A radiator core and tube assembly crimping apparatus

Abstract

The application belongs to the technical field of pressing machines, in particular to a radiator core and pipeline assembly pressing equipment, which comprises a pressing machine, the pressing machine is provided with two oppositely arranged pressing heads and is independently driven by two pressing driving members fixed on the machine body of the pressing machine to perform pressing operation; the pressing driving member is fixedly connected with a pressing head mounting plate, an oil groove is formed on the side of the pressing head mounting plate facing the corresponding pressing head, a limiting ring is fixedly connected at the groove opening of the oil groove, a connecting column is slidably sleeved in the limiting ring, and the pressing head on the corresponding side is arranged at one end of the connecting column; in the application, the first spring absorbs the impact in the initial stage to avoid tooth fracture, rigid support is realized by the slide plate limiting in the later stage to ensure the pressing force accuracy and the forming stability, the precise recovery of the first spring compression amount is realized by the synchronous transmission of the screw pair and the bevel gear to avoid partial load and jam and prolong the service life of the first spring.

Description

Technical Field

[0001] This invention belongs to the field of crimping machine technology, specifically a crimping device for radiator cores and pipe assemblies. Background Technology

[0002] In the production and assembly process of automotive radiators, the radiator core and the radiator water chamber need to be fixedly connected. Crimping is a key process to achieve a reliable connection between the two.

[0003] Existing technologies disclose several invention patents in the field of crimping machines. Among them, patent CN121946193A discloses an automotive radiator crimping machine, belonging to the field of automotive radiator manufacturing equipment. It includes a bracket, a core support mechanism, a water chamber pressing mechanism, and four-position crimping mechanisms (left, right, front, and rear). The core support mechanism forms a clamping channel with opposing first and second clamping plates. The water chamber pressing mechanism is positioned directly above the clamping channel to press the radiator water chamber onto the radiator core. The right and left side crimping mechanisms are slidably mounted on their respective clamping plates. The front crimping mechanism is located in front of the core support mechanism, and the rear crimping mechanism is located in front of the core support mechanism. The crimping mechanism adjusts the position of the crimping head by means of a power component and a cylinder. It provides comprehensive crimping orientation, strong connection sealing and structural stability, high equipment versatility, and adaptability to radiator cores of different lengths and widths. It also simplifies the power system, has a compact and reasonable overall structure, high degree of automation, and high crimping assembly efficiency. However, existing radiator core and pipe assembly crimping equipment still has shortcomings in actual use. The force applied by the crimping head to the pre-bent teeth must meet the crimping forming requirements, and its output strength is high. Therefore, at the moment of contact between the crimping head and the pre-bent teeth, the pre-bent teeth are prone to breakage due to excessive impact force.

[0004] Based on this, the present invention designs a crimping device for a radiator core and a piping assembly to solve the above problems. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes a crimping device for radiator cores and piping assemblies. This invention primarily addresses the deficiencies of existing crimping devices for radiator cores and piping assemblies in practical use. The force applied by the crimping head to the pre-bent teeth must meet the crimping requirements, and its output strength is high. Therefore, at the moment of contact between the crimping head and the pre-bent teeth, the pre-bent teeth are prone to breakage due to excessive impact force.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a crimping device for a radiator core and a pipe assembly, comprising a crimping machine, wherein the crimping machine is provided with two crimping heads arranged opposite to each other, and is independently driven by two crimping drive components fixed to the body of the crimping machine to perform crimping operations; a crimping head mounting plate is fixedly connected to the crimping drive component, and an oil groove is opened on the side of the crimping head facing the corresponding crimping head. A limit ring is fixedly engaged at the opening of the oil groove, and a connecting post is slidably sleeved inside the limit ring. The crimping head on the corresponding side is disposed at one end of the connecting post, and a spring seat is fixedly connected to the other end of the connecting post. The spring seat is slidably disposed in the oil groove, and a first spring is sleeved on the connecting post. The spring seat and the limit ring are elastically supported by the first spring.

[0007] The oil tank is also fitted with a base plate, and a plurality of sliding sleeves are snapped onto the side of the base plate facing the spring seat. Each sliding sleeve has a sliding rod slidably fitted inside it, and the end of each sliding rod is fixedly connected to the side of the spring seat facing the base plate.

[0008] Preferably, the bottom plate is rotatably connected to a plurality of threaded cylinders on the side facing the spring seat, each threaded cylinder is threaded with a threaded rod, the end of each threaded rod is fixedly connected to the side of the spring seat facing the bottom plate, each threaded cylinder is fixedly sleeved with a first bevel gear, and the tooth surface of each first bevel gear is respectively meshed with a second bevel gear.

[0009] The pressure head mounting plate has inner grooves on both sides, and the inner wall of each inner groove has an outer groove. The inner groove and the outer groove on the same side are slidably connected to a sliding plate. A pressure adjusting shaft is rotatably connected between the two sliding plates. Multiple adapter seats are rotatably connected to the pressure adjusting shaft. Each adapter seat is fixedly connected to the base plate. Multiple second bevel gears are fixedly sleeved on the pressure adjusting shaft. Torsion grooves are opened at both ends of the pressure adjusting shaft.

[0010] Each inner groove has a first sealing ring fixedly snapped into its inner wall, and the opposite surfaces of the two slide plates are slidably connected to the opposite sides of the two first sealing rings.

[0011] Preferably, electric cylinders are fixedly installed on both sides of the pressure head mounting plate, and each electric cylinder is fixedly connected to a linkage shaft at its telescopic end. A rear support seat is fixedly connected to the end of the linkage shaft away from the electric cylinder, and the two rear support seats are respectively arranged at the two ends of the pressure regulating shaft.

[0012] Preferably, the rear support seat has multiple sliding grooves on the side facing the end of the pressure adjusting shaft. Two sliders are slidably connected in each sliding groove. The two sliders in the same sliding groove are fixedly connected to each other on the side away from each other. Each slider is elastically supported by the inner wall of the sliding groove through the corresponding second spring. The multiple sliders located on the lower side of each sliding groove and the multiple sliders located on the upper side of each sliding groove are fixedly connected to wedge plates.

[0013] Preferably, both ends of the pressure regulating shaft are rotatably sleeved with adapter sleeves, and each adapter sleeve has multiple lubrication grooves on its inner sidewall. Each lubrication groove contains a graphite column, and a rubber pad is fixedly connected to the end of the graphite column away from the pressure regulating shaft. The graphite column forms elastic support with the inner sidewall of the lubrication groove through the rubber pad.

[0014] Preferably, an annular groove is provided on the bottom plate, and a second sealing ring is nested in the corresponding annular groove on the bottom plate. The bottom plate is slidably connected to the inner wall of the oil tank through the second sealing ring.

[0015] The top of the pressure head mounting plate is connected to a second oil pipe, the end of which is located on the side of the base plate away from the spring seat. The crimping machine is equipped with a hydraulic pump, and the other end of the second oil pipe is connected to the output port of the hydraulic pump. A second solenoid valve is installed on the second oil pipe.

[0016] Preferably, two second adapter plates are fixedly connected to the side of the connecting post facing the snap-fit ​​head. The inner sides of the two second adapter plates are rotatably connected to an adapter shaft. Multiple first adapter plates are fixedly sleeved on the adapter shaft. Each first adapter plate is fixedly connected to the snap-fit ​​head. Two third springs are also sleeved on the adapter shaft. The two second adapter plates are elastically connected to the opposite surfaces of the adjacent first adapter plates through the corresponding third springs.

[0017] Preferably, a second adapter is fixedly connected to the top of the connecting column, a second adapter is rotatably connected to the inner side of the top of the second adapter, a piston sleeve is fixedly connected to the other end of the second adapter, a piston rod is slidably sleeved on the inner side of the other end of the piston sleeve, a first adapter is fixedly connected to the other end of the piston rod, a first adapter is rotatably connected to the other end of the first adapter, and the bottom end of the first adapter is fixedly connected to the top of the pressing head.

[0018] The piston sleeve is connected to a first oil pipe, the other end of which is connected to a second oil pipe. The end of the second oil pipe is located between the second solenoid valve and the hydraulic pump. The first solenoid valve is installed on the first oil pipe.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. In this invention, the first spring absorbs the impact in the initial stage to avoid tooth breakage, and the sliding plate limits the rigid support in the later stage to ensure the accuracy of the clamping pressure and the stability of the forming. The threaded pair and the bevel gear drive synchronously to achieve accurate recovery of the compression of the first spring, avoid uneven load and jamming, and extend the service life of the first spring.

[0021] 2. In this invention, the electric cylinder drives the rear support seat position, and the buffer stroke is flexibly set according to the tooth strength to balance protection and efficiency, adapt to various working conditions. The wedge plate and the second spring form an elastic damping structure to avoid rigid impact between the pressure adjusting shaft and the rear support seat. Multi-point guidance ensures smooth movement and has automatic reset capability.

[0022] 3. In this invention, the graphite column and rubber pad inside the adapter sleeve form a stable lubrication interface, reducing friction and improving transmission flexibility and accuracy. The initial support stiffness of the spring seat is adjusted by hydraulic strength, providing an adjustable basis for the buffer characteristics and enhancing process flexibility.

[0023] 4. In this invention, the third spring enables flexible angle adjustment to compensate for deviations, hydraulic locking to maintain stable posture, smooth and automatic reset process, and full-process linkage control to improve efficiency and quality consistency. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the buckling drive component in this invention;

[0027] Figure 3 This is the present invention. Figure 2 Enlarged structural diagram at point A;

[0028] Figure 4 This is an enlarged structural schematic diagram of the pressure head mounting plate of the present invention;

[0029] Figure 5 In this invention Figure 4 A structural diagram from another perspective;

[0030] Figure 6 In this invention Figure 4 A schematic diagram of the disassembled structure;

[0031] Figure 7 In this invention Figure 4 A structural schematic diagram of the corresponding adapter sleeve in cross-section;

[0032] Figure 8 This is the present invention. Figure 7 Enlarged structural diagram at point B;

[0033] Figure 9 In this invention Figure 4 A structural schematic diagram of the corresponding slide groove section;

[0034] Figure 10 This is the present invention. Figure 9 A schematic diagram of the structure of the middle and rear support base.

[0035] In the diagram: 1. Crimping machine; 2. Crimping drive component; 3. Crimping head mounting plate; 4. Limiting ring; 5. Connecting column; 6. Crimping head; 7. Spring seat; 8. First spring; 9. Base plate; 10. Sliding sleeve; 11. Sliding rod; 12. Threaded cylinder; 13. Threaded rod; 14. First bevel gear; 15. Second bevel gear; 16. Adapter seat; 17. Torsion groove; 18. Inner groove; 19. Outer groove; 20. Slide plate; 21. Rear support seat; 22. Electric cylinder; 23. Linkage shaft; 24. Adapter sleeve; 25. Lubrication groove; 26. Rubber pad; 27. Stone 28. Ink column; 29. ​​Slide groove; 30. Slider; 31. Wedge plate; 32. Second spring; 33. First adapter plate; 34. Second sealing ring; 35. Adapter shaft; 36. Second adapter plate; 37. Third spring; 38. Oil groove; 39. First adapter frame; 40. First adapter joint; 41. Piston sleeve; 42. Piston rod; 43. Second adapter joint; 44. First oil pipe; 45. First solenoid valve; 46. Second oil pipe; 47. Second solenoid valve; 48. Hydraulic pump; 49. First sealing ring; 50. Pressure adjusting shaft. Detailed Implementation

[0036] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0037] like Figures 1 to 10 As shown, a crimping device for a radiator core and piping assembly includes a crimping machine 1. The crimping machine 1 has two crimping heads 6 arranged opposite to each other and is independently driven by two crimping drive components 2 fixed to the body of the crimping machine 1 to perform crimping operations. A crimping head mounting plate 3 is fixedly connected to the crimping drive component 2. An oil groove 37 is opened on the side of the crimping head 6 facing the crimping head 6. A limit ring 4 is fixedly engaged at the groove opening of the oil groove 37. A connecting post 5 is slidably sleeved inside the limit ring 4. The crimping head 6 on the corresponding side is set at one end of the connecting post 5. A spring seat 7 is fixedly connected to the other end of the connecting post 5. The spring seat 7 is slidably set in the oil groove 37. A first spring 8 is sleeved on the connecting post 5. The spring seat 7 and the limit ring 4 form an elastic support through the first spring 8.

[0038] The oil tank 37 is also fitted with a base plate 9. Multiple sliding sleeves 10 are snapped onto the side of the base plate 9 facing the spring seat 7. Each sliding sleeve 10 is slidably fitted with a sliding rod 11. The end of each sliding rod 11 is fixedly connected to the side of the spring seat 7 facing the base plate 9.

[0039] Multiple threaded cylinders 12 are rotatably connected to the side of the base plate 9 facing the spring seat 7. Each threaded cylinder 12 is threaded with a threaded rod 13. The end of each threaded rod 13 is fixedly connected to the side of the spring seat 7 facing the base plate 9. Each threaded cylinder 12 is fixedly sleeved with a first bevel gear 14. The tooth surfaces of each first bevel gear 14 are respectively meshed with second bevel gears 15.

[0040] The pressure head mounting plate 3 has inner grooves 18 on both sides, and outer grooves 19 are also provided on the inner wall of each inner groove 18. The inner grooves 18 and outer grooves 19 on the same side are slidably connected to a slide plate 20. A pressure adjusting shaft 50 is rotatably connected between the two slide plates 20. Multiple adapter seats 16 are rotatably connected to the pressure adjusting shaft 50. Each adapter seat 16 is fixedly connected to the base plate 9. Multiple second bevel gears 15 are fixedly sleeved on the pressure adjusting shaft 50. Torsion grooves 17 are provided at both ends of the pressure adjusting shaft 50.

[0041] Each inner wall of the inner groove 18 is fixedly snapped with a first sealing ring 49, and the opposite surfaces of the two slide plates 20 are slidably connected to the opposite sides of the two first sealing rings 49.

[0042] The implementation of this device is as follows: Two clamping drive units 2 are controlled to independently drive the corresponding clamping heads 6 to perform clamping operations. When the clamping head 6 contacts the pre-bent teeth, it pushes the spring seat 7 to slide within the oil groove 37 via the connecting column 5. Simultaneously, the spring seat 7 pulls the first spring 8 to generate elastic deformation, forming a flexible buffer in the initial stage of clamping to prevent tooth breakage due to excessive impact force during the rigid contact between the clamping head 6 and the pre-bent teeth. During the sliding process of the spring seat 7, the thrust is transmitted to the corresponding threaded cylinders 12 via multiple threaded rods 13, thereby pushing the base plate 9 to slide in the same direction within the oil groove 37. When the base plate 9 moves, it drives the two sliding plates 20 to slide along the corresponding inner grooves 18 until the sliding plates 20... The 0 abuts against the end face of the inner groove 18 and stops. At this time, the elastic support effect of the pressing head 6 is released and switched to rigid support, so as to provide accurate and stable pressing force in the later stage of pressing, ensuring the bending forming quality. At the moment when the pressing head 6 contacts the pre-bending tooth, the impact energy is absorbed by the elastic deformation of the first spring 8 to form a flexible buffer, which effectively avoids the pre-bending tooth from breaking or being damaged due to excessive initial force, and improves the product qualification rate. Through the limiting cooperation between the sliding plate 20 and the end face of the inner groove 18, the automatic switching from "elastic support" to "rigid support" is realized in the pressing process, which can not only meet the initial buffering needs, but also ensure the force accuracy and forming stability of the later pressing.

[0043] When the first spring 8 undergoes slight and irreversible permanent deformation after long-term operation, a wrench is inserted into the torsion groove 17 at the end of the pressure adjusting shaft 50 and the pressure adjusting shaft 50 is rotated. The pressure adjusting shaft 50 drives the multiple second bevel gears 15 fixedly sleeved on it to rotate synchronously. Each second bevel gear 15 transmits torque to each threaded cylinder 12 through its corresponding meshing first bevel gear 14, driving each threaded cylinder 12 to rotate relative to the threaded surface of each threaded rod 13. Through the multiple threaded rods 13, a thrust is applied to the spring seat 7, causing the spring seat 7 to compress the first spring 8, thereby restoring the initial elastic force of the first spring 8. The threaded cylinder 12 and the threaded rod 13 are used to achieve this. The threaded transmission of the 3-type pressure adjusting shaft 50 converts the rotational motion of the pressure adjusting shaft 50 into the axial displacement of the spring seat 7, realizing stepless adjustment of the compression of the first spring 8, ensuring that the elastic force is restored to the initial set value, and ensuring consistent buffering. Through the meshing transmission of multiple second bevel gears 15 and each first bevel gear 14 on the pressure adjusting shaft 50, the synchronous rotation of multiple threaded cylinders 12 is realized, so that each force point of the spring seat 7 is pushed forward evenly, avoiding the spring seat 7 from jamming or wear due to uneven load. When the first spring 8 undergoes slight permanent deformation, it is compensated in time, avoiding insufficient buffering or uneven force on the pressure head 6 due to the decay of elastic force, thereby extending the service life of the first spring 8.

[0044] Specifically, electric cylinders 22 are fixedly installed on both sides of the pressure head mounting plate 3. Each electric cylinder 22 is fixedly connected to a linkage shaft 23 at its telescopic end. A rear support seat 21 is fixedly connected to the end of the linkage shaft 23 away from the electric cylinder 22. The two rear support seats 21 are respectively set at both ends of the pressure regulating shaft 50.

[0045] The implementation method is as follows: based on the strength grade of the pre-bent teeth to be crimped, corresponding control commands are synchronously sent to two electric cylinders 22. The two electric cylinders 22 perform extension and retraction actions according to the commands. Their extension and retraction ends drive the corresponding rear support seats 21 to move through the linkage shaft 23, thereby adjusting the distance between the two rear support seats 21 and the two ends of the pressure adjusting shaft 50. When the two ends of the pressure adjusting shaft 50 abut against the two rear support seats 21 respectively, a limit stop is formed. At this time, the two slide plates 20 will no longer be able to slide along the corresponding inner grooves 18, thereby controlling the switching from "elastic support" to "rigid support" during the crimping process. The trigger stroke can be precisely adjusted by the electric cylinder 22 to change the position of the rear support 21 according to the strength level of different pre-bent teeth. The stroke node for switching from elastic support to rigid support can be flexibly set, so that the equipment can adapt to the crimping requirements of heat sink cores of different materials or thicknesses without manual disassembly and adjustment. By preset switching stroke, the optimal buffer stroke length can be matched for pre-bent teeth of different strength levels. Teeth with lower strength can have a longer buffer stroke to fully absorb the impact, while teeth with higher strength can have a shorter buffer stroke to enter the rigid crimping stage as soon as possible, thereby improving crimping efficiency while protecting the integrity of the teeth.

[0046] Specifically, the rear support 21 has multiple grooves 28 on the side facing the end of the pressure adjusting shaft 50. Each groove 28 has two sliders 29 slidably connected to it. The two sliders 29 in the same groove 28 are fixedly connected to the side away from each other by a second spring 31. Each slider 29 is elastically supported by the inner wall of the groove 28 through the corresponding second spring 31. The multiple sliders 29 located on the lower side of each groove 28 and the multiple sliders 29 located on the upper side of each groove 28 are fixedly connected to wedge plates 30.

[0047] In this embodiment, the end of the pressure adjusting shaft 50 contacts the inclined surfaces of two wedge plates 30 before abutting against the corresponding rear support seat 21. Under the pushing action of the pressure adjusting shaft 50, the two wedge plates 30 move away from each other. During this process, each wedge plate 30 slides along the corresponding slide groove 28 via multiple sliders 29 fixedly connected to it, and compresses the corresponding second spring 31 to cause elastic deformation, thereby providing contact buffer protection for the pressure adjusting shaft 50 and the rear support seat 21. Before the end of the pressure adjusting shaft 50 abuts against the rear support seat 21, it is decelerated and buffered by the elastic damping structure formed by the wedge plates 30 and the second spring 31 to avoid impact damage caused by rigid contact between the pressure adjusting shaft 50 and the rear support seat 21. The wedge plates 30 slide along the corresponding slide groove 28 via multiple sliders 29, forming multi-point guidance and support. The support ensures that the wedge plate 30 moves smoothly and without deviation when pushed, avoiding jamming or local wear due to uneven force. The distributed connection between each wedge plate 30 and multiple sliders 29 and second springs 31 makes the buffering force evenly distributed in multiple slides 28, avoiding fatigue failure due to excessive force on a single second spring 31, and improving the reliability of the buffering system. The sequential action design of the end of the pressure adjusting shaft 50 "first contacts the inclined surface of the wedge plate 30, and then abuts against the rear support seat 21" makes the buffering intervention and limit stop naturally connected, which not only ensures the accuracy of position adjustment, but also takes into account the safety of the contact process. When the pressure adjusting shaft 50 disengages from the wedge plate 30 in subsequent work, the second spring 31 in the compressed state can push the slider 29 and wedge plate 30 to automatically reset, preparing for the next contact buffering, without the need for an additional reset mechanism.

[0048] Specifically, both ends of the pressure regulating shaft 50 are rotatably fitted with adapter sleeves 24. Each adapter sleeve 24 has multiple lubrication grooves 25 on its inner sidewall. Each lubrication groove 25 contains a graphite column 27. The end of the graphite column 27 away from the pressure regulating shaft 50 is fixedly connected to a rubber pad 26. The graphite column 27 forms an elastic support with the inner sidewall of the lubrication groove 25 through the rubber pad 26.

[0049] The embodiment of this invention is as follows: the end of the pressure adjusting shaft 50 passes through the adapter sleeve 24, and forms a rolling contact with the inclined surfaces of the two wedge plates 30 through the adapter sleeve 24. Under the elastic support of the corresponding rubber pads 26, the multiple graphite pillars 27 in each adapter sleeve 24 are always pressed against the axial surface of the pressure adjusting shaft 50, thereby forming a continuous and stable lubrication interface between the pressure adjusting shaft 50 and the adapter sleeve 24. Through the rolling contact between the adapter sleeve 24 and the inclined surfaces of the wedge plates 30, the sliding friction between the end of the pressure adjusting shaft 50 and the wedge plates 30 is converted into rolling friction. Combined with the self-lubricating effect of the graphite pillars 27, the contact resistance is greatly reduced, making the rotation of the pressure adjusting shaft 50 more flexible and smooth. The multiple graphite pillars 27 are distributed circumferentially along the inner sidewall of the adapter sleeve 24, forming a multi-point uniform support for the pressure adjusting shaft 50 under the action of the rubber pads 26, avoiding radial movement or swaying of the pressure adjusting shaft 50 during rotation, and ensuring transmission accuracy.

[0050] Specifically, an annular groove is provided on the base plate 9, and a second sealing ring 33 is nested in the corresponding annular groove on the base plate 9. The base plate 9 is slidably connected to the inner wall of the oil groove 37 through the second sealing ring 33.

[0051] The top of the pressure head mounting plate 3 is connected to a second oil pipe 46. The end of the second oil pipe 46 is located on the side of the base plate 9 away from the spring seat 7. The crimping machine 1 is equipped with a hydraulic pump 48. The other end of the second oil pipe 46 is connected to the output port of the hydraulic pump 48. A second solenoid valve 47 is installed on the second oil pipe 46.

[0052] The implementation method is as follows: According to the strength grade of the pre-bent tooth to be crimped, the hydraulic pump 48 is started and a corresponding control command is sent to the second solenoid valve 47. The hydraulic pump 48 adjusts the hydraulic intensity in the oil groove 37 through the second oil pipe 46. According to the strength grade of the pre-bent tooth, the hydraulic intensity in the oil groove 37 can be precisely adjusted through the hydraulic system so that the initial deformation of the first spring 8 matches the tooth with different strength grades, realizing flexible adaptive adjustment of the crimping parameters. Adjusting the hydraulic intensity in the oil groove 37 substantially changes the initial support stiffness of the spring seat 7, thereby allowing the buffering characteristics of the crimping head 6 at the moment of contact with the pre-bent tooth to be preset, providing an adjustable starting condition for the subsequent switch from "flexible buffering" to "rigid support". When the crimping head 6 contacts the pre-bent tooth, the multiple first adapter plates 32 fixedly connected to it rotate around the adapter shaft 34 and twist the third spring 36 sleeved on the adapter shaft 34 to produce elastic deformation, so that the crimping head 6 can adaptively fit the deformation surface of the pre-bent tooth. Then, the first solenoid valve 45 is closed, locking the piston rod 41 within the piston sleeve 40 and preventing it from extending or retracting, thus maintaining the crimping head 6 in the current contact position to complete the crimping operation. After a single crimping action is completed, the first solenoid valve 45 is opened and the hydraulic pump 48 is started, and the crimping head 6 automatically resets under the return force of the third spring 36.

[0053] Specifically, two second adapter plates 35 are fixedly connected to the side of the connecting post 5 facing the clamping head 6. The inner sides of the two second adapter plates 35 are rotatably connected to an adapter shaft 34. Multiple first adapter plates 32 are fixedly sleeved on the adapter shaft 34. Each first adapter plate 32 is fixedly connected to the clamping head 6. Two third springs 36 are also sleeved on the adapter shaft 34. The two second adapter plates 35 are elastically connected to the opposite surfaces of the adjacent first adapter plates 32 through the corresponding third springs 36. A second adapter frame 43 is fixedly connected to the top of the connecting post 5. A second adapter joint 42 is rotatably connected to the inner side of the top of the second adapter frame 43. A piston sleeve 40 is fixedly connected to the other end of the second adapter joint 42. A piston rod 41 is slidably sleeved on the inner side of the other end of the piston sleeve 40. A first adapter joint 39 is fixedly connected to the other end of the piston rod 41. A first adapter frame 38 is rotatably connected to the other end of the first adapter joint 39. The bottom end of the first adapter frame 38 is fixedly connected to the top of the clamping head 6.

[0054] The piston sleeve 40 is connected to a first oil pipe 44, and the other end of the first oil pipe 44 is connected to a second oil pipe 46. The end of the second oil pipe 46 is located between the second solenoid valve 47 and the hydraulic pump 48. The first solenoid valve 45 is installed on the first oil pipe 44.

[0055] The implementation device is as follows: The clamping head 6 rotates around the adapter shaft 34 via multiple first adapter plates 32. In conjunction with the elastic deformation of the third spring 36, the clamping head 6 can automatically adjust the pressing angle according to the actual deformation surface of the pre-bent teeth, compensating for parallelism deviations caused by installation errors or part tolerances, ensuring uniform force on the pressing surface, and improving the clamping forming quality. After closing the first solenoid valve 45, the piston rod 41 is locked inside the piston sleeve 40 and cannot extend or retract, allowing the clamping head 6 to maintain its adaptively adjusted contact posture. This prevents the clamping head from swaying or retracting due to force fluctuations during clamping, ensuring stable application of clamping force. After a single clamping operation is completed, the piston rod 41 is released by opening the first solenoid valve 45, and the clamping head 6 automatically returns to its original position due to the reset force of the third spring 36. Returning to its initial position without manual intervention, it prepares for the next crimping operation, improving the automation level of the equipment. The crimping head 6 achieves flexible angle self-adaptation through the third spring 36 at the moment of contact, and maintains a rigid posture through hydraulic locking after contact. The two are organically combined, taking into account the compliance of the initial contact and the stability of the crimping process. The third spring 36 provides a reset force after crimping. The reset process is smooth and controllable, avoiding secondary damage to the pre-bent teeth or core plate caused by forced pulling when the crimping head 6 is removed from the workpiece. Through the linkage control of the first solenoid valve 45 and the hydraulic pump 48, the fully automatic sequential actions of fitting, locking, crimping, unlocking and resetting are realized. There is no need for manual adjustment of the crimping head angle or posture, shortening the cycle time of a single operation and improving the efficiency of mass production.

[0056] During operation, in the initial stage of the crimping process, the two crimping drive units 2 independently control the corresponding crimping heads 6 to perform the crimping action. When the crimping head 6 contacts the pre-bent teeth, it pushes the spring seat 7 to slide in the oil groove 37 through the connecting column 5. The spring seat 7 simultaneously stretches the first spring 8 to produce elastic deformation, thus forming a flexible buffer in the initial stage of crimping. This effectively prevents the teeth from breaking due to excessive impact force at the moment of rigid contact between the crimping head 6 and the pre-bent teeth. During the sliding process of the spring seat 7, multiple threaded rods 13 transmit the thrust to the corresponding threaded cylinders 12, pushing the base plate 9 to slide in the same direction in the oil groove 37. The plate 9 drives the two slide plates 20 to slide along their respective inner grooves 18 until the slide plates 20 abut against the end face of the inner groove 18 to achieve a limit stop. At this time, the elastic support effect is released and switched to rigid support to ensure that the clamping force is accurate and stable in the later stage of clamping, and to ensure the bending and forming quality. This process absorbs the impact energy through the deformation of the first spring 8, achieves initial flexible buffering, avoids tooth damage, and improves the product qualification rate. At the same time, through the limiting cooperation between the slide plate 20 and the end face of the inner groove 18, the switch from "elastic support" to "rigid support" is automatically completed, taking into account both the initial buffering requirements and the later force accuracy.

[0057] When the first spring 8 undergoes slight irreversible permanent deformation after long-term use, insert a wrench into the torsion groove 17 at the end of the adjusting shaft 50 and rotate the adjusting shaft 50. The adjusting shaft 50 drives the multiple second bevel gears 15 fixedly sleeved on it to rotate synchronously. Each second bevel gear 15 transmits torque to each threaded cylinder 12 through the corresponding first bevel gear 14 meshing with it, driving the threaded cylinder 12 to rotate relative to the threaded surface of the threaded rod 13, and applying a thrust to the spring seat 7 through the multiple threaded rods 13, causing the spring seat 7 to compress the first spring 8, thereby restoring its initial elastic force. This adjustment method uses the threaded pair transmission to convert the rotational motion into axial displacement, realizing stepless adjustment of the compression of the first spring 8, ensuring that the elastic force is accurately restored to the initial set value, ensuring buffer consistency. At the same time, the synchronous meshing of the multiple second bevel gears 15 with each first bevel gear 14 makes the force points of the spring seat 7 advance evenly, avoiding jamming or wear caused by uneven load, timely compensating for the attenuation of elastic force, and extending the service life of the first spring 8.

[0058] Based on the strength level of the pre-bent teeth, control commands are simultaneously sent to the two electric cylinders 22. The electric cylinders 22 drive the corresponding rear support seats 21 to move via the extension end and the linkage shaft 23, adjusting the distance between the rear support seats 21 and the two ends of the pressure adjusting shaft 50. When the two ends of the pressure adjusting shaft 50 abut against the two rear support seats 21 respectively, a limit stop is formed, and the slide plate 20 can no longer slide along the inner groove 18, thereby controlling the trigger stroke of switching from "elastic support" to "rigid support" during the crimping process. This design can precisely adjust the switching stroke node through the electric cylinders 22 according to the teeth with different strength levels, adapting to the crimping requirements of radiator cores of different materials or thicknesses. No manual disassembly is required. For teeth with lower strength, the buffer stroke can be extended to fully absorb the impact, and for teeth with higher strength, the buffer stroke can be shortened to enter the rigid crimping stage as soon as possible, thereby protecting the integrity of the teeth while improving the crimping efficiency.

[0059] Before the end of the pressure adjusting shaft 50 abuts against the corresponding rear support seat 21, it first contacts the inclined surfaces of two wedge plates 30. Under the pressure of the pressure adjusting shaft 50, the two wedge plates 30 move away from each other. Each wedge plate 30 slides along the corresponding slide groove 28 through multiple sliders 29 fixedly connected to it, and compresses the corresponding second spring 31 to produce elastic deformation, providing contact buffer protection for the pressure adjusting shaft 50 and the rear support seat 21. This structure allows the end of the pressure adjusting shaft 50 to be decelerated and buffered by the elastic damping structure formed by the wedge plates 30 and the second spring 31 before abutting against the rear support seat 21, avoiding rigid impact damage. The slider 29 forms multi-point guidance and support along the groove 28, ensuring that the wedge plate 30 moves smoothly and without deviation, avoiding jamming or local wear. The distributed connection makes the buffer force evenly distributed, avoiding fatigue failure of a single spring and improving the reliability of the buffer system. The sequential action of the end of the pressure adjusting shaft 50 "first contacts the inclined surface of the wedge plate 30, and then abuts against the rear support seat 21" makes the buffer intervention and limit stop naturally connected, taking into account both the accuracy of position adjustment and the safety of contact. When the pressure adjusting shaft 50 disengages from the wedge plate 30, the compressed second spring 31 pushes the slider 29 and the wedge plate 30 to automatically reset, without the need for an additional reset mechanism.

[0060] The end of the pressure adjusting shaft 50 passes through the adapter sleeve 24 and forms a rolling contact with the inclined surfaces of the two wedge plates 30 through the adapter sleeve 24. Multiple graphite pillars 27 inside the adapter sleeve 24 are always pressed against the axial surface of the pressure adjusting shaft 50 under the elastic support of the corresponding rubber pads 26, forming a continuous and stable lubrication interface between the pressure adjusting shaft 50 and the adapter sleeve 24. The rolling contact converts sliding friction into rolling friction. Combined with the self-lubricating effect of the graphite pillars 27, the contact resistance is greatly reduced, making the rotation of the pressure adjusting shaft 50 more flexible and smooth. Multiple graphite pillars 27 are distributed circumferentially, forming a multi-point uniform support for the pressure adjusting shaft 50 under the action of the rubber pads 26, avoiding radial movement or sway, and ensuring transmission accuracy.

[0061] According to the strength grade of the pre-bent teeth, the hydraulic pump 48 is started and a control command is sent to the second solenoid valve 47. The hydraulic pump 48 adjusts the hydraulic intensity in the oil groove 37 through the second oil pipe 46, so that the initial deformation of the first spring 8 matches the teeth of different strength grades, realizing the flexible adaptive adjustment of the crimping parameters. Adjusting the hydraulic intensity substantially changes the initial support stiffness of the spring seat 7, thereby presetting the buffering characteristics at the moment of contact of the crimping head 6, and providing adjustable starting conditions for the subsequent switch from "flexible buffering" to "rigid support".

[0062] When the clamping head 6 contacts the pre-bent teeth, the multiple first adapter plates 32 fixedly connected to it rotate around the adapter shaft 34, and twist the third spring 36 sleeved on the adapter shaft 34 to produce elastic deformation, so that the clamping head 6 adaptively conforms to the deformed surface of the pre-bent teeth. Then, the first solenoid valve 45 is closed, so that the piston rod 41 is locked in the piston sleeve 40 and cannot extend or retract, maintaining the clamping head 6 in the current conforming posture to complete the clamping operation. After a single clamping is completed, the first solenoid valve 45 is opened and the hydraulic pump 48 is started. The clamping head 6 automatically resets under the return force of the third spring 36. This process achieves flexible angle adaptation through the elastic deformation of the third spring 36, compensating for parallelism deviations caused by installation errors or part tolerances, ensuring uniform force on the pressing surface, and closing the first solenoid valve 45. After the first solenoid valve 45 is activated, the hydraulic locking keeps the crimping head 6 in a stable position after adaptive adjustment, avoiding swaying or backing caused by force fluctuations during crimping, and ensuring stable application of crimping force. After crimping is completed, the locking is released and the spring resets the head, achieving automatic return to the initial position without manual intervention, thus improving the automation level of the equipment. The flexible adaptive action at the moment of contact and the rigid posture after contact are organically combined, taking into account both compliance and stability. The third spring 36 provides a smooth and controllable reset force, avoiding secondary damage to the teeth or the main core plate caused by forced disengagement. Through the linkage control of the first solenoid valve 45 and the hydraulic pump 48, the fully automatic sequential actions of fitting, locking, crimping, unlocking, and resetting are realized, shortening the cycle time of a single operation and improving the efficiency of mass production.

[0063] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A crimping device for a radiator core and piping assembly, comprising a crimping machine, wherein the crimping machine has two opposing crimping heads, which are independently driven by two crimping drive components fixed to the body of the crimping machine to perform the crimping operation; characterized in that: A pressure head mounting plate is fixedly connected to the clamping drive component. An oil groove is opened on the side of the pressure head facing the corresponding clamping head. A limit ring is fixedly engaged at the opening of the oil groove. A connecting post is slidably sleeved inside the limit ring. The clamping head on the corresponding side is disposed at one end of the connecting post. A spring seat is fixedly connected to the other end of the connecting post. The spring seat is slidably disposed in the oil groove. A first spring is sleeved on the connecting post. The spring seat and the limit ring are elastically supported by the first spring. The oil tank is also fitted with a base plate, and a plurality of sliding sleeves are snapped onto the side of the base plate facing the spring seat. Each sliding sleeve has a sliding rod slidably fitted inside it, and the end of each sliding rod is fixedly connected to the side of the spring seat facing the base plate.

2. The crimping device for a radiator core and piping assembly according to claim 1, characterized in that: The base plate is rotatably connected to a plurality of threaded cylinders on the side facing the spring seat. Each threaded cylinder is threaded with a threaded rod. The end of each threaded rod is fixedly connected to the side of the spring seat facing the base plate. Each threaded cylinder is fixedly sleeved with a first bevel gear, and the tooth surface of each first bevel gear is respectively meshed with a second bevel gear. The pressure head mounting plate has inner grooves on both sides, and the inner wall of each inner groove has an outer groove. The inner groove and the outer groove on the same side are slidably connected to a sliding plate. A pressure adjusting shaft is rotatably connected between the two sliding plates. Multiple adapter seats are rotatably connected to the pressure adjusting shaft. Each adapter seat is fixedly connected to the base plate. Multiple second bevel gears are fixedly sleeved on the pressure adjusting shaft. Torsion grooves are opened at both ends of the pressure adjusting shaft. Each inner groove has a first sealing ring fixedly snapped into its inner wall, and the opposite surfaces of the two slide plates are slidably connected to the opposite sides of the two first sealing rings.

3. The crimping device for a radiator core and piping assembly according to claim 2, characterized in that: Electric cylinders are fixedly installed on both sides of the pressure head mounting plate. Each electric cylinder is fixedly connected to a linkage shaft at its telescopic end. A rear support seat is fixedly connected to the end of the linkage shaft away from the electric cylinder. The two rear support seats are respectively arranged at both ends of the pressure adjusting shaft.

4. The crimping device for a radiator core and piping assembly according to claim 3, characterized in that: The rear support seat has multiple sliding grooves on the side facing the end of the pressure adjusting shaft. Two sliders are slidably connected in each sliding groove. The two sliders in the same sliding groove are fixedly connected to each other on the side away from each other. Each slider is elastically supported by the inner wall of the sliding groove through the corresponding second spring. The multiple sliders located on the lower side of each sliding groove and the multiple sliders located on the upper side of each sliding groove are fixedly connected to wedge plates.

5. A crimping device for a radiator core and piping assembly according to claim 4, characterized in that: Both ends of the pressure regulating shaft are rotatably fitted with adapter sleeves. Each adapter sleeve has multiple lubrication grooves on its inner sidewall. Each lubrication groove contains a graphite column. The end of the graphite column away from the pressure regulating shaft is fixedly connected to a rubber pad. The graphite column is elastically supported by the inner sidewall of the lubrication groove through the rubber pad.

6. The crimping device for a radiator core and piping assembly according to claim 5, characterized in that: An annular groove is provided on the base plate, and a second sealing ring is nested in the corresponding annular groove on the base plate. The base plate is slidably connected to the inner wall of the oil tank through the second sealing ring. The top of the pressure head mounting plate is connected to a second oil pipe, the end of which is located on the side of the base plate away from the spring seat. The crimping machine is equipped with a hydraulic pump, and the other end of the second oil pipe is connected to the output port of the hydraulic pump. A second solenoid valve is installed on the second oil pipe.

7. A crimping device for a radiator core and piping assembly according to claim 6, characterized in that: Two second adapter plates are fixedly connected to the side of the connecting post facing the snap-fit ​​head. The inner sides of the two second adapter plates are rotatably connected to an adapter shaft. Multiple first adapter plates are fixedly sleeved on the adapter shaft. Each first adapter plate is fixedly connected to the snap-fit ​​head. Two third springs are also sleeved on the adapter shaft. The two second adapter plates are elastically connected to the opposite surfaces of the adjacent first adapter plates through the corresponding third springs.

8. The crimping device for a radiator core and piping assembly according to claim 7, characterized in that: A second adapter is fixedly connected to the top of the connecting column. A second adapter is rotatably connected to the inner side of the top of the second adapter. A piston sleeve is fixedly connected to the other end of the second adapter. A piston rod is slidably sleeved on the inner side of the other end of the piston sleeve. A first adapter is fixedly connected to the other end of the piston rod. A first adapter is rotatably connected to the other end of the first adapter. The bottom end of the first adapter is fixedly connected to the top of the pressing head. The piston sleeve is connected to a first oil pipe, the other end of which is connected to a second oil pipe. The end of the second oil pipe is located between the second solenoid valve and the hydraulic pump. The first solenoid valve is installed on the first oil pipe.

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