Position error proofing double-channel synchronous bending header mechanism

Abstract

The application discloses a kind of position mistake-proof double-channel synchronous bending head mechanism, comprising: bending die mechanism, two channels are vertically arranged on it, and metal pipe middle part is arranged in two channels;Head mechanism, its top is provided with positioning hole, first head die and first head mechanism, and the bottom of head mechanism is provided with second head die and second head mechanism;Bending die mechanism is laterally opened and provided with two bending cavities, and bending assembly is arranged in bending cavity;Ground rail, bending die mechanism, head mechanism and bending die mechanism are driven and slidably arranged on it, and the outside of bending die mechanism is provided with positioning vertical plate.The application can solve the bending of common metal pipe, head device is independently designed, so that metal pipe processing efficiency, cycle compression is limited, and for metal pipe positioning is not sufficient, not in place, so that its processing quality is unstable, cannot reach production and use standard problem.

Description

Technical Field

[0001] This invention relates to the field of metal parts processing technology, specifically to a dual-channel synchronous bending and upsetting head mechanism with position error prevention. Background Technology

[0002] Metal pipes often require bending during processing to meet specific assembly and usage requirements. To facilitate mating with connectors, their ends need to be upset. However, common metal pipe bending and upsetting devices are typically designed independently, operating in two separate processes. This necessitates multiple disassemblies, repositioning, mold changes, and equipment downtimes, limiting processing efficiency and cycle time. Furthermore, insufficient or inadequate pipe positioning leads to inconsistent processing quality, failing to meet production and usage standards. Summary of the Invention

[0003] The purpose of this invention is to address the problems that common metal tube bending and upsetting devices are designed independently, which limits the processing efficiency and cycle time of metal tubes, and results in insufficient or inaccurate positioning of metal tubes, leading to unstable processing quality and failure to meet production and usage standards. Therefore, this invention provides a dual-channel synchronous bending and upsetting mechanism with position error prevention.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a dual-channel synchronous bending and upsetting head mechanism for positional error prevention, comprising:

[0005] A bending die mechanism has two vertically arranged channels, and the middle part of the metal tube passes through the two channels;

[0006] An upsetting mechanism is provided with a positioning hole at its top. A first upsetting mold and a first upsetting mechanism are provided outside the positioning hole. An upsetting cavity is provided with a side opening at the bottom of the upsetting mechanism. A second upsetting mold and a second upsetting mechanism are provided inside the upsetting cavity. The second upsetting mold includes a fixed upsetting mold located on one side of the upsetting cavity and a moving upsetting mold driven towards the fixed upsetting mold and provided on the other side of the upsetting cavity.

[0007] A bending die mechanism has two bending cavities with lateral openings. The metal tube extends from the perforation into the corresponding bending cavity. A bending assembly is installed in the bending cavity. The bending assembly of the upper bending cavity and the first upsetting head driven on the first upsetting head mechanism of the same height simultaneously perform a first bending and upsetting process on the end of the metal tube. The bending assembly of the lower bending cavity and the second upsetting head driven on the second upsetting head mechanism of the same height simultaneously perform a second bending and upsetting process on the opposite ends of the metal tube.

[0008] The ground rail has the bending fixed mold mechanism, upsetting head mechanism and bending moving mold mechanism slidably mounted on it, and the outer side of the bending moving mold mechanism is provided with a positioning plate.

[0009] As a further description of the above technical solution:

[0010] The channel has a lateral opening, and several first guide rollers are horizontally arranged inside it along the extension direction of the metal tube, and the metal tube is laterally pressed into the channel.

[0011] As a further description of the above technical solution:

[0012] The first upsetting die includes a tapered transition tube connected to the outside of the positioning hole and a straight tube extending from the outer end face of the transition tube toward the first upsetting part. The first upsetting mechanism is positioned on the upsetting mechanism by a base.

[0013] As a further description of the above technical solution:

[0014] The fixed mold of the upsetting head is provided with a first arc-shaped groove for positioning one end of the bent metal tube. The first arc-shaped groove is provided with a first forming groove at one end facing the second upsetting head. The moving mold of the upsetting head is provided with a second arc-shaped groove and a second forming groove corresponding to the first arc-shaped groove and the first forming groove. The first forming groove and the second forming groove both include a conical forming section and a straight tube forming section arranged sequentially facing the second upsetting head.

[0015] As a further description of the above technical solution:

[0016] The fixed mold of the upsetting head is provided with a number of guide posts, which are inserted into the first through hole of the moving mold of the upsetting head. A number of guide posts are provided at intervals on one side of the first arc-shaped groove.

[0017] As a further description of the above technical solution:

[0018] The bending assembly includes a winding assembly driven by a cylinder on the side of the bending moving mold mechanism, a plurality of pull ropes connected to the winding assembly, a sleeve assembly connected to the ends of the pull ropes, and a chain connector connecting adjacent sleeve assemblies. The sleeve assembly is fitted onto the metal tube, and the chain connector abuts against the bending concave surface of the metal tube.

[0019] As a further description of the above technical solution:

[0020] The pull ropes of both bending components are wound in the same direction on the stepped material roll of the winding component. The ends of the pull ropes are led out from the bending cavity through the second through hole. The winding surface size of the stepped material rolls connected to the pull ropes of several sleeve components extending toward the positioning plate gradually increases.

[0021] The bending cavity is provided with a second guide roller and a third guide roller for guiding the pull rope. The second guide roller is positioned on the bending cavity by a support. The second guide roller and the third guide roller are respectively provided with a first partition and a second partition for separating the pull rope.

[0022] As a further description of the above technical solution:

[0023] The sleeve assembly includes a fixed sleeve positioned inside the perforation and a movable sleeve, wherein a magnet for positioning is provided on the end face of the movable sleeve corresponding to the bending cavity.

[0024] As a further description of the above technical solution:

[0025] The chain connector includes several base plates and a hinge that hinges the fixed sleeve, the movable sleeve and the base plates. A flexible pad is provided on the side of the base plate facing the metal tube.

[0026] As a further description of the above technical solution:

[0027] An inductor module is provided at the contact points between the first upsetting head, the second upsetting head, and the positioning plate and the metal tube. The inductor module is associated with the drive device of the bending upsetting mechanism.

[0028] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0029] 1. This invention simplifies the mold changing and form-changing steps during metal tube processing by integrating metal tube bending and upsetting. This saves processing time and improves processing efficiency. Furthermore, by performing a preliminary bend at one end of the metal tube and then simultaneously upsetting the other end, the metal tube end is pre-tightened for positioning, avoiding poor processing quality caused by displacement. This achieves a positional error prevention function and simplifies the metal tube positioning process. The metal tube that has undergone one bend and upsetting in the upper channel can be placed in the lower channel for a second bend and upsetting. The processing in the upper and lower channels is carried out simultaneously, thereby achieving simultaneous bending and upsetting of both ends of the metal tube, further improving processing efficiency.

[0030] 2. The design is based on the bending process of metal pipe by connecting sleeves and using pull ropes for radial pulling. Multiple sleeves are set to pull the metal pipe body at multiple points, ensuring the bending stability of the metal pipe and avoiding excessive bending in some areas, which could lead to breakage. In addition, chain connectors and flexible pads are set between the sleeves to achieve uniform support of the metal pipe, further improving its bending stability and bending quality.

[0031] 3. An inductor module is installed. When the upper and lower metal tubes are connected, the inductor module contacts on the upsetting head and positioning plate will be fully connected before the signal is associated with the drive equipment of the bending and upsetting head mechanism to drive the processing. This ensures the stable positioning of the upper and lower dual-channel metal tubes and the quality of bending and upsetting processing. Attached Figure Description

[0032] 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.

[0033] Figure 1 This is a schematic diagram of a dual-channel synchronous bending upsetting head mechanism for positional error prevention.

[0034] Figure 2 This is a cross-sectional view of a dual-channel synchronous bending upsetting mechanism for positional error prevention.

[0035] Figure 3 This is a schematic diagram of the moving mold of the upsetting head in a dual-channel synchronous bending upsetting head mechanism for positional error prevention.

[0036] Figure 4 This is a cross-sectional view of the first upsetting die in a dual-channel synchronous bending upsetting mechanism for positional error prevention.

[0037] Figure 5 This is a cross-sectional view of the second upsetting die in a dual-channel synchronous bending upsetting mechanism for positional error prevention.

[0038] Figure 6 This is a cross-sectional view of the bending moving mold mechanism in a dual-channel synchronous bending and upsetting mechanism for positional error prevention, showing its usage status.

[0039] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0040] Legend:

[0041] 1. Bending fixed mold mechanism; 11. Channel; 12. First guide roller; 2. Upsetting head mechanism; 21. Positioning hole; 22. First upsetting head mold; 221. Conical transition tube; 222. Shaped straight tube; 23. First upsetting head mechanism; 231. Base; 232. First upsetting head component; 24. Upsetting head cavity; 25. Upsetting head fixed mold; 251. First arc-shaped groove; 252. First forming groove; 253. Guide post; 254. Conical forming section; 255. Straight tube forming section; 26. Upsetting head moving mold; 261. Second arc-shaped groove; 262. Second forming groove; 263. 27. First through hole; 27. Second upsetting head mechanism; 271. Second upsetting head component; 3. Bending moving die mechanism; 30. Through hole; 31. Bending cavity; 311. Second through hole; 32. Second guide roller; 321. Support; 322. First partition; 33. Third guide roller; 331. Second partition; 4. Ground rail; 5. Positioning upright plate; 6. Winding assembly; 61. Cylinder; 62. Stepped material roll; 7. Pull rope; 8. Sleeve assembly; 81. Fixed sleeve; 82. Movable sleeve; 9. Chain connector; 91. Base plate; 92. Hinge; 100. Metal tube. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Please see Figure 1-7 This invention provides a technical solution: a dual-channel synchronous bending and upsetting head mechanism for positional error prevention, comprising:

[0045] The bending die mechanism 1 has two vertically arranged channels 11, and the metal tube 100 passes through the two channels 11 in the middle.

[0046] The upsetting head mechanism 2 has a positioning hole 21 at its top. A first upsetting head mold 22 and a first upsetting head mechanism 23 are arranged outside the positioning hole 21. The bottom of the upsetting head mechanism 2 has a side opening for an upsetting head cavity 24. A second upsetting head mold and a second upsetting head mechanism 27 are arranged inside the upsetting head cavity 24. The second upsetting head mold includes an upsetting head fixed mold 25 located on one side of the upsetting head cavity 24 and a driving device facing the upsetting head fixed mold 25. An upsetting moving mold 26 is placed on the other side of the upsetting cavity 24; wherein, the upsetting fixed mold 25 and the upsetting moving mold 26 are assembled in the upsetting cavity 24 in a quick-release manner to facilitate mold replacement and to position the bending points of metal tubes 100 with different bends and angles. The second upsetting mechanism 27 is designed with an adjustable sliding track drive within the upsetting cavity 24 to perform corresponding metal tube 100 position docking and upsetting processing.

[0047] The bending moving die mechanism 3 has two bending cavities 31 with lateral openings. The metal tube 100 extends from the through hole 30 into the corresponding bending cavity 31. Bending components are provided in the bending cavity 31. The bending component of the upper bending cavity 31 and the first upsetting head 232 driven on the first upsetting head mechanism 23 of the same height perform a single bending and upsetting process on the end of the metal tube 100 simultaneously. The bending component of the lower bending cavity 31 and the second upsetting head 271 driven on the second upsetting head mechanism 27 of the same height perform a second bending and upsetting process on the opposite end of the metal tube 100 simultaneously.

[0048] The ground rail 4 is driven and slidably mounted on which the bending fixed mold mechanism 1, the upsetting head mechanism 2, and the bending moving mold mechanism 3 are mounted. The outer side of the bending moving mold mechanism 3 is provided with a positioning plate 5.

[0049] In use, the center of the original metal tube 100 is positioned in the upper channel 11, and one end is inserted into the positioning hole 21 and the first upsetting die 22, abutting against the first upsetting part 232. After one bending, the bent end of the metal tube 100 semi-finished product is initially positioned on the upsetting die 25, and its end abuts against the second upsetting part 271. The center of the metal tube 100 is positioned in the lower channel 11, and the moving upsetting die 26 is driven to close with the fixed upsetting die 25 to close the die and position the end of the metal tube 100. Thus, the process is completed. After the initial positioning of the metal tubes 100 in the two channels 11, the bending fixed mold mechanism 1 and the upsetting head mechanism 2 are pushed or driven to move towards the bending moving mold mechanism 3, so that the unpositioned ends of the metal tubes 100 in the two channels 11 pass through the through holes 30 and are positioned on the bending assembly. At the same time, their end faces abut against the positioning upright plate 5, completing the positioning. Then, the bending assembly is driven to perform synchronous preliminary bending of the two metal tubes 100. When the set value is reached (which can be set as bending processing time or angle), the upsetting head is driven to perform upsetting processing on the ends of the two metal tubes 100. After processing is completed, the metal tube in the lower channel 11 is processed and removed, and the upper metal tube 100 is removed and moved to the lower channel 11. The original metal tube 100 is positioned in the upper channel 11. The above steps are repeated to perform secondary bending of the metal tube and synchronous upsetting processing.

[0050] This invention simplifies the mold changing and form-changing steps during metal tube processing by integrating metal tube bending and upsetting into a single design. This saves processing time and improves processing efficiency. Furthermore, by performing a preliminary bend at one end of the metal tube before simultaneously upsetting the other end, the end of the metal tube is pre-tightened for positioning, preventing displacement that could lead to poor processing quality. This achieves a positional error prevention function and simplifies the metal tube positioning process. The metal tube that has undergone one bend and upsetting in the upper channel can be placed in the lower channel for a second bend and upsetting, with processing in both channels occurring simultaneously. This allows for simultaneous bending and upsetting of both ends of the metal tube, further improving processing efficiency.

[0051] The channel 11 is laterally open, and several first guide rollers 12 are horizontally arranged inside it along the extension direction of the metal tube 100. The metal tube 100 is laterally pressed into the channel 11. The above design can ensure the overall horizontality of the metal tube 100 after it is positioned in the bending fixed mold mechanism 1, so as to ensure the convenience and stability of the metal tube 100 docking with the upsetting head mechanism 2 and the bending moving mold mechanism 3.

[0052] The first upsetting die 22 includes a tapered transition tube 221 connecting the outside of the positioning hole 21 and a straight tube 222 extending from the outer end face of the transition tube 221 toward the first upsetting part 232. The first upsetting mechanism 23 is positioned on the upsetting mechanism 2 by a base 231. During one upsetting process, due to the initial positioning of the first guide roller 12, the positioning hole 21, and the through hole 30, and the initial bending of the end of the metal tube 100, the upper metal tube 100 is fully positioned, such as... Figure 3 As shown, the first upsetting head 232 is driven to press the other end of the metal tube 100, so that it is stably shrinking and deforming inward under the guidance of the inner cavity of the first upsetting head mold 22, and upsetting. The end of the metal tube and the connection between the end and the undeformed tube section are stably supported, guided and shaped by the shaping straight tube 222 and the transition tube section 221.

[0053] The fixed mold 25 of the upsetting head is provided with a first arc-shaped groove 251 for positioning one end of the bent metal tube 100. The first arc-shaped groove 251 is provided with a first forming groove 252 at one end facing the second upsetting head 271. The moving mold 26 of the upsetting head is provided with a second arc-shaped groove 261 and a second forming groove 262 corresponding to the first arc-shaped groove 251 and the first forming groove 252. The first forming groove 252 and the second forming groove 262 each include a conical forming section 254 and a straight tube forming section 255 arranged sequentially facing the second upsetting head 271. Before the secondary upsetting process, the bent portion of the metal tube 100 is embedded in the first arc-shaped groove 251, with its end passing through the first forming groove 252 and abutting against the second upsetting head 271. Then, the moving upsetting die 26 is driven to close with the fixed upsetting die 25, completing the initial positioning of the lower metal tube 100. Afterward, the bending assembly performs the initial bending of the lower metal tube 100. Then, the second upsetting head 271 is driven to perform the secondary upsetting process on the lower metal tube 100. Figure 4 As shown, the second upsetting head 271 is driven to stamp the bent end of the metal tube 100. The tapered forming section 254 and the straight tube forming section 255 provide stable support, guidance and shaping for the end of the metal tube and the connection between the end and the undeformed tube section, ensuring the secondary upsetting processing and forming quality of the bent end.

[0054] The fixed mold 25 of the upsetting head is provided with a number of guide posts 253, which are inserted into the first through hole 263 of the moving mold 26 of the upsetting head. As a conventional mold opening and closing structure design, it improves the stability of mold opening and closing. A number of guide posts 253 are provided at intervals on one side of the protrusion of the first arc groove 251 to improve the strength of the mold structure. This avoids the misalignment of the front and rear molds when the upsetting head and the mold are used to press the metal tube 100 and the mold side is under pressure. It also avoids the uneven support of the forming grooves of the two molds on the outside of the metal tube 100, which may lead to the metal tube 100 and its upsetting part axis being offset, or even the upsetting part and bending part breaking, and the upsetting head processing not meeting the standards.

[0055] like Figure 1 , 2 6, 7, The bending assembly includes a winding assembly 6 driven by a cylinder 61 to rotate on the side of the bending moving mold mechanism 3, several pull ropes 7 connected to the winding assembly 6, a sleeve assembly 8 connected to the ends of the pull ropes 7, and a chain connector 9 connecting adjacent sleeve assemblies 8. The sleeve assembly 8 is fitted onto the metal tube 100, and the chain connector 9 abuts against the bending concave surface of the metal tube 100. Based on the design of bending the metal tube 100 by sleeves and pull ropes pulling radially, multiple sleeves are set to pull the metal tube 100 at multiple points, ensuring the bending stability of the metal tube 100 and avoiding excessive bending in some areas, which could lead to breakage. Furthermore, the chain connector 9 between the sleeves provides uniform support for the metal tube 100, further improving its bending stability and bending quality.

[0056] Both bending components have their drawstrings 7 wound in the same direction around the stepped roll 62 of the winding component 6. The ends of the drawstrings 7 are led out from the bending cavity 31 through the second through hole 311. The winding surface size of the stepped roll 62 connected to the drawstrings 7 on several sleeve components 8 extending towards the positioning plate 5 gradually increases. A second guide roller 32 and a third guide roller 33 are provided inside the bending cavity 31 to guide the drawstrings 7. The second guide roller 32 is positioned on the bending cavity 31 by a support 321. A first partition 322 and a second partition 331 are respectively provided on the second guide roller 32 and the third guide roller 33 to separate the drawstrings 7. With the above design, multiple drawstrings 7 can be wound and tightened synchronously by a single rotary drive mechanism. The sleeve component 8 away from the perforation 30 is lifted more by tension, thereby realizing multi-point pulling and arc bending of the metal tube 100.

[0057] The sleeve assembly 8 includes a fixed sleeve 81 positioned inside the perforation 30 and a movable sleeve 82. A magnet for positioning is provided on the end face of the movable sleeve 82 corresponding to the bending cavity 31. In order to facilitate the removal of the metal tube 100 after bending, both sleeves adopt a structure in which two semi-circular ring-shaped clamps are hinged at one end and detachably fixed by a pin or bolt at the other end.

[0058] The chain connector 9 includes several base plates 91 and a hinge 92 that hinges the fixed sleeve 81, the movable sleeve 82 and the base plates 91. A flexible pad is provided on the side of the base plate 91 facing the metal tube 100.

[0059] When the metal tube 100 is positioned, its end is pressed into the bending cavity 31 through the through hole 30, and then passes through the fixed sleeve 81 and the movable sleeve 82 in sequence and abuts against the positioning plate 5. At this time, the chain connector 9 is straight and the movable sleeve 82 is magnetically positioned on the end face of the bending cavity 31 to facilitate the insertion of the metal tube 100. The flexible pad abuts against the surface of the metal tube 100. During operation, the cylinder 61 drives the winding assembly 6 to rotate and wind the pull rope 7. The end of the pull rope 7 pulls the movable sleeve 82, causing it to separate from the end face of the bending cavity 31 and driving the metal tube 100 to bend. Based on the multi-point pulling of multiple movable sleeves 82, and with the support of the concave surface of the metal tube 100 by the chain connector 9 and the flexible pad, the bending stability and uniformity are ensured, thereby improving the bending forming quality.

[0060] In another embodiment, inductor modules are provided at the contact points between the first upsetting head 232, the second upsetting head 271, and the positioning plate 5 and the metal tube. These inductor modules are associated with the drive device of the bending and upsetting mechanism. This design ensures that when the upper and lower metal tubes 100 are joined, the bending and upsetting mechanism will only be driven via signal association when all contacts of the inductor modules on the upsetting head and positioning plate 5 are fully engaged. This guarantees stable positioning of the upper and lower dual-channel metal tubes and ensures the quality of bending and upsetting processing.

[0061] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dual-channel synchronous bending and upsetting head mechanism for positional error prevention, characterized in that, include: A bending die mechanism has two vertically arranged channels, and the middle part of the metal tube passes through the two channels; An upsetting mechanism is provided with a positioning hole at its top. A first upsetting mold and a first upsetting mechanism are provided outside the positioning hole. An upsetting cavity is provided with a side opening at the bottom of the upsetting mechanism. A second upsetting mold and a second upsetting mechanism are provided inside the upsetting cavity. The second upsetting mold includes a fixed upsetting mold located on one side of the upsetting cavity and a moving upsetting mold driven towards the fixed upsetting mold and provided on the other side of the upsetting cavity. A bending die mechanism has two bending cavities with lateral openings. The metal tube extends from the perforation into the corresponding bending cavity. A bending assembly is installed in the bending cavity. The bending assembly of the upper bending cavity and the first upsetting head driven on the first upsetting head mechanism of the same height simultaneously perform a first bending and upsetting process on the end of the metal tube. The bending assembly of the lower bending cavity and the second upsetting head driven on the second upsetting head mechanism of the same height simultaneously perform a second bending and upsetting process on the opposite ends of the metal tube. The ground rail has the bending fixed mold mechanism, upsetting head mechanism and bending moving mold mechanism slidably mounted on it, and the outer side of the bending moving mold mechanism is provided with a positioning plate; The fixed mold of the upsetting head is provided with a first arc-shaped groove for positioning one end of the bent metal tube. The first arc-shaped groove is provided with a first forming groove at one end facing the second upsetting head. The moving mold of the upsetting head is provided with a second arc-shaped groove and a second forming groove corresponding to the first arc-shaped groove and the first forming groove. The first forming groove and the second forming groove each include a conical forming section and a straight tube forming section arranged sequentially facing the second upsetting head. The bending assembly includes a winding assembly driven by a cylinder on the side of the bending moving mold mechanism, a plurality of pull ropes connected to the winding assembly, a sleeve assembly connected to the ends of the pull ropes, and a chain connector connected between adjacent sleeve assemblies. The sleeve assembly is fitted onto the metal tube, and the chain connector abuts against the bending concave surface of the metal tube. The draw ropes of both bending assemblies are wound in the same direction on the stepped material roll of the winding assembly. The ends of the draw ropes are led out from the bending cavity through the second through hole. The winding surface size of the stepped material rolls connected to the draw ropes on several sleeve assemblies extending toward the positioning plate gradually increases. A second guide roller and a third guide roller are provided in the bending cavity for guiding the draw ropes. The second guide roller is positioned on the bending cavity by a support. A first partition and a second partition for separating the draw ropes are respectively provided on the second guide roller and the third guide roller.

2. The dual-channel synchronous bending and upsetting head mechanism for position error prevention according to claim 1, characterized in that, The channel has a lateral opening, and several first guide rollers are horizontally arranged inside it along the extension direction of the metal tube, and the metal tube is laterally pressed into the channel.

3. The dual-channel synchronous bending and upsetting head mechanism for position error prevention according to claim 1, characterized in that, The first upsetting die includes a tapered transition tube connected to the outside of the positioning hole and a straight tube extending from the outer end face of the tapered transition tube toward the first upsetting part. The first upsetting mechanism is positioned on the upsetting mechanism by a base.

4. The dual-channel synchronous bending and upsetting head mechanism for position error prevention according to claim 1, characterized in that, The fixed mold of the upsetting head is provided with a number of guide posts, which are inserted into the first through hole of the moving mold of the upsetting head. A number of guide posts are provided at intervals on one side of the first arc-shaped groove.

5. The dual-channel synchronous bending and upsetting head mechanism for position error prevention according to claim 1, characterized in that, The sleeve assembly includes a fixed sleeve positioned inside the perforation and a movable sleeve, wherein a magnet for positioning is provided on the end face of the movable sleeve corresponding to the bending cavity.

6. The dual-channel synchronous bending and upsetting head mechanism for position error prevention according to claim 5, characterized in that, The chain connector includes several base plates and a hinge that hinges the fixed sleeve, the movable sleeve and the base plates. A flexible pad is provided on the side of the base plate facing the metal tube.

7. The dual-channel synchronous bending and upsetting head mechanism for position error prevention according to claim 1, characterized in that, An inductor module is provided at the contact points between the first upsetting head, the second upsetting head, and the positioning plate and the metal tube. The inductor module is associated with the drive device of the bending upsetting mechanism.

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