Bending-angle-adjustable bending machine for angle steel

Abstract

The bending machine is applied to the technical field of angle steel machining and comprises a bottom plate, a supporting frame is connected to the top of the bottom plate in a bolting mode, a hydraulic cylinder is connected to the top of the supporting frame in a bolting mode, and the output end of the hydraulic cylinder penetrates through the interior of the supporting frame and is connected with a fixing frame in a bolting mode. Bending dies are rotationally connected to the two sides of the interior of the fixed frame. The two bending dies are arranged at the bottom of the hydraulic cylinder, so that the two bending dies can synchronously move downwards to punch and bend the two sides of the angle steel at the top of the bending die plate. Therefore, the back of the angle steel is prevented from being stamped, and the smoothness of the back of the bent angle steel is improved. The first motor is started to drive the sliding rod to slide, so that the linear rack at the bottom of the sliding rod can be meshed with the disc gear to adjust the angle of the bending die. The angle steel can be bent into different angles through the bending die, meanwhile, the bending die can be conveniently adjusted, and the accuracy of the angle steel bending angle is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of angle steel processing, and in particular relates to a bending machine with adjustable bending angle for angle steel. Background Art

[0002] A bending machine is a machine that can bend thin plates. By bending the thin plates at a certain angle, the thin plates can be processed into angle steels.

[0003] At present, CN115815383B discloses a bending machine with adjustable angle. The technical problem is: to provide a bending machine with adjustable angle that integrates the two functions of adjusting the bending angle and the bending depth. The invention provides such an adjustable angle bending machine, including a bending frame, a bending frame, a cylinder, a bending part, etc. The cylinder is connected to the middle of the upper right part of the bending frame by bolts, and a bending part is provided on the left part of the telescopic rod of the cylinder. The bending part is composed of a bending telescopic block and a guide plate, and the guide plate is connected to the left end of the telescopic rod of the cylinder. The present invention adjusts the angle of the adjusting part by moving the sliding locking frame, and also drives the bending telescopic block of the bending part to perform telescopic adjustment by rotating the screw, and with the cooperation of the adjusting part, the bending depth can be adjusted, so that the effect of integrating the two functions of adjusting the bending angle and the bending depth can be achieved.

[0004] After the existing angle steel is processed and formed, part of the angle steel will be bent downward from the back according to the needs, so that the angle steel forms a V-shaped structure with a certain angle. However, the existing bending machine generally controls the punch die to punch downward from the middle of the back of the angle steel. This punching method will leave a punch mark on the back of the angle steel, causing the back of the angle steel to be uneven. In addition, this punching method mainly relies on the cylinder to drive the punch die to move downward. Therefore, the bending angle of the angle steel cannot be accurately controlled, affecting the processing quality of the angle steel. Summary of the invention

[0005] The object of the present invention is to provide a bending machine with adjustable bending angle for angle steel, which has the advantages of being easy to adjust the bending angle of the angle steel, preventing the back of the angle steel from being stamped out, and facilitating the taking and placing of the angle steel for bending processing, thereby improving safety.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a bending machine with adjustable bending angle for angle steel, comprising a base plate, a support frame bolted to the top of the base plate, a hydraulic cylinder bolted to the top of the support frame, an output end of the hydraulic cylinder passes through the interior of the support frame and is bolted to a fixed frame, bending molds are rotatably connected to both sides of the interior of the fixed frame, a first motor is bolted to one side of the exterior of the fixed frame, an output end of the first motor is bolted to a positive and negative threaded screw rotatably connected to the fixed frame, first threaded sleeves are threadedly sleeved on both sides of the surface of the positive and negative threaded screw, a sliding rod is welded to the bottom of the first threaded sleeve, a linear rack is bolted to both sides of the bottom of the sliding rod, and a disc gear meshing with the linear rack is fixedly sleeved on both sides of the bending mold.

[0007] By adopting the above technical solution, two bending dies are arranged at the bottom of the hydraulic cylinder, so that the two bending dies can move downward synchronously to stamp and bend the two sides of the angle steel at the top of the bending template. This prevents the back of the angle steel from being stamped out, and improves the smoothness of the back of the angle steel after bending. By turning on the first motor to drive the sliding rod to slide, the linear rack at the bottom of the sliding rod can mesh with the disc gear to adjust the angle of the bending die. Not only can the bending die bend the angle steel into different angles, but it is also convenient to adjust the bending die and improve the accuracy of the bending angle of the angle steel. The angle steel can be clamped from the top of the bending template by the upper triangular clamp and the lower triangular clamp, and rotated out so that the angle steel is not between the bending mold and the bending template. This makes it convenient for workers to remove and re-place the angle steel, without having to reach to the bottom of the bending mold to take the angle steel, thereby improving operational safety.

[0008] The present invention is further configured as follows: support pedestals are provided on the top and both sides of the base plate, a bending template used in conjunction with the bending mold is installed on the top of the support pedestal, both sides of the top of the base plate are bolted with fixed seats rotatably connected to the support pedestals, a telescopic rod bolted to the base plate is rotatably connected to the side of the bottom of the support pedestal away from the fixed seat, and a return spring fixedly connected to the base plate and the support pedestal is sleeved on the surface of the telescopic rod.

[0009] By adopting the above technical solution, after the hydraulic cylinder drives the bending die to slide upward and reset, the support base, the bending template and the angle steel on the top of the bending die can be reset by rotating on one side of the fixed seat under the rebound force of the reset spring.

[0010] The present invention is further configured as follows: a rotating column is rotatably connected to one side of the support frame, a telescopic cylinder is bolted to the side of the rotating column away from the bending template, a fixed block is bolted to the output end of the telescopic cylinder, a sliding block is slidably connected to the side of the fixed block away from the telescopic cylinder, a lower triangular clamping plate used in conjunction with the bending template is welded to one side of the fixed block, an upper triangular clamping plate slidably connected to the sliding block is arranged on the top of the lower triangular clamping plate, and a clamping spring fixedly connected to the top of the upper triangular clamping plate is bolted inside the sliding block.

[0011] By adopting the above technical solution, the telescopic cylinder is turned on to drive the fixed block and the sliding block to move forward, so that the lower triangular clamp plate can shovel up the angle steel through the gap between the angle steel and the bending template, and the elastic force of the clamping spring can push the upper triangular clamp plate to fit the top of the angle steel, so that the upper triangular clamp plate and the lower triangular clamp plate can clamp the angle steel and take it out.

[0012] The present invention is further configured as follows: a second motor is bolted to the top of the fixed block, an output end of the second motor is bolted to a threaded rod rotatably connected to the fixed block, and a second threaded sleeve is threadedly sleeved on the surface of the threaded rod and bolted to the sliding block.

[0013] By adopting the above technical solution, the second motor is turned on to drive the threaded rod to rotate and engage with the second threaded sleeve, thereby driving the sliding block to move downward to lift the angle steel, making it easier to move the angle steel.

[0014] The present invention is further configured as follows: a mounting bolt threadedly connected to the bottom of the support pedestal is threadedly connected to the bending template.

[0015] By adopting the above technical solution, the bending template is bolted to the surface of the supporting pedestal by installing bolts, so that it is convenient to replace the bending template when it is damaged.

[0016] The present invention is further configured as follows: a controller is bolted to one side of the top of the support frame.

[0017] By adopting the above technical solution, the electrical equipment of the bending machine is uniformly regulated and controlled by using a controller, thereby improving practicality.

[0018] The present invention is further configured such that a heat dissipation net is bolted to one side of the outside of the fixing frame close to the first motor and one side of the top of the fixing block close to the second motor.

[0019] The above technical solution is adopted to facilitate ventilation and heat dissipation of the motor, reduce dust from entering the interior, and improve working stability.

[0020] The present invention is further configured as follows: the upper triangular clamping plate and the lower triangular clamping plate are both provided with oblique notches for use in conjunction with the bending template on one side away from the sliding block.

[0021] By adopting the above technical solution, the upper triangular clamping plate and the lower triangular clamping plate can be extended into the upper and lower surfaces of one end of the angle steel to fit together, thereby clamping the angle steel.

[0022] The present invention is further configured such that: the surface of the rotating column is provided with anti-slip grooves.

[0023] By adopting the above technical solution, the friction force on the surface of the rotating column is improved, making it easier to rotate the rotating column and take out the angle steel.

[0024] In summary, the present invention has the following beneficial effects: By setting two bending dies at the bottom of the hydraulic cylinder, the two bending dies can move downward synchronously to punch and bend the two sides of the angle steel on the top of the bending template. This prevents the back of the angle steel from being punched out and improves the smoothness of the back of the angle steel after bending; By turning on the first motor to drive the sliding rod to slide, the linear rack at the bottom of the sliding rod can mesh with the disc gear to adjust the angle of the bending die. Not only can the bending die bend the angle steel into different angles, but it is also convenient to adjust the bending die and improve the accuracy of the bending angle of the angle steel.

[0025] The angle steel can be clamped from the top of the bending template by the upper triangular clamp and the lower triangular clamp, and rotated out so that the angle steel is not between the bending mold and the bending template. This makes it convenient for workers to remove and re-place the angle steel, without having to reach to the bottom of the bending mold to take the angle steel, improving operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a cross-sectional view of the structure of the present invention; Figure 3 It is a side structural sectional view of the present invention; Figure 4 The present invention Figure 2 A magnified view of point A in the figure; Figure 5 The present invention Figure 2 Enlarged view of point B in .

[0027] 1. Base plate; 2. Support frame; 3. Hydraulic cylinder; 4. Fixed frame; 5. First motor; 6. Positive and negative thread screws; 7. First threaded sleeve; 8. Sliding rod; 9. Bending mold; 10. Linear rack; 11. Disc gear; 12. Support pedestal; 13. Bending template; 14. Fixed seat; 15. Telescopic rod; 16. Return spring; 17. Rotating column; 18. Telescopic cylinder; 19. Fixed block; 20. Sliding block; 21. Upper triangular clamp; 22. Lower triangular clamp; 23. Clamping spring; 24. Second motor; 25. Threaded rod; 26. Second threaded sleeve; 27. Mounting bolt; 28. Controller; 29. ​​Heat dissipation net. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0029] Example 1: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5A bending machine with adjustable bending angle for angle steel comprises a base plate 1, a support frame 2 is bolted to the top of the base plate 1, a hydraulic cylinder 3 is bolted to the top of the support frame 2, an output end of the hydraulic cylinder 3 passes through the interior of the support frame 2 and is bolted to a fixed frame 4, bending molds 9 are rotatably connected to both sides of the interior of the fixed frame 4, a first motor 5 is bolted to one side of the exterior of the fixed frame 4, an output end of the first motor 5 is bolted to a positive and negative thread screw 6 rotatably connected to the fixed frame 4, first thread sleeves 7 are threadedly sleeved on both sides of the surface of the positive and negative thread screw 6, a sliding rod 8 is welded to the bottom of the first thread sleeve 7, a linear rack 10 is bolted to both sides of the bottom of the sliding rod 8, and a disc gear 11 meshing with the linear rack 10 is fixedly sleeved on both sides of the bending mold 9. A support base 12 is provided on the top and both sides of the base plate 1. A bending template 13 used in conjunction with the bending mold 9 is installed on the top of the support base 12. Fixed bases 14 rotatably connected to the support base 12 are bolted on both sides of the top of the base plate 1. A telescopic rod 15 bolted to the base plate 1 is rotatably connected to the side of the bottom of the support base 12 away from the fixed base 14. The surface of the telescopic rod 15 is sleeved with a return spring 16 fixedly connected to the base plate 1 and the support base 12 respectively. A rotating column 17 is rotatably connected to one side of the support frame 2. A telescopic cylinder 18 is bolted to the side of the rotating column 17 away from the bending template 13. A fixed block 19 is bolted to the output end of the telescopic cylinder 18. A sliding block 20 is slidably connected to the side of the fixed block 19 away from the telescopic cylinder 18. A lower triangular clamping plate 22 used in conjunction with the bending template 13 is welded to one side of the fixed block 19. An upper triangular clamping plate 21 slidably connected to the sliding block 20 is arranged on the top of the lower triangular clamping plate 22. A clamping spring 23 fixedly connected to the top of the upper triangular clamping plate 21 is bolted to the inside of the sliding block 20. A second motor 24 is bolted to the top of the fixed block 19. A threaded rod 25 rotatably connected to the fixed block 19 is bolted to the output end of the second motor 24. A second threaded sleeve 26 bolted to the sliding block 20 is threadedly sleeved on the surface of the threaded rod 25. A mounting bolt 27 bolted to the bending template 13 is threadedly connected to the bottom of the support pedestal 12. A controller 28 is bolted to one side of the top of the support frame 2. The side of the fixed frame 4 near the first motor 5 and the side of the top of the fixed block 19 near the second motor 24 are both bolted with a heat dissipation net 29. The upper triangular clamping plate 21 and the lower triangular clamping plate 22 are both provided with oblique slots for use with the bending template 13 on the side away from the sliding block 20. The surface of the rotating column 17 is provided with anti-slip grooves.

[0030] Example 2: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4A bending machine with adjustable bending angle for angle steel includes a bottom plate 1, a support frame 2 is bolted to the top of the bottom plate 1, a hydraulic cylinder 3 is bolted to the top of the support frame 2, the output end of the hydraulic cylinder 3 penetrates the interior of the support frame 2 and is bolted to a fixed frame 4, both sides of the interior of the fixed frame 4 are rotatably connected with a bending die 9, a first motor 5 is bolted to one side of the exterior of the fixed frame 4, the output end of the first motor 5 is bolted to a positive and negative threaded screw 6 rotatably connected to the fixed frame 4, both sides of the surface of the positive and negative threaded screw 6 are threadedly sleeved with a first threaded sleeve 7, a sliding rod 8 is welded to the bottom of the first threaded sleeve 7, both sides of the bottom of the sliding rod 8 are bolted to a linear rack 10, and both sides of the bending die 9 are fixedly sleeved with a disc gear 11 meshing with the linear rack 10. By arranging two bending dies 9 at the bottom of the hydraulic cylinder 3, the two bending dies 9 can be synchronously moved downward to perform stamping and bending on both sides of the angle steel at the top of the bending template 13. This prevents the back of the angle steel from being stamped out, and improves the smoothness of the back of the angle steel after bending. By turning on the first motor 5 to drive the sliding rod 8 to slide, the linear rack 10 at the bottom of the sliding rod 8 can mesh with the disc gear 11 to adjust the angle of the bending die 9. Not only can the bending die 9 bend the angle steel into different angles, but it is also convenient to adjust the bending die 9, thereby improving the accuracy of the bending angle of the angle steel.

[0031] refer to Figure 1 , Figure 2 , Figure 3 , support pedestals 12 are provided on the top and both sides of the bottom plate 1, a bending template 13 used in conjunction with the bending die 9 is installed on the top of the support pedestal 12, and fixed seats 14 rotatably connected to the support pedestal 12 are bolted to both sides of the top of the bottom plate 1, and a telescopic rod 15 bolted to the bottom plate 1 is rotatably connected to the side of the bottom of the support pedestal 12 away from the fixed seat 14, and a reset spring 16 is sleeved on the surface of the telescopic rod 15 and fixedly connected to the bottom plate 1 and the support pedestal 12 respectively. After the hydraulic cylinder 3 drives the bending die 9 to slide upward and reset, the support pedestal 12 and the bending template 13 and the angle steel on the top thereof can be reset after rotating on one side of the fixed seat 14 driven by the resilience of the reset spring 16.

[0032] refer to Figure 2 The bottom of the support pedestal 12 is threadedly connected with mounting bolts 27 that are bolted to the bending template 13. The bending template 13 is bolted to the support pedestal 12 surface by the mounting bolts 27, so that it is convenient to replace the bending template 13 when it is damaged.

[0033] refer to Figure 1 , Figure 2 A controller 28 is bolted to one side of the top of the support frame 2. The controller 28 is used to uniformly adjust and control the electrical equipment of the bending machine to improve practicality.

[0034] Brief description of the use process: By turning on the first motor 5, the positive and negative threaded screws 6 are rotated to engage with the first threaded sleeve 7, so that the sliding rod 8 is limited by the fixed frame 4, so that the two first threaded sleeves 7 drive the sliding rod 8 to slide closer to or away from each other inside the fixed frame 4. Then, during the sliding process, the sliding rod 8 uses the linear rack 10 at the bottom to engage with the disc gear 11, thereby driving the two bending molds 9 to rotate relative to each other at the bottom of the fixed frame 4, and then the angle of the bending mold 9 can be adjusted. After that, the fixed frame 4 is driven downward by turning on the hydraulic cylinder 3, so that the two bending molds 9 respectively stamp and bend the two sides of the angle steel at the top of the bending template 13, so that the support seat 12 is subjected to the pressure of the bending mold 9 to push the telescopic rod 15 and the return spring 16 to shrink and rotate on one side of the fixed seat 14, and the angle steel is bent to a corresponding angle according to the rotation angle of the bending mold 9. At the same time, after the hydraulic cylinder 3 drives the bending die 9 to slide upward and reset, the support base 12 and the bending template 13 and the angle steel on the top thereof can be rotated on one side of the fixed seat 14 by the resilience of the reset spring 16 and then reset.

[0035] Example 3: Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 A bending machine with adjustable bending angle for angle steel, a rotating column 17 is rotatably connected to one side of a support frame 2, a telescopic cylinder 18 is bolted to the side of the rotating column 17 away from the bending template 13, a fixed block 19 is bolted to the output end of the telescopic cylinder 18, a sliding block 20 is slidably connected to the side of the fixed block 19 away from the telescopic cylinder 18, a lower triangular clamping plate 22 used in conjunction with the bending template 13 is welded to one side of the fixed block 19, an upper triangular clamping plate 21 slidably connected to the sliding block 20 is arranged on the top of the lower triangular clamping plate 22, and a clamping spring 23 fixedly connected to the top of the upper triangular clamping plate 21 is bolted inside the sliding block 20. The angle steel can be clamped from the top of the bending template 13 by the upper triangular clamping plate 21 and the lower triangular clamping plate 22, and rotated out so that the angle steel is not between the bending mold 9 and the bending template 13. This makes it convenient for workers to remove and re-place the angle steel, without having to reach to the bottom of the bending mold 9 to take the angle steel, thereby improving the safety of operation.

[0036] refer to Figure 2 , Figure 4 The top of the fixed block 19 is bolted with a second motor 24, the output end of the second motor 24 is bolted with a threaded rod 25 rotatably connected to the fixed block 19, and the surface of the threaded rod 25 is threadedly sleeved with a second threaded sleeve 26 bolted to the sliding block 20. By turning on the second motor 24, the threaded rod 25 is driven to rotate and engage with the second threaded sleeve 26, thereby driving the sliding block 20 to move downward and lift the angle steel, so as to facilitate the movement of the angle steel.

[0037] refer to Figure 2 The side of the fixed frame 4 outside close to the first motor 5 and the side of the top of the fixed block 19 close to the second motor 24 are both bolted with a heat dissipation net 29. It is convenient to ventilate and dissipate heat for the motor, reduce dust from entering the interior, and improve working stability.

[0038] refer to Figure 1 , Figure 2 , Figure 3 The upper triangular clamping plate 21 and the lower triangular clamping plate 22 are provided with oblique slots for use with the bending template 13 on one side away from the sliding block 20. It is convenient for the upper triangular clamping plate 21 and the lower triangular clamping plate 22 to extend into the upper and lower surfaces of one end of the angle steel for fitting, thereby clamping the angle steel.

[0039] refer to Figure 1 The surface of the rotating column 17 is provided with anti-skid grooves to improve the friction force on the surface of the rotating column 17, so as to facilitate the rotation of the rotating column 17 to take out the angle steel.

[0040] Brief description of the use process: After the angle steel is stamped and bent into a certain angle, the bending template 13 will return to the horizontal position when it is reset. Since the angle steel is bent into a V-shape, a moving gap will be generated between the two ends and the parallel bending template 13. Then, the telescopic cylinder 18 is turned on to drive the fixed block 19 and the sliding block 20 to move forward, so that the lower triangular clamping plate 22 shovels up the angle steel through the gap between the angle steel and the bending template 13, and the upper triangular clamping plate 21 is pushed to fit with the top of the angle steel through the elastic force of the clamping spring 23, so that the upper triangular clamping plate 21 and the lower triangular clamping plate 22 clamp the angle steel. After that, the second motor 24 is turned on to drive the threaded rod 25 to rotate and engage with the second threaded sleeve 26, thereby driving the sliding block 20 to move downward to lift the angle steel. Finally, the telescopic cylinder 18 is turned on to drive the sliding block 20 to reset and pull the clamped angle steel from the top of the bending template 13 to one side, and the rotating column 17 is rotated to remove the angle steel from between the bending mold 9 and the bending template 13.

[0041] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A bending machine with adjustable bending angle for angle steel, comprising a bottom plate (1), characterized in that: The top of the base plate (1) is bolted to a support frame (2), the top of the support frame (2) is bolted to a hydraulic cylinder (3), the output end of the hydraulic cylinder (3) passes through the interior of the support frame (2) and is bolted to a fixed frame (4), both sides of the interior of the fixed frame (4) are rotatably connected to a bending mold (9), one side of the exterior of the fixed frame (4) is bolted to a first motor (5), the output end of the first motor (5) is bolted to a positive and negative threaded screw (6) rotatably connected to the fixed frame (4), both sides of the surface of the positive and negative threaded screw (6) are threadedly sleeved with a first threaded sleeve (7), a sliding rod (8) is welded to the bottom of the first threaded sleeve (7), both sides of the bottom of the sliding rod (8) are bolted to a linear rack (10), and both sides of the bending mold (9) are fixedly sleeved with a disc gear (11) meshing with the linear rack (10).

2. The bending machine with adjustable bending angle for angle steel according to claim 1, characterized in that: A support seat (12) is provided at the top and both sides of the base plate (1); a bending template (13) used in conjunction with the bending mold (9) is installed at the top of the support seat (12); both sides of the top of the base plate (1) are bolted with a fixed seat (14) rotatably connected to the support seat (12); a telescopic rod (15) bolted to the base plate (1) is rotatably connected to the side of the bottom of the support seat (12) away from the fixed seat (14); and a return spring (16) is sleeved on the surface of the telescopic rod (15) and is respectively fixedly connected to the base plate (1) and the support seat (12).

3. The bending machine with adjustable bending angle for angle steel according to claim 2, characterized in that: A rotating column (17) is rotatably connected to one side of the support frame (2); a telescopic cylinder (18) is bolted to the side of the rotating column (17) away from the bending template (13); a fixed block (19) is bolted to the output end of the telescopic cylinder (18); a sliding block (20) is slidably connected to the side of the fixed block (19) away from the telescopic cylinder (18); a lower triangular clamping plate (22) used in conjunction with the bending template (13) is welded to one side of the fixed block (19); an upper triangular clamping plate (21) slidably connected to the sliding block (20) is arranged on the top of the lower triangular clamping plate (22); a clamping spring (23) fixedly connected to the top of the upper triangular clamping plate (21) is bolted inside the sliding block (20).

4. The bending machine with adjustable bending angle for angle steel according to claim 3, characterized in that: A second motor (24) is bolted to the top of the fixed block (19); a threaded rod (25) rotatably connected to the fixed block (19) is bolted to the output end of the second motor (24); and a second threaded sleeve (26) bolted to the sliding block (20) is threadedly sleeved on the surface of the threaded rod (25).

5. The bending machine with adjustable bending angle for angle steel according to claim 2, characterized in that: A mounting bolt (27) is threadedly connected through the bottom of the support base (12) and is bolted to the bending template (13).

6. The bending machine with adjustable bending angle for angle steel according to claim 1, characterized in that: A controller (28) is bolted to one side of the top of the support frame (2).

7. The bending machine with adjustable bending angle for angle steel according to claim 4, characterized in that: A heat dissipation net (29) is bolted to a side of the outside of the fixing frame (4) close to the first motor (5) and a side of the top of the fixing block (19) close to the second motor (24).

8. The bending machine with adjustable bending angle for angle steel according to claim 3, characterized in that: The upper triangular clamping plate (21) and the lower triangular clamping plate (22) are both provided with oblique slots on the sides away from the sliding block (20) for use with the bending template (13).

9. The bending machine with adjustable bending angle for angle steel according to claim 3, characterized in that: The surface of the rotating column (17) is provided with anti-slip grooves.

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