A cutting device and cutting method for tractor parts production

Abstract

The application discloses a cutting device and method for tractor part production, and relates to the technical field of exhaust muffler processing, which comprises a base, a laser cutting main body and a pipe clamping and feeding assembly, and further comprises a first fixing seat, the inside of the first fixing seat being provided with an inner support pipe, a material collecting mechanism, an interconnecting pipe, a fixed-point correction and cooling integrated mechanism, etc.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of exhaust muffler processing, in particular to a cutting device and method for tractor part production. BACKGROUND

[0002] The perforated muffler is an essential part of the exhaust system of a tractor, and laser drilling is required during the production of the perforated muffler.

[0003] When the existing laser cutting device drills holes in the pipe, it is difficult to quickly cool the hole position due to the large number of holes, which leads to the problem of thermal deformation of the perforated muffler. Moreover, the small deformation generated during the drilling process is difficult to correct in time, leading to the problem of high difficulty in correcting the perforated muffler after cooling. SUMMARY

[0004] The purpose of the present application is to provide a cutting device and method for tractor part production, to solve the problem of thermal deformation of the perforated muffler due to the large number of holes in the pipe during drilling, which makes it difficult to quickly cool the hole position, and the small deformation generated during the drilling process is difficult to correct in time, leading to the problem of high difficulty in correcting the perforated muffler after cooling.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a cutting device for tractor part production, comprising a base, a laser cutting main body and a pipe clamping and feeding assembly, further comprising:

[0006] A first fixed seat is installed on the top of the base, and an inner support pipe is provided inside the first fixed seat;

[0007] A material collecting mechanism comprising a through slot provided on the top of the inner support pipe and two baffles fixed inside the through slot;

[0008] An interconnected pipe is installed inside the inner support pipe, both baffles are fixed on the outer wall of the interconnected pipe, one end of the interconnected pipe is connected with a suction pipe, a plurality of air holes are provided on the top of the interconnected pipe along its length direction, and the outer diameter of both ends of the interconnected pipe is smaller than that of the middle part, facilitating the falling of cutting waste;

[0009] A fixed-point correction and cooling integrated mechanism comprising two limiting plates slidingly connected between the two baffles, a grid plate installed at the bottom of the two limiting plates, a displacement assembly for driving the limiting plates to move, and a linkage assembly for controlling the opening and closing of the air holes.

[0010] Further, the displacement assembly comprises a first screw rod rotatably connected inside the inner support pipe and a first motor installed at one end of the inner support pipe;

[0011] The output end of the first motor is fixedly connected with one end of the first screw rod.

[0012] Both of the limiting plates are threadedly connected outside the first screw rod.

[0013] Further, the linkage assembly comprises a driven rod arranged inside the air hole and a closed cover arranged outside the driven rod.

[0014] The top end of the driven rod is in a semispherical structure, and the bottom end of the driven rod is fixedly connected with the inner wall of the bottom of the closed cover.

[0015] First springs are mounted on both sides of the bottom of the closed cover, and the top end of each first spring is fixedly connected with the inner wall of the top of the interconnecting pipe.

[0016] Further, the other end of the inner support pipe is provided with a waste discharge cover, a telescopic rod is arranged between the waste discharge cover and the outer wall of the interconnecting pipe, a second spring is arranged outside the telescopic rod, one end of the second spring is fixedly connected with the outer wall of the waste discharge cover, and the other end of the second spring is fixedly connected with the outer wall of the interconnecting pipe.

[0017] Further, a second fixing seat is mounted on one side of the top of the base, and the first fixing seat is located between the second fixing seat and the pipe clamping and conveying assembly.

[0018] Further, a driving mechanism is arranged between the first fixing seat and the second fixing seat.

[0019] The driving mechanism comprises a second screw rod rotatably connected between the first fixing seat and the second fixing seat, and a second motor mounted on the outer wall of the second fixing seat, the output end of the second motor is fixedly connected with one end of the second screw rod, and the outer walls of both sides of one end of the inner support pipe are fixedly connected with sliding blocks, and one of the sliding blocks is threadedly connected outside the second screw rod.

[0020] A guide rod is further fixedly connected between the first fixing seat and the second fixing seat, and the other sliding block is slidingly sleeved outside the guide rod.

[0021] Further, a waste discharge mechanism is further arranged inside the inner support pipe, and the waste discharge mechanism comprises a push plate slidingly connected with the inner wall of the bottom of the inner support pipe and two fixing rods fixedly connected with the outer wall of one side of the second fixing seat.

[0022] Both of the fixing rods extend to the inside of the inner support pipe and are fixedly connected with the outer wall of the push plate.

[0023] A jacking rod is fixedly connected with the outer wall of the side of the push plate close to the waste discharge cover.

[0024] Further, a waste discharge channel is mounted on the outer wall of one side of the first fixing seat, and the waste discharge channel is arranged at the bottom of the inner support pipe.

[0025] The exhaust pipe channel is installed between the exhaust channel and the pipe clamping and feeding assembly.

[0026] A cutting method for tractor part production, which adopts the cutting device for tractor part production, comprises the following steps:

[0027] S1, the pipe clamping and feeding assembly is used to convey the pipe to be processed to the outside of the inner support pipe, and the laser cutting main body is used to sequentially perforate along the length direction of the pipe;

[0028] S2, the two limiting plates are driven to follow the perforation progress of the laser cutting main body, so that the two limiting plates are moved to the two sides of the just-perforated position, and the driven rod is driven downward by the grid plate, so that the perforated position is individually communicated with the air holes at the bottom of the grid plate, air is sucked through the air suction pipe, so that the external gas quickly passes through the perforated position, and the perforated position is quickly cooled and cooled;

[0029] S3, the pipe clamping mechanism is used to drive the pipe to rotate in sections, and the laser cutting main body is used to perforate along the length direction to obtain a multi-hole sound attenuation pipe, and the multi-hole sound attenuation pipe is cut to separate the multi-hole sound attenuation pipe from the pipe to be cut;

[0030] S4, the inner support pipe is driven to move rightward by the driving mechanism, and after the multi-hole sound attenuation pipe loses the support of the inner support pipe, the multi-hole sound attenuation pipe is discharged through the exhaust pipe channel, and the fixed push plate guides the waste falling into the inner support pipe to the inside of the exhaust channel.

[0031] Compared with the prior art, the cutting device and method for tractor part production have the following beneficial effects: by controlling the opening and closing of the air holes, when the airflow passes through the perforated position, the heat at the perforated position is quickly taken away, the perforated position is cooled and corrected in place, the problem that the perforated position is difficult to correct after cooling and hardening is avoided, and the waste generated by laser perforation is moved to the two ends of the inner support pipe during the movement of the limiting plate along the inner wall of the baffle and the top of the interconnected pipe, so that the waste generated by perforation is easily discharged. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0033] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0034] Figure 2 Structure diagram of the waste discharge channel and the pipe discharge channel of the application;

[0035] Figure 3 Structure diagram of the outer part of the inner support pipe of the application;

[0036] Figure 4 Structure diagram of the inner part of the inner support pipe of the application;

[0037] Figure 5 Structure diagram of the inner part of the interconnecting pipe of the application;

[0038] Figure 6 Structure diagram of the limiting plate, the grid plate and the first screw rod of the application;

[0039] Figure 7 Structure diagram of the linkage assembly of the application;

[0040] Figure 8 Structure diagram of the waste discharge mechanism of the application.

[0041] Explanation of reference signs:

[0042] 1, base; 2, laser cutting main body; 3, pipe clamping and feeding assembly; 4, first fixed seat; 5, inner support pipe; 6, through slot; 7, baffle; 8, interconnecting pipe; 9, air extraction pipe; 10, air hole; 11, limiting plate; 12, grid plate; 13, first screw rod; 14, first motor; 15, closed cover; 16, first spring; 17, waste discharge cover; 18, telescopic rod; 19, second fixed seat; 20, second screw rod; 21, second motor; 22, sliding block; 23, guide rod; 24, push plate; 25, fixed rod; 26, jacking rod; 27, waste discharge channel; 28, pipe discharge channel; 29, driven rod. DETAILED DESCRIPTION

[0043] In order to make the skilled in the art better understand the technical solutions of the application, the application will be further described in detail below with reference to the drawings.

[0044] Example 1: please refer to Figures 1-8 A cutting device for producing tractor parts, the base 1, the laser cutting main body 2 and the pipe clamping and feeding assembly 3, the pipe clamping and feeding assembly 3 is prior art, used to drive the pipe to move and rotate, further comprising:

[0045] The first fixed seat 4 is installed on the top of the base 1, and the inner support pipe 5 is arranged in the first fixed seat 4; the material collecting mechanism comprises the through slot 6 arranged on the top of the inner support pipe 5 and the two baffles 7 fixed in the through slot 6;

[0046] When the laser cutting main body 2 performs the laser perforating process on the pipe outside the inner support pipe 5 along the pipe length direction, the waste produced by the perforating enters between the two baffles 7.

[0047] The interconnecting pipe 8 is installed inside the inner support pipe 5, the two baffles 7 are fixed on the outer wall of the interconnecting pipe 8, one end of the interconnecting pipe 8 is connected with the suction pipe 9, the suction pipe 9 is a hose, the input end of the suction pipe 9 is connected with the suction fan, and a plurality of air holes 10 are arranged on the top of the interconnecting pipe 8 along the length direction thereof, the arrangement of the plurality of air holes 10 is matched with the positions of the perforations on the pipe, that is, the air holes 10 are located directly below the positions of the perforations on the pipe, and the outer diameters of the two ends of the interconnecting pipe 8 are smaller than the outer diameter of the middle part, so as to facilitate the falling of the cutting waste;

[0048] The air inside the interconnecting pipe 8 is sucked through the suction pipe 9, and the air outside enters the interconnecting pipe 8 through one of the air holes 10 and the perforation directly above it.

[0049] The fixed-point correcting and cooling integrated mechanism includes two limiting plates 11 slidably connected between the two baffles 7, a grid plate 12 installed at the bottom of the two limiting plates 11, a displacement assembly for driving the limiting plates 11 to move, and a linkage assembly for controlling the opening and closing of the air holes 10, the displacement assembly includes a first lead screw 13 rotatably connected inside the inner support pipe 5 and a first motor 14 installed at one end of the inner support pipe 5; the output end of the first motor 14 is fixedly connected with one end of the first lead screw 13; the top of the limiting plate 11 is the same as the internal curvature of the pipe, and the two limiting plates 11 are threadedly connected outside the first lead screw 13, the linkage assembly includes a driven rod 29 arranged inside the air hole 10 and a closure cover 15 arranged outside the driven rod 29; the top end of the driven rod 29 is a hemispherical structure, the bottom end of the driven rod 29 is fixedly connected with the inner wall at the bottom of the closure cover 15; the first spring 16 is installed at the bottom of the closure cover 15, and the top end of the first spring 16 is fixedly connected with the inner wall at the top of the interconnecting pipe 8;

[0050] When the laser cutting body 2 cuts a hole from right to left, when the laser cutting body 2 cuts a hole, the laser cutting body 2 continues to move to the left, at this time, the first motor 14 is controlled to drive the first lead screw 13 to rotate forward, and the two limiting plates 11 are driven to move to the left synchronously, and the grid plate 12 is driven to move to the left along the top of the interconnected pipe 8 synchronously, so that the two limiting plates 11 move to the two sides of the pipe just cut by the hole, in the process, the grid plate 12 drives the driven rod 29 below the hole cutting position to move downward, and the closure cover 15 moves downward synchronously, so that the driven rod 29 and the closure cover 15 are both removed from the closure of the air hole 10, so that the air hole 10 is opened, and the external air enters the inside of the interconnected pipe 8 through the hole cutting position and the air hole 10 position, and is sucked away by the suction pipe 9. When the airflow passes through the hole cutting position, the heat at the hole cutting position is quickly taken away, realizing the spot cooling of the hole cutting position. In the process of moving the limiting plate 11, the hole cutting position is easily deformed due to high temperature, so timely correction of the hole cutting position is realized, avoiding the problem that the hole cutting position is difficult to correct after cooling and hardening. In the process of moving the limiting plate 11 along the inner wall of the baffle 7 and the top of the interconnected pipe 8, the waste generated by laser cutting can be moved to the direction of the two ends of the inner support pipe 5, facilitating the discharge of the waste generated by cutting.

[0051] By controlling the first motor 14 to drive the first lead screw 13 to reverse, the limiting plate 11 can be driven to move to the right.

[0052] When the grid plate 12 passes the driven rod 29, the closure cover 15 and the driven rod 29 are reset by the rebound force of the first spring 16, and the closure effect of the air hole 10 is reformed.

[0053] One side of the top of the base 1 is provided with a second fixed seat 19, the first fixed seat 4 is located between the second fixed seat 19 and the pipe clamping and conveying assembly 3, and a driving mechanism is arranged between the first fixed seat 4 and the second fixed seat 19; the driving mechanism comprises a second lead screw 20 rotatably connected between the first fixed seat 4 and the second fixed seat 19 and a second motor 21 mounted on the outer wall of the second fixed seat 19, the output end of the second motor 21 is fixedly connected with one end of the second lead screw 20, and the outer walls on both sides of one end of the inner support pipe 5 are fixedly connected with sliding blocks 22, one of the sliding blocks 22 is threadedly connected with the outside of the second lead screw 20; the first fixed seat 4 and the second fixed seat 19 are also fixedly connected with a guide rod 23, and the other sliding block 22 is slidably sleeved on the outside of the guide rod 23.

[0054] After the multi-hole sound attenuation pipe is processed, the second motor 21 is controlled to drive the second lead screw 20 to rotate forward, the sliding block 22 is driven to move to the right, and the inner support pipe 5 is driven to move to the right, so that the support of the multi-hole sound attenuation pipe is removed.

[0055] After the porous sound attenuation pipe is discharged, the second motor 21 is controlled to drive the second lead screw 20 to reverse, the sliding block 22 is driven to move leftwards, and the inner support pipe 5 is driven to move leftwards to reset.

[0056] The other end of the inner support pipe 5 is provided with a waste discharge cover 17, a telescopic rod 18 is arranged between the waste discharge cover 17 and the outer wall of the interconnection pipe 8, the telescopic rod 18 is externally sleeved with a second spring, one end of the second spring is fixedly connected with the outer wall of the waste discharge cover 17, the other end of the second spring is fixedly connected with the outer wall of the interconnection pipe 8, the inner support pipe 5 is further provided with a waste discharge mechanism, the waste discharge mechanism comprises a push plate 24 slidingly connected to the inner wall of the bottom of the inner support pipe 5 and two fixed rods 25 fixedly connected to one side of the outer wall of the second fixed seat 19; one end of each of the two fixed rods 25 extends into the inner support pipe 5 and is fixedly connected with the outer wall of the push plate 24; the outer wall of the side, close to the waste discharge cover 17, of the push plate 24 is fixedly connected with a top rod 26, the outer wall of one side of the first fixed seat 4 is provided with a waste discharge channel 27, the waste discharge channel 27 is arranged at the bottom of the inner support pipe 5; the waste discharge channel 27 and the pipe material clamping and conveying assembly 3 are provided with a pipe discharge channel 28;

[0057] When the inner support pipe 5 moves rightwards, the waste material falling into the inner support pipe 5 is gathered on the left side of the push plate 24, when the top rod 26 abuts against the waste discharge cover 17, the inner support pipe 5 is completely moved out of the inside of the porous sound attenuation pipe, after the porous sound attenuation pipe loses support, first falls into the pipe discharge channel 28, along with the continuous movement of the inner support pipe 5, the waste discharge cover 17 is pushed open, and the waste material in the inner support pipe 5 falls into the waste discharge channel 27 from the inside of the inner support pipe 5;

[0058] When the inner support pipe 5 moves leftwards, the waste discharge cover 17 is driven to reset by the rebounding force of the second spring.

[0059] Embodiment 2: please refer to Figures 1-8 A cutting method for tractor parts production, which adopts the above-mentioned cutting device for tractor parts production, comprising the following steps:

[0060] S1, the pipe material to be processed is conveyed to the outside of the inner support pipe 5 through the pipe material clamping and conveying assembly 3, and the laser cutting main body 2 is sequentially holed along the length direction of the pipe material;

[0061] S2, the two limiting plates 11 are driven to move to the two sides of the just holed position along with the holed progress of the laser cutting main body 2, and the driven rod 29 is driven to move downwards through the grid plate 12, so that the holed position is individually communicated with the air holes 10 at the bottom of the grid plate 12, the external gas is quickly drawn through the holed position through the air suction pipe 9, and the holed position is quickly cooled and cooled;

[0062] S3, drive the pipe material to rotate by the pipe material pinch feed mechanism, cooperate with the laser cutting main body 2 to open holes in the length direction to obtain a multi-hole sound attenuation pipe, and then cut the multi-hole sound attenuation pipe to separate the multi-hole sound attenuation pipe from the pipe to be cut;

[0063] S4, drive the inner support pipe 5 to move to the right by the driving mechanism, and the multi-hole sound attenuation pipe loses the support of the inner support pipe 5 and is discharged through the pipe channel 28, and the fixed push plate 24 guides the waste falling inside the inner support pipe 5 to the waste discharge channel 27.

[0064] Working principle: when in use, the pipe material to be processed is conveyed to the outside of the inner support pipe 5 by the pipe material pinch feed assembly 3, and one end of the pipe material abuts against the outer wall of the waste discharge channel 27, and the laser cutting main body 2 is controlled to open holes in the pipe material from right to left, when the laser cutting main body 2 opens a hole, the laser cutting main body 2 continues to move to the left, at this time, the first motor 14 is controlled to drive the first lead screw 13 to rotate forward, driving the two limit plates 11 to move to the left synchronously, and the grid plate 12 moves to the left along the top of the interconnected pipe 8, so that the two limit plates 11 move to the left of the position where the hole is opened, in this process, the grid plate 12 drives the driven rod 29 below the hole opening position to move downward, and the closure cover 15 moves downward synchronously, and the driven rod 29 and the closure cover 15 are both removed from the closure of the air hole 10, so that the air hole 10 is opened, and through the suction effect of the air suction pipe 9, the external air enters the inside of the interconnected pipe 8 through the hole opening position and the air hole 10 position, and is sucked away by the air suction pipe 9, and the airflow through the hole opening position quickly removes the heat of the hole opening position, realizing the point cooling of the hole opening position, and in the process of moving the limit plate 11, the limit plate 11 will pass through the hole opening position, and the hole opening position is easy to deform due to high temperature, so that the hole opening position can be corrected in time, avoiding the problem that the hole opening position is difficult to correct after cooling and hardening, and in the process of moving the limit plate 11 along the inner wall of the baffle 7 and the top of the interconnected pipe 8, the waste generated by laser hole opening can be moved to the direction of both ends of the inner support pipe 5, facilitating the discharge of the waste generated by hole opening and falling on the inner wall at the bottom of the inner support pipe 5, and so on.

[0065] It should be noted that the device structure and the drawings of the present application mainly describe the principle of the present application, and the setting of the power mechanism, power supply system and control system of the device is not completely described in the technical principle of the design principle, and the specific of the power mechanism, power supply system and control system can be clearly known on the premise that the above-mentioned technical personnel understands the principle of the application, the control mode of the application file is automatically controlled by the controller, and the control circuit of the controller can be realized by simple programming of the technical personnel in the field; the above only describes some exemplary embodiments of the present application by way of illustration, without doubt, for ordinary technical personnel in the art, the described embodiments can be modified in various ways without deviating from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present application.

Claims

1. A cutting device for tractor parts production, comprising a base (1), a laser cutting body (2) and a pipe clamping assembly (3), characterized in that, Also include: The first fixed seat (4) is installed at the top of the base (1), and the inside of the first fixed seat (4) is provided with an inner support pipe (5); The material receiving mechanism comprises a through slot (6) formed at the top of the inner support pipe (5) and two baffles (7) fixed in the through slot (6); The interconnection pipe (8) is installed in the inner support pipe (5), the two baffles (7) are fixed on the outer wall of the interconnection pipe (8), one end of the interconnection pipe (8) is connected with the exhaust pipe (9), a plurality of air holes (10) are formed on the top of the interconnection pipe (8) along the length direction, the arrangement of the plurality of air holes (10) is matched with the position of the hole on the pipe, and the air hole (10) is located directly below the hole position of the pipe; The fixed-point correction and cooling integrated mechanism comprises two limiting plates (11) slidably connected between the two baffles (7), a grid plate (12) installed at the bottom of the two limiting plates (11), a displacement assembly for driving the limiting plate (11) to move, and a linkage assembly for controlling the opening and closing of the air hole (10); The displacement assembly comprises a first screw rod (13) rotatably connected in the inner support pipe (5) and a first motor (14) installed at one end of the inner support pipe (5); the output end of the first motor (14) is fixedly connected with one end of the first screw rod (13), the top of the limiting plate (11) is the same as the internal curvature of the pipe, and the two limiting plates (11) are threadedly connected outside the first screw rod (13); The linkage assembly comprises a driven rod (29) arranged in the air hole (10) and a closed cover (15) arranged outside the driven rod (29); the top end of the driven rod (29) is a hemispherical structure, the bottom end of the driven rod (29) is fixedly connected with the inner wall at the bottom of the closed cover (15); the first spring (16) is installed on both sides of the bottom of the closed cover (15), and the top end of the first spring (16) is fixedly connected with the inner wall at the top of the interconnection pipe (8).

2. The cutting apparatus for tractor parts production as claimed in claim 1, wherein The other end of the inner support pipe (5) is provided with a waste discharge cover (17), the outer wall between the waste discharge cover (17) and the interconnection pipe (8) is provided with a telescopic rod (18), the outer portion of the telescopic rod (18) is provided with a second spring, one end of the second spring is fixedly connected with the outer wall of the waste discharge cover (17), and the other end of the second spring is fixedly connected with the outer wall of the interconnection pipe (8).

3. A cutting apparatus for tractor parts production as claimed in claim 2, wherein One side of the top of the base (1) is provided with a second fixed seat (19), and the first fixed seat (4) is located between the second fixed seat (19) and the pipe material pinch roll assembly (3).

4. A cutting apparatus for tractor parts production as claimed in claim 3, wherein The first fixed seat (4) and the second fixed seat (19) are provided with a driving mechanism; The driving mechanism comprises a second screw rod (20) rotatably connected between the first fixed seat (4) and the second fixed seat (19) and a second motor (21) installed on the outer wall of the second fixed seat (19), the output end of the second motor (21) is fixedly connected with one end of the second screw rod (20), the outer walls on both sides of one end of the inner support pipe (5) are fixedly connected with a sliding block (22), and one of the sliding blocks (22) is threadedly connected outside the second screw rod (20). The first fixed seat (4) and the second fixed seat (19) are further fixedly connected with a guide rod (23), and the other sliding block (22) is slidingly sleeved on the outside of the guide rod (23).

5. A cutting apparatus for tractor parts production as claimed in claim 4, wherein, The inside of the inner supporting pipe (5) is further provided with a waste discharge mechanism, the waste discharge mechanism comprising a push plate (24) slidingly connected to the inner wall of the bottom of the inner supporting pipe (5) and two fixed rods (25) fixedly connected to the outer wall of one side of the second fixed seat (19); One end of each of the two fixed rods (25) extends to the inside of the inner supporting pipe (5) and is fixedly connected to the outer wall of the push plate (24); The push plate (24) is fixedly connected with a top rod (26) on the outer wall of the side close to the waste discharge cover (17).

6. A cutting apparatus for tractor parts production as claimed in claim 5, wherein The outer wall of one side of the first fixed seat (4) is provided with a waste discharge channel (27), and the waste discharge channel (27) is arranged at the bottom of the inner supporting pipe (5); The waste discharge channel (27) and the pipe material clamping and conveying assembly (3) are provided with a pipe discharging channel (28).

7. A cutting method for tractor parts production using the cutting apparatus for tractor parts production according to claim 6, characterized by, The method comprises the following steps: S1, the pipe material to be processed is conveyed to the outside of the inner supporting pipe (5) through the pipe material clamping and conveying assembly (3), and the laser cutting main body (2) is sequentially perforated along the length direction of the pipe material; S2, the two limiting plates (11) are driven to move to the two sides of the just-perforated position along with the perforation progress of the laser cutting main body (2), and the driven rod (29) is driven to move downward through the grid plate (12), so that the perforated position is individually communicated with the air holes (10) at the bottom of the grid plate (12), air is sucked through the air suction pipe (9), the external gas quickly passes through the perforated position, and the perforated position is quickly cooled and cooled; S3, the pipe material is driven to rotate in sections through the pipe material clamping and conveying mechanism, and is perforated along the penetrating length direction by cooperating with the laser cutting main body (2), so that a perforated sound-absorbing pipe is obtained, the perforated sound-absorbing pipe is ring-cut, and the perforated sound-absorbing pipe is separated from the pipe to be cut; S4, the inner supporting pipe (5) is driven to move rightwards through the driving mechanism, the perforated sound-absorbing pipe loses the support of the inner supporting pipe (5), is discharged through the pipe discharging channel (28), and the fixedly arranged push plate (24) guides the waste falling into the inside of the inner supporting pipe (5) to the inside of the waste discharge channel (27).

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