CN213857762U

CN213857762U - Welding mechanism for welding pipe fitting joint

Info

Publication number: CN213857762U
Application number: CN202022701200.3U
Authority: CN
Inventors: 杨守强; 彭军池; 李民
Original assignee: Foshan Kim Machinery Technology Co ltd
Current assignee: Foshan Kim Machinery Technology Co ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-08-03
Anticipated expiration: 2030-11-20

Abstract

The utility model relates to a welding machine technical field specifically is a welding mechanism for welding pipe fitting connects, include: a mounting seat; the welding turntable comprises a rotating shaft and a pipe fitting joint fixing column for fixing a workpiece, and the pipe fitting joint fixing column is arranged at the upper end of the rotating shaft; the welding assembly is arranged on the mounting seat and comprises a welding gun, and a nozzle of the welding gun is over against the welding position of the workpiece; the driving assembly is installed on the installation seat and is in transmission connection with the rotating shaft so as to drive the rotating shaft to rotate. The utility model relates to a welding mechanism for welding pipe fitting connects is provided with the welding carousel, makes two work pieces of treating to weld together can overlap and establish on pipe fitting joint fixed column, has reduced fixed work piece's structure, and makes the welding mechanism structure simpler, the volume is littleer.

Description

Welding mechanism for welding pipe fitting joint

Technical Field

The utility model relates to a welding machine technical field specifically is a welding mechanism for welding pipe fitting connects.

Background

In the existing pipe joint welding machines, a welding mode of transversely placing workpieces is adopted, and in the welding process, two pipes need to be separately provided with fixing pieces for fixing, so that the structure of a welding mechanism is complicated; in the welding process, in order to enable a welding gun to weld a workpiece by 360 degrees, a plurality of welding guns are arranged on a plurality of welding machines or are arranged in a mode of rotating around the workpiece by 360 degrees; the cost is high and the welding effect is poor due to the arrangement of a plurality of welding guns; the welding gun is arranged in a mode of rotating 360 degrees around the workpiece, so that the welding mechanism is complex and the welding machine is large in size.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a welding mechanism for welding pipe fitting connects aims at solving among the prior art technical problem that the welding mechanism structure is complicated, welding machine manufacturing cost is high.

In order to achieve the above object, the utility model provides a welding mechanism for welding pipe fitting connects, include:

a mounting seat;

the welding turntable comprises a rotating shaft and a pipe fitting joint fixing column for fixing a workpiece, and the pipe fitting joint fixing column is arranged at the upper end of the rotating shaft;

the welding assembly is arranged on the mounting seat and comprises a welding gun, and a nozzle of the welding gun is over against the welding position of the workpiece;

the driving assembly is installed on the installation seat and is in transmission connection with the rotating shaft so as to drive the rotating shaft to rotate. The welding mechanism has simpler structure and smaller integral volume of the welding machine.

Preferably, the welding turntable further comprises a rotary table, the rotary table is sleeved on the pipe fitting joint fixing column, and the rotary table is detachably mounted at the upper end of the rotary shaft. The rotary table is arranged to further fix the pipe fitting joint fixing column.

Preferably, the welding turntable further comprises a bearing, the bearing is installed in an installation hole formed in the station turntable, and the rotating shaft penetrates through the bearing and the installation hole, so that the bearing is sleeved on the rotating shaft. The station turntable is arranged, so that a workpiece to be welded can be conveniently rotated to a welding station, and the welded workpiece can be conveniently rotated to a blanking station; and the station turntable is provided with a mounting hole, so that the welding turntable can be conveniently and rotatably mounted on the station turntable relative to the station turntable.

Preferably, the station carousel has evenly seted up a plurality ofly around its central interval the mounting hole, every the mounting hole all corresponds and is provided with the welding carousel. A plurality of mounting holes and a plurality of welding turntables are formed in the station turntables, so that each station of the welding machine can work synchronously, the utilization rate of the welding mechanism is improved, and the production efficiency of the welding machine is improved.

Preferably, the driving assembly comprises a motor and a friction clutch, the motor is installed on the installation seat, the friction clutch is installed at the output end of the motor, and the friction clutch is in transmission connection with the rotating shaft. The motor and the friction clutch are arranged, so that the automation of workpiece rotation can be realized, and the welding quality can be ensured by automatically controlling the workpiece rotation; the friction clutch is conveniently in transmission connection with the rotating shaft, and can stably drive the rotating shaft to rotate so as to drive the workpiece to rotate.

Preferably, the upper end surface of the friction clutch is provided with a downwardly extending accommodating hole, the side wall of the accommodating hole is provided with a first conical surface which is close to one side of the accommodating hole from top to bottom at the center of the circle, and the lower end of the rotating shaft is provided with a second conical surface which is close to the central axis of the rotating shaft from top to bottom; the rotating shaft is clamped in the accommodating hole, so that the first conical surface is in butt fit with the second conical surface. The friction clutch can be rotatably connected with the rotating shaft only through the mechanical friction force of the first conical surface and the second conical surface, so that the welding turntable can be conveniently connected with the motor in a transmission mode when moving to a welding station, and the welding turntable can be conveniently moved away after a workpiece is welded.

Preferably, the driving assembly further comprises a linear guide rail, an air cylinder, a first connecting plate and a first slider, the linear guide rail is mounted on the mounting seat, the first slider is slidably mounted on the linear guide rail, the first connecting plate is mounted on the first slider, the first connecting plate is connected with a first output end of the air cylinder, and the motor is mounted on the first connecting plate. The driving assembly is provided with a structure capable of driving the motor and the friction clutch to lift, so that the friction clutch and the welding turntable can be prevented from interfering when the station turntable rotates; the rotating shaft and the friction clutch can be connected in a transmission way by automatically controlling the friction clutch to rise, so that the motor drives the workpiece to rotate; on the other hand, the cylinder provides the ascending power of friction clutch, makes friction clutch and pivot connect more firmly, and the rotation of work piece is more stable.

Preferably, the pipe fitting joint fixing device further comprises a pressing assembly, the pressing assembly comprises a second connecting plate and a pressing piece, the second connecting plate is installed on the second output end of the air cylinder, the pressing piece is installed on the second connecting plate, and the pressing piece is located right above the pipe fitting joint fixing column. The pressing component is arranged, so that the welded and rotated workpieces can be further fixed, and the workpieces are prevented from inclining and even falling.

Preferably, the hold-down assembly further comprises a second slider slidably mounted on the linear guide, and the second connecting plate is mounted on the second slider. The lifting accuracy of the pressing component is guaranteed, and the pressing component can be guaranteed to accurately press the workpiece.

Preferably, the welding assembly further comprises a cross rod and a vertical rod, one end of the cross rod is installed on the installation seat through a fixing piece, the vertical rod is installed at the other end of the vertical rod, and the welding gun is installed at the lower end of the vertical rod. The arrangement of the transverse rod and the vertical rod can firmly install the welding gun on the mounting seat, the structure among the mounting seat, the welding gun and the welding turntable is more compact, the whole volume of the welding mechanism is reduced, and therefore the volume of the welding machine is smaller.

The utility model relates to a welding mechanism for welding pipe fitting connects has following beneficial effect at least: the welding turntable is arranged, so that two workpieces to be welded together can be sleeved on the pipe fitting joint fixing column, the structure for fixing the workpieces is reduced, and the welding mechanism is simpler in structure and smaller in size; the driving assembly drives the welding turntable to rotate, so as to drive the workpiece to rotate, and therefore, the purpose that the workpiece can be welded at 360 degrees by using only one welding gun under the condition that the welding gun is not moved is achieved; the welding gun does not need to rotate in the welding process, so that the welding machine does not need to reserve the rotating position of the welding gun, and the whole volume of the welding machine is smaller.

Drawings

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

FIG. 1 is a schematic side view of a welding mechanism according to the present invention;

FIG. 2 is a schematic structural view of the welding mechanism of the present invention in another direction;

fig. 3 is a schematic view of the matching structure of the driving assembly, the pressing assembly and the mounting seat of the present invention;

FIG. 4 is a schematic view of the explosion structure of the welding turntable and the station turntable of the present invention;

FIG. 5 is a schematic structural view of the welding turntable of the present invention;

FIG. 6 is a schematic structural view of the rotating shaft of the present invention;

fig. 7 is a schematic structural view of the friction clutch of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Mounting seat	421	Receiving hole
2	Welding turntable	422	First conical surface
				21	Rotating shaft	43	Linear guide rail
211	Second conical surface	44	Cylinder
				22	Pipe fitting joint fixing column	441	A first output terminal
23	Rotary table	442	Second output terminal
				24	Bearing assembly	45	First connecting plate
3	Welded assembly	46	First slide block
				34	Welding gun	5	Station turntable
32	Cross bar	51	Mounting hole
				33	Vertical rod	6	Push-down assembly
34	Fixing piece	61	Second connecting plate
				4	Drive assembly	62	Down-pressure piece
41	Electric machine	63	Second slide block
				42	Friction clutch

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 to 7, a welding mechanism for welding a pipe joint includes:

a mounting base 1;

the welding turntable 2 comprises a rotating shaft 21 and a pipe fitting joint fixing column 22 for fixing a workpiece, wherein the pipe fitting joint fixing column 22 is installed at the upper end of the rotating shaft 21;

the welding assembly 3 is mounted on the mounting base 1, the welding assembly 3 comprises a welding gun 31, and a nozzle of the welding gun 31 is over against the welding position of a workpiece;

the driving assembly 4 is installed on the installation seat 1, and the driving assembly 4 is in transmission connection with the rotating shaft 21 so as to drive the rotating shaft 21 to rotate.

The mounting seat 1 is used for supporting and fixing various parts of the welding mechanism and is used for mounting and fixing the welding mechanism on a welding machine. The welding turntable 2 is used for fixing a workpiece, the welding turntable 2 comprises a rotating shaft 21 and a pipe fitting joint fixing column 22, the pipe fitting joint fixing column 22 is arranged at the upper end of the rotating shaft 21 and used for fixing the workpiece, and specifically, a tubular workpiece is sleeved on the pipe fitting joint fixing column 22; the rotation of the shaft 21 drives the pipe joint fixing post 22 to rotate, and further drives the workpiece to rotate. The welding assembly 3 is installed on the installation seat 1, the welding assembly 3 comprises a welding gun 31, and the welding gun 31 is used for welding a workpiece to complete the welding of a pipe joint, so that a nozzle of the welding gun 31 needs to be opposite to a welding position of the workpiece. The driving assembly 4 is installed on the installation base 1, and the driving assembly 4 is a power source for supplying power to the rotating shaft 21 and rotating the same. The process of welding the workpiece by the welding mechanism comprises the following steps: sleeving two workpieces to be welded on the pipe fitting joint fixing column 22, enabling a nozzle of a welding gun 31 to face a joint of the two workpieces (namely, a part to be welded), starting the welding gun 31, and starting a driving device to drive a rotating shaft 21 to rotate in the welding process so as to drive the pipe fitting joint fixing column 22 and the workpieces on the rotating shaft to rotate; the workpiece rotates, and the welding gun 31 welds the workpiece; and then the welding of the workpiece is completed.

In the existing pipe joint welding machines, a welding mode of transversely placing workpieces is adopted, and in the welding process, two pipes need to be separately provided with fixing pieces for fixing, so that the structure of a welding mechanism is complicated; in the welding process, in order to enable a welding gun to weld a workpiece by 360 degrees, a plurality of welding guns are arranged on a plurality of welding machines or are arranged in a mode of rotating around the workpiece by 360 degrees; the cost is high and the welding effect is poor due to the arrangement of a plurality of welding guns; the welding gun is arranged in a mode of rotating 360 degrees around the workpiece, so that the welding mechanism is complex and the welding machine is large in size. In the technical scheme, the welding turntable 2 is arranged, so that two workpieces to be welded together can be sleeved on the pipe fitting joint fixing column 22, the structure for fixing the workpieces is reduced, and the welding mechanism is simpler in structure and smaller in size; the driving component 4 drives the welding turntable 2 to rotate, so as to drive the workpiece to rotate, and therefore 360-degree welding of the workpiece can be completed by only using one welding gun 31 under the condition that the welding gun 31 is not moved; the welding gun 31 does not need to rotate in the welding process, so that the welding machine does not need to reserve the rotating position of the welding gun 31, and the whole volume of the welding machine is smaller.

Further, the welding turntable 2 further comprises a turntable 23, the turntable 23 is sleeved on the pipe fitting joint fixing column 22, and the turntable 23 is detachably mounted at the upper end of the rotating shaft 21.

The turntable 23 is disc-shaped and is provided with a through hole; the rotary table 23 is sleeved on the pipe fitting joint fixing column 22 and fixed at the upper end of the rotating shaft 21; the turntable 23 and the rotating shaft 21 can be connected and fixed by a connecting piece such as a screw. The provision of the turntable 23 further secures the pipe joint fixing post 22.

Further, the welding turntable 2 further comprises a bearing 24, the bearing 24 is installed in an installation hole 51 formed in the station turntable 5, and the rotating shaft 21 penetrates through the bearing 24 and the installation hole 51, so that the bearing 24 is sleeved on the rotating shaft 21.

The station turntable 5 is integrally disc-shaped and is used for fixing the welding turntable 2 and sleeving a workpiece on the pipe fitting joint fixing column 22. The station turntable 5 can rotate the workpiece to be welded to the welding station (i.e., the workpiece to be welded is aligned with the nozzle of the welding gun 31) by rotating. For example, the station turntable 5 rotates the welding turntable 23 to the feeding station, the workpiece to be welded is fed, the station turntable 5 rotates the fed welding turntable 23 to the welding station, the welding gun 31 welds the workpiece, the welded workpiece is rotated to the discharging station by the station turntable 5 after the welding is completed, and finally the workpiece is discharged. A vertically through mounting hole 51 is formed in the station turntable 5, and a welding turntable 2 is arranged at the mounting hole 51; specifically, the bearing 24 is installed in the installation hole 51, the outer wall of the outer ring of the bearing 24 is abutted against the hole wall of the installation hole 51, so that the bearing 24 is clamped in the installation hole 51, and the installation hole 51 and the bearing 24 have the same circle center; the rotating shaft 21 penetrates through the bearing 24 and the mounting hole 51 from bottom to top, so that the bearing 24 is sleeved on the rotating shaft 21, namely, the outer wall of the rotating shaft 21 is abutted against the inner wall of the inner ring of the bearing 24, the upper end of the rotating shaft 21 penetrates through the mounting hole 51 and is positioned above the station turntable 5, and the lower end of the rotating shaft 21 is positioned below the station turntable 5. When the rotating shaft 21 rotates, the workpiece on the upper end surface can rotate; the rotating shaft 21 rotates, the inner ring of the bearing 24 rotates, but the outer ring of the bearing 24 is fixedly connected with the station turntable 5 and does not rotate, so that the workpiece rotates under the condition that the station turntable 5 is fixed. The station turntable 5 is arranged, so that a workpiece to be welded can be conveniently rotated to a welding station, and the welded workpiece can be conveniently rotated to a blanking station; and the station turntable 5 is provided with a mounting hole 51, so that the welding turntable 23 can be conveniently and rotatably mounted on the station turntable 5 relative to the station turntable 5.

Further, the station turntable 5 is uniformly provided with a plurality of mounting holes 51 at intervals around the center thereof, and each mounting hole 51 is correspondingly provided with the welding turntable 2.

In this embodiment, the station turntable 5 is disc-shaped, so that a plurality of mounting holes 51 are uniformly formed at intervals around the center of the station turntable 5, and the diameters of the mounting holes 51 are the same; the welding turnplate 2 is correspondingly arranged at each mounting hole 51. In the pipe fitting joint welding machine, a workpiece generally needs to be welded through a plurality of stations, and the station turntable 5 is provided with a plurality of mounting holes 51 and a plurality of welding turntables 2, so that the multi-station welding machine can be used; generally, the welding mechanism is provided with four stations: the device comprises a first workpiece feeding station, a second workpiece feeding station, a welding station and a discharging station; in this embodiment, the station turntable 5 may be provided with four mounting holes 51, and the welding mechanism is provided with four welding turntables 2. Feeding a first workpiece to a first welding turntable 2, and then rotating a station turntable 5 to move the first welding turntable 2 to a second workpiece feeding station; feeding a second workpiece to the first welding turntable 2, and then continuously rotating the station turntable 5 to move the first welding turntable 2 to a welding station; a welding gun 31 on the welding station is used for welding and fixing the first workpiece and the second workpiece; after welding, the station turntable 5 continues to rotate, so that the first welding turntable 2 moves to a blanking station, and then a welded product is blanked. When welding work is carried out at a welding station, a first workpiece feeding station is used for feeding a first workpiece, a second workpiece feeding station is used for feeding a second workpiece, and a blanking station is used for blanking welded products. The station turntables 5 are provided with a plurality of mounting holes 51 and a plurality of welding turntables 2, so that each station of the welding mechanism can synchronously work, the utilization rate of the welding mechanism is improved, and the production efficiency of the welding machine is improved.

Further, the driving assembly 4 comprises a motor 41 and a friction clutch 42, the motor 41 is mounted on the mounting base 1, the friction clutch 42 is mounted at an output end of the motor 41, and the friction clutch 42 is in transmission connection with the rotating shaft 21.

The driving assembly 4 is positioned below the welding turntable 2, the motor 41 is used for providing rotating power for the rotating shaft 21, the motor 41 is installed on the installation base 1, the friction clutch 42 is installed at the output end of the motor 41, and when the motor 41 works, the output end of the motor can drive the friction clutch 42 to rotate; the friction clutch 42 is in transmission connection with the rotating shaft 21, and the friction clutch 42 can drive the rotating shaft 21 to rotate when rotating, so that the driving component 4 drives the rotating shaft 21 to rotate, and the workpiece is driven to rotate. The motor 41 and the friction clutch 42 are arranged, so that the automation of workpiece rotation can be realized, and the welding quality can be ensured by automatically controlling the workpiece rotation; the friction clutch 42 is conveniently in transmission connection with the rotating shaft 21, and can stably drive the rotating shaft 21 to rotate so as to drive the workpiece to rotate.

Furthermore, the upper end surface of the friction clutch 42 is provided with a receiving hole 421 extending downward, the side wall of the receiving hole 421 is provided with a first conical surface 422 approaching to one side of the center of the receiving hole 421 from top to bottom, and the lower end of the rotating shaft 21 is provided with a second conical surface 211 approaching to the central axis of the rotating shaft 21 from top to bottom; the rotating shaft 21 is clamped in the accommodating hole 421, so that the first tapered surface 422 and the second tapered surface 211 are in abutting fit.

The integral structures of the rotating shaft 21 and the friction clutch 42 are both cylindrical, and the diameter of the friction clutch 42 is larger than that of the rotating shaft 21; the upper end of the friction clutch 42 is provided with a containing hole 421, the side wall of the containing hole 421 is provided with a first conical surface 422 which is close to one side of the circle center of the containing hole 421 from top to bottom, and the whole friction clutch 42 is cylindrical, so the first conical surface 422 is an annular conical surface; the lower end of the rotating shaft 21 is provided with a second conical surface 211 approaching to the central axis of the rotating shaft 21 from top to bottom, and the rotating shaft 21 is cylindrical as a whole, so the second conical surface 211 is an annular conical surface. The first tapered surface 422 corresponds to the second tapered surface 211, and when the rotating shaft 21 is clamped in the accommodating hole 421, the first tapered surface 422 and the second tapered surface 211 are abutted with each other; therefore, the friction clutch 42 rotates to drive the rotating shaft 21 to rotate by the mechanical friction force of the first tapered surface 422 and the second tapered surface 211. The friction clutch 42 can be rotatably connected with the rotating shaft 21 only through the mechanical friction force of the first conical surface 422 and the second conical surface 211, so that the welding turntable 2 is conveniently in transmission connection with the motor 41 when moving to a welding station, and the welding turntable 2 is also conveniently moved after a workpiece is welded. As mentioned above, the welding turntables 2 are provided with a plurality of welding turntables, and the shapes and the structures are the same, so that the first welding turntable 2 fixed with the workpiece to be welded can be very simply and conveniently in transmission connection with the motor 41 when rotating to the welding station; after the workpiece is welded, the first welding turntable 2 is very conveniently separated from the motor 41, and meanwhile, the second welding turntable 2 with the station to be welded is conveniently in transmission connection with the motor 41.

Further, the driving assembly 4 further includes a linear guide 43, an air cylinder 44, a first connecting plate 45 and a first slider 46, the linear guide 43 is mounted on the mounting base 1, the first slider 46 is slidably mounted on the linear guide 43, the first connecting plate 45 is mounted on the first slider 46, the first connecting plate 45 is connected with a first output end 441 of the air cylinder 44, and the motor 41 is mounted on the first connecting plate 45.

The number of the linear guide rails 43 is two, and the two linear guide rails are arranged on the mounting base 1 in parallel, and the motor 41 and the friction clutch 42 are positioned between the two linear guide rails 43; a first sliding block 46 is slidably mounted on the linear guide rail 43, a first connecting plate 45 is mounted on the first sliding block 46, and the first sliding block 46 can slide on the linear guide rail 43 to drive the first connecting plate 45 to move up and down; the first connecting plate 45 is connected with the first output end 441 of the cylinder 44, the extending direction of the first output end 441 is downward, and when the first output end 441 of the cylinder 44 extends, the first connecting plate 45 moves downward; the motor 41 is mounted on the first connecting plate 45, and the first connecting plate 45 drives the motor 41 to move up and down when moving up and down. In the initial state, the first output end 441 of the air cylinder 44 is in an extended state, the motor 41 and the friction clutch 42 are in lower positions, and when the station turntable 5 rotates to rotate the welding turntable 2 fixed with two workpieces to be welded to a position right above the motor 41 and the friction clutch 42, the first output end 441 of the air cylinder 44 contracts to drive the first connecting plate 45 to ascend, and further drive the motor 41 and the friction clutch 42 to ascend; the friction clutch 42 is lifted to abut against the rotating shaft 21, the lower end of the rotating shaft 21 is inserted into the accommodating hole 421, and the first tapered surface 422 abuts against the second tapered surface 211. The driving assembly 4 is provided with a structure capable of driving the motor 41 and the friction clutch 42 to ascend and descend, so that the friction clutch 42 and the welding turntable 2 are prevented from interfering when the station turntable 5 rotates; the rotating shaft 21 and the friction clutch 42 can be in transmission connection by automatically controlling the friction clutch 42 to ascend, so that the motor 41 drives the workpiece to rotate; on the other hand, the air cylinder 44 provides the power for lifting the friction clutch 42, so that the friction clutch 42 and the rotating shaft 21 are connected more firmly, and the rotation of the workpiece is more stable.

Further, a pressing assembly 6 is further included, the pressing assembly 6 includes a second connecting plate 61 and a pressing member 62, the second connecting plate 61 is mounted on the second output end 442 of the cylinder 44, the pressing member 62 is mounted on the second connecting plate 61, and the pressing member 62 is located directly above the pipe joint fixing column 22.

The pressing assembly 6 is used for providing a certain pressing force during the welding and rotating process of the workpieces so as to improve the stability of the workpieces and prevent the workpieces from inclining and even falling off during the welding and rotating process. The cylinder 44 has a structure with independent output ends at the upper and lower ends, wherein the first output end 441 of the cylinder 44 extends downward, and the second output end 442 of the cylinder 44 extends upward. The pressing assembly 6 comprises a second connecting plate 61 and a pressing member 62, the second connecting plate 61 is mounted on the second output end 442, and the second output end 442 of the air cylinder 44 can be lifted to drive the second connecting plate 61 to lift; the lower pressing piece 62 is arranged on the second connecting plate 61, and the second connecting plate 61 can drive the lower pressing piece 62 to lift when lifting; the lower pressing member 62 is located directly above the pipe joint fixing column 22, and when the lower pressing member 62 moves downward, the lower end of the lower pressing member is abutted against a workpiece sleeved on the pipe joint fixing column 22, specifically, the lower end of the lower pressing member 62 is inserted into the pipe workpiece from top to bottom, and the pipe workpiece can rotate relative to the lower pressing member 62. The pressing component 6 is arranged to further fix the welded and rotated workpiece, so that the workpiece is prevented from inclining and even falling; the pressing component 6 can be driven to lift through the air cylinder 44, so that the welding turntable 2 rotating to the welding station cannot be interfered, and the pressing force of the pressing piece 62 can be adjusted and controlled to adjust the force for fixing the workpiece; the lifting of the pressing component 6 depends on the air cylinder 44 which can drive the driving device to lift, so the structure is more compact and the manufacturing cost is lower.

Further, the pressing assembly 6 further comprises a second slider 63, the second slider 63 is slidably mounted on the linear guide 43, and the second connecting plate 61 is mounted on the second slider 63.

The second sliding block 63 is arranged on the linear guide rail 43, and the second connecting plate 61 is arranged on the second sliding block 63, so that the pressing component 6 can only move down along the extension of the linear guide rail 43, the lifting accuracy of the pressing component 6 is ensured, and the pressing component 6 can accurately press a workpiece.

Further, the welding assembly 3 further comprises a cross rod 32 and a vertical rod 33, one end of the cross rod 32 is mounted on the mounting base 1 through a fixing part 34, the vertical rod 33 is mounted at the other end of the vertical rod 33, and the welding gun 31 is mounted at the lower end of the vertical rod 33.

The transverse rod 32 and the vertical rod 33 are connected to form an approximate 7-shaped structure, and one end of the transverse rod 32 is installed on the installation base 1 through a fixing piece 34 so as to install and fix the welding component 3; the vertical rod 33 is installed at the other end of the cross rod 32, specifically, the upper end of the vertical rod 33 is connected with the other end of the cross rod 32, and the connecting position between the vertical rod 33 and the cross rod 32 is not fixed but adjustable, that is, the distance between the vertical rod 33 and the mounting seat 1 is adjustable; the welding gun 31 is arranged at the lower end of the vertical rod 33, so that a workpiece to be welded is positioned between the mounting seat 1 and the welding gun 31, and the collision mouth of the welding gun 31 faces to one side of the mounting seat 1 and is opposite to the part to be welded of the workpiece; the distance between the vertical rod 33 and the mounting base 1 is adjustable, so that the distance between the collision nozzle of the welding gun 31 and the workpiece is adjustable. The arrangement of the cross bar 32 and the vertical bar 33 not only can firmly mount the welding gun 31 on the mounting base 1, but also can make the structure among the mounting base 1, the welding gun 31 and the welding turntable 2 more compact, and the whole volume of the welding mechanism becomes smaller, so that the volume of the welding machine is smaller.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A welding mechanism for welding pipe joints, comprising:

a mounting seat (1);

the welding turntable (2) comprises a rotating shaft (21) and a pipe fitting joint fixing column (22) used for fixing a workpiece, wherein the pipe fitting joint fixing column (22) is installed at the upper end of the rotating shaft (21);

the welding assembly (3) is mounted on the mounting seat (1), the welding assembly (3) comprises a welding gun (31), and a nozzle of the welding gun (31) is over against the welding position of a workpiece;

drive assembly (4), drive assembly (4) are installed on mount pad (1), drive assembly (4) with pivot (21) transmission is connected to the order of magnitude pivot (21) is rotatory.

2. The welding mechanism for welding pipe joints according to claim 1, wherein the welding turntable (2) further comprises a turntable (23), the turntable (23) is sleeved on the pipe joint fixing column (22), and the turntable (23) is detachably mounted at the upper end of the rotating shaft (21).

3. The welding mechanism for welding the pipe joint according to claim 1, wherein the welding turntable (2) further comprises a bearing (24), the bearing (24) is installed in a mounting hole (51) formed in the station turntable (5), and the rotating shaft (21) penetrates through the bearing (24) and the mounting hole (51), so that the bearing (24) is sleeved on the rotating shaft (21).

4. A welding mechanism for welding pipe joints according to claim 3, wherein the station turntable (5) is provided with a plurality of mounting holes (51) at regular intervals around the center thereof, and each mounting hole (51) is correspondingly provided with the welding turntable (2).

5. A welding mechanism for welding tubular joints according to claim 1, wherein said drive assembly (4) comprises a motor (41) and a friction clutch (42), said motor (41) being mounted on said mounting seat (1), said friction clutch (42) being mounted at the output of said motor (41), said friction clutch (42) being in driving connection with said rotating shaft (21).

6. The welding mechanism for welding the pipe joint according to claim 5, wherein a receiving hole (421) extending downwards is formed in the upper end surface of the friction clutch (42), a first conical surface (422) approaching to one side of the receiving hole (421) from top to bottom is formed in the side wall of the receiving hole (421), and a second conical surface (211) approaching to the central axis of the rotating shaft (21) from top to bottom is formed at the lower end of the rotating shaft (21); the rotating shaft (21) is clamped in the accommodating hole (421), so that the first conical surface (422) is in butt fit with the second conical surface (211).

7. A welding mechanism for welding tubular joints according to claim 5, characterized in that said driving assembly (4) further comprises a linear guide (43), a cylinder (44), a first connecting plate (45) and a first slider (46), said linear guide (43) being mounted on said mounting seat (1), said first slider (46) being slidably mounted on said linear guide (43), said first connecting plate (45) being mounted on said first slider (46), said first connecting plate (45) being connected to a first output (441) of said cylinder (44), said motor (41) being mounted on said first connecting plate (45).

8. The welding mechanism for welding pipe joints according to claim 7, further comprising a hold-down assembly (6), the hold-down assembly (6) comprising a second connecting plate (61) and a hold-down member (62), the second connecting plate (61) being mounted on the second output end (442) of the cylinder (44), the hold-down member (62) being mounted on the second connecting plate (61), the hold-down member (62) being located directly above the pipe joint fixing post (22).

9. A welding mechanism for welding tubular joints according to claim 8, wherein said hold-down assembly (6) further comprises a second slider (63), said second slider (63) being slidably mounted on said linear guide (43), said second connecting plate (61) being mounted on said second slider (63).

10. A welding mechanism for welding pipe joints according to claim 1, characterized in that said welding assembly (3) further comprises a cross bar (32) and a vertical bar (33), one end of said cross bar (32) being mounted on said mounting base (1) by means of a fixing member (34), said vertical bar (33) being mounted at the other end of said vertical bar (33), said welding gun (31) being mounted at the lower end of said vertical bar (33).