A large-scale steel bar bending and forming equipment with bidirectional bending and automatic diameter changing.

Abstract

This application discloses a large-scale steel bar bending and forming equipment with bidirectional bending and automatic diameter changing, including at least one bidirectional diameter changing bending host. This host is capable of bending steel bars in different directions and with different bending radii. In the bending and forming equipment disclosed in this application, the bidirectional diameter changing bending host can work in conjunction with other auxiliary bending hosts, thereby improving the automation level of steel bar bending.

Description

Technical Field

[0001] This invention relates to the field of construction equipment, and in particular to a large steel bar bending and forming equipment with bidirectional bending and automatic diameter changing. Background Technology

[0002] With the improvement of steel bar processing equipment and the popularization of automation equipment in recent years, CNC steel bar bending equipment has become an essential piece of equipment for steel bar processing and distribution centers, high-speed railways, highways and bridge construction projects. Steel bar bending equipment is mainly used for bending steel bar shapes, especially for bending straight steel bars into specific shapes.

[0003] Currently, CNC rebar bending equipment in the industry generally has the ability to bend in a single direction and process rebar products with a fixed bending radius. It does not have the ability to automatically process rebar products that simultaneously meet the processing needs of different bending directions, different side length angles, and different bending radii. It is also difficult to arbitrarily adjust bending parameters such as bending direction and bending radius. Summary of the Invention

[0004] The purpose of this invention is to provide a large steel bar bending and forming equipment with bidirectional bending and automatic diameter changing, which can improve the above-mentioned problems.

[0005] The embodiments of the present invention are implemented as follows:

[0006] This invention provides a large steel bar bending and forming equipment with bidirectional bending and automatic diameter changing, which includes: a feeding device, a bending working component, and a feeding mechanism;

[0007] The feeding device is used to feed the target steel bar into the bending station of at least one bending machine.

[0008] The bending work assembly includes at least one bidirectional variable diameter bending host, which is used to bend the target steel bar on the processing plane. The bending position of the bidirectional variable diameter bending host is adjustable on the working horizontal line, and the bending direction and bending radius of the target steel bar can be automatically adjusted by the bidirectional variable diameter bending host.

[0009] The feeding mechanism is used to transfer the target steel bar, after being processed by the bending working component, into the collection bin.

[0010] It is understood that this application discloses a large-scale steel bar bending and forming equipment with bidirectional bending and automatic diameter changing, including at least one bidirectional diameter changing bending host, which can bend steel bars with different directions and different bending radii and other parameters. It can work in conjunction with other auxiliary bending hosts, and the bending and forming equipment can enrich the bending variations of steel bars.

[0011] In an optional embodiment of the present invention, the bidirectional variable diameter bending machine includes a first bending shaft and a bidirectional variable diameter bending mandrel;

[0012] The bidirectional variable diameter bending mandrel includes at least two forward bending heads and two reverse bending heads. The bending heads in each direction are stacked together in order of increasing radius to form a forward bending head assembly and a reverse bending head assembly. The forward bending head assembly and the reverse bending head assembly are fixed on a first lifting mechanism, and the forward bending head assembly and the reverse bending head assembly are fixed on the same horizontal line. The forward bending head assembly and the reverse bending head assembly form a first bending station. The first lifting mechanism can push the corresponding bending head into or out of the processing plane through lifting movement.

[0013] On the working plane, the first bending axis can move along a first arc-shaped track to push the target steel bar to bend in a first direction with the forward bending head located on the processing plane as a support, or to push the target steel bar to bend in a second direction with the reverse bending head located on the processing plane as a support, wherein the first direction and the second direction are opposite.

[0014] It can be understood that the interaction between the first bending shaft and any one of the forward bending heads enables bending of the target rebar in a first direction; the interaction between the first bending shaft and any one of the reverse bending heads enables bending of the target rebar in a second direction. Therefore, the bidirectional variable diameter bending machine can bend rebar in different bending directions. Furthermore, the radii of the forward bending heads in the forward bending head assembly are different, and the radii of the reverse bending heads in the reverse bending head assembly are different. The first lifting mechanism can selectively advance the bending head corresponding to the target size onto the processing plane through lifting motion, thereby enabling the bidirectional variable diameter bending machine to bend rebar with different bending radii.

[0015] In an optional embodiment of the present invention, the first bending shaft is disposed on the second lifting mechanism, which can push the first bending shaft into or out of the processing plane through lifting and lowering movements.

[0016] It is understandable that the first lifting mechanism functions in two ways: firstly, it can selectively push the bending head corresponding to the target size into the processing plane through lifting motion; secondly, it can pull all the bending heads out of the processing plane through lifting motion to avoid the target rebar. The second lifting mechanism functions in two ways: firstly, it can push the first bending shaft into the processing plane through lifting motion, allowing the first bending shaft to cooperate with the forward or reverse bending head to complete the bending process; secondly, it can pull the first bending shaft out of the processing plane through lifting motion to avoid the target rebar.

[0017] In an optional embodiment of the present invention, the bending work assembly may include an auxiliary bending host, which can cooperate with the bidirectional variable diameter bending host to bend the target steel bar to meet various processing requirements; the bidirectional variable diameter bending host can exit the processing plane through the sinking movement of the first lifting mechanism and / or the second lifting mechanism to avoid the target steel bar; the auxiliary bending host can continuously process subsequent bending processes; the auxiliary bending host can also exit the processing plane through the sinking movement of the corresponding lifting mechanism to avoid the target steel bar.

[0018] It is understandable that, in addition to the bidirectional variable diameter bending main unit, the bending work assembly can also be equipped with other auxiliary bending main units. The bidirectional variable diameter bending main unit and other auxiliary bending main units can work together to enrich the bending variations of the reinforcing bars. The working sequence of each bending main unit in the bending forming equipment is different. After the target reinforcing bar is bent, other non-working bending main units in the working plane may obstruct the processing of the target reinforcing bar. Therefore, both the bidirectional variable diameter bending main unit and the auxiliary bending main units can exit the processing plane through the sinking movement of their corresponding lifting mechanisms to avoid obstructing the target reinforcing bar.

[0019] In an optional embodiment of the present invention, the auxiliary bending host includes at least one of a conventional bending host, a ram's horn bending host, and a unidirectional variable diameter bending host.

[0020] In an optional embodiment of the present invention, the unidirectional variable diameter bending host includes: a second bending shaft and a unidirectional variable diameter bending mandrel; the unidirectional variable diameter bending mandrel includes at least two bending heads stacked together in order of increasing radius to form a bending head assembly, and the position where the bending head assembly is tangent to the working horizontal line is the second bending station; the bending head assembly is fixed on a third lifting mechanism, and the third lifting mechanism can push the corresponding bending head into or out of the processing plane through lifting movement.

[0021] It is understandable that the bending head has different radius dimensions. The third lifting mechanism can select to push the bending head corresponding to the target size into the processing plane through the lifting movement, so that the unidirectional variable diameter bending host can achieve bending processing of steel bars with different bending radii.

[0022] In an optional embodiment of the present invention, the second bending shaft is disposed on the fourth lifting mechanism. The fourth lifting mechanism can push the second bending shaft into the processing plane for bending processing through lifting and lowering movement, or withdraw it from the processing plane to avoid the target steel bar.

[0023] In an optional embodiment of the present invention, the first lifting mechanism and the third lifting mechanism may be the same device; the second lifting mechanism and the fourth lifting mechanism may be the same device.

[0024] It is understandable that a unidirectional variable diameter bending host can replace a bidirectional variable diameter bending host in a steel bar bending and forming equipment, that is, the second bending shaft can replace the first bending shaft, and the aforementioned bending head can replace the forward bending head and the reverse bending head.

[0025] In an optional embodiment of the present invention, the bending forming device further includes an anti-collision mechanism, which is capable of extending and retracting in a direction perpendicular to the processing plane to lift the bent portion of the reinforcing bar.

[0026] It's understandable that reinforcing bars have a certain amount of springback when bent. To meet the specified angle, the reinforcing bars still need to be bent at an angle, which can lead to them intersecting during the bending process. The anti-collision mechanism guides the reinforcing bars during the bending process, ensuring they don't collide with each other and become deformed or unusable.

[0027] In an optional embodiment of the present invention, the bending forming device further includes an auxiliary feeding mechanism; the auxiliary feeding mechanism includes a first telescopic component and an auxiliary hook disposed at the end of the first telescopic component, the first telescopic component being capable of telescopic extension and retraction in a direction perpendicular to the processing plane.

[0028] It is understandable that the auxiliary feeding mechanism is a mechanism that helps the steel bars to be accurately placed. For individual steel bars that are not in place, they can be forced into place by pressing down the auxiliary hook after feeding.

[0029] Beneficial effects:

[0030] This application discloses a large-scale steel bar bending and forming equipment with bidirectional bending and automatic diameter changing, including at least one bidirectional diameter changing bending host. This bidirectional diameter changing bending host can bend steel bars with different directions and different bending radii. It can work in conjunction with other auxiliary bending hosts, and the bending and forming equipment can enrich the bending variations of steel bars.

[0031] The bending machines in a bending forming equipment operate in different sequences. After the target rebar is bent, other non-operating bending machines in the working plane may obstruct the processing of the target rebar. Therefore, both the bidirectional variable diameter bending machine and the auxiliary bending machine can exit the processing plane through the sinking motion of their corresponding lifting mechanisms to avoid obstructing the target rebar.

[0032] The auxiliary bending machine includes at least one of a conventional bending machine, a ram's horn bending machine, and a unidirectional variable diameter bending machine. The ram's horn bending machine can bend reinforcing bars in different bending directions, while the unidirectional variable diameter bending machine can bend reinforcing bars with different bending radii.

[0033] The bending assembly also includes an anti-collision mechanism. When the anti-collision mechanism is raised, it can guide the steel bars during the bending process, intersecting with the original processing plane, so as to avoid the steel bars colliding with each other during the bending process and deforming and scrapping them.

[0034] This steel bar bending and forming equipment also includes an auxiliary feeding mechanism, which is a mechanism to help the steel bars be accurately positioned. For individual steel bars that are not in place, they can be forced into place by pressing down on the auxiliary hook after feeding.

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a structural schematic diagram of a large steel bar bending and forming equipment with bidirectional bending and automatic diameter changing provided by the present invention;

[0038] Figure 2 yes Figure 1 The diagram shows the working scene of a large steel bar bending and forming equipment.

[0039] Figure 3 This is a schematic diagram of the structure of the bidirectional variable diameter bending host provided by the present invention;

[0040] Figure 4 yes Figure 3 The cross-sectional view of the bidirectional variable diameter bending machine shown.

[0041] Figure 5 This is a schematic diagram of the structure of the unidirectional variable diameter bending host provided by the present invention;

[0042] Figure 6 This is a schematic diagram of the anti-collision mechanism provided by the present invention;

[0043] Figure 7 yes Figure 6The diagram shows a scenario where the anti-collision mechanism lifts up the reinforcing steel bar.

[0044] Figure 8 This is a schematic diagram of the auxiliary feeding mechanism provided by the present invention;

[0045] Figure 9 yes Figure 8 A partial side view of the auxiliary feeding mechanism is shown. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0047] This invention provides a large steel bar bending and forming equipment with bidirectional bending and automatic diameter changing, which includes: a feeding device, a bending working component, and a feeding mechanism.

[0048] The feeding device is used to feed the target steel bar into the bending station of at least one bending machine; the bending working assembly includes at least one bidirectional variable diameter bending machine, which is used to bend the target steel bar on the processing plane, the bending station of the bidirectional variable diameter bending machine is adjustable on the working horizontal line, and the bending direction and bending radius of the bidirectional variable diameter bending machine can be automatically adjusted; the unloading mechanism is used to transfer the target steel bar processed by the bending working assembly to the collection bin.

[0049] like Figure 1 The large steel bar bending and forming equipment shown includes four bending main units arranged symmetrically, including two bidirectional variable diameter bending main units arranged symmetrically, namely the first bidirectional variable diameter bending main unit 110 and the second bidirectional variable diameter bending main unit 120.

[0050] It is understood that this application discloses a large-scale steel bar bending and forming equipment with bidirectional bending and automatic diameter changing, including at least one bidirectional diameter changing bending host, which can bend steel bars with different directions and different bending radii and other parameters. It can work in conjunction with other auxiliary bending hosts, and the bending and forming equipment can enrich the bending variations of steel bars.

[0051] In an optional embodiment of the present invention, the first bidirectional variable diameter bending machine 110 and the second bidirectional variable diameter bending machine 120 have the same structure. For example... Figure 3 and Figure 4As shown, the structure of the bidirectional variable diameter bending machine 10 is introduced as an example. The bidirectional variable diameter bending machine 10 includes a first bending station 11, a first bending shaft 12, at least two forward bending heads with unequal radii, and at least two reverse bending heads with unequal radii.

[0052] like Figure 4 As shown, the bidirectional variable diameter bending machine 10 includes three forward bending heads with different radii, namely a first forward bending head 131, a second forward bending head 132, and a third forward bending head 133. The three forward bending heads with different radii are stacked together in order of increasing radius to form a forward bending head assembly 130. The bidirectional variable diameter bending machine 10 also includes three reverse bending heads with different radii, namely a first reverse bending head 141, a second reverse bending head 142, and a third reverse bending head 143. The three reverse bending heads with different radii are stacked together in order of increasing radius to form a reverse bending head assembly 140.

[0053] like Figure 3 and Figure 4 As shown, both the forward bending head assembly 130 and the reverse bending head assembly 140 are fixed on the first lifting mechanism 15, and the forward bending head assembly 130 and the reverse bending head assembly 140 are fixed on the same horizontal line. The forward bending head assembly 130 and the reverse bending head assembly 140 form the first bending station 11. The first lifting mechanism 15 can push the corresponding bending head into the processing plane or out of the processing plane through the lifting movement.

[0054] like Figure 3 and Figure 4 As shown, on the working plane, the first bending shaft 12 can move along the first arc track 100 to push the target steel bar 1 to bend in the first direction with the first forward bending head 131, the second forward bending head 132 or the third forward bending head 133 located on the processing plane as supports, or to push the target steel bar 1 to bend in the second direction with the first reverse bending head 141, the second reverse bending head 142 or the third reverse bending head 143 located on the processing plane as supports, the first direction and the second direction are opposite.

[0055] It can be understood that the interaction between the first bending shaft and any one of the forward bending heads enables bending of the target rebar in a first direction; the interaction between the first bending shaft and any one of the reverse bending heads enables bending of the target rebar in a second direction. Therefore, the bidirectional variable diameter bending machine can bend rebar in different bending directions. Furthermore, the radii of the forward bending heads in the forward bending head assembly are different, and the radii of the reverse bending heads in the reverse bending head assembly are different. The first lifting mechanism can selectively advance the bending head corresponding to the target size onto the processing plane through lifting motion, thereby enabling the bidirectional variable diameter bending machine to bend rebar with different bending radii.

[0056] In optional embodiments of the present invention, reference continues to be made to... Figure 4 The first bending shaft 12 is mounted on the second lifting mechanism 16. The second lifting mechanism 16 can push the first bending shaft 12 into or out of the processing plane through lifting and lowering movements.

[0057] The first lifting mechanism functions in two ways: firstly, it can selectively push the bending head corresponding to the target size into the processing plane through lifting motion; secondly, it can pull all the bending heads out of the processing plane through lifting motion to avoid the target rebar. The second lifting mechanism functions in two ways: firstly, it can push the first bending shaft 12 into the processing plane through lifting motion, allowing the first bending shaft 12 to cooperate with the forward or reverse bending head to complete the bending process; secondly, it can pull the first bending shaft 12 out of the processing plane through lifting motion to avoid the target rebar.

[0058] In an optional embodiment of the present invention, the bending working assembly further includes an auxiliary bending host, which can cooperate with the bidirectional variable diameter bending host to bend the target steel bar to meet diverse processing requirements. For example... Figure 1 The large-scale steel bar bending and forming equipment shown includes, in addition to the first bidirectional variable diameter bending host 110 and the second bidirectional variable diameter bending host 120, two auxiliary bending hosts symmetrically arranged, namely the first auxiliary bending host and the second auxiliary bending host. The bidirectional variable diameter bending host 10 can exit the processing plane through the settling movement of the first lifting mechanism 15 and / or the second lifting mechanism 16, thus avoiding the target steel bar; the auxiliary bending hosts can also exit the processing plane through the settling movement of their corresponding lifting mechanisms, thus avoiding the target steel bar. Figure 2 As shown, after the first bidirectional variable diameter bending host 110 and the second bidirectional variable diameter bending host 120 complete the bending process on the target steel bar 1, they can exit the processing plane through the corresponding lifting equipment to avoid the target steel bar 1, so that the target steel bar 1 can be further processed by the first auxiliary bending host and the second auxiliary bending host.

[0059] It is understandable that, in addition to the bidirectional variable-diameter bending main unit, other auxiliary bending main units can be set up in the bending work assembly. The bidirectional variable-diameter bending main unit and other auxiliary bending main units can work together to enrich the bending variations of the reinforcing bars. The working sequence of each bending main unit in the bending forming equipment is different. After the target reinforcing bar is bent, other non-working bending main units in the working plane may obstruct the processing of the target reinforcing bar. Therefore, both the bidirectional variable-diameter bending main unit and the auxiliary bending main units can exit the processing plane through the sinking movement of their corresponding lifting mechanisms to avoid obstructing the target reinforcing bar.

[0060] In an optional embodiment of the present invention, the auxiliary bending machine includes at least one of a conventional bending machine, a ram's horn bending machine, and a unidirectional variable diameter bending machine. The ram's horn bending machine can bend the reinforcing bars in different bending directions, while the unidirectional variable diameter bending machine can bend the reinforcing bars with different bending radii.

[0061] In optional embodiments of the present invention, such as Figure 5 The unidirectional variable diameter bending machine 30 shown includes: a second bending station 31, a second bending shaft 32, and at least two bending heads with unequal radii. Figure 5 Two bending heads are shown, namely the first bending head 33 and the second bending head 34. The first bending head 33 and the second bending head 34 are stacked together in order of increasing radius to form a bending head assembly. The position where the bending head assembly is tangent to the working horizontal line is the second bending station 31. The bending head assembly is fixed on the third lifting mechanism (not shown in the figure). The third lifting mechanism can push the corresponding bending head into or out of the processing plane through lifting and lowering movements. The specific radius transformation principle is similar to that of the bidirectional variable diameter bending host.

[0062] It is understandable that the bending head has different radius dimensions. The third lifting mechanism can select to push the bending head corresponding to the target size into the processing plane through the lifting movement, so that the unidirectional variable diameter bending host can achieve bending processing of steel bars with different bending radii.

[0063] In an optional embodiment of the present invention, the second bending shaft 32 is disposed on the fourth lifting mechanism (not shown in the figure). The fourth lifting mechanism can push the second bending shaft 32 into the processing plane for bending processing through lifting movement, or exit the processing plane to avoid the target steel bar.

[0064] In optional embodiments of the present invention, the first lifting mechanism and the third lifting mechanism may be the same device; the second lifting mechanism and the fourth lifting mechanism may be the same device.

[0065] It is understandable that a unidirectional variable diameter bending host can replace a bidirectional variable diameter bending host in a steel bar bending and forming equipment, that is, the second bending shaft can replace the first bending shaft, and the aforementioned bending head assembly can replace the forward bending head assembly and the reverse bending head assembly.

[0066] In addition, ordinary bending machines and ram's horn bending machines can also replace one of the bidirectional variable diameter bending machines in the steel bar bending and forming equipment. The replacement method is similar to that of the unidirectional variable diameter bending machine mentioned above.

[0067] In an optional embodiment of the invention, the bending working assembly further includes an anti-collision mechanism capable of extending and retracting in a direction perpendicular to the processing plane to lift the bent portion of the reinforcing bar. Figure 6 and Figure 7 As shown, after the anti-collision mechanism 40 extends, it indirectly lifts the bent part of the target steel bar 1 to prevent it from colliding with other parts of the steel bar 1 on the processing plane.

[0068] It's understandable that reinforcing bars have a certain amount of springback when bent. To meet the specified angle, the reinforcing bars still need to be bent at an angle, which can lead to them intersecting during the bending process. The anti-collision mechanism guides the reinforcing bars during the bending process, ensuring they don't collide with each other and become deformed or unusable.

[0069] In an optional embodiment of the invention, the bending forming apparatus further includes an auxiliary feeding mechanism. For example... Figure 8 and Figure 9 As shown, the auxiliary feeding mechanism includes a first telescopic component 51 and an auxiliary hook 52 disposed at the end of the first telescopic component 51. The first telescopic component 51 can extend and retract in a direction perpendicular to the processing plane.

[0070] It is understandable that the auxiliary feeding mechanism is a mechanism that helps the target steel bar 1 to be accurately positioned. For individual steel bars that are not in place, they can be forced into position by pressing down the auxiliary hook after feeding.

[0071] The terms "first," "second," "first," or "second" as used in the various embodiments of this disclosure may modify various components regardless of their order and / or importance, but these terms do not limit the corresponding components. The above terms are configured only for the purpose of distinguishing an element from other elements. For example, "first user equipment" and "second user equipment" refer to different user equipments, although both are user equipment. For example, without departing from the scope of this disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0072] When a component (e.g., a first component) is referred to as being "(operably or communicatively) coupled" or "(operably or communicatively) coupled to" or "connected to" another component (e.g., a second component), it should be understood that the first component is directly connected to the second component or that the first component is indirectly connected to the second component via yet another component (e.g., a third component). Conversely, it can be understood that when a component (e.g., a first component) is referred to as being "directly connected" or "directly coupled" to another component (the second component), no component (e.g., a third component) is inserted between the two.

[0073] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0074] The above description is merely an optional embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

[0075] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A bidirectional bending and automatic diameter-changing large reinforcing bar bending forming apparatus, characterized by, The utility model relates to a steel bar bending machine, including: The upper feeding device is used for sending target steel bars into the bending work position of at least one bending main machine; The bending work assembly includes at least one bidirectional variable-diameter bending main machine, which is used for bending the target steel bars on a processing plane, and the bending work position of the bidirectional variable-diameter bending main machine is adjustable on a working horizontal line, and the bidirectional variable-diameter bending main machine automatically adjusts the bending direction and bending radius of the target steel bars; The unloading mechanism is used for transferring the target steel bars after processing by the bending work assembly into a collection bin; The bidirectional variable-diameter bending main machine includes a first bending shaft and a bidirectional variable-diameter bending mandrel; The bidirectional variable-diameter bending mandrel includes at least two forward bending heads and at least two reverse bending heads, the bending heads in each direction are stacked together in order of increasing radius, forming a forward bending head assembly and a reverse bending head assembly; the forward bending head assembly and the reverse bending head assembly are fixed on a first lifting mechanism, and the forward bending head assembly and the reverse bending head assembly are fixed on the same horizontal line, and a first bending work position is formed between the forward bending head assembly and the reverse bending head assembly; the first lifting mechanism pushes the corresponding bending heads into or out of the processing plane through lifting movement; On the processing plane, the first bending shaft moves along a first arc-shaped track to push the target steel bars to bend in a first direction with the forward bending heads on the processing plane as supports or to bend in a second direction with the reverse bending heads on the processing plane as supports, the first direction and the second direction being opposite; The first bending shaft is arranged on a second lifting mechanism, and the second lifting mechanism pushes the first bending shaft into or out of the processing plane through lifting movement; The bending work assembly includes an auxiliary bending main machine, which can cooperate with the bidirectional variable-diameter bending main machine to bend the target steel bars to meet various processing requirements; The bidirectional variable-diameter bending main machine exits the processing plane through sinking movement of the first lifting mechanism and / or the second lifting mechanism to avoid the target steel bars; the subsequent bending process is continuously processed by the auxiliary bending main machine; The auxiliary bending main machine also exits the processing plane through sinking movement of the corresponding lifting mechanism to avoid the target steel bars; The auxiliary bending main machine includes at least one of a general bending main machine, a sheep horn type bending main machine, and a unidirectional variable-diameter bending main machine; The unidirectional variable-diameter bending main machine includes a second bending shaft and a unidirectional variable-diameter bending mandrel; The unidirectional variable-diameter bending mandrel includes at least two bending heads stacked together in order of increasing radius, forming a bending head assembly, and the tangent position of the bending head assembly and the working horizontal line is a second bending work position. ​ The bending head assembly is fixed on a third lifting mechanism, which pushes the corresponding bending head into or out of the processing plane through lifting movement; The second bending shaft is arranged on a fourth lifting mechanism, which pushes the second bending shaft into or out of the processing plane through lifting movement; The bending forming equipment further comprises an anti-collision mechanism which can be telescoped in the direction perpendicular to the processing plane to lift the bent steel bar part.

2. The large steel bar bending forming equipment of bidirectional bending and automatic variable diameter according to claim 1, characterized in that, The first lifting mechanism and the third lifting mechanism are the same device; The second lifting mechanism and the fourth lifting mechanism are the same device.

3. The bidirectional bending and automatic variable-diameter large steel bar product bending forming apparatus according to claim 1, characterized by, Further comprising an auxiliary feeding mechanism; The auxiliary feeding mechanism comprises a first telescopic assembly and an auxiliary hook arranged at the end of the first telescopic assembly, and the first telescopic assembly can be telescoped in the direction perpendicular to the processing plane.

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