CN115365347A

CN115365347A - Section steel bending machine

Info

Publication number: CN115365347A
Application number: CN202211317237.3A
Authority: CN
Inventors: 赵增宝; 陈卫锋; 赵勇
Original assignee: Jiangsu Eastern Complete Equipment Manufacturing Group Co ltd
Current assignee: Jiangsu Eastern Complete Equipment Manufacturing Group Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2022-11-22
Anticipated expiration: 2042-10-26
Also published as: CN115365347B

Abstract

The invention discloses a section steel simmer bending machine which comprises a base, wherein a control console is arranged above the base; the clamping assembly is arranged above the base; the bending assembly comprises a fixing frame and a moving frame, limiting assemblies are arranged inside the fixing frame and the moving frame, motors are arranged above the fixing frame and the moving frame, each limiting assembly comprises a fixing column, the upper end of each fixing column is fixedly connected with the output end of each motor, four limiting plates are sleeved outside the fixing columns, multistage telescopic cylinders are arranged inside the fixing columns, and fixing rods are arranged on the inner sides of the four limiting plates.

Description

Section steel bending machine

Technical Field

The invention relates to the technical field of bending machines, in particular to a section steel bending machine.

Background

The bending machine is mainly used for bending parts such as plates and pipe fittings, and the application of narrow plate parts needing bending in various fields is very wide. At present, the bending forming of narrow plate parts mainly comprises the following modes.

When the conventional simmer bending machine bends profile steel, because the profile steel is H-shaped or special-shaped, when the outer wall of the profile steel deforms, special-shaped parts can be mutually extruded when the outer wall of the profile steel deforms, so that the bent part of the profile steel is easy to be irregular in the bending process of the profile steel;

meanwhile, when the existing equipment is used for bending different section steels, a large amount of adjustment time is needed, and the processing efficiency of the equipment is reduced.

Therefore, a section steel simmer bending machine is provided to solve the problems.

Disclosure of Invention

The invention aims to provide a section steel simmer bending machine, which aims to solve the problem that when the outer wall of the section steel proposed in the background art is deformed, the deformed parts can be mutually extruded when the outer wall is deformed, so that the bent parts of the section steel are easy to be irregular in the bending process of the section steel.

In order to achieve the purpose, the invention provides the following technical scheme:

the section steel bending machine comprises a base, a console and a bending assembly, wherein the console is arranged above the base;

the clamping assembly is arranged above the base;

wherein, crooked subassembly is including fixed frame and removal frame, the inside of fixed frame and removal frame all is provided with spacing subassembly, and the top of fixed frame and removal frame is provided with the motor, spacing subassembly includes the fixed column, the upper end of fixed column and the output fixed connection of motor, the outside cover of fixed column is equipped with four limiting plates, the inside of fixed column is provided with multistage telescoping cylinder, four the inboard of limiting plate is provided with the dead lever, four every grade of output fixed connection of dead lever one end and multistage telescoping cylinder, the air cavity has been seted up to the inside of limiting plate, the one end of air cavity is provided with the top frame, and the inside of air cavity is provided with the air film, and the air film simultaneously is provided with pressure sensor, the one side that the air film is close to pressure sensor is provided with the trigger block.

In a further embodiment, one side of the moving frame is provided with a hydraulic cylinder, the two fixed frames are arranged, and the two fixed frames are symmetrically distributed about the center line of the moving frame.

In a further embodiment, the centre gripping subassembly includes four posting, posting and fixed frame and removal frame cross distribution, the upper end of posting is provided with two dwangs, the outside slip of dwang is provided with removes seat one and removes seat two, the outer wall rotation that removes seat one and remove seat two is provided with compression roller one and compression roller two, the outer wall that removes seat one and remove seat two is provided with fastening components.

In a further embodiment, fastening component includes the footstock and removes the spacing seat of seat, the outside of footstock is cylindrical, and the footstock rotates the inside that sets up at removal seat one or removal seat two, the outer wall of footstock is seted up threadedly, the central point of footstock seted up with dwang profile shape assorted through-hole, the flexible setting of the spacing seat of removal seat is in the side of removing seat one or removing seat two, the one end of removing the spacing seat of seat is connected with the threaded rod, the threaded rod passes through threaded engagement with the footstock.

In a further embodiment, the inner side of the positioning frame is provided with evenly distributed anti-slip strips, and the anti-slip strips are distributed on the moving path of the moving seat limiting seat.

In a further embodiment, the outer wall of the rotating rod is provided with a strip-shaped bulge, a first spring and a second spring are sleeved outside the rotating rod, and the adjacent ends of the first spring and the second spring are fixedly connected with the upper end and the lower end of the first moving seat and the second moving seat.

In a further embodiment, the control console adopts a PLC control device, and the control console is electrically connected with the hydraulic cylinder and the motor.

In a further embodiment, two sides of the positioning frame are provided with side plates, and the side plates are arranged on the outer sides of the first movable seat and the second movable seat.

In a further embodiment, the inboard of fixed frame is provided with supporting component, supporting component includes the work piece backup pad, the lower extreme of work piece backup pad is provided with a plurality of gag lever post, the gag lever post passes the bottom of fixed frame, the below central point of work piece backup pad articulates there is the push rod, the push rod is kept away from the one end of work piece backup pad and is articulated to have drive assembly.

In a further embodiment, the transmission assembly comprises a reciprocating screw rod, a sliding groove for accommodating the reciprocating screw rod is formed in the bottom of the fixing frame, the reciprocating screw rod is connected with a sliding sleeve through threads, the outer wall of the sliding sleeve is hinged to one end of the push rod, one end, far away from the sliding sleeve, of the reciprocating screw rod is connected with a ratchet assembly, a ratchet wheel in the ratchet assembly is connected with a second conical tooth, a pawl in the ratchet assembly is rotatably arranged in a groove in one end of the reciprocating screw rod, the first conical tooth is meshed with the second conical tooth, and the first conical tooth is fixedly connected with the lower end of the fixing column.

The invention provides a section steel bending machine through improvement, compared with the prior art, the section steel bending machine has the following improvements and advantages:

one is as follows: the limiting assembly is arranged in the steel section bending device, can be arranged according to the external protrusion of the steel section, can limit the bending part of the steel section, can reduce the unevenness of the bending part of the steel section, and improves the processing quality;

the second step is as follows: the pressure sensor is arranged in the limiting assembly, the pressure sensor can monitor the deformed part of the profile steel through the top frame, when the profile steel is greatly uneven, the top frame can be extruded by the uneven part of the profile steel, the top frame can extrude air in the air cavity, the air film in the air cavity can trigger the pressure sensor, the pressure sensor can transmit a signal into the control console, the device is controlled by the control console to stop working, the situation that the profile steel is continuously processed when the profile steel is greatly uneven is avoided, a worker can be reminded of adjusting the profile steel in time, and the working efficiency is improved;

and thirdly: the limiting assembly can be suitable for profile steels with different shapes, so that the profile steels with various types can be bent, and the processing application range of the device is enlarged;

fourthly, the method comprises the following steps: the clamping assembly can adjust the height, so that the clamping assembly can adjust the height according to the section steel with different strand thicknesses, the section steel with different thicknesses can be limited, and the clamping application range of the device is widened.

Drawings

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

FIG. 2 is a front view of the present invention;

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

FIG. 4 is a schematic view of the spacing assembly of the present invention;

FIG. 5 is a cross-sectional view of the spacing assembly of the present invention;

FIG. 6 is a schematic view of the clamping assembly of the present invention;

FIG. 7 is a schematic view of a structure of the mobile station of the present invention;

FIG. 8 is an enlarged schematic view of the invention at A in FIG. 5;

FIG. 9 is an enlarged view of the structure of FIG. 7 at B;

figure 10 is a schematic view of the structure of the fixed frame of the invention;

figure 11 is a side view of the fixed frame of the present invention;

fig. 12 is an enlarged view of the structure of fig. 11 at C according to the present invention.

Description of the reference numerals: 1. the device comprises a base, 2, a console, 3, a hydraulic cylinder, 4, a fixed frame, 5, a movable frame, 6, a motor, 7, a limiting component, 701, a fixed column, 702, a multi-stage telescopic cylinder, 703, a limiting plate, 704, a top frame, 705, an air cavity, 706, an air film, 707, a pressure sensor, 8, a positioning frame, 9, a rotating rod, 10, a first compression roller, 11, a second compression roller, 12, a side plate, 13, a first spring, 14, a first movable seat, 15, a second movable seat, 16, a second spring, 17, an anti-slip strip, 18, a top seat, 19, a limiting seat of the movable seat, 20, a threaded rod, 21, a first conical tooth, 22, a workpiece supporting plate, 23, a second conical tooth, 24, a limiting rod, 25, a push rod, 26, a reciprocating screw rod, 27 and a ratchet component.

Detailed Description

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

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

Referring to fig. 1 to 12, in an embodiment of the present invention, a structural steel bending machine includes a base 1, a console 2 disposed above the base 1, and a bending assembly disposed above the base 1;

the clamping component is arranged above the base 1;

wherein, crooked subassembly includes fixed frame 4 and removal frame 5, the inside of fixed frame 4 and removal frame 5 all is provided with spacing subassembly 7, the top of fixed frame 4 and removal frame 5 is provided with motor 6, spacing subassembly 7 includes fixed column 701, the upper end of fixed column 701 and the output fixed connection of motor 6, the outside cover of fixed column 701 is equipped with four limiting plates 703, the inside of fixed column 701 is provided with multistage telescoping cylinder 702, the inboard of four limiting plates 703 is provided with the dead lever, four dead lever one end and multistage telescoping cylinder 702 every grade output fixed connection, air cavity 705 has been seted up to the inside of limiting plate 703, the one end of air cavity 705 is provided with top frame 704, the inside of air cavity 705 is provided with air film 706, and air film 706 one side is provided with pressure sensor 707, the one side that air film 706 is close to pressure sensor 707 is provided with the trigger block.

The centre gripping subassembly is used for the positioning work of shaped steel, position restriction with shaped steel through the centre gripping subassembly, and the bending work of crooked subassembly mainly used shaped steel, wherein motor 6 can drive fixed column 701 and rotate, the inside multistage telescoping cylinder 702 of fixed column 701 can drive limiting plate 703 and expand, then limiting plate 703 can live the outside restriction of shaped steel, when limiting plate 703 receives the extrusion on the surface of shaped steel simultaneously, limiting plate 703 can extrude air cavity 705 is inside, air film 706 can receive the extrusion, then air film 706 can trigger pressure sensor 707, can monitor the crooked process of shaped steel like this, the quality of production is improved.

Preferably, the hydraulic cylinder 3 is provided on one side of the moving frame 5, two fixed frames 4 are provided, and the two fixed frames 4 are symmetrically distributed about the center line of the moving frame 5.

The hydraulic cylinder 3 is used for pushing the movable frame 5 to work, so that the limiting assembly 7 in the movable frame 5 extrudes the section steel, and the section steel is bent.

Preferably, the clamping assembly comprises four positioning frames 8, the positioning frames 8 are distributed with the fixed frame 4 and the movable frame 5 in a crossed manner, two rotating rods 9 are arranged at the upper ends of the positioning frames 8, a first movable seat 14 and a second movable seat 15 are arranged outside the rotating rods 9 in a sliding manner, a first compression roller 10 and a second compression roller 11 are arranged on the outer walls of the first movable seat 14 and the second movable seat 15 in a rotating manner, and fastening assemblies are arranged on the outer walls of the first movable seat 14 and the second movable seat 15.

The centre gripping subassembly is used for the spacing work of shaped steel, wherein remove one 14 and remove two 15 can slide on dwang 9 of seat, it can adjust with the distance between two 11 of compression roller on two 15 of removal seat to remove one 14 like this, one 10 of compression roller and two 11 of compression roller can be adjusted according to the thickness of shaped steel, the person of facilitating the use sets up, fastening assembly is used for removing one 14 of seat and the fixed work of removing two 15 of seat simultaneously, can be with the rigidity of one 10 of compression roller and two 11 of compression roller, make one 10 of compression roller and two 11 of compression roller can carry out spacing work to shaped steel.

Preferably, the fastening component comprises a top seat 18 and a movable seat limiting seat 19, the outside of the top seat 18 is cylindrical, the top seat 18 is rotatably arranged inside the movable seat I14 or the movable seat II 15, the outer wall of the top seat 18 is provided with threads, the central part of the top seat 18 is provided with a through hole matched with the section shape of the rotating rod 9, the movable seat limiting seat 19 is telescopically arranged on the side surface of the movable seat I14 or the movable seat II 15, one end of the movable seat limiting seat 19 is connected with a threaded rod 20, and the threaded rod 20 is in threaded engagement with the top seat 18.

The footstock 18 can be established in the outside of dwang 9, and when the footstock 18 rotated along with dwang 9 simultaneously, the footstock 18 can drive threaded rod 20 and rotate, and threaded rod 20 can promote to remove the spacing seat 19 of seat and remove, and the one end of removing the spacing seat 19 of seat can push up on the inner wall of locating frame 8, will remove one 14 or remove the position of two 15 of seat and fix.

Preferably, the inner side of the positioning frame 8 is provided with evenly distributed anti-slip strips 17, and the anti-slip strips 17 are distributed on the moving path of the moving seat limiting seat 19.

The inboard of locating frame 8 is provided with antislip strip 17, and antislip strip 17 adopts the rubber material, and deformation can take place after partial antislip strip 17 receives the extrusion, and other antislip strips 17 can stop moving the spacing seat 19 outside restriction of seat simultaneously, increase the fixed effect of moving the spacing seat 19 of seat through antislip strip 17, prevent to remove the spacing seat 19 condition that appears gliding.

Preferably, the outer wall of the rotating rod 9 is provided with a strip-shaped bulge, the outer part of the rotating rod 9 is sleeved with a first spring 13 and a second spring 16, and the adjacent ends of the first spring 13 and the second spring 16 are fixedly connected with the upper end and the lower end of the first moving seat 14 and the second moving seat 15.

The outside of dwang 9 is provided with the bar arch, and dwang 9 drives footstock 18 when the pivoted and rotates.

Preferably, the control console 2 adopts a PLC control device, and the control console 2 is electrically connected with the hydraulic cylinder 3 and the motor 6.

Preferably, the positioning frame 8 is provided with side plates 12 at both sides thereof, and the side plates 12 are disposed outside the first movable base 14 and the second movable base 15.

The side plate 12 is used for protecting the first movable seat 14 and the second movable seat 15, and avoiding the deformation of the first movable seat 14 and the second movable seat 15 caused by the extrusion of other objects.

Preferably, the inboard of fixed frame 4 is provided with supporting component, and supporting component includes work piece backup pad 22, and the lower extreme of work piece backup pad 22 is provided with a plurality of gag lever post 24, and gag lever post 24 passes the bottom of fixed frame 4, and the below central point of work piece backup pad 22 articulates there is push rod 25, and the one end that work piece backup pad 22 was kept away from to push rod 25 articulates there is transmission assembly.

The supporting component is used for supporting the effect of shaped steel, and transmission assembly can be connected with fixed column 701 simultaneously, can drive the one end of push rod 25 through transmission assembly and move when reverse rotation, and the other end of push rod 25 can promote work piece supporting plate 22 and reciprocate, and work piece supporting plate 22 passes through the route of the fixed removal of gag lever post 24, and work piece supporting plate 22 can not appear crooked condition reciprocating like this.

Preferably, the transmission assembly comprises a reciprocating screw rod 26, a sliding groove for accommodating the reciprocating screw rod 26 is formed in the bottom of the fixing frame 4, the reciprocating screw rod 26 is connected with a sliding sleeve through threads, the outer wall of the sliding sleeve is hinged to one end of the push rod 25, one end, far away from the sliding sleeve, of the reciprocating screw rod 26 is connected with a ratchet assembly 27, a ratchet in the ratchet assembly 27 is connected with a second conical tooth 23, a pawl in the ratchet assembly 27 is rotatably arranged in a groove in one end of the reciprocating screw rod 26, the second conical tooth 23 is meshed with a first conical tooth 21, and the first conical tooth 21 is fixedly connected with the lower end of the fixing column 701.

When the fixing column 701 rotates forwards, the section steel can be driven to convey, when the fixing column 701 rotates backwards, the ratchet wheel assembly 27 can drive the reciprocating screw rod 26 to rotate, the reciprocating screw rod 26 can drive the sliding sleeve to move, the sliding sleeve can drive one end of the push rod 25 to move, the other end of the push rod 25 can drive the workpiece supporting plate 22 to move up and down, the height of the workpiece supporting plate 22 is adjusted, and the lower portion of the section steel is supported by the workpiece supporting plate 22.

The working principle is as follows: when the device is used, the section steel to be bent passes through a first compression roller 10 and a second compression roller 11 in a clamping assembly, the first compression roller 10 and the second compression roller 11 can be pressed on the surface of the section steel under the action of a first spring 13 and a second spring 16, then a rotating rod 9 is rotated, the rotating rod 9 can drive a threaded rod 20 to rotate through a top seat 18, then the threaded rod 20 pushes a movable seat limiting seat 19 towards the direction of an anti-slip strip 17, thus a movable seat 14 or a movable seat two 15 is pushed against through the movable seat limiting seat 19, the positions of the first compression roller 10 and the second compression roller 11 are fixed, the section steel passes through a limiting assembly 7, then a multistage telescopic cylinder 702 is started, a limiting plate 703 is driven to move through the multistage telescopic cylinder 702, the section steel is limited through the limiting plate 703, after the section steel is set, a hydraulic cylinder 3 is started, the hydraulic cylinder 3 pushes a movable frame 5 to move, then the movable frame 5 pushes the limiting component 7 on the inner side to extrude the section steel, then the motor 6 is started, the fixed column 701 and the limiting plate 703 are driven to rotate by the motor 6, the fixed column 701 and the limiting plate 703 drive the section steel to move by friction when rotating, when the section steel passes through the movable frame 5, the section steel is bent by the limiting component 7 on the inner side of the movable frame 5, meanwhile, the limiting plate 703 in the limiting component 7 limits the special-shaped part of the section steel, the condition that the special-shaped surface of the section steel is greatly uneven is avoided, meanwhile, the top frame 704 on one side of the limiting plate 703 can be attached to the curved surface of the section steel, if the surface of the section steel is uneven when bending, the uneven section steel part can extrude the top frame 704, the top frame 704 extrudes the air inside the air cavity 705, then the air pressure inside the air cavity 705 can extrude the air film 706, the air film 706 is deformed to trigger the pressure sensor 707, the pressure sensor 707 transmits data to the console 2, and if the data exceeds a predetermined value of the console 2, the console 2 controls the equipment to stop working, so that a worker can readjust the equipment.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.

Claims

1. The utility model provides a shaped steel bending machine, includes base (1), base (1) top is provided with control cabinet (2), its characterized in that: the bending device also comprises a bending component, wherein the bending component is arranged above the base (1);

the clamping component is arranged above the base (1);

the bending assembly comprises a fixing frame (4) and a moving frame (5), wherein a limiting assembly (7) is arranged inside the fixing frame (4) and the moving frame (5), a motor (6) is arranged above the fixing frame (4) and the moving frame (5), the limiting assembly (7) comprises a fixing column (701), the upper end of the fixing column (701) is fixedly connected with the output end of the motor (6), four limiting plates (703) are sleeved outside the fixing column (701), a multi-stage telescopic cylinder (702) is arranged inside the fixing column (701), fixing rods are arranged on the inner sides of the limiting plates (703), one ends of the fixing rods are fixedly connected with each stage of output end of the multi-stage telescopic cylinder (702), an air cavity (704) is formed inside the limiting plates (703), a top frame (704) is arranged at one end of the air cavity (705), an air film (706) is arranged inside the air cavity (705), a pressure sensor (707) is arranged on one side of the air film (706), and a trigger block is arranged on one side of the air film (706).

2. The structural steel bending machine according to claim 1, wherein: one side of removing frame (5) is provided with pneumatic cylinder (3), fixed frame (4) are provided with two altogether, two fixed frame (4) are about the central line symmetric distribution that removes frame (5).

3. A section steel bending machine according to claim 1, characterized in that: the centre gripping subassembly includes four posting (8), posting (8) and fixed frame (4) and removal frame (5) cross distribution, the upper end of posting (8) is provided with two dwang (9), the outside slip of dwang (9) is provided with removes seat one (14) and removes seat two (15), the outer wall of removing seat one (14) and removing seat two (15) rotates and is provided with compression roller one (10) and compression roller two (11), the outer wall of removing seat one (14) and removing seat two (15) is provided with fastening components.

4. A section steel bending machine according to claim 3, characterized in that: the fastening component comprises a top seat (18) and a movable seat limiting seat (19), the outer part of the top seat (18) is cylindrical, the top seat (18) is rotated to be arranged inside the movable seat I (14) or the movable seat II (15), the outer wall of the top seat (18) is provided with threads, the central part of the top seat (18) is provided with a through hole matched with the profile shape of a rotating rod (9), the movable seat limiting seat (19) is arranged on the side surface of the movable seat I (14) or the movable seat II (15) in a telescopic mode, one end of the movable seat limiting seat (19) is connected with a threaded rod (20), and the threaded rod (20) is meshed with the top seat (18) through threads.

5. A section steel bending machine according to claim 3, characterized in that: the inner side of the positioning frame (8) is provided with anti-slip strips (17) which are uniformly distributed, and the anti-slip strips (17) are distributed on the moving path of the moving seat limiting seat (19).

6. A section steel bending machine according to claim 4, characterized in that: the outer wall of dwang (9) is provided with the arch of bar, the outside cover of dwang (9) is equipped with spring (13) and spring two (16), the adjacent end of spring (13) and spring two (16) with remove seat one (14) and remove seat two (15) upper and lower end fixed connection.

7. A section steel bending machine according to claim 1, characterized in that: the control console (2) adopts a PLC control device, and the control console (2) is electrically connected with the hydraulic cylinder (3) and the motor (6).

8. A section steel bending machine according to claim 5, characterized in that: and side plates (12) are arranged on two sides of the positioning frame (8), and the side plates (12) are arranged on the outer sides of the first movable seat (14) and the second movable seat (15).

9. A section steel bending machine according to claim 3, characterized in that: the inboard of fixed frame (4) is provided with supporting component, supporting component includes work piece backup pad (22), the lower extreme of work piece backup pad (22) is provided with a plurality of gag lever post (24), the bottom of fixed frame (4) is passed in gag lever post (24), the below central point of work piece backup pad (22) articulates there is push rod (25), the one end that work piece backup pad (22) was kept away from in push rod (25) articulates there is transmission assembly.

10. A section steel bending machine according to claim 9, characterized in that: the transmission assembly comprises a reciprocating screw rod (26), a sliding groove for accommodating the reciprocating screw rod (26) is formed in the bottom of the fixing frame (4), the reciprocating screw rod (26) is connected with a sliding sleeve through threads, the outer wall of the sliding sleeve is hinged to one end of a push rod (25), one end, away from the sliding sleeve, of the reciprocating screw rod (26) is connected with a ratchet assembly (27), a ratchet wheel in the ratchet assembly (27) is connected with a second conical tooth (23), a pawl in the ratchet assembly (27) is rotatably arranged in a groove in one end of the reciprocating screw rod (26), the second conical tooth (23) is meshed with a first conical tooth (21), and the first conical tooth (21) is fixedly connected with the lower end of the fixing column (701).