CN218460521U

CN218460521U - Spring bending machine

Info

Publication number: CN218460521U
Application number: CN202220297076.5U
Authority: CN
Inventors: 余霆; 马兴发; 赵欢; 肖卫波
Original assignee: Zhejiang Mengshen Home Co ltd
Current assignee: Zhejiang Mengshen Home Co ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2023-02-10
Anticipated expiration: 2032-02-14

Abstract

The application discloses a spring bending machine which comprises two bending assemblies and two power devices respectively connected with the two bending assemblies; the assembly of bending including installing the curved subassembly of clamp on the carousel, press from both sides curved subassembly and be provided with the mounting groove that supplies straight spring part to pass, power device work drives the carousel and rotates around its center pin, the rotatory straight spring part that will pass the mounting groove of carousel is bent. Two bending assemblies are arranged, and the two ends of the straight spring part can be bent at the same time. The setting presss from both sides curved subassembly and installs in the carousel, and the carousel is rotatory to drive presss from both sides curved subassembly rotatory to the straight spring part of drive is rotatory.

Description

Spring bending machine

Technical Field

The application relates to the field of bending machines, in particular to a spring bending machine.

Background

A bending machine is a machine capable of bending a plate or a tube. Common bending machine, like chinese patent application "a high accuracy spiral bevel gear transmission elbow structure", application number: CN202021909889.2; the bending machine comprises a base, wherein an empty groove is formed in a workbench above the base, a fixing column is arranged at the upper end of the workbench, a bending wheel disc used for bending a pipe is arranged on the fixing column, a pipe bending main shaft is rotatably connected with the fixing column, a pipe bending arm is arranged above the workbench, the upper end of the pipe bending arm is fixedly connected with the upper end of the pipe bending main shaft, and the lower end of the pipe bending arm is rotatably connected with the fixing column. The splint will treat that the one end centre gripping of processing tubular product is fixed, and the return bend arm rotation acts on the other end of treating processing tubular product for the other end of treating processing tubular product is buckled along the radian of rim plate. The pipe bender can only bend one end of the pipe.

The Chinese patent application 'traction drive type double-elbow multifunctional pipe bender', application number: cn201320000084.X; discloses a speed reducing motor arranged at the lower part of a frame, a main shaft and an auxiliary shaft are movably arranged at the upper part of the frame through a bearing, a speed reducing wheel is arranged on the main shaft, a curling wheel is arranged on the speed reducing motor, a speed reducing wheel steel wire rope is arranged between the speed reducing wheel and the curling wheel, a driving traction wheel is simultaneously arranged on the main shaft, a driven traction wheel is arranged on the auxiliary shaft, a traction wheel steel wire rope is arranged between the driving traction wheel and the driven traction wheel, the other end of the speed reducing wheel corresponding to the speed reducing wheel steel wire rope is provided with a speed reducing wheel reverse return extension spring, or a main shaft reverse torsion spring is arranged on the main shaft, a driven traction wheel reverse return extension spring is arranged on the driven traction wheel, or an auxiliary shaft reverse torsion spring is arranged on the spoke shaft, one end of the main shaft is provided with a driving bending die and a driving bending pipe arm, and one end of the auxiliary shaft is provided with a driven bending die and a driven bending pipe arm. The straight pipe is put into the driving pipe bending die and the driven pipe bending die, the speed reducing motor is started, the speed reducing wheel and the driving pipe bending arm rotate with larger torque, and meanwhile, the driven pipe bending arm is driven to rotate in opposite directions, and one-step forming of the double elbows is completed.

The bending machine has the following problems no matter single-head or multi-head bending: set up the rim plate for tubular product can buckle along the surface radian of rim plate. The elbow arm with the roller structure is arranged to act on the surface of the pipe. After the bending machine is formed, the bending angle of the bending machine is determined and cannot be adjusted. The length of the straight line segment of the middle section of the double-elbow bending machine is also fixed. Can only be bent for one product and has no universality.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a spring bending machine, which is provided with two bending assemblies, and can bend two ends of a straight spring part at the same time; the arrangement of the clamping and bending assembly is arranged on the rotary table, and the rotary table drives the clamping and bending assembly to rotate, so that the straight spring part is driven to rotate.

The technical scheme adopted by the application is as follows: a spring bending machine comprises two bending assemblies and two power devices respectively connected with the two bending assemblies; the bending assembly comprises a clamping and bending assembly arranged on the rotary table, the clamping and bending assembly is provided with an installation groove for the straight spring part to pass through, the power device works to drive the rotary table to rotate around a central shaft of the rotary table, and the rotary table rotates to bend the straight spring part passing through the installation groove;

the controller is connected with the two power devices and controls the power devices to work; the power device comprises a servo motor, and the controller controls the servo motor to rotate forwards, reversely or stop;

the clamping and bending assembly comprises a first base block and a second base block, and a distance exists between the first base block and the second base block and forms the mounting groove; the second base block is movable on the turntable, and the movable second base block adjusts the distance from the first base block. I.e. the width of the mounting groove is adjusted. And then can adapt to the bending of the straight spring part of different sizes.

Compared with the prior art, the advantage of this application lies in will pressing from both sides curved subassembly and install on the carousel, and the rotation through the carousel drives whole curved subassembly rotation that presss from both sides. The power of the straight spring part of bending of this application is provided by the carousel is rotatory around its center pin. Thirdly, this application presss from both sides curved subassembly and is provided with the mounting groove, provides the installation space that straight spring part passed, presss from both sides curved subassembly and revolutes a set center pin rotation, has realized bending of straight spring part. In this application, the bent pipe arm of the bending wheel disc and the roller structure of the bending base arranged on the existing bending machine is cancelled. The production cost of the application is greatly reduced, and the method has good economic benefit. The power device comprises a servo motor, and the controller controls the servo motor to rotate forwards, reversely or stop so as to control the rotating angle of the turntable and further control the bending angle of the straight spring piece. The second base block can move on the turntable, the distance between the second base block and the first base block is adjusted by the moving second base block, namely, the width of the mounting groove is adjusted, and the second base block can be further suitable for bending of straight spring pieces with different sizes.

In some embodiments of the present application, a contact sensor is disposed at the second end, the contact sensor is connected to the controller, and the controller controls the servo motor to stop working when the contact sensor is triggered.

This application sets up servo motor reversal, sets up the contact inductor, and the shaped spring after the shaping of once conveniently bending takes out from this application. If the reverse process is not matched with the contact sensor to trigger the command, the special-shaped spring is in a state of being pressed by the second base block and is inconvenient to take down. And the second contact sensor gives feedback to the controller, so that the controller can judge the bending angle of the straight spring part according to the rotation angle of the stopped servo motor.

In some embodiments of the present application, the servo motor is connected to a first gear, the turntable is connected to a second gear, the second gear is coaxial with the turntable, and the first gear is engaged with the second gear. The servo motor rotates to drive the turntable to rotate, and the servo motor is used as a power driving piece, so that the rotary precision is high, and the bending machine is suitable for machining with high bending precision requirements.

In some embodiments of the present application, the servo motor is connected to a speed reducer, and the speed reducer is connected to the first gear.

In some embodiments of the present application, the second gear is a sector gear, the second gear is a semi-circle and includes a side plane, the two second gears are oppositely disposed, the side planes of the two second gears are disposed in parallel, and the side plane is located at a position close to each other of the two second gears.

When the two bending assemblies work simultaneously, the rotating directions of the two second gears are opposite and synchronous, so that the plane sides of the two second gears are always kept parallel. Therefore, the two bending assemblies are close to each other, and the rotation of the two second gears does not influence each other.

Another idea of the application is that a pipe bending arm of a roller structure and a bending wheel disc serving as a bending base are eliminated in the bending assembly, and two base blocks are used as the bending base and the bending arm, so that the cost of the bending machine is greatly reduced, and the bending precision is improved.

In some embodiments of the present application, the height of the mounting groove is greater than the diameter of the straight spring member. Make straight spring part can hold in the mounting groove promptly, avoid straight spring part at the in-process atress inhomogeneous of bending, and cause the precision of bending to hang down.

The height of the mounting groove is larger than or equal to a plurality of times of the diameter of the straight spring piece. Preferably, the height of the mounting groove is equal to four times of the diameter of the straight spring part. I.e. so that a plurality of preferably four straight spring elements can be accommodated in the mounting groove. This application can accomplish four linear spring's bending simultaneously, improves work efficiency by a wide margin.

In some embodiments of the present application, the width of the mounting groove is greater than the diameter of the straight spring member, and the width of the mounting groove is less than twice the diameter of the straight spring member. That is, the two springs can only be placed on top of each other, but not on the same horizontal plane.

Preferably, said distance is greater than a predetermined value of the diameter of the straight spring element. Promptly, at first make the interval that passes that straight spring part can be smooth, secondly, first base block, second base block can act on straight spring part again, avoid straight spring part activity to cause and skid. And the height of the mounting groove is matched, so that the plurality of straight spring parts placed in the mounting groove are arranged up and down, and the bending precision of the plurality of straight spring parts is ensured.

In some embodiments of the present application, the first base block includes a first end and a second end, the first end is in contact with the straight spring member, the first end is provided with a contact surface, and the contact surface is a curved surface and is in contact with the straight spring member.

In the application, the first end of the first base block is a base plane for bending the linear spring, and the linear spring is bent by taking a curved surface of the first end as a reference plane in the bending process.

In some embodiments of the present application, the central axis of the disk is tangential to the contact surface. And the line of the contact surface on which the central shaft is located is the base point of the contact of the straight spring element and the contact surface. Namely, during the whole rotation process of the clamping and bending assembly, the contact surface rotates around one tangent line, the position of a base point of the straight spring piece contacted with the contact surface is always constant, and the straight spring is stable during the bending process.

In some embodiments of the present application, the second end is located at an end of the first base block adjacent to the straight spring member. I.e. the second end is located in the first base piece near the curved section of the profile spring.

In some embodiments of the present application, the first end and the second end are connected by a connection surface, and the connection surface is provided with a recess. In this application, set up the sunk structure and do and keep away the empty processing, avoid having the touching in the face department of connecting at the straight spring part in-process of bending, and then the precision that the straight spring of influence was bent.

In some embodiments of the present application, a side of the second base block is a surface for applying force to the spring element, and the surface is curved. In the process of bending the straight spring part, the action surface formed by the curved surface can well act on the straight spring part. The action surface is a smooth curved surface; the contact produces friction between action face and the straight spring part promptly for sliding friction, and frictional force is less for the action face can smoothly slide along the curved surface of straight spring part.

In some embodiments of the present application, a resting plate is disposed on the periphery of the turntable, and the top surface of the resting plate and the top surface of the turntable are located on the same horizontal plane. Namely, the two ends of the straight spring part placed in the mounting groove are also placed on the placing plate, and the design is to realize that the straight spring part is positioned on a horizontal plane.

Another idea of this application lies in, sets up slide rail set spare and is used for the installation subassembly of bending for the interval between two subassemblies of bending is adjustable, thereby adapts to the shaping of bending of the straight spring part of different length.

In some embodiments of the present application, the present application includes a frame having a rail mounted thereon; one bending assembly is fixed on the frame; and the other bending assembly is arranged on the sliding rail and can move along the sliding rail, so that the distance between the two bending assemblies is changed.

In some embodiments of the present application, the rack is marked with a scale indicating a distance between the mounting grooves of the two bending assemblies. I.e. the length of the middle straight section when bending the straight spring element. An operator can conveniently adjust the position of one of the bending assemblies according to the scale marks, and the bending requirement is met.

In some embodiments of the present application, the frame is provided with a movable stopper, and the stopper is located between the same bar as the two turntables. The dog be used for carrying on spacingly to the straight spring part, the one end top of straight spring part is on the dog, avoids straight spring part to remove.

Drawings

The present application will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on the concept of a composition or construction of the object being described and may include exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a top view of the present application;

FIG. 2 is a schematic structural diagram of the present application;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is an enlarged fragmentary view of a portion of the dial of FIG. 3;

fig. 5 is a schematic view of the internal structure of the present application.

Wherein the reference numerals are specified as follows: 1. a slide rail; 2. a turntable; 3. mounting grooves; 4. a first base block; 41. a first end; 41a, a contact surface; 42. a second end; 43. a connecting surface; 5. a second base block; 5a, an action surface; 6. a shelf board; 7. a frame; 8. a stopper; 9. a servo motor; 10. a controller; 11. a first gear; 12. a second gear; 12a, planar side.

Detailed Description

The present application will now be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

A spring bending machine, an embodiment of which is shown in fig. 1 to 5: comprises two bending components and two power devices respectively connected with the two bending components; the bending assembly comprises a clamping bending assembly arranged on the turntable 2, the clamping bending assembly is arranged on the turntable 2, and the whole clamping bending assembly is driven to rotate through the rotation of the turntable 2. The power of the bent straight spring piece is provided by the rotation of the turntable 2 around the central axis of the turntable. Press from both sides curved subassembly and be provided with the mounting groove 3 that supplies straight spring part to pass, power device work drives carousel 2 and rotates around its central axis, and carousel 2 is rotatory then will pass the straight spring part of mounting groove 3 and bend. The installation space that straight spring part passed is provided, presss from both sides curved subassembly and rotates around 2 center pins of carousel, has realized bending of straight spring part.

In this application, the bent pipe arm of the bending wheel disc and the roller structure of the bending base arranged on the existing bending machine is cancelled. The production cost of the application is greatly reduced, and the method has good economic benefit.

In the second embodiment, as shown in fig. 5, the present application further includes a controller 10, where the controller 10 is connected to two power devices, and the controller 10 controls the power devices to operate; the power device comprises a servo motor 9, and a controller 10 controls the servo motor 9 to rotate forwards, backwards or stop. And then the angle that carousel 2 rotated, and then the angle that the control straight spring part was bent.

And a contact sensor is arranged at the second end 42 and is connected with the controller 10, and the controller 10 controls the servo motor 9 to stop working when the contact sensor is triggered.

The servo motor 9 works to rotate forwards to drive the turntable 2 to rotate forwards to bend the straight spring. When the turntable 2 rotates to a preset angle, the servo motor 9 works in a reverse direction to drive the turntable 2 to overturn, the second end 42 is contacted with the special-shaped spring when the first base block 4 rotates in a reverse direction, the contact sensor triggers, the servo motor 9 stops working, and the turntable 2 stops working. Straight spring part at this moment has accomplished to bend, processes to the special-shaped spring, and operating personnel can follow in this application and take off the special-shaped spring. At the moment, the bending angle of the special-shaped spring is the rotating angle of the turntable 2 in the whole process, namely the angle of the forward rotation minus the angle of the reverse rotation of the turntable 2. The control device can accurately obtain the bending angle of the special-shaped spring according to the rotating angle of the servo motor 9.

This application sets up servo motor 9 reversal, sets up the contact inductor, and the shaped spring after the shaping of once conveniently bending takes out from this application. If the reverse process is not matched with the contact sensor triggering command, the special-shaped spring is in a state of being pressed by the second base block 5, and is inconvenient to take down. The second contact sensor gives feedback to the controller 10, so that the controller 10 can judge the bending angle of the straight spring part according to the rotation angle of the stopped servo motor 9.

The servo motor 9 is connected with a first gear 11, the rotary table 2 is connected with a second gear 12, the second gear 12 is coaxial with the rotary table 2, and the first gear 11 is meshed with the second gear 12. Servo motor 9 rotates and drives carousel 2 rotatory, and adopts servo motor 9 as power driving piece, and its rotation accuracy is higher, is fit for the processing that the precision requirement is high of bending.

The servo motor 9 is connected with a speed reducer, and the speed reducer is connected with a first gear 11. The second gear 12 is a sector gear, the second gear 12 is a semicircular gear and includes a side plane, the two second gears 12 are oppositely arranged, the side planes of the two second gears 12 are arranged in parallel, and the side planes are located at the side close to each other of the two second gears 12.

When the two bending assemblies work simultaneously, the rotation directions of the two second gears 12 are opposite and synchronous, so that the plane sides 12a of the two second gears 12 are always kept parallel. And therefore how the two bending assemblies approach each other, the two second gears 12 rotate without interfering with each other.

The other contents of the second embodiment are the same as those of the first embodiment.

In a third embodiment, as shown in fig. 1 to 4, the clinch assembly includes a first base block 4 and a second base block 5, and a space exists between the first base block 4 and the second base block 5, and the space constitutes the mounting groove 3.

The height of the mounting groove 3 is larger than the diameter of the straight spring piece. Make straight spring part can hold in mounting groove 3 promptly, avoid straight spring part at the in-process atress inhomogeneous of bending, and cause the precision of bending to hang down. The height of the mounting groove 3 is more than or equal to a plurality of times of the diameter of the straight spring piece. Preferably, the height of the mounting groove 3 is equal to four times the diameter of the straight spring element. I.e. so that a plurality of preferably four straight spring elements can be accommodated in the mounting groove 3. This application can accomplish four linear spring's bending simultaneously, improves work efficiency by a wide margin.

The width of the mounting groove 3 is larger than the diameter of the straight spring part, and the width of the mounting groove 3 is smaller than twice the diameter of the straight spring. That is, the two springs can only be placed on top of each other, but not on the same horizontal plane. Preferably, said distance is greater than a predetermined value for the diameter of the straight spring element. Namely, firstly make the interval of passing that straight spring part can be smooth, secondly, first base block 4, second base block 5 can act on straight spring part again, avoid the activity of straight spring part to cause and skid. And the height of the mounting groove 3 is matched, so that the plurality of straight spring parts placed in the mounting groove 3 are arranged up and down, and the bending precision of the plurality of straight spring parts is ensured.

The first base block 4 comprises a first end 41 and a second end 42, the first end 41 is in contact with a straight spring member, the first end 41 is provided with a contact surface 41a, and the contact surface 41a is a curved surface and is in contact with the straight spring member. In the present application, the first end 41 of the first base block 4 is a base surface for bending the linear spring, and the linear spring is bent with the curved surface of the first end 41 as a reference surface during the bending process.

The central axis of the rotating disc 2 is tangent to the contact surface 41 a. And the line of the contact surface 41a where the central axis is located is a base point where the straight spring member contacts the contact surface 41 a. Namely, the contact surface 41a rotates around one of the tangent lines during the whole rotation process of the clamping and bending assembly, the position of the base point of the straight spring piece contacted with the contact surface 41a is always constant, and the straight spring is stable during the bending process.

Said second end 42 is located at the end of the first base block 4 close to the straight spring element. I.e. the second end 42 is located at the first base block 4 near the curved section of the wire spring.

The first end 41 and the second end 42 are connected by a connecting surface 43, and a recess is arranged on the connecting surface 43. In this application, set up sunk structure and do and keep away empty processing, avoid having the touching in the in-process of bending of straight spring part connecting face 43 department, and then the precision that the straight spring of influence was bent.

In the present application, the bending wheel serving as the bending base is eliminated, and the curved surface of the first end 41 of the first base block 4 is used as the base surface for bending. The production cost of the application is greatly reduced, the difficulty of production and processing is reduced, and the material cost is saved. Moreover, because the contact surface 41a is rotated during the bending process, the straight spring element can be bent at a large angle even though the contact surface 41a is a curved surface.

In addition, in the production and processing process, compared with the process of forming a small-diameter wheel disc, the first end 41 of the first base is formed into a curved surface with a smaller diameter, and the processing difficulty is smaller.

The other contents of the third embodiment are the same as those of the first embodiment or the second embodiment.

In a fourth embodiment, as shown in fig. 3 and 4, one side surface of the second base block 5 is an acting surface 5a for applying force to the spring element, and the acting surface 5a is a curved surface. In the bending process of the straight spring part, the action surface 5a formed by the curved surface can well act on the straight spring part. The action surface 5a is a smooth curved surface; that is, the friction generated by the contact between the acting surface 5a and the straight spring member is sliding friction, and the friction force is small, so that the acting surface 5a can smoothly slide along the curved surface of the straight spring member.

In the present application, the pipe bending arm of the roller structure is eliminated, and the second base block 5 with the acting surface 5a is used as a force application part for bending. The roller structure comprises a rotating shaft and a roller member, so that the roller member is prevented from moving up and down and shaking in the rotating process around the rotating shaft, the precision requirement of the roller is high, and the bending precision is not influenced. The application adopts a smooth curved surface, and the mounting groove 3 does not clamp the straight spring part, so that the acting surface 5a is provided with a space moving along the surface of the straight spring part. This application reduces the cost of bender by a wide margin to and improve the precision of bending.

The second base block 5 is movable on the turntable 2, the second base block 5 being moved to adjust the distance from the first base block 4. I.e. the width of the mounting groove 3 is adjusted. And then can adapt to the bending of the straight spring part of different sizes.

The periphery of the turntable 2 is provided with a placing plate 6, and the top surface of the placing plate 6 and the top surface of the turntable 2 are positioned on the same horizontal plane. I.e. the two ends of the straight spring element placed in the mounting groove 3, are also placed on the resting plate 6, which is designed in order to achieve that the straight spring element is located on a horizontal plane.

The rest of the fourth embodiment is the same as any of the above embodiments.

In the fifth embodiment, as shown in fig. 1 and 3, the present application includes a frame 7, and a guide rail is installed on the frame 7; one of the bending assemblies is fixed on the frame 7; the other bending component is arranged on the sliding rail 1 and can move along the sliding rail 1, so that the distance between the two bending components is changed.

The frame 7 on the sign have the scale, the scale shows the distance between the mounting groove 3 of two subassemblies of bending. I.e. the length of the middle straight section when bending the straight spring element. An operator can conveniently adjust the position of one of the bending assemblies according to the scale marks, and the bending requirement is met.

The frame 7 is provided with a movable stop dog 8, and the stop dog 8 and the two turntables 2 are positioned between the same. The stop dog 8 is used for limiting the straight spring part, and one end of the straight spring part is propped against the stop dog 8, so that the straight spring part is prevented from moving.

The rest of the fifth embodiment is the same as any of the above-described embodiments.

The present application has been described in detail above, and specific examples thereof are used herein to explain the principles and implementations of the present application, which are presented solely to aid in understanding the present application and its core concepts. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims

1. A spring bending machine is characterized by comprising two bending assemblies and two power devices respectively connected with the two bending assemblies; the bending assembly comprises a clamping and bending assembly arranged on the rotary table, the clamping and bending assembly is provided with an installation groove for the straight spring part to pass through, the power device works to drive the rotary table to rotate around a central shaft of the rotary table, and the rotary table rotates to bend the straight spring part passing through the installation groove; the controller is connected with the two power devices and controls the power devices to work; the power device comprises a servo motor, and the controller controls the servo motor to rotate forwards, reversely or stop; the clamping and bending assembly comprises a first base block and a second base block, and a distance exists between the first base block and the second base block and forms the mounting groove; the second base block is movable on the turntable, and the movable second base block adjusts the distance from the first base block.

2. The spring bending machine according to claim 1, wherein the servo motor is connected to a first gear, the turntable is connected to a second gear, the second gear is coaxial with the turntable, and the first gear is engaged with the second gear.

3. The spring bending machine according to claim 2, wherein the second gear is a sector gear, the second gear is a semi-circle and includes a side plane, the two second gears are oppositely disposed, the side planes of the two second gears are parallel to each other, and the side plane is located at a position close to each other of the two second gears.

4. The spring bending machine according to claim 1, wherein the first base block includes a first end and a second end, the first end contacting the straight spring member, the first end having a contact surface, the contact surface being curved and contacting the straight spring member; the central shaft of the turntable is tangent to the contact surface; one side surface of the second base block is an acting surface for applying force to the spring part, and the acting surface is a smooth curved surface.

5. The spring bending machine according to claim 1, wherein the outer periphery of the rotary table is provided with a resting plate, and the top surface of the resting plate and the top surface of the rotary table are positioned on the same horizontal plane.

6. The spring bending machine according to claim 1, comprising a frame, on which a guide rail is mounted; one bending assembly is fixed on the frame; and the other bending assembly is arranged on the sliding rail and can move along the sliding rail, so that the distance between the two bending assemblies is changed.

7. The spring bending machine according to claim 6, wherein the frame is provided with a movable stopper, and the stopper is positioned between the same two turntables; one end of the straight spring piece is propped against the stop block.

8. The spring bending machine according to claim 7, wherein the frame is marked with a scale indicating the distance between the mounting slots of the two bending assemblies.