Bending equipment for pipeline production

Abstract

The invention relates to the technical field of pipeline bending, and particularly discloses a bending device for pipeline production, which comprises a base, a support is fixedly connected to the rear end of the top of the base, a hydraulic cylinder is fixedly connected to the top of the support, the bottom of an output shaft of the hydraulic cylinder penetrates through the support and is provided with a pressing die assembly, and bending die assemblies are arranged on the left side and the right side of the top of the base. The bending die assembly comprises fixing frames fixedly connected to the left side and the right side of the top of the base, rotating shafts are rotationally connected to the middles of the two fixing frames, die blocks are fixedly connected to the outer walls of the rotating shafts, and die grooves are formed in the sides, close to each other, of the two die blocks. And after bending is completed, due to rotation of the modules, parts of the two mold grooves are gradually away from each other, demolding of the pipeline is facilitated, the situation that the bent pipeline is difficult to demold is avoided, and the situation that the pipeline bending machining efficiency is affected is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline bending, and in particular to a bending device for pipeline production. Background Art

[0002] In industrial production, square pipes are a type of pipe. It is often necessary to change the direction and angle of metal pipes to adapt to different working occasions and needs. By bending, the pipes can be better integrated into complex spatial arrangements and meet specific installation and use requirements. Therefore, pipe bending equipment is needed to bend the pipes into the required shape.

[0003] In the prior art, it is sometimes necessary to bend the pipe into a shape similar to a U-shape but with a flat bottom. For this shape, a mold with a rectangular cross-section is usually used for bending. When the pipe is pressed into the lower mold, the pipe will be scratched by the corners of the lower mold, thereby causing damage to the pipe surface, which is likely to affect the quality of pipe processing. In addition, the pipe is prone to rebound after bending. Under the action of the resilience of the pipe, the bent pipe squeezes the lower mold, which is likely to cause demolding difficulties, thereby affecting the efficiency of pipe bending. Summary of the invention

[0004] The purpose of the present invention is to provide a bending device for pipe production, which can reduce the scratching of the module on the pipe, thereby avoiding damage to the pipe surface and affecting the quality of pipe processing. After the bending is completed, due to the rotation of the module, the two mold grooves gradually move away from each other, which is convenient for demolding the pipe, thereby avoiding the difficulty of demolding the bent pipe, thereby avoiding affecting the efficiency of the pipe bending process, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bending equipment for pipe production, comprising a base, a bracket is fixedly connected to the top rear end of the base, a hydraulic cylinder is fixedly connected to the top of the bracket, a die assembly is arranged at the bottom of the output shaft of the hydraulic cylinder through the bracket, and bending die assemblies are arranged on the left and right sides of the top of the base, the bending die assembly comprises a fixed frame fixedly connected to the left and right sides of the top of the base, the middle parts of the two fixed frames are rotatably connected to a rotating shaft, a module is fixedly connected to the outer wall of the rotating shaft, a mold groove is opened on the side where the two modules are close to each other, a support plate is fixedly connected to the side where the tops of the two fixed frames are away from each other, a limiting frame is slidably connected to the top of the support plate, the front end of the rotating shaft passes through the front end part of the fixed frame and is fixedly connected to a rotating block, the front end of the fixed frame is fixedly connected to a stopper near the rotating block, and the module is made of lead material at a side away from the mold groove.

[0006] Preferably, a flat plate assembly is provided in the middle part of the base, and the flat plate assembly includes a sliding rod slidably connected to the middle part of the base, a fixing plate is fixedly connected to the top of the sliding rod, and a first spring is fixedly connected between the bottom of the fixing plate and the base.

[0007] Preferably, the module is provided with a groove near the mold groove, and sliding blocks are slidably connected to the front and rear ends of the groove. A rotating rod is rotatably connected between the two sliding blocks, and a second spring is fixedly connected between the sliding block and the module.

[0008] Preferably, the die assembly includes an upper die fixedly connected to the bottom of the hydraulic cylinder output shaft, the bottom of the upper die is slidably connected to a sliding frame, the bottom of the sliding frame is fixedly connected to a lower die, limiting assemblies are arranged at the front and rear ends below the upper die, the limiting assembly includes a limiting plate slidably connected to the bottom of the lower die, the limiting assembly also includes a hole groove opened on the top of the lower die, the bottom of the upper die is fixedly connected to an insertion rod, the side of the limiting plate close to the hole groove is fixedly connected to a moving rod, the side of the moving rod away from the limiting plate is rotatably connected to a circular shaft, and the bottom of the insertion rod is inclined near the side of the limiting plate.

[0009] Preferably, a magnetic block is fixedly connected to a corresponding position of a limit plate inside the lower mold, and the limit plate is made of iron material.

[0010] Preferably, a small groove is provided at the rear end of the bottom of the upper mold, a first medium bag is fixedly connected inside the small groove, an empty groove is provided inside the support plate, a second medium bag is fixedly connected to the top of the inner wall of the empty groove, a connecting plate is fixedly connected to the bottom of the second medium bag, a side of the connecting plate close to the limiting frame is fixedly connected to the limiting frame, a conduit is fixedly inserted between the second medium bag and the first medium bag, and a U-shaped spring piece is fixedly connected between the bottom of the connecting plate and the support plate.

[0011] Preferably, the bottom of the first medium bag is lower than the bottom of the upper mold in an initial state, and the bottom of the first medium bag does not contact the top of the lower mold when the moving rod is located at the top of the inclined position of the insertion rod.

[0012] Preferably, a preheating assembly is provided at the rear end of the upper mold, and the preheating assembly includes frames fixedly connected to the left and right sides of the bracket, and heating plates are slidably connected inside the two frames.

[0013] Preferably, a mounting plate is fixedly connected between the two heating plates, an inclined plate is fixedly connected to the rear end of the mounting plate, the rear end bottom and rear end top of the inclined plate are both inclined, an extrusion frame is fixedly connected to the rear end top of the upper mold, and a round rod is rotatably connected to the bottom of the extrusion frame.

[0014] Preferably, a long plate is fixedly connected between the rear ends of the two heating plates, a third spring is fixedly connected between the long plate and the bracket, and a concave hole is provided at the front end of the heating plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Through the coordination of the bending die assembly and the pressing die assembly, the scratching of the module on the pipe can be reduced, thereby avoiding damage to the pipe surface and affecting the quality of pipe processing. After the bending is completed, due to the rotation of the module, the two die grooves gradually move away from each other, which is convenient for demoulding the pipe, thereby avoiding the difficulty of demoulding the bent pipe, thereby avoiding affecting the efficiency of pipe bending processing;

[0017] 2. Through the design of the rotating rod, the module can further reduce the scratching of the pipe to be bent, further avoid damage to the pipe surface, and further improve the quality of pipe processing;

[0018] 3. Through the action of the limit assembly, the moving rod brings the limit plate to move close to the pipe along the front and rear ends until the limit plate clamps and limits the pipe, so as to avoid the pipe deflection during the bending process and affect the quality of the pipe bending;

[0019] 4. The limiting frame can move downward only after the limiting plate clamps and limits the pipe, so as to avoid the situation that the limiting frame releases the limit on the pipe while the limiting plate has not clamped and limited the pipe, thus effectively avoiding the pipe from deflecting during bending, thereby ensuring the quality of bending;

[0020] 5. Through the function of preheating components, the pipe can be heated to improve the bending effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a view of the overall structure of the present invention before bending;

[0023] Figure 2 It is a schematic diagram of a half-section structure of the present invention when being bent;

[0024] Figure 3 It is a schematic diagram of a half-section structure of a pipeline of the present invention;

[0025] Figure 4It is a partial structural schematic diagram of the bending die assembly of the present invention;

[0026] Figure 5 For the present invention Figure 4 A magnified image of point A;

[0027] Figure 6 It is a schematic diagram of a half-section structure of the upper mold of the present invention;

[0028] Figure 7 It is a schematic diagram of a half-section structure of a support plate of the present invention;

[0029] Figure 8 It is a schematic diagram of the side section structure of the lower mold of the present invention;

[0030] Fig. 9 It is a partial side view structural schematic diagram of the bracket of the present invention;

[0031] Fig.10 For the present invention Fig. 9 Enlarged view of point B.

[0032] Description of reference numerals:

[0033] 1. Base; 2. Bracket; 3. Hydraulic cylinder; 4. Die assembly; 41. Upper die; 42. Sliding frame; 43. Lower die; 5. Bending die assembly; 51. Fixed frame; 52. Rotating shaft; 53. Module; 54. Die groove; 55. Rotating block; 56. Stopper; 57. Groove; 58. Sliding block; 59. Rotating rod; 510. Second spring; 6. Flat plate assembly; 61. Sliding rod; 62. Fixed plate; 63. First spring; 7. Limiting assembly; 71. Limiting plate; 72. hole slot; 73. moving rod; 74. round shaft; 75. magnetic block; 8. preheating assembly; 81. frame; 82. heating plate; 83. mounting plate; 84. recessed hole; 85. inclined plate; 86. extrusion frame; 87. round rod; 88. long plate; 89. third spring; 9. U-shaped spring piece; 10. support plate; 11. limiting frame; 12. insertion rod; 13. small slot; 14. first medium bag; 15. empty slot; 16. second medium bag; 17. connecting plate; 18. catheter. DETAILED DESCRIPTION

[0034] 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.

[0035] See also Figures 1 to 6The present invention provides a technical solution: a bending device for pipe production, comprising a base 1, a bracket 2 is fixedly connected to the top rear end of the base 1, a hydraulic cylinder 3 is fixedly connected to the top of the bracket 2, a die assembly 4 is arranged at the bottom of the output shaft of the hydraulic cylinder 3 through the bracket 2, a bending die assembly 5 is arranged on both sides of the top of the base 1, the bending die assembly 5 comprises a fixed frame 51 fixedly connected to the left and right sides of the top of the base 1, the middle parts of the two fixed frames 51 are rotatably connected to a rotating shaft 52, a module 53 is fixedly connected to the outer wall of the rotating shaft 52, a mold groove 54 is opened on the side where the two modules 53 are close to each other, a support plate 10 is fixedly connected to the side away from each other at the top of the two fixed frames 51, and a limiting frame 1 is slidably connected to the top of the support plate 10 1, the front end of the rotating shaft 52 passes through the front end part of the fixed frame 51 and is fixedly connected with a rotating block 55, the front end of the fixed frame 51 is fixedly connected with a stopper 56 near the rotating block 55, the module 53 is made of lead material at a position away from the die groove 54, and the density of the lead material is relatively large, the middle part of the base 1 is provided with a flat plate assembly 6, the flat plate assembly 6 includes a sliding rod 61 slidably connected to the middle part of the base 1, the top of the sliding rod 61 is fixedly connected with a fixed plate 62, the bottom of the fixed plate 62 is fixedly connected to the base 1 with a first spring 63, the die assembly 4 includes an upper die 41 fixedly connected to the bottom of the output shaft of the hydraulic cylinder 3, the bottom of the upper die 41 is slidably connected with a sliding frame 42, and the bottom of the sliding frame 42 is fixedly connected with a lower die 43.

[0036] By adopting the above technical solution, when the device is used, the square pipe to be bent is placed above the support plates 10 on both sides, and the two ends of the pipe to be bent are close to the limiting frame 11, which plays a role in limiting the position of the pipe and avoids the pipe from deviating during bending and affecting the bending effect.

[0037] After the pipe is placed, the output shaft of the hydraulic cylinder 3 extends, so that the die assembly 4 moves downward to bend the pipe. When the die assembly 4 descends as a whole so that the bottom surface of the lower die 43 contacts the top surface of the pipe, the output shaft of the hydraulic cylinder 3 continues to extend, so that the pipe is deformed. In this process, the rotating shaft 52 rotates with part of the module 53 due to the squeezing of the pipe. When the rotating shaft 52 rotates, the rotating block 55 rotates accordingly. When the rotating block 55 contacts the stopper 56, the rotating shaft 52 is limited by the stopper 56. 52 and the module 53 cannot continue to rotate. At this time, the bottom of the die groove 54 on both sides is horizontal, and as the pipeline is deformed and squeezed downward, the fixed plate 62 is squeezed and moves downward with the sliding rod 61 until the bottom of the sliding rod 61 contacts the bottom of the inner wall of the base 1. The fixed plate 62 can no longer move downward. At this time, the top surface of the fixed plate 62 and the bottom of the die groove 54 are in the same plane. At this time, the fixed plate 62 and the die groove 54 together form a bent die hole shape. As the lower die 43 is pressed in, the pipeline is pressed into a shape similar to a U-shape but with a flat bottom.

[0038] After the bending is completed, the bent pipe is taken out, and the fixing plate 62 is reset under the elastic force of the first spring 63. Since the module 53 is made of lead material at the position away from the die groove 54, the gravity of the module 53 is greater at the position away from the die groove 54, which facilitates the rotation of the module 53 to return the die groove 54 to the initial position, so as to facilitate the next bending.

[0039] Since the module 53 is continuously rotating, the module 53 can reduce the scratching of the pipe, thereby avoiding damage to the pipe surface and affecting the quality of pipe processing. After the bending is completed, due to the rotation of the module 53, parts of the two mold grooves 54 gradually move away from each other, which is convenient for demolding the pipe, thereby avoiding the bent pipe being difficult to demold, thereby avoiding affecting the efficiency of the pipe bending process.

[0040] It should be noted that the two fixing frames 51 are opened on one side thereof, and an oblate tube core rod is arranged inside the tube when the tube is bent, so as to avoid the tube from being deflated during bending, thereby improving the processing quality.

[0041] The design of the sliding frame 42 ensures that the upper mold 41 and the lower mold 43 maintain relative sliding.

[0042] Specifically, Figure 4 and Figure 5 As shown, the module 53 is provided with a groove 57 near the mold groove 54, and sliding blocks 58 are slidably connected at the front and rear ends of the groove 57. A rotating rod 59 is rotatably connected between the two sliding blocks 58, and a second spring 510 is fixedly connected between the sliding block 58 and the module 53.

[0043] By adopting the above technical solution, the design of the rotating rod 59 further reduces the scratching of the module 53 on the pipe that needs to be bent, further avoids damage to the pipe surface, and further improves the quality of pipe processing. In the initial state, the rotating rod 59 slightly extends out of the groove 57. When the bending is completed, the rotating rod 59 is limited by the pipe and hidden in the groove 57. During this process, the sliding block 58 slides and the second spring 510 is compressed. When the pipe is taken out, the rotating rod 59 is reset under the elastic force of the second spring 510.

[0044] Specifically, Figures 2 to 6 and Figure 8 As shown, limiting components 7 are provided at both the front and rear ends below the upper mold 41, and the limiting component 7 includes a limiting plate 71 slidably connected to the bottom of the lower mold 43, and the limiting component 7 also includes a hole groove 72 opened at the top of the lower mold 43, and the bottom of the upper mold 41 is fixedly connected to an insertion rod 12, and the side of the limiting plate 71 close to the hole groove 72 is fixedly connected to a moving rod 73, and the side of the moving rod 73 away from the limiting plate 71 is rotatably connected to a circular shaft 74, and the bottom of the insertion rod 12 is inclined near the side of the limiting plate 71, and the interior of the lower mold 43 is fixedly connected to a magnetic block 75 at a corresponding position of the limiting plate 71, and the limiting plate 71 is made of iron material.

[0045] By adopting the above technical solution, when the output shaft of the hydraulic cylinder 3 extends and the die assembly 4 descends as a whole so that the bottom surface of the lower die 43 contacts the top surface of the pipe, the output shaft of the hydraulic cylinder 3 continues to extend, and under the limiting action of the pipe, the upper die 41 and the lower die 43 are closed. During this process, the insertion rod 12 is inserted into the hole groove 72, so that the inclined part of the bottom of the insertion rod 12 squeezes part of the moving rod 73, so that the moving rod 73 moves with the limiting plate 71 along the front and rear ends to approach the pipe until the limiting plate 71 clamps and limits the pipe, thereby avoiding the pipe from deviating during the bending process and affecting the quality of the pipe bending.

[0046] It should be noted that the design of the round shaft 74 is conducive to reducing the friction between the insertion rod 12 and the moving rod 73. After completing a bending and removing the pipe, the upper mold 41 and the lower mold 43 are separated under the action of the gravity of the lower mold 43. At this time, under the magnetic force of the magnetic block 75, the limit plate 71 is adsorbed by the magnetic block 75, which facilitates the reset of the limit plate 71 and facilitates the next bending.

[0047] Specifically, Figures 1 to 10As shown, a small groove 13 is provided at the rear end of the bottom of the upper mold 41, and a first medium bag 14 is fixedly connected to the interior of the small groove 13. An empty groove 15 is provided inside the support plate 10, and a second medium bag 16 is fixedly connected to the top of the inner wall of the empty groove 15. A connecting plate 17 is fixedly connected to the bottom of the second medium bag 16, and the side of the connecting plate 17 close to the limiting frame 11 is fixedly connected to the limiting frame 11. A conduit 18 is fixedly inserted between the second medium bag 16 and the first medium bag 14, and a U-shaped spring piece 9 is fixedly connected between the bottom of the connecting plate 17 and the support plate 10.

[0048] By adopting the above technical solution, it should be noted that, in the initial state, the bottom of the first medium bag 14 extends out of the small groove 13. When the upper mold 41 and the lower mold 43 are closed, the first medium bag 14 is squeezed, so that the medium inside the first medium bag 14 enters the inside of the conduit 18, and then the medium enters the inside of the second medium bag 16 through the conduit 18, so that the second medium bag 16 expands, so that the connecting plate 17 slides downward in the empty groove 15, so that the limiting frame 11 can move downward, so that the limiting frame 11 is completely retracted into the inside of the support plate 10, so as to avoid the limiting frame 11 affecting the warping of the two ends of the pipeline when the pipeline is bent, thereby avoiding affecting the normal bending of the pipeline.

[0049] It should be noted that after the bending is completed, the upper mold 41 is separated from the lower mold 43, and under the elastic force of the U-shaped spring piece 9, the medium inside the second medium bag 16 returns to the inside of the first medium bag 14 through the conduit 18. At this time, the limiting frame 11 is reset, which facilitates the limiting frame 11 to limit the position when bending the next pipe.

[0050] It should be noted that the conduit 18 is made of a hose material.

[0051] Specifically, Figures 1 to 10 As shown, the bottom of the first medium bag 14 is lower than the bottom of the upper mold 41 in the initial state, and the bottom of the first medium bag 14 does not contact the top of the lower mold 43 when the moving rod 73 is located at the top of the inclined position of the insertion rod 12.

[0052] By adopting the above technical solution, such a design enables the limiting frame 11 to move downward only after the limiting plate 71 clamps and limits the pipeline, so as to avoid the situation where the limiting frame 11 releases the limit on the pipeline and the limiting plate 71 has not yet clamped and limited the pipeline, thereby effectively avoiding the deviation of the pipeline during bending, thereby ensuring the quality of the bending.

[0053] Specifically, Figure 1 , Figure 2 and Fig. 9As shown, a preheating assembly 8 is provided at the rear end of the upper mold 41, and the preheating assembly 8 includes a frame 81 fixedly connected to the left and right sides of the bracket 2, a heating plate 82 is slidably connected inside the two frames 81, a mounting plate 83 is fixedly connected between the two heating plates 82, an inclined plate 85 is fixedly connected to the rear end of the mounting plate 83, and the rear end bottom and rear end top of the inclined plate 85 are inclined, an extrusion frame 86 is fixedly connected to the rear end top of the upper mold 41, and a round rod 87 is rotatably connected to the bottom of the extrusion frame 86, a long plate 88 is fixedly connected between the rear ends of the two heating plates 82, a third spring 89 is fixedly connected between the long plate 88 and the bracket 2, and a concave hole 84 is opened at the front end of the heating plate 82.

[0054] By adopting the above technical solution, a heating component is arranged inside the heating plate 82 near the concave hole 84, which is convenient for heating the pipe. Heating the pipe is beneficial to improving the quality of pipe bending, especially for plastic synthetic pipes. When bending, the output shaft of the hydraulic cylinder 3 extends, so that the upper mold 41 moves upward until the extrusion frame 86 moves downward, so that the round rod 87 at the bottom of the extrusion frame 86 makes the inclined plate 85 move toward the front end, and the mounting plate 83 moves toward the front end with the heating plate 82. When the round rod 87 moves to The rear end of the inclined plate 85 is not inclined. At this time, the concave hole 84 is sleeved on the outside of the bending area of ​​the pipe, so as to heat the pipe and improve the bending effect. Then the output end of the hydraulic cylinder 3 continues to extend, and the round rod 87 is in the inclined area at the bottom of the inclined plate 85. Under the elastic force of the third spring 89, the long plate 88 and the heating plate 82 gradually move toward the rear end. At this time, the heating plate 82 moves toward the rear end, and the heating plate 82 is away from the pipe to avoid affecting the bending of the pipe. The frame 81 limits the heating plate 82 to ensure that the heating plate 82 slides in the front and rear directions.

[0055] Working principle: The square pipe to be bent is placed above the support plates 10 on both sides, and the two ends of the pipe to be bent are close to the limiting frame 11, which plays a role in limiting the position of the pipe to avoid the pipe offset during bending and affecting the bending effect. When the die assembly 4 is lowered as a whole so that the bottom surface of the lower die 43 contacts the top surface of the pipe, the output shaft of the hydraulic cylinder 3 continues to extend, causing the pipe to deform. In this process, the rotating shaft 52 is squeezed by the pipe and rotates with part of the module 53. When the rotating shaft 52 rotates, the rotating block 55 rotates accordingly. When the rotating block 55 contacts the stopper 56, , under the limiting action of the stopper 56, the rotating shaft 52 and the module 53 cannot continue to rotate. At this time, the bottom of the die groove 54 on both sides is horizontal, and as the pipeline is deformed and squeezed downward, the fixed plate 62 is squeezed and moves downward with the sliding rod 61 until the bottom of the sliding rod 61 contacts the bottom of the inner wall of the base 1, and the fixed plate 62 can no longer move downward. At this time, the top surface of the fixed plate 62 and the bottom of the die groove 54 are in the same plane. At this time, the fixed plate 62 and the die groove 54 together form a bent die hole shape. As the lower die 43 is pressed in, the pipeline is pressed into a shape similar to a U-shape but with a flat bottom.

[0056] When the output shaft of the hydraulic cylinder 3 extends out and the die assembly 4 descends as a whole so that the bottom surface of the lower die 43 contacts the top surface of the pipe, the output shaft of the hydraulic cylinder 3 continues to extend, and under the limiting action of the pipe, the upper die 41 and the lower die 43 are closed. During this process, the insertion rod 12 is inserted into the hole groove 72, so that the inclined part of the bottom of the insertion rod 12 squeezes the part of the moving rod 73, so that the moving rod 73 moves close to the pipe along the front and rear ends with the limiting plate 71 until the limiting plate 71 clamps and limits the pipe to avoid the pipe from deviating during the bending process and affecting the quality of the pipe bending. The bottom of the first medium bag 14 extends out of the small groove 13. When the upper die 41 and the lower die 43 are closed, the first medium bag 14 is squeezed, so that the medium inside the first medium bag 14 enters the inside of the conduit 18, and then the medium enters the inside of the second medium bag 16 through the conduit 18, so that the second medium bag 16 expands, thereby causing the connecting plate 17 to move downward, which can make The limiting frame 11 moves downward, so that the limiting frame 11 is completely retracted into the interior of the support plate 10, so as to avoid the limiting frame 11 affecting the warping of the two ends of the pipeline when the pipeline is bent, thereby avoiding affecting the normal bending of the pipeline, so that the limiting frame 11 can move downward only after the limiting plate 71 clamps and limits the pipeline, and avoids that when the limiting frame 11 releases the limit on the pipeline, the limiting plate 71 has not yet clamped and limited the pipeline, thereby effectively avoiding the deviation of the pipeline during bending, thereby ensuring the quality of the bending, the output shaft of the hydraulic cylinder 3 extends, so that the upper mold 41 moves upward until the extrusion frame 86 moves downward, so that the round rod 87 at the bottom of the extrusion frame 86 makes the inclined plate 85 move toward the front end direction, and the mounting plate 83 moves toward the front end direction with the heating plate 82, and when the round rod 87 moves to the rear end of the inclined plate 85 without tilting, the concave hole 84 is located outside the bending area of ​​the pipeline, thereby heating the pipeline, thereby improving the bending effect.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipe production bending device, comprising a base (1), characterized in that: The rear end of the top of the base (1) is fixedly connected to a bracket (2), the top of the bracket (2) is fixedly connected to a hydraulic cylinder (3), the bottom of the output shaft of the hydraulic cylinder (3) passes through the bracket (2) and is provided with a die assembly (4), and the left and right sides of the top of the base (1) are both provided with bending die assemblies (5); The bending die assembly (5) comprises a fixed frame (51) fixedly connected to the left and right sides of the top of the base (1); the middle parts of the two fixed frames (51) are rotatably connected to a rotating shaft (52); the outer wall of the rotating shaft (52) is fixedly connected to a module (53); a mold groove (54) is provided on the side where the two modules (53) are close to each other; the tops of the two fixed frames (51) are fixedly connected to a supporting plate (10) on the side away from each other; the top of the supporting plate (10) is slidably connected to a limiting frame (11); The front end of the rotating shaft (52) passes through the front end portion of the fixed frame (51) and is fixedly connected to a rotating block (55); the front end of the fixed frame (51) is fixedly connected to a stopper (56) near the rotating block (55); and the module (53) is made of lead material at a position away from the mold groove (54).

2. A pipe production bending device according to claim 1, characterized in that: A flat plate assembly (6) is provided in the middle part of the base (1), and the flat plate assembly (6) comprises a sliding rod (61) slidably connected to the middle part of the base (1), a fixing plate (62) is fixedly connected to the top of the sliding rod (61), and a first spring (63) is fixedly connected between the bottom of the fixing plate (62) and the base (1).

3. A pipe production bending device according to claim 1, characterized in that: The module (53) is provided with a groove (57) near the mold groove (54), and sliding blocks (58) are slidably connected at the front and rear ends of the groove (57), and a rotating rod (59) is rotatably connected between the two sliding blocks (58), and a second spring (510) is fixedly connected between the sliding block (58) and the module (53).

4. A pipe production bending device according to claim 1, characterized in that: The die assembly (4) comprises an upper die (41) fixedly connected to the bottom of the output shaft of the hydraulic cylinder (3); the bottom of the upper die (41) is slidably connected to a sliding frame (42); the bottom of the sliding frame (42) is fixedly connected to a lower die (43); a limit assembly (7) is arranged at both the front and rear ends below the upper die (41); the limit assembly (7) comprises a limit plate (71) slidably connected to the bottom of the lower die (43); the limit assembly (7) also comprises a hole groove (72) provided at the top of the lower die (43); the bottom of the upper die (41) is fixedly connected to an insertion rod (12); a side of the limit plate (71) close to the hole groove (72) is fixedly connected to a moving rod (73); a side of the moving rod (73) away from the limit plate (71) is rotatably connected to a round shaft (74); and the bottom of the insertion rod (12) close to the limit plate (71) is inclined.

5. A pipe production bending device according to claim 4, characterized in that: A magnetic block (75) is fixedly connected to a corresponding position of a limiting plate (71) inside the lower mold (43), and the limiting plate (71) is made of iron material.

6. A pipe production bending device according to claim 4, characterized in that: A small groove (13) is provided at the rear end of the bottom of the upper mold (41), a first medium bag (14) is fixedly connected inside the small groove (13), an empty groove (15) is provided inside the support plate (10), a second medium bag (16) is fixedly connected to the top of the inner wall of the empty groove (15), a connecting plate (17) is fixedly connected to the bottom of the second medium bag (16), a side of the connecting plate (17) close to the limiting frame (11) is fixedly connected to the limiting frame (11), a guide tube (18) is fixedly inserted between the second medium bag (16) and the first medium bag (14), and a U-shaped spring piece (9) is fixedly connected between the bottom of the connecting plate (17) and the support plate (10).

7. A pipe production bending device according to claim 6, characterized in that: The bottom of the first medium bag (14) is lower than the bottom of the upper mold (41) in the initial state, and the bottom of the first medium bag (14) does not contact the top of the lower mold (43) when the moving rod (73) is located at the top of the inclined position of the insertion rod (12).

8. The pipe production bending equipment according to claim 4, characterized in that: A preheating assembly (8) is provided at the rear end of the upper mold (41), and the preheating assembly (8) comprises frames (81) fixedly connected to the left and right sides of the bracket (2), and heating plates (82) are slidably connected inside the two frames (81).

9. A pipe production bending device according to claim 8, characterized in that: A mounting plate (83) is fixedly connected between the two heating plates (82); a rear end of the mounting plate (83) is fixedly connected to an inclined plate (85); a rear end bottom and a rear end top of the inclined plate (85) are both inclined; a rear end top of the upper mold (41) is fixedly connected to an extrusion frame (86); a bottom of the extrusion frame (86) is rotatably connected to a round rod (87).

10. A pipe production bending device according to claim 9, characterized in that: A long plate (88) is fixedly connected between the rear ends of the two heating plates (82), a third spring (89) is fixedly connected between the long plate (88) and the bracket (2), and a concave hole (84) is provided at the front end of the heating plate (82).

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