Steel bar returning and sizing mechanism, returning and sizing method and hoop bending machine

Abstract

The present application belongs to the technical field of steel bar processing production line, and discloses a steel bar returning and sizing mechanism, a returning and sizing method and a hoop bending machine. The steel bar returning and sizing mechanism comprises a horizontal returning assembly, a steel bar transmission assembly and a sizing assembly. The horizontal returning assembly comprises a returning frame arranged vertically, which can move along a first horizontal direction to approach or move away from the steel bar. The steel bar transmission assembly comprises an upper pressing assembly and a lower transmission assembly arranged on the returning frame. The upper pressing assembly can slide up and down to press the steel bar tightly on the lower transmission assembly. The lower transmission assembly is rotationally connected to the returning frame and can drive the steel bar to reciprocate along the axial direction. The sizing assembly is arranged on the returning frame and can limit and size the reciprocating distance of the steel bar. The present application can realize automatic returning and bending of the tail of the steel bar twice, and can realize automatic control of the bending length and position of the tail of the steel bar twice, thereby improving the production efficiency and automation degree of the steel bar.

Description

Technical Field

[0001] This invention relates to the technical field of steel bar processing equipment production lines, and in particular to a steel bar return length-fixing mechanism, a return length-fixing method, and a stirrup bending machine. Background Technology

[0002] A rebar bending machine is an automated rebar processing device that automatically bends rebar. With the diversification of production methods, the market demand for rebar requiring both forward and reverse bending has increased. Although existing rebar bending machines can produce this type of rebar, the original return feeding mechanism is placed horizontally and connected after the bending and shearing mechanisms, resulting in an excessively long overall length of the processing equipment. Furthermore, each time the machine switches to producing rebar that only undergoes forward bending, the return feeding mechanism must be manually moved away. Therefore, the equipment's space requirements and level of automation need improvement. Summary of the Invention

[0003] The purpose of this invention is to provide a rebar return length-fixing mechanism, a rebar return length-fixing method, and a rebar bending machine to solve the problems of large equipment space and low automation level of rebar return mechanisms and rebar bending machines.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] The rebar return and length setting mechanism includes:

[0006] A horizontal return assembly, comprising a return frame, the return frame being vertically arranged and capable of moving horizontally to approach or move away from the reinforcing bar;

[0007] A rebar transmission assembly includes an upper pressing assembly and a lower transmission assembly disposed on the return frame. The upper pressing assembly can slide up and down in the vertical direction to press the rebar onto the lower transmission assembly. The lower transmission assembly is rotatably connected to the return frame and can drive the rebar to reciprocate along the axial direction of the rebar.

[0008] A length-fixing component is provided on the return frame, which can limit and fix the distance of the reciprocating motion of the reinforcing bar.

[0009] Optionally, the horizontal feedback component includes:

[0010] A support base is provided, on which two parallel guide shafts are provided, and the return frame is slidably connected to the guide shafts;

[0011] A first horizontal drive mechanism is mounted on the support base, and the output end of the first horizontal drive mechanism is connected to the return frame to drive the return frame to slide.

[0012] Optionally, the pressure-up assembly includes:

[0013] An upper pressure roller is rotatably connected to a sliding shaft, which is slidably connected to the return frame. The sliding direction of the sliding shaft is vertical.

[0014] A first vertical drive mechanism is mounted on the return frame, and the output end of the first vertical drive mechanism is connected to the sliding shaft to drive the sliding shaft to slide.

[0015] Optionally, the pressing assembly further includes a slider, which is disposed on one end of the sliding shaft away from the pressing wheel, and the return frame is provided with a groove, in which the slider is slidably connected.

[0016] Optionally, the lower transmission assembly includes:

[0017] A drive shaft is rotatably connected to the return frame and located below the sliding shaft. One end of the drive shaft is provided with a drive wheel, and the other end is provided with a gear. The drive wheel is positioned directly below the upper pressure wheel. The gear, the drive shaft, and the drive wheel can rotate synchronously.

[0018] The second vertical drive mechanism is mounted on the return frame. The output end of the second vertical drive mechanism is provided with a rack, which is meshed with the gear for transmission. The second vertical drive mechanism drives the rack to rise and fall, thereby driving the gear to rotate, and in turn driving the transmission wheel to rotate. When the steel bar is clamped between the upper pressure wheel and the transmission wheel, the transmission wheel can drive the reciprocating motion of the steel bar.

[0019] Optionally, the lower transmission assembly further includes a guide block with a guide hole. The guide block is disposed on the return frame and located below the rack, and the bottom end of the rack is slidably disposed within the guide hole of the guide block.

[0020] Optionally, the length-fixing component includes:

[0021] An adjusting plate is rotatably connected to the return frame and located above the rack. The adjusting plate is provided with a first limiting member and a second limiting member. When the adjusting plate is in the first rotation position, the first limiting member is located directly above the rack. When the adjusting plate is in the second rotation position, the second limiting member is located directly above the rack. The ends of the first limiting member and the second limiting member facing the rack have a height difference.

[0022] A second horizontal drive mechanism is rotatably mounted on the return frame, and the output end of the second horizontal drive mechanism is hinged to the adjustment plate to drive the adjustment plate to rotate.

[0023] The third limiting member is connected to the return frame, and the rack can stop against the third limiting member to limit its descent.

[0024] Optionally, the top of the rack is provided with a shock-absorbing pad, and the shock-absorbing pad has three shock-absorbing positions, which correspond to the first limiting member, the second limiting member and the third limiting member respectively.

[0025] This invention provides a method for returning steel bars to their designated length. According to the aforementioned steel bar returning and length-fixing mechanism, the method includes the following steps:

[0026] The top of the lower transmission assembly abuts against the fixed length assembly as the initial position;

[0027] The horizontal return assembly moves towards the reinforcing bar, and the upper pressing assembly slides downward and clamps the reinforcing bar between the upper pressing assembly and the lower transmission assembly, cutting the reinforcing bar;

[0028] The lower transmission assembly drives the steel bar to move along the axial direction of the steel bar until the bottom end of the lower transmission assembly abuts against the fixed length assembly, and the tail of the steel bar is bent once.

[0029] The lower transmission assembly reverses the direction of the reinforcing bar and moves it along the axial direction until the lower transmission assembly stops against the length-fixing assembly again, thus bending the tail of the reinforcing bar a second time.

[0030] The return frame of the horizontal return assembly moves in the opposite direction, and the reinforcing bar is dropped.

[0031] The present invention also provides a hoop bending machine, including the aforementioned rebar return length-fixing mechanism.

[0032] The beneficial effects of this invention are:

[0033] The rebar return and length-fixing mechanism of this invention, by setting a rebar transmission assembly, including an upper pressing assembly and a lower transmission assembly, allows the rebar to be automatically returned and bent twice in the opposite direction by the return frame of the horizontal return assembly when it moves closer to the rebar. The lower pressing assembly slides downwards and clamps the rebar onto the lower transmission assembly, driving the rebar to reciprocate along its axial direction via the transmission motion of the lower transmission assembly. This facilitates two automatic return and bending of the rebar's tail end in the opposite direction. The length-fixing assembly limits and fixes the distance of the reciprocating motion of the rebar, preventing excessive movement and achieving automatic control of the length and position of the two bends at the rebar's tail end. When the horizontal return assembly moves away from the rebar, the upper pressing assembly slides upwards to release the rebar, achieving the unloading of the finished rebar without affecting the production of rebar with a single forward bending process, thus improving rebar production efficiency. Both the rebar transmission assembly and the length-fixing assembly are mounted on the return frame, greatly optimizing the equipment space of existing rebar bending machine production lines and improving the automation level of forward and reverse bending of rebar.

[0034] The rebar return length-fixing method of the present invention, by setting an upper pressing component and a lower transmission component of the rebar transmission assembly, the lower transmission component can limit and fix the length with the length-fixing component to realize the tail bending operation of the rebar, which has high work efficiency; by moving the return frame of the horizontal return assembly toward the rebar to clamp the rebar and then moving it in the opposite direction to drop the rebar, the rebar return length-fixing method can realize the rebar forward bending and then return the rebar for reverse bending, which greatly improves the automation of rebar bending.

[0035] The bending machine of the present invention includes a rebar return and length-fixing mechanism provided by the present invention, which realizes the return and length-fixing control of rebar bending in both directions, greatly optimizes the equipment space of the existing bending machine production line, has a compact structure, improves the automation level of rebar bending in both directions and is conducive to improving the efficiency of rebar bending. Attached Figure Description

[0036] Figure 1 This is a front view of the rebar return length-fixing mechanism of the present invention;

[0037] Figure 2 This is a right-side view of the rebar return length-fixing mechanism of the present invention;

[0038] Figure 3 This is a left-side view of the rebar return length-fixing mechanism of the present invention;

[0039] Figure 4 This is a top view of the rebar return length-fixing mechanism of the present invention;

[0040] Figure 5 This is a schematic diagram of the shock-absorbing pad in the rebar return length-fixing mechanism of the present invention.

[0041] In the picture:

[0042] 1. Horizontal return assembly; 11. Return frame; 111. Slide groove; 12. Support base; 13. First horizontal drive mechanism; 14. Guide shaft; 15. Guide sleeve;

[0043] 2. Rebar transmission assembly; 21. Upper pressure assembly; 211. Upper pressure roller; 212. First vertical drive mechanism; 213. Sliding shaft; 214. Slider; 215. Pressure block; 22. Lower transmission assembly; 221. Transmission wheel; 222. Second vertical drive mechanism; 223. Transmission shaft; 224. Gear; 225. Rack; 226. Guide block; 227. Vibration damping pad; 2271. First vibration damping position; 2272. Second vibration damping position; 2273. Third vibration damping position;

[0044] 3. Length-fixing assembly; 31. Adjustment plate; 311. Nylon sleeve; 312. First pin; 32. Second horizontal drive mechanism; 321. Bracket; 322. Second pin; 33. Third limiting component; 34. First limiting component; 35. Second limiting component. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0046] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0049] This invention provides a rebar return and length-fixing mechanism, including a horizontal return component 1, a rebar transmission component 2, and a length-fixing component 3. The horizontal return component 1 includes a return frame 11, which is vertically arranged and can move along a first horizontal direction to approach or move away from the rebar. The rebar transmission component 2 includes an upper pressing component 21 and a lower transmission component 22 disposed on the return frame 11. The upper pressing component 21 can slide up and down to press the rebar onto the lower transmission component 22. The lower transmission component 22 is rotatably connected to the return frame 11 and can drive the rebar to reciprocate along the axial direction of the rebar. The length-fixing component 3 is disposed on the return frame 11 and can limit and fix the distance of the reciprocating movement of the rebar.

[0050] The rebar return and length-fixing mechanism of the present invention is used in a rebar bending machine to return rebars after forward bending for reverse bending, thereby achieving reverse bending recovery and length-fixing. By setting a rebar transmission assembly 2, which includes an upper pressing assembly 21 and a lower transmission assembly 22, when the return frame 11 of the horizontal return assembly 1 drives the rebar transmission assembly 2 closer to the rebar, the upper pressing assembly 21 of the rebar transmission assembly 2 slides downward and clamps the rebar onto the lower transmission assembly 22, i.e., the rebar is clamped and pressed and fixed between the upper pressing assembly 21 and the lower transmission assembly 22; the transmission movement of the lower transmission assembly 22 drives the rebar to reciprocate along its axial direction, facilitating the automatic return of the forward-bent rebar to the tail end for two reverse bending cycles. The reciprocating motion (Y-axis motion) of the reinforcing bar is limited and its length is fixed by setting the length-fixing component 3 and the lower transmission component 22, thus avoiding excessive movement of the reinforcing bar and the lower transmission component 22 and realizing automatic control of the length and position of the two bends at the tail of the reinforcing bar; when the horizontal return component 1 moves away from the reinforcing bar, the finished reinforcing bar is unloaded, which does not affect the production of reinforcing bars that only undergo forward bending, thus improving the production efficiency of reinforcing bars; both the reinforcing bar transmission component 2 and the length-fixing component 3 are set on the return frame 11 and can move with the return frame 11 in the first horizontal direction ( Figure 1 The movement in the X direction greatly optimizes the equipment space of existing rebar bending machine production lines. Compared with the existing technology that requires manual operation of the forward and reverse bending positions of rebars, the present invention improves the automation level of forward and reverse bending of rebars.

[0051] Optionally, the horizontal return assembly 1 further includes a support base 12 and a first horizontal drive mechanism 13. Two parallel guide shafts 14 are provided on the support base 12, and the return frame 11 is slidably connected to the guide shafts 14. The first horizontal drive mechanism 13 is mounted on the support base 12, and the output end of the first horizontal drive mechanism 13 is connected to the return frame 11 to drive the return frame 11 to slide.

[0052] like Figure 1 and Figure 2 As shown, two horizontally parallel guide shafts 14 are arranged on the support base 12 along the X direction. Both ends of the guide shafts 14 are fixedly connected to the support base 12. The bottom end of the return frame 11 is mounted on the guide shafts 14 through guide sleeves 15, realizing a sliding connection between the return frame 11 and the guide shafts 14. The first horizontal drive mechanism 13 is preferably a cylinder. The output end of the first horizontal drive mechanism 13 is provided with a floating joint connected to the return frame 11. The extension and retraction of the first horizontal drive mechanism 13 can drive the return frame 11 to slide forward and backward along the X direction, realizing the movement of the return frame 11 towards and away from the steel bar, completing the bending and forming of the steel bar and the unloading after processing. Specifically, when the first horizontal drive mechanism 13 extends, the return frame 11 approaches the steel bar after it is bent in the forward direction, and the steel bar transmission assembly 2 set on the return frame 11 can clamp and transmit the steel bar; when the first horizontal drive mechanism 13 retracts, the unloading is realized.

[0053] Optionally, the upper pressure assembly 21 includes an upper pressure roller 211 and a first vertical drive mechanism 212. The upper pressure roller 211 is rotatably connected to a sliding shaft 213, and the sliding shaft 213 is slidably connected to the return frame 11. The sliding direction of the sliding shaft 213 is vertical. The first vertical drive mechanism 212 is mounted on the return frame 11, and the output end of the first vertical drive mechanism 212 is connected to the sliding shaft 213 to drive the sliding of the sliding shaft 213.

[0054] Combination Figures 1-2 In this embodiment, the return frame 11 has a vertical (Z-direction) elongated slot. A sliding shaft 213 is slidably installed in the slot. A boss on the sliding shaft 213 abuts against the side of the slot. An upper pressure roller 211 is rotatably mounted on the end of the sliding shaft 213 via a bearing. A first vertical drive mechanism 212 drives the sliding shaft 213 to slide up and down along the slot. The boss has a limiting and guiding function. At the same time, the upper pressure roller 211 can rotate within the bearing. When the upper pressure roller 211 presses the reinforcing bar, the upper pressure roller 211 can rotate with the movement of the reinforcing bar as it moves axially. This is a rotational pressing method. The first vertical drive mechanism 212 is located above the sliding shaft 213. The telescopic movement of the first vertical drive mechanism 212 drives the upper pressure roller 211 to slide up and down. The first vertical drive mechanism 212 is preferably a cylinder.

[0055] Optionally, the upper pressure assembly 21 also includes a slider 214, which is located on the sliding shaft 213 at one end away from the upper pressure roller 211. The return frame 11 is provided with a groove 111, and the slider 214 is slidably connected in the groove 111.

[0056] Combination Figures 1-3 A groove 111 is provided on the side of the return frame 11 away from the upper pressure roller 211. A slider 214 is provided on the end of the sliding shaft 213 away from the upper pressure roller 211. The slider 214 is connected to the sliding shaft 213 by bolts. The slider 214 is slidably connected in the groove 111, so that both ends of the sliding shaft 213 are slidably supported on the return frame 11. In some embodiments, the output end of the first vertical drive mechanism 212 is threadedly connected to a pressure block 215. The pressure block 215 is connected to the slider 214. When the first vertical drive mechanism 212 moves in extension and retraction, the pressure block 215, the slider 214, the sliding shaft 213 and the upper pressure roller 211 slide up and down in the vertical direction as a whole to achieve pressing and transmission of the steel bars.

[0057] Optionally, the lower transmission assembly 22 includes a transmission wheel 221 and a second vertical drive mechanism 222. The transmission wheel 221 is rotatably connected to the return frame 11 via a transmission shaft 223 and is located directly below the upper pressure wheel 211. A gear 224 is also provided on the transmission shaft 223. The gear 224, the transmission shaft 223, and the transmission wheel 221 can rotate synchronously. The second vertical drive mechanism 222 is provided on the return frame 11. A rack 225 is provided at the output end of the second vertical drive mechanism 222. The rack 225 is meshed with the gear 224 for transmission. The second vertical drive mechanism 222 drives the rack 225 to rise and fall, thereby driving the gear 224 to rotate, and in turn driving the transmission wheel 221 to rotate. When the steel bar is clamped between the upper pressure wheel 211 and the transmission wheel 221, the transmission wheel 221 can drive the reciprocating motion of the steel bar.

[0058] Combination Figures 1-3The return frame 11 has mounting holes for installing bearings and spacer assemblies. The drive shaft 223 is mounted within the bearings and secured by snap rings, allowing it to rotate within the bearings. A positioning platform is provided on the outer periphery of the drive shaft 223 at a location for mounting the drive wheel 221. The drive wheel 221 is fitted onto the drive shaft 223 via an expansion sleeve and positioned at the positioning platform, enabling synchronous rotation between the drive wheel 221 and the drive shaft 223. A keyway on the drive shaft 223 mates with the keyway in the inner hole of the gear 224 for installation. The gear 224 is fixed to the drive shaft 224 via a gear gland threaded connection, achieving synchronous rotation between the gear 224 and the drive shaft 223. The second vertical drive mechanism 222 is vertically positioned at the top of the return frame 11. Its output end is vertically downward and connected to the top of the rack 225 via a floating joint. The extension and retraction of the second vertical drive mechanism 222 drives the rack 225 up and down. The rack 225 meshes with the gear 224 to form a rack and pinion transmission mechanism. The rack 225 drives the gear 224 to rotate, which in turn drives the transmission wheel 221 to rotate via the transmission shaft 223. The reinforcing bar between the transmission wheel 221 and the upper pressure wheel 211 moves axially under the rotation of the transmission wheel 221, causing the clamping end of the reinforcing bar to move from the front end to the rear end, facilitating reverse bending of the rear end. Specifically, when the second vertical drive mechanism 222 extends downward to its maximum distance, the transmission wheel 221 rotates clockwise and drives the reinforcing bar to the first reverse bending position; when the second vertical drive mechanism 222 extends upward to a preset position, the transmission wheel 221 reverses and drives the reinforcing bar to the second reverse bending position, thus achieving the reciprocating motion of the reinforcing bar.

[0059] Optionally, the lower transmission assembly 22 further includes a guide block 226, which has a guide hole. The guide block 226 is located on the return frame 11 and below the rack 225. The bottom end of the rack 224 is slidably disposed in the guide hole of the guide block 226.

[0060] like Figure 3 As shown, the guide hole provided on the guide block 226 has the same outer diameter as the bottom end of the rack 225. The bottom end of the rack 225 passes through the guide hole, ensuring that when the rack 225 moves up and down with the second vertical drive mechanism 222, the guide block 226 supports and guides the rack 225, so as to support the rack 225 to mesh with the gear 224 on the side and prevent tooth dislodgement.

[0061] Optionally, the length-fixing assembly 3 includes an adjusting plate 31, a second horizontal drive mechanism 32, and a third limiting member 33. The adjusting plate 31 is rotatably connected to the return frame 11 and located above the rack 225. The adjusting plate 31 is provided with a first limiting member 34 and a second limiting member 35. When the adjusting plate 31 is in the first rotation position, the first limiting member 34 is located directly above the rack 225. When the adjusting plate 31 is in the second rotation position, the second limiting member 35 is located directly above the rack 225. The first limiting member 34 and the second limiting member 35 have a height difference at their ends facing the rack 225. The second horizontal drive mechanism 32 is rotatably mounted on the return frame 11. The output end of the second horizontal drive mechanism 32 is hinged to the adjusting plate 31 to drive the adjusting plate 31 to rotate. The third limiting member 33 is connected to the return frame 11. When the rack 225 descends, it can stop against the third limiting member 33 to limit its movement.

[0062] like Figure 3 and Figure 4 The adjusting plate 31 is V-shaped, with a first limiting member 34 and a second limiting member 35 respectively located at its two ends. During its ascent, the rack 225 can abut against either the first limiting member 34 or the second limiting member 35 to limit its ascent height. Through the extension and retraction of the second horizontal drive mechanism 32, the adjusting plate 33 can be driven to swing between a first rotation position and a second rotation position, creating a height difference between the first limiting member 34 and the second limiting member 35 on the side facing the rack 225, thus limiting the rack 225 at different ascent heights. The third limiting member 33 limits the descent position of the rack 225; after descent, the rack 225 abuts against the top of the third limiting member 33 to limit its descent. A nylon sleeve 311 and a first pin 312 are rotatably connected between the adjusting plate 31 and the return frame 11. The second horizontal drive mechanism 32 is mounted on a bracket 321, which is rotatably connected to the return frame 11 via a second pin 322. Both the first pin 312 and the second pin 322 are vertical (Z-axis) rotating shafts, allowing the adjusting plate 31 and the second horizontal drive mechanism 32 to rotate within their respective horizontal planes. The second horizontal drive mechanism 32 is preferably a cylinder. When the second horizontal drive mechanism 32 extends or retracts, it rotates around the second pin 322, causing the adjusting plate 31 to rotate around the first pin 312, thereby causing the first limiting member 34 and the second limiting member 35 to alternately swing and limit their positions. The output end of the second horizontal drive mechanism 32 is equipped with a U-shaped fork hinged to the adjusting plate 31.

[0063] Optionally, the top of the rack 225 is provided with a shock-absorbing pad 227, which has three shock-absorbing positions, corresponding to the first limiting member 34, the second limiting member 35 and the third limiting member 33 respectively.

[0064] Combination Figure 3 and Figure 5As shown, the shock-absorbing pad 227 is Y-shaped, with a first shock-absorbing position 2271 and a second shock-absorbing position 2272 respectively located on the same side of the two apex corners. The third shock-absorbing position 2273 is located on the other side, corresponding to the third limiting member 33. Nylon pads are provided on the first shock-absorbing position 2271, the second shock-absorbing position 2272, and the third shock-absorbing position 2273, respectively, to cushion the rack 225. The shock-absorbing pad 227 is located at the top of the rack 225, and the rack 225 is adjusted and controlled by limiting the vertical movement of the top of the rack 225.

[0065] Optionally, the limiting height of the first limiting member 34 and the second limiting member 35 on the adjusting plate 31 is adjustable, and the limiting height of the third limiting member 33 on the return frame 11 is adjustable.

[0066] In this embodiment, the first limiting member 34, the second limiting member 35, and the third limiting member 33 are all bolted components and are threadedly connected to the adjusting plate 31 and the return frame 11, respectively. Specifically, the first limiting member 34 and the second limiting member 35 pass through two threaded holes on the adjusting plate 31 from top to bottom, and the limiting height is adjusted by the depth of thread insertion. The height difference between their bottom ends is generally the distance between the two bending points on the reinforcing bar. The upper surface of the top of the rack 225 can abut against the first limiting member 34 or the second limiting member 35 to limit the movement. The third limiting member 33 can be threadedly connected to the guide block 226, such as... Figure 3 As shown, the third limiting member 33 can adjust the limiting position of the lower surface of the top of the rack 225 by adjusting the screw depth. The lower surface of the top of the rack 225 can abut against the top of the third limiting member 33 for limiting. The specific height is related to the bending dimension of the reinforcing bar and needs to be set according to the actual situation. It can be understood that the top of the rack 225 protrudes towards the side opposite to the gear 224 for limiting, which helps to save layout space. The top of the rack 225 protrudes towards the side opposite to the gear 224 by setting a shock-absorbing pad 227, which makes the structure simple and easy to process and assemble.

[0067] Based on the rebar return length-fixing mechanism provided in the above embodiments, the present invention provides a rebar return length-fixing method, comprising the following steps:

[0068] The top end of the lower transmission assembly 22 abuts against the fixed length assembly 3 as the initial position;

[0069] The return frame 11 of the horizontal return assembly 1 moves toward the reinforcing bar, and the upper pressing assembly 21 slides downward and clamps the reinforcing bar between the upper pressing assembly 21 and the lower transmission assembly 22, cutting the reinforcing bar;

[0070] The lower transmission assembly 22 drives the steel bar to move along the axial direction of the steel bar until the bottom end of the lower transmission assembly 22 stops against the fixed length assembly 3, and the tail of the steel bar is bent once.

[0071] The lower transmission component 22 drives the steel bar to move in the axial direction of the steel bar in the opposite direction until the lower transmission component 22 stops again at the length-fixing component 3, and the tail of the steel bar is bent a second time.

[0072] The return frame 11 of the horizontal return assembly 1 moves in the opposite direction, and the steel bars are dropped.

[0073] The rebar return length setting method of the present invention, by setting the upper pressing component 21 and the lower transmission component 22 of the rebar transmission component 2, the lower transmission component 22 can limit and set the length with the length setting component 3 three times, realizing two bending operations on the tail of the rebar, and the operation efficiency is high; by moving the return frame 11 of the horizontal return component 1 toward the rebar to clamp the rebar and then moving it in the opposite direction to drop the rebar, the rebar return length setting method can realize two reverse bending after the rebar is bent in the forward direction, and the degree of automation of rebar bending is greatly improved.

[0074] The present invention also provides a hoop bending machine, including the rebar return length-fixing mechanism provided in the above embodiments.

[0075] The bending machine of the present invention includes a rebar return and length-fixing mechanism provided by the present invention, which realizes the return and length-fixing control of rebar bending in both directions, greatly optimizes the equipment space of the existing bending machine production line, has a compact structure, improves the automation level of rebar bending in both directions and is conducive to improving the efficiency of rebar bending.

[0076] Forward bending of reinforcing bars is a standard bending process and will not be described in detail. A bending machine typically also includes a shearing mechanism and a bending mechanism. Using the aforementioned reinforcing bar return length mechanism, the bending machine performs a brief description of the reverse bending process of the reinforcing bar twice:

[0077] First, the second horizontal drive mechanism 32 is in its initial retracted state, and the bottom end of the second limiting member 35 is directly opposite to and abuts against the second damping position 2272 at the top of the rack 225; the first horizontal drive mechanism 13 drives the return frame 11 to extend to the reinforcing bar, at which point the reinforcing bar is between the upper pressure wheel 211 and the transmission wheel 221, the first vertical drive mechanism 212 extends downward and drives the upper pressure wheel 211 to slide downward and press the reinforcing bar onto the transmission wheel 221, and the shearing mechanism cuts off the tail of the reinforcing bar;

[0078] The second vertical drive mechanism 222 extends downward and drives the rack 225 to move downward while driving the gear 224 to rotate. The gear 224 drives the transmission wheel 221 to rotate through the transmission shaft 223 until the bottom end of the rack 225 stops against the third limiting member 33. At this time, the first bending position of the tail of the steel bar is transmitted to the bending mechanism for the first bending.

[0079] The second horizontal drive mechanism 32 extends and drives the adjustment plate 31 to swing so that the first limiting member 34 is aligned with the first damping position 2271; the output end of the second vertical drive mechanism 222 retracts and drives the rack 225 to rise to abut the first damping position 2271 and stop; during the rise of the rack 225, the gear 224 reverses so that the second bending position of the steel bar tail moves to the bending mechanism for a second bending.

[0080] The output end of the first horizontal drive mechanism 13 retracts and drives the return frame 11 to retract, completing the unloading of the reinforcing bars.

[0081] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A reinforcing bar return and gauging mechanism characterised in that, The utility model relates to a steel bar horizontal conveying device, which comprises a horizontal conveying assembly (1) and a steel bar transmission assembly (2). The horizontal conveying assembly (1) comprises a conveying frame (11) arranged vertically, which can move horizontally to approach or move away from the steel bar. The steel bar transmission assembly (2) comprises an upper pressing assembly (21) arranged on the conveying frame (11) and a lower transmission assembly (22), the upper pressing assembly (21) can slide up and down along the vertical direction to press the steel bar on the lower transmission assembly (22), the lower transmission assembly (22) is rotationally connected to the conveying frame (11), and the lower transmission assembly (22) can drive the steel bar to reciprocate along the axial direction of the steel bar. The steel bar horizontal conveying device further comprises a sizing assembly (3) arranged on the conveying frame (11), which can limit and size the reciprocating distance of the steel bar. The upper pressing assembly (21) comprises an upper pressing wheel (211) rotationally connected to a sliding shaft (213), the sliding shaft (213) is slidingly connected to the conveying frame (11), and the sliding direction of the sliding shaft (213) is the vertical direction. A first vertical driving mechanism (212) is installed on the conveying frame (11), and the output end of the first vertical driving mechanism (212) is connected to the sliding shaft (213) to drive the sliding of the sliding shaft (213). The lower transmission assembly (22) comprises a transmission shaft (223) rotationally connected to the conveying frame (11) and located below the sliding shaft (213), one end of the transmission shaft (223) is provided with a transmission wheel (221), the other end is provided with a gear (224), the transmission wheel (221) is arranged opposite to the lower side of the upper pressing wheel (211), the gear (224), the transmission shaft (223) and the transmission wheel (221) can rotate synchronously. A second vertical driving mechanism (222) is arranged on the conveying frame (11), the output end of the second vertical driving mechanism (222) is provided with a rack (225), the rack (225) is in meshing transmission connection with the gear (224), the second vertical driving mechanism (222) drives the rack (225) to ascend and descend to drive the gear (224) to rotate, and then drives the transmission wheel (221) to rotate, when the steel bar is clamped between the upper pressing wheel (211) and the transmission wheel (221), the transmission wheel (221) can drive the reciprocating movement of the steel bar. The sizing assembly (3) comprises a limiting plate (31) arranged on the conveying frame (11), a limiting rod (32) arranged on the limiting plate (31), and a limiting rod driving mechanism (33) arranged on the limiting plate (31) and connected to the limiting rod (32). ​ ​ An adjusting plate (31) is rotationally connected to the return frame (11) and located above the rack (225), the adjusting plate (31) is provided with a first limiting piece (34) and a second limiting piece (35); when the adjusting plate (31) is located at a first rotation position, the first limiting piece (34) is located directly above the rack (225); when the adjusting plate (31) is located at a second rotation position, the second limiting piece (35) is located directly above the rack (225), the first limiting piece (34) and the second limiting piece (35) have a height difference at one end towards the rack (225); A second horizontal driving mechanism (32) is rotationally installed on the return frame (11), an output end of the second horizontal driving mechanism (32) is hingedly connected to the adjusting plate (31) to drive the adjusting plate (31) to rotate; A third limiting piece (33) is connected to the return frame (11), the rack (225) can be stopped against the third limiting piece (33) to limit when descending.

2. The reinforcing bar loop and measuring mechanism according to claim 1, characterized in that The horizontal return assembly (1) comprises: A support base (12) is provided with two parallel guide shafts (14), the return frame (11) is slidingly connected on the guide shafts (14); A first horizontal driving mechanism (13) is installed on the support base (12), an output end of the first horizontal driving mechanism (13) is connected to the return frame (11) to drive the return frame (11) to slide.

3. The reinforcing bar loop and measuring mechanism according to claim 1, wherein The upper pressing assembly (21) further comprises a sliding block (214) provided on the sliding shaft (213) at an end away from the upper pressing wheel (211), the return frame (11) is provided with a sliding groove (111), and the sliding block (214) is slidingly connected in the sliding groove (111).

4. The reinforcing bar loop and measuring mechanism according to claim 1, wherein The lower transmission assembly (22) further comprises a guide block (226) provided with a guide hole, the guide block (226) is arranged on the return frame (11) and located below the rack (225), and a bottom end of the rack (225) is slidingly arranged in the guide hole of the guide block (226).

5. The reinforcing bar loop and measuring mechanism according to claim 1, wherein A damping pad (227) is arranged at a top end of the rack (225), and the damping pad (227) is provided with three damping positions corresponding to the first limiting piece (34), the second limiting piece (35) and the third limiting piece (33) respectively.

6. A method of gauging return, characterized by The reinforcing steel bar return and sizing mechanism according to any one of claims 1-5, the return and sizing method comprising the following steps: A top end of the lower transmission assembly (22) is stopped against the sizing assembly (3) as an initial position; The return frame (11) of the horizontal return assembly (1) moves towards the reinforcing steel bar, the upper pressing assembly (21) slides downwards and clamps the reinforcing steel bar between the upper pressing assembly (21) and the lower transmission assembly (22), and the reinforcing steel bar is cut off; The lower transmission assembly (22) drives the steel bar to move along the axial direction of the steel bar until the bottom end of the lower transmission assembly (22) abuts against the length measuring assembly (3), and the tail of the steel bar is bent once; The lower transmission assembly (22) drives the steel bar to move along the axial direction of the steel bar in the reverse direction until the lower transmission assembly (22) abuts against the length measuring assembly (3) again, and the tail of the steel bar is bent twice; The return frame (11) of the horizontal return assembly (1) moves in the reverse direction, and the steel bar is discharged.

7. A crimping machine, characterized in that The steel bar return length measuring mechanism comprises the horizontal return assembly (1) and the length measuring assembly (3).

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