A reinforcing bar bending apparatus

Abstract

The application belongs to the technical field of metal wire rope and its product manufacturing technology, in particular to a steel bar bending equipment, which comprises a machine body, a first hydraulic cylinder fixedly connected to the upper surface of the machine body, a push plate fixedly connected to the output end of the first hydraulic cylinder, a side plate fixedly connected to one side of the push plate, two connecting columns fixedly connected to the lower surface of the side plate, a same bottom plate fixedly connected to the bottom ends of the two connecting columns, a fixing plate fixedly connected to the output end of each connecting column, a rotating clamp block rotatably connected to the two sides of the fixing plate, the rotating clamp block being a starting clamp jaw, a fixed arc-shaped block fixedly connected to the upper surface of the machine body, and a blanking assembly arranged in the machine body, the blanking assembly comprising a blanking groove arranged in the machine body and a positioning frame slidably connected in the blanking groove. Through the arrangement of the blanking assembly, a feeding assembly and an auxiliary assembly, the problems of complicated steel bar feeding and discharging process and steel bar rebound are solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of metal wire rope and its product manufacturing, in particular to a steel bar bending equipment. BACKGROUND

[0002] In the process of continuous development of construction engineering, there are more and more requirements for the shape and size of steel bars. In the past, the efficiency of manual bending of steel bars was very low, and it was impossible to meet the progress of large-scale construction. Moreover, the quality of manual operation is unstable, and the bending precision is poor. With the continuous expansion of the scale of construction and the gradual improvement of technology, there is an urgent need for tools that can efficiently and accurately complete the steel bar bending operation. Steel bar bending equipment was born under such demand.

[0003] A patent with publication number CN107999665B discloses an intelligent steel bar bending machine, which comprises a bending table and a preheating box. The bottom of the bending table is fixedly connected with a table support, the inside of the table support is fixedly connected with a rotating shaft motor, the top four corners of the bending table are fixedly connected with a protective cover fixing shaft, the top of the protective cover fixing shaft is fixedly connected with a protective cover, the left side of the bending table is fixedly connected with a roller motor, and the upper side of the roller motor is movably connected with a roller. The preheating box is movably connected to the left side of the roller. The preheating box is a long rectangular box with an open top, and the preheating box is made of steel. A pile of fire is generated in the preheating box. The steel bar is preheated before entering the bending table. Then the roller sends the steel bar into the bending table for bending deformation.

[0004] However, in the actual use process of the existing steel bar bending equipment, due to the material characteristics of the steel bar, the steel bar is usually made of steel material, which has good elasticity and plasticity. When the steel bar is bent and deformed under external force, the internal grain structure will change, and stress will be generated. In the bending process, the steel bar is in the plastic deformation stage and will be bent according to the angle set by the equipment. However, once the external force is removed, that is, after the bending action is completed, the elastic stress accumulated in the steel bar will try to restore the original shape, resulting in springback phenomenon, which makes it difficult to achieve the precise preset value of the bending angle.

[0005] At the same time, the current steel bar bending process is complicated and completely depends on manual operation. The operator needs to accurately place the steel bar on the corresponding position of the equipment to ensure that the placement of the steel bar meets the bending requirements. Then start the equipment for bending operation. After the bending action is completed, the completed bending steel bar also needs to be taken off from the equipment. The whole process is not only low in efficiency, but also has certain error risk in manual operation, which further affects the precision and quality of the steel bar bending.

[0006] Therefore, the present application provides a steel bar bending equipment. SUMMARY

[0007] To make up for the deficiencies of the prior art, at least one technical problem raised in the background art is solved.

[0008] The technical scheme adopted by the present application to solve its technical problems is: a steel bar bending equipment, comprising a machine body, a first hydraulic cylinder is fixedly connected to the upper surface of the machine body, a push plate is fixedly connected to the output end of the first hydraulic cylinder, a side plate is fixedly connected to one side of the push plate, two connecting columns are fixedly connected to the lower surface of the side plate, a same bottom plate is fixedly connected to the bottom end of the two connecting columns, a fixing plate is fixedly connected to the output end of each connecting column, rotating clamping blocks are rotatably connected to the two sides of the fixing plate, the rotating clamping blocks are starting clamping jaws, a fixed arc block is also fixedly connected to the upper surface of the machine body, a blanking assembly is arranged in the machine body, the blanking assembly comprises a blanking groove opened in the machine body, a positioning frame is slidably connected in the blanking groove, a plurality of positioning springs are fixedly connected in the positioning frame, a same sealing plate is fixedly connected to the top end of the plurality of positioning springs, and an arc surface is arranged on the surface of the sealing plate.

[0009] A collecting frame is arranged in the machine body, and the collecting frame is used for collecting the bent steel bars.

[0010] Preferably, the blanking assembly further comprises a limiting groove opened in the bottom wall of the blanking groove, a limiting block is slidably connected in the limiting groove, a limiting spring is fixedly connected to one side of the limiting block, one end of the limiting spring is fixedly connected to the inner wall of the limiting groove, a horizontal plate is fixedly connected to the upper surface of the limiting block, two groups of compression springs are fixedly connected to the upper surface of the horizontal plate, a telescopic rod is arranged in the compression spring for limiting, a supporting plate is fixedly connected to the top end of the two compression springs, the positioning frame is fixedly connected to one end of the supporting plate, a taper rod is fixedly connected to the other end of the supporting plate, and a fixing frame is fixedly connected to the lower surface of the bottom plate.

[0011] Preferably, the cross section of the bottom plate is in a concave arc block shape, the bottom plate is matched with the fixed arc block, and the bottom plate is used for assisting the bending of the steel bar.

[0012] Preferably, when the steel bar is clamped by the rotating clamping blocks in the middle of the two connecting columns, the second hydraulic cylinder controls the pneumatic rotating clamping blocks to be retracted towards the connecting column, after the retraction abuts against the connecting column, the first hydraulic cylinder is started to drive the side plate to make the clamped steel bar close to the fixed arc block, so as to perform the bending work, while the bottom plate completes the bending work close to the arc block, the fixing frame on the lower surface of the bottom plate will extrude the taper rod, so that the taper rod moves downward, then the taper rod is inserted into the fixing frame, then the first hydraulic cylinder retracts the push plate, the fixing frame pulls the taper rod, and then drives the supporting plate, the telescopic rod, the horizontal plate and the sliding block to slide along the sliding groove, so that the positioning frame is separated from the blanking groove, the groove is opened, then the second hydraulic cylinder is started to control the rotating clamping blocks to move to the blanking groove, the bent steel bar is released, the steel bar falls along the blanking groove, and the steel bar is collected by the collecting frame.

[0013] Preferably, the limit spring fixed on one side of the sliding block is used for automatic resetting of the sealing plate, after the steel bar blanking is completed, the push plate continues to retract, after the limit spring is fully retracted, the fixed frame extrudes the taper rod again, the fixed frame is separated from the taper rod, and the push plate continues to retract, the limit spring is released, and the positioning frame is driven to move to the blanking notch again to seal the blanking notch.

[0014] Preferably, the upper surface of the machine body is further provided with a feeding assembly, the feeding assembly comprises a fixed box body fixed on the upper surface of the machine body, a rotating column is rotatably connected in the fixed box body, a feeding port is formed in the upper surface of the fixed box body, a plurality of grooves are formed in the circumferential surface of the rotating column, the diameter of the grooves is greater than that of the steel bar, and a placing frame is fixed to the lower surface of the fixed box body.

[0015] Preferably, the feeding assembly further comprises an auxiliary assembly arranged in the fixed box, the auxiliary assembly comprises a first cavity formed in the fixed box body, a third hydraulic cylinder is fixed to one side of the inner wall of the first cavity, a push block is fixed to the output end of the third hydraulic cylinder, and the push block is used for pre-bending the steel bar.

[0016] Preferably, the auxiliary assembly further comprises two arc-shaped plates fixed to one side of the inner wall of the first cavity, an auxiliary spring is fixed to the middle of the two arc-shaped plates, a top block is fixed to one end of the auxiliary spring, and an electric plate is slidably connected to the bottom wall of the first cavity, and the electric plate is electrically controlled by a sensor.

[0017] Preferably, the steel bar is placed into the feeding port, transferred through the rotating column, and falls onto the upper surface of the electric plate, at this time, the electric plate seals the inlet of the placing frame, then the third hydraulic cylinder is started, the third hydraulic cylinder drives the push block to move towards the top block after being started, the push block pushes the steel bar to move to the top block, extrudes the top block, after completely extruding the top block, the top block is spliced with the two arc-shaped plates to form a complete pre-processing shaping plate, the arc-shaped plates and the top block are both arc-shaped, after being extruded by the push plate, the steel bar is pre-bent along the arc of the arc-shaped plates and the top block, at the same time of completing the pre-bending, the electric plate retracts to the side close to the third hydraulic cylinder, the push block also retracts, and the top block pushes the pre-bent steel bar into the placing frame under the rebound of the auxiliary spring.

[0018] Preferably, the inner walls of the placing frame are both provided with sliding grooves, sliding plates are slidably connected in the sliding grooves, springs are fixed to the top ends of the sliding plates, the springs are fixed to the top walls of the sliding grooves, the bottom ends of the two sliding plates are fixed to a same placing plate, an inclined plate is fixed in the placing plate, a rotating shaft is rotatably connected to the bottom of the placing plate, a rotating plate is sleeved on the circumferential surface of the rotating shaft, and a groove between the placing plate, the rotating plate and the inclined plate is used for placing the pre-bent steel bar.

[0019] The beneficial effects of the present application are as follows:

[0020] 1. The steel bar bending equipment of the present application, through the steel bar bending link, first by the rotating clamp block accurately clamping the steel bar, the second hydraulic cylinder controls its retraction abuts, and then through the first hydraulic cylinder driving the side plate to make the steel bar close to the fixed arc block to complete the bending, the process is clear in division of labor and orderly operation, which guarantees the bending precision and stability, then in the blanking process, the bottom surface fixed frame of the bottom plate cooperates with the taper rod, and a series of linkage structures are used to realize the movement of the positioning frame, so as to accurately control the opening and closing of the blanking notch, the second hydraulic cylinder controls the rotating clamp block to move to the notch to release the steel bar, so that the steel bar can smoothly fall into the collection frame, the degree of automation is high, manual intervention is reduced, and the production efficiency is improved, in addition, the limiting spring on one side of the sliding block can realize the automatic resetting of the sealing plate after the steel bar blanking is completed, reseal the blanking notch, avoid foreign matter from entering, ensure the cleanliness of the equipment interior, at the same time, also prepare for the next blanking, prolong the service life of the equipment, and improve the reliability and continuity of the overall operation.

[0021] 2. The steel bar bending equipment of the present application, by splicing the top block and the arc plates on both sides into a complete pretreatment shaping plate, the arc plates and the top block are both curved, after the steel bar is extruded by the push plate, the steel bar is pre-bent along the curvature of the arc plate and the top block, and the pre-bending angle is 5°-10°, which makes good preparation for the subsequent accurate bending, improves the quality of finished products, and at the same time of completing the pre-bending, the electric plate is withdrawn to the side close to the third hydraulic cylinder, and the push block is also withdrawn, the top block pushes the pre-bent steel bar into the placing frame under the rebound of the auxiliary spring, the whole process is smooth and continuous, the degree of automation is high, the production efficiency is effectively improved, and the difficulty and error of manual operation are reduced; after the pre-bending treatment, the stress distribution inside the steel bar is adjusted and released to a certain extent, in the subsequent bending process, the steel bar can better adapt to deformation, the probability of defects such as cracks and fractures caused by stress concentration is reduced, and the integrity and strength of the steel bar are guaranteed.

[0022] 3. The steel bar bending equipment of the present application, when the pre-bent steel bar is pushed into the groove formed by the placing plate, the rotating plate and the inclined plate, the steel bar produces downward pressure, which drives the placing plate to press down, and then makes the sliding plate slide downward in the sliding groove, at this time, the spring at the top end of the sliding plate is stretched, the elastic potential energy of the spring increases, when the placing plate slides to the bottom end of the placing frame, the rotating plate receives the sensor signal and rotates, thereby releasing the pre-bent steel bar in the placing plate, at this time, the overall pressure of the placing plate disappears, the spring wants to restore to its original state, and will produce upward elastic force, pulling the sliding plate to slide upward, so that the placing plate returns to the initial position, at the same time, the placing plate cooperates with the inclined plate to better guide the bending direction of the pre-bent steel bar, which is convenient for the subsequent bending process, the bending angle is consistent, and the bending quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present application will be further described below in conjunction with the drawings.

[0024] Figure 1 is a perspective view of embodiment one of the present application;

[0025] Figure 2 is a front view of the body of the present application;

[0026] Figure 3 is a schematic view of the connection relationship structure of the rotating clamp block and the push plate of the present application;

[0027] Figure 4 is a sectional view of the body of the present application;

[0028] Figure 5 is an enlarged view of position A in the present application Figure 4

[0029] Figure 6 is an exploded view of the blanking assembly of the present application;

[0030] Figure 7 is a schematic view of the feeding assembly of the present application;

[0031] Figure 8 is a schematic view of the internal structure of the first cavity of the present application;

[0032] Figure 9 is a schematic view of the connection relationship structure of the placement frame and the placement plate of the present application;

[0033] In the figure: 1, body; 11, first hydraulic cylinder; 12, push plate; 13, collection frame; 14, fixed arc-shaped block; 15, side plate; 16, connecting column; 17, bottom plate; 18, second hydraulic cylinder; 19, fixed plate; 110, rotating clamp block; 111, fixed frame;

[0034] 2, fixed box body; 21, feeding port; 22, rotating column; 23, groove; 24, first cavity; 25, third hydraulic cylinder; 26, push block; 27, electric plate; 28, arc-shaped plate; 29, auxiliary spring; 210, top block; 211, placement frame; 212, sliding groove; 213, placement plate; 214, sliding plate; 215, spring; 216, inclined plate; 217, rotating shaft; 218, rotating plate;

[0035] 3, blanking groove; 31, limiting groove; 32, limiting block; 33, limiting spring; 34, horizontal plate; 35, telescopic rod; 36, compression spring; 37, supporting plate; 38, taper rod; 39, positioning frame; 310, positioning spring; 311, sealing plate. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0037] ​Embodiment one: as shown in Figures 1 to 9 The body 1 is internally provided with a collecting frame 13, and the collecting frame 13 is used for collecting the bent steel bars.

[0038] Specifically, in the actual use process of the existing steel bar bending equipment, due to the material characteristics of the steel bar, the steel bar is usually made of steel material, and the steel material has good elasticity and plasticity. When the steel bar is bent and deformed under external force, the internal grain structure will change, and stress will be generated. In the bending process, the steel bar is in the plastic deformation stage and will be bent according to the angle set by the equipment. However, once the external force is removed, that is, after the bending action is completed, the elastic stress accumulated in the steel bar will prompt the steel bar to try to restore to its original shape, thereby producing a rebound phenomenon, which makes it difficult to achieve a precise preset value of the bending angle.

[0039] At the same time, the current steel bar bending work flow is relatively complicated and completely depends on manual operation of the operator. The operator needs to accurately place the steel bar on the corresponding position of the equipment to ensure that the placement of the steel bar meets the bending requirements, and then starts the equipment for bending operation. After the bending action is completed, the completed bent steel bar also needs to be taken off from the equipment. The whole process is not only low in efficiency, but also has a certain error risk in manual operation, which further affects the precision and quality of the steel bar bending.

[0040] Therefore, the present application sets the above structure according to the above-mentioned problems. First, the steel to be bent is placed between the two rotating clamping blocks 110, and the rotating clamping blocks 110 are started to stably clamp the steel, and then the first hydraulic cylinder 11 is started, the output end of which pushes the push plate 12, and then drives the side plate 15, the connecting column 16 and the bottom plate 17 to move towards the fixed arc block 14. Because the bottom plate 17 is concave arc block-shaped in cross section, it can cooperate with the fixed arc block 14 to bend the steel during pushing. At the same time of bending, the blanking assembly is passively started during the retreat of the push plate 12, the positioning frame 39 driven by the blanking assembly slides in the blanking groove 3, the positioning spring 310 pushes the sealing plate 311 to separate from the mouth of the blanking groove 3, and the surface arc design facilitates the sealing plate 311 to retract into the positioning frame 39. Then the positioning frame 39 moves into the cavity of the blanking groove 3 to realize automatic blanking of the steel. Finally, the bent steel falls into the collecting frame 13 inside the machine body 1 to complete the whole bending and collecting process.

[0041] By adopting hydraulic drive, the quality of steel bending can be guaranteed. The adaptive design of the fixed arc block 14 and the bottom plate 17 can make the steel bending work more accurate. The auxiliary fixation of the rotating clamping block 110 can effectively prevent the steel from deviating during bending and improve the qualified rate of finished products. The setting of the blanking assembly and the collecting frame 13 realizes automatic blanking and collecting of the bent steel, reduces manual operation, improves production efficiency, reduces labor intensity, and is suitable for large-scale steel bending operation.

[0042] As shown in Figure 3 The blanking assembly of the present embodiment further comprises a limiting groove 31 opened in the bottom wall of the blanking groove 3, a limiting block 32 is slidably connected in the limiting groove 31, a limiting spring 33 is fixedly connected to one side of the limiting block 32, one end of the limiting spring 33 is fixedly connected to the inner wall of the limiting groove 31, a horizontal plate 34 is fixedly connected to the upper surface of the limiting block 32, two groups of compression springs 36 are fixedly connected to the upper surface of the horizontal plate 34, a telescopic rod 35 is arranged inside the compression spring 36 for limiting, a supporting plate 37 is fixedly connected to the top end of the two compression springs 36, a positioning frame 39 is fixedly connected to one end of the supporting plate 37, a taper rod 38 is fixedly connected to the other end of the supporting plate 37, and a fixed frame 111 is fixedly connected to the lower surface of the bottom plate 17.

[0043] Specifically, when the steel bar is clamped by the rotating clamp block 110 in the middle of the connecting column 16, the second hydraulic cylinder 18 controls the pneumatic rotating clamp block 110 to retract towards the connecting column 16, and after retraction to abut against the connecting column 16, the first hydraulic cylinder 11 is started to drive the side plate 15 to drive the clamped steel bar to approach the fixed arc block 14, so as to perform the bending work. At the same time that the bottom plate 17 approaches the arc block to complete the bending work, the fixed frame 111 on the lower surface of the bottom plate 17 will extrude the taper rod 38, so that the taper rod 38 moves downward, and then the taper rod 38 is inserted into the fixed frame 111. Then the first hydraulic cylinder 11 retracts the push plate 12, the fixed frame 111 pulls the taper rod 38, thereby driving the supporting plate 37, the telescopic rod 35, the horizontal plate 34 and the sliding block to slide along the sliding groove 212, so that the positioning frame 39 is separated from the discharge slot 3, so that the slot is opened. Then the second hydraulic cylinder 18 is started to control the rotating clamp block 110 to move to the discharge slot 3, release the bent steel bar, and the steel bar falls along the discharge slot 3 and is collected by the collecting frame 13.

[0044] In addition, the limiting spring 33 fixed on one side of the sliding block is used for automatic resetting of the sealing plate 311. After the steel bar is discharged, the push plate 12 is continuously retracted, the limiting spring 33 is retracted, the fixed frame 111 extrudes the taper rod 38 again, the fixed frame 111 is separated from the taper rod 38, and the limiting spring 33 is released to drive the positioning frame 39 to move to the discharge slot 3 again to seal the discharge slot 3.

[0045] Through the steel bar bending link, the steel bar is first accurately clamped by the rotating clamp block 110, the second hydraulic cylinder 18 controls it to retract and abut, and then the first hydraulic cylinder 11 drives the side plate 15 to make the steel bar approach the fixed arc block 14 to complete the bending. The process is clear in division of labor and orderly in operation, which guarantees the accuracy and stability of the bending. Then in the discharging process, the fixed frame 111 on the lower surface of the bottom plate 17 cooperates with the taper rod 38, and a series of linkage structures are used to realize the movement of the positioning frame 39, so as to accurately control the opening and closing of the discharge slot 3. The second hydraulic cylinder 18 controls the rotating clamp block 110 to move to the slot to release the steel bar, so that the steel bar can smoothly fall into the collecting frame 13. The degree of automation is high, manual intervention is reduced, production efficiency is improved. In addition, the limiting spring 33 on one side of the sliding block can realize automatic resetting of the sealing plate 311 after the steel bar is discharged, reseal the discharge slot 3, prevent foreign matter from entering, ensure the cleanliness of the inside of the equipment, and also prepare for the next discharging, prolong the service life of the equipment, and improve the reliability and continuity of the overall operation.

[0046] Embodiment two: as Figures 1 to 9As shown, the comparative example one, wherein another embodiment of the application is: the upper surface of the body 1 is also provided with a feeding assembly, the feeding assembly includes a fixed box body 2 fixed on the upper surface of the body 1, the inside of the fixed box body 2 is rotatably connected with a rotating column 22, the upper surface of the fixed box body 2 is provided with a feeding port 21, a plurality of grooves 23 are opened on the circumference of the rotating column 22, the diameter of the groove 23 is larger than that of the reinforcing bar, the lower surface of the fixed box body 2 is fixedly connected with a placing frame 211;

[0047] The feeding assembly further comprises an auxiliary assembly arranged in the fixed box, the auxiliary assembly comprises a first cavity 24 opened in the fixed box body 2, a third hydraulic cylinder 25 is fixedly connected to one side of the inner wall of the first cavity 24, a push block 26 is fixedly connected to the output end of the third hydraulic cylinder 25, and the push block 26 is used for pre-bending the reinforcing bar;

[0048] The auxiliary assembly further comprises two arc-shaped plates 28 fixedly connected to one side of the inner wall of the first cavity 24, an auxiliary spring 29 is fixedly connected to the middle part of the two arc-shaped plates 28, one end of the auxiliary spring 29 is fixedly connected with a top block 210, and the bottom wall of the first cavity 24 is further slidably connected with an electric plate 27, and the electric plate 27 is electrically controlled by a sensor.

[0049] Specifically, the reinforcing bar is put into the feeding port 21, transferred by the rotating column 22, and falls onto the upper surface of the electric plate 27, at this time the electric plate 27 seals the inlet of the placing frame 211, then the third hydraulic cylinder 25 is started, after the third hydraulic cylinder 25 is started, the push block 26 is driven to move towards the top block 210, the push block 26 will push the reinforcing bar to move to the top block 210, and the top block 210 is extruded, after the top block 210 is completely extruded, the top block 210 is spliced with the two arc-shaped plates 28 to form a complete pre-processing shaping plate, the arc-shaped plates 28 and the top block 210 are both arc-shaped, after being extruded by the push plate 12, the reinforcing bar is pre-bent along the arc of the arc-shaped plates 28 and the top block 210, and the pre-bending angle is 5°-10°, which makes good preparation for subsequent precise bending, improves the quality of finished products, and at the same time of completing the pre-bending, the electric plate 27 is withdrawn to the side close to the third hydraulic cylinder 25, the push block 26 is also withdrawn, and the top block 210 pushes the pre-bent reinforcing bar into the placing frame 211 under the rebound of the auxiliary spring 29, the whole process is coherent and smooth, the degree of automation is high, the production efficiency is effectively improved, and the difficulty and error of manual operation are reduced;

[0050] After the pre-bending treatment, the stress distribution inside the reinforcing bar is adjusted and released to a certain extent, in the subsequent bending process, the reinforcing bar can better adapt to deformation, the probability of defects such as cracks and fractures caused by stress concentration is reduced, and the integrity and strength of the reinforcing bar are ensured.

[0051] As Figure 9As shown, the inner wall of the placement frame 211 is provided with a sliding groove 212 on both sides, a sliding plate 214 is slidably connected in the sliding groove 212, a spring 215 is fixedly connected to the top end of the sliding plate 214, the spring 215 is fixedly connected to the top wall of the sliding groove 212, the bottom ends of the two sliding plates 214 are fixedly connected to the same placement plate 213, the inside of the placement plate 213 is fixedly connected to an inclined plate 216, and the bottom of the placement plate 213 is rotatably connected to a rotating shaft 217. A rotating plate 218 is sleeved on the circumferential surface of the rotating shaft 217, and the groove between the placement plate 213, the rotating plate 218 and the inclined plate 216 is used for placing the pre-bent reinforcing steel bar.

[0052] Specifically, when the pre-bent reinforcing steel bar is pushed into the groove formed by the placement plate 213, the rotating plate 218 and the inclined plate 216, the reinforcing steel bar generates a downward pressure, which drives the placement plate 213 to press downward, and then drives the sliding plate 214 to slide downward in the sliding groove 212. At this time, the spring 215 at the top end of the sliding plate 214 is stretched, and the elastic potential energy of the spring 215 increases. When the placement plate 213 slides to the bottom end of the placement frame 211, the rotating plate 218 is subjected to a sensor signal and rotates to release the pre-bent reinforcing steel bar in the placement plate 213. At this time, the overall pressure of the placement plate 213 disappears, and the spring 215 returns to its original state and generates an upward elastic force to pull the sliding plate 214 to slide upward, so that the placement plate 213 returns to the initial position. At the same time, the placement plate 213 cooperates with the inclined plate 216 to better guide the bending direction of the pre-bent reinforcing steel bar, so that the bending angle is consistent in the subsequent bending process, and the bending quality is improved.

[0053] The working principle is that first, the reinforcing steel bar is placed from the feeding port 21, is transferred by the rotating column 22, and falls onto the upper surface of the electric plate 27. At this time, the electric plate 27 seals the inlet of the placement frame 211. Then, the third hydraulic cylinder 25 is started. After the third hydraulic cylinder 25 is started, the push block 26 is driven to move close to the top block 210. The push block 26 will push the reinforcing steel bar to move to the top block 210 and press the top block 210. After completely pressing the top block 210, the top block 210 is spliced with the arc-shaped plates 28 on both sides to form a complete pre-processing shaping plate. The arc-shaped plates 28 and the top block 210 both have an arc. After being pressed by the push plate 12, the reinforcing steel bar is pre-bent along the arc of the arc-shaped plates 28 and the top block 210. The pre-bending angle is 5°-10°, which makes a good preparation for the subsequent precise bending and improves the quality of finished products. At the same time of completing the pre-bending, the electric plate 27 is withdrawn to the side close to the third hydraulic cylinder 25, and the push block 26 is also withdrawn. The top block 210 pushes the pre-bent reinforcing steel bar into the placement frame 211 under the rebound of the auxiliary spring 29. The whole process is smooth and continuous, has high automation, effectively improves the production efficiency, and reduces the difficulty and error of manual operation.

[0054] After the pre-bending treatment, the stress distribution inside the steel bar is adjusted and released to some extent, and in the subsequent bending process, the steel bar can better adapt to deformation, reducing the probability of defects such as cracks and fractures caused by stress concentration, and ensuring the integrity and strength of the steel bar;

[0055] When the pre-bent steel bar is pushed into the groove formed by the placement plate 213, the rotating plate 218 and the inclined plate 216, the steel bar generates a downward pressure, which drives the placement plate 213 to press down, and in turn causes the sliding plate 214 to slide downward in the sliding groove 212. At this time, the spring 215 at the top end of the sliding plate 214 is stretched, and the elastic potential energy of the spring 215 increases. When the placement plate 213 slides to the bottom end of the placement frame 211, the rotating plate 218 receives the sensor signal and rotates, releasing the steel bar to be bent between the two rotating clamping blocks 110. Then the first hydraulic cylinder 11 is started, its output end pushes the push plate 12, and in turn drives the side plate 15, the connecting column 16 and the bottom plate 17 to move towards the fixed arc block 14. Because the bottom plate 17 is in the shape of a concave arc block in cross section, it can cooperate with the fixed arc block 14 to bend the steel bar during the pushing process;

[0056] At the same time of bending, the blanking assembly is passively started during the retreat of the push plate 12. The fixed frame 111 on the lower surface of the bottom plate 17 will squeeze the taper rod 38, causing the taper rod 38 to move downward. Then the taper rod 38 is inserted into the fixed frame 111. Then the first hydraulic cylinder 11 retracts the push plate 12, the fixed frame 111 pulls the taper rod 38, and in turn drives the support plate 37, the telescopic rod 35, the horizontal plate 34 and the sliding block to slide along the sliding groove 212, so that the positioning frame 39 is separated from the blanking slot 3, and the slot is opened. Then the second hydraulic cylinder 18 is started to control the rotating clamping block 110 to move to the blanking slot 3, releasing the bent steel bar. The steel bar falls along the blanking slot 3 and is collected by the collection frame 13;

[0057] In addition, the limiting spring 33 fixed on one side of the sliding block is used for automatic resetting of the sealing plate 311. After the steel bar is blanked, the push plate 12 is continued to be withdrawn. After the limiting spring 33 is fully contracted, the fixed frame 111 squeezes the taper rod 38 again, the fixed frame 111 is separated from the taper rod 38, and the withdrawal is continued. The limiting spring 33 is released, driving the positioning frame 39 to move to the blanking slot 3 again to seal the blanking slot 3. Finally, the bent steel bar falls into the collection frame 13 inside the machine body 1, completing the entire bending and collecting process;

[0058] Through the steel bar bending link, first, the rotating clamp block 110 accurately clamps the steel bar, the second hydraulic cylinder 18 controls its retraction abutment, and then the first hydraulic cylinder 11 drives the side plate 15 to make the steel bar close to the fixed arc block 14 to complete the bending, the process is clear in division of labor, the operation is orderly, which guarantees the bending precision and stability, then in the blanking process, the bottom plate 17 lower surface fixed frame 111 is matched with the taper rod 38, and a series of linkage structures are used to realize the movement of the positioning frame 39, so as to accurately control the opening and closing of the blanking groove 3, the second hydraulic cylinder 18 controls the rotating clamp block 110 to move to the groove to release the steel bar, so that the steel bar can smoothly fall into the collecting frame 13, the degree of automation is high, the manual intervention is reduced, and the production efficiency is improved, in addition, the limiting spring 33 on one side of the sliding block can realize the automatic reset of the sealing plate 311 after the steel bar blanking is completed, reseal the blanking groove 3, avoid the sundries into, ensure the internal cleanliness of the equipment, at the same time, also prepare for the next blanking, prolong the service life of the equipment, improve the overall operation reliability and continuity.

[0059] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A steel bending equipment, comprising a machine body (1), a first hydraulic cylinder (11) fixed to the upper surface of the machine body (1), a push plate (12) fixed to the output end of the first hydraulic cylinder (11), a side plate (15) fixed to one side of the push plate (12), two connecting columns (16) fixed to the lower surface of the side plate (15), a same bottom plate (17) fixed to the bottom ends of the two connecting columns (16), a second hydraulic cylinder (18) arranged on each connecting column (16), a fixed plate (19) fixed to the output end of each second hydraulic cylinder (18), a rotary clamping block (110) rotatably connected to the two sides of the fixed plate (19), the rotary clamping block (110) being a pneumatic clamping jaw, and a fixed arc block (14) fixed to the upper surface of the machine body (1), characterized in that: a blanking assembly is arranged in the machine body (1), the blanking assembly comprising a blanking groove (3) formed in the machine body (1), a positioning frame (39) slidably connected in the blanking groove (3), a plurality of positioning springs (310) fixed in the positioning frame (39), a same sealing plate (311) fixed to the top ends of the plurality of positioning springs (310), and an arc surface formed on the surface of the sealing plate (311); a collecting frame (13) is arranged in the machine body (1), the collecting frame (13) being used for collecting the bent steel bars; the blanking assembly further comprises a limiting groove (31) formed in the bottom wall of the blanking groove (3), a limiting block (32) slidably connected in the limiting groove (31), a limiting spring (33) fixed to one side of the limiting block (32), one end of the limiting spring (33) being fixed to the inner wall of the limiting groove (31), a horizontal plate (34) fixed to the upper surface of the limiting block (32), two groups of compression springs (36) fixed to the upper surface of the horizontal plate (34), a telescopic rod (35) arranged in the compression spring (36) for limiting, a support plate (37) fixed to the top ends of the two groups of compression springs (36), the positioning frame (39) fixed to one end of the support plate (37), and a taper rod (38) fixed to the other end of the support plate (37), and a fixed frame (111) fixed to the lower surface of the bottom plate (17).

2. A reinforcing bar bending apparatus according to claim 1, wherein: The cross section of the bottom plate (17) is in the shape of a concave arc block, the bottom plate (17) is matched with the fixed arc block (14), and the bottom plate (17) is used for assisting the bending of the steel bar.

3. A reinforcing bar bending apparatus according to claim 1, wherein: An upper feeding assembly is further arranged on the upper surface of the machine body (1), the upper feeding assembly comprising a fixed box body (2) fixed to the upper surface of the machine body (1), a rotating column (22) rotatably connected in the fixed box body (2), an inlet (21) formed in the upper surface of the fixed box body (2), a plurality of grooves (23) formed in the circumferential surface of the rotating column (22), the diameters of the grooves (23) being greater than the diameter of the steel bar, and a placing frame (211) fixed to the lower surface of the fixed box body (2).

4. A reinforcing bar bending apparatus according to claim 3, wherein: The upper feeding assembly further comprises an auxiliary assembly arranged in the fixed box body (2), the auxiliary assembly comprises a first cavity (24) opened in the fixed box body (2), a third hydraulic cylinder (25) is fixedly connected to one side of the inner wall of the first cavity (24), a push block (26) is fixedly connected to the output end of the third hydraulic cylinder (25), and the push block (26) is used for pre-bending of the reinforcing steel bars.

5. A reinforcing bar bending apparatus according to claim 4, wherein: The auxiliary assembly further comprises two arc-shaped plates (28) fixedly connected to one side of the inner wall of the first cavity (24), an auxiliary spring (29) is fixedly connected to the middle portion of the two arc-shaped plates (28), one end of the auxiliary spring (29) is fixedly connected with a top block (210), the bottom wall of the first cavity (24) is further slidably connected with an electric plate (27), and the electric plate (27) is electrically controlled by a sensor.

6. A reinforcing bar bending apparatus according to claim 3, wherein: The inner wall of the placing frame (211) is provided with a sliding groove (212) on both sides, the sliding groove (212) is slidably connected with a sliding plate (214), one end of the sliding plate (214) is fixedly connected with a spring (215), the spring (215) is fixedly connected with the top wall of the sliding groove (212), the bottom end of the two sliding plates (214) is fixedly connected with the same placing plate (213), the placing plate (213) is fixedly connected with an inclined plate (216) inside, the bottom of the placing plate (213) is rotatably connected with a rotating shaft (217), the rotating shaft (217) is sleeved with a rotating plate (218) on the circumferential surface, and the groove between the placing plate (213), the rotating plate (218) and the inclined plate (216) is used for placing the pre-bent reinforcing steel bars.

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