CN213224089U - Welding ring bending machine - Google Patents

Abstract

The utility model discloses a welding ring bending machine, including first drive arrangement, second drive arrangement, first crooked dish, the crooked dish of second and casing. The first bending disc comprises a first mandrel and a first driving lever, the first mandrel is rotatably connected with the shell, the first mandrel is fixedly connected with the first driving lever through a first connecting disc, and the first driving lever is arranged in parallel with the first mandrel. The first driving device is in driving connection with the first mandrel. The second bending disc comprises a second mandrel and a second driving lever, the second mandrel is rotatably connected with the shell, the second mandrel is fixedly connected with the second driving lever through a second connecting disc, and the second driving lever is arranged in parallel with the second mandrel. The second driving device is in driving connection with the second mandrel. The first mandrel and the second mandrel are arranged in parallel and rotate reversely. The bending machine can reduce the influence of human factors on the bending effect, and has small bending angle error. When the welding ring is prepared, the rib plate can be placed between the two bending disks, the movement of the two driving levers cannot be influenced, and the operation is more flexible.

Description

Welding ring bending machine

Technical Field

The utility model relates to a angle bending machine technical field, concretely relates to welding ring bending machine.

Background

With the development of the electrified railway technology, people have higher requirements on the steel bar bender. The welding ring is a common contact net accessory and is usually used for bearing down an anchor device, and the requirements of people on the shape and the preparation efficiency of the welding ring are increasingly improved. The equipment currently used to make welded rings is typically a bar bender. The existing steel bar bender needs to bend and form round steel twice, is inconvenient to operate, has poor forming effect, greatly influences bending effect by human factors in the operation process, and cannot meet actual requirements on bending angle errors. Fig. 1 is a view showing a structure of a conventional solder ring. As shown in figure 1, a rib plate with the thickness of 14mm needs to be sleeved inside some welding rings, and the existing steel bar bender is difficult to add the rib plate in the bending process.

Therefore, how to design an efficient, flexible and reliable welding ring bending machine becomes an important point for technical problems to be solved and research in the whole process by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the utility model provides a welding ring bending machine to solve current angle bending machine and need divide twice with round steel bending, operate inconveniently, the shaping effect is relatively poor, and people's factor influences the great problem of system effect to bending in the operation process.

Therefore, the embodiment of the utility model provides a following technical scheme:

the utility model provides a welding ring bending machine, which comprises a first driving device, a second driving device, a first bending disc, a second bending disc and a shell;

the first bending disc comprises a first mandrel and a first driving lever, the first mandrel is rotatably connected with the shell, the first mandrel is fixedly connected with the first driving lever through a first connecting disc, and the first driving lever is arranged in parallel with the first mandrel;

the first driving device is in driving connection with the first mandrel;

the second bending disc comprises a second mandrel and a second deflector rod, the second mandrel is rotatably connected with the shell, the second mandrel and the second deflector rod are fixedly connected through a second connecting disc, and the second deflector rod and the second mandrel are arranged in parallel;

the second driving device is in driving connection with the second mandrel;

the first mandrel and the second mandrel are arranged in parallel, and the first mandrel and the second mandrel rotate reversely.

Furthermore, the first driving device is a first motor, and an output shaft of the first motor is fixedly connected with the first mandrel;

the second driving device is a second motor, and an output shaft of the second motor is fixedly connected with the second mandrel.

Further, the first driving device is in transmission connection with the first mandrel through a first transmission mechanism;

and the second driving device is in transmission connection with the second mandrel through a second transmission mechanism.

Further, the first driving device is a first hydraulic cylinder, and the first transmission mechanism comprises a first gear, a first rack and a first guide wheel;

a cylinder barrel of the first hydraulic cylinder is fixedly connected with the shell, a piston rod of the first hydraulic cylinder is fixedly connected with the first rack, the first rack is meshed with the first gear, the first guide wheel is rotatably connected with the shell, the first guide wheel is slidably connected with the first rack, and the first gear is in transmission connection with the first spindle;

the second driving device is a second hydraulic cylinder, and the second transmission mechanism comprises a second gear, a second rack and a second guide wheel;

the cylinder barrel of the second hydraulic cylinder is fixedly connected with the shell, the piston rod of the second hydraulic cylinder is fixedly connected with the second rack, the second rack is meshed with the second gear, the second guide wheel is rotatably connected with the shell, the second guide wheel is slidably connected with the second rack, and the second gear is in transmission connection with the second mandrel.

Further, the first driving device and the second driving device are arranged inside the shell;

the first deflector rod and the second deflector rod are arranged outside the shell;

the first spindle extends to the outside of the case through a first connection hole provided in the case surface;

the second mandrel extends to the outside of the shell through a second connecting hole arranged on the surface of the shell.

Further, the first mandrel is rotatably connected with the shell through a first fixed seat, and the first fixed seat is fixedly connected with the shell;

the second mandrel is rotatably connected with the shell through a second fixed seat, and the second fixed seat is fixedly connected with the shell.

Furthermore, a first bearing is arranged on the first fixed seat, an outer ring of the first bearing is fixedly connected with the first fixed seat, and an inner ring of the first bearing is fixedly connected with the first mandrel;

and a second bearing is arranged on the second fixing seat, the outer ring of the second bearing is fixedly connected with the second fixing seat, and the inner ring of the second bearing is fixedly connected with the second mandrel.

Further, the second connecting hole is a strip-shaped through hole along the vertical direction.

Further, the first mandrel and the second mandrel have a set height difference in the vertical direction.

Further, the welding ring bending machine further comprises a base and a control box;

the shell is fixed on the base;

the control box is arranged in the base;

the control box is electrically connected with the first driving device and the second driving device.

The utility model has the advantages that:

(1) the utility model provides a welding ring bending machine can be with welding ring one shot forming through two crooked dish simultaneous workings, and efficiency is higher, and easy operation can reduce the influence of human factor to the system effect of bending, is convenient for establish the floor at the cover before the system of bending.

(2) The utility model discloses connecting hole on the casing is the bar through-hole along vertical direction, and the vertical height-adjustable of crooked dish can be applicable to the curved system demand of different welding rings.

Drawings

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

Fig. 1 is a schematic structural diagram of a conventional solder ring.

Fig. 2 is a schematic structural view of a welding ring bending machine according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a welding ring bending machine (not including a housing) according to an embodiment of the present invention.

Fig. 4 is a front structural schematic diagram of the welding ring bending machine according to the embodiment of the present invention.

Fig. 5 is a schematic structural view of a welding ring bending machine according to another embodiment of the present invention.

A solder ring, 1; a rib plate, 2;

a first hydraulic cylinder, 111; a first rack, 112; a first guide wheel, 113; a first cylinder bolt, 114; a first rotating shaft, 115;

a second hydraulic cylinder 121; a second rack, 122; a second guide wheel, 123; a second cylinder bolt, 124; a second shaft, 125;

a first curved disc, 21; a first mandrel, 211; a first gear 212; a first lever, 213; a first land, 214;

a second curved disc, 22; a second mandrel 221; a second gear, 222; a second shift lever 223; a second land, 224;

a first fixed seat 31; a first bolt, 311;

a second fixed seat 32; a second bolt, 321;

a housing, 41; a second connection hole, 412;

a base 51.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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 application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

As shown in fig. 2, the present embodiment specifically discloses a welding ring bending machine for bending a target round steel, which includes a first driving device, a second driving device, a first bending disk 21, a second bending disk 22, and a housing 41.

The first bending disk 21 includes a first core shaft 211 and a first shift lever 213, the first core shaft 211 is rotatably connected to the housing 41, in this embodiment, the first core shaft 211 is optionally connected to the housing 41 through a bearing, an outer ring of the bearing is fixedly connected to the housing 41, and an inner ring of the bearing is fixedly connected to the first core shaft 211. The first mandrel 211 and the first lever 213 are fixedly connected through a first connecting plate 214, and the first lever 213 is arranged parallel to the first mandrel 211. In this embodiment, the one end of first flange 214 is provided with the mounting hole, and the other end is provided with the recess, and first flange 214 passes through the mounting hole to be fixed at the middle part of first mandrel 211, and the one end of first mandrel 211 is greater than the diameter of target round steel with the distance of mounting hole. A portion between one end of the first mandrel 211 and the mounting hole is used to support the target round steel. The first driving lever 213 is inserted into the groove, and the length of the first driving lever 213 extending out of the groove is greater than the diameter of the target round steel. The first driver 213 bends the target round steel. The first lever 213 is on the same side of the first connecting plate 214 as the portion of the first mandrel 211 for supporting the target round steel.

The first driving device is in driving connection with the first mandrel 211, the first driving device drives the first mandrel 211 to rotate, and the first mandrel 211 rotates to drive the first shift lever 213 to rotate around the first mandrel 211 by taking the first mandrel 211 as a circle center, so that round steel of the first mandrel 211 and the first shift lever 213 is bent.

The second bending disk 22 includes a second spindle 221 and a second shift lever 223, and the second spindle 221 is rotatably connected to the housing 41. In this embodiment, the second mandrel 221 may be connected to the housing 41 through a bearing, an outer ring of the bearing is fixedly connected to the housing 41, and an inner ring of the bearing is fixedly connected to the second mandrel 221. The second spindle 221 and the second lever 223 are fixedly connected through a second connecting plate 224, and the second lever 223 is arranged parallel to the second spindle 221. In this embodiment, one end of the second connecting disc 224 is provided with a mounting hole, the other end of the second connecting disc 224 is provided with a groove, the second connecting disc 224 is fixed in the middle of the second mandrel 221 through the mounting hole, and the distance between one end of the second mandrel 221 and the mounting hole is greater than the diameter of the target round steel. The portion between one end of the second mandrel 221 and the mounting hole is used to support the target round steel. The second driver 223 is inserted into the recess, and the length of the second driver 223 extending out of the recess is greater than the diameter of the target round steel. The second driver 223 is used to bend the target round steel. The second lever 223 is on the same side of the second connecting plate 224 as the portion of the second mandrel 221 for supporting the target round steel.

The second driving device is in driving connection with the second spindle 221.

The first spindle 211 is parallel to the second spindle 221, and the first spindle 211 and the second spindle 221 rotate in opposite directions.

In this embodiment, the first mandrel 211 and the second mandrel 221 simultaneously support the target round steel, and the round steel is placed between the first mandrel 211 and the first shift lever and between the second mandrel and the second shift lever. When welding the weld ring 1 shown in fig. 1, the rib 2 can be fitted around the target round steel according to actual needs, and the rib 2 can be hung between the first mandrel 211 and the second mandrel 221. During molding, the first deflector rod 213 and the second deflector rod 223 bend the two ends of the target round steel respectively, so that the target round steel can be molded at one time, the efficiency is high, and the bending angle is accurate.

In a specific embodiment, the first driving device is a first motor, and an output shaft of the first motor is fixedly connected to the first mandrel 211. The second driving device is a second motor, and an output shaft of the second motor is fixedly connected with the second spindle 221. In this embodiment, the output shaft of motor passes through the shaft coupling and is connected with the dabber, coaxial rotation, and power transmission is steady, and the loss is little.

In a specific embodiment, as shown in fig. 3, the first driving device is in driving connection with the first mandrel 211 through a first transmission mechanism. The first driving device is a first hydraulic cylinder, and a cylinder tube of the first hydraulic cylinder 111 is fixedly connected with the housing 41. In the present embodiment, the bottom of the first hydraulic cylinder 111 is fixedly connected to the housing 41 by the first hydraulic cylinder bolt 114. The piston rod of the first hydraulic cylinder 111 is fixedly connected with the first rack 112, the first rack 112 is engaged with the first gear 212, and the first guide wheel 113 is rotatably connected with the housing 41. In this embodiment, the first guide wheel 113 is optionally fixedly connected to the first rotating shaft 115, and the first rotating shaft 115 is rotatably connected to the housing 41. The first guide wheel 113 is slidably connected to the first rack 112, and the first gear 212 is fixedly connected to the first spindle 211. In this embodiment, the first hydraulic cylinder 111 is preferably controlled by a solenoid valve to move the first rack 112 up or down according to a set stroke. The first guide wheel 113 is used for limiting the first rack 112 to move in the vertical direction, and the first rack 112 moves up or down to drive the first gear to rotate, so that the first spindle rotates.

The second driving device is in transmission connection with the second mandrel through a second transmission mechanism. The second driving device is a second hydraulic cylinder 121, and the second transmission mechanism includes a second gear 222, a second rack 122 and a second guide wheel 123.

The cylinder tube of the second hydraulic cylinder 121 is fixedly connected to the housing 41, and the piston rod of the second hydraulic cylinder 121 is fixedly connected to the second rack 122. In this embodiment, the bottom of the second hydraulic cylinder 121 is fixedly connected to the housing 41 by a second hydraulic cylinder bolt 124. The second rack 122 is engaged with the second gear 222, and the second guide wheel 123 is rotatably connected to the housing 41. In this embodiment, the second guide wheel 123 may be selectively and fixedly connected to the second rotating shaft 125, and the second rotating shaft 125 is rotatably connected to the housing 41. The second guide wheel 123 is slidably connected to the second rack 122, and the second gear 222 is drivingly connected to the second spindle 221. In this embodiment, the second hydraulic cylinder 121 is preferably controlled by a solenoid valve, and drives the second rack 122 to move up or down according to a set stroke. The second guide wheel 123 serves to restrict the second rack 122 from moving in the vertical direction.

Compared with the prior art, this embodiment passes through the lateral displacement of leading wheel restriction rack, can improve rack removal process's stability, improves the precision of buckling.

In a particular embodiment, as shown in fig. 4, the first and second drive means are disposed inside a housing 41. The first and second levers 213 and 223 are disposed outside the housing 41. The first spindle 211 extends to the outside of the case 41 through a first connection hole (not shown in the drawing) provided in a surface of the case 41. The second stem 221 extends to the outside of the case 41 through a second connection hole 412 provided in the surface of the case 41. In this embodiment, the first driving device and the second driving device are disposed inside the housing 41, so as to avoid injuring the user, improve the safety, and avoid the influence of the foreign object on the service life. The first mandrel 211 and the second mandrel 221 extend outside the housing 41 to facilitate placement of the target round steel.

In a specific embodiment, the first mandrel 211 is rotatably connected to the housing 41 through the first fixing seat 31, and the first fixing seat 31 is fixedly connected to the housing 41. In this embodiment, the first fixing seat 31 may be square, rectangular or circular. The first fixing seat 31 is provided with a first bearing, an outer ring of the first bearing is fixedly connected with the first fixing seat, and an inner ring of the first bearing is fixedly connected with the first mandrel 211. The first fixing holder 31 is connected to the housing 41 by a first bolt 311 passing through the first bolt hole. The second shaft 221 is rotatably connected to the housing 41 through the second fixing seat 32, and the second fixing seat 32 is fixedly connected to the housing 41. In this embodiment, the second fixing seat 32 can be square, rectangular or circular. A second bearing is arranged on the second fixing seat 32, an outer ring of the second bearing is fixedly connected with the second fixing seat, and an inner ring of the second bearing is fixedly connected with the second mandrel 221. The second fixing base 32 is connected to the housing 41 by a second bolt 321 passing through the second bolt hole. Compared with the prior art, this embodiment is fixed the dabber on casing 41 through the fixing base, can improve the stability of driving lever rotation process, improves the precision of buckling.

In a specific embodiment, the second connection hole 412 is a bar-shaped through hole in a vertical direction. In this embodiment, the length of the strip-shaped through hole is greater than the diameter of the second mandrel 221. The vertical height of the second fixing base 32 is adjustable. The height difference of the first mandrel 211 and the second mandrel 221 in the vertical direction is adjusted by adjusting the vertical height of the second fixing seat 32, so that the bending requirements of different welding rings 1 can be met. The first mandrel 211 and the second mandrel 221 have a set height difference in the vertical direction. The vertical height difference between the first fixed seat 31 and the second fixed seat 32 is preferably any one of the following: 100mm, 120mm and 150 mm.

In a particular embodiment, the weld ring bending machine further includes a base and a control box. The housing 41 is fixed to the base. The control box is arranged in the base. The control box is electrically connected with the first driving device and the second driving device, and the control box controls the starting and stopping of the first driving device and the second driving device. In this embodiment, through setting up the control box at the base, simple structure, rationally distributed, the operation is more convenient.

As shown in fig. 5, in a particular embodiment, the first and second hydraulic cylinders 111 and 121 are located below the first and second flexure discs 21 and 22. The lower portion of the case 41 is located within the frame of the base 51. The first and second hydraulic cylinders 111 and 121 are located at a lower portion of the case 41, and the first and second bending disks 21 and 22 are located at an upper portion of the case 41. In this embodiment, the lower portion of the box 41 is located in the frame of the base 51, so that the structure is more stable.

In use, the first lever 213 is located directly above the first spindle 211, and the second lever 223 is located directly above the second spindle 221. The target round steel is supported on the first and second mandrels 211 and 221, and the first and second levers 213 and 223 are located above the target round steel. The first hydraulic cylinder 111 and the second hydraulic cylinder 121 simultaneously push the first rack 112 and the second rack 122 to move down. The first rack 112 drives the first gear 212 to rotate counterclockwise, and the first spindle 211 rotates counterclockwise along with the first gear 212. The second rack 122 drives the first gear 212 to rotate clockwise, and the second spindle 221 rotates clockwise with the second gear 222. The first lever 213 rotates clockwise along with the first spindle 211. The second shift lever 223 rotates clockwise with the second spindle 221. The first and second levers 213 and 223 simultaneously bend both ends of the target round steel downward, and the target round steel is bent in an inverted U shape. When the second hydraulic cylinder stops working, the first hydraulic cylinder continues to push the first rack 112 to move downwards to drive the first shifting lever 213 to continue to rotate anticlockwise, one end of the target round steel is bent by 180 degrees, and the first hydraulic cylinder drives the first rack 112 to move upwards to drive the first shifting lever 213 to recover the original position. The second hydraulic cylinder pushes the second rack 122 to move down, drives the second shift lever 223 to bend the other end of the target round steel by 180 degrees, and the second hydraulic cylinder drives the second rack 122 to move up, drives the second shift lever 223 to return to the original position, thereby completing the bending of the welding ring 1.

The existing steel bar bender needs to manually adjust the round steel after finishing the first bending and then carries out the second bending, and has complex operation and low efficiency. The angle of twice bending depends on manual adjustment, the error is large, and the actual requirement cannot be met. The insertion of the ribs 2 affects the smoothness of the bending process. Compared with the prior art, the utility model discloses a two crooked dish simultaneous workings can be with 1 one-time bending of weld ring shaping, and efficiency is higher. The existing steel bar bender has high requirement on manual operation. The utility model is simple in operation, can reduce the influence of human factor to curved system effect, the bending angle error at round steel both ends is little. When preparing the round steel that is equipped with floor 2, can place floor 2 in the middle of two crooked dishes, can not influence the motion of two driving levers, the operation is more nimble.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims (10)

1. A machine for bending welded rings, characterized by comprising a first drive means, a second drive means, a first bending disk (21), a second bending disk (22) and a housing (41);

the first bending disc (21) comprises a first mandrel (211) and a first driving lever (213), the first mandrel (211) is rotatably connected with the shell (41), the first mandrel (211) and the first driving lever (213) are fixedly connected through a first connecting disc (214), and the first driving lever (213) and the first mandrel (211) are arranged in parallel;

the first driving device is in driving connection with the first mandrel (211);

the second bending disc (22) comprises a second mandrel (221) and a second driving lever (223), the second mandrel (221) is rotatably connected with the shell (41), the second mandrel (221) and the second driving lever (223) are fixedly connected through a second connecting disc (224), and the second driving lever (223) and the second mandrel (221) are arranged in parallel;

the second driving device is in driving connection with the second mandrel (221);

the first mandrel (211) and the second mandrel (221) are arranged in parallel, and the first mandrel (211) and the second mandrel (221) rotate reversely.

2. The machine according to claim 1, characterized in that said first driving means is a first electric motor, the output shaft of which is fixedly connected to said first mandrel (211);

the second driving device is a second motor, and an output shaft of the second motor is fixedly connected with the second mandrel (221).

3. The machine according to claim 1, characterized in that said first driving means are in transmission connection with said first mandrel (211) through a first transmission;

the second driving device is in transmission connection with the second mandrel (221) through a second transmission mechanism.

4. The weld ring bending machine according to claim 3, wherein the first driving device is a first hydraulic cylinder (111), the first transmission comprising a first gear (212), a first rack (112) and a first guide wheel (113);

the cylinder barrel of the first hydraulic cylinder (111) is fixedly connected with the shell (41), the piston rod of the first hydraulic cylinder (111) is fixedly connected with the first rack (112), the first rack (112) is meshed with the first gear (212), the first guide wheel (113) is rotatably connected with the shell (41), the first guide wheel (113) is slidably connected with the first rack (112), and the first gear (212) is fixedly connected with the first mandrel (211);

the second driving device is a second hydraulic cylinder (121), and the second transmission mechanism comprises a second gear (222), a second rack (122) and a second guide wheel (123);

the cylinder barrel of the second hydraulic cylinder (121) is fixedly connected with the shell (41), the piston rod of the second hydraulic cylinder (121) is fixedly connected with the second rack (122), the second rack (122) is meshed with the second gear (222), the second guide wheel (123) is rotatably connected with the shell (41), the second guide wheel (123) is slidably connected with the second rack (122), and the second gear (222) is fixedly connected with the second mandrel (221).

5. The machine according to claim 1, characterized in that said first and second driving means are arranged inside said casing (41);

the first shift lever (213) and the second shift lever (223) are disposed outside the housing (41);

the first mandrel (211) extends to the outside of the shell (41) through a first connecting hole arranged on the surface of the shell (41);

the second spindle (221) extends to the outside of the housing (41) through a second connection hole (412) provided in the surface of the housing (41).

6. The machine according to claim 5, characterized in that said first mandrel (211) is rotatably connected to said housing (41) by means of a first fixed seat (31), said first fixed seat (31) being fixedly connected to said housing (41);

the second mandrel (221) is rotatably connected with the shell (41) through a second fixed seat (32), and the second fixed seat (32) is fixedly connected with the shell (41).

7. The machine according to claim 6, characterized in that said first fixed seat (31) is provided with a first bearing, the outer ring of which is fixedly connected to said first fixed seat and the inner ring of which is fixedly connected to said first mandrel (211);

and a second bearing is arranged on the second fixing seat (32), the outer ring of the second bearing is fixedly connected with the second fixing seat, and the inner ring of the second bearing is fixedly connected with the second mandrel (221).

8. The welding ring bending machine according to claim 5, characterized in that said second connection holes (412) are bar-shaped through holes in vertical direction.

9. The machine according to claim 1, characterized in that the first mandrel (211) and the second mandrel (221) have a set height difference in the vertical direction.

10. The weld ring bending machine according to claim 1, further comprising a base and a control box;

the shell (41) is fixed on the base;

the control box is arranged in the base;

the control box is electrically connected with the first driving device and the second driving device.

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