Automatic welding device convenient to adjust

Abstract

The invention relates to the field of part machining machinery production, in particular to a convenient-to-adjust automatic welding device which comprises a welding table, a mounting seat is arranged on one side of the welding table, and a pair of limiting frames is arranged on the portion, located at the top of the mounting seat, of the welding table. A telescopic clamp can be arranged around a cylindrical plate arranged on the outer side of the circle center column in a sleeving mode, the cylindrical plate can be clamped through the rollers on the first limiting seats located at the left end and the right end, the two ends of the cylindrical plate can be automatically attached, the second limiting seat at the top can support the cylindrical plate, and the cylindrical plate can be clamped through the rollers on the first limiting seats at the left end and the right end. The two ends of the cylindrical metal plate are tightly attached, so that the problem that the widths of welding seams are inconsistent due to deviation of the attaching precision of the two ends is solved, meanwhile, an operator can align the gaps of the cylindrical metal plate along a welding machine, and accurate positioning of the cylindrical metal plate is further achieved.

Description

Technical Field

[0001] The invention relates to the field of parts processing machinery production, in particular to an automatic welding device which is easy to adjust. Background Art

[0002] In some specially designed catalytic combustion chambers, a tubular structure is used as the shell. The main structure of the combustion chamber shell is usually composed of multiple sheet metal parts. The sheet metal connecting the air inlet or outlet of the combustion chamber needs to be welded to the sheet metal parts of the main structure. The air inlet or outlet is a cylindrical structure, which is pressed into a cylindrical shape by a rolling machine from a flat sheet metal, and then welded and connected at both ends by a welding device. This can ensure the sealing between the cylindrical air inlet or outlet and the main structure sheet metal parts to prevent gas leakage at the connection.

[0003] Although the cylindrical sheet metal is roughly formed after rolling, there may be certain deviations in dimensional accuracy. As a result, in traditional welding, the fitting accuracy of the two ends of the cylindrical sheet metal is different, resulting in inconsistent weld width or loose butt joints. Secondly, during welding, the positioning fixture is not accurate enough, which may cause the welding gap in some parts of the cylindrical sheet metal to be too large or too small. A gap that is too large may result in defects such as incomplete welding or slag inclusion in the weld, while a gap that is too small may cause welding stress concentration, thereby reducing the welding effect.

[0004] Therefore, it is necessary to propose an automatic welding device that is easy to adjust to solve the above technical problems. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides an automatic welding device that is easy to adjust, which solves the technical problems of insufficient fitting accuracy and loose fitting at both ends of cylindrical sheet metal, affecting the welding quality, and insufficient positioning fixture accuracy during welding, resulting in excessive or small welding gaps in certain parts of the cylindrical sheet metal.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: The technical solution adopted by the present invention to solve the technical problem is: an automatic welding device that is easy to adjust, including a welding table, a mounting seat is arranged on one side of the welding table, a pair of limit frames are arranged on the top of the mounting seat on the welding table, a welding machine that moves forward and backward is arranged on the welding table, a center column for sleeved cylindrical sheet metal is arranged in the middle of the mounting seat, a telescopic extrusion seat that can move up and down is arranged on the center column, a first limit seat for limiting the left and right ends of the cylindrical sheet metal is arranged on the mounting seat, and a second limit seat for limiting the lower part of the cylinder is arranged on the mounting seat, and the first limit seat and the second limit seat are at least one; A precise positioning assembly, which is arranged on the mounting seat and is used to drive the first limit seat and the second limit seat to move along the center direction of the center column and clamp the outer periphery of the cylindrical sheet metal; The gap adjustment component is arranged on the telescopic extrusion seat and is used for adjusting the gap size between the two ends of the cylindrical sheet metal.

[0007] Preferably, the precise positioning assembly comprises: a fixing seat, which is mounted at the front end of the mounting seat and has a long structure; There are at least two spring rods, which are slidably connected to the front end of the fixing seat; A push plate, which is mounted on the front ends of the two spring rods; A movable seat, which is installed at the rear ends of the two spring rods and is slidably connected in the inner cavity of the fixed seat, the movable seat is a concave structure, and a plurality of oblique grooves are opened at the left and right ends of the movable seat along the front-back direction; A lifting seat, which is connected to the inner side of the fixed seat through a slide rail and is located inside the movable seat. A positioning seat is installed at the bottom of the lifting seat and extends into the inner side of the lowest end of the inclined groove for sliding connection. The lower part of the second limit seat is fixedly connected to the top of the lifting seat. A rotating rod, which is rotatably connected in a fixed seat; There is at least one first gear, and each of them is installed on the side of the rotating rod corresponding to the second limit seat, and the second limit seat is close to the inner side of one end of the rotating rod and is installed with gear teeth meshing with the first gear; There is at least one second gear, each of which is mounted on the outside of the rotating rod and is located between the spaced first gears; Rack plates, which are at least two groups, and one group is at least one, and one end of the opposite sides of the two groups of rack plates are extended into the interior of the fixed seat for sliding connection, and the two groups of rack plates are symmetrically arranged, and the two groups of rack plates are meshed with the second gear; An L-shaped slider, at least one of which, the vertical end of which is connected to the top of the fixed seat by means of a slide rail, the horizontal end of which is fixedly connected to an end of the rack plate away from the fixed seat, and the bottom of the first limit seat is fixedly connected to the vertical end of the L-shaped slider.

[0008] Preferably, rollers are installed on one end of the two first limit seats and the second limit seats close to the center column, and the rollers on the two first limit seats and the second limit seats are both arranged on the outer circular track of the center column.

[0009] Preferably, the telescopic extrusion seat is arranged in the middle position between the lower parts of a pair of the limiting frames, and a laser lamp is arranged in the middle of the telescopic extrusion seat, and the laser lamp and the welding machine are always on the axis of the fixed seat.

[0010] Preferably, a fixing rod is rotatably connected to the top between the first limit seats, a side roller is installed in the middle of the fixing rod, and the side rollers are on the same circular track of the first limit seat and the second limit seat, one end of the fixing rod rotates through the first limit seat at the front end and is installed with a rotating plate, and a compression spring is rotatably connected to the horizontal end of the L-shaped slider, and the other end of the compression spring is fixedly connected to one end of the rotating plate.

[0011] Preferably, two side wall extrusion seats are installed between the two groups of first limiting seats located at the front end, and the side wall extrusion seats of each group are arranged along a ring shape.

[0012] Preferably, a limiting seat is installed on one side of the first limiting seat located at the front end, a limiting rod is installed in the middle of the rotating plate, and the limiting rod can slide within the limiting seat.

[0013] Preferably, the gap adjustment component comprises: A worm screw, which is rotatably connected to the interior of the telescopic extrusion seat; A torsion cap is fixedly mounted on one end of the worm, and one end of the worm extends out of the front end of the telescopic extrusion seat; A worm gear rotatably connected to the inner cavity of the telescopic extrusion seat; A first bevel gear, which is mounted on the left side of the worm gear; A second bevel gear is rotatably connected to the inner cavity of the telescopic extrusion seat and meshes with the upper portion of the first bevel gear; The plug plate is located in the middle of the telescopic extrusion seat, and a slot for rotating the plug plate is opened on the top of the telescopic extrusion seat. The bottom of the plug plate is fixedly connected to the top of the second bevel gear through a rotating rod. The laser lamp is installed in the middle of the plug plate. The top of the plug plate is pointed, and the cross section of the plug plate is arranged in a plate shape.

[0014] Preferably, a dial is installed on the side of the twisting cap facing away from the telescopic extrusion seat, and a scale needle is installed on the side of the top of the telescopic extrusion seat corresponding to the dial.

[0015] Beneficial effects: (1) The present invention can set retractable clamps around the cylindrical plate member sleeved on the outside of the central column through the precise positioning component. The rollers on the first limit seats at the left and right ends can clamp the cylindrical plate member so that the two ends of the cylindrical sheet metal can automatically fit together. The second limit seat on the top can support it to ensure that the two ends of the cylindrical sheet metal fit tightly, thereby avoiding the problem of inconsistent weld width due to deviation in the fitting accuracy of the two ends. At the same time, the operator can align the gap of the cylindrical sheet metal along the welding machine to further achieve precise positioning of the cylindrical sheet metal.

[0016] (2) The gap adjustment assembly of the present invention can change the gap size between the two ends of the cylindrical sheet metal by rotating the insert plate to different angles through a transmission mechanism such as a worm, a worm wheel, and a bevel gear. This enables the operator to adjust the gap size between the two ends of the cylindrical sheet metal very accurately according to actual needs, thereby improving the accuracy and quality of welding. The setting of the dial and the scale needle provides an accurate reference for adjusting the gap size. The operator can make more accurate adjustments based on the indication of the scale, avoiding the errors that may be caused by adjusting based on feeling alone, thereby greatly improving the accuracy of the gap adjustment.

[0017] (3) The present invention arranges the side rollers on the same circular track where the first limit seat and the second limit seat are located, which can provide additional support and positioning on the side of the cylindrical sheet metal. The arrangement of the side rollers increases the contact points and support force on the side of the cylindrical sheet metal, and works together with the first limit seat and the second limit seat to further improve the positioning stability of the cylindrical sheet metal, and at the same time can promote the fit between the two ends of the cylindrical sheet metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention from another angle; Figure 3 It is a schematic diagram of a central column of the present invention; Figure 4 It is a schematic diagram of the precise positioning component of the present invention; Figure 5 It is an exploded view of the precise positioning component of the present invention; Figure 6 for Figure 3 A partial enlarged view of middle A; Figure 7 It is a schematic diagram of the fixing rod and the side roller of the present invention; Figure 8 It is a schematic diagram of the gap adjustment component of the present invention.

[0020] Numbers in the figure: 1. Welding table; 10. Mounting seat; 11. Limiting frame; 12. Welding machine; 13. Center column; 14. Telescopic extrusion seat; 15. First limiting seat; 16. Second limiting seat; Precision positioning assembly; 21, fixed seat; 22, spring rod; 23, push plate; 24, moving seat; 25, inclined groove; 26, lifting seat; 261, positioning seat; 27, rotating rod; 28, first gear; 29, second gear; 291, rack plate; 292, L-shaped slider; 293, roller; 294, laser light; 211, fixed rod; 212, side roller; 213, rotating plate; 214, compression spring; 215, limit seat; 221, side wall extrusion seat; gap adjustment assembly; 31, worm; 32, torsion cap; 321, dial; 322, scale needle; 33, worm wheel; 34, first bevel gear; 35, second bevel gear; 36, plug plate. DETAILED DESCRIPTION In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0021] like Figure 1-Figure 5As shown, an automatic welding device that is easy to adjust includes a welding table 1, a mounting seat 10 is arranged on one side of the welding table 1, a pair of limit frames 11 are arranged on the top of the mounting seat 10 on the welding table 1, a welding machine 12 that moves forward and backward is arranged on the welding table 1, and a telescopic machine for moving the welding machine 12 up and down is installed on the welding table 1, so that after the cylindrical sheet metal is fixed, the welding machine 12 is driven to move on the cylindrical sheet metal through the telescopic function for welding, a central column 13 for sleeved cylindrical sheet metal is arranged in the middle of the mounting seat 10, a telescopic extrusion seat 14 that can move up and down is arranged on the central column 13, and a telescopic rod for driving the telescopic extrusion seat 14 to move upward is installed inside the central column 13, so that it is convenient to move the telescopic extrusion seat 14 upward through the telescopic extrusion seat 1 4 is used to extrude the cylindrical sheet metal, and the mounting seat 10 is provided with a first limit seat 15 for limiting the left and right ends of the cylindrical sheet metal, and the mounting seat 10 is provided with a second limit seat 16 for limiting the lower part of the cylinder. The first limit seat 15 and the second limit seat 16 are at least one, and the precise positioning component 2 is arranged on the mounting seat 10, and is used to drive the first limit seat 15 and the second limit seat 16 to move along the center direction of the center column 13, and clamp the outer periphery of the cylindrical sheet metal. The precise positioning component 2 includes a fixed seat 21, which is installed at the front end of the mounting seat 10 and has a long structure. There are at least two spring rods 22, which are slidably connected to the front end of the fixed seat 21, and the push plate 23 is installed at the front ends of the two spring rods 22. The moving seat 24 is installed at the rear ends of the two spring rods 22 and is slidably connected in the inner cavity of the fixed seat 21. The movable seat 24 is a concave structure. A plurality of inclined grooves 25 are provided at the left and right ends of the movable seat 24 along the front-back direction. The lifting seat 26 is connected to the inner side of the fixed seat 21 through a slide rail and is located inside the movable seat 24. A positioning seat 261 extending into the inner side of the lowest end of the inclined groove 25 and slidably connected is installed at the bottom of the lifting seat 26. The bottom of the second limit seat 16 is fixedly connected to the top of the lifting seat 26. The rotating rod 27 is rotatably connected in the fixed seat 21. There is at least one first gear 28, and they are all installed on the side of the rotating rod 27 corresponding to the second limit seat 16. The inner side of one end of the second limit seat 16 close to the rotating rod 27 is installed with a first gear 2 8 meshing gear teeth, there is at least one second gear 29, the second gear 29 is installed on the outside of the rotating rod 27 and is located between the spaced first gears 28, there are at least two groups of rack plates 291, and one group is at least one, one end of the opposite side of the two groups of rack plates 291 extends into the interior of the fixed seat 21 for sliding connection, and the two groups of rack plates 291 are symmetrically arranged, and the two groups of rack plates 291 are meshed with the second gear 29, there is at least one L-shaped slider 292, the vertical end of the L-shaped slider 292 is connected to the top of the fixed seat 21 by means of a slide rail, the horizontal end of the L-shaped slider 292 is fixedly connected to the end of the rack plate 291 away from the fixed seat 21, and the bottom of the first limit seat 15 is fixedly connected to the vertical end of the L-shaped slider 292.

[0022] It should be noted that when the cylindrical sheet metal needs to be welded, it is first sleeved on the central column 13 in the middle of the mounting seat 10. At this time, the push plate 23 is driven to squeeze the spring rod 22. After the spring rod 22 is subjected to force, it drives the movable seat 24 to slide backward inside the fixed seat 21. As the movable seat 24 moves, the positioning seat 261 moves in a directional manner along the inclined groove 25. This process prompts the lifting seat 26 to move upward, and then the first limit seat 15 also moves upward. While the first limit seat 15 moves upward, the gear teeth on the inner side of one end of the rotating rod 27 close to the rotating rod 27 drive the first gear 28 and the rotating rod 27 to rotate synchronously. The rotation of the rotating rod 27 then drives the second gear 29 installed thereon to move accordingly. The movement of the second gear 29 causes the two sets of rack plates 291 meshing therewith to move relative to each other along the inside of the fixed seat 21. The relative movement of the two sets of rack plates 291 drives the two L The shaped slider approaches along the inside of the central column 13, thereby prompting the two first limiting seats 15 and the second limiting seats 16 to limit along the outside of the cylindrical sheet metal, wherein the two first limiting seats 15 are used to clamp the left and right ends of the cylindrical sheet metal, so that the two ends of the cylindrical sheet metal can be automatically attached, and the second limiting seat 16 on the top can support it; When the two ends of the cylindrical sheet metal are fitted together, the telescopic rod inside the central column 13 drives the telescopic extrusion seat 14 to be squeezed between the limit frames 11 along the two ends of the cylindrical sheet metal, further ensuring that the position of the cylindrical sheet metal is fixed. Finally, the welding machine 12 that can move forward and backward on the welding table 1 and the telescopic machine installed on the welding table 1 for the welding machine 12 to move up and down make the welding machine 12 weld at the gap of the cylindrical sheet metal between the limit frames 11; The device realizes automatic clamping and limiting of the cylindrical sheet metal through the precise positioning component 2. The first limiting seat 15 and the second limiting seat 16 can accurately limit along the outer side of the cylindrical sheet metal to ensure that the two ends of the cylindrical sheet metal fit tightly, thereby avoiding the problem of inconsistent weld width caused by deviation in the fitting accuracy of the two ends.

[0023] like Figure 3 and Figure 5 As shown, rollers 293 are installed on one end of the two first limit seats 15 and the second limit seats 16 close to the center column 13 , and the rollers 293 on the two first limit seats 15 and the second limit seats 16 are both arranged on the outer circular track of the center column 13 .

[0024] It should be noted that when the cylindrical sheet metal is sleeved on the central column 13, the cylindrical sheet metal is clamped by the precise positioning component 2. During this process, the rollers 293 of the first limit seat 15 and the second limit seat 16 close to one end of the central column 13 roll on the outer circular track of the central column 13, making it convenient for the operator to align the gap of the cylindrical sheet metal along the welding machine 12 later, thereby further realizing the precise positioning of the cylindrical sheet metal.

[0025] like Figure 3 and Figure 6 As shown, the telescopic extrusion seat 14 is arranged in the middle position between the lower parts of a pair of limiting frames 11 , and a laser lamp 294 is arranged in the middle of the telescopic extrusion seat 14 . The laser lamp 294 and the welding machine 12 are always on the axis of the fixed seat 21 .

[0026] It should be noted that, when the cylindrical sheet metal is sleeved on the center column 13 and positioned by the first limit seat 15 and the second limit seat 16 of the precise positioning assembly 2, the telescopic rod inside the center column 13 drives the telescopic extrusion seat 14 to move upward. The telescopic extrusion seat 14 is arranged in the middle position between the lower part of a pair of limit frames 11. In this process, the laser lamp 294 in the middle of the telescopic extrusion seat 14 is turned on. Since the laser lamp 294 and the welding machine 12 are always on the axis of the fixed seat 21, the laser beam emitted by the laser lamp 294 can be used as a reference line to indicate the position and direction of welding. When the telescopic extrusion seat 14 squeezes the two ends of the cylindrical sheet metal between the limit frames 11, the welding machine 12 can accurately perform welding operations at the gap of the cylindrical sheet metal according to the instructions of the laser lamp 294, so that the welding machine 12 can more accurately perform welding at the gap of the cylindrical sheet metal. This greatly improves the welding accuracy and reduces the weld quality problems caused by inaccurate welding position.

[0027] like Figure 3 and Figure 7 As shown, a fixed rod 211 is rotatably connected to the top between the first limit seats 15, a side roller 212 is installed in the middle of the fixed rod 211, and the side roller 212 is on the same circular track of the first limit seat 15 and the second limit seat 16. One end of the fixed rod 211 rotates through the first limit seat 15 at the front end and is installed with a rotating plate 213. A compression spring 214 is rotatably connected to the horizontal end of the L-shaped slider 292, and the other end of the compression spring 214 is fixedly connected to one end of the rotating plate 213.

[0028] It should be noted that when the first limit seat 15 and the second limit seat 16 clamp and position the cylindrical sheet metal under the action of the precise positioning component 2, as the L-shaped slider moves, the compression spring 214 connected thereto also undergoes corresponding deformation. Since the other end of the compression spring 214 is fixedly connected to the rotating plate 213, and the rotating plate 213 is connected to the fixed rod 211, under the action of the compression spring 214, the fixed rod 211 rotates, and the side roller 212 installed in the middle of the fixed rod 211 also rotates and contacts the side of the cylindrical sheet metal. Since the side roller 212 is on the same circular track as the first limit seat 15 and the second limit seat 16, it can provide additional support and positioning on the side of the cylindrical sheet metal. The setting of the side roller 212 increases the contact point and supporting force on the side of the cylindrical sheet metal, and works together with the first limit seat 15 and the second limit seat 16 to further improve the positioning stability of the cylindrical sheet metal, and at the same time can promote the fit between the two ends of the cylindrical sheet metal.

[0029] like Figure 3 and Figure 7 As shown, a limiting seat 215 is installed on one side of the first limiting seat 15 located at the front end, a limiting rod is installed in the middle of the rotating plate 213, and the limiting rod can slide within the limiting seat 215.

[0030] It should be noted that the cooperation between the limit rod and the limit seat 215 can accurately control the movement range of the turn plate 213, thereby ensuring that the side roller 212 always provides support force within a force range, preventing the side roller 212 from applying excessive pressure on the cylindrical sheet metal or deviating from the correct position, and ensuring the stability of the cylindrical sheet metal during welding.

[0031] like Figure 3 and Figure 7 As shown, two side wall extrusion seats 221 are installed between the two groups of first limit seats 15 at the front end, among which the upper side wall extrusion seat 221 is fixedly connected to the first limit seat 15 through a support plate, and each group of side wall extrusion seats 221 is arranged along a ring shape.

[0032] When the cylindrical sheet metal is sleeved on the center column 13 and initially positioned by the precise positioning assembly 2, the side wall extrusion seat 221 installed between the two groups of first limit seats 15 also approaches the side wall of the cylindrical sheet metal. Since each group of side wall extrusion seats 221 is arranged along a ring shape, they can extrude and limit the side wall of the cylindrical sheet metal from different angles. Together with the first limit seat 15 and the second limit seat 16, the positioning stability of the cylindrical sheet metal is greatly enhanced.

[0033] like Figure 6 and Figure 8As shown, the gap adjustment component 3 is arranged on the telescopic extrusion seat 14, and is used to adjust the spacing size between the two ends of the cylindrical sheet metal. The gap adjustment component 3 includes a worm 31 rotatably connected to the inside of the telescopic extrusion seat 14, a torsion cap 32 is fixedly installed at one end of the worm 31, and one end of the worm 31 extends out of the front end of the telescopic extrusion seat 14, a worm wheel 33 is rotatably connected to the inner cavity of the telescopic extrusion seat 14, a first bevel gear 34 is installed on the left side of the worm wheel 33, and a second bevel gear 35 is rotatably connected to the inner cavity of the telescopic extrusion seat 14 and is connected to the first bevel gear The top of the plug plate 36 is meshed with each other, the plug plate 36 is located in the middle of the telescopic extrusion seat 14, and the top of the telescopic extrusion seat 14 is provided with a slot for the plug plate 36 to rotate, the bottom of the plug plate 36 is fixedly connected to the top of the second bevel gear 35 through a rotating rod, and the laser lamp 294 is installed in the middle of the plug plate 36. Since the laser lamp 294 is located in the middle of the plug plate 36, the position of the laser lamp 294 is not changed while the plug plate 36 rotates, so as to prevent the position of the laser lamp 294 from being changed. The top of the plug plate 36 is pointed, and the cross section of the plug plate 36 is arranged in a plate shape.

[0034] It should be noted that when it is necessary to adjust the gap size between the two ends of the cylindrical sheet metal, the operator turns the torsion cap 32 to drive the worm 31 to rotate. The rotation of the worm 31 drives the worm wheel 33 meshing therewith to rotate. When the worm wheel 33 rotates, it drives the first bevel gear 34 installed on its left side to rotate. The first bevel gear 34 meshes with the second bevel gear 35, thereby rotating the second bevel gear 35. The rotation of the second bevel gear 35 drives the plug plate 36 to rotate in the middle of the telescopic extrusion seat 14. Since a slot for the rotation of the plug plate 36 is provided at the top of the telescopic extrusion seat 14, the position of the plug plate 36 can be adjusted within a certain range. The top of the plug plate 36 is pointed and the cross section is plate-shaped. When the plug plate 36 rotates, it can be inserted between the two ends of the cylindrical sheet metal. The gap size between the two ends of the cylindrical sheet metal can be changed by adjusting the plug plate 36 to rotate to different angles.

[0035] It is worth noting that the transmission of the worm 31 and the worm wheel 33 is self-locking. Once the gap size is adjusted, the position of the insert plate 36 can remain stable and will not change due to external force or vibration. This ensures that during the welding process, the gap size between the two ends of the cylindrical sheet metal remains consistent, thereby improving the stability and reliability of the welding.

[0036] like Figure 6 As shown, a dial 321 is installed on the side of the twisting cap 32 facing away from the telescopic extrusion seat 14 , and a scale needle 322 is installed on the top of the telescopic extrusion seat 14 corresponding to the side of the dial 321 .

[0037] It should be noted that by observing the indicated position of the scale needle 322 on the scale plate 321, the moving distance of the insert plate 36 can be intuitively determined, thereby accurately judging the adjustment of the gap size between the two ends of the cylindrical sheet metal.

[0038] Working principle: This is an automatic welding device that is easy to adjust. When in use, when a cylindrical sheet metal needs to be welded, it is sleeved on the central column 13 in the middle of the mounting seat 10, and the push plate 23 is driven to squeeze the spring rod 22. The spring rod 22 drives the moving seat 24 to slide backward inside the fixed seat 21. The movement of the moving seat 24 causes the positioning seat 261 to move directionally along the inclined groove 25, prompting the lifting seat 26 to move upward, thereby driving the first limit seat 15 to move upward, and the inner gear teeth of the first limit seat 15 drive the first gear 28 and the rotating rod 27 to rotate, so that the second gear 29 moves accordingly, thereby driving the two sets of rack plates 291 to move relative to each other, and the rack plate 291 drives L The shaped slider moves, so that the two first limiting seats 15 and the second limiting seats 16 are limited along the outer side of the cylindrical sheet metal, wherein the two first limiting seats 15 clamp the left and right ends of the cylindrical sheet metal, and the second limiting seat 16 on the top plays a supporting role. The rollers 293 of the first limiting seats 15 and the second limiting seats 16 close to one end of the central column 13 roll on the outer circular track of the central column 13, which is convenient for the operator to align the gap of the cylindrical sheet metal along the welding machine 12 to achieve precise positioning. The compression spring 214 drives the fixed rod 211 to rotate, so that the side roller 212 in the middle of the fixed rod 211 contacts the side of the cylindrical sheet metal, providing additional support and positioning for the cylindrical sheet metal on the same circular track, enhancing the positioning stability, and at the same time promoting a higher degree of fit between the two ends of the cylindrical sheet metal; The gap size between the two ends of the cylindrical sheet metal is adjusted by adjusting the gap component 3. The operator rotates the torsion cap 32 to drive the worm 31 to rotate, drive the worm wheel 33 to rotate, and then drive the first bevel gear 34 to rotate. The first bevel gear 34 meshes with the second bevel gear 35 to rotate the second bevel gear 35, thereby driving the plug plate 36 to move in the middle of the telescopic extrusion seat 14. The top of the plug plate 36 is pointed and the cross section is plate-shaped. It can be inserted between the two ends of the cylindrical sheet metal to adjust the gap. The dial 321 on the torsion cap 32 and the scale needle 322 on the top of the telescopic extrusion seat 14 cooperate to provide an accurate reference for the gap size adjustment. The operator can accurately adjust the gap according to the scale indication to improve the gap adjustment accuracy; The telescopic rod inside the central column 13 drives the telescopic extrusion seat 14 to move upward, squeezing the two ends of the cylindrical sheet metal between the limit frames 11, and the laser lamp 294 in the middle of the telescopic extrusion seat 14 is turned on. Since the laser lamp 294 and the welding machine 12 are always on the axis of the fixed seat 21, the laser beam emitted by the laser lamp 294 is used as a reference line to indicate the position and direction of welding.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic welding device that is easy to adjust, comprising a welding table (1), characterized in that; A mounting seat (10) is provided on one side of the welding platform (1), a pair of limit frames (11) are provided on the welding platform (1) at the top of the mounting seat (10), a welding machine (12) that moves forward and backward is provided on the welding platform (1), a center column (13) for sleeve-mounting a cylindrical sheet metal is provided in the middle of the mounting seat (10), a telescopic extrusion seat (14) that can move up and down is provided on the center column (13), a first limit seat (15) for limiting the left and right ends of the cylindrical sheet metal is provided on the mounting seat (10), and a second limit seat (16) for limiting the lower part of the cylindrical sheet metal is provided on the mounting seat (10), and the first limit seat (15) and the second limit seat (16) are at least one; A precise positioning assembly (2), which is arranged on the mounting seat (10) and is used to drive the first limit seat (15) and the second limit seat (16) to move along the center direction of the center column (13) and clamp the outer periphery of the cylindrical sheet metal; The gap adjustment component (3) is arranged on the telescopic extrusion seat (14) and is used to adjust the spacing between the two ends of the cylindrical sheet metal.

2. An automatic welding device that is easy to adjust according to claim 1, characterized in that; The precise positioning component (2) comprises: A fixing seat (21) is mounted on the front end of the mounting seat (10) and has an elongated structure; There are at least two spring rods (22) which are slidably connected to the front end of the fixing seat (21); A push plate (23) mounted on the front ends of the two spring rods (22); A movable seat (24) is mounted at the rear ends of the two spring rods (22) and is slidably connected to the inner cavity of the fixed seat (21); the movable seat (24) is a concave structure, and a plurality of inclined grooves (25) are formed at the left and right ends of the movable seat (24) along the front-back direction; A lifting seat (26) is connected to the inner side of the fixed seat (21) through a slide rail and is located inside the movable seat (24). A positioning seat (261) is installed at the bottom of the lifting seat (26) and extends into the inner side of the lowest end of the inclined groove (25) for sliding connection. The lower side of the second limiting seat (16) is fixedly connected to the top of the lifting seat (26); A rotating rod (27) rotatably connected to the fixed seat (21); At least one first gear (28) is mounted on a side of the rotating rod (27) corresponding to the second limiting seat (16); the second limiting seat (16) is located on the inner side of one end of the rotating rod (27) and is provided with gear teeth meshing with the first gear (28); At least one second gear (29), each of which is mounted on the outside of the rotating rod (27) and located between the spaced first gears (28); Rack plates (291), which are in at least two groups, with one group having at least one rack plate, and opposite ends of the two groups of rack plates (291) are both inserted into the interior of the fixed seat (21) for sliding connection, and the two groups of rack plates (291) are both symmetrically arranged, and the two groups of rack plates (291) are both meshed with the second gear (29); There is at least one L-shaped slider (292), wherein the vertical end of the L-shaped slider (292) is connected to the top of the fixed seat (21) by means of a slide rail, the horizontal end of the L-shaped slider (292) is fixedly connected to an end of the rack plate (291) away from the fixed seat (21), and the bottom of the first limit seat (15) is fixedly connected to the vertical end of the L-shaped slider (292).

3. An automatic welding device that is easy to adjust according to claim 2, characterized in that; A roller (293) is installed at one end of the two first limit seats (15) and the second limit seat (16) close to the center column (13), and the rollers (293) on the two first limit seats (15) and the second limit seat (16) are both arranged on the outer circular track of the center column (13).

4. The automatic welding device that is easy to adjust according to claim 1, characterized in that; The telescopic extrusion seat (14) is arranged at a middle position between the lower parts of a pair of the limiting frames (11), a laser lamp (294) is arranged in the middle of the telescopic extrusion seat (14), and the laser lamp (294) and the welding machine (12) are always on the axis of the fixed seat (21).

5. The automatic welding device that is easy to adjust according to claim 3, characterized in that; A fixing rod (211) is rotatably connected to the top between the first limiting seats (15), a side roller (212) is installed in the middle of the fixing rod (211), and the side roller (212) is located on the same circular track of the first limiting seat (15) and the second limiting seat (16), one end of the fixing rod (211) rotates through the first limiting seat (15) at the front end and is installed with a rotating plate (213), a compression spring (214) is rotatably connected to the horizontal end of the L-shaped slider (292), and the other end of the compression spring (214) is fixedly connected to one end of the rotating plate (213).

6. The automatic welding device that is easy to adjust according to claim 5, characterized in that; Two side wall extrusion seats (221) are installed between the two groups of first limit seats (15) located at the front end, and the side wall extrusion seats (221) of each group are arranged along a ring shape.

7. The automatic welding device that is easy to adjust according to claim 6, characterized in that: A limiting seat (215) is installed on one side of the first limiting seat (15) located at the front end, and a limiting rod is installed in the middle of the rotating plate (213), and the limiting rod can slide in a limited manner inside the limiting seat (215).

8. An automatic welding device that is easy to adjust according to claim 1 or 4, characterized in that: The gap adjustment component (3) comprises: A worm (31) rotatably connected to the interior of the telescopic extrusion seat (14); A twisting cap (32) is fixedly mounted on one end of the worm (31), and one end of the worm (31) extends out of the front end of the telescopic extrusion seat (14); A worm wheel (33) rotatably connected to the inner cavity of the telescopic extrusion seat (14); A first bevel gear (34) mounted on the left side of the worm gear (33); A second bevel gear (35) is rotatably connected to the inner cavity of the telescopic extrusion seat (14) and meshes with the upper portion of the first bevel gear (34); The plug plate (36) is located in the middle of the telescopic extrusion seat (14), and a slot for rotating the plug plate (36) is provided on the top of the telescopic extrusion seat (14). The bottom of the plug plate (36) is fixedly connected to the top of the second bevel gear (35) via a rotating rod. The laser lamp (294) is installed in the middle of the plug plate (36). The top of the plug plate (36) is pointed, and the cross section of the plug plate (36) is arranged in a plate shape.

9. The automatic welding device that is easy to adjust according to claim 8, characterized in that: A dial (321) is installed on the side of the twisting cap (32) facing away from the telescopic extrusion seat (14), and a scale needle (322) is installed on the top of the telescopic extrusion seat (14) on the side corresponding to the dial (321).

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