043] Please refer to the following: Figure 1 , Figure 2 and Figure 4 In one embodiment, the fixed bending die 200 has a first convex surface 201 on the side near the moving bending die 100. The first convex surface 201 includes a first bending surface 202 and a second bending surface 203, which intersect at a first included angle α. Further details are provided in the following sections. Figure 1 , Figure 2 and Figure 5 The bending moving die 100 has a first concave surface 101 on the side near the bending fixed die 200. The first concave surface 101 includes a third bending surface 102 and a fourth bending surface 103. The third bending surface 102 and the fourth bending surface 103 intersect to form a second included angle b. The first included angle a and the second included angle b are correspondingly set, and the first included angle a is greater than the second included angle b. The side wall of the bending moving die 100 away from the second included angle b is located on the outer periphery of the bending fixed die 200. Further, please refer to [the relevant documentation]. Figures 1 to 3When the bending moving die 100 and the bending fixed die 200 are closed, the first bending surface 202, the second bending surface 203, the third bending surface 102, and the fourth bending surface 103 together form a bending cavity 1001. The preset angle bending segment 1002 is located near the first bending surface 202 and the second bending surface 203, and the transition angle bending segment 1003 is located near the third bending surface 102 and the fourth bending surface 103. Further, when the extruded profile 20 is within the preset angle bending segment 1002, the side of the profile 20 closest to the bending fixed die 200 lies flat on the first bending surface 202 and the second bending surface 203; when the extruded profile 20 is within the transition angle bending segment 1003, the profile 20 located at the first included angle a is at least partially separated from the first bending surface 202 and the second bending surface 203, until it lies flat on the third bending surface 102 and the fourth bending surface 103. It is understood that the first convex surface 201 on the bending fixed die 200 and the first concave surface 101 on the bending moving die 100 are correspondingly arranged. During the mold closing process of the bending fixed die 200 and the bending moving die 100, the profile 20 is placed on the bending fixed die 200, and the bending moving die 100 applies pressure to the profile 20 to achieve the molding bending of the profile 20. Specifically, when the profile 20 is extruded into the preset angle bending section 1002, the side of the profile 20 closest to the bending fixed die 200 is laid flat on the first bending surface 202 and the second bending surface 203; when the profile 20 is extruded into the transition angle bending section 1003, at least part of the profile 20 located at the first included angle α is bent. The profile 20 is detached from the first bending surface 202 and the second bending surface 203 until it is laid flat on the third bending surface 102 and the fourth bending surface 103. This effectively achieves the bending of the profile 20 at the preset angle and also effectively achieves the further bending of the profile 20. The angle of the further bending is used to compensate for the springback of the profile 20 after bending. In this way, the problem of deformation caused by the change of bending angle due to the springback after the frame is bent is effectively overcome. That is, the effective control of the bending angle after the springback of the profile 20 is improved, and there is no need to add any structural elements to the profile 20. This effectively reduces the deformation of the frame without increasing the structural complexity of the frame.

[0044] Please refer to the following: Figures 2 to 4 In one embodiment, the first included angle a is rounded. Further, the second included angle b is rounded. Further, the first included angle a is a right angle. It can be understood that the rounded corners improve the aesthetics of the frame, and the fact that the first included angle a is a right angle makes the frame formed after the profile is bent 20° into a rectangular shape.

[0045] In one embodiment, the first included angle is greater than 0 degrees and less than 90 degrees compared to the second included angle, that is, the range of the first included angle being greater than the second included angle is (0°, 90°). It can be understood that the specific angle value is adjusted and replaced for profiles of different materials or different batches of the same material, so as to better adapt to the compensation of springback of different profiles, and better improve the effective control of the bending angle after the profile bends and springbacks. It effectively overcomes the problem of deformation caused by the change of bending angle after the frame bends and springbacks, and there is no need to add structural elements to the profile. That is, it effectively reduces the deformation of the frame while avoiding increasing the structural complexity of the frame.

[0046] Please refer to the following: Figures 2 to 4 In one embodiment, the side wall of the bending die 200 away from the first included angle α is provided with a positioning groove 203. Further, when the bending die 100 extrudes the profile 20 into the transition angle bending section 1003 and undergoes a secondary bend, the profile 20 engages with the positioning groove 203 and abuts against the bottom of the positioning groove 203, improving the positioning accuracy of the profile 20 at the bend. Further, the positioning groove 203 is provided on the side wall of the bending die 220 away from the first included angle α. Further, there are two positioning grooves 203, which are arranged opposite to each other on the two side walls of the bending die 220 away from the first included angle α.

[0047] In one embodiment, the fixed bending die has a second concave surface on the side near the moving bending die. The second concave surface includes a fifth bending surface and a sixth bending surface, which intersect to form a third included angle. Further, the moving bending die has a second convex surface on the side near the fixed bending die. The second convex surface includes a seventh bending surface and an eighth bending surface, which intersect to form a fourth included angle. The third included angle corresponds to the fourth included angle, and the third included angle is smaller than the fourth included angle. The sidewall of the fixed bending die away from the third included angle is located on the outer periphery of the moving bending die. Further, when the moving bending die and the fixed bending die are closed, the fifth, sixth, seventh, and eighth bending surfaces together form a bending cavity. A preset angle bending section is located near the seventh and eighth bending surfaces, and a transition angle bending section is located near the fifth and sixth bending surfaces. Furthermore, when the extruded profile reaches the preset angle bending section, the side of the profile closest to the bending moving die lies flat on the seventh and eighth bending surfaces; when the extruded profile reaches the transition angle bending section, the profile located at the fourth included angle at least partially detaches from the seventh and eighth bending surfaces until it lies flat on the fifth and sixth bending surfaces. It can be understood that the second convex surface on the bending fixed die corresponds to the second concave surface on the bending moving die. During the closing process of the bending fixed die and the bending moving die, the profile is placed on the bending fixed die, and the bending moving die applies pressure to the profile to achieve die-press bending. Specifically, when the extruded profile reaches the preset angle bending section, the side of the profile closest to the bending moving die lies flat on the seventh and eighth bending surfaces; when the extruded profile reaches the transition angle bending section, the profile located at the fourth included angle at least partially detaches from the seventh and eighth bending surfaces until it lies flat on the fifth and sixth bending surfaces. By laying the material on the fifth and sixth bending surfaces, the preset bending angle of the profile is effectively achieved, and further bending of the profile is also effectively achieved. The angle of further bending is used to compensate for the springback of the profile after bending. In this way, the problem of deformation caused by the change of bending angle due to springback after bending of the frame is effectively overcome. That is, the effective control of the bending angle after the profile springback is improved, and there is no need to add structural elements to the profile. This effectively reduces the deformation of the frame without increasing the structural complexity of the frame.

[0048] In one embodiment, the third included corner is rounded. Further, the fourth included corner is rounded. Further, the fourth included corner is a right angle. It can be understood that the rounded corners improve the aesthetics of the frame, and the fact that the fourth included corner is a right angle ensures that the frame formed after bending the profile is rectangular.

[0049] In one embodiment, the fourth included angle is greater than 0 degrees and less than 90 degrees compared to the third included angle. It can be understood that the specific angle values ​​are adjusted and replaced for different materials or different batches of the same material to better adapt to the springback compensation of different profiles. This improves the effective control of the bending angle after the profile bends and springs back, effectively overcoming the problem of deformation caused by changes in the bending angle due to springback after bending the frame. Furthermore, it eliminates the need for additional structural elements to the profile, effectively reducing frame deformation while avoiding increasing the structural complexity of the frame.

[0050] Please refer to the following: Figures 2 to 4 In one embodiment, the bending fixed die 200 includes a fixed die base 210 and a bending die 220. The bending die 220 is mounted on the fixed die base 210, and the bending movable die 100 is slidably disposed on the fixed die base 210. The bending movable die 100 and the bending die 220 together form a bending cavity 1001 when the die is closed. Furthermore, the bending die 220 is detachably connected to the fixed die base 210, improving the accuracy of the die closure between the bending movable die 100 and the bending die 220. Further, a first convex surface 201 is disposed on the side of the bending die 220 near the bending movable die 100. Alternatively, a second concave surface is disposed on the side of the bending die near the bending movable die.

[0051] Please refer to the following: Figures 2 to 4 In one embodiment, the fixed mold base 210 is provided with a sliding channel 204, the extending direction of the sliding channel 204 being the same as the moving direction of the bending moving mold 100, and the bending moving mold 100 being slidably connected to the sliding channel 204. Further, the sliding channel 204 is a sliding groove. Further, the sliding channel is a sliding track, further ensuring the accuracy of mold closing between the bending moving mold and the bending die.

[0052] This application provides a molding and bending apparatus. One embodiment of the molding and bending apparatus includes a worktable, a cylinder, and a frame bending fixture as described in any of the above embodiments. A fixed bending die is mounted on the worktable, the cylinder is connected to the worktable, and the power output end of the cylinder is connected to a moving bending die to drive the moving bending die to move towards or away from the fixed bending die. Further, please refer to... Figures 1 to 3 In this embodiment, the frame bending fixture 10 includes a bending moving die 100 and a bending fixed die 200 that are movable relative to each other. The bending moving die 100 and the bending fixed die 200 together form a bending cavity 1001 when the die is closed. The bending cavity 1001 includes a preset angle bending section 1002 and a transition angle bending section 1003. The preset angle bending section 1002 and the transition angle bending section 1003 are arranged sequentially along the moving direction of the bending moving die 100. The bending moving die 100 is configured to extrude the profile 20 into the preset angle bending section 1002 for a first bending and extrude the profile 20 into the transition angle bending section 1003 for a second bending.

[0053] The aforementioned molding and bending device uses a frame bending fixture, which effectively overcomes the springback deformation problem when the molding and bending device is used to bend profiles, improves the effective control of the bending angle after the profile springback, and eliminates the need to add structural components to the profile. This effectively reduces the deformation of the frame while avoiding increasing the structural complexity of the frame.

[0054] Compared with the prior art, the present invention has at least the following advantages:

[0055] The frame bending fixture 10 of this utility model allows the bending moving die 100 and the bending fixed die 200 to form a bending cavity 1001 together during mold closing. Thus, during molding, the profile 20 is placed on the bending fixed die 200, and the bending moving die 100 moves towards the bending fixed die 200 and applies pressure to the profile 20, achieving molding bending of the profile 20. Furthermore, the preset angle bending segment 1002 and the transition angle bending segment 1003 are arranged sequentially along the moving direction of the bending moving die 100. The bending moving die 100 is configured to compress the profile 20 into the preset angle bending segment 1002 for a first bending and compress the profile 20 into the transition angle bending segment 1003 for a second bending. That is, the bending moving die 100 applies pressure to the profile 20, causing the profile 20 to gradually bend to... After completing the bend at the set angle, the profile 20 completes one bend. Then, the bending die 100 continues to apply pressure to the profile 20, causing it to bend further. At this point, the profile 20 completes a second bend, and the profile 20 is squeezed by the bending die 100 to the transition angle bending section 1003. That is, the profile 20 bends further on the basis of the bend at the set angle. The angle of the further bend is used to compensate for the springback of the profile 20 after bending. In this way, the problem of deformation caused by the change of bending angle due to the springback after the frame is bent is better overcome. That is, the effective control of the bending angle after the springback of the profile 20 is improved, and there is no need to add any structural elements to the profile 20. This effectively reduces the deformation of the frame without increasing the structural complexity of the frame.

[0056] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A frame bending fixture comprising a movable bending die and a stationary bending die which are relatively movable, said movable bending die and said stationary bending die together forming a bending cavity when clamped, characterized in that, The bending cavity comprises a preset angle bending section and a transition angle bending section, the preset angle bending section and the transition angle bending section are arranged in sequence along the moving direction of the bending movable die, and the bending movable die is configured to extrude the profile to bend once in the preset angle bending section and extrude the profile to bend twice in the transition angle bending section.

2. The frame bending jig according to claim 1, wherein The bending fixed die is provided with a first outer convex surface on the side close to the bending movable die, the first outer convex surface comprises a first bending surface and a second bending surface, and the first bending surface and the second bending surface intersect to form a first included angle; The bending movable die is provided with a first inner concave surface on the side close to the bending fixed die, the first inner concave surface comprises a third bending surface and a fourth bending surface, the third bending surface and the fourth bending surface intersect to form a second included angle, the first included angle and the second included angle are correspondingly arranged, the first included angle is greater than the second included angle, and the side wall of the bending movable die away from the second included angle is located on the outer periphery of the bending fixed die; When the bending movable die and the bending fixed die are closed, the first bending surface, the second bending surface, the third bending surface and the fourth bending surface form a bending cavity together, the preset angle bending section is arranged adjacent to the first bending surface and the second bending surface, and the transition angle bending section is arranged adjacent to the third bending surface and the fourth bending surface.

3. The bezel bending jig according to claim 2, characterized by The first included angle is rounded; and The second included angle is rounded; and / or The first included angle is a right angle; and / or The first included angle is greater than 0 degrees and less than 90 degrees compared with the second included angle.

4. The bezel bending jig according to claim 2, wherein The side wall of the bending fixed die away from the first included angle is provided with a positioning groove; When the bending movable die extrudes the profile to bend twice in the transition angle bending section, the profile is clamped in the positioning groove and abuts against the groove bottom of the positioning groove.

5. The bezel bending jig according to claim 1, wherein The bending fixed die is provided with a second inner concave surface on the side close to the bending movable die, the second inner concave surface comprises a fifth bending surface and a sixth bending surface, and the fifth bending surface and the sixth bending surface intersect to form a third included angle; The bending movable die is provided with a second outer convex surface on the side close to the bending fixed die, the second outer convex surface comprises a seventh bending surface and an eighth bending surface, the seventh bending surface and the eighth bending surface intersect to form a fourth included angle, the third included angle and the fourth included angle are correspondingly arranged, the third included angle is less than the fourth included angle, and the side wall of the bending fixed die away from the third included angle is located on the outer periphery of the bending movable die; When the bending movable die and the bending fixed die are closed, the fifth bending surface, the sixth bending surface, the seventh bending surface and the eighth bending surface form a bending cavity together, the preset angle bending section is arranged adjacent to the seventh bending surface and the eighth bending surface, and the transition angle bending section is arranged adjacent to the fifth bending surface and the sixth bending surface.

6. The bezel bending jig according to claim 5, wherein The third included angle is rounded; and The fourth included angle is rounded; and / or The fourth included angle is a right angle; and / or The fourth included angle is greater than 0 degrees and less than 90 degrees compared with the third included angle.

7. The bezel bending jig according to claim 1, wherein The bending stationary die comprises a stationary die base and a bending die, the bending die is installed on the stationary die base, the bending movable die is slidably arranged on the stationary die base, and the bending movable die and the bending die jointly form the bending cavity when the die is closed.

8. The bezel bending jig according to claim 7, characterized by The stationary die base is provided with a sliding channel, the extension direction of the sliding channel is the same as the moving direction of the bending movable die, and the bending movable die is slidably connected to the sliding channel.

9. The bezel bending jig according to claim 8, wherein The sliding channel is a sliding groove or a sliding rail; and / or, The bending die is detachably connected to the stationary die base.

10. A press brake apparatus, comprising: The frame bending clamp comprises a workbench, a cylinder and the frame bending clamp according to any one of claims 1 to 9, the bending stationary die is installed on the workbench, the cylinder is connected to the workbench, and the power output end of the cylinder is connected with the bending movable die to drive the bending movable die to move towards the direction of approaching or moving away from the bending stationary die.

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