CN112718953A

CN112718953A - Auxiliary bending feeding equipment for U-shaped metal plate bending forming production line

Info

Publication number: CN112718953A
Application number: CN202011500815.8A
Authority: CN
Inventors: 付泽民; 张祥
Original assignee: Shanghai Institute of Technology
Current assignee: Shanghai Institute of Technology
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-04-30

Abstract

The application discloses a feeding equipment that bends is assisted for in U-shaped panel beating shaping production line, including bender and numerical control system, still include with the actuating system that numerical control system connects, actuating system includes base, frame, holds in the palm the flitch, presses flitch and backup pad, the base is fixed in on the bender, the rack-mount is on the base, hold in the palm the flitch, press flitch and backup pad from the top down in proper order and install inside the frame, the backup pad is installed in the frame, press the flitch to install in the backup pad. The device provided by the invention has the advantages of reasonable layout, high efficiency and good stability, and can realize automatic feeding and accurate positioning in the bending process of the U-shaped metal plate; the invention can reduce the working strength of workers, improve the production efficiency and liberate and develop the productivity.

Description

Auxiliary bending feeding equipment for U-shaped metal plate bending forming production line

Technical Field

The application relates to the technical field of machining and manufacturing, in particular to auxiliary bending feeding equipment used in a U-shaped metal plate bending forming production line.

Background

With the rapid development of science and technology, modern manufacturing technology gradually enters into the automatic era, plate forming equipment is also rapidly developed under the background of the automatic era, and a bending machine is used as common processing equipment for bending metal plates in the plate processing industry and has a wider application range.

However, in the production and processing, because the large-scale plate is usually manually fed by a traditional worker, in the feeding process, the worker firstly pushes the plate to an approximate position, and after manual measurement is carried out, the plate is clamped by an electric block for positioning, so that not only is the labor intensity high, but also the positioning accuracy is low, the bending position can be determined only by repeatedly measuring and pushing the material, and the bending forming of one U-shaped knuckle arm can be completed only in three to four hours generally, so the production efficiency is extremely low, and the economic benefit is difficult to improve; meanwhile, in the bending process, because the weight of the plate is too large, potential hazards are easily generated to the life safety of operators and the safety of equipment in the plate overturning process.

Therefore, an automatic feeding device is needed to realize automatic feeding and accurate positioning in the bending process of the U-shaped metal plate.

Disclosure of Invention

The main aim at of this application provides an supplementary feeding equipment that bends that is arranged in U-shaped panel beating shaping production line of bending to solve present problem.

In order to achieve the above object, the present application provides the following techniques:

the utility model provides an auxiliary bending feeder equipment for in U-shaped panel beating shaping production line that bends, includes bender and numerical control system, still include with the actuating system that numerical control system connects, actuating system includes base, frame, asks flitch, presses flitch and backup pad, the base is fixed in on the bender, rack-mount is on the base, ask flitch, press flitch and backup pad to install inside the frame from the top down in proper order, the backup pad is installed in the frame, press the flitch to install in the backup pad.

The numerical control system is characterized by further comprising a guide system connected with the numerical control system, wherein the guide system comprises a first linear slide rail, a second linear slide rail, a third linear slide rail and a bearing seat with a guide shaft, the guide shaft is mounted on the rack through the guide shaft, and the guide shaft is matched with a linear bearing; the first linear sliding rail is fixed on the base through a bearing seat; the second linear sliding rail is fixed on the supporting plate; the third linear sliding rail is vertically fixed inside the rack.

Preferably, the guide system further comprises a second slider fitted to the third linear guide rail, and the support plate is fixed to the second slider.

Elegant ground, the guidance system still includes first slider, first slider is installed on the second linear slide rail, the clamp plate is fixed on the first slider.

Elegant ground, the guidance system still includes the third slider, and the third slider is installed on the first linear slide rail, the frame is fixed on the third slider.

And a rack is arranged at the bottom of the material supporting plate and is connected with the linear bearing in a matching way.

And a cushion block is arranged between the rack and the material supporting plate, the cushion block is welded on the rack, and a ball is arranged on the upper part of the cushion block.

The utility model discloses a numerical control system, including the cylinder drive mechanism, cylinder and cylinder support, the cylinder passes through the locating hole to be installed on the cylinder support, and the cylinder support is fixed in the backup pad, and the numerical control system is connected, transmission system includes cylinder drive mechanism, cylinder drive mechanism includes cylinder and cylinder support, the cylinder passes through the locating hole and installs on the cylinder support, and the cylinder support is fixed in on the backup pad.

Preferably, the transmission system further comprises a gear rack transmission mechanism, the gear rack transmission mechanism comprises a driving gear, a first servo motor and a driven gear, the first servo motor is connected with the driving gear through a second key, and the driving gear is connected with the driven gear through a first key; the driven gear is connected with a reduction gear mechanism, the reduction gear mechanism comprises a driving helical gear, a first helical gear, a second helical gear, a third key and a gear shaft, the driving helical gear is coaxially connected with the driven gear, the first helical gear and the second helical gear are connected onto the gear shaft through the third key, and the first helical gear and the second helical gear are respectively connected with the driving helical gear in a meshed mode.

Preferably, the transmission system further comprises a transverse lead screw transmission mechanism and a longitudinal lead screw transmission mechanism; the transverse screw transmission mechanism comprises a screw fixing seat, a first ball screw, a third servo motor, a first coupler and a first screw nut, the screw fixing seat is fixed on the base, the first ball screw is horizontally fixed on the screw fixing seat and is connected with the third servo motor through the first coupler, and the first screw nut is matched on the first ball screw and is fixedly connected with the rack;

vertical lead screw drive mechanism includes second ball, second screw nut, second coupling and second servo motor, the second coupling is fixed the frame top, second servo motor fixes at second coupling top and is connected with it, second ball connects second coupling and vertical stretching into inside the frame, the cooperation of second screw nut is in on the second ball and fixed connection the backup pad.

Compared with the prior art, this application can bring following technological effect:

1. the device provided by the invention has the advantages of reasonable layout, high efficiency and good stability, and can realize automatic feeding and accurate positioning in the bending process of the U-shaped metal plate;

2. the invention can reduce the working strength of workers, improve the production efficiency and liberate and develop the productivity.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 is a schematic cross-sectional view A-A of FIG. 3 according to the present invention;

FIG. 5 is a schematic view of the transmission structure of the rack and pinion transmission of the present invention;

FIG. 6 is a schematic view of the present invention in operation;

FIG. 7 is a schematic view of the bending and forming process of U-shaped sheet metal of the present invention;

in the figure: 1. a base; 2. a first linear slide rail; 3. a third slider; 4. a lead screw fixing seat; 5. a first ball screw; 6. a third servo motor; 7. a first coupling; 8. a first lead screw nut; 9. a frame; 10. a second base; 11. a driving gear; 12. a spur gear; 13. a first key; 14. a driving bevel gear; 15. a first bearing; 16 a first bevel gear; 17. a third bond; 18. a second helical gear; 19. a gear shaft; 20. a second bearing; 21. a rack; 22 a second key; 23. a first servo motor; 24. a guide shaft support; 25. a guide shaft; 26. a linear bearing; 27. cushion blocks; 28. a material supporting plate; 29. a second linear slide rail; 30. a first slider; 31. a material pressing plate; 32. a cylinder; 33. a cylinder support; 34. a third linear slide rail; 35. a second slider; 36. a support plate; 37. a second ball screw; 38. a second lead screw nut; 39. a second coupling; 40. a second servo motor.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, 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, and it is obvious that the described embodiments are only partial embodiments of the present application, but 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.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

In addition, the term "plurality" shall mean two as well as more than two.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1

The utility model provides a supplementary feeding equipment that bends for in U-shaped panel beating bending production line, includes bender and numerical control system, still include with the actuating system that numerical control system connects, actuating system includes base 1, frame 9, asks flitch 28, pressure flitch 31 and backup pad 36, base 1 is fixed in on the bender, frame 9 is installed on base 1, ask flitch 28, pressure flitch 31 and backup pad 36 to install inside frame 9 from the top down in proper order, backup pad 36 installs on frame 9, pressure flitch 31 is installed in backup pad 36.

As shown in the attached figures 1-3,

the numerical control system is used for controlling the work of each part, and comprises a bending machine, a numerical control system and an execution system connected with the numerical control system.

The base 1 is horizontally butted with a bending machine, the rack 9 is arranged on the base 1, the front end of the rack 9 is in direct contact with a bending piece, the function of blocking is realized, and the front end of the rack is a directly stressed part, so that a pressure sensor is required to be arranged at the front end of the rack to ensure that the rack sends real-time response at the moment of contacting the bending piece, and the high efficiency and high precision of the feeding device are ensured; the material pressing plate 31 is arranged on the supporting plate 36, and the main function of the material pressing plate 31 is to press the material pressing plate 31 downwards to support a bent piece after one-pass bending is finished in the bending and feeding process of the material pressing plate 31, so that the workpiece is prevented from turning over due to self-center deviation, and meanwhile, the material pressing plate is matched with other components to convey the plate to a next bending point; the supporting plate 36 is mounted on the frame 9 and is mainly used for moving the pressure plate 31 in the vertical direction.

The metal plate bending machine is used in pairs, in practical application, two sets of same equipment (one pair) are arranged on two sides of the bending machine, and the number of pairs of the equipment to be arranged can be selected according to the length of a metal plate.

The working process is as follows: the metal plate is bent in one pass, after the male die is raised, the bent piece tilts and turns under the action of self gravity due to the fact that the gravity center is shifted leftwards, and finally the bent piece stops on the front retainer plate 28; the rear frame moves towards the front frame, the bending piece is pushed to abut against a front retainer plate, namely the front frame, and at the moment, the front support plate 36 drives the pressing plate 31 to move downwards to press the bending piece; the rear retainer plate 28 extends out, the bent part is forked, the front frame 9 and the rear frame 9 move together in the horizontal direction, the bent part is sent to a next bending mark point, accurate positioning is completed, after the male die is pressed downwards, the pressing plate 31 rises and retracts to the original working position, and the bending machine bends the next pass.

The numerical control system is connected with a guide system, the guide system comprises a first linear slide rail 2, a second linear slide rail 29, a third linear slide rail 34 and a bearing seat 24 with a guide shaft 25, the guide shaft 25 is mounted on the frame 9 through the guide shaft 24, and a linear bearing 26 is matched on the guide shaft 25; the first linear sliding rail 2 is fixed on the base 1 through a bearing seat 24; the second linear slide rail 29 is fixed on the support plate 36; the third linear slide 34 is vertically fixed inside the frame 9.

The guide shaft 25 is mounted on the frame 9 through the guide shaft 24, the guide shaft 25 is matched with the linear bearing 26, and the first linear sliding rail 2 is fixed on the base 1 through the bearing seat 24; the second linear slide rail 29 is positioned on the support plate 36 through the mounting hole, and the inner side is positioned against the shoulder and the outer side is positioned by a set screw; the third linear slide 34 is fixed vertically inside the frame 9.

The guide shaft 25 is mounted on the frame 9 by means of a guide shaft support 24 and is intended to provide a guide for the movement of the retainer plate 28.

Advantageously, the guide system also comprises a second slider 35 fitted on a third linear guide 34, the support plate 36 being fixed on the second slider 35.

The third linear sliding rail 34 is positioned on the frame 9 through a mounting hole, the inner side of the third linear sliding rail is positioned by leaning against the shoulder, and the outer side of the third linear sliding rail is positioned by a set screw; the second sliding block 35 is composed of four blocks and is installed on the third linear sliding rail 34; the support plate 36 is mounted on the four second sliders 35 through the positioning holes, and performs reciprocating movement of the support plate in the vertical direction.

Advantageously, the guiding system further comprises a first slider 30, said first slider 30 being mounted on said second linear guide 29, said pressure plate 31 being fixed on said first slider 30.

The guide system also comprises a first sliding block 30 which consists of 4 blocks, and the first sliding block 30 is arranged on the second linear sliding rail 29; the pressing plate 31 is installed on the 4 first sliders 30 through the positioning holes, and the reciprocating motion of the pressing plate 31 in the horizontal direction is completed.

Elegant ground, the guidance system still includes third slider 3, and third slider 3 installs on first linear slide rail 2, frame 9 is fixed on the third slider 3.

The third sliding block 3 consists of 4 blocks and is arranged on the first linear sliding rail 2; and the rack (9) is arranged on the 4 third sliding blocks (3) through the positioning holes to finish the reciprocating motion of the rack in the horizontal direction.

Preferably, the retainer plate 28 is provided with a rack 21 at the bottom thereof, and the rack 21 is connected with the linear bearing 26 in a matching manner.

The rack 21 is connected with a linear bearing 26 in a matching way. The rack 21 is arranged on the retainer plate 28 through a positioning hole, and the reciprocating motion of the retainer plate 28 in the horizontal direction is accurately realized through the transmission of the wheel train.

Advantageously, a cushion block 27 is arranged between the frame 9 and the retainer plate 28, the cushion block 27 is welded on the frame 9, and balls are arranged on the upper portion of the cushion block 27.

A cushion block 27 is arranged between the frame 9 and the retainer plate 28, the cushion block 27 is welded on the frame 9, and balls which are arranged in sequence are arranged at the upper part of the cushion block 27 and used for reducing the friction force of the retainer plate 28 and simultaneously providing support for the front end of the retainer plate 28.

Elegant ground, still include with the transmission system that numerical control system connects, transmission system includes cylinder drive mechanism, cylinder drive mechanism includes cylinder 32 and cylinder support 33, cylinder 32 installs on cylinder support 33 through the locating hole, and cylinder support 33 is fixed in on the backup pad 36.

The cylinder bracket 33 is fixed on the support plate 36 through a positioning hole, and further, the cylinder 32 is connected with the pressure plate 31 through a positioning hole on the pressure plate 31, so that the horizontal movement of the pressure plate 31 is realized.

Advantageously, the transmission system further comprises a rack and pinion transmission mechanism, the rack and pinion transmission mechanism comprises a driving gear 11, a first servo motor 23 and a driven gear 12, the first servo motor 23 is connected with the driving gear 11 through a second key 22, and the driving gear 11 is connected with the driven gear 12 through a first key 13; the driven gear 12 is connected with a reduction gear mechanism, the reduction gear mechanism comprises a driving bevel gear 14, a first bevel gear 16, a second bevel gear 18, a third key 17 and a gear shaft 19, the driving bevel gear 14, the first bevel gear 16, the second bevel gear 18, the third key 17 and the gear shaft 19 are coaxially connected with the driven gear 12, the first bevel gear 16 and the second bevel gear 18 are connected to the gear shaft 19 through the third key 17, and the first bevel gear 16 and the second bevel gear 18 are respectively connected with the driving bevel gear 14 in a meshed mode.

As shown in fig. 1-5, the gear rack transmission mechanism is arranged in a U shape, the driving gear 11 is connected with the servo motor 23 through the second key 22, the driving gear 11 is engaged with the driven gear 12, the gear ratio is 1:3, and the driven gear 12 is connected with the reduction gear mechanism. The driving gear 11 is mounted on a shaft of a servo motor 23 through a key 22, and the end part of the shaft of the servo motor 23 is axially positioned through a bolt and a nut to limit the axial degree of freedom of the driving gear 11; and is engaged with the driving gear 11, the inner side of the driven gear 12 is positioned by a shaft shoulder, the outer side is positioned by an axial retainer ring and is fixed by a set screw, and the axial degree of freedom is limited.

The gear rack transmission mechanism is mainly realized by combining a straight gear, a helical gear and a rack, and because of the working condition and space limitation, the gear has low rotating speed and large driving torque, a servo motor is not suitable for directly driving the gear to drive the rack, so a secondary reduction gear set needs to be designed;

the speed reducing gear mechanism comprises a driving bevel gear 14 coaxially connected with a driven gear 12, the driven gear 12 is mounted on the driving bevel gear 14 through a first key 13, the driving

bevel gears

16 and 18 are respectively meshed with the driving bevel gear 14 and are mounted at 90 degrees with each other, the arrangement gear ratio is 1:2, and the rack 21 is driven to move in the same direction;

the reduction gear mechanism is arranged on a shell and is fixed on the second base 10.

The first bevel gear 16 and the second bevel gear 18 are installed on a gear shaft 19 through a third key 17 to realize coaxial transmission; the gear shaft 19 is arranged on the base 10 through a bearing 20, the base 10 is arranged on the frame 9 through a positioning hole, and the first bevel gear 16 and the second bevel gear 18 are meshed with the driving bevel gear 14; the bevel gear 14 is sleeved with a bearing 15.

Preferably, the transmission system further comprises a transverse lead screw transmission mechanism and a longitudinal lead screw transmission mechanism; the transverse screw transmission mechanism comprises a screw fixing seat 4, a first ball screw 5, a third servo motor 6, a first coupler 7 and a first screw nut 8, the screw fixing seat 4 is fixed on the base 1, the first ball screw 5 is horizontally fixed on the screw fixing seat 4 and is connected with the third servo motor 6 through the first coupler 7, and the first screw nut 8 is matched on the first ball screw 5 and is fixedly connected with the rack 9;

as shown in fig. 4, the longitudinal screw transmission mechanism includes a second ball screw 37, a second screw nut 38, a second coupling 39, and a second servo motor 40, the second coupling 39 is fixed on the top of the frame 9, the second servo motor 40 is fixed on the top of the second coupling 39 and connected thereto, the second ball screw 37 is connected to the second coupling 39 and vertically extends into the frame 9, and the second screw nut 38 is fitted on the second ball screw 37 and fixedly connected to the support plate 36.

The transmission system is composed of ball screw transmission, gear rack transmission and cylinder transmission.

The transverse screw transmission mechanism comprises a screw fixing seat 4, a first ball screw 5, a third servo motor 6, a first coupler 7 and a first screw nut 8, the screw fixing seat 4 is fixed on the base 1, the first ball screw 5 is horizontally fixed on the screw fixing seat 4 and is connected with the third servo motor 6 through the first coupler 7, and the first screw nut 8 is matched on the first ball screw 5 and is fixedly connected with the rack 9, so that the transmission of the rack 9 is realized;

the air cylinder 32 is mounted on the air cylinder support 33 through a positioning hole, the air cylinder support 33 is fixed on the support plate 36 through a positioning hole, and the air cylinder 32 is further connected with the pressure plate 31 through a positioning hole in the pressure plate 31, so that the pressure plate 31 can move in the horizontal direction, and the support plate 36 can move in the vertical direction.

As shown in fig. 6 and 7, the equipment is used in pairs, and in practical application, two sets of same equipment (one pair) are installed on two sides of a bending machine, and the number of pairs of equipment to be installed can be selected according to the length of a metal plate.

The working process is as follows: the metal plate is bent in one pass, after the male die is raised, the bent piece tilts and turns under the action of self gravity due to the fact that the gravity center is shifted leftwards, and finally the bent piece stops on the front retainer plate 28; the frame 9 has two front and back frames, the back frame moves towards the front frame, the bending piece is pushed to abut against the front retainer plate, namely the front frame, at the moment, the front support plate 36 drives the press plate 31 to move downwards to press the bending piece, and the schematic diagram of the bending deformation stress of the bending piece is shown in figure 7; the rear retainer plate 28 extends out, the bent part is forked, the front frame 9 and the rear frame 9 move together in the horizontal direction, the bent part is conveyed to a next bending mark point, accurate positioning is completed, after the male die is pressed downwards, the pressing plate 31 rises and retracts to the original working position, the bending machine bends the next pass, and the product shown in the attached drawing 6 is formed.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a feeding equipment that bends in assistance that is arranged in U-shaped panel beating to bend and takes shape production line, includes bender and numerical control system, its characterized in that, still include with the actuating system that numerical control system connects, actuating system includes base (1), frame (9), holds in the palm flitch (28), presses flitch (31) and backup pad (36), base (1) is fixed in on the bender, frame (9) are installed on base (1), ask flitch (28), press flitch (31) and backup pad (36) to install inside frame (9) from the top down in proper order, backup pad (36) are installed in frame (9), press flitch (31) to install in backup pad (36).

2. The auxiliary bending and feeding equipment for the U-shaped sheet metal bending and forming production line is characterized by further comprising a guide system connected with the numerical control system, wherein the guide system comprises a first linear sliding rail (2), a second linear sliding rail (29), a third linear sliding rail (34) and a bearing seat (24) with a guide shaft (25), the guide shaft (25) is mounted on the frame (9) through the guide shaft (24), and the guide shaft (25) is matched with a linear bearing (26); the first linear sliding rail (2) is fixed on the base (1) through a bearing seat (24); the second linear sliding rail (29) is fixed on the supporting plate (36); the third linear sliding rail (34) is vertically fixed inside the rack (9).

3. An auxiliary bending and feeding device used in a U-shaped sheet metal bending and forming production line as claimed in claim 2, wherein the guiding system further comprises a second sliding block (35) matched on a third linear sliding rail (34), and the supporting plate (36) is fixed on the second sliding block (35).

4. The auxiliary bending and feeding device for the U-shaped sheet metal bending and forming production line as claimed in claim 2 or 3, wherein the guiding system further comprises a first sliding block (30), the first sliding block (30) is mounted on the second linear sliding rail (29), and the pressing plate (31) is fixed on the first sliding block (30).

5. The auxiliary bending and feeding device for the U-shaped sheet metal bending and forming production line as claimed in claim 4, wherein the guiding system further comprises a third sliding block (3), the third sliding block (3) is mounted on the first linear sliding rail (2), and the rack (9) is fixed on the third sliding block (3).

6. The auxiliary bending and feeding device for the U-shaped sheet metal bending and forming production line as claimed in claim 2 or 5, wherein a rack (21) is arranged at the bottom of the retainer plate (28), and the rack (21) is connected with the linear bearing (26) in a matching manner.

7. An auxiliary bending and feeding device used in a U-shaped sheet metal bending and forming production line according to claim 6, characterized in that a cushion block (27) is arranged between the frame (9) and the retainer plate (28), the cushion block (27) is welded on the frame (9), and balls are arranged on the upper portion of the cushion block (27).

8. The auxiliary bending feeding device for the U-shaped sheet metal bending and forming production line according to claim 1 or 7, further comprising a transmission system connected with the numerical control system, wherein the transmission system comprises an air cylinder transmission mechanism, the air cylinder transmission mechanism comprises an air cylinder (32) and an air cylinder support (33), the air cylinder (32) is mounted on the air cylinder support (33) through a positioning hole, and the air cylinder support (33) is fixed on the support plate (36).

9. The auxiliary bending and feeding device for the U-shaped sheet metal bending and forming production line as claimed in claim 8, wherein the transmission system further comprises a rack and pinion transmission mechanism, the rack and pinion transmission mechanism comprises a driving gear (11), a first servo motor (23) and a driven gear (12), the first servo motor (23) is connected with the driving gear (11) through a second key (22), and the driving gear (11) is connected with the driven gear (12) through a first key (13); the driven gear (12) is connected with a reduction gear mechanism, the reduction gear mechanism comprises a driving bevel gear (14), a first bevel gear (16), a second bevel gear (18), a third key (17) and a gear shaft (19), the driving bevel gear (14), the first bevel gear (16), the second bevel gear (18), the third key (17) and the gear shaft (19) are coaxially connected with the driven gear (12), the first bevel gear (16) and the second bevel gear (18) are connected onto the gear shaft (19) through the third key (17), and the driving bevel gear (14) is respectively connected with the first bevel gear (16) and the second bevel gear (18) in a.

10. The auxiliary bending and feeding device for the U-shaped sheet metal bending and forming production line according to claim 8, wherein the transmission system further comprises a transverse lead screw transmission mechanism and a longitudinal lead screw transmission mechanism; the transverse screw transmission mechanism comprises a screw fixing seat (4), a first ball screw (5), a third servo motor (6), a first coupler (7) and a first screw nut (8), the screw fixing seat (4) is fixed on the base (1), the first ball screw (5) is horizontally fixed on the screw fixing seat (4) and is connected with the third servo motor (6) through the first coupler (7), and the first screw nut (8) is matched on the first ball screw (5) and is fixedly connected with the rack (9);

the longitudinal screw transmission mechanism comprises a second ball screw (37), a second screw nut (38), a second coupler (39) and a second servo motor (40), the second coupler (39) is fixed to the top of the rack (9), the second servo motor (40) is fixed to the top of the second coupler (39) and connected with the second coupler, the second ball screw (37) is connected with the second coupler (39) and vertically extends into the rack (9), and the second screw nut (38) is matched with the second ball screw (37) and fixedly connected with the supporting plate (36).