Heat exchanger part forming die based on guide supporting column structure

Abstract

The invention relates to the technical field of heat exchange sheet processing, and discloses a heat exchanger part forming die based on a guide pillar structure, which comprises a static die connected to the upper end of a workbench of a punching machine, and a movable die connected to the lower end of a slide block of the punching machine and moving up and down along with the slide block; wherein the static die comprises a lower mounting base, the upper end face of the lower mounting base is slidably connected with a supporting plate through a mounting groove, and a male die slidably connected with the supporting plate is fixedly connected into the mounting groove. The heat exchanger part forming die based on the guide supporting column structure can effectively solve the problems that in the prior art, stamping and cutting of heat exchange pieces are carried out step by step, the heat exchange pieces need to be transferred twice, auxiliary working hours are increased, equipment efficiency is reduced, production investment and cost are improved, and production cost is reduced. And during secondary positioning, positioning accumulative errors are easily generated due to elastic rebounding of the heat exchange pieces and non-coincidence of clamping references, so that the quality problems of size out-of-tolerance and the like of the heat exchange pieces occur, meanwhile, mold loss is accelerated, and the maintenance cost is increased are solved.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger fin processing technology, and more specifically to a forming mold for heat exchanger parts based on a guide pillar structure. Background Technology

[0002] Heat exchange fins are the core components of plate heat exchangers. They are usually thin metal plates with special structures such as corrugations and sealing grooves on the surface. Their function is to increase the heat exchange area and enhance fluid turbulence, thereby improving the heat exchange efficiency of the heat exchanger. At the same time, it is necessary to ensure a tight seal with adjacent heat exchange fins.

[0003] Currently, the processing of heat exchange fins mainly adopts the stamping process, which involves applying pressure to the metal sheet through a stamping die to cause plastic deformation, and then transferring the formed heat exchange fin to a cutting die for edge trimming and hole processing.

[0004] This processing method has obvious shortcomings: First, during the step-by-step processing, the heat exchanger needs to be physically transferred between the forming mold and the cutting mold. This involves the picking up, placing, temporarily storing, and re-clamping of the workpiece, which not only increases auxiliary time and reduces the effective operating rate of the equipment, but also requires the configuration of corresponding transfer equipment and workstation space, resulting in increased production input and operating costs. Second, during the secondary positioning, the heat exchanger has a certain elastic rebound after forming, and the reference of the two clamping is difficult to completely coincide, which easily leads to cumulative positioning errors. This results in quality defects such as dimensional deviations, excessive edge burrs, and surface scratches in the heat exchanger. At the same time, it also accelerates the wear of the mold cutting edge and the failure of the guide components, increasing the frequency and cost of mold maintenance. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a heat exchanger part forming mold based on a guide pillar structure. This effectively solves the problems in existing technologies where the stamping and cutting of heat exchanger plates are performed in separate steps, requiring secondary transfer of the heat exchanger plates, increasing auxiliary time, reducing equipment efficiency, and increasing production input and costs. Furthermore, during secondary positioning, the elastic rebound of the heat exchanger plates and the misalignment of clamping references can easily lead to cumulative positioning errors, resulting in quality problems such as dimensional deviations in the heat exchanger plates. At the same time, it accelerates mold wear and increases maintenance costs.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a forming die for heat exchanger parts based on a guide pillar structure, mounted on a stamping press, comprising:

[0008] A stationary die connected to the upper end of the worktable of the stamping machine, and a moving die connected to the lower end of the slide of the stamping machine and moving up and down with it.

[0009] The static mold includes a lower mounting base, and a support plate is slidably connected to the upper end face of the lower mounting base through a mounting groove. A punch that is slidably connected to the support plate is fixedly connected in the mounting groove. Columnar seats are rotatably connected in the mounting groove in a matrix arrangement. The columnar seats and the worktable are connected by a composite connection method of sliding and rotation. A limiting mechanism for adjusting the lifting range of the lower mounting base and the support plate is connected to both the columnar seats and the worktable.

[0010] The moving mold includes an upper mounting base that is slidably connected to a slider via a connecting rod. A return spring is sleeved on the connecting rod. The upper mounting base is connected to a die that is adapted to the punch. The die consists of a mold frame that is fixedly connected to the upper mounting base and a mold base that is slidably connected to the mold frame. The upper mounting base and the slider are jointly connected to an adjustment mechanism that changes the position of the mold base in the mold frame. The mold base and the upper mounting base are connected by a traction spring.

[0011] Furthermore, the limiting mechanism includes a guide post, which is slidably connected to the top of the column base and slidably connected to the support plate. The lower end of the guide post is located inside the column base and connected to a rotating component. The column base and the support plate are connected together to a locking component. The column base and the worktable are connected together to a limiting component. A positioning sleeve adapted to the guide post is fixedly connected to the upper mounting base.

[0012] Furthermore, the rotating assembly includes a rotating cylinder slidably connected in a cylindrical seat, a push block fixedly connected to the lower end of the guide column, a guide groove fixedly connected to the inner circumference of the rotating cylinder, a guide block fixedly connected to the outer circumference of the push block, the guide block slidably connected in the guide groove, and the lower end of the push block connected to the guide column via a compression spring.

[0013] Furthermore, the locking assembly includes a locking seat, two of which are sleeved on the cylindrical seat. The upper locking seat is fixedly connected to the cylindrical seat, and the lower locking seat is fixedly connected to the lower mounting seat. The two locking seats are respectively fixedly connected to a corresponding and cooperating wedge at their adjacent ends.

[0014] Furthermore, the limiting component includes a limiting block, which is fixedly sleeved on the cylindrical base and positioned below the lower mounting seat. A limiting seat is fixedly connected to the worktable, and a sliding groove that matches the contour of the limiting block is vertically opened in the limiting seat. A support spring is sleeved on the cylindrical base between the limiting block and the limiting seat.

[0015] Furthermore, the adjustment mechanism includes a push plate, which is slidably connected to the upper end face of the upper mounting base. A backing plate is fixedly connected to the upper end face of the mold base. Corresponding and mutually cooperating trapezoidal blocks are uniformly fixedly connected to the end faces of the push plate and the backing plate. An installation chamber is fixedly connected to the upper end of the upper mounting base, and a pushing component is connected in the installation chamber.

[0016] Furthermore, the pushing component includes a pressing and rotating module, the principle of which is the same as that of the rotating component, and a cam is fixedly connected to the lower end of the pressing and rotating module.

[0017] Furthermore, a positioning post is fixedly connected to the support plate, and countersunk posts are fixedly connected to the support plate in a matrix arrangement. The countersunk posts are slidably connected to the punch, and a pressing post adapted to the countersunk post is fixedly connected to the upper mounting base. The pressing post is slidably connected to the mold base.

[0018] The technical solution provided by this invention has the following advantages compared with the prior art:

[0019] 1. In this invention, when the slider moves down for the first time, the punch and die cooperate to complete the stamping and forming of the heat exchanger plate rough die; when the slider moves down for the second time, the maximum downward movement distance of the lower mounting base is adjusted by the limiting mechanism, so that the relative displacement between the mold frame and the punch increases, and the rough die edge scrap is sheared simultaneously. At the same time, the countersunk post and the pressing post cooperate to complete the round hole processing. Compared with the traditional step-by-step processing that requires transfer and secondary clamping between the forming and cutting molds, this mold completes multiple processes in one clamping, reducing auxiliary time and investment in transfer equipment, and avoiding the cumulative error caused by secondary positioning.

[0020] 2. In this invention, when the plate is placed on the punch, the positioning pin on the support plate can automatically center and position the plate. The punch is used as the reference throughout the stamping and cutting process. The moving die and the stationary die are precisely connected to the positioning sleeve through the guide pin, ensuring that the relative position of the punch, die and mold frame is stable. This design avoids the positioning deviation caused by the non-coincidence of the secondary clamping reference in traditional step-by-step processing, and significantly improves the edge size of the heat exchanger, the hole accuracy and the sealing fit with adjacent heat exchanger. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the static mold structure according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure after static mold separation according to an embodiment of the present invention;

[0025] Figure 4This is a schematic diagram of the cross-sectional structure of the static mold according to an embodiment of the present invention;

[0026] Figure 5 This is an embodiment of the present invention. Figure 4 A magnified structural diagram of part A in the middle;

[0027] Figure 6 This is a schematic diagram of the structure of the rotating component according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the moving mold in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure after the moving mold is separated according to an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the cross-sectional structure of the moving mold in an embodiment of the present invention.

[0031] The labels in the diagram represent: 1. Workbench; 2. Stationary mold; 21. Lower mounting base; 211. Mounting slot; 22. Support plate; 23. Punch; 24. Column base; 25. Limiting mechanism; 251. Guide post; 252. Rotating assembly; 2521. Rotary cylinder; 2522. Push block; 2523. Guide groove; 2524. Guide block; 2525. Compression spring; 253. Locking assembly; 2531. Locking seat; 2532. Wedge block; 254. Limiting assembly; 2541. Limiting block; 2542. Limiting... 2543, Slide; 2544, Support Spring; 255, Positioning Sleeve; 26, Positioning Post; 27, Countersunk Post; 28, Pressing Post; 3, Slider; 4, Moving Mold; 41, Connecting Rod; 42, Upper Mounting Base; 43, Return Spring; 44, Die; 441, Mold Frame; 442, Mold Base; 45, Adjustment Mechanism; 451, Push Plate; 452, Back Plate; 453, Trapezoidal Block; 454, Mounting Chamber; 455, Pushing Assembly; 4551, Pressing Rotation Module; 4552, Cam; 46, Traction Spring. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] The present invention will be further described below with reference to embodiments.

[0034] Example:

[0035] Please see Figures 1-9 This invention provides a technical solution: a forming mold for heat exchanger parts based on a guide pillar structure, mounted on a stamping machine, comprising:

[0036] The stationary die 2 is connected to the upper end of the worktable 1 of the stamping machine, and the moving die 4 is connected to the lower end of the slide block 3 of the stamping machine and moves up and down with it.

[0037] The static mold 2 includes a lower mounting base 21. The upper end face of the lower mounting base 21 is slidably connected to a support plate 22 through a mounting groove 211. A punch 23 is fixedly connected to the mounting groove 211 and slidably connected to the support plate 22. A columnar seat 24 is rotatably connected to the mounting groove 211 in a matrix arrangement. The columnar seat 24 and the worktable 1 are connected by a composite connection of sliding and rotation. A limiting mechanism 25 for adjusting the lifting range of the lower mounting base 21 and the support plate 22 is connected to both the columnar seat 24 and the worktable 1.

[0038] The moving mold 4 includes an upper mounting base 42 that is slidably connected to the slider 3 via a connecting rod 41. A return spring 43 is sleeved on the connecting rod 41. The upper mounting base 42 is connected to a die 44 that is adapted to the punch 23. The die 44 consists of a mold frame 441 that is fixedly connected to the upper mounting base 42 and a mold seat 442 that is slidably connected in the mold frame 441. The upper mounting base 42 and the slider 3 are jointly connected to an adjustment mechanism 45 that changes the position of the mold seat 442 in the mold frame 441. The mold seat 442 and the upper mounting base 42 are connected by a traction spring 46.

[0039] A positioning column 26 is fixedly connected to the support plate 22. A countersunk column 27 is also fixedly connected to the support plate 22 in a matrix arrangement. The countersunk column 27 is slidably connected to the punch 23. A pressing column 28 adapted to the countersunk column 27 is fixedly connected to the upper mounting base 42. The pressing column 28 is slidably connected to the mold base 442.

[0040] Specifically, in the initial state, the limiting mechanism 25 is in the unlocked state. At this time, the lower mounting base 21 is pressed and can be moved to fit against the worktable 1. The support plate 22 is in a relatively high position in the mounting groove 211. The adjusting mechanism 45 is in the locked state, so that the mold base 442 is in a relatively low position in the mold frame 441. During processing, the robotic arm places the plate on the punch 23. Multiple positioning pins 26 play a guiding role during the placement of the plate, realizing the automatic centering and positioning of the plate on the punch 23.

[0041] After positioning, the press slide 3 moves down, causing the moving die 4 to move down for the first time. After the moving die 4 moves down to a certain distance, it contacts the stationary die 2 and is pushed down by the limiting mechanism 25 to fit against the worktable 1. At the same time, the upper mounting seat 42 is subjected to the reaction force, the return spring 43 is compressed, and the distance between the upper mounting seat 42 and the slide 3 is reduced. During this process, the sheet metal forms a heat exchange plate rough die under the extrusion action of the punch 23 and the die 44, and the edge of the plate leaves the material to be sheared.

[0042] After stamping is completed, the slider 3 moves upward and resets, causing the upper mounting seat 42 to move upward synchronously. At the same time, under the combined action of its own weight and the reset spring 43, the distance between the upper mounting seat 42 and the slider 3 returns to the initial state. During this process, the adjustment mechanism 45 is triggered and switched to the unlocked state, causing the mold base 442 to move upward relative to the mold frame 441. When the upper mounting seat 42 moves upward, it releases the pressure on the lower mounting seat 21. The lower mounting seat 21 moves upward under the action of the limiting mechanism 25, and the distance between it and the worktable 1 returns to the initial state. During the reset of the lower mounting seat 21, the limiting mechanism 25 changes from the unlocked state to the locked state, which reduces the maximum downward movement distance of the lower mounting seat 21, while increasing the maximum downward movement distance of the support plate 22, allowing it to slide down in the mounting groove 211.

[0043] When the slider 3 moves down for the second time, it drives the upper mounting base 42 to move down synchronously for the second time. After moving down a certain distance, the lower end of the mold frame 441 contacts the excess material at the edge of the heat exchanger rough mold. Since the mold base 442 has moved up a certain distance relative to the mold frame 441, it no longer contacts the upper end of the heat exchanger rough mold during the second downward movement, thus avoiding damage to the heat exchanger rough mold. As the upper mounting base 42 drives the mold frame 4 to continue moving down, the lower mounting base 21 is pushed down synchronously by the limiting mechanism 25. Since the maximum downward movement distance of the lower mounting base 21 has decreased, when the slider 3 moves down to the lowest point and drives the mold frame 4 to move down to the lowest point synchronously, the height of the punch 23 is higher than when it moves down for the first time. This makes the relative displacement between the mold frame 441 and the punch 23 greater than the first downward movement, thereby achieving the shearing of the excess material at the edge of the heat exchanger rough mold.

[0044] Similarly, when the slider 3 moves down for the first time, because the support plate 22 is in a relatively high position in the mounting groove 211, the upper end of the countersunk pin 27 is slightly higher than the upper end of the punch 23. During the process of the punch 23 and the die 44 extruding the plate to form the plate, a protrusion is formed on the plate. When the slider 3 moves down for the second time, the countersunk pin 27 moves down synchronously with the support plate 22. Because it is fixedly connected to the upper mounting seat 42, when the upper mounting seat 42 moves down to the lowest point, the relative displacement between the countersunk pin 27 and the punch 23 is greater than the first downward movement due to the decrease in the maximum downward movement distance of the lower mounting seat 21. As a result, a round hole is punched out on the protrusion of the heat exchange plate rough die.

[0045] After shearing is completed, slider 3 moves upward and resets for the second time, which drives upper mounting base 42 to move upward and reset for the second time. During the second reset of upper mounting base 42, the distance between it and slider 3 returns to the initial state, causing adjustment mechanism 45 to switch back to the locked state. The distance between mold base 442 and mold frame 441 returns to the initial height. After the lower mounting base 21 is released from pressure, it moves upward and resets again, and the distance between it and worktable 1 returns to the initial state. During this process, limit mechanism 25 also switches from the locked state to the initial unlocked state, and the maximum downward movement distance of lower mounting base 21 increases again.

[0046] When the slider 3 moves to its highest position, the robotic arm removes the stamped and cut heat exchanger from the punch 23 and removes the cutting waste from the support plate 22 and the punch 23 by strong air. Then the robotic arm places a new sheet on the punch 23 and repeats the above steps to finally achieve integrated processing of stamping and cutting.

[0047] Compared to conventional step-by-step processing, this embodiment uses the dynamic switching of the states of the limiting mechanism 25 and the adjusting mechanism 45 to adapt to different process requirements of forming, cutting, and punching during the two downward movements of the same mold. That is, the first downward movement ensures the complete forming of the heat exchanger rough mold, and the second downward movement adjusts the relative displacement of the punch 23, the mold frame 441, and the countersunk post 27 to accurately complete the shearing of the excess material and the processing of the round hole, thus solving the core contradiction of inconsistent forming and cutting benchmarks in conventional step-by-step processing.

[0048] From initial positioning of the sheet metal to forming, cutting, and punching, the entire process is based on punch 23, avoiding the cumulative positioning errors caused by transfer and secondary clamping in conventional step-by-step processing. This significantly improves the dimensional accuracy of the heat exchanger edges and holes. No manual adjustment of mold parameters is required throughout the process, which reduces auxiliary time and avoids accuracy fluctuations caused by human operation. Compared with the conventional step-by-step processing mode of "stopping to change molds and secondary positioning", this greatly improves processing stability and efficiency.

[0049] The limiting mechanism 25 includes a guide post 251, which is slidably connected to the top of the column base 24 and slidably connected to the support plate 22. The lower end of the guide post 251 is located inside the column base 24 and connected to a rotating component 252. A locking component 253 is connected to both the column base 24 and the support plate 22. A limiting component 254 is connected to both the column base 24 and the worktable 1. A positioning sleeve 255 adapted to the guide post 251 is fixedly connected to the upper mounting base 42. The two work together to ensure that the punch 23 and the die 44 are always precisely aligned during the processing.

[0050] The rotating assembly 252 includes a rotating cylinder 2521, which is slidably connected to a cylindrical base 24. A push block 2522 is fixedly connected to the lower end of the guide post 251. A guide groove 2523 is fixedly connected to the inner circumference of the rotating cylinder 2521. A guide block 2524 is fixedly connected to the outer circumference of the push block 2522. The guide block 2524 is slidably connected to the guide groove 2523. The lower end of the push block 2522 is connected to the guide post 251 through a compression spring 2525.

[0051] It is worth noting that the guide groove 2523 adopts a corrugated design, consisting of four interleaved and interconnected inclined sections and four vertical sections. The depth of the vertical sections gradually decreases from top to bottom, while the depth of the inclined sections gradually increases from top to bottom. At the crest of the wave, the depth of the vertical section is greater than the depth of the inclined section, and at the trough of the wave, the depth of the vertical section is less than the depth of the inclined section, so that the guide block 2524 slides only in one direction within the guide groove 2523.

[0052] The locking assembly 253 includes a locking seat 2531. Two locking seats 2531 are fitted onto the cylindrical seat 24. The upper locking seat 2531 is fixedly connected to the cylindrical seat 24, and the lower locking seat 2531 is fixedly connected to the lower mounting seat 21. The two locking seats 2531 are respectively fixedly connected to a corresponding and cooperating wedge block 2532 at their close ends.

[0053] The limiting component 254 includes a limiting block 2541, which is fixedly sleeved on the cylindrical base 24 and located below the lower mounting base 21. A limiting seat 2542 is fixedly connected to the worktable 1. A sliding groove 2543 that matches the contour of the limiting block 2541 is vertically opened in the limiting seat 2542. A support spring 2544 is sleeved on the cylindrical base 24 between the limiting block 2541 and the limiting seat 2542.

[0054] Specifically, in the initial state, under the elastic tension of the compression spring 2525, the push block 2522 is in a relatively high position in the cylindrical seat 24, and the guide block 2524 is located at the crest of the guide groove 2523; the wedges 2532 on the locking seat 2531 abut against each other, so that the support plate 22 is kept in a relatively high position in the mounting groove 211, providing stable support for the punch 23 and the die 44 to make initial contact with the stamping plate. At the same time, the limit seat 2542 and the slide 2543 are aligned, ensuring that the limit block 2541 can slide down along the slide 2543, so that when the lower mounting seat 21 is pressed down to the lowest position, its lower end can fit tightly against the worktable 1.

[0055] When the slider 3 moves downward for the first time and drives the upper mounting seat 42 to move downward synchronously, the positioning sleeve 255 first contacts the guide post 251. On the one hand, it realizes the precise positioning of the moving mold 4 and the stationary mold 2. On the other hand, it pushes the guide post 251 to move downward relative to the cylindrical seat 24, thereby driving the push block 2522 to move downward synchronously (the compression spring 2525 is further compressed). During this process, the guide block 2524 slides from the crest of the guide groove 2523 along the vertical section to the trough. As the upper mounting seat 42 continues to move downward, the guide post 251 pushes the lower mounting seat 21 to move downward synchronously. At this time, the limit block 2541 slides downward along the slide groove 2543, the support spring 2544 is compressed, and finally the lower end of the lower mounting seat 21 fits against the worktable 1. At the same time, the punch 23 and the die 44 work together, and the countersunk post 27 and the pressing post 28 cooperate to complete the stamping of the sheet metal and form the rough mold of the heat exchanger.

[0056] After stamping, when the slider 3 moves upward for the first time, the lower mounting base 21 moves upward and resets due to the disappearance of the pressure above, under the elastic force of the support spring 2544, and the limiting block 2541 disengages from the slide groove 2543; the guide post 251 and the push block 2522 also move upward and reset due to the disappearance of the pressure at the upper end, under the elastic force of the compression spring 2525. During the upward movement of the push block 2522, it drives the guide block 2524 to slide from bottom to top along the inclined section of the guide groove 2523. When the guide block 2524... When the slider slides to the crest of the guide groove 2523, the rotating cylinder 2521 rotates exactly 90 degrees, and drives the cylindrical seat 24 to rotate 90 degrees synchronously. The rotation of the cylindrical seat 24 causes the limiting block 2541 to rotate 90 degrees synchronously, resulting in the limiting block 2541 being misaligned with the slide groove 2543. Therefore, when the slider 3 moves down for the second time, the limiting block 2541 cannot enter the slide groove 2543 and is blocked by the limiting seat 2542, which reduces the maximum downward movement distance of the lower mounting seat 21 and makes it unable to fit with the worktable 1.

[0057] At the same time, the cylindrical seat 24 rotates 90 degrees, causing the upper locking seat 2531 to rotate synchronously, so that the wedge 2532 on the upper locking seat 2531 is misaligned with the wedge 2532 on the lower locking seat 2531, thereby releasing the restriction on the support plate 22. The support plate 22 can slide downward in the mounting groove 211, avoiding structural interference when the mold frame 441 is cutting the excess material at the edge of the hot-rolling sheet rough mold.

[0058] When the slider 3 is pressed down and reset for the second time, the cylindrical seat 24 rotates ninety degrees again, so that the limiting block 2541 is restored to the alignment state with the slide groove 2543, and the wedge block 2532 on the upper locking seat 2531 and the wedge block 2532 on the lower locking seat 2531 are re-aligned and abutted. The support plate 22 moves up and resets in the mounting groove 211, providing support for the next stamping and forming, so as to realize the continuous operation of the processing cycle.

[0059] The adjustment mechanism 45 includes a push plate 451, which is slidably connected to the upper end face of the upper mounting base 42. A backing plate 452 is fixedly connected to the upper end face of the mold base 442. Trapezoidal blocks 453 that correspond to each other and cooperate with each other are evenly fixedly connected to the end faces of the push plate 451 and the backing plate 452. An installation chamber 454 is fixedly connected to the upper end of the upper mounting base 42. A pushing component 455 is connected in the installation chamber 454.

[0060] The pushing component 455 includes a pressing and rotating module 4551. The principle of the pressing and rotating module 4551 is the same as that of the rotating component 252. A cam 4552 is fixedly connected to the lower end of the pressing and rotating module 4551.

[0061] Specifically, in the initial state, under the pushing action of the cam 4552, the trapezoidal block 453 at the lower end of the pusher plate 451 abuts against the pushing block 2522 below the abutment plate 452, so that the mold base 442 is in a relatively lower position within the mold frame 441. Therefore, when the slider 3 moves down for the first time, the die 44 and the punch 23 can make initial contact, stamping the sheet metal into a rough mold for the heat exchanger plate.

[0062] It should be noted that the working principle of the press-rotate module 4551 is the same as that of the rotating component 252, but there are differences: after being pressed once and reset, the press-rotate module 4551 rotates by 180 degrees (this angle can be achieved by changing the number of crests and troughs in the guide groove 2523).

[0063] As the upper mounting base 42 moves upward with the slider 3 for the first time, and returns to its initial distance from the slider 3 under the elastic force of the return spring 43, the cam 4552 pushes the push plate 451 to slide, causing the trapezoidal block 453 on the push plate 451 to misalign with the trapezoidal block 453 on the back plate 452. At this time, the mold base 442 moves upward within the mold frame 441 under the elastic force of the traction spring 46, thereby avoiding damage caused by re-contact with the heat exchanger rough mold during subsequent cutting and punching processes.

[0064] When the slider 3 moves down and resets for the second time, the pressing rotation module 4551 rotates 180 degrees again, and the cam 4552 drives the push plate 451 to slide back to the initial position, so that the trapezoidal block 453 at its lower end abuts against the push block 2522 below the abutment plate 452 again, preparing for the next stamping.

[0065] The advantage of this design is that in the adjustment mechanism 45, the push plate 451 and the abutment plate 452 cooperate with each other through multiple evenly arranged trapezoidal blocks 453. When the push plate 451 slides under the drive of the cam 4552, all the trapezoidal blocks 453 simultaneously contact and push the abutment plate 452, thereby driving the mold 4 seat to move down in the mold frame 441. Compared with the structure with force at a single point or a few points, this design with multiple trapezoidal blocks 453 evenly distributed can distribute the driving force to multiple positions of the mold seat 442, so that when the mold seat 442 contacts the sheet metal for stamping, the pressure on each area is more balanced, effectively avoiding the tilting of the mold seat 442 or uneven sheet metal forming (such as ripple height deviation, local wrinkling, etc.) caused by excessive local force.

[0066] Meanwhile, the symmetrical arrangement and synchronous movement of the trapezoidal blocks 453, combined with the high-precision guidance achieved by the moving mold 4 and the stationary mold 2 through the guide post 251 and the positioning sleeve 255, further ensures the uniform transmission of force. This advantage is particularly important in the forming of complex corrugated structures on the surface of the heat exchanger, which can ensure the dimensional consistency of each corrugated unit and improve the stability of product quality.

[0067] It is worth noting that the above-mentioned heat exchanger part forming mold based on the guide pillar structure also has the following advantages:

[0068] Advantage 1: In this embodiment, when the slider 3 moves down for the first time, the punch 23 and the die 44 cooperate to complete the stamping and forming of the heat exchanger plate rough die; when the slider 3 moves down for the second time, the maximum downward movement distance of the lower mounting base 21 is adjusted by the limiting mechanism 25, so that the relative displacement between the mold frame 441 and the punch 23 increases, and the rough die edge scrap is cut off simultaneously. At the same time, the countersunk pin 27 and the pressing pin 28 cooperate to complete the round hole processing. Compared with the traditional step-by-step processing that requires transfer and secondary clamping between the forming and cutting molds, this mold completes multiple processes in one clamping, reducing auxiliary time and investment in transfer equipment, and avoiding the cumulative error caused by secondary positioning.

[0069] Advantage 2: In this embodiment, when the plate is placed on the punch 23, the positioning post 26 on the support plate 22 can automatically center and position the plate. The punch 23 is used as the reference throughout the stamping and cutting process. The moving die 4 and the stationary die 2 are precisely connected to the positioning sleeve 255 through the guide post 251, ensuring that the relative position of the punch 23, the die 44, and the mold frame 441 is stable. This design avoids the positioning deviation caused by the non-coincidence of the secondary clamping reference in the traditional step-by-step processing, and significantly improves the edge size of the heat exchanger, the hole accuracy, and the sealing fit with adjacent heat exchangers.

[0070] Thirdly, in this embodiment, the push plate 451 and the abutment plate 452 cooperate through multiple evenly arranged trapezoidal blocks 453. When the push plate 451 slides under the drive of the cam 4552, all the trapezoidal blocks 453 simultaneously contact and push the abutment plate 452, causing the mold 4 seat to move smoothly within the mold frame 441. This multi-point uniform force design ensures that the pressure in each area of ​​the mold seat 442 is balanced during stamping, effectively avoiding defects such as deviation in the height of the heat exchanger surface ripples and local wrinkling caused by excessive local force, thus ensuring the stability of the forming quality of complex structures.

[0071] Fourthly, in this embodiment, the limiting mechanism 25 achieves dynamic state switching through the rotating component 252 and the locking and releasing component 253: when the slider 3 moves down for the first time, the limiting mechanism 25 is in the unlocked state, and the lower mounting base 21 can move down to fit against the worktable 1 to meet the molding requirements; after the slider 3 moves up and resets for the first time, the rotating component 252 drives the cylindrical base 24 to rotate, so that the limiting mechanism 25 switches to the locked state, reducing the maximum downward movement distance of the lower mounting base 21 to adapt to the secondary cutting requirements; after the secondary reset, it switches back to the initial state to achieve cyclic processing. This adaptive adjustment does not require manual intervention and ensures the coordinated and efficient operation of the molding and cutting processes.

[0072] Fifthly, in this embodiment, the precise guidance of the guide post 251 and the positioning sleeve 255 reduces the misalignment and friction between the punch 23 and the die 44; the elastic components such as the support spring 2544 in the limiting component 254 and the compression spring 2525 in the rotating component 252 can buffer the impact force and reduce the wear of the die edge; the uniform force design of the adjusting mechanism 45 avoids local structural overload. Compared with the frequent edge grinding and component replacement caused by unreasonable guidance and force of traditional dies, the wear rate of this die is significantly reduced, reducing the frequency of maintenance and cost.

[0073] Advantage 6: From feeding, positioning, forming, cutting to unloading finished products, no manual adjustment of mold parameters is required throughout the entire process; the state switching between the limit mechanism 25 and the adjustment mechanism 45 is automatically triggered by the movement of the slider 3, without the need to stop the machine to change the mold. This automated design reduces auxiliary time compared to the traditional "stop the machine to change the mold - secondary positioning" mode, greatly improves the effective operating rate of the equipment, and is suitable for batch continuous production.

[0074] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A forming die for heat exchanger parts based on a guide pillar structure, mounted on a stamping machine, characterized in that, include: A stationary die (2) is connected to the upper end of the worktable (1) of the stamping machine, and a moving die (4) is connected to the lower end of the slide (3) of the stamping machine and moves up and down accordingly. The static mold (2) includes a lower mounting base (21). The upper end face of the lower mounting base (21) is slidably connected to a support plate (22) through a mounting groove (211). A punch (23) is fixedly connected to the support plate (22) in the mounting groove (211). A columnar seat (24) is rotatably connected in a matrix arrangement in the mounting groove (211). The columnar seat (24) and the worktable (1) are connected by a combined sliding and rotating connection. A limiting mechanism (25) for adjusting the lifting range of the lower mounting base (21) and the support plate (22) is connected to both the columnar seat (24) and the worktable (1). The moving mold (4) includes an upper mounting base (42) that is slidably connected to the slider (3) via a connecting rod (41). A return spring (43) is sleeved on the connecting rod (41). The upper mounting base (42) is connected to a die (44) that is adapted to the punch (23). The die (44) consists of a mold frame (441) that is fixedly connected to the upper mounting base (42) and a mold seat (442) that is slidably connected in the mold frame (441). The upper mounting base (42) and the slider (3) are connected together to an adjustment mechanism (45) that changes the position of the mold seat (442) in the mold frame (441). The mold seat (442) and the upper mounting base (42) are connected by a traction spring (46).

2. The heat exchanger part forming mold based on the guide pillar structure according to claim 1, characterized in that: The limiting mechanism (25) includes a guide post (251), which is slidably connected to the top of the column base (24) and slidably connected to the support plate (22). The lower end of the guide post (251) is located inside the column base (24) and connected to a rotating component (252). A locking component (253) is connected to both the column base (24) and the support plate (22). A limiting component (254) is connected to both the column base (24) and the worktable (1). A positioning sleeve (255) adapted to the guide post (251) is fixedly connected to the upper mounting base (42).

3. The heat exchanger part forming mold based on the guide pillar structure according to claim 2, characterized in that: The rotating assembly (252) includes a rotating cylinder (2521) which is slidably connected in a cylindrical seat (24). A push block (2522) is fixedly connected to the lower end of the guide post (251). A guide groove (2523) is fixedly connected to the inner circumference of the rotating cylinder (2521). A guide block (2524) is fixedly connected to the outer circumference of the push block (2522). The guide block (2524) is slidably connected in the guide groove (2523). The lower end of the push block (2522) is connected to the guide post (251) through a compression spring (2525).

4. A heat exchanger part forming mold based on a guide pillar structure according to claim 2, characterized in that: The locking assembly (253) includes a locking seat (2531), two locking seats (2531) are sleeved on the cylindrical seat (24). The upper locking seat (2531) is fixedly connected to the cylindrical seat (24), and the lower locking seat (2531) is fixedly connected to the lower mounting seat (21). The two locking seats (2531) are respectively fixedly connected to a corresponding and mutually cooperating wedge (2532) at their close ends.

5. A heat exchanger part forming mold based on a guide pillar structure according to claim 2, characterized in that: The limiting component (254) includes a limiting block (2541), which is fixedly sleeved on the cylindrical base (24) and located below the lower mounting base (21). A limiting seat (2542) is fixedly connected to the worktable (1). A groove (2543) that matches the contour of the limiting block (2541) is vertically opened in the limiting seat (2542). A support spring (2544) is sleeved on the cylindrical base (24) between the limiting block (2541) and the limiting seat (2542).

6. A heat exchanger part forming mold based on a guide pillar structure according to claim 1, characterized in that: The adjustment mechanism (45) includes a push plate (451), which is slidably connected to the upper end face of the upper mounting base (42). A stop plate (452) is fixedly connected to the upper end face of the mold base (442). Trapezoidal blocks (453) that correspond to each other and cooperate with each other are evenly fixedly connected to the end faces of the push plate (451) and the stop plate (452). An installation chamber (454) is fixedly connected to the upper end of the upper mounting base (42), and a pushing component (455) is connected in the installation chamber (454).

7. A heat exchanger part forming mold based on a guide pillar structure according to claim 6, characterized in that: The pushing component (455) includes a pressing and rotating module (4551), which operates on the same principle as the rotating component (252). A cam (4552) is fixedly connected to the lower end of the pressing and rotating module (4551).

8. A heat exchanger part forming mold based on a guide pillar structure according to claim 1, characterized in that: A positioning column (26) is fixedly connected to the support plate (22), and countersunk columns (27) are fixedly connected to the support plate (22) in a matrix arrangement. The countersunk columns (27) are slidably connected to the punch (23). A pressing column (28) adapted to the countersunk column (27) is fixedly connected to the upper mounting base (42), and the pressing column (28) is slidably connected to the mold base (442).

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