Position-error-proof double-channel synchronous bending upset head mechanism

Abstract

The invention discloses a position-error-proof double-channel synchronous bending upset head mechanism, which comprises a bending fixed die mechanism, a bending fixed die mechanism, a position-error-proof mechanism and a position-error-proof mechanism, and is characterized in that two channels are vertically arranged on the bending fixed die mechanism, and the middle part of a metal pipe is arranged in the two channels in a penetrating manner; a positioning hole, a first upset head die and a first upset head mechanism are arranged at the top of the upset head mechanism, and a second upset head die and a second upset head mechanism are arranged at the bottom of the upset head mechanism; two bending cavities are formed in a lateral opening of the bending movable die mechanism, and bending assemblies are arranged in the bending cavities; a bending fixed die mechanism, an upset head mechanism and a bending movable die mechanism are arranged on the ground rail in a driving and sliding mode, and a positioning vertical plate is arranged on the outer side of the bending movable die mechanism. The metal pipe bending and heading device can solve the problems that due to the fact that bending and heading devices of common metal pipes are independently designed, the machining efficiency and periodic compression of the metal pipes are limited, positioning of the metal pipes is insufficient and not in place, the machining quality of the metal pipes is unstable, and production and use standards cannot be met.

Description

Technical Field

[0001] The invention relates to the technical field of metal parts processing, in particular to a position error-proof double-channel synchronous bending and upsetting head mechanism. Background Art

[0002] When processing metal tubes, they often need to be bent to meet specific assembly and use requirements. In order to facilitate the connection with the connector, the ends need to be upset. However, the bending and upsetting devices of common metal tubes are designed independently and operate in two processes. During this period, the metal tubes need to be disassembled, positioned, changed and replaced by molds, and the equipment needs to be shut down many times, which limits the efficiency and cycle of metal tube processing. Insufficient positioning of metal tubes makes their processing quality unstable and cannot meet production and use standards. Summary of the invention

[0003] The purpose of the present invention is to provide a dual-channel synchronous bending and upsetting mechanism with position error prevention in order to solve the problems that the bending and upsetting devices of common metal tubes are all designed independently, which limits the metal tube processing efficiency and cycle compression, and the metal tube is not positioned sufficiently and in place, resulting in unstable processing quality and failure to meet production and use standards.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a dual-channel synchronous bending and upsetting head mechanism with position error prevention, comprising:

[0005] The bending fixed die mechanism has two vertical channels, and the middle part of the metal tube is passed through the two channels;

[0006] A heading mechanism, a positioning hole is arranged on the top, a first heading die and a first heading mechanism are arranged outside the positioning hole, a heading cavity is arranged at a lateral opening at the bottom of the heading mechanism, a second heading die and a second heading mechanism are arranged in the heading cavity, and the second heading die includes a heading fixed die located on one side of the heading cavity and a heading movable die arranged on the other side of the heading cavity and driven toward the heading fixed die;

[0007] The bending movable die mechanism has two bending cavities at its side opening, the metal tube extends from the perforation into the corresponding bending cavity, a bending assembly is arranged in the bending cavity, the bending assembly of the upper bending cavity and a first upsetting member driven and arranged on a first upsetting mechanism at the same height respectively perform a primary bending and upsetting process on the end of the metal tube synchronously, and the bending assembly of the lower bending cavity and a second upsetting member driven and arranged on a second upsetting mechanism at the same height respectively perform a secondary bending and upsetting process on the opposite end of the metal tube synchronously;

[0008] The ground rail has the bending fixed die mechanism, the upsetting head mechanism and the bending movable die mechanism driven and slidably arranged thereon, and a positioning vertical plate is arranged on the outer side of the bending movable die mechanism.

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

[0010] The channel is open laterally, and a plurality of first guide rollers are horizontally arranged in the channel along the extending direction of the metal tube, and the metal tube is pressed laterally into the channel.

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

[0012] The first upsetting die comprises a conical transition pipe connected to the outer side of the positioning hole and a shaped straight pipe extending from the outer end surface of the transition pipe section toward the first upsetting piece, and the first upsetting mechanism is positioned on the upsetting mechanism through a base.

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

[0014] The fixed die of the upsetting head is provided with a first arc-shaped groove for sleeve positioning of one end of the bent metal tube, and the first arc-shaped groove is provided with a first forming groove toward one end of the second upsetting head piece, and the movable die 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, and the first forming groove and the second forming groove both include a conical forming section and a straight tube forming section which are sequentially arranged toward the second upsetting head piece.

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

[0016] A plurality of guide pillars are arranged on the fixed die of the upsetting head, and the guide pillars are correspondingly inserted into the first through holes of the movable die of the upsetting head, and a plurality of the guide pillars are arranged at intervals on one side of the protrusion of the first arc-shaped groove.

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

[0018] The bending assembly includes a winding assembly arranged on the side of the bending movable mold mechanism by a cylinder rotation drive, 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 sleeved on 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 draw ropes of the two bending assemblies are both wound in the same direction on the stepped material roll of the winding assembly, and the ends of the draw ropes are led out of the bending cavity through the second through hole, and the winding surface size of the stepped material roll portion connected to the draw ropes on the plurality of sleeve assemblies extending toward the positioning vertical plate gradually increases;

[0021] A second guide roller and a third guide roller for guiding the pull rope are arranged in the bending cavity, the second guide roller is positioned on the bending cavity through a support, and a first partition plate and a second partition plate for separating the pull rope are respectively arranged on the second guide roller and the third guide roller.

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

[0023] The sleeve assembly comprises a fixed sleeve and a movable sleeve positioned inside the through hole, and a magnet for positioning is arranged on the end surface of the movable sleeve corresponding to the bending cavity.

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

[0025] The chain-type connecting piece comprises a plurality of base plates and hinges for hingedly connecting the fixed sleeve, the movable sleeve and the base plate. A flexible cushion layer is arranged on one side of the base plate facing the metal pipe.

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

[0027] The first upsetting piece, the second upsetting piece and the abutting parts of the positioning vertical plate and the metal tube are all provided with inductance modules, and the inductance modules are associated with the driving 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. The present invention simplifies the mold replacement and mold changing steps during metal tube processing through the integrated design of metal tube bending and upsetting processing, saves processing flow and time, and improves processing efficiency. In addition, by first performing preliminary bending on one end of the metal tube and then performing synchronous upsetting processing on the other end, the positioning and pre-tightening of the end of the metal tube is achieved, thereby avoiding the problem of poor processing quality caused by its displacement, realizing the position error prevention function, and simplifying the metal tube positioning process. The metal tube that has completed one bending and upsetting processing in the upper channel can be placed in the lower channel for secondary bending and upsetting processing, and the processing of the upper and lower channels is performed synchronously, thereby achieving synchronous bending and upsetting of the two ends of the metal tube, further improving processing efficiency.

[0030] 2. Based on the design of bending the metal tube by sleeve connection and radial pulling of the pull rope, multiple sleeves are set to pull the metal tube body at multiple points to ensure the bending stability of the metal tube and avoid excessive local bending and breakage. Chain connectors are set between the sleeves to cooperate with flexible cushions to achieve uniform support of the metal tube, further improving its bending stability and bending forming quality.

[0031] 3. An inductor module is set up. When the upper and lower metal tubes are connected, only when the inductor module contacts on the upsetting piece and the positioning vertical plate are fully connected, the driving device of the bending and upsetting mechanism will be driven through the signal-related processing, thereby ensuring the stable positioning of the upper and lower double-channel metal tubes and the quality of bending and upsetting processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 The schematic diagram is a structural diagram of a dual-channel synchronous bending and upsetting head mechanism with position error prevention.

[0034] Figure 2 The cross-sectional view is of a dual-channel synchronous bending and upsetting head mechanism with position error prevention.

[0035] Figure 3 The present invention is a structural schematic diagram of a moving die of a heading head in a dual-channel synchronous bending heading head mechanism with position error prevention.

[0036] Figure 4 The present invention is a cross-sectional view of the first upsetting die in a dual-channel synchronous bending upsetting mechanism with position error prevention.

[0037] Figure 5 The present invention is a cross-sectional view of the second upsetting die in a dual-channel synchronous bending upsetting mechanism with position error prevention.

[0038] Figure 6 The present invention is a cross-sectional view of the use status of a bending movable die mechanism in a dual-channel synchronous bending upsetting head mechanism with position error prevention.

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

[0040] Legend:

[0041] 1. Bending fixed die mechanism; 11. Channel; 12. First guide roller; 2. Heading mechanism; 21. Positioning hole; 22. First heading die; 221. Conical transition pipe; 222. Forming straight pipe; 23. First heading mechanism; 231. Base; 232. First heading piece; 24. Heading cavity; 25. Heading fixed die; 251. First arc groove; 252. First forming groove; 253. Guide column; 254. Conical forming section; 255. Straight tube forming section; 26. Heading movable die; 261. Second arc groove; 262. Second forming groove; 263. The first through hole; 27, the second upsetting mechanism; 271, the second upsetting piece; 3, the bending movable mold mechanism; 30, the perforation; 31, the bending cavity; 311, the second through hole; 32, the second guide roller; 321, the support; 322, the first partition; 33, the third guide roller; 331, the second partition; 4, the ground rail; 5, the positioning vertical plate; 6, the winding assembly; 61, the cylinder; 62, the stepped material roll; 7, the pull rope; 8, the sleeve assembly; 81, the fixed sleeve; 82, the movable sleeve; 9, the chain connector; 91, the base plate; 92, the hinge; 100, the metal tube. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] See also Figure 1-7 The present invention provides a technical solution: a dual-channel synchronous bending and upsetting head mechanism with position error prevention, comprising:

[0045] The bending fixed die mechanism 1 has two vertical channels 11, and the middle part of the metal tube 100 is passed through the two channels 11;

[0046] The upsetting mechanism 2 has a positioning hole 21 at the top, a first upsetting die 22 and a first upsetting mechanism 23 are arranged outside the positioning hole 21, a upsetting cavity 24 is arranged at the lateral opening at the bottom of the upsetting mechanism 2, a second upsetting die and a second upsetting mechanism 27 are arranged in the upsetting cavity 24, and the second upsetting die includes an upsetting fixed die 25 located on one side of the upsetting cavity 24 and a driving device 27 toward the upsetting fixed die 25. The upsetting head movable die 26 is arranged on the other side of the upsetting head cavity 24; wherein, the upsetting head fixed die 25 and the upsetting head movable die 26 are assembled in the upsetting head cavity 24 by a quick-release method, so as to facilitate the replacement of the die and to position the bending parts of the metal tubes 100 with different bending and angle shapes. The second upsetting head mechanism 27 is designed to be adjustable by a track-driven sliding type in the upsetting head cavity 24, so as to carry out the corresponding metal tube 100 position docking and upsetting processing.

[0047] The bending movable die mechanism 3 has two bending cavities 31 at its lateral opening, the metal tube 100 extends from the perforation 30 into the corresponding bending cavity 31, a bending assembly is arranged in the bending cavity 31, the bending assembly of the upper bending cavity 31 and the first upsetting member 232 driven and arranged on the first upsetting mechanism 23 at the same height respectively perform a primary bending and upsetting process on the end of the metal tube 100 synchronously, and the bending assembly of the lower bending cavity 31 and the second upsetting member 271 driven and arranged on the second upsetting mechanism 27 at the same height respectively perform a secondary bending and upsetting process on the opposite end of the metal tube 100 synchronously;

[0048] The ground rail 4 has the bending fixed die mechanism 1, the heading mechanism 2 and the bending movable die mechanism 3 driven and slidably arranged thereon, and a positioning vertical plate 5 is arranged on the outer side of the bending movable die mechanism 3.

[0049] When in use, the center of the original metal tube 100 is positioned in the upper channel 11, and one end thereof is inserted into the positioning hole 21 and the first upsetting die 22 and abuts against the first upsetting piece 232; the bent end of the semi-finished metal tube 100 after one bending and upsetting is initially positioned on the upsetting fixed die 25, and its end abuts against the second upsetting piece 271, and the center of the metal tube 100 is positioned in the lower channel 11, and the upsetting movable die 26 and the upsetting fixed die 25 are driven to close, and the mold is closed and the end of the metal tube 100 is positioned, thereby completing After the initial positioning of the metal tubes 100 of the two channels 11, the bending fixed die mechanism 1 and the upsetting mechanism 2 are pushed or driven to move toward the bending movable die mechanism 3, so that the unpositioned ends of the metal tubes 100 of the two channels 11 penetrate into the perforations 30 and are positioned on the bending assembly. At the same time, their end faces abut against the positioning vertical plate 5 to complete the positioning; then the bending assembly is driven first to perform the synchronous initial bending of the two metal tubes 100, and when the set value (which can be set as the bending processing time or angle) is reached, the upsetting component is driven to perform the upsetting processing of the ends of the two metal tubes 100. After the processing is completed, the metal tube of the lower channel 11 is processed and taken out, and the upper metal tube 100 is removed and moved to the lower channel 11. The original tube of the metal tube 100 is positioned in the upper channel 11, and the above steps are repeated to perform the secondary bending and upsetting processing of the metal tube.

[0050] The present invention simplifies the steps of mold replacement and mold changing during metal tube processing through the integrated design of metal tube bending and upsetting processing, saves processing flow and time, and improves processing efficiency. In addition, by initially bending one end of the metal tube and then synchronously upsetting the other end, positioning and pre-tightening of the end of the metal tube is achieved, thereby avoiding the problem of poor processing quality caused by its displacement, realizing the position error prevention function, and simplifying the metal tube positioning process. The metal tube that has completed one bending and upsetting processing in the upper channel can be placed in the lower channel for secondary bending and upsetting processing, and the processing of the upper and lower channels is carried out synchronously, thereby achieving synchronous bending and upsetting of the two ends of the metal tube, further improving processing efficiency.

[0051] The channel 11 is open laterally, and a plurality of first guide rollers 12 are horizontally arranged in the channel along the extending direction of the metal tube 100, and 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 being positioned in the bending fixed die mechanism 1, so as to ensure the convenience and stability of the metal tube 100 and the heading mechanism 2 and the bending movable die mechanism 3.

[0052] The first upsetting die 22 includes a conical transition pipe 221 connected to the outer side of the positioning hole 21 and a shaped straight pipe 222 extending from the outer end surface of the transition pipe section 221 toward the first upsetting member 232. The first upsetting mechanism 23 is positioned on the upsetting mechanism 2 through the base 231. During the first 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 has been fully positioned, such as Figure 3 As shown, the first upsetting piece 232 is driven to punch the other end of the metal tube 100, so that it stably shrinks and deforms inward and is upset under the guidance of the inner cavity of the first upsetting die 22, and the end of the metal tube and the connection between the end and the undeformed tube section are stably supported, guided and shaped through the shaped straight tube 222 and the transition tube section 221.

[0053] The upsetting head fixed die 25 is provided with a first arc groove 251 for sleeve positioning of one end of the metal tube 100 after bending, and the first arc groove 251 is provided with a first forming groove 252 at one end of the second upsetting head piece 271, and the upsetting head movable die 26 is provided with a second arc groove 261 and a second forming groove 262 corresponding to the first arc groove 251 and the first forming groove 252, and the first forming groove 252 and the second forming groove 262 both include a conical forming section 254 and a straight tube forming section 255 which are sequentially arranged toward the second upsetting head piece 271. Before the secondary upsetting process, the primary bending portion of the metal tube 100 is embedded in the first arc groove 251, and its end portion passes through the first forming groove 252 and abuts against the second upsetting piece 271. Then, the upsetting movable die 26 is driven to close with the upsetting fixed die 25. After the lower metal tube 100 is initially positioned, the bending assembly performs the initial bending on the lower metal tube 100. Then, the second upsetting piece 271 is driven to perform the secondary upsetting process on the lower metal tube 100, as shown in FIG. Figure 4 As shown, the second upsetting piece 271 is driven to punch the bent end of the metal tube 100, and the conical forming section 254 and the straight tube forming section 255 are used to stably support, guide and shape the end of the metal tube and the connection between the end and the undeformed tube section, thereby ensuring the secondary upsetting processing and forming quality of the bent end.

[0054] A plurality of guide pillars 253 are arranged on the upsetting head fixed die 25, and the guide pillars 253 are correspondingly inserted into the first through holes 263 of the upsetting head movable die 26, as a conventional mold opening and closing mold structure design, to improve the stability of the opening and closing mold, a plurality of guide pillars 253 are arranged at intervals on one side of the protrusion of the first arc-shaped groove 251, to improve the structural strength of the mold, to avoid the front and rear molds being misaligned when the upsetting head cooperates with the mold to stamp the metal tube 100 and the side of the mold is under pressure, and the forming grooves of the two molds support the outer side of the metal tube 100 unevenly, resulting in the metal tube 100 and its upsetting part The axis is offset or even the upsetting part and the bending part are broken, and the upsetting head processing does not meet the standards.

[0055] like Figure 1 , 2 , 6, 7, the bending assembly includes a winding assembly 6 that is rotationally driven by a cylinder 61 on the side of the bending movable mold mechanism 3, a plurality of pull ropes 7 connected to the winding assembly 6, a sleeve assembly 8 connecting the ends of the pull ropes 7, and a chain connector 9 connected between adjacent sleeve assemblies 8, the sleeve assembly 8 is sleeved on 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 sleeve connection of the sleeve and radial pulling of the pull rope, multiple sleeves are set to pull the metal tube 100 at multiple points to ensure the bending stability of the metal tube 100 and avoid excessive local bending that leads to breakage, and chain connectors 9 are set between the sleeves to achieve uniform support of the metal tube 100, further improving its bending stability and bending forming quality.

[0056] The draw ropes 7 of the two bending assemblies are both wound in the same direction on the stepped material roll 62 of the winding assembly 6. The end of the draw rope 7 is led out from the bending cavity 31 through the second through hole 311. The winding surface size of the stepped material roll 62 connected to the draw ropes 7 on the several sleeve assemblies 8 extending toward the positioning vertical plate 5 gradually increases. The second guide roller 32 and the third guide roller 33 for guiding the draw rope 7 are arranged in the bending cavity 31. The second guide roller 32 is positioned on the bending cavity 31 through the support 321. The first partition 322 and the second partition 331 for separating the draw ropes 7 are respectively arranged on the second guide roller 32 and the third guide roller 33. Through the above design, multiple draw ropes 7 can be synchronously wound and tightened through a single rotary drive mechanism, and the pulling and lifting height of the sleeve assembly 8 away from the perforation 30 is increased, thereby realizing multi-point pulling and arc bending of the metal tube 100.

[0057] The sleeve assembly 8 includes a fixed sleeve 81 and a movable sleeve 82 positioned inside the through hole 30, and a magnet for positioning is arranged on the end surface of the movable sleeve 82 corresponding to the bending cavity 31. In order to facilitate the metal tube 100 to be removed after bending, the two sleeves are both structured in such a way that one end of the two semicircular ring hoops is hinged and the other end is detachably fixed by a pin or bolt.

[0058] The chain connector 9 includes a plurality of base plates 91 and a hinge 92 for hingedly connecting the fixed sleeve 81 , the movable sleeve 82 and the base plate 91 . A flexible cushion layer is disposed on a side of the base plate 91 facing the metal pipe 100 .

[0059] When the metal tube 100 is positioned, its end is pressed into the bending cavity 31 through the perforation 30, and is successively inserted into the fixed sleeve 81 and the movable sleeve 82 and abuts against the positioning vertical 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, and the flexible cushion layer abuts against the surface of the metal tube 100; during operation, the cylinder 61 drives the winding assembly 6 to rotate and reel in the pull rope 7. The end of the pull rope 7 pulls the movable sleeve 82 to separate it from the end face of the bending cavity 31 and drives the metal tube 100 to bend. Based on the multi-point pulling of multiple movable sleeves 82, the concave support of the bending of the metal tube 100 coordinated with the chain connector 9 and the flexible cushion layer ensures its bending stability and uniformity, thereby improving the bending forming quality.

[0060] In another embodiment, the first upsetting piece 232, the second upsetting piece 271, and the contact points between the positioning plate 5 and the metal tube are all provided with an inductance module, and the inductance module is associated with the driving device of the bending upsetting mechanism. This design ensures that when the upper and lower metal tubes 100 are connected, only when they are fully connected with the inductance module contacts on the upsetting piece and the positioning plate 5, the driving device of the bending upsetting mechanism will be driven through the signal association processing, thereby ensuring the stable positioning of the upper and lower double-channel metal tubes and the quality of bending and upsetting processing.

[0061] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dual-channel synchronous bending and upsetting mechanism with position error prevention, It is characterized in that include: The bending fixed die mechanism has two vertical channels, and the middle part of the metal tube is passed through the two channels; A heading mechanism, a positioning hole is arranged on the top, a first heading die and a first heading mechanism are arranged outside the positioning hole, a heading cavity is arranged at a lateral opening at the bottom of the heading mechanism, a second heading die and a second heading mechanism are arranged in the heading cavity, and the second heading die includes a heading fixed die located on one side of the heading cavity and a heading movable die arranged on the other side of the heading cavity and driven toward the heading fixed die; The bending movable die mechanism has two bending cavities at its side opening, the metal tube extends from the perforation into the corresponding bending cavity, a bending assembly is arranged in the bending cavity, the bending assembly of the upper bending cavity and a first upsetting member driven and arranged on a first upsetting mechanism at the same height respectively perform a primary bending and upsetting process on the end of the metal tube synchronously, and the bending assembly of the lower bending cavity and a second upsetting member driven and arranged on a second upsetting mechanism at the same height respectively perform a secondary bending and upsetting process on the opposite end of the metal tube synchronously; The ground rail has the bending fixed die mechanism, the upsetting head mechanism and the bending movable die mechanism driven and slidably arranged thereon, and a positioning vertical plate is arranged on the outer side of the bending movable die mechanism.

2. A dual-channel synchronous bending and upsetting mechanism with position error prevention according to claim 1, It is characterized in that The channel is open laterally, and a plurality of first guide rollers are horizontally arranged in the channel along the extending direction of the metal tube, and the metal tube is pressed laterally into the channel.

3. A dual-channel synchronous bending and upsetting mechanism with position error prevention according to claim 1, It is characterized in that The first upsetting die comprises a conical transition pipe connected to the outer side of the positioning hole and a shaped straight pipe extending from the outer end surface of the transition pipe section toward the first upsetting piece, and the first upsetting mechanism is positioned on the upsetting mechanism through a base.

4. A dual-channel synchronous bending and upsetting mechanism with position error prevention according to claim 1, It is characterized in that The fixed die of the upsetting head is provided with a first arc-shaped groove for sleeve positioning of one end of the bent metal tube, and the first arc-shaped groove is provided with a first forming groove toward one end of the second upsetting head piece, and the movable die 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, and the first forming groove and the second forming groove both include a conical forming section and a straight tube forming section which are sequentially arranged toward the second upsetting head piece.

5. A dual-channel synchronous bending and upsetting mechanism with position error prevention according to claim 1, It is characterized in that A plurality of guide pillars are arranged on the fixed die of the upsetting head, and the guide pillars are correspondingly inserted into the first through holes of the movable die of the upsetting head, and a plurality of the guide pillars are arranged at intervals on one side of the protrusion of the first arc-shaped groove.

6. A dual-channel synchronous bending and upsetting mechanism with position error prevention according to claim 1, It is characterized in that The bending assembly includes a winding assembly arranged on the side of the bending movable mold mechanism by a cylinder rotation drive, 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 sleeved on the metal tube, and the chain connector abuts against the bending concave surface of the metal tube.

7. A dual-channel synchronous bending and upsetting mechanism with position error prevention according to claim 6, It is characterized in that The pull ropes of the two bending assemblies are both wound in the same direction on the stepped material roll of the winding assembly, and the end of the pull rope is led out of the bending cavity through the second through hole. The winding surface size of the local stepped material roll connected to the pull ropes on several sleeve assemblies extending toward the positioning vertical plate gradually increases. A second guide roller and a third guide roller for guiding the pull rope are arranged in the bending cavity, and the second guide roller is positioned on the bending cavity through 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 ropes.

8. A dual-channel synchronous bending and upsetting mechanism with position error prevention according to claim 6, It is characterized in that The sleeve assembly comprises a fixed sleeve and a movable sleeve positioned inside the through hole, and a magnet for positioning is arranged on the end surface of the movable sleeve corresponding to the bending cavity.

9. A dual-channel synchronous bending and upsetting mechanism with position error prevention according to claim 8, It is characterized in that The chain-type connecting piece comprises a plurality of base plates and hinges for hingedly connecting the fixed sleeve, the movable sleeve and the base plate. A flexible cushion layer is arranged on one side of the base plate facing the metal pipe.

10. A dual-channel synchronous bending and upsetting mechanism with position error prevention according to claim 1, It is characterized in that The first upsetting piece, the second upsetting piece and the abutting parts of the positioning vertical plate and the metal tube are all provided with inductance modules, and the inductance modules are associated with the driving device of the bending upsetting mechanism.

Images