Steel bar bender and machine head inclination angle adjusting device

By designing a tilt angle adjustment device for steel bar bending machines, the collision and deformation problems caused by the inability to adjust the angle of the bend head is solved, and multi-dimensional adjustment of the bend head and efficient processing of steel bar bending are achieved.

CN120055169APending Publication Date: 2025-05-30PUTIAN TIANMA MACHINERY MFG
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Patent Information

Application Number
CN202510390459.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-31
Publication Date
2025-05-30

AI Technical Summary

Technical Problem

The bending heads of existing steel bar bending machines cannot adjust the inclination angle, resulting in the bending structure being prone to collision and deformation and damage.

Method used

A steel bending machine head tilt angle adjustment device is designed, including a base plate, an angle adjustment plate, a hinge board and a screw adjustment assembly. Through the cooperation of the screw adjustment assembly and the inclined sliding groove, the two ends of the adjustment plate are adjusted simultaneously to achieve multi-dimensional angle and distance adjustment of the bend head.

Benefits of technology

The precise angle and distance adjustment of the bent head is achieved, which avoids bending head collisions and structural deformation, and improves the efficiency and safety of steel bar bending.

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Abstract

The invention discloses a steel bar bender and a machine head inclination angle adjusting device, the machine head inclination angle adjusting device comprises a bottom plate, an angle adjusting plate and a screw rod adjusting assembly, one end of the angle adjusting plate is hinged to the bottom plate through a hinge plate, and the other end of the angle adjusting plate is connected to an inclined plane sliding groove in the bottom plate through the screw rod adjusting assembly; one end of the angle adjusting plate can swing along with swinging of the hinge plate by adjusting the lead screw adjusting assembly, the other end of the angle adjusting plate moves along the transverse pin along the slope sliding groove, that is, the two ends of the angle adjusting plate are adjusted at the same time, and therefore the installation angle of the bending head can be adjusted more accurately. And the distance between the angle adjusting plate and the bottom plate is also adjusted during adjustment, so that according to the technical scheme, not only can the mounting angle of the bending head be accurately adjusted, but also the mounting distance of the bending head on the rack can be adjusted, and the bending head can be adjusted in multiple dimensions in space.
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Description

Technical Field

[0001] The present application relates to the field of machining technology, and particularly relates to a device for adjusting the tilt angle of a steel bar bending head. Background Art

[0002] A steel bar bender is a device designed specifically for efficient steel bar processing, with a compact structure and powerful functions. Structurally, the steel bar bender includes a frame, a drum or a dial for automatic feeding, and multiple independent bending heads (i.e., the heads). Among them, each bending head is responsible for different bending tasks, thus achieving flexible and efficient steel bar processing. However, in the prior art, the bending heads of the steel bar bender are fixedly installed vertically on the frame, and the tilt angle cannot be adjusted when bending the steel bars. Moreover, multiple bending heads are on the same plane, and collisions are likely to occur, resulting in deformation and damage of the bending structure. Summary of the Invention

[0003] In view of the above problems, the present application provides a device for adjusting the tilt angle of a steel bar bending head, which is used to solve the technical problems that the bending heads of the above-mentioned steel bar bender cannot adjust the angle and are prone to collisions.

[0004] To achieve the above object, the present application provides a device for adjusting the tilt angle of the head of a steel bar bender, which is installed on the frame of the steel bar bender and connected to the bending head of the steel bar bender for adjusting the installation angle of the bending head. The device for adjusting the tilt angle of the head includes:

[0005] A bottom plate for fixedly installing the device for adjusting the tilt angle of the head on the frame;

[0006] An angle adjusting plate for adjusting the installation angle of the bending head. One end of the angle adjusting plate is hinged to one end of a hinge plate, the other end of the hinge plate is hinged to the bottom plate, and the other end of the angle adjusting plate is hinged to the bottom plate through a screw rod adjusting assembly;

[0007] The screw rod adjusting assembly includes a screw rod nut, an adjusting screw rod, and a screw rod sleeve;

[0008] A cross pin is provided at one end of the screw rod nut and is hinged to the other end of the angle adjusting plate through the cross pin. Both ends of the cross pin are arranged in an inclined plane sliding groove; the inclined plane sliding groove is inclined along the thickness direction of the bottom plate;

[0009] The screw rod nut is threadedly connected to the adjusting screw rod. The screw rod sleeve is rotatably sleeved on the outer periphery of the adjusting screw rod. The adjusting screw rod is hinged to the bottom plate through the screw rod sleeve. When the adjusting screw rod rotates relative to the screw rod nut, the cross pin and the other end of the angle adjusting plate slide along the inclined plane sliding groove, thereby driving the hinge plate to swing to adjust the angle of the angle adjusting plate.

[0010] Further, one end of the bottom plate is provided with a first boss, and the other end of the bottom plate is provided with a second boss. The first boss and the second boss protrude in the same direction along the thickness of the bottom plate; the angle adjustment plate is arranged between the first boss and the second boss;

[0011] The other end of the hinge plate is hinged to the first boss; the inclined plane sliding groove is arranged on one side of the second boss close to the angle adjustment plate.

[0012] Further, a pin hole is arranged on one side of the second boss away from the angle adjustment plate; an articulated block adapted to the pin hole is arranged outside the screw shaft sleeve, and the screw shaft sleeve is hinged to the second boss through the articulated block.

[0013] Further, an adjustment groove is arranged at one end of the adjustment screw away from the cross pin to be adapted to an adjustment wrench.

[0014] Further, the height of the first boss is less than the height of the second boss, and the surface of the angle adjustment plate away from the bottom plate is an inclined surface, so that the thickness of one end of the angle adjustment plate close to the first boss is less than the thickness of the other end close to the second boss.

[0015] Further, the length ratio of the angle adjustment plate to the hinge plate is 3:1 to 4:1, and the included angle range between the inclined plane sliding groove and the bottom plate is 25 degrees to 35 degrees.

[0016] Further, a plurality of mounting holes for connecting with the bending head are arranged on the surface of the angle adjustment plate.

[0017] To solve the above technical problems, the present application also provides another technical solution:

[0018] A steel bar bender includes a frame and a plurality of bending heads; the bending heads are used for bending steel bars;

[0019] Each of the bending heads is installed on the frame through an angle adjustment device, and the angle adjustment device is the angle adjustment device for the head inclination angle of the steel bar bender described in any one of the above technical solutions.

[0020] Further, five bending heads are arranged on the frame.

[0021] Different from the prior art, in the above technical solution, one end of the angle adjustment plate of the head tilt angle adjustment device is hinged to the bottom plate through a hinge plate, and the other end is connected to the inclined sliding groove on the bottom plate through a screw adjustment assembly. By adjusting the screw adjustment assembly, one end of the angle adjustment plate can swing along with the hinge plate, and the other end of the angle adjustment plate moves along the inclined sliding groove along the cross pin, that is, both ends of the angle adjustment plate are adjusted simultaneously, so that the installation angle of the bending head can be adjusted more precisely; and when adjusting, the distance between the angle adjustment plate and the bottom plate will also be adjusted accordingly. Therefore, this technical solution can not only accurately adjust the installation angle of the bending head, but also adjust its installation distance on the frame, so that the bending head can be adjusted in multiple dimensions in space.

[0022] The above description of the invention content is only an overview of the technical solution of this application. In order to enable those of ordinary skill in the art to more clearly understand the technical solution of this application, and then can be implemented according to the content recorded in the description and the drawings, and in order to make the above objects, other objects, features and advantages of this application more easily understood, the following is described in conjunction with the specific implementation manners and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings are only used to illustrate the principles, implementation manners, applications, features and effects of the specific implementation manners of the present invention and other related contents, and should not be considered as a limitation to this application.

[0024] In the drawings of the specification:

[0025] Figure 1 It is a schematic structural diagram of the head tilt angle adjustment device of the steel bar bender described in the specific implementation manner;

[0026] Figure 2 It is a schematic diagram of another angle of the head tilt angle adjustment device of the steel bar bender described in the specific implementation manner;

[0027] Figure 3 It is a side view of the head tilt angle adjustment device of the steel bar bender described in the specific implementation manner;

[0028] Figure 4 It is a schematic diagram of another angle of the head tilt angle adjustment device of the steel bar bender described in the specific implementation manner;

[0029] Figure 5 It is a schematic diagram of the closed state of the head tilt angle adjustment device of the steel bar bender described in the specific implementation manner.

[0030] The descriptions of the reference numerals involved in the above drawings are as follows:

[0031] 1. Bottom plate; 11. First boss; 12. Second boss; 121. Pin hole; 13. Inclined sliding groove;

[0032] 2. Angle adjustment plate; 21. Avoidance hole;

[0033] 3. Hinge plate; 31. First hinge shaft; 32. Second hinge shaft;

[0034] 4. Screw adjustment assembly; 40. Screw nut; 41. Transverse pin; 42. Screw bushing;

[0035] 43. Adjusting screw; Detailed implementation manners

[0036] To illustrate in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects of the present application, the following is described in detail with reference to the specific examples listed and in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and thus are only examples and cannot be used to limit the protection scope of the present application.

[0037] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The term "embodiment" appearing in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0038] Unless otherwise defined, the meanings of the technical terms used herein are the same as those generally understood by those skilled in the technical field to which the present application belongs; the use of the relevant terms herein is only for describing specific embodiments and is not intended to limit the present application.

[0039] In the description of the present application, the phrase "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this article generally represents an "or" logical relationship between the associated objects before and after.

[0040] In the present application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary or secondary, or order relationship between these entities or operations.

[0041] Without further limitation, in this application, the use of the expressions "including", "comprising", "having" or other similar open-ended expressions in a statement is intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method or product that includes the said elements, so that a process, method or product that includes a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such a process, method or product.

[0042] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceeding" are understood not to include the number itself; expressions such as "above", "below", "within" are understood to include the number itself. In addition, in the description of the embodiments of this application, the meaning of "a plurality of" is two or more (including two), and similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in this way, unless otherwise specifically defined.

[0043] In the description of the embodiments of this application, the spatial-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiment or the drawing. It is only for the convenience of describing the specific embodiments of this application or for the reader's understanding, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of this application.

[0044] Unless otherwise clearly specified or limited, in the description of the embodiments of this application, the terms "installed", "connected", "joined", "fixed", "set", etc. should be understood in a broad sense. For example, the said "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art to which this application pertains, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0045] Please refer to Figures 1 to 5, this embodiment provides a device for adjusting the tilt angle of the head of a steel bar bender. The device for adjusting the tilt angle of the head of the steel bar bender is installed on the frame of the steel bar bender, and the device for adjusting the tilt angle of the head is connected to the bending head of the steel bar bender for adjusting the installation angle of the bending head. Among them, the bending head is a main component of the steel bar bender, and the bending head is used to apply a certain bending force to the steel bar so that the steel bar is bent into a predetermined shape according to the design, such as an L shape, a rectangular shape, and so on.

[0046] As Figure 1 shown, in this embodiment, the device for adjusting the tilt angle of the head of the steel bar bender includes: a bottom plate 1, an angle adjusting plate 2, a hinge plate 3, and a screw rod adjusting assembly 4.

[0047] Among them, the bottom plate 1 is used to fixedly install the device for adjusting the tilt angle of the head on the frame.

[0048] The angle adjusting plate 2 is used to adjust the installation angle of the bending head. One end of the angle adjusting plate 2 is hinged to one end of the hinge plate 3, the other end of the hinge plate 3 is hinged to the bottom plate 1, and the other end of the angle adjusting plate 2 is hinged to the bottom plate 1 through the screw rod adjusting assembly 4. As Figure 2 , Figure 3 and Figure 4 shown, the end of the hinge plate 3 close to the angle adjusting plate 2 is hinged to the angle adjusting plate 2 through a first hinge shaft 31; the end of the hinge plate 3 far from the angle adjusting plate 2 is hinged to the bottom plate 1 through a second hinge shaft 32. Therefore, the hinge plate 3 can swing around the second hinge shaft 32, and the angle adjusting plate 2 can swing around the first hinge shaft 31.

[0049] The screw rod adjusting assembly 4 includes a screw rod nut 40, an adjusting screw rod 43, and a screw rod sleeve 42.

[0050] One end of the screw rod nut 40 is provided with a cross pin 41, and the cross pin 41 and the screw rod nut 40 form a T-shaped structure. The screw rod nut 40 is hinged to the other end of the angle adjusting plate 2 through the cross pin 41, and both ends of the cross pin 41 are arranged in an inclined surface sliding groove 13; the inclined surface sliding groove 13 is arranged on the bottom plate 1, and the inclined surface sliding groove 13 is inclined along the thickness direction of the bottom plate 1. As Figure 2 and Figure 3 shown, where the direction indicated by the arrow X is the length direction of the bottom plate 1, the direction indicated by the arrow Y is the width direction of the bottom plate 1, and the direction indicated by the arrow Z is the thickness direction of the bottom plate 1. In this embodiment, the inclined surface sliding groove 13 is arranged along the length direction of the bottom plate 1 and is inclined along the thickness direction of the bottom plate 1.

[0051] The lead screw nut 40 is threadedly connected to the adjusting lead screw 43. The lead screw sleeve 42 is sleeved on the outer periphery of the adjusting lead screw 43 in a circumferentially rotatable manner. The adjusting lead screw 43 is hinged to the bottom plate 1 through the lead screw sleeve 42. For example, the lead screw sleeve 42 is rotatably arranged on the outer periphery of the adjusting lead screw 43 through a rotary bearing. Among them, when the adjusting lead screw 43 rotates, the axial positions of the adjusting lead screw 43 and the lead screw sleeve 42 are relatively fixed and unchanged, and the axial position of the adjusting lead screw 43 and the lead screw nut 40 will change with rotation. Therefore, when the adjusting lead screw 43 rotates relative to the lead screw nut 40, the cross pin 41 and the other end of the angle adjusting plate 2 slide along the inclined plane sliding groove 13, thereby driving the hinge plate 3 to swing to adjust the angle of the angle adjusting plate 2. The length ratio of the angle adjusting plate 2 to the hinge plate 3 is 3:1 to 4:1, and the included angle range between the inclined plane sliding groove 13 and the bottom plate 1 is 25 degrees to 35 degrees.

[0052] In some embodiments, avoidance holes 21 corresponding to the cross pins 41 are provided on both sides of the angle adjusting plate 2.

[0053] As Figure 2 and Figure 3 shown, a first boss 11 is provided at one end of the bottom plate 1, a second boss 12 is provided at the other end of the bottom plate 1, and the first boss 11 and the second boss 12 protrude in the same direction along the thickness of the bottom plate 1; the angle adjusting plate 2 is arranged between the first boss 11 and the second boss 12. The first boss 11, the second boss 12 and the bottom plate 1 can be of an integral structure.

[0054] As Figure 2 and Figure 3 shown, the other end of the hinge plate 3 is hinged to the first boss 11; the inclined plane sliding groove 13 is arranged on one side of the second boss 12 close to the angle adjusting plate 2. And a pin hole 121 is provided on the side of the second boss 12 away from the angle adjusting plate 2; an articulated block adapted to the pin hole 121 is arranged outside the lead screw sleeve 42, and the lead screw sleeve 42 is hinged to the second boss 12 through the articulated block.

[0055] In the above embodiment, the bottom plate 1 is horizontally placed and fixed on the frame of the steel bar bender. For the convenience of installation, a plurality of mounting holes for connecting with the bending head are arranged on the surface of the angle adjusting plate 2. The right end of the bottom plate 1 is hinged to the hinge plate 3 through the second hinge shaft 32, and the hinge plate 3 is hinged to the angle adjusting plate 2 through the first hinge shaft 31. A screw rod nut 40 is installed at the front end of the angle adjusting plate 2. The adjusting screw rod 43 is in threaded connection with the screw rod nut 40. The other end of the adjusting screw rod 43 horizontally passes through the cross pin 41, and the outer side of the adjusting screw rod 43 is axially fixed to the bottom plate 1 by a screw rod sleeve 42. In order to facilitate the rotation of the adjusting screw rod 43, an adjusting groove is arranged at the end of the adjusting screw rod 43 to adapt to an adjusting wrench. Among them, the adjusting groove can be an internal hexagonal groove, a slotted groove or a cross groove, etc. The bottom plate 1 is provided with an inclined sliding groove 13, and both ends of the screw rod nut 40 can slide along the sliding groove.

[0056] When adjusting the angle of the bending head, use a wrench such as an internal hexagonal wrench to rotate the adjusting screw rod 43 in a preset direction (for example, clockwise). Through the threaded connection between the adjusting screw rod 43 and the screw rod nut 40, both ends of the screw rod nut 40 slide downward along the inclined sliding groove 13 of the head adjusting bottom plate 1. Therefore, the upper surface of the angle adjusting plate 2 tilts forward under the action of the hinge plate 3, and the angle of the head installed on the angle adjusting plate 2 tilts forward. On the contrary, it tilts backward, realizing the adjustment of the tilt angle of the head.

[0057] In this embodiment, the overall tilt angle of the bending head (i.e., the head) is adjustable, so that the bent ends of the steel bars are not in the same plane, preventing the last two bending heads of the steel bars from colliding and causing the stirrups to deform.

[0058] In this embodiment, the adjustment efficiency of the tilt angle of the bending head is high, the adjustment process is stable, and the adjustment angle is convenient. Especially in this embodiment, both ends of the angle adjusting plate 2 are adjusted simultaneously, so that the installation angle of the bending head can be adjusted more precisely; and when adjusting, the distance between the angle adjusting plate 2 and the bottom plate 1 will also be adjusted accordingly. Therefore, this technical solution can not only accurately adjust the installation angle of the bending head, but also adjust its installation distance on the frame, enabling the bending head to achieve multi-dimensional adjustment in space.

[0059] As Figure 3 shown, in one embodiment, the height of the first boss 11 is less than the height of the second boss 12, and the surface of the angle adjusting plate 2 away from the bottom plate 1 is an inclined surface, so that the thickness of the end of the angle adjusting plate 2 close to the first boss 11 is less than the thickness of the other end close to the second boss 12. In another embodiment, a steel bar bender is disclosed. The steel bar bender includes a frame and a plurality of bending heads; the bending heads are used for bending steel bars;

[0060] Each of the bending heads is mounted on the frame through an angle adjusting device, and the angle adjusting device is the head tilt angle adjusting device of the steel bar bender described in any one of the above embodiments.

[0061] In one embodiment, five bending heads are provided on the frame, that is, five independent bending heads are provided on the frame, and each bending head can independently bend steel bars.

[0062] As Figure 5 shown, it is a schematic diagram of the closed state of the head tilt angle adjusting device of the steel bar bender. It can be seen that in this embodiment, the angle adjusting plate 2 can be completely attached to the bottom plate 1. Comparing Figure 4 and Figure 5 it can be known that the angle adjusting range of the angle adjusting plate 2 in this embodiment is large, the adjusting speed is fast and the structure is stable.

[0063] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of the present application, the patent protection scope of the present application cannot be limited thereby. Any equivalent structure or equivalent process substitution or modification generated by using the content recorded in the text and drawings of the specification of the present application based on the essential concept of the present application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the present application.

Claims

1. A head tilt angle adjustment device for a steel bar bending machine, installed on a frame of the steel bar bending machine and connected to a bending head of the steel bar bending machine, for adjusting the installation angle of the bending head, characterized in that: The head tilt angle adjustment device comprises: A bottom plate, used for fixing the machine head tilt angle adjustment device on the frame; An angle adjustment plate, used to adjust the installation angle of the bending head, one end of the angle adjustment plate is hinged to one end of the hinge plate, the other end of the hinge plate is hinged to the bottom plate, and the other end of the angle adjustment plate is hinged to the bottom plate through a screw adjustment assembly; The screw adjustment assembly comprises a screw shaft nut, an adjustment screw and a screw shaft sleeve; One end of the screw shaft nut is provided with a transverse pin, and is hinged to the other end of the angle adjustment plate through the transverse pin, and both ends of the transverse pin are arranged in the inclined sliding groove; the inclined sliding groove is inclinedly arranged along the thickness direction of the bottom plate; The screw shaft nut is threadedly connected to the adjusting screw, and the screw shaft sleeve is rotatably sleeved on the outer circumference of the adjusting screw. The adjusting screw is hinged to the base plate through the screw shaft sleeve. When the adjusting screw rotates relative to the screw shaft nut, the cross pin and the other end of the angle adjustment plate slide along the inclined sliding groove, thereby driving the hinge plate to swing to adjust the angle of the angle adjustment plate.

2. The head tilt angle adjustment device of the steel bar bending machine according to claim 1, characterized in that: A first boss is disposed at one end of the bottom plate, and a second boss is disposed at the other end of the bottom plate, wherein the first boss and the second boss protrude in the same direction of the thickness of the bottom plate; the angle adjustment plate is disposed between the first boss and the second boss; The other end of the hinge plate is hinged to the first boss; the inclined sliding groove is arranged on a side of the second boss close to the angle adjustment plate.

3. The head tilt angle adjustment device of the steel bar bending machine according to claim 2 is characterized in that: A pin hole is arranged on one side of the second boss away from the angle adjustment plate; a hinge block matching the pin hole is arranged outside the screw shaft sleeve and is hinged to the second boss through the hinge block.

4. The head tilt angle adjustment device of a steel bar bending machine according to claim 2 or 3, characterized in that: An adjusting slot is arranged at one end of the adjusting screw rod away from the transverse pin to fit an adjusting wrench.

5. The head tilt angle adjustment device of the steel bar bending machine according to claim 2, characterized in that: The height of the first boss is smaller than that of the second boss, and the surface of the angle adjustment plate away from the bottom plate is an inclined surface, so that the thickness of one end of the angle adjustment plate close to the first boss is smaller than the thickness of the other end close to the second boss.

6. The head tilt angle adjustment device of a steel bar bending machine according to claim 1, characterized in that: The length ratio of the angle adjustment plate to the hinge plate is 3:1 to 4:1, and the angle between the inclined sliding groove and the bottom plate is in the range of 25 degrees to 35 degrees.

7. The head tilt angle adjustment device of a steel bar bending machine according to claim 1, characterized in that: The surface of the angle adjustment plate is provided with a plurality of mounting holes for connecting with the bending head.

8. A steel bar bending machine, characterized in that: It comprises a frame and a plurality of bending heads; the bending heads are used for bending steel bars; Each of the bending heads is mounted on the frame via an angle adjustment device, and the angle adjustment device is a head tilt angle adjustment device of the steel bar bending machine according to any one of claims 1 to 7.

9. The steel bar bending machine according to claim 8, characterized in that: Five bending heads are arranged on the frame.