Hole punching and drawing all-in-one machine for copper pipe

Abstract

The invention is suitable for the technical field of copper pipe machining, and provides a copper pipe punching and hole drawing all-in-one machine which comprises a rack, a punching mechanism, a rotating mechanism, a hole drawing mechanism and a clamping mechanism are sequentially arranged on the rack, and all the mechanisms are coaxially connected; the punching mechanism is in transmission fit with the inclined face of the punching head through a core rod to achieve the punching action, the core rod and the guide sleeve can be adjusted in a multi-dimensional mode, and the rotating mechanism can drive the copper pipe to move axially and turn over in the circumferential direction. According to the copper pipe punching and hole drawing all-in-one machine, the punching procedure and the hole drawing procedure are integrated, manual station switching is not needed, secondary positioning errors are avoided, and the machining precision and the production efficiency are remarkably improved; through mechanical linkage design, the structure of the punching mechanism is simplified, damageable parts and maintenance cost are reduced, machining requirements of copper pipes with different pipe diameters and wall thicknesses can be flexibly met, overall tool replacement is not needed, operation is convenient and fast, large-scale production is adapted, and the intelligent level and practical value of copper pipe punching and drawing hole machining are comprehensively improved.

Description

Technical Field

[0001] This invention belongs to the field of copper tube processing technology, and in particular relates to an integrated machine for punching and drawing holes in copper tubes. Background Technology

[0002] In the production of water heaters, refrigeration equipment, and other fields, copper pipes are widely used as core connectors. In some scenarios, it is necessary to process holes in specific locations on the copper pipes to achieve pipe connections or functional expansion. To meet this processing requirement, related copper pipe punching and drawing equipment and processes have emerged, becoming key technical support for the copper pipe processing stage. Their processing efficiency and forming quality directly affect the assembly accuracy and reliability of subsequent products.

[0003] In existing copper tube processing technology, punching and drawing processes often need to be performed separately, relying on multiple machines or manual assistance to switch workstations. This not only increases equipment investment costs and space requirements but also prolongs the overall processing cycle due to the secondary workpiece positioning steps during process transitions, while also easily introducing positioning errors. Furthermore, existing equipment lacks an integrated mechanism that can simultaneously move and rotate the copper tube. For scenarios requiring hole processing at multiple locations circumferentially or axially on the copper tube, multiple disassembly and repositioning operations are necessary, resulting in cumbersome and inefficient operations.

[0004] Furthermore, in the design of punching mechanisms, existing technologies generally adopt a separate structure of "core rod positioning + independent punching head drive," which requires separate configuration of drive sources such as cylinders and motors, along with linkage mechanisms such as connecting rods and cams to control the lifting and lowering of the punching head, resulting in redundant and complex equipment structures. This type of design not only increases the number of vulnerable components such as seals, sensors, and control modules, raising the equipment manufacturing cost, but also introduces multiple failure points due to the coordination of multiple components, such as pipeline leaks, circuit faults, and coordination deviations, significantly increasing the difficulty and cost of later maintenance. At the same time, signal transmission and response delays exist when multiple drive sources work together, causing the core rod movement and punching head action to be asynchronous, limiting transmission efficiency. Especially in high-frequency processing scenarios, the reliability of continuous equipment operation is difficult to guarantee.

[0005] Therefore, there is an urgent need for an integrated, adjustable, and highly adaptable copper tube punching and drawing equipment to solve the above problems. Summary of the Invention

[0006] This invention provides an integrated punching and drawing machine for copper tubes, which aims to solve the problems of low efficiency, large positioning error, redundant punching mechanism structure, and poor adaptability caused by the separation of punching and drawing processes in existing copper tube processing. It achieves multi-process integration and a simple and efficient punching and drawing process.

[0007] The present invention is implemented as follows: a copper tube punching and drawing machine includes a frame, on which a punching mechanism, a rotating mechanism for moving and flipping the copper tube, a drawing mechanism, and a clamping mechanism for clamping the rear end of the copper tube are arranged sequentially from the front end to the rear end. The punching mechanism includes a guide sleeve and a core rod that is retractably and coaxially sleeved within the guide sleeve. The rear ends of the guide sleeve and the core rod extend through the rotating mechanism to the bottom of the punching mechanism. A guide hole is provided vertically through the rear section of the guide sleeve. A punching head is movably disposed within the guide hole. The left and right sides of the rear end of the core rod form flat guide surfaces. A guide strip with a lower front and higher rear is provided on the guide surface. A sliding groove adapted to the guide surface and the guide strip is provided within the punching head. The punching head is movably clamped within the rear end of the core rod through the sliding groove. When the core rod is pulled back and forth, the punching head moves up and down along the guide hole through the guide strip to punch the copper tube sleeved outside the guide sleeve. A mounting bracket is provided at the rear end of the top of the frame. The hole-pulling mechanism is movably mounted on the mounting bracket. The clamping mechanism is located below the hole-pulling mechanism. The rear ends of the guide sleeve and the core rod extend into the clamping mechanism. A mounting bracket is provided at the rear end of the top of the frame. The hole-pulling mechanism is movably mounted on the mounting bracket. The clamping mechanism is located below the hole-pulling mechanism. The rear ends of the guide sleeve and the core rod extend into the clamping mechanism.

[0008] Preferably, the front part of the core rod surface is provided with external threads, a limiting tube is sleeved on the front end of the core rod surface, and the two ends of the core rod surface located at the limiting tube are respectively threaded with a first nut for fixing the limiting tube.

[0009] Preferably, the punching mechanism further includes a movable plate, and the frame is provided with a first driving component that drives the movable plate to move back and forth. A mounting base is fixedly installed on the movable plate, and a first threaded hole is opened on the mounting base along the front-back direction. The surface of the limiting tube is provided with a matching external thread, and the limiting tube is installed on the mounting base by threaded connection. Second nuts that lock the position of the limiting tube are provided on both sides of the surface of the limiting tube located on the mounting base.

[0010] Preferably, the punching mechanism further includes a fixed base, the top of the fixed base has an installation groove, a fixed block is inserted into the installation groove, the fixed block has a second threaded hole along the front-back direction, and the front end of the guide sleeve surface is provided with an external thread and is installed onto the fixed block by threaded connection.

[0011] Preferably, the rotating mechanism includes a device frame that can move in a front-back direction and a second driving assembly that drives the device frame to move. A rotating cylinder that is coaxial with the guide sleeve and extends rearward is rotatably disposed on the device frame, and a gripper assembly for clamping the copper tube is disposed at the rear end of the rotating cylinder.

[0012] Preferably, the gripper assembly includes a plurality of connecting blocks hinged to the rear end of the rotating cylinder, the plurality of connecting blocks being evenly spaced at the rear end of the rotating cylinder, and each connecting block being detachably provided with a gripping block.

[0013] Preferably, the outer surface of the connecting block forms an inclined surface that is lower in the front and higher in the back, and a movable sleeve that can move back and forth is fitted on the rotating cylinder. When the movable sleeve moves backward, it squeezes the connecting block, causing the clamping block to tighten inward and achieve clamping.

[0014] Preferably, the rotating mechanism further includes a pushing assembly, which includes a pushing frame and a pushing cylinder. The pushing cylinder is hinged to the device frame. One side of the pushing frame is hinged to the device frame, and the other side is hinged to the piston rod of the pushing cylinder. The pushing cylinder extends to push the pushing frame to deflect backward. The pusher is sleeved on the outside of the movable sleeve. The movable sleeve has an annular limiting groove on its circumferential surface. The pusher is provided with a pusher wheel that extends into the limiting groove to push the movable sleeve.

[0015] Preferably, the clamping mechanism includes a base, and two clamping assemblies are symmetrically arranged on both sides of the top of the base. Each clamping assembly includes a positioning seat, an ear seat is fixedly installed on the positioning seat, a clamping cylinder is hinged to the ear seat, a first connecting rod is also hinged to the positioning seat, the other end of the first connecting rod is hinged to a second connecting rod through a hinge shaft, the piston rod end of the clamping cylinder is hinged to the hinge shaft, and the other end of the second connecting rod is hinged to a clamping mold seat. The clamping mold seat is slidably connected to the base, and a clamping mold is detachably provided on the inner side of the clamping mold seat.

[0016] Preferably, a bracket is fixedly connected to the rear end of the frame, and a support frame is provided on the bracket in an adjustable manner.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the copper tube punching and drawing machine of the present invention, 1. By integrating the punching and drawing mechanisms, and using a rotating mechanism to adjust the position of the copper tube, the punching and drawing processes are integrated. This eliminates the need for multiple machines or manual intervention to change workstations, significantly reducing equipment investment costs and space requirements. It also avoids the accumulation of errors caused by secondary positioning during process transitions, significantly improving processing accuracy and production efficiency. The rotating mechanism allows for simultaneous axial movement and circumferential rotation of the copper tube. For processing multiple holes circumferentially or axially on the copper tube, multiple disassembly and repositioning are unnecessary, effectively simplifying the operation process and ensuring the uniformity and accuracy of the hole arrangement.

[0018] 2. By utilizing the inclined transmission between the core rod and the punching head, the lifting and punching effect of the punching head can be achieved without the need for an additional independent drive source. This simplifies the equipment structure, reduces the number of easily damaged components such as seals and sensors, and lowers the probability of failure and subsequent maintenance costs. Combined with a detachable clamping block and mold design, the equipment can flexibly adapt to the processing needs of copper pipes with different diameters and wall thicknesses without requiring a complete change of tooling, significantly improving the equipment's versatility and adaptability.

[0019] 3. The overall structure of the machine is compact and reasonable. The guide sleeve and core rod extend through the rotating mechanism to the clamping mechanism, ensuring coaxiality and motion stability during processing and avoiding interference problems when various mechanisms work together. The adjustable support bracket at the rear end can flexibly adjust the support height according to the length of the copper tube, effectively supporting long copper tubes and avoiding positioning offset caused by workpiece falling during processing, further ensuring processing quality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the punching mechanism in this invention; Figure 4 for Figure 3 A magnified view of a portion of point A in the middle; Figure 5 for Figure 3 Schematic diagram of the central core rod, limiting tube and mounting base; Figure 6 This is a schematic diagram of the bottom structure of the punching mechanism in this invention; Figure 7 This is a cross-sectional structural diagram of the guide sleeve in this invention; Figure 8 This is a cross-sectional structural diagram of the guide sleeve and the core rod during assembly in this invention; Figure 9 This is a schematic diagram of the core rod and punch head in this invention; Figure 10This is a schematic diagram of the rotating mechanism in this invention; Figure 11 This is a schematic diagram of the rotating mechanism in this invention; Figure 12 This is a schematic diagram of the rotating cylinder and clamping block in this invention; Figure 13 This is a schematic diagram of the structure of the pushing component and the movable sleeve in this invention; Figure 14 This is a schematic diagram of the hole-pulling mechanism and mounting bracket in this invention; Figure 15 This is a schematic diagram of the hole-pulling assembly in this invention; Figure 16 This is a schematic diagram of the clamping mechanism in this invention.

[0021] In the diagram: 1-Punching mechanism, 11-Moving plate, 12-First drive assembly, 13-Core rod, 131-Guide surface, 132-Guide strip, 14-First guide rail, 15-Limiting tube, 16-Base, 17-Fixed seat, 18-Fixed block, 19-Guide sleeve, 191-Guide hole, 111-Adjusting bolt, 112-Mounting seat, 113-Punching head, 114-Second nut, 115-First nut, 2-Frame, 3-Rotating mechanism, 31-Equipment frame, 32-Drive motor, 33-Second Guide rail, 34-rotating cylinder, 35-connecting block, 36-clamping block, 37-movable sleeve, 371-limiting groove, 38-pushing cylinder, 39-pushing frame, 391-pushing wheel, 310-second drive assembly, 4-mounting frame, 5-third drive assembly, 6-pulling hole mechanism, 7-clamping mechanism, 71-base, 72-slide rail, 73-positioning seat, 74-ear seat, 75-clamping cylinder, 76-second connecting rod, 77-first connecting rod, 78-mold clamping seat, 79-mold clamping, 8-bracket seat, 9-bracket holder. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] Please see Figure 1-16 The present invention provides a technical solution: a copper tube punching and drawing machine, including a frame 2, on which a punching mechanism 1, a rotating mechanism 3 for moving and flipping the copper tube, a drawing mechanism 6, and a clamping mechanism 7 for clamping the rear end of the copper tube are arranged sequentially from the front end to the rear end.

[0024] In the following content, all descriptions of front and back directions are based on the aforementioned front and back directions.

[0025] Please refer to Figure 3-9 The punching mechanism 1 includes a guide sleeve 19 and a core rod 13 that is retractably and coaxially sleeved within the guide sleeve 19. The rear ends of the guide sleeve 19 and the core rod 13 extend through the rotating mechanism 3 to the bottom of the punching mechanism 6. A guide hole 191 is provided vertically through the rear section of the guide sleeve 19. A punching head 113 is movably installed in the guide hole 191. The left and right sides of the rear end of the core rod 13 form a flat guide surface 131. A guide bar 132 with a lower front and higher rear is provided on the guide surface 131. A sliding groove adapted to the guide surface 131 and the guide bar 132 is provided in the punching head 113. The punching head 113 is movably clamped at the rear end of the core rod 13 through the sliding groove. When the core rod 13 is pulled back and forth, the punching head 113 moves up and down along the guide hole 191 through the guide bar 132 to punch the copper tube sleeved outside the guide sleeve 19.

[0026] The punch head 113 is restricted by the guide sleeve 191 and can only move up and down. However, since the two sides of the rear end of the core rod 13 are provided with inclined guide strips 132, and the punch head 113 is clamped on the core rod 13 through a groove with the same inclination angle, the height of the corresponding part of the guide strip 132 and the guide hole 191 changes during the back and forth movement of the core rod 13, thereby guiding and pushing the punch head 113, thus driving the punch head 113 to move up or down.

[0027] Please refer to Figure 7-9 In this embodiment, the guide bar 132 is configured to be lower in the front and higher in the back, and the main body of the punch head 113 is in a lower position. Therefore, when the core rod 13 moves backward, the lower part of the guide bar 132 gradually moves to the guide hole 191, and the punch head 113 gradually moves downward, that is, the length extending from the bottom end of the guide hole 191 increases, punching the copper tube wall below the punch head 113. When the core rod 13 extends forward, the higher part of the guide bar 132 gradually moves to the guide hole 191, causing the punch head 113 to gradually retract.

[0028] A mounting bracket 4 is provided at the rear end of the top of the frame 1. The hole-pulling mechanism 6 is movably mounted on the mounting bracket 4. The clamping mechanism 7 is located below the hole-pulling mechanism 6. The rear ends of the guide sleeve 19 and the core rod 13 extend into the clamping mechanism 7.

[0029] The copper tube is inserted into the clamping mechanism 7 at the rear end, and moves inward around the guide sleeve 19. The inner end is inserted into the rotating mechanism 3, which clamps the front end of the copper tube, allowing the copper tube to move back and forth or rotate. During processing, the clamping mechanism 7 at the rear end clamps the rear end of the copper tube for positioning. When it is necessary to adjust the position and direction of the copper tube, the clamping mechanism 7 releases the clamp, and the rotating mechanism 3 drives the copper tube to move.

[0030] A bracket seat 8 is fixedly connected to the rear end of the frame 2. A support frame 9 is installed on the bracket seat 8 in an adjustable manner to support the rear end of the copper tube and prevent the rear end from falling due to the copper tube being too long.

[0031] After the copper tube is inserted into the designated position, the front end is clamped by the rotating mechanism 3. If position adjustment or rotation is required, the punching position is moved to a position below the punching head 113, and the rotating mechanism 3 moves and rotates it. After adjustment, the clamping mechanism 7 clamps the rear end of the copper tube for fixation, and then the punching mechanism 1 punches a hole. After punching one hole, the rotating mechanism 3 can rotate the punching position upwards, and the hole-pulling mechanism 6 pulls the hole. When multiple punching and pulling operations are required, the hole can be pulled directly after each hole is punched, or multiple holes can be punched first, and then the holes can be pulled sequentially. During this process, the front-to-back position and rotation direction of the copper tube are adjusted by the rotating mechanism 3.

[0032] Furthermore, the front part of the surface of the core rod 13 is provided with external threads, a limiting tube 15 is sleeved on the front end of the surface of the core rod 13, and the two ends of the surface of the core rod 13 located at the limiting tube 15 are respectively threaded with the first nut 115 for fixing the limiting tube 15.

[0033] The limiting tube 15 is not directly connected to the core rod 13. It can rotate or move back and forth on the surface of the core rod 13. It is locked onto the core rod 13 by two first nuts 115 from both ends to fix the limiting tube 15 to the core rod 13, or to adjust the position of the limiting tube 15 relative to the core rod 13.

[0034] The punching mechanism 1 also includes a movable plate 11. The frame 2 is provided with a first drive assembly 12 that drives the movable plate 11 to move back and forth. A mounting base 112 is fixedly installed on the movable plate 11. A first threaded hole is opened on the mounting base 112 along the front and back direction. The surface of the limiting tube 15 is provided with a matching external thread. The limiting tube 15 is installed on the mounting base 112 by threaded connection. The surface of the limiting tube 114 is provided with second nuts 114 on both sides of the mounting base 112 to lock the position of the limiting tube 114.

[0035] The limiting tube 15 is installed on the mounting base 112 by a threaded connection, and two second nuts 114 are threadedly connected to the surface to clamp the mounting base 112, thereby positioning the limiting tube 15. At the same time, the front and rear positions of the limiting tube 15 relative to the mounting base 112 can be adjusted slightly.

[0036] Since the position of the limiting tube 15 relative to the mounting base 112 can be adjusted slightly, and the front and rear position of the limiting tube 15 on the core rod 13 can also be adjusted, the two work together to adjust the front and rear position of the core rod 13 within a certain range. This provides sufficient adjustment space during installation, different processing, or when adjusting the front and rear movement range of the guide bar 132 on the core rod 13 (changing the front and rear movement range of the guide bar 132 can change the extension and retraction amplitude of the punch head 113, which can be flexibly adjusted according to the processing needs of copper tubes of different diameters).

[0037] The first drive assembly 12 drives the movable plate 11 to move back and forth, which in turn drives the limit tube 15 to move back and forth through the mounting base 112, and then drives the core rod 13 to move back and forth, thereby driving the extension and retraction of the punch head 113.

[0038] The first drive assembly 12 can be a linear slide consisting of a motor, a reducer, and a ball screw, or it can be a pneumatic or electric telescopic rod, cylinder, or other components, depending on the requirements.

[0039] The frame 2 is equipped with a first guide rail 14 for the movable plate 11 to move back and forth.

[0040] The frame 2 is equipped with two position switches, one at the front and one at the back, to control the movement of the movable plate 11.

[0041] The punching mechanism 1 also includes a fixed seat 17. A mounting groove is provided on the top of the fixed seat 17. A fixed block 18 is inserted into the mounting groove. A second threaded hole is provided on the fixed block 18 along the front-back direction. The front end of the guide sleeve 19 is provided with an external thread and is installed on the fixed block 18 by threaded connection.

[0042] The guide sleeve 19 is installed on the fixed block 18 by a threaded connection, and its front and rear positions relative to the fixed block 18 can be adjusted. In conjunction with the front and rear adjustment of the core rod 13, a larger adjustment space and form can be obtained.

[0043] The fixing block 18 is inserted into the mounting slot and integrated with the fixing base 17, making it easy to assemble and disassemble.

[0044] In this embodiment, a base 16 is fixedly installed on the frame 2, and a fixed seat 17 is slidably installed on the base 16. The fixed seat 17 is provided with an adjusting bolt 111 for adjusting the front and rear position of the base 16, so that the front and rear position of the fixed seat 17 can be adjusted.

[0045] It is understandable that, in practical use, the aforementioned adjustment structure for the core rod and guide sleeve 19 can be omitted. A mounting base 12 can be provided on the movable plate 11, and the front end of the core rod 13 can be directly fixedly mounted on the mounting base 12. The fixed base 17 can be fixedly mounted on the frame, and the front end of the guide sleeve 19 can be fixedly mounted on the fixed base 17, so that processing can be performed in a fixed position.

[0046] Please refer to Figure 10-13 The rotating mechanism 3 includes a device frame 31 that can move in the front-back direction and a second drive assembly 310 that drives the device frame 31 to move. A rotating cylinder 34 that is coaxial with the guide sleeve 19 and extends rearward is rotatably arranged on the device frame 31. The guide sleeve 19 extends rearward through the axis of the rotating cylinder 34. A clamping jaw assembly for clamping copper tubes is provided at the rear end of the rotating cylinder 34.

[0047] The device frame 31 is equipped with a drive motor 32 for driving the rotating cylinder 34 to rotate. The output shaft of the drive motor 32 and the rotating cylinder 34 are connected by a synchronous pulley and a synchronous belt.

[0048] The second drive assembly 310 can be a linear slide consisting of a motor, a reducer, and a ball screw, or it can be a pneumatic or electric telescopic rod, cylinder, or other components, depending on the requirements.

[0049] The frame 2 is provided with a second guide rail 34 for the device frame 31 to move back and forth.

[0050] The frame 2 is equipped with two position switches, one at the front and one at the back, to control the movement of the device frame 31.

[0051] The gripper assembly includes multiple connecting blocks 35 that are hinged to the rear end of the rotating cylinder 34. The multiple connecting blocks 35 are evenly spaced at the rear end of the rotating cylinder 34, and each connecting block 35 is detachably provided with a gripping block 36.

[0052] The clamping block 36 and the connecting block 35 can be installed in a detachable manner by means of snap-fit ​​or other means. Different specifications of clamping block 36 can be replaced according to the specifications of the copper pipe to ensure the stability of clamping.

[0053] The outer side of the connecting block 35 forms a slope that is lower in the front and higher in the back. A movable sleeve 37 that can move back and forth is fitted on the rotating cylinder 34. When the movable sleeve 37 moves backward, it squeezes the connecting block 35, causing the clamping block 36 to tighten inward and achieve clamping.

[0054] When clamped, the diameter of the circular profile formed by the multiple clamping blocks 36 is smaller than the inner diameter of the rotating cylinder 34 and the inner diameter of the profile formed by the multiple connecting blocks 35, so as to avoid the connecting pipe 35 contacting the copper pipe when the connecting block 35 and the clamping block 36 are retracted inward to clamp the copper pipe, thus preventing the normal inward deflection action from being affected.

[0055] In another embodiment, the connecting block 35 and the rotating cylinder 34 are hinged through a connecting shaft. With the help of components such as torsion springs and springs, the connecting block 35 has the function of resetting outward, so as to prevent the connecting block 35 and the clamping block 36 from intruding into the contour of the copper tube cross section due to factors such as gravity, which would prevent the copper tube from being inserted.

[0056] Please refer to Figure 3 The rotating mechanism 3 also includes a pushing assembly, which includes a pushing frame 39 and a pushing cylinder 38. The pushing cylinder 38 is hinged to the device frame 31. One side of the pushing frame 39 is hinged to the device frame 31, and the other side is hinged to the piston rod of the pushing cylinder 38. The pushing cylinder 38 extends to push the pushing frame 39 to deflect backward. The pusher 39 is sleeved on the outside of the movable sleeve 37. The movable sleeve 37 has an annular limiting groove 371 on its circumferential direction. The pusher 39 is provided with a pusher 391 that extends into the limiting groove 371 to push the movable sleeve 37.

[0057] The cooperation between the pusher 391 and the limiting groove 371 ensures that the cam 391 is always in a position that can push and pull the movable sleeve 37, without affecting the rotation of the movable sleeve 37. The movable sleeve 37 can rotate synchronously with the rotating cylinder 34, or it can not rotate synchronously with it, only moving back and forth.

[0058] When the cylinder 38 extends, it drives the pusher 39 to deflect backward, thereby driving the pusher 391 to move backward. This pushes the movable sleeve 37 to move backward through the limiting groove 371, acting on the inclined surface of the connecting block 35 and squeezing the connecting block 35 inward. This causes the clamping block 36 to close and clamp the copper tube.

[0059] The hole-pulling mechanism 6 is vertically mounted on the mounting frame 4. The mounting frame 4 is equipped with a third drive assembly 5 that drives the hole-pulling mechanism 6 to move up and down. The third drive assembly 5 can be a linear slide consisting of a motor, a reducer and a ball screw, or it can be a pneumatic or electric telescopic rod, cylinder or other components, depending on the requirements.

[0060] The hole-pulling mechanism 6 is a mature existing technology. For details, please refer to the applicant's early patents: Chinese invention patents CN114653993B and CN111992769B. It will not be elaborated here.

[0061] The hole-pulling mechanism 6 is equipped with a cable chain to provide connection for power, hydraulic and other pipelines.

[0062] The clamping mechanism 7 includes a base 71. Two clamping assemblies are symmetrically arranged on the top two sides of the base 71. Each clamping assembly includes a positioning seat 73. An ear seat 74 is fixedly installed on the positioning seat 73. A clamping cylinder 75 is hinged to the ear seat 74. A first connecting rod 77 is also hinged to the positioning seat 73. The other end of the first connecting rod 77 is hinged to a second connecting rod 76 through a hinge shaft. The piston rod end of the clamping cylinder 75 is hinged to the hinge shaft. The other end of the second connecting rod 76 is hinged to a clamping mold seat 78. The clamping mold seat 78 is slidably connected to the base 71. A clamping mold 79 is detachably provided on the inner side of the clamping mold seat 78.

[0063] When the clamping cylinder 75 extends, it pushes the connection between the first connecting rod 77 and the second connecting rod 76 inward, thereby pushing the clamping mold base 78 inward, which in turn pushes the clamping mold 79 inward to move. The clamping components on both sides cooperate to clamp the copper tube.

[0064] The clamping mold 79 can be disassembled and replaced according to the different specifications of the copper tube. The top and bottom of the clamping mold 79 are respectively provided with through slots, and the through slots on both sides of the clamping mold 79 cooperate to form through holes, which serve as clearance holes and operation holes during punching and drawing.

[0065] The base 71 is provided with a slide rail 72 for the mold holder 78 and the mold 79 to slide.

[0066] The base 71 can be equipped with two rows of clamping components, totaling four, to accommodate different processing needs.

[0067] The rack is also equipped with a touch screen for controlling and adjusting the actions of various mechanisms in the equipment, and programs can be entered to achieve automation.

[0068] The working principle and usage process of this invention: After the invention is installed, the copper tube to be processed is first placed stably in the clamping mold 79 of the clamping mechanism 7. The clamping mold 79 precisely clamps and fixes the copper tube to ensure that the copper tube does not shift or shake during processing. The equipment is started and the preset processing parameters are input through the touch screen 8. The clamping mechanism 7 then drives the copper tube to move axially to the processing position corresponding to the punching mechanism 1. The first drive component 12 of the punching mechanism 1 drives the core rod 13 to move back and forth. The core rod 13 is driven by the rear guide surface and the sliding groove inclined surface of the punching head 16, which drives the punching head 16 to move up and down along the guide hole of the guide sleeve 19, quickly completing the punching operation at the specified position of the copper tube. After punching is completed, the second drive component 31 of the rotating mechanism 3 drives the gear transmission structure to drive the rotating cylinder 34. The rotating mechanism 3 rotates the copper tube according to a preset program, moving it precisely axially or circumferentially to adjust it to the position of the next hole to be processed. The punching process is then repeated to complete the punching of all the holes required in the circumferential or axial direction of the copper tube. After all the punching processes are completed, the rotating mechanism 3 continues to move the copper tube to the corresponding position of the hole-pulling mechanism 6. The third drive component 61 of the hole-pulling mechanism 6 drives the hole-pulling head 62 to feed towards the copper tube, and performs hole-pulling forming on the punched holes. After all the processing processes are completed, the clamping mold 79 of the clamping mechanism 7 is released, the clamping mechanism 7 is reset, and the processed copper tube can be removed.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A copper tube punching and drawing machine, characterized in that: The frame (2) includes a punching mechanism (1), a rotating mechanism (3) for moving and flipping the copper tube, a hole-pulling mechanism (6), and a clamping mechanism (7) for clamping the rear end of the copper tube, arranged sequentially from the front end to the rear end of the frame (2). The punching mechanism (1) includes a guide sleeve (19) and a core rod (13) that is retractably and coaxially sleeved within the guide sleeve (19). The rear ends of the guide sleeve (19) and the core rod (13) extend through the rotating mechanism (3) to the bottom of the punching mechanism (6). A guide hole (191) is provided vertically through the rear section of the guide sleeve (19). A punching head (113) is provided vertically and movably within the guide hole (191). The left and right sides of the rear end of the core rod (13) form flat guide surfaces (131). The guide surface (131) is provided with a guide strip (132) that is lower in the front and higher in the back. The punch head (113) is provided with a sliding groove that is adapted to the guide surface (131) and the guide strip (132). The punch head (113) is movably clamped at the rear end of the core rod (13) through the sliding groove. When the core rod (13) is pulled back and forth, the punch head (113) is driven by the guide strip (132) to move up and down along the guide hole (191) to punch the copper tube sleeved outside the guide sleeve (19). The top rear end of the frame (1) is provided with a mounting bracket (4), the hole-pulling mechanism (6) is movably mounted on the mounting bracket (4), the clamping mechanism (7) is located below the hole-pulling mechanism (6), and the rear ends of the guide sleeve (19) and the core rod (13) extend into the clamping mechanism (7).

2. The copper tube punching and drawing machine as described in claim 1, characterized in that: The front part of the core rod (13) is provided with an external thread, and a limiting tube (15) is sleeved on the front end of the core rod (13). The two ends of the core rod (13) located at the limiting tube (15) are respectively threaded with a first nut (115) to fix the limiting tube (15).

3. The copper tube punching and drawing machine as described in claim 2, characterized in that: The punching mechanism (1) also includes a movable plate (11). The frame (2) is provided with a first drive assembly (12) that drives the movable plate (11) to move back and forth. A mounting base (112) is fixedly installed on the movable plate (11). A first threaded hole is opened on the mounting base (112) along the front and back direction. The surface of the limiting tube (15) is provided with a matching external thread. The limiting tube (15) is installed on the mounting base (112) by threaded connection. The surface of the limiting tube (114) is provided with a second nut (114) on both sides of the mounting base (112) to lock the position of the limiting tube (114).

4. The copper tube punching and drawing machine as described in claim 1, characterized in that: The punching mechanism (1) also includes a fixed seat (17), the top of the fixed seat (17) has an installation groove, a fixed block (18) is inserted into the installation groove, the fixed block (18) has a second threaded hole along the front-back direction, and the front end of the guide sleeve (19) is provided with an external thread and is installed on the fixed block (18) by threaded connection.

5. The copper tube punching and drawing machine as described in claim 1, characterized in that: The rotating mechanism (3) includes a device frame (31) that can move in the front-back direction and a second drive assembly (310) that drives the device frame (31) to move. A rotating cylinder (34) that is coaxial with the guide sleeve (19) and extends rearward is rotatably provided on the device frame (31). A clamping claw assembly for clamping copper tubes is provided at the rear end of the rotating cylinder (34).

6. The copper tube punching and drawing machine as described in claim 5, characterized in that: The gripper assembly includes a plurality of connecting blocks (35) hinged to the rear end of the rotating cylinder (34). The plurality of connecting blocks (35) are evenly spaced at the rear end of the rotating cylinder (34), and each connecting block (35) is detachably provided with a gripper (36).

7. The copper tube punching and drawing machine as described in claim 6, characterized in that: The outer side of the connecting block (35) forms a slope that is lower in the front and higher in the back. A movable sleeve (37) that can move back and forth is fitted on the rotating cylinder (34). When the movable sleeve (37) moves backward, it squeezes the connecting block (35) to make the clamping block (36) tighten inward to achieve clamping.

8. The copper tube punching and drawing machine as described in claim 7, characterized in that: The rotating mechanism (3) further includes a pushing assembly, which includes a pushing frame (39) and a pushing cylinder (38). The pushing cylinder (38) is hinged to the device frame (31). One side of the pushing frame (39) is hinged to the device frame (31), and the other side is hinged to the piston rod of the pushing cylinder (38). The pushing cylinder (38) extends to push the pushing frame (39) to deflect backward. The pusher (39) is sleeved on the outside of the movable sleeve (37). The movable sleeve (37) has an annular limiting groove (371) along its circumferential direction on its surface. The pusher (39) is provided with a pusher (391) that extends into the limiting groove (371) to push the movable sleeve (37).

9. The copper tube punching and drawing machine as described in claim 1, characterized in that: The clamping mechanism (7) includes a base (71). Two clamping assemblies are symmetrically arranged on the top two sides of the base (71). Each clamping assembly includes a positioning seat (73). An ear seat (74) is fixedly installed on the positioning seat (73). A clamping cylinder (75) is hinged on the ear seat (74). A first connecting rod (77) is also hinged on the positioning seat (73). The other end of the first connecting rod (77) is hinged to a second connecting rod (76) through a hinge shaft. The piston rod end of the clamping cylinder (75) is hinged to the hinge shaft. The other end of the second connecting rod (76) is hinged to a clamping mold seat (78). The clamping mold seat (78) is slidably connected to the base (71). A clamping mold (79) is detachably provided on the inner side of the clamping mold seat (78).

10. The copper tube punching and drawing machine as described in claim 1, characterized in that: A bracket seat (8) is fixedly connected to the rear end of the frame (2), and a support frame (9) is provided on the bracket seat (8) in an adjustable manner.

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