CN221848293U - Angle-adjustable pipe bending machine - Google Patents

Abstract

The utility model relates to the field of pipe bending machines, in particular to an angle-adjustable pipe bending machine. Technical problems: in the use process of the pipe bending machine, most of the pipe bending machine is bent by manual pipe bending equipment because of complex structure, and the traditional pipe bending machine can only bend the straight pipe at a fixed angle when in use, so that the pipe bending machine is inflexible to use. The technical scheme is as follows: the angle-adjustable pipe bending machine comprises a fixed bottom plate, a moving assembly, a lifting assembly, a clamping assembly and a pipe bending assembly. According to the utility model, the moving assembly is arranged, the first driving motor is started to drive the threaded screw rod to rotate, so that the limit sliding block can drive the lifting assembly to move and adjust left and right, manual operation is reduced, automatic feeding is facilitated, the second driving motor is started to drive the rotating shaft to rotate through the pipe bending assembly, bending operation of a pipeline is realized, and multi-angle bending operation of the pipeline can be performed according to the adjusting angle of the movable supporting wheel.

Description

Angle adjustable pipe bending machine

Technical Field

The utility model relates to the field of pipe bending machines, in particular to a pipe bending machine with adjustable angles.

Background Art

The pipe bending machine is mainly based on the principle of vector pipe bending and uses microcomputer control to complete any spatial three-dimensional pipe shape required by the user. It is an important processing equipment for modern bending and shaping. The pipe bending machine refers to a machine used for bending pipes and can also be used as a jack. It is roughly divided into CNC pipe bending machines, hydraulic pipe bending machines, etc., and is used in pipeline laying and repair in power construction, road and railway construction, bridges, ships, etc. However, the existing pipe bending machines are mostly hydraulically controlled, with complex structures, large footprints, and high costs. Most of them are bent with manual pipe bending equipment. Manual pipe bending equipment is more suitable for bending a small number of pipes, but it is time-consuming and labor-intensive to bend batches of pipes, and the consistency is slightly poor, which brings many inconveniences to actual work. In addition, traditional pipe bending machines can only bend straight pipes at fixed angles when in use. When the bending angle needs to be changed, the fixing device of the pipe bending machine needs to be readjusted, which is very troublesome and inflexible to use, which can easily affect the convenience of use of the entire pipe bending machine.

Utility Model Content

In order to overcome the problem that in the process of using the pipe bending machine, most of the pipes are bent with manual bending equipment due to its complex structure, which brings many inconveniences to the actual work. In addition, the traditional pipe bending machine can only bend the straight pipe at a fixed angle when in use, which makes it inflexible to use.

The technical solution of the utility model is: an angle-adjustable pipe bending machine, comprising a fixed base plate, a first workbench, a second workbench, a limiting slide groove, a limiting clamping groove, a moving component, a lifting component, a clamping component, an arc-shaped slide groove and a pipe bending component. The first workbench is arranged at the top left end of the fixed base plate, and the second workbench is arranged at the top right end of the fixed base plate. A limiting slide groove is arranged at the rear side of the upper end surface of the first workbench, and limiting clamping grooves are arranged at the front and rear ends of the inner side wall of the limiting slide groove. A moving component is arranged inside the limiting slide groove, and a lifting component is installed on the top of the moving component. A clamping component is arranged at the top left end of the second workbench, an arc-shaped slide groove is arranged on the right side of the upper end surface of the second workbench, and a pipe bending component is arranged at the top of the second workbench and at the right end of the clamping component.

Preferably, by setting a moving component, starting the first drive motor to drive the rotation of the threaded screw rod, so that the limit slider can drive the lifting component to move left and right for adjustment, reducing manual operation and facilitating automatic feeding. The lifting component can enable the first hydraulic telescopic cylinder to drive the moving plate to adjust the height of the lifting, so that it is convenient to select a suitable pipe bending operation to flexibly adjust the height, and through the clamping component, start the second hydraulic telescopic cylinder to adjust the position of the moving frame, firmly clamp the pipe to be bent, move the pipe to the inside of the two groups of annular grooves or two groups of arc-shaped straight grooves according to actual use needs, and then start the second drive motor to drive the rotating shaft to rotate, thereby realizing the operation of bending the pipe, and the pipe can be bent at multiple angles according to the adjustment angle of the mobile support wheel, which effectively improves the applicability of use, and thus can greatly improve the convenience of use of the entire pipe bending machine.

Preferably, the moving assembly includes a first drive motor, a threaded screw, a limit slider and a limit block. The first drive motor is located at the left rear end of the first workbench, the threaded screw is located inside the limit slide groove, the left side of the threaded screw passes through the first workbench and is connected to the right output end of the first drive motor, and the outer wall of the threaded screw is threadedly connected to the limit slider. By starting the first drive motor to drive the threaded screw to rotate, the limit slider can drive the lifting assembly to move left and right, thereby reducing manual operation and facilitating automatic feeding.

Preferably, limit blocks are installed at both ends of the limit slider, the limit slider is slidably connected to the inside of the limit slot, and the two groups of limit blocks are respectively engaged and connected with the two groups of limit slots, which improves the stability of the limit slider driving the lifting assembly to move and adjust, and avoids the occurrence of offset.

Preferably, the lifting assembly includes a connecting plate, a first hydraulic telescopic cylinder, a first hydraulic telescopic rod, a movable plate, an arc-shaped groove and an elastic pad. The connecting plate is located at the top of the limit slider. The first hydraulic telescopic cylinders are installed at both the front and rear ends of the top of the connecting plate. The inner upper ends of the two groups of first hydraulic telescopic cylinders are connected to the first hydraulic telescopic rods. The tops of the two groups of first hydraulic telescopic rods are commonly connected to the same group of movable plates. An arc-shaped groove is provided on the upper end surface of the movable plate. An elastic pad is provided at the upper end of the arc-shaped groove. The pipe to be bent is placed on the upper end of the elastic pad on the arc-shaped groove. The first hydraulic telescopic cylinder is used to adjust the height of the movable plate, so that the height can be flexibly adjusted by selecting a suitable pipe bending operation.

Preferably, the clamping assembly includes a fixed frame, a first clamping groove, a second hydraulic telescopic cylinder, a second hydraulic telescopic rod, a movable frame and a second clamping groove. The fixed frame is located at the left rear end of the top of the second workbench, and the first clamping groove is provided at both upper and lower ends of the front side of the fixed frame. The second hydraulic telescopic cylinder is located at the left front end of the top of the second workbench, and the inner rear end of the second hydraulic telescopic cylinder is connected to the second hydraulic telescopic rod, and the movable frame is installed at the rear end of the second hydraulic telescopic rod. Second clamping grooves are provided at both upper and lower ends of the rear side of the movable frame corresponding to the first clamping groove. The position of the movable frame is adjusted by starting the second hydraulic telescopic cylinder to firmly clamp the pipe to be bent, thereby improving the convenience of bending operation.

Preferably, the bending pipe assembly includes a fixed support wheel, a movable support wheel, a second drive motor, a rotating shaft, a connecting shaft, a connecting rod, a limiting pulley, an annular groove, a clamping block and an arc-shaped straight groove. The fixed support wheel is located at the top center of the second workbench, and a movable support wheel is arranged at the top of the second workbench and at the rear end of the fixed support wheel. The second drive motor is located inside the second workbench, and the top output end of the second drive motor is connected to the rotating shaft, and the rotating shaft passes through the interior of the fixed support wheel and extends upward. A connecting shaft is arranged inside the movable support wheel, and the upper ends of the rotating shaft and the connecting shaft are connected with a connecting rod. A limiting pulley is installed at the bottom of the movable support wheel. The positioning pulley is slidably connected with the inside of the arc-shaped slide groove, the lower ends of the outer side walls of the fixed support wheel and the movable support wheel are provided with annular grooves, and the inner upper ends of the fixed support wheel and the movable support wheel are provided with clamping blocks. The inner sides of the two groups of clamping blocks are provided with arc-shaped straight grooves. The pipeline is moved to the inside of the two groups of annular grooves or the two groups of arc-shaped straight grooves according to actual use needs, and then the second drive motor is started to drive the rotating shaft to rotate. The movable support wheel is driven to move along the arc-shaped slide groove track through the setting of the connecting rod, thereby realizing the operation of bending the pipeline. The pipeline can be bent at multiple angles according to the adjustment angle of the movable support wheel, which effectively improves the applicability of use.

Preferably, the fixed support wheel and the movable support wheel are made of gold alloy as a whole, which provides a stable support structure and ensures the stability and durability of the pipe bending operation.

Beneficial effects of the utility model:

1. By setting up a composite movable adjustment structure of a moving component, a lifting component, a clamping component and a bending component to replace the original single structure, automatic feeding, multi-select bending operations and multi-angle adjustment of the pipe can be achieved, which effectively improves the applicability of use and can improve the convenience of use of the entire pipe bender to a certain extent;

2. By moving the assembly, start the first drive motor to drive the rotation of the threaded screw, so that the limit slider can drive the lifting assembly to move left and right, reduce manual operation, and facilitate automatic feeding. The two sets of limit blocks are respectively connected with the two sets of limit slots, which improves the stability of the limit slider driving the lifting assembly to move and adjust, and avoids the phenomenon of deviation;

3. Through the lifting assembly, the first hydraulic telescopic cylinder enables the movable plate to be raised and lowered to adjust the height, so that the height can be flexibly adjusted by selecting the appropriate bending operation;

4. Through the clamping assembly, start the second hydraulic telescopic cylinder to adjust the position of the mobile frame, firmly clamp the pipe to be bent, and improve the convenience of pipe bending operation;

5. Through the pipe bending assembly, the pipe is moved to the inside of the two sets of annular grooves or two sets of arc-shaped straight grooves according to actual use needs, and then the second drive motor is started to drive the rotating shaft to rotate. The connecting rod is set to drive the movable support wheel to move along the arc-shaped slide groove track, thereby realizing the operation of bending the pipe. The pipe can be bent at multiple angles according to the adjustment angle of the movable support wheel, which effectively improves the applicability of use.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a three-dimensional structure of the present utility model;

FIG2 is a schematic diagram of the three-dimensional structure of the lifting assembly of the present invention;

FIG3 is a schematic diagram of a disassembled three-dimensional structure of a mobile component of the present invention;

FIG. 4 is a schematic diagram of the three-dimensional structure of the installation of the elbow assembly of the present invention.

Description of the accompanying drawings: 1-fixed bottom plate, 2-first workbench, 3-second workbench, 4-limiting slide, 5-limiting card slot, 6-moving assembly, 7-lifting assembly, 8-clamping assembly, 9-arc slide, 10-bending pipe assembly, 601-first driving motor, 602-threaded screw, 603-limiting slider, 604-limiting card block, 701-connecting plate, 702-first hydraulic telescopic cylinder, 703-first hydraulic telescopic rod, 704-moving plate, 705 -arc groove, 706-elastic pad, 801-fixed frame, 802-first clamping groove, 803-second hydraulic telescopic cylinder, 804-second hydraulic telescopic rod, 805-movable frame, 806-second clamping groove, 101-fixed support wheel, 102-movable support wheel, 103-second drive motor, 104-rotating shaft, 105-connecting shaft, 106-connecting rod, 107-limiting pulley, 108-annular groove, 109-clamping block, 110-arc straight groove.

DETAILED DESCRIPTION

The utility model is further described below in conjunction with the accompanying drawings and embodiments.

Please refer to Figures 1-3. The utility model provides an embodiment: an angle-adjustable pipe bending machine, including a fixed base plate 1, a first workbench 2, a second workbench 3, a limiting slide 4, a limiting card slot 5, a moving component 6, a lifting component 7, a clamping component 8, an arc-shaped slide 9 and a pipe bending component 10. The first workbench 2 is arranged at the left end of the top of the fixed base plate 1, and the second workbench 3 is arranged at the right end of the top of the fixed base plate 1. The rear side of the upper end surface of the first workbench 2 is provided with a limiting slide 4, and the inner side wall of the limiting slide 4 is provided with limiting card slots 5 at both ends. The interior of the limiting slide 4 is provided with a moving component 6, and the moving component Component 6 includes a first drive motor 601, a threaded screw 602, a limit slider 603 and a limit block 604. The first drive motor 601 is located at the left rear end of the first workbench 2, the threaded screw 602 is located inside the limit slide 4, the left side of the threaded screw 602 passes through the first workbench 2 and is connected to the right output end of the first drive motor 601, and the outer wall of the threaded screw 602 is threadedly connected to the limit slider 603. By starting the first drive motor 601 to drive the threaded screw 602 to rotate, the limit slider 603 can drive the lifting component 7 to move left and right, reducing manual operation and facilitating automatic The limit block 604 is installed at both ends of the limit slider 603, and the limit slider 603 is connected to the inner sliding of the limit slide 4. The two groups of limit blocks 604 are respectively connected with the two groups of limit slots 5, which improves the stability of the limit slider 603 driving the lifting component 7 to move and adjust, and avoids the phenomenon of deviation. The lifting component 7 is installed on the top of the moving component 6. The lifting component 7 includes a connecting plate 701, a first hydraulic telescopic cylinder 702, a first hydraulic telescopic rod 703, a moving plate 704, an arc groove 705 and an elastic pad 706. The connecting plate 701 is located at the top of the limit slider 603. First hydraulic telescopic cylinders 702 are installed at both the front and rear ends of the top of 701, and the internal upper ends of the two groups of first hydraulic telescopic cylinders 702 are connected to first hydraulic telescopic rods 703. The tops of the two groups of first hydraulic telescopic rods 703 are commonly connected to the same group of moving plates 704. The upper end surface of the moving plate 704 is provided with an arc groove 705, and the upper end of the arc groove 705 is provided with an elastic pad 706. The pipe to be bent is placed on the upper end of the elastic pad 706 on the arc groove 705. The first hydraulic telescopic cylinder 702 enables the moving plate 704 to be raised and lowered for height adjustment, so that the height can be flexibly adjusted by selecting a suitable pipe bending operation.

Please refer to FIG. 4. In this embodiment, a clamping assembly 8 is provided at the left end of the top of the second workbench 3. The clamping assembly 8 includes a fixed frame 801, a first clamping groove 802, a second hydraulic telescopic cylinder 803, a second hydraulic telescopic rod 804, a movable frame 805 and a second clamping groove 806. The fixed frame 801 is located at the left rear end of the top of the second workbench 3. The first clamping groove 802 is provided at both the upper and lower ends of the front side of the fixed frame 801. The second hydraulic telescopic cylinder 803 is located at the left front end of the top of the second workbench 3. The inner rear end of the second hydraulic telescopic cylinder 803 is connected to the second hydraulic telescopic rod 804. The rear end of the second hydraulic telescopic rod 804 is installed with a movable frame 805. The upper and lower ends of the rear side of the movable frame 805 are connected to the first clamping groove 806. 02, a second clamping groove 806 is provided at the corresponding position, and the position of the mobile frame 805 is adjusted by starting the second hydraulic telescopic cylinder 803 to firmly clamp the pipe to be bent, thereby improving the convenience of pipe bending operation. An arc-shaped slide groove 9 is provided on the right side of the upper end surface of the second workbench 3, and a bending pipe assembly 10 is provided at the top of the second workbench 3 and at the right end of the clamping assembly 8. The bending pipe assembly 10 includes a fixed support wheel 101, a movable support wheel 102, a second drive motor 103, a rotating shaft 104, a connecting shaft 105, a connecting rod 106, a limiting pulley 107, an annular groove 108, a clamping block 109 and an arc-shaped straight groove 110. The fixed support wheel 101 is located at the top center of the second workbench 3. 3 and is provided with a movable support wheel 102 at the top and at the rear end of the fixed support wheel 101, the second drive motor 103 is located inside the second workbench 3, the top output end of the second drive motor 103 is connected with a rotating shaft 104, and the rotating shaft 104 passes through the interior of the fixed support wheel 101 and extends upward, a connecting shaft 105 is provided inside the movable support wheel 102, and a connecting rod 106 is connected to the upper ends of the rotating shaft 104 and the connecting shaft 105, and a limiting pulley 107 is installed at the bottom of the movable support wheel 102, and the limiting pulley 107 is slidably connected with the inside of the arc-shaped slide groove 9, and an annular groove 108 is provided at the lower ends of the outer side walls of the fixed support wheel 101 and the movable support wheel 102, and the inner A clamping block 109 is provided at the upper end of each side, and an arc-shaped straight groove 110 is opened on the inner side of the two groups of clamping blocks 109. The pipe is moved to the inside of the two groups of annular grooves 108 or the two groups of arc-shaped straight grooves 110 according to actual use needs, and then the second drive motor 103 is started to drive the rotating shaft 104 to rotate. The connecting rod 106 is used to drive the movable support wheel 102 to move along the track of the arc-shaped slide groove 9, so as to realize the operation of bending the pipe. The pipe can be bent at multiple angles according to the adjustment angle of the movable support wheel 102, which effectively improves the applicability of use. The fixed support wheel 101 and the movable support wheel 102 are made of gold alloy as a whole, which provides a stable support structure to ensure the stability and durability of the pipe bending operation.

When the pipe bending machine is working, firstly, the pipe to be bent is placed on the upper end of the elastic pad 706 on the arc groove 705, and the first hydraulic telescopic cylinder 702 is started through the lifting assembly 7 to enable the movable plate 704 to be lifted and lowered to adjust the height, so as to facilitate the selection of a suitable pipe bending operation to flexibly adjust the height, and then the first driving motor 601 is started through the moving assembly 6 to drive the rotation of the threaded screw 602, so that the limit slider 603 can drive the lifting assembly 7 to move left and right, reducing manual operation and facilitating automatic feeding. The two groups of limit blocks 604 are respectively engaged with the two groups of limit slots 5, which improves the stability of the limit slider 603 driving the lifting assembly 7 to move and adjust, and avoids the phenomenon of deviation;

Then, the second hydraulic telescopic cylinder 803 is started through the clamping assembly 8 to adjust the position of the moving frame 805, so as to firmly clamp the pipe to be bent, thereby improving the convenience of the bending operation;

Then, the pipeline is moved to the inside of the two groups of annular grooves 108 or the two groups of arc-shaped straight grooves 110 according to actual use needs, and then the second drive motor 103 is started to drive the rotating shaft 104 to rotate. The connecting rod 106 is set to drive the movable support wheel 102 to move along the track of the arc-shaped slide groove 9, thereby realizing the operation of bending the pipeline. The pipeline can be bent at multiple angles according to the adjustment angle of the movable support wheel 102, which effectively improves the applicability of use. The fixed support wheel 101 and the movable support wheel 102 are made of gold alloy as a whole, which provides a stable support structure to ensure the stability and durability of the pipe bending operation.

Through the above steps, the pipe to be bent is placed on the upper end of the elastic pad 706 on the arc groove 705, and the lifting assembly 7 can enable the first hydraulic telescopic cylinder 702 to drive the movable plate 704 to adjust the height of the lifting, so as to select a suitable bending operation to flexibly adjust the height, and then start the first drive motor 601 to drive the rotation of the threaded screw 602, so that the limit slider 603 can drive the lifting assembly 7 to move left and right, reduce manual operation, and facilitate automatic feeding, and adjust the position of the movable frame 805 by starting the second hydraulic telescopic cylinder 803, so that the pipe to be bent is firmly clamped, and the pipe is moved to the inside of the two groups of annular grooves 108 or the two groups of arc straight grooves 110 according to actual use needs, and then the second drive motor 103 is started to drive the rotating shaft 104 to rotate, so as to realize the operation of bending the pipe, and the pipe can be bent at multiple angles according to the adjustment angle of the mobile support wheel 102, which effectively improves the applicability of use, and thus can greatly improve the convenience of use of the entire pipe bending machine.

The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims (7)

1. An angle-adjustable pipe bending machine, comprising a fixed base plate (1); characterized in that it also comprises a first workbench (2), a second workbench (3), a limit slide groove (4), a limit clamping groove (5), a moving assembly (6), a lifting assembly (7), a clamping assembly (8), an arc-shaped slide groove (9) and a pipe bending assembly (10), wherein the first workbench (2) is arranged at the left end of the top of the fixed base plate (1), the second workbench (3) is arranged at the right end of the top of the fixed base plate (1), and the upper end of the first workbench (2) is provided with a plurality of movable members (6), a lifting assembly (7), a clamping assembly (8), an arc-shaped slide groove (9) and a pipe bending assembly (10). A limiting slide groove (4) is provided on the rear side of the end surface, and limiting clamping grooves (5) are provided on both the front and rear ends of the inner side wall of the limiting slide groove (4). A moving component (6) is provided inside the limiting slide groove (4), and a lifting component (7) is installed on the top of the moving component (6). A clamping component (8) is provided on the left end of the top of the second workbench (3), an arc-shaped slide groove (9) is provided on the right side of the upper end surface of the second workbench (3), and a bending pipe component (10) is provided on the top of the second workbench (3) and at the right end of the clamping component (8). 2. An angle-adjustable pipe bending machine according to claim 1, characterized in that: the moving component (6) includes a first driving motor (601), a threaded screw (602), a limit slider (603) and a limit block (604), the first driving motor (601) is located at the left rear end of the first workbench (2), the threaded screw (602) is located inside the limit slide groove (4), the left side of the threaded screw (602) passes through the first workbench (2) and is connected to the right output end of the first driving motor (601), and the outer wall of the threaded screw (602) is threadedly connected to the limit slider (603). 3. An angle-adjustable pipe bending machine according to claim 2, characterized in that: limit blocks (604) are installed at both ends of the limit slider (603), the limit slider (603) is slidably connected to the inside of the limit slot (4), and the two groups of limit blocks (604) are respectively engaged and connected with the two groups of limit slots (5). 4. An angle-adjustable pipe bending machine according to claim 1, characterized in that: the lifting component (7) includes a connecting plate (701), a first hydraulic telescopic cylinder (702), a first hydraulic telescopic rod (703), a movable plate (704), an arc groove (705) and an elastic pad (706), the connecting plate (701) is located at the top of the limiting slider (603), the first hydraulic telescopic cylinder (702) is installed at the front and rear ends of the top of the connecting plate (701), the inner upper ends of the two groups of first hydraulic telescopic cylinders (702) are connected to the first hydraulic telescopic rod (703), the tops of the two groups of first hydraulic telescopic rods (703) are commonly connected to the same group of movable plates (704), the upper end surface of the movable plate (704) is provided with an arc groove (705), and the upper end of the arc groove (705) is provided with an elastic pad (706). 5. An angle-adjustable pipe bending machine according to claim 1, characterized in that: the clamping assembly (8) includes a fixed frame (801), a first clamping groove (802), a second hydraulic telescopic cylinder (803), a second hydraulic telescopic rod (804), a movable frame (805) and a second clamping groove (806), the fixed frame (801) is located at the left rear end of the top of the second workbench (3), the first clamping groove (802) is provided at both upper and lower ends of the front side of the fixed frame (801), the second hydraulic telescopic cylinder (803) is located at the left front end of the top of the second workbench (3), the inner rear end of the second hydraulic telescopic cylinder (803) is connected to the second hydraulic telescopic rod (804), the movable frame (805) is installed at the rear end of the second hydraulic telescopic rod (804), and the second clamping groove (806) is provided at both upper and lower ends of the rear side of the movable frame (805) corresponding to the first clamping groove (802). 6. An angle-adjustable pipe bender according to claim 1, characterized in that: the pipe bending assembly (10) includes a fixed support wheel (101), a movable support wheel (102), a second drive motor (103), a rotating shaft (104), a connecting shaft (105), a connecting rod (106), a limiting pulley (107), an annular groove (108), a clamping block (109) and an arc-shaped straight groove (110), the fixed support wheel (101) is located at the top center of the second workbench (3), the movable support wheel (102) is arranged at the top of the second workbench (3) and at the rear end of the fixed support wheel (101), the second drive motor (103) is located inside the second workbench (3), and the top output end of the second drive motor (103) is connected to the second workbench (3). A rotating shaft (104) is provided, and the rotating shaft (104) passes through the interior of the fixed support wheel (101) and extends upwards; a connecting shaft (105) is provided inside the movable support wheel (102); the upper ends of the rotating shaft (104) and the connecting shaft (105) are connected to a connecting rod (106); a limiting pulley (107) is installed at the bottom of the movable support wheel (102); the limiting pulley (107) is slidably connected to the interior of the arc-shaped slide groove (9); an annular groove (108) is provided at the lower ends of the outer side walls of the fixed support wheel (101) and the movable support wheel (102); a clamping block (109) is provided at the inner upper ends of the fixed support wheel (101) and the movable support wheel (102); and an arc-shaped straight groove (110) is provided on the inner sides of the two groups of clamping blocks (109). 7. An angle-adjustable pipe bender according to claim 6, characterized in that the fixed support wheel (101) and the movable support wheel (102) are made of gold alloy as a whole.