Pipe bending machine capable of conveniently adjusting pipe diameter

Abstract

The invention relates to a pipe bending machine, in particular to a pipe bending machine facilitating pipe diameter adjustment. According to the pipe bending machine convenient to adjust the pipe diameter, the dies can be rapidly switched to adapt to the pipe diameter of a pipeline, the automation degree is high, and operation is convenient. According to the technical scheme, the pipe bending machine convenient to adjust the pipe diameter comprises a bottom frame, a workbench and a guide wheel assembly, the workbench is fixedly connected to the rear portion of the upper side of the bottom frame, the guide wheel assembly is installed on the upper side of the workbench, and an installation frame is fixedly connected to the front side of the workbench. According to the fixed wheel device, the mode that the multiple fixed wheel molds are assembled through the loading rod of the fixed wheel device and the mode that the first electric sliding rail is electrically controlled are adopted, so that the fixed wheel molds can be rapidly and accurately lifted to the needed positions, and compared with a traditional fixed wheel mold replacement mode, the fixed wheel device does not need manual direct operation.

Description

Technical Field

[0001] The invention relates to a pipe bending machine, in particular to a pipe bending machine which is convenient for adjusting the pipe diameter. Background Art

[0002] In the process of bending pipes such as steel pipes, round pipes or square pipes, bending machines are currently mostly used. By measuring the diameter of the pipe, the mold of the bending machine needs to be replaced to make the bending mold suitable for this type of pipe. However, the bending machine mold is currently replaced manually to adapt to the pipe that needs to be bent, and the current manual replacement method is very inconvenient, that is, it is necessary to manually disassemble the original mold, and then select a suitable mold for installation. The disassembly and installation process is very time-consuming and labor-intensive, and is particularly inconvenient. The mold replacement process is cumbersome, which reduces the efficiency and speed of pipe bending and has a low degree of automation.

[0003] Therefore, it is necessary to develop a pipe bending machine that is convenient for adjusting the pipe diameter to solve the above problems. Summary of the invention

[0004] In order to overcome the shortcomings of the current bending machine that requires manual mold replacement, which is cumbersome, time-consuming, labor-intensive and inefficient, the technical problem is to provide a bending machine that can quickly switch molds to adapt to the pipe diameter, has a high degree of automation, is easy to operate, and is easy to adjust the pipe diameter.

[0005] The technical solution of the present invention is: a pipe bending machine which is convenient for adjusting the pipe diameter, comprises a base frame, a workbench and a guide wheel assembly, the upper rear side of the base frame is fixedly connected with the workbench, the upper side of the workbench is installed with a guide wheel assembly, the front side of the workbench is fixedly connected with a mounting frame, the mounting frame is rotatably connected with a fixed pipe, the fixed pipe is fixedly connected with a bending mechanism main frame, and the upper front side of the workbench is fixedly connected with a connecting frame; a fixed wheel device is provided on the left front side of the connecting frame, and the fixed wheel device is used for lifting and lowering to adjust the applicable bending pipe diameter; an assembling device is provided on the right front side of the connecting frame, and the assembling device is used for lifting and lowering; a bending device is assembled at the assembling device, and the assembling device is used for lifting and lowering to adjust the applicable bending pipe diameter; a propulsion device is provided on the right upper side of the bending mechanism main frame, and the propulsion device is used for propulsion; a positioning device is provided at the propulsion attachment of the propulsion device, and the positioning device is used to cooperate with the bending device for positioning.

[0006] Preferably, the fixed wheel device includes a first electric slide rail, which is fixedly connected to the left front side of the connecting frame, and a mounting seat is fixedly connected to the front side of the moving part of the first electric slide rail. The mounting seat is rotatably connected with a mounting shaft, and the lower side of the mounting shaft extends into the fixed tube, and the upper side of the mounting shaft is fixedly connected with a loading rod, and a stabilizing frame is provided at the loading rod, and a rotating sleeve is rotatably connected to the stabilizing frame, a fastener is provided on the left side of the stabilizing frame, and an interconnecting frame is fixedly connected to the upper side of the mounting seat, and the stabilizing frame is sleeved on the interconnecting frame.

[0007] Preferably, the assembly device includes a second electric slide rail, which is fixedly connected to the right front side of the connecting frame. The front side of the moving part of the first electric slide rail is fixedly connected to a lifting plate. The front side of the lifting plate is fixedly connected to multiple groups of fixed frames, and the fixed frames are all fixedly connected to guide frames. The bending device can be assembled on the guide frame.

[0008] Preferably, the bending device includes an assembly frame, which is respectively arranged at a position between the fixed frames, and the left side of the assembly frame is used to install the bending mold. A guide sleeve is fixedly connected to each of the assembly frames, and the guide sleeves are respectively matched with adjacent guide frames.

[0009] Preferably, the propulsion device includes a guide rail seat, the guide rail seat is fixedly connected to the upper right side of the bending mechanism main frame, a moving pair is fixedly connected to the upper side of the guide rail seat, a propulsion frame is fixedly connected to the upper side of the moving part of the moving pair, the positioning device is installed on the upper side of the propulsion frame, a hydraulic cylinder is fixedly connected to the middle part of the upper side of the guide rail seat, and the moving part of the hydraulic cylinder is connected to the lower side of the propulsion frame.

[0010] Preferably, the positioning device comprises a third electric slide rail, the third electric slide rail is fixedly connected to the propulsion frame, a moving part of the third electric slide rail is fixedly connected to an assembly rod, and the assembly rod can extend into the box structure of the assembly frame.

[0011] Preferably, it also includes a fixing device, which is arranged at the upper position of the assembly frame, and is used to fix the guide frame. The upper left side of the assembly frame is fixedly connected with a first connecting sleeve, and the first displacement frame is mounted on the first connecting sleeve. A first elastic member is connected between the lower side of the first displacement frame and the first connecting sleeve, and a first trigger cone is fixedly connected to the lower end of the first displacement frame, and the first trigger cone extends into the corresponding left position of the box structure inside the assembly frame, and a fixing cone is fixedly connected to the right side of the first displacement frame. A fixing groove is opened at the upper side of the upper guide frame of each assembly frame, and the fixing cones extend into the fixing grooves corresponding to the positions.

[0012] Preferably, it also includes a locking device, which is arranged at a lower position of the assembly frame, and is used to lock the position of the assembly rod and the assembly frame. A second connecting sleeve is fixedly connected to the lower left side of the assembly frame, and a second displacement frame is mounted on the second connecting sleeve. A second elastic member is connected between the upper position of the second displacement frame and the second connecting sleeve, and a locking cone is fixedly connected to the upper end of the second displacement frame, and the locking cones are respectively extended into the middle position inside the box-type structure of the corresponding assembly frame. A locking groove is opened at the middle position of the lower side of the assembly rod, and the locking cones can be extended into the locking groove of the assembly rod. A second trigger cone is fixedly connected to the lower side of the second displacement frame.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention adopts a method of assembling multiple fixed wheel molds by using a loading rod of a fixed wheel device, and electrically controlling the first electric slide rail, so that the fixed wheel mold can be quickly and accurately lifted to the required position. Compared with the traditional fixed wheel mold replacement method, the fixed wheel device can be directly operated without manual labor, that is, there is no need to manually disassemble the original fixed wheel mold, and there is no need to reinstall a new fixed wheel mold, which reduces the time-consuming and labor-intensive manual operation.

[0014] 2. The present invention adopts an assembly device for assembling the bending device and driving it to rise and fall, so that the bending mold can be accurately raised and lowered to the required position. Through the propulsion action of the propulsion device and the positioning device, the positioning device can accurately and quickly position a required bending mold, drive the bending mold to bend the pipe, and can also perform accurate reset. In this way, the replacement process of the bending mold can be automated, and the replacement speed is fast, and still does not require direct manual operation, thereby reducing the tediousness of manual operation and improving efficiency.

[0015] 3. The present invention uses a fixing device and a locking device to fix and lock the positions of the assembly frame, the guide sleeve and the assembly rod, so that the assembly frame and the bending mold connected thereto can remain stable during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the first three-dimensional structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the second three-dimensional structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the fixed wheel device part of the present invention.

[0019] Figure 4 It is a schematic diagram of the partial three-dimensional structure of the fixed wheel device part of the present invention.

[0020] Figure 5It is a three-dimensional structural schematic diagram of the main frame part of the bending mechanism of the present invention.

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the assembly device part of the present invention.

[0022] Figure 7 It is a schematic diagram of the first three-dimensional structure of the bending device part of the present invention.

[0023] Figure 8 It is a schematic diagram of the second three-dimensional structure of the bending device part of the present invention.

[0024] Fig. 9 It is a schematic diagram of a first cutaway three-dimensional structure of the bending device part of the present invention.

[0025] Fig.10 It is a schematic diagram of the three-dimensional structure of the propulsion device part of the present invention.

[0026] Fig.11 It is a schematic diagram of a second cutaway three-dimensional structure of the bending device part of the present invention.

[0027] Fig.12 It is a three-dimensional structural schematic diagram of the assembly rod part of the present invention.

[0028] In the figure numbers: 1: base frame, 2: workbench, 3: guide wheel assembly, 4: mounting frame, 5: fixed pipe, 6: bending mechanism main frame, 61: connecting frame, 7: fixed wheel device, 8: assembly device, 9: bending device, 10: propulsion device, 11: positioning device, 71: first electric slide rail, 72: mounting seat, 73: mounting shaft, 74: loading rod, 75: fixed wheel mold, 76: stabilizing frame, 761: rotating sleeve, 77: fastener, 78: interconnecting frame, 81: second electric slide rail, 82: lifting plate, 83: fixed frame, 84: guide frame, 91: assembly frame , 92: guide sleeve, 93: bending die, 101: guide rail seat, 102: moving pair, 103: pushing frame, 104: hydraulic cylinder, 111: third electric slide rail, 112: assembly rod, 12: fixing device, 121: first connecting sleeve, 122: first displacement frame, 123: first elastic member, 124: first trigger cone, 125: fixing cone, 1210: fixing groove, 13: locking device, 131: second connecting sleeve, 132: second displacement frame, 133: second elastic member, 134: second trigger cone, 135: locking cone, 1310: locking groove. DETAILED DESCRIPTION

[0029] The present invention will now be described more fully below with reference to the accompanying drawings, in which currently preferred embodiments of the present invention are shown. However, the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and these embodiments fully convey the scope of the present invention to the skilled person.

[0030] Example 1: Figure 1-Figure 2 As shown, a pipe bending machine which is convenient for adjusting the pipe diameter includes a base frame 1, a workbench 2, a guide wheel assembly 3, a mounting frame 4, a fixed pipe 5, a bending mechanism main frame 6, a connecting frame 61, a fixed wheel device 7, an assembling device 8, a bending device 9, a propulsion device 10 and a positioning device 11. The base frame 1 is fixedly connected to the workbench 2 at the upper rear side, and the guide wheel assembly 3 is installed on the upper side of the workbench 2. The guide wheel assembly 3 is an existing multi-wheel group integrated module for moving the pipeline. The front side of the workbench 2 is fixedly connected to the mounting frame 4, and a fixed pipe 5 is installed at the mounting frame 4 through a pressure bearing. The fixed pipe 5 is fixedly connected to the bending mechanism main frame 6, and the bending mechanism main frame 6 is an electric-controlled bending machine frame of an existing bending machine. The bending mechanism main frame 6 can rotate with the fixed pipe 5 as the axis. The connecting frame 61 is fixedly connected to the upper front side of the workbench 2, and a fixed wheel device 7 is provided on the left side of the front side of the connecting frame 61. Device 7 cooperates with the fixed pipe 5, and the fixed wheel device 7 is used to assemble the fixed wheel mold 75 for bending. The fixed wheel device 7 performs lifting and lowering work to adjust the applicable bending pipe diameter. An assembly device 8 is provided on the right front side of the connecting frame 61, and the assembly device 8 is used for lifting work. The assembly device 8 is equipped with a bending device 9, and the bending device 9 is used to assemble multiple bending molds 93 for bending. The assembly device 8 is used to adjust the applicable bending pipe diameter for lifting and lowering work. A propulsion device 10 is provided on the right upper side of the bending mechanism main frame 6, and the propulsion device 10 is used to perform propulsion work. A positioning device 11 is provided at the propulsion attachment of the propulsion device 10, and the positioning device 11 is used to cooperate with the bending device 9 to be in place, and through the propulsion action of the propulsion device 10, it cooperates with the fixed wheel device 7 to wrap the pipeline, and drives the propulsion device 10 to rotate through the bending mechanism frame to bend the pipeline.

[0031] When bending a pipe, in order to quickly replace the fixed wheel mold 75 and the bending mold 93 when bending pipes of different diameters, the pipe bending machine that is easy to adjust the pipe diameter can be used; the fixed wheel mold 75 and the bending mold 93 of different applicable pipe diameters can be pre-assembled on the fixed wheel device 7 and the assembly device 8 respectively, and then the fixed wheel device 7 and the assembly device 8 are controlled by the electric control servo system to lift and lower the pipe according to the pipe diameter to be bent, so that the fixed wheel mold 75 and the bending mold 93 suitable for the pipe diameter are in the same horizontal plane position where the guide wheel assembly 3 extends out of the center of the pipe, and then the pipe is extended to the front side of the fixed wheel device 7 and the bending device through the guide wheel assembly 3. 9, and determine the bending length; at this time, the positioning device 11 can be started, so that the positioning device 11 moves to the left and cooperates with the bending device 9 on its left side to complete the positioning, and then the propulsion device 10 is controlled to operate, so that the propulsion device 10 drives the positioning device 11 to the left, so that the propulsion device 10 drives the bending device 9 in place through the positioning device 11 to break away from the cooperation with the assembly device 8, so that the bending device 9 drives the bending mold 93 connected to it to contact the pipeline, and the bending mold 93 will wrap the pipeline by cooperating with the fixed wheel mold 75, and then the bending mechanism main frame 6 can be started to rotate with the fixed pipe 5 as the center of the circle, so that the bending mechanism main frame 6 drives the pushing device 10 to rotate. The advancing device 10, the positioning device 11 and the bending device 9 in place are rotated, so that the bending die 93 at the bending device 9 bends the pipe, and the pipe can be bent at a controllable angle by controlling the rotation angle of the bending mechanism main frame 6; if the bending is completed, the bending mechanism main frame 6 can be controlled to rotate and reset, and the advancing device 10 can be controlled to reset, and the propulsion device 10 will drive the positioning device 11 to move and reset, and the positioning device 11 will drive the bending device 9 in place to move to the right and reset during the process of moving to the right and resetting, and at this time, the bending device 9 will be re-assembled into the assembly device 8; if it is necessary to continue to use the bending die 93 of this pipe diameter for bending work , the positioning device 11 does not need to be controlled to be reset, so that the positioning device 11 remains in the positioning state with the bending device 9; if it is necessary to bend pipes of different diameters, the positioning device 11 can be controlled to be reset, so that the positioning device 11 is separated from the matching state with the bending device 9, and the lifting and lowering of the fixed wheel device 7 and the assembling device 8 can be controlled as described above; in this way, the lifting and lowering of the fixed wheel device 7 and the assembling device 8 are controlled by electric control, so that the fixed wheel mold 75 and the bending mold 93 suitable for bending different pipes are lifted and lowered and positioned to the center horizontal plane of the pipe, so that the replacement process of the fixed wheel mold 75 and the bending mold 93 can be accelerated without direct manual operation.

[0032] Example 2: Figure 3-Figure 4 As shown, the fixed wheel device 7 includes a first electric slide rail 71, a mounting seat 72, a mounting shaft 73, a loading rod 74, a stabilizing frame 76, a rotating sleeve 761, a fastener 77 and an interconnecting frame 78. The first electric slide rail 71 is fixedly connected to the left front side of the connecting frame 61. The first electric slide rail 71 is vertically arranged. The first electric slide rail 71 is controlled by a servo system. The first electric slide rail 71 is a screw self-locking type. The front side of the moving part of the first electric slide rail 71 is fixedly connected with a mounting seat 72. The mounting seat 72 is installed with a mounting shaft 73 by means of a pressure bearing. The lower side of the mounting shaft 73 extends into the fixed tube 5. The mounting shaft 73 is slidably fitted in the fixed tube 5 as a stable support. The upper side of the mounting shaft 73 is fixedly connected to the loading rod 74, the loading rod 74 is a square cross-section structure in the horizontal direction, the loading rod 74 is a structure with a protrusion on the lower side as a supporting function, the loading rod 74 is used to load the square hole fixed wheel mold 75, the loading rod 74 is provided with a stabilizing frame 76, the stabilizing frame 76 is connected to a rotating sleeve 761 through a pressure bearing, the rotating sleeve 761 is a structure with a protrusion on the lower side, the left side of the stabilizing frame 76 is a structure with a fitting hole, the left side of the stabilizing frame 76 is provided with a fastener 77, the fastener 77 is a fastening bolt, the upper side of the mounting seat 72 is fixedly connected with an interconnecting frame 78, the fitting hole structure of the stabilizing frame 76 is fitted on the interconnecting frame 78, the stabilizing frame 76 is fitted on the interconnecting frame 78 and the position is fixed by the action of the fastener 77.

[0033] The stabilizing frame 76 can be disassembled from the loading rod 74, and then a plurality of fixed wheel dies 75 of different pipe diameters and consistent thicknesses can be respectively mounted on the loading rod 74 in the order from large pipe diameter to small pipe diameter. In this way, the lifting and lowering operation can be accurately performed through the servo control of the first electric slide rail 71, so that the fixed wheel die 75 can accurately move to the extended center position of the pipe to be bent; after the fixed wheel die 75 is assembled on the loading rod 74, the stabilizing frame 76 can be re-assembled and fixed on the interconnecting frame 78 through the fastener 77, so that the stabilizing frame 76, the rotating sleeve 761 and the loading rod 74 clamp and fix the assembled fixed wheel die 75; when it is necessary to bend the pipe, the operation of the first electric slide rail 71 can be started and controlled , so that the first electric slide rail 71 drives the loading rod 74 to move through its moving part, so that the loading rod 74 drives the fixed wheel mold 75 installed thereon to run, and through the servo control of the first electric slide rail 71, the fixed wheel mold 75 of the required pipe diameter can be accurately moved to the extended center position of the pipe to be bent, and the installation shaft 73 is in the fixed pipe 5 during the lifting operation, so that when the fixed wheel mold 75 is in a bending stress state, the installation shaft 73 is in the fixed pipe 5 to provide stable support; as mentioned above, the first electric slide rail 71 drives the loading rod 74 to rise and fall, so that the fixed wheel mold 75 can be quickly replaced, and the traditional bending machine fixed wheel mold 75 does not need to be disassembled and then installed, which saves replacement time.

[0034] like Figure 5-Figure 7 As shown, the assembly device 8 includes a second electric slide rail 81, a lifting plate 82, a fixed frame 83 and a guide frame 84. The second electric slide rail 81 is fixedly connected to the front right side of the connecting frame 61. The second electric slide rail 81 is vertically arranged. The second electric slide rail 81 is controlled by a servo system. The second electric slide rail 81 is a screw self-locking type. The front side of the moving part of the second electric slide rail 81 is fixedly connected with a lifting plate 82. The front side of the lifting plate 82 is fixedly connected with multiple groups of fixed frames 83. The fixed frames 83 are all structures with upper and lower layers, and the upper and lower structures of the fixed frames 83 are all separated. The upper and lower structures of the fixed frames 83 are fixedly connected with guide frames 84 at opposite positions. The bending device 9 can be assembled at the guide frame 84.

[0035] A plurality of bending dies 93 of different pipe diameters and uniform thicknesses can be installed in the bending device 9 in the order from large pipe diameter to small pipe diameter. In this way, the bending die 93 can be accurately lifted and lowered by the servo control of the second electric slide rail 81, so that the bending die 93 can be accurately moved to the extended center position of the pipe to be bent; the bending device 9 can be installed on the guide frame 84 of each group of the fixed frame 83 as needed, and the bending device 9 can be installed on the guide frame 84 from low to high in the order from large pipe diameter to small pipe diameter; when the pipe needs to be bent, the operation of the second electric slide rail 81 can be started and controlled so that The second electric slide 81 drives the lifting plate 82 and the fixed frame 83 to move through its moving parts, so that the fixed frame 83 and the guide frame 84 drive the bending die 93 assembled thereon to operate. Through the servo control of the second electric slide 81, the bending die 93 of the required pipe diameter can be accurately operated to the extended center position of the pipe to be bent; the manner in which the second electric slide 81 drives the fixed frame 83 and the bending device 9 to lift and lower as mentioned above can enable the bending die 93 to be replaced quickly, without the need for the traditional bending machine bending die 93 to be disassembled and then installed, thereby saving replacement time.

[0036] like Figure 7-Figure 9 As shown, the bending device 9 includes an assembly frame 91 and a guide sleeve 92. The assembly frame 91 is respectively arranged at a position between the fixed frames 83. The left side of the assembly frame 91 is used to install the bending mold 93. The upper and lower sides of each assembly frame 91 are fixedly connected with a guide sleeve 92. The assembly frame 91 is a box-type structure with an opening on the right side. The guide sleeves 92 are respectively matched with the adjacent guide frames 84. Each assembly frame 91 is assembled on two adjacent guide frames 84 through the guide sleeves 92 connected thereto.

[0037] The bending die 93 can be installed on the left side of the assembly frame 91, and then the assembly frame 91 is assembled on the guide frame 84 through the guide sleeve 92, so that the assembly of the bending die 93 can be completed; then the positioning device 11 is controlled to operate, and the positioning device 11 runs to the left to cooperate with the assembly frame 91 on its left side, and then the propulsion device 10 is controlled to operate, so that the propulsion device 10 drives the positioning device 11 and the positioning assembly frame 91 to advance to the left, so that the assembly frame 91 drives the bending die 93 connected to it to contact the pipe, and the bending die 93 will wrap the pipe by cooperating with the fixed wheel die 75. At this time, the guide sleeve 92 of the assembly frame 91 is separated from the cooperation with the guide frame 84, and then the bending mechanism main frame 6 can be started to rotate with the fixed pipe 5 as the center, so that the bending mechanism main frame 6 drives the propulsion device 10, the positioning device 11 and the assembly frame 91 and the bending die 93 connected to it to rotate, The bending die 93 is used to bend the pipe, and the pipe can be bent at a controllable angle by controlling the rotation angle of the bending mechanism main frame 6; if the bending is completed, the bending mechanism main frame 6 can be controlled to rotate and reset, and the propulsion device 10 can be controlled to reset, and the propulsion device 10 will drive the positioning device 11 to move and reset, and the positioning device 11 will drive the assembly frame 91 and the bending die 93 to move to the right and reset during the process of moving to the right and resetting, at this time, the assembly frame 91 will be re-fitted and assembled into the guide frame 84 through the guide sleeve 92; if it is necessary to continue to use the bending die 93 of this pipe diameter for bending work, the positioning device 11 can be reset without controlling the reset, so that the positioning device 11 remains in the positioning state with the assembly frame 91, and if it is necessary to replace the bending die 93 of a different pipe diameter, the positioning device 11 can be controlled to reset, so that the positioning device 11 is out of the matching state with the assembly frame 91.

[0038] like Fig.10 As shown, the propulsion device 10 includes a guide rail seat 101, a moving pair 102, a propulsion frame 103 and a hydraulic cylinder 104. The guide rail seat 101 is fixedly connected to the upper right side of the bending mechanism main frame 6, the moving pair 102 is fixedly connected to the upper side of the guide rail seat 101, and the moving pair 102 is a horizontal ship-shaped guide rail structure. The moving part of the moving pair 102 is fixedly connected to the propulsion frame 103 on the upper side. The positioning device 11 is installed on the upper side of the propulsion frame 103, and the hydraulic cylinder 104 is fixedly connected to the middle part of the upper side of the guide rail seat 101. The hydraulic cylinder 104 is horizontally placed, and the moving part of the hydraulic cylinder 104 faces to the left, and the moving part of the hydraulic cylinder 104 is connected to the lower side of the propulsion frame 103.

[0039] When the propulsion device 10 is started as mentioned above, the hydraulic cylinder 104 can be started, and the hydraulic cylinder 104 will drive its moving part to propel to the left. The moving part of the hydraulic cylinder 104 will drive the propulsion frame 103 to move to the left through the moving pair 102, so that the propulsion frame 103 drives the positioning device 11 and the assembly frame 91 to move to the left and contact the pipe that needs to be bent.

[0040] like Figure 10-12 As shown, the positioning device 11 includes a third electric slide rail 111 and an assembly rod 112. The third electric slide rail 111 is fixedly connected to the propulsion frame 103. There are two groups of third electric slide rails 111. The third electric slide rails 111 are all horizontally placed. The third electric slide rails 111 are controlled by a servo system. The third electric slide rail 111 is a screw self-locking type. The moving part of the third electric slide rail 111 is fixedly connected with an assembly rod 112, and the assembly rod 112 can be extended into the box structure of the assembly frame 91.

[0041] When the positioning device 11 is started as mentioned above, the third electric slide rail 111 can be started to drive its moving part to move to the left, so that the moving part of the third electric slide rail 111 drives the assembly rod 112 to move to the left, and the assembly rod 112 moves to the left and extends into the box-type structure of the assembly frame 91 on its left side, so that the positioning of the assembly frame 91 is completed; when the propulsion device 10 is started, the hydraulic cylinder 104 will drive the propulsion frame 103 and the third electric slide rail 111 and the connected assembly rod 112 to move to the left, so that the assembly rod 112 drives the assembly frame 91 in place to move to the left, and the assembly frame 91 drives the bending mold 93 to move to the left and contact the pipe, and at this time, the guide sleeve 92 of the assembly frame 91 is out of contact with the guide frame 84, and can be rotated by the bending mechanism main frame 6.

[0042] Example 3: Fig. 9As shown, it also includes a fixing device 12, which includes a first connecting sleeve 121, a first displacement frame 122, a first elastic member 123, a first trigger cone 124 and a fixing cone 125. The fixing device 12 is arranged at the upper side of the assembly frame 91. The fixing device 12 is used to fix the guide frame 84 to ensure that the assembly frame 91 and the bending mold 93 will not be displaced during movement, so that the assembly frame 91 and the bending mold 93 are stable and wait for position. The first connecting sleeve 121 is fixedly connected to the upper left side of the assembly frame 91, and the first displacement frame 122 is installed at the first connecting sleeve 121. The first displacement frame 122 is an L-shaped structure, and the lower side of the first displacement frame 122 is connected to the first connecting sleeve 12 1 are connected with a first elastic member 123, and the first elastic member 123 is a straight spring. The lower end of the first displacement frame 122 is fixedly connected with a first trigger cone 124, and the first trigger cone 124 extends into the left position of the box structure inside the corresponding assembly frame 91, and the first trigger cone 124 can be triggered by the assembly rod 112. The right side of the first displacement frame 122 is fixedly connected with a fixing cone 125, and the upper side position of the upper guide frame 84 of each assembly frame 91 is opened with a fixing groove 1210, and the fixing cone 125 extends into the fixing groove 1210 corresponding to the position, and the fixing cone 125 fixes the position of the assembly frame 91 and the guide frame 84 by cooperating with the fixing groove 1210.

[0043] When the assembly frame 91 is assembled to the guide frame 84 through the guide sleeve 92, the fixed cone 125 will enter the fixed groove 1210 of the guide frame 84, so that the position of the assembly frame 91 and the guide frame 84 is fixed, so that the position of the assembly frame 91 and the bending mold 93 will not be displaced due to movement; when the assembly rod 112 extends into the box structure of the assembly frame 91, the assembly rod 112 will contact the first trigger cone 124, and the first trigger cone 124 will be pushed to move upward. At this time, the first elastic member 123 is in a stressed state, and the upward movement of the first trigger cone 124 will drive the first displacement frame 122 and the fixed cone 125 to move upward , so that the fixed cone 125 is disengaged from the cooperation with the fixed groove 1210 of the guide frame 84, and the assembly frame 91 is not fixed with the guide frame 84 at this time, and the assembly rod 112 can drive the assembly frame 91 to move to the left; when the assembly rod 112 is disengaged from the in-place state of the assembly frame 91, the assembly rod 112 will be withdrawn from the box-type structure of the assembly frame 91, and the first trigger cone 124 is not subjected to force at this time, and the first elastic member 123 will recover from the stressed state, thereby driving the first displacement frame 122, the first trigger cone 124 and the fixed cone 125 to move downward, so that the fixed cone 125 enters the fixed groove 1210 of the guide frame 84 again.

[0044] like Fig. 9 and Fig.12As shown, a locking device 13 is also included, and the locking device 13 includes a second connecting sleeve 131, a second displacement frame 132, a second elastic member 133, a locking cone 135 and a second trigger cone 134. The locking device 13 is arranged at the lower side of the assembly frame 91. The locking device 13 is used to lock the position of the assembly rod 112 and the assembly frame 91 to ensure the stability of the assembly rod 112 when pushing the assembly frame 91 to run. The lower left side of the assembly frame 91 is fixedly connected with a second connecting sleeve 131, and the second connecting sleeve 131 is equipped with a second displacement frame 132. The second displacement frame 132 is an L-shaped structure, and the upper side of the second displacement frame 132 and the second connecting sleeve 131 are connected. They are all connected with a second elastic member 133, and the second elastic member 133 is a straight spring. The upper end of the second displacement frame 132 is fixedly connected with a locking cone 135, and the locking cone 135 extends into the middle position of the box-type structure of the corresponding assembly frame 91 respectively. A locking groove 1310 is opened at the middle position of the lower side of the assembly rod 112, and the locking cone 135 can be extended into the locking groove 1310 of the assembly rod 112. The lower side of the second displacement frame 132 is fixedly connected with a second trigger cone 134, and the second trigger cone 134 is triggered by the guide frame 84 at the lower position. The locking cone 135 fixes the position of the assembly frame 91 and the assembly rod 112 by cooperating with the locking groove 1310.

[0045] When the assembly frame 91 is assembled on the guide frame 84, the guide frame 84 will push the second trigger cone 134 to move downward, so that the second trigger cone 134 drives the second displacement frame 132 and the locking cone 135 to move downward, and the second elastic member 133 is in a stressed state; when the assembly rod 112 extends into the box-type structure of the assembly frame 91, and the assembly rod 112 drives the assembly frame 91 to push leftward, so that the guide sleeve 92 is separated from the guide frame 84, the second trigger cone 134 is separated from the stress, and the second elastic member 133 is brought The second displacement frame 132 is moved upward for reset, thereby driving the locking cone 135 to move upward and enter the locking groove 1310 of the assembly rod 112, so that the positions of the assembly frame 91 and the assembly rod 112 are locked; when the assembly rod 112 drives the assembly frame 91 to move to the right to re-match the guide sleeve 92 with the guide frame 84, the second trigger cone 134 is triggered to move downward, so that the locking cone 135 is disengaged from the locking groove 1310 of the assembly frame 91, so that the assembly rod 112 can be separated from the box-type structure of the assembly frame 91.

[0046] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipe bending machine for adjusting pipe diameter, comprising a base frame (1), a workbench (2) and a guide wheel assembly (3), wherein the upper rear side of the base frame (1) is fixedly connected to the workbench (2), and the upper side of the workbench (2) is installed with the guide wheel assembly (3), wherein: The front side of the workbench (2) is fixedly connected to a mounting frame (4), the mounting frame (4) is rotatably connected to a fixed pipe (5), the fixed pipe (5) is fixedly connected to a bending mechanism main frame (6), and the upper front side of the workbench (2) is fixedly connected to a connecting frame (61); a fixed wheel device (7) is provided on the left front side of the connecting frame (61), and the fixed wheel device (7) is used to adjust the diameter of the bending pipe for lifting work; an assembly device (8) is provided on the right front side of the connecting frame (61), and the assembly device (8) is used to perform lifting work; a bending device (9) is installed at the assembly device (8), and the assembly device (8) is used to adjust the diameter of the bending pipe for lifting work; a propulsion device (10) is provided on the right upper side of the bending mechanism main frame (6), and the propulsion device (10) is used to perform propulsion work; a positioning device (11) is provided at the propulsion attachment of the propulsion device (10), and the positioning device (11) is used to cooperate with the bending device (9) to be positioned.

2. A pipe bender that is convenient for adjusting pipe diameter according to claim 1, characterized in that: The fixed wheel device (7) comprises a first electric slide rail (71), wherein the first electric slide rail (71) is fixedly connected to the left front side of the connecting frame (61), a mounting seat (72) is fixedly connected to the front side of the moving part of the first electric slide rail (71), a mounting shaft (73) is rotatably connected to the mounting seat (72), the lower side of the mounting shaft (73) extends into the fixed tube (5), a loading rod (74) is fixedly connected to the upper side of the mounting shaft (73), a stabilizing frame (76) is provided at the loading rod (74), a rotating sleeve (761) is rotatably connected to the stabilizing frame (76), a fastener (77) is provided on the left side of the stabilizing frame (76), an interconnecting frame (78) is fixedly connected to the upper side of the mounting seat (72), and the stabilizing frame (76) is sleeved on the interconnecting frame (78).

3. A pipe bending machine for adjusting pipe diameter according to claim 2, characterized in that: The assembly device (8) comprises a second electric slide rail (81), the second electric slide rail (81) is fixedly connected to the right side of the front side of the connecting frame (61), the front side of the moving part of the second electric slide rail (81) is fixedly connected to a lifting plate (82), the front side of the lifting plate (82) is fixedly connected to multiple groups of fixed frames (83), the fixed frames (83) are all fixedly connected to guide frames (84), and the bending device (9) can be assembled at the guide frame (84).

4. The pipe bender for adjusting the pipe diameter according to claim 3 is characterized in that: The bending device (9) comprises an assembly frame (91), wherein the assembly frame (91) is respectively arranged at a position between the fixing frames (83), and the left side of the assembly frame (91) is used to install a bending mold (93), and each assembly frame (91) is fixedly connected with a guide sleeve (92), and the guide sleeve (92) is respectively matched with the adjacent guide frame (84).

5. A pipe bender that is convenient for adjusting pipe diameter according to claim 4, characterized in that: The propulsion device (10) comprises a guide rail seat (101), the guide rail seat (101) is fixedly connected to the upper right side of the bending mechanism main frame (6), the upper side of the guide rail seat (101) is fixedly connected to a moving pair (102), the upper side of the moving part of the moving pair (102) is fixedly connected to a propulsion frame (103), the positioning device (11) is installed on the upper side of the propulsion frame (103), the middle part of the upper side of the guide rail seat (101) is fixedly connected to a hydraulic cylinder (104), and the moving part of the hydraulic cylinder (104) is connected to the lower side of the propulsion frame (103).

6. The pipe bender for adjusting the pipe diameter according to claim 5 is characterized in that: The positioning device (11) comprises a third electric slide rail (111), the third electric slide rail (111) is fixedly connected to the propulsion frame (103), a moving part of the third electric slide rail (111) is fixedly connected to an assembly rod (112), and the assembly rod (112) can extend into the box structure of the assembly frame (91).

7. The pipe bender for adjusting the pipe diameter according to claim 6 is characterized in that: The assembly frame (91) further comprises a fixing device (12), the fixing device (12) being arranged at an upper position of the assembly frame (91), the fixing device (12) being used to fix the guide frame (84), a first connecting sleeve (121) being fixedly connected to the upper left side of the assembly frame (91), a first displacement frame (122) being sleeved on the first connecting sleeve (121), a first elastic member (123) being connected between the lower position of the first displacement frame (122) and the first connecting sleeve (121), the The lower end of the first displacement frame (122) is fixedly connected to a first trigger cone (124), and the first trigger cone (124) extends into the left position of the box structure inside the corresponding assembly frame (91). The right side of the first displacement frame (122) is fixedly connected to a fixing cone (125). The upper side position of the upper guide frame (84) of each assembly frame (91) is provided with a fixing groove (1210), and the fixing cone (125) extends into the fixing groove (1210) at the corresponding position.

8. The pipe bender for adjusting the pipe diameter according to claim 7 is characterized in that: The assembly frame (91) further comprises a locking device (13), wherein the locking device (13) is arranged at a lower position of the assembly frame (91), and the locking device (13) is used to lock the position of the assembly rod (112) and the assembly frame (91). A second connecting sleeve (131) is fixedly connected to the lower left side of the assembly frame (91), a second displacement frame (132) is mounted on the second connecting sleeve (131), and a second connecting sleeve (131) is connected between the upper position of the second displacement frame (132) and the second connecting sleeve (131). The elastic member (133) and the upper end of the second displacement frame (132) are fixedly connected with a locking cone (135), and the locking cones (135) respectively extend into the middle position of the box structure inside the corresponding assembly frame (91). A locking groove (1310) is opened at the middle position of the lower side of the assembly rod (112), and the locking cones (135) can extend into the locking groove (1310) of the assembly rod (112). The lower side of the second displacement frame (132) is fixedly connected with a second trigger cone (134).

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