CN111957795A - Pressing die mechanism capable of quickly changing die for machining heat exchange fins - Google Patents

Abstract

The invention discloses a die pressing mechanism capable of quickly changing a die for machining a heat exchange fin, and relates to the technical field of heat exchange fin machining. This heat transfer fin processing is with die pressing mechanism that can change mould fast, the motor starts the back, can drive the connector through driving belt, the movable sleeve, well core rod and thread bush all rotate, like this alright realize quick upset to die pressing mechanism, the fixed plate utilizes being connected of external screw thread sleeve and thread bush promptly, can follow well core rod and together rotate to realize the retooling purpose, in order to satisfy quick retooling needs, time and manpower have greatly been saved, also convenient production simultaneously.

Description

Pressing die mechanism capable of quickly changing die for machining heat exchange fins

Technical Field

The invention relates to the technical field of heat exchange fin machining, in particular to a die pressing mechanism capable of quickly changing a die for machining a heat exchange fin.

Background

The finned radiator is one heat exchanger with fins on common base pipe for strengthening heat transfer, and the finned radiator is one important heat exchanger element produced with special mold and basically high-efficiency continuous production mode.

The action response of the heat exchange fin production die is quick, and manual die change can be realized by one die with multiple cores.

However, the existing heat exchange fin production die is fixed in structure, automatic die changing cannot be achieved, on a heat exchange fin production line with special needs, an ordinary die pressing mechanism cannot achieve automatic and quick die switching, the production line is long in dead time due to manual die changing, manpower and time are consumed, and production efficiency is not improved favorably.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a die pressing mechanism capable of quickly changing a die for processing a heat exchange fin, and solves the problems in the background technology.

In order to achieve the purpose, the invention is realized by the following technical scheme: a die pressing mechanism capable of quickly changing a die for processing a heat exchange fin comprises a bottom plate, a lower die, a supporting mechanism, a lifting mechanism, an upper die and a die sucking mechanism, wherein the lower die is welded on the upper surface of the bottom plate, material grooves are formed in two sides of the upper edge of the lower die, material passing rollers are rotatably matched in the inner sides of the material grooves, jacks are respectively formed in two ends of each material groove, the supporting mechanism is respectively arranged on the outer sides of the material grooves through the jacks, the lifting mechanism is respectively arranged at four corners of the upper surface of the lower die, guide rods are vertically arranged on two sides of the lower die, the bottom ends of the guide rods are respectively welded on two sides of the upper surface of the bottom plate, the upper die is arranged above the lower die, side plates are respectively welded on the outer walls of two sides of the upper die in a vertical mode, guide holes are respectively penetrated through the inner parts of the side plates, the guide rods respectively penetrate through the guide holes, and shift the inside of groove and run through and have well core rod, well core rod's outer tip all welds the movable sleeve, and the tip of movable sleeve all is fixed with the connector, well core rod's inner tip all overlaps and is equipped with the thread bush, the outside joint of connector has driving belt, and driving belt's the other end is connected with the motor, the motor is settled respectively at the inside both ends of last mould and lower mould, inhale mould mechanism and settle respectively in last mould and lower mould, and inhale mould mechanism and comprise fixed plate, connecting rod, external screw thread sleeve, technology board, negative pressure otter board and trachea.

Optionally, bearing mechanism comprises inserted bar, locking bolt, connecting rod and layer board, the inserted bar cooperation of pegging graft respectively in the jack, and the inserted bar inserts the equal threaded connection of the inside one end tip of lower mould has locking bolt, the outer end of inserted bar links to each other there is the connecting rod, and the outside cover of connecting rod is equipped with the layer board, high parallel and level between layer board and the material roller.

Optionally, elevating system comprises pneumatic cylinder, hydraulic stem, slide cartridge, spacing dish and sliding sleeve, the pneumatic cylinder is fixed respectively in the top four corners position of lower mould, and the output of pneumatic cylinder all is connected with the hydraulic stem, the outside of hydraulic stem all overlaps and is equipped with the slide cartridge, and the top of slide cartridge all is fixed with spacing dish, the sliding sleeve has all been cup jointed in the outside of slide cartridge, and the sliding sleeve is fixed welding respectively in the opening face four corners position of last mould.

Optionally, a clamping block is welded on the inner ring wall of the sliding sleeve, a supporting plate is fixed at the end of the clamping block, the supporting plate is connected with the top end of the hydraulic rod, and the vertical central line of the supporting plate coincides with the central axis of the sliding sleeve.

Optionally, a sliding groove is formed in the wall of the sliding barrel, and the clamping block is slidably mounted in the sliding groove.

Optionally, a tooth path is fixed in the middle of the inner side of the displacement groove, a tooth sleeve is sleeved on the outer wall of the middle section of the central rod, and the tooth grooves of the tooth sleeve and the tooth path are meshed with each other.

Optionally, the middle parts of the two ends of the fixing plate are respectively fixed with a connecting rod, the end parts of the connecting rods are respectively sleeved with an external thread sleeve in a rotating mode, and the external thread sleeves are respectively in threaded connection with the thread sleeves.

Optionally, both ends of the fixed plate are provided with pipe grooves, the inner sides of the pipe grooves are provided with air pipes, the fixed plate is hollow, and the inner cavity of the fixed plate is communicated with the air pipes.

Optionally, the upper surface and the lower surface of the fixed plate are both provided with a process plate and a negative pressure screen plate, the process plate is arranged at equal intervals along the horizontal longitudinal direction of the fixed plate, the negative pressure screen plate is arranged at equal intervals along the horizontal transverse direction of the fixed plate, and the negative pressure screen plate is communicated with the inner cavity of the fixed plate.

The invention provides a die pressing mechanism capable of quickly changing a die for machining a heat exchange fin, which has the following beneficial effects:

1. this heat transfer fin processing is with die pressing mechanism that can change mould fast, the motor starts the back, can drive the connector through driving belt, the movable sleeve, well core rod and thread bush all rotate, like this alright realize quick upset to die pressing mechanism, the fixed plate utilizes being connected of external screw thread sleeve and thread bush promptly, can follow well core rod and together rotate to realize the retooling purpose, in order to satisfy quick retooling needs, time and manpower have greatly been saved, also convenient production simultaneously.

2. This heat transfer fin processing is with compression moulding mechanism that can change mould fast through bearing mechanism bearing fin and raw and other materials for the fin that has processed can steadily be exported, and unprocessed raw and other materials also can steadily get into, guarantees production quality, avoids finished product scratch or damage, and locking bolt is used for fixed inserted bar, and the inserted bar passes through locking bolt to be fixed in the both sides of lower mould, has made things convenient for the installation and has dismantled, and the connecting rod makes the layer board overturn from top to bottom, with adjustment business turn over material angle.

3. This heat transfer fin processing is with compression moulding mechanism that can change mould fast, the power of the up-and-down motion is provided for last mould through elevating system, make and to accomplish the action of opening and shutting the mould smoothly, the hydraulic cylinder control hydraulic stem is flexible, flexible hydraulic stem can drive the sliding sleeve and reciprocate immediately, because the sliding structure between fixture block and the spout, make the sliding sleeve can do stable reciprocating motion along the slide cartridge, after the sliding sleeve reciprocates, last mould reciprocates immediately, accomplish the action of opening and shutting the mould between the lower mould, utilize elevating system control to go up the mould and go up the lift, the lift process is stable, can not cause great oppression damage to the hydraulic pressure elevating system of hydraulic cylinder and hydraulic stem yet.

4. This heat transfer fin processing is with die pressing mechanism that can change mould fast through the setting of tooth cover for well core rod can enough realize removing in the shifting groove, can not slide at will again, and stability obtains improving.

5. This heat transfer fin processing is with die pressing mechanism that can change mould fast places the trachea through the chase for the trachea can not take place the friction and appear damaging with the inner wall of lower mould or last mould at the frequent rotatory in-process of fixed plate, and the trachea is used for taking out the air of putting the fixed plate inner chamber simultaneously, makes fixed plate inner chamber atmospheric pressure change, and then can utilize the atmospheric pressure effect to fix the mold core.

6. This heat transfer fin processing is with moulding-die mechanism that can change mould fast, can fix the mold core through clamping anchor clamps on the technology board, the negative pressure otter board is because of communicating with each other with the fixed plate inner chamber, so after taking away fixed plate inner chamber air, can produce the negative pressure in negative pressure otter board position, utilize this negative pressure effort, fix the mold core on the fixed plate intact, the upper and lower surface of fixed plate all can the clamping fix different mold cores, on the production line that needs to change different mold cores in short-term, the two-sided clamping design of fixed plate has saved the retooling time undoubtedly.

Drawings

FIG. 1 is a schematic view of a split structure according to the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic view of the supporting mechanism of the present invention;

FIG. 4 is a schematic structural diagram of the lifting mechanism of the present invention;

FIG. 5 is a schematic view of the sliding sleeve of the present invention illustrating the top view of the inner structure thereof;

FIG. 6 is a schematic view of the internal structure of the shift tank of the present invention;

FIG. 7 is a schematic structural view of a mold sucking mechanism according to the present invention.

In the figure: 1. a base plate; 2. a lower die; 3. a trough; 4. a material passing roller; 5. a jack; 6. a support mechanism; 7. inserting a rod; 8. locking the bolt; 9. a connecting rod; 10. a support plate; 11. a lifting mechanism; 12. a hydraulic cylinder; 13. a hydraulic lever; 14. a slide cylinder; 15. a chute; 16. a limiting disc; 17. a sliding sleeve; 18. a support plate; 19. a clamping block; 20. a guide bar; 21. an upper die; 22. a side plate; 23. a guide hole; 24. a shifting groove; 25. a tooth track; 26. a center pole; 27. a gear sleeve; 28. a movable sleeve; 29. a connector; 30. a threaded sleeve; 31. a drive belt; 32. a motor; 33. a mold suction mechanism; 34. a fixing plate; 35. a connecting rod; 36. an externally threaded sleeve; 37. a pipe groove; 38. a process plate; 39. a negative pressure screen plate; 40. the trachea.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 7, the present invention provides a technical solution: a pressing die mechanism capable of rapidly changing dies for processing heat exchange fins comprises a bottom plate 1, a lower die 2, a supporting mechanism 6, a lifting mechanism 11, an upper die 21 and a die sucking mechanism 33, wherein the lower die 2 is welded on the upper surface of the bottom plate 1, troughs 3 are arranged on two sides of the upper edge of the lower die 2, material passing rollers 4 are rotatably matched on the inner sides of the troughs 3, jacks 5 are respectively arranged at two ends of each trough 3, the supporting mechanism 6 is respectively arranged on the outer sides of the troughs 3 through the jacks 5, the supporting mechanism 6 comprises inserting rods 7, locking bolts 8, connecting rods 9 and supporting plates 10, the inserting rods 7 are respectively inserted and matched in the jacks 5, the locking bolts 8 are respectively connected to the end parts of the inserting rods 7 inserted into the lower die 2 in a threaded manner, the connecting rods 9 are arranged at the outer ends of the inserting rods 7, the supporting plates 10 are sleeved on the outer sides of the connecting rods 9, the supporting plates 10 are flush with the material passing rollers 4, the machined fins can be stably output, unprocessed raw materials can also enter stably, the production quality is guaranteed, finished products are prevented from being scratched or damaged, the locking bolts 8 are used for fixing the insertion rods 7, the insertion rods 7 are fixed on two sides of the lower die 2 through the locking bolts 8, the installation and the disassembly are convenient, and the supporting plate 10 can be turned over up and down through the connecting rod 9 to adjust the feeding and discharging angles;

the lifting mechanism 11 is respectively arranged at four corners of the upper surface of the lower die 2, guide rods 20 are vertically arranged at two sides of the lower die 2, the bottom ends of the guide rods 20 are respectively welded at two sides of the upper surface of the bottom plate 1, the upper die 21 is arranged above the lower die 2, side plates 22 are vertically welded on the outer walls of two sides of the upper die 21, guide holes 23 penetrate through the side plates 22, the guide rods 20 respectively penetrate through the guide holes 23, the lifting mechanism 11 is composed of a hydraulic cylinder 12, a hydraulic rod 13, a sliding cylinder 14, a limiting disc 16 and a sliding sleeve 17, the hydraulic cylinder 12 is respectively fixed at four corners of the upper side of the lower die 2, the output end of the hydraulic cylinder 12 is connected with the hydraulic rod 13, the sliding cylinder 14 is sleeved at the outer side of the hydraulic rod 13, the limiting disc 16 is fixed at the top end of the sliding cylinder 14, the sliding sleeve 17 is sleeved at the outer side of the sliding cylinder 14, and the sliding sleeve 17, a fixture block 19 is welded on the inner ring wall of the sliding sleeve 17, a support plate 18 is fixed at the end part of the fixture block 19, the support plate 18 is connected with the top end of the hydraulic rod 13, the vertical central line of the support plate 18 is superposed with the central axis of the sliding sleeve 17, a sliding groove 15 is arranged on the wall of the sliding sleeve 14, and the fixture block 19 is slidably installed in the sliding groove 15;

the lifting mechanism 11 is used for providing power for the up-and-down movement of the upper die 21, so that the die opening and closing action can be completed smoothly, the hydraulic cylinder 12 controls the hydraulic rod 13 to stretch and retract, the telescopic hydraulic rod 13 can drive the sliding sleeve 17 to move up and down immediately, the sliding sleeve 17 can do stable up-and-down movement along the sliding barrel 14 due to the sliding structure between the fixture block 19 and the sliding groove 15, the upper die 21 moves up and down immediately after the sliding sleeve 17 moves up and down, the die opening and closing action with the lower die 2 is completed, the lifting mechanism 11 is used for controlling the lifting of the upper die 21, the lifting process is stable, and large compression damage can not be caused to a hydraulic lifting mechanism;

the front side wall and the rear side wall of the upper die 21 and the lower die 2 are respectively provided with a displacement groove 24, a central rod 26 penetrates through the displacement groove 24, the middle part of the inner side of the displacement groove 24 is fixedly provided with a tooth path 25, the outer wall of the middle section of the central rod 26 is sleeved with a tooth sleeve 27, the tooth sleeves 27 are meshed with the tooth path 25, the tooth sleeves 27 are arranged, the central rod 26 can move in the displacement groove 24 and cannot slide freely, the stability is improved, the outer end part of the central rod 26 is welded with a movable sleeve 28, the end part of the movable sleeve 28 is fixedly provided with a connector 29, the inner end part of the central rod 26 is sleeved with a thread sleeve 30, the outer side of the connector 29 is clamped with a transmission belt 31, the other end of the transmission belt 31 is connected with a motor 32, the motor 32 is respectively arranged at the two inner ends of the upper die 21 and the lower die 2, and, The movable sleeve 28, the central rod 26 and the threaded sleeve 30 rotate, so that the die-sucking mechanism 33 can be quickly turned over to meet the requirement of quick die change, time and labor are greatly saved, and production is convenient;

the mold suction mechanism 33 is respectively arranged in the upper mold 21 and the lower mold 2, the mold suction mechanism 33 is composed of a fixing plate 34, a connecting rod 35, an external thread sleeve 36, a process plate 38, a negative pressure screen plate 39 and an air pipe 40, the connecting rod 35 is fixed in the middle of each of two ends of the fixing plate 34, the external thread sleeve 36 is rotatably sleeved on each end of the connecting rod 35, the external thread sleeve 36 is respectively in threaded connection with the thread sleeve 30, the fixing plate 34 is connected with the thread sleeve 30 through the external thread sleeve 36, so that the fixing plate can rotate along with the central rod 26 to achieve the purpose of mold changing, pipe grooves 37 are arranged on the end faces of two ends of the fixing plate 34, the air pipe 40 is arranged on the inner side of each pipe groove 37, the fixing plate 34 is hollow, the inner cavity of the fixing plate 34 is communicated with the air pipe 40, and the pipe grooves 37 are used for placing the air pipe 40, so that the air pipe 40 cannot be, meanwhile, the air pipe 40 is used for exhausting air in the inner cavity of the fixed plate 34, so that the air pressure in the inner cavity of the fixed plate 34 is changed, the mold core can be fixed by utilizing the air pressure, the upper surface and the lower surface of the fixed plate 34 are both provided with the process plate 38 and the negative pressure screen plate 39, the process plate 38 is arranged at equal intervals along the horizontal longitudinal direction of the fixed plate 34, the negative pressure screen plate 39 is arranged at equal intervals along the horizontal transverse direction of the fixed plate 34, the negative pressure screen plate 39 is communicated with the inner cavity of the fixed plate 34, the mold core can be fixed on the fixed plate 34 without damage by utilizing the negative pressure acting force after the air in the inner cavity of the fixed plate 34 is exhausted, the negative pressure screen plate 39 can generate negative pressure at the position of the negative pressure screen plate 39, the mold core can be fixed on the fixed plate 34 without damage by utilizing the negative pressure, the double-sided clamping design of the fixing plate 34 undoubtedly saves the die change time.

In summary, when the mold pressing mechanism capable of rapidly changing the mold for machining the heat exchange fin is used, the positions of the mold absorbing mechanisms 33 in the lower mold 2 and the upper mold 21 are horizontally moved according to actual conditions, the mold absorbing mechanisms 33 in the lower mold 2 and the upper mold 21 are adjusted to be in a right-facing state, then the two mold cores are respectively installed on the two mold absorbing mechanisms 33, the two fixing modes of the mold cores on the mold absorbing mechanisms 33 are two, one mode is that the mold cores are fixed by assembling a clamp on a process plate 38, the other mode is that air in the inner cavity of a fixing plate 34 is pumped away through an air pipe 40, negative pressure can be generated at the position of a negative pressure screen plate 39, the mold cores are further fixed on the fixing plate 34, two different mold cores can be installed on the same fixing plate 34 according to actual production requirements, then the upper and lower angles of the supporting plate 10 are adjusted, and;

raw materials which are not processed enter the mechanism from a trough 3 at one side, a hydraulic cylinder 12 is started, a hydraulic rod 13 is contracted, a sliding sleeve 17 moves downwards, an upper die 21 presses a lower die 2, after the die pressing is finished, the hydraulic cylinder 12 is started, the hydraulic rod 13 extends, the sliding sleeve 17 moves upwards, the upper die 21 leaves the lower die 2, an external feeding device drags the materials forwards for a section of length, and then the actions are circulated, so that the continuous die pressing work can be finished, when the die core needs to be replaced, an air pressure fixing mode can be directly considered, namely air in an inner cavity of a fixing plate 34 is sucked by an air pipe 40, the air pressure at the position of a negative pressure screen plate 39 is adjusted, the mode for fixing the die core is quick and convenient, the die replacement time can be greatly shortened, meanwhile, a motor 32 can be started for a production line needing to replace different die cores in a short, therefore, the suction mold mechanism 33 can be quickly turned over to meet the requirement of quick mold change, so that time and labor are greatly saved, and the production is convenient.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (9)

1. The utility model provides a but heat transfer fin processing is with die pressing mechanism of quick die change, includes bottom plate (1), lower mould (2), bearing mechanism (6), elevating system (11), goes up mould (21) and suction mould mechanism (33), its characterized in that: the upper surface of the bottom plate (1) is welded with a lower die (2), the two sides of the upper edge of the lower die (2) are respectively provided with a trough (3), the inner side of the trough (3) is respectively and rotatably matched with a material passing roller (4), the two ends of the trough (3) are respectively and uniformly provided with jacks (5), the supporting mechanism (6) is respectively arranged at the outer side of the trough (3) through the jacks (5), the lifting mechanisms (11) are respectively arranged at the four corners of the upper surface of the lower die (2), the two sides of the lower die (2) are respectively and vertically provided with guide rods (20), the bottom ends of the guide rods (20) are respectively and uniformly welded at the two sides of the upper surface of the bottom plate (1), the upper die (21) is arranged above the lower die (2), the outer walls of the two sides of the upper die (21) are respectively and vertically welded with side plates (22), guide holes (23) are respectively penetrated through the inner parts of the side plates (22), and the guide rods (20, the front side wall and the rear side wall of the upper die (21) and the lower die (2) are both provided with a displacement groove (24), a central rod (26) penetrates through the interior of the displacement groove (24), movable sleeves (28) are welded at the outer end parts of the central rod (26), and the end parts of the movable sleeves (28) are all fixed with connectors (29), the inner end parts of the central rods (26) are all sleeved with threaded sleeves (30), the outer sides of the connectors (29) are clamped with transmission belts (31), and the other end of the transmission belt (31) is connected with a motor (32), the motor (32) is respectively arranged at the two ends of the inner part of the upper die (21) and the lower die (2), the die sucking mechanisms (33) are respectively arranged in the upper die (21) and the lower die (2), and the suction mould mechanism (33) consists of a fixed plate (34), a connecting rod (35), an external thread sleeve (36), a process plate (38), a negative pressure screen plate (39) and an air pipe (40).

2. The die pressing mechanism capable of rapidly changing the die for machining the heat exchange fin as claimed in claim 1, wherein: bearing mechanism (6) comprises inserted bar (7), locking bolt (8), connecting rod (9) and layer board (10), inserted bar (7) are pegged graft the cooperation respectively in jack (5), and inserted bar (7) insert the equal threaded connection of the inside one end tip of lower mould (2) and have locking bolt (8), the outer end of inserted bar (7) links to each other has connecting rod (9), and the outside cover of connecting rod (9) is equipped with layer board (10), layer board (10) and cross high parallel and level between material roller (4).

3. The die pressing mechanism capable of rapidly changing the die for machining the heat exchange fin as claimed in claim 1, wherein: elevating system (11) comprises pneumatic cylinder (12), hydraulic stem (13), slide cartridge (14), spacing dish (16) and sliding sleeve (17), the top four corners position at lower mould (2) is fixed respectively in pneumatic cylinder (12), and the output of pneumatic cylinder (12) all is connected with hydraulic stem (13), the outside of hydraulic stem (13) all is overlapped and is equipped with slide cartridge (14), and the top of slide cartridge (14) all is fixed with spacing dish (16), sliding sleeve (17) have all been cup jointed in the outside of slide cartridge (14), and sliding sleeve (17) fixed welding respectively is in the opening face four corners position of last mould (21).

4. The die pressing mechanism capable of rapidly changing the die for machining the heat exchange fin as claimed in claim 3, wherein: the inner ring wall of the sliding sleeve (17) is welded with a clamping block (19), the end part of the clamping block (19) is fixed with a supporting plate (18), the supporting plate (18) is connected with the top end of the hydraulic rod (13), and the vertical central line of the supporting plate (18) is overlapped with the central axis of the sliding sleeve (17).

5. The die pressing mechanism capable of rapidly changing the die for machining the heat exchange fin as claimed in claim 4, wherein: the wall of the sliding barrel (14) is provided with a sliding groove (15), and the clamping block (19) is slidably arranged in the sliding groove (15).

6. The die pressing mechanism capable of rapidly changing the die for machining the heat exchange fin as claimed in claim 1, wherein: tooth tracks (25) are fixed in the middle of the inner side of the displacement groove (24), a tooth sleeve (27) is sleeved on the outer wall of the middle section of the central rod (26), and the tooth grooves of the tooth sleeve (27) and the tooth tracks (25) are meshed with each other.

7. The die pressing mechanism capable of rapidly changing the die for machining the heat exchange fin as claimed in claim 1, wherein: the middle parts of the two ends of the fixing plate (34) are respectively fixed with a connecting rod (35), the end parts of the connecting rods (35) are respectively sleeved with an external thread sleeve (36) in a rotating mode, and the external thread sleeves (36) are respectively in threaded connection with the thread sleeves (30).

8. The die pressing mechanism capable of rapidly changing the die for machining the heat exchange fin as claimed in claim 1, wherein: both ends of the fixed plate (34) are provided with pipe grooves (37), the inner sides of the pipe grooves (37) are provided with air pipes (40), the fixed plate (34) is hollow, and the inner cavity of the fixed plate (34) is communicated with the air pipes (40).

9. The die pressing mechanism capable of rapidly changing the die for machining the heat exchange fin as claimed in claim 1, wherein: the upper surface and the lower surface of the fixing plate (34) are respectively provided with a process plate (38) and a negative pressure screen plate (39), the process plates (38) are arranged at equal intervals along the horizontal longitudinal direction of the fixing plate (34), the negative pressure screen plates (39) are arranged at equal intervals along the horizontal transverse direction of the fixing plate (34), and the negative pressure screen plates (39) are communicated with the inner cavity of the fixing plate (34).

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