CN115740843A - Adjustable welding device for automobile exhaust pipe and welding method thereof - Google Patents

Abstract

The invention discloses an adjustable welding device for an automobile exhaust pipe and a welding method thereof, relates to the technical field of automobile exhaust pipe welding, and aims to solve the problems that when an existing device is used, a pipeline is positioned and is driven to rotate to complete welding, when a bent pipe is welded, the deflection range of a bent part of the pipeline is large, limitation exists, machining is inconvenient, a feeding and discharging mechanism is not provided for the device, and machining efficiency is affected. The straight pipe feeding platform is arranged at the rear end of the annular welding mechanism, and a straight pipe feeding machine is mounted on one side of the straight pipe feeding platform; the bent pipe feeding table is arranged at the front end of the annular welding mechanism, and a first electric guide rail is embedded in the bent pipe feeding table; and the transfer mechanism is arranged on the sliding block of the first electric guide rail.

Description

Adjustable welding device for automobile exhaust pipe and welding method thereof

Technical Field

The invention relates to the technical field of welding of automobile exhaust pipes, in particular to an adjustable welding device for an automobile exhaust pipe and a welding method thereof.

Background

In the production and manufacturing process of the automobile exhaust pipe, a welding device is needed to weld two raw material pipe bodies;

for example, the application number CN113103082A is named as an automobile exhaust pipe welding forming post-processing device and a post-processing method, the device comprises a base, a fixing device and a polishing device, the lower end of the base is connected with the existing ground, the fixing device and the polishing device are sequentially installed at the upper end of the base from front to back, the automobile exhaust pipe can be fixed through the matching among a fixing ring, a limiting bolt and arc-shaped blocks, so that the automobile exhaust pipe after welding forming is prevented from being deviated and shaken in the polishing process, and the distance between the arc-shaped blocks can be adjusted through adjusting the limiting bolt, so that the device can fix the exhaust pipes with different diameters, and further, the exhaust pipes with different diameters can be polished.

Because the automobile exhaust pipe comprises a bent pipe and a straight pipe, the device is used for positioning the pipeline and driving the pipeline to rotate to complete welding work, when the bent pipe is welded, the deflection range of the bent part of the pipeline is large, limitation exists, machining is inconvenient, and the device is lack of a feeding and discharging mechanism, so that the machining efficiency is influenced; we have therefore proposed an adjustable welding apparatus for an automotive exhaust pipe and a welding method thereof in order to solve the problems set forth above.

Disclosure of Invention

The invention aims to provide an adjustable welding device for an automobile exhaust pipe and a welding method thereof, and aims to solve the problems that in the use process of the conventional device in the background art, a pipeline is positioned and driven to rotate to complete welding work, the deflection range of a bent part of the pipeline is large and limited during the welding of a bent pipe, so that the machining is inconvenient, and the machining efficiency is influenced due to the lack of a feeding and discharging mechanism of the device.

In order to achieve the purpose, the invention provides the following technical scheme: an adjustable welding device for an automobile exhaust pipe comprises an annular welding mechanism;

further comprising:

the straight pipe feeding platform is arranged at the rear end of the annular welding mechanism, and a straight pipe feeding machine is mounted on one side of the straight pipe feeding platform;

the bent pipe feeding table is arranged at the front end of the annular welding mechanism, and a first electric guide rail is embedded in the bent pipe feeding table;

a transfer mechanism mounted on the slider of the first electric rail;

the bent pipe feeding machine is arranged on one side of the front end of the bent pipe feeding table;

the blanking machine is arranged on the other side of the front end of the elbow feeding table, the bases are arranged at the lower ends of the elbow feeding machine and the blanking machine, and the bases are fixedly connected through a connecting bottom plate.

Preferably, cylinder carrying platforms are installed at two ends of two sides of the elbow feeding machine and the blanking machine, a first cylinder is installed at the upper end of each cylinder carrying platform, and a meshed limiting plate is installed at the output end of each first cylinder.

Preferably, first belt pulley is all installed to the inside one end of return bend material loading machine and blanking machine, the second belt pulley is all installed to the inside other end of return bend material loading machine and blanking machine, first belt pulley passes through conveyor belt and is connected with second belt pulley transmission, conveyor belt's outside equidistance is provided with the branch spacer, and just separates the spacer and set up with conveyor belt integrated into one piece, all install step motor on the outer wall of return bend material loading machine and blanking machine one end, and step motor's output and first belt pulley transmission are connected.

Preferably, be provided with a plurality of negative pressure adsorption holes on conveyor belt's the outer wall, the internally mounted of return bend material loading machine and blanking machine has the negative pressure chamber baffle, be provided with the negative pressure chamber between negative pressure chamber baffle and the conveyor belt, the inside in negative pressure chamber is provided with the bearing roller, one side of return bend material loading machine and blanking machine all is provided with the negative pressure union coupling, and the negative pressure union coupling is provided with threely.

Preferably, transportation mechanism includes sliding bottom, collateral branch board and roof, sliding bottom installs on the slider of first electronic guide rail, the both sides in the sliding bottom upper end are installed to the side extension board, the roof is installed in the upper end of side extension board, both sides all install the second cylinder on the outer wall of side extension board, the output of second cylinder runs through and extends to the inside of side extension board, and installs splint, be provided with flexible cushion on the outer wall of splint, sliding bottom's upper surface is provided with a plurality of second balls.

Preferably, the rear end of roof is provided with the extension board, hydraulic telescoping rod is installed to the upper end of extension board, and hydraulic telescoping rod's output runs through to the lower extreme of extension board, and installs the gag lever post, laser sensor is installed to the below of extension board rear end.

Preferably, the pneumatic cylinder mounting panel is installed to the rear end of straight tube material loading platform, first pneumatic cylinder is installed to the rear end of pneumatic cylinder mounting panel, the output of first pneumatic cylinder runs through and extends to the front end of pneumatic cylinder mounting panel, and installs the push pedal, the lower surface mounting of push pedal has a plurality of first balls, the both sides of straight tube material loading bench upper surface all are provided with the arc gib block, the guide pillar is installed to the below of push pedal rear end, and the one end of guide pillar runs through and extends to the outside of pneumatic cylinder mounting panel.

Preferably, the inside of annular welding mechanism is provided with interior ring gear, the junction of interior ring gear and annular welding mechanism is provided with the bearing, be provided with the rack on the outer wall of interior ring gear, the gear room is installed to one side of annular welding mechanism, the internally mounted of gear room has the driving gear, and the driving gear is connected with the rack toothing transmission of interior ring gear outer wall, install the electronic guide rail of second on the inner wall of interior ring gear, install the second pneumatic cylinder on the output of the electronic guide rail of second, install the soldered connection on the output of second pneumatic cylinder.

Preferably, a supporting plate is installed at the joint of the output end of the second hydraulic cylinder and the welding head, an electric push rod is installed above the rear end of the supporting plate, a spring is installed at the output end of the electric push rod, a damping rod is installed inside the spring, and an ultrasonic welding seam probe is installed at one end of the spring.

Preferably, the welding method of the adjustable welding device for the automobile exhaust pipe comprises the following steps:

the method comprises the following steps: placing the bent pipe part and the straight pipe part of the exhaust pipe on a bent pipe feeding machine and a straight pipe feeding machine respectively by manpower or a mechanical arm, leaning the bent part of each bent pipe on a separation block of a conveying belt when feeding the bent pipes, and driving mesh-shaped limiting plates at two sides of the bent pipe feeding machine to extend out to limit the bent pipes;

step two: during conveying, the straight pipe feeding machine moves forward step by step, a section of straight pipe is conveyed to a position between the two arc-shaped guide strips to be positioned, the bent pipe feeding machine is externally connected with the negative pressure mechanism, the negative pressure cavity in the bent pipe generates negative pressure, the bent pipe is adsorbed through the negative pressure adsorption hole in the conveying belt, and when the bent pipe reaches the edge of the conveying belt, the bent pipe is separated from the range of the negative pressure cavity, continues to be conveyed forward and moves to the transfer mechanism;

step three: when the bent pipe is transferred to the transfer mechanism, a laser sensor at the rear end of the mechanism can detect that the pipe is close to the transfer mechanism, when the pipe is separated from the detection range of the laser sensor, the transfer mechanism can smoothly carry the bent pipe, the laser sensor sends a signal to the controller at the moment, the second cylinders at the two sides of the driving mechanism and the hydraulic telescopic rods at the top operate, the second cylinders drive the clamping plates to extend out to clamp the bent pipe, and the hydraulic telescopic rods drive the limiting rods to extend out to limit the rear end of the bent pipe;

step four: after the limiting is finished, a first electric guide rail at the bottom of the transfer mechanism drives the bent pipe to move to the front end of the left annular welding mechanism, and after the limiting is finished, a first hydraulic cylinder at the rear end of the straight pipe feeding table drives a push plate to extend out, the straight pipe to be positioned is pushed to the annular welding mechanism, and one end of the straight pipe is pressed against the butt joint end of the bent pipe;

step five: after the straight pipe and the bent pipe reach the welding site, a second electric guide rail on the inner wall of the annular welding mechanism is driven to reciprocate, meanwhile, a second hydraulic cylinder and an electric push rod run to drive the ultrasonic welding seam probe to move downwards to be attached to the pipeline, the position of the welding seam is identified, after the identification is finished, the electric push rod retracts to drive the ultrasonic welding seam probe to withdraw, and the second electric guide rail continues to drive the welding head to move to the welding seam site;

step six: by the operation of motor drive driving gear, with the rack toothing transmission on the ring welding mechanism inner ring frame, it rotates a week to drive the soldered connection, weld the department in succession of return bend and straight tube, the back that finishes, the hydraulic telescoping rod of transport mechanism upper end drives the gag lever post and contracts, the second cylinder of side drives splint and moves backward slightly simultaneously, only carry out the side spacing to the pipeline, later continue to drive the push pedal antedisplacement by first pneumatic cylinder, pass the pipeline that the welding was accomplished to blanking machine department, carry out the unloading to the pipeline, each mechanism resets after finishing, so reciprocal, accomplish vehicle vent pipe's weldment work in order.

Compared with the prior art, the invention has the beneficial effects that:

1. the welding process is completed by the annular welding mechanism, during welding, the bent pipe section is positioned by the pressing plates on the two sides of the transfer mechanism and the limiting rod at the rear end, the straight pipe is pressed and fixed with the bent pipe section through the push plate driven by hydraulic pressure, welding stability is guaranteed, during welding, the driving gear is driven by the motor to run, the driving gear is meshed with the rack on the inner ring frame of the annular welding mechanism for transmission, the welding head is driven to rotate for a circle, welding processing is performed on the connection part of the bent pipe and the straight pipe, in the process, the straight pipe and the bent pipe do not need to rotate, welding precision is guaranteed, the problem that when the existing device is used, the pipeline is positioned, the pipeline is driven to rotate, welding work is completed, and when the bent pipe is welded, the deflection range of the bent part of the pipeline is large, limitation exists, and processing is inconvenient.

2. Through setting up the return bend material loading machine, transport mechanism, straight tube material loading machine and unloader, the device moves in operation, place the elbow pipe portion and the straight tube portion of blast pipe on elbow pipe material loading machine and straight tube material loading machine respectively by manual work or manipulator, wherein, straight tube material loading machine step-by-step gos forward, carry the straight tube section to treating between two arc gib blocks and putting, elbow pipe material loading machine is external negative pressure mechanism then, rely on the negative pressure effect to stably shift the return bend to transport mechanism, later remove return bend and straight tube to annular welding machine structure department respectively by transport mechanism and push pedal, after the welding finishes, the push pedal continues to impel, can push the unloader with the pipeline that the welding finishes, go up the unloading transfer chain and set up side by side for two, space utilization is high, the whole area occupied by welding set has been reduced, and the unloading work of can be in good order completion, degree of automation is high, the problem of current welding set up unloading mechanism in advance has been solved, machining efficiency has been influenced.

3. Through set up by cylinder driven's netted limiting plate in return bend material loading machine and blanking machine both sides, utilize the pneumatic cylinder to connect the soldered connection simultaneously, the interval and the soldered connection of netted limiting plate and the distance of pipeline can be adjusted in a flexible way in the setting of cylinder and pneumatic cylinder for welding set has certain adjustability, is applicable to the welding of multiple different specification and dimension's vehicle vent-pipe, has improved the general purpose nature.

4. Through setting up the ultrasonic welding seam probe by electric putter control at the soldered connection rear end, after the pipeline got into welding range, the reciprocal drive of the second electric guide rail of annular welding mechanism inner wall, electric putter operation simultaneously drives ultrasonic welding seam probe and moves down, attaches firmly the pipeline, and the quick discernment welding seam position improves follow-up welding precision.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the elbow feeding and blanking machine of the present invention;

FIG. 3 is a schematic view of a partial structure of the elbow feeding and blanking machine of the present invention;

FIG. 4 is a schematic structural view of a bent pipe feeding table and an annular welding mechanism of the invention;

FIG. 5 is a schematic view of the internal structure of the circular welding mechanism of the present invention;

FIG. 6 is a schematic side view of a welding head according to the present invention;

FIG. 7 is a schematic structural view of a straight tube loading platform according to the present invention;

FIG. 8 is a schematic view of the bottom structure of the push plate of the present invention;

in the figure: 1. a bent pipe feeding machine; 2. a blanking machine; 3. a bent pipe feeding table; 4. an annular welding mechanism; 5. a straight pipe feeding table; 6. a straight pipe feeding machine; 7. a base; 8. connecting the bottom plate; 9. a conveyor belt; 10. a stepping motor; 11. a cylinder carrying platform; 12. a first cylinder; 13. a reticular limiting plate; 14. a first motorized rail; 15. a transfer mechanism; 16. a hydraulic cylinder mounting plate; 17. a first hydraulic cylinder; 18. pushing the plate; 181. a first ball bearing; 19. a first pulley; 20. a second pulley; 21. a negative pressure chamber partition; 22. a negative pressure chamber; 23. carrying rollers; 24. a separation block; 25. a negative pressure adsorption hole; 26. a negative pressure pipe joint; 27. a sliding bottom plate; 28. a second ball bearing; 29. a side support plate; 30. a second cylinder; 31. a splint; 32. a flexible rubber mat; 33. a top plate; 34. an extension plate; 35. a hydraulic telescopic rod; 36. a laser sensor; 37. an inner ring frame; 38. a rack; 39. a bearing; 40. a gear chamber; 41. a driving gear; 42. a second motorized rail; 43. a second hydraulic cylinder; 44. welding a head; 45. a support plate; 46. an electric push rod; 47. a spring; 48. a damping lever; 49. an ultrasonic weld joint probe; 50. an arc-shaped guide strip; 51. and (6) a guide pillar.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-8, an embodiment of the present invention: an adjustable welding device for an automobile exhaust pipe comprises an annular welding mechanism 4;

further comprising:

a straight pipe feeding platform 5 arranged at the rear end of the annular welding mechanism 4, wherein a straight pipe feeding machine 6 is arranged on one side of the straight pipe feeding platform 5;

the bent pipe feeding table 3 is arranged at the front end of the annular welding mechanism 4, and a first electric guide rail 14 is embedded in the bent pipe feeding table 3;

a transfer mechanism 15 mounted on the slider of the first motor rail 14;

the elbow feeding machine 1 is arranged on one side of the front end of the elbow feeding table 3;

the blanking machine 2 is arranged on the other side of the front end of the elbow feeding table 3, the bases 7 are arranged at the lower ends of the elbow feeding machine 1 and the blanking machine 2, and the bases 7 are fixedly connected through a connecting bottom plate 8.

Referring to fig. 1, two ends of two sides of the elbow feeding machine 1 and the blanking machine 2 are both provided with an air cylinder carrier 11, the upper end of the air cylinder carrier 11 is provided with a first air cylinder 12, the output end of the first air cylinder 12 is provided with a mesh limiting plate 13, and the first air cylinder 12 can adjust the distance between the mesh limiting plates 13 through the telescopic action to adapt to conveying work of elbows of different specifications.

Referring to fig. 1 and 2, a first belt pulley 19 is installed at one end inside each of a bent pipe feeding machine 1 and a bent pipe blanking machine 2, a second belt pulley 20 is installed at the other end inside each of the bent pipe feeding machine 1 and the bent pipe blanking machine 2, the first belt pulley 19 is in transmission connection with the second belt pulley 20 through a conveying belt 9, partition blocks 24 are arranged outside the conveying belt 9 at equal intervals, the partition blocks 24 and the conveying belt 9 are integrally formed, a stepping motor 10 is installed on the outer wall of one end of each of the bent pipe feeding machine 1 and the bent pipe blanking machine 2, the output end of the stepping motor 10 is in transmission connection with the first belt pulley 19, and the partition blocks 24 are arranged.

Referring to fig. 2 and 3, a plurality of negative pressure adsorption holes 25 are formed in the outer wall of the conveying belt 9, negative pressure chamber partition plates 21 are installed inside the elbow feeding machine 1 and the elbow discharging machine 2, a negative pressure cavity 22 is formed between the negative pressure chamber partition plates 21 and the conveying belt 9, a carrier roller 23 is arranged inside the negative pressure cavity 22, negative pressure pipe joints 26 are arranged on one sides of the elbow feeding machine 1 and the elbow discharging machine 2, the number of the negative pressure pipe joints 26 is three, the carrier roller 23 guarantees the bearing capacity of the conveying belt 9, the negative pressure cavity 22 is formed inside the elbow feeding machine, negative pressure equipment can be connected with the plurality of negative pressure pipe joints 26 externally, the negative pressure cavity 22 can uniformly generate negative pressure, the bottoms of the elbows can be adsorbed in the conveying process by using the plurality of negative pressure adsorption holes 25 in the conveying belt 9, and conveying stability is guaranteed.

Referring to fig. 4, the transfer mechanism 15 includes a sliding bottom plate 27, side supporting plates 29 and a top plate 33, the sliding bottom plate 27 is installed on a sliding block of the first electric guide rail 14, the side supporting plates 29 are installed on two sides of the upper end of the sliding bottom plate 27, the top plate 33 is installed on the upper end of the side supporting plates 29, second cylinders 30 are installed on outer walls of the side supporting plates 29 on two sides, output ends of the second cylinders 30 penetrate through and extend to the inside of the side supporting plates 29, clamping plates 31 are installed, flexible rubber pads 32 are arranged on outer walls of the clamping plates 31, a plurality of second balls 28 are arranged on upper surfaces of the sliding bottom plate 27, the transfer mechanism 15 can receive bent pipes on the bent pipe feeding machine 1, the second cylinders 30 on two sides can be driven to extend out after receiving, the bent pipes are positioned by using the clamping plates 31, stability of movement and subsequent welding is ensured, and the flexible rubber pads 32 on outer walls of the clamping plates 31 can avoid abrasion to outer walls of the pipelines.

Referring to fig. 4, an extension plate 34 is disposed at the rear end of the top plate 33, a hydraulic telescopic rod 35 is installed at the upper end of the extension plate 34, an output end of the hydraulic telescopic rod 35 penetrates through the lower end of the extension plate 34 and is provided with a limiting rod, a laser sensor 36 is installed below the rear end of the extension plate 34, the laser sensor 36 can detect that a pipeline approaches, when the pipeline is separated from the detection range of the laser sensor 36, the transfer mechanism 15 is represented to smoothly carry a bent pipe, and at this time, the laser sensor 36 sends a signal to a controller to drive the limiting mechanism to operate.

Referring to fig. 7, a hydraulic cylinder mounting plate 16 is mounted at the rear end of a straight pipe feeding table 5, a first hydraulic cylinder 17 is mounted at the rear end of the hydraulic cylinder mounting plate 16, an output end of the first hydraulic cylinder 17 penetrates and extends to the front end of the hydraulic cylinder mounting plate 16, and a push plate 18 is mounted, a plurality of first balls 181 are mounted on the lower surface of the push plate 18, arc-shaped guide strips 50 are arranged on both sides of the upper surface of the straight pipe feeding table 5, a guide pillar 51 is mounted below the rear end of the push plate 18, one end of the guide pillar 51 penetrates and extends to the outside of the hydraulic cylinder mounting plate 16, a straight pipe portion is conveyed to a position between two arc-shaped guide strips 50 on the surface of the straight pipe feeding table 5 by a straight pipe feeding machine 6, the first hydraulic cylinder 17 can drive the push plate 18 to move forward, a straight pipe between the arc-shaped guide strips 50 is pushed to an annular welding mechanism 4, and the first balls 181 at the bottom of the push plate 18 and the guide pillar 51 at the rear end both improve the stability of the moving process.

Referring to fig. 5, an inner ring frame 37 is disposed inside the circular welding mechanism 4, a bearing 39 is disposed at a joint of the inner ring frame 37 and the circular welding mechanism 4, a rack 38 is disposed on an outer wall of the inner ring frame 37, a gear chamber 40 is disposed on one side of the circular welding mechanism 4, a driving gear 41 is disposed inside the gear chamber 40, the driving gear 41 is engaged with the rack 38 on the outer wall of the inner ring frame 37 for transmission, a second electric guide rail 42 is disposed on an inner wall of the inner ring frame 37, a second hydraulic cylinder 43 is disposed at an output end of the second electric guide rail 42, and a welding head 44 is disposed at an output end of the second hydraulic cylinder 43.

Referring to fig. 6, a supporting plate 45 is installed at a connection position between an output end of the second hydraulic cylinder 43 and the welding head 44, an electric push rod 46 is installed above a rear end of the supporting plate 45, a spring 47 is installed at an output end of the electric push rod 46, a damping rod 48 is installed inside the spring 47, an ultrasonic welding seam probe 49 is installed at one end of the spring 47, the electric push rod 46 can drive the ultrasonic welding seam probe 49 to move down to identify a welding seam, and the spring 47 and the damping rod 48 at the upper end of the ultrasonic welding seam probe 49 have a certain expansion space so as to be attached to a pipeline wall more tightly.

Referring to fig. 1 to 8, a welding method of an adjustable welding device for an exhaust pipe of an automobile includes the following steps:

the method comprises the following steps: placing the bent pipe part and the straight pipe part of the exhaust pipe on a bent pipe feeding machine 1 and a straight pipe feeding machine 6 respectively by manpower or a manipulator, leaning the bent part of each bent pipe on a separating block 24 of a conveying belt 9 when feeding the bent pipes, and driving reticular limiting plates 13 at two sides of the bent pipe feeding machine 1 to extend out to limit the bent pipes;

step two: during conveying, the straight pipe feeding machine 6 moves forward step by step, a section of straight pipe is conveyed to a position between the two arc-shaped guide strips 50 to be reserved, the bent pipe feeding machine 1 is externally connected with a negative pressure mechanism, so that the internal negative pressure cavity 22 generates negative pressure, the bent pipe is adsorbed through the negative pressure adsorption hole 25 on the conveying belt 9, and when the bent pipe reaches the edge of the conveying belt 9, the bent pipe is separated from the range of the negative pressure cavity 22, is continuously conveyed forward and moves to the transfer mechanism 15;

step three: when the bent pipe is transferred onto the transfer mechanism 15, the laser sensor 36 at the rear end of the mechanism can detect that the pipe approaches, when the pipe is out of the detection range of the laser sensor 36, the transfer mechanism 15 is represented to smoothly carry the bent pipe, at the moment, the laser sensor 36 sends a signal to the controller, the second cylinders 30 at the two sides of the driving mechanism and the hydraulic telescopic rods 35 at the top of the driving mechanism run, the second cylinders 30 drive the clamping plates 31 to extend out to clamp the bent pipe, and the hydraulic telescopic rods 35 drive the limiting rods to extend out to limit the rear end of the bent pipe;

step four: after the limiting is finished, a first electric guide rail 14 at the bottom of the transfer mechanism 15 is driven to drive the bent pipe to move to the front end of the left annular welding mechanism 4, and after the limiting is finished, a first hydraulic cylinder 17 at the rear end of the straight pipe feeding table 5 is driven to drive a push plate 18 to extend out, so that the straight pipe to be positioned is pushed to the annular welding mechanism 4, and one end of the straight pipe is pressed against the butt joint end of the bent pipe;

step five: after the straight pipe and the bent pipe reach the welding site, the second electric guide rail 42 on the inner wall of the annular welding mechanism 4 is driven to reciprocate, meanwhile, the second hydraulic cylinder 43 and the electric push rod 46 operate to drive the ultrasonic welding seam probe 49 to move downwards to attach to the pipeline, the welding seam position is identified, after the identification is finished, the electric push rod 46 retracts to drive the ultrasonic welding seam probe 49 to withdraw, and the second electric guide rail 42 continues to drive the welding head 44 to move to the welding seam site;

step six: the driving gear 41 is driven by a motor to run and is meshed with the rack 38 on the inner ring frame 37 of the annular welding mechanism 4 for transmission, a welding head 44 is driven to rotate for a circle, the joint of the bent pipe and the straight pipe is welded, after the welding is finished, the hydraulic telescopic rod 35 at the upper end of the transfer mechanism 15 drives the limiting rod to retract, meanwhile, the second cylinder 30 at the side edge drives the clamping plate 31 to slightly move backwards, the side edge limiting is only carried out on the pipe, then, the first hydraulic cylinder 17 continues to drive the push plate 18 to move forwards, the welded pipe is pushed to the blanking machine 2, the pipe is blanked, after the welding is finished, all mechanisms reset, the operation is repeated, and the welding work of the automobile exhaust pipe is orderly finished.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. An adjustable welding device for an automobile exhaust pipe comprises an annular welding mechanism (4);

the method is characterized in that: further comprising:

a straight pipe feeding platform (5) arranged at the rear end of the annular welding mechanism (4), wherein a straight pipe feeding machine (6) is arranged on one side of the straight pipe feeding platform (5);

the bent pipe feeding table (3) is arranged at the front end of the annular welding mechanism (4), and a first electric guide rail (14) is embedded in the bent pipe feeding table (3);

a transfer mechanism (15) mounted on a slide of the first motorized rail (14);

the bent pipe feeding machine (1) is arranged on one side of the front end of the bent pipe feeding table (3);

blanking machine (2), it is installed the opposite side of return bend material loading platform (3) front end, base (7) are all installed to the lower extreme of return bend material loading machine (1) and blanking machine (2), through connecting bottom plate (8) fixed connection between base (7).

2. The adjustable welding device for the automobile exhaust pipe according to claim 1, characterized in that: air cylinder carrying platforms (11) are installed at two ends of two sides of the elbow feeding machine (1) and the blanking machine (2), first air cylinders (12) are installed at the upper ends of the air cylinder carrying platforms (11), and meshed limiting plates (13) are installed at the output ends of the first air cylinders (12).

3. The adjustable welding device for the automobile exhaust pipe according to claim 2, characterized in that: first belt pulley (19) are all installed to the inside one end of return bend material loading machine (1) and unloading machine (2), second belt pulley (20) are all installed to the inside other end of return bend material loading machine (1) and unloading machine (2), first belt pulley (19) are connected with second belt pulley (20) transmission through conveyor belt (9), the outside equidistance of conveyor belt (9) is provided with and separates piece (24), and separates piece (24) and conveyor belt (9) integrated into one piece setting, all install step motor (10) on the outer wall of return bend material loading machine (1) and unloading machine (2) one end, and the output and the first belt pulley (19) transmission of step motor (10) are connected.

4. The adjustable welding device for the automobile exhaust pipe according to claim 3, wherein: be provided with a plurality of negative pressure on the outer wall of conveyor belt (9) and adsorb hole (25), the internally mounted of return bend material loading machine (1) and unloader (2) has negative pressure chamber baffle (21), be provided with negative pressure chamber (22) between negative pressure chamber baffle (21) and conveyor belt (9), the inside in negative pressure chamber (22) is provided with bearing roller (23), one side of return bend material loading machine (1) and unloader (2) all is provided with negative pressure union coupling (26), and negative pressure union coupling (26) is provided with threely.

5. The adjustable welding device for the automobile exhaust pipe according to claim 4, characterized in that: transport mechanism (15) include sliding bottom (27), collateral branch board (29) and roof (33), sliding bottom (27) are installed on the slider of first electronic guide rail (14), the both sides at sliding bottom (27) upper end are installed in side extension board (29), the upper end at side extension board (29), both sides are installed in roof (33) all install second cylinder (30) on the outer wall of side extension board (29), the output of second cylinder (30) runs through and extends to the inside of side extension board (29), and installs splint (31), be provided with flexible cushion (32) on the outer wall of splint (31), the upper surface of sliding bottom (27) is provided with a plurality of second ball (28).

6. The adjustable welding device for the automobile exhaust pipe according to claim 5, wherein: the rear end of roof (33) is provided with extension board (34), hydraulic telescoping rod (35) are installed to the upper end of extension board (34), and hydraulic telescoping rod (35)'s output runs through to the lower extreme of extension board (34), and installs the gag lever post, laser sensor (36) are installed to the below of extension board (34) rear end.

7. The adjustable welding device for the automobile exhaust pipe according to claim 6, wherein: pneumatic cylinder mounting panel (16) are installed to the rear end of straight tube material loading platform (5), first pneumatic cylinder (17) are installed to the rear end of pneumatic cylinder mounting panel (16), the output of first pneumatic cylinder (17) runs through and extends to the front end of pneumatic cylinder mounting panel (16), and installs push pedal (18), a plurality of first balls (181) are installed to the lower surface of push pedal (18), the both sides of straight tube material loading platform (5) upper surface all are provided with arc gib block (50), guide pillar (51) are installed to the below of push pedal (18) rear end, and the one end of guide pillar (51) runs through and extends to the outside of pneumatic cylinder mounting panel (16).

8. The adjustable welding device for the automobile exhaust pipe according to claim 7, characterized in that: the utility model discloses an electronic welding mechanism, including annular welding mechanism (4), gear chamber (40) are installed to the junction of annular welding mechanism (4), the inside of annular welding mechanism (4) is provided with interior ring holder (37), be provided with rack (38) on the outer wall of interior ring holder (37), gear chamber (40) are installed to one side of annular welding mechanism (4), the internally mounted of gear chamber (40) has driving gear (41), and driving gear (41) and rack (38) meshing transmission of interior ring holder (37) outer wall are connected, install electronic guide rail (42) of second on the inner wall of interior ring holder (37), install second hydraulic cylinder (43) on the output of electronic guide rail of second (42), install soldered connection (44) on the output of second hydraulic cylinder (43).

9. The adjustable welding device for the exhaust pipe of the automobile according to claim 8, wherein: a supporting plate (45) is installed at the joint of the output end of the second hydraulic cylinder (43) and the welding head (44), an electric push rod (46) is installed above the rear end of the supporting plate (45), a spring (47) is installed at the output end of the electric push rod (46), a damping rod (48) is installed inside the spring (47), and an ultrasonic welding seam probe (49) is installed at one end of the spring (47).

10. The welding method of the adjustable welding device for the automobile exhaust pipe according to claim 9, characterized by comprising the following steps:

the method comprises the following steps: the bent pipe part and the straight pipe part of the exhaust pipe are respectively placed on a bent pipe feeding machine (1) and a straight pipe feeding machine (6) by manpower or a mechanical hand, and when the bent pipes are fed, the bent part of each bent pipe leans against a separation block (24) of a conveying belt (9), and mesh limiting plates (13) on two sides of the bent pipe feeding machine (1) are driven to extend out to limit the bent pipes;

step two: during conveying, the straight pipe feeding machine (6) advances in a stepping mode, a section of straight pipe is conveyed to a position between the two arc-shaped guide strips (50) and then stands by, the bent pipe feeding machine (1) is externally connected with a negative pressure mechanism, so that a negative pressure cavity (22) in the bent pipe generates negative pressure, the bent pipe is adsorbed through a negative pressure adsorption hole (25) in the conveying belt (9), when the bent pipe reaches the edge of the conveying belt (9), the bent pipe is separated from the range of the negative pressure cavity (22), and the bent pipe is continuously conveyed forwards and moves to the transfer mechanism (15);

step three: when the bent pipe is transferred to the transfer mechanism (15), the laser sensor (36) at the rear end of the mechanism can detect that the pipe is close to the transfer mechanism, when the pipe is separated from the detection range of the laser sensor (36), the transfer mechanism (15) is represented to smoothly carry the bent pipe, the laser sensor (36) sends signals to the controller at the moment, the second cylinders (30) at the two sides of the driving mechanism and the hydraulic telescopic rods (35) at the top of the driving mechanism run, the clamping plates (31) are driven by the second cylinders (30) to extend out, the bent pipe is clamped by the clamping bags, the hydraulic telescopic rods (35) drive the limiting rods to extend out, and the rear end of the bent pipe is limited;

step four: after the limiting is finished, a first electric guide rail (14) at the bottom of the transfer mechanism (15) drives the bent pipe to move to the front end of the annular welding mechanism (4) on the left side, and after the limiting is finished, a first hydraulic cylinder (17) at the rear end of the straight pipe feeding platform (5) drives a push plate (18) to extend out, so that the straight pipe to be positioned is pushed to the annular welding mechanism (4), and one end of the straight pipe is abutted against the butt joint end of the bent pipe;

step five: after the straight pipe and the bent pipe reach a welding site, a second electric guide rail (42) on the inner wall of the annular welding mechanism (4) is driven to reciprocate, meanwhile, a second hydraulic cylinder (43) and an electric push rod (46) run to drive an ultrasonic welding seam probe (49) to move downwards to attach to a pipeline, the position of a welding seam is identified, after the identification is finished, the electric push rod (46) retracts to drive the ultrasonic welding seam probe (49) to withdraw, the second electric guide rail (42) continues to drive, and a welding head (44) is driven to move to the welding seam site;

step six: the automobile exhaust pipe welding device is characterized in that a driving gear (41) is driven by a motor to run, the driving gear and a rack (38) on an inner ring frame (37) of an annular welding mechanism (4) are meshed for transmission, a welding head (44) is driven to rotate for a circle, welding treatment is carried out on the joint of a bent pipe and a straight pipe, after the completion, a hydraulic telescopic rod (35) at the upper end of a transfer mechanism (15) drives a limiting rod to retract, meanwhile, a second cylinder (30) at the side edge drives a clamping plate (31) to slightly move backwards, the side edge limiting is only carried out on a pipeline, then a push plate (18) is continuously driven by a first hydraulic cylinder (17) to move forwards, the pipeline which is welded is pushed to a blanking machine (2), the pipeline is blanked, each mechanism is reset after the completion, the reciprocating is carried out, and the welding work of the automobile exhaust pipe is orderly completed.

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