阅读说明：本技术 一种汽车生产制造用管件加工的弯管机及其使用方法 (pipe bending machine for machining pipe fittings for automobile production and manufacturing and using method of pipe bending machine ) 是由 吴磊 朱明祥 杨刚 于 2019-08-31 设计创作，主要内容包括：本发明公开了一种汽车生产制造用管件加工的弯管机及其使用方法,涉及弯管机技术领域。本发明包括壳体、螺旋升降机和转盘；壳体内安装有一螺旋升降机,螺旋升降机包括丝杆；壳体上表面分别开有电机口和升降口；丝杆的顶端贯穿升降口并转动连接有一阶梯轮模；丝杆的底端固定有一支撑板。本发明通过螺旋升降机带动阶梯轮模升降,并以固定架为基础人为转动转动模,最后在液压缸的驱动下,使与管件相适配的夹模和环形槽将管件夹紧；最后电机通过第二齿轮与第一齿轮的啮合传动来驱动阶梯轮模和转盘以丝杆为转动中心转动,实现对管件的折弯处理,此过程可提高阶梯轮模和夹模的更换效率,减轻了人们的劳动压力,提高了弯管机的生产效率。(the invention discloses a pipe bender for machining pipe fittings for automobile production and manufacturing and a using method thereof, and relates to the technical field of pipe benders. The invention comprises a shell, a spiral lifter and a turntable; a spiral lifter is arranged in the shell and comprises a screw rod; the upper surface of the shell is respectively provided with a motor port and a lifting port; the top end of the screw rod penetrates through the lifting port and is rotatably connected with a step pulley mold; a supporting plate is fixed at the bottom end of the screw rod. The invention drives the step wheel die to lift through the spiral lifter, manually rotates the rotating die on the basis of the fixed frame, and finally clamps the pipe fitting through the clamping die and the annular groove which are matched with the pipe fitting under the driving of the hydraulic cylinder; finally, the motor drives the step wheel die and the rotary table to rotate by taking the screw rod as a rotation center through the meshing transmission of the second gear and the first gear, so that the bending treatment of the pipe fitting is realized, the replacement efficiency of the step wheel die and the clamping die can be improved in the process, the labor pressure of people is reduced, and the production efficiency of the pipe bender is improved.)

1. a pipe bender for machining pipe fittings for automobile production and manufacturing comprises a shell (1), a spiral lifter (2) and a turntable (3); a spiral lifter (2) is installed in the shell (1), and the spiral lifter (2) comprises a screw rod (201); the method is characterized in that:

the upper surface of the shell (1) is respectively provided with a motor port (101) and a lifting port (102);

the top end of the screw rod (201) penetrates through the lifting port (102) and is rotatably connected with a step pulley mold (4); a supporting plate (202) is fixed at the bottom end of the screw rod (201), and the supporting plate (202) is positioned in the shell (1);

The stair wheel mold (4) comprises a stair column (5) and a transmission cylinder (6), a through hole (501) is formed in the stair column (5), and the through hole (501) is rotatably connected with the screw rod (201); the peripheral side surface of the stair column (5) is respectively provided with a plurality of annular grooves (502) with different diameters along the axial direction; a transmission cylinder (6) is fixed on the end surface of the bottom end of the stair column (5);

A first gear (601) is fixed on the peripheral side surface of the transmission cylinder (6), and the peripheral side surface of the transmission cylinder (6) is in sliding fit with a rotating plate (7);

the first gear (601) is in meshing transmission with a second gear (801) fixed on an output shaft of the motor (8), and the motor (8) penetrates through the motor port (101) and is installed on the supporting plate (202);

The rotary table (3) comprises a rotary mold (9) and a fixed frame (10); the rotating die (9) comprises a polygonal plate (901) and a clamping die (902); a plurality of rotating columns (903) are fixed between the corners of the two polygonal plates (901) which are arranged correspondingly; clamping dies (902) with different sizes are rotatably matched on the plurality of rotating columns (903);

The fixing frame (10) comprises a positioning plate (1001), a supporting plate (1002) and a fixing column (1003); a fixing column (1003) is fixed between the positioning plate (1001) and the supporting plate (1002), and the fixing column (1003) is in running fit with the polygonal plate (901); the positioning plate (1001) is connected with the upper surface of a polygonal plate (901) through a positioning pin (11); a second ball (1004) is arranged between the upper surface of the supporting plate (1002) and the lower surface of the other polygonal plate (901);

The supporting plate (1002) and the fixed box (12) form limiting sliding fit, and the fixed box (12) is fixedly arranged on the upper surface of the rotating plate (7); a hydraulic cylinder (13) is installed on the fixed box (12), and an output shaft of the hydraulic cylinder (13) is connected with the peripheral side face of the support plate (1002).

2. the pipe bender for machining pipe fittings for automobile production and manufacturing according to claim 1, wherein a guide hole (701) is formed at the end of the rotating plate (7), and a plurality of guide grooves (7011) are uniformly formed on the inner surface of the guide hole (701);

The circumference side of transmission section of thick bamboo (6) is fixed with a plurality of gibs (602) along the equipartition on the axial direction, gib (602) and guide way (7011) form sliding fit.

3. The pipe bender for machining pipe fittings for automobile manufacturing according to claim 1, wherein the lower surface of the rotating plate (7) is provided with a plurality of ball grooves, the ball grooves form a spherical pair fit with the first ball (702), and the first ball (702) contacts with the upper surface of the shell (1).

4. The bending machine for machining the pipe fitting for the automobile production and manufacturing according to claim 1, wherein a blind hole (9011) penetrating through the rotating column (903) is formed in the upper surface of the polygonal plate (901); the positioning plate (1001) is provided with a plurality of positioning holes;

The positioning pin (11) penetrates through the positioning hole and the blind hole (9011) in sequence.

5. the bending machine for machining a pipe for automobile manufacturing according to claim 1, wherein a plurality of second balls (1004) are fitted to a lower surface spherical pair of the polygonal plate (901); the second ball (1004) is in contact with the upper surface of the support plate (1002).

6. The bending machine for machining the pipe fitting for the automobile production and manufacturing according to claim 1, wherein a rotating cylinder (904) penetrates between the two polygonal plates (901), and the rotating cylinder (904) is in rotating fit with the fixed cylinder (1003) through a bearing.

7. the bending machine for machining pipes for automobile manufacturing according to claim 1, wherein the spiral elevator (2) further comprises a worm, and a hand wheel (203) is mounted on the end of the worm.

8. the pipe bender for machining the pipe fitting for the automobile production and manufacturing according to claim 1, wherein a guide plate (14) is fixedly installed at the top end of the screw rod (201), a straight notch (1401) is formed at the end part of the guide plate (14), and the straight notch (1401) is in guiding fit with the top end of the fixed column (1003).

9. The use method of the pipe bender for machining pipe fittings for automobile production and manufacturing according to any one of claims 1 to 8, is characterized by comprising the following steps:

step one, a worm is rotated through a hand-operated wheel (203), and a screw rod drives a step wheel die (4) to lift; selecting a proper annular groove (502) to enable the pipe fitting to be tangent to the annular groove (502);

Secondly, rotating the rotating die (9) on the basis of the fixed frame (10), and selecting a clamping die (902) matched with the pipe fitting and the annular groove (502); the positioning pin (11) penetrates through the positioning hole and the blind hole (9011) in sequence;

step three, starting the hydraulic cylinder (13), and enabling the support plate (1002) to slide on the fixed box (12) until the clamping die (902) and the annular groove (502) clamp the pipe fitting;

and step four, starting the motor (8), clamping the pipe fitting by the step wheel die (4) and the turntable (3) to rotate by taking the screw rod (201) as a rotation center, and manufacturing the pipe fitting into a bent pipe.

Technical Field

The invention belongs to the technical field of pipe bending machines, and particularly relates to a pipe bending machine for machining pipe fittings for automobile production and manufacturing and a using method of the pipe bending machine.

Background

in daily life, pipes with different twisting degrees or bending degrees are often needed to meet the actual use requirements and performance requirements of equipment, so that people often use pipe bending machines to bend pipes with different diameters; pipe bending machines are roughly divided into numerical control pipe bending machines, hydraulic pipe bending machines and the like; the pipe bender is also needed for processing parts such as an oil pipe, an exhaust pipe and the like on the automobile, and the pipe bender has an important position in the production and manufacturing industry due to the simple operation and high working efficiency.

However, when the existing pipe bender needs to process pipes with different diameters, the wheel dies and the clamping dies with different sizes need to be manually replaced according to the sizes of the pipes, so that the labor pressure of people is increased, and the working efficiency of the pipe bender is reduced; therefore, a pipe bender for machining pipe fittings for automobile production and manufacturing needs to be researched to improve the replacement efficiency of the wheel die and the clamping die of the pipe bender.

Disclosure of Invention

the invention aims to provide a pipe bender for machining pipe fittings for automobile production and manufacturing and a use method thereof, wherein a step wheel die is driven to lift by a spiral lifter, a rotating die is manually rotated on the basis of a fixed frame, and finally, a clamping die and an annular groove which are matched with the pipe fittings are driven by a hydraulic cylinder to clamp the pipe fittings; finally, the motor drives the step wheel die and the rotary table to rotate by taking the screw rod as a rotation center through the meshing transmission of the second gear and the first gear, so that the pipe fitting is bent, and the problems that the manual replacement efficiency of the wheel die and the clamping die of the conventional pipe bending machine is low, and the labor pressure of people and the working efficiency of the pipe bending machine are increased are solved.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a pipe bender for machining pipe fittings for automobile production and manufacturing, which comprises a shell, a spiral lifter and a turntable, wherein the shell is provided with a first end and a second end; a spiral lifter is arranged in the shell and comprises a screw rod;

The upper surface of the shell is respectively provided with a motor port and a lifting port;

The top end of the screw rod penetrates through the lifting port and is rotatably connected with a step pulley mold; a supporting plate is fixed at the bottom end of the screw rod and is positioned in the shell;

The step wheel die comprises a step column and a transmission cylinder, wherein a through hole is formed in the step column and is in rotary connection with the screw rod; the peripheral side surface of the stair column is respectively provided with a plurality of annular grooves with different diameters along the axial direction; a transmission cylinder is fixed on the end surface of the bottom end of the stair column;

A first gear is fixed on the peripheral side surface of the transmission cylinder, and the peripheral side surface of the transmission cylinder is in sliding fit with a rotating plate;

The first gear is in meshing transmission with a second gear fixed on an output shaft of the motor, and the motor penetrates through a motor port and is arranged on the supporting plate;

the turntable comprises a rotating die and a fixed frame; the rotating die comprises a polygonal plate and a clamping die; a plurality of rotating columns are fixed between the corners of the two polygonal plates which are correspondingly arranged; clamping dies with different sizes are matched on the plurality of rotating columns in a rotating mode;

The fixing frame comprises a positioning plate, a supporting plate and a fixing column; a fixed column is fixed between the positioning plate and the supporting plate, and the fixed column is in running fit with the polygonal plate; the positioning plate is connected with the upper surface of a polygonal plate through a positioning pin; a second ball is arranged between the upper surface of the supporting plate and the lower surface of the other polygonal plate;

the supporting plate and the fixed box form limit sliding fit, and the fixed box is fixedly arranged on the upper surface of the rotating plate; and a hydraulic cylinder is installed on the fixed box, and an output shaft of the hydraulic cylinder is connected with the peripheral side surface of the supporting plate.

furthermore, a guide hole is formed in the end part of the rotating plate, and a plurality of guide grooves are uniformly distributed in the inner surface of the guide hole;

A plurality of guide strips are uniformly distributed and fixed on the circumferential side surface of the transmission cylinder along the axial direction, and the guide strips and the guide grooves form sliding fit.

Furthermore, the lower surface of the rotating plate is provided with a plurality of ball grooves, the ball grooves and the first balls form spherical pair matching, and the first balls are in contact with the upper surface of the shell.

Furthermore, the upper surface of the polygonal plate is provided with a blind hole penetrating through the rotating column; the positioning plate is provided with a plurality of positioning holes;

The positioning pin penetrates through the positioning hole and the blind hole in sequence.

Furthermore, a plurality of second balls are matched with the spherical pair on the lower surface of the polygonal plate; the second ball contacts with the upper surface of the support plate.

Furthermore, a rotating cylinder penetrates through the two polygonal plates, and the rotating cylinder is in rotating fit with the fixing column through a bearing.

further, the spiral elevator also comprises a worm, and a hand wheel is installed at the end part of the worm.

furthermore, a guide plate is fixedly mounted at the top end of the screw rod, a straight notch is formed in the end portion of the guide plate, and the straight notch and the top end of the fixed column form guiding fit.

the use method of the pipe bender for machining the pipe fittings for automobile production and manufacturing comprises the following steps:

step one, rotating a worm through a hand-operated wheel, and enabling a screw rod to drive a step wheel die to lift; selecting a proper annular groove to ensure that the pipe fitting is tangent to the annular groove;

rotating the rotating mold on the basis of the fixed frame, and selecting a mold clamping matched with the pipe fitting and the annular groove; the positioning pin sequentially penetrates through the positioning hole and the blind hole;

Starting the hydraulic cylinder, and enabling the supporting plate to slide on the fixed box until the clamping die and the annular groove clamp the pipe fitting;

And step four, starting the motor, rotating the stepped wheel die and the turntable to clamp the pipe fitting to rotate by taking the screw rod as a rotation center, and manufacturing the pipe fitting into a bent pipe.

The invention has the following beneficial effects:

1. The invention drives the step wheel die to lift through the spiral lifter, manually rotates the rotating die on the basis of the fixed frame, and finally clamps the pipe fitting through the clamping die and the annular groove which are matched with the pipe fitting under the driving of the hydraulic cylinder; finally, the motor drives the step wheel die and the rotary table to rotate by taking the screw rod as a rotation center through the meshing transmission of the second gear and the first gear, so that the pipe fitting is bent.

2. the screw rod of the spiral lifter drives the step wheel die to lift, and the rotating plate is based on the upper surface of the shell and forms sliding fit with the transmission cylinder, so that the spatial positions of the rotating plate, the fixed box and the turntable cannot be influenced by the lifting of the step wheel die; the transmission cylinder drives the rotating plate, the fixed box and the turntable to rotate simultaneously through the matching of the guide grooves and the guide strips, so that the bending treatment of the pipe fitting between the annular groove and the clamping die is realized; the influence of the stepped wheel die on the replacement of the annular grooves and the replacement of different clamping dies on the rotating die is effectively avoided in the process, the efficiency of switching the annular grooves with different sizes of the stepped wheel die is improved, and the time of people is saved.

3. The rotary die is rotated on the basis of the fixing frame, and the position of the clamping die matched with the annular groove and the pipe fitting is locked by matching the positioning pin with the positioning hole and the blind hole.

of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 2;

FIG. 4 is a schematic structural diagram of a turntable according to the present invention;

FIG. 5 is a schematic structural view of the stair nosing of the present invention;

FIG. 6 is a schematic view of the construction of the rotating plate of the present invention;

In the drawings, the components represented by the respective reference numerals are listed below:

1-housing, 2-screw elevator, 3-rotary table, 4-step wheel mold, 5-step column, 6-transmission cylinder, 7-rotary plate, 8-motor, 9-rotary mold, 10-fixed frame, 11-positioning pin, 12-fixed box, 13-hydraulic cylinder, 14-guide plate, 101-motor port, 102-lifting port, 201-screw rod, 202-support plate, 203-hand wheel, 501-through hole, 502-annular groove, 601-first gear, 602-guide strip, 701-guide hole, 702-first ball, 801-second gear, 901-polygonal plate, 902-clamp mold, 903-rotary column, 904-rotary cylinder, 1001-positioning plate, 1002-support plate, 1003-fixed column, 1004-second ball, 1401-straight notch, 7011-guide groove, 9011-blind hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

in the description of the present invention, it is to be understood that the terms "disposed," "open," "bottom," "top," "axial," "inner," "peripheral" and the like are used merely for convenience in describing the invention and to simplify the description, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

As shown in fig. 1-6, the present invention is a pipe bender for processing pipe fittings for automobile production and manufacturing, comprising a housing 1, a spiral elevator 2 and a turntable 3; in addition, the limiting pipe die or the bench clamp screw rod and the like are all the prior art and are not innovation points of the application, so that excessive description is not needed; a spiral lifter 2 is installed in the shell 1, the spiral lifter 2 is the prior art, the lifting of the screw rod 201 is realized through the matching of a worm and gear and the matching of a nut screw rod 201, and the spiral lifter 2 comprises the screw rod 201;

The upper surface of the shell 1 is respectively provided with a motor port 101 and a lifting port 102, and the motor port 101 provides a lifting channel for the lifting of the motor 8 on the supporting plate 202; the lifting port 102 provides a lifting channel for lifting the transmission cylinder 6;

The top end of the screw rod 201 penetrates through the lifting port 102 and is rotatably connected with a step wheel die 4; a supporting plate 202 is fixed at the bottom end of the screw rod 201, and the supporting plate 202 is positioned in the shell 1;

The step wheel mold 4 comprises a step column 5 and a transmission cylinder 6, a through hole 501 is formed in the step column 5, and the through hole 501 is rotatably connected with the screw rod 201 through a bearing; the peripheral side surfaces of the stair posts 5 are respectively provided with three annular grooves 502 with different diameters along the axial direction, namely the peripheral side surfaces of three cylinders of the stair posts 5 are respectively provided with the annular grooves 502, the diameters of semicircular or arc-shaped profiles of the sections of the three annular grooves 502 are different, and the diameters can be designed according to the diameters of pipe fittings which are frequently bent by people; a transmission cylinder 6 is fixed on the end surface of the bottom end of the stair post 5;

a first gear 601 is fixed on the peripheral side surface of the transmission cylinder 6, and the peripheral side surface of the transmission cylinder 6 is in sliding fit with a rotating plate 7;

The first gear 601 is in meshed transmission with a second gear 801 fixed on an output shaft of the motor 8, and the motor 8 penetrates through the motor port 101 and is installed on the support plate 202;

the turntable 3 comprises a rotating die 9 and a fixed frame 10; the rotating die 9 comprises a polygonal plate 901 and a clamping die 902, wherein the polygonal plate 901 is a three-side plate, and the lengths of the sides of the three-side plate are different; three rotating columns 903 are fixed between the corners of the two correspondingly arranged polygonal plates 901, so that the three rotating columns 903 are arranged in a triangular mode, and the corners of the polygonal plates 901 are subjected to fillet treatment; the three rotating columns 903 are rotatably matched with clamping dies 902 with different sizes, wherein the rotating columns 903 can be in clearance fit with the clamping dies 902, or the rotating columns 90 are rotatably connected with the clamping dies 902 through bearings; the annular grooves on the three clamping dies 90 are arranged according to the size of the three annular grooves 502;

the fixing frame 10 comprises a positioning plate 1001, a supporting plate 1002 and a fixing column 1003; a fixing column 1003 is fixed between the positioning plate 1001 and the supporting plate 1002, and the fixing column 1003 and the polygonal plate 901 form rotating fit; the positioning plate 1001 is connected with the upper surface of a polygonal plate 901 through a positioning pin 11, so that the rotating die 9 and the fixed frame 10 are relatively fixed; a second ball 1004 is arranged between the upper surface of the support plate 1002 and the lower surface of the other polygonal plate 901, and the second ball 1004 can reduce the friction force between the support plate 1002 and the lower polygonal plate 901;

The supporting plate 1002 and the fixed box 12 form a limiting sliding fit, the limiting sliding fit can adopt a mode of sliding fit of a T-shaped sliding groove and a T-shaped block, the fixed box 12 is fixedly arranged on the upper surface of the rotating plate 7, and the fixed box 12 is mainly used for increasing the height of the rotating disc 3 and can be reasonably used according to actual conditions; the fixed box 12 is provided with a hydraulic cylinder 13, an output shaft of the hydraulic cylinder 13 is connected with the peripheral side surface of the support plate 1002, and the hydraulic cylinder 13 drives the clamping die 902 on the rotating die 9 to be close to the annular groove 502 mainly through the support plate 100, so that the pipe fitting can be clamped conveniently.

wherein, the end of the rotating plate 7 is provided with a guide hole 701, and the inner surface of the guide hole 701 is uniformly provided with three guide grooves 7011;

three guide strips 602 are uniformly distributed and fixed on the peripheral side surface of the transmission cylinder 6 along the axial direction, the guide strips 602 form sliding fit with the guide grooves 7011, the up-down movement can be guaranteed, the spatial position of the rotating plate 7 cannot be influenced, and the transmission cylinder 6 rotates to drive the rotating plate 7 to rotate together.

the lower surface of the rotating plate 7 is provided with a plurality of ball grooves, the ball grooves and the first balls 702 form a spherical pair fit, the first balls 702 are in contact with the upper surface of the housing 1, and the first balls 702 reduce the contact friction force between the rotating plate 7 and the upper surface of the housing 1 when rotating.

wherein, the upper surface of one polygonal plate 901 is provided with a blind hole 9011 which penetrates through the rotating column 903; the positioning plate 1001 is provided with three positioning holes; the three positioning holes are respectively positioned on a circular track formed by the three clamping dies 902 by taking the fixed column 1003 as a rotation center, so that when different clamping dies 902 are replaced, the three positioning holes can sequentially penetrate through the positioning holes and the blind holes 9011 through the positioning pins 11, and the relative fixation of the rotating die 9 and the fixed frame 10 is ensured

Wherein, a plurality of second balls 1004 are matched with the spherical pair on the lower surface of a polygonal plate 901; the second ball 1004 is in contact with the upper surface of the support plate 1002.

A rotating cylinder 904 penetrates between the two polygonal plates 901, the connecting strength between the two polygonal plates 901 can be improved by the rotating cylinder 904, the safety of the rotating die 9 rotating by taking the fixing column 1003 as a rotating center is further improved, and the rotating cylinder 904 is in rotating fit with the fixing column 1003 through a bearing.

the spiral lifter 2 further comprises a worm, a hand wheel 203 is mounted at the end of the worm, or the end of the worm is connected with an output shaft of the servo motor, and the spiral lifter is controlled to work in an electric control mode.

the top end of the screw rod 201 is fixedly provided with a guide plate 14, the end part of the guide plate 14 is provided with a straight notch 1401, and the straight notch 1401 and the top end of the fixed column 1003 form guiding fit; the straight notch 1401 provides a guiding function for the fixing post 1003 on the fixing frame 10 to move close to the step pulley mold 4, and the guide plate 14 can improve the stability of the rotary table 3.

The use method of the pipe bender for machining the pipe fittings for automobile production and manufacturing comprises the following steps:

Step one, a worm of the spiral lifter 2 is rotated through a hand-operated wheel 203 or a servo motor, and a screw rod 201 drives a stepped wheel die 4 to lift; selecting an annular groove 502 matched with the pipe fitting, and enabling the pipe fitting to be tangent to the annular groove 502; because the guide groove 7011 and the guide strip 602 form guide fit, the transmission cylinder 6 is driven by the step column 5 to ascend, and the motor 8 and the support plate 202 ascend and descend along with the ascending and descending, but the spatial positions of the rotating plate 7, the fixed box 12, the rotating die 9 and the fixed frame 10 are not influenced;

step two, because the rotating cylinder 904 between the two polygonal plates 901 is rotatably connected with the fixing column 1003, the rotating die 9 can be rotated on the basis of the fixing frame 10, and the clamping die 902 matched with the pipe fitting and the annular groove 502 is selected, after the clamping die 902 is selected, the clamping die 902 is close to the annular groove 502 and sequentially penetrates through the positioning hole and the blind hole 9011 through the positioning pin 11, so that the rotating die 9 and the fixing frame 10 are relatively fixed;

step three, starting the hydraulic cylinder 13, enabling the support plate 1002 to slide on the fixed box 12, and enabling the clamping die 902 to approach the step wheel die 4 until the clamping die 902 and the annular groove 502 clamp the pipe;

Step four, starting the motor 8, enabling the second gear 801 to be in meshed transmission with the first gear 601, and enabling the transmission cylinder 6 to drive the stair column 5 to rotate by taking the screw rod 201 as a rotation center; because the guide groove 7011 and the guide strip 602 form a guide fit, when the transmission cylinder 6 rotates, the transmission cylinder drives the rotating plate 7, the fixed box 12, the rotating die 9 and the fixed frame 10 to rotate by taking the screw rod 201 as a rotation center, and finally the step wheel die 4 and the rotary table 3 clamp the pipe to rotate by taking the screw rod 201 as the rotation center, so that the pipe is manufactured into a bent pipe.

the invention can effectively improve the replacement efficiency of different annular grooves 502 on the stepped wheel die 4 and the replacement efficiency of the clamping die 902 on the rotating die 9, reduce the labor pressure of people and improve the working efficiency of the pipe bender.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

the preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.