CN218426398U - Automatic pipe welding machine - Google Patents

Abstract

The utility model provides an automatic pipe welding machine, which relates to the field of automatic pipe welding, and is characterized in that a feeding mechanism, a welding mechanism and a discharging mechanism are sequentially distributed at intervals on the periphery of a rotary dividing plate, and the rotary dividing plate drives a rotary station to rotate on a circular arc track, so that the welding process corresponding to feeding, welding and discharging is sequentially operated in a flow process; through the matching of the positions of the mechanisms distributed at intervals and the rotation angle of each beat of the rotary index plate, when the number of the rotary stations is 4, workpieces to be welded on each rotary station can be subjected to different processes at the same time, and the working efficiency is high. The welding gun has the characteristics that the welding quality is high, and when a workpiece to be welded is welded, the workpiece to be welded rotates, and the welding gun is fixed, so that the welding gun is prevented from slightly shaking due to the motion inertia, the welding quality is improved, and the welding gun can be used for precise welding. The automatic program is high, the efficiency is high, can be used for the full-automatic flow production.

Description

Automatic pipe welding machine

Technical Field

The utility model belongs to the technical field of automatic mechanical equipment technique and specifically relates to an automatic change pipelining's pipe fitting automatic weld machine.

Background

When pipe fittings are machined, a pipe fitting welding machine is often used for girth welding, such as welding between two pipe fittings, and welding between a pipe fitting and a threaded pipe or nut pipe. The existing pipe welding equipment is generally of a semi-automatic structure, and feeding and discharging are achieved manually. Moreover, the structure is that the workpiece is fixed, and the welding gun moves around the workpiece to complete welding. Therefore, the prior art has the following technical problems: (1) During precision welding, a welding gun is a precision tool, and fine jitter generated during movement can influence the welding quality; (2) The automation program is low, and additional mechanical arms and other auxiliary equipment are required to be added for loading and unloading during automatic flow production; (3) the structure is loose, and the occupied space is large; (4) The welding seam air isolation inert gas needs to be injected from the outer end part of the workpiece to be welded, so that the feeding and discharging operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes the above-mentioned technical problem that current pipe fitting welding machine exists provides a more compact structure, degree of automation height, the more stable pipe fitting automatic weld machine of operation, and the technical scheme of adoption is as follows:

the utility model provides a pipe fitting automatic weld machine, includes the frame, its characterized in that still includes:

the rotary indexing disc is rotatably arranged on the rack, is used for driving the workpieces to be welded to flow, and is provided with at least one rotary station for bearing and fixing the workpieces to be welded; the welding method comprises the following steps of A, welding workpieces to be welded, wherein the workpieces to be welded comprise a workpiece A to be welded and a workpiece B to be welded;

the feeding mechanism is arranged on the rack and comprises a feeding mechanism A for bearing and fixing a workpiece A to be welded and a feeding mechanism B for bearing and fixing a workpiece B to be welded;

the welding mechanism is arranged on the rack and used for welding the workpieces to be welded on the rotating station;

the blanking mechanism is arranged on the rack and used for taking down the finished workpiece on the rotary station;

the feeding mechanism A, the feeding mechanism B, the welding mechanism and the blanking mechanism are sequentially distributed on the periphery of the rotary dividing plate at intervals;

the rotating station comprises a station base, a hollow rotating shaft for driving the workpiece to be welded to rotate as a fixed shaft and a guide core for fixing the workpiece to be welded; the station base is fixed at the edge of the rotary dividing plate, the hollow rotating shaft penetrates through the station base and is rotatably arranged on the station base, the guide core is arranged in the hollow rotating shaft in a lifting manner, and the upper part of the guide core extends out of the upper end of the hollow rotating shaft;

the welding mechanism comprises a welding seat frame, a jacking mechanism and a welding gun, the jacking mechanism and the welding gun are both arranged on the welding seat frame, and the jacking mechanism comprises a jacking head for tightly pressing the workpiece B to be welded from top to bottom and a jacking driving device for driving the jacking head to lift; the end of the welding gun transversely extends over the rotary station in a high-speed mode, and the end of the welding gun is horizontally opposite to a welding seam of a workpiece to be welded.

Furthermore, a transverse frame which transversely extends to the upper part of the edge of the rotary index plate in an air mode is arranged at the top of the welding seat frame, a jacking driving device of the jacking mechanism is arranged on the transverse frame in an air mode, and a jacking head is arranged below the jacking mechanism.

Furthermore, the jacking driving device comprises a jacking cylinder, a jacking guide rod and a jacking seat, the jacking cylinder is fixed on the cross frame, the jacking guide rod, the lower end of a cylinder rod of the jacking cylinder and the lower end of the jacking guide rod are fixed on the jacking seat, and the jacking head is arranged below the jacking seat and is opposite to the rotary station in a hanging manner.

Furthermore, a welding gun lifting mechanism for adjusting the height of the welding gun is arranged in the welding seat frame, a welding gun translation mechanism for adjusting the transverse extension length of the welding gun is arranged on the welding gun lifting mechanism, and the welding gun is arranged on the welding gun translation mechanism.

Furthermore, the rotary station further comprises a bent pipe limiting bracket arranged on the rotary indexing disc in a liftable mode, the bent pipe limiting bracket is located on the outer side of the station base, a bent pipe limiting supporting arm for assisting in fixing the upper portion of the workpiece B to be welded is arranged at the top of the bent pipe limiting bracket, and the bent pipe limiting supporting arm extends out of the upper portion of the station base in a volleying mode.

Furthermore, a V-shaped longitudinal groove for accommodating an upper pipe body of the workpiece B to be welded is formed in the axial direction of the bent pipe limiting bracket, and a square transverse groove for accommodating an annular protruding portion of the upper pipe body of the workpiece B to be welded is formed in one end, extending out in the transverse direction, of the bent pipe limiting bracket.

Furthermore, an inverted convex shaft hole with a wide top and a narrow bottom is arranged in the hollow rotating shaft, an inverted convex floating core with a wide top and a narrow bottom is arranged in the inverted convex shaft hole, the lower end of the inverted convex floating core penetrates through the inverted convex shaft hole to be exposed downwards from the bottom end of the hollow rotating shaft, a floating spring allowing the inverted convex floating core to elastically move up and down in the inverted convex shaft hole is arranged in the middle of the inverted convex shaft hole, and the floating spring is sleeved in the middle of the inverted convex floating core; the upper end of the inverted convex floating core is provided with an inverted convex floating limit cover, and the upper end of the hollow rotating shaft is provided with a groove for accommodating the lower convex part of the floating limit cover; the guide core movably penetrates through the floating limiting cover to be connected to the top of the inverted convex floating core; the floating limiting cover limits the inverted convex floating core in the hollow rotating shaft; the bottom end of the inverted convex floating core is provided with an air nozzle with a convex longitudinal section, and the bottom of the air nozzle is provided with an air nozzle buffering pull ring; the welding mechanism further comprises a guide lifting driving mechanism which drives the air faucet buffer pull ring to control the guide core to lift, and the guide lifting driving mechanism is arranged below the welding seat frame.

Furthermore, the axes of the air guide nozzle, the inverted convex floating core and the guide core are hollow shafts, and the hollow shafts of the three are sequentially connected to form a welding air passage for inert gas to enter the inside of a workpiece to be welded.

Furthermore, the longitudinal section of the station base is of an inverted convex structure with a wide upper part and a narrow lower part, the upper part of the station base is a base cover, the lower part of the station base is a base body, and the base body is buckled with a station bottom cover; an outward-expanding rotating shaft chuck is arranged in the upper end of the hollow rotating shaft; a rotating shaft bearing is arranged in the station base and sleeved at the upper part of the hollow rotating shaft; the middle part of the hollow rotating shaft is sleeved with a driven synchronizing wheel which drives the hollow rotating shaft to rotate; the bottom surface of the rotary indexing disc is provided with a driving synchronous wheel (7A) for driving a driven synchronous wheel, and the driving synchronous wheel (7A) is rotatably suspended on the bottom surface of the rotary indexing disc through a bearing.

Furthermore, the guide lifting driving mechanism comprises a floating lifting support, a floating lifting cylinder, a bracket lifting cylinder and a floating lifting transmission arm; the floating lifting support is fixed on the frame and positioned below the rotary dividing plate; the floating lifting transmission arm is arranged on the floating lifting support in a vertically sliding manner and is positioned above the floating lifting cylinder and driven by the floating lifting cylinder; the upper part of the floating lifting transmission arm is provided with a lifting clutch A which is matched and clamped with an air nozzle buffering pull ring of the air guide nozzle; the bracket lifting cylinder and the bent pipe limiting bracket are also movably clamped through another lifting clutch B; the floating lifting support is provided with a gas guide interface matched with the gas guide nozzle during descending, and the lower end of the gas guide interface is a welding gas interface connected with an inert gas source; the rotating station also comprises a workpiece rotating driving mechanism for controlling the hollow rotating shaft to rotate; the workpiece rotation driving mechanism comprises a stepping motor, the stepping motor is arranged on the floating lifting support, and the output end of the stepping motor is movably connected with the driving synchronizing wheel through a rotation clutch.

The working principle of the automatic welding machine for the pipe fittings is as follows: the feeding mechanism A, the feeding mechanism B, the welding mechanism and the blanking mechanism are sequentially distributed at intervals on the periphery of the rotary dividing plate, and the rotary dividing plate drives the rotary station to rotate on an arc track, so that the welding process corresponding to feeding, welding and blanking is sequentially subjected to line production; through the matching of the positions of the mechanisms distributed at intervals and the rotation angle of each beat of the rotary index plate, when the number of the rotary stations is 4, workpieces to be welded on each rotary station can simultaneously carry out different processes, namely, each rotary station and the feeding mechanism A, the feeding mechanism B, the welding mechanism and the blanking mechanism are simultaneously in a working state and are not vacant, so that the working efficiency is improved. For example, when the first rotating station feeds a workpiece a to be welded on the feeding mechanism a, the second rotating station feeds a workpiece B to be welded on the feeding mechanism B, the third rotating station performs a welding process on the welding mechanism, and the fourth rotating station performs blanking welding on the discharging mechanism to obtain a finished product. When the workpiece to be welded is welded, the workpiece to be welded rotates, and the welding gun is fixed, so that fine shaking of the welding gun caused by motion inertia is avoided, the welding quality is improved, and the welding gun can be used for precise welding.

From the above, compared with the prior art, the utility model discloses still have following advantage: (1) The welding gun can be used for precise welding, when a workpiece to be welded is welded, the workpiece to be welded rotates, and the welding gun serving as a precise tool is fixed, so that the welding gun cannot shake slightly, and the welding quality is prevented from being influenced; (2) The automatic program is high, the efficiency is high, the automatic production line can be used for full-automatic flow production, the process is streamlined, and a plurality of stations can work on different processes simultaneously; (3) the structure is compact, scientific and small; (4) The inert gas for isolating the welding seam air is injected from the inside of the workpiece to be welded, so that the obstruction of the loading and unloading operation can not be caused.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, together with the embodiments of the invention, and do not constitute a limitation on the invention, in which:

FIG. 1 is a front view of a preferred embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a perspective view of FIG. 1;

FIG. 4 is a schematic view of the welding mechanism and the rotary station in a cooperative welding state;

FIG. 5 is an enlarged view of FIG. 4 at D;

FIG. 6 is an enlarged view at E of FIG. 4;

FIG. 7 is an exploded view of FIG. 4;

FIG. 8 is an enlarged view at F of FIG. 7;

FIG. 9 is a longitudinal cross-sectional view of the rotating station body;

FIG. 10 is an exploded view of the rotary station body mated with a work piece to be welded;

fig. 11 is a schematic view of the action drive connection when the rotary station is matched with the rotary station.

Description of reference numerals: 1-a frame, 2-a rotary dividing disc, 3-a feeding mechanism, 4-a welding mechanism, 5-a blanking mechanism, 6-a feeding machine, 7-a rotary station, 8-a welding gas interface, 9-a bent pipe limiting bracket, 10-an air guide interface, 11-a workpiece A to be welded, 12-a workpiece B to be welded, 13-a welding air passage;

31-feeding mechanisms A, 32-feeding mechanisms B, 33-feeding grooves A, 34-feeding grooves B, 35-material moving clamping arms A, 36-material moving clamping arms B;

41-a welding seat frame, 42-a cross frame, 43-a jacking mechanism, 44-a jacking driving device, 45-a jacking head, 46-a welding gun, 47-a jacking cylinder, 48-a jacking guide rod, 49-a jacking seat, 4A-a welding gun lifting mechanism, 4B-a welding gun translation mechanism, 4C-a guiding lifting driving mechanism, 4D-a floating lifting cylinder, 4E-a floating lifting support, 4F-a floating lifting transmission arm, 4G-a lifting clutch A, 4H-a bracket lifting cylinder, 4I-a workpiece rotation driving mechanism, 4J-a stepping motor, 4K-a rotation clutch and 4M-a lifting clutch B;

61-feeding machine A, 62-feeding machine B;

70-station base, 71-station bottom cover, 72-hollow rotating shaft, 73-guide core, 74-inverted convex floating core, 75-floating spring, 76-rotating shaft bearing, 77-floating limit cover, 78-air guide nozzle, 79-driven synchronizing wheel, 7A-driving synchronizing wheel, 7B-limit chuck, 7C-base body, 7D-base cover and 7G-air nozzle buffer pull ring;

91-bent pipe limiting bracket arm, 92-V-shaped longitudinal groove and 93-square transverse groove.

Detailed Description

The present invention and its advantageous technical effects are further described in detail below with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1-11, the utility model discloses a pipe fitting automatic weld machine of preferred implementation, outside frame 1, still include:

referring to fig. 1 to 3, a rotary index plate 2 is rotatably arranged on a frame 1 and used for driving a workpiece to be welded to perform line production, and 4 rotary stations 7 for bearing and fixing the workpiece to be welded are arranged on the rotary index plate; the workpieces to be welded comprise a workpiece A to be welded and a workpiece B to be welded; in this embodiment, the workpiece a to be welded is a stainless steel threaded pipe, and the workpiece B to be welded is a stainless steel bent pipe, as an example basis of the specific embodiment.

Referring to fig. 1 to 3, the feeding mechanism 3 is arranged on the frame 1, and includes a feeding mechanism a31 for carrying and fixing a workpiece a to be welded and a feeding mechanism B32 for carrying and fixing a workpiece B to be welded;

referring to fig. 1 to 3, a welding mechanism 4 is arranged on the frame 1 and used for welding a workpiece to be welded on a rotating station;

referring to fig. 1 to 3, a blanking mechanism 5 is arranged on the frame 1 and used for taking down a workpiece finished product on the rotary station;

referring to fig. 2 to 3, the feeding mechanism a31, the feeding mechanism B32, the welding mechanism 4 and the blanking mechanism 5 are sequentially distributed at intervals on the periphery of the rotary indexing disc 2 in a clockwise distribution manner;

referring to fig. 4-10, the rotating station 7 includes a station base 70, a hollow rotating shaft 72 for driving the workpiece to be welded to rotate as a fixed shaft, and a guide core 73 for fixing the workpiece to be welded; the station base 70 is fixed at the edge of the rotary dividing disc 2, the hollow rotating shaft 72 passes through the station base 70 and is rotatably arranged on the station base 70, the guide core 73 is arranged in the hollow rotating shaft 72 in a lifting manner, and the upper part of the guide core 73 extends out of the upper end of the hollow rotating shaft 72; the shape and size of the guide core 73 can be matched according to the specific conditions of the workpiece A to be welded and the workpiece B to be welded;

referring to fig. 4, 6-8 and 11, the welding mechanism 4 includes a welding seat frame 41, a pressing mechanism 43 and a welding gun 46, the pressing mechanism 43 and the welding gun 46 are both disposed on the welding seat frame 41, the pressing mechanism 43 includes a pressing head 45 for pressing the workpiece B to be welded from top to bottom, and a pressing driving device 44 for driving the pressing head 45 to move up and down; the end of the welding torch 46 extends laterally beyond the rotary station 7, the end of the welding torch 46 being horizontally opposite to the weld of the workpiece to be welded.

Referring to fig. 4, 6-8, preferably, a cross frame 42 extending transversely over the edge of the rotary indexing plate 2 is provided on the top of the welding seat frame 41, a pressing driving device 44 of a pressing mechanism 43 is suspended on the cross frame 42, and a pressing head 45 is provided below the pressing mechanism 43.

Referring to fig. 4, 6 to 7, preferably, the pressing driving device 44 includes a pressing cylinder 47, a pressing guide rod 48 and a pressing base 49, the pressing cylinder 47 is fixed on the cross frame 42, the pressing guide rod 48, a lower end of the cylinder rod of the pressing cylinder 47 and a lower end of the pressing guide rod 48 are fixed on the pressing base 49, and the pressing head 45 is disposed below the pressing base 49 and opposite to the rotating station 7 in a suspended manner.

Referring to fig. 7, preferably, a welding gun lifting mechanism 4A for adjusting the height of the welding gun 46 is arranged in the welding seat frame 41, a welding gun translation mechanism 4B for adjusting the transverse extension length of the welding gun 46 is arranged on the welding gun lifting mechanism 4A, and the welding gun 46 is arranged on the welding gun translation mechanism 4B.

Referring to fig. 4-7, preferably, the rotating station 7 further includes a bent pipe limiting bracket 9 arranged on the rotating index plate 2 in a liftable manner, the bent pipe limiting bracket 9 is located outside the station base 70, a bent pipe limiting bracket 91 for assisting in fixing the upper portion of the workpiece B to be welded is arranged at the top of the bent pipe limiting bracket 9, and the bent pipe limiting bracket 91 extends out of the station base 70 in a volleying manner.

Referring to fig. 4, preferably, the elbow limiting bracket 91 is axially provided with a V-shaped longitudinal groove 92 for accommodating an upper pipe body of the workpiece B to be welded, and the end of the elbow limiting bracket 91 protruding in the transverse direction is provided with a square transverse groove 93 for accommodating an annular projection of the upper pipe body of the workpiece B to be welded.

Referring to fig. 9 to 10, in order to improve the self-adaptive adjustment capability and self-sustaining capability of the guide core 73, preferably, an inverted convex shaft hole with a wide top and a narrow bottom is formed in the hollow rotating shaft 72, an inverted convex floating core 74 with a wide top and a narrow bottom is formed in the inverted convex shaft hole, the lower end of the inverted convex floating core 74 passes through the inverted convex shaft hole and is exposed downwards from the bottom end of the hollow rotating shaft 72, a floating spring 75 allowing the inverted convex floating core 74 to elastically move up and down in the inverted convex shaft hole is arranged in the middle of the inverted convex shaft hole, and the floating spring 75 is sleeved in the middle of the inverted convex floating core 74; the upper end of the inverted convex floating core 74 is provided with an inverted convex floating limit cover 77, and the upper end of the hollow rotating shaft 72 is provided with a groove for accommodating the lower convex part of the floating limit cover 77; the guide core 73 can movably pass through the floating limit cover 77 and is connected to the top of the inverted convex floating core 74; the floating limit cover 77 limits the inverted convex floating core 74 in the hollow rotating shaft 72; the bottom end of the inverted convex floating core 74 is provided with an air guide nozzle 78 with a convex longitudinal section, and the bottom of the air guide nozzle 78 is provided with an air nozzle buffer pull ring 7G; the welding mechanism 4 further comprises a guiding lifting driving mechanism 4C for driving the air faucet buffering pull ring 7G to control the lifting of the guiding core 73, and the guiding lifting driving mechanism 4C is arranged below the welding seat frame 41. Under the action of the floating spring 75, the convex floating core 74 can vertically float in the hollow rotating shaft 72, so that the guide core 73 is driven to vertically float after being pressed by the workpiece A to be welded and the workpiece B to be welded, and the self-adaptive adjustment capability and the self-sustaining capability of the guide core 73 are improved.

Referring to fig. 9-10, preferably, the axes of the air guide nozzle 78, the inverted convex floating core 74 and the guiding core 73 are hollow shafts, and the hollow shafts of the three are sequentially connected to form a welding air channel 13 for allowing inert gas to enter the interior of the workpiece to be welded.

Referring to fig. 9 to 10, preferably, the longitudinal section of the station base 70 is an inverted convex structure with a wide top and a narrow bottom, the upper part of the station base 70 is a base cover 7D, the lower part of the station base 70 is a base body 7C, and the base body 7C is fastened with a station bottom cover 71; an outward-expanding rotating shaft chuck 7B is arranged in the upper end of the hollow rotating shaft 72; a rotating shaft bearing 76 is arranged in the station base 70, and the rotating shaft bearing 76 is sleeved on the upper part of the hollow rotating shaft 72; the middle part of the hollow rotating shaft 72 is sleeved with a driven synchronizing wheel 79 which drives the hollow rotating shaft 72 to rotate; the bottom surface of the rotary indexing disc 2 is provided with a driving synchronizing wheel 7A for driving the driven synchronizing wheel 79, and the driving synchronizing wheel 7A is rotatably hung on the bottom surface of the rotary indexing disc 2 through a bearing.

Referring to fig. 4, 6 to 8 and 11, preferably, the guide elevation driving mechanism 4C includes a floating elevation bracket 4E, a floating elevation cylinder 4D, a bracket elevation cylinder 4H and a floating elevation driving arm 4F; the floating lifting support 4E is fixed on the frame 1 and is positioned below the rotary dividing plate 2; the floating lifting cylinder 4D is arranged on the floating lifting support 4E, and the floating lifting transmission arm 4F is arranged on the floating lifting support 4E in a vertically sliding manner and is positioned above the floating lifting cylinder 4D and driven by the floating lifting cylinder 4D; the upper part of the floating lifting transmission arm 4F is provided with a lifting clutch A4G which is matched and clamped with an air nozzle buffering pull ring 7G of the air guide nozzle 78; the bracket lifting cylinder 4H and the bent pipe limiting bracket 9 are also movably clamped through another lifting clutch B4M; the floating lifting support 4E is provided with a gas guide interface 10 which is matched with the gas guide nozzle 78 when the floating lifting support descends, and the lower end of the gas guide interface 10 is provided with a welding gas interface 8 connected with an inert gas source; the rotary station 7 further comprises a workpiece rotary driving mechanism 4I for controlling the hollow rotary shaft 72 to rotate; the workpiece rotation driving mechanism 4I comprises a stepping motor 4J, the stepping motor 4J is arranged on the floating lifting support 4E, and the output end of the stepping motor 4J is movably connected with the driving synchronizing wheel through a rotating clutch 4K. The bottom of the gas guide nozzle 78 is connected with the gas guide interface 10, the gas guide interface 10 is communicated with the welding gas channel 13, and inert gas is injected into the workpiece B to be welded and the workpiece A to be welded, so that the welding environment is further improved, and the welding quality is improved.

Referring to fig. 1 to 3, each station has the following working process according to the process:

(1) A feeding process, wherein a feeding machine 6 conveys the workpiece to be welded to a feeding mechanism 3, and the feeding process comprises two steps;

1) In the feeding process step 1, workpieces A to be welded are sequentially arranged in a feeding groove A33 through a feeding machine A31, then the workpieces A to be welded are clamped from the feeding groove A33 and transferred to a rotating station 7 through a material transferring clamping arm A35 capable of moving in XY, and at the moment, a guide core 73 in the rotating station 7 penetrates through the workpieces A to be welded from bottom to top and exposes out of the upper part of the guide core 73 from the upper part of the workpieces A to be welded, so that the workpieces A to be welded are limited and fixed;

2) A feeding process step 2, arranging the workpieces B to be welded in a water flowing sequence in a feeding groove B34 through a feeding machine B32, rotating the indexing disc 2 by an angle, transferring the rotating station 7 to a position corresponding to the feeding mechanism B, clamping the workpieces B to be welded from the feeding groove B34 and transferring the workpieces B to the rotating station 7 through a material transferring clamping arm B36 capable of moving in XY directions, sleeving the workpieces B to be welded on the upper part of the guide core 73, limiting and fixing the workpieces B to be welded, and aligning the bottoms of the workpieces B to be welded with the tops of the workpieces A to be welded under the action of gravity; if the workpiece B to be welded is a bent pipe, the upper part of the workpiece B to be welded is fixed on the bent pipe limiting bracket 9; at this time, the second rotating station 7 is just in the "feeding process step 1";

(2) The welding process, the welding mechanism 4 welds the work piece B to be welded and the work piece A to be welded, and the welding process comprises four steps;

1) A pressing step, namely rotating the indexing disc 2 for a certain angle continuously, rotating the rotating station 7 to a position corresponding to the welding mechanism 4, pressing down the top pressing mechanism 43 in the welding mechanism 7, and pressing the workpiece B to be welded on the workpiece A to be welded through the top pressing head 45; at this time, the second rotating station 7 is just in the "feeding process step 2"; the third rotary station 7 is just positioned in the feeding process step 1';

2) In the step 1 of spot welding, a welding gun 46 is aligned to the joint between a workpiece B to be welded and a workpiece A to be welded for spot welding;

3) Spot welding step 2, rotating the rotating station 7 by a certain interval angle, and then continuing spot welding for 1 to 2 points (if the workpiece B to be welded is a bent pipe, before the rotating station 7 rotates, an upper bent pipe limiting bracket 9 for fixing the workpiece B to be welded descends to be separated from the workpiece B to be welded, so that the upper part of the workpiece B to be welded is suspended), so that the relative position between the workpiece B to be welded and the workpiece A to be welded is fixed;

4) A full-welding preparation step, wherein the jacking mechanism 43 retracts upwards, and the jacking head 45 is separated from the workpiece B to be welded; the guide core 73 descends to a position lower than the welding seam, the bottom of the gas guide nozzle 78 is connected with the gas guide interface 10, the gas guide interface 10 is communicated with the welding gas channel 13, the welding gas interface 8 is connected with an inert gas source through a gas pipe, and then inert gas, preferably argon gas, can be injected into the workpiece B to be welded and the workpiece A to be welded through the welding gas channel 13;

5) A full welding step, namely driving the workpiece B to be welded and the workpiece A to be welded to continuously rotate by the hollow rotating shaft 72, aligning the welding gun 46 with the joint between the workpiece B to be welded and the workpiece A to be welded for continuous welding, completing full welding, and cutting off the injection of inert gas;

(3) In the blanking process, the rotary indexing disc 2 is rotated for an angle, the rotary station 7 is rotated to the position corresponding to the blanking mechanism 5, and then the welded workpiece to be welded is rotated away from the rotary station 7 by the blanking mechanism. At this time, the second rotary station 7 is just in the "welding process"; the third rotary station 7 is just positioned in the feeding process step 2'; the fourth rotation station 7 is just in "loading process step 1".

The automatic pipe welding machine with 4 rotating stations 7 can continuously work, namely after the previous rotating station 7 of the automatic pipe welding machine completes a process beat, the next rotating station 7 is followed by the previous rotating station 7 to repeat the same process steps, and therefore the reciprocating circular revolving horse lamp type automatic pipe welding line production is formed.

In the above description, details of the conventional components and machining processes related to cylinder driving, motor rotation driving, etc. in the prior art are not repeated for the sake of brevity. Other processing techniques and parts not disclosed are processed according to the conventional technology in the prior art.

Finally, it should be noted that: although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications, equivalents, improvements and the like can be made in the technical solutions of the foregoing embodiments or in some technical features of the foregoing embodiments, but all modifications, equivalents, improvements and the like within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims (10)

1. The utility model provides a pipe fitting automatic weld machine, includes frame (1), its characterized in that still includes:

the rotary indexing disc (2) is rotatably arranged on the rack (1) and is used for driving the workpieces to be welded to flow, and at least one rotary station (7) for bearing and fixing the workpieces to be welded is arranged on the rotary indexing disc; the welding method comprises the following steps of A, welding workpieces to be welded, wherein the workpieces to be welded comprise a workpiece A to be welded and a workpiece B to be welded;

the feeding mechanism (3) is arranged on the rack (1) and comprises a feeding mechanism A (31) used for bearing and fixing a workpiece A to be welded and a feeding mechanism B (32) used for bearing and fixing a workpiece B to be welded;

the welding mechanism (4) is arranged on the rack (1) and is used for welding a workpiece to be welded on the rotating station;

the blanking mechanism (5) is arranged on the rack (1) and is used for taking down the finished workpiece on the rotary station;

the feeding mechanism A (31), the feeding mechanism B (32), the welding mechanism (4) and the blanking mechanism (5) are sequentially distributed on the periphery of the rotary dividing plate (2) at intervals;

the rotating station (7) comprises a station base (70), a hollow rotating shaft (72) for driving the workpiece to be welded to rotate as a fixed shaft, and a guide core (73) for fixing the workpiece to be welded; the station base (70) is fixed at the edge of the rotary dividing plate (2), the hollow rotating shaft (72) penetrates through the station base (70) and is rotatably arranged on the station base (70), the guide core (73) is arranged in the hollow rotating shaft (72) in a liftable manner, and the upper part of the guide core (73) extends out of the upper end of the hollow rotating shaft (72);

the welding mechanism (4) comprises a welding seat frame (41), a jacking mechanism (43) and a welding gun (46), the jacking mechanism (43) and the welding gun (46) are both arranged on the welding seat frame (41), and the jacking mechanism (43) comprises a jacking head (45) for pressing a workpiece B to be welded from top to bottom and a jacking driving device (44) for driving the jacking head (45) to lift; the end of the welding gun (46) transversely extends over the rotary station (7) and is horizontally opposite to the welding seam of the workpiece to be welded.

2. The automatic pipe welding machine according to claim 1, wherein a cross frame (42) extending transversely over the edge of the rotary dividing plate (2) is arranged at the top of the welding seat frame (41), a jacking driving device (44) of a jacking mechanism (43) is arranged on the cross frame (42) in a hanging manner, and a jacking head (45) is arranged below the jacking mechanism (43).

3. The automatic pipe welding machine according to claim 2, wherein the jacking driving device (44) comprises a jacking cylinder (47), a jacking guide rod (48) and a jacking seat (49), the jacking cylinder (47) is fixed on the cross frame (42), the jacking guide rod (48), the lower end of a cylinder rod of the jacking cylinder (47) and the lower end of the jacking guide rod (48) are fixed on the jacking seat (49), and the jacking head (45) is arranged below the jacking seat (49) and is opposite to the rotary station (7) in a suspended manner.

4. The automatic pipe welding machine according to claim 3, wherein a welding gun lifting mechanism (4A) for adjusting the height of the welding gun (46) is arranged in the welding seat frame (41), a welding gun translation mechanism (4B) for adjusting the transverse extension length of the welding gun (46) is arranged on the welding gun lifting mechanism (4A), and the welding gun (46) is arranged on the welding gun translation mechanism (4B).

5. The automatic pipe welding machine according to any one of claims 1 to 4, wherein the rotating station (7) further comprises a bent pipe limiting bracket (9) arranged on the rotating dividing disc (2) in a lifting manner, the bent pipe limiting bracket (9) is located on the outer side of the station base (70), a bent pipe limiting bracket arm (91) for assisting in fixing the upper portion of the workpiece B to be welded is arranged at the top of the bent pipe limiting bracket (9), and the bent pipe limiting bracket arm (91) extends out of the station base (70) in a vertical direction.

6. An automatic pipe welding machine according to claim 5, characterized in that the elbow limiting bracket arm (91) is axially provided with a V-shaped longitudinal groove (92) for accommodating the upper pipe body of the workpiece B to be welded, and the end of the elbow limiting bracket arm (91) which extends transversely is provided with a square transverse groove (93) for accommodating the annular bulge of the upper pipe body of the workpiece B to be welded.

7. The automatic pipe welding machine according to claim 6, wherein an inverted convex shaft hole with a wide upper part and a narrow lower part is formed in the hollow rotating shaft (72), an inverted convex floating core (74) with a wide upper part and a narrow lower part is arranged in the inverted convex shaft hole, the lower end of the inverted convex floating core (74) penetrates through the inverted convex shaft hole and is exposed downwards from the bottom end of the hollow rotating shaft (72), a floating spring (75) allowing the inverted convex floating core (74) to move up and down elastically in the inverted convex shaft hole is arranged in the middle of the inverted convex shaft hole, and the floating spring (75) is sleeved in the middle of the inverted convex floating core (74); the upper end of the inverted convex floating core (74) is provided with an inverted convex floating limit cover (77), and the upper end of the hollow rotating shaft (72) is provided with a groove for accommodating the lower convex part of the floating limit cover (77); the guide core (73) can movably pass through the floating limit cover (77) to be connected to the top of the inverted convex floating core (74); the floating limit cover (77) limits the inverted convex floating core (74) in the hollow rotating shaft (72); the bottom end of the inverted convex floating core (74) is provided with an air guide nozzle (78) with a convex longitudinal section, and the bottom of the air guide nozzle (78) is provided with a nozzle buffer pull ring (7G); the welding mechanism (4) further comprises a guide lifting driving mechanism (4C) for driving the air nozzle buffering pull ring (7G) to control the guide core (73) to lift, and the guide lifting driving mechanism (4C) is arranged below the welding seat frame (41).

8. The automatic pipe welding machine of claim 7, wherein the axes of the air guide nozzle (78), the inverted convex floating core (74) and the guide core (73) are hollow shafts, and the hollow shafts of the three are sequentially connected to form a welding air passage (13) for inert gas to enter the interior of a workpiece to be welded.

9. The automatic pipe welding machine according to claim 8, wherein the longitudinal section of the station base (70) is an inverted convex structure with a wide upper part and a narrow lower part, the upper part of the station base (70) is provided with a base cover (7D), the lower part of the station base (70) is provided with a base body (7C), and the base body (7C) is buckled with a station bottom cover (71); an outward-expanding rotating shaft chuck (7B) is arranged in the upper end of the hollow rotating shaft (72); a rotating shaft bearing (76) is arranged in the station base (70), and the rotating shaft bearing (76) is sleeved on the upper part of the hollow rotating shaft (72); a driven synchronizing wheel (79) which drives the hollow rotating shaft (72) to rotate is sleeved in the middle of the hollow rotating shaft (72); the bottom surface of the rotary indexing disc (2) is provided with a driving synchronizing wheel (7A) for driving a driven synchronizing wheel (79), and the driving synchronizing wheel (7A) is rotatably suspended on the bottom surface of the rotary indexing disc (2) through a bearing.

10. An automatic pipe welding machine according to claim 9, characterized in that the guiding lifting driving mechanism (4C) comprises a floating lifting support (4E), a floating lifting cylinder (4D), a bracket lifting cylinder (4H) and a floating lifting transmission arm (4F); the floating lifting support (4E) is fixed on the frame (1) and is positioned below the rotary dividing plate (2); the floating lifting cylinder (4D) is arranged on the floating lifting support (4E), and the floating lifting transmission arm (4F) is arranged on the floating lifting support (4E) in a vertically sliding manner and is positioned above the floating lifting cylinder (4D) and driven by the floating lifting cylinder (4D); the upper part of the floating lifting transmission arm (4F) is provided with a lifting clutch A (4G) which is matched and clamped with an air nozzle buffer pull ring (7G) of the air guide nozzle (78); the bracket lifting cylinder (4H) and the bent pipe limiting bracket (9) are movably clamped through another lifting clutch B (4M); the floating lifting support (4E) is provided with a gas guide interface (10) which is matched with the gas guide nozzle (78) when the floating lifting support descends, and the lower end of the gas guide interface (10) is provided with a welding gas interface (8) connected with an inert gas source; the rotating station (7) further comprises a workpiece rotating driving mechanism (4I) for controlling the hollow rotating shaft (72) to rotate; the workpiece rotation driving mechanism (4I) comprises a stepping motor (4J), the stepping motor (4J) is arranged on the floating lifting support (4E), and the output end of the stepping motor (4J) is movably connected with the driving synchronizing wheel through a rotation clutch (4K).

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