Bending machine with cutter rotating mechanism

Abstract

The utility model relates to a bending machine with a cutter rotating mechanism, which comprises a rack, an upper bending unit, a lower bending unit and a moving mechanism, and the rack comprises an upper rack and a lower rack; the moving mechanism comprises a sliding block and a first driving unit; the upper bending unit is installed at the bottom end of the sliding block. The lower bending unit is mounted at the top end of the lower rack; each of the upper bending unit and the lower bending unit comprises a first cutter and a second cutter; the device further comprises an upper cutter rotating mechanism and a lower cutter rotating mechanism. The upper cutter rotating mechanism is installed on the sliding block, connected with the upper bending unit and used for controlling switching of a first cutter and a second cutter on the upper bending unit. The lower cutter rotating mechanism is installed on the lower rack, connected with the lower bending unit and used for controlling switching of the first cutter and the second cutter on the lower bending unit. When the same plate needs to be bent in two opposite directions, the function that the plate to be machined does not need to be turned over manually can be achieved through the plate bending device.

Description

Technical Field

[0001] The utility model relates to the technical field of bending machines, in particular to a bending machine with a tool rotating mechanism. Background Art

[0002] In the door manufacturing industry, bending machines are critical equipment for bending sheet materials (such as steel and aluminum alloy sheets) to design requirements. However, traditional bending machine designs often feature only one set of bending dies, consisting of a concave and convex die, fixed to the machine tool, enabling only one-way bending. This design presents significant limitations when faced with manufacturing requirements requiring bidirectional bending of sheet materials.

[0003] First, when bending a sheet of metal in two opposite directions (for example, a Z-shape), existing bending machines typically require manual intervention to remove the large sheet from the machine, flip it over, and then reposition it for the second bend. This process places heavy physical strain on the operator and also exposes them to the risk of the sheet slipping or colliding, posing a potential threat to their safety and health.

[0004] Secondly, manual sheet flipping not only adds a non-value-added step to the production process, but also significantly reduces production efficiency. Each flip consumes additional time and manpower, and it is also necessary to ensure the sheet is accurately positioned after flipping. This time-consuming and error-prone process not only extends production cycle time but also may lead to increased production costs.

[0005] Furthermore, manual operation inevitably leads to errors such as inaccurate positioning and deviations in bending angles. These issues not only lead to material waste and increased material costs, but can also affect the quality and precision of the final panels. In the door manufacturing industry, panel precision and dimensional stability are crucial to overall product performance and user satisfaction.

[0006] Finally, over-reliance on manual operations reduces the automation level of the production line, limiting the potential for increased production efficiency. With the transformation and upgrading of the manufacturing industry, automation and intelligentization have become the development trend in the door manufacturing industry. However, traditional bending machines lack flexible mold replacement mechanisms and automatic flipping functions, making it difficult to meet market demand for high-efficiency, high-precision sheet metal products.

[0007] In summary, existing bending machines have safety hazards, low production efficiency, increased material costs, and insufficient automation when dealing with complex bending tasks in the door manufacturing industry. An innovative solution is urgently needed to overcome these technical bottlenecks and improve the overall competitiveness and product quality of the door manufacturing industry. Utility Model Content

[0008] The purpose of the utility model is to provide a bending machine with a tool rotation mechanism, which can realize the function of not manually turning over the plate to be processed when the same plate needs to be bent in two opposite directions.

[0009] The utility model discloses a bending machine with a tool rotating mechanism, comprising a frame, an upper bending unit, a lower bending unit and a moving mechanism, wherein the frame comprises an upper frame and a lower frame; the moving mechanism comprises a slider and a first driving unit, the slider being mounted on the upper frame so as to be able to slide up and down, the first driving unit being connected to the slider and being used to drive the slider to move up and down relative to the upper frame; the upper bending unit is mounted on the bottom end of the slider; the lower bending unit is mounted on the top end of the lower frame, and the upper bending unit and the lower bending unit are arranged opposite to each other in an upper and lower manner;

[0010] The upper bending unit and the lower bending unit each include a first tool and a second tool;

[0011] It also includes an upper tool rotating mechanism and a lower tool rotating mechanism;

[0012] The upper tool rotation mechanism is installed on the slider and connected to the upper bending unit, and is used to control the switching between the first tool and the second tool on the upper bending unit;

[0013] The lower tool rotating mechanism is installed on the lower frame and connected to the lower bending unit, and is used to control the switching between the first tool and the second tool on the lower bending unit.

[0014] Optionally, the upper tool rotation mechanism includes a first rotation unit and two second drive units;

[0015] The two second driving units are respectively installed on the left and right sides of the slider;

[0016] Each second driving unit includes a first cylinder and a first guide shaft, wherein the first cylinder is connected to the first rotating unit via the first guide shaft;

[0017] The first rotating unit includes a first rotating drive assembly, a first rotating fixed shaft and two first rotating seats;

[0018] The two first rotating seats are respectively connected to the two first guide shafts in a one-to-one correspondence;

[0019] Both ends of the first rotating fixed shaft are respectively mounted on two first rotating seats;

[0020] The first rotation driving assembly is connected to one end of the first rotation fixed shaft;

[0021] The first and second cutting tools of the upper bending unit are both mounted on a first rotating fixed shaft. When the cutting tools need to be switched, the first rotating unit drives the first rotating fixed shaft to rotate, thereby switching the first and second cutting tools on the upper bending unit to meet the needs of different bending directions.

[0022] Optionally, the second drive unit further comprises a first fixing seat, and the first cylinder and the first guide shaft are mounted on the slide via the first fixing seat, which increases the stability and reliability of the second drive unit to ensure smooth tool switching.

[0023] Optionally, the upper tool rotation mechanism further includes a first limiting unit, comprising a first rotation limiting block mounted on the bottom end of the slider and two first limiting slots provided on the first rotation fixing shaft, the first rotation limiting block being provided with a first limiting protrusion corresponding to the first limiting slots. When the tool is switched, the piston rod of the first cylinder retracts, and the tool is fixed in position by the first limiting slots and the first limiting protrusions.

[0024] Optionally, the first rotation drive assembly includes a drive motor and a first reducer, wherein the first drive motor is connected to one end of the first rotation fixed shaft via the first reducer. The use of the first reducer can reduce the rotation speed of the first drive motor.

[0025] Optionally, the lower tool rotation mechanism includes a second rotation unit and two third drive units;

[0026] The two third drive units are respectively installed on the left and right sides of the lower frame;

[0027] Each third driving unit includes a second cylinder and a second guide shaft, wherein the second cylinder is connected to the second rotating unit via the second guide shaft;

[0028] The second rotating unit includes a second rotating drive assembly, a second rotating fixed shaft and two second rotating seats;

[0029] The two second rotating seats are respectively connected to the two second guide shafts in a one-to-one correspondence;

[0030] Both ends of the second rotating fixed shaft are respectively mounted on two second rotating seats;

[0031] The second rotation driving assembly is connected to one end of the second rotation fixed shaft;

[0032] The first and second cutting tools of the lower bending unit are both mounted on a second rotating fixed shaft. When the cutting tools need to be switched, the second rotating unit drives the second rotating fixed shaft to rotate, thereby switching the first and second cutting tools on the lower bending unit to meet the needs of different bending directions.

[0033] Optionally, the third drive unit further includes a second fixing base, and the second cylinder and the second guide shaft are mounted on the lower frame via the second fixing base. This increases the stability and reliability of the third drive unit, thereby ensuring smooth tool switching.

[0034] Optionally, the lower tool rotation mechanism further includes a second limiting unit;

[0035] The second limiting unit includes a second rotation limiting block mounted on the top of the lower frame and two second limiting slots provided on the second rotational fixed shaft. The second rotation limiting block is provided with a second limiting protrusion that mates with the second limiting slots. When the tool is switched, the piston rod of the second cylinder retracts, and the second limiting slots mate with the second limiting protrusions to limit and secure the tool.

[0036] Optionally, the second rotation drive assembly includes a second drive motor and a second reducer, wherein the second drive motor is connected to one end of the second rotation fixed shaft via the second reducer. The use of the second reducer can reduce the rotation speed of the second drive motor.

[0037] Optionally, the first tool and the second tool are tools of different types, and the plate is bent by the cooperation of the first tool and the second tool.

[0038] Beneficial effects of the utility model:

[0039] (1) The present invention switches between the first and second cutting tools through a tool rotation mechanism. This eliminates the need for manual flipping of the sheet material when bending the same sheet material in two opposite directions, thereby significantly improving production efficiency. Automatic flipping reduces the number of manual steps, reduces worker labor intensity, and avoids sheet material damage or inaccurate bending caused by improper manual operation.

[0040] (2) The use of this utility model in conjunction with robots or other automated equipment makes the entire production process more coherent and reduces the need for manual intervention. This combination improves the overall automation level of the assembly line, allowing each step in the production process to be closely connected, thereby improving production efficiency and product quality.

[0041] (3) The present invention avoids problems such as position deviation and inaccurate angle caused by manual operation, which significantly improves the bending accuracy. The precise bending angle and position ensure the consistency and stability of the product, and improve the overall quality of the product.

[0042] (4) The present invention avoids product variations caused by individual differences in operators through precise control of automated equipment. This consistency ensures that quality differences between products are minimized, making the products more in line with customer needs and expectations.

[0043] (5) The automated flipping and bending functions of the present invention reduce the number of manual steps and time required, thereby improving production efficiency. At the same time, by reducing manual intervention and losses caused by improper operation, production costs are reduced and the profitability of the enterprise is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a front view of a bending machine with a tool rotation mechanism according to an embodiment of the present application;

[0045] Figure 2 2 is a side view of a bending machine with a tool rotation mechanism according to an embodiment of the present application;

[0046] Figure 3 This is a schematic diagram of the principle of bending a plate into a Z shape using the rotary mechanism with a cutter described in an embodiment of the present application;

[0047] Figure 4 It is a principle block diagram of the electronic control part of the bending machine with a tool rotation mechanism described in the embodiment of the present application.

[0048] In the figure: 1. first cylinder, 2. first fixed seat, 3. first guide shaft, 4. first drive motor, 5. first reducer, 6. first rotating seat, 7. first rotating fixed shaft, 7a, first limiting groove, 8. first tool, 9. first rotating limit block, 9a, first limiting protrusion, 10. slider, 11. upper frame, 12. servo motor, 13. second tool, 14. second rotating seat, 15. second reducer, 16. second drive motor, 17. second guide shaft, 18. second fixed seat, 19. second cylinder, 20. lower frame, 21. second rotating limit block, 21a, second limiting protrusion, 22. second rotating fixed shaft, 22a, second limiting groove, 23. plate, 24. third reducer, 25. control host. DETAILED DESCRIPTION

[0049] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will be able to understand the other advantages and effects of the present invention from the contents disclosed in this specification. The present invention may also be implemented or applied through different specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are merely illustrative of the present invention and are not intended to limit the scope of protection of the present invention.

[0050] like Figure 1 and Figure 2 As shown, in an embodiment of the present application, a bending machine with a tool rotation mechanism includes a frame, an upper bending unit, a lower bending unit, a moving mechanism, an upper tool rotation mechanism and a lower tool rotation mechanism.

[0051] like Figure 1 As shown, in the embodiment of the present application, the rack includes an upper rack 11 and a lower rack 20 .

[0052] like Figure 2 As shown, in the embodiment of the present application, the upper bending unit and the lower bending unit both include a first tool 8 and a second tool 13. In one example, the angle between the first tool 8 and the second tool 13 is 90°.

[0053] like Figure 1 and Figure 2 As shown, in the embodiment of the present application, the moving mechanism includes a slider 10 and a first driving unit. The slider 10 is mounted on the upper frame 11 so as to be able to slide up and down. The first driving unit is connected to the slider 10 and is used to drive the slider 10 to move up and down relative to the upper frame 11.

[0054] like Figure 1 and Figure 2 As shown, in the embodiment of the present application, the upper bending unit is installed on the bottom end of the slider 10; the lower bending unit is installed on the top end of the lower frame 20, and the upper bending unit and the lower bending unit are arranged opposite to each other in the upper and lower directions.

[0055] like Figure 1 and Figure 2 As shown, in the embodiment of the present application, the upper tool rotation mechanism is installed on the slider 10 and connected to the upper bending unit, which is used to control the switching of the first tool 8 and the second tool 13 on the upper bending unit.

[0056] like Figure 1 and Figure 2 As shown, in the embodiment of the present application, the lower tool rotation mechanism is installed on the lower frame 20 and connected to the lower bending unit, which is used to control the switching of the first tool 8 and the second tool 13 on the lower bending unit.

[0057] like Figure 1 and Figure 2 As shown, in a possible embodiment, the upper tool rotation mechanism includes a first rotation unit and two second drive units; the two second drive units are respectively installed on the left and right sides of the slider 10. Each second drive unit includes a first cylinder 1 and a first guide shaft 3, and the first cylinder 1 is connected to the first rotation unit through the first guide shaft 3. The first rotation unit includes a first rotation drive assembly, a first rotation fixed shaft 7 and two first rotation seats 6. The two first rotation seats 6 are respectively connected to the two first guide shafts 3 in a one-to-one correspondence. The two ends of the first rotation fixed shaft 7 are respectively installed on the two first rotation seats 6. The first rotation drive assembly is connected to one end of the first rotation fixed shaft 7. The first tool 8 and the second tool 13 of the upper bending unit are both installed on the first rotation fixed shaft 7. When it is necessary to switch the tools, the first rotation unit drives the rotation of the first rotation fixed shaft 7, thereby realizing the switching of the first tool 8 and the second tool 13 on the upper bending unit to meet the requirements of different bending directions.

[0058] like Figure 1 and Figure 2 As shown, in a possible embodiment, the second driving unit further includes a first fixing seat 2 , and the first cylinder 1 and the first guide shaft 3 are mounted on the slider 10 via the first fixing seat 2 .

[0059] like Figure 1 and Figure 2 As shown, in a possible embodiment, the upper tool rotation mechanism also includes a first limiting unit, the first limiting unit includes a first rotation limiting block 9 installed on the bottom end of the slider 10, and two first limiting grooves 7a arranged on the first rotation fixed shaft 7, and a first limiting protrusion 9a corresponding to the first limiting groove 7a is provided on the first rotation limiting block 9.

[0060] like Figure 1 and Figure 2 As shown, in a possible embodiment, the first rotation drive assembly includes a drive motor 4 and a first reducer 5 , and the first drive motor 4 is connected to one end of the first rotation fixed shaft 7 through the first reducer 5 .

[0061] like Figure 1 and Figure 2 As shown, in the embodiment of the present application, the working process of the upper tool rotation mechanism is as follows:

[0062] When it is necessary to switch the tool of the upper bending unit, the piston rod of the first cylinder 1 located on the left and right sides of the slider 10 is controlled to extend. While the piston rod of the first cylinder 1 is extended, the first rotating unit and the upper bending unit are pushed downward together, so that the first limiting groove 7a is separated from the first limiting protrusion 9a. When the first rotating unit moves downward into place, the first drive motor 4 is controlled to rotate in a preset direction, so that the upper bending unit switches from the current tool to another tool (if the current tool is the first tool 8, it switches from the first tool 8 to the second tool 13; if the current tool is the second tool 13, it switches from the second tool 13 to the first tool 8). Then, the piston rod of the first cylinder 1 is controlled to retract. While the piston rod of the first cylinder 1 retracts, it drives the first rotating unit and the upper bending unit to move upward together. When the first rotating unit moves upward into place, the first limiting protrusion 9a on the first rotation limiting block 9 is just stuck in the first limiting groove 7a on the first rotation fixed shaft 7, so that the limit is firm and there is no shaking, and it can continue to be used normally.

[0063] like Figure 1 and Figure 2 As shown, in one possible embodiment, the lower tool rotation mechanism includes a second rotation unit and two third drive units. The two third drive units are mounted on the left and right sides of the lower frame 20, respectively. Each third drive unit includes a second cylinder 19 and a second guide shaft 17. The second cylinder 19 is connected to the second rotation unit via the second guide shaft 17. The second rotation unit includes a second rotation drive assembly, a second rotation fixed shaft 22, and two second rotation seats 14. The two second rotation seats 14 are connected to the two second guide shafts 17 in a one-to-one relationship. The two ends of the second rotation fixed shaft 22 are respectively mounted on the two second rotation seats 14. The second rotation drive assembly is connected to one end of the second rotation fixed shaft 22. The first tool 8 and the second tool 13 of the lower bending unit are both mounted on the second rotation fixed shaft 22. When the tools need to be switched, the second rotation unit drives the rotation of the second rotation fixed shaft 22, thereby switching the first tool 8 and the second tool 13 on the lower bending unit to accommodate different bending direction requirements.

[0064] like Figure 1 and Figure 2 As shown, in a possible embodiment, the third driving unit further includes a second fixing base 18 , and the second cylinder 19 and the second guide shaft 17 are mounted on the lower frame 20 via the second fixing base 18 .

[0065] like Figure 1 and Figure 2As shown, in one possible embodiment, the lower tool rotation mechanism further includes a second limiting unit. The second limiting unit includes a second rotation limiting block 21 mounted on the top of the lower frame 20, and two second limiting grooves 22a provided on the second rotation fixed shaft 22. The second rotation limiting block 21 is provided with a second limiting protrusion 21a corresponding to the second limiting grooves 22a.

[0066] like Figure 1 and Figure 2 As shown, in a possible embodiment, the second rotation drive assembly includes a second drive motor 16 and a second reducer 15 , and the second drive motor 16 is connected to one end of the second rotation fixed shaft 22 through the second reducer 15 .

[0067] like Figure 1 and Figure 2 As shown, in a possible embodiment, the first tool 8 and the second tool 13 are tools of different types, and the sheet metal part is bent by the cooperation of the first tool 8 and the second tool 13 .

[0068] like Figure 1 and Figure 2 As shown, the working process of the lower tool rotation mechanism is as follows:

[0069] When it is necessary to switch the tool of the lower bending unit, the piston rods of the second cylinders 19 on the left and right sides of the lower frame 20 are controlled to extend. When the piston rods of the second cylinders 19 extend, the second rotating unit and the lower bending unit are pushed upward together, so that the second limiting groove 22a on the second rotating fixed shaft 22 is separated from the second limiting protrusion 21a on the second limiting protrusion 21. When the second rotating unit moves upward into place, the second driving motor 16 is controlled to rotate in a preset direction, so that the lower bending unit switches from the current tool to another tool (if the current tool is the first tool), the lower bending unit is switched from the current tool to the current tool. If the current tool is the second tool 13, then switch from the first tool 8 to the second tool 13; if the current tool is the second tool 13, switch from the second tool 13 to the first tool 8); then control the piston rod of the second cylinder 19 to retract, and while the piston rod of the second cylinder 19 retracts, it drives the second rotating unit and the lower bending unit to move downward. When the second rotating unit moves downward into place, the second limiting protrusion 21a on the second rotation limiting block 21 is just stuck in the second limiting groove 22a on the second rotation fixing shaft 22, so that the limit is firm and there is no shaking, and it can continue to be used normally.

[0070] like Figure 3As shown, in a possible embodiment, when the plate 23 needs to be bent into a Z shape, the first bending is first completed by cooperating the second tool 13 in the upper bending unit with the first tool 8 in the lower bending unit, and then the upper bending unit is switched to the first tool 8, and the lower bending unit is switched to the second tool 13, and the second bending is completed by cooperating the first tool 8 of the upper bending unit with the second tool 13 of the lower bending unit.

[0071] like Figure 1 and Figure 4 As shown, in one possible embodiment, the first drive unit includes a servo motor 12, a third reducer 24, and a roller screw drive assembly for converting rotation into linear motion (the roller screw drive assembly is conventional and not shown in the figure). The servo motor 12 is connected to the input end of the roller screw drive assembly through the third reducer 24, and the output end of the roller screw drive assembly is connected to the slider 10. The servo motor 12 drives the slider 10 to move up and down, thereby driving the upper bending unit to move up or down.

[0072] like Figure 4 As shown, when the bending machine with a tool rotating mechanism is used, the first cylinder 1, the second cylinder 19, the first drive motor 4, the second drive motor 16, and the servo motor 12 are respectively connected to the control host 25. The control host 25 controls the operation of the first cylinder 1, the second cylinder 19, the first drive motor 4, the second drive motor 16, and the servo motor 12.

[0073] These are the preferred implementations of the present invention, but the implementations of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A bending machine with a tool rotating mechanism, comprising a frame, an upper bending unit, a lower bending unit and a moving mechanism, wherein the frame comprises an upper frame (11) and a lower frame (20); the moving mechanism comprises a slider (10) and a first driving unit, wherein the slider (10) is mounted on the upper frame (11) so as to be able to slide up and down; the first driving unit is connected to the slider (10) and is used to drive the slider (10) to move up and down relative to the upper frame (11); the upper bending unit is mounted on the bottom end of the slider (10); the lower bending unit is mounted on the top end of the lower frame (20), and the upper bending unit and the lower bending unit are arranged in an upward and downward relative manner; and the characteristics are as follows: The upper bending unit and the lower bending unit both comprise a first tool (8) and a second tool (13); It also includes an upper tool rotating mechanism and a lower tool rotating mechanism; The upper tool rotation mechanism is mounted on the slider (10) and connected to the upper bending unit, and is used to control the switching of the first tool (8) and the second tool (13) on the upper bending unit; The lower tool rotation mechanism is mounted on the lower frame (20) and connected to the lower bending unit, and is used to control the switching of the first tool (8) and the second tool (13) on the lower bending unit.

2. The bending machine with a tool rotating mechanism according to claim 1, characterized in that: The upper tool rotation mechanism includes a first rotation unit and two second drive units; The two second drive units are respectively mounted on the left and right sides of the slider (10); Each second driving unit comprises a first cylinder (1) and a first guide shaft (3), wherein the first cylinder (1) is connected to the first rotating unit via the first guide shaft (3); The first rotating unit comprises a first rotating drive assembly, a first rotating fixed shaft (7) and two first rotating seats (6); The two first rotating seats (6) are respectively connected to the two first guide shafts (3) in a one-to-one correspondence; Both ends of the first rotating fixed shaft (7) are respectively mounted on two first rotating seats (6); The first rotary drive assembly is connected to one end of a first rotary fixed shaft (7); The first tool (8) and the second tool (13) of the upper bending unit are both mounted on the first rotating fixed shaft (7).

3. The bending machine with a tool rotating mechanism according to claim 2, characterized in that: The second drive unit further comprises a first fixing seat (2), and the first cylinder (1) and the first guide shaft (3) are mounted on the slider (10) via the first fixing seat (2).

4. The bending machine with a tool rotating mechanism according to claim 2, characterized in that: The upper tool rotation mechanism further comprises a first limiting unit, comprising a first rotation limiting block (9) mounted on the bottom end of the slider (10), and two first limiting grooves (7a) arranged on the first rotation fixed shaft (7), and the first rotation limiting block (9) is provided with a first limiting protrusion (9a) corresponding to the first limiting groove (7a).

5. The bending machine with a tool rotating mechanism according to claim 2, characterized in that: The first rotary drive assembly comprises a drive motor (4) and a first reducer (5), and the first drive motor (4) is connected to one end of a first rotary fixed shaft (7) via the first reducer (5).

6. The bending machine with a tool rotating mechanism according to claim 1, characterized in that: The lower tool rotation mechanism includes a second rotation unit and two third drive units; The two third drive units are respectively mounted on the left and right sides of the lower frame (20); Each third driving unit comprises a second cylinder (19) and a second guide shaft (17), wherein the second cylinder (19) is connected to the second rotating unit via the second guide shaft (17); The second rotating unit comprises a second rotating drive assembly, a second rotating fixed shaft (22) and two second rotating seats (14); The two second rotating seats (14) are respectively connected to the two second guide shafts (17) in a one-to-one correspondence; Both ends of the second rotating fixed shaft (22) are respectively mounted on two second rotating seats (14); The second rotation drive assembly is connected to one end of a second rotation fixed shaft (22); The first tool (8) and the second tool (13) of the lower bending unit are both mounted on the second rotating fixed shaft (22).

7. The bending machine with a tool rotating mechanism according to claim 6, characterized in that: The third drive unit further comprises a second fixing seat (18), and the second cylinder (19) and the second guide shaft (17) are mounted on the lower frame (20) via the second fixing seat (18).

8. The bending machine with a tool rotating mechanism according to claim 6, characterized in that: The lower tool rotation mechanism further includes a second limiting unit; The second limiting unit comprises a second rotation limiting block (21) mounted on the top of the lower frame (20), and two second limiting slots (22a) arranged on the second rotation fixed shaft (22); the second rotation limiting block (21) is provided with a second limiting protrusion (21a) corresponding to the second limiting slots (22a).

9. The bending machine with a tool rotating mechanism according to claim 6, characterized in that: The second rotation drive assembly comprises a second drive motor (16) and a second reducer (15), and the second drive motor (16) is connected to one end of the second rotation fixed shaft (22) via the second reducer (15).

10. The bending machine with a tool rotating mechanism according to any one of claims 1 to 9, characterized in that: The first tool (8) and the second tool (13) are different types of tools, and the sheet metal part is bent by the cooperation of the first tool (8) and the second tool (13).

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