CN113245410B

CN113245410B - Continuous bending machine

Info

Publication number: CN113245410B
Application number: CN202110748847.8A
Authority: CN
Inventors: 车江洪; 于红波
Original assignee: Xuzhou Weide Metal Products Co ltd
Current assignee: Xuzhou Weide Metal Products Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2021-09-24
Anticipated expiration: 2041-07-02
Also published as: CN113245410A

Abstract

The invention relates to the field of metal processing, in particular to a continuous bending machine which comprises two wall plates arranged in parallel, a first connecting post and a second connecting post which are respectively arranged between the two wall plates and are arranged at two ends of the wall plates, wherein a plurality of conveying rollers are arranged in parallel between the two corresponding wall plates above the first connecting post, a conveying belt is sleeved outside the conveying rollers, a bending mechanism is arranged between the conveying belt and the second connecting post, the bending mechanism comprises a rotating plate capable of rotating up and down, a die matched with the bending angle of a workpiece and a telescopic cylinder, a collecting mechanism is arranged on the second connecting post, and the collecting mechanism comprises a lifting plate capable of moving up and down and a control plate for controlling the movement of the lifting plate. The continuous bending machine disclosed by the invention realizes continuous bending of workpieces, can collect and stack the bent workpieces, is high in production continuity and saves manpower.

Description

Continuous bending machine

Technical Field

The invention relates to the field of metal processing, in particular to a continuous bending machine.

Background

The existing bending machine needs manual matching to be taken down for adjustment when bending a workpiece, so that the potential safety hazard is great, the production efficiency is not high, and the workpiece is difficult to be bent continuously. In addition, the bent workpieces also need to be manually taken down and stacked, which wastes manpower and easily damages the workpieces.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a continuous bending machine which can continuously bend workpieces and can collect and stack the bent workpieces. The technical scheme of the invention is as follows:

a continuous bending machine comprises two wall plates arranged in parallel, a first connecting column and a second connecting column, wherein the first connecting column and the second connecting column are respectively arranged between the two wall plates and are arranged at two ends of each wall plate; a plurality of conveying rollers are arranged between the two corresponding wall plates above the first connecting post in parallel, and a conveying belt is sleeved outside the conveying rollers.

A bending mechanism is arranged between the conveyor belt and the second connecting column; the bending mechanism comprises a rotating plate capable of rotating up and down, a die matched with the bending angle of the workpiece and a telescopic cylinder.

A collecting mechanism is arranged on the second connecting column; the collecting mechanism comprises a lifting plate capable of moving up and down and a control plate for controlling the movement of the lifting plate.

Further, the rotating plate rotates through a rotating shaft arranged above the second connecting column; the rotor plate all has a support arm towards two borders of wallboard, and two support arms are parallel to each other, all extend to the direction of transfer roller.

The mould is arranged between the wall plates below the plane of the conveyor belt and positioned outside the path through which the supporting arm passes when the rotating plate rotates; the mould is arc-shaped, and the radian is matched with the path passed by the supporting arm.

A limiting plate is fixed between the corresponding wall plates below the supporting arms; when the rotating plate rotates to the lower end of the die, the lower surface of the supporting arm is tightly attached to the limiting plate; the telescopic cylinder is arranged on the limiting plate corresponding to the position between the two supporting arms, and the diameter of the telescopic cylinder is smaller than the distance between the two supporting arms.

Furthermore, a fixed plate is fixed between the corresponding wall plates at the position of one side of the die away from the rotating plate, and a first spring with a telescopic path in the same straight line with the telescopic path of the telescopic cylinder is arranged at one side of the fixed plate facing the rotating plate; and a through groove for the first spring to pass through is formed in the middle of the mold from top to bottom.

Furthermore, a first limiting block of which the outer surface is matched with the bending angle of the workpiece is fixed at the free end of the first spring, and the lower end of the first limiting block extends towards the telescopic cylinder to form a lower limiting plate which is vertical to the first limiting block; when the first spring naturally extends, one surface of the first limiting block, which is close to the telescopic cylinder, and one surface of the die, which is close to the telescopic cylinder, are on the same plane.

And a second limiting block matched with the bending angle of the workpiece is fixed at the outer end of the piston rod of the telescopic cylinder corresponding to the upper position of the lower limiting plate.

Further, when the rotating plate rotates to be horizontal, the upper surface of the supporting arm is below the upper surface of the conveyor belt; the upper part of one end of the supporting arm close to the conveying belt is arc-shaped.

Furthermore, a collecting column is vertically fixed at one end of the lifting plate, which is far away from the telescopic cylinder; the second connecting column is provided with a lifting groove for the lifting plate to pass through and move up and down;

a bearing block made of a buffer material is arranged above the lifting plate, and a sliding block is fixed below the bearing block; one end of the lifting plate, which is far away from the telescopic cylinder, is provided with a movable groove for the sliding block to extend into and move along the lifting plate to the direction of the collecting column; and a toggle block penetrating through the lifting plate is fixed below the sliding block.

Furthermore, the two sides of the lifting plate facing the inner wall of the lifting groove are respectively fixed with a lifting block, and the inner wall of the lifting groove corresponding to the position of each lifting block is respectively provided with a first sliding groove for the lifting block to extend into and move up and down.

A plurality of pulleys are respectively arranged at two ends of the sliding block, which face to the inner walls of the two sides of the movable groove, and second sliding grooves, which are used for the pulleys to extend into and move along the lifting plate to the direction of the collecting column, are respectively arranged on the inner walls of the movable groove corresponding to the positions of the pulleys at the two ends; the upper surface of the outer end of the lifting plate is arc-shaped, and the part of the second sliding groove, which is positioned at the outer end of the lifting plate, is also arc-shaped and has the same radian as the lifting plate.

Furthermore, a groove with an opening facing the movable groove is formed in the lifting plate, and a second spring with two ends fixedly connected with the inner wall of the bottom of the groove and the sliding block is arranged in the groove.

And a connecting plate is fixed at one end of the lifting plate corresponding to one side of the second connecting column close to the telescopic cylinder, and the length of the connecting plate is within the range from the width of the second connecting column to the width of the lifting groove.

Furthermore, the distance from the top end of the control plate to the lower surface of the lifting plate is smaller than the height of the poking block.

The control panel is equipped with respectively towards the both sides top of lifting groove inner wall and hugs closely the gyro wheel of lifter plate lower surface.

Furthermore, the lower end of the lifting groove extends into the second connecting column to form a rotating groove which is used for accommodating the control panel and accommodating the control panel to rotate towards the direction of the collecting column; the rotating groove at the lower end of the control plate is internally provided with a rotating shaft, and the control plate rotates by taking the rotating shaft as an axis.

The length of the workpiece is greater than the distance between the outer side surfaces of the two supporting arms and less than the distance between the inner walls of the two wall plates.

Based on the technical scheme, the invention can realize the following technical effects.

1. According to the continuous bending machine, the workpieces to be bent are sequentially conveyed to the supporting arms to wait for bending, so that the workpieces can be continuously bent conveniently, the production continuity and the streamlined production are realized, the production efficiency is improved, and the personnel intervention is reduced.

2. According to the continuous bending machine, the supporting arm rotates downwards, the posture of the workpiece is adjusted to be changed from horizontal to vertical and close to the die by means of the cooperation of gravity, inertia and the telescopic cylinder, so that large errors are avoided during bending, and the supporting arm rotates upwards to provide power for the workpiece to move towards the direction of the lifting plate.

3. According to the continuous bending machine, the first spring and the first limiting block fixed by the first spring are matched with the second limiting block to clamp and fix the workpiece, and after the bending is finished, the workpiece is conveyed to the supporting arm, so that the original posture is adjusted, the gravity center is lowered, the workpiece is conveniently conveyed from the supporting arm to the lifting plate, the stability and the certainty of conveying are ensured, and the workpiece is prevented from falling and being damaged.

4. According to the continuous bending machine, the lifting plate gradually moves downwards along with the increase of the number of the workpieces borne above, the control plate is forced to gradually move towards the outer end of the lifting plate at the same time until the poking block is pushed to rotate the bearing block, the stacked workpieces are overturned out of the collecting column to form automatic collection, all the automatic collection is realized by adopting a mechanical structure, errors possibly caused by depending on electronic elements such as a sensor are avoided, stability and reliability are realized, and the cost is reduced.

5. According to the continuous bending machine, the weight of the workpieces borne on the lifting plate is balanced with the torsion of the torsion spring, the lifting plate gradually moves downwards stably along with the stacking of the workpieces, and meanwhile, the control plate and the roller on the control plate form triangular support for the lifting plate, so that the structure is stable.

6. According to the continuous bending machine, after the control plate reaches the shifting block, the shifting block is further pushed to move outwards along with the increase of the weight above the control plate, so that the bearing block integrally moves towards the outer end of the lifting plate, the bearing block is turned over along the arc at the outer end of the lifting plate, the falling and collection of workpieces are completed, the gravity of the workpieces is used as power, the energy consumption is saved, and the energy and labor cost is reduced.

7. According to the continuous bending machine, the torsion spring and the second spring can respectively help the control plate and the bearing block to reset after a workpiece on the bearing block is unloaded to the outside of the collecting column, so that the subsequent workpiece above the control plate and the bearing block can be continuously borne, and the continuity is good.

Drawings

Fig. 1 is a front view schematic diagram of a continuous bending machine of the present invention.

Figure 2 is a schematic diagram of the operating structure of the continuous bending machine of the present invention.

Figure 3 is a schematic top view of the continuous bending machine of the present invention.

Figure 4 is a cross-sectional view a-a of figure 1 of the continuous bending machine of the present invention.

Figure 5 is a cross-sectional view B-B of figure 1 of the continuous bending machine of the present invention.

Figure 6 is a cross-sectional view C-C of figure 2 of the continuous bending machine of the present invention.

Figure 7 is an enlarged view a of figure 1 of the continuous bending machine of the present invention.

In the figure: 1-a wall plate; 11-a first connecting column; 12-a second connecting column; 2-a conveying roller; 21-a conveyor belt; 3-rotating the plate; 31-a support arm; 32-a mold; 33-fixing the plate; 34-a first spring; 35-a first stopper; 36-a second stopper; 37-telescoping cylinder; 38-limiting plate; 4-lifting plate; 41-a bearing block; 42-a connecting plate; 43-control panel; 44-a collection column; 45-lifting block; 46-a roller; 47-torsion spring; 5-a sliding block; 51-a dial block; 52-a groove; 53-a second spring; 54-a pulley; 55-a second chute; 56-active slot.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, and it is to be understood that the described embodiments are merely illustrative of some, but not all, embodiments of the invention.

As shown in fig. 1 to 7, the present embodiment provides a continuous bending machine, which includes two wall plates 1 disposed in parallel with each other, and a first connecting column 11 and a second connecting column 12 respectively disposed between the two wall plates 1 and disposed at two ends of the wall plates 1. A plurality of conveying rollers 2 are arranged in parallel between two corresponding wall plates 1 above the first connecting post 11, and a conveying belt 21 is sleeved outside the conveying rollers 2. A bending mechanism is arranged between the conveyor belt 21 and the second connecting column 12. The bending mechanism comprises a rotating plate 3 which can rotate up and down, a die 32 matched with the bending angle of the workpiece and a telescopic cylinder 37. The second connecting column 12 is provided with a collecting mechanism. The collecting mechanism includes a lifting plate 4 movable up and down and a control plate 43 controlling the movement of the lifting plate 4.

Preferably, the rotating plate 3 is rotated by a rotating shaft provided above the second connecting column 12. One side of the rotating plate 3 far away from the second connecting column 12 and two ends of the rotating plate 3 extend towards the conveying roller 2 respectively to form two supporting arms 31 which are parallel to each other. The moulds 32 are arranged between the wall panels 1 below the plane of the conveyor belt 21 and outside the path taken by the support arms 31 when the rotating plate 3 rotates. The die 32 is arcuate and the arc matches the path traversed by the support arm 31. A limiting plate 38 is fixed between the corresponding wall plates 1 below the supporting arms 31; when the rotating plate 3 rotates to the side of the mold 32 near the lower end, the lower side wall of the support arm 31 abuts against the stopper plate 38. The telescopic cylinder is arranged on the corresponding limiting plate 38 at the position between the two supporting arms 31, and the diameter of the telescopic cylinder is smaller than the distance between the two supporting arms.

Preferably, a fixed plate 33 is fixed between the corresponding wall plates 1 at a position on the side of the mold 32 away from the rotating plate 3, and a first spring 34 having a telescopic path in the same line with a telescopic path of the telescopic cylinder 37 is provided on the side of the fixed plate 33 facing the rotating plate 3. The mold 32 is provided with a through slot from top to bottom in the middle for the first spring 34 to pass through.

Preferably, a first limiting block 35 with an outer surface matched with the bending angle of the workpiece is fixed at the free end of the first spring 34, and the lower end of the first limiting block 35 extends towards the telescopic cylinder 37 to form a lower limiting plate perpendicular to the first limiting block 35. A second limiting block 36 matched with the bending angle of the workpiece is fixed at the outer end of the piston rod of the telescopic cylinder 37 corresponding to the position above the lower limiting plate; when the first spring 34 naturally extends, a surface of the first stopper 35 close to the telescopic cylinder 37 and a surface of the die 32 close to the telescopic cylinder 37 are on the same plane.

Preferably, when the rotating plate 3 is rotated to be horizontal, the upper surface of the support arm 31 is below the upper surface of the conveyor belt 21. The upper part of one end of the supporting arm 31 close to the conveyor belt 21 is in the shape of a circular arc.

Preferably, a collecting column 44 is vertically fixed to one end of the lifting plate 4 away from the telescopic cylinder 37. The second connecting column 12 is provided with a lifting slot for the lifting plate 4 to pass through and move up and down. A receiving block 41 made of a buffer material is provided above the lifting plate 4, and a slide block 5 is fixed below the receiving block 41. The end of the lifting plate 4 far away from the telescopic cylinder 37 is provided with a movable groove 56 for the sliding block 5 to extend into and move along the lifting plate 4 towards the collecting column 44. A toggle block 51 passing through the lifting plate 4 is fixed below the sliding block 5.

Preferably, the lifting plate 4 is fixed with the lifting block 45 towards both sides of the inner wall of the lifting groove, and the inner wall of the lifting groove corresponding to the position of each lifting block 45 is provided with a first sliding groove for the lifting block 45 to extend into and move up and down. The two ends of the inner wall of the sliding block 5 facing the two sides of the movable groove 56 are respectively provided with a plurality of pulleys 54, and the inner wall of the movable groove 56 corresponding to the pulley 54 at the two ends is respectively provided with a second sliding groove 55 for the pulley 54 to extend into and move along the lifting plate 4 to the collecting column 44. The upper surface of the outer end of the lifting plate 4 is arc-shaped, and the part of the second sliding groove 55 located at the outer end of the lifting plate 4 is also arc-shaped and has the same radian as the lifting plate 4.

Preferably, a groove 52 with an opening facing the movable groove 56 is formed in the lifting plate 4, and a second spring 53 is formed in the groove 52 and has two ends fixedly connected to the inner wall of the groove bottom of the groove 52 and the sliding block 5. A connecting plate 42 is fixed at one end of the lifting plate 4 corresponding to one side position of the second connecting column 12 close to the telescopic cylinder 37, and the length of the connecting plate 42 is within the range from the width of the second connecting column 12 to the width of the lifting groove.

Preferably, the distance from the top end of the control plate 43 to the lower surface of the lifting plate 4 is less than the height of the toggle block 51. The top ends of the two sides of the control plate 43 facing the inner wall of the lifting groove are respectively provided with a roller 46 tightly attached to the lower surface of the lifting plate 4.

Preferably, the lower end of the lifting groove extends into the second connecting column 12 to form a rotating groove for accommodating the control plate 43, and the control plate 43 rotates towards the collecting column 44. A rotating shaft is provided in the rotating groove at the lower end of the control plate 43, and the control plate 43 rotates around the rotating shaft.

Based on the above-described structure, in the continuous bending machine of the present invention, the workpiece to be bent is sequentially moved toward the rotating plate 3 from the conveyor belt 21 until reaching above the support arm 31, and naturally falls onto the support arm 31 due to the height difference between the support arm 31 and the conveyor belt 21. The rotating plate 3 is rotated downward and the workpiece slides to the outermost end of the support arm 31 and is held by the die 32. The distance from the piston rod of the telescopic cylinder 37 to the outer end of the piston rod is matched with the size of the workpiece, the workpiece on the support arm 31 is close to one side of the telescopic cylinder 37 and supported by the second limiting block 36 on the telescopic cylinder 37 and overturned towards the die 32 in the process that the support arm 31 is limited and stopped by the limiting plate 38 after downwards rotating to the limiting plate 38, and meanwhile, the workpiece is supported and limited by the lower limiting plate at the position of the first limiting block 35 to prevent the workpiece from falling. The piston rod of the telescopic cylinder 37 continues to extend towards the workpiece, and the second limiting block 36 and the first limiting block 35 clamp the workpiece together under the action of the first spring 34, so that the workpiece is forced to cling to the die and is bent along the die. After bending is completed, the piston rod retracts, the first limiting block 35 is enabled to be tightly attached to the second limiting block 36 under the action of the elastic force of the first spring 34, the workpiece is pushed onto the supporting arm 31 along with retraction of the piston rod, and the workpiece is inclined towards the supporting arm 31 along the radian of the supporting arm 31 after being blocked by the supporting arm 31. The rotating plate 3 rotates upwards, the bent workpiece naturally turns to be attached to the supporting arm 31 and is driven upwards by the supporting arm 31, the rotating plate 3 rotates to be horizontal and then continues to rotate upwards, the outer end of the supporting arm 31 tilts upwards, and the workpiece on the supporting arm 31 naturally falls towards the lifting plate 4 along the supporting arm 31.

The workpiece falling to the lifting plate 4 naturally falls onto the bearing block 41 under the action of inertia and gravity, and the falling force of the workpiece is buffered through the deformation of the bearing block 41, so that the workpiece is prevented from generating displacement. After the workpiece falls onto the receiving block 41, the total weight of the lifting plate 4 increases, and moves downward while pressing the control plate 43 downward. After the control plate 43 is pressed downwards, the torsion spring 47 deforms, and the rollers 46 on both sides of the control plate 3 roll towards the outer end of the lower surface of the lifting plate 4 tightly until the deformation of the torsion spring 47 and the pressure generated by the weight of the lifting plate 4 are balanced, so that the lifting plate 4, the control plate 43 and the second connecting column 12 form a triangular support. In the process that the workpieces fall onto the bearing blocks 41 one by one and the control panel 3 gradually rotates outwards, the upper part of the control panel 3 abuts against the poking block 51, the poking block 51 is pushed towards the outer end of the lifting plate 4, the pulley 54 is pushed to rotate in the second sliding groove 55, the bearing blocks 41 drive the workpieces to move towards the outer end of the lifting plate 4 in the same direction until the workpieces reach the arc-shaped outer end, the bearing blocks 41 are overturned and inclined along the arc, and the workpieces above fall out of the collecting column 44 from the inclined bearing blocks 41 to finish collection. The weight of the lifting plate 4 without the workpiece above is reduced, and the control plate 43 rotates to the original position by the elasticity of the torsion spring 47 below, so that the lifting plate 4 is pushed to be lifted and reset until the torsion spring 47 recovers. During the process of rotating the control plate 43 to the home position, the shifting block 51, the sliding block 5 and the receiving block 41 which lose the pushing force of the control plate 43 return to the home position under the pulling force of the second spring 53, and wait for the collection of the subsequent workpieces.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A continuous bending machine is characterized by comprising two wall plates (1) which are arranged in parallel, a first connecting column (11) and a second connecting column (12) which are respectively arranged between the two wall plates (1) and arranged at two ends of each wall plate (1); a plurality of conveying rollers (2) are arranged between two corresponding wall plates (1) above the first connecting post (11) in parallel, and a conveying belt (21) is sleeved outside each conveying roller (2);

a bending mechanism is arranged between the conveyor belt (21) and the second connecting column (12); the bending mechanism comprises a rotating plate (3) capable of rotating up and down, a die (32) matched with the bending angle of the workpiece and a telescopic cylinder (37);

a collecting mechanism is arranged on the second connecting column (12); the collecting mechanism comprises a lifting plate (4) capable of moving up and down and a control plate (43) for controlling the movement of the lifting plate (4);

the rotating plate (3) rotates through a rotating shaft arranged above the second connecting column (12); two edges of the rotating plate (3) facing the wall plate (1) are respectively provided with a supporting arm (31), and the two supporting arms (31) are parallel to each other and extend towards the direction of the conveying roller (2);

the mould (32) is arranged between the wall plates (1) below the plane of the conveyor belt (21) and is positioned outside a path through which the supporting arm (31) passes when the rotating plate (3) rotates; the mould (32) is arc-shaped, and the radian of the mould is matched with the path passed by the supporting arm (31);

a limiting plate (38) is fixed between the corresponding wall plates (1) below the supporting arms (31); when the rotating plate (3) rotates to the lower end of the die (32), the lower surface of the supporting arm (31) is tightly attached to the limiting plate (38); the telescopic cylinder is arranged on a limiting plate (38) corresponding to the position between the two supporting arms (31), and the diameter of the telescopic cylinder is smaller than the distance between the two supporting arms;

a collecting column (44) is vertically fixed at one end of the lifting plate (4) far away from the telescopic cylinder (37); the second connecting column (12) is provided with a lifting groove for the lifting plate (4) to pass through and move up and down;

a bearing block (41) made of buffer material is arranged above the lifting plate (4), and a sliding block (5) is fixed below the bearing block (41); one end of the lifting plate (4) far away from the telescopic cylinder (37) is provided with a movable groove (56) for the sliding block (5) to extend into and move along the lifting plate (4) to the direction of the collecting column (44); and a toggle block (51) penetrating through the lifting plate (4) is fixed below the sliding block (5).

2. Continuous bending machine according to claim 1, characterized in that a fixed plate (33) is fixed between the corresponding wall plates (1) at the position of the side of said die (32) away from the rotating plate (3), and a first spring (34) having a telescopic path in line with the telescopic path of the telescopic cylinder (37) is arranged at the side of the fixed plate (33) facing the rotating plate (3); and a through groove for the first spring (34) to pass through is formed in the middle of the mold (32) from top to bottom.

3. Continuous bending machine according to claim 2, characterized in that the free end of said first spring (34) is fixed with a first stopper (35) whose outer surface matches the bending angle of the workpiece, and the lower end of said first stopper (35) extends towards the telescopic cylinder (37) to form a lower stopper perpendicular to said first stopper (35); when the first spring (34) naturally extends, one surface of the first limiting block (35) close to the telescopic cylinder (37) and one surface of the die (32) close to the telescopic cylinder (37) are on the same plane;

and a second limiting block (36) matched with the bending angle of the workpiece is fixed at the outer end of the piston rod of the telescopic cylinder (37) corresponding to the upper position of the lower limiting plate.

4. Continuous bending machine according to claim 1, characterized in that when said rotating plate (3) rotates to a horizontal position, the upper surface of said supporting arm (31) is below the upper surface of said conveyor belt (21); the upper part of one end of the supporting arm (31) close to the conveyor belt (21) is arc-shaped.

5. The continuous bending machine according to claim 1, characterized in that the lifting plates (4) are respectively fixed with lifting blocks (45) at two sides facing the inner wall of the lifting groove, and the inner wall of the lifting groove corresponding to the position of each lifting block (45) is respectively provided with a first sliding groove for the lifting block (45) to extend into and move up and down;

a plurality of pulleys (54) are respectively arranged at two ends of the inner wall of the sliding block (5) facing to the two sides of the movable groove (56), and second sliding grooves (55) for the pulleys (54) to extend into and move along the lifting plate (4) to the direction of the collecting column (44) are respectively arranged on the inner walls of the movable groove (56) corresponding to the positions of the pulleys (54) at the two ends; the upper surface of the outer end of the lifting plate (4) is arc-shaped, and the part of the second sliding groove (55) positioned at the outer end of the lifting plate (4) is also arc-shaped and has the same radian as that of the lifting plate (4).

6. Continuous bending machine according to claim 1, characterized in that said lifting plate (4) is provided with a recess (52) opening towards said movable slot (56), said recess (52) being provided with a second spring (53) having two ends fixedly connected to the inner wall of the bottom of the recess (52) and to said sliding block (5), respectively;

and a connecting plate (42) is fixed at one end of the lifting plate (4) corresponding to one side position of the second connecting column (12) close to the telescopic cylinder (37), and the length of the connecting plate (42) is within the range from the width of the second connecting column (12) to the width of the lifting groove.

7. Continuous bending machine according to claim 1, characterized in that the distance from the top of said control plate (43) to the lower surface of lifting plate (4) is less than the height of said toggle block (51);

and rollers (46) tightly attached to the lower surface of the lifting plate (4) are respectively arranged at the top ends of the two sides of the control plate (43) facing the inner wall of the lifting groove.

8. Continuous bending machine according to claim 1, characterized in that the lower end of said lifting groove extends inside the second connecting column (12) forming a rotation groove housing said control plate (43) and allowing the rotation of said control plate (43) towards the collection column (44); a rotating shaft is arranged in the rotating groove at the lower end of the control plate (43), and the control plate (43) rotates by taking the rotating shaft as an axis.