Automatic welding machine for machining automobile silencer

Abstract

The invention discloses an automatic welding machine for automobile silencer machining, and relates to the field of automobile silencer machining, the automatic welding machine comprises a workbench, a three-axis linkage mechanism and a laser welding gun, a transfer mechanism is arranged in the workbench, a connecting frame is arranged at the top of the transfer mechanism, and rolling round tables are installed on the two sides of the connecting frame; two groups of edge rolling pushing assemblies are symmetrically arranged at the top of the workbench, a second threaded rod is rotationally connected to the interior of one group of edge rolling pushing assembly, a moving block is in threaded connection to the exterior of the second threaded rod, and a discharging support matched with the edge rolling table is arranged at the end of the moving block; the second threaded rod and the first threaded rod are in transmission connection through a transmission assembly. The two groups of rolling round tables are arranged to work alternately, and when a metal plate of one group of rolling round tables is bent and welded, the other group of rolling round tables is used for feeding the metal plate, so that feeding and discharging of the welding work of the automobile silencer shell can be synchronously carried out, and the working efficiency of welding of the silencer shell is improved.

Description

Technical Field

[0001] The present invention relates to the field of automobile muffler processing, and specifically to an automatic welding machine for automobile muffler processing. Background Art

[0002] An automobile muffler (also called an exhaust muffler) is an important component in an automobile exhaust system. Its main function is to reduce the noise generated when the automobile engine exhausts. It reduces the intensity of the exhaust sound by absorbing or attenuating the sound waves in the airflow.

[0003] The curling and welding process of an automobile muffler is one of the steps in manufacturing the muffler. The muffler shell is usually made of stainless steel or aluminum alloy metal sheets. A shearing machine or a laser cutting device is used to cut the metal sheets into appropriate sizes. Then, a multi-axis robotic arm uses a suction cup tooling to adsorb and transfer the cut metal sheets to the transfer mechanism of the curling machine. The transfer mechanism pushes the metal sheets up to fit with the curling table of the curling machine, causing the metal sheets to surround the curling table. Then, two closing jigs further push the metal sheets to surround the curling table for one circle. Finally, a laser welding gun is used to weld the seam of the metal sheets. After the metal sheets are welded, the blanking bracket on the curling table pushes the muffler shell for blanking.

[0004] In the prior art, for the welding work of an automobile muffler shell, its main steps are carried out in sequence according to metal sheet adsorption and feeding, preliminary bending of the metal sheet, secondary bending and closing of the metal sheet, seam welding, and blanking. Each step is completed independently, which makes the overall working efficiency of the welding work of the muffler shell still capable of being further improved. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide an automatic welding machine for automobile muffler processing to solve the technical problems mentioned in the above background.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic welding machine for automobile muffler processing, comprising a workbench, a three-axis linkage mechanism and a laser welding gun, a transfer mechanism is arranged inside the workbench, a connecting frame is arranged on the top of the transfer mechanism, and a rolling table is installed on one side of the connecting frame, two groups of rolling and pushing components are symmetrically arranged on the top of the workbench, and the rolling and pushing components include two groups of mounting frames, and a first guide rod is arranged between the two groups of mounting frames, a first threaded rod is rotatably connected between the two groups of mounting frames, and one end of the first threaded rod is connected to a driving device, the external thread of the first threaded rod is connected to a moving seat, the moving seat and the first guide rod are movably arranged, and a first telescopic cylinder is arranged on the top of the moving seat, and a pushing fixture is installed at the end of the first telescopic cylinder, one group of the rolling and pushing components is rotatably connected to a second threaded rod, and the external thread of the second threaded rod is connected to a moving block, and a blanking bracket matching the rolling table is arranged at the end of the moving block, and the second threaded rod and the first threaded rod are transmission-connected by setting a transmission assembly.

[0007] By adopting the above technical solution, two groups of rolling tables are set to work alternately. When the metal sheet of one group of rolling tables is bent and welded, the other group of rolling tables loads the metal sheet, so that the loading and unloading of the welding work of the automobile muffler shell can be carried out synchronously, thereby improving the working efficiency of the muffler shell welding. When the metal sheet of one group of rolling tables completes the rolling welding work, the rolling pushing assembly will move to the front of the other group of rolling tables, and the rolling pushing assembly will drive the unloading bracket to move when moving to push the unloading and reset the muffler shell that has been welded.

[0008] The present invention is further configured such that a second guide rod is provided between two groups of mounting frames of one group of the rolling and pushing components, and the second guide rod and the moving block are movably interpenetratingly provided.

[0009] Preferably, the second guide rod is provided to limit the displacement of the moving block.

[0010] The present invention is further configured as follows: the transmission assembly includes a transmission shaft rotatably connected to the side of the mounting frame, and the transmission shaft and the first threaded rod are connected by a half gear. The transmission assembly also includes a first spur gear rotatably connected to the side of the mounting frame, and the first spur gear and the second threaded rod are connected by a first pulley assembly. The transmission assembly also includes a second spur gear rotatably connected to the side of the mounting frame, and the second spur gear and the second threaded rod are connected by a second pulley assembly. The half gear and the first spur gear are meshed with each other, and the half gear and the second spur gear are meshed with each other.

[0011] Preferably, by setting a transmission component to connect the first threaded rod and the second threaded rod, when the pushing and clamping fixture moves from one set of rolling round tables to another set of rolling round tables for work, it will drive the displacement of the blanking support to push the welded muffler housing for blanking and reset.

[0012] The present invention is further configured such that the transfer mechanism includes a table body, and a second telescopic cylinder is provided at the bottom of the table body. An elevating flat plate is provided above the table body, and multiple groups of third guiding rods are provided at the bottom of the elevating flat plate. The multiple groups of third guiding rods are movably penetrated through the table body, and the output end of the second telescopic cylinder is connected to the elevating flat plate.

[0013] Preferably, by providing multiple groups of third guiding rods, it can play a role in restricting the movement of the elevating flat plate, and the second telescopic cylinder is provided to push the elevating flat plate for height adjustment.

[0014] The present invention is further configured such that two groups of bending fixtures are symmetrically provided at the top of the elevating flat plate, and clamping plates are rotatably connected to both sides of the elevating flat plate. The clamping plates are connected to the outer wall of the elevating flat plate by providing second springs.

[0015] Preferably, by providing the clamping plates, when the clamping plates lose the restriction of the guiding blocks, they will fix the metal blanking plate on the top of the bending fixtures, reducing the risk of the metal blanking plate shaking, thereby improving the welding accuracy of the muffler housing.

[0016] The present invention is further configured such that two groups of guiding blocks matching the clamping plates are symmetrically provided at the top of the table body.

[0017] Preferably, by providing the guiding blocks to push the clamping plates, when the elevating flat plate descends to receive the metal blanking plate from the suction cup tooling, the clamping plates are in an open state, so as to facilitate the placement of the metal blanking plate on the top of the two groups of bending fixtures.

[0018] The present invention is further configured such that rolling round tables are provided at both ends of the connecting frame, and the two groups of rolling round tables are symmetrically arranged. A through groove matching the clamping plate is opened at the bottom of the rolling round table.

[0019] Preferably, by setting the two groups of rolling round tables to perform welding work alternately, the welding and loading / unloading work of the metal blanking plate can be carried out synchronously, improving work efficiency.

[0020] The present invention is further configured such that two groups of transfer mechanisms are provided, and the two groups of transfer mechanisms are located below the two groups of rolling round tables. The connecting frame is installed on the tops of the two table bodies.

[0021] Preferably, by providing two groups of transfer mechanisms to feed two groups of rolling round tables respectively, work efficiency can be improved.

[0022] The present invention is further configured such that a first blanking opening and a second blanking opening are formed at the top of the workbench, and the first blanking opening and the second blanking opening are located on the sides of two sets of curling tables.

[0023] Preferably, by providing the first blanking opening and the second blanking opening, the silencer housing completed by welding can be collected.

[0024] In summary, the present invention mainly has the following beneficial effects:

[0025] 1. In the present invention, by arranging two sets of curling tables to work alternately, when the metal sheet of one set of curling tables is being bent and welded, the other set of curling tables is performing the feeding operation of the metal sheet, so that the feeding and discharging of the welding work of the automobile silencer housing can be carried out synchronously, improving the working efficiency of the welding of the silencer housing. When the metal sheet of one set of curling tables completes the curling and welding work, the curling and pushing assembly will move to the front of the other set of curling tables, and when the curling and pushing assembly moves, it will drive the blanking support to move to push and discharge the completed welded silencer housing and reset.

[0026] 2. In the present invention, by providing the clamping plate and the guiding block, the metal sheet on the transfer mechanism can be clamped and positioned. When the metal sheet is transferred to the top of the transfer mechanism through the suction cup tooling, the transfer mechanism drives the metal sheet to move up and down, which easily causes the position of the metal sheet to deviate, thus affecting the welding accuracy of the joint of the metal sheet. In this application, by providing the clamping plate pulled by the second spring to fix the metal sheet, and the clamping plate is controlled by the guiding block to loosen, the shaking of the metal sheet can be reduced, the accuracy of the curling and docking of the metal sheet can be improved, and the welding quality of the silencer housing can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 is a schematic diagram of the structure of the curling and pushing assembly of the present invention;

[0029] Figure 3 is a schematic diagram of the installation of the curling and pushing assembly, the second threaded rod, the blanking support and the transmission assembly of the present invention;

[0030] Figure 4 is a schematic diagram of the structure of the transmission assembly of the present invention;

[0031] Figure 5 is of the present invention Figure 4 magnified view of part A in;

[0032] Figure 6 is a schematic diagram of the installation of the connecting frame, the curling table and the transfer mechanism of the present invention;

[0033] Figure 7Schematic structural diagram of the transfer mechanism of the present invention;

[0034] Figure 8 Schematic installation diagram of the lifting flat plate and the clamping plate of the present invention;

[0035] Figure 9 Schematic installation diagram of the connecting frame and two groups of curling platforms of the present invention;

[0036] Figure 10 Schematic diagram of the curling and pushing assembly of the present invention pushing the metal sheet to close.

[0037] Explanation of reference numerals:

[0038] 1, workbench; 2, three-axis linkage mechanism; 3, laser welding gun; 4, first blanking port; 5, second blanking port; 6, curling and pushing assembly; 601, mounting frame; 602, first guide rod; 603, first threaded rod; 604, driving device; 605, moving seat; 606, first telescopic cylinder; 607, pushing and clamping fixture; 7, second threaded rod; 8, second guide rod; 9, moving block; 10, blanking support; 11, transmission assembly; 1101, transmission shaft; 1102, half gear; 1103, reduction gear set; 1104, first spur gear; 1105, first pulley assembly; 1106, second spur gear; 1107, second pulley assembly; 12, transfer mechanism; 1201, table body; 1202, second telescopic cylinder; 1203, lifting flat plate; 1204, third guide rod; 1205, bending fixture; 1206, clamping plate; 1207, second spring; 1208, guide block; 13, connecting frame; 14, curling platform; 15, through groove. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0040] Next, the embodiments of the present invention will be described according to the overall structure of the present invention.

[0041] Please refer to Figure 1 - Figure 10An automatic welding machine for automobile muffler processing includes a workbench 1, a three-axis linkage mechanism 2 and a laser welding gun 3. The laser welding gun 3 is used to perform curling welding on metal plates. A transfer mechanism 12 is arranged inside the workbench 1, and a connecting frame 13 is arranged on the top of the transfer mechanism 12, and a curling table 14 is installed on one side of the connecting frame 13. The transfer mechanism 12 is used to push the metal plate to rise and cooperate with the curling table 14 to make the metal plate initially bend. Two groups of curling push-fit components 6 are symmetrically arranged on the top of the workbench 1. The two groups of curling push-fit components 6 cooperate with each other to perform secondary bending on the initially bent metal plate to form a curl, and the curling push-fit components 6 include two groups of mounting frames 601, and a first guide rod 602 is arranged between the two groups of mounting frames 601, and a first threaded rod is rotatably connected between the two groups of mounting frames 601. 603, and one end of the first threaded rod 603 is connected to a driving device 604, the external thread of the first threaded rod 603 is connected to a moving seat 605, the moving seat 605 and the first guide rod 602 are movably arranged, and a first telescopic cylinder 606 is arranged on the top of the moving seat 605, and a push-fit clamp 607 is installed on the end of the first telescopic cylinder 606, one group of rolling and pushing components 6 is internally rotatably connected to the second threaded rod 7, and the external thread of the second threaded rod 7 is connected to a moving block 9, and the end of the moving block 9 is provided with a blanking bracket 10 matching the rolling table 14, the second threaded rod 7 and the first threaded rod 603 are connected by a transmission assembly 11, and the rolling and pushing assembly 6 will drive the blanking bracket 10 to move when moving to push the muffler shell that has been welded to be unloaded and reset.

[0042] In the above embodiments, please refer to Figure 3 and Figure 4 A second guide rod 8 is arranged between two sets of mounting frames 601 of one set of rolling and pushing components 6, and the second guide rod 8 and the moving block 9 are movably arranged to penetrate each other. By setting the second guide rod 8, the displacement of the moving block 9 can be limited.

[0043] In the above embodiments, please refer to Figure 4 and Figure 5, the transmission assembly 11 includes a transmission shaft 1101 rotatably connected to the side of the mounting frame 601, and the transmission shaft 1101 and the first threaded rod 603 are drivingly connected through a semi-gear 1102. The transmission assembly 11 further includes a first spur gear 1104 rotatably connected to the side of the mounting frame 601, and the first spur gear 1104 and the second threaded rod 7 are drivingly connected through a first pulley assembly 1105. The transmission assembly 11 further includes a second spur gear 1106 rotatably connected to the side of the mounting frame 601, and the second spur gear 1106 and the second threaded rod 7 are drivingly connected through a second pulley assembly 1107. The semi-gear 1102 and the first spur gear 1104 mesh with each other, and the semi-gear 1102 and the second spur gear 1106 mesh with each other. By providing the transmission assembly 11 to connect the first threaded rod 603 and the second threaded rod 7, when the pushing and clamping fixture 607 moves from one set of rolling round tables 14 to another set of rolling round tables 14 for work, it will drive the blanking support 10 to displace and push the welded muffler housing for blanking and reset.

[0044] In the above embodiment, specifically, please refer to again Figure 7 , the transfer mechanism 12 includes a table body 1201, and a second telescopic cylinder 1202 is provided at the bottom of the table body 1201. An elevating flat plate 1203 is provided above the table body 1201, and a plurality of groups of third guide rods 1204 are provided at the bottom of the elevating flat plate 1203, and the plurality of groups of third guide rods 1204 are movably penetrated through the table body 1201. The output end of the second telescopic cylinder 1202 is connected to the elevating flat plate 1203. By providing the plurality of groups of third guide rods 1204, the movement of the elevating flat plate 1203 can be restricted, and the second telescopic cylinder 1202 is provided to push the elevating flat plate 1203 for height adjustment.

[0045] In the above embodiment, specifically, please refer to again Figure 7 and Figure 8 , two groups of bending clamps 1205 are symmetrically provided at the top of the elevating flat plate 1203, and clamping plates 1206 are rotatably connected to both sides of the elevating flat plate 1203, and the clamping plates 1206 are connected to the outer wall of the elevating flat plate 1203 through a second spring 1207. By providing the clamping plates 1206, when the clamping plates 1206 lose the restriction of the guide block 1208, they will fix the metal sheet on the top of the bending clamp 1205, reducing the risk of the metal sheet shaking, thereby improving the welding accuracy of the muffler housing.

[0046] In the above embodiment, specifically, please refer to again Figure 7, two sets of guide blocks 1208 matching the clamping plates 1206 are symmetrically arranged at the top of the table body 1201. By setting the guide blocks 1208 to push the clamping plates 1206, when the lifting flat plate 1203 descends to receive the metal sheet from the suction cup tooling, the clamping plates 1206 are in an open state, so that the metal sheet can be placed on the tops of the two bending jigs 1205.

[0047] In the above embodiment, specifically, please refer to Figure 9 , rolling round platforms 14 are arranged at both ends of the connecting frame 13, and the two sets of rolling round platforms 14 are symmetrically arranged. A through groove 15 matching the clamping plate 1206 is opened at the bottom of the rolling round platform 14. By setting the two sets of rolling round platforms 14 to perform welding work alternately, the welding and loading / unloading work of the metal sheet can be carried out synchronously, improving work efficiency.

[0048] In the above embodiment, specifically, please refer to Figure 1 , two sets of transfer mechanisms 12 are provided, and the two sets of transfer mechanisms 12 are located below the two sets of rolling round platforms 14. The connecting frame 13 is installed on the tops of the two table bodies 1201. By setting the two sets of transfer mechanisms 12 to feed the two sets of rolling round platforms 14 respectively, work efficiency can be improved.

[0049] In the above embodiment, specifically, please refer to Figure 1 , a first discharge port 4 and a second discharge port 5 are opened at the top of the workbench 1, and the first discharge port 4 and the second discharge port 5 are located on the sides of the two sets of rolling round platforms 14. By setting the first discharge port 4 and the second discharge port 5, the welded muffler housing can be collected conveniently.

[0050] When the present invention works specifically: the suction cup tooling driven by the robotic arm adsorbs and transfers the metal sheet to the bending jig 1205 on the top of a set of transfer mechanism 12. Then, the second telescopic cylinder 1202 extends to push the lifting flat plate 1203 to rise. The clamping plate 1206 is released from the restriction of the guide block 1208 and clamps the metal sheet under the reset action of the second spring 1207. As the lifting flat plate 1203 drives the metal sheet to continue to rise, it cooperates with a set of rolling round platforms 14 to squeeze the metal sheet, so that the metal sheet is clamped between the two bending jigs 1205, realizing the preliminary bending of the metal sheet.

[0051] Next, the two sets of first telescopic cylinders 606 are respectively started to push the two sets of push-to-close clamps 607 closer to each other. The two sets of push-to-close clamps 607 approaching each other will bend the metal sheet for the second time, so that the metal sheet is rolled and butted. The two sets of push-to-close clamps 607 are kept stationary, and the three-axis linkage mechanism 2 is started to adjust the position and height of the laser welding gun 3. Then the laser welding gun 3 welds the joints of the metal sheet. When welding, spot welding is first performed on the two ends and the middle of the joint, and then the complete gap is welded. Then the two sets of push-to-close clamps 607 are retracted, and the driving device 604 is started to drive the first threaded rod 603 to rotate. The screw principle is used to make the movable seat 605, the first telescopic cylinder 606 and the push-to-close clamps 607 move to the position of the other set of rolling tables 14. In the process of the first threaded rod 603 rotating, the transmission shaft 1101 is driven to rotate through the reduction gear set 1103, so that the half gear 1 102 rotates 360°, and during the first 180° rotation of the half gear 1102, the half gear 1102 and the first spur gear 1104 are meshed, and the first spur gear 1104 drives the second threaded rod 7 to rotate through the first pulley assembly 1105, and then the moving block 9 pushes the unloading bracket 10 to work, and the unloading bracket 10 pushes the welded muffler shell to be unloaded, and during the second 180° rotation of the first threaded rod 603, the half gear 1102 and the second spur gear 1106 are meshed, and the second spur gear 1106 drives the second threaded rod 7 to rotate in the opposite direction compared with before through the second pulley assembly 1107, and then the moving block 9 drives the unloading bracket 10 to reset, that is, the unloading bracket 10 moves to complete the unloading of the muffler shell and resets it, and the moving seat 605, the first telescopic cylinder 606 and the pushing fixture 607 also move to the position of another set of rolling tables 14.

[0052] At the same time, another group of suction cup tooling driven by a robotic arm feeds another group of transfer mechanisms 12, and the transfer mechanism 12 cooperates with another group of rolling tables 14 to perform preliminary bending on the metal sheet. According to the above steps, the rolling and welding work of the metal sheet is repeated, and the welded muffler shell falls from the first discharge port 4 and the second discharge port 5 into the collection box.

[0053] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An automatic welding machine for automobile muffler processing, comprising a workbench (1), a three-axis linkage mechanism (2) and a laser welding gun (3), characterized in that: The workbench (1) is provided with a transfer mechanism (12) inside, and a connecting frame (13) is provided on the top of the transfer mechanism (12), and a rolling platform (14) is installed on one side of the connecting frame (13), two groups of rolling push-fit assemblies (6) are symmetrically provided on the top of the workbench (1), and the rolling push-fit assemblies (6) include two groups of mounting frames (601), and a first guide rod (602) is provided between the two groups of mounting frames (601), a first threaded rod (603) is rotatably connected between the two groups of mounting frames (601), and one end of the first threaded rod (603) is connected to a driving device (604), and the external thread of the first threaded rod (603) is connected to the A movable seat (605) is connected, and the movable seat (605) and the first guide rod (602) are movably arranged to penetrate each other, and a first telescopic cylinder (606) is arranged on the top of the movable seat (605), and a push-fit clamp (607) is installed at the end of the first telescopic cylinder (606), one group of the rolling push-fit components (6) is internally rotatably connected to a second threaded rod (7), and the second threaded rod (7) is externally threadedly connected to a movable block (9), and a material unloading bracket (10) matching the rolling table (14) is arranged at the end of the movable block (9), and the second threaded rod (7) and the first threaded rod (603) are transmission-connected by setting a transmission component (11).

2. The automatic welding machine for automobile muffler processing according to claim 1 is characterized in that: A second guide rod (8) is arranged between two groups of mounting frames (601) of one group of the rolling and pushing components (6), and the second guide rod (8) and the moving block (9) are movably arranged to penetrate each other.

3. The automatic welding machine for automobile muffler processing according to claim 2 is characterized in that: The transmission assembly (11) comprises a transmission shaft (1101) rotatably connected to the side of the mounting frame (601), and the transmission shaft (1101) and the first threaded rod (603) are connected in transmission by means of a half gear (1102). The transmission assembly (11) also comprises a first spur gear (1104) rotatably connected to the side of the mounting frame (601), and the first spur gear (1104) and the second threaded rod (7) are connected in transmission by means of a first pulley assembly (1105). The transmission assembly (11) also comprises a second spur gear (1106) rotatably connected to the side of the mounting frame (601), and the second spur gear (1106) and the second threaded rod (7) are connected in transmission by means of a second pulley assembly (1107). The half gear (1102) and the first spur gear (1104) are meshed with each other, and the half gear (1102) and the second spur gear (1106) are meshed with each other.

4. The automatic welding machine for automobile muffler processing according to claim 3 is characterized in that: The transfer mechanism (12) comprises a table body (1201), and a second telescopic cylinder (1202) is arranged at the bottom of the table body (1201); a lifting plate (1203) is arranged above the table body (1201), and a plurality of third guide rods (1204) are arranged at the bottom of the lifting plate (1203), and the plurality of third guide rods (1204) and the table body (1201) are movably interwoven, and an output end of the second telescopic cylinder (1202) is connected to the lifting plate (1203).

5. The automatic welding machine for automobile muffler processing according to claim 4 is characterized in that: Two sets of bending clamps (1205) are symmetrically arranged on the top of the lifting plate (1203), and clamping plates (1206) are rotatably connected to both sides of the lifting plate (1203), and the clamping plates (1206) are connected to the outer wall of the lifting plate (1203) by setting a second spring (1207).

6. The automatic welding machine for automobile muffler processing according to claim 5 is characterized in that: Two groups of guide blocks (1208) matching the clamping plate (1206) are symmetrically arranged on the top of the table body (1201).

7. The automatic welding machine for automobile muffler processing according to claim 6 is characterized in that: Both ends of the connecting frame (13) are provided with rolling platforms (14), and the two groups of rolling platforms (14) are symmetrically arranged, and the bottom of the rolling platforms (14) is provided with a through groove (15) matching the clamping plate (1206).

8. The automatic welding machine for automobile muffler processing according to claim 7 is characterized in that: The transfer mechanism (12) is provided in two groups, and the two groups of transfer mechanisms (12) are located below the two groups of rolling tables (14), and the connecting frame (13) is installed on the top of the two groups of table bodies (1201).

9. The automatic welding machine for automobile muffler processing according to claim 8, characterized in that: The top of the workbench (1) is provided with a first material discharge opening (4) and a second material discharge opening (5), and the first material discharge opening (4) and the second material discharge opening (5) are located on the sides of the two groups of rolling tables (14).

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