Rebar bending machine
By setting scale lines and adjustment mechanisms on the rebar bending machine, the problems of low efficiency and insufficient precision in fixed-size bending in the existing technology are solved, and fast and accurate rebar bending is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA 19TH METALLURGICAL CORP
- Filing Date
- 2025-04-24
- Publication Date
- 2026-05-26
AI Technical Summary
Existing rebar bending machines are inefficient when bending to a fixed size, and errors in manual measurement are difficult to avoid, making it impossible to achieve rapid fixed-size bending and ensure the accuracy of rebar bending.
The positioning device of the rebar bending machine is equipped with scale lines, sliders, longitudinal adjustment mechanisms, and transverse limiters. The slider position is adjusted and locked by the scale lines, and the transverse limiters are moved by the longitudinal adjustment mechanism to ensure accurate rebar insertion length and achieve fixed-size bending.
It enables rapid bending of steel bars to size, improving the efficiency and accuracy of steel bar bending and reducing errors from manual measurement.
Smart Images
Figure CN224273069U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel bar processing equipment technology, and in particular to a steel bar bending machine. Background Technology
[0002] In construction, steel bar bending machines are often used to bend steel bars to meet construction needs. For example, CN112170707A, "A Steel Bar Bending and Forming Device for Construction Engineering", describes a structure involving steel bar bending, which mainly includes a fixed clamping block, a bending platform, a rotating platform, an auxiliary platform, a limiting column, and a bending column set on the main body. The steel bar extends into the bending platform through the fixing hole of the fixed clamping block, and passes between the auxiliary platform and the limiting column. The rotating platform rotates, driving the bending column to rotate. The bending column causes the steel bar to bend around the limiting column, and the bending point of the steel bar is located at the limiting column.
[0003] However, when construction requires bending steel bars to a specific size, that is, the length of the bent portion of the steel bar must meet the requirements to ensure that the dimensions of the finished product after bending meet the requirements. The aforementioned length of the bent portion of the steel bar refers to the distance between the bending point of the steel bar and the end of the steel bar that extends into the bending platform. However, existing steel bar bending machines, such as the structure involving steel bar bending described in CN112170707A "A Steel Bar Bending and Forming Device for Construction Engineering", require manual measurement of the bending point of the steel bar and marking it on the steel bar. Then, the mark is aligned with the limiting post before bending. In the processing of large quantities of steel bars, repeated measurement and marking lead to low efficiency, and the error of manual measurement is difficult to avoid, making it impossible to achieve rapid bending of steel bars to a specific size and ensure the bending accuracy of the steel bars. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a rebar bending machine, which is mainly used for bending rebars to achieve rapid bending of rebars according to dimensions, realize standardized bending of rebars, and improve the bending efficiency and accuracy of rebars.
[0005] This utility model discloses a rebar bending machine, including a frame, a bending platform mounted on the frame, a rotary table rotatably mounted on the bending platform, a bending column mounted on the rotary table and rotating with the rotary table, a limiting column fixedly mounted on the bending platform through the rotary table, and an auxiliary platform mounted on the bending platform; it also includes a positioning device mounted on the bending platform, the positioning device including a positioning seat, the positioning seat being disposed on the side of the rotary table along the direction in which the rebar extends into the bending platform, the upper surface of the positioning seat having a scale line for indicating the straight-line distance between the center of the transverse limiting member and the center of the limiting column, the scale line... The side of the scale line is provided with a groove on the positioning seat, and a slider that slides along the scale line is provided in the groove. The slider is provided with a locking member for fixing the slider. The positioning seat is provided with a longitudinal adjustment mechanism arranged along the length of the positioning seat. The end of the longitudinal adjustment mechanism is provided with a transverse limiting member that is perpendicular to the longitudinal adjustment mechanism and abuts against the end of the reinforcing bar. The end of the longitudinal adjustment mechanism away from the transverse limiting member is also provided with a positioning rod that abuts against the slider to limit the movement of the longitudinal adjustment mechanism. The distance between the positioning rod and the transverse limiting member is equal to the straight-line distance from the center of the limiting column to the edge of the rotating table.
[0006] Furthermore, the longitudinal adjustment mechanism includes a positioning longitudinal bar that slides through and is slidably connected to the positioning seat, the transverse limiting member is disposed at one end of the positioning longitudinal bar located within the bending platform, and the positioning rod is disposed on the positioning longitudinal bar.
[0007] As a preferred embodiment, the side of the positioning bar away from the lateral limiting member is further provided with a sleeve arranged along the length direction of the positioning bar, and a connecting rod is rotatably provided inside the sleeve, with the positioning rod fixed at the end of the connecting rod near the lateral limiting member.
[0008] As a preferred embodiment, the end of the connecting rod away from the positioning rod is provided with a handle.
[0009] Furthermore, multiple sliders are provided, each slider is slidably disposed in the slide groove and is provided with a locking element.
[0010] As a preferred embodiment, there are two scale lines located on the left and right sides of the longitudinal adjustment mechanism, respectively. Each scale line has a groove on its side for mounting a slider, and each groove contains a slider. The positioning rod is rotatably mounted on the longitudinal adjustment mechanism.
[0011] Furthermore, a limiting groove is formed on the slider, and the end of the positioning rod is engaged in the limiting groove.
[0012] Furthermore, the locking element is a tightening screw that penetrates the slider and abuts against the bottom of the groove.
[0013] Furthermore, the width of the slider is consistent with the minimum division value of the scale line.
[0014] The beneficial effects of this utility model are as follows: By setting a scale line, a slider, a longitudinal adjustment mechanism, and a transverse limiting component on the positioning seat, the slider is adjusted to the corresponding position of the scale line according to the required bending length of the rebar and locked. This allows the operator to guide the longitudinal adjustment mechanism to move according to the slider position until the positioning rod abuts against the slider. At this point, the distance between the transverse limiting component and the center of the limiting post is the bending length of the rebar, thus limiting the length of the rebar extending into the bending platform. Subsequently, for rebars of the same bending size, it is only necessary to extend the rebar into the bending platform and abut against the transverse limiting rod to achieve fixed-size bending of the rebar. This eliminates the need for the operator to repeatedly measure and mark the rebar, thereby achieving rapid bending of the rebar according to the specified size, improving the bending efficiency and accuracy of the rebar. Attached Figure Description
[0015] Figure 1 Top view of this utility model;
[0016] Figure 2 Enlarged view of the positioning seat of this utility model;
[0017] Figure 3 Enlarged view of the rear end of the positioning vertical strip;
[0018] Figure 4 : The view of the rear end of the vertical bar looking forward;
[0019] Figure 5 : Sectional view of the positioning seat;
[0020] Reference numerals: 1-Bending platform; 11-Rotating table; 12-Limiting column; 13-Auxiliary table; 14-Bending column; 2-Positioning device; 21-Positioning seat; 211-Scale line; 22-Slide groove; 221-Slider; 222-Locking component; 223-Limiting groove; 23-Longitudinal adjustment mechanism; 231-Positioning longitudinal bar; 232-Sleeve; 233-Connecting rod; 234-Handle; 24-Transverse limiting component; 25-Positioning rod; 3-Reinforcing bar. Detailed Implementation
[0021] The present invention will be further described below.
[0022] This utility model provides a rebar bending machine, mainly used for bending rebar. It includes a frame, a bending platform 1 mounted on the frame, a rotating table 11 rotatably mounted on the bending platform 1, a bending column 14 mounted on the rotating table 11 and rotating with it, a limiting column 12 fixedly mounted on the bending platform 1 through the rotating table 11, and an auxiliary platform 13 mounted on the bending platform 1. It also includes a positioning device 2 mounted on the bending platform 1. The positioning device 2 includes a positioning seat 21, which is disposed on the side of the rotating table 11 along the direction in which the rebar extends into the bending platform 1. The upper surface of the positioning seat 21 is provided with a scale line 211 indicating the straight-line distance between the center of the transverse limiting member 24 and the center of the limiting column 12. The side of the 1 is provided with a groove 22 on the positioning seat 21. The groove 22 is provided with a slider 221 that slides along the direction of the scale line 211. The slider 221 is provided with a locking member 222 for fixing the slider 221. The positioning seat 21 is provided with a longitudinal adjustment mechanism 23 arranged along the length of the positioning seat 21. The end of the longitudinal adjustment mechanism 23 is provided with a transverse limiting member 24 that is perpendicular to the longitudinal adjustment mechanism and abuts against the end of the steel bar. The end of the longitudinal adjustment mechanism 23 away from the transverse limiting member 24 is also provided with a positioning rod 25 that abuts against the slider 221 to limit the movement of the longitudinal adjustment mechanism 23. The distance between the positioning rod 25 and the transverse limiting member 24 is equal to the straight distance from the center of the limiting column 12 to the edge of the rotating table 11.
[0023] like Figure 1 , Figure 2As shown, the rebar bending machine includes an existing frame, a bending platform 1 mounted on the frame, a rotating table 11 rotatably mounted on the bending platform 1, and a bending column 14 that rotates with the rotating table 11. A drive mechanism is provided below the rotating table 11 to drive the rotating table 11 to rotate, thereby driving the bending column 14 to bend the rebar. A limiting column 12 is provided at the center of the rotating table 11, which is fixedly connected to the bending platform 1. An auxiliary platform 13 is also provided on the bending platform 1. The rebar passes through the auxiliary platform 13 and the limiting column 12 to ensure that the rebar extends vertically into the bending platform 1 for bending. To achieve precise bending of the reinforcing bars, a positioning device 2 is provided on the bending platform 1. This positioning device 2 includes a positioning seat 21 on the bending platform 1. The upper surface of the positioning seat 21 has a scale line 211, which indicates the straight-line distance between the center of the lateral limiting member 24 and the center of the limiting post 12, i.e., the distance between the bending point of the reinforcing bar and the end of the reinforcing bar extending into the bending platform 1. The distance between the lateral limiting member 24 and the positioning rod 25, which are located on the longitudinal adjustment mechanism 23, is the straight-line distance from the center of the limiting post 12 to the edge of the rotating table 11. This ensures that when the positioning rod 25 abuts against the slider 221 adjusted to the corresponding scale line 211, the distance from the lateral limiting member 24 to the center of the limiting post 12 is the required length of the bent portion of the reinforcing bar, thus ensuring bending accuracy. A groove 22 is provided on the side of the scale line 211 located on the positioning seat 21. A slider 221 is slidably installed in the groove 22. The slider 221 is moved to the position of the scale line 211 corresponding to the required bending size of the steel bar, and the slider 221 is fixed in this position by the locking piece 222 on the slider 221. This allows the operator to drive the longitudinal adjustment mechanism 23 to move according to the position of the slider 221 until the positioning rod 25 abuts against the slider 221. When the positioning rod 25 abuts against the slider 221, the longitudinal adjustment mechanism 23 stops moving. At this time, the distance between the center of the transverse limiting piece 24 and the center of the limiting post 12 is the bending length of the steel bar, which limits the length of the steel bar that extends into the bending platform 1. The steel bar only needs to be extended into the bending platform 1 and abut against the transverse limiting rod to achieve the bending of the steel bar to the specified size. There is no need for the operator to repeatedly measure and mark the steel bar, so as to achieve rapid bending of the steel bar to the specified size, improve the bending efficiency and the bending accuracy of the steel bar. The aforementioned positioning rod 25 can be directly and horizontally fixed on the longitudinal adjustment mechanism 23 so as to abut against the slider 221 located on the side of the longitudinal adjustment mechanism 23, or it can be rotatably set on the longitudinal adjustment mechanism 23. When it is necessary to slide the longitudinal adjustment mechanism 23, the positioning rod 25 is rotated to a position perpendicular to the plane of the bending platform 1. When it is necessary to fix the longitudinal adjustment mechanism 23, the positioning rod 25 is rotated to a horizontal position and abuts against the slider 221. The aforementioned transverse limiting member 24 can be a rod or a plate, as long as it can abut against the end of the reinforcing bar that extends into the bending platform 1 to limit the length of the reinforcing bar.
[0024] Taking the bending of a steel bar once as an example, the required bending length of the steel bar is determined, and the slider 221 is moved to the position of the scale line 211 corresponding to the length. The slider 221 is fixed by the locking piece 222, and then the longitudinal adjustment mechanism 23 is driven. The longitudinal adjustment mechanism 23 drives the positioning rod 25 and the transverse limiting piece 24 to move forward or backward at the same time until the positioning rod 25 abuts against the slider 221 in the fixed position. At this time, the longitudinal adjustment mechanism 23 no longer moves, and the distance between the transverse limiting piece 24 and the center of the limiting post 12 is the bending length of the steel bar, so as to limit the length of the steel bar extending into the bending platform 1. After the positioning device 2 is set, the steel bar is extended into the bending platform 1 from between the limiting post 12 and the auxiliary table 13, and the end of the steel bar abuts against the transverse limiting piece 24. At this time, the rotary table 11 is driven to rotate, so as to drive the bending post 14 to rotate, bending the steel bar, and the finished product size meets the requirements. Simply insert the reinforcing bar into the bending platform 1 and make contact with the horizontal limit rod to achieve fixed-size bending of the reinforcing bar. This eliminates the need for operators to repeatedly measure and mark the reinforcing bar, thus achieving rapid bending of the reinforcing bar to the required size, improving the bending efficiency and accuracy of the reinforcing bar.
[0025] The aforementioned longitudinal adjustment mechanism 23 can employ an existing linear reciprocating telescopic mechanism, such as an electric telescopic rod. Simply place the lateral limiting member 24 and the positioning rod 25 at required intervals on the same telescopic section of the electric telescopic rod, and then utilize its telescopic function to drive the lateral limiting member 24 to move longitudinally. Alternatively, the longitudinal adjustment mechanism 23 can employ an existing hydraulic cylinder to drive the straight rod to move along the length of the positioning seat 21. Simply place the lateral limiting member 24 and the positioning rod 25 at required intervals on the straight rod, and utilize the hydraulic cylinder to drive the straight rod to move. As a preferred method, such as… Figure 2As shown, the longitudinal adjustment mechanism includes a positioning longitudinal bar 231 that passes through and is slidably connected to the positioning seat 21. A transverse limiting member 24 is located at one end of the positioning longitudinal bar 231 within the bending platform 1. A positioning rod 25 is mounted on the positioning longitudinal bar 231. The positioning longitudinal bar 231, which passes through and is slidably connected to the positioning seat 21, drives the transverse limiting member 24 to move longitudinally, thus positioning the positioning rod 25 on the positioning longitudinal bar 231. The distance between the positioning rod 25 and the transverse limiting member 24 is ensured to be the straight-line distance from the center of the limiting post 12 to the edge of the rotating table 11. This ensures that when the positioning rod 25 abuts against the slider 221 adjusted to the corresponding scale line 211, the distance from the transverse limiting member 24 to the center of the limiting post 12 is the distance required for the steel bar to be bent. The length of the curved section; the positioning longitudinal bar 231 is directly set through the positioning seat 21, without the need for an additional drive mechanism to drive its movement. Simply pulling the positioning longitudinal bar 231 back and forth within the positioning seat 21 will move the transverse limiting member 24. The length of the positioning longitudinal bar 231 can be selected according to different rebar lengths and the diameter of the installed rotary table 11 or the size of the bending platform 1 to accommodate rebar bending of different lengths. It is also easy to obtain materials, such as existing wooden strips or steel pipes on the construction site. The transverse limiting member 24 is located at one end of the positioning longitudinal bar 231 within the bending platform 1, and also limits the movement range of the positioning longitudinal bar 231. To facilitate control of the movement distance of the positioning longitudinal bar 231 and the contact stability between the positioning rod 25 and the slider 221, such as... Figure 2 , Figure 3 , Figure 5 As shown, the positioning longitudinal bar 231 is further provided with a sleeve 232 along the length of the positioning longitudinal bar on the side away from the transverse limiting member 24. A connecting rod 233 is rotatably provided inside the sleeve 232, and the positioning rod 25 is fixedly installed at the end of the connecting rod 233 near the transverse limiting member 24. The sleeve 232 is provided on the positioning longitudinal bar 231 so that the connecting rod 233 can be rotatably installed inside the sleeve 232. The connecting rod 233 drives the positioning rod 25 to rotate. When the positioning rod 25 rotates to the vertical position, that is, perpendicular to the plane of the bending platform 1, the positioning longitudinal bar 231 can smoothly be positioned in the positioning seat. The sliding mechanism 21 will not jam due to the position of the slider 221. When the positioning rod 25 rotates to the horizontal position, the end of the positioning rod 25 abuts against the slider 221 to restrict the movement of the positioning longitudinal bar 231 and realize the positioning of the transverse limiting member 24. At this time, the distance between the transverse limiting member 24 and the center of the limiting post 12 is the bending length of the steel bar, so as to limit the length of the steel bar extending into the bending platform 1. As long as the steel bar is extended into the bending platform 1 and abuts against the transverse limiting rod, the steel bar can be bent to a fixed size, thereby achieving rapid bending of the steel bar according to the size, improving the bending efficiency and bending accuracy of the steel bar.
[0026] To facilitate the operator's rotation of the connecting rod 233 to drive the positioning rod 25 to rotate and abut against the slider 221, such as... Figure 2 , Figure 4 As shown, the end of the connecting rod 233 away from the positioning rod 25 is provided with a handle 234; at the same time, when the handle 234 is rotated to a vertical plane perpendicular to the plane where the bending platform 1 is located, it can also drive the positioning longitudinal bar 231 to move back and forth, and adjust the position of the transverse limiting member 24; in order to facilitate the operator to operate the handle 234, the handle 234 can also be covered with an anti-slip rubber layer.
[0027] When the reinforcing bar needs to be bent multiple times, in order to facilitate quick positioning of the longitudinal adjustment mechanism 23 so as to drive the transverse adjustment rod to the corresponding position, such as... Figure 2 As shown, multiple sliders 221 are provided, and each slider 221 is slidably disposed in the slide groove 22 and is provided with a locking element 222. The sliders 221 are locked one by one in advance at the corresponding scale line 211 position. Each time bending occurs, only the longitudinal adjustment mechanism 23 needs to be moved so that the positioning rod 25 abuts against the slider 221. In order to facilitate the differentiation of the bending sequence, the sliders 221 can be marked with serial numbers, i.e., 1, 2, 3..., indicating that when bending for the first time, the positioning rod 25 abuts against the slider 1 221, and when bending for the second time, the positioning rod 25 abuts against the slider 2 221. In addition, setting multiple sliders 221 allows operators to pre-arrange according to different bending standards of the reinforcing bars. The sliders 221 are set in advance at the corresponding scale line 211 and the positions of the sliders 221 are marked. This allows the operator to directly adjust the position of the transverse limiting member 24 using the longitudinal adjustment mechanism 23 according to the requirements of bending the reinforcing bars, and to abut the positioning rod 25 against the corresponding slider 221 to fix the position of the longitudinal adjustment mechanism 23, that is, to fix the position of the transverse limiting member 24.
[0028] To avoid the spacing between two adjacent sliders 221 being too small, such as Figure 2As shown, two scale lines 211 are provided, located on the left and right sides of the longitudinal adjustment mechanism 23 respectively. Each scale line 211 has a groove 22 on its side for mounting a slider 221, and each groove 22 contains a slider 221. The positioning rod 25 is rotatably mounted on the longitudinal adjustment mechanism 23. By providing a scale line 211 and a corresponding groove 22 with a slider 221 on each side of the longitudinal adjustment mechanism 23, when the two sliders 221 are very close together, they can be positioned using the sliders 221 on the grooves 22 on the left and right sides of the longitudinal adjustment mechanism 23, so that the positioning rod 25 can accurately abut against the groove. The positioning rod is attached to each slider 221 to ensure the accuracy of the position adjustment of the lateral limiting member 24, i.e., the length of the bent part of the steel bar. At this time, in order to facilitate the positioning rod 25 to abut against the sliders 221 on the left and right sides respectively to limit the position of the longitudinal adjustment mechanism 23, the positioning rod 25 can be rotatably mounted on the longitudinal adjustment mechanism 23 through the hinge seat, or a bearing can be sleeved around the longitudinal adjustment mechanism 23 and fixed to the inner ring of the bearing, and the positioning rod 25 can be welded to the outer ring of the bearing, so that the positioning rod 25 can be rotatably mounted on the longitudinal adjustment mechanism 23; the above-mentioned sleeve 232, connecting rod 233 and other structures can also be rotatably mounted on the longitudinal adjustment mechanism 23.
[0029] To ensure the stability of the connection between the positioning rod 25 and the slider 221, and to prevent the positioning rod 25 from shifting during use, which could cause changes in the restriction of the transverse limiting member 24 on the extension length of the reinforcing bar and reduce the bending accuracy of the reinforcing bar, such as... Figure 5 As shown, a limiting groove 223 is provided on the slider 221, and the end of the positioning rod 25 is engaged in the limiting groove 223. By setting the limiting groove 223 to match the positioning rod 25, the positioning rod 25 is engaged in the limiting groove 223. When the slider 221 is fixed by the locking member 222, the positioning rod 25 is engaged in the limiting groove 223, realizing secondary locking and fixing, avoiding the positioning rod 25 from shifting when the reinforcing bar abuts against the transverse limiting member 24, and ensuring the length of the bent part of the reinforcing bar, that is, the bending accuracy of the reinforcing bar.
[0030] To ensure the locking effect of the locking component 222 on the slider 221, and to prevent the slider 221 from shifting during use and failing to align with the corresponding scale line 211, thus affecting the bending accuracy of the reinforcing bar, such as... Figure 5 As shown, the locking component 222 is a tightening screw that passes through the slider 221 and abuts against the bottom of the slide groove 22; the slider 221 is locked in the slide groove 22 by tightening the tightening screw, and it is low in cost, has a good locking effect, and is easy to replace.
[0031] To avoid misalignment errors caused by visually reading the scale line 211 when adjusting slider 221, such as Figure 2As shown, the width of the slider 221 is consistent with the smallest scale division of the scale line 211; the width of the slider 221 is consistent with the smallest scale division value of the scale line 211 to ensure adjustment accuracy, that is, the dimensional accuracy of the bent part of the steel bar.
Claims
1. A rebar bending machine, comprising a frame, a bending platform (1) mounted on the frame, a rotary table (11) rotatably mounted on the bending platform (1), a bending column (14) mounted on the rotary table (11) and rotating with the rotary table (11), a limiting column (12) passing through the rotary table (11) and fixedly mounted on the bending platform (1), and an auxiliary table (13) mounted on the bending platform (1); characterized in that: It also includes a positioning device (2) set on the bending platform (1). The positioning device (2) includes a positioning seat (21). The positioning seat (21) is set on the side of the rotary table (11) along the direction in which the steel bar extends into the bending platform (1). The upper surface of the positioning seat (21) is provided with a scale line (211) for indicating the straight distance between the center of the transverse limiting member (24) and the center of the limiting post (12). The side of the scale line (211) is provided with a groove (22) located on the positioning seat (21). The groove (22) is provided with a slider (221) that slides along the direction of the scale line (211). The slider (221) is provided with a tool for fixing the slider. (221) Locking member (222); The positioning seat (21) is provided with a longitudinal adjustment mechanism (23) arranged along the length direction of the positioning seat (21), and the end of the longitudinal adjustment mechanism (23) is provided with a transverse limiting member (24) perpendicular to the longitudinal adjustment mechanism (23) and abutting against the end of the reinforcing bar; The end of the longitudinal adjustment mechanism (23) away from the transverse limiting member (24) is also provided with a positioning rod (25) abutting against the slider (221) to limit the movement of the longitudinal adjustment mechanism (23), and the distance between the positioning rod (25) and the transverse limiting member (24) is equal to the straight distance from the center of the limiting column (12) to the edge of the rotating table (11).
2. The rebar bending machine as described in claim 1, characterized in that: The longitudinal adjustment mechanism (23) includes a positioning longitudinal bar (231) that is slidably connected to the positioning seat (21), the transverse limiting member (24) is located at one end of the positioning longitudinal bar (231) within the bending platform (1), and the positioning rod (25) is located on the positioning longitudinal bar (231).
3. A rebar bender as defined in claim 2, wherein: The positioning bar (231) is provided with a sleeve (232) on the side away from the transverse limiting member (24) along the length of the positioning bar. A connecting rod (233) is rotatably provided inside the sleeve (232). The positioning rod (25) is fixed at the end of the connecting rod (233) near the transverse limiting member (24).
4. A rebar bender as defined in claim 3, wherein: The connecting rod (233) has a handle (234) at the end away from the positioning rod (25).
5. A rebar bender as defined in claim 1 wherein: Multiple sliders (221) are provided, and each slider (221) is slidably disposed in the slide groove (22) and is provided with a locking element (222).
6. A rebar bender as defined in claim 5 wherein: Two scale lines (211) are provided and located on the left and right sides of the longitudinal adjustment mechanism (23) respectively. Each scale line (211) has a groove (22) for installing a slider (221) on its side. Each groove (22) has a slider (221) in it. The positioning rod (25) is rotatably mounted on the longitudinal adjustment mechanism (23).
7. A rebar bending machine as described in claim 1, characterized in that: A limiting groove (223) is provided on the slider (221), and the end of the positioning rod (25) is engaged in the limiting groove (223).
8. A rebar bender as defined in claim 1 wherein: The locking element (222) is a tightening screw that passes through the slider (221) and abuts against the bottom of the groove (22).
9. A bar bender as claimed in any one of claims 1 to 8 wherein: The width of the slider (221) is consistent with the minimum division value of the scale line (211).