Heat exchange sheet punching device for plate heat exchanger production

Abstract

The invention discloses a heat exchange sheet punching device for plate heat exchanger production. The punching device comprises a punching rack, a punching column head and a driving mechanism used for driving the punching column head to move up and down are arranged on the punching rack, the driving mechanism and the punching column head are in transition connection through a connecting plate, a stamping die is arranged on the punching rack, and an upper chain wheel and a lower chain wheel are rotationally arranged on the punching rack. The upper chain wheel and the lower chain wheel are connected through a chain, a connecting arm is arranged on the connecting plate, and the connecting arm is fixedly connected with a corresponding outer chain link in the chain; a driving gear is coaxially fixed to the lower chain wheel, a rack sliding front and back is arranged on the punching rack, and the rack is in transmission fit with the driving gear through a driven gear. A supporting table sliding up and down is arranged on one side of the rack, a guide groove is formed in the supporting table and sequentially comprises a lifting section, a transition section and a descending section from back to front, the lifting section is located below the descending section, and an interference part in sliding fit with the guide groove is fixed to the punching rack.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange plate production, in particular to a heat exchange plate punching device for plate heat exchanger production. BACKGROUND

[0002] Plate heat exchanger is a kind of high-efficiency and compact heat exchange equipment, widely used in heating, ventilation, air conditioning, food and beverage, chemical industry, energy and other fields. Its core advantage is to form a complex flow channel by stacking a large number of thin metal plates, and to realize efficient heat transfer between cold and hot fluids.

[0003] The core heat transfer element of plate heat exchanger is heat exchange plate, which is usually made of corrosion-resistant metal (such as 304 / 316 stainless steel, titanium, hastelloy) by stamping, with a thickness of only 0.4-1.0mm. The surface of the plate is pressed with special corrugations (such as herringbone, horizontal straight lines), which greatly increase the heat transfer area and the degree of fluid turbulence, significantly improve the heat transfer efficiency (up to 3-5 times of the shell and tube type), enhance the rigidity of the plate, withstand certain pressure difference, and support each other to form uniform flow channel. Cold and hot fluids flow in opposite or staggered directions in the narrow flow channel formed by the corrugations, and quickly exchange heat through the extremely thin metal plate. The strong turbulence induced by the corrugations destroys the boundary layer, so that high-efficiency heat transfer can be achieved even at low flow rate.

[0004] The heat exchange plate needs to punch medium inlet and outlet holes (corner holes) at the four corners of the plate, which serve as channels for cold and hot fluids to enter and exit the inter-plate flow channel. Chinese patent No. 202420604266.6 discloses a "plate heat exchanger plate punching device", which needs to manually place the heat exchange plate on the stamping die, align the position to be punched on the heat exchange plate with the die hole in the stamping die, and then operate the stamping punch to punch. This punching method requires the operator to hold the heat exchange plate for punching, and often needs to put his hand into the punching area during positioning, so the safety of manual operation is difficult to guarantee. SUMMARY

[0005] The present application aims to provide a heat exchange plate punching device for plate heat exchanger production to solve the problems raised in the background art.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a heat exchange sheet punching device for plate heat exchanger production, comprising a punching rack, a punching stud is arranged on the punching rack, and a driving mechanism for driving the punching stud to move up and down is arranged on the punching rack, the driving mechanism and the punching stud are connected through a connecting plate, a corresponding punching die is arranged on the punching rack below the punching stud, an upper sprocket and a lower sprocket are rotatably arranged on the punching rack, the upper sprocket and the lower sprocket are vertically distributed, the upper sprocket and the lower sprocket are connected through a chain, a connecting arm extending to the chain is arranged on the connecting plate, and the connecting arm is fixedly connected with a corresponding outer link in the chain; the lower sprocket is coaxially fixed with a driving gear, and a rack that can slide forward and backward is arranged on the punching rack, and the rack is in transmission cooperation with the driving gear through a driven gear; A supporting table that can slide up and down is arranged on one side of the rack, a guide groove that extends integrally front and back is arranged on the supporting table, the guide groove sequentially comprises a lifting section, a transition section and a descending section from back to front, the lifting section is below the descending section, and an interference piece that is in sliding cooperation with the guide groove is fixed on the punching rack; the interference piece is in the lifting section, and the top surface of the supporting table is above the top surface of the punching die; the interference piece is in the descending section, and the top surface of the supporting table is below the top surface of the punching die.

[0007] Preferably, the punching rack is composed of a lower rack and an upper rack, the lower rack and the upper rack are connected through a rack connecting part, the driving mechanism and the punching stud are located on the upper rack, the punching die is located on the lower rack, and the punching stud is aligned with the die hole of the punching die.

[0008] Preferably, the top of the lower rack is provided with a punching die table, and the punching die is fixed on the top of the punching die table.

[0009] Preferably, the driving mechanism is a hydraulic cylinder, and the hydraulic cylinder is fixed on the upper rack through a fastener.

[0010] Preferably, the interference piece is a metal piece with a U-shaped structure, the middle section of the interference piece is located in the guide groove, and the two end arms of the interference piece are fixed on the punching die table.

[0011] Preferably, the rack is specifically arranged on the upper surface of the punching die table, a sliding rail one is fixed on the upper surface of the punching die table, a sliding block one is in sliding cooperation with the sliding rail one, a rack fixing seat is fixed on the sliding block one, and the rack is fixed on the rack fixing seat.

[0012] Preferably, a connecting seat is fixed on one side of the rack fixing seat, a sliding rail two that extends up and down is arranged on the connecting seat, a sliding block two is in sliding cooperation with the sliding rail two, and the supporting table is fixed on the sliding block two.

[0013] Preferably, the support table is provided on the support table.

[0014] Preferably, a drop hole is vertically arranged through the stamping die table, the drop hole vertically corresponds to the die hole in the stamping die, and an inclined sliding table is further arranged on the lower frame, the sliding table is located directly below the drop hole, and the front side of the lower frame is provided with a discharge port corresponding to the sliding table.

[0015] Preferably, a check plate is sleeved outside the punching stud, the check plate is transitionally connected with the connecting plate 21 through a spring, and the bottom surface height of the check plate is lower than the bottom surface height of the punching stud when the spring is in a natural extension state.

[0016] Compared with the prior art, the present application has the following advantages: 1. According to the present application, the support table is designed to be linked with the punching stud, when no punching operation is performed, the support table is located outside the punching area, the heat exchange plate to be punched is placed on the support table, then the punching stud is controlled to punch, during the punching process, the support table automatically transfers the heat exchange plate to the stamping die for punching through linkage transmission (upper sprocket, lower sprocket, driving gear, driven gear, rack transmission), after the punching is completed, the heat exchange plate with punched holes is continuously transferred to the support table and sent out of the punching area through reverse transmission, when the operator operates the device for punching, the operator's limbs are prevented from being injured by punching action due to misoperation, and the operation safety is greatly improved.

[0017] 2. According to the present application, manual holding of the heat exchange plate for punching is not required, the punching is stable, and the scrap rate is reduced.

[0018] 3. According to the present application, the check plate is sleeved outside the punching stud, the check plate is transitionally connected with the connecting plate 21 through a spring, during the process that the punching stud moves downward and punches, the check plate first contacts the heat exchange plate and tightly presses the heat exchange plate through the elastic force of the spring, and then the punching is completed; after the punching is completed, the punching stud moves upward and demolds, after the punching stud completely separates from the heat exchange plate, the check plate separates from the heat exchange plate, so that the punching stud can be smoothly demolded from the hole position of the heat exchange plate, and the demolding is prevented from being stuck. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Working condition of the present application Figure 1 (punching); Figure 2 Working condition of the present application Figure 2 (not punching); Figure 3 Appearance view of the present application; Figure 4 Plan view of the present application; Figure 5Structure diagram of part of the present application Figure 1 ; Figure 6 Structure diagram of part of the present application Figure 2 ; Figure 7 Structure diagram of part of the present application Figure 3 ; Figure 8 Front view of the present application Figure 7 ; Figure 9 Top view of the present application Figure 7 ; Figure 10 Structure diagram of the present application Figure 11 Setting mode diagram of the present application Figure 12 Setting mode diagram of the present application Figure 13 Setting mode diagram of the present application

[0020] In the figure: 11 - lower frame, 12 - frame connecting part, 13 - upper frame, 14 - stamping die frame, 141 - drop hole, 15 - shaft seat, 16 - sliding table, 17 - discharge port, 2 - punching post head, 21 - connecting plate, 22 - check plate, 23 - spring, 24 - connecting arm, 3 - stamping die, 41 - upper sprocket, 42 - lower sprocket, 43 - chain, 44 - driving gear, 45 - driven gear, 46 - rack, 461 - rack fixing seat, 462 - connecting seat, 47 - supporting table, 471 - extension plate, 472 - positioning table, 48 - guide groove, 481 - lifting section, 482 - transition section, 483 - descending section, 49 - interference piece, 5 - hydraulic cylinder, 61 - sliding rail one, 62 - sliding block one, 63 - sliding rail two, 64 - sliding block two, 7 - heat exchange plate. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] For the convenience of description, the coordinate system is defined as Figure 1As shown, the left and right directions are horizontal, the front and back directions are vertical, and the up and down directions are vertical.

[0023] like Figures 1 to 10 As shown, a heat exchanger plate punching device for plate heat exchanger production includes a punching stand, a punching head 2 and a driving mechanism for driving the punching head 2 to move up and down are provided on the punching stand. The driving mechanism and the punching head 2 are connected by a connecting plate 21. A corresponding stamping die 3 is provided on the punching stand and below the punching head 2.

[0024] Specifically, in this embodiment, the punching stand consists of a lower stand 11 and an upper stand 13, which are connected by a stand connecting part 12. The driving mechanism and the punching head 2 are located on the upper stand 13, and the stamping die 3 is located on the lower stand 11. The punching head 2 and the corresponding die hole of the stamping die 3 are aligned vertically.

[0025] Specifically, in this embodiment, a stamping die table 14 is provided on the top of the lower frame 11, and the stamping die 3 is fixed to the top of the stamping die table 14.

[0026] Specifically, in this embodiment, the driving mechanism is a hydraulic cylinder 5, which is fixed to the upper frame 13 by fasteners (such as bolts). Specifically, the punching head 2 is fixed to the bottom surface of the connecting plate 21 by fasteners, and the hydraulic cylinder 5 is connected to the top surface of the connecting plate 21 by fasteners.

[0027] like Figures 5 to 7 As shown, an upper sprocket 41 and a lower sprocket 42 are rotatably mounted on the punching stand. The upper sprocket 41 and the lower sprocket 42 are vertically distributed and connected by a chain 43. A connecting arm 24 extending towards the chain 43 is provided on the connecting plate 21. The connecting arm 24 is fixedly connected to a corresponding outer link within the chain 43. It should be noted that the outer link fixedly connected to the connecting arm 24 is located in the vertically extending link section of the entire chain, ensuring that while the driving arm of the hydraulic cylinder 5 moves the connecting plate 21 and the punching head 2 up and down, the connecting plate 21 can drive the chain 43 to rotate around the upper sprocket 41 and the lower sprocket 42 via the connecting arm 24.

[0028] like Figure 6 , Figure 7 and Figure 10As shown, the lower sprocket 42 is coaxially fixed with the driving gear 44, and the lower sprocket 42 drives the driving gear 44 to rotate at an equal angular velocity. A rack 46 is arranged on the punching rack and can slide forward and backward. Specifically, the rack 46 is located on the upper surface of the lower rack 11, and the rack 46 is in transmission cooperation with the driving gear 44 through the driven gear 45. The rack 46 is driven by the driven gear 45 to translate while the driving gear 44 rotates, and the translation speed of the rack 46 is the same as the linear speed of the driving gear 44 when rotating. One side of the rack 46 is provided with a supporting table 47 which can slide up and down, and the supporting table 47 is provided with a guide groove 48 which extends integrally forward and backward. The guide groove 48 sequentially includes a lifting section 481, a transition section 482 and a descending section 483 from back to front. The lifting section 481 is located below the descending section 483. An interference part is fixed on the punching die table 14 above the lower rack 11 and in sliding cooperation with the guide groove 48. Specifically, the interference part 49 is fixed on the punching die table 14 above the lower rack 11, and the interference part 49 is fixed relative to the punching die table 14 and located in the guide groove 48. When the interference part 49 is located in the lifting section 481, the top surface of the supporting table 47 is located above the top surface of the punching die 3 (as shown in Figure 7 ). When the interference part 49 is located in the descending section 483, the top surface of the supporting table 47 is located below the top surface of the punching die 3 (as shown in Figure 6 ). Therefore, when the rack 46 moves forward, the interference part 49 moves to the lifting section 481 relative to the guide groove 48, and the supporting table 47 moves upward under the interference of the interference part 49. At this time, the supporting table 47 moves to the front side of the punching die 3 and is located outside the punching area. When the rack 46 moves backward, the interference part 49 moves to the descending section 483 relative to the guide groove 48, and the supporting table 47 moves downward under the interference of the interference part 49. At this time, the supporting table 47 moves to the inside of the punching die 3 and is located directly below the punching die 3.

[0029] It should be noted that in the whole transmission process of the chain 43, the sprocket (the upper sprocket 41 and the lower sprocket 42), the gear (the driving gear 44 and the driven gear 45) and the rack 46, the supporting table 47 moves backward when the connecting plate 21 and the punching stud 2 move downward, and the supporting table 47 moves forward when the connecting plate 21 and the punching stud 2 move upward. Specifically, it can be adjusted by adaptive design, such as adjusting the number of driven gears 45 or replacing the connection point (such as the outer link of the front side part or the outer link of the rear side part of the chain 43) of the connecting arm 24 and the chain 43, which can adjust the transmission direction, and the specific implementation is to realize the above-mentioned movement.

[0030] Specifically, in the embodiment, Figure 6 and Figure 7As shown, the interference piece 49 adopts a metal piece in U-shaped structure, the middle section of the interference piece 49 is located in the guide groove 48, and the two end arms of the interference piece 49 are fixed on the stamping die table 14.

[0031] In particular, in the present embodiment, the lower part of the supporting table 47 is provided with an extension plate 471, and the guide groove 48 is arranged on the extension plate 471.

[0032] In the present embodiment, the upper sprocket 41, the lower sprocket 42 and the driven gear 45 are respectively connected with the punching table through the shaft seat 15, and the shaft seat 15 is fixed on the table connecting part 12. The rotating connection between the sprocket, the gear and the shaft seat is a conventional technology, and the specific connection mode will not be described here.

[0033] In the present embodiment, as shown in Figure 8 The rack 46 is arranged on the upper surface of the stamping die table 14, the upper surface of the stamping die table 14 is fixed with a slide rail one 61, the slide rail one 61 is slidably connected with a slide block one 62, the slide block one 62 is fixed with a rack fixing seat 461, and the rack 46 is fixed on the rack fixing seat 461.

[0034] In the present embodiment, as shown in Figure 9 The connecting seat 462 is fixed on one side of the rack fixing seat 461, the connecting seat 462 is provided with a slide rail two 63 extending upward and downward, the slide rail two 63 is slidably connected with a slide block two 64, and the supporting table 47 is fixed on the slide block two 64.

[0035] Working principle: Before punching, the driving arm of the hydraulic cylinder 5 is in the retracted state, the punching stud 2 and the connecting plate 21 are away from the stamping die 3, and the supporting table 47 is located outside the punching area.

[0036] When punching the heat exchange plate 7, the heat exchange plate 7 is placed on top of the support platform 47. After it is positioned, the drive arm of the hydraulic cylinder 5 extends, driving the connecting plate 21 and the punching head 2 to move downwards for punching. During the downward movement of the connecting plate 21, the support platform 47 moves backwards (i.e., enters the punching area) through the transmission of the chain 43, sprockets (upper sprocket 41, lower sprocket 42), gears (drive gear 44, driven gear 45), and rack 46. During the backward movement of the support platform 47, the interference member 49 moves from the lifting section. 481 passes through the transition section 482 and the descending section 483 in sequence. When the interference member 49 passes through the transition section 482, the support platform 47 moves downward. Since the top surface of the support platform 47 will transition from above the top surface of the stamping die 3 to below the top surface of the stamping die 3 during the entire process of the interference member 49 passing through the transition section 482, the heat exchange plate 7 placed on the support platform 47 will fall onto the stamping die 3. As the driving arm of the hydraulic cylinder 5 continues to drive the punching head 2 to move downward, the punching head 2 completes the punching of the heat exchange plate 7.

[0037] After punching is completed, the drive arm of the hydraulic cylinder 5 retracts, causing the connecting plate 21 and the punching head 2 to move upward away from the stamping die 3. During the upward movement of the connecting plate 21, the transmission is achieved through the chain 43, sprockets (upper sprocket 41, lower sprocket 42), gears (drive gear 44, driven gear 45), and rack 46, causing the support platform 47 to move forward (i.e., away from the punching area). During the forward movement of the support platform 47, the interference member 49 passes through the transition section 482 and the lifting section 481 sequentially from the descending section 483. When the interference member 49 passes through the transition section 482, the support platform 47 moves upward. During the movement of the interference member 49 through the transition section 482, the top surface of the support platform 47 will transition from below the top surface of the stamping die 3 to above the top surface of the stamping die 3. Therefore, the heat exchange plate 7 that has been punched on the stamping die 3 will be transferred back to the support platform 47. At the same time, after the support platform 47 moves forward, it will move the heat exchange plate 7 to the outside of the punching area, so that the operator can take out the heat exchange plate that has been punched. At the same time, the heat exchange plate 7 is moved to the outside of the punching area, avoiding the operator from taking out and putting in the heat exchange plate in the punching area, thus increasing the safety of the punching operation.

[0038] Furthermore, such as Figure 13 As shown, to facilitate quick positioning of the heat exchange plates on the support 47, a positioning platform 472 is provided on the support 47. After placing the heat exchange plates centered on the support 47, the rear side of the heat exchange plates should abut against the positioning platform 472. The function of the positioning platform 472 is to quickly and accurately position the front and rear of the punching hole.

[0039] It should be noted that the heat exchange plate 7 is in front and back position on the punch die 3, according to the reverse calculation can be obtained its accurate positioning, when looking for its positioning, can first manually adjust the drive arm of the hydraulic cylinder 5 stretching, make the punch stud 2 close to the punch die 3 but not into the die hole of the punch die 3, punch stud 2 and punch die 3 between a certain space artificial put a heat exchange plate on the punch die 3, at the same time make the support table 47 move to the lower of the punch die 3. When positioning, a heat exchange plate is accurately placed on the punch die 3 by artificial, make its need to be punched position and the die hole of the punch die 3 corresponding accurate, then manually control the drive arm of the hydraulic cylinder 5 contraction, at this time the support table 47 rises until the heat exchange plate is lifted, the heat exchange plate is transferred to the support table 47, at this time the heat exchange plate on the support table 47 is the position of the heat exchange plate which need to be accurately positioned, can mark the position of the heat exchange plate, then the positioning table 472 is adaptively fixed on the support table 47. In the subsequent automatic punching process, only need to position the heat exchange plate to the support table 47 can accurately position the heat exchange plate punching. The above-mentioned accurate positioning position finding is used for the early machine debugging, and does not belong to the actual use process of the punching device.

[0040] Further, as shown in Figure 12 , the punch die table 14 is provided with a drop hole 141, the drop hole 141 is vertically corresponding with the die hole in the punch die 3, the lower frame 11 is further provided with an inclined sliding table 16, the sliding table 16 is located directly below the drop hole 141, and the sliding table 16 is inclined from the back upper side to the front lower side, the front side of the lower frame 11 is provided with a discharge port 17 corresponding to the sliding table 16. In this way, the waste produced after punching by the punch stud 2 will fall through the drop hole 141 of the punch die 3 on the sliding table 16, and finally slide to the discharge port 17 under the action of gravity, and then be discharged to the outside of the device through the discharge port 17.

[0041] Further, as shown in Figure 11 , the punch stud 2 is provided with a check plate 22 on the outside, the check plate 22 is transitionally connected with the connecting plate 21 through a spring 23, and the bottom surface height of the check plate 22 is lower than the bottom surface height of the punch stud 2 when the spring 23 is in a natural stretching state. The function of the check plate 22 is to prevent the punch stud 2 from being stuck with the heat exchange plate after punching the heat exchange plate, during the process of moving downward and punching, the check plate 22 first contacts the heat exchange plate and presses the heat exchange plate tightly through the elastic force of the spring 23, and then completes the punching; after the punching is completed, the punch stud 2 moves upward and demolds, after the punch stud 2 completely separates from the heat exchange plate, the check plate 22 separates from the heat exchange plate, so as to ensure that the punch stud 2 can smoothly demold from the hole of the heat exchange plate.

[0042] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims with respect to the figures of the patent document.

Claims

1. A heat exchange sheet punching device for plate heat exchanger production, comprising a punching rack, a punching post head (2) is arranged on the punching rack, and a driving mechanism for driving the punching post head (2) to move up and down is arranged on the punching rack, the driving mechanism and the punching post head (2) are connected through transition fit connection of a connecting plate (21), and a corresponding punching die (3) is arranged on the punching rack and below the punching post head (2), characterized in that: The punching bench is provided with an upper sprocket (41) and a lower sprocket (42) which are vertically arranged, and the upper sprocket (41) and the lower sprocket (42) are connected by a chain (43). The connecting plate (21) is provided with a connecting arm (24) extending to the chain (43), and the connecting arm (24) is fixedly connected with a corresponding outer link in the chain (43). The lower sprocket (42) is coaxially fixed with a driving gear (44), and the punching bench is provided with a rack (46) which can slide forward and backward. The rack (46) is in transmission cooperation with the driving gear (44) through a driven gear (45). ​ One side of the rack (46) is provided with a supporting table (47) which can slide up and down. The supporting table (47) is provided with a guide groove (48) which extends integrally front and back. The guide groove (48) sequentially includes a lifting section (481), a transition section (482) and a descending section (483) from back to front. The lifting section (481) is below the descending section (483). The punching bench is fixed with an interference part which is in sliding cooperation with the guide groove (48). The interference part (49) is in the lifting section (481), and the top surface of the supporting table (47) is above the top surface of the stamping die (3). The interference part (49) is in the descending section (483), and the top surface of the supporting table (47) is below the top surface of the stamping die (3).

2. The punching device for heat exchange sheet for plate heat exchanger production according to claim 1, characterized in that: The punching bench includes a lower bench (11) and an upper bench (13). The lower bench (11) and the upper bench (13) are transitionally connected through a bench connecting part (12). The driving mechanism and the punching stud (2) are located on the upper bench (13), and the stamping die (3) is located on the lower bench (11). The punching stud (2) is vertically aligned with the die hole of the stamping die (3).

3. The punching device for heat exchange sheet for plate heat exchanger production according to claim 2, characterized in that: The top of the lower bench (11) is provided with a stamping die table (14), and the stamping die (3) is fixed on the top of the stamping die table (14).

4. The punching device for heat exchange sheet for plate heat exchanger production according to claim 2, characterized in that: The driving mechanism is a hydraulic cylinder (5) which is fixed on the upper bench (13) through a fastener.

5. The punching device for heat exchange sheet for plate heat exchanger production according to claim 3, characterized in that: The interference part (49) is a metal part in U-shaped structure. The middle section of the interference part (49) is in the guide groove (48), and the two end arms of the interference part (49) are fixed on the stamping die table (14).

6. The punching device for heat exchange sheet for plate heat exchanger production according to claim 3, characterized in that: The rack (46) is specifically arranged on the upper surface of the stamping die table (14). The upper surface of the stamping die table (14) is fixed with a sliding rail one (61). The sliding rail one (61) is slidingly matched with a sliding block one (62). The sliding block one (62) is fixed with a rack fixing seat (461), and the rack (46) is fixed on the rack fixing seat (461).

7. The punching device for heat exchange sheet for plate heat exchanger production according to claim 6, characterized in that: One side of the rack fixing seat (461) is fixed with a connecting seat (462). The connecting seat (462) is provided with a sliding rail two (63) which extends up and down. The sliding rail two (63) is slidingly matched with a sliding block two (64), and the supporting table (47) is fixed on the sliding block two (64).

8. The punching device for heat exchange sheet for plate heat exchanger production according to claim 1, characterized in that: The supporting table (47) is provided with a positioning table (472).

9. The punching device for heat exchange sheet for plate heat exchanger production according to claim 2, characterized in that: The punch die base (14) is provided with a through hole (141) vertically corresponding to a die hole in the punch die (3), and the lower frame (11) is further provided with an obliquely arranged sliding table (16) located directly below the through hole (141) and obliquely arranged from the rear upper side to the front lower side, and the front side of the lower frame (11) is provided with a discharge port (17) corresponding to the sliding table (16).

10. The punching device for heat exchange sheet for plate heat exchanger production according to claim 1, characterized in that: The outer side of the punch stud (2) is provided with a check plate (22) transitionally connected with the connecting plate (21) through a spring (23), and the bottom surface height of the check plate (22) is lower than the bottom surface height of the punch stud (2) when the spring (23) is in a natural extension state.

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