Sawing structure for automobile sealing strip follow-up sawing machine

Abstract

The invention provides a saw cutting structure for an automobile sealing strip follow-up saw cutting machine, and relates to the technical field of circular saw cutting, the saw cutting structure comprises a saw cutting table, a saw cutting frame and a feeding seat, the saw cutting frame and the feeding seat are both mounted on the saw cutting table, the saw cutting structure further comprises a clamping assembly mounted on the feeding seat, when the feeding seat slides forwards, a sealing strip is clamped to assist in feeding, and when the feeding seat slides forwards, the clamping assembly is used for clamping the sealing strip. The feeding base slides backwards, clamping is relieved when the feeding base slides backwards, the two sets of fixing frames are symmetrically and fixedly installed on the sawing table, the freezing assembly is installed on the sawing table, and the liquid nitrogen barrel is installed on the sawing table and used for clamping and freezing the sealing strips through linkage of the fixing frames and the freezing assembly when the feeding base reciprocates. The saw cutting frame does arc-shaped motion and is linked with the feeding seat to synchronously and horizontally reciprocate, the purposes of automatic conveying and follow-up saw cutting are achieved by linking the clamping assembly, and meanwhile, the freezing assembly is used for freezing outer-layer rubber at the cutting position before the sealing strip is cut, so that the rubber is temporarily embrittled, and the cutting resistance is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of circular sawing, and in particular to a sawing structure used for a follow-up sawing machine for automobile sealing strips. Background Art

[0002] Automobile sealing strips are strip-shaped parts made of rubber or other materials installed on car doors, windows, trunks, etc. Their main function is to seal the gaps in the car body, prevent dust, rain, and noise from entering the car, and improve the sound insulation and heat preservation performance of the car doors. The materials, shapes, and specifications of the sealing strips used in different models and parts are different. Since most sealing strips are made of soft rubber, in order to improve their rigidity and plasticity, metal strips are clamped inside to form composite sealing strips. When cutting this kind of sealing strip, ordinary cutting is not applicable, and a sawing machine is required for sawing.

[0003] Traditional sawing machines are equipped with external feeding equipment. Although they can load materials automatically, they cannot achieve efficient follow-up sawing during the loading process. In addition, although traditional sawing machines can cut off the internal metal core, high temperatures are generated during the cutting process. On the one hand, the soft sealing strip will be melted and sticky, and on the other hand, the sealing strip will easily be entangled on the saw blade, affecting production efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the conventional sawing machine in the prior art that it is unable to achieve efficient follow-up sawing during the loading process, and the high temperature generated during the cutting process will, on the one hand, cause the soft sealing strip to melt and become sticky, and on the other hand, the sealing strip will easily become entangled on the saw blade, thereby affecting production efficiency.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a sawing structure for a follow-up sawing machine for automobile sealing strips, comprising a sawing table, a sawing frame and a feeding seat, wherein the sawing frame and the feeding seat are both mounted on the sawing table and a motor for driving the sawing frame to move in an elliptical path is mounted on the sawing table, and the sawing frame drives the feeding seat to synchronously perform horizontal reciprocating motion, and further comprising: A clamping assembly installed on the feeding seat, clamping the sealing strip to assist feeding when the feeding seat slides forward, and releasing the clamping when the feeding seat slides backward; Two sets of fixing frames symmetrically fixedly mounted on the sawing table; A freezing assembly installed on the sawing table clamps and freezes the sealing strip through the freezing assembly linked by the fixing frame when the feeding seat reciprocates; A liquid nitrogen barrel for storing liquid nitrogen is installed on the sawing table.

[0006] In at least some embodiments, a worm is rotatably installed on the back of the sawing table, two worm wheels meshing with the worm are rotatably installed on the back of the sawing table, two rocker arms are rotatably installed on the back of the sawing frame, one end of the rocker arm away from the sawing frame is fixedly connected to the shaft of the worm wheel, a driving pulley is fixedly sleeved on the shaft of the worm wheel, a driving bevel gear is rotatably installed at the front end of the sawing frame, one end of the shaft of the driving bevel gear penetrates through the rocker arm and is fixedly sleeved with a driven pulley, a transmission belt is sleeved between the driven pulley and the driving bevel gear, a transmission shaft is rotatably installed at the front end of the sawing frame, a driven bevel gear meshingly connected with the driving bevel gear is fixedly installed at one end of the transmission shaft, and a circular saw blade is fixedly installed at the other end of the transmission shaft.

[0007] In at least some embodiments, a slide rail is fixedly installed on the sawing table, the feeding seat is slidably installed on the slide rail, a plug rod movably inserted into the feeding seat is fixedly installed at the bottom of the sawing frame, a saw cut is formed at one end of the feeding seat, and the length of the slide rail is greater than twice the length of the feeding seat.

[0008] In at least some embodiments, the clamping assembly includes a guiding seat, a guiding column and a clamping cover plate. The guiding seat is fixedly installed on the sawing table, a guiding groove is formed in the guiding seat, the guiding column is slidably inserted into the guiding groove, the clamping cover plate is rotatably installed on the side of the feeding seat away from the saw cut, a connecting rod is integrally formed on the clamping cover plate, a sliding groove is formed in the connecting rod, and the connecting rod is slidably connected with the guiding column through the sliding groove.

[0009] In at least some embodiments, the guiding groove is generally oval and is divided into two pairs of straight portions and arc portions, and bending portions are provided in both arc portions of the guiding groove to ensure that the guiding column can be guided to the correct straight portion when moving in the arc portion.

[0010] In at least some embodiments, a lead screw is rotatably installed on the fixed frame, a transmission gear meshingly connected with the toothed plate is fixedly installed at the bottom end of the lead screw, and toothed plates are integrally formed on both sides of the feeding seat.

[0011] In at least some embodiments, the freezing assembly includes a supporting seat and a pressing cover. The supporting seat is located between the two fixed frames, the pressing cover is located directly above the supporting seat, a piston cylinder is fixedly installed at the top of the pressing cover, a piston rod with a piston is movably inserted into the piston cylinder, a driving plate is fixedly installed at the top of the piston rod, columns are provided at the four corners of the top of the pressing cover, a return spring is sleeved on the column, and both ends of the return spring are fixedly connected with the driving plate and the pressing cover respectively.

[0012] In at least some embodiments, semi-circular through holes are formed in both the middle of the supporting seat and the pressing cover. When the pressing cover presses the supporting seat, the two semi-circular through holes form a circular through hole for the sealing strip to pass through, and a plurality of communicating channels are formed in the inner walls of the through holes of the supporting seat and the pressing cover.

[0013] In at least some embodiments, the channels in the supporting seat and the gland are threaded. A current collecting ring covering the channels is fixedly installed at one end of each of the supporting seat and the gland, and the two current collecting rings are in communication with each other. The current collecting ring is fixedly connected to the piston cylinder in the tangential direction through a hard metal pipe, and a one-way valve for unidirectional flow towards the current collecting ring is installed on the hard metal pipe.

[0014] In at least some embodiments, the liquid nitrogen barrel is fixedly connected to the piston cylinder through a soft metal pipe. A pump for transporting liquid nitrogen is fixedly installed on the liquid nitrogen barrel, and a one-way valve for reverse flow towards the liquid nitrogen barrel is installed at the output end of the pump.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In the present invention, while the motor drives the sawing frame to perform an arc motion through a rocker, it also drives the circular saw blade to rotate. Through the insertion action of the insertion rod and the limiting action of the slide rail on the feeding seat, the feeding seat is driven to move horizontally back and forth synchronously, so that the circular saw blade is always directly above the sawing groove. At the same time, through the linkage clamping assembly, the feeding seat moves forward for feeding and moves backward for replenishing materials, achieving the purpose of automatic feeding and efficient follow-up sawing.

[0016] 2. In the present invention, the gland in the linkage refrigeration assembly presses down, and after the gland contacts the supporting seat, the piston in the piston cylinder is pressed down to input liquid nitrogen into the channel, so as to freeze the outer rubber at the cutting position (when the feeding seat replenishes materials) before the sealing strip is cut, making the rubber temporarily brittle, reducing the cutting resistance, and preventing the problems that the soft sealing strip melts and adheres due to the high temperature generated during cutting and the sealing strip is easily wound around the saw blade, thereby improving the production efficiency for the metal sandwich sealing strip. Brief Description of the Drawings

[0017] Figure 1 It is an overall three-dimensional schematic diagram of a sawing structure of a follow-up sawing machine for automotive sealing strips proposed by the present invention; Figure 2 It is a schematic diagram of the structure of the back of the sawing table in a sawing structure of a follow-up sawing machine for automotive sealing strips proposed by the present invention; Figure 3 It is a schematic diagram of the structure of the sawing frame in a sawing structure of a follow-up sawing machine for automotive sealing strips proposed by the present invention Figure 1 ; Figure 4 It is a schematic diagram of the structure of the sawing frame in a sawing structure of a follow-up sawing machine for automotive sealing strips proposed by the present invention Figure 2 ; Figure 5 It is a schematic diagram of the connection between the sawing frame and the feeding seat in a sawing structure of a follow-up sawing machine for automotive sealing strips proposed by the present invention; Figure 6The figure shows a schematic structural diagram of a clamping component in a sawing structure for a follow-up sawing machine of an automotive sealing strip according to the present invention; Figure 7 The figure shows a schematic connection diagram of a fixed frame and a freezing component in a sawing structure for a follow-up sawing machine of an automotive sealing strip according to the present invention; Figure 8 The figure shows a schematic structural diagram of a freezing component in a sawing structure for a follow-up sawing machine of an automotive sealing strip according to the present invention; Figure 9 The figure shows a schematic internal structure diagram of a supporting seat and a gland in a sawing structure for a follow-up sawing machine of an automotive sealing strip according to the present invention.

[0018] Legend: 1, sawing table; 101, worm; 102, worm wheel; 103, slide rail; 2, sawing frame; 201, rocker; 202, driving pulley; 203, driven pulley; 204, transmission belt; 205, driving bevel gear; 206, transmission shaft; 207, driven bevel gear; 208, circular saw blade; 209, insertion rod; 3, feeding seat; 301, toothed plate; 4, clamping component; 401, guiding seat; 402, guiding column; 403, clamping cover plate; 404, guiding groove; 405, connecting rod; 5, fixed frame; 501, lead screw; 502, transmission gear; 6, freezing component; 601, supporting seat; 602, gland; 603, piston cylinder; 604, piston rod; 605, driving plate; 606, column; 607, return spring; 608, channel; 609, current collecting ring; 7, liquid nitrogen tank. Detailed implementation manners

[0019] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0020] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.

[0021] Embodiment, according to Figures 1-9 , as Figure 1As shown, a sawing structure for a follow-up sawing machine for automobile sealing strips provided by an embodiment of the present invention includes a sawing table 1, a sawing frame 2 and a feeding seat 3, wherein the sawing frame 2 and the feeding seat 3 are both installed on the sawing table 1 and a motor for driving the sawing frame 2 to move in an elliptical path is installed on the sawing table 1, and the sawing frame 2 drives the feeding seat 3 to synchronously perform horizontal reciprocating motion, and also includes a clamping assembly 4 installed on the feeding seat 3, which clamps the sealing strip to assist feeding when the feeding seat 3 slides forward, and releases the clamping when the feeding seat 3 slides backward, two groups of fixed frames 5 symmetrically fixed on the sawing table 1, a freezing assembly 6 installed on the sawing table 1, and the sealing strip is clamped and frozen by the fixed frame 5 when the feeding seat 3 reciprocates, and a liquid nitrogen barrel 7 installed on the sawing table 1 for storing liquid nitrogen.

[0022] like Figures 1-4 As shown, a worm 101 is rotatably mounted on the back of the sawing table 1, and two worm wheels 102 meshing with the worm 101 are rotatably mounted on the back of the sawing table 1. Two rocking arms 201 are rotatably mounted on the back of the sawing frame 2. One end of the rocking arm 201 away from the sawing frame 2 is fixedly connected to the shaft of the worm wheel 102. A driving pulley 202 is fixedly sleeved on the shaft of the worm wheel 102. A driving bevel gear 205 is rotatably mounted on the front end of the sawing frame 2. One end of the shaft of the driving bevel gear 205 passes through the rocking arm 201 and is fixedly sleeved with a driven pulley 203. A transmission belt 204 is sleeved between the driven pulley 203 and the driving bevel gear 205. A transmission shaft 205 is rotatably mounted on the front end of the sawing frame 2. 6. A driven bevel gear 207 meshing with the active bevel gear 205 is fixedly mounted on one end of the transmission shaft 206, and a circular saw blade 208 is fixedly mounted on the other end of the transmission shaft 206. When in use, the motor drives the worm 101 to rotate, driving the worm wheels 102 on both sides to rotate synchronously, and the rocker 201 fixed on the shaft of the worm wheel 102 swings accordingly, driving the saw frame 2 to move along an elliptical path. A driving pulley 202 is provided on the shaft of the worm wheel 102, which drives the driven pulley 203 through the transmission belt 204, thereby driving the active bevel gear 205 to rotate, and the driven bevel gear 207 meshing with it drives the circular saw blade 208 to rotate at high speed through the transmission shaft 206. Figure 3 and Figure 5 As shown, a slide rail 103 is fixedly installed on the sawing table 1, and the feeding seat 3 is slidably installed on the slide rail 103. A plug rod 209 movably connected to the feeding seat 3 is fixedly installed at the bottom of the sawing frame 2. A sawing opening is opened at one end of the feeding seat 3. The length of the slide rail 103 is greater than twice the length of the feeding seat 3. When in use, the feeding seat 3 is slidably connected to the sawing table 1 through the slide rail 103, and the plug rod 209 at the bottom of the sawing frame 2 is inserted into the slot of the feeding seat 3, which converts the elliptical motion of the sawing frame 2 into a horizontal reciprocating motion of the feeding seat 3, so that the circular saw blade 208 is always directly above the sawing opening of the feeding seat 3 and will not deviate, thereby realizing efficient follow-up sawing during the feeding process.

[0023] likeFigure 6 As shown, the clamping assembly 4 includes a guide seat 401, a guide post 402, and a clamping cover plate 403. The guide seat 401 is fixedly installed on the sawing table 1. A guide groove 404 is formed on the guide seat 401. The guide post 402 is slidably inserted into the guide groove 404. The clamping cover plate 403 is rotatably installed on the side of the feeding seat 3 away from the sawing opening. A connecting rod 405 is integrally formed on the clamping cover plate 403. A chute is formed on the connecting rod 405. The connecting rod 405 is slidably connected to the guide post 402 through the chute. During use, when the feeding seat 3 moves forward, the guide post 402 slides along the upper straight part, driving the clamping cover plate 403 to press down through the connecting rod 405 to clamp the sealing strip; when the feeding seat 3 retracts, the guide post 402 slides along the lower straight part, driving the clamping cover plate 403 to tilt up to release the clamping. Generally, the feeding seat 3 moves forward for feeding and moves backward for replenishing materials, achieving the purpose of intermittent feeding for the sealing strip, realizing efficient follow-up sawing. And the length of the slide rail 103 is greater than twice the stroke of the feeding seat 3, avoiding movement interference and ensuring the continuity of the feeding and cutting actions. The guide groove 404 is overall elliptical and is divided into two pairs of straight parts and arc parts. Bending parts are provided on both arc parts of the guide groove 404 to ensure that the guide post 402 can be guided to the correct straight part when moving in the arc part. During use, since bending parts are provided on both arc parts of the guide groove 404 and the bending lengths are different, at the critical point of reciprocating motion, a pre-variable direction buffer is given to the guide post 402 to ensure that the guide post 402 can be guided to the correct straight part when moving in the arc part.

[0024] As Figure 7 and Figure 8As shown in the figure, a lead screw 501 is rotatably installed on the fixing bracket 5. A transmission gear 502 engaged with the toothed plate 301 is fixedly installed at the bottom end of the lead screw 501. Toothed plates 301 are integrally formed on both sides of the feeding base 3. The freezing assembly 6 includes a supporting base 601 and a pressing cover 602. The supporting base 601 is located between the two fixing brackets 5, and the pressing cover 602 is located directly above the supporting base 601. A piston cylinder 603 is fixedly installed on the top of the pressing cover 602. A piston rod 604 with a piston is movably inserted into the piston cylinder 603. A driving plate 605 is fixedly installed at the top of the piston rod 604 and the driving plate 605 is threadedly connected to the lead screw 501. Columns 606 are provided at the four corners of the top of the pressing cover 602. A return spring 607 is sleeved on the column 606 and the two ends of the return spring 607 are fixedly connected to the driving plate 605 and the pressing cover 602 respectively. During use, the feeding base 3 moves horizontally back and forth to drive the toothed plate 301 to move and drive the lead screw 501 to rotate. The rotation of the lead screw 501 drives the driving plate 605 to move up and down. Specifically, when the feeding base 3 moves backward, the driving plate 605 moves down and drives the pressing cover 602 to press on the supporting base 601, so as to achieve the purpose of covering the sawing position of the sealing strip. At this time, the feeding base 3 moves backward by half the distance of the slide rail 103 and then moves backward. The driving plate 605 continues to descend and drives the piston to move down through the piston rod 604, and the liquid nitrogen in the piston cylinder 603 is input into the confluence ring 609 to freeze the sawing position of the sealing strip, making the rubber temporarily brittle and reducing the cutting resistance. On the contrary, the liquid nitrogen in the liquid nitrogen barrel 7 is extracted.

[0025] As Figure 7 and Figure 9As shown in the figure, semi-circular through holes are provided in the middle of the support seat 601 and the gland 602. When the gland 602 presses against the support seat 601, the two semi-circular through holes form a circular through hole for the sealing strip to pass through. A plurality of communicating channels 608 are provided on the inner walls of the through holes of the support seat 601 and the gland 602. The channels 608 in the support seat 601 and the gland 602 are threaded. A manifold 609 covering the channel 608 is fixedly installed at one end of the support seat 601 and the gland 602, and the two manifolds 609 are communicated with each other. The manifold 609 is fixedly communicated with the piston cylinder 603 through a hard metal pipe in the tangential direction, and a one-way valve for one-way flow toward the manifold 609 is installed on the hard metal pipe. During use, liquid nitrogen is injected into the threaded channels 608 of the support seat 601 and the gland 602 through the one-way valve, and the surface of the sealing strip is frozen. The threaded channels 608 extend the flow path of the liquid nitrogen, increase the contact area with the sealing strip, and achieve rapid and uniform freezing, solidifying the cut area of the sealing strip to avoid burrs or deformation during cutting. The liquid nitrogen tank 7 is fixedly communicated with the piston cylinder 603 through a soft metal pipe. A pump for transporting liquid nitrogen is fixedly installed on the liquid nitrogen tank 7, and a one-way valve for reverse flow toward the liquid nitrogen tank 7 is installed at the output end of the pump. During use, when the driving plate 605 rises, the piston moves upward through the piston rod 604. At this time, the one-way valve opens and the pump operates, and the liquid nitrogen tank 7 replenishes liquid nitrogen to the piston cylinder 603 through the pump.

[0026] The above is only a preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A sawing structure for an automotive sealing strip follow-up sawing machine, comprising a sawing table (1), a sawing frame (2) and a feeding seat (3), characterized in that: The sawing frame (2) and the feeding base (3) are both installed on the sawing table (1), and a motor for driving the sawing frame (2) to move along an elliptical path is installed on the sawing table (1). At the same time, the sawing frame (2) drives the feeding base (3) to perform a synchronous horizontal reciprocating motion. It further includes: A clamping assembly (4) installed on the feeding base (3) that clamps the sealing strip to assist feeding when the feeding base (3) slides forward and releases the clamping when the feeding base (3) slides backward; Two groups of fixing frames (5) symmetrically and fixedly installed on the sawing table (1); A freezing assembly (6) installed on the sawing table (1) that, when the feeding base (3) reciprocates, drives the freezing assembly (6) through the fixing frame (5) to clamp and freeze the sealing strip; A liquid nitrogen bucket (7) installed on the sawing table (1) for storing liquid nitrogen.

2. The sawing structure of a follow-up sawing machine for automobile sealing strips according to claim 1, characterized in that: A worm (101) is rotatably installed on the back of the sawing table (1), and two worm wheels (102) meshing with the worm (101) are rotatably installed on the back of the sawing table (1). Two rocker arms (201) are rotatably installed on the back of the sawing frame (2). One end of the rocker arm (201) away from the sawing frame (2) is fixedly connected to the shaft of the worm wheel (102). A driving pulley (202) is fixedly sleeved on the shaft of the worm wheel (102). A driving bevel gear (205) is rotatably installed at the front end of the sawing frame (2). One end of the shaft of the driving bevel gear (205) penetrates through the rocker arm (201) and is fixedly sleeved with a driven pulley (203). A transmission belt (204) is sleeved between the driven pulley (203) and the driving bevel gear (205). A transmission shaft (206) is rotatably installed at the front end of the sawing frame (2). One end of the transmission shaft (206) is fixedly installed with a driven bevel gear (207) meshing with the driving bevel gear (205), and the other end of the transmission shaft (206) is fixedly installed with a circular saw blade (208).

3. The sawing structure of a follow-up sawing machine for automotive sealing strips according to claim 1, characterized in that: A slide rail (103) is fixedly installed on the sawing table (1). The feeding base (3) is slidably installed on the slide rail (103). A plug rod (209) that is movably inserted into the feeding base (3) is fixedly installed at the bottom of the sawing frame (2). A saw cut is provided at one end of the feeding base (3). The length of the slide rail (103) is greater than twice the length of the feeding base (3).

4. The sawing structure for a follow-up sawing machine of an automotive sealing strip according to claim 1, characterized in that: The clamping assembly (4) includes a guide seat (401), a guide post (402), and a clamping cover plate (403). The guide seat (401) is fixedly installed on the sawing table (1). A guide groove (404) is provided on the guide seat (401). The guide post (402) is slidably inserted into the guide groove (404). The clamping cover plate (403) is rotatably installed on the side of the feeding base (3) away from the saw cut. A connecting rod (405) is integrally formed on the clamping cover plate (403). A chute is provided on the connecting rod (405). The connecting rod (405) is slidably connected to the guide post (402) through the chute.

5. The sawing structure for a follow-up sawing machine of an automotive sealing strip according to claim 4, characterized in that: The guide groove (404) is elliptical in shape as a whole and is divided into two pairs of straight line portions and an arc portion. Both arc portions of the guide groove (404) are provided with a bend to ensure that the guide column (402) can be guided to the correct straight line portion when the arc portion moves.

6. The sawing structure for a follow-up sawing machine of an automotive sealing strip according to claim 1, characterized in that: A screw rod (501) is rotatably mounted on the fixed frame (5), a transmission gear (502) meshingly connected to a toothed plate (301) is fixedly mounted on the bottom end of the screw rod (501), and toothed plates (301) are integrally formed on both sides of the feed seat (3).

7. The sawing structure for an automotive sealing strip follow-up sawing machine according to claim 1, characterized in that: The freezing assembly (6) comprises a supporting seat (601) and a pressure cover (602), wherein the supporting seat (601) is located between the two fixing frames (5), and the pressure cover (602) is located directly above the supporting seat (601), a piston cylinder (603) is fixedly installed on the top of the pressure cover (602), a piston rod (604) with a piston is movably inserted in the piston cylinder (603), a driving plate (605) is fixedly installed on the top of the piston rod (604), and columns (606) are provided at the four corners of the top of the pressure cover (602), a return spring (607) is sleeved on the column (606), and the two ends of the return spring (607) are respectively fixedly connected to the driving plate (605) and the pressure cover (602).

8. The sawing structure for an automotive sealing strip follow-up sawing machine according to claim 7, characterized in that: The support seat (601) and the pressure cover (602) are both provided with a semicircular through hole in the middle. When the pressure cover (602) is pressed against the support seat (601), the two semicircular through holes form a circular through hole for the sealing strip to pass through. The inner walls of the through holes of the support seat (601) and the pressure cover (602) are both provided with a plurality of connecting channels (608).

9. The sawing structure for an automotive sealing strip servo sawing machine according to claim 8, wherein: The channel (608) in the support seat (601) and the pressure cover (602) is threaded, and one end of the support seat (601) and the pressure cover (602) is fixedly installed with a collector ring (609) covering the channel (608), and the two collector rings (609) are connected to each other. The collector ring (609) is fixedly connected to the piston cylinder (603) in a tangential direction through a hard metal tube, and a one-way valve for one-way flow toward the collector ring (609) is installed on the hard metal tube.

10. A sawing structure for a follow-up sawing machine of an automotive sealing strip, according to claim 9, characterized in that: The liquid nitrogen barrel (7) is fixedly connected to the piston cylinder (603) via a soft metal tube. A pump for conveying liquid nitrogen is fixedly mounted on the liquid nitrogen barrel (7), and a one-way valve for reverse flow toward the liquid nitrogen barrel (7) is mounted on the output end of the pump.

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