CN110681744A - Section bar bending device - Google Patents

Abstract

A profile bending device comprises a bottom plate, wherein a profile placing assembly, a positioning assembly bending assembly and a limiting assembly are arranged on the bottom plate, the profile placing assembly comprises a profile placing seat, an upper base plate and a lower base plate are arranged on the profile placing seat, and a flat profile placing cavity is formed between the upper base plate and the lower base plate; the positioning assembly comprises a positioning frame arranged on the bottom plate, and a first lower pressing piece is arranged on the positioning frame; the bending assembly comprises a rotatable rotating frame, and a stress piece which is acted with the power piece is arranged on the rotating frame; and a second lower pressing piece is further arranged on the rotating frame. The invention provides a profile bending device, which is firm in fixing and supporting a profile, so that the profile is rarely deformed in the bending process, and meanwhile, the phenomenon that the profile is cracked in the bending process is greatly reduced by improving an upper gasket or a pressing block, so that the bending quality of the profile is high; the bending device in the application has the advantages of accurate and stable positioning, high bending precision and good product quality.

Description

Section bar bending device

Technical Field

The invention belongs to the technical field of section bar processing, and particularly relates to a section bar bending device.

Background

The metal section is a solid or hollow straight bar which is formed by plastic processing and has a certain section shape and size, and the section has various types and specifications and wide application and plays a very important role in rolling production. Meanwhile, the aluminum alloy is a non-ferrous metal structural material which is most widely applied in industry, and has a great amount of application in aviation, aerospace, automobile, mechanical manufacturing, ships and chemical industry, and the aluminum alloy is the most applied alloy material at present.

Aluminum alloy sections are generally linear structures, and further processing, such as bending and the like, is required when the aluminum alloy sections are applied to specific product structures. There are some section bar equipment of buckling among the prior art, for example, in the chinese utility model patent that publication number is CN 208288720U, disclosed a device of bending of aluminum alloy straight beam, including being fixed in the straight beam rack on the workstation, locating the drive structure of briquetting, the drive briquetting work under the lower briquetting on straight beam rack upper portion, this device of bending has changed in the past that equipment is bulky, with high costs shortcoming, simple structure, convenient operation, and processing high accuracy is high, and is with low costs. For another example, in the chinese utility model patent of publication No. CN206527191U, an aluminium alloy bending machine is disclosed, relate to aluminium alloy manufacturing technical field, the heater is installed to the inside front end of frame, the rear side of heater is provided with the cleaning wheel, the rear side of cleaning wheel is provided with shearing mechanism, shearing mechanism's rear side is provided with the leading wheel, still include compression roller mechanism, radiator, grinding mechanism, turn to piece, motor gear system etc. this bending machine is convenient for realize quick, the steady type drive is bent, and is easy and simple to handle, and is efficient, and can clean, can increase of service life.

Some section bar bending equipment among the prior art can better realization bending operation to specific some section bars. The applicant finds that, in the long-term workshop use process, for some flat hollow sections, a defective product is easily generated during bending operation, such as the same R degree difference of a bending part, the sections are easy to dent or bulge, the sections are easy to have thin-wall cracks, and the like.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the profile bending device, which has the advantages that the profile is firmly positioned, the profile cannot be concave or convex in the bending process, the bending radius of the bending structure is good in uniformity, the processing precision is high, and the product quality is good.

In order to solve the above technical problems, the present invention is solved by the following technical solutions.

The utility model provides a section bar bending apparatus, includes the bottom plate, it places subassembly, locating component, crooked subassembly, spacing subassembly to be equipped with the section bar on the bottom plate, wherein: the section placing assembly comprises a section placing seat, an upper base plate and a lower base plate are arranged on the section placing seat, and a flat section placing cavity is formed between the upper base plate and the lower base plate; the section bar placing assembly further comprises an inner cushion block plugged into the inner cavity of the section bar. In the structure, a section placing cavity is formed by an upper cushion plate and a lower cushion plate, a section to be bent is clamped in the cavity, and the outer surface of the section is always attached to the upper cushion plate and the lower cushion plate in the bending process to provide pressing force, so that the surface of the section does not protrude outwards; simultaneously, in this structure, interior cushion inserts in the section bar inner chamber, and the preferred shape of interior cushion matches the laminating with the section bar inner chamber, provides the holding power, guarantees that crooked in-process section bar can not the indent, guarantees the quality of crooked back product. The section bar placing seat is fixed on the bottom plate, a placing cavity is arranged on the section bar placing seat, and the upper backing plate and the lower backing plate are arranged in the placing cavity. In the structure, the width of the placing cavity is the same as the width of the upper backing plate and the lower backing plate, so that displacement deviation in the width direction can not occur in the bending process, and the bending quality is ensured.

The positioning assembly comprises a positioning frame arranged on the bottom plate, a first lower pressing piece is arranged on the positioning frame, and the first lower pressing piece presses the upper base plate to ensure the pressing force, so that the sectional material cannot deform in the bending process; the positioning assembly further comprises a power part arranged on the positioning frame, and the power part pushes the bending assembly to rotate. In the structure, the first lower pressing piece has a good pressing effect on the surface of the section; meanwhile, the power part drives the rotating frame to rotate in the process of pushing the rotating frame, and the bending operation of the molding material is finished. In the positioning assembly, the power part is an air cylinder or a hydraulic cylinder, the power part is arranged in a rotating seat, and the rotating seat is rotatably arranged in a positioning frame through rotating shafts on two sides of the rotating seat; the end part of the telescopic shaft on the power part is connected into the stress part on the rotating frame. In the structure, the power part can generate position posture change in the process of pushing the rotating frame to rotate, so that the power part is arranged on the rotating seat, the power part can rotate flexibly, and the phenomenon of clamping cannot occur.

The bending assembly comprises a rotatable rotating frame, and a stress piece which is acted with the power piece is arranged on the rotating frame; and a second lower pressing piece is further arranged on the rotating frame and pressed on the upper base plate. The bending assembly further comprises a bending base rotatably arranged on the section bar placing seat, the bending base is arranged below the lower base plate, an extension platform is arranged on the bending base, and the extension platform abuts against the lower portion of the lower base plate; the rotating frame and the bending base rotate coaxially; and the second lower pressing piece and the bent base are oppositely arranged up and down and clamped on the upper side and the lower side of the base plate. In the structure, the second lower pressing piece and the bending base clamp the section bar to be bent and the upper and lower backing plates, wherein the upper and lower backing plates are made of bendable materials, such as rubber and elastic plastic stools. When the section bar is bent, the rotating frame rotates, the second pressing piece on the rotating frame and the bending base synchronously rotate at the same time, the rotating angular speed is the same, and the section bar is bent. Meanwhile, the bending base and the extension platform play a good supporting role on the lower part of the section bar, so that the surface of the section bar cannot deform during bending operation, and the bending quality is high.

The limiting assembly comprises a positioning seat fixed on the bottom plate, a positioning plate is arranged on the positioning seat, a positioning ejector rod with adjustable length is arranged on the positioning plate, and the bending assembly rotates and then abuts against the limiting assembly to achieve limiting, so that the precision and the identity of each bending operation are guaranteed. In this structure, through the height of adjusting the location ejector pin, can obtain different positioning height, can obtain the crooked of different radians, adapt to the demand of different crooked processing.

In a preferred embodiment, in the profile placing assembly, a curved base placing cavity is arranged on the profile placing seat, and the curved base is placed in the curved base placing cavity. The bending base placing cavity is preferably an open cylindrical cavity, so that the bending base is convenient to rotate, and the bending base placing cavity also has a good limiting effect and can prevent the bending base from vibrating and deviating.

In a preferred embodiment, in the profile-laying assembly, the upper mat comprises a first upper mat and a second upper mat separated or broken, the first lower pressing member pressing on the first upper mat and the second lower pressing member pressing on the second upper mat. The flat section bar is at the bending process, and a certain amount of drawing or displacement can take place for section bar itself, and at this moment, if the upper padding plate is a slice overall structure, first casting die and second casting die are dead with the upper padding plate pressure completely, and this displacement volume, the tractive force that can make the section bar in-process of bending can not clear up, and under heavily pressing, can take place the displacement between section bar and the upper padding plate, or the crack can appear in the section bar, the crooked quality of image. Therefore, in this application, cut apart into first upper padding plate and second upper padding plate with the upper padding plate, press by first casting die and second casting die respectively, in bending process, along with the drawing and dragging of section bar, the interval between first upper padding plate and the second upper padding plate can grow slightly, is used for offsetting the tensile volume and the power of dragging of section bar, has avoided the appearance of crackle or thin wall structure on the section bar, makes the section bar high quality after the bending.

In a preferred embodiment, in the positioning assembly, the lower end of the first lower pressing member is pressed against a first pressing plate by a first pressing block, and the first pressing plate is pressed against the upper backing plate. In the structure, the first pressing plate and the first pressing plate can be adjusted as required to adapt to different section bar structures.

In a preferred embodiment, in the positioning assembly, the first pressing block and the first pressing plate are relatively movable, and specifically, the first pressing block and the first pressing plate may be in sliding contact, or provided with balls in rolling contact. This structure makes, the crooked in-process of section bar can produce certain drawing and dragging, and under the effect of the power of dragging, first clamp plate can remove to crooked direction slightly this moment for offset the tensile volume and the power of dragging of section bar, avoided the appearance of crackle or thin wall structure on the section bar, make the section bar high quality after the bending.

In a preferred embodiment, in the bending assembly, the force-receiving member is pivotally connected to the telescopic shaft of the power member, and specifically, the force-receiving member is rotatably connected to an end of the telescopic shaft, so that the force-receiving member can rotate flexibly and is not jammed.

In a preferred embodiment, in the bending component, a second pressing block is arranged on the second pressing piece and presses the second pressing piece; a second pressing plate is arranged at the lower part of the second lower pressing piece and presses the upper backing plate; the second pressing plate is replaceable, and different shapes, sizes and thicknesses can be selected according to requirements, so that the bending operation of different profiles is adapted.

In a preferred embodiment, in the bending assembly, the lower part of the second pressing piece is in arc surface contact with the second pressing plate, so that the stress stability and the bending quality of the section bar are ensured in the rotating process.

In a preferred embodiment, in the bending assembly, the rotating frame is rotatably arranged on the base, and two sides of the bending base are fixed on the rotating frame and rotate coaxially with the rotating frame, so that the bending operation is smooth, and the bending quality of the section is high.

In a preferred embodiment, in the bending assembly, a side plate of the rotating frame is provided with a guide limiting hole, and two sides of the second pressing piece are provided with a guide convex column arranged in the guide limiting hole. This structure guarantees that the rotating frame can not take place extra displacement and the bias at the rotation in-process, second pushing down the piece.

In a preferred embodiment, in the bending assembly, the extension platform on the bending base is arranged towards the rotating direction, so that a good supporting force can be provided, the section only has a radian at the bending structure, the outside of the bending structure is in a straight posture, and the product quality is high.

In a preferred embodiment, the bottom plate is provided with a notch, and the notch is arranged below the downward bending position and used for accommodating the bent section.

Compared with the prior art, the invention has the following beneficial effects: the profile bending device is provided, the profile is firmly fixed and supported, the profile is rarely deformed in the bending process, and the phenomenon that the profile cracks in the bending process is greatly reduced by improving the upper gasket or the pressing block, so that the bending quality of the profile is high; the bending device in the application has the advantages of accurate and stable positioning, high bending precision and good product quality.

Drawings

Fig. 1 is a front view of a profile bending device in the pre-bent state in the present application.

Fig. 2 is a perspective view of the profile bending apparatus in the pre-bending state in the present application.

Fig. 3 is an enlarged view of the area a in fig. 2.

Fig. 4 is a front view of the profile bending device in a bent state in the present application.

Fig. 5 is a perspective view of the profile bending apparatus in a bent state in the present application.

Fig. 6 is an enlarged view of the region B in fig. 5.

Fig. 7 is a cross-sectional view of the profile bending apparatus in the pre-bending state in the present application.

Fig. 8 is a sectional view of the profile bending apparatus in a bent state in the present application.

Fig. 9 is a first perspective view of the profile bending apparatus in a pre-bending state, in which a partial structure is omitted in the present application.

Fig. 10 is a second perspective view of the profile bending apparatus in a pre-bending state, in which a partial structure is omitted in the present application.

Fig. 11 is a perspective view of the profile bending apparatus in a bent state, in which a partial structure is omitted in the present application.

Fig. 12 is a cross-sectional view of a profile bending apparatus in a pre-bending state in another embodiment.

Fig. 13 is a first perspective view of the first profile holder of the present application.

Fig. 14 is a second perspective view of the sectional material seat in the present application.

Fig. 15 is a perspective view of a curved base in the present application.

Fig. 16 is a perspective view of an inner spacer in the present application.

Fig. 17 is a perspective view of the profile of the present application before bending.

Fig. 18 is a perspective view of a bent profile in the present application.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiments described below by referring to the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout, are exemplary only for explaining the present invention, and are not construed as limiting the present invention.

In describing the present invention, it is to be understood that the terms: the terms center, longitudinal, lateral, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, 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 shown. In describing the present invention, unless otherwise expressly specified or limited, the terms: mounting, connecting, etc. should be understood broadly, and those skilled in the art will understand the specific meaning of the terms in this application as they pertain to the particular situation.

Referring to fig. 1 to 18, the profile bending apparatus according to the present invention includes a base plate 11, wherein a profile placing assembly, a positioning assembly and a bending assembly are disposed on the base plate 11, and the specific structure is as follows.

The section placing assembly comprises a section placing seat 6, wherein an upper backing plate 81 and a lower backing plate 82 are arranged on the section placing seat 6, and a flat section placing cavity is formed between the upper backing plate 81 and the lower backing plate 82; the profile placement assembly also comprises an inner pad 7 which is inserted into the inner cavity of the profile. In the structure, a section placing cavity is formed by an upper backing plate 81 and a lower backing plate 82, a section to be bent is clamped in the cavity, and the outer surface of the section is always attached to the upper backing plate 81 and the lower backing plate 82 in the bending process to provide pressing force, so that the surface of the section is not protruded outwards; simultaneously, in this structure, interior cushion 7 inserts in the section bar inner chamber, and interior cushion 7's shape preferred matches the laminating with the section bar inner chamber, provides the holding power, guarantees that the bending in-process section bar can not the indent, guarantees the quality of crooked back product.

In addition, in the section bar placing assembly, the section bar placing seat 6 is fixed on the bottom plate 11, a placing cavity 67 is arranged on the section bar placing seat 6, and an upper cushion plate 81 and a lower cushion plate 82 are arranged in the placing cavity 67. In this structure, the width of placing chamber 67 is the same with the width of upper and lower backing plate, guarantees the crooked in-process, can not take place the displacement deflection on the width direction, guarantees crooked quality. Specifically, the profile placing seat 6 is provided with a curved base placing cavity 66, and the curved base 61 is placed in the curved base placing cavity. The bending base placing cavity 66 is preferably an open cylindrical cavity, so that the bending base 61 can rotate conveniently, and the bending base placing cavity also has a good limiting effect and can prevent the bending base 61 from vibrating and deviating.

In another embodiment of the present application, as shown in fig. 12, in the profile setting assembly, the upper plate 81 comprises a first upper plate 811 and a second upper plate 812 which are separated or broken, the first lower pressing member 25 presses on the first upper plate 811, and the second lower pressing member 31 presses on the second upper plate 812. In the bending process of the flat section bar, a certain amount of stretching or displacement can occur to the section bar, at the moment, if the upper backing plate 812 is of an integral structure, the first lower pressing piece and the second lower pressing piece completely press the upper backing plate 812, so that the displacement and the dragging force in the bending process of the section bar cannot be resolved, and under heavy pressure, the displacement can occur between the section bar and the upper backing plate 812, or the section bar can have cracks and has image bending quality. Therefore, in the present application, the upper cushion plate 81 is divided into the first upper cushion plate 811 and the second upper cushion plate 812, and the first lower pressing member 25 and the second lower pressing member 31 respectively press the upper cushion plate and the second upper cushion plate, so that the distance between the first upper cushion plate 811 and the second upper cushion plate 812 is slightly increased along with the stretching and pulling of the profile during the bending process, so as to offset the stretching amount and pulling force of the profile, avoid the occurrence of cracks or thin-walled structures on the profile, and improve the quality of the bent profile.

The positioning assembly comprises a positioning frame 2 arranged on the bottom plate 11, a first lower pressing piece 25 is arranged on the positioning frame 2, and the first lower pressing piece 25 is pressed on the upper backing plate 81 to ensure the pressing force so that the sectional material cannot deform in the bending process; the positioning assembly further comprises a power part 21 arranged on the positioning frame 2, and the power part 21 pushes the bending assembly to rotate. In the structure, the first lower pressing piece has a good pressing effect on the surface of the section; meanwhile, the power member 21 rotates the rotary frame 3 in the process of pushing the rotary frame 3, and the bending operation of the profile is completed.

In the positioning assembly of the present application, the lower end of the first lower pressing member 25 is pressed against the first pressing plate 26 by the first pressing block 251, and the first pressing plate 26 is pressed against the upper backing plate 81. In the structure, the first pressing plate 26 and the first pressing plate 26 can be adjusted according to requirements to adapt to different profile structures. In a preferred embodiment, the first pressing block 251 and the first pressing plate 26 are relatively movable, and specifically, the first pressing block 251 and the first pressing plate 26 may be in sliding contact, or provided with balls in rolling contact. This structure makes, the crooked in-process of section bar can produce certain drawing and dragging, and under the effect of the tractive power this moment, first clamp plate 26 can remove to crooked direction a little for offsetting the tensile volume and the tractive power of section bar, has avoided the appearance of crackle or thin wall structure on the section bar, makes the section bar high quality after the bending.

In the positioning assembly, the power part 21 is an air cylinder or a hydraulic cylinder, the power part 21 is arranged in the rotating seat 22, and the rotating seat 22 is rotatably arranged in the positioning frame 2 through rotating shafts 23 on two sides of the rotating seat; the end of the telescopic shaft 24 on the power member 21 is connected to the force receiving member 34 on the turret 3. In the structure, the power member 21 can generate position posture change in the process of pushing the rotating frame 3 to rotate, so that the power member 21 is arranged on the rotating seat 22, the rotation is flexible, and the phenomenon of clamping cannot occur.

The bending assembly comprises a rotatable rotating frame 3, and a stress piece 34 which is acted with the power piece 21 is arranged on the rotating frame 3; the rotating frame 3 is further provided with a second lower pressing member 31, and the second lower pressing member 31 presses on the upper backing plate 81. The bending assembly further comprises a bending base 61 rotatably arranged on the section placing seat 6, the bending base 61 is arranged below the lower base plate 82, an extending platform 612 is arranged on the bending base 61, and the extending platform 612 abuts against the lower portion of the lower base plate 82; the rotating frame 3 and the bending base 61 rotate coaxially; and the second lower pressing member 31 is arranged opposite to the curved base 61 up and down and clamped on the upper and lower sides of the backing plate. In this structure, the second pressing member 31 and the bending base 61 clamp the section bar to be bent and the upper and lower cushion plates made of a bendable material, such as rubber or an elastic plastic stool. The bending base 61 is fixed on the square mounting column on the rotating frame 3 through the square shaft holes 611 on both sides of the bending base, when the section bar is bent, the rotating frame 3 rotates, meanwhile, the second pressing piece 31 on the rotating frame rotates synchronously with the bending base 61, the rotating angular speed is the same, and the section bar is bent. Meanwhile, the bending base 61 and the extension platform 612 play a good supporting role on the lower part of the profile, and the surface of the profile cannot deform during bending operation. Specifically, the extension platform 612 on the bending base 61 is arranged towards the rotating direction, so that good supporting force can be provided, the section bar is only provided with a radian at the bending structure, the straight posture is arranged outside the bending structure, and the product quality is high.

Specifically, in the bending assembly of this application, the atress piece 34 and the telescopic shaft 24 pin joint on the power piece 21 specifically are that the end of atress piece 34 and telescopic shaft 24 rotates to be connected, makes it rotate in a flexible way, the phenomenon that can not appear blocking. In addition, in the bending assembly, a second pressing block 341 is arranged on the second pressing member 31, and the second pressing block 341 presses the second pressing member 31; a second pressing plate 32 is arranged at the lower part of the second lower pressing piece 31, and the second pressing plate 32 presses on the upper backing plate 81; the second pressing plate 32 is replaceable, and can be selected to have different shapes, sizes and thicknesses according to requirements, so that the bending operation of different profiles is adapted. The lower part of the second pressing piece 31 is in arc surface contact with the second pressing plate 32, so that stable stress and high bending quality of the section bar are ensured in the rotating process.

In the bending assembly of this application, the rotating turret 3 rotates and locates on base 4, the both sides of crooked base 61 are fixed on rotating turret 3, and rotate with the rotating turret 3 is coaxial, make the bending operation go on smoothly, and the section bar bending quality is high. A guide limiting hole 33 is formed in a side plate of the rotating frame 3, and guide convex columns arranged in the guide limiting hole 33 are arranged on two sides of the second pressing piece 31. This construction ensures that the second hold-down member 31 does not undergo additional displacement and deflection during rotation of the turret 3.

The bending device of the application is arranged on a bottom plate 11, and the bottom plate 11 is arranged on a rack 1. The bottom plate 11 is provided with a notch 12, and the notch 12 is arranged below the downward bending position and used for accommodating the bent section. The bottom plate 11 is further provided with a limiting assembly, and the bending assembly is abutted to the limiting assembly after rotating to achieve limiting, so that the precision and the identity of each bending operation are guaranteed. Specifically, the limiting assembly comprises a positioning seat 5 fixed on the bottom plate 11, a positioning plate 51 is arranged on the positioning seat 5, and a positioning ejector rod 52 with adjustable length is arranged on the positioning plate 51. In this structure, through the height of adjusting location ejector pin 52, can obtain different positioning height, can obtain the crooked of different radians, adapt to the demand of different bending processes.

The above is a schematic diagram of the section bending device in the present application, can well realize the bending operation of the section, has good positioning performance and high bending quality, and is particularly suitable for bending of flat hollow aluminum sections. First casting die 25, second casting die 31 down in this application can be for the hydraulic cylinder system of pushing down, also can be for the lower pressure structure of bolt location locking, can provide fine overdraft. The devices such as the air cylinder, the hydraulic cylinder and the like in the application are conventional structures in the prior art, and the connection mode and the switch control mode of the devices are also conventional technologies.

The specific bending steps in this application are as follows.

(1) Feeding: obtaining a straight section bar 9 needing to be bent, and inserting an inner cushion block 7 into a cavity of the section bar 9 to achieve the purpose of internal support; the profile 9 is then placed between the upper 81 and lower 82 pads and is placed in its entirety in the placing chamber 67, keeping the bending assembly in the vertical position.

(2) Positioning: the first pressing piece 25 and the second pressing piece 31 press the upper backing plate 81 through pressing blocks, and the section bars 9 are firmly positioned.

(3) Bending: the power part 21 works, the telescopic shaft 24 of the power part 21 pushes the bending assembly to rotate, the second pressing part 3 and the bending base 61 are driven to synchronously rotate in the rotating process of the bending assembly to complete the bending of the section bar 9, the bending force is uniform and stable in stress in the bending process, the supporting force is good, and the quality of the bending structure is high.

(4) Taking a workpiece: when the bending assembly is rotated to abut against the positioning rams 52, indicating that the bending operation is complete, the first hold-down member 25 and the second hold-down member 31 are released (e.g., the set screws on the first hold-down member 25 and the second hold-down member 31 are released), the bent profile 9 is removed, and the inner pad 7 is extracted therefrom, and the bending operation is complete.

The invention provides a profile bending device, which has the advantages that the profile is firmly fixed and supported, the profile is rarely deformed in the bending process, and the cracking of the profile in the bending process is greatly reduced by improving the upper gasket or the pressing block, so that the bending quality of the profile is high; the bending device in the application has the advantages of accurate and stable positioning, high bending precision and good product quality.

The scope of the present invention includes, but is not limited to, the above embodiments, and the present invention is defined by the appended claims, and any alterations, modifications, and improvements that may occur to those skilled in the art are all within the scope of the present invention.

Claims (10)

1. The utility model provides a section bar bending apparatus, includes bottom plate (11), be equipped with the section bar on bottom plate (11) and place subassembly, locating component, crooked subassembly, spacing subassembly, its characterized in that:

the sectional material placing assembly comprises a sectional material placing seat (6), wherein an upper cushion plate (81) and a lower cushion plate (82) are arranged on the sectional material placing seat (6), and a flat sectional material placing cavity is formed between the upper cushion plate (81) and the lower cushion plate (82); the profile placing assembly also comprises an inner cushion block (7) plugged into the inner cavity of the profile; the section placing seat (6) is fixed on the bottom plate (11), a placing cavity (67) is formed in the section placing seat (6), and an upper cushion plate (81) and a lower cushion plate (82) are placed in the placing cavity (67);

the positioning assembly comprises a positioning frame (2) arranged on the bottom plate (11), a first lower pressing piece (25) is arranged on the positioning frame (2), and the first lower pressing piece (25) is pressed on the upper backing plate (81); the positioning assembly further comprises a power piece (21) arranged on the positioning frame (2), and the power piece (21) pushes the bending assembly to rotate; the power part (21) is an air cylinder or a hydraulic cylinder, the power part (21) is arranged in the rotating seat (22), and the rotating seat (22) is rotatably arranged in the positioning frame (2) through rotating shafts (23) on two sides of the rotating seat; the end part of a telescopic shaft (24) on the power part (21) is connected into a stress part (34) on the rotating frame (3);

the bending assembly comprises a rotatable rotating frame (3), and a stress piece (34) which is acted with the power piece (21) is arranged on the rotating frame (3); the rotating frame (3) is also provided with a second lower pressing piece (31), and the second lower pressing piece (31) is pressed on the upper backing plate (81); the bending assembly further comprises a bending base (61) rotatably arranged on the section placing seat (6), the bending base (61) is arranged below the lower base plate (82), an extending platform (612) is arranged on the bending base (61), the extending platform (612) abuts against the lower portion of the lower base plate (82), and the extending platform (612) is arranged towards the rotating direction; the rotating frame (3) and the bending base (61) rotate coaxially; the second lower pressing piece (31) and the bent base (61) are arranged up and down oppositely and clamped on the upper side and the lower side of the cushion plate;

the limiting assembly comprises a positioning seat (5) fixed on the bottom plate (11), a positioning plate (51) is arranged on the positioning seat (5), a positioning ejector rod (52) with adjustable length is arranged on the positioning plate (51), and the bending assembly is abutted to the limiting assembly after rotating to achieve limiting.

2. A profile bending device according to claim 1, wherein in the profile resting assembly, the profile resting seat (6) is provided with a curved seat resting cavity (66) in which the curved seat (61) is placed.

3. A profile bending device according to claim 1, wherein in the profile-laying assembly, the upper plate (81) comprises a first upper plate (811) and a second upper plate (812) which are separated or broken, the first lower pressing member (25) presses on the first upper plate (811), and the second lower pressing member (31) presses on the second upper plate (812).

4. A profile bending apparatus according to claim 1, wherein in the positioning assembly, the lower end of the first lower pressing member (25) is pressed against the first pressing plate (26) by means of a first pressing block (251), the first pressing plate (26) being pressed against the upper shim plate (81).

5. A profile bending apparatus according to claim 5, wherein the positioning assembly is relatively movable between the first press block (251) and the first press plate (26).

6. A profile bending apparatus according to claim 1, wherein the force receiving member (34) is pivotally connected to the telescopic shaft (24) on the power member (21) in the bending assembly.

7. A profile bending apparatus according to claim 1, wherein in the bending module, a second pressing block (341) is provided on said second pressing member (31), and said second pressing block (341) presses said second pressing member (31); a second pressing plate (32) is arranged at the lower part of the second lower pressing piece (31), and the second pressing plate (32) is pressed on the upper backing plate (81); the lower part of the second lower pressing piece (31) is in arc surface contact with the second pressing plate (32).

8. A profile bending apparatus according to claim 1, wherein in the bending module, the rotating frame (3) is rotatably provided on the base (4), and both sides of the bending base (61) are fixed to the rotating frame (3) and rotate coaxially with the rotating frame (3).

9. A profile bending apparatus according to claim 1, wherein in the bending assembly, a guide limiting hole (33) is formed in a side plate of the rotating frame (3), and guide bosses disposed in the guide limiting hole (33) are formed at both sides of the second pressing member (31).

10. A profile bending device according to claim 1, wherein the base plate (11) is provided with a notch (12), said notch (12) being provided below the kickdown position.

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