CN113664315A

CN113664315A - Production line and brazing process of air conditioner tubing assembly

Info

Publication number: CN113664315A
Application number: CN202110998938.7A
Authority: CN
Inventors: 沈督
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-28
Filing date: 2021-08-28
Publication date: 2021-11-19
Anticipated expiration: 2041-08-28
Also published as: CN113664315B

Abstract

The invention relates to the technical field of air conditioner processing equipment, and particularly discloses a production line and a brazing process of an air conditioner tubing assembly; the device comprises a U-shaped pipe head feeding machine, an edge pipe feeding machine and a welding device, wherein the U-shaped pipe head feeding machine comprises a closed loop type conveyor, a plurality of fixed blocks are fixedly connected to the upper surface of the closed loop type conveyor at intervals, a U-shaped groove used for placing a U-shaped pipe head is formed in the upper surface of each fixed block, the edge pipe feeding machine is arranged in an inner ring at one end of the closed loop type conveyor, and the welding device is arranged in an inner ring at the other end of the closed loop type conveyor; the whole production line disclosed by the invention realizes the rapid brazing of the air conditioner piping components in a flow line mode, the whole process does not need manual feeding, blanking and welding, the automation degree is high, the brazing efficiency is high, and the fixing block and the side pipe fixing clamp can be directly replaced, so that the fixing block and the side pipe fixing clamp are suitable for the air conditioner piping components with different specifications, and the applicability is wider.

Description

Production line and brazing process of air conditioner tubing assembly

Technical Field

The invention relates to the technical field of air conditioner processing equipment, and particularly discloses a production line and a brazing process of an air conditioner tubing assembly.

Background

For realizing the refrigerant circulation between air condensing units and the indoor set of air conditioning among the prior art, all need set up the shunt tubes at the air condensing units side, the shunt tubes including be responsible for and with be responsible for many spinal branchs pipes of being connected, realize the reposition of redundant personnel to the refrigerant through many spinal branchs pipes, when connecting, need weld air condensing units's shunt tubes, with a plurality of spinal branchs pipe welding to be responsible for, what have mainly adopted now welds for the manual work, but this kind of welding mode efficiency is very low, welding quality can not obtain the guarantee.

The utility model with the application number of CN201520148131.4 discloses a general air conditioner tubing welding position positioning machine, which comprises a workbench, a sleeve, a back backup plate, a core pipe, a plurality of sleeves with different inner diameters and two groups of pneumatic pressing machines; the rear backup plate and the pneumatic press are fixed on the workbench, one end face of the core tube is fixed on the front surface of the rear backup plate, sleeves with different inner diameters are sleeved with each other, the sleeve with the smallest inner diameter is sleeved on the core tube, and the sleeve is sleeved outside the sleeve with the largest inner diameter; the side wall of the sleeve is provided with two axial openings which are oppositely arranged, the side surface of each sleeve is provided with two handle rods, one end of each handle rod penetrates through the axial opening to extend out of the sleeve, the front end surface of each sleeve can be completely retracted into the sleeve or extend out of the sleeve, and the pneumatic impact presses are respectively positioned on two sides of the axis of the sleeve. The utility model discloses an air conditioner piping welding equipment can all fix a point to the welded pipeline that the specification bore is different, guarantees the depth of insertion of product and has guaranteed the uniformity of product to make whole welding equipment's general type strong, but this general type air conditioner piping welding position location machine can only realize the welding process of a piping at every turn, can't realize multistation, pipelined's air conditioner piping subassembly's welding process. Therefore, aiming at the defects that the existing general air conditioner pipe welding position positioning machine and the existing manual welding have low efficiency and can not ensure the welding quality, the application provides the welding equipment and the brazing process which can simultaneously realize the multi-station and production line type air conditioner pipe assembly.

Disclosure of Invention

The invention aims to overcome the defects that the existing universal air conditioner pipe welding position positioning machine and the existing manual welding are low in efficiency and cannot guarantee the welding quality, and provides welding equipment and a brazing process capable of achieving multi-station and production line type air conditioner pipe assembly.

The invention is realized by the following technical scheme:

a production line of an air conditioner tubing assembly comprises a U-shaped pipe head feeding machine, a side pipe feeding machine and a welding device, wherein the U-shaped pipe head feeding machine comprises a closed loop type conveyor, a plurality of fixing blocks are fixedly connected to the upper surface of the closed loop type conveyor at intervals, a U-shaped groove used for placing a U-shaped pipe head is formed in the upper surface of each fixing block, and a plurality of supporting rods are connected to the lower surface of the closed loop type conveyor at intervals;

the side tube feeding machine is arranged in an inner ring at one end of the closed loop type conveyor, the side tube feeding machine comprises a lower case, a bearing is arranged at the center of the upper surface of the lower case, a hollow rotating rod is connected in the bearing in a rotating mode, the end, extending into the inner cavity of the lower case, of the hollow rotating rod is connected with a driven belt wheel, a first driving motor is arranged on the outer side surface of the lower case, an output shaft of the first driving motor is connected with a driving belt wheel, an opening is formed in the wall of the lower case between the driven belt wheel and the driving belt wheel, a triangular driving belt penetrating through the opening is connected between the driven belt wheel and the driving belt wheel, the top end of the hollow rotating rod is connected with a rotary table, a cavity is formed in the rotary table, a cam piece is arranged at the center of the cavity, and the protruding end of the cam piece is arranged towards the bending midpoint of the end of the closed loop type conveyor, the cam piece is connected with a fixed vertical rod which penetrates through the whole hollow rotating rod, and the lower end of the fixed vertical rod is fixedly connected with the bottom wall of the lower case;

the upper surface of the rotary table is provided with a plurality of radially arranged strip-shaped openings in a rectangular array shape, two sides of each strip-shaped opening are provided with limit strakes, a side pipe fixing clamp is arranged between the two limit strakes above each strip-shaped opening, the side pipe fixing clamps and a fixing block on the closed-loop conveyor are arranged on the same horizontal plane, the lower surface of each side pipe fixing clamp is connected with a connecting block extending into a cavity, the inner side of the lower end of each connecting block is connected with a U-shaped piece, the U-shaped piece is transferred to a roller connected with the circumferential surface of the cam piece in a butting manner, the outer side of the lower end of each connecting block is connected with spring pieces, and each spring piece is connected with the outer wall of the cavity;

welding set sets up in the other end inner circle of closed loop formula conveyer, wherein welding set includes the welding frame, both ends all are connected with the flange about the upper surface of welding frame, two relative perforation has all been seted up on the flange, two all be provided with horizontal slide bar in the perforation, two be connected with bilateral rack between the horizontal slide bar, be close to the horizontal slide bar end connection of limit pipe feeder one side has U type connecting block, be provided with electromagnetic heating coil in the U type connecting block, just electromagnetic heating coil with limit pipe mounting fixture is in same horizontal plane setting, is located the welding frame upper surface of both sides all is provided with second driving motor around the bilateral rack, every all be connected with the power gear with bilateral rack engaged with on the output shaft of second driving motor.

As a further arrangement of the scheme, the closed loop type conveyor is formed by sequentially connecting a front straight line section, a rear straight line section, a left semicircular line section and a right semicircular line section end to end.

As a further arrangement of the scheme, the lower surfaces of the lower case and the welding machine base are connected with a plurality of shock absorption support legs.

According to the scheme, a layer of smooth copper layer is cladded on the hollow inner wall of the hollow rotating rod and the outer circular surface of the fixed vertical rod.

As a further arrangement of the scheme, the number of the strip-shaped openings formed in the rotary disc is 4-8.

As a further arrangement of the scheme, the side pipe fixing clamp comprises an upper clamping block and a lower clamping block, the connecting block is connected with the lower clamping block, the upper clamping block is rotatably connected with the lower clamping block through a pin rod with a torsional spring, and two side pipe clamping grooves are formed in the opposite surfaces of the upper clamping block and the lower clamping block.

As a further arrangement of the above scheme, the upper surface of each upper clamping block is connected with a magnetic block.

As a further configuration of the above scheme, the first driving motor and the second driving motor are both stepping motors or servo motors.

As a further arrangement of the above solution, the U-shaped connecting block is made of a ceramic material.

A brazing process using the production line comprises the following steps:

1) sequentially placing U-shaped pipe heads in the air conditioner pipe matching assembly into U-shaped grooves of corresponding fixed blocks through a manipulator, and simultaneously sequentially placing two side pipes in the air conditioner pipe matching assembly into corresponding side pipe fixing clamps through a robot;

2) when the closed-loop conveyor is used for transmission, the U-shaped pipe heads in the fixed block are transmitted to the nearest end of the turntable, the first driving motor controls the turntable to rotate so that two side pipes in the side pipe fixing clamp assembly are aligned with two inserting ends of the U-shaped pipe heads, and meanwhile, under the action of the cam piece, when the side pipe fixing clamp assembly rotates to a station, the whole side pipe fixing clamp assembly moves towards the fixed block, so that the two side pipes are inserted into the two inserting ends of the U-shaped pipe heads for inserting before welding;

3) after the two side pipes are inserted into the U-shaped pipe head, the whole air conditioner pipe assembly is rotated to the welding device along with the rotation of the rotary table and is aligned with the electromagnetic heating coil, the second driving motor drives the power gear to rotate, the electromagnetic heating coil extends to the inserted air conditioner pipe assembly through the meshing action between the power gear and the bilateral rack, the air conditioner pipe assembly is positioned in the electromagnetic heating coil, and then the electromagnetic heating coil is controlled to be electrified to braze the inserted position of the air conditioner pipe assembly;

4) after brazing, the second driving motor rotates reversely, the electromagnetic heating coil is separated from the air conditioner pipe distribution assembly, and then the air conditioner pipe distribution assembly is cooled by rotating along with the turntable and then taken down by the robot.

Has the advantages that:

1) the invention discloses a production line of an air conditioner piping assembly, which realizes the feeding and conveying of a U-shaped pipe head in a closed loop type production line mode, and can realize the automatic feeding of side pipes at the same time through the arrangement of a turntable, then in the process of conveying the two side pipes at the same time, the side pipe fixing clamp clamping the side pipes moves towards the U-shaped pipe head under the action of a cam piece in the inner cavity of the turntable, so that the two side pipes are inserted into the two ends of the U-shaped pipe head, the U-shaped pipe head is slipped out of a U-shaped groove along with the rotation of the turntable after the insertion is finished, finally, an electromagnetic heating coil extends into the periphery of the air conditioner piping assembly and is heated along with the rotation of the turntable when the turntable is rotated to a welding device, and the quick brazing connection of the insertion part of the two side pipes can be realized. The whole production line realizes the quick brazing of the air conditioner piping assembly in an assembly line mode, the whole process does not need manual feeding, blanking and welding, the automation degree is high, and the brazing efficiency is high.

2) When the production line of the air conditioner piping assembly disclosed by the invention is used for brazing air conditioner piping assemblies of different specifications, the fixed block on the closed-loop conveyor and the side pipe fixing clamp on the rotary table can be directly replaced, so that the replaced fixed block and side pipe fixing clamp can be suitable for the air conditioner piping assemblies of different specifications.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a first angular perspective structure of the present invention;

FIG. 2 is a schematic view of a second angular perspective structure according to the present invention;

FIG. 3 is a schematic structural diagram of a three-dimensional structure of a U-shaped pipe head feeder according to the present invention;

FIG. 4 is a schematic perspective view of the edge tube feeder of the present invention;

FIG. 5 is a schematic view of the inner plane structure of the feeder for edge tube of the present invention;

FIG. 6 is a schematic view of a first angular perspective of the turntable of the present invention;

FIG. 7 is a schematic view of a second angular perspective of the turntable of the present invention;

FIG. 8 is a schematic view of the inner top plan structure of the turntable of the present invention;

FIG. 9 is a schematic perspective view of the side tube fixing clip, the roller, the spring member, and the like according to the present invention;

fig. 10 is an enlarged schematic view of the structure at a in fig. 1 according to the present invention.

Wherein:

1-U-shaped pipe head feeder, 101-closed loop type conveyor, 102-fixed block, 103-supporting rod;

2-side pipe feeder, 201-lower case, 202-bearing, 203-hollow rotating rod, 204-driven belt wheel, 205-first driving motor, 206-driving belt wheel, 207-triangular driving belt, 208-rotating disc, 2081-cavity, 2082-strip-shaped opening, 209-cam component, 210-fixed vertical rod, 211-limit edge strip, 212-side pipe fixing clamp, 2121-upper clamping block, 2122-lower clamping block, 2123-side pipe clamping groove, 2124-magnetic block, 213-connecting block, 214-U-shaped component, 215-roller and 216-spring component;

3-welding device, 301-welding machine base, 302-convex plate, 303-horizontal sliding rod, 304-double-sided rack, 305-U-shaped connecting block, 306-electromagnetic heating coil, 307-second driving motor, 308-power gear and 400-shock absorption supporting leg.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The production line of the air conditioner piping assembly disclosed in the present application will be described in detail with reference to the accompanying drawings 1 to 10 in conjunction with the embodiments.

Example 1

This embodiment 1 discloses a production line of air conditioner piping subassembly, refer to fig. 1, fig. 2 and fig. 3, and equipment main body equipment includes U type tube head feeder 1, limit pipe feeder 2 and welding set 3.

Referring to fig. 3, the U-shaped pipe head feeder 1 includes a closed loop conveyor 101, and the closed loop conveyor 101 is specifically configured to be formed by sequentially connecting a front straight line section 1011 and a rear straight line section 1011, and a left semicircular line section 1012 and a right semicircular line section 1012 end to end, so as to form a closed loop conveying path similar to a playground runway. A plurality of fixing blocks 102 are fixedly connected to the upper surface of the closed loop type conveyor 101 at intervals, a U-shaped groove for placing a U-shaped pipe head is formed in the upper surface of each fixing block 102, and the U-shaped pipe head in the air conditioner pipe distribution assembly can be placed into the U-shaped groove by a manipulator (not shown) arranged beside the U-shaped pipe head feeder 1. Meanwhile, in order to make the whole closed loop conveyor 101 in a horizontal position, a plurality of support rods 103 are connected to the lower surface of the closed loop conveyor 101 at intervals.

Referring to fig. 1 and 2, a feeder 2 is provided in an inner ring of one end of a closed loop conveyor 101. The specific edge tube feeder 2 can refer to fig. 4, fig. 5, fig. 6, fig. 7, and fig. 8, and includes a lower casing 201, and a plurality of shock absorbing legs 400 are connected to a lower surface of the lower casing 201. Meanwhile, a bearing 202 is arranged at the center of the upper surface of the lower case 201, a hollow rotating rod 203 is rotatably connected in the bearing 202, and a driven pulley 204 is connected to the end of the hollow rotating rod 203 extending into the inner cavity of the lower case 201. And a first driving motor 205 is arranged on the outer side surface of the lower case 201, and when the first driving motor 205 is specifically arranged, a stepping motor or a servo motor can be selected. The output shaft of the first driving motor 205 is connected with a driving pulley 206, a through hole is arranged on the wall of the lower case 201 between the driven pulley 204 and the driving pulley 206, and a triangular transmission belt 207 passing through the through hole is connected between the driven pulley 204 and the driving pulley 206. The hollow rotating rod 203 can rotate in the lower case 201 through the driving action of the first driving motor 205 and then through the transmission action between the two belt wheels and the triangular transmission belt.

The top end of the hollow rotating rod 203 is connected with a rotating disc 208, a cavity 2081 is arranged in the rotating disc 208, a cam part 209 is arranged at the center of the cavity 2081, and the protruding end of the cam part 209 is arranged towards the bending midpoint of the end part of the closed-loop conveyor 101. The cam member 209 is connected with a fixed vertical rod 210 penetrating the entire hollow rotating rod 203, and the lower end of the fixed vertical rod 210 is fixedly connected with the bottom wall of the lower case 201. When the hollow rotating rod 203 rotates, the hollow rotating rod can rotate around the fixed vertical rod 210, and meanwhile, in order to reduce the friction force of the contact surface when the hollow rotating rod 203 and the fixed vertical rod rotate relatively and increase the wear-resisting effect, a smooth copper layer (not shown in the figure) is cladded on the hollow inner wall of the hollow rotating rod 203 and the outer circular surface of the fixed vertical rod 210.

The upper surface of the turntable 208 is provided with a plurality of radially arranged strip-shaped openings 2082 in a rectangular array shape, and specifically, the number of the strip-shaped openings 2082 arranged on the turntable 208 is 4-8 when the turntable is arranged. Both sides that are located every bar mouth 2082 all are provided with spacing strake 211, all are provided with between two spacing strakes 211 that are located every bar mouth 2082 top and manage mounting fixture 212. Referring to fig. 9, the side tube fixing clamp 212 includes an upper clamp block 2121 and a lower clamp block 2122, the connecting block 213 is connected to the lower clamp block 2122, the upper clamp block 2121 is rotatably connected to the lower clamp block 2122 via a pin rod having a torsion spring, and two side tube clamp grooves 2123 are formed on opposite surfaces of the upper clamp block 2121 and the lower clamp block 2122. When the turntable 208 is rotated to the loading robot, the two side tubes of the air conditioner can be inserted into the side tube holder grooves 2123 of the side tube fixing holders 212 to be fixed. Meanwhile, during the setting, it should be noted that the side tube fixing clamp 212 and the fixing block 102 on the closed loop conveyor 101 are both arranged on the same horizontal plane, so as to ensure that the two can be aligned.

The lower surface of the side pipe fixing clamp 212 is connected with connecting blocks 213 extending into the cavity 2081, the inner side of the lower end of each connecting block 213 is connected with a U-shaped piece 214, the U-shaped pieces 214 transfer to rollers 215 connected with the circumferential surface of the cam part 209, the outer side of the lower end of each connecting block 213 is connected with a spring part 216, and each spring part 216 is connected with the outer wall of the cavity 2081. When the side pipe fixing jig 212 rotates with the turntable 208 and rotates to the bending midpoint closest to the end of the closed loop conveyor 101, the side pipe fixing jig 212 can be pushed toward the U-shaped pipe head due to the abutting action between the protruding end of the cam member 209 and the roller 215, so that the upper two side pipes are aligned with and inserted into the end of the U-shaped pipe head.

Finally, a welding device 3 is arranged in the inner ring at the other end of the closed-loop conveyor 101 and used for brazing the spliced air conditioner pipe assembly.

Example 2

This embodiment 2 discloses a production line of an air conditioner piping assembly improved based on embodiment 1, which is the same as embodiment 1 and will not be described again, except that:

referring to fig. 1, fig. 2 and fig. 10, welding set 3 in this embodiment 2 includes welding frame 301, lower surface at welding frame 301 also is connected with a plurality of shock attenuation stabilizer blades 400, both ends all are connected with flange 302 about welding frame 301's the upper surface, relative perforation has all been seted up on two flange 302, all be provided with horizontal sliding rod 303 in two perforations, be connected with bilateral rack 304 between two horizontal sliding rod 303, the horizontal sliding rod 303 end connection who is close to side pipe feeder 2 one side has U type connecting block 305, wherein U type connecting block 305 is made by ceramic material. An electromagnetic heating coil 306 is provided in the U-shaped connection block 305, and the electromagnetic heating coil 306 is disposed at the same level as the side pipe fixing jig 212.

Meanwhile, second driving motors 307 are arranged on the upper surfaces of the welding machine bases 301 located on the front side and the rear side of the double-sided rack 304, a power gear 308 meshed with the double-sided rack 304 is connected to an output shaft of each second driving motor 307, and the second driving motors 307 can be stepping motors or servo motors.

When the air conditioner pipe assembly which is well inserted is conveyed to the welding device 3, the air conditioner pipe assembly is driven by a second driving motor 307, then the electromagnetic heating coil 306 is pushed to the air conditioner pipe assembly under the transmission action of the power gear 308 and the double-sided rack 304, the air conditioner pipe assembly is positioned in the inner ring of the electromagnetic heating coil 306, and then the electromagnetic heating coil 306 is electrified to braze the inserted position.

In addition, in this embodiment 2, the magnetic block 2124 is further connected to the upper surface of each upper clamping block 2121, and when the air conditioner piping assembly rotates to the unloading position along with the turntable 208 after being welded, the magnetic block 2124 can be attracted by the electromagnet arranged above, so that the upper clamping block 2121 can be automatically rotated upwards to be opened, and then the robot can perform fast unloading.

In addition, the invention also discloses a brazing process carried out by using the production line of the embodiment 2, which comprises the following steps:

the method comprises the following steps: sequentially placing U-shaped pipe heads in the air conditioner pipe matching assembly into U-shaped grooves of corresponding fixed blocks through a manipulator, and simultaneously sequentially placing two side pipes in the air conditioner pipe matching assembly into corresponding side pipe fixing clamps through a robot;

step two: when the closed-loop conveyor is used for transmission, the U-shaped pipe heads in the fixed block are transmitted to the nearest end of the turntable, the first driving motor controls the turntable to rotate so that two side pipes in the side pipe fixing clamp assembly are aligned with two inserting ends of the U-shaped pipe heads, and meanwhile, under the action of the cam piece, when the side pipe fixing clamp assembly rotates to a station, the whole side pipe fixing clamp assembly moves towards the fixed block, so that the two side pipes are inserted into the two inserting ends of the U-shaped pipe heads for inserting before welding;

step three: after the two side pipes are inserted into the U-shaped pipe head, the whole air conditioner pipe assembly is rotated to the welding device along with the rotation of the rotary table and is aligned with the electromagnetic heating coil, the second driving motor drives the power gear to rotate, the electromagnetic heating coil extends to the inserted air conditioner pipe assembly through the meshing action between the power gear and the bilateral rack, the air conditioner pipe assembly is positioned in the electromagnetic heating coil, and then the electromagnetic heating coil is controlled to be electrified to braze the inserted position of the air conditioner pipe assembly;

step four: after brazing, the second driving motor rotates reversely, the electromagnetic heating coil is separated from the air conditioner pipe distribution assembly, and then the air conditioner pipe distribution assembly is cooled by rotating along with the turntable and then taken down by the robot.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The production line of the air conditioner tubing assembly is characterized by comprising a U-shaped tube head feeder (1), an edge tube feeder (2) and a welding device (3), wherein the U-shaped tube head feeder (1) comprises a closed-loop type conveyor (101).

2. The production line of the air conditioner piping assembly according to claim 1, wherein a plurality of fixed blocks (102) are fixedly connected to the upper surface of the closed loop conveyor (101) at intervals, a U-shaped groove for placing a U-shaped pipe head is formed in the upper surface of each fixed block (102), and a plurality of support rods (103) are connected to the lower surface of the closed loop conveyor (101) at intervals;

the side pipe feeder (2) is arranged in an inner ring at one end of the closed loop type conveyor (101), wherein the side pipe feeder (2) comprises a lower case (201), a bearing (202) is arranged at the center of the upper surface of the lower case (201), a hollow rotating rod (203) is rotatably connected in the bearing (202), a driven belt wheel (204) is connected to the end part of the hollow rotating rod (203) extending into the inner cavity of the lower case (201), a first driving motor (205) is arranged on the outer side surface of the lower case (201), a driving belt wheel (206) is connected to an output shaft of the first driving motor (205), a through hole is formed in the wall of the lower case (201) between the driven belt wheel (204) and the driving belt wheel (206), a triangular transmission belt (207) penetrating through the through hole is connected between the driven belt wheel (204) and the driving belt wheel (206), and a rotary table (208) is connected to the top end of the hollow rotating rod (203), a cavity (2081) is formed in the turntable (208), a cam part (209) is arranged at the center of the cavity (2081), the protruding end of the cam part (209) is arranged towards the bending midpoint of the end part of the closed-loop conveyor (101), a fixed vertical rod (210) penetrating through the whole hollow rotating rod (203) is connected to the cam part (209), and the lower end of the fixed vertical rod (210) is fixedly connected with the bottom wall of the lower case (201);

the upper surface of the rotary table (208) is in a rectangular array shape and is provided with a plurality of radially arranged strip-shaped openings (2082), two sides of each strip-shaped opening (2082) are respectively provided with a limit edge strip (211), an edge pipe fixing clamp (212) is arranged between the two limit edge strips (211) above each strip-shaped opening (2082), the edge pipe fixing clamp (212) and a fixing block (102) on the closed-loop conveyor (101) are arranged on the same horizontal plane, the lower surface of the edge pipe fixing clamp (212) is connected with a connecting block (213) extending into a cavity (2081), the inner side of the lower end of each connecting block (213) is connected with a U-shaped piece (214), the U-shaped piece (214) is transferred to a roller (215) which is connected with the circumferential surface of the cam piece (209) in an abutting mode, and the outer side of the lower end of the connecting block (213) is connected with a spring piece (216), each spring piece (216) is connected with the outer wall of the cavity (2081);

the welding device (3) is arranged in an inner ring at the other end of the closed-loop conveyor (101), the welding device (3) comprises a welding machine base (301), the left end and the right end of the upper surface of the welding machine base (301) are both connected with convex plates (302), two convex plates (302) are respectively provided with opposite through holes, horizontal sliding rods (303) are respectively arranged in the two through holes, a double-side rack (304) is connected between the two horizontal sliding rods (303), the end part of the horizontal sliding rod (303) close to one side of the side pipe feeder (2) is connected with a U-shaped connecting block (305), an electromagnetic heating coil (306) is arranged in the U-shaped connecting block (305), the electromagnetic heating coil (306) and the side pipe fixing clamp (212) are arranged on the same horizontal plane, and second driving motors (307) are respectively arranged on the upper surfaces of the welding machine base (301) at the front side and the rear side of the double-side rack (304), the output shaft of each second driving motor (307) is connected with a power gear (308) meshed with the double-sided rack (304); the closed loop type conveyor (101) is formed by sequentially connecting a front straight line section (1011) and a rear straight line section (1011) and a left semicircular line section (1012) and a right semicircular line section (1012) end to end.

3. The production line of air conditioner piping assembly according to claim 2, wherein a plurality of shock absorbing legs (400) are connected to the lower surfaces of the lower cabinet (201) and the welding base (301).

4. The production line of air conditioner piping components as claimed in claim 2, wherein the hollow inner wall of the hollow rotating rod (203) and the outer circumferential surface of the fixed upright (210) are each clad with a smooth copper layer.

5. The production line of the air conditioner piping assembly as claimed in claim 2, wherein the number of the strip-shaped openings (2082) formed in the turntable (208) is 4-8.

6. The production line of air conditioner piping assembly as claimed in claim 2, wherein the side pipe fixing jig (212) comprises an upper clamp block (2121) and a lower clamp block (2122), the connecting block (213) is connected to the lower clamp block (2122), the upper clamp block (2121) is rotatably connected to the lower clamp block (2122) by a pin having a torsion spring, and two side pipe clamp grooves (2123) are opened on opposite surfaces of the upper clamp block (2121) and the lower clamp block (2122).

7. The production line of air conditioner piping assembly as claimed in claim 6, wherein a magnet block (2124) is attached to an upper surface of each of the upper clamp blocks (2121).

8. The production line of air conditioner piping assembly as claimed in claim 2, wherein the first driving motor (205) and the second driving motor (307) are both stepping motors or servo motors.

9. The production line of air conditioner piping assemblies as claimed in claim 2, wherein said U-shaped connection block (305) is made of a ceramic material.

10. A brazing process carried out using the production line according to any one of claims 2 to 9, comprising the steps of:

after brazing, the second driving motor rotates reversely, the electromagnetic heating coil is separated from the air conditioner pipe distribution assembly, and then the air conditioner pipe distribution assembly is cooled by rotating along with the turntable and then taken down by the robot.