CN115106618A

CN115106618A - Novel narrow-gap vertical welding device

Info

Publication number: CN115106618A
Application number: CN202210881194.5A
Authority: CN
Inventors: 石惟一; 石硕; 王立玉; 蒋国颂; 季小燕; 周勇; 石蓓; 葛玲兰
Original assignee: Nanjing East Star Mechanical And Electrical Technology Co ltd
Current assignee: Nanjing East Star Mechanical And Electrical Technology Co ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-09-27

Abstract

The invention provides a novel narrow-gap vertical welding device, which is arranged between a first weldment and a second weldment and comprises: a column assembly; the gun rack assembly is arranged between the upright post assemblies and is movably connected with the upright post assemblies; the double-wire welding gun is arranged on the gun rack assembly and is used for welding a welding piece; the reciprocating driving assembly is arranged between the upright post assembly and the gun rack assembly and is used for driving the double-wire welding gun to reciprocate along the direction of a welding seam; and the tracking assemblies are arranged on the double-wire welding gun and are used for tracking and adjusting the distance between the double-wire welding gun and the side wall of the weldment. The invention redesigns the mechanical system and the welding gun of electroslag welding or electrogas welding according to the characteristics of narrow interval welding, changes the narrow gap from only flat welding into flat welding or vertical welding, has high welding efficiency, and thoroughly solves the problems that the welding heat of the electroslag welding or electrogas welding is large, crystal grains are easy to grow, the toughness of a welding joint does not reach the standard, and the welding joint cannot be applied to important structures.

Description

Novel narrow-gap vertical welding device

Technical Field

The invention relates to the technical field of welding, in particular to a novel narrow-gap vertical welding device.

Background

The electro-gas welding (EGW) is introduced into China in about 1980, when welding, a welding part A and a welding part B are in a vertical state, a bottom plate is positioned below the welding part A and the welding part B, welding seams are accumulated and fused above the bottom plate and adjacent positions of the welding part A and the welding part B and the bottom plate, welding is continued, a rear baffle is added at the left end of the welding seams, a front baffle is added at the right end of the welding seams, and the rear baffle and the front baffle are used for preventing molten iron from flowing downwards.

However, electro gas welding also exposes problems in use, mainly:

1. the thickness of the welded plate is limited, the thickness of the plate which can be welded by single wire electrogas welding is 30-40mm, the thickness of the plate which can be welded by double wire electrogas welding is 40-80mm, and the steel plate with the thickness exceeding 80mm cannot be applied.

2. With the development of industry, a plurality of new steel materials appear, the new steel materials have higher requirements on the high-temperature retention time of welding seam metal, the whole plane of the welding seam abcd of the electro-gas welding is a molten pool, the welding heat is large, the welding seam metal material is overheated, and the application of the electro-gas welding is limited in a plurality of important structures.

Narrow gap welding (NG) was introduced in china in about 1980 and is mainly used for thick plate welding. The narrow gap welding gun is a straight flat welding gun, the width of the welded seam is narrower than that of the electrogas welding, the molten pool of the electric arc of the welding wire is a punctiform molten pool, and the diameter of the molten pool is about 10 mm, so that the welding heat is much smaller than that of the electrogas welding, the welding seam metal generally has no tendency of overheating, and the welding quality is good.

However, the current narrow gap welding can only carry out flat welding, and the thickness of the welded plate is limited by the length of a welding gun. And the arc striking plate and the arc retracting plate are connected to the two ends of the welding seam, and are cut off after welding, so that the workload is increased greatly, and the welding production speed is slowed down.

For the welding pieces which are extremely large and heavy and represented by a shield machine, because the welding pieces are too heavy and cannot turn over, a plurality of welding seams for vertical welding and overhead welding are available, no matter manual welding or robot welding, a welding molten pool cannot be large at the overhead welding position, otherwise, iron water flows, the welding molten pool cannot be large, which means that the welding current cannot be large, and therefore, the welding speed is very slow and cannot be improved.

Therefore, it is highly desirable to provide a novel narrow gap vertical welding device, which requires less welding wire filling amount than the gas electric vertical welding, so that the welding period is shorter than the gas electric vertical welding, the consumed welding wire is less than the gas electric vertical welding, the thickness of the welded steel plate is thicker than the gas electric vertical welding, and people pay more attention to the fact that the device generates less heat than the gas electric vertical welding, and the welding seam of the vertical welding overhead welding can be changed into the flat welding seam, so that the difficult problem which troubles the welding engineer for many years is solved.

Disclosure of Invention

The invention aims to provide a novel narrow-gap vertical welding device, which solves the problems that in the prior art, electrogas vertical welding is large in welding wire filling amount, long in welding period, insufficient in thickness of a welded steel plate, large in welding heat productivity and capable of causing iron water to flow.

In order to solve the technical problems, the invention adopts the technical scheme that: a novel narrow-gap vertical welding device is arranged between a first weldment and a second weldment and comprises: a column assembly; the gun rack assembly is arranged between the upright post assemblies and is movably connected with the upright post assemblies; the double-wire welding gun is arranged on the gun rack assembly and is used for welding a welding piece; the reciprocating driving assembly is arranged between the upright post assembly and the gun rack assembly and is used for driving the double-wire welding gun to reciprocate along the direction of a welding seam; and the tracking assemblies are arranged on the double-wire welding gun and are used for tracking and adjusting the distance between the double-wire welding gun and the side wall of the weldment.

As a preferred scheme, the upright post assembly comprises two upright posts which are respectively positioned at the outer sides of two end parts of the welding part, and each upright post is sleeved with a sliding sleeve and is provided with a lifting mechanism; the gun rack assembly comprises a first gun rack and a second gun rack which are symmetrically arranged between two stand columns, a first cross beam and a second cross beam which are respectively arranged on the first gun rack and the second gun rack, and a top beam which is positioned above the first cross beam and the second cross beam, wherein the first gun rack and the second gun rack respectively comprise a gun rack body and a gun rack shaft, the end part of the gun rack body is fixedly connected with one end of the gun rack shaft, the other end of the gun rack shaft is movably connected with a sliding sleeve on the same side of the gun rack shaft, the two end parts of the top beam are movably connected with the sliding sleeve on the same side of the top beam, and a plurality of outer through pipes are arranged on the top beam and the gun rack body in a penetrating way; the reciprocating driving assembly comprises two motors which are respectively arranged on two sliding sleeves, wherein the output end of one of the motors is connected with the first cross beam through a screw rod, and the output end of the other motor is connected with the second cross beam through a screw rod.

As a preferred scheme, the upright post assembly comprises two upright posts which are respectively positioned at the outer sides of two end parts of the welding part, and each upright post is sleeved with a sliding sleeve and is provided with a lifting mechanism; the gun rack assembly comprises a first gun rack and a second gun rack which are symmetrically arranged between two upright posts, a first cross beam and a second cross beam which are respectively arranged on the first gun rack and the second gun rack, and a top beam which penetrates through the first cross beam and the second cross beam, wherein two end parts of the top beam are movably connected with the same-side sliding sleeves; the reciprocating driving assembly comprises a screw rod, a motor and nut seats, the bottom end parts of the nut seats are fixedly connected with a first cross beam and a second cross beam respectively and are provided with the screw rod in a penetrating mode, the two end parts of the screw rod are movably connected with the sliding sleeves on the same side of the screw rod respectively, the motor is fixedly arranged on the sliding sleeves, the output ends of the motor are in transmission connection with the screw rod, and a plurality of outer through pipes are arranged on the top beam and the gun frame body in a penetrating mode.

According to the preferable scheme, the gun rack further comprises a Z-direction rotation adjusting device, the Z-direction rotation adjusting device comprises two convex shaft sleeves which are fixedly arranged at the upper end parts of the first gun rack and the second gun rack respectively, a convex shaft is fixedly arranged on each convex shaft sleeve, the top end parts of the convex shafts are respectively connected with the first cross beam and the second cross beam, fixing rods are arranged at the bottom end parts of the first cross beam and the second cross beam, and torsion springs are arranged between the fixing rods and the convex shafts.

As a preferred scheme, the upright post assembly comprises two upright posts which are respectively positioned at the outer sides of two end parts of the welding part, and each upright post is sleeved with a sliding sleeve and is provided with a lifting mechanism; the gun rack assembly comprises a first gun rack and a second gun rack which are symmetrically arranged between two upright posts, the side parts of the first gun rack and the second gun rack are fixedly connected with a top beam, the end part of the top beam is fixedly connected with a guide rail, two sliding sleeves are respectively and movably connected with a first cross beam and a second cross beam, the end parts of the first cross beam and the second cross beam are respectively and fixedly connected with a connecting rod, the side part of the connecting rod is fixedly connected with a sliding block, the sliding block can slide on the guide rail, and a plurality of outer through pipes are arranged on the gun rack body in a penetrating manner; the reciprocating driving component is a trolley arranged at the bottom end part of the upright post.

Preferably, the device further comprises a Y-direction adjusting device, the Y-direction adjusting device comprises a Y-direction backward mechanism, a position sensor and a position reference sheet, the Y-direction backward mechanism is arranged between the connecting rod and the guide rail and electrically connected with the position sensor, and the position sensor is arranged on the connecting rod and matched with the position reference sheet arranged on the guide rail.

Preferably, the device further comprises a Y-direction adjusting device, wherein the Y-direction adjusting device comprises an extension spring arranged between the first cross beam and the guide rail on the same side of the first cross beam, and a compression spring arranged between the second cross beam and the guide rail on the same side of the second cross beam.

As a preferred scheme, the upright post assembly comprises an upright post arranged on the outer side of the weldment, a sliding sleeve is sleeved on the upright post, and a lifting mechanism is arranged on the sliding sleeve; the gun rack assembly comprises a top beam connected with a lifting mechanism, and a first cross beam and a second cross beam which are connected to the top beam in a sliding manner, wherein the end parts of the first cross beam and the second cross beam are both connected with connecting rods, the side part of each connecting rod is provided with a slide block, each slide block is connected with a guide rail in a matching manner, and the end parts of the two guide rails are respectively connected with a first gun rack and a second gun rack; the reciprocating driving component is a trolley arranged at the bottom end part of the upright post.

As preferred scheme, the tracking subassembly includes the tracking block, locates the inside fixed adherence wheel and the flexible adherence wheel of tracking block, fixed adherence wheel and first weldment side looks butt, flexible adherence wheel is including locating the inside elastic component and the adherence wheel body of tracking block, elastic component and adherence wheel body elasticity link to each other, so that adherence wheel body and second weldment side looks butt.

Preferably, the elastic component is a pressure spring component, a torsion spring component or an oil cylinder component; when the pressure spring assembly is adopted, the pressure spring assembly comprises a stretching rod sleeve and a stretching rod which are arranged in the tracking block, one end of the stretching rod is inserted into the stretching rod sleeve, a pressure spring is pressed between the stretching rod sleeve and the stretching rod, and the other end of the stretching rod is connected with an adherence wheel body which is abutted against the side face of the second weldment; when the welding device is a torsion spring assembly, the torsion spring assembly comprises a stretching rod sleeve and a stretching rod which are arranged inside the tracking block, one end part of the stretching rod is inserted into the stretching rod sleeve and is in sliding connection with the stretching rod sleeve, the other end part of the stretching rod is connected with an adherence wheel body which is abutted against the side surface of the second welding part, and a torsion spring is connected between the adherence wheel body and a shaft for fixing the adherence wheel; when being the oil cylinder subassembly, the oil cylinder subassembly is including locating the inside high-pressure cylinder and the piston of tracker, piston one end links to each other with adherence wheel body, and the other end stretches into in the high-pressure cylinder, the high-pressure cylinder is connected with high pressure fuel pipe.

Compared with the prior art, the invention has the beneficial effects that: by combining the advantages of narrow gap welding, electroslag welding and electrogas welding, a new narrow gap vertical welding device is created, the overheating tendency of the device is small, and the welding production speed is improved. The groove of the novel narrow-gap vertical welding device is an I-shaped groove, and the groove angle is about 2-3 degrees, so that the welding wire filling amount of the narrow-gap vertical welding device is less than that of the gas electric vertical welding, the welding construction period is shorter than that of the gas electric vertical welding, the consumed welding wire is less than that of the gas electric vertical welding, and the narrow-gap vertical welding device generates less heat than the gas electric vertical welding. More importantly, the molten pool of the narrow gap welding is a punctiform molten pool with the diameter of about 10 mm, the molten pool of the gas electric vertical welding is a long-strip molten pool, and the heat of the gas electric vertical welding is much larger than that of the narrow gap vertical welding, so that the overheating tendency of the narrow gap vertical welding device disclosed by the invention is much smaller than that of the gas electric vertical welding method. Further, the length of the weld bead welded by the narrow gap vertical welding apparatus is almost infinite, and therefore the thickness of the steel sheet to be welded is also almost infinite, and is thicker than the steel sheet which can be welded by electrogas welding. The narrow-gap vertical welding device provided by the invention can be lifted along with the lifting of the molten pool surface, and can weld a vertical welding seam with a long welding seam, so that the same welding machine can weld a horizontal welding seam and a vertical welding seam.

Drawings

The disclosure of the present invention is illustrated with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like elements throughout. Wherein:

FIG. 1 is a schematic view of a novel narrow gap vertical welding apparatus according to example 1;

FIG. 2 is a top view of the novel narrow gap vertical welding apparatus of FIG. 1;

FIG. 3 is a schematic view of the position of a welding gun when the novel narrow gap vertical welding device starts to weld in embodiment 1;

FIG. 4 is a schematic view of the welding gun position at the end of welding in the novel narrow gap vertical welding device in embodiment 1;

FIG. 5 is a first structural schematic view of a tracking assembly in embodiment 1;

FIG. 6 is a top view of FIG. 5;

FIG. 7 is a second structural view of the tracking assembly in embodiment 1;

FIG. 8 is a third structural view of a tracking assembly in embodiment 1;

FIG. 9 is a fourth structural view of the tracking assembly in embodiment 1;

FIG. 10 is a schematic view showing a connecting structure of a gun shaft and a contact tip in embodiment 1;

FIG. 11 is a side view of FIG. 10;

FIG. 12 is a schematic structural view of a novel narrow gap vertical welding apparatus according to example 2;

FIGS. 12A-12D show 4 variations of the novel narrow gap vertical welding apparatus shown in FIG. 12;

FIG. 13 is a schematic view showing the position of a welding gun when the novel narrow gap vertical welding device starts to weld in embodiment 2;

FIG. 14 is a schematic view showing the position of a welding gun at the end of welding in the novel narrow gap vertical welding device in example 2;

FIG. 15 is a schematic structural view of a novel narrow gap vertical welding apparatus according to example 3;

FIG. 16 is a top view of FIG. 15;

FIG. 17 is a side view of FIG. 15;

FIG. 18 is a schematic structural view of a novel narrow gap vertical welding apparatus according to example 4;

FIG. 19 is a top view of FIG. 18;

FIG. 20 is a side view of FIG. 18;

fig. 21 is a schematic structural view of a novel narrow gap vertical welding apparatus in example 5.

Reference numbers in the figures: 100 first weldment, 200 second weldment, 1 first gun rack, 2 second gun rack, 3 first gun rod, 4 second gun rod, 5 tracking assembly, 5.1 tracking block, 5.2 adherence wheel body, 5.3 extending rod, 5.4 extending rod sleeve, 5.5 fixed adherence wheel, 6 first cross beam, 7 second cross beam, 8 lead screw, 9 gun rack shaft, 10 outer through pipe, 11 top beam, 12 welding wire, 13 gas baffle plate, 14 upright post, 15 sliding sleeve, 16 motor, 17 welding wire connector, 18 adjusting plate, 19 inner embedded groove, 20 compression spring, 21 tension spring, 22 lifting mechanism, 23 rear baffle plate, 24 front baffle plate, 25 welding seam, 26 high pressure oil pipe, 27 nut seat, 28 convex column, 29 torsion spring, 30 convex shaft, 31 fixing rod, 32 convex shaft sleeve, 33 trolley, 34 connecting rod, 35 sliding block,

guide rail

36, 37 position reference plate, 38 welding and welding flux pipe, 39 micro mechanism, 40 outer flux pipe connecting rod, 41 hot plastic wire nozzle, 42 hot plastic flux pipe, 43 elastic blocks, 44 contact tip pressing blocks, 45 inner through pipes, 46 wire feeding holes, 47 screws, 48 bottom plates, 49Z-direction driving devices, 50X-direction driving devices, 51 baffle shafts, 52 pressing plates and 53 position sensors.

Detailed Description

It is easily understood that according to the technical solution of the present invention, a person skilled in the art can propose various alternative structures and implementation ways without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.

Example 1

An embodiment according to the invention is shown in connection with fig. 1 to 11. A novel narrow-gap vertical welding device is arranged between a first welding piece 100 and a second welding piece 200, wherein the first welding piece 100 and the second welding piece 200 are welding pieces with a flat welding line on an I-type slope, or welding pieces with a vertical welding line, or frame-shaped welding pieces with both the flat welding line and the vertical welding line.

The device comprises a stand column assembly, a gun rack assembly, a double-wire welding gun, a reciprocating driving assembly and a plurality of tracking assemblies 5. The gun rack assembly is arranged between the upright post assemblies and is movably connected with the upright post assemblies; the double-wire welding gun is arranged on the gun rack assembly and used for welding a welding piece; the reciprocating driving assembly is arranged between the upright post assembly and the gun rack assembly and is used for driving the double-wire welding gun to reciprocate along the direction of the welding line 25; the tracking assembly 5 is arranged on the double-wire welding gun and used for tracking and adjusting the distance between the double-wire welding gun and the side wall of the weldment.

Referring to fig. 1 and 2, the column assembly includes two columns 14 respectively located outside two ends of the welding member, and each column 14 is sleeved with a sliding sleeve 15 and is provided with a lifting mechanism 22. The lifting mechanism 22 is used for driving the sliding sleeve 15 to slide up and down along the upright post 14.

The gun rack assembly comprises a first gun rack 1 and a second gun rack 2 which are symmetrically arranged between two upright posts 14, a first cross beam 6 and a second cross beam 7 which are respectively arranged on the first gun rack 1 and the second gun rack 2, and a top beam 11 which is positioned above the first cross beam 6 and the second cross beam 7. The bottom end parts of the first cross beam 6 and the second cross beam 7 are provided with protruding pieces, grooves corresponding to the protruding pieces are formed in the gun rack bodies of the first gun rack 1 and the second gun rack 2, and the protruding pieces are embedded into the grooves.

Specifically, first rack 1 and second rack 2 all include the rack body and rack axle 9, and the rack body is made by insulating material, and rack body tip and rack axle 9 one end fixed connection, rack axle 9 other end rather than homonymy sliding sleeve 15 swing joint, back timber 11 both ends rather than homonymy sliding sleeve 15 swing joint. The movable connection is a rotatable connection around the sliding sleeve 15. A plurality of outer through pipes 10 are arranged on the top beam 11 and the gun carriage body in a penetrating way, and the outer through pipes 10 are used for introducing protective gas.

In the embodiment of the present invention, the reciprocating driving assembly includes two motors 16 respectively disposed on two sliding sleeves 15, wherein an output end of one motor 16 is connected to the first beam 6 through a lead screw 8, and an output end of the other motor 16 is connected to the second beam 7 through the lead screw 8. The device can be driven to move left and right along the welding seam 25 under the driving of the motor 16.

The double-wire welding gun is connected with a welding power supply and comprises a first gun rod 3 and a second gun rod 4, wherein the first gun rod 3 and the second gun rod 4 are of L-shaped structures, the horizontal section of the double-wire welding gun penetrates through the sliding sleeve 15 and is rotatably connected with the sliding sleeve, and the vertical section of the double-wire welding gun is connected with the first gun frame 1 and the second gun frame 2 in a plug-in mode and is fixed through screws 47. A plurality of tracking assemblies 5 are mounted to the vertical sections of the first and

second lances

3, 4 for tracking and adjusting the distance between the twin wire welding gun and the sidewall of the weldment. It is readily understood that the twin wire torch may also be a single wire narrow gap torch.

Referring to fig. 10 and 11, a wire feeding hole 46 is formed in the first gun shaft 3 and the second gun shaft 4, and the welding wire 12 enters the wire feeding hole 46 through a welding wire connector 17 provided at the upper end of the gun shafts and passes out from the bottom end of the gun shafts. The section of the gun rod can be rectangular or rhombic, the gun rod is made of chromium-zirconium-copper, tungsten-copper, pure copper or other copper alloys, and a layer of ceramic is sprayed on the outer surface of the gun rod. A layer of ceramic is sprayed on the surface of a welding gun and the surface of a conductive nozzle, and a plurality of tracking assemblies 5 are additionally arranged on a welding gun rod, so that the welding gun rod is prevented from accidentally contacting with a weldment, the welding gun rod is prevented from being short-circuited with the weldment, and the welding gun rod is prevented from being burnt.

The double-wire welding gun further comprises a conductive nozzle 41 arranged at the bottom end of the gun rod, the conductive nozzle 41 and the gun rod are connected in an inverted trapezoid mode in an inserted mode or connected through a screw 47, the inverted trapezoid connection can be located in the wide portion or the narrow portion of the gun rod, the thermal expansion coefficient of the gun rod is smaller than that of the conductive nozzle, the connecting portion of the gun rod and the conductive nozzle 41 are made of high-conductivity beryllium bronze, high-strength beryllium bronze, aluminum copper, chromium zirconium copper, tungsten copper, pure copper or other copper alloys, and a layer of ceramic is sprayed on the outer surface of the conductive nozzle. The inverted trapezoidal plug allows for a minimum weld gun thickness and a narrower weld gun, and thus a narrower weld bead 25, to be machined. The gun to which the screw 47 is attached is reliable and inexpensive, but the thickness of the gun is large.

Specifically, a groove having a wide top and a narrow bottom is cut in the outer wall surface of the gun barrel along the thread passing hole 46, and the contact tip pressing block 44 is fitted into the groove. The angle Q1 of the wire feeding hole 46 to the bottom edge is smaller than the angle Q2 of the pressing block to the bottom edge, and two sides of the narrow edge of the contact tip 41 are respectively detachably connected with an air baffle sheet 13.

In welding, the welding wire 12 is stuck on the contact tip 41, the wire feeding wheel rotates and slips, and the wire feeding is not moved, because the diameter of the wire feeding hole is slightly larger than that of the welding wire 12, if the contact pressure between the welding wire 12 and the wire feeding hole is insufficient, ignition (arc generation) occurs between the welding wire 12 and the wire feeding hole, and the metal at the contact point of the welding wire 12 and the contact tip 41 is locally melted and stuck together, so that the wire feeding is not moved. This patent increases the contact tip briquetting 44 of the narrow wedge type about wide in contact tip 41, has the semicircle orifice above the contact tip briquetting 44, and welding wire 12 passes through in the semicircle orifice, relies on the frictional force of the welding wire 12 of downstream and semicircle pore wall, makes contact tip briquetting 44 lapse and good with the welding wire 12 contact, and welding wire 12 also carries on spacingly to contact tip briquetting 44 simultaneously.

Preferably, a plurality of adjustment tabs 18 are provided between the barrel and the frame, the adjustment tabs 18 being secured by screws 47. The positions of the first gun rod 3 and the second gun rod 4 in the X direction can be changed by adjusting the number of the adjusting pieces 18.

The position of the narrow gap vertical welding apparatus relative to the weldment at the start of welding is shown in FIG. 3. After the motor 16 is started, the motor 16 drives the lead screw 8 to rotate, so that the double-wire welding gun of the device moves from an initial position (namely the position of the rear baffle 23) to an end position (namely the position of the front baffle), and the position of the welding seam 25 is welded while moving. At the end of welding, the position of the narrow-gap vertical welding device relative to the weldment is shown in fig. 4, and comparing fig. 3 with fig. 4, it can be seen that the narrow-gap vertical welding device occupies about twice as much of the length of the weldment and is suitable for being used when a large space exists outside the weldment.

Referring to fig. 5 to 9, above-mentioned tracking assembly 5 includes tracking block 5.1, locates the fixed adherence wheel 5.5 and the flexible adherence wheel of tracking block 5.1 inside, and fixed adherence wheel 5.5 and first weldment 100 side looks butt, flexible adherence wheel is including locating the elastic component and adherence wheel body 5.2 of tracking block 5.1 inside, and the elastic component links to each other with adherence wheel body 5.2 elasticity to make adherence wheel body 5.2 and second weldment 200 side looks butt.

Specifically, a part is cut inwards at two end parts of the wide surface of the gun rod or the current conducting nozzle 41, so that the gun rod or the current conducting nozzle 41 forms an inner groove, a plurality of pairs of tracking blocks 5.1 are embedded in the inner grooves at two sides of the gun rod or the current conducting nozzle 41 close to the side wall of a weldment respectively, and the tracking blocks 5.1 are installed on the gun rod by adopting a thin wire, an elastic thin wire or a thermoplastic tube, so that the thickness of the welding gun is reduced, and the width of a gap is not increased. The tracking block 5.1 is made of a temperature-resistant insulating material. Four adherence wheels can be installed on each tracking block 5.1, wherein 2 are fixed adherence wheels 5.5, and 2 are telescopic adherence wheels.

In an embodiment of the present invention, the elastic member is a compression spring assembly, a torsion spring assembly, or an oil cylinder assembly.

When the pressure spring assembly is used, the pressure spring assembly comprises a stretching rod sleeve 5.4 and a stretching rod 5.3 which are arranged inside a tracking block 5.1, one end of the stretching rod 5.3 is inserted into the stretching rod sleeve 5.4, a pressure spring is pressed between the stretching rod sleeve and the stretching rod sleeve, the other end of the stretching rod 5.3 is connected with an adherence wheel body 5.2 which is abutted against the side face of the second welding part 200, an elastic block is embedded between the two stretching rod sleeves 5.4, and the elastic block is a plate spring, a wave spring, an air bag or an elastic rubber block, as shown in fig. 5 and 6.

When being the torsional spring subassembly, the torsional spring subassembly is including locating the inside telescopic rod cover 5.4 and the telescopic rod 5.3 of tracking block 5.1, and one tip of telescopic rod 5.3 inserts telescopic rod cover 5.4 inside rather than sliding connection, and another tip of telescopic rod 5.3 is connected with adherence wheel body 5.2 with second weldment 200 side looks butt, and is connected with torsional spring 29 between adherence wheel body 5.2 and the fixed axle of adherence wheel 5.5, as shown in fig. 8 and 9.

When the oil cylinder assembly is used, the oil cylinder assembly comprises a high-pressure oil cylinder and a piston which are arranged inside the tracking block 5.1, one end of the piston is connected with the wall-attached wheel body 5.2, the other end of the piston extends into the high-pressure oil cylinder, the high-pressure oil cylinder is connected with a high-pressure oil pipe 26, and an elastic block is embedded between the two high-pressure oil cylinders, as shown in fig. 7. Under the action of oil pressure, the wall sticking wheel body 5.2 on the first gun rod 3 is stuck on the side wall of the second weldment 200 and rolls, and the fixed wall sticking wheel 5.5 on the first gun rod 3 is stuck on the side wall of the first weldment 100 and rolls, so that the distance between the welding wire 12 in the first gun rod 3 and the side wall of the first weldment 100 is kept unchanged; similarly, the distance of welding wire 12 in second gun shaft 4 from the side wall of second weldment 200 remains constant.

Example 2

Referring to fig. 12, a novel narrow gap vertical welding device is arranged between a first weldment 100 and a second weldment 200, and comprises a column assembly, a gun rack assembly, a twin-wire welding gun, a reciprocating drive assembly and a tracking assembly 5, wherein the tracking assembly 5 has the same structure as that of the embodiment 1.

In the embodiment of the present invention, the column assembly includes two columns 14 respectively located at the outer sides of the two end portions of the welding member, and each column 14 is sleeved with a sliding sleeve 15 and is provided with a lifting mechanism 22. The gun rack assembly comprises a first gun rack 1 and a second gun rack 2 which are symmetrically arranged between two upright posts 14, a first cross beam 6 and a second cross beam 7 which are respectively arranged on the first gun rack 1 and the second gun rack 2, and a top beam 11 which is arranged inside the first cross beam 6 and the second cross beam 7 in a penetrating way, and the two ends of the top beam 11 are movably connected with a sliding sleeve 15 at the same side of the top beam.

The reciprocating driving assembly comprises a screw 8, a motor 16 and nut seats 27, wherein the bottom end parts of the two nut seats 27 are respectively movably connected with the first cross beam 6 and the second cross beam 7, the screw 8 penetrates through the two nut seats 27, the two end parts of the screw 8 are respectively movably connected with the sliding sleeves 15 on the same side of the screw, the motor 16 is fixedly arranged on the sliding sleeves 15, and the output end of the motor is in transmission connection with the screw 8. A plurality of external pipes 10 are arranged on the top beam 11 and the gun rack body in a penetrating way and used for introducing protective gas.

Referring to fig. 12A, the apparatus further includes a Z-direction rotation adjusting device to further improve the tracking effect on the side wall of the workpiece. The Z-direction rotation adjusting device comprises two convex shaft sleeves 32 which are fixedly arranged at the upper end parts of the first gun rack 1 and the second gun rack 2 respectively, each convex shaft sleeve 32 is rotatably connected with a convex shaft 30, the top parts of the two convex shafts 30 are respectively connected with the first cross beam 6 and the second cross beam 7, the bottom end parts of the first cross beam 6 and the second cross beam 7 are respectively provided with a fixing rod 31, and a torsion spring 29 is arranged between the fixing rod 31 and the convex shaft 30. The torsion of the torsion spring 29 enables the first gun frame 1, the second gun frame 2 and the convex shaft sleeve 32 connected with the first gun frame and the second gun frame to rotate relative to the convex shaft 30, so that the fixed wall attaching wheel 5.5 arranged on the gun rod is tightly attached to the side wall of the weldment, and the distance between the welding wire in the gun rod and the side wall of the weldment is kept unchanged.

In this embodiment, the axial direction of the top beam 11 is an X axis, the direction perpendicular to the paper surface is a Y axis, and the axial direction of the column 14 is a Z axis.

Optionally, the Z-direction rotation adjusting device may further adopt the following deformation structure:

referring to fig. 12B, the Z-direction rotation adjusting device includes a convex pillar 28 fixedly disposed at an end of the sliding sleeve 15, an extension spring 21 or a compression spring 20 is connected between the convex pillar 28 and the top beam 11, an upper end of the extension spring 21 or the compression spring 20 is connected to an end of the convex pillar 28, a lower end thereof is connected to an outer edge of the top beam 11, the top beam 11 is slightly rotated by a spring force, so that the fixed wall-sticking wheel 5.5 mounted on the gun rod is tightly attached to a sidewall of the weldment, and a distance between the welding wire in the gun rod and the sidewall of the weldment is kept unchanged.

Referring to fig. 12C, the Z-direction rotation adjusting device includes a convex pillar 28 fixed at the end of the sliding sleeve 15, a torsion spring 29 is connected between the convex pillar 28 and the top beam 11, the upper end of the torsion spring 29 is connected with the end of the convex pillar 28, the lower end thereof is connected with the outer edge of the top beam 11, the spring force makes the top beam 11 rotate a little, so that the fixed wall-sticking wheel 5.5 installed on the gun rod clings to the side wall of the weldment, and the distance between the welding wire in the gun rod and the side wall of the weldment is kept unchanged.

Referring to fig. 12D, the Z-direction rotation adjusting device includes a protruding shaft sleeve 32 fixedly disposed on the upper end of the first gun rack 1 or the second gun rack 2, the protruding shaft sleeve 32 is rotatably connected with a protruding shaft 30, the top end of the protruding shaft 30 is respectively connected with the first beam 6 or the second beam 7, the bottom end of the first beam 6 or the second beam 7 is provided with a fixing rod 31, and an extension spring 21 or a compression spring 20 is connected between the fixing rod 31 and the outer edge of the protruding shaft sleeve 32. The lower boss sleeve 32 slightly rotates relative to the boss shaft 30 under the spring force.

Under the action of the Z-direction rotation adjusting device, the distance between the welding wire 12 on the first welding gun and the side wall of the first weldment 100 is kept unchanged, and similarly, the distance between the welding wire 12 on the second welding gun and the side wall of the second weldment 200 is kept unchanged, so that the welding stability is ensured.

The position of the narrow gap vertical welding device relative to the weldment at the start of welding is shown in fig. 13. After the motor 16 is started, the motor 16 drives the lead screw 8 to rotate, so that the nut seat 27 is driven to move, the double-wire welding gun of the device moves from the initial position to the end position, and the position of the welding seam 25 is welded while the double-wire welding gun moves. At the end of the welding, the position of the narrow gap vertical welding device relative to the weldment is shown in fig. 14, and comparing fig. 13 with fig. 14, it can be seen that the occupied area is about slightly more than one time the length of the weldment, and the narrow gap vertical welding device is suitable for being used when the outside of the weldment has little space.

Example 3

Referring to fig. 15-17, a novel narrow gap vertical welding device is provided between a first weldment 100 and a second weldment 200, the device comprising a stud assembly, a gun carriage assembly, a twin wire welding gun, a reciprocating drive assembly, and a tracking assembly 5. The tracking member 5 has the same structure as in embodiment 1.

In the embodiment of the present invention, the column assembly includes two columns 14 respectively located at the outer sides of the two end portions of the weldment, each column 14 is sleeved with a sliding sleeve 15 and is provided with a lifting mechanism 22; the gun rack assembly comprises a first gun rack 1 and a second gun rack 2 which are symmetrically arranged between two upright posts 14, top beams 11 are fixedly connected to the side portions of the first gun rack 1 and the second gun rack 2, guide rails 36 are fixedly connected to the end portions of the top beams 11, a first cross beam 6 and a second cross beam 7 are movably connected to two sliding sleeves 15 respectively, the end portions of the first cross beam 6 and the second cross beam 7 are connected with connecting rods 34 respectively, sliding blocks 35 are fixedly connected to the side portions of the connecting rods 34, the sliding blocks 35 can slide in the guide rails 36, and a plurality of outer through pipes 10 are arranged on the gun rack body in a penetrating mode. The reciprocating driving component is a trolley 33 arranged at the bottom end part of the upright post 14. The drive motors of the two trolleys 33 are synchronous motors.

Preferably, the device further comprises a Y-direction adjusting device, wherein the Y-direction adjusting device comprises a Y-direction reciprocating mechanism, a position sensor 53 and a position reference sheet 37, the Y-direction reciprocating mechanism is arranged between the connecting rod 34 and the guide rail 36, and the position sensor 53 is arranged on the connecting rod 34. In the present embodiment, the position sensor 53 is a differential transformer, and it is fitted with a position reference piece 37 provided on the guide rail 36. The Y-direction return mechanism is a power unit including a motor and an auxiliary transmission mechanism, and when the distance between the position sensor 53 and the position reference piece 37 changes, the output current of the differential transformer changes, and the transmission mechanism can be controlled to move forward or backward.

Optionally, the Y-direction adjusting device includes an extension spring 21 disposed between the first beam 6 and the same side rail 36 thereof, and a compression spring 20 disposed between the second beam 7 and the same side rail 36 thereof. Under the action of the extension spring 21 and the compression spring 20, the wall sticking wheel body 5.2 on the first gun rod 3 is attached to the side wall of the second weldment 200 and rolls, and the fixed wall sticking wheel 5.5 on the first gun rod 3 is attached to the side wall of the first weldment 100 and rolls, so that the distance between the welding wire 12 in the first gun rod 3 and the side wall of the first weldment 100 is kept unchanged; similarly, the distance of welding wire 12 in second gun shaft 4 from the side wall of second weldment 200 remains constant.

Example 4

Referring to fig. 18-20, a novel narrow gap vertical welding device is disposed between first weldment 100 and second weldment 200, and includes a stud assembly, a gun carriage assembly, a twin wire welding gun, a reciprocating drive assembly, and a tracking assembly 5. The tracking member 5 has the same structure as in embodiment 1.

In the embodiment of the invention, the upright post assembly comprises an upright post 14 arranged on the outer side of a weldment, a fine adjustment mechanism 39 is arranged on the upright post 14, the gun rack assembly comprises a top beam 11 connected with the fine adjustment mechanism 39, a first cross beam 6 and a second cross beam 7 which are connected to the top beam 11 in a sliding manner, the end parts of the first cross beam 6 and the second cross beam 7 are both connected with a sliding connecting rod 34, the side part of the sliding connecting rod 34 is fixedly connected with a sliding block 35, each sliding block 35 is connected with a guide rail 36 in a matching manner, and the end parts of the two guide rails 36 are respectively connected with a first gun rack 1 and a second gun rack 2. The reciprocating driving component is a trolley 33 arranged at the bottom end part of the upright post 14.

The outer tube 10 is arranged on both sides of the gun rod, and the outer tube 10 can also be processed inside the gun rod. When the outer through pipe 10 is thick, welding flux is fed into the outer through pipe 10, and then submerged arc narrow-gap vertical welding can be carried out; the welding agent box 38 is arranged above the top beam 11, the welding agent box 38 is a long-strip box body with a wide top and a narrow bottom, submerged arc welding agent is filled in the box body, and a long-strip bottom plate 48 with a wide top and a narrow bottom is detachably arranged at the bottom of the box body and can be drawn out from two ends of the box body.

Preferably, the tracking assembly 5 of the device is a Y-direction adjusting device, which includes an extension spring 21 and two fixed wall-adhering wheels 5.5 located on the first gun rod 3, which are arranged between the first beam 6 and the guide rail 36 on the same side thereof, a compression spring 20 arranged between the second beam 7 and the guide rail 36 on the same side thereof, and two fixed wall-adhering wheels 5.5 located on the second gun rod 4.

Example 5

Referring to fig. 21, a novel narrow gap vertical welding device is arranged between a first weldment 100 and a second weldment 200, and comprises a stand column assembly, a gun rack assembly, a twin-wire welding gun, a reciprocating drive assembly and a tracking assembly 5. The tracking member 5 has the same structure as in embodiment 1.

In the embodiment of the present invention, the column assembly includes a column 14 disposed outside the weldment, and two sliding sleeves 15 are sleeved on the column 14 and are provided with a Z-direction driving device 49. The gun rack assembly comprises a first cross beam 6, a second cross beam 7, a first gun rack 1 and a second gun rack 2 which are respectively arranged on the first cross beam 6 and the second cross beam 7, the first cross beam 6 and the second cross beam 7 respectively penetrate through the two sliding sleeves 15, the end parts of the first cross beam 6 and the second cross beam 7 are in transmission connection with an X-direction driving device 50 and are used for driving the double-wire welding gun to move in the X direction, and the X-direction driving device 50 specifically comprises a motor 16 and a lead screw 8.

This double-wire welding gun is including locating first barral of a gun 3 and second barral of a gun 4 on first barral of a gun 1 and the second barral of a gun 2 respectively, and a plurality of tracking assemblies 5 are installed to first barral of a gun 3 and the tip of second barral of a gun 4.

Bottom plate 48 has been placed to 100 and second weldments 200 below, end surface has laminated preceding baffle 24 and backplate 23 respectively around bottom plate 48, and preceding baffle 24 and backplate 23 adopt the preparation of flexible ceramic fiber board, all install on preceding baffle 24 and the backplate 23 with Z to the baffle axle 51 of drive arrangement 49 transmission connection, and preceding baffle 24 and backplate 23 are close to bottom plate 48 tip and have pasted tightly clamp plate 52, avoid the molten iron to ooze from preceding baffle 24 or backplate 23.

During welding, the whole device gradually moves upwards under the drive of the Z-direction driving device 49, the front baffle plate 24 and the rear baffle plate 23 are synchronously and gradually lifted with the driving device 49 under the drive of the baffle plate shaft 51, so that the front baffle plate 24 and the rear baffle plate 23 are always tightly attached to two end heads of the welding line 25, and the generated molten iron is prevented from flowing out.

The distance between the welding gun contact tip 41 and the surface of the welding seam 25 is marked as L1, the distance between the top end surface of the front baffle plate 24 or the rear baffle plate 23 and the surface of the welding seam 25 is marked as L2, and L1 is larger than L2, so that the welding wire 12 can reach the end of the welding seam 25 during welding.

The invention discloses a novel narrow-gap vertical welding device, wherein a groove of the novel narrow-gap vertical welding device is an I-shaped groove, and the angle of the groove is about 0-3 degrees, so that the welding wire filling amount of the narrow-gap vertical welding device is less than that of gas electric vertical welding, the welding period is shorter than that of gas electric vertical welding, the consumed welding wire is less than that of the gas electric vertical welding, and the narrow-gap vertical welding device and the gas electric vertical welding device generate less heat. More importantly, the molten pool of the narrow gap welding is a punctiform molten pool with the diameter of about 10 mm, the molten pool of the gas electric vertical welding is a long-strip molten pool, and the heat of the gas electric vertical welding is much larger than that of the narrow gap vertical welding, so that the overheating tendency of the narrow gap vertical welding device disclosed by the invention is much smaller than that of the gas electric vertical welding method. Further, the length of the weld bead welded by the narrow gap vertical welding apparatus is almost infinite, and therefore the thickness of the steel sheet to be welded is also almost infinite, and is thicker than the steel sheet which can be welded by electrogas welding. The narrow-gap vertical welding device provided by the invention can be lifted along with the lifting of the molten pool surface, and can weld a vertical welding seam with a long welding seam, so that the same welding machine can weld a horizontal welding seam and a vertical welding seam.

In order to prevent molten iron from overflowing during welding, the gas-electric vertical welding adopts a water-cooling copper block, and the requirement on the flatness of the contact surface of a welding piece and the water-cooling copper block is high. The flexible flat ceramic fiber rope is used as the baffle, the structure is simple, the requirement on the flatness of the contact surface of the butt welding piece and the flexible flat ceramic fiber rope is not high, the pressing plate 52 is used for abutting against the baffle, the flexible flat ceramic fiber rope can be prevented from blocking molten iron due to the soft texture of the flexible flat ceramic fiber rope, and the molten iron is guaranteed not to seep out any more.

In many technical improvement projects related to welding automation, a test piece is successfully welded, but the welding is not used when an actual welding piece is welded, and the basic reasons are that the test piece is small in size, the groove size is accurate, the welding piece is large in size, the groove size error is large, and the welding has the mismatching problem and the like. In addition, there are various seam tracking methods on the market, but because the seam of narrow gap welding is very narrow, many seam tracking devices are not available because the body axletree terminal is large. Particularly, for a laser tracking device as an example, because a groove is blanked by gas cutting, the surface of the groove is convex or concave, and the convex or concave surface can prevent laser from irradiating the edge of a welding seam, the tracking is inaccurate. This patent proposes with mechanical type welding seam tracking's such as fixed adherence wheel and flexible adherence wheel scheme, and is simple reliable, small, anti-electromagnetic interference does not receive the influence of the indent of bevel face or evagination moreover, makes the adherence wheel on the barral of a gun always paste weldment lateral wall roll operation, makes the welding wire always keep with the fixed distance of weldment lateral wall, realizes the tracking of welding wire to the welding seam lateral wall.

In the embodiment of the invention, the tracking mode comprises two modes of Y-direction tracking (swinging around an X axis) and Z-axis rotation, the swinging or rotating force can be from a spring, air pressure or hydraulic pressure on the sliding tracking block, or from the elastic force of a pressure spring or a torsion spring connected with the convex column 28 or the convex shaft sleeve 32, and the tracking assembly 5 only comprises fixed wall-attached nylon 5.5 without telescopic wall-attached nylon 5.2. The effort point of force can produce on the tracker, also can produce on second crossbeam and link to each other the mechanism, and the convenient engineer of above multiple measure chooses for use in a flexible way according to the concrete structure of weldment, guarantees the good fusion of lateral wall.

The invention carries out narrow gap welding according to a mechanical system of electroslag welding or electrogas welding, redesigns the mechanical system of electroslag welding or electrogas welding and a welding gun according to the characteristics of narrow gap welding, changes the narrow gap from only flat welding into flat welding or vertical welding, retains the advantage of high welding efficiency of electroslag welding or electrogas welding, and thoroughly solves the problems that the welding heat of electroslag welding or electrogas welding is large, crystal grains are easy to grow, the toughness of a welding joint cannot reach the standard, and the welding joint cannot be applied to important structures.

The technical scope of the present invention is not limited to the above description, and those skilled in the art can make various changes and modifications to the above embodiments without departing from the technical spirit of the present invention, and such changes and modifications should fall within the protective scope of the present invention.

Claims

1. The utility model provides a novel narrow clearance vertical welding device sets up between first weldment and second weldment, a serial communication port, include:

a column assembly;

the gun rack assembly is arranged between the upright post assemblies and is movably connected with the upright post assemblies;

the double-wire welding gun is arranged on the gun rack assembly and is used for welding a welding piece;

the reciprocating driving assembly is arranged between the upright post assembly and the gun rack assembly and is used for driving the double-wire welding gun to reciprocate along the direction of a welding seam;

and the tracking assemblies are arranged on the double-wire welding gun and are used for tracking and adjusting the distance between the double-wire welding gun and the side wall of the weldment.

2. A novel narrow-gap vertical welding device according to claim 1, wherein the upright post assembly comprises two upright posts respectively positioned at the outer sides of two end parts of a welding part, and each upright post is sleeved with a sliding sleeve and is provided with a lifting mechanism;

the gun rack assembly comprises a first gun rack and a second gun rack which are symmetrically arranged between two stand columns, a first cross beam and a second cross beam which are respectively arranged on the first gun rack and the second gun rack, and a top beam which is positioned above the first cross beam and the second cross beam, wherein the first gun rack and the second gun rack respectively comprise a gun rack body and a gun rack shaft, the end part of the gun rack body is fixedly connected with one end of the gun rack shaft, the other end of the gun rack shaft is movably connected with a sliding sleeve on the same side of the gun rack shaft, the two end parts of the top beam are movably connected with the sliding sleeve on the same side of the top beam, and a plurality of outer through pipes are arranged on the top beam and the gun rack body in a penetrating way;

the reciprocating driving assembly comprises two motors which are respectively arranged on two sliding sleeves, wherein one output end of each motor is connected with the first cross beam through a lead screw, and the other output end of each motor is connected with the second cross beam through a lead screw.

3. The novel narrow-gap vertical welding device according to claim 1, wherein the upright post assembly comprises two upright posts which are respectively positioned at the outer sides of two end parts of a welding piece, and each upright post is sleeved with a sliding sleeve and is provided with a lifting mechanism;

the gun rack assembly comprises a first gun rack and a second gun rack which are symmetrically arranged between two upright posts, a first cross beam and a second cross beam which are respectively arranged on the first gun rack and the second gun rack, and a top beam which penetrates through the first cross beam and the second cross beam, wherein two end parts of the top beam are movably connected with the same-side sliding sleeves;

the reciprocating driving assembly comprises a screw rod, a motor and nut seats, the bottom end parts of the nut seats are fixedly connected with a first cross beam and a second cross beam respectively and are provided with the screw rod in a penetrating mode, the two end parts of the screw rod are movably connected with the sliding sleeves on the same side of the screw rod respectively, the motor is fixedly arranged on the sliding sleeves, the output ends of the motor are in transmission connection with the screw rod, and a plurality of outer through pipes are arranged on the top beam and the gun frame body in a penetrating mode.

4. The novel narrow gap vertical welding device of claim 3, further comprising a Z-direction rotation adjusting device, wherein the Z-direction rotation adjusting device comprises two protruding shaft sleeves respectively fixed on the upper ends of the first gun rack and the second gun rack, a protruding shaft is fixed on each protruding shaft sleeve, the top ends of the two protruding shafts are respectively connected with the first cross beam and the second cross beam, a fixing rod is arranged at the bottom end of each of the first cross beam and the second cross beam, and a torsion spring is arranged between each fixing rod and the protruding shaft.

5. The novel narrow-gap vertical welding device according to claim 1, wherein the upright post assembly comprises two upright posts which are respectively positioned at the outer sides of two end parts of a welding piece, and each upright post is sleeved with a sliding sleeve and is provided with a lifting mechanism;

the gun rack assembly comprises a first gun rack and a second gun rack which are symmetrically arranged between two upright posts, the side parts of the first gun rack and the second gun rack are fixedly connected with a top beam, the end part of the top beam is fixedly connected with a guide rail, two sliding sleeves are respectively and movably connected with a first cross beam and a second cross beam, the end parts of the first cross beam and the second cross beam are respectively and fixedly connected with a connecting rod, the side part of the connecting rod is fixedly connected with a sliding block, the sliding block can slide on the guide rail, and a plurality of outer through pipes are arranged on the gun rack body in a penetrating manner;

the reciprocating driving component is a trolley arranged at the bottom end part of the upright post.

6. The narrow gap vertical welding device of claim 5, further comprising a Y-direction adjusting device, wherein the Y-direction adjusting device comprises a Y-direction backward mechanism, a position sensor and a position reference sheet, the Y-direction backward mechanism is arranged between the connecting rod and the guide rail and electrically connected with the position sensor, and the position sensor is arranged on the connecting rod and matched with the position reference sheet arranged on the guide rail.

7. A novel narrow gap vertical welding device according to claim 5, characterized by further comprising a Y-direction adjusting device, wherein the Y-direction adjusting device comprises an extension spring arranged between the first cross beam and the guide rail on the same side of the first cross beam, and a compression spring arranged between the second cross beam and the guide rail on the same side of the second cross beam.

8. The novel narrow-gap vertical welding device according to claim 1, wherein the upright post assembly comprises an upright post arranged on the outer side of a weldment, a sliding sleeve is sleeved on the upright post, and a lifting mechanism is installed on the sliding sleeve;

the gun rack assembly comprises a top beam connected with a lifting mechanism, and a first cross beam and a second cross beam which are connected to the top beam in a sliding manner, wherein the end parts of the first cross beam and the second cross beam are both connected with connecting rods, the side part of each connecting rod is provided with a slide block, each slide block is connected with a guide rail in a matching manner, and the end parts of the two guide rails are respectively connected with a first gun rack and a second gun rack;

9. The narrow-gap vertical welding device according to claim 1, wherein the tracking assembly comprises a tracking block, a fixed wall-adhering wheel and a telescopic wall-adhering wheel which are arranged inside the tracking block, the fixed wall-adhering wheel is abutted against the side surface of the first weldment, the telescopic wall-adhering wheel comprises an elastic part and a wall-adhering wheel body which are arranged inside the tracking block, and the elastic part is elastically connected with the wall-adhering wheel body so that the wall-adhering wheel body is abutted against the side surface of the second weldment.

10. The novel narrow-gap vertical welding device according to claim 9, wherein the elastic member is a compression spring assembly, a torsion spring assembly or an oil cylinder assembly;

when the welding device is a pressure spring assembly, the pressure spring assembly comprises a stretching rod sleeve and a stretching rod which are arranged in the tracking block, one end of the stretching rod is inserted into the stretching rod sleeve, a pressure spring is pressed between the stretching rod sleeve and the stretching rod, and the other end of the stretching rod is connected with an adherence wheel body which is abutted against the side face of the second welding part;

when the wall-attached wheel is a torsion spring component, the torsion spring component comprises a rod-extending sleeve and a rod, the rod-extending sleeve and the rod are arranged in the tracking block, one end of the rod is inserted into the rod-extending sleeve and is connected with the rod-extending sleeve in a sliding manner, the other end of the rod is connected with a wall-attached wheel body which is abutted against the side face of the second weldment, and a torsion spring is connected between the wall-attached wheel body and a shaft for fixing the wall-attached wheel;

when being the oil cylinder subassembly, the oil cylinder subassembly is including locating inside high-pressure cylinder and the piston of tracking block, piston one end links to each other with the adherence wheel body, and the other end stretches into in the high-pressure cylinder, the high-pressure cylinder is connected with high-pressure oil pipe.