Ground flat steel bending apparatus

Abstract

The application discloses a ground flat steel bending equipment, relates to the technical field of bending machines, and comprises a bending machine body, a lifting block, a threaded rod, a pressing roller and three groups of fixed roller sets. The lifting block, the threaded rod and the pressing roller are located at the central axis position of the bending machine body. The threaded rod is used for lifting the lifting block and the pressing roller. The three groups of fixed roller sets are located at the two sides of the central axis of the bending machine body. The application is convenient for lowering the pressing roller to bend the flat steel into a specific angle range, avoids bending the flat steel into an acute angle, and more avoids the sharp end effect. The distance between the connecting strip and the first supporting plate can be adjusted according to the specification of the flat steel. The first limiting plate, the second limiting plate and the two limiting sleeves are used for limiting the position of the flat steel, avoiding the flat steel from being separated from the fixed roller sets and the pressing roller. The first limiting plate and the second limiting plate are away from or close to each other, so that the first limiting plate and the second limiting plate can limit and clamp the position of the flat steel.

Description

Technical Field

[0001] This invention relates to the field of bending machine technology, specifically to a grounded flat steel bending device. Background Technology

[0002] Ordinary bending machines are general sheet metal processing equipment, mostly used for bending steel plates. The molds have sharp edges and corners. Grounding flat steel bending machines are special tools for electrical grounding. They can bend 90° angles and 180° Ω expansion bends according to specifications. The cold bending process results in uniform stress, no cracks in the flat steel, and an intact galvanized layer. It has a built-in angle scale, and the equipment is lightweight and suitable for construction sites. It ensures the conductivity of the grounding conductor and greatly improves the quality of lightning protection grounding construction.

[0003] In the existing technology, the flat steel bending equipment has certain drawbacks. On-site operation relies solely on the experience of workers to operate the flat steel bending machine. The flat steel is prone to defects such as inner angles less than 90° and sharp corners. Sharp angles and corners will form a point effect. If the bending is made into a sharp angle or even a corner, it is easy to cause high stress concentration at the bending point, cracking and peeling of the galvanized layer, and rapid corrosion of the flat steel substrate. Summary of the Invention

[0004] The purpose of this invention is to provide a grounding flat steel bending device to solve the problems mentioned in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A grounded flat steel bending device includes a bending machine body, a lifting block, a threaded rod, a lower pressure roller, and three sets of fixed rollers. The lifting block, threaded rod, and lower pressure roller are located on the central axis of the bending machine body. The threaded rod is used to lift the lifting block and the lower pressure roller. The three sets of fixed rollers are located on both sides of the central axis of the bending machine body. A support assembly is provided between the middle set of fixed rollers. The support assembly includes a first support plate and a second support plate. The top ends of the first support plate and the second support plate are located at two fixed shafts of the middle set of fixed rollers. An intermediate pin is provided at the intersection of the first support plate and the second support plate. Both the first support plate and the second support plate are slidably connected to the intermediate pin. The intermediate pin is located directly below the lower pressure roller. The first support plate and the second support plate are arranged at 90°–180°. The first support plate and the second support plate are used to support flat steel bent at different angles.

[0007] As a preferred embodiment of the present invention, both the end of the first support plate and the end of the second support plate are provided with fixing holes. The interior of the fixing holes is transitionally fitted with the fixing shaft of the intermediate set of fixing rollers. The transitional fit between the fixing holes and the fixing shaft of the intermediate set of fixing rollers is used to rotatably connect the fixing holes and the intermediate set of fixing rollers under external force. The rotation range of the first support plate and the rotation range of the second support plate intersect.

[0008] As a preferred embodiment of the present invention, the first support plate has a first guide groove inside, the second support plate has a second guide groove inside, the intermediate pin is located inside the first guide groove and the second guide groove, the groove width of the first guide groove and the groove width of the second guide groove are both adapted to the diameter of the intermediate pin, and the interior of the first guide groove and the interior of the second guide groove are slidably connected to the intermediate pin.

[0009] As a preferred embodiment of the present invention, when the first support plate and the second support plate are located in the middle set of fixed rollers, the first support plate and the second support plate are arranged at 90°, the intermediate pin is located at the bottom end of the first guide groove and the bottom end of the second guide groove, the first support plate and the second support plate are arranged at 180°, and the intermediate pin is located at the top end of the first guide groove and the top end of the second guide groove.

[0010] As a preferred embodiment of the present invention, two fixing blocks are provided on the surface of the first support plate and at the first guide groove. The two fixing blocks are located inside the two sides of the first guide groove, and a connecting strip is connected between the two fixing blocks. Several connecting grooves are opened on the side walls of the two fixing blocks. The connecting strip is located inside one of the connecting grooves. Both ends of the connecting strip are connected to the two fixing blocks by connecting pins. The fixing blocks are fixed to the first support plate by bolts. The connecting strip is used to press down the grounding flat steel of different thicknesses.

[0011] As a preferred embodiment of the present invention, the surfaces of the two fixing blocks are provided with connecting holes, and the connecting pins are located inside the connecting holes. The surfaces of the first support plate and the second support plate are provided with scale lines. The two fixing blocks are slidably connected to the first guide groove of the first support plate. The scale lines are used to determine the bending radius of the grounding flat steel when the first support plate and the second support plate are arranged at 90°.

[0012] As a preferred embodiment of the present invention, an alignment component is provided at the end of the first support plate, the end of the second support plate, and the lower pressure roller. The alignment component includes a limiting sleeve, which is welded to the top of the first support plate and the top of the second support plate. A first limiting plate and a second limiting plate are sleeved on the outside of the lower pressure roller. The first limiting plate and the second limiting plate are slidably connected along the lower pressure roller. The first support plate, the second support plate, the fixing hole, and the intermediate pin are used to prevent the grounding flat steel from moving along the axis.

[0013] As a preferred embodiment of the present invention, the lower pressure roller is composed of two parts. Two fixing studs are arranged along the axial direction of the lower pressure roller. The two fixing studs are provided with a first thread and a second thread on their outer surfaces. The helical direction of the first thread and the helical direction of the second thread are opposite. The two ends of the fixing studs are respectively threadedly connected to a first limiting plate and a second limiting plate. The first limiting plate and the second limiting plate are close to or far from each other. The first limiting plate and the second limiting plate are used to clamp the grounding flat steel.

[0014] As a preferred embodiment of the present invention, the two ends of the fixed stud are rotatably connected to the two end faces of the lower pressure roller, and threaded holes are provided on the surface of the first limiting plate and the surface of the second limiting plate, and the threaded holes are driven by the first thread and the second thread.

[0015] As a preferred embodiment of the present invention, both ends of the fixing stud are provided with nuts, which are used to limit the axial movement of the fixing stud. One end of the fixing stud is provided with an adjustment knob, which is used to rotate the fixing stud.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The system is equipped with a first support plate and a second support plate. The first support plate and the second support plate are used to support the grounded flat steel, which makes it easier for the lower pressure roller to descend and bend the flat steel into a specific angle range, avoiding the flat steel from being bent into a sharp angle and preventing the sharp point effect.

[0018] It is equipped with a fixing block and a connecting strip. The two fixing blocks slide along the inside of the first guide groove. The fixing blocks can limit the length of the straight segment of the bend. The connecting strip can press down the flat steel to prevent the end of the flat steel from sticking out. The distance between the connecting strip and the first support plate can be adjusted according to the specifications of the flat steel.

[0019] The flat steel is equipped with a centering component, which uses a first limiting plate, a second limiting plate and two limiting sleeves to limit the position of the flat steel and prevent the flat steel from detaching from the fixed roller group and the lower pressure roller.

[0020] The first and second threads on the fixed stud, with their opposite directions, allow the first and second limiting plates to move away from or closer to each other, thereby limiting and clamping the position of the flat steel. Attached Figure Description

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a structural diagram of the main body of the present invention;

[0023] Figure 2 This is a schematic diagram of the horizontal arrangement of the first support plate and the second support plate of the present invention;

[0024] Figure 3 This is a schematic diagram of the support components of the present invention;

[0025] Figure 4 This is a schematic diagram of the first guide groove and the second guide groove of the present invention;

[0026] Figure 5 This is a schematic diagram of the fixing block and connecting strip of the present invention;

[0027] Figure 6 This is a schematic diagram of the connecting strip and connecting pin of the present invention;

[0028] Figure 7 This is a schematic diagram of the centering component of the present invention;

[0029] Figure 8 This is a schematic diagram of the first and second threads of the present invention.

[0030] In the diagram: 1. Bending machine body; 2. Lifting block; 3. Threaded rod; 4. Lower pressure roller; 5. Fixed roller group; 6. Support assembly; 7. Centering assembly; 61. First support plate; 62. Second support plate; 63. Fixing hole; 64. Intermediate pin; 65. First guide groove; 66. Second guide groove; 67. Fixing block; 68. Connecting strip; 69. Connecting groove; 610. Scale line; 611. Connecting hole; 612. Connecting pin; 71. Limiting sleeve; 72. Adjusting knob; 73. First limiting plate; 74. Second limiting plate; 75. Fixing stud; 76. First thread; 77. Second thread; 78. Threaded hole. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0033] Example 1:

[0034] Please see Figure 1 - Figure 6 As shown, a grounding flat steel bending device includes a bending machine body 1, a lifting block 2, a threaded rod 3, a lower pressure roller 4, and three sets of fixed roller groups 5. The lifting block 2, threaded rod 3, and lower pressure roller 4 are located on the central axis of the bending machine body 1. The threaded rod 3 is used to lift the lifting block 2 and the lower pressure roller 4. Under the action of rotating the threaded rod 3, the lifting block 2 and the lower pressure roller 4 are lifted and lowered, thereby pressing down the grounding flat steel placed above the middle set of fixed roller groups 5. The three sets of fixed roller groups 5 are located on both sides of the central axis of the bending machine body 1, thereby bending the flat steel into a specific bending angle. A support assembly 6 is provided between the middle set of fixed roller groups 5. The support assembly 6 includes a first support plate 61 and a second support plate 62. The top ends of the first support plate 61 and the second support plate 62 are located at the two fixed shafts of the middle set of fixed roller groups 5. The top ends of the first support plate 61 and the second support plate 62 are both connected to the two fixed shafts of the middle set of fixed roller groups 5, which can place the flat steel... Above the middle set of fixed rollers 5, the fixed rollers 5 provide initial support for the flat steel. A middle pin 64 is provided at the intersection of the first support plate 61 and the second support plate 62. The first support plate 61 and the second support plate 62 are slidably connected to the middle pin 64. The middle pin 64 is located directly below the lower pressure roller 4. The first support plate 61 and the second support plate 62 rotate around the fixed axis of the fixed rollers 5, thereby causing the first support plate 61 and the second support plate 62 to rotate. As a result, the middle pin 64 slides inside the first support plate 61 and the second support plate 62, thus ensuring that the first support plate 61 and the second support plate 62 always intersect. The first support plate 61 and the second support plate 62 are arranged at 90°-180°. The first support plate 61 and the second support plate 62 are used to support flat steel bent at different angles. Since there are certain requirements for the angle of the grounded flat steel bending, the inner angle of the bend must not be less than 90°. Sharp angles, dead V-bends, and sharp right-angle dead bends are prohibited.

[0035] Please see Figure 3 - Figure 5As shown, both the end of the first support plate 61 and the end of the second support plate 62 are provided with fixing holes 63. The interior of the fixing holes 63 is transitionally fitted with the fixing shaft of the intermediate set of fixed rollers 5. The fixing holes 63 of the first support plate 61 and the second support plate 62 are sleeved on the fixing shaft of the fixed rollers 5. The transitional fit ensures that the first support plate 61 and the second support plate 62 can rotate under the action of external force. The first support plate 61 and the second support plate 62 will not rotate under the action of no external force. The transitional fit between the fixing holes 63 and the fixing shaft of the intermediate set of fixed rollers 5 is used to rotatably connect the fixing holes 63 and the intermediate set of fixed rollers 5 under the action of external force. The rotation range of the first support plate 61 and the rotation range of the second support plate 62 intersect. As the lower pressure roller 4 rises and falls in the vertical direction, the first support plate 61 and the second support plate 62 can be rotated to a specific angle as needed.

[0036] Please see Figure 3 - Figure 5 As shown, the first support plate 61 has a first guide groove 65 inside, and the second support plate 62 has a second guide groove 66 inside. The intermediate pin 64 is located inside the first guide groove 65 and the second guide groove 66. The width of the first guide groove 65 and the width of the second guide groove 66 are both adapted to the diameter of the intermediate pin 64. The interiors of the first guide groove 65 and the second guide groove 66 are slidably connected to the intermediate pin 64. The diameter of the intermediate pin 64 is adapted to the width of the first guide groove 65 and the width of the second guide groove 66, so that the intermediate pin 64 can move freely inside the first guide groove 65 and the second guide groove 66.

[0037] Please see Figure 1 - Figure 3 As shown, when the first support plate 61 and the second support plate 62 are located in the middle set of fixed rollers 5, the first support plate 61 and the second support plate 62 are arranged at 90°, and the intermediate pin 64 is located at the bottom end of the first guide groove 65 and the bottom end of the second guide groove 66, thereby ensuring that the first support plate 61 and the second support plate 62 are arranged at a 90° angle; when the first support plate 61 and the second support plate 62 are arranged at 180°, and the intermediate pin 64 is located at the top end of the first guide groove 65 and the top end of the second guide groove 66, the first support plate 61 and the second support plate 62 can be arranged at 180° when they are located at the top. Similarly, the positions of the first support plate 61 and the second support plate 62 can be adjusted between 90° and 180° as needed.

[0038] Please see Figure 4 - Figure 6 As shown, two fixing blocks 67 are provided on the surface of the first support plate 61 and at the first guide groove 65. The two fixing blocks 67 are located inside the two sides of the first guide groove 65. When the two fixing blocks 67 are inserted into the two sides of the first guide groove 65, the fixing blocks 67 slide along the inside of the first guide groove 65. A connecting strip 68 connects the two fixing blocks 67. Several connecting grooves 69 are opened on the side walls of the two fixing blocks 67. The connecting strip 68 is located inside one of the connecting grooves 69. Both ends of the connecting strip 68 are connected to the first guide groove 65 by connecting pins 612. Two fixing blocks 67 are connected together. A connecting strip 68 is inserted into the connecting groove 69 of the two fixing blocks 67. The two ends of the connecting strip 68 are then connected to the inside of the fixing blocks 67 by the connecting pin 612 to prevent the fixing blocks 67 from falling out of the inside of the first guide groove 65. The fixing blocks 67 are fixed to the first support plate 61 by bolts. The connecting strip 68 is used to press down the grounding flat steel of different thicknesses. The fixing blocks 67 are screwed in by bolts to straighten the connecting strip 68 between the two fixing blocks 67, which also prevents the fixing blocks 67 from falling out of the inside of the first guide groove 65.

[0039] Please see Figure 5 and Figure 6 As shown, both fixing blocks 67 have connecting holes 611 on their surfaces, and connecting pins 612 are located inside the connecting holes 611. The surfaces of the first support plate 61 and the second support plate 62 are both marked with scale lines 610. Since the two edges of the flat steel are tangent to the first support plate 61 and the second support plate 62, and the position of the lower pressure roller 4 as it descends, the bending radius can be determined by the straight line position of the bend according to the scale lines 610 of the first support plate 61 and the second support plate 62. The two fixing blocks 67 are slidably connected to the first guide groove 65 of the first support plate 61. The scale lines 610 are used to determine the bending radius of the grounded flat steel when the first support plate 61 and the second support plate 62 are arranged at 90°.

[0040] It should be noted that when the first support plate 61 and the second support plate 62 are in a horizontal state, the flat steel is inserted between the two fixed blocks 67, so that the flat steel is between the middle set of fixed rollers 5. At this time, the flat steel can be initially supported. Rotating the threaded rod 3 causes the lifting block 2 and the lower pressure roller 4 to descend and press the flat steel down to bend it. As needed, the straight flat steel can be bent into a curved shape. The first support plate 61 and the second support plate 62 both rotate around their respective fixed holes 63. The intermediate pin 64 is used to limit the angle of the first guide groove 65 and the second guide groove 66, so that the bending angle of the flat steel can be limited to the range of 90°-180°. Sharp angles, dead V-bends, and sharp right angles are prohibited. When necessary, the fixing block 67 can be moved along the first support plate 61. The connecting strip 68 between the fixing blocks 67 can define the straight segment at the bend of the flat steel. The bending radius of the flat steel can be determined based on the fact that both the first support plate 61 and the second support plate 62 are tangent to the flat steel, and the position of the lower pressure roller 4 relative to the flat steel. Similarly, the position of the straight segment at the bend can be determined by the scale line 610 of the first support plate 61 and the second support plate 62. In particular, the position and radius of the flat steel can be determined when the first support plate 61 and the second support plate 62 are arranged at 90°. The thickness of the flat steel needs to be adjusted by adjusting the distance between the connecting strip 68 and the first support plate 61 to ensure that flat steels of different thicknesses are pressed tightly at the connecting strip 68.

[0041] Please see Figure 2 , Figure 7 and Figure 8 As shown, centering components 7 are provided at the ends of the first support plate 61, the second support plate 62, and the lower pressure roller 4. The centering components 7 include limiting sleeves 71, which are welded to the top of the first support plate 61 and the top of the second support plate 62. The first support plate 61 and the second support plate 62 rotate relative to a fixed axis. The lower pressure roller 4 is fitted with a first limiting plate 73 and a second limiting plate 74, which are slidably connected along the lower pressure roller 4. The first support plate 61, the second support plate 62, the fixing hole 63, and the intermediate pin 64 are used to prevent the grounding flat steel from moving along the axis. The gap between the first limiting plate 73 and the second limiting plate 74 is aligned with the gap between the two limiting sleeves 71, thereby placing the flat steel at the gap between the two limiting sleeves 71 and the first limiting plate 73 and the second limiting plate 74, ensuring that the flat steel is located between the two limiting sleeves 71 and the first limiting plate 73 and the second limiting plate 74, and preventing the flat steel from deviating or detaching due to excessive width.

[0042] Please see Figure 7 and Figure 8As shown, the lower pressure roller 4 consists of two parts, allowing the first limiting plate 73, the second limiting plate 74, and the fixing studs 75 to be inserted between the two parts of the lower pressure roller 4. After the parts are installed, the two parts of the lower pressure roller 4 are welded together. Two fixing studs 75 are arranged along the axial direction of the lower pressure roller 4. Each fixing stud 75 has a first thread 76 and a second thread 77 on its outer surface, with the helical direction of the first thread 76 opposite to that of the second thread 77. The two ends of the fixing studs 75 are threadedly connected to the first limiting plate 73 and the second limiting plate 74, respectively. Rotating the fixing studs 75 allows... The first thread 76 and the second thread 77 are rotated, so that the first thread 76 and the second thread 77 rotate with each other, thereby ensuring that the first limiting plate 73 and the second limiting plate 74 move closer or further away from each other. The first limiting plate 73 and the second limiting plate 74 are used to clamp the grounding flat steel. The first limiting plate 73 and the second limiting plate 74 can limit the position of the flat steel while clamping it, thereby preventing the flat steel from deflecting on the lower pressure roller 4 and the middle set of fixed rollers 5.

[0043] Please see Figure 7 and Figure 8 As shown, the two ends of the fixing stud 75 are rotatably connected to the two end faces of the lower pressure roller 4, respectively. Threaded holes 78 are provided on the surface of the first limiting plate 73 and the surface of the second limiting plate 74. The threaded holes 78 are driven by the first thread 76 and the second thread 77. The first limiting plate 73 and the second limiting plate 74 intersect with the fixing stud 75. Thus, when the first thread 76 and the second thread 77 of the second limiting plate 74 intersect, the first limiting plate 73 and the second limiting plate 74 can move closer to each other or further away. The first limiting plate 73 and the second limiting plate 74 can limit the position of the flat steel.

[0044] Please see Figure 7 and Figure 8 As shown, both ends of the fixing stud 75 are provided with nuts, which are used to limit the axial movement of the fixing stud 75. One end of the fixing stud 75 is provided with an adjustment knob 72, which is used to rotate the fixing stud 75 and insert the fixing stud 75 into the two components of the lower pressure roller 4. The two ends of the fixing stud 75 are rotatably connected to the two end faces of the lower pressure roller 4, so as not to affect the free rotation of the fixing stud 75. The rotation of the fixing stud 75 can bring the first limiting plate 73 and the second limiting plate 74 closer or further apart.

[0045] It should be noted that when the flat steel is placed in the limiting sleeve 71 of one of the fixed roller groups 5, the limiting sleeve 71 can initially support the flat steel. Then, the lower pressure roller 4 descends, clamping the flat steel between the first limiting plate 73 and the second limiting plate 74. There is still a large gap between the first limiting plate 73 and the second limiting plate 74. At this time, the adjusting knob 72 can be rotated to make the fixing stud 75 rotate. The first thread 76 and the second thread 77 of the fixing stud 75 are respectively driven by the first limiting plate 73 and the second limiting plate 74, so that the first limiting plate 73 and the second limiting plate 74 move closer or further apart. This allows the position of the first limiting plate 73 and the second limiting plate 74 to be adjusted according to the width of the flat steel, which can prevent the flat steel from detaching from the first limiting plate 73 and the second limiting plate 74.

[0046] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A grounded flat steel bending device, comprising a bending machine body (1), a lifting block (2), a threaded rod (3), a lower pressure roller (4), and three sets of fixed roller groups (5), wherein the lifting block (2), the threaded rod (3), and the lower pressure roller (4) are located on the central axis of the bending machine body (1), the threaded rod (3) is used to lift the lifting block (2) and the lower pressure roller (4), and the three sets of fixed roller groups (5) are located on both sides of the central axis of the bending machine body (1), characterized in that, A support assembly (6) is provided between the middle set of fixed roller groups (5). The support assembly (6) includes a first support plate (61) and a second support plate (62). An intermediate pin (64) is provided at the intersection of the first support plate (61) and the second support plate (62).

2. The grounding flat steel bending device according to claim 1, characterized in that, The top of the first support plate (61) and the top of the second support plate (62) are set at the two fixed shafts of the middle set of fixed rollers (5). The first support plate (61) and the second support plate (62) are slidably connected to the intermediate pin (64). The intermediate pin (64) is located directly below the lower pressure roller (4). The first support plate (61) and the second support plate (62) are arranged at 90°-180°. The first support plate (61) and the second support plate (62) are used to support the bent flat steel at different angles. The ends of the first support plate (61) and the ends of the second support plate (62) are provided with fixing holes (63). The interior of the fixing hole (63) is transitionally fitted with the fixed shaft of the middle set of fixed rollers (5). The transitional fit between the fixing hole (63) and the fixed shaft of the middle set of fixed rollers (5) is used to rotate the fixing hole (63) and the middle set of fixed rollers (5) under external force. The rotation range of the first support plate (61) and the rotation range of the second support plate (62) intersect.

3. The grounding flat steel bending device according to claim 2, characterized in that, The first support plate (61) has a first guide groove (65) inside, and the second support plate (62) has a second guide groove (66) inside. The intermediate pin (64) is located inside the first guide groove (65) and the second guide groove (66). The width of the first guide groove (65) and the width of the second guide groove (66) are both adapted to the diameter of the intermediate pin (64). The interior of the first guide groove (65) and the interior of the second guide groove (66) are slidably connected to the intermediate pin (64).

4. The grounding flat steel bending device according to claim 3, characterized in that, When the first support plate (61) and the second support plate (62) are located in the middle set of fixed rollers (5), the first support plate (61) and the second support plate (62) are arranged at 90°, the intermediate pin (64) is located at the bottom end of the first guide groove (65) and the bottom end of the second guide groove (66), the first support plate (61) and the second support plate (62) are arranged at 180°, and the intermediate pin (64) is located at the top end of the first guide groove (65) and the top end of the second guide groove (66).

5. The grounding flat steel bending device according to claim 4, characterized in that, Two fixing blocks (67) are provided on the surface of the first support plate (61) and at the first guide groove (65). The two fixing blocks (67) are located inside the two sides of the first guide groove (65). A connecting strip (68) is connected between the two fixing blocks (67). Several connecting grooves (69) are opened on the side walls of the two fixing blocks (67). The connecting strip (68) is located inside one of the connecting grooves (69). Both ends of the connecting strip (68) are connected to the two fixing blocks (67) by connecting pins (612). The fixing blocks (67) are fixed to the first support plate (61) by bolts. The connecting strip (68) is used to press down the grounding flat steel of different thicknesses.

6. The grounding flat steel bending device according to claim 5, characterized in that, Both of the fixing blocks (67) have connecting holes (611) on their surfaces, and connecting pins (612) are located inside the connecting holes (611). The surfaces of the first support plate (61) and the second support plate (62) are both provided with scale lines (610). The two fixing blocks (67) are slidably connected to the first guide groove (65) of the first support plate (61).

7. A grounding flat steel bending device according to claim 6, characterized in that, A centering assembly (7) is provided at the end of the first support plate (61), the end of the second support plate (62), and the lower pressure roller (4). The centering assembly (7) includes a limiting sleeve (71), which is welded to the top of the first support plate (61) and the top of the second support plate (62). A first limiting plate (73) and a second limiting plate (74) are sleeved on the outside of the lower pressure roller (4). The first limiting plate (73) and the second limiting plate (74) are slidably connected along the lower pressure roller (4). The first support plate (61), the second support plate (62), the fixing hole (63), and the intermediate pin (64) are used to prevent the grounding flat steel from moving along the axis.

8. A grounding flat steel bending device according to claim 7, characterized in that, The lower pressure roller (4) consists of two parts. Two fixing studs (75) are arranged along the axial direction of the lower pressure roller (4). The two fixing studs (75) are provided with a first thread (76) and a second thread (77) on the outside. The spiral direction of the first thread (76) and the spiral direction of the second thread (77) are opposite. The two ends of the fixing studs (75) are threadedly connected to the first limiting plate (73) and the second limiting plate (74) respectively. The first limiting plate (73) and the second limiting plate (74) are close to or far from each other. The first limiting plate (73) and the second limiting plate (74) are used to clamp the grounding flat steel.

9. A grounding flat steel bending device according to claim 8, characterized in that, The two ends of the fixed stud (75) are rotatably connected to the two end faces of the lower pressure roller (4). The surface of the first limiting plate (73) and the surface of the second limiting plate (74) are provided with threaded holes (78). The threaded holes (78) are driven by the first thread (76) and the second thread (77).

10. A grounding flat steel bending device according to claim 9, characterized in that, Both ends of the fixing stud (75) are provided with nuts, which are used to limit the axial movement of the fixing stud (75). One end of the fixing stud (75) is provided with an adjustment knob (72), which is used to rotate the fixing stud (75).

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