A processing device for the annular reinforcement bars of a steel reinforcement cage

Abstract

The present invention relates to a processing device for the circular reinforcement bars of a steel reinforcement cage, effectively solving the problems of low automation degree, poor production precision and poor finished product consistency of the steel bar ring forming equipment; the technical solution adopted includes a winding and cutting device and a compression and welding device. The winding and cutting device comprises a cylindrical roller and a cutting machine. The axial movement and circumferential rotation of the roller can realize the spiral winding of the steel bar on the outer wall of the roller, and the cutting machine cuts the spiral steel bar wound outside the roller into spiral small segments. The compression and welding device is used for axially pressing the spiral small segment steel bars obtained by cutting into a ring shape and welding the head and tail ends into a ring. The present invention can automatically and batch complete the winding and cutting of the steel bars, and each segment after cutting has the same size. After compression molding, it is a standard circle, the finished product size is consistent, the precision is high, and it does not deform.

Description

Technical Field

[0001] The invention relates to the field of bridge construction, in particular to a device for processing annular reinforcement bars of a steel cage. Background Art

[0002] The steel cage is the inner skeleton during the casting of the bridge pier. It is mainly composed of circumferentially uniformly distributed axial main bars, internally uniformly distributed axial annular reinforcement bars, and external spiral stirrups. The internal annular reinforcement bars serve as the internal support of the steel cage and are the main components to ensure the overall rigidity of the steel cage. The processing of annular reinforcement bars has generally adopted steel bar bending and forming equipment to assist production. For the forming of large-diameter steel rings, cylindrical or cage-shaped winding equipment is currently mainly used, such as the utility model patent application number 201420308021.5 and the utility model patent application number 201820562242. .3 utility model patents, etc. This type of equipment is most commonly used on construction sites due to its simple structure. However, it is precisely because of its simple structure that its degree of automation, production accuracy and consistency of finished products are also greatly insufficient. For example, when winding, as the number of winding turns increases, the diameter of the outer ring of the steel bar ring gradually increases. After being cut into segments along the main line, the diameter and total length of each segment are also very different. In addition, when welding the steel bar ring, in order to ensure that the welding is firm, the head and tail need to overlap for a section. When welding, the cut steel bar segments will pull the head and tail to overlap for a section and then weld the overlapping section. Since the length of each section of the cut steel bar is different, and the length of the overlapping section has a large human error, the size of the welded steel bar ring will be greatly different. Moreover, when joining the head and tail, it cannot be guaranteed that the steel bar ring is a standard circle. In most cases, it is an ellipse, a pointed circle, etc. If the shape is serious, it needs to be reshaped when welding with the main reinforcement of the steel cage. Summary of the invention

[0003] In view of the problems of low automation, poor production accuracy and poor consistency of finished products in current steel ring forming equipment, the present invention provides a steel cage annular reinforcement rib processing device.

[0004] The technical solution includes a winding and cutting device and a compression welding device. The winding and cutting device includes a pit excavated on the ground and a cylindrical roller. The roller axis is vertical and can be accommodated in the pit. A steel bar head fixing device is provided at the bottom of the outer wall of the roller. The roller is provided with an axial driving mechanism and a circumferential driving mechanism. The axial driving mechanism includes a column coaxial with the roller, the column is fixed at the bottom of the pit, an external thread is provided on the column, an internal thread hole is provided at the axis of the roller, and the column and the roller are matched by threads. The circumferential driving mechanism includes a gear shaft coaxial with the roller, the gear shaft is installed at the upper end of the roller, and the roller is driven to rotate by driving the gear shaft. The winding and cutting device also includes a cutting machine, which is located on one side of the roller and can move back and forth to cut the steel bars wound on the roller.

[0005] The compression welding device includes a vertical cylinder, the inner diameter of which is equal to the outer diameter of the finished annular reinforcing rib; an upper pressing plate is provided at the upper end of the cylinder, and a lower pressing plate is provided at the lower end. The diameters of the upper and lower pressing plates are both larger than the inner diameter of the annular reinforcing rib. An axial notch is opened on the side wall of the cylinder, and the head and tail ends of the compressed steel bars can be welded through the notch.

[0006] It further includes a fixing frame. The gear shaft slides vertically through the fixing frame. The lower end of the gear shaft is inserted into the roller through a hexagonal socket joint. A first reduction gear set meshing with the gear shaft is installed on the fixing frame, and the driving motor drives the gear shaft to rotate through the first reduction gear set.

[0007] An internal gear ring with the same number of teeth as the gear shaft is sleeved outside the gear shaft, and the internal gear ring is installed on the fixing frame through a bearing.

[0008] A second reduction gear set is installed at the lower end of the column.

[0009] The steel bar head fixing device includes a sleeve fixed on the outer wall of the roller. The inner diameter of the sleeve is larger than the diameter of the steel bar, and a pressing bolt is installed on the side wall of the sleeve.

[0010] A winch is installed on the fixing frame, and the lifting rope of the winch is connected to the upper end of the gear shaft. Starting the winch can lift the gear shaft.

[0011] A flared opening is provided at the upper port of the cylinder.

[0012] The compression welding device further includes a plurality of laminates with the same diameter as the pressing plate.

[0013] A plurality of radial air cylinders are evenly distributed on the outer circumference of the pit opening of the pit. The air pressure rods of the air cylinders can extend inwards.

[0014] The present invention can automatically and batch complete the winding and cutting of steel bars, and the size of each section after cutting is consistent. After compression molding, it is a standard circle, the finished product size is consistent, with high precision and no deformation. Description of the Drawings

[0015] Figure 1 It is a front view cross-sectional view of the winding and cutting device.

[0016] Figure 2 It is a front view of the winding and cutting device at the start of winding.

[0017] Figure 3 It is a front view of the winding and cutting device when the steel bar winding is completed.

[0018] Figure 4 It is a schematic diagram of the cutting route. The dotted line in the figure is the walking path of the cutting machine relative to the roller.

[0019] Figure 5 It is the front view of the winding and cutting device after the roller descends after cutting is completed.

[0020] Figure 6 It is Figure 1 the enlarged view of position A in

[0021] Figure 7 It is the top view cross-section of the gear shaft position.

[0022] Figure 8 It is the top view of the relative position between the roller and the cutting machine.

[0023] Figure 9 It is Figure 2 the enlarged view of position B in

[0024] Figure 10 It is the front view of the compression welding device.

[0025] Figure 11 It is the front view cross-section of the compression welding device.

[0026] Figure 12 It is the front view cross-section of the compression welding device after compression into a ring.

[0027] Figure 13 It is the top view cross-section of the cylinder.

[0028] Figure 14 It is the front view cross-section of the compression welding device during multi-layer compression. Specific embodiments

[0029] Combined with the attached drawings, the present invention includes a winding and cutting device and a compression welding device. The winding and cutting device is used to wind the steel bars into a spiral shape and cut them into equal-length spiral segments. The compression welding device is used to axially compress the cut spiral segment steel bars into a ring and weld the head and tail ends into a ring;

[0030] The winding and cutting device includes a pit 1 excavated on the ground and a cylindrical roller 2. The axis of the roller 2 is vertical. When the roller 2 rotates, steel bars can be wound around its outer wall. While winding, the roller 2 moves up and down, so that the steel bars are wound in a spiral shape on the outer wall of the roller 2. The pit 1 provides space for the up and down movement of the roller 2. The shape of the pit 1 is similar to that of the roller 2 and its inner diameter is larger than the outer diameter of the roller 2. The roller 2 can be accommodated in the pit 1. At the bottom of the outer wall of the roller 2, there is a steel bar head fixing device 3 for fixing the end of the steel bar to be wound. The roller 2 is provided with an axial driving mechanism and a circumferential driving mechanism. The axial driving mechanism includes a column 4 coaxial with the roller 2. The column 4 is fixed at the bottom of the pit 1. The column 4 is provided with an external thread, and an internal threaded hole 5 is opened at the axis of the roller 2. The column 4 and the roller 2 are in threaded cooperation. Under the action of the thread, when relative rotation occurs between the column 4 and the roller 2, the roller 2 can be driven to move up and down. The circumferential driving mechanism includes a gear shaft 6 coaxial with the roller 2. The gear shaft 6 is installed at the upper end of the roller 2. By driving the gear shaft 6, the roller 2 can be driven to rotate. The axial movement and circumferential rotation of the roller 2 can realize the spiral winding of the steel bar on the outer wall of the roller 2.

[0031] The winding and cutting device further includes a cutting machine 7. The cutting machine 7 is located on one side of the roller 2 and can move back and forth to cut the steel bars wound on the roller 2. The cutting machine 7 approaches the roller 2 to cut the steel bars wound inside the roller 2, cutting the spiral steel bars into multiple segments.

[0032] The compression and welding device includes a vertical cylinder 8. The inner diameter of the cylinder 8 is equal to the outer diameter of the finished ring-shaped reinforcing bar and is also the same as the outer diameter of the spiral steel bar wound outside the roller 2, that is, the outer diameter of the steel bar segments before and after compression remains unchanged. At the upper end of the cylinder 8, there is an upper pressing plate 9, and at the lower end, there is a lower pressing plate 10. The diameters of the upper and lower pressing plates 10 are both larger than the inner diameter of the ring-shaped reinforcing bar. The pressing plates are driven by oil cylinders. Preferably, the diameter of the upper and lower pressing plates 10 is 3 to 5 millimeters smaller than the inner diameter of the cylinder 8. In this way, it can not only avoid the friction between the pressing plates and the inner wall of the cylinder 8, but also compress the steel bars so that they will not pass through the steel bar ring. The upper pressing plate 9 presses down to axially compress the lower-end steel bar of the spiral into a ring shape. After welding, the lower pressing plate 10 pushes up to push out the finished reinforcing bar. An axial notch 11 is opened on the side wall of the cylinder 8, that is, the cross-section of the cylinder 8 is an incomplete circle with a notch. Through the notch 11, the head and tail ends of the compressed steel bars can be welded.

[0033] It further includes a fixing frame 12. The gear shaft 6 slides vertically through the fixing frame 12 and is inserted into the roller 2 through a hexagonal socket joint at the lower end. When the roller 2 moves up, it pushes the gear shaft 6 to move up synchronously. When the roller 2 moves down, the gear shaft 6 moves down synchronously under the action of gravity. A first reduction gear set 13 meshing with the gear shaft 6 is installed on the fixing frame 12. The driving motor drives the gear shaft 6 to rotate through the first reduction gear set 13.

[0034] A ring gear 14 with the same number of teeth as the gear shaft 6 is sleeved outside the gear shaft 6. The ring gear 14 is installed on the fixed frame 12 through a bearing 15. The fit between the gear shaft 6 and the ring gear 14 is similar to a spline fit. Through the connection of the ring gear 14, the gear shaft 6 and the fixed frame 12 achieve flexible and stable sliding and rotational fits.

[0035] A second reduction gear set 16 is installed at the lower end of the column 4. The driving motor drives the column 4 to rotate through the second reduction gear set 16.

[0036] The reinforcing bar head fixing device 3 includes a sleeve 17 fixed on the outer wall of the roller 2. The inner diameter of the sleeve 17 is larger than the diameter of the reinforcing bar. A compression bolt 18 is installed on the side wall of the sleeve 17. After the reinforcing bar head is inserted into the sleeve 17, the compression bolt 18 is tightened to fix the reinforcing bar head.

[0037] A winch 19 is installed on the fixed frame 12. The lifting rope 20 of the winch 19 is connected to the upper end of the gear shaft 6. Starting the winch 19 can lift the gear shaft 6, so that the lower end of the gear shaft 6 is separated from the roller 2, and thus the reinforcing bar on the roller 2 can be removed from the upper end of the roller 2. During the synchronous up and down movement of the gear shaft 6 and the roller 2, the lifting rope 20 of the winch 19 maintains a sufficient length and will not pull the gear shaft 6.

[0038] A flared opening 21 is provided at the upper port of the cylinder 8, which can facilitate the placement of the reinforcing bar section to be compressed into the cylinder 8.

[0039] The compression welding device further includes a plurality of laminates 22 with the same diameter as the pressure plate. Through the separation of the laminates 22, multiple reinforcing bar sections can be compressed at one time. Specifically, one reinforcing bar section is placed in one laminate 22, and then another reinforcing bar section is placed in another laminate 22, and they are stacked in turn. After stacking is completed, the upper pressure plate 9 is pressed down for compression. After compression is completed, the reinforcing bar rings are welded one by one through the notch 11.

[0040] A plurality of radial air cylinders 24 are evenly distributed on the outer circumference of the pit opening of the pit 1. The air pressure rods of the air cylinders 24 can extend inward. Before the reinforcing bar section outside the roller 2 is cut, the air pressure rods extend. The air pressure rods will support the cut reinforcing bar section. When the roller 2 moves down, the reinforcing bar section will be pushed to the upper end of the roller 2. After lifting the gear shaft 6, it is convenient to remove the reinforcing bar section from the roller 2.

[0041] When the present invention is in use, the roller 2 is initially located outside the pit 1. The end of the reinforcing bar to be wound is inserted into the sleeve 17, and the compression bolt 18 is tightened to fix the reinforcing bar head, as Figure 2; After fixation, start the drive motors of the gear shaft 6 and the column 4 simultaneously. The gear shaft 6 drives the roller 2 to rotate. The column 4 rotates relative to the roller 2 and drives the roller 2 to move downward into the pit 1 under the action of the thread. Note that when setting the rotation speed of the column 4, the rotation speed of the roller 2 itself should be considered to make the relative rotation speed between the column 4 and the roller 2 reach the set value; under the combined action of the downward movement and rotation of the roller 2, the steel bars are spirally wound around the surface of the roller 2 at a fixed pitch, as Figure 3 .

[0042] After winding is completed, turn off the drive motors of the column 4 and the gear. Then extend the cutting machine 7 forward to approach the roller 2. The movement of the cutting machine 7 is driven by an oil cylinder. Then reverse-start the drive motor of the column 4 to drive the roller 2 to move upward by the column 4. At the same time, reverse-start the drive motor of the gear shaft 6 to make the roller 2 rotate slowly while moving upward. In this way, the cutting trajectory of the cutting machine 7 relative to the surface of the roller 2 is a spiral line with a very large pitch, and the helix direction is the same as that of the steel bar winding, as Figure 4 . In this way, the circumferential angle of each section of the steel bar after cutting is greater than 360 degrees. That is, when the outer diameter remains unchanged, there will be an overlapping margin at the head and tail ends of each section of the steel bar after being compressed into a ring for welding. In this way, the lengths of the formed and cut steel bars are consistent and the dimensions are accurate.

[0043] A current sensor can be set on the cutting machine 7 to detect the current of the motor of the cutting machine 7. After the cutting machine 7 contacts the steel bar, the load of the cutting machine 7 will increase significantly, and the corresponding current will increase significantly. At this time, after the current sensor monitors a significant increase in the current, the gear shaft 6 is braked, that is, the rotation of the roller 2 is paused when the cutting machine 7 cuts into the steel bar entity to avoid breaking the blade of the cutting machine 7. After the steel bar is cut at this position, the current decreases and the rotation of the roller 2 is restored.

[0044] Before cutting, extend the air pressure rod of the air pressure cylinder 24 at the opening of the pit 1 to support the steel bar so that the cut steel bar section will not fall. After cutting is completed, start the drive motor of the column 4 to move the roller 2 downward, then the steel bar section is pushed to the upper part of the roller 2. Then start the winch 19 to lift the gear shaft 6 to disengage the gear shaft 6 from the roller 2, and the steel bar section can be taken out from the upper end of the roller 2, as Figure 5 .

[0045] The taken-out steel bar segments are placed into the cylinder 8, which can be placed singly or stacked in multiple layers. Then, the upper pressure plate 9 presses downwards to compress the steel bar segments into a ring. Under the limiting effect of the cylinder 8 and due to the elasticity of the steel bar segments and the outward expansion caused by compression, the steel bar segments will be compressed into a standard circle. Since the length of the steel bar segments is greater than the circumference after forming the ring, the head and tail of the steel bar segments after forming the ring will overlap for a certain length. Then, welding is performed on the overlapping segments at the head and tail of each steel bar ring through the notch 11, and the steel bar ring is closed and formed. Then, the upper and lower pressure plates 10 move upwards simultaneously to push the steel bar ring out from the upper end of the cylinder 8, or the lower pressure plate 10 moves downwards, and the steel bar ring drops from the lower end of the cylinder 8; during compression welding, the winding and cutting device can automatically perform the winding and cutting work of the next group, and such seamless connection can improve the work efficiency.

[0046] In the present invention, the steel bars are wound into a spiral shape with a large pitch through the axial movement and circumferential rotation of the roller 2, and then, through the cooperation of the movement of the cutting machine 7 and the roller 2, the spiral steel bars are cut along the spiral path, so that the circumferential angle of each short spiral steel bar segment after cutting is greater than 360 degrees, thereby providing a margin for the joint of the head and tail of the steel bars, and each steel bar segment is completely the same, achieving good winding accuracy and cutting accuracy. Moreover, the entire winding and cutting process is automatically completed, with a high degree of automation, which can effectively reduce the manual labor and improve the production efficiency; when compressing the steel bar segments, similar to the increase in diameter when a spring is compressed, the spiral steel bar segments have a tendency to expand laterally outwards when being compressed, and in addition, the bent steel bars have the elasticity of springback. Under the limiting effect of the cylinder 8, the steel bars will closely adhere to the inner wall of the cylinder 8, so as to be compressed into a standard circle, and the diameter and the overlapping amount at the end of each single finished product are completely the same. The finished product of the annular reinforcing bar has good accuracy and consistency, which provides convenience for the subsequent welding of the steel bar cage; moreover, the overall structure of the present invention is simple and suitable for use at the construction site.

Claims

1. A processing device for the circular reinforcing bars of a steel reinforcement cage, characterized in that, it includes a winding and cutting device and a compression and welding device. The winding and cutting device includes a pit (1) dug on the ground and a cylindrical roller (2). The axis of the roller (2) is vertical, and the roller (2) can be accommodated in the pit (1). A reinforcing bar head fixing device (3) is provided at the bottom of the outer wall of the roller (2); the roller (2) is provided with an axial driving mechanism and a circumferential driving mechanism. The axial driving mechanism includes a column (4) coaxial with the roller (2). The column (4) is fixed at the bottom of the pit (1). The column (4) is provided with an external thread, and an internal threaded hole (5) is opened at the axis of the roller (2). The column (4) and the roller (2) are in threaded cooperation; the circumferential driving mechanism includes a gear shaft (6) coaxial with the roller (2). The gear shaft (6) is installed at the upper end of the roller (2), and the roller (2) is driven to rotate by driving the gear shaft (6); the winding and cutting device further includes a cutting machine (7). The cutting machine (7) is located on one side of the roller (2) and can move back and forth to cut the reinforcing bars wound on the roller (2); The compression and welding device includes a vertical cylinder (8). The inner diameter of the cylinder (8) is equal to the outer diameter of the finished circular reinforcing bar; an upper pressing plate (9) is provided at the upper end of the cylinder (8), and a lower pressing plate (10) is provided at the lower end. The diameters of the upper and lower pressing plates (10) are both larger than the inner diameter of the reinforcing bar ring. An axial notch (11) is opened on the side wall of the cylinder (8), and the head and tail ends of the compressed reinforcing bars can be welded through the notch (11); It further includes a fixing frame (12). The gear shaft (6) slides vertically through the fixing frame (12) and is inserted into the roller (2) through a hexagonal socket joint at the lower end. A first reduction gear set (13) meshing with the gear shaft (6) is installed on the fixing frame (12), and the driving motor drives the gear shaft (6) to rotate through the first reduction gear set (13); An internal gear ring (14) with the same number of teeth as the gear shaft (6) is sleeved outside the gear shaft (6). The internal gear ring (14) is installed on the fixing frame (12) through a bearing (15).

2. A processing device for the circular reinforcing bars of a steel reinforcement cage according to claim 1, characterized in that, a second reduction gear set (16) is installed at the lower end of the column (4).

3. A processing device for the circular reinforcing bars of a steel reinforcement cage according to claim 1, characterized in that, the reinforcing bar head fixing device (3) includes a sleeve (17) fixed on the outer wall of the roller (2). The inner diameter of the sleeve (17) is larger than the diameter of the reinforcing bar, and a pressing bolt (18) is installed on the side wall of the sleeve (17).

4. A processing device for the circular reinforcing bars of a steel reinforcement cage according to claim 2, characterized in that, a hoist (19) is installed on the fixing frame (12). The lifting rope (20) of the hoist (19) is connected to the upper end of the gear shaft (6). Starting the hoist (19) can lift the gear shaft (6).

5. A processing device for the circular reinforcing bars of a steel reinforcement cage according to claim 1, characterized in that, a flared opening (21) is provided at the upper port of the cylinder (8).

6. A processing device for the annular reinforcing ribs of a steel reinforcement cage according to claim 1, characterized in that, the compression welding device further includes a plurality of laminates (22) having the same diameter as the pressing plate.

7. A processing device for the annular reinforcing ribs of a steel reinforcement cage according to claim 1, characterized in that, a plurality of radial air cylinders (24) are evenly distributed on the outer circumference of the pit opening of the pit (1), and the air pressure rods of the air cylinders (24) can extend inwards.

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