A flared locking die for an automobile exhaust system

Abstract

The application provides a flaring locking mold for an automobile exhaust system, which comprises a clamping mold for fixing a pipe and a flaring device arranged opposite to the clamping mold. The clamping mold comprises an upper mold plate and a lower mold plate, and the upper mold plate is provided with an upper groove on the side close to the lower mold plate, and the lower mold plate is provided with a lower groove on the side close to the upper mold plate. The flaring device comprises a top rod arranged on one side of the clamping mold and a flaring rod arranged on the side of the clamping mold away from the top rod. The top rod abuts against the pipe clamped by the clamping mold, and the flaring rod flares the pipe. The flaring rod is provided with a locking boss, the upper groove and the lower groove abut against each other to form a clamping cavity, and the clamping cavity is provided with a locking groove corresponding to the locking boss. The application improves the butt joint precision of the pipe, facilitates the subsequent welding process, improves the welding quality, disperses the stress of the welding position, reduces the possibility of cracking in the subsequent process, and avoids exhaust gas leakage.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of exhaust pipe production, and particularly relates to an automobile exhaust system flared locking die. BACKGROUND

[0002] The exhaust system is a key part of an automobile or other internal combustion engine equipment, and is usually composed of an exhaust manifold, a catalytic converter, a muffler, an exhaust tail pipe and the like. The above-mentioned multiple pipes have different diameters, and the traditional way is to expand the opening of the small-diameter pipe to the same thickness as the large-diameter pipe and then weld them. However, the above-mentioned installation method requires high docking precision and good welding technology. Otherwise, exhaust leakage problems are likely to occur, which can harm the driver and passengers, affect the working efficiency of the exhaust system, increase noise, and cause the engine power to decrease.

[0003] Therefore, the above-mentioned problems need to be solved. SUMMARY

[0004] The application aims to overcome the above-mentioned problems and provides an automobile exhaust system flared locking die, which improves the docking precision of the pipe, facilitates the subsequent welding process, improves the welding quality, disperses the stress on the pipe, reduces the possibility of subsequent cracking, and avoids exhaust leakage.

[0005] Technical scheme: In order to achieve the above-mentioned purpose, the application provides an automobile exhaust system flared locking die, which comprises a clamping die for fixing the pipe and a flaring device opposite to the clamping die. The clamping die comprises an upper die plate and a lower die plate, and the upper die plate is provided with an upper groove on the side close to the lower die plate, and the lower die plate is provided with a lower groove on the side close to the upper die plate. The flaring device comprises a top rod arranged on one side of the clamping die and a flaring rod arranged on the side of the clamping die away from the top rod. The top rod abuts against the pipe clamped by the clamping die, and the flaring rod flares the pipe. The flaring rod is provided with a locking boss, the upper groove and the lower groove abut to form a clamping cavity, and the clamping cavity is provided with a locking groove corresponding to the locking boss. During use of the application, the clamping die clamps the pipe between the upper groove and the lower groove, the top rod abuts against the pipe, and then the flaring rod extends towards the pipe to flare the pipe. At this time, the locking boss extrudes part of the pipe into the locking groove, so that the pipe forms a protrusion. The pipe is provided with a corresponding recess, and when the pipe is docked, the protrusion on the pipe corresponds to the recess of the large-diameter pipe, the pipe is inserted into the opening of the large-diameter pipe, the protrusion on the pipe and the recess of the large-diameter pipe form a lock, and then the pipe is welded. The application improves the docking precision of the pipe, facilitates the subsequent welding process, improves the welding quality, disperses the stress on the pipe, reduces the possibility of subsequent cracking, and avoids exhaust leakage.

[0006] Further, in the automobile exhaust system flaring locking die, the locking groove is spirally arranged around the inner wall of the clamping cavity. The flaring rod is provided with smooth multi-stage steps at one end close to the clamping die, the locking boss is spirally arranged around the multi-stage steps, and the locking boss and the locking groove are correspondingly arranged. The locking boss and the locking groove are spirally arranged, the protrusion formed after flaring is spirally arranged, the pipe is connected by spiral butt joint, the contact area of the butt joint pipe is increased, the stability of the butt joint pipe connection is improved, stress concentration after butt joint is avoided, and the possibility of cracking caused by subsequent vibration is reduced.

[0007] Further, in the automobile exhaust system flaring locking die, the clamping cavity is provided with a guide boss at one end close to the flaring rod, the guide boss is provided with a guide groove, and the guide groove guides the locking boss into the locking groove. The guide groove is trumpet-shaped, and during the flaring process, the locking boss first enters the trumpet-shaped guide groove and then enters the locking groove under the guidance of the guide groove to perform flaring processing, thereby improving the flaring precision and avoiding impact of the locking boss to cause damage to the die.

[0008] Further, in the automobile exhaust system flaring locking die, the locking boss gradually decreases towards the clamping die. The locking boss gradually decreases, the boss formed after flaring gradually increases, and the butt joint starts from the lower boss during butt joint, which can guide the coaxial butt joint of the pipe and improve the butt joint precision and the connection stability.

[0009] Further, in the automobile exhaust system flaring locking die, the flaring device is slidingly connected to the top surface of the bottom plate. The flaring rod is provided with a flaring driving device at the side away from the clamping die, the flaring driving device drives the flaring rod to move towards the clamping die, and the flaring rod flares the pipe. The ejector rod is provided with an ejector rod driving device at the side away from the clamping die, the ejector rod driving device drives the ejector rod to abut against the pipe. The flaring driving device and the ejector rod driving device are linear driving devices, which can accurately control the movement distance of the flaring rod and the ejector rod, and avoid damage to the die caused by overtravel during flaring.

[0010] Further, in the automobile exhaust system flaring locking die, the flaring device includes a first base and a second base, the first base is connected with a flange seat, the flaring rod shaft is movably connected to the flange seat, a spring is connected between the flaring rod and the flange seat, one end of the spring is connected to the flaring rod, and the other end of the spring is connected to the flange seat. The second base is connected with the ejector rod. The flaring rod shaft is movably connected to the flange seat, the flaring rod extends out during flaring, the locking boss enters the locking groove, the flaring rod rotates, and the spring rotates and twists. After flaring is completed, the flaring rod retracts, the locking boss exits the locking groove, the flaring rod reversely rotates, the spring resets, and the flaring rod returns to the initial position. The above arrangement can ensure that the flaring rod can return to the initial state after retraction, avoid displacement of the flaring rod, ensure that the locking boss cannot enter the locking groove, and ensure the stability of the die.

[0011] Further, the automobile exhaust system flaring locking mold, the first base is connected with the first lead screw, the first lead screw is drivenly connected with the flange base, the first lead screw is connected with the first motor, the first motor drives the first lead screw to rotate, the first lead screw is drivenly connected with the feeding device, and the feeding device is slidably connected with the first base. The second base is provided with a second lead screw, the second lead screw is drivenly connected with the ejector pin, the second lead screw is connected with the second motor, the second motor drives the second lead screw to rotate, the second lead screw is drivenly connected with the discharging device, and the discharging device is slidably connected with the second base. When feeding is needed, the first motor drives the first lead screw to rotate, the first lead screw drives the feeding device to move to the hopper, after the feeding device takes the pipe, the first lead screw drives the feeding device to move to the clamping mold, and flaring is carried out. After flaring, the second motor drives the second lead screw to rotate, the second lead screw drives the discharging device to move to the clamping mold, the discharging device takes the flared pipe, and the second motor reverses to drive the discharging device to the discharging hopper. Automatic feeding and automatic discharging are realized by setting the feeding device and the discharging device, flaring operation is automated, production efficiency is improved, and production cost is reduced.

[0012] Further, the automobile exhaust system flaring locking mold, the feeding device includes a first square plate drivenly connected with the first lead screw, the first square plate is connected with a feeding slide rail, the feeding slide rail is vertically arranged, the feeding slide rail is slidably connected with a first push plate, the first push plate is connected with a first bushing, the first bushing is slidably connected with a feeding rod, a first cylinder is connected to the side of the first push plate away from the feeding rod, and the cylinder shaft of the first cylinder penetrates the first push plate and the feeding rod and is drivingly connected. The lower side of the first push plate is provided with a second cylinder, the cylinder shaft of the second cylinder is vertically arranged, and the second cylinder is drivingly connected with the first push plate. When feeding is needed, the first motor drives the feeding device to move to the hopper, the second cylinder drives the first push plate to move downward along the feeding slide rail, then the first cylinder drives the feeding rod to extend out of the first bushing, the feeding rod extends into the through hole of the pipe, then the second cylinder drives the first push plate to move upward along the feeding slide rail, the first motor drives the feeding device to move to the clamping mold, the first cylinder drives the feeding rod to retract, and the pipe falls into the lower groove and waits for flaring. Feeding is realized by cooperation of the cylinder and the feeding rod, the structure is compact, easy to realize, and the failure rate is low.

[0013] Further, the automobile exhaust system flaring locking mold described above, the blanking device comprises a second square plate connected to the second lead screw, the second square plate is connected with a blanking slide rail, the blanking slide rail is vertically arranged, the blanking slide rail is slidingly connected with a second push plate, the second push plate is connected with a second bushing, the second bushing is slidingly connected with a blanking rod, the side of the second push plate away from the blanking rod is connected with a third air cylinder, and the cylinder shaft of the third air cylinder is drivingly connected through the second push plate and the blanking rod. The fourth air cylinder is arranged on the lower side of the second push plate, the cylinder shaft of the fourth air cylinder is vertically arranged, and the fourth air cylinder is drivingly connected with the second push plate. When blanking is needed, the second motor drives the blanking device to move to the clamping mold, the fourth air cylinder drives the second push plate to move downward along the blanking slide rail, then the third air cylinder drives the blanking rod to extend out of the second bushing, the blanking rod extends into the through hole of the flared pipe, then the fourth air cylinder drives the second push plate to move upward along the blanking slide rail, the second motor drives the blanking device to move to the blanking bin, the third air cylinder drives the blanking rod to retract, and the pipe falls into the blanking bin. The blanking is realized by cooperation of the air cylinder and the blanking rod, the structure is compact, easy to realize, and the failure rate is low.

[0014] Further, the automobile exhaust system flaring locking mold described above, the upper side of the upper mold plate is provided with a pressing air cylinder, the pressing air cylinder is drivingly connected with the upper mold plate, and the pressing air cylinder presses the upper mold plate against the top surface of the lower mold plate, so that the pipe is prevented from moving during flaring, the flaring quality is improved, and the number of waste products is reduced.

[0015] The above technical scheme can be seen that the automobile exhaust system flaring locking mold has the following beneficial effects: the automobile exhaust system flaring locking mold can improve the butt joint precision of the pipe, facilitate the subsequent welding process, improve the welding quality, and improve the stability of the butt joint pipe by setting the locking convex and the locking groove in a corresponding spiral shape, avoiding stress concentration at the welding position, and reducing the possibility of cracking caused by subsequent vibration. The automatic feeding and automatic blanking are realized by setting the feeding device and the blanking device, the flaring operation is automated, the production efficiency is improved, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the automobile exhaust system flaring locking mold.

[0017] Figure 2 It is a front view of the clamping mold and the pressing air cylinder.

[0018] Figure 3 It is a sectional view of the clamping mold.

[0019] Figure 4 It is a top view of the flaring device.

[0020] Figure 5 It is Figure 4A magnified view of a portion of the image;

[0021] Figure 6 This is a schematic diagram of the feeding device.

[0022] Figure 7 This is a schematic diagram of the feeding device.

[0023] In the diagram: 1. Clamping mold; 11. Upper template; 12. Lower template; 111. Upper groove; 121. Lower groove; 113. Clamping cavity; 1131. Guide boss; 1132. Guide groove; 13. Multi-stage step; 131. Locking boss; 114. Threaded groove; 115. Clamping cylinder; 2. Flaring device; 21. Push rod; 22. Flaring rod; 23. Flange seat; 3. Base plate; 4. Flaring drive device; 5. Push rod drive device; 6. First base; 61. First lead screw; 6 2. First motor; 63. Feeding device; 631. First square plate; 632. Feeding slide rail; 633. First bushing; 634. Feeding rod; 635. First cylinder; 636. Second cylinder; 637. First push plate; 7. Second base; 71. Second lead screw; 72. Second motor; 73. Unloading device; 731. Second square plate; 732. Unloading slide rail; 733. Second bushing; 734. Unloading rod; 735. Third cylinder; 736. Fourth cylinder; 737. Second push plate. Detailed Implementation

[0024] Example 1

[0025] like Figures 1-5 The illustrated automotive exhaust system flaring and locking mold includes a clamping mold 1 for fixing pipe fittings and a flaring device 2 disposed opposite to the clamping mold 1. The clamping mold 1 includes an upper template 11 and a lower template 12. The upper template 11 has an upper groove 111 on the side near the lower template 12, and the lower template 12 has a lower groove 121 on the side near the upper template 11. The flaring device 2 includes a push rod 21 on one side of the clamping mold 1 and a flaring rod 22 on the side of the clamping mold 1 away from the push rod 21. The push rod 21 abuts against the pipe fitting clamped by the clamping mold 1, and the flaring rod 22 flares the pipe fitting. The flaring rod 22 has a locking boss 131. The upper groove 111 and the lower groove 121 abut against each other to form a clamping cavity 113. The clamping cavity 113 has a locking groove 114 corresponding to the locking boss 131.

[0026] The clamping groove 114 is spirally arranged around the inner wall of the clamping cavity 113. The flared rod 22 is provided with a smooth transition multi-stage step 13 near one end of the clamping mold 1, the clamping convex 131 is spirally arranged around the multi-stage step 13, and the clamping convex 131 and the clamping groove 114 are correspondingly arranged. The clamping cavity 113 is provided with a guide convex 1131 near one end of the flared rod 22, the guide convex 1131 is provided with a guide groove 1132, and the guide groove 1132 guides the clamping convex 131 into the clamping groove 114. The guide groove 1132 is provided as a horn shape. The clamping convex 131 gradually decreases towards the clamping mold 1. The flaring device 2 is slidingly connected to the top surface of the base plate 3. The flared rod 22 is provided with a flared driving device 4 away from the clamping mold 1, the flared driving device 4 pushes the flared rod 22 to move towards the clamping mold 1, and the flared rod 22 flares the pipe. The ejector rod 21 is provided with an ejector rod driving device 5 away from the clamping mold 1, the ejector rod driving device 5 drives the ejector rod 21, so that the ejector rod 21 and the pipe abut. The flared driving device 4 and the ejector rod driving device 5 are linear driving devices. The flaring device 2 includes a first base 6 and a second base 7, the first base 6 is connected with a flange seat 23, the flared rod 22 is movably connected to the flange seat 23, and a spring is connected between the flared rod 22 and the flange seat 23. One end of the spring is connected with the flared rod 22, and the other end of the spring is connected with the flange seat 23. The second base 7 is connected with the ejector rod 21. The first base 6 is connected with a first lead screw 61, the first lead screw 61 is drivingly connected with the flange seat 23, the first lead screw 61 is connected with a first motor 62, the first motor 62 drives the first lead screw 61 to rotate, and the first lead screw 61 is drivingly connected with a feeding device 63, the feeding device 63 is slidingly connected with the first base 6. The second base 7 is provided with a second lead screw 71, the second lead screw 71 is drivingly connected with the ejector rod 21, the second lead screw 71 is connected with a second motor 72, the second motor 72 drives the second lead screw 71 to rotate, and the second lead screw 71 is drivingly connected with a discharging device 73, the discharging device 73 is slidingly connected with the second base 7. The upper die plate 11 is provided with a pressing cylinder 115 on the upper side, the pressing cylinder 115 is drivingly connected with the upper die plate 11, and the pressing cylinder 115 presses the upper die plate 11 to the top surface of the lower die plate 12.

[0027] During the use of this invention, the first motor 62 drives the first lead screw 61 to rotate, and the first lead screw 61 drives the feeding device 63 to move to the hopper. After the feeding device 63 picks up the pipe fitting, the first lead screw 61 drives the feeding device 63 to move to the clamping mold 1. The feeding device 63 puts the material into the lower groove 121, and the clamping cylinder 115 presses the upper template 11 against the top surface of the lower template 12 to clamp the pipe material. The push rod driving device 5 drives the push rod 21 to extend, and the flaring driving device 4 drives the flaring rod 22 to extend. The push rod 21 abuts against the pipe fitting, and then the flaring rod 22 flares the pipe fitting. The flaring process includes: the locking boss 131 extending into the guide groove 1132, the locking boss 131 entering the locking groove 114 along the guide groove 1132, and the flaring rod 22 rotating simultaneously, causing the spring to rotate and twist. After flaring is completed, the flaring drive device 4 drives the flaring rod 22 to retract, the locking boss 131 disengages from the locking groove 114, and at the same time the flaring rod 22 rotates in the opposite direction, the spring resets, and the flaring rod 22 returns to its initial position. The second motor 72 drives the unloading device 73 to move to the clamping mold 1 via the second lead screw 71. The unloading device 73 takes the flared pipe fitting, and the second motor 72 reverses to drive the unloading device 73 to the unloading bin for unloading.

[0028] like Figure 6 The illustrated automotive exhaust system flare lock mold includes a feeding device 63 comprising a first square plate 631 driven to a first lead screw 61, a feeding slide rail 632 connected to the first square plate 631, the feeding slide rail 632 being vertically arranged, a first push plate 637 slidably connected to the feeding slide rail 632, a first bushing 633 connected to the first push plate 637, a feeding rod 634 slidably connected to the first bushing 633, a first cylinder 635 connected to the side of the first push plate 637 away from the feeding rod 634, the cylinder shaft of the first cylinder 635 passing through the first push plate 637 and the feeding rod 634 in a driving connection. A second cylinder 636 is provided on the lower side of the first push plate 637, the cylinder shaft of the second cylinder 636 being vertically arranged, and the second cylinder 636 being drivenly connected to the first push plate 637. When material needs to be fed, the first motor 62 drives the feeding device 63 to move to the hopper, the second cylinder 636 drives the first push plate 637 to move down along the feeding slide rail 632, then the first cylinder 635 drives the feeding rod 634 to extend out from the first bushing 633 and into the through hole of the material tube, then the second cylinder 636 drives the first push plate 637 to move up along the feeding slide rail 632, the first motor 62 drives the feeding device 63 to move to the clamping mold 1, the first cylinder 635 drives the feeding rod 634 to retract, and the tube falls into the lower groove 12 to wait for flaring.

[0029] like Figure 7The shown automobile exhaust system flared locking mold, blanking device 73 includes driving connection in the second screw rod 71 second square plate 731, second square plate 731 is connected with blanking slide rail 732, blanking slide rail 732 is vertically arranged, blanking slide rail 732 is slidably connected with second push plate 737, second push plate 737 is connected with second bushing 733, second bushing 733 is axially slidably connected with blanking rod 734, second push plate 737 is connected with third cylinder 735 away from blanking rod 734 side, the cylinder shaft of third cylinder 735 passes through second push plate 737 and blanking rod 734 driving connection. The fourth cylinder 736 is arranged on the lower side of the second push plate 737, and the cylinder shaft of the fourth cylinder 736 is vertically arranged. The fourth cylinder 736 and the second push plate 737 are drivingly connected. When blanking is needed, the second motor 72 drives the blanking device 73 to move to the clamping mold 1, the fourth cylinder 736 drives the second push plate 737 to move downward along the blanking slide rail 732, then the third cylinder 735 drives the blanking rod 734 to extend out of the second bushing 733, the blanking rod 734 extends into the through hole of the flared pipe, then the fourth cylinder 736 drives the second push plate 737 to move upward along the blanking slide rail 732, the second motor 72 drives the blanking device 73 to move to the blanking bin, the third cylinder 735 drives the blanking rod 734 to retract, and the pipe falls into the blanking bin.

[0030] The above examples are exemplary, the purpose is to illustrate the technical concept and characteristics of the present application, so that the understanding of this field can understand the content of the present application and to implement, and can not limit the protection scope of the present application. Any equivalent changes or modifications according to the spirit and essence of the present application should be covered within the scope of the present application.

Claims

1. An automobile exhaust system flared lock collar mold characterized by: The utility model provides a pipe expanding device, which comprises a clamping die (1) and an expanding device (2) arranged opposite to the clamping die (1), wherein the clamping die (1) comprises an upper die plate (11) and a lower die plate (12), the upper die plate (11) is provided with an upper groove (111) on the side close to the lower die plate (12), and the lower die plate (12) is provided with a lower groove (121) on the side close to the upper die plate (11); the expanding device (2) comprises a top rod (21) arranged on one side of the clamping die (1) and an expanding rod (22) arranged on the side of the clamping die (1) away from the top rod (21); the top rod (21) abuts against a pipe clamped by the clamping die (1), and the expanding rod (22) expands the pipe; the expanding rod (22) is provided with a locking boss (131), the upper groove (111) and the lower groove (121) abut against each other to form a clamping cavity (113), and the clamping cavity (113) is provided with a locking groove (114) corresponding to the locking boss (131); the locking groove (114) is spirally arranged around the inner wall of the clamping cavity (113); the expanding rod (22) is provided with a smooth multi-stage step (13) at one end close to the clamping die (1), the locking boss (131) is spirally arranged around the multi-stage step (13), and the locking boss (131) and the locking groove (114) are correspondingly arranged; the expanding device (2) comprises a first base (6) and a second base (7), the first base (6) is connected with a flange base (23), the expanding rod (22) is movably connected to the flange base (23), and a spring is connected between the expanding rod (22) and the flange base (23); the second base (7) is connected with the top rod (21); during pipe expanding, the expanding rod (22) rotates; the first base (6) is connected with a first lead screw (61), the first lead screw (61) is drivingly connected with the flange base (23), the first lead screw (61) is connected with a first motor (62), the first motor (62) drives the first lead screw (61) to rotate, the first lead screw (61) is drivingly connected with a feeding device (63), and the feeding device (63) is slidingly connected with the first base (6); the second base (7) is provided with a second lead screw (71), the second lead screw (71) is drivingly connected with the top rod (21), the second lead screw (71) is connected with a second motor (72), the second motor (72) drives the second lead screw (71) to rotate, the second lead screw (71) is drivingly connected with a discharging device (73), and the discharging device (73) is slidingly connected with the second base (7); The feeding device (63) comprises a first square plate (631) which is drivingly connected to the first lead screw (61), the first square plate (631) is connected with a feeding slide rail (632), the feeding slide rail (632) is vertically arranged, the feeding slide rail (632) is slidingly connected with a first push plate (637), the first push plate (637) is connected with a first bushing (633), the first bushing (633) is axially slidingly connected with a feeding rod (634), the first push plate (637) is connected with a first air cylinder (635) away from the feeding rod (634), the cylinder shaft of the first air cylinder (635) penetrates through the first push plate (637) and the feeding rod (634) and is drivingly connected; the lower side of the first push plate (637) is provided with a second air cylinder (636), the cylinder shaft of the second air cylinder (636) is vertically arranged, the second air cylinder (636) is drivingly connected with the first push plate (637); the feeding rod (634) extends into the through hole of the pipe.

2. The automotive exhaust system flare lock die of claim 1, wherein: The clamping cavity (113) is provided with a guide boss (1131) near one end of the flared rod (22), the guide boss (1131) is provided with a guide groove (1132), the guide groove (1132) guides the locking boss (131) into the locking groove (114).

3. The automotive exhaust system flare lock die of claim 1, wherein: The locking boss (131) gradually decreases towards the clamping mold (1).

4. The automotive exhaust system flare lock die of claim 1, wherein: The flaring device (2) is slidingly connected to the top surface of the bottom plate (3); the flared rod (22) is provided with a flaring driving device (4) away from the clamping mold (1), the flaring driving device (4) pushes the flared rod (22) to move towards the clamping mold (1), and the flared rod (22) flares the pipe; the ejector rod (21) is provided with an ejector rod driving device (5) away from the clamping mold (1), the ejector rod driving device (5) drives the ejector rod (21), so that the ejector rod (21) abuts against the pipe.

5. The automotive exhaust system flare lock die of claim 1, wherein: The feeding device (63) comprises a first square plate (631) which is drivingly connected to the first lead screw (61), the first square plate (631) is connected with a feeding slide rail (632), the feeding slide rail (632) is vertically arranged, the feeding slide rail (632) is slidingly connected with a first push plate (637), the first push plate (637) is connected with a first bushing (633), the first bushing (633) is axially slidingly connected with a feeding rod (634), the first push plate (637) is connected with a first air cylinder (635) away from the feeding rod (634), the cylinder shaft of the first air cylinder (635) penetrates through the first push plate (637) and the feeding rod (634) and is drivingly connected; the lower side of the first push plate (637) is provided with a second air cylinder (636), the cylinder shaft of the second air cylinder (636) is vertically arranged, the second air cylinder (636) is drivingly connected with the first push plate (637); the feeding rod (634) extends into the through hole of the pipe.

6. The automotive exhaust system flare lock die of claim 1, wherein: The upper mold plate (11) is provided with a pressing air cylinder (115) on the upper side, the pressing air cylinder (115) is drivingly connected with the upper mold plate (11), and the pressing air cylinder (115) presses the upper mold plate (11) against the top surface of the lower mold plate (12).

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