A pipe bender with a two-way double-R and a top pier

Abstract

The present invention discloses a pipe bender with a two-way double-R and a top pier, which includes a support base and a pipe bending machine tool arranged above the support base and slidably connected to the support base. A machine tool transverse movement device for driving the pipe bending machine tool to slide on the support base is provided on one side of the pipe bending machine tool. The pipe bending machine tool includes a pipe bending device, and the pipe bending device is sequentially provided with a top pier clamping device, a pipe roller device, a wrinkle-proof plate device, and a two-way double-R pipe bending die device along the pipe conveying direction. The top pier clamping device is used to provide an axial top pier force during pipe bending to prevent the outer wall of the elbow from thinning, and includes a rotary clamping mechanism and an axial top pier mechanism. The pipe roller device is used to support the pipe. The present invention solves the problem of thinning of the outer wall of the elbow during the pipe bending process and the problem that wrinkles are likely to occur on the inner side of the elbow during left-right two-way thin-wall small-R pipe bending by setting the pipe bending device.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe benders, and specifically to a pipe bender with double - way double - R and a top pier. Background Art

[0002] The serpentine pipe bender is mainly used in industries such as boilers, metallurgy, and chemical engineering. Equipped with a fixed - length pipe feeding device, it can realize the multi - head continuous bending of convective heating surface pipes such as economizers, superheaters, and reheaters, including various specifications and models such as numerically controlled small - R top - upsetting double - way double - R pipe benders and roll - bending double - way double - R pipe benders. However, in the existing pipe benders, the outer wall of the elbow often thins during pipe bending, and when performing left - right double - way thin - wall small - R pipe bending, wrinkles are likely to occur on the inner side of the elbow. In addition, the existing double - sided double - R tower - type pipe bending die does not have a clamping function. Summary of the Invention

[0003] The purpose of the present invention is to provide a pipe bender with double - way double - R and a top pier, which solves the problem of the thinning of the outer wall of the elbow during the pipe - bending process and the problem that wrinkles are likely to occur on the inner side of the elbow when performing left - right double - way thin - wall small - R pipe bending by setting a pipe - bending device.

[0004] To achieve the above - mentioned purpose, the present invention provides the following technical solution: A pipe bender with double - way double - R and a top pier, including a support base and a pipe - bending machine tool arranged above the support base and slidably connected to the support base. One side of the pipe - bending machine tool is provided with a machine - tool transverse movement device for driving the pipe - bending machine tool to slide on the support base. The pipe - bending machine tool includes a pipe - bending device, and the pipe - bending device is sequentially arranged as a top - pier clamping device, a pipe roller device, a wrinkle - proof plate device, and a double - way double - R pipe - bending die device along the pipe conveying direction;

[0005] The top - pier clamping device is used to provide an axial top - pier force during pipe bending to prevent the thinning of the outer wall of the elbow;

[0006] The pipe roller device is used to support the pipe;

[0007] The wrinkle - proof plate device is used to provide a supporting force during pipe bending to prevent wrinkles on the inner wall of the pipe, and includes an axial propulsion mechanism and a lateral movement mechanism;

[0008] The double - way double - R pipe - bending die device is used to bend pipes with two different bending radii, and includes a first pipe - bending die and a second pipe - bending die;

[0009] The pipe - bending machine tool includes a machine - tool support. On both sides of the machine - tool support adjacent to the machine - tool transverse movement device, a hinge seat and an inclined lifting device for tilting and lifting the pipe - bending device are respectively fixedly installed.

[0010] The tilting lifting device includes a lifting oil cylinder, which is fixedly connected to the machine tool bracket through a fixed connecting piece, and the free end of the lifting oil cylinder is fixedly connected to the pipe bending device.

[0011] Preferably, a baffle bracket is fixedly installed on the hinge seat, the pipe bending device is fixedly installed on the baffle bracket, and a hinge device for driving the double-direction double-R pipe bending die device to bend pipes is provided inside the baffle bracket.

[0012] Preferably, the hinge device includes a hinge disc, a hinge wound around the hinge disc, and a first driving oil cylinder and a second driving oil cylinder fixed at both ends of the hinge.

[0013] Preferably, the double-direction double-R pipe bending die device further includes a rotating support disc fixedly installed below the second pipe bending die, the rotating support disc is fixedly connected to the hinge disc, and the first pipe bending die and the second pipe bending die are fixedly connected to each other to drive the first pipe bending die and the second pipe bending die to rotate through the hinge for pipe bending.

[0014] Preferably, the first pipe bending die includes a first upper die and a first lower die that are snap-connected through the cooperation of a first card slot and a first card block, and the second pipe bending die includes a second upper die and a second lower die that are snap-connected through the cooperation of a second card slot and a second card block;

[0015] Both the first pipe bending die and the second pipe bending die are provided with a through core hole inside, and a core rod driven by a first telescopic oil cylinder is arranged in the core hole, and the core rod is used to separate the first upper die and the first lower die of the first pipe bending die and the second upper die and the second lower die of the second pipe bending die.

[0016] Preferably, the anti-wrinkle plate device further includes an anti-wrinkle mechanism arranged on the axial propulsion mechanism, the transverse movement mechanism is used to drive the axial drive mechanism and the anti-wrinkle mechanism to move transversely, the axial propulsion mechanism is used to drive the anti-wrinkle mechanism to approach or move away from the first pipe bending die, the anti-wrinkle mechanism includes an anti-wrinkle plate and an anti-wrinkle plate lifting mechanism, the anti-wrinkle plate includes a left anti-wrinkle plate and a right anti-wrinkle plate; the anti-wrinkle plate includes an arc-shaped supporting part matching the pipe.

[0017] Preferably, the axial propulsion mechanism includes a first oil cylinder propulsion mechanism and a second oil cylinder propulsion mechanism, the first oil cylinder propulsion mechanism is used to drive the left anti-wrinkle plate to approach or move away from the first pipe bending die, the second oil cylinder propulsion mechanism is used to drive the right anti-wrinkle plate to approach or move away from the first pipe bending die, the lifting mechanism includes a first lifting oil cylinder and a second lifting oil cylinder, the first lifting oil cylinder is used to drive the left anti-wrinkle plate to rise and fall, the second lifting oil cylinder is used to drive the right anti-wrinkle plate to rise and fall, and the axial propulsion mechanism is fixedly installed on the first moving plate.

[0018] Preferably, the lateral movement mechanism includes a first transverse support plate fixed on the baffle bracket. A first transverse oil cylinder is provided on one side of the first transverse support plate. The first transverse support plate is slidably connected to the first moving plate through a first chute. The free end of the first transverse oil cylinder is fixedly connected to the first moving plate.

[0019] Preferably, the top pier clamping device includes a rotary clamping mechanism and an axial top pier mechanism. The axial top pier mechanism includes an axial moving frame and a first moving oil cylinder. The first moving oil cylinder is used to drive the rotary clamping mechanism to slide axially on the axial moving frame. The rotary clamping mechanism includes a first driving oil cylinder. The free end of the first driving oil cylinder is hinged to a pushing chuck through a first hinge. The pushing chuck is hinged to a fixed baffle arranged outside the rotary clamping mechanism through a pin shaft. A first semi-circular clamping groove is provided on the pushing chuck. An installation block is provided on the fixed baffle. A second semi-circular clamping groove matching the first semi-circular clamping groove is provided on the installation block.

[0020] Preferably, the pipe supporting roller device includes a first supporting roller arrangement and a first supporting roller bracket arranged below the first supporting roller. The machine tool transverse movement device includes a second transverse oil cylinder. The free end of the second transverse oil cylinder is fixedly connected to the machine tool bracket.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The pipe bender of the present invention is provided with a top pier clamping device, which includes a rotary clamping mechanism and an axial top pier mechanism, thus solving the problem of wall thickness reduction on the outer wall of the elbow during the pipe bending process.

[0023] 2. The pipe bender of the present invention is provided with a double-sided double-R tower-shaped pipe bending die, which is used for bending pipes with two different bending radii, including a first pipe bending die and a second pipe bending die. Moreover, by setting a first left bending clamping hole, a first right bending clamping hole, a second left bending clamping hole, and a second right bending clamping hole, the clamping function can be realized, and the pipe to be bent can be clamped to achieve double-sided double-R pipe bending.

[0024] 3. The pipe bender of the present invention is provided with a wrinkle-proof plate device, which is used to provide a supporting force to prevent the inner wall of the pipe from wrinkling when the pipe is bent, including an axial propulsion mechanism and a lateral movement mechanism. Thus, the problem that the inner side of the elbow is prone to wrinkling and the quality of the elbow cannot be guaranteed during left-right bidirectional thin-wall small-R pipe bending is solved.

[0025] 4. The pipe bender of the present invention is provided with an inclined lifting device. The free end of the lifting oil cylinder is fixedly connected to the pipe bending device and is used to lift the pipe bending device in an inclined manner. This inclined lifting device has a simple structure and stable lifting, eliminating the need for expensive precision machine tool linear guides and overcoming the problem of unbalanced lifting that may be caused by the overweight of the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a pipe bender with a two-way double-R and a top pier according to the present invention;

[0027] Figure 2 is a front view of a pipe bender with a two-way double-R and a top pier according to the present invention;

[0028] Figure 3 is a schematic structural diagram of the pipe bending device in a pipe bender with a two-way double-R and a top pier according to the present invention;

[0029] Figure 4 In a pipe bender with a two-way double-R and a top pier according to the present invention Figure 3 is an enlarged schematic structural diagram of part A;

[0030] Figure 5 is a schematic structural diagram of the rotary clamping mechanism in a pipe bender with a two-way double-R and a top pier according to the present invention;

[0031] Figure 6 is a schematic structural diagram of the clamping mechanism mounting bracket in a pipe bender with a two-way double-R and a top pier according to the present invention;

[0032] Figure 7 In a pipe bender with a two-way double-R and a top pier according to the present invention Figure 3 is an enlarged schematic structural diagram of part B;

[0033] Figure 8 is a schematic structural diagram of the anti-wrinkle plate device in a pipe bender with a two-way double-R and a top pier according to the present invention;

[0034] Figure 9 is a schematic structural diagram of the two-way double-R pipe bending die device in a pipe bender with a two-way double-R and a top pier according to the present invention;

[0035] Figure 10 is a schematic structural diagram of the connection between the two-way double-R pipe bending die device and the anti-wrinkle plate device in a pipe bender with a two-way double-R and a top pier according to the present invention;

[0036] Figure 11 is a schematic structural diagram of the connection between the first pipe bending die and the first pipe bending die in a pipe bender with a two-way double-R and a top pier according to the present invention;

[0037] Figure 12 is a sectional structural diagram of the first pipe bending die and the first pipe bending die in a pipe bender with a two-way double-R and a top pier according to the present invention;

[0038] Figure 13 Schematic structural diagram of the hinge device in a pipe bender with a two-way double-R and a top pier

[0039] In the figure: 1. Support base; 2. Pipe bending machine tool; 21. Machine tool bracket; 22. Hinge seat; 23. Inclined lifting device; 2301. Lifting oil cylinder; 2302. Fixed connecting piece; 2303. Transverse baffle; 24. Baffle bracket; 25. Hinge device; 2501. Hinge disc; 2502. Hinge; 2503. First driving oil cylinder; 2504. Second driving oil cylinder; 2505. Rotating support disc; 2301. Lifting oil cylinder; 2302. Fixed connecting piece; 3. Machine tool transverse movement device; 301. Second transverse movement oil cylinder; 4. Top pier clamping device; 41. Rotary clamping mechanism; 4101. First driving oil cylinder; 4102. First hinge piece; 4103. Pushing chuck; 4104. Fixed baffle; 4105. Mounting block; 4106. First semi-circular clamping groove; 4107. Second semi-circular clamping groove; 42. Axial top pier mechanism; 4201. Axial moving frame; 4202. First moving oil cylinder; 4203. Clamping mechanism mounting frame; 5. Pipe roller device; 501. First roller; 502. First roller bracket; 6. Anti-wrinkle plate device; 601. Left anti-wrinkle plate; 602. Right anti-wrinkle plate; 603. Arc support part; 61. Axial propulsion mechanism; 6101. First oil cylinder propulsion mechanism; 6102. Second oil cylinder propulsion mechanism; 6103. First lifting oil cylinder; 6104. Second lifting oil cylinder; 62. Transverse movement mechanism; 6201. First transverse movement support plate; 6202. First transverse movement oil cylinder; 6203. First moving plate; 7. Two-way double-R pipe bending die device; 71. First pipe bending die; 7101. First upper die; 7102. First lower die; 7103. First left bending clamping hole; 7104. First arc pipe bending area; 7105. First clamping groove; 7106. First clamping block; 7107. First right bending clamping hole; 72. Second pipe bending die; 7201. Second upper die; 7202. Second lower die; 7203. Second left bending clamping hole; 7204. Second right bending clamping hole; 7204. Second arc pipe bending area; 7205. Second clamping groove; 7206. Second clamping block; 7207. Second right bending clamping hole; 73. Core rod; 74. Core hole. Specific implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] Please refer to Figure 1 , an embodiment provided by the present invention: a pipe bender with a bidirectional double-R with a top pier, including a support base 1 and a pipe bending machine tool 2 disposed above the support base 1 and slidably connected to the support base 1. A machine tool transverse movement device 3 for driving the pipe bending machine tool 2 to slide on the support base 1 is provided on one side of the pipe bending machine tool 2. The pipe bending machine tool 2 includes a pipe bending device, and the pipe bending device is sequentially provided with a top pier clamping device 4, a pipe roller device 5, a wrinkle prevention plate device 6, and a bidirectional double-R pipe bending die assembly

[0042] Specifically, in order to reduce the thinning of the outer wall of the elbow during pipe bending and improve the forming of the elbow, an axial top pier force needs to be applied to the pipe during pipe bending. Therefore, the top pier clamping device 4 is provided. The top pier clamping device 4 is used to provide an axial top pier force to prevent the thinning of the outer wall of the elbow during pipe bending, and includes a rotary clamping mechanism 41 and an axial top pier mechanism 42;

[0043] Specifically, the pipe roller device 5 is used to support the pipe and includes a first roller 501;

[0044] Specifically, when performing left-right bidirectional thin-wall small-R pipe bending, wrinkles are likely to occur on the inner side of the elbow, and the quality of the elbow cannot be guaranteed. Therefore, the wrinkle prevention plate device 6 is provided. The wrinkle prevention plate device 6 is used to provide a supporting force to prevent wrinkles on the inner wall of the pipe during pipe bending, and includes an axial propulsion mechanism 61 and a transverse movement mechanism 62;

[0045] Specifically, the bidirectional double-R pipe bending die device 7 is used to bend pipes with two different bending radii and includes a first pipe bending die 71 and a second pipe bending die 72;

[0046] Specifically, for the bidirectional double-R pipe bender to complete bending on both the left and right sides, the machine tool needs to be lifted and moved horizontally. Lift it up and enter the working position. After lowering, make the entire machine tool lower than the lower surface of the pipe to complete the horizontal movement operation. Generally, the machine tool is heavy and has a front-back weight bias, and smooth lifting of the machine tool needs to be achieved. The pipe bending machine tool 2 of the present application includes a machine tool support 21, and hinge seats 22 and tilt lifting devices 23 for tilting and lifting the pipe bending device are respectively fixedly installed on both sides of the machine tool support 21 adjacent to the machine tool transverse movement device 3.

[0047] Specifically, the tilt lifting device 23 includes a lifting oil cylinder 2301. The lifting oil cylinder 2301 is fixedly connected to the machine tool support 21 through a fixed connecting member 2302, and the free end of the lifting oil cylinder 2301 is fixedly connected to the pipe bending device.

[0048] Among them, the fixed support is welded to the machine tool support 21, and the free end of the lifting oil cylinder 2301 is welded to the baffle support 24.

[0049] An embodiment provided by the present invention, a baffle bracket 24 is fixedly installed on the hinge seat 22, the bent pipe device is fixedly installed on the baffle bracket 24, and a hinge device 25 for driving the double-sided double-R bent pipe die device 7 to bend pipes is provided inside the baffle bracket 24.

[0050] As Figure 13 shown, it is a schematic structural diagram of the hinge device 25 in the pipe bender of the present invention. An embodiment provided by the present invention, the hinge device 25 includes a hinge disk 2501, a hinge 2502 wound around the hinge disk 2501, and a second driving oil cylinder 4101 and a second driving oil cylinder 2504 fixed at both ends of the hinge 2502. The second driving oil cylinder 4101 and the second driving oil cylinder 2504 alternately expand and contract to drive the hinge 2502 to drive the hinge disk 2501 to rotate forward and backward.

[0051] As Figure 9 shown, it is a schematic structural diagram of the double-sided double-R bent pipe die device 7 in the pipe bender of the present invention. An embodiment provided by the present invention, the double-sided double-R bent pipe die device 7 further includes a rotating support disk 2505 fixedly installed below the second bent pipe die 72, and the rotating support disk 2505 is fixedly connected to the hinge disk 2501, whereby the hinge disk 2501 can drive the rotating support disk 2505 to rotate forward and backward. And, the first bent pipe die 71 and the second bent pipe die 72 are fixedly connected between them. Thus, the second driving oil cylinder 4101 and the second driving oil cylinder 2504 alternately expand and contract to drive the hinge 2502 to drive the hinge disk 2501 to rotate forward and backward, and further drive the rotating support disk 2505 to rotate forward and backward, and further drive the first bent pipe die 71 and the second bent pipe die 72 to rotate forward and backward to perform left and right pipe bending.

[0052] As Figure 12 shown, it is a schematic cross-sectional structural diagram of the first bent pipe die 71 and the first bent pipe die 71 in the pipe bender of the present invention. An embodiment provided by the present invention, the first bent pipe die 71 includes a first upper die 7101 and a first lower die 7102 that are snap-connected through the cooperation of a first card slot 7105 and a first card block 7106. The second bent pipe die 72 includes a second upper die 7201 and a second lower die 7202 that are snap-connected through the cooperation of a second card slot 7205 and a second card block 7206. Through holes 74 are provided inside both the first bent pipe die 71 and the second bent pipe die 72, and a core rod 73 driven by a first telescopic oil cylinder is provided inside the through holes 74. The core rod 73 is used to separate the first upper die 7101 and the first lower die 7102 of the first bent pipe die 71 and the second upper die 7201 and the second lower die 7202 of the second bent pipe die 72. Specifically, the core rod 73 is provided as a stepped core rod 73.

[0053] The stepped core rod 73, driven by the cylinder, passes through the core hole 74 to drive the separation of the first upper die 7101 and the first lower die 7102 of the first bending die 71 and the second upper die 7201 and the second lower die 7202 of the second bending die 72. When the metal pipe passes through the first arc-shaped bending area 7104 and the second arc-shaped bending area 7204 (die cavity) of the bending die and through the corresponding clamping holes, the core rod 73 descends, and the first upper die 7101 and the first lower die 7102 of the first bending die 71 and the second upper die 7201 and the second lower die 7202 of the second bending die 72 are closed. The first card slot 7105 cooperates with the first card block 7106, and the second card slot 7205 cooperates with the second card block 7206, so that the first bending die 71 and the second bending die 72 are accurately positioned and can withstand lateral pressure during bending.

[0054] When performing left-right bidirectional thin-wall small R bending, wrinkles are likely to occur on the inner side of the elbow. Therefore, a wrinkle prevention plate device 6 is provided. In this embodiment, as Figure 8 shown, it is a schematic structural diagram of the wrinkle prevention plate device 6 in the bending machine of the present invention. An embodiment provided by the present invention, the wrinkle prevention plate device 6 further includes a wrinkle prevention mechanism arranged on the axial propulsion mechanism 61. The lateral movement mechanism 62 is used to drive the axial drive mechanism and the wrinkle prevention mechanism to move laterally. The axial propulsion mechanism 61 is used to drive the wrinkle prevention mechanism to approach or move away from the first bending die 71. The wrinkle prevention mechanism includes a wrinkle prevention plate and a wrinkle prevention plate lifting mechanism. The wrinkle prevention plate includes a leftward wrinkle prevention plate 601 and a rightward wrinkle prevention plate 602; the wrinkle prevention plate includes an arc-shaped support portion 603 matching the pipe.

[0055] Specifically, as Figure 10 shown, the axial propulsion mechanism 61 includes a first oil cylinder propulsion mechanism 6101 and a second oil cylinder propulsion mechanism 6102. The first oil cylinder propulsion mechanism 6101 is used to drive the leftward wrinkle prevention plate 601 to approach or move away from the first bending die 71. The second oil cylinder propulsion mechanism 6102 is used to drive the rightward wrinkle prevention plate 602 to approach or move away from the first bending die 71. The lifting mechanism includes a first lifting oil cylinder and a second lifting oil cylinder. The first lifting oil cylinder is used to drive the leftward wrinkle prevention plate 601 to rise and fall. The second lifting oil cylinder is used to drive the rightward wrinkle prevention plate 602 to rise and fall. The axial propulsion mechanism 61 is fixedly installed on the first moving plate 6203.

[0056] As Figure 7As shown in the figure, an embodiment provided by the present invention, the lateral movement mechanism 62 includes a first lateral movement support plate 6201 fixed on the baffle support 24. One side of the first lateral movement support plate 6201 is provided with a first lateral movement oil cylinder 6202. The first lateral movement support plate 6201 is slidably connected to the first moving plate 6203 through a first chute. The free end of the first lateral movement oil cylinder 6202 is fixedly connected to the first moving plate 6203. In this way, the front and back lateral movement operation of the anti-wrinkle plate device 6 is completed to meet the requirements when performing left and right bidirectional bending of thin-walled small R bend pipes.

[0057] As Figure 4 As shown in the figure, an embodiment provided by the present invention, the axial top pier mechanism 42 includes an axial movement frame 4201 and a first moving oil cylinder 4202. The first moving oil cylinder 4202 is used to drive the rotary clamping mechanism 41 to slide axially on the axial movement frame 4201; the rotary clamping mechanism 41 includes a second driving oil cylinder 4101. The free end of the second driving oil cylinder 4101 is hinged to the pushing chuck 4103 through a first hinge 4102. The pushing chuck 4103 is hinged to a fixed baffle 4104 arranged outside the rotary clamping mechanism 41 through a pin shaft. The pushing chuck 4103 is provided with a first semi-circular clamping groove 4106. The fixed baffle 4104 is provided with a mounting block 4105. The mounting block 4105 is provided with a second semi-circular clamping groove 4107 that matches the first semi-circular clamping groove 4106. By setting the first semi-circular clamping groove 4106 and the second semi-circular clamping groove 4107, the pipe can be clamped together with the arc-shaped clamping groove when the pipe is bent. When bending the pipe, the first moving oil cylinder 4202 pushes the arc-shaped clamping groove forward, and an axial pressure is formed in the pipe section of the axial top pier mechanism 42, so as to improve the forming effect; after the pipe bending is completed, the piston rod of the second driving oil cylinder 4101 retracts, and the pushing chuck 4103 rotates downward around the fixed shaft and returns to its original position. At this time, all components are lower than the lower surface of the pipe. The whole set of equipment can adjust the axial position of the fixture according to the size of the pipe bending radius. The whole set of equipment has a simple structure and a large clamping force.

[0058] As Figure 1 As shown in the figure, it is a structural schematic diagram of a pipe bending machine with double R and top pier in both directions provided by the present invention. An embodiment provided by the present invention, the pipe roller device 5 further includes a first roller support 502 arranged below the first roller 501; it is used to provide a supporting force for the pipe during the pipe bending process.

[0059] The machine tool lateral movement device 3 includes a second lateral movement oil cylinder 301. The free end of the second lateral movement oil cylinder 301 is fixedly connected to the machine tool support 21, so as to realize the lateral movement operation of the machine tool support 21.

[0060] As Figure 11As shown in the figure, it is a schematic structural diagram of the connection between the first pipe bending die 71 and the first pipe bending die 71 in the pipe bender of the present invention. In this embodiment, by setting the first left bending clamping hole 7103, the first right bending clamping hole 7107, the second left bending clamping hole 7203, and the second right bending clamping hole 72077204, the clamping function can be realized, and the pipe to be bent can be clamped to realize the double-sided double-R pipe bending.

[0061] Working principle: When the machine tool is about to work, the piston rod of the lifting oil cylinder 2301 is in the retracted position, and the entire baffle support 24 is in an inclined state with the left side lower and the right side higher. At this time, the highest points of the working positions of all components (including the pipe bending device) on the baffle support 24 are lower than the lower surface of the pipe. Through the machine tool transverse movement device 3, the machine tool can complete the transverse movement smoothly. When the machine tool needs to enter the working state, the piston rod of the lifting oil cylinder 2301 extends, pushing the machine tool bed body to rotate around the hinge seat 22, and the machine tool changes from an inclined state to a horizontal state. At this time, the pipe bending devices are all at the same height as the pipe to be bent, meeting the conditions for pipe bending. In order to prevent the machine tool from shaking during the transverse movement, two transverse baffles 2303 are arranged at one end of the machine tool where the lifting oil cylinder 2301 is provided to offset the left and right shaking of the machine tool during the transverse movement.

[0062] Before pipe bending, first place the pipe in the second semi-circular clamping groove 4107 on the mounting block 4105, and then drive the pushing chuck 4103 to rotate upward around the fixed axis through the second driving oil cylinder 4101 so that the pipe is clamped between the second semi-circular clamping groove 4107 and the first semi-circular clamping groove 4106. Thus, when the pipe is bent, the pipe can be clamped together with the arc-shaped clamping groove. Then, the first moving oil cylinder 4202 drives the rotary clamping mechanism 41 to slide axially on the axial moving frame 4201, forming an axial pressure in this section of the pipe of the axial top pier mechanism 42, thereby playing a role in improving the forming.

[0063] When the double-sided double-R pipe bending die device 7 is in the preparation stage, the stepped core rod 73 drives the first upper die 7101 of the first pipe bending die 71 to be separated from the first lower die 7102 and the second upper die 7201 of the second pipe bending die 72 to be separated from the second lower die 7202 under the drive of the first telescopic oil cylinder. Then, when the metal pipe passes through the first arc-shaped pipe bending area 7104 and the second arc-shaped pipe bending area 7204 (die cavity) of the pipe bending die and passes through the corresponding clamping holes, the core rod 73 descends, and the first upper die 7101 of the first pipe bending die 71 is closed with the first lower die 7102, and the second upper die 7201 of the second pipe bending die 72 is closed with the second lower die 7202. The first clamping groove 7105 cooperates with the first clamping block 7106, and the second clamping groove 7205 cooperates with the second clamping block 7206, so that the first pipe bending die 71 and the second pipe bending die 72 are accurately positioned and can withstand the lateral pressure during pipe bending. The double-sided double-R pipe bending die device 7 can simultaneously complete the double-sided double-R pipe bending to form a serpentine pipe row with two bending radii, large and small.

[0064] When the two-way anti-wrinkle plate device 6 is working, the first oil cylinder propulsion mechanism 6101 or the second oil cylinder propulsion mechanism 6102 is in the extended state. The arc-shaped support part 603 matches the pipe to be bent, and the pipe bending starts. The anti-wrinkle plate is on the inner side of the pipe elbow, giving the pipe a supporting force, thereby effectively preventing wrinkles on the inner wall of the pipe.

[0065] When the pipe bending is completed, the first oil cylinder propulsion mechanism 6101 or the second oil cylinder propulsion mechanism 6102 is in the extended state, and the two anti-wrinkle plates fall below, lower than the lower surface of the pipe. The core rod 73 repeats the actions when separating the first upper die 7101 and the first lower die 7102 of the first pipe bending die 71 and the second upper die 7201 and the second lower die 7202 of the second pipe bending die 72. The metal pipe is removed from the die. The piston rod of the second driving oil cylinder 4101 retracts, pushing the chuck 4103 to rotate downward around the fixed axis and return to the original position. At this time, all components are lower than the lower surface of the pipe.

[0066] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A pipe bender with a double - direction double - R top pier, comprising a support base (1) and a pipe bending machine tool (2) disposed above the support base (1) and slidably connected to the support base (1). It is characterized in that: On one side of the pipe bending machine tool (2), there is a machine tool transverse movement device (3) for driving the pipe bending machine tool (2) to slide on the support base (1). The pipe bending machine tool (2) includes a pipe bending device, and the pipe bending device is sequentially arranged as a top pier clamping device (4), a pipe roller device (5), a wrinkle - proof plate device (6), and a double - direction double - R pipe bending die device (7) along the pipe conveying direction; The top pier clamping device (4) is used to provide an axial top pier force during pipe bending to prevent the outer wall of the elbow from thinning; The pipe roller device (5) is used to support the pipe; The wrinkle - proof plate device (6) is used to provide a supporting force during pipe bending to prevent the inner wall of the pipe from wrinkling, and includes an axial propulsion mechanism (61) and a transverse movement mechanism (62); The double - direction double - R pipe bending die device (7) is used to bend pipes with two different bending radii, and includes a first pipe bending die (71) and a second pipe bending die (72); The pipe bending machine tool (2) includes a machine tool support (21). On two sides of the machine tool support (21) adjacent to the machine tool transverse movement device (3), there are respectively fixedly installed a hinge seat (22) and an inclined lifting device (23) for tilting and lifting the pipe bending device; The inclined lifting device (23) includes a lifting oil cylinder (2301). The lifting oil cylinder (2301) is fixedly connected to the machine tool support (21) through a fixed connecting piece (2302), and the free end of the lifting oil cylinder (2301) is fixedly connected to the pipe bending device; On the hinge seat (22), there is fixedly installed a baffle support (24). The pipe bending device is fixedly installed on the baffle support (24), and a hinge device (25) for driving the double - direction double - R pipe bending die device (7) to bend the pipe is arranged in the baffle support (24); The hinge device (25) includes a hinge disc (2501), a hinge (2502) wound around the hinge disc (2501), and a first driving oil cylinder (2503) and a second driving oil cylinder (2504) fixed at both ends of the hinge (2502); The wrinkle - proof plate device (6) further includes a wrinkle - proof mechanism arranged on the axial propulsion mechanism (61). The transverse movement mechanism (62) is used to drive the axial driving mechanism and the wrinkle - proof mechanism to move transversely. The axial propulsion mechanism (61) is used to drive the wrinkle - proof mechanism to approach or move away from the first pipe bending die (71). The wrinkle - proof mechanism includes a wrinkle - proof plate and a wrinkle - proof plate lifting mechanism. The wrinkle - proof plate includes a left - hand wrinkle - proof plate (601) and a right - hand wrinkle - proof plate (602); The wrinkle - proof plate includes an arc - shaped support part (603) matching the pipe. The top pier clamping device (4) includes a rotary clamping mechanism (41) and an axial top pier mechanism (42). The axial top pier mechanism (42) includes an axially moving frame (4201) and a first moving oil cylinder (4202). The first moving oil cylinder (4202) is used to drive the rotary clamping mechanism (41) to slide axially on the axially moving frame (4201). The rotary clamping mechanism (41) is installed on a clamping mechanism mounting frame (4203) and includes a third driving oil cylinder (4101). The free end of the third driving oil cylinder (4101) is hinged to a pushing chuck (4103) through a first hinge (4102). The pushing chuck (4103) is hinged to a fixed baffle (4104) arranged outside the rotary clamping mechanism (41) through a pin shaft. A first semi-circular clamping groove (4106) is provided on the pushing chuck (4103), and a mounting block (4105) is provided on the fixed baffle (4104). A second semi-circular clamping groove (4107) matching the first semi-circular clamping groove (4106) is provided on the mounting block (4105).

2. A pipe bender with a two-way double-R belt top pier according to claim 1, characterized in that: The two-way double-R pipe bending die device (7) further includes a rotary support disk (2505) fixedly installed below the second pipe bending die (72). The rotary support disk (2505) is fixedly connected to a hinge disk (2501). The first pipe bending die (71) and the second pipe bending die (72) are fixedly connected to drive the first pipe bending die (71) and the second pipe bending die (72) to rotate through a hinge (2502) for pipe bending.

3. A pipe bender with a two-way double-R belt top pier according to claim 2, characterized in that: The first pipe bending die (71) includes a first upper die (7101) and a first lower die (7102) that are clamped and connected through the cooperation of a first clamping groove (7105) and a first clamping block (7106). The second pipe bending die (72) includes a second upper die (7201) and a second lower die (7202) that are clamped and connected through the cooperation of a second clamping groove (7205) and a second clamping block (7206); Both the first pipe bending die (71) and the second pipe bending die (72) are provided with through core holes (74). A core rod (73) driven by a first telescopic oil cylinder is arranged in the core hole (74). The core rod (73) is used to separate the first upper die (7101) and the first lower die (7102) of the first pipe bending die (71) and the second upper die (7201) and the second lower die (7202) of the second pipe bending die (72).

4. A pipe bender with a two-way double-R belt top pier according to claim 1, characterized in that: The axial propulsion mechanism (61) includes a first oil cylinder propulsion mechanism (6101) and a second oil cylinder propulsion mechanism (6102). The first oil cylinder propulsion mechanism (6101) is used to drive the left anti-wrinkle plate (601) to approach or move away from the first pipe bending die (71). The second oil cylinder propulsion mechanism (6102) is used to drive the right anti-wrinkle plate (602) to approach or move away from the first pipe bending die (71). The anti-wrinkle plate lifting mechanism includes a first lifting oil cylinder and a second lifting oil cylinder. The first lifting oil cylinder is used to drive the left anti-wrinkle plate (601) to rise and fall. The second lifting oil cylinder is used to drive the right anti-wrinkle plate (602) to rise and fall. The axial propulsion mechanism (61) is fixedly installed on the first moving plate (6203).

5. A pipe bender with double-sided double-R and a top pier according to claim 1, characterized in that: The transverse movement mechanism (62) includes a first transverse movement support plate (6201) fixed on the baffle support (24). One side of the first transverse movement support plate (6201) is provided with a first transverse movement oil cylinder (6202). The first transverse movement support plate (6201) is slidably connected to the first moving plate (6203) through a first chute. The free end of the first transverse movement oil cylinder (6202) is fixedly connected to the first moving plate (6203).

6. A pipe bender with double-sided double-R and a top pier according to claim 1, characterized in that: The pipe roller device (5) includes a first roller (501) and a first roller support (502) arranged below the first roller (501); The machine tool transverse movement device (3) includes a second transverse movement oil cylinder (301). The free end of the second transverse movement oil cylinder (301) is fixedly connected to the machine tool support (21).

Images