CN110814474B

CN110814474B - Working method of argon arc welding machine for assembling liquid accumulator and aluminum pipe of evaporator

Info

Publication number: CN110814474B
Application number: CN201911139016.XA
Authority: CN
Inventors: 刘丽; 赵玉真; 栾方
Original assignee: Wushan Pingyou Motor Vehicle Testing Co ltd
Current assignee: Wushan Pingyou motor vehicle testing Co.,Ltd.
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2021-12-14
Anticipated expiration: 2039-11-20
Also published as: CN110814474A

Abstract

The invention relates to the technical field of argon arc welding machines, in particular to a working method of an argon arc welding machine for assembling a liquid storage device and an aluminum pipe of an evaporator, and solves the problems that the evaporator is not stably fixed, the welding effect is poor when the evaporator is welded, and welding spot leakage is easy to occur after welding in the prior art. The utility model provides an argon arc welding machine that reservoir and aluminum pipe assembly of evaporimeter were used, includes the mounting bracket, gear motor is installed at the top of mounting bracket, the top of mounting bracket is equipped with the workstation with gear motor fixed connection, one side of workstation is equipped with positioning mechanism, the top of mounting bracket is equipped with clamping mechanism, one side of clamping mechanism be equipped with mounting bracket fixed connection's welding mechanism, one side of welding mechanism is equipped with wire feeding mechanism. According to the invention, stable clamping during welding of the evaporator is realized through the workbench and the positioning mechanism, the welding quality of the evaporator is improved, and welding spots are not easy to leak.

Description

Working method of argon arc welding machine for assembling liquid accumulator and aluminum pipe of evaporator

Technical Field

The invention relates to the technical field of argon arc welding machines, in particular to a working method of an argon arc welding machine for assembling a liquid accumulator and an aluminum pipe of an evaporator.

Background

The argon arc welding machine is a machine using argon arc welding, adopts a high-voltage breakdown arc starting mode, namely tungsten electrode inert gas shielded arc welding, and refers to a welding method using industrial tungsten or active tungsten as an infusible electrode and inert gas (argon) as protection, an evaporator is a main component in four refrigeration parts, low-temperature condensed liquid passes through the evaporator to exchange heat with the outside air, and the vapor is gasified to absorb heat to achieve the refrigeration effect; the liquid accumulator is an important component of the compressor, plays roles of storage, gas-liquid separation, filtration, noise reduction and refrigerant buffering, and comprises a cylinder, an air inlet pipe, an air outlet pipe and other parts.

When welding evaporimeter aluminum pipe and reservoir subassembly, current argon arc welding machine uses automatic argon arc welding machine, like CN105171203B, current automatic argon arc welding machine is when the welding, at first spacing the evaporimeter aluminum pipe, current evaporimeter aluminum pipe is when spacing, use the clamp plate directly to push down, the bottom uses adjustable layer board to hold, it is spacing with the reservoir subassembly again, then weld after the butt joint, however, when using clamp plate and layer board evaporimeter spacing, spacing effect is relatively poor, the evaporimeter aluminum pipe can take place to rock when the welding, it is not stable enough to fix the evaporimeter, welding effect is relatively poor when leading to the evaporimeter welding, welding spot's leakage after the welding appears easily, and the temperature of welding point is too high, artifical getting and putting is inconvenient.

Disclosure of Invention

The invention aims to provide an argon arc welding machine for assembling a liquid accumulator and an aluminum pipe of an evaporator, which solves the problems that when a pressure plate and a supporting plate evaporator are used for limiting in the prior art, the limiting effect is poor, the aluminum pipe of the evaporator can shake during welding, the evaporator is not stably fixed enough, the welding effect is poor during welding of the evaporator, welding spots are easy to leak after welding, the temperature of the welding spots is too high, and manual taking and placing are inconvenient.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an argon arc welding machine that reservoir and aluminum pipe assembly of evaporimeter were used, includes the mounting bracket, gear motor is installed at the top of mounting bracket, the top of mounting bracket is equipped with the workstation with gear motor fixed connection, one side of workstation is equipped with positioning mechanism, the top of mounting bracket is equipped with clamping mechanism, one side of clamping mechanism be equipped with mounting bracket fixed connection's welding mechanism, one side of welding mechanism is equipped with wire feeding mechanism.

Preferably, the workstation is including placing the board, the bottom of placing the board is equipped with revolving cylinder, revolving cylinder's the spacing post of output fixedly connected with, the surface cover of spacing post is equipped with the cardboard, the bottom of placing the board is equipped with two ejection mechanism that are symmetric distribution, ejection mechanism's opposite face is equipped with holding down plate A and holding down plate B respectively, revolving cylinder's output pot head is equipped with spacing subassembly, spacing subassembly includes limiting plate A and limiting plate B, works as limiting plate A rotates when extremely, holding down plate A slides down, works as limiting plate B rotates when extremely, holding down plate B pushes down, the inside of placing the board is worn to be equipped with the accessory plate, be connected through the connecting plate between accessory plate and one of them ejection mechanism.

Preferably, the ejection mechanism comprises an ejection housing, an ejection plate is slidably connected inside the ejection housing, a screw is fixedly connected to the top of the ejection plate, a threaded sleeve in threaded connection with the screw is arranged inside the placement plate in a penetrating manner, and a top plate is fixedly connected to the top of the threaded sleeve.

Preferably, a return spring is arranged between the bottom of the inner wall of the ejection shell and the ejection plate, and two ends of the return spring are respectively and fixedly connected with the ejection shell and the ejection plate.

Preferably, the positioning mechanism comprises an ejection cylinder fixed on the workbench, the output end of the ejection cylinder is fixedly connected with a locking plate, the bottom of the placing plate is fixedly connected with a positioning cylinder, one side of the auxiliary plate, which is far away from the locking plate, is provided with a positioning plate penetrating through the inside of the placing plate, and the bottom of the positioning plate is fixedly connected with the output end of the positioning cylinder.

Preferably, the clamping mechanism comprises a clamping sliding plate arranged at the top of the mounting frame, a clamping cylinder is arranged at the top of the clamping sliding plate, and a limiting seat in sliding connection with the clamping sliding plate is arranged at the output end of the clamping cylinder.

Preferably, welding mechanism includes four welding support frames with mounting bracket fixed connection, the top fixedly connected with welding mounting panel of welding support frame, the bottom fixedly connected with welding cylinder of welding mounting panel, welding cylinder's bottom fixedly connected with welding connection frame, welder wears to be equipped with in welding connection frame's inside, welder's top is equipped with the intake pipe.

Preferably, the wire feeding mechanism comprises a placing disc rotatably connected with the mounting frame, welding wires are wound on the surface of the placing disc, a wire feeding wheel A and a wire feeding wheel B are arranged on one side of the welding connection frame, and the wire feeding wheel A and the wire feeding wheel B are respectively in contact with the welding wires.

Preferably, be equipped with drive mechanism between gear motor and the thread feeding mechanism, drive mechanism includes the action wheel with the free end fixed connection of gear motor output shaft, one side of mounting bracket is equipped with from the driving wheel, be connected through belt transmission between follow driving wheel and the action wheel, thread feeding wheel A is connected through the transmission shaft from between the driving wheel.

The invention has at least the following beneficial effects:

firstly, an evaporator aluminum pipe (not shown) is clamped and positioned through a workbench and a positioning mechanism, the clamping mechanism limits a liquid storage device assembly (not shown) and the evaporator aluminum pipe (not shown), a welding mechanism welds a joint, a wire feeding mechanism feeds welding wires to the welding mechanism, compared with the prior art, the fixation of the evaporator is not stable enough, which causes poor welding effect during the welding of the evaporator and easy leakage of welding spots after welding, and the temperature of the welding point is too high, the manual taking and placing are inconvenient, the proposal realizes the stable clamping of the evaporator during the welding through the workbench and the positioning mechanism, improves the welding quality of the evaporator, ensures that the welding point is not easy to leak, and when the evaporator is taken off from the workbench after welding, the top plate at the bottom can slide relatively, so that the evaporator can be taken off from the workbench directly, manual operation is facilitated more, and safety of workers is protected.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is an overall three-dimensional view of the present invention;

FIG. 2 is a block diagram of the table and positioning mechanism of the present invention;

FIG. 3 is a partial bottom view of FIG. 2;

FIG. 4 is a partial view of the present invention;

fig. 5 is a partial back view of the present invention.

In the figure: 1. a mounting frame; 2. a reduction motor; 3. a work table; 30. placing the plate; 31. a rotating cylinder; 32. a limiting component; 320. a limiting plate A; 321. a limiting plate B; 33. an ejection mechanism; 330. ejecting the shell; 331. ejecting the plate; 332. a screw; 333. a threaded sleeve; 334. a top plate; 335. a return spring; 34. a lower pressing plate A; 35. a lower pressing plate B; 36. a connecting plate; 37. an auxiliary plate; 38. a limiting column; 39. clamping a plate; 4. a clamping mechanism; 40. clamping the sliding plate; 41. a clamping cylinder; 42. a limiting seat; 5. a welding mechanism; 50. welding a support frame; 51. welding the mounting plate; 52. welding the cylinder; 53. welding the connecting frame; 54. an air inlet pipe; 55. a welding gun; 6. a wire feeder; 60. placing a tray; 61. welding wires; 62. a wire feeding wheel A; 63. a wire feeding wheel B; 7. a transmission mechanism; 70. a driving wheel; 71. a driven wheel; 72. a belt; 73. a drive shaft; 8. a positioning mechanism; 80. ejecting out the cylinder; 81. a locking plate; 82. positioning the air cylinder; 83. and (7) positioning the plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, 2, 3 and 4, in a first embodiment, an argon arc welding machine for assembling a liquid accumulator and an aluminum pipe of an evaporator comprises a mounting frame 1, a speed reducing motor 2 is mounted at the top of the mounting frame 1, specifically, the mounting frame 1 is detachably connected with the speed reducing motor 2 through a bolt, the speed reducing motor 2 is a speed reducing motor 2 of a worm-in-wheat RXFS37 model, a workbench 3 fixedly connected with the speed reducing motor 2 is arranged above the mounting frame 1, specifically, an evaporator aluminum pipe (not shown) to be welded is placed on the workbench 3, a positioning mechanism 8 for positioning the aluminum pipe (not shown) is arranged on one side of the workbench 3, specifically, the positioning mechanism 8 is fixedly connected with the workbench 3, a clamping mechanism 4 for clamping the liquid accumulator assembly (not shown) is arranged at the top of the mounting frame 1, specifically, the clamping mechanism 4 is fixedly connected with the mounting frame 1, one side of clamping mechanism 4 is equipped with mounting bracket 1 fixed connection's welding mechanism 5, and is concrete, and welding mechanism 5 is used for fixed welder 55, one side of welding mechanism 5 is equipped with wire drive feed mechanism 6, and is concrete, wire drive feed mechanism 6 and mounting bracket 1 fixed connection, when wire drive feed mechanism 6 is used for the welding, carry welding wire 61.

Further, the workbench 3 comprises a placing plate 30, a rotary cylinder 31 is arranged at the bottom of the placing plate 30, specifically, the rotary cylinder 31 is fixedly connected with the placing plate 30, an output end of the rotary cylinder 31 is fixedly connected with a limiting column 38, specifically, the limiting column 38 is positioned at the side surface of the placing plate 30, a clamping plate 39 is sleeved on the surface of the limiting column 38, specifically, the clamping plate 39 is detachably connected with the limiting column 38 through a bolt, the clamping plate 39 can be adjusted up and down relative to the limiting column 38, two ejection mechanisms 33 which are symmetrically distributed are arranged at the bottom of the placing plate 30, specifically, the ejection mechanisms 33 provide a supporting effect for welding of an aluminum tube evaporator (not shown), a lower pressing plate a34 and a lower pressing plate B35 are respectively arranged on opposite surfaces of the ejection mechanisms 33, a limiting component 32 is sleeved at the output end of the rotary cylinder 31, specifically, the limiting component 32 is fixedly connected with the output end of the rotary cylinder 31, the limiting assembly 32 comprises a limiting plate A320 and a limiting plate B321, when the limiting plate A320 rotates 0 to 90 degrees, the lower pressing plate A34 slides downwards, specifically, the rotation of the limiting plate A320 drives the lower pressing plate A34 to be stable, so that the aluminum tube of the evaporator is placed more stably, when the limiting plate B321 rotates by 0 to 90 degrees, the lower pressing plate B35 presses downwards, specifically, the rotation of the limiting plate B321 drives the lower pressing plate B35 to be stable, so that the aluminum tube of the evaporator is placed more stably, an auxiliary plate 37 is arranged inside the placing plate 30 in a penetrating manner, specifically, the auxiliary plate 37 is connected with the placing plate 30 in a sliding manner, a placing groove for placing an aluminum pipe (not shown) conveniently is formed in the surface of the auxiliary plate 37, the auxiliary plate 37 assists in placing the aluminum pipe (not shown), the auxiliary plate 37 is connected with one of the ejection mechanisms 33 through a connecting plate 36, and in particular, the ejection mechanism 33 can drive the auxiliary plate 37 to descend and ascend.

Further, the ejection mechanism 33 includes an ejection housing 330, specifically, the ejection housing 330 is fixedly connected to the bottom of the placement plate 30, the ejection plate 331 is slidably connected to the inside of the ejection housing 330, the screw 332 is fixedly connected to the top of the ejection plate 331, a threaded sleeve 333 in threaded connection with the screw 332 is inserted into the inside of the placement plate 30, specifically, the surface of the screw 332 is provided with external threads, the inside of the threaded sleeve 333 is provided with internal threads matched with the external threads, and the top of the threaded sleeve 333 is fixedly connected to a top plate 334.

Further, the positioning mechanism 8 comprises an ejecting cylinder 80 fixed on the workbench 3, specifically, the ejecting cylinder 80 is connected to the top of the placing plate 30 through a plate, the output end of the ejecting cylinder 80 is fixedly connected with a locking plate 81, specifically, the locking plate 81 is located on the side surface of the auxiliary plate 37, the surface of the locking plate 81 is provided with a clamping groove perpendicular to the placing groove, the aluminum tube (not shown) is positioned in two directions through the locking plate 81 and the auxiliary plate 37, the stability of the aluminum tube (not shown) is ensured, the bottom of the placing plate 30 is fixedly connected with a positioning cylinder 82, one side of the auxiliary plate 37 away from the locking plate 81 is provided with a positioning plate 83 penetrating through the inside of the placing plate 30, specifically, the positioning plate 83 is connected with the placing plate 30 in a sliding manner, the height of the positioning plate 83 is higher than the center of the placing groove, the positioning plate 83 is used for positioning the aluminum tube (not shown) before welding, the bottom of the positioning plate 83 is fixedly connected with the output end of the positioning cylinder 82.

Further, clamping mechanism 4 is including installing in the tight slide 40 of clamp at the top of mounting bracket 1, and is concrete, presss from both sides between tight slide 40 and the mounting bracket 1 and can dismantle through the bolt and be connected, and the mounting bracket 1 is located the bottom that presss from both sides tight slide 40 and is equipped with the spout, conveniently presss from both sides tight slide 40 and at the installation at mounting bracket 1 top, the top that presss from both sides tight slide 40 is equipped with die clamping cylinder 41, die clamping cylinder 41's output is equipped with and presss from both sides tight slide 40 sliding connection's spacing seat 42, and is concrete, and the inside of spacing seat 42 is equipped with the bell jar for install the reservoir (not seen).

Further, welding mechanism 5 includes four welding support frames 50 with mounting bracket 1 fixed connection, welding support frame 50's top fixedly connected with welding mounting panel 51, it is concrete, welding mounting panel 51 passes through the bolt with welding support frame 50 and can dismantle and be connected, welding mounting panel 51's bottom fixedly connected with welding cylinder 52, welding cylinder 52's bottom fixedly connected with welding connection frame 53, welding gun 55 is worn to be equipped with in welding connection frame 53's inside, and is concrete, welding gun 55 and welding connection frame 53 fixed connection, welding gun 55's top is equipped with intake pipe 54, and is concrete, intake pipe 54 and welding gun 55 fixed connection, intake pipe 54 and the inside intercommunication of welding gun 55, and intake pipe 54 provides argon gas.

Further, wire feeder 6 includes and rotates the dish 60 of placing of being connected with mounting bracket 1, the surface of placing dish 60 is around being equipped with welding wire 61, one side of welded connection frame 53 is equipped with wire feeding wheel A62 and wire feeding wheel B63, wire feeding wheel A62 and wire feeding wheel B63 contact with welding wire 61 respectively, and is concrete, and wire feeding wheel A62 and wire feeding wheel B63 all press from both sides tight welding wire 61, make things convenient for the conveying of welding wire 61.

The scheme has the following working processes:

firstly, rotating a top plate 334, the top plate 334 drives a threaded sleeve 333 to rotate, the threaded sleeve 333 is lifted and lowered to adjust the height to facilitate welding, an evaporator aluminum tube is placed on the top of a placing plate 30, a positioning cylinder 82 is started, the positioning cylinder 82 is ejected, a positioning plate 83 is ejected, the welding end of the evaporator aluminum tube (not shown) is placed in a placing groove of an auxiliary plate 37, the welding end abuts against the positioning plate 83, a rotating cylinder 31 is started, the rotating cylinder 31 drives a limiting column 38 to rotate 90 degrees, the limiting column 38 drives a clamping plate 39 to rotate 90 degrees, the rotating cylinder 31 drives a limiting plate A320 and a limiting plate B321 to synchronously rotate, the limiting plate A320 and the limiting plate B321 are respectively inserted into the tops of a lower pressing plate A34 and a lower pressing plate B35 to stabilize the state of the top plate 334, the top plate 334 and the clamping plate 39 clamp the evaporator aluminum tube, an ejection cylinder 80 is started, a locking plate 81 is ejected, a clamping groove of the locking plate 81 and a placing groove of the auxiliary plate 37 clamp the welding end, at the moment, the positioning cylinder 82 retracts, the positioning plate 83 descends, and the positioning of the aluminum pipe of the whole evaporator is completed;

secondly, rotating a bolt at the top of the clamping sliding plate 40, loosening the clamping sliding, adjusting the clamping sliding plate 40 to a welding position, inserting a liquid storage device assembly (not shown) into a conical groove of the limiting seat 42, then inserting a lining (not shown) of the liquid storage device assembly (not shown) into the liquid storage device assembly (not shown), starting the clamping cylinder 41, pushing the limiting seat 42 to move by the clamping cylinder 41, pushing the liquid storage device assembly (not shown) to be sleeved outside the aluminum pipe by the limiting seat 42, and positioning the butt joint of the liquid storage device (not shown) and the aluminum pipe at the moment;

thirdly, starting the welding cylinder 52, pushing the welding connecting frame 53 to descend by the welding cylinder 52, pushing the welding gun 55 to descend by the welding connecting frame 53, enabling the welding gun 55 to reach a welding position, finishing positioning of the welding gun 55, starting the welding gun 55, introducing argon into the air inlet pipe 54, and preheating the welding position by the welding gun 55;

fourthly, rotating the wire feeding wheel A62 or the wire feeding wheel B63, enabling the welding wire 61 to move on the wire feeding wheel A62 and the wire feeding wheel B63, enabling the welding wire 61 to enter a welding position, and enabling the welding gun 55 to start welding the welding position;

fifthly, during welding, the speed reducing motor 2 starts to rotate, the speed reducing motor 2 drives the placing plate 30 to rotate, the placing plate 30 drives the welding position to rotate coaxially, the welding position rotates, the welding gun 55 and the welding wire 61 weld the circumference of the welding position, after two circles of welding, the welding gun 55 stops, and the welding is completed;

sixthly, after welding is finished, the air inlet pipe 54 stops introducing argon, the welding cylinder 52 retracts, the welding cylinder 52 drives the welding connecting frame 53 and the welding gun 55 to ascend, the clamping cylinder 41 retracts, the clamping cylinder 41 drives the limiting seat 42 to retract, the ejection cylinder 80 retracts, the ejection cylinder 80 drives the locking plate 81 to retract, the rotating cylinder 31 rotates 90 degrees in the reverse direction, the rotating cylinder 31 drives the limiting plate A320 and the limiting plate B321 to reset, the limiting plate A320 and the limiting plate B321 are separated from the lower pressing plate A34 and the lower pressing plate B35, welding parts of an evaporator aluminum pipe (not shown) and a liquid storage device assembly (not shown) can be directly taken out, and the whole machining is finished.

According to the working process, the following steps are known:

firstly, an evaporator aluminum pipe (not shown) is clamped and positioned through a workbench 3 and a positioning mechanism 8, a liquid storage device assembly (not shown) and the evaporator aluminum pipe (not shown) are limited by the clamping mechanism 4, a welding mechanism 5 welds a joint, a welding wire 61 is conveyed to the welding mechanism 5 by a wire feeding mechanism 6, compared with the prior art, the evaporator is not stably fixed, so that the welding effect is poor when the evaporator is welded, leakage of welding spots after welding is easy to occur, the temperature of the welding spots is overhigh, and manual taking and placing are inconvenient, in the embodiment, the workbench 3 and the positioning mechanism 8 are used for realizing stable clamping when the evaporator is welded, the welding quality of the evaporator is improved, the welding spots are not easy to leak, and when the evaporator is taken down after welding by the workbench 3, a bottom top plate 334 can slide relatively, so that the evaporator can be taken down directly from the workbench 3, the manual operation is more convenient, and the safety of the staff is protected.

According to the above embodiment, referring to fig. 5, a transmission mechanism 7 is disposed between the reduction motor 2 and the wire feeding mechanism 6, the transmission mechanism 7 includes a driving wheel 70 fixedly connected to a free end of an output shaft of the reduction motor 2, a driven wheel 71 is disposed on one side of the mounting frame 1, specifically, the driven wheel 71 is rotatably connected to the mounting frame 1 through a support, the driven wheel 71 is in transmission connection with the driving wheel 70 through a belt 72, the wire feeding wheel a62 is connected to the driven wheel 71 through a transmission shaft 73, specifically, one end of the transmission shaft 73 is fixedly connected to the driven wheel 71, and the other end of the transmission shaft 73 is fixedly connected to the wire feeding wheel a 62.

According to the working process, the following steps are known:

in the first embodiment, when the welding gun 55 welds the joint, the reduction motor 2 drives the placing plate 30 to rotate, meanwhile, the reduction motor 2 drives the driving wheel 70 to rotate, the driving wheel 70 drives the driven wheel 71 to rotate through the belt 72, the driven wheel 71 drives the transmission shaft 73 to rotate, the electric wire feeding wheel a62 of the transmission shaft 73 rotates, the wire feeding wheel a62 drives the welding wire 61 to advance, the welding wire 61 enters the welding gun 55 and the welding joint more uniformly, so that the welding wire 61 is fed uniformly, the welding quality is improved, and the cost of the welding wire 61 is reduced.

Further, a return spring 335 is arranged between the bottom of the inner wall of the ejection housing 330 and the ejection plate 331, two ends of the return spring 335 are respectively and fixedly connected with the ejection housing 330 and the ejection plate 331, specifically, when the rotary cylinder 31 rotates 90 degrees, the ejection plate 331 descends, the ejection plate 331 compresses the return spring 335, when the rotary cylinder 31 resets, the return spring 335 resets, the ejection plate 331 is ejected, the top plate 334 is ejected, the evaporator aluminum pipe is separated from the placement groove of the auxiliary plate 37, the welded evaporator is more convenient to take out, and the safety of workers is further protected.

To sum up through workstation 3 and positioning mechanism 8, realize that the evaporimeter (not seeing) is stable when welding presss from both sides tightly, promote the welding quality of evaporimeter (not seeing), the solder joint is difficult to appear leaking, and when workstation 3 took off the evaporimeter after the welding, bottom roof 334 can the relative slip, make things convenient for evaporimeter (not seeing) directly to take off from workstation 3, make things convenient for manual operation more, protection staff's safety, welding wire 61 is at the uniform velocity more gets into welder 55 and welding department, thereby welding wire 61 realizes even pay-off, the welding quality promotes, the cost reduction of welding wire 61.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An operating method of an argon arc welding machine for assembling a liquid storage device and an aluminum pipe of an evaporator is characterized in that: the argon arc welding machine comprises a mounting rack (1), wherein a speed reduction motor (2) is mounted at the top of the mounting rack (1), and is characterized in that a workbench (3) fixedly connected with the speed reduction motor (2) is arranged above the mounting rack (1), a positioning mechanism (8) is arranged on one side of the workbench (3), a clamping mechanism (4) is arranged at the top of the mounting rack (1), a welding mechanism (5) fixedly connected with the mounting rack (1) is arranged on one side of the clamping mechanism (4), and a wire feeding mechanism (6) is arranged on one side of the welding mechanism (5);

the workbench (3) comprises a placing plate (30), a rotary cylinder (31) is arranged at the bottom of the placing plate (30), a limiting column (38) is fixedly connected to the output end of the rotary cylinder (31), a clamping plate (39) is sleeved on the surface of the limiting column (38), two ejection mechanisms (33) which are symmetrically distributed are arranged at the bottom of the placing plate (30), a lower pressing plate A (34) and a lower pressing plate B (35) are respectively arranged on opposite surfaces of the ejection mechanisms (33), a limiting component (32) is sleeved on the output end of the rotary cylinder (31), the limiting component (32) comprises a limiting plate A (320) and a limiting plate B (321), when the limiting plate A (320) rotates for 0-90 degrees, the lower pressing plate A (34) slides downwards, and when the limiting plate B (321) rotates for 0-90 degrees, the lower pressing plate B (35) presses downwards, an auxiliary plate (37) penetrates through the inside of the placing plate (30), and the auxiliary plate (37) is connected with one of the ejection mechanisms (33) through a connecting plate (36);

the ejection mechanism (33) comprises an ejection shell (330), an ejection plate (331) is connected to the inside of the ejection shell (330) in a sliding mode, a screw rod (332) is fixedly connected to the top of the ejection plate (331), a threaded sleeve (333) in threaded connection with the screw rod (332) penetrates through the inside of the placing plate (30), and a top plate (334) is fixedly connected to the top of the threaded sleeve (333); a return spring (335) is arranged between the bottom of the inner wall of the ejection shell (330) and the ejection plate (331), and two ends of the return spring (335) are respectively fixedly connected with the ejection shell (330) and the ejection plate (331); the positioning mechanism (8) comprises an ejection cylinder (80) fixed on the workbench (3), the output end of the ejection cylinder (80) is fixedly connected with a locking plate (81), the bottom of the placing plate (30) is fixedly connected with a positioning cylinder (82), one side, away from the locking plate (81), of the auxiliary plate (37) is provided with a positioning plate (83) penetrating through the placing plate (30), and the bottom of the positioning plate (83) is fixedly connected with the output end of the positioning cylinder (82); the clamping mechanism (4) comprises a clamping sliding plate (40) arranged at the top of the mounting frame (1), a clamping cylinder (41) is arranged at the top of the clamping sliding plate (40), and a limiting seat (42) in sliding connection with the clamping sliding plate (40) is arranged at the output end of the clamping cylinder (41); the welding mechanism (5) comprises four welding support frames (50) fixedly connected with the mounting frame (1), the tops of the welding support frames (50) are fixedly connected with a welding mounting plate (51), the bottoms of the welding mounting plates (51) are fixedly connected with welding cylinders (52), the bottoms of the welding cylinders (52) are fixedly connected with welding connecting frames (53), welding guns (55) penetrate through the welding connecting frames (53), and air inlet pipes (54) are arranged at the tops of the welding guns (55); the wire feeding mechanism (6) comprises a placing disc (60) rotatably connected with the mounting frame (1), welding wires (61) are wound on the surface of the placing disc (60), a wire feeding wheel A (62) and a wire feeding wheel B (63) are arranged on one side of the welding connecting frame (53), and the wire feeding wheel A (62) and the wire feeding wheel B (63) are respectively contacted with the welding wires (61); a transmission mechanism (7) is arranged between the speed reducing motor (2) and the wire feeding mechanism (6), the transmission mechanism (7) comprises a driving wheel (70) fixedly connected with the free end of an output shaft of the speed reducing motor (2), a driven wheel (71) is arranged on one side of the mounting frame (1), the driven wheel (71) is in transmission connection with the driving wheel (70) through a belt (72), and the wire feeding wheel A (62) is connected with the driven wheel (71) through a transmission shaft (73);

the working method comprises the following steps: firstly, rotating a top plate, driving a threaded sleeve to rotate by the top plate, lifting the threaded sleeve, adjusting to a height convenient for welding, placing an evaporator aluminum pipe on the top of a placing plate, starting a positioning cylinder, ejecting the positioning cylinder, ejecting a positioning plate, placing a welding end of the evaporator aluminum pipe in a placing groove of an auxiliary plate, abutting the welding end against the positioning plate, starting a rotating cylinder, driving a limiting column to rotate 90 degrees by the rotating cylinder, driving a clamping plate to rotate 90 degrees by the limiting column, meanwhile, the rotary cylinder drives a limiting plate A and a limiting plate B to synchronously rotate, the limiting plate A and the limiting plate B are respectively inserted into the tops of the lower pressing plate A and the lower pressing plate B, the state of the top plate is stabilized, the top plate and the clamping plate clamp the evaporator aluminum pipe, the ejection cylinder is started, the locking plate is ejected, the welding end is clamped by the clamping groove of the locking plate and the placing groove of the auxiliary plate, at the moment, the positioning cylinder is retracted, the positioning plate descends, and the positioning of the whole evaporator aluminum pipe is completed;

secondly, rotating a bolt at the top of the clamping sliding plate, loosening the clamping sliding plate, adjusting the clamping sliding plate to a welding position, inserting the liquid storage device assembly into a conical groove of the limiting seat, inserting a bushing of the liquid storage device assembly into the liquid storage device assembly, starting the clamping cylinder, pushing the limiting seat to move by the clamping cylinder, pushing the liquid storage device assembly to be sleeved outside the aluminum pipe by the limiting seat, and positioning the butt joint of the liquid storage device and the aluminum pipe;

thirdly, starting a welding cylinder, pushing a welding connecting frame to descend by the welding cylinder, pushing a welding gun to descend by the welding connecting frame, enabling the welding gun to reach a welding position, completing the positioning of the welding gun, starting the welding gun, introducing argon into an air inlet pipe, and preheating the welding position by the welding gun;

fourthly, rotating the wire feeding wheel A or the wire feeding wheel B, enabling the welding wire to move on the wire feeding wheel A and the wire feeding wheel B, enabling the welding wire to enter a welding position, and enabling a welding gun to start welding the welding position;

fifthly, when welding, the speed reducing motor starts to rotate, the speed reducing motor drives the placing plate to rotate, the placing plate drives the welding position to rotate coaxially, the welding position rotates, the welding gun and the welding wire circumferentially weld the welding position, and after two circles of welding, the welding gun stops and the welding is finished;

sixthly, after welding, the air inlet pipe stops introducing argon gas, the welding cylinder is withdrawn, the welding cylinder drives the welding connection frame and the welding gun to ascend, the clamping cylinder is withdrawn, the clamping cylinder drives the limiting seat to retreat, the ejection cylinder is withdrawn, the ejection cylinder drives the locking plate to retreat, the rotary cylinder rotates reversely by 90 degrees, the rotary cylinder drives the limiting plate A and the limiting plate B to reset, the limiting plate A and the limiting plate B are separated from the lower pressing plate A and the lower pressing plate B, a welding part of an evaporator aluminum pipe and a liquid storage device assembly can be directly taken out, and the whole machining is completed.