A punching device for metal pipe processing

Abstract

The present invention belongs to the technical field of metal tube punching, and specifically discloses a punching device for metal tube processing, comprising: a conveying platform, on the upper surface of which a track for conveying the metal tube is installed; a bending portion is installed on the conveying platform through a two-axis platform, and the bending portion is used to bend the metal tube; a first punching end is installed on the conveying platform; the first punching end is used to process a hole body on the circumferential side wall of the metal tube, and the inner diameter of the hole body is smaller than the preset inner diameter of the forming hole; the hole body is located at an extended part of the metal tube in the bending; the second punching end is installed on the two-axis platform through a single-axis platform, and the single-axis platform is used to drive the second punching end to approach or move away from the bending portion; the second punching end is used to process the inner diameter of the hole body to the preset inner diameter of the forming hole when the metal tube is bent; it has the following advantages: significantly improving the accuracy of the hole body, reducing deformation and damage during bending, reducing tool wear, and improving processing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of metal pipe punching, and in particular to a punching device for metal pipe processing. Background Art

[0002] In the existing metal tube processing technology, the order of punching and bending operations has an important impact on the quality of the final product and processing efficiency. Generally, there are two common process paths when punching a metal tube at a bend: punching first and then bending, or bending first and then punching.

[0003] If you choose to punch holes before bending, the holes of the metal pipe may be slightly deformed due to stress concentration, local compression or stretching during the bending process. These deformations may cause deviations in the shape and size of the holes, thereby affecting the processing accuracy and even the performance and appearance of the product. Specifically, when the pipe is bent, the deformation of the inner and outer walls may cause the position of the pre-punched holes to change, resulting in inconsistent hole diameters or deformation of the hole shape, which in turn affects subsequent assembly or use.

[0004] On the other hand, if you choose to bend first and then punch, the shape of the pipe after bending becomes complicated, which brings additional challenges to the subsequent punching operation. During this process, the inner and outer walls of the bent part will produce uneven stress distribution, which may lead to a decrease in the accuracy and quality of the hole when punching. In addition, since the pipe is already bent, the punching tool must operate on a complex curved surface, which not only increases the risk of tool wear, but also may make it difficult to accurately control the position of the hole, further affecting the size and shape of the hole.

[0005] Therefore, when punching holes in the bend of a metal tube in the prior art, whether the punching is done first and then bending, or bending is done first and then punching, there are problems to varying degrees. These problems include hole shape deformation, hole position deviation, difficulty in precision control, increased tool wear, etc., which seriously affect processing efficiency and product quality.

[0006] Therefore, a punching device for metal pipe processing is proposed to solve the above-mentioned problems. Summary of the invention

[0007] The present invention aims to provide a punching device for metal tube processing to solve or improve the above-mentioned technical problems that the existing punching technology for metal tube bending has problems such as hole deformation, hole position deviation, difficulty in precision control and increased tool wear, which seriously affect processing efficiency and product quality.

[0008] In view of this, a first aspect of the present invention is to provide a punching device for metal pipe processing.

[0009] The first aspect of the present invention provides a punching device for metal tube processing, comprising: a conveying platform, on the upper surface of which a track for conveying the metal tube is installed; along the conveying direction of the metal tube on the track, a bending portion is installed on the conveying platform through a two-axis platform, and the bending portion is used to bend the metal tube; a first punching end is installed on the conveying platform; the first punching end is used to process a hole body on the circumferential side wall of the metal tube, and the inner diameter of the hole body is smaller than the preset inner diameter of the forming hole; the hole body is located at the extended part of the metal tube bend; the second punching end is installed on the two-axis platform through a single-axis platform, and the single-axis platform is used to drive the second punching end to approach or move away from the bending portion; the second punching end is used to process the inner diameter of the hole body to the preset inner diameter of the forming hole when the metal tube is bent.

[0010] In any of the above technical solutions, the bending part includes: a bending wheel, whose circumferential outer wall is provided with a first groove adapted to the metal tube; a driving motor installed on the moving end of the two-axis platform; the output end of the driving motor is connected to the bending wheel to drive the bending wheel to rotate; the two-axis platform is used to drive the bending wheel to move in two directions respectively.

[0011] In any of the above technical solutions, the second punching end includes: a slide, installed on the movable end of the single-axis platform; the slide is used to clamp the metal tube together with the bending wheel when the bending wheel rotates; an expansion part, installed on the slide; the expansion part includes a rod body with a diameter not less than the inner diameter of the hole body.

[0012] In any of the above technical solutions, the slide table includes: a slide seat connected to the moving end of the single-axis platform; a slide groove is provided on the lower surface of the slide seat; a slider is slidably installed in the slide groove; the side wall of the slider is connected to the rod body to drive the rod body to follow the movement of the metal tube.

[0013] In any of the above technical solutions, a second groove is provided on the lower surface of the sliding block, and the second groove and the first groove together form an arc-shaped cavity for accommodating the bent portion of the metal tube.

[0014] In any of the above technical solutions, the lower surface of the slider is arc-shaped; when the slider abuts against the bending wheel, the bending wheel drives the slider to move relative to the slide seat.

[0015] In any of the above technical solutions, the reaming portion further includes an adjustment frame, which is installed on the end of the slider; a ring body is detachably mounted on the adjustment frame, and the ring body is sleeved on the rod body.

[0016] In any of the above technical solutions, the slide also includes a spring, the ends of which are respectively connected to the side walls of the slide seat and the side walls of the slider, and the spring is used to drive the slider to reset when the slider is separated from the bending wheel.

[0017] In any of the above technical solutions, the bottom end of the rod body is in a trapezoidal shape, so that when the extended portion is stretched, the inner diameter of the hole body located at the extended portion is gradually expanded to the preset inner diameter of the formed hole.

[0018] In any of the above technical solutions, a clamp for clamping the metal pipe is installed on the conveying platform between the bending portion and the first punching end.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] By performing preliminary punching before bending the metal tube, and fine processing by the second punching end after the metal tube is bent, the inner diameter of the pre-processed hole is accurately adjusted to the preset inner diameter of the formed hole, which significantly improves the accuracy of the hole. The two-step punching method effectively solves the problem of irregular hole shape or size deviation caused by deformation of the metal tube during bending in the traditional punching method.

[0021] Since the first punching end processes a hole body on the circumferential side wall of the metal tube, and the inner diameter of the hole body is designed to be smaller than the inner diameter of the preset forming hole, when the metal tube is bent, the hole body can be properly stretched in the extended part, reducing the uneven stress and deformation of the hole body caused by the bending of the metal tube. The design effectively reduces the risk of damage to the hole body during the bending process. In addition, when the metal tube is bent, the second punching end further expands the inner diameter of the hole body through further processing, which can reduce resistance during the hole expansion process. Since the inner diameter of the hole body naturally increases when bending, the working efficiency of the second punching end is improved, and the hole expansion resistance is reduced, thereby making the hole expansion process smoother, reducing wear on the tool, and extending the service life of the equipment.

[0022] Additional aspects and advantages of embodiments according to the present invention will become apparent in the following description or may be learned through practice of embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a front view of the present invention;

[0026] Figure 3is a side view of the present invention;

[0027] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0028] in, Figure 1-Figure 4 The corresponding relationship between the reference numerals and the component names is as follows:

[0029] 1 conveying platform, 2 two-axis platform, 3 bending part, 301 bending wheel, 3011 first groove, 302 driving motor, 4 metal tube, 5 first punching end, 6 second punching end, 601 sliding seat, 602 slider, 6021 second groove, 603 rod body, 604 adjustment frame, 605 ring body, 606 spring, 7 single-axis platform, 8 clamp, 9 moving clamp. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0032] See also Figure 1-Figure 4 , a punching device for metal tube processing according to some embodiments of the present invention is described below.

[0033] The embodiment of the first aspect of the present invention provides a punching device for metal tube processing. In some embodiments of the present invention, such as Figure 1-Figure 4 As shown, the punching device comprises:

[0034] The conveying platform 1 has a track for conveying the metal pipe 4 installed on its upper surface; along the conveying direction of the metal pipe 4 on the track, a bending portion 3 is installed on the conveying platform 1 through a two-axis platform 2, and the bending portion 3 is used to bend the metal pipe 4.

[0035] The first punching end 5 is installed on the conveying platform 1; the first punching end 5 is used to process a hole body on the circumferential side wall of the metal tube 4 to form a pre-punched hole, and the inner diameter of the hole body is smaller than the preset inner diameter of the forming hole, so as to provide additional processing redundancy in actual bending; the hole body is located in the extended part of the metal tube 4 in the bend, and by processing the hole body in the extended part, a certain degree of stretching can be obtained in the bending, and the processing pressure and wear can be reduced.

[0036] The second punching end 6 is installed on the two-axis platform 2 through the single-axis platform 7, and the single-axis platform 7 is used to drive the second punching end 6 to approach or move away from the bending portion 3; the second punching end 6 is used to process the inner diameter of the hole body to the preset inner diameter of the forming hole when the metal tube 4 is bent, so as to further correct the pre-processed punching structure to the expected hole body.

[0037] The present invention provides a punching device for processing a metal tube 4. The conveying platform 1 is the basic support part of the device, and its main function is to provide a stable plane so that the metal tube 4 can be smoothly conveyed thereon. A track for conveying the metal tube 4 is installed on the upper surface of the conveying platform 1. The function of the track is to guide the metal tube 4 to move in a predetermined direction to ensure that the metal tube 4 can enter the punching and bending processing area in a set order. The combination of the conveying platform 1 and the track ensures that the metal tube 4 can smoothly transition during the processing process, avoiding processing errors caused by poor sliding or position offset.

[0038] The bending part 3 is a component installed on the conveying platform 1, and is located in the conveying direction of the metal pipe 4 on the track. Through the cooperation of the two-axis platform 2, the bending part 3 can bend the metal pipe 4. The metal pipe 4 is bent at a certain angle according to the requirements to form the required pipe shape. The bending part 3 controls the bending angle and curvature of the metal pipe 4 to ensure that the shape of the metal pipe 4 meets the process requirements.

[0039] The first punching end 5 is installed on the conveying platform 1 and is arranged along the conveying direction of the metal tube 4. It is responsible for performing preliminary punching on the circumferential side wall of the metal tube 4. A hole body is processed in the extended part of the metal tube 4. The inner diameter of the hole body is smaller than the preset inner diameter of the forming hole, providing additional processing redundancy and providing space for subsequent bending processing. In the actual bending process, the tube wall of the metal tube 4 at the bending position will be stretched to a certain extent. The hole body can be stretched appropriately due to the redundant part to avoid deformation of the hole or dimensional deviation. Punching can not only effectively reduce the pressure of subsequent punching, but also reduce the wear of the punching tool, thereby improving processing efficiency and extending tool life.

[0040] The second punching end 6 is installed on the two-axis platform 2 through the single-axis platform 7. The function of the single-axis platform 7 is to drive the second punching end 6 to approach or move away from the bending portion 3, thereby adjusting the punching position and depth to adapt to the shape of the metal tube 4 after bending. After the metal tube 4 is bent, the inner diameter of the hole body is further processed to the preset inner diameter of the forming hole. Through this process, the pre-processed hole body is accurately corrected to meet the predetermined hole shape and size. The processing of the second punching end 6 helps to eliminate the problem of irregular hole shape that may be caused by stress concentration during the bending process, thereby ensuring the accuracy and quality of the final hole body. The flexibility of this punching end enables the equipment to adapt to metal tubes 4 with different bending angles, further improving the versatility and adaptability of the equipment.

[0041] The conveying platform 1 guides the metal tube 4 into the bending part 3 through the track to ensure that the metal tube 4 enters the processing area in order. By accurately controlling the bending angle of the metal tube 4, the correct bending shape is provided for the subsequent punching operation. Ensure that the metal tube 4 maintains a suitable shape after bending, and provide an ideal processing environment for the second punching end 6. The first punching end 5 is responsible for processing the preliminary hole body on the circumferential side wall of the metal tube 4. The design of the hole body fully considers the deformation characteristics of the metal tube 4 in the subsequent bending. The inner diameter redundancy design of the hole body provides sufficient space for bending. The second punching end 6 accurately corrects the size of the hole body after the metal tube 4 is bent to ensure that the hole body meets the preset inner diameter of the forming hole. The first punching end 5 and the second punching end 6 cooperate with each other. The first punching end 5 provides a redundant hole body structure, while the second punching end 6 is refined during bending to ensure that the final processing result meets the requirements. The bending part 3 changes the shape of the pipeline and introduces certain stress by bending the metal tube 4, thereby affecting the shape of the hole body. When the first punching end 5 processes the preliminary hole before bending, the redundant hole is designed to take into account the deformation effect of subsequent bending. The second punching end 6 further corrects the inner diameter of the hole after bending to eliminate the irregular hole shape that may be caused during the bending process. The coordinated work of the two ensures the processing accuracy and the stability of the shape of the metal tube 4.

[0042] In summary, the problems of hole shape deformation, reduced precision and tool wear during the bending process of the metal tube 4 are effectively solved. By rationally designing the redundant holes and correcting them after bending, the punching accuracy is ensured, the wear of the equipment is reduced, and the processing efficiency is improved.

[0043] In any of the above embodiments, the bending portion 3 includes:

[0044] The bending wheel 301 has a first groove 3011 on its circumferential outer wall adapted to the metal tube 4 to reduce damage to the tube wall shape of the metal tube 4 during bending.

[0045] The driving motor 302 is installed at the moving end of the two-axis platform 2; the output end of the driving motor 302 is connected to the bending wheel 301 to drive the bending wheel 301 to rotate; the two-axis platform 2 is used to drive the bending wheel 301 to move in two directions respectively, so as to realize continuous bending operation of the metal tube 4 with a large arc.

[0046] In this embodiment, the bending wheel 301 is located in the device for actually bending the metal tube 4. The circumferential outer wall of the bending wheel 301 is provided with a first groove 3011 adapted to the metal tube 4. The main purpose of the groove design is to provide necessary support for the pipe during the bending process of the metal tube 4 to avoid the destruction of the pipe wall shape due to excessive stress generated by bending. Specifically, the shape of the first groove 3011 matches the outer diameter of the metal tube 4 and the material properties of the pipe to ensure that the outer wall of the pipe can be evenly stressed, thereby reducing the deformation caused by stress concentration during the bending process. Through this design, the bending wheel 301 can effectively guide the metal tube 4 to move along a predetermined bending path, and minimize the surface damage and internal stress of the pipe during the bending process. It can also help to evenly distribute the force applied to the metal tube 4, reduce damage to the pipe wall, and make the shape of the pipe after bending more precise and the surface smoother. With regard to the adaptability of the material of the metal tube 4, the size and shape of the first groove 3011 can be customized according to different metal tube 4 materials (such as stainless steel, aluminum alloy, etc.) to meet the needs of different pipes.

[0047] The driving motor 302 provides a power source and drives the bending wheel 301 to rotate by connecting the output end. It ensures that the bending wheel 301 can rotate according to the set speed and force, so that the metal tube 4 can smoothly complete the bending process. The function of the two-axis platform 2 is to accurately control the movement direction of the bending wheel 301. By controlling the movement of the bending wheel 301 in two directions, continuous bending operations with a large arc can be achieved. The cooperation between the bending wheel 301 and the two-axis platform 2 ensures that the metal tube 4 can maintain a stable shape during the bending process and avoid excessive local stress concentration. The bending wheel 301 contacts the metal tube 4 through the first groove 3011 on its outer wall, ensuring that the metal tube 4 can be subjected to uniform force during the bending process, thereby effectively reducing the deformation and damage of the tube wall. The design of the groove not only reduces stress concentration during bending, but also helps the metal tube 4 maintain a smooth curve shape.

[0048] Specifically, a movable clamp 9 is installed on the conveying platform 1 through a slide rail to assist in driving the metal pipe 4 .

[0049] In any of the above embodiments, the second punching end 6 comprises:

[0050] The slide is installed on the moving end of the single-axis platform 7; the slide is used to clamp the metal tube 4 together with the bending wheel 301 when the bending wheel 301 rotates, ensuring that the pre-punched part is locked during the bending process.

[0051] The hole expansion part is mounted on the slide; the hole expansion part includes a rod body 603 with a diameter not less than the inner diameter of the hole body, which is used for the final hole body forming.

[0052] In this embodiment, the slide is mounted on the moving end of the uniaxial platform 7, and its main function is to cooperate with the bending wheel 301 to clamp the metal tube 4 during the bending process. The design of the slide enables it to work together with the bending wheel 301 when the bending wheel 301 rotates to clamp the metal tube 4 in a fixed position. In this way, during the bending process of the metal tube 4, the slide can provide stable support for the metal tube 4, ensuring that the metal tube 4 will not be offset during processing, thereby maintaining the accuracy of the punching position. The main function of the slide is to lock the pre-punched part on the metal tube 4. After the metal tube 4 is bent, the original pre-punched hole may be offset or deformed due to the deformation during the bending process. The slide can ensure that the punching part always maintains the correct position during the processing process through precise control, and avoids the punching deviation caused by bending. The stability and precise mobility of the slide are the basis for ensuring that the second punching end 6 can effectively carry out subsequent processing. The cooperation between the slide and the single-axis platform 7 enables the slide to precisely cooperate with the bending wheel 301 during the processing, thereby ensuring that the metal tube 4 is always in a predetermined position during the processing.

[0053] The hole expansion unit is a component installed on the slide, which is responsible for further hole expansion processing of the pre-punched hole of the metal tube 4 to ensure that the size and shape of the final hole body meet the predetermined requirements. The design of the hole expansion unit includes a rod body 603 with a diameter not less than the inner diameter of the hole body, and its function is to form the required inner diameter of the hole body by accurately controlling the expansion of the hole. In the structural changes after the metal tube 4 is bent, the position and size of the pre-punched hole may change to a certain extent, and the hole expansion unit can correct these changes through further processing to ensure the accuracy and consistency of the hole body. The rod body 603 of the hole expansion unit is not only provided for hole diameter expansion, but also ensures that the shape of the hole remains regular by applying appropriate pressure to the metal tube 4 during the processing process, and will not be deformed due to the uneven stress of the inner and outer walls generated during the bending process. Through this process, the hole expansion unit can adjust the pre-punched hole body to the inner diameter required by the design, avoiding the problem of irregular hole shape or insufficient precision.

[0054] The stable clamping action of the slide ensures that the metal tube 4 will not be displaced due to external forces during the bending process, which enables the reaming part to perform the reaming operation at the correct position. With the support of the slide, the reaming part can act on the pre-punching part of the metal tube 4 to ensure the accuracy and consistency during the reaming process. Specifically, the slide ensures that the metal tube 4 can always maintain the correct position when the reaming part operates, so that the reaming part can adjust the hole body at the position of the metal tube 4 after bending. The rod body 603 of the reaming part further corrects and optimizes the shape of the hole body by contacting the metal tube 4 to ensure that the final formed hole diameter meets the design standards.

[0055] In any of the above embodiments, the slide comprises:

[0056] The slide seat 601 is connected to the moving end of the single-axis platform 7; a slide groove is provided on the lower surface of the slide seat 601.

[0057] The slider 602 is slidably installed in the slide groove; the side wall of the slider 602 is connected to the rod body 603 to drive the rod body 603 to move with the metal tube 4 to avoid interference between the rod body 603 and the bending of the metal tube 4 when processing the hole body.

[0058] In this embodiment, the slide 601 is installed at the moving end of the single-axis platform 7 and is closely connected to the motion structure of the single-axis platform 7. The function of the slide 601 is to support the entire slide structure and provide a sliding track for the slider 602 and the rod body 603. A slide groove is provided on the lower surface of the slide 601, and the slide groove provides a stable sliding path for the slider 602. Through the design of the slide groove, the slider 602 can move along the predetermined track during the processing, thereby maintaining the relative position relationship between the metal tube 4 and the expansion part. It not only supports the structure of the entire slide, but also ensures that the slider 602 can slide smoothly in the slide groove. The connection method between the slide 601 and the single-axis platform 7 ensures that the slide can move synchronously with the metal tube 4, avoiding errors during the processing. The slide groove on the lower surface of the slide 601 plays a guiding role, maintaining the motion trajectory of the slider 602 in the horizontal or vertical direction, and providing basic support for the precise processing of the metal tube 4.

[0059] The function of the slider 602 is to achieve smooth movement along the direction of the slide groove by slidingly installing it in the slide groove. The side wall of the slider 602 is connected to the rod body 603 of the hole expansion part, ensuring that the hole expansion part can move synchronously with the movement of the slider 602. During the bending process of the metal tube 4, the movement of the slider 602 enables the hole expansion part to follow the shape change of the metal tube 4 for processing, thereby avoiding the processing error caused by the bending of the metal tube 4. The connection between the side wall of the slider 602 and the rod body 603 ensures that the hole expansion part remains stable throughout the entire bending process. The sliding of the slider 602 is coordinated with the movement of the metal tube 4, avoiding interference of the rod body 603 when the metal tube 4 is bent. In particular, when the metal tube 4 is bent, the slider 602 can effectively adjust its position so that the hole expansion part always remains in the correct working position to ensure the forming accuracy of the hole body.

[0060] The mutual cooperation between the slide 601 and the slider 602 ensures the stability and movement accuracy of the slide. The slide groove of the slide 601 provides guidance for the slider 602, so that it can slide smoothly in the predetermined track. The close cooperation between the slide 601 and the slider 602 avoids the lateral deviation of the slider 602, thereby ensuring that the slider 602 can move accurately along the direction of the slide groove. When the slide 601 moves on the single-axis platform 7, the slider 602 moves in the slide groove accordingly, thereby realizing the synchronous movement of the expansion part. The slide 601 fixes the position of the slider 602, so that the slider 602 maintains a stable connection with the rod body 603, and enables it to stably drive the expansion part to adjust the hole body as the metal tube 4 moves.

[0061] The connection between the side wall of the slider 602 and the rod body 603 ensures that the reaming part can follow the movement of the slider 602 and move with the change of the metal tube 4. The function of the rod body 603 is the main driving part of the reaming part, ensuring the completion of the reaming process. Through the cooperation between the slider 602 and the rod body 603, the reaming part can form a hole on the metal tube 4. The slider 602 drives the rod body 603 to follow the movement of the metal tube 4, avoiding the interference of the rod body 603 with the tube wall when the metal tube 4 is bent, so that the reaming part can perform efficient hole processing in the bending area of ​​the metal tube 4.

[0062] In any of the above embodiments, the lower surface of the slider 602 is provided with a second groove 6021 , and the second groove 6021 and the first groove 3011 together form an arc-shaped cavity for accommodating the bending portion 3 of the metal tube 4 , so as to be processed into an ideal bending shape of the metal tube 4 .

[0063] In this embodiment, the first groove 3011 and the second groove 6021 work together to form an arc-shaped cavity for accommodating the bending portion 3 of the metal tube 4, ensuring that the metal tube 4 can be uniformly deformed along a predetermined curve during the entire bending process, while also reducing the problem of surface damage or stress concentration caused by bending. Through the arc-shaped cavity, all deformations of the metal tube 4 during bending are guided to the inside of the cavity, avoiding excessive external forces and making the bending process of the pipe smoother. In the bending area of ​​the metal tube 4, the risk of stress concentration is effectively reduced, ensuring that the shape of the pipe after bending does not deviate from the predetermined path.

[0064] In any of the above embodiments, the lower surface of the slider 602 is arc-shaped and compatible with the bending wheel 301; when the slider 602 abuts against the bending wheel 301, the bending wheel 301 drives the slider 602 to move relative to the slide seat 601, and can continuously lock the hole part that needs to be processed during rotational bending.

[0065] In this embodiment, the lower surface of the slider 602 is designed to be arc-shaped, so that it can be adapted to the bending wheel 301, ensuring that the slider 602 can stably follow the movement trajectory of the bending wheel 301 during the bending process of the metal tube 4. The arc-shaped design not only increases the contact area between the slider 602 and the bending wheel 301, but also effectively reduces the friction and stress concentration on the surface of the metal tube 4, thereby reducing the deformation or damage caused by uneven friction or improper contact. When the slider 602 abuts against the bending wheel 301, the rotation of the bending wheel 301 drives the slider 602 to move relative to the slide 601. During the rotation of the bending wheel 301, the bending wheel 301 drives the slider 602 to move smoothly along its predetermined track while maintaining the stability of contact with the metal tube 4. This movement enables the slider 602 to lock the hole body part that needs to be processed while the metal tube 4 is bent. At this time, it is not only a structural component that supports the metal tube 4, but also used to control the hole body processing position. Due to the cooperation between the slider 602 and the bending wheel 301 , the slider 602 can move synchronously with the bending action of the metal tube 4 , thereby ensuring that the processing position of the hole body on the metal tube 4 does not shift.

[0066] The rotation of the bending wheel 301 not only provides power for the bending of the metal tube 4, but also ensures that the slider 602 moves in a consistent manner with the metal tube 4. The hole body part of the metal tube 4 can be continuously locked during the entire bending process to prevent the deviation of the hole body position or the change of shape due to the bending or deformation of the metal tube 4. In addition, since the slider 602 moves relative to the slide 601 under the drive of the bending wheel 301, the entire slide can maintain a close fit with the bending wheel 301 during the bending process of the metal tube 4, thereby optimizing the stress distribution during the bending process of the metal tube 4. The coordination between the slider 602 and the bending wheel 301 not only provides a continuous hole body locking function during the processing process, but also improves the processing efficiency and reduces rework or damage caused by processing errors. The design of the entire structure ensures that during the bending process of the metal tube 4, the slider 602 can operate stably and can accurately lock the hole body part that needs to be processed at any time, ensuring that the quality and shape of the final processed hole body fully meet the design requirements.

[0067] In any of the above embodiments, the hole expansion portion also includes an adjustment frame 604, which is installed on the end of the slider 602; the adjustment frame 604 is detachably equipped with a ring body 605, and the ring body 605 is sleeved on the rod body 603; through the sliding adaptation of the slider 602, the rotation of the bending wheel 301 can be offset, ensuring that the rod body 603 can always correspond to the hole body that needs to be processed.

[0068] In this embodiment, the cooperation between the ring body 605 and the rod body 603 provides precise control for the expansion of the hole body. During the bending process of the metal tube 4, the role of the ring body 605 is to ensure that the rod body 603 can correctly position and expand the inner diameter of the hole body. The ring body 605 can adjust its position before processing according to the shape and bending state of the metal tube 4 to adapt to metal tubes 4 with different curvatures and diameters. Due to the detachable design of the ring body 605, the user can replace or adjust the ring body 605 according to different processing requirements to ensure that metal tubes 4 of different sizes, shapes and materials can be processed. When the slider 602 rotates with the bending wheel 301, it will drive the adjustment frame 604 and the ring body 605 to move together. The slider 602 ensures that the expansion part can always adapt to the shape of the metal tube 4. During the bending process of the metal tube 4, the rotation of the bending wheel 301 will drive the slider 602 to slide on the slide 601, and the cooperation of the adjustment frame 604 and the ring body 605 enables the rod body 603 to continuously align with the hole body as the bending changes of the metal tube 4.

[0069] Furthermore, the adjustment frame 604 is a strip-shaped annular structure, the inner wall of which is matched with the ring body 605 through a plurality of bolt holes, and the position of the ring body relative to the metal tube 4 is adjusted by the position of the bolt holes.

[0070] Specifically, the first punching end 5 adopts a structure in which multiple cylinders are arranged in multiple directions along the circumference, and the output ends of the cylinders are all directed to the preset axis position of the metal tube 4, so as to clamp and fix it at the same time during the preliminary punching. Specifically, the moving end of the cylinder is used for punching.

[0071] Further, the diameter of the rod body 603 and the diameter of the moving end of the cylinder are determined by the following formula:

[0072]

[0073] in, is the inner diameter of the preliminary punching hole, taking into account the stress effect of the metal tube 4 before bending, that is, the diameter size of the moving end of the cylinder; is the inner diameter of the final punched hole, taking into account the correction of the inner diameter increase and the influence of the rate during the bending process, that is, the diameter size of the rod body 603; and is a coefficient related to the material properties of the metal tube 4 and the bending conditions; t is the thickness of the wall of the metal tube 4; R is the bending radius; is the bending angle in radians; is the initial outer diameter of the metal tube 4; is the desired inner diameter of the forming hole; vb is the movement rate of the metal tube 4 on the bending wheel 301; k is the strain hardening coefficient, and ; E is the elastic modulus of the metal tube 4; is the total stress of the material; is the plastic strain of the material; is the yield stress of the material; The strain hardening exponent of the material is a constant; is the total strain of the material, is the value of pi, which is 3.14.

[0074] Specifically, the rod body 603 can be connected to an external hydraulic rod to provide hole expansion power.

[0075] In any of the above embodiments, the slide also includes a spring 606, the ends of which are respectively connected to the side walls of the slide seat 601 and the side walls of the slider 602, and the spring 606 is used to drive the slider 602 to reset when the slider 602 is separated from the bending wheel 301.

[0076] In this embodiment, the main function of the spring 606 is to quickly drive the slider 602 back to the initial position when the contact between the slider 602 and the bending wheel 301 is broken. When the slider 602 is in contact with the bending wheel 301, the rotation of the bending wheel 301 drives the slider 602 to move relative to the slide 601. After completing a certain bending action or processing step, the slider 602 needs to be reset. At this time, the spring 606 drives the slider 602 to return to its original position through its restoring force, so as to be ready for the next processing or adjustment. The spring 606 ensures that the slider 602 can quickly and smoothly return to the predetermined starting position without external interference. Through this process, the slider 602 can not only ensure continuous stability, but also maintain high precision in each bending process of the metal tube 4, thereby avoiding the subsequent processing effect being affected by the stay or misalignment of the slider 602.

[0077] In any of the above embodiments, the bottom end of the rod body 603 is trapezoidal, so that when the extended portion is stretched, the inner diameter of the hole body at the extended portion is gradually expanded to the preset inner diameter of the formed hole, and the inner diameter of the hole body increases when bent, which can reduce the resistance of the rod body 603 to hole expansion, so that the rod body 603 can serve as a continuous trimming of the edge of the hole body when expanding the hole.

[0078] In this embodiment, the bottom end of the rod body 603 is in a trapezoidal shape so that the rod body 603 can more effectively expand the hole body during the bending process of the metal tube 4. Specifically, the trapezoidal bottom end can gradually expand the inner diameter of the hole body, especially in the extended part of the metal tube 4. Since the metal tube 4 will deform when it is bent, especially the hole body in the bending area may be stretched, and the inner diameter of the hole will increase accordingly. The trapezoidal design matches the extended part of the metal tube 4 through its gradually expanding shape, making the change of the inner diameter of the hole body smoother, avoiding excessive deformation or irregular expansion of the hole body when it is bent.

[0079] The inclined surface and bottom structure of the trapezoidal design can provide sufficient support and effectively reduce the friction resistance between the rod body 603 and the edge of the hole body during the hole expansion process. As the inner diameter of the hole body gradually expands, the design of the trapezoidal bottom ensures that the shape of the hole body is more uniform and the hole wall is smooth, reducing the stress concentration or burr caused by hole expansion.

[0080] When the metal tube 4 is bent, the inner diameter of the hole body will usually increase, especially the hole body at the bent and extended part of the metal tube 4. In this process, the increase in the inner diameter of the hole body effectively reduces the resistance of the rod body 603 when expanding the hole. Due to the trapezoidal design at the bottom of the rod body 603, its inclined surface gradually widens, providing sufficient space and support, reducing the friction and resistance between the rod body 603 and the hole body wall when expanding the hole. This design optimizes the mechanical behavior during the expansion process, making the expansion operation more stable and efficient.

[0081] During the bending process of the metal tube 4, the stress concentration and deformation of the metal material may cause the shape of the hole to change. Therefore, the trapezoidal design at the bottom of the rod body 603 can adapt to these changes, cope with the changes in the shape of the hole by gradually expanding the inner diameter of the hole, and make the hole expansion operation easier by reducing friction resistance. In this way, the rod body 603 can slide more easily in the metal tube 4, reducing energy waste and improving the efficiency of the hole expansion process. In addition to being a tool for expanding the inner diameter of the hole, the rod body 603 has a greater function as a continuous trimming tool for the edge of the hole during the hole expansion process. Since the bending of the metal tube 4 may cause irregular shapes or burrs on the edge of the hole, the trapezoidal bottom of the rod body 603 can effectively trim the edge of the hole. The inclined surface of the trapezoidal design constantly contacts the edge of the hole during the hole expansion process, thereby grinding the edge of the hole and trimming it to the shape required by the design. This trimming effect can ensure that the edge of the hole is smoother and regular in shape, and there will be no defects caused by stress changes or friction during the hole expansion process. More importantly, the trimming function of the rod 603 can continuously make fine adjustments while the hole of the metal tube 4 is expanding, so that the edge of the hole is always uniform and the hole diameter is consistent with the preset inner diameter of the formed hole. Through this trimming function, the rod 603 not only expands the inner diameter of the hole, but also further improves the overall quality of the hole, avoids irregularities in the edge of the hole, and ensures accuracy and consistency throughout the entire processing process.

[0082] The trapezoidal bottom end closely cooperates with the stress changes during the bending process of the metal tube 4 to ensure that the expansion of the hole body is a smooth and orderly process. By matching the bent and extended part of the metal tube 4, the trapezoidal design can trim the edge of the hole body while the inner diameter of the hole body is expanded, ensuring the precise control of the shape and size of the hole body. During the hole expansion process, the design of the trapezoidal bottom end can adapt to the bending angle and morphological changes of the metal tube 4, and through the gradually expanding shape, ensure that the hole body maintains consistent quality throughout the process. The coordination effect of this design makes hole expansion not only a process of expanding the inner diameter of the hole body, but also includes the trimming and optimization of the hole body shape. During the hole expansion process, the rod body 603 can provide uniform force distribution through the gradual expansion and trimming of its trapezoidal bottom end to ensure the smoothness of the hole body expansion and the smoothness of the hole body edge.

[0083] In any of the above embodiments, a clamp 8 for clamping the metal tube 4 is installed on the conveying platform 1 between the bending portion 3 and the first punching end 5 to fix one end of the metal tube 4 when bending.

[0084] In this embodiment, the main function of the clamp 8 is to fix one end of the metal tube 4 during the bending process of the metal tube 4 to prevent the metal tube 4 from being displaced or rotated due to external forces during the bending process. The clamp 8 ensures that the metal tube 4 will not be offset or deformed during the bending process by firmly fixing one end of the metal tube 4 at a predetermined position. In particular, during the bending process, the metal tube 4 will be subjected to complex stresses. The function of the clamp 8 is to prevent the metal tube 4 from being displaced unnecessarily under these forces, thereby avoiding processing errors or inaccurate hole shapes caused by displacement. It ensures that the metal tube 4 is always in a stable state during bending, avoiding the subsequent punching process being affected by loosening or slipping of the metal tube 4. It can provide the necessary support for the metal tube 4 and ensure its accurate position, thereby providing a stable foundation for subsequent punching operations.

[0085] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0086] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A punching device for metal tube processing, characterized in that: include: A conveying platform, the upper surface of which is provided with a track for conveying the metal pipe; Along the conveying direction of the metal pipe on the track, a bending portion is installed on the conveying platform through a two-axis platform, and the bending portion is used to bend the metal pipe; A first punching end is mounted on the conveying platform; the first punching end is used to process a hole body on the circumferential side wall of the metal tube, the inner diameter of the hole body is smaller than the preset inner diameter of the forming hole; the hole body is located at the extended part of the bend of the metal tube; The second punching end is installed on the two-axis platform through a single-axis platform, and the single-axis platform is used to drive the second punching end to approach or move away from the bending portion; the second punching end is used to process the inner diameter of the hole body to a preset forming hole inner diameter when the metal tube is bent.

2. The punching device according to claim 1, characterized in that: The bending portion comprises: A bending wheel, the circumferential outer wall of which is provided with a first groove adapted to the metal tube; A driving motor is installed at the moving end of the two-axis platform; the output end of the driving motor is connected to the bending wheel to drive the bending wheel to rotate; the two-axis platform is used to drive the bending wheel to move in two directions respectively.

3. The punching device according to claim 2, characterized in that: The second punching end comprises: A slide table is mounted on the moving end of the single-axis platform; the slide table is used to clamp the metal tube together with the bending wheel when the bending wheel rotates; The hole expansion part is installed on the slide; the hole expansion part includes a rod body with a diameter not less than the inner diameter of the hole body.

4. The punching device according to claim 3, characterized in that: The slide comprises: A slide seat connected to the moving end of the single-axis platform; a slide groove is provided on the lower surface of the slide seat; A slider is slidably mounted in the slide groove; a side wall of the slider is connected to the rod body to drive the rod body to move along with the metal tube.

5. The punching device according to claim 4, characterized in that: A second groove is formed on the lower surface of the sliding block, and the second groove and the first groove together form an arc-shaped cavity for accommodating the bent portion of the metal tube.

6. The punching device according to claim 4, characterized in that: The lower surface of the slider is arc-shaped; when the slider abuts against the bending wheel, the bending wheel drives the slider to move relative to the sliding seat.

7. The punching device according to claim 4, characterized in that: The hole expansion part also includes an adjustment frame, which is installed on the end of the sliding block; a ring body is detachably mounted on the adjustment frame, and the ring body is sleeved on the rod body.

8. The punching device according to claim 4, characterized in that: The slide table also includes a spring, the ends of which are respectively connected to the side walls of the slide seat and the side walls of the slider, and the spring is used to drive the slider to reset when the slider is separated from the bending wheel.

9. The punching device according to any one of claims 3 to 8, characterized in that: The bottom end of the rod body is in a trapezoidal shape, so that when the extended portion is stretched, the inner diameter of the hole body located at the extended portion is gradually expanded to the preset inner diameter of the forming hole.

10. The punching device according to claim 1, characterized in that Between the bending portion and the first punching end, a clamp for clamping the metal pipe is installed on the conveying platform.

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