A U-shaped hook bending machine

Abstract

The present invention belongs to the field of hardware processing, and in particular, relates to a U-shaped hook bending machine, comprising a support plate, a workbench fixedly arranged on one side of the support plate away from the support plate, characterized in that a stopper is rotatably arranged above the workbench, a shell is fixedly arranged above the workbench, a top block is slidably arranged inside the shell, a groove is provided on the side of the workbench away from the support plate, a first slide groove is provided inside the groove, sliding shells are slidably arranged at both ends of the first slide groove, a second slide groove is provided inside the sliding shell, a first positioning baffle is fixedly arranged at one end of the sliding shell extending out of the first slide groove, a sliding block is slidably arranged inside the sliding shell, and a second positioning baffle is fixedly arranged above the sliding block. The bending process in the U-shaped hook processing technology can be realized, the hole position deviation of the opening at the end of the U-shaped hook after bending can be reduced, and it is ensured that the rebound of the metal during the bending process does not affect the use quality of the hardware.

Description

Technical Field

[0001] The invention belongs to the field of hardware processing, and in particular relates to a U-shaped hook bending machine. Background Art

[0002] Nowadays, the process of processing U-shaped hooks is basically heating - flattening - punching - heating - flattening - punching - bending. The most critical process in this process is bending, because when bending the column iron with holes at both ends, it is necessary to ensure that the hole position deviation of the two ends after bending is not too large, otherwise the connecting bolts cannot penetrate into the holes. In addition, metal is very easy to rebound after bending. After bending and rebounding, the metal cannot directly meet the use standard, and the detection is also cumbersome. This U-shaped hook bending machine can effectively solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a U-shaped hook bending machine. The U-shaped hook bending machine can realize the bending processing in the U-shaped hook processing technology, and can reduce the hole position deviation of the opening at the end of the U-shaped hook after bending, ensuring that the rebound of the metal during the bending process does not affect the use quality of the hardware.

[0004] The objectives of the present invention can be achieved through the following technical solutions: a U-shaped hook bending machine, comprising a support plate, a plurality of support legs are fixedly arranged at the bottom of the support plate, a workbench is fixedly arranged on the side of the support plate away from the support legs, a stopper is rotatably arranged at the center position above the workbench, a shell is fixedly arranged on the side of the workbench away from the support plate, a top block for bending the column iron is slidably arranged inside the shell, a groove is provided on the side of the workbench away from the support plate, a first slide groove is provided inside the groove, sliding shells for assisting the bending of the two ends of the column iron are slidably arranged at both ends of the first slide groove, a second slide groove is provided inside the sliding shell, one end of the sliding shell extends out of the first slide groove, a first positioning baffle is fixedly arranged on the end of the sliding shell extending out of the first slide groove, a sliding block is slidably arranged inside the sliding shell, and a second positioning baffle is fixedly arranged on the end of the sliding block away from the support plate.

[0005] The cam is an angular channel formed between a pair of camshafts and a pair of camshafts, and the camshafts are connected along a channel that is camming with the movement of the second end of the camshaft.

[0006] Preferably, a sleeve is spirally arranged inside the support tube, an eccentric boss for aligning with the opening of the end face of the column iron is fixedly arranged at one end of the sleeve close to the first positioning baffle, a sliding cavity is arranged inside the sleeve, one end of the push rod penetrates into the sliding cavity, a spring is connected between the end of the push rod penetrating into the sliding cavity and the sleeve, at least one notch is opened on the circumferential surface of one end of the sleeve close to the boss, a rubber block is fixedly arranged inside each notch, and the rubber block is arranged on the side of the notch close to the boss. During the process of the sleeve rotating forward, the eccentric boss continuously rotates to adjust the position of the column iron so that its center position is aligned with the stopper.

[0007] Preferably, a third slider is slidably arranged inside the shell, the top block is fixedly arranged on the side of the third slider close to the stop block, the shell has an opening at the bottom, a connecting rod is fixedly arranged on the bottom of the third slider, a first hydraulic warehouse is fixedly arranged on the side of the connecting rod close to the stop block, a hydraulic cavity is opened inside the first hydraulic warehouse, a fourth slider is slidably and sealably arranged inside the hydraulic cavity, a push plate is fixedly arranged on the side of the fourth slider close to the connecting rod, and the push plate is fixedly connected to the connecting rod at one end away from the fourth slider.

[0008] Preferably, a hydraulic channel is fixedly provided on the side of the first hydraulic bin away from the connecting rod, two second hydraulic bins are fixedly provided inside the first slide slot, the hydraulic channel is interconnected with the two second hydraulic bins, an arc-shaped hydraulic cavity is opened inside each of the second hydraulic bins, a fifth slider is slidably provided inside each of the arc-shaped hydraulic cavity, an arc-shaped push rod is fixedly provided on the side of each of the fifth sliders away from the first hydraulic bin, one end of each of the arc-shaped push rods extends out of the arc-shaped hydraulic cavity, and one end of each of the arc-shaped push rods extending out of the arc-shaped hydraulic cavity is fixedly connected to the sliding block. The two arc-shaped push rods are pushed forward simultaneously to ensure that the hole position deviation at both ends of the column iron after bending is within the specified range.

[0009] Preferably, an elastic rubber is fixedly provided at one end of the sliding housing which penetrates into the first sliding groove.

[0010] Preferably, a cavity is provided at the bottom of the block, a driving motor is fixedly arranged inside the cavity, the output end of the driving motor is fixedly connected to the block, and notches are provided on both sides of the upper end of the block. After the block rotates, the stress of the stress-bearing part after the first bending is released, reducing the resilience of the column iron.

[0011] Preferably, a hydraulic pump capable of driving the third slider to slide is fixedly provided on the side of the shell away from the block, and a telescopic detection rod is slidably provided on the side of the first hydraulic compartment close to the connecting rod, one end of the telescopic detection rod penetrates into the interior of the first hydraulic compartment, and a detection device is fixedly provided on the end of the telescopic detection rod away from the first hydraulic compartment.

[0012] Preferably, a material discharge chute for unloading is provided on a side of the stopper away from the shell.

[0013] Beneficial effects:

[0014] 1. The present invention reduces the hole position deviation of the openings at both ends of the column iron during the bending process through the cooperation between the push rod on the sliding block and the support barrel on the sliding shell, which can improve the quality of product use.

[0015] 2. The present invention realizes the automatic unloading action of the bending machine through the cooperation between the rubber block on the sleeve and the push rod inside the sleeve, which can greatly save manpower and material resources.

[0016] 3. The present invention realizes the detection of the amount of metal rebound after bending through the cooperation of the sliding shell and the second hydraulic chamber, which can ensure that the production meets the standard requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereogram of the present invention;

[0018] Figure 2 It is the front view of the present invention;

[0019] Figure 3A top view of the present invention;

[0020] Figure 4 for Figure 2 Sectional view at AA in the middle;

[0021] Figure 5 for Figure 2 Sectional view at the middle BB;

[0022] Figure 6 for Figure 3 Sectional view at CC;

[0023] Figure 7 for Figure 4 A partial enlarged view of point D in the middle;

[0024] Figure 8 for Figure 5 A partial enlarged view of point E in the middle;

[0025] Fig. 9 for Figure 6 A partial enlarged view of point F in the middle;

[0026] Fig.10 Putting rod diagram;

[0027] Fig.11 Cross-sectional view of the push rod along the axial direction.

[0028] In the figure: support plate 11, support leg 12, workbench 10, block 17, housing 14, top block 15, groove 16, first slide groove 18, sliding housing 19, second slide groove 25, first positioning baffle 23, sliding block 26, second positioning baffle 22, positioning hole 24, support frame 30, support cylinder 29, push rod 32, through hole 27, rack 28, sleeve 33, eccentric boss 34, bearing 31, rotating housing 35, threaded sleeve 40, first gear 37, rotating shaft 39, first gear 38, second gear 39, second gear 31, second gear 38, second gear 39, first gear 39, second gear 31, first gear 38, second gear 39, first ... Second gear 38, synchronous belt 36, sliding cavity 41, spring 42, notch 43, rubber block 44, third slider 46, opening 47, connecting rod 48, first hydraulic bin 51, hydraulic cavity 52, fourth slider 50, push plate 49, hydraulic channel 55, second hydraulic bin 54, arc-shaped hydraulic cavity 55, fifth slider 56, arc-shaped push rod 57, elastic rubber 58, cavity 59, drive motor 60, notch 61, hydraulic pump 13, telescopic detection rod 21, detection device 62, and discharge chute 20. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] In the description of the present invention, it should be noted that the terms "inside", "below", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] Combined with Figure 1-11 A U-shaped hook bending machine comprises a support plate 11, a plurality of support legs 12 are fixedly arranged at the bottom of the support plate 11, a workbench 10 is fixedly arranged on the side of the support plate 11 away from the support legs 12, characterized in that a stopper 17 is rotatably arranged at the center position above the workbench 10, a shell 14 is fixedly arranged on the side of the workbench 10 away from the support plate 11, a top block 15 for bending the column iron is slidably arranged inside the shell 14, a groove 16 is opened on the side of the workbench 10 away from the support plate 11, a first slide groove 18 is opened inside the groove 16, sliding shells 19 for assisting the bending of the two ends of the column iron are slidably arranged at both ends of the first slide groove 18, a second slide groove 25 is opened inside the sliding shell 19, one end of the sliding shell 19 extends out of the first slide groove 18, and a first positioning baffle 23 is fixedly arranged on the end of the sliding shell extending out of the first slide groove 18, a sliding block 26 is slidably arranged inside the sliding shell 19, and a second positioning baffle 22 is fixedly arranged on the end of the sliding block 26 away from the support plate 11.

[0032] Furthermore, a positioning hole 24 with holes opened on both end surfaces of the positioning column iron is opened at the center position of the second positioning baffle 22, a support cylinder 29 is fixedly provided on the side of the positioning hole 24 away from the first positioning baffle 23, a push rod 32 is slidably provided inside the support cylinder 29, a support frame 30 is fixedly provided on the side of the second positioning baffle 22 away from the first positioning baffle 23, a bearing 31 is fixedly provided on the end of the support frame 30 away from the second positioning baffle 22, a rotating shell 35 is rotatably provided inside the bearing 31, one end of the push rod 32 penetrates into the rotating shell 35, and a threaded sleeve is fixedly provided on the end of the rotating shell 35 close to the second positioning baffle 22 40, one end of the push rod 32 extending out of the rotating housing 35 passes through the threaded sleeve 40, a through hole 27 is opened on the sliding block 26, a rack 28 is fixedly arranged inside the sliding housing 19, the rack 28 extends out of the through hole 27 at one end away from the sliding housing 19, a first gear 37 is rotatably arranged on the side of the rack 28 away from the support plate 11, a rotating shaft 39 is rotatably arranged on the side of the support frame 30 close to the second positioning baffle 22, a second gear 38 is fixedly arranged on the side of the rotating shaft 39 away from the support frame 30, the first gear 37 and the second gear 38 are meshed with each other for transmission, and the rotating shaft 39 and the rotating housing 35 are driven by a synchronous belt 36.

[0033] Furthermore, a sleeve 33 is spirally arranged inside the support cylinder 29, and an eccentric boss 34 for aligning with the opening of the column iron end face is fixedly arranged at one end of the sleeve 33 close to the first positioning baffle 23, a sliding cavity 41 is arranged inside the sleeve 33, one end of the push rod 32 extends into the sliding cavity 41, and a spring 42 is connected between the end of the push rod 32 extending into the sliding cavity 41 and the sleeve 33, and at least one notch 43 is opened on the circumferential surface of one end of the sleeve 33 close to the boss 34, and a rubber block 44 is fixedly arranged inside each notch 43, and the rubber block 44 is arranged on the side of the notch 43 close to the boss 34.

[0034] Furthermore, a third slider 46 is slidably arranged inside the shell 14, the top block 15 is fixedly arranged on the side of the third slider 46 close to the stopper 17, an opening 47 is opened at the bottom of the shell 14, a connecting rod 48 is fixedly arranged at the bottom of the third slider 46, a first hydraulic compartment 51 is fixedly arranged on the side of the connecting rod 48 close to the stopper 17, a hydraulic cavity 52 is opened inside the first hydraulic compartment 51, a fourth slider 50 is slidably and sealably arranged inside the hydraulic cavity 52, a push plate 49 is fixedly arranged on the side of the fourth slider 50 close to the connecting rod 48, and the push plate 49 is fixedly connected to the connecting rod 48 at one end away from the fourth slider 50.

[0035] Furthermore, a hydraulic channel 55 is fixedly provided on the side of the first hydraulic compartment 51 away from the connecting rod 48, two second hydraulic compartments 54 are fixedly provided inside the first slide groove 18, the hydraulic channel 55 is communicated with the two second hydraulic compartments 54, an arc-shaped hydraulic cavity 55 is opened inside each second hydraulic compartment 54, a fifth sliding block 56 is slidably provided inside each arc-shaped hydraulic cavity 55, an arc-shaped push rod 57 is fixedly provided on the side of each fifth sliding block 56 away from the first hydraulic compartment 51, one end of each arc-shaped push rod 57 extends out of the arc-shaped hydraulic cavity 55, and one end of each arc-shaped push rod 57 extending out of the arc-shaped hydraulic cavity 55 is fixedly connected to the sliding block 26.

[0036] Furthermore, an elastic rubber 58 is fixedly provided on one end of the sliding housing 19 that penetrates into the first sliding groove 18 .

[0037] Furthermore, a cavity 59 is formed at the bottom of the stopper 17 , a driving motor 60 is fixedly disposed inside the cavity 59 , an output end of the driving motor 60 is fixedly connected to the stopper 17 , and notches 61 are formed on both sides of the upper end of the stopper 17 .

[0038] Furthermore, a hydraulic pump 13 capable of driving the third slider 46 to slide is fixedly provided on the side of the shell 14 away from the block 17, and a telescopic detection rod 21 is slidably provided on the side of the first hydraulic chamber 51 close to the connecting rod 48. One end of the telescopic detection rod 21 penetrates into the interior of the first hydraulic chamber 51, and a detection device 62 is fixedly provided on the end of the telescopic detection rod 21 away from the first hydraulic chamber 51.

[0039] Furthermore, a material discharge chute 20 for discharging materials is provided on a side of the stopper 17 away from the housing 14 .

[0040] Working principle: When the U-shaped hook column iron needs to be bent, first put the two ends of the column iron into the first positioning baffle 23 and the second positioning baffle 22, and then start the hydraulic pump 13. The hydraulic pump 13 drives the third slider 46 to move forward, and at the same time, the top block 15 will push the column iron to one side of the block 17. When the third slider 46 moves forward, the connecting rod 48 connected to the third slider 46 is also driven, and the push plate 49 pushes the fourth slider 50 forward. The hydraulic oil in the hydraulic chamber 52 is withdrawn from the first hydraulic chamber 51, and the pushed hydraulic oil is divided into two ways through the hydraulic channel 53 and enters the two second hydraulic chambers 54. Under the pressure of the hydraulic oil, the fifth slider 56 in the arc hydraulic chamber 55 will be pushed forward, and the arc push rod 57 in the arc hydraulic chamber 55 will be pushed out of the arc hydraulic chamber 55. The sliding block 26 connected to the arc push rod 57 will slide inside the sliding housing 19 under the thrust.

[0041] During the sliding process of the sliding block 26, the distance between the first positioning baffle 23 and the second positioning baffle 22 is gradually shortened, and the flat surfaces at both ends of the column iron gradually become parallel to the two positioning baffles. When the first positioning baffle 23 and the second positioning baffle 22 gradually approach each other, the distance of the rack 28 extending from the through hole 27 gradually becomes longer, and at the same time, the rack 28 drives the first gear 37 to start rotating, and the transmission shaft 39 is driven to rotate under the meshing transmission of the second gear 38. Driven by the synchronous belt 36, the rotating housing 35 starts to drive the push rod 32 to rotate, and the push rod 32 starts to rotate forward under the action of the threaded sleeve 40 during the rotation process.

[0042] When the push rod 32 rotates forward, it will push the sleeve 33 to rotate synchronously under the action of the spring 42. During the forward rotation of the sleeve 33, the eccentric boss 34 will penetrate into the openings at both ends of the column iron through the positioning hole 24. As the sleeve 33 penetrates into the openings at both ends of the column iron, the openings at both ends of the column iron can be effectively positioned relatively, and the middle part of the column iron will hit the block 17, which can ensure that the hole position deviation of the openings at both ends of the column iron after bending is within the specified range. When the sleeve 33 is pushed into the openings at both ends of the column iron, the rubber block 44 will contact the hole wall and provide a certain resistance. The rubber block 44 can play a certain supporting role in the openings at both ends of the column iron, ensuring that the column iron itself will not rotate during the bending process.

[0043] When the sliding block 26 reaches the sliding limit position, the top block 15 starts to bend the column iron. During the bending process, the sliding housing 19 will also move in the first slide groove 18 along with the end of the column iron. After the column iron is bent to the maximum extent, the hydraulic pump 13 controls the third slider 46 to retreat a certain distance. During the retreat process, the bent column iron will rebound to a certain extent. The rebounding column iron will push the sliding block 26 back a certain distance, and the arc-shaped push rod 57 will be pushed back to the second hydraulic compartment 54 for a certain distance. A certain amount of hydraulic oil in the second hydraulic compartment 54 will be squeezed out of the second hydraulic compartment 54 and enter the first hydraulic compartment 51 through the hydraulic channel 55. The fourth slider 50 will retreat a certain distance under the action of pressure, and the telescopic detection rod 21 will be pushed back into the detection device 62. The retraction distance of the telescopic detection rod 21 can be used to determine whether the rebound amount of the column iron after bending meets the standard.

[0044] When the rebound amount of the column iron meets the production standard, the hydraulic pump 13 controls the third slider 46 to retreat to the initial position. During the retreat process, the sliding housing will be stuck inside the first slide groove 18 due to the elastic rubber 58 at the bottom of the sliding housing 19. When the third slider 46 retreats, the sliding block 26 will first start to slide relative to the sliding housing 19, the first positioning baffle 23 will gradually move away from the second positioning baffle 22, and the sleeve 33 will rotate and retract into the support cylinder 29. During the retraction process, due to the support of the rubber block 44 inside the openings at both ends of the column iron, the bent column iron will be rotated and lifted by the rubber block 44 on the sleeve 33 under the action of friction, and the lifted U-shaped column iron will fall into the feeding chute 20. As the retraction amount of the push rod 32 increases, the sleeve 33 extends out of the cast iron opening, and the U-shaped column iron will slide out of the working table 10 from the feeding chute 20. After the sliding block 26 slides to the limit position, the sliding housing 19 will also be brought to the initial position.

[0045] When the rebound amount of the column iron does not meet the production standard, the driving motor 60 drives the upper block 17 to rotate 90 degrees, rotates the plane to the middle position of the column iron, releases the stress generated by the arc surface of the clamping part, and the third slider 46 increases the forward distance, allowing the sliding shell 19 to perform auxiliary bending on the column iron, and then controls the hydraulic pump 13 to drive the top block 15 to perform secondary bending on the column iron. The secondary bending angle is relatively large compared to the first bending, and the angle of the column iron after excessive bending after rebound is closer to the production standard. After bending to meet the requirements, repeat the above-mentioned unloading action, restore the press brake to the initial action, and continue the operation.

[0046] The above descriptions are merely embodiments of the present invention, and are not intended to limit the patent protection scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A U-shaped hook bending machine, comprising a support plate (11), a plurality of support legs (12) are fixedly arranged at the bottom of the support plate (11), and a workbench (10) is fixedly arranged on the side of the support plate (11) away from the support legs (12), characterized in that: A stopper (17) is rotatably arranged at the center position above the workbench (10); a shell (14) is fixedly arranged on the side of the workbench (10) away from the support plate (11); a top block (15) for bending the column iron is slidably arranged inside the shell (14); a groove (16) is provided on the side of the workbench (10) away from the support plate (11); a first slide groove (18) is provided inside the groove (16); sliding shells (19) for assisting the bending of the two ends of the column iron are slidably arranged at both ends of the first slide groove (18); a second slide groove (25) is provided inside the sliding shell (19); one end of the sliding shell (19) extends out of the first slide groove (18); a first positioning baffle (23) is fixedly arranged on the end of the sliding shell extending out of the first slide groove (18); a sliding block (26) is slidably arranged inside the sliding shell (19); a second positioning baffle (22) is fixedly arranged on the end of the sliding block (26) away from the support plate (11); A third slider (46) is slidably arranged inside the housing (14), the top block (15) is fixedly arranged on the side of the third slider (46) close to the stopper (17), the housing (14) has an opening (47) at the bottom, a connecting rod (48) is fixedly arranged at the bottom of the third slider (46), a first hydraulic chamber (51) is fixedly arranged on the side of the connecting rod (48) close to the stopper (17), a hydraulic chamber (52) is opened inside the first hydraulic chamber (51), a fourth slider (50) is slidably and sealably arranged inside the hydraulic chamber (52), a push plate (49) is fixedly arranged on the side of the fourth slider (50) close to the connecting rod (48), and the push plate (49) is fixedly connected to the connecting rod (48) at one end away from the fourth slider (50); A hydraulic channel (55) is fixedly arranged on the side of the first hydraulic chamber (51) away from the connecting rod (48), two second hydraulic chambers (54) are fixedly arranged inside the first slide groove (18), the hydraulic channel (55) and the two second hydraulic chambers (54) are communicated with each other, each of the second hydraulic chambers (54) has an arc-shaped hydraulic cavity (55) inside, a fifth sliding block (56) is slidably arranged inside each of the arc-shaped hydraulic cavities (55), and an arc-shaped push rod (57) is fixedly arranged on the side of each of the fifth sliding blocks (56) away from the first hydraulic chamber (51), one end of each of the arc-shaped push rods (57) protrudes out of the arc-shaped hydraulic cavity (55), and one end of each of the arc-shaped push rods (57) protruding out of the arc-shaped hydraulic cavity (55) is fixedly connected to the sliding block (26); A hydraulic pump (13) capable of driving a third slider (46) to slide is fixedly arranged on a side of the housing (14) away from the stopper (17); a telescopic detection rod (21) is slidably arranged on a side of the first hydraulic chamber (51) close to the connecting rod (48); one end of the telescopic detection rod (21) penetrates into the interior of the first hydraulic chamber (51); and a detection device (62) is fixedly arranged on an end of the telescopic detection rod (21) away from the first hydraulic chamber (51); Whether the springback amount of the column iron after bending meets the standard can be judged by the retraction distance of the telescopic detection rod (21).

2. A U-shaped hook bending machine according to claim 1, characterized in that: A positioning hole (24) with holes opened on both end surfaces of the positioning column iron is formed at the center of the second positioning baffle (22); a support tube (29) is fixedly provided on the side of the positioning hole (24) away from the first positioning baffle (23); a push rod (32) is slidably provided inside the support tube (29); a support frame (30) is fixedly provided on the side of the second positioning baffle (22) away from the first positioning baffle (23); a bearing (31) is fixedly provided on one end of the support frame (30) away from the second positioning baffle (22); a rotating shell (35) is rotatably provided inside the bearing (31); one end of the push rod (32) penetrates into the rotating shell (35); a threaded sleeve (40) is fixedly provided on one end of the rotating shell (35) close to the second positioning baffle (22); and the push rod ( The sliding block (26) is provided with a through hole (27), a rack (28) is fixedly arranged inside the sliding housing (19), the rack (28) extends out of the through hole (27) at one end away from the sliding housing (19), a first gear (37) is rotatably arranged on the side of the rack (28) away from the support plate (11), a rotating shaft (39) is rotatably arranged on the side of the support frame (30) close to the second positioning baffle (22), a second gear (38) is fixedly arranged on the side of the rotating shaft (39) away from the support frame (30), the first gear (37) and the second gear (38) are meshed with each other for transmission, and the rotating shaft (39) and the rotating housing (35) are driven by a synchronous belt (36).

3. A U-shaped hook bending machine according to claim 2, characterized in that: A sleeve (33) is spirally arranged inside the support cylinder (29), and an eccentric boss (34) is fixedly arranged at one end of the sleeve (33) close to the first positioning baffle (23) for aligning with the opening of the column iron end face. A sliding cavity (41) is arranged inside the sleeve (33), and one end of the push rod (32) penetrates into the sliding cavity (41). A spring (42) is connected between the end of the push rod (32) penetrating into the sliding cavity (41) and the sleeve (33). At least one notch (43) is opened on the circumferential surface of one end of the sleeve (33) close to the boss (34), and a rubber block (44) is fixedly arranged inside each of the notches (43), and the rubber block (44) is arranged on the side of the notch (43) close to the boss (34).

4. A U-shaped hook bending machine according to claim 1, characterized in that: The sliding housing (19) is inserted into the first sliding groove (18) and one end thereof is fixedly provided with an elastic rubber (58).

5. The U-shaped hook bending machine according to claim 1, characterized in that: A cavity (59) is provided at the bottom of the stopper (17), a driving motor (60) is fixedly arranged inside the cavity (59), an output end of the driving motor (60) is fixedly connected to the stopper (17), and notches (61) are provided on both sides of the upper end of the stopper (17).

6. A U-shaped hook bending machine according to claim 1, characterized in that: A material discharge chute (20) for discharging materials is provided on a side of the stopper (17) away from the housing (14).

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