Novel tool for three-dimensional stretch bending of outer belt line

Abstract

The utility model discloses a novel three-dimensional stretch-bending tool for an outer belt line, and belongs to the technical field of machining of automobile parts, the novel three-dimensional stretch-bending tool comprises a base, a clamping assembly is mounted on the base, stretch-bending modules are arranged on the two sides of the clamping assembly, stretch-bending assemblies are arranged on the outer sides of the stretch-bending modules, forming grooves are formed in the front side faces of the stretch-bending modules, and the forming grooves are formed in the front side faces of the stretch-bending modules. The inner bottom face of the forming groove forms a datum plane for stretch bending forming of the sealing strip, a cutting assembly is installed on the end face of the outer side of the stretch bending module, and two punching cutters are symmetrically installed in the clamping assembly. And the cutting assembly, the punching cutter and the stretch bending assembly are respectively connected with a power device. The stretch bending process and the cutting process are integrated in the same tool, the production process is simplified, the production efficiency is improved, and the machining precision is improved.

Description

Technical Field

[0001] This application relates to the field of automotive parts processing technology, and in particular to a novel tooling for external water-cutting three-dimensional bending. Background Technology

[0002] The exterior water-resistant sealing strip for automotive doors (hereinafter referred to as "exterior water-resistant strip") is a functional and decorative automotive component installed on the outside of car doors and windows. Its primary function is to achieve a seal between the door and the window glass, while also serving a decorative purpose. As a functional component, the exterior water-resistant strip provides waterproofing, air resistance, dustproofing, and noise reduction; as a decorative component, its arrangement along the curved lines of the door sheet metal enhances the overall streamlined appearance of the vehicle.

[0003] Currently, the automotive market primarily uses two-dimensional bending technology for exterior waterline forming equipment. However, the curves of car doors are typically not simple two-dimensional deformations, but rather three-dimensional deformations involving both horizontal and vertical directions. Existing two-dimensional bending equipment cannot fully meet the three-dimensional forming requirements of exterior waterline forming, resulting in a mismatch between the exterior waterline and the door's curves and exterior decorative trim during vehicle assembly. This, in turn, affects the door's sealing performance and overall aesthetics.

[0004] To address this issue, several improvements have been proposed in existing technologies. For example, Chinese patent application "External Pressure Strip Bending Equipment" (application number: CN201711169764.3) discloses a device comprising a frame, a pressing and forming mechanism, an ejector mechanism, and a tensioning mechanism. This device decomposes the three-dimensional bending of the sealing strip into two two-dimensional bends, then presses and bends them in one step to form a three-dimensional sealing strip. Because the sealing strip is embedded in a metal skeleton, it will not deform without external force. This equipment presses and bends the sealing strip instead of using traditional stretching and bending, avoiding excessive stretching and deformation caused by stretching and bending. This better preserves the original performance requirements of the sealing strip, simulates the curvature of a car door, and provides the fitability and sealing performance of automotive sealing strips. The equipment is easy to operate and produces good forming results.

[0005] The aforementioned external pressure strip bending equipment can achieve three-dimensional forming of external water-cutting strips to a certain extent. However, this equipment still has some shortcomings. Existing bending equipment usually separates the bending and cutting processes, resulting in a complex production process and low processing efficiency. The external water-cutting strip after bending needs to be cut separately, increasing production time and costs. Moreover, the external water-cutting strip after bending needs to be positioned during the cutting process, and it is difficult to accurately position irregularly shaped external water-cutting strips.

[0006] To address the aforementioned issues, this application proposes a novel tooling that combines a bending process with a roughing process. By integrating bending and roughing functions, this tooling significantly simplifies the production process, improves production efficiency, and simultaneously reduces equipment complexity and manufacturing costs. Utility Model Content

[0007] The technical problem to be solved by this application is to provide a new type of external water-cutting three-dimensional bending tooling that integrates bending and cutting processes into the same tooling, thereby simplifying the production process, improving production efficiency and processing accuracy.

[0008] The technical solution adopted in this application is as follows: a novel three-dimensional bending fixture for external water cutting, including a base, a clamping assembly installed on the base, bending modules on both sides of the clamping assembly, bending components on the outer sides of the bending modules, a forming groove on the front side of the bending module, the inner bottom surface of the forming groove forming a reference surface for bending and forming a sealing strip, a cutting assembly installed at the outer end face of the bending module, and two punching tools symmetrically installed inside the clamping assembly; the cutting assembly, punching tools, and bending assembly are respectively connected to a power unit;

[0009] The middle part of the sealing strip to be processed is mounted on the clamping assembly, and the two ends of the sealing strip to be processed are fixed by the bending assemblies on both sides. The power unit drives the bending assemblies to move the sealing strip to be processed into the forming groove and contact the inner bottom surface of the forming groove. The cutting assembly and the punching tool work to cut the sealing strip located in the forming groove to obtain two curved sealing strips.

[0010] Compared with existing technologies, the advantages of this application are as follows: In traditional processes, the bending and cutting processes are performed separately, requiring multiple clamping and positioning operations, resulting in a complex and inefficient production process. This application integrates the bending and cutting processes into the same tooling, achieving "one-time clamping, simultaneous forming and cutting," significantly simplifying the production process, reducing process changeover time, and improving production efficiency. This application completes cutting directly within the forming groove of the bending module, avoiding secondary positioning and ensuring consistency between cutting accuracy and bending forming. Integrating the bending module, cutting components, and punching tools onto the same base achieves miniaturization and compactness of the equipment, reducing the floor space required on the production site. Driving the bending components, cutting components, and punching tools with a power unit automates the bending and cutting processes, reducing manual intervention. This reduces human error, improves production stability and product consistency, and simultaneously reduces labor costs.

[0011] In some embodiments of this application, the bending module includes a bottom plate and a top plate, the top plate being stacked on top of the bottom plate, the bottom surface of the top plate and the top surface of the bottom plate together forming a forming groove, and a pressing cylinder being connected to the top plate; the pressing cylinder drives the top plate to move and change the opening size of the forming groove.

[0012] The top plate is moved by a downward-pressing cylinder, allowing for flexible adjustment of the opening size of the forming groove, facilitating the embedding of the sealing strip. The inner bottom surface of the forming groove serves as the reference surface for bending, ensuring close contact between the sealing strip and the reference surface during bending, thus improving forming accuracy.

[0013] In some embodiments of this application, a base plate is vertically arranged on the base, a linear guide rail is provided on the front side of the base plate, the top plate is movably mounted on the linear guide rail by a slider, and the pressing cylinder is mounted on the base plate. When the pressing cylinder works, it drives the top plate to move up and down along the linear guide rail.

[0014] The linear guide rail restricts the movement trajectory of the top plate, ensuring its stability during vertical movement and preventing offset or wobbling, thus improving molding accuracy. Driving the top plate along the linear guide rail with a cylinder enables automated operation, reducing manual intervention and increasing production efficiency.

[0015] In some embodiments of this application, the bending assembly includes a bending slide rail, a bending base block, and a bending top block. The bending base block is mounted on the bending slide rail and moves along the bending slide rail under the action of a power device. The bending top block is mounted above the bending base block and moves up and down under the action of a power device to change the distance between the top block and the bending base block.

[0016] The setting of the bending slide rail limits the movement direction and displacement of the bending base block, ensuring stability and consistency throughout the bending process and improving the bending accuracy of the sealing strip.

[0017] In some embodiments of this application, the top surface of the bending base block and the bottom surface of the bending top block are provided with teeth, the bottom surface of the bending top block and the top surface of the bending base block can interlock with each other, the top surface of the bending base block is provided with an installation groove, and an embedding block is connected in the installation groove by a spring. One end face of the embedding block is adapted to the inner wall surface of the sealing strip, and one end face of the embedding block is floating on the bending base block by a spring.

[0018] As the bending base block moves along the bending slide rail towards the sealing strip, the insert block extends into the sealing strip to fill the area. Then, the bending top block presses down to secure the sealing strip at that point. The insert block effectively reduces the stress deformation at the point where the sealing strip is secured. The serrated design ensures a tighter engagement between the bending top block and the bending base block, guaranteeing the sealing strip is firmly fixed during bending and improving molding quality.

[0019] In some embodiments of this application, a first filler connected to a power device is provided at the outer end of the bending module. One end of the first filler is adapted to the inner wall surface of the sealing strip, and the outer side of the first filler is flush with the outer end face of the bending module.

[0020] The first filler conforms to the inner wall of the sealing strip, providing additional support during bending and cutting to prevent the sealing strip from collapsing or deforming during processing. The outer surface of the first filler is flush with the outer end face of the bending module, ensuring precise positioning of the cutting component during cutting and improving cutting accuracy.

[0021] In some embodiments of this application, the cutting assembly includes a cutting blade holder and a cutting blade. The cutting blade is mounted on the cutting blade holder and moves along the cutting blade holder under the drive of a power device. The cutting blade moves to cut the sealing strip against the outer end face of the bending module under the drive of the power device.

[0022] The movement of the cutting blade against the outer end face of the bending module, and the placement of the cutting blade holder, are both aimed at improving cutting accuracy. This application integrates the cutting component with the bending module, avoiding the problem of separating bending and cutting processes in traditional processes and reducing process changeover time.

[0023] In some embodiments of this application, the clamping assembly includes a clamping base block and a clamping top block. The clamping top block is mounted above the clamping base block and moves up and down under the action of a power device to change the distance between it and the clamping base block. The top surface of the clamping base block and the bottom surface of the clamping top block are both provided with teeth. The bottom surface of the clamping top block and the top surface of the clamping base block can interlock with each other.

[0024] The clamping top block and clamping base block engage with each other via toothed grooves to ensure the sealing strip is firmly fixed during processing, preventing slippage or displacement. Specifically, in this application, the clamping top block and clamping base block apply force to the sealing strip on the section of waste material that needs to be punched off, without affecting the finished sealing strip.

[0025] In some embodiments of this application, a second filler connected to a power device is provided on the outer side of the clamping base block. The second filler has two protruding ends that are adapted to the inner wall surface of the sealing strip, and the opposite sides of the two protruding ends are flat. Two punching tools pass through the clamping top block and move in contact with the protruding ends.

[0026] The protruding end of the second filler conforms to the inner wall of the sealing strip, providing additional support during the punching process and preventing deformation of the sealing strip. The punching tool moves in close contact with the protruding end, ensuring precise punching positioning and improving punching accuracy.

[0027] In some embodiments of this application, the clamping base block is provided with a scrap outlet. The scrap outlet allows waste generated during the punching process to be discharged promptly, reducing waste cleaning time and improving production efficiency. It also prevents waste accumulation from affecting processing accuracy and equipment operation.

[0028] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description

[0029] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0030] Figure 1 This is a schematic diagram of the structure of this application;

[0031] Figure 2 This is a structural schematic diagram of the outer end face of the bending module in this application;

[0032] Figure 3 This is a partially exploded structural diagram of the bending assembly of this application;

[0033] Figure 4 This is a schematic diagram of the mounting assembly of this application;

[0034] Figure 5 This is a schematic diagram of the internal structure of the mounting assembly of this application.

[0035] The specific reference numerals in the attached drawings are explained as follows: 1. Base; 2. Clamping assembly; 3. Bending module; 4. Bending assembly; 5. Forming groove; 6. Cutting assembly; 7. Punching tool; 9. Sealing strip; 10. Base plate; 11. Top plate; 12. Pressing cylinder; 13. Base plate; 14. Linear guide rail; 15. Slider; 17. Bending base block; 18. Bending top block; 21. Mounting groove; 22. Spring; 23. Embedded block; 24. First filler; 25. Cutting tool holder; 26. Cutting tool; 27. Clamping base block; 28. Clamping top block; 29. ​​Second filler; 29a. Protruding end; 30. Waste outlet. Detailed Implementation

[0036] The present application will now be described in detail with reference to the accompanying drawings.

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0038] The novel three-dimensional bending tooling for external water shearing, as described in Example 1. Figure 1As shown: The system includes a base 1, on which a clamping assembly 2 is mounted. Bending modules 3 are located on both sides of the clamping assembly 2, and bending components 4 are located on the outer sides of each bending module 3. A forming groove 5 is provided on the front side of each bending module 3, and the inner bottom surface of the forming groove 5 forms the reference surface for bending and forming the sealing strip 9. A cutting assembly 6 is mounted on the outer end face of each bending module 3. Two punching cutters 7 are symmetrically mounted inside the clamping assembly 2. The cutting assembly 6, punching cutters 7, and bending components 4 are each connected to a power unit. Integrating the bending module 3, cutting assembly 6, and punching cutters 7 onto the same base 1 achieves miniaturization and compactness of the equipment, reducing the floor space required for production. Driving the bending assembly 4, cutting assembly 6, and punching cutters 7 with the power unit automates the bending and cutting processes, reducing manual intervention. This reduces human error, improves production stability and product consistency, and simultaneously reduces labor costs.

[0039] The middle part of the sealing strip 9 to be processed is mounted on the clamping assembly 2, and both ends of the sealing strip 9 to be processed are fixed by the bending assemblies 4 on both sides. The power unit drives the bending assemblies 4 to move the sealing strip 9 to be processed into the forming groove 5 and contact the inner bottom surface of the forming groove 5. The cutting assembly 6 and the punching cutter 7 work to cut the sealing strip 9 located in the forming groove 5 to obtain two curved sealing strips 9. This application integrates the bending and cutting processes into the same tooling, realizing "one-time clamping, synchronous forming and cutting", which significantly simplifies the production process, reduces the process changeover time, and improves production efficiency. This application completes the cutting directly in the forming groove 5 of the bending module 3, avoiding secondary positioning and ensuring the consistency of cutting accuracy and bending forming.

[0040] Example 2, as Figures 1 to 5 As shown, the bending module 3 includes a base plate 10 and a top plate 11. The top plate 11 is stacked on top of the base plate 10, and the bottom surface of the top plate 11 and the top surface of the base plate 10 together form a forming groove 5. A pressing cylinder 12 is connected to the top plate 11. The pressing cylinder 12 drives the top plate 11 to move and change the opening size of the forming groove 5. By driving the top plate 11 to move through the pressing cylinder 12, the opening size of the forming groove 5 can be flexibly adjusted, facilitating the embedding of the sealing strip 9. The inner bottom surface of the forming groove 5 serves as the reference surface for bending, ensuring that the sealing strip 9 is in close contact with the reference surface during the bending process, thus improving the forming accuracy.

[0041] A base plate 13 is vertically mounted on the base 1. A linear guide rail 14 is provided on the front side of the base plate 13. The top plate 11 is movably mounted on the linear guide rail 14 via a slider 15. A pressing cylinder 12 is mounted on the base plate 13. The pressing cylinder 12 drives the top plate 11 to move up and down along the linear guide rail 14. The linear guide rail 14 restricts the movement trajectory of the top plate 11, ensuring that the top plate 11 remains stable during up and down movement, avoiding deviation or shaking, and improving molding accuracy. Driving the top plate 11 along the linear guide rail 14 with a cylinder achieves automated operation, reduces manual intervention, and improves production efficiency.

[0042] The bending assembly 4 includes a bending slide rail, a bending base block 17, and a bending top block 18. The bending base block 17 is mounted on the bending slide rail and moves along the slide rail under the action of a power device. The bending top block 18 is mounted above the bending base block 17 and moves up and down under the action of the power device to change the distance between it and the bending base block 17. The bending slide rail limits the direction and displacement of movement of the bending base block 17, ensuring stability and consistency throughout the bending process and improving the bending accuracy of the sealing strip 9.

[0043] Both the top surface of the bending base block 17 and the bottom surface of the bending top block 18 are provided with teeth. The bottom surface of the bending top block 18 and the top surface of the bending base block 17 can interlock. The top surface of the bending base block 17 has an installation groove 21. An insert block 23 is connected to the installation groove 21 by a spring 22. One end face of the insert block 23 is adapted to the inner wall surface of the sealing strip 9. The one end face of the insert block 23 is floating on the bending base block 17 by the spring 22. When the bending base block 17 moves towards the sealing strip 9 along the bending slide rail, the insert block 23 extends into the sealing strip 9 to fill the area of ​​the sealing strip 9. Then, the bending top block 18 presses down to solidify the sealing strip 9 at this point. The setting of the insert block 23 can effectively reduce the stress deformation at the solidified point of the sealing strip 9. The toothed design makes the interlocking between the bending top block 18 and the bending base block 17 more tight, ensuring that the sealing strip 9 is firmly fixed during the bending process and improving the forming quality.

[0044] The rest of the contents of Example 2 are the same as those of Example 1.

[0045] Example 3, as Figures 1 to 5 As shown, a first filler 24 connected to a power device is provided at the outer end of the bending module 3. One end of the first filler 24 is adapted to the inner wall surface of the sealing strip 9, and the outer side of the first filler 24 is flush with the outer end face of the bending module 3. The adaptation of the first filler 24 to the inner wall surface of the sealing strip 9 provides additional support during the bending and cutting processes, preventing the sealing strip 9 from collapsing or deforming during processing. The flushness of the outer side of the first filler 24 with the outer end face of the bending module 3 ensures that the cutting component 6 can be accurately positioned during the cutting process, improving cutting accuracy.

[0046] The cutting assembly 6 includes a cutting blade holder 25 and a cutting blade 26. The cutting blade 26 is mounted on the cutting blade holder 25 and moves along the cutting blade holder 25 under the drive of a power device. Driven by the power device, the cutting blade 26 moves against the outer end face of the bending module 3 to cut the sealing strip 9. The movement of the cutting blade 26 against the outer end face of the bending module 3 and the setting of the cutting blade holder 25 are both for improving cutting accuracy. This application integrates the cutting assembly 6 and the bending module 3, avoiding the problem of separating the bending and cutting processes in traditional processes and reducing process changeover time.

[0047] The clamping assembly 2 includes a clamping base block 27 and a clamping top block 28. The clamping top block 28 is mounted above the clamping base block 27 and moves up and down under the action of a power device to change the distance between it and the clamping base block 27. Both the top surface of the clamping base block 27 and the bottom surface of the clamping top block 28 are provided with teeth, and the bottom surface of the clamping top block 28 and the top surface of the clamping base block 27 can interlock. The interlocking of the clamping top block 28 and the clamping base block 27 through the teeth ensures that the sealing strip 9 is firmly fixed during processing, preventing slippage or displacement. Specifically, in this application, the force applied to the sealing strip 9 by the clamping top block 28 and the clamping base block 27 is on the section of waste material that needs to be cut off from the sealing strip 9, and will not affect the finished sealing strip 9.

[0048] A second filler 29, connected to a power unit, is provided on the outer side of the clamping base block 27. The second filler 29 has two protruding ends 29a that conform to the inner wall surface of the sealing strip 9, and the opposite sides of the two protruding ends 29a are flat. Two punching tools 7 penetrate the clamping top block 28 and move along the protruding ends 29a. The protruding ends 29a of the second filler 29 conform to the inner wall surface of the sealing strip 9, providing additional support during punching and preventing deformation of the sealing strip 9. The punching tools 7 move along the protruding ends 29a, ensuring precise punching position and improving punching accuracy.

[0049] The clamping base block 27 has a waste discharge port 30. The waste discharge port 30 allows waste generated during the punching process to be discharged in a timely manner, reducing waste cleaning time and improving production efficiency. It also prevents waste accumulation from affecting processing accuracy and equipment operation.

[0050] The other contents of Example 3 are the same as those of Example 1 or Example 2.

[0051] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A novel tooling for external water shearing and three-dimensional bending, characterized in that: The system includes a base (1), on which a clamping assembly (2) is mounted. Bending modules (3) are provided on both sides of the clamping assembly (2), and bending components (4) are provided on the outer sides of the bending modules (3). A forming groove (5) is provided on the front side of the bending module (3), and the inner bottom surface of the forming groove (5) forms the reference surface for the bending forming sealing strip (9). A cutting assembly (6) is installed on the outer end face of the bending module (3), and two punching tools (7) are symmetrically installed inside the clamping assembly (2). The cutting assembly (6)... The punching tool (7) and the bending assembly (4) are respectively connected to the power unit; the middle part of the sealing strip (9) to be processed is installed on the clamping assembly (2), and the two ends of the sealing strip (9) to be processed are respectively fixed by the bending assemblies (4) on both sides. The power unit drives the bending assembly (4) to move the sealing strip (9) to be processed into the forming groove (5) and contact the inner bottom surface of the forming groove (5). The cutting assembly (6) and the punching tool (7) work to cut the sealing strip (9) located in the forming groove (5) to obtain two curved sealing strips (9).

2. The novel tooling for external water shearing and three-dimensional bending according to claim 1, characterized in that, The bending module (3) includes a bottom plate (10) and a top plate (11). The top plate (11) is stacked on top of the bottom plate (10). The bottom surface of the top plate (11) and the top surface of the bottom plate (10) together form a forming groove (5). A pressing cylinder (12) is connected to the top plate (11). The pressing cylinder (12) drives the top plate (11) to move and change the opening size of the forming groove (5).

3. The novel tooling for external water shearing and three-dimensional bending according to claim 2, characterized in that, A base plate (13) is vertically arranged on the base (1). A linear guide rail (14) is arranged on the front side of the base plate (13). The top plate (11) is movably mounted on the linear guide rail (14) via a slider (15). The pressing cylinder (12) is mounted on the base plate (13). When the pressing cylinder (12) works, it drives the top plate (11) to move up and down along the linear guide rail (14).

4. The novel tooling for external water shearing and three-dimensional bending according to claim 1, characterized in that, The bending assembly (4) includes a bending slide rail, a bending base block (17), and a bending top block (18). The bending base block (17) is installed on the bending slide rail and moves along the bending slide rail under the action of a power device. The bending top block (18) is installed above the bending base block (17) and moves up and down under the action of a power device to change the distance between it and the bending base block (17).

5. The novel tooling for external water shearing and three-dimensional bending according to claim 4, characterized in that, The top surface of the bending base block (17) and the bottom surface of the bending top block (18) are both provided with teeth. The bottom surface of the bending top block (18) and the top surface of the bending base block (17) can interlock with each other. The top surface of the bending base block (17) is provided with an installation groove (21). An embedded block (23) is connected in the installation groove (21) by a spring (22). One side end face of the embedded block (23) is adapted to the inner wall surface of the sealing strip (9). One side end face of the embedded block (23) is floating on the bending base block (17) by the spring (22).

6. The novel tooling for external water shearing and three-dimensional bending according to claim 1, characterized in that, The outer end of the bending module (3) is provided with a first filler (24) connected to the power device. One end of the first filler (24) is adapted to the inner wall surface of the sealing strip (9), and the outer side surface of the first filler (24) is flush with the outer end surface of the bending module (3).

7. The novel tooling for external water shearing and three-dimensional bending according to claim 1, characterized in that, The cutting assembly (6) includes a cutting knife holder (25) and a cutting knife (26). The cutting knife (26) is mounted on the cutting knife holder (25). The cutting knife (26) moves along the cutting knife holder (25) under the drive of the power device. The cutting knife (26) moves to cut the sealing strip (9) against the outer end face of the bending module (3) under the drive of the power device.

8. The novel tooling for external water shearing and three-dimensional bending according to claim 1, characterized in that, The clamping assembly (2) includes a clamping base block (27) and a clamping top block (28). The clamping top block (28) is installed above the clamping base block (27) and moves up and down under the action of a power device to change the distance between it and the clamping base block (27). The top surface of the clamping base block (27) and the bottom surface of the clamping top block (28) are both provided with teeth. The bottom surface of the clamping top block (28) and the top surface of the clamping base block (27) can mesh with each other.

9. The novel tooling for external water shearing and three-dimensional bending according to claim 8, characterized in that, The outer side of the clamping base block (27) is provided with a second filler (29) connected to the power device. The second filler (29) is provided with two protruding ends (29a) that are adapted to the inner wall surface of the sealing strip (9). The sides opposite to the two protruding ends (29a) are flat. The two punching tools (7) respectively pass through the clamping top block (28) and move in contact with the protruding ends (29a).

10. The novel tooling for external water shearing and three-dimensional bending according to claim 8, characterized in that, The clamping base block (27) has a waste outlet (30).

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