Corrugated pipe laser cutting clamp

Abstract

The utility model relates to the technical field of corrugated pipe machining, and discloses a corrugated pipe laser cutting clamp which comprises a fixing pipe used for being sleeved with a corrugated pipe in a sliding mode, a clamping part grabbed by a three-jaw chuck is coaxially arranged on one side of the fixing pipe, a positioning part is coaxially arranged between the clamping part and the fixing pipe, and the positioning part and the clamping part are fixedly connected. The positioning part is coaxially and fixedly sleeved with a limiting ring, a part of the to-be-cut workpiece is limited between the limiting ring and the positioning part, the positioning part is further provided with an abutting assembly used for abutting the to-be-cut workpiece against the positioning part, and a kidney-shaped hole is formed in the fixing pipe and communicated with an inner cavity in the axial direction of the fixing pipe. An air pipe connected to an external air extractor is coaxially inserted into the inner cavity of the side, away from the clamping part, of the fixing pipe, and the air pipe communicates with the kidney-shaped hole. The corrugated pipe cutting device has the effect of improving the corrugated pipe cutting precision.

Description

Technical Field

[0001] This application relates to the technical field of bellows processing, and particularly to a laser cutting fixture for bellows. Background Art

[0002] As a key component in the automotive exhaust aftertreatment system, the bellows utilizes its unique airtightness to contribute to the emission of automotive exhaust. At the same time, it can absorb the vibration of the exhaust system, thereby preventing excessive stress caused by thermal deformation and providing a more comfortable riding experience. And the bellows also plays an active role in exhaust gas treatment and noise elimination.

[0003] In the prior art, the cutting of bellows is usually carried out manually or mechanically with a tool. However, when cutting the bellows in the automotive engine exhaust aftertreatment system by a rotating tool, saw blade, etc., it is difficult to achieve the sawing accuracy of the bellows. If the cutting accuracy is not high, it will lead to loose fitting between the bellows and other components in the exhaust aftertreatment system, reducing the sealing performance of the system. This may cause exhaust gas leakage, affecting the environmental protection performance of exhaust gas emission, and even causing the vehicle to fail the emission test.

[0004] However, during the process of laser cutting the bellows, the inner surface of the bellows may be splashed due to laser cutting, and the splashes may adhere to the surface of the bellows, resulting in an increase in the surface roughness of the bellows, thus affecting the accuracy of the bellows and further affecting its performance in the exhaust aftertreatment system. Summary of the Utility Model

[0005] In order to improve the cutting accuracy of the bellows, this application provides a laser cutting fixture for bellows.

[0006] The laser cutting fixture for bellows provided by this application adopts the following technical solutions:

[0007] A laser cutting fixture for bellows includes a fixed tube for slidably sleeving the bellows. One side of the fixed tube is coaxially provided with a clamping portion grasped by a three-jaw chuck. A positioning portion is coaxially arranged between the clamping portion and the fixed tube. The positioning portion is fixedly connected to the clamping portion but rotatably engaged with the fixed tube. A limiting ring is coaxially and fixedly sleeved on the positioning portion. A part of the workpiece to be cut is limited between the limiting ring and the positioning portion. And a pressing assembly for pressing the workpiece to be cut against the positioning portion is further arranged on the positioning portion. A waist-shaped hole is axially and communicatively opened in the inner cavity of the fixed tube along its own axis. And an air duct connected to an external air extraction device is coaxially inserted into the inner cavity on the side of the fixed tube away from the clamping portion, and the air duct is communicatively arranged with the waist-shaped hole.

[0008] By adopting the above technical solution, during the cutting process, the clamping part is clamped by the rotating three-jaw chuck on the cutting equipment, and the corrugated pipe workpiece is slidably mounted on the fixed pipe, and is accurately positioned and stabilized by the limit ring and the clamping assembly, thereby realizing a one-time clamping of the workpiece to be cut. The fixed pipe is in a fixed position, while the laser cutter moves along the axial direction parallel to the fixed pipe, and cuts both ends of the corrugated pipe in the clamped and positioned workpiece to be cut, and during the cutting process, the air duct removes the spatter generated by the cutting through an external exhaust device. The one-time clamping and two-time cutting method improves the coaxiality of the corrugated pipe cutting, and the air duct promptly removes the spatter generated during the cutting process, thereby preventing the spatter from adhering to the surface of the corrugated pipe, improving the surface quality of the corrugated pipe after cutting, and further improving the accuracy of the corrugated pipe cutting.

[0009] Optionally, a through groove is opened on the side wall of the limiting ring along its own axial direction, and the clamping assembly includes a clamping block arranged on the positioning portion and rotating perpendicular to the axial direction of the positioning portion, and a driving member driving the clamping block to rotate, and the end of the clamping block facing the through groove is plugged into and cooperated with the through groove during the rotation process, and the part of the workpiece to be cut that is limited in the limiting ring is clamped to the positioning portion by the clamping block.

[0010] By adopting the above technical solution, when it is necessary to press against the corrugated tube, the pressing block is driven to rotate by the driving member so that its end can be inserted into the through groove and pressed against the corrugated tube, thereby achieving clamping and positioning of the workpiece to be cut.

[0011] Optionally, the driving member includes a cam rotatably arranged on the positioning portion and a rotating rod driving the cam to rotate, the axial direction of the cam is parallel to the axial direction of the clamping block, and the cam is arranged to abut against the end of the clamping block away from the through groove, and when the rotating rod drives the cam to rotate to the highest point, the part of the workpiece to be cut that is limited in the limiting ring is locked by the clamping block against the positioning portion.

[0012] By adopting the above technical solution, when the rotating rod drives the cam to rotate to the highest point, the direction of the force acting on the clamping block is opposite to the rotation direction of the cam. At this time, the contact point between the clamping block and the cam slides, causing the part of the workpiece to be cut that is limited in the limiting ring to be locked by the clamping block against the positioning part, thereby clamping the part of the workpiece to be cut against the positioning part, thereby improving the stability of the workpiece to be cut during the cutting process.

[0013] Optionally, the rotating rod slides through the positioning portion along the axial direction of the cam, and the rotating rod and the positioning portion are rotatably engaged. A through hole is provided at the axial portion of the cam corresponding to the rotating rod. The rotating rod slides through the through hole and slidably engages with the through hole. A key slot is provided on the side wall of the rotating rod parallel to its own axial direction, and a limit key slidably engaged with the key slot is provided on the inner side wall of the through hole.

[0014] By adopting the above technical solution, the rotating rod is detachably connected to the cam and the positioning part, which facilitates the replacement of the worn cam and rotating rod. Moreover, the sliding fit between the limiting key and the key groove not only improves the sliding freedom of the rotating rod but also enhances its stability during rotation.

[0015] Optionally, a handle for facilitating the rotation of the rotating rod is provided at one end of the rotating rod extending out of the positioning part.

[0016] By adopting the above technical solution, the setting of the handle facilitates the operator to rotate the rotating rod more easily and conveniently.

[0017] Optionally, a plug-in part is coaxially provided on one side of the fixed pipe facing the positioning part, a plug-in slot is provided on the positioning part corresponding to the plug-in part, the plug-in part and the plug-in slot are in sliding fit, and a guiding surface is provided at the end of the plug-in part facing the plug-in slot.

[0018] By adopting the above technical solution, the fixed pipe can be easily connected or separated from the positioning part through the cooperation of the plug-in part and the plug-in slot. Due to the setting of the guiding surface, it is convenient for the docking accuracy during the plug-in process and improves the coaxiality of the fixture.

[0019] Optionally, an elastic metal snap ring is coaxially and fixedly provided on the inner peripheral side wall of the plug-in slot, a snap ring groove is provided on the outer peripheral side wall of the plug-in part corresponding to the elastic metal snap ring, and when the fixed pipe is coaxially positioned and connected to the positioning part, the elastic metal snap ring is located in the snap ring groove.

[0020] By adopting the above technical solution, when the fixed pipe is coaxially positioned and connected to the positioning part, the elastic metal snap ring will automatically snap into the snap ring groove, thereby forming a stable snap connection, and a clear sound will be generated when the elastic metal snap ring snaps into the snap ring groove to remind the operator that the fixed pipe and the positioning part have been assembled in place.

[0021] Optionally, a sealing ring is sleeved on the outer peripheral side wall of the end of the air duct facing the fixed pipe, and the sealing ring is in contact with the inner side wall of the fixed pipe.

[0022] By adopting the above technical solution, the sealing ring seals between the air duct and the fixed pipe, thereby reducing the possibility of gas leakage during the air extraction process, improving the suction strength of the air duct for flying objects, and thus improving the surface quality of the corrugated pipe after cutting.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. During the cutting process, the clamping part is clamped by the rotating three-jaw chuck on the cutting device. The corrugated pipe workpiece is slidably sleeved on the fixed pipe and accurately positioned and stabilized through the limiting ring and the pressing component, so as to realize the primary clamping of the workpiece to be cut. The fixed pipe is in a stationary positioning state, while the laser cutter moves along the axial direction parallel to the fixed pipe and performs a primary cut on both ends of the corrugated pipe in the workpiece to be cut that is clamped and positioned. At the same time during the cutting process, the air duct sucks away the flying debris generated by cutting through an external air extraction device. The method of primary clamping and secondary cutting improves the coaxiality of corrugated pipe cutting, and the air duct timely sucks away the flying debris generated during the cutting process, thus preventing the flying debris from adhering to the surface of the corrugated pipe, improving the surface quality of the corrugated pipe after cutting, and further improving the cutting accuracy of the corrugated pipe;

[0025] 2. When it is necessary to press tightly against the corrugated pipe, the driving part is used to drive the pressing block to rotate, so that its end can be inserted into the through groove and press tightly against the corrugated pipe, realizing the clamping and positioning of the workpiece to be cut;

[0026] 3. When the rotating rod drives the cam to rotate to the highest point, the acting force direction on the pressing block is opposite to the rotation direction of the cam. At this time, the contact point between the pressing block and the cam generates sliding, resulting in the state where the part of the workpiece to be cut limited within the limiting ring is pressed tightly against the positioning part by the pressing block being locked, thereby pressing part of the workpiece to be cut against the positioning part and improving the stability of the workpiece to be cut during the cutting process. Description of the Drawings

[0027] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present application.

[0028] Figure 2 is the schematic diagram of the workpiece to be cut and the corrugated pipe finished product.

[0029] Figure 3 is the overall structural sectional view of Embodiment 1 of the present application.

[0030] Figure 4 is the exploded schematic diagram showing the connection relationship between the cam and the rotating rod in Embodiment 1 of the present application.

[0031] Figure 5 is the overall structural schematic diagram of Embodiment 2 of the present application.

[0032] Figure 6 is the sectional view showing the connection relationship between the insertion part and the insertion slot in Embodiment 2 of the present application.

[0033] Description of the Reference Numerals:

[0034] 01. Workpiece to be cut; 02. Finished bellows; 1. Fixed tube; 11. Insertion part; 111. Clamping ring groove; 12. Waist-shaped hole; 2. Clamping part; 3. Positioning part; 31. Insertion slot; 32. Limiting ring; 321. Through slot; 4. Tightening component; 41. Tightening block; 42. Driving part; 421. Cam; 4211. Through hole; 422. Rotating rod; 4221. Keyway; 5. Air duct; 6. Limiting key; 7. Handle; 8. Elastic metal snap ring; 9. Sealing ring. Detailed implementation mode

[0035] The following is a further detailed description of this application in conjunction with the attached Figures 1-6 drawings.

[0036] The embodiment of this application discloses a laser cutting fixture for bellows.

[0037] Embodiment 1

[0038] Referring to Figures 1 to 3 , a laser cutting fixture for bellows includes a fixed tube 1 which is used for slidably sleeving the workpiece 01 to be cut. A clamping part 2 is coaxially arranged on one side of the fixed tube 1. A positioning part 3 is coaxially arranged between the clamping part 2 and the fixed tube 1. An insertion part 11 is coaxially integrally formed on the side of the fixed tube 1 facing the positioning part 3. An insertion slot 31 is correspondingly opened on the positioning part 3 for the insertion part 11. The insertion part 11 and the insertion slot 31 are in sliding fit, and a guiding surface is opened at the end of the insertion part 11 facing the insertion slot 31. The clamping part 2 and the positioning part 3 are coaxially fixedly connected. A limiting ring 32 is coaxially integrally formed on the positioning part 3 to limit the workpiece 01 to be cut. In addition, a tightening component 4 is also provided on the positioning part 3 for pressing the workpiece against the positioning part 3 to ensure stability during the cutting process. A waist-shaped hole 12 is axially communicated with the inner cavity of the fixed tube 1. An air duct 5 is coaxially inserted into the inner cavity on the side of the fixed tube 1 away from the clamping part 2. The air duct 5 is connected to an external air extraction device and is communicated with the waist-shaped hole 12.

[0039] Referring to Figures 1 to 3 , during the cutting process, the clamping part 2 is clamped by the rotating three-jaw chuck on the cutting equipment. The workpiece 01 to be cut is slidably sleeved on the fixed tube 1 and is accurately positioned and fixed by the limiting ring 32 and the tightening component 4. The laser cutter moves along the axis of the fixed tube 1 to perform precise circumferential cutting on the workpiece 01 to be cut. At the same time, the air duct 5 timely extracts the generated spatter through the external air extraction device.

[0040] Referring to Figure 1 and Figure 3A through slot 321 is formed on the side wall of the limiting ring 32 along its own axial direction. The pressing assembly 4 includes a pressing block 41 and a driving member 42. The pressing block 41 is perpendicular to the axial direction of the positioning portion 3 and is rotatably arranged on the positioning portion 3. The end of the pressing block 41 facing the through slot 321 is plugged and matched with the through slot 321 during the rotation process, and the part of the workpiece 01 to be cut that is limited in the limiting ring 32 is pressed against the positioning portion 3 by the pressing block 41.

[0041] Reference Figure 3 and Figure 4 The driving member 42 includes a cam 421 and a rotating rod 422. The axial direction of the cam 421 is parallel to the axial direction of the clamping block 41, and the cam 421 is in contact with the end of the clamping block 41 away from the through groove 321. The rotating rod 422 slides through the positioning portion 3 along the axial direction of the cam 421, and the rotating rod 422 and the positioning portion 3 are rotatably matched. A through hole 4211 is opened at the axial part of the cam 421 corresponding to the rotating rod 422. The rotating rod 422 slides through the through hole 4211 and slides with the through hole 4211. A key groove 4221 is opened on the side wall of the rotating rod 422 parallel to its own axial direction, and a limit key 6 that slides with the key groove 4221 is fixedly arranged on the inner side wall of the through hole 4211.

[0042] Reference Figure 3 and Figure 4 When the rotating rod 422 drives the cam 421 to rotate to the highest point, the direction of the force acting on the clamping block 41 is opposite to the rotation direction of the cam 421. At this time, the contact point between the clamping block 41 and the cam 421 slides, causing the part of the workpiece 01 to be cut that is limited in the limiting ring 32 to be locked by the clamping block 41 against the positioning portion 3, thereby clamping the part of the workpiece 01 to be cut against the positioning portion 3, thereby improving the stability of the workpiece 01 to be cut during the cutting process.

[0043] Reference Figure 1 , Figure 3 and Figure 4 In order to facilitate the operator to rotate the rotating rod 422, a handle 7 is installed on one end of the rotating rod 422 extending out of the positioning part 3.

[0044] The implementation principle of the corrugated tube laser cutting fixture of the embodiment of the present application is as follows: before laser cutting the workpiece 01 to be cut, firstly, the clamping part 2 is clamped by the rotating three-jaw chuck on the cutting device, and then the workpiece 01 to be cut is slidably sleeved on the fixed tube 1 which is positioned and immovable, until the workpiece 01 to be cut is slid to the point where the protrusion on the surface thereof contacts the side wall of the limiting ring 32, at which time the workpiece 01 to be cut is in a suitable cutting position, and part of it is inserted between the positioning part 3 and the limiting ring 32;

[0045] Next, rotating the handle 7 drives the rotating rod 422 to rotate. When the rotating rod 422 drives the cam 421 to rotate to the highest point, the acting force direction on the pressing block 41 is opposite to the rotating direction of the cam 421. At this time, the contact point between the pressing block 41 and the cam 421 generates sliding, resulting in the state where the part of the workpiece 01 to be cut limited within the limiting ring 32 is pressed tightly against the positioning part 3 by the pressing block 41, thereby realizing the primary clamping of the workpiece 01 to be cut.

[0046] When the fixed pipe 1 is in a fixed positioning state, the laser cutter moves along the axial direction parallel to the fixed pipe 1, and performs a primary cut on both ends of the corrugated pipe in the workpiece 01 to be cut and clamped and positioned. During the cutting process of the workpiece 01 to be cut, the rotating three-jaw chuck clamps the clamping part 2, thereby driving the workpiece 01 to be cut and the fixed pipe 1 to rotate coaxially, realizing the circumferential cutting of the workpiece 01 to be cut by the laser cutter. And during the cutting process, the air duct 5 sucks away the flying debris generated by cutting through an external air extraction device.

[0047] Embodiment 2

[0048] Refer to Figure 5 and Figure 6 In this embodiment, the difference from Embodiment 1 is that an elastic metal snap ring 8 is coaxially and fixedly arranged on the inner peripheral side wall of the insertion slot 31, and a snap ring groove 111 is provided on the outer peripheral side wall of the insertion part 11 corresponding to the elastic metal snap ring 8, and the elastic metal snap ring 8 and the snap ring groove 111 are in insertion fit. And a sealing ring 9 is fixedly sleeved on the outer peripheral side wall of the end of the air duct 5 facing the fixed pipe 1, and the sealing ring 9 is in contact with the inner side wall of the fixed pipe 1.

[0049] The implementation principle of Embodiment 2 is that when the fixed pipe 1 and the positioning part 3 are coaxially positioned and connected, the elastic metal snap ring 8 will automatically snap into the snap ring groove 111, thereby forming a stable snap connection, and the elastic metal snap ring 8 will produce a clear sound when snapping into the snap ring groove 111, which is used to remind the operator that the fixed pipe 1 and the positioning part 3 have been assembled in place. And the sealing ring 9 seals between the air duct 5 and the fixed pipe 1, thereby reducing the possibility of gas leakage during the air extraction process and further improving the suction intensity of the air duct 5 for the flying debris.

[0050] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A corrugated tube laser cutting fixture, characterized in that: The invention comprises a fixed tube (1) for slidingly sleeve-mounted bellows, a clamping part (2) grasped by a three-jaw chuck is coaxially arranged on one side of the fixed tube (1), a positioning part (3) is coaxially arranged between the clamping part (2) and the fixed tube (1), the positioning part (3) is fixedly connected to the clamping part (2) but is rotatably matched with the fixed tube (1), a limiting ring (32) is coaxially fixedly sleeved on the positioning part (3), and a part of the workpiece (01) to be cut is limited. Between the limiting ring (32) and the positioning portion (3), a pressing component (4) for pressing the workpiece (01) to be cut against the positioning portion (3) is also provided on the positioning portion (3); a waist hole (12) is provided on the fixing tube (1) along its own axial direction to communicate with the inner cavity; and a wind pipe (5) connected to an external air exhaust device is coaxially inserted into the inner cavity of the fixing tube (1) away from the clamping portion (2); and the wind pipe (5) is connected to the waist hole (12).

2. A corrugated tube laser cutting fixture according to claim 1, characterized in that: A through groove (321) is provided on the side wall of the limiting ring (32) along its own axial direction. The clamping assembly (4) comprises a clamping block (41) which is arranged on the positioning portion (3) to rotate perpendicularly to the axial direction of the positioning portion (3) and a driving member (42) for driving the clamping block (41) to rotate. The end of the clamping block (41) facing the through groove (321) is plugged into and matched with the through groove (321) during the rotation process. The part of the workpiece (01) to be cut which is limited in the limiting ring (32) is clamped against the positioning portion (3) by the clamping block (41).

3. The corrugated tube laser cutting fixture according to claim 2, characterized in that: The driving member (42) comprises a cam (421) rotatably arranged on the positioning portion (3) and a rotating rod (422) driving the cam (421) to rotate; the axial direction of the cam (421) is parallel to the axial direction of the pressing block (41); and the cam (421) is arranged to abut against the end of the pressing block (41) away from the through groove (321); when the rotating rod (422) drives the cam (421) to rotate to the highest point, the portion of the workpiece (01) to be cut that is limited in the limiting ring (32) is locked in a state where the pressing block (41) is pressed against the positioning portion (3).

4. The corrugated tube laser cutting fixture according to claim 3, characterized in that: The rotating rod (422) slides through the positioning portion (3) along the axial direction of the cam (421), and the rotating rod (422) and the positioning portion (3) are rotationally engaged. A through hole (4211) is provided at the axial position of the cam (421) corresponding to the rotating rod (422). The rotating rod (422) slides through the through hole (4211) and is slidingly engaged with the through hole (4211). A key groove (4221) is provided on the side wall of the rotating rod (422) parallel to its own axial direction, and a limit key (6) slidingly engaged with the key groove (4221) is provided on the inner side wall of the through hole (4211).

5. The corrugated tube laser cutting fixture according to claim 3, characterized in that: One end of the rotating rod (422) extending out of the positioning portion (3) is provided with a handle (7) for facilitating the rotation of the rotating rod (422).

6. The corrugated tube laser cutting fixture according to claim 1, characterized in that: A plug-in portion (11) is coaxially arranged on one side of the fixing tube (1) facing the positioning portion (3); a plug-in groove (31) is provided on the positioning portion (3) corresponding to the plug-in portion (11); the plug-in portion (11) and the plug-in groove (31) are slidably matched, and a guide surface is provided at the end of the plug-in portion (11) facing the plug-in groove (31).

7. The corrugated tube laser cutting fixture according to claim 6, characterized in that: An elastic metal snap ring (8) is coaxially fixedly arranged on the inner ring side wall of the plug-in groove (31), and a snap ring groove (111) is formed on the outer ring side wall of the plug-in portion (11) corresponding to the elastic metal snap ring (8). When the fixed tube (1) and the positioning portion (3) are coaxially positioned and connected, the elastic metal snap ring (8) is located in the snap ring groove (111).

8. The corrugated tube laser cutting fixture according to claim 1, characterized in that: A sealing ring (9) is sleeved on the outer peripheral side wall of the end portion of the air duct (5) facing the fixed tube (1), and the sealing ring (9) is arranged to abut against the inner side wall of the fixed tube (1).

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