CN220028290U - Bending machine - Google Patents

Abstract

The utility model discloses a bending machine, which comprises: a frame; the bending die comprises a lower die assembly arranged at the bottom of the frame, an upper die assembly arranged at the top of the frame and an upper die driving assembly used for driving the upper die assembly to descend or ascend relative to the lower die assembly; the adjusting device is in transmission connection with the lower die assembly and the upper die assembly of the bending die and is used for synchronously adjusting the positions of the lower die assembly and the upper die assembly on the frame; the plate fixing device is arranged on the frame and used for fixing a plate to be processed when the bending die works; compared with the prior art, the bending machine provided by the utility model has the advantages that the positions of the lower die assembly and the upper die assembly on the frame can be synchronously adjusted through the adjusting device, so that the position of the lower die assembly for supporting a plate to be processed is changed, and meanwhile, the upper die assembly synchronously moves and is accurately aligned with the lower die assembly, and the bending precision of the plate can be ensured.

Description

Bending machine

Technical Field

The utility model relates to the technical field of sheet metal machining, in particular to a bending machine.

Background

Bending is a common procedure of sheet metal machining, and the bending process is to press the upper bending die to the lower bending die, and then bend and shape the sheet metal part arranged between the upper bending die and the lower bending die. Some sheet metal parts need to be bent simultaneously to the two sides of the sheet metal parts in the processing process, because two groups of bending molds are arranged on the rack of the bending machine, when the sheet metal parts are processed, the two groups of bending molds are started simultaneously, and the two sides of the sheet metal parts are bent and formed. However, when the positions of the two groups of bending dies are adjusted, the adjusting device is arranged on the frame of the bending machine, the bending lower dies of the two groups of bending dies are synchronously moved, and then the other group of adjusting device synchronously moves the bending upper dies of the two groups of bending dies, so that the distance between the two groups of bending dies is adjusted according to the width and the bending position of the sheet metal part.

Disclosure of Invention

The utility model aims to provide a bending machine which is used for solving the technical problems.

A bending machine, comprising:

a frame;

the bending die comprises a lower die assembly arranged at the bottom of the frame, an upper die assembly arranged at the top of the frame and an upper die driving assembly used for driving the upper die assembly to descend or ascend relative to the lower die assembly;

the adjusting device is in transmission connection with the lower die assembly and the upper die assembly of the bending die and is used for synchronously adjusting the positions of the lower die assembly and the upper die assembly on the frame;

the plate fixing device is arranged on the frame and used for fixing a plate to be processed when the bending die works.

According to one embodiment of the utility model, the adjusting device comprises a driving motor, a driving wheel, a synchronous belt, a lower driving screw, a lower driven wheel, an upper driving screw and an upper driven wheel, wherein the driving motor is arranged on the frame, the output end of the driving motor is connected with the driving wheel, the lower driving screw is arranged at the bottom of the frame, the lower driven wheel is arranged on the lower driving screw, the upper driving screw is arranged at the top of the frame, the upper driven wheel is arranged on the upper driving screw, the synchronous belt is connected between the driving wheel, the lower driven wheel and the upper driven wheel in a rolling way, the lower die assembly is connected onto the lower driving screw in a sliding way through a lower screw nut, and the upper die assembly is connected onto the upper driving screw in a sliding way through an upper screw nut.

According to one embodiment of the utility model, the lower die assembly comprises a lower die holder, a lower die holder and a lower bending knife, wherein the lower die holder is connected with the adjusting device, the lower die holder is arranged on the lower die holder, and the lower bending knife is arranged on the lower die holder.

According to one embodiment of the utility model, the upper die assembly comprises an upper die holder, an upper die frame, an upper bending knife and an upper die slide bar, wherein the upper die holder is connected with the adjusting device, the upper die slide bar is connected to the upper die holder, the upper die frame is connected to the upper die slide bar in a sliding manner, the upper bending knife is arranged on the upper die frame, and the upper die driving assembly is arranged on the upper die holder and connected with the upper bending knife.

According to one embodiment of the utility model, the lower surface of the upper bending knife is connected with a guide post, and the lower die assembly is provided with a guide groove corresponding to the guide post.

According to one embodiment of the utility model, the upper die driving assembly comprises a servo electric cylinder, an electric cylinder joint and a driving block, wherein the servo electric cylinder is arranged on the upper die holder, the output end of the servo electric cylinder is connected with one end of the electric cylinder joint, the other end of the electric cylinder joint is rotationally connected with the driving block, and the driving block is connected with the upper bending knife.

According to one embodiment of the utility model, the two sides of the driving block are provided with the rotating shaft sleeves, the two sides of the upper bending knife are provided with the rotating shaft seats, and the rotating shaft sleeves are rotationally connected with the rotating shaft seats through the rotating shafts.

According to one embodiment of the utility model, the plate fixing device comprises a lower supporting component and an upper pressing plate component, wherein the lower supporting component comprises a lower supporting seat arranged at the bottom of the frame, a lower supporting plate arranged on the lower supporting seat and a plurality of suckers uniformly distributed on the lower supporting plate, the upper pressing plate component comprises an upper pressing plate driving piece arranged at the bottom of the frame and an upper pressing plate connected with the driving end of the upper pressing plate driving piece, and the upper pressing plate driving piece is used for driving the upper pressing plate to descend or ascend relative to the lower supporting plate.

According to one embodiment of the utility model, the plate fixing device further comprises an output assembly, the output assembly comprises an output support, an output motor, an output screw rod and a jacking cylinder, the output motor is arranged on the output support, the output screw rod is arranged along the length direction of the output support and is connected with the output end of the output motor, the lower support seat is slidably connected to the output screw rod through an output nut, the jacking cylinder is arranged on the lower support seat, and the driving end of the jacking cylinder is connected with the lower support plate.

According to one embodiment of the utility model, two groups of bending dies and two groups of adjusting devices are arranged on two sides of the plate fixing device, and the lower die assembly and the upper die assembly of each group of bending dies are respectively in transmission connection with the adjusting devices on the corresponding sides.

Compared with the prior art, the bending machine has the following advantages:

according to the bending machine disclosed by the utility model, when a plurality of bending positions of the plate to be processed, which is fixed on the plate fixing device, are bent to form, after one bending, the positions of the lower die assembly and the upper die assembly on the frame can be synchronously adjusted through the adjusting device when the bending positions of the plate are changed, so that the position of the lower die assembly for supporting the plate to be processed is changed, and meanwhile, the upper die assembly synchronously moves and is accurately aligned with the lower die assembly, and the bending precision of the plate can be ensured.

Drawings

Fig. 1 is a schematic view of the structure of the bending machine of the present utility model;

fig. 2 is a schematic view of another direction of the bending machine of the present utility model;

fig. 3 is a cross-sectional view of the bending machine of the present utility model;

in the figure: 1. the machine comprises a frame, a lower die holder moving slide rail, an upper die holder moving slide rail, a bending die, a lower die assembly and a lower die assembly, wherein the lower die holder moving slide rail is arranged on the frame, the upper die holder moving slide rail is arranged on the frame, the lower die holder moving slide rail is arranged on the frame, the bending 211, a lower screw rod nut, 212, a lower die holder, 213, a lower die holder, 214, a lower bending cutter, 22, an upper die assembly 221, upper screw nut, 222, upper die holder, 223, upper die carrier, 224, upper bending blade, 225, upper die slide bar, 226, guide post, 227, rotary shaft seat, 23, upper die drive assembly, 231, servo cylinder, 232, cylinder joint, and other components. 233, drive block, 234, rotating sleeve, 3, adjustment device, 31, drive motor, 32, drive wheel, 33, timing belt, 34, lower drive screw, 35, lower driven wheel, 36, upper drive screw, 37, upper driven wheel, 4, plate mounting device, 41, lower support seat, 42, lower support plate, 43, suction cup, 44, upper platen drive, 45, upper platen, 46, output bracket, 461, output moving slide rail, 47, output motor, 48, output screw, 49, jacking cylinder

The implementation and advantages of the functions of the present utility model will be further described with reference to the accompanying drawings.

Detailed Description

Various embodiments of the utility model are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the utility model. That is, in some embodiments of the utility model, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.

It should be noted that all directional indicators (such as up, down, left and right, front and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the utility model solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

For a further understanding of the nature, features, and efficacy of the present utility model, the following examples are set forth in order to provide a further understanding of the utility model, and are intended to be described in connection with the accompanying drawings:

referring to fig. 1 to 3, the utility model discloses a bending machine, which comprises a frame 1, a bending die 2, an adjusting device 3 and a plate fixing device 4, wherein the bending die 2 comprises a lower die assembly 21 arranged at the bottom of the frame 1, an upper die assembly 22 arranged at the top of the frame 1 and an upper die driving assembly 23 for driving the upper die assembly 22 to descend or ascend relative to the lower die assembly 21; the adjusting device 3 is in transmission connection with the lower die assembly 21 and the upper die assembly 22 of the bending die 2 and is used for synchronously adjusting the positions of the lower die assembly 21 and the upper die assembly 22 on the frame 1; the plate fixing device 4 is arranged on the frame 1 and is used for fixing a plate to be processed when the bending die 2 works. When the bending machine is used, a plate to be processed is fixed by the plate fixing device 4, the bent part of the plate to be processed is supported by the lower die assembly 21, then the upper die driving assembly 23 drives the upper die assembly 22 to descend relative to the lower die assembly 21 so as to bend the plate to be processed, after the plate to be processed is bent, the upper die driving assembly 23 drives the upper die assembly 22 to ascend relative to the lower die assembly 21, and then the plate fixing device 4 loosens the bent plate. When the plate to be processed fixed on the plate fixing device 4 is formed by bending a plurality of bending positions, after one bending is completed, the positions of the lower die assembly 21 and the upper die assembly 22 on the frame 1 can be synchronously adjusted through the adjusting device 3 when the bending positions on the plate are changed, so that the position of the lower die assembly 21 for supporting the plate to be processed is changed, and the upper die assembly 22 synchronously moves and is accurately aligned with the lower die assembly 21, and the bending precision of the plate can be ensured.

According to the bending machine, the bending die 2 and the adjusting device 3 can be respectively provided with one group, so that the positions of the bending die 2 can be adjusted by the adjusting device 3 to bend different positions on the same side of the plate to be processed on the plate fixing device 4, and the other side of the plate to be processed on the plate fixing device 4 can be bent by turning the plate to be processed. In order to improve efficiency, a bending machine is generally arranged on two sides of a plate fixing device 4 respectively, and the bending die 2 on each side is connected with a group of adjusting devices 3, so that the bending dies 2 on two sides of the plate fixing device 4 can bend two sides of a plate to be processed at the same time, and efficiency can be improved. When the size of the plate to be processed is changed, the bending position is changed, and the position of the bending die 2 relative to the plate fixing device 4 can be adjusted through the adjusting device 3; similarly, when a plurality of bending positions are arranged on any side of the plate to be processed, the position of the corresponding bending die 2 on the frame 1 can be adjusted by the adjusting device 3.

Referring to fig. 1 and 2, in the illustrated embodiment, the bending machine has two sets of bending dies 2 and adjusting devices 3, the two sets of bending dies 2 are disposed on two sides of the board fixing device 4, and the lower die assembly 21 and the upper die assembly 22 of each set of bending dies 2 are respectively connected with the adjusting devices 3 on the corresponding sides in a driving manner. Each group of adjusting devices 3 independently adjusts the positions of the corresponding bending dies 2, so that the two groups of bending dies 2 can be symmetrical relative to the plate fixing device 4, and can be respectively separated from different distances of the plate fixing device 4, thereby having stronger flexibility and wider application range.

Referring to fig. 1 and 2, the adjusting device 3 of the bending machine of the present utility model includes a driving motor 31, a driving wheel 32, a synchronous belt 33, a lower driving screw 34, a lower driven wheel 35, an upper driving screw 36 and an upper driven wheel 37, wherein the driving motor 31 is disposed on the frame 1, the output end of the driving motor is connected to the driving wheel 32, the lower driving screw 34 is disposed at the bottom of the frame 1, the lower driven wheel 35 is disposed thereon, the upper driving screw 36 is disposed at the top of the frame 1, the upper driven wheel 37 is disposed thereon, the synchronous belt 33 is in rolling connection between the driving wheel 32, the lower driven wheel 35 and the upper driven wheel 37, the lower die assembly 21 is in sliding connection with the lower driving screw 34 through a lower screw nut 211, and the upper die assembly 22 is in sliding connection with the upper driving screw 36 through an upper screw nut 221. It will be appreciated that the distance between the lower die assembly 21 and the sheet material holding means 4 is changed, and the position where the lower die assembly 21 supports the sheet material to be processed is also changed, so that the adjustment means 3 adjusts the distance between the lower die assembly 21 and the sheet material holding means 4. When the positions of the lower die assembly 21 and the upper die assembly 22 on the frame 1 need to be adjusted, the driving motor 31 is started, the output end of the driving motor 31 drives the driving wheel 32 to rotate, the driving wheel 32 drives the synchronous belt 33 to rotate, the synchronous belt 33 rolls among the driving wheel 32, the lower driven wheel 35 and the upper driven wheel 37 and drives the lower driven wheel 35 and the upper driven wheel 37 to rotate, the lower driven wheel 35 and the upper driven wheel 37 respectively drive the lower driving screw 34 and the upper driving screw 36 to rotate, the lower lead screw nut 211 connected with the lower die assembly 21 slides on the lower driving screw 34 and adjusts the position of the lower die assembly 21, the upper lead screw nut 221 connected with the upper die assembly 22 slides on the upper driving screw 36 and synchronously adjusts the position of the upper die assembly 22, so that the lower die assembly 21 and the upper die assembly 22 always synchronously move, and the moving speeds are the same.

Referring to fig. 1, the lower die assembly 21 of the bending machine of the present utility model includes a lower die holder 212, a lower die holder 213 and a lower bending blade 214, wherein the lower die holder 212 is connected with the adjusting device 3, the lower die holder 213 is disposed on the lower die holder 212, and the lower bending blade 214 is disposed on the lower die holder 213. The lower die holder 212 is slidably connected to the lower driving screw 34 through the lower screw nut 211, and when the synchronous belt 33 drives the lower driven wheel 35 to rotate, the lower driving screw 34 is driven by the lower driven wheel 35 to rotate, and the lower screw nut 211 slides on the lower driving screw 34, so that the lower die holder 212 is driven to move along the frame 1.

Referring to fig. 1, in order to make the lower die assembly 21 move stably in practical application, a lower die holder moving rail 11 is disposed at the bottom of the frame 1, a lower die holder moving slide block is disposed at the bottom of the lower die holder 212, and the lower die holder moving slide block is slidably connected to the lower die holder moving rail 11.

Referring to fig. 1 and 3, the upper die assembly 22 of the bending machine of the present utility model includes an upper die holder 222, an upper die frame 223, an upper bending blade 224 and an upper die slide bar 225, wherein the upper die holder 222 is connected with the adjusting device 3, the upper die slide bar 225 is connected to the upper die holder 222, the upper die frame 223 is slidably connected to the upper die slide bar 225, the upper bending blade 224 is disposed on the upper die frame 223, and the upper die driving assembly 23 is disposed on the upper die holder 222 and connected to the upper bending blade 224. The upper die holder 222 is slidably connected to the upper driving screw 36 through an upper screw nut 221, and when the synchronous belt 33 drives the upper driven wheel 37 to rotate, the upper driving screw 36 is driven by the upper driven wheel 37 to rotate, and the upper screw nut 221 slides on the upper driving screw 36, so that the upper die holder 222 is driven to move along the frame 1. After the lower die assembly 21 and the upper die assembly 22 are adjusted in place, the adjusting device 3 stops operating, the upper die driving assembly 23 drives the upper bending blade 224 to descend, and the upper die frame 223 slides along the upper die slide rod 225 until the upper bending blade 224 presses onto the plate to be processed placed on the lower bending blade 214 and bends the plate to be processed, and then the upper die driving assembly 23 drives the upper bending blade 224 to ascend and leave the bent plate.

Referring to fig. 1 and 3, in the bending machine of the present utility model, a guide post 226 is connected to the lower surface of the upper bending blade 224, and a guide groove 215 corresponding to the guide post 226 is provided on the lower die assembly 21. When the upper die driving assembly 23 drives the upper bending blade 224 to descend, the guide post 226 moves towards the guide groove 215, so that the upper bending blade 224 and the lower bending blade 214 can be accurately aligned, and when the upper bending blade 224 and the lower bending blade 214 are not slightly misplaced, the guide post 226 is placed into the guide groove 215 to guide the upper bending blade 224, so that the alignment precision of the upper bending blade 224 and the lower bending blade 214 is ensured.

In practical application, in order to make the movement of the upper die assembly 22 smooth, the top of the frame 1 is provided with an upper die holder moving slide rail 12, and the bottom of the upper die holder 222 is provided with an upper die holder moving slide block, which is slidably connected to the upper die holder moving slide rail 12.

Referring to fig. 2, the upper die driving assembly 23 of the bending machine of the present utility model includes a servo cylinder 231, a cylinder joint 232 and a driving block 233, wherein the servo cylinder 231 is disposed on the upper die holder 222, an output end of the servo cylinder is connected to one end of the cylinder joint 232, the other end of the cylinder joint 232 is rotatably connected to the driving block 233, and the driving block 233 is connected to the upper bending blade 224. The upper die driving assembly 23 drives the upper bending cutter 224 to move in a mode that the servo electric cylinder 231 drives the driving block 233 to move, and the bending angle of the workpiece to be processed can be adjusted steplessly according to the rebound characteristic of the material of the workpiece to be processed.

Referring to fig. 2, in the bending machine of the present utility model, two sides of a driving block 233 are provided with a rotating shaft sleeve 234, two sides of an upper bending blade 224 are provided with a rotating shaft seat 227, and the rotating shaft sleeve 234 is rotatably connected with the rotating shaft seat 227 through a rotating shaft. After the upper bending blade 224 descends to the right place, the driving block 233 has inertia at the moment when the servo cylinder 231 stops, the generated force is relatively large, in order to avoid the inertia of the driving block 233 to cause the upper bending blade 224 to press the plate to be processed to be broken, the rotating shaft sleeves 234 are arranged at two sides of the driving block 233, the rotating shaft seats 227 are arranged at two sides of the upper bending blade 224, and at the moment when the servo cylinder 231 stops, the rotating shaft sleeves 234 rotate around the rotating shaft in the rotating shaft seats 227 during the inertia of the driving block 233, so that the plate to be processed can be protected.

Referring to fig. 2 and 3, the bending machine of the present utility model includes a lower support assembly and an upper platen assembly, wherein the lower support assembly includes a lower support seat 41 disposed at the bottom of the frame 1, a lower support plate 42 disposed on the lower support seat 41, and a plurality of suction cups 43 uniformly distributed on the lower support plate 42, and the upper platen assembly includes an upper platen driving member 44 disposed at the bottom of the frame 1 and an upper platen 45 connected to the driving end of the upper platen driving member 44, and the upper platen driving member 44 is used for driving the upper platen 45 to descend or ascend relative to the lower support plate 42. After the plate to be processed is placed on the lower support plate 42, the sucking disc 43 adsorbs the plate to be processed from the lower side of the plate to be processed, then the upper pressing plate driving piece 44 drives the upper pressing plate 45 to descend and press the plate to be processed, so that the plate to be processed is prevented from shifting when the bending die 2 bends the plate to be processed, and the processing precision can be ensured.

Referring to fig. 2 and 3, the plate fixing device 4 of the present utility model further includes an output assembly, the output assembly includes an output bracket 46, an output motor 47, an output screw 48 and a lifting cylinder 49, the output motor 47 is disposed on the output bracket 46, the output screw 48 is disposed along a length direction of the output bracket 46 and is connected to an output end of the output motor 47, the lower support 41 is slidably connected to the output screw 48 through an output nut, the lifting cylinder 49 is disposed on the lower support 41, and a driving end thereof is connected to the lower support 42. After the plate to be processed is bent and formed, the upper pressing plate driving piece 44 drives the upper pressing plate 45 to ascend and leave the bent plate, then the jacking air cylinder 49 is started, the lower supporting component is jacked up, the plate leaves the lower bending knife 214, then the output motor 47 is started and drives the output screw 48 to rotate, the output screw drives the jacking air cylinder 49 to slide along the output screw 48, the lower supporting component is further moved along the length direction of the output support 46, and the plate is output from the bending die 2.

Referring to fig. 2, in order to make the lower support assembly move stably in practical application, the output support 46 is provided with an output moving rail 461, and the bottom of the lower support 41 is provided with a lower support moving slider slidably connected to the output moving rail 461.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A bending machine, comprising:

a frame (1);

the bending die (2) comprises a lower die assembly (21) arranged at the bottom of the frame (1), an upper die assembly (22) arranged at the top of the frame (1) and an upper die driving assembly (23) used for driving the upper die assembly (22) to descend or ascend relative to the lower die assembly (21);

the adjusting device (3) is in transmission connection with a lower die assembly (21) and an upper die assembly (22) of the bending die (2) and is used for synchronously adjusting the positions of the lower die assembly (21) and the upper die assembly (22) on the frame (1);

and the plate fixing device (4) is arranged on the frame (1) and is used for fixing a plate to be processed when the bending die (2) works.

2. The bending machine according to claim 1, wherein the adjusting device (3) comprises a driving motor (31), a driving wheel (32), a synchronous belt (33), a lower driving screw (34), a lower driven wheel (35), an upper driving screw (36) and an upper driven wheel (37), the driving motor (31) is arranged on the frame (1), the output end of the driving motor is connected with the driving wheel (32), the lower driving screw (34) is arranged at the bottom of the frame (1), the lower driven wheel (35) is arranged on the lower driving screw (34), the upper driving screw (36) is arranged at the top of the frame (1), the upper driven wheel (37) is arranged on the upper driving screw (36), the synchronous belt (33) is connected between the driving wheel (32), the lower driven wheel (35) and the upper driven wheel (37) in a rolling mode, the lower die assembly (21) is connected onto the lower driving screw (34) in a sliding mode through a lower screw nut (211), and the upper die assembly (22) is connected onto the upper driving screw (36) in a sliding mode through an upper screw nut (221).

3. Bending machine according to claim 1, characterized in that the lower die assembly (21) comprises a lower die holder (212), a lower die holder (213) and a lower bending blade (214), the lower die holder (212) being connected with the adjusting device (3), the lower die holder (213) being arranged on the lower die holder (212), the lower bending blade (214) being arranged on the lower die holder (213).

4. The bending machine according to claim 1, wherein the upper die assembly (22) comprises an upper die holder (222), an upper die carrier (223), an upper bending blade (224) and an upper die slide bar (225), the upper die holder (222) is connected with the adjusting device (3), the upper die slide bar (225) is connected to the upper die holder (222), the upper die carrier (223) is slidably connected to the upper die slide bar (225), the upper bending blade (224) is arranged on the upper die carrier (223), and the upper die driving assembly (23) is arranged on the upper die holder (222) and is connected with the upper bending blade (224).

5. Bending machine according to claim 4, characterized in that the lower surface of the upper bending blade (224) is connected with a guiding post (226), and the lower die assembly (21) is provided with a guiding groove (215) corresponding to the guiding post (226).

6. The bending machine according to claim 4, wherein the upper die driving assembly (23) comprises a servo electric cylinder (231), an electric cylinder joint (232) and a driving block (233), the servo electric cylinder (231) is arranged on the upper die holder (222), the output end of the servo electric cylinder is connected with one end of the electric cylinder joint (232), the other end of the electric cylinder joint (232) is rotatably connected with the driving block (233), and the driving block (233) is connected with the upper bending knife (224).

7. The bending machine according to claim 6, wherein rotating shaft sleeves (234) are arranged on two sides of the driving block (233), rotating shaft seats (227) are arranged on two sides of the upper bending knife (224), and the rotating shaft sleeves (234) are rotatably connected with the rotating shaft seats (227) through rotating shafts.

8. Bending machine according to claim 1, characterized in that the plate fixing device (4) comprises a lower supporting assembly and an upper pressing plate assembly, the lower supporting assembly comprises a lower supporting seat (41) arranged at the bottom of the frame (1), a lower supporting plate (42) arranged on the lower supporting seat (41) and a plurality of suckers (43) uniformly distributed on the lower supporting plate (42), the upper pressing plate assembly comprises an upper pressing plate driving piece (44) arranged at the bottom of the frame (1) and an upper pressing plate (45) connected with the driving end of the upper pressing plate driving piece (44), and the upper pressing plate driving piece (44) is used for driving the upper pressing plate (45) to descend or ascend relative to the lower supporting plate (42).

9. The bending machine according to claim 8, wherein the plate fixing device (4) further comprises an output assembly, the output assembly comprises an output bracket (46), an output motor (47), an output screw (48) and a jacking cylinder (49), the output motor (47) is arranged on the output bracket (46), the output screw (48) is arranged along the length direction of the output bracket (46) and is connected with the output end of the output motor (47), the lower support seat (41) is slidably connected to the output screw (48) through an output nut, and the jacking cylinder (49) is arranged on the lower support seat (41) and the driving end of the jacking cylinder is connected with the lower support plate (42).

10. Bending machine according to claim 1, characterized in that the bending dies (2) and the adjusting devices (3) are provided with two groups, the two groups of bending dies (2) are arranged on two sides of the plate fixing device (4), and the lower die assembly (21) and the upper die assembly (22) of each group of bending dies (2) are respectively in transmission connection with the adjusting devices (3) on the corresponding sides.