Steel bar straightening device for construction machinery

Abstract

The utility model belongs to the field of building machinery, and particularly relates to a reinforcing steel bar straightening device for building machinery, which comprises a reinforcing steel bar straightening machine body. A first U-shaped plate is fixedly connected to the top of the steel bar straightening machine body. The middle part of the first U-shaped plate is rotationally connected with a plurality of groups of first rotating shafts; one end of each first rotating shaft is fixedly connected with a groove straightening disc. The other end of each first rotating shaft is connected with a first servo motor; through the effect of the cutting tool, the reinforcing steel bar straightening machine body can straighten and cut off reinforcing steel bars at the same time, so that the step that the reinforcing steel bars need to be cut through other tools after being straightened is omitted, and the effects of improving the production efficiency and shortening the working time are achieved; and meanwhile, a groove chuck is driven by a second servo motor to rotate by a circle to cut off the reinforcing steel bars, the lengths of the reinforcing steel bars cut off by the cutting tool can be uniform, and therefore a worker can conveniently conduct follow-up arrangement and transportation work on the reinforcing steel bars.

Description

Technical Field

[0001] The utility model relates to the field of construction machinery, in particular to a steel bar straightening device for construction machinery. Background Art

[0002] Rebar refers to steel used for reinforced concrete and prestressed reinforced concrete. Its cross-section is usually circular. Rebar is widely used in the construction field because it can improve the tensile strength and bearing capacity of concrete, making concrete more solid and durable.

[0003] If bending or misalignment occurs during the use of steel bars, it will easily affect the stability of the steel bars and have an adverse effect on the structure of the building. Therefore, a steel bar straightening machine is generally used to straighten the bent steel bars to improve the strength and ductility of the steel bars.

[0004] Usually, after using a straightening machine to straighten the steel bars, it is necessary to use a cutting machine to cut the steel bars according to actual usage and transportation conditions. However, this undoubtedly increases the work steps and leads to reduced production efficiency. Therefore, a steel bar straightening device for construction machinery is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the utility model provides a steel bar straightening device for construction machinery.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the utility model describes a steel bar straightening device for construction machinery, comprising a steel bar straightening machine body; a first U-shaped plate is fixedly connected to the top of the steel bar straightening machine body; a plurality of first rotating shafts are rotatably connected to the middle of the first U-shaped plate; a groove straightening disk is fixedly connected to one end of the first rotating shaft; a first servo motor is connected to the other end of the first rotating shaft; a second U-shaped plate is fixedly connected to the top of the steel bar straightening machine body; a second rotating shaft is rotatably connected to the middle of the second U-shaped plate; a second servo motor is connected to the end of the second rotating shaft; a groove chuck is fixedly connected to the middle of the second rotating shaft; support plates are connected to both sides of the groove chuck; the middle of the support plates are connected to the first tension spring; the ends of the first tension spring are connected to cutting tools; the middle of the cutting tool is connected to a connecting shaft; and limited cylinders are fixedly connected to both sides of the second U-shaped plate.

[0007] Preferably, a U-shaped groove is opened on one side of the steel bar straightening machine body; a horizontal axis is connected to the middle of the U-shaped groove; a first triangular plate is rotatably connected to the middle of the horizontal axis; a plurality of groups of second tension springs are connected to the middle of the first triangular plate; and a second triangular plate is fixedly connected to the inner wall of one side of the steel bar straightening machine body.

[0008] Preferably, an exhaust fan is connected to the side of the steel bar straightening machine body; a cross support frame is fixedly connected to the middle of the exhaust fan; a third rotating shaft is rotatably connected to the middle of the cross support frame; and a plurality of fan blades are fixedly connected to the middle of the third rotating shaft.

[0009] Preferably, the side of the steel bar straightening machine body is rotatably connected to a machine door; the side of the machine door is connected to a plurality of sets of leaves; the side of the machine door is fixedly connected to a handle; and a glass observation panel is provided in the middle of the machine door.

[0010] Preferably, a plurality of groups of pillars are fixedly connected to the top of the steel bar straightening machine body; and the ends of the pillars are all fixedly connected to U-shaped conveying plates.

[0011] Preferably, a valve plate is connected to the end of the exhaust fan.

[0012] Preferably, a first arc-shaped limit plate is connected to the bottom of the first servo motor; and a second arc-shaped limit plate is connected to the bottom of the second servo motor.

[0013] The utility model is beneficial in that:

[0014] 1. The utility model discloses a steel bar straightening device for construction machinery. Through the action of the cutting tool, the steel bar straightening machine body can straighten the steel bar and cut it at the same time, thereby eliminating the need to cut the steel bar with the help of other tools after it is straightened. This improves production efficiency and shortens working hours. At the same time, the second servo motor drives the groove chuck to rotate one circle to cut the steel bar, so that the length of the steel bar cut by the cutting tool is more uniform, which is convenient for the staff to carry out subsequent sorting and transportation of the steel bar.

[0015] 2. The utility model discloses a steel bar straightening device for construction machinery, which can effectively collect the steel bars in a unified manner, thereby preventing the steel bars from being scattered around after being straightened and cut. The cross axis and the second tension spring cooperate with each other and can be in a closed state when there are no steel bars on the surface of the first triangular plate, thereby reducing the possibility of external dust and impurities floating into the interior of the steel bar straightening machine body, causing contamination of the steel bars. The second triangular plate can be used to make the fallen steel bars roll deep into the interior of the steel bar straightening machine body, thereby preventing the steel bars from being easily accumulated in only one place, resulting in a reduction in the collection space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic cross-sectional structural diagram of the first triangular plate in the utility model;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the groove straightening disk in the utility model;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the groove chuck in the utility model;

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of the groove chuck in the utility model;

[0022] Figure 6 It is a schematic diagram of the cross-sectional structure of the exhaust fan in the present utility model.

[0023] In the figure: 1. Steel bar straightening machine body; 11. First U-shaped plate; 12. First rotating shaft; 13. Grooved straightening disk; 14. First servo motor; 15. Second U-shaped plate; 16. Second rotating shaft; 17. Second servo motor; 18. Grooved chuck; 19. Support plate; 111. First tension spring; 112. Cutting tool; 113. Connecting shaft; 114. Limiting cylinder; 2. U-shaped groove; 21. Horizontal axis; 22. First triangular plate; 23. Second tension spring; 24. Second triangular plate; 3. Exhaust fan; 31. Cross support frame; 32. Third rotating shaft; 33. Fan blade; 4. Machine door; 41. Hinge; 42. Handle; 43. Glass observation plate; 5. Pillar; 51. U-shaped conveying plate; 6. Valve plate; 7. First arc limiting plate; 71. Second arc limiting plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative labor are within the scope of protection of the utility model.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a steel bar straightening device for construction machinery comprises a steel bar straightening machine body 1; a first U-shaped plate 11 is fixedly connected to the top of the steel bar straightening machine body 1; a plurality of first rotating shafts 12 are rotatably connected in the middle of the first U-shaped plate 11; a groove straightening disk 13 is fixedly connected to one end of each of the first rotating shafts 12; a first servo motor 14 is connected to the other end of each of the first rotating shafts 12; a second U-shaped plate 15 is fixedly connected to the top of the steel bar straightening machine body 1; a second rotating shaft 16 is rotatably connected in the middle of the second U-shaped plate 15; a second servo motor 17 is connected to the end of the second rotating shaft 16; a groove chuck 18 is fixedly connected in the middle of the second rotating shaft 16 ; Both sides of the groove chuck 18 are connected to support plates 19; The middle of the support plate 19 is connected to a first tension spring 111; The ends of the first tension spring 111 are connected to a cutting tool 112; The middle of the cutting tool 112 is connected to a connecting shaft 113; Both sides of the second U-shaped plate 15 are fixedly connected to a limited cylinder 114; When working, first insert the steel bar into the clamping groove position in the middle of the two sets of groove straightening disks 13, and then make the two sets of first servo motors 14 work at the same time, so as to drive the two sets of first rotating shafts 12 to rotate in one forward direction and the other reverse direction, and at the same time, the groove straightening disk 13 will be driven by the first rotating shaft 12 to rotate continuously The second servo motor 17 can be operated to drive the second rotating shaft 16 to rotate, and the rotation of the second rotating shaft 16 will drive the groove chuck 18 to rotate. When the groove chuck 18 rotates, it will drive the support plate 19, the first tension spring 111 and the cutting tool 112 to rotate. When the cutting tool 112 rotates to the limiting cylinder 114, the cutting tool 112 will be affected by the extrusion force brought by the limiting cylinder 114 and move toward the middle of the groove chuck 18, so that the two sets of cutting tools 112 can be The ends are aligned, and the straightened steel bars are sheared after being moved forward to the groove of the groove chuck 18. This step is achieved through the action of the cutting tool 112, so that the steel bar straightening machine body 1 can straighten the steel bars and cut them at the same time, thereby eliminating the step of cutting the steel bars with the help of other tools after they are straightened, thereby improving production efficiency and shortening working hours. At the same time, the groove chuck 18 is driven by the second servo motor 17 to rotate one circle to cut the steel bars, so that the length of the steel bars cut by the cutting tool 112 can be more uniform, which can facilitate the staff to carry out subsequent sorting and transportation of the steel bars.

[0026] like Figure 1 , Figure 2As shown, a U-shaped groove 2 is provided on one side of the steel bar straightening machine body 1; a horizontal axis 21 is connected to the middle of the U-shaped groove 2; a first triangular plate 22 is rotatably connected to the middle of the horizontal axis 21; a plurality of second tension springs 23 are connected to the middle of the first triangular plate 22; a second triangular plate 24 is fixedly connected to the inner wall of one side of the steel bar straightening machine body 1; during operation, the shortened steel bar will fall to the surface of the first triangular plate 22, at which time the steel bar will roll to the second tension spring 23 under the influence of the triangular design of the first triangular plate 22, and the first triangular plate 22 will rotate in the middle of the horizontal axis 21 under the action of gravity, thereby driving the second tension spring 23 to stretch, so that the end position of the first triangular plate 22 can be moved downward, causing the steel bar at the first triangular plate 22 to be stretched. The steel bar rolls down to the second triangular plate 24, and then the steel bar will continue to roll into the inside of the steel bar straightening machine body 1 under the influence of the triangular design of the second triangular plate 24. This step is to effectively collect the steel bars in a unified manner, thereby preventing the steel bars from being scattered around after being straightened and cut. Through the cooperation of the transverse axis 21 and the second tension spring 23, the first triangular plate 22 can be in a closed state when there is no steel bar on the surface, thereby reducing the external dust and impurities from easily floating into the inside of the steel bar straightening machine body 1, causing pollution to the steel bars. Through the action of the second triangular plate 24, the fallen steel bars can roll deep into the inside of the steel bar straightening machine body 1, thereby preventing the steel bars from being easily accumulated in only one place, resulting in a situation where the collection space is reduced.

[0027] like Figure 1 , Figure 2 , Figure 6 As shown, an exhaust fan 3 is connected to the side of the steel bar straightening machine body 1; a cross support frame 31 is fixedly connected to the middle of the exhaust fan 3; a third rotating shaft 32 is rotatably connected to the middle of the cross support frame 31; a plurality of fan blades 33 are fixedly connected to the middle of the third rotating shaft 32; when working, before straightening the steel bar, in order to make the straightening work faster and more effective, it is generally heated to soften the steel bar. However, when the stretched and cut steel bars are accumulated inside the steel bar straightening machine body 1, the heat is not easy to dissipate well. At this time, the third rotating shaft 32 can be rotated to drive the fan blades 33 to rotate to form a certain wind force, so that the exhaust fan 3 can ventilate and cool the inside of the steel bar straightening machine body 1. In this step, the steel bars inside the steel bar straightening machine body 1 can be air-cooled through the exhaust fan 3, thereby slowing down the thermal motion between the steel bar atoms and making the lattice structure more compact after cooling, thereby increasing the strength and hardness of the steel bar.

[0028] like Figure 1As shown, the side of the rebar straightening machine body 1 is rotatably connected to a machine door 4; the side of the machine door 4 is connected to a plurality of sets of hinges 41; the side of the machine door 4 is fixedly connected to a handle 42; the middle of the machine door 4 is provided with a glass observation panel 43; during operation, when it is necessary to take out the steel bars collected inside the rebar straightening machine body 1, the handle 42 can be first grasped and pulled, and at this time, the machine door 4 will expand outward under the action of the hinge 41, so that the machine door 4 can be opened and the steel bars can be taken out through the machine door 4. In this step, the opening of the machine door 4 can facilitate the staff to take out the steel bars, and the opening of the glass observation panel 43 can facilitate the staff to observe the accumulation of the steel bars inside the rebar straightening machine body 1 and determine when they need to be taken out.

[0029] like Figure 1 , Figure 2 As shown, a plurality of groups of pillars 5 are fixedly connected to the top of the steel bar straightening machine body 1; the ends of the pillars 5 are fixedly connected to a U-shaped conveying plate 51; when working, the pillars 5 support the U-shaped conveying plate 51, and when the groove straightening disk 13 straightens the steel bar and pushes it toward the groove clamping disk 18, the steel bar will first enter the middle of the U-shaped conveying plate 51, and push the steel bar from the U-shaped conveying plate 51 to the groove clamping disk 18. This step can assist the end of the steel bar to enter the inside of the groove clamping disk 18 through the action of the U-shaped conveying plate 51, thereby preventing the end of the steel bar from drooping easily when passing through the groove straightening disk 13 due to the influence of gravity, thereby affecting the situation in which the steel bar accurately enters the middle of the groove clamping disk 18 for shearing.

[0030] like Figure 1 , Figure 6 As shown, the end of the exhaust fan 3 is connected to a valve plate 6; when the exhaust fan 3 is working, the wind force it generates will flow through the valve plate 6. At this time, the valve plate 6 will expand outward under the influence of wind pressure, so that the wind force can be smoothly discharged to the outside, and when the exhaust fan 3 is not working, the valve plate 6 will be in a closed state. This step can reduce the dust and impurities from the outside that may float into the inside of the steel bar straightening machine body 1 through the exhaust fan 3 when the exhaust fan 3 is not working, thereby causing pollution to the steel bars collected inside the steel bar straightening machine body 1.

[0031] like Figure 1 , Figure 2 , Figure 3As shown, a first arc-shaped limit plate 7 is connected to the bottom of the first servo motor 14; a second arc-shaped limit plate 71 is connected to the bottom of the second servo motor 17; during operation, when the first servo motor 14 and the second servo motor 17 are working, a certain degree of jitter will be generated. At this time, the first arc-shaped limit plate 7 and the second arc-shaped limit plate 71 can protect the first servo motor 14 and the second servo motor 17 and reduce their jitter. This step can reduce the second servo motor 17 and the first servo motor 14 through the first arc-shaped limit plate 7 and the second arc-shaped limit plate 71. The jitter may affect the rotation rate of the groove straightening disk 13 and the groove clamping disk 18, thereby affecting the accuracy of the groove straightening disk 13 in straightening the steel bars.

[0032] Working principle: during operation, the steel bar is first inserted into the clamping groove position in the middle of the two groups of groove straightening disks 13, and then the two groups of first servo motors 14 are operated at the same time, thereby driving the two groups of first rotating shafts 12 to rotate in a forward direction and a reverse direction. At the same time, the groove straightening disk 13 will rotate in different directions driven by the first rotating shaft 12, so that the steel bar in the clamping groove can be straightened by the pressure while being moved forward by the thrust of rotation. At this time, the second servo motor 17 can be operated to drive the second rotating shaft 16 to rotate. The rotation of the second rotating shaft 16 will drive the groove chuck 18 to rotate. When the groove chuck 18 rotates, it will drive the support plate 19, the first tension spring 111 and the cutting tool 112 to rotate. When the cutting tool 11 When the cutting tool 112 rotates to the position of the limiting cylinder 114, the cutting tool 112 will be affected by the squeezing force brought by the limiting cylinder 114 and move closer to the middle of the groove chuck 18, so that the ends of the two sets of cutting tools 112 can be aligned, and the straightened steel bar moved forward to the groove of the groove chuck 18 can be cut. In this step, the cutting tool 112 can be used to make the steel bar straightening machine body 1 straighten and cut the steel bar at the same time, thereby eliminating the need to use other tools to cut the steel bar after it is straightened, which has the effect of improving production efficiency and shortening working time. At the same time, the second servo motor 17 drives the groove chuck 18 to rotate one circle to cut the steel bar, so that the length of the steel bar cut by the cutting tool 112 is more uniform. First, it is convenient for the staff to carry out subsequent sorting and transportation of the steel bars. During work, the shortened steel bars will fall to the surface of the first triangular plate 22. At this time, the steel bars will roll to the second tension spring 23 under the influence of the triangular design of the first triangular plate 22. The first triangular plate 22 will rotate in the middle of the horizontal axis 21 under the action of gravity, thereby driving the second tension spring 23 to stretch, so that the end position of the first triangular plate 22 can be moved downward, causing the steel bars at the first triangular plate 22 to roll to the second triangular plate 24. Then, under the influence of the triangular design of the second triangular plate 24, the steel bars will continue to roll into the inside of the steel bar straightening machine body 1. This step is to effectively collect the steel bars in a unified manner, thereby preventing the steel bars from being scattered everywhere after being straightened and cut. Through the cooperation between the transverse axis 21 and the second tension spring 23, the first triangular plate 22 can be in a closed state when there is no steel bar on the surface, thereby reducing the dust and impurities from the outside from easily floating into the interior of the steel bar straightening machine body 1, causing pollution to the steel bars. Through the action of the second triangular plate 24, the fallen steel bars can roll deep into the interior of the steel bar straightening machine body 1, thereby preventing the steel bars from easily accumulating in only one place, resulting in a situation where the collection space is reduced. During operation, before straightening the steel bars, in order to make the straightening work faster and more effective, they are generally heated to soften the steel bars. However, when the stretched and cut steel bars are accumulated in the interior of the steel bar straightening machine body 1, the heat is not easy to dissipate well. At this time, they can be rotated by the third rotating shaft 32.This drives the fan blades 33 to rotate, thereby forming a certain wind force, so that the exhaust fan 3 can ventilate and cool the inside of the steel bar straightening machine body 1. In this step, the steel bars inside the steel bar straightening machine body 1 can be air-cooled by the exhaust fan 3, so that the thermal motion between the steel bar atoms is slowed down, and the lattice structure is more compact after cooling, thereby increasing the strength and hardness of the steel bars. During operation, when it is necessary to take out the steel bars collected inside the steel bar straightening machine body 1, the handle 42 can be held and pulled. At this time, the machine door 4 will expand outwards under the action of the hinge 41, so that the machine door 4 can be opened and the steel bars can be taken out through the machine door 4. In this step, the opening of the machine door 4 can facilitate the staff to take the steel bars, and the opening of the glass observation plate 43 can facilitate the staff to observe the accumulation of steel bars inside the steel bar straightening machine body 1 and judge when they need to be taken. During operation, the support 5 supports the U-shaped conveying plate 51. When the groove straightening plate 13 straightens the steel bar and pushes it to the groove clamping plate 18, the steel bar will first enter the middle of the U-shaped conveying plate 51, and push the steel bar from the U-shaped conveying plate 51 to the groove clamping plate 18. This step can assist the end of the steel bar to enter the inside of the groove clamping plate 18 through the function of the U-shaped conveying plate 51. The effect is to prevent the end of the steel bar from drooping easily when passing through the groove straightening disk 13 due to the influence of gravity, thereby affecting the steel bar from accurately entering the middle of the groove clamping disk 18 for shearing. When working, when the exhaust fan 3 is working, the wind force it forms will flow through the valve plate 6. At this time, the valve plate 6 will expand outward under the influence of wind pressure, so that the wind force can be smoothly discharged to the outside world, and when the exhaust fan 3 is not working, the valve plate 6 will be in a closed state. This step can reduce the dust and impurities from the outside from floating into the inside of the steel bar straightening machine body 1 through the exhaust fan 3 when the exhaust fan 3 is not working, thereby preventing the steel bar from being damaged. The steel bars collected inside the straightening machine body 1 may cause pollution. When the first servo motor 14 and the second servo motor 17 are working, they may generate certain vibrations. At this time, the first arc-shaped limit plate 7 and the second arc-shaped limit plate 71 can protect the first servo motor 14 and the second servo motor 17 and reduce their vibrations. This step can reduce the vibrations of the second servo motor 17 and the first servo motor 14, which may affect the rotation rate of the groove straightening disk 13 and the groove clamping disk 18, thereby affecting the accuracy of the groove straightening disk 13 in straightening the steel bars.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A steel bar straightening device for construction machinery, comprising a steel bar straightening machine body (1); a first U-shaped plate (11) is fixedly connected to the top of the steel bar straightening machine body (1); the characteristics are: The first U-shaped plate (11) is rotatably connected to a plurality of first rotating shafts (12) at the middle; one end of each of the first rotating shafts (12) is fixedly connected to a groove straightening disk (13); the other end of each of the first rotating shafts (12) is connected to a first servo motor (14); a second U-shaped plate (15) is fixedly connected to the top of the steel bar straightening machine body (1); the second U-shaped plate (15) is rotatably connected to a second rotating shaft (16) at the middle; the end of the second rotating shaft (16) is connected to a second servo motor (17); a groove chuck (18) is fixedly connected to the middle of the second rotating shaft (16); both sides of the groove chuck (18) are connected to support plates (19); the middle of each of the support plates (19) is connected to a first tension spring (111); the end of each of the first tension springs (111) is connected to a cutting tool (112); the middle of each of the cutting tools (112) is connected to a connecting shaft (113); both sides of the second U-shaped plate (15) are fixedly connected to a limiting cylinder (114).

2. A steel bar straightening device for construction machinery according to claim 1, characterized in that: A U-shaped groove (2) is provided on one side of the steel bar straightening machine body (1); a transverse axis (21) is connected to the middle of the U-shaped groove (2); a first triangular plate (22) is rotatably connected to the middle of the transverse axis (21); a plurality of groups of second tension springs (23) are connected to the middle of the first triangular plate (22); and a second triangular plate (24) is fixedly connected to the inner wall of one side of the steel bar straightening machine body (1).

3. The steel bar straightening device for construction machinery according to claim 1, characterized in that: An exhaust fan (3) is connected to the side of the steel bar straightening machine body (1); a cross support frame (31) is fixedly connected to the middle of the exhaust fan (3); a third rotating shaft (32) is rotatably connected to the middle of the cross support frame (31); and a plurality of fan blades (33) are fixedly connected to the middle of the third rotating shaft (32).

4. The steel bar straightening device for construction machinery according to claim 1, characterized in that: The steel bar straightening machine body (1) is rotatably connected to a machine door (4) on the side; the machine door (4) is connected to a plurality of combination leaves (41) on the side; a handle (42) is fixedly connected to the side of the machine door (4); and a glass observation panel (43) is provided in the middle of the machine door (4).

5. The steel bar straightening device for construction machinery according to claim 1, characterized in that: The top of the steel bar straightening machine body (1) is fixedly connected to a plurality of groups of pillars (5); the ends of the pillars (5) are all fixedly connected to U-shaped conveying plates (51).

6. The steel bar straightening device for construction machinery according to claim 3, characterized in that: The end of the exhaust fan (3) is connected to a valve plate (6).

7. The steel bar straightening device for construction machinery according to claim 1, characterized in that: The first servo motor (14) is connected to a first arc-shaped limit plate (7) at the bottom; and the second servo motor (17) is connected to a second arc-shaped limit plate (71) at the bottom.

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