Welding device with welding seam width compensation function

Abstract

The utility model discloses a welding device with a welding seam width compensation function, which belongs to the technical field of welding devices, and comprises a support, a first self-centering rotary supporting structure, a second self-centering rotary supporting structure, a second self-centering rotary supporting structure, a third self-centering rotary supporting structure, a third self-centering rotary supporting structure and a fourth self-centering rotary supporting structure, the electrode rod assembly is at least partially installed on the self-centering rotary supporting device and provided with a channel extending in the axial direction of the electrode rod assembly so that a welding wire can penetrate through the channel. The axis of the second self-centering rotary supporting structure is located on the central axis, at least part of the electrode rod assembly is installed on the second self-centering rotary supporting structure, and the electrode rod assembly and the second self-centering rotary supporting structure are in sliding fit; the execution end of the lifting mechanism is connected with the second self-centering rotary supporting structure; the welding seam width is compensated through swinging of the electrode rod assembly and the adjustable swinging amplitude, and it can be ensured that welding wire solution is more evenly and fully filled into a welding seam gap.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding device technical field especially relates to a welding device with weld width compensation function. BACKGROUND

[0002] In the welding technical field, how to ensure that the weld filling is uniform and high quality is an important challenge faced by the welding process. The traditional welding device is often difficult to cope with the slight change of the weld width (mainly caused by tolerance or processing failure, etc.), resulting in the weld with different widths, local non-filling and other defects, which affects the strength and sealing of the welded joint and reduces the overall quality of the welding. The specific performance is that the inconsistency of the weld width will lead to uneven appearance of the weld, and even the reliability of the welded joint may be reduced due to insufficient filling, affecting the long-term performance and use safety of the product. SUMMARY

[0003] The utility model embodiment provides a welding device with weld width compensation function to solve the problem in prior art.

[0004] The utility model embodiment adopts the following technical scheme: a welding device with weld width compensation function, comprising: a support, the support is provided with a first self-centering rotary support structure which is eccentrically rotated around a center axis by power driving; an electrode rod assembly, at least part of which is installed on the self-centering rotary support device, and the electrode rod assembly has a channel extending along its axial direction for a welding wire to pass through; a second self-centering rotary support structure, the axis of which is located on the center axis, and the electrode rod assembly is at least partially installed on the second self-centering rotary support structure and is slidingly connected therebetween; a lifting mechanism, the execution end of which is connected with the second self-centering rotary support structure to drive the second self-centering rotary support structure to move along the center axis.

[0005] Preferably, the lifting mechanism comprises: a lead screw, at least part of which is rotatably installed on the support; a first connecting piece, the second self-centering rotary support structure is installed on the first connecting piece, and the lead screw penetrates the first connecting piece and is threadedly connected therewith; the lead screw is driven to rotate by power to drive the first connecting piece to move along the direction of the center axis.

[0006] Preferably, a first rotary driving source is installed on the support, the output shaft of the first rotary driving source is fixedly sleeved with a driving gear, a driven gear is also rotatably installed on the support, and the driven gear is meshingly connected with the driving gear, the first self-centering rotary support structure is coaxially installed in the eccentric hole of the driven gear, and the rotation axis of the driven gear coincides with the center axis.

[0007] Preferably, the first self-centering rotary support structure and the second self-centering rotary support structure are configured as a self-aligning ball bearing.

[0008] Preferably, the electrode rod assembly comprises: a conductive rod, a conductive nozzle coaxially mounted at the end of the conductive rod; an adjusting rod sleeve coaxially arranged on the side of the conductive rod away from the conductive nozzle; a second connecting piece arranged between the conductive rod and the adjusting rod sleeve to connect the two; the first self-centering rotary support structure is sleeved on the adjusting rod sleeve, and the axial position of the first self-centering rotary support structure is limited by the first limiting wall on the adjusting rod sleeve and the second limiting wall of the second connecting piece; and the second self-centering rotary support structure is slidingly sleeved on the adjusting rod sleeve.

[0009] Preferably, the second connecting piece is configured as an internally threaded sleeve; one end of the adjusting rod sleeve and the conductive rod is provided with an externally threaded end, and the externally threaded ends are threadedly connected in the internally threaded sleeve.

[0010] Preferably, the lifting mechanism further comprises a second rotary drive source and a belt pulley set; the second rotary drive source is mounted on the bracket and the output shaft is drivingly connected with the lead screw through the belt pulley set to drive the lead screw to rotate.

[0011] Preferably, at least one pipeline for spraying protective gas is further mounted on the bracket, and the outlet of the pipeline is located at the end of the conductive nozzle.

[0012] The above at least one technical scheme adopted by the embodiment of the utility model can achieve the following beneficial effects:

[0013] Firstly, the electrode rod assembly can compensate the weld width through swinging and adjustable swinging amplitude, so that the welding wire solution can be more uniformly and sufficiently filled into the weld gap, defects such as different weld widths and local underfilling can be avoided, the appearance of the weld is more flat and beautiful, the overall welding quality is improved, and the strength and sealing performance of the welded joint are ensured.

[0014] Secondly, the device can cope with the welds with different width changes, does not need to frequently replace the welding tool or adjust the complex welding parameters, greatly enhances the adaptability of the welding process to various workpieces and various weld specifications, and can be quickly put into use when facing different batches and different designs of workpieces to be welded, thereby improving the welding production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the utility model, constitute a part of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0017] Figure 2 is a sectional view of the three-dimensional structure of the utility model;

[0018] Figure 3 is a three-dimensional structure schematic diagram of the lifting mechanism of the utility model;

[0019] Figure 4 is a three-dimensional view of the electrode rod assembly and the first self-centering rotary support structure of the utility model;

[0020] Figure 5 is a sectional view of the driven gear of the utility model;

[0021] Figure 6 is a partial exploded view of the electrode rod assembly and the first self-centering rotary support structure of the utility model.

[0022] Reference signs

[0023] 1 - support; 11 - first rotary drive source; 12 - drive gear; 13 - driven gear; 131 - eccentric hole; 14 - pipeline; 2 - first self-centering rotary support structure; 3 - electrode rod assembly; 31 - channel; 32 - conductive rod; 33 - conductive nozzle; 34 - adjusting rod sleeve; 341 - first limiting wall 35 - second connecting piece; 351 - second limiting wall 4 - second self-centering rotary support structure; 5 - lifting mechanism; 51 - lead screw; 52 - first connecting piece; 53 - second rotary drive source; 54 - pulley set. DETAILED DESCRIPTION

[0024] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0025] The technical solutions provided by the embodiments of the utility model are described in detail in combination with the drawings as follows.

[0026] Referring to Figures 1 to 6 The utility model embodiment provides a welding device with weld width compensation function mainly including support 1, first self-centering rotary support structure 2, electrode rod assembly 3, second self-centering rotary support structure 4 and lifting mechanism 5.

[0027] The first self-centering rotary support structure 2 is located between the supports 1 and is driven to rotate eccentrically around the central axis; the electrode rod assembly 3 is at least partially mounted on the self-centering rotary support device, and the electrode rod assembly 3 has a channel 31 extending along its axial direction for the welding wire to pass through; the second self-centering rotary support structure 4 has its axis located on the central axis, and the electrode rod assembly 3 is at least partially mounted on the second self-centering rotary support structure 4 and is in sliding fit therebetween (the first self-centering rotary support structure 2 and the second self-centering rotary support structure 4 generally adopt a self-aligning ball bearing).

[0028] In some practical applications, as shown in Figure 2 、 Figure 4 and Figure 6 , the electrode rod assembly 3 comprises: a conductive rod 32, the distal end of which is coaxially provided with a conductive nozzle 33; an adjusting rod sleeve 34 is coaxially arranged on the side of the conductive rod 32 away from the conductive nozzle 33; a second connecting piece 35 is arranged between the conductive rod 32 and the adjusting rod sleeve 34 to connect the two; the first self-centering rotary support structure 2 is sleeved on the adjusting rod sleeve 34, and the axial position of the first self-centering rotary support structure 2 is limited by the first limiting wall 341 on the adjusting rod sleeve 34 and the second limiting wall 351 of the second connecting piece 35, and the second self-centering rotary support structure 4 is slidably sleeved on the adjusting rod sleeve 34. The conductive rod 32 and the conductive nozzle 33 are prior art, the conductive rod 32 is an important part of current transmission, one end of which is usually in contact with the power supply connection line inside the welding gun (equivalent to the welding device of the present application), which can receive the current output from the welding power supply, then conduct the current along itself to the other end, that is, the part connected to the conductive nozzle 33, the conductive nozzle 33 is at the end of the current transmission path, which is connected to the conductive rod 32, receives the current conducted from the conductive rod 32, and transmits the current to the welding wire. In the welding process, the welding wire passes out of the conductive nozzle 33, when the current is transmitted to the welding wire through the conductive nozzle 33, the welding wire and the welding part can form a loop, and a high-temperature arc is generated at the end of the welding wire, which is a key link to realize welding, ensuring that the required electric energy for welding can accurately act on the welding wire to cause the melting of the welding wire.

[0029] The execution end of the lifting mechanism 5 is connected with the second self-centering rotary support structure 4 to drive the second self-centering rotary support structure 4 to move along the central axis.

[0030] In the embodiment, the first self-centering rotary support structure 2 is eccentrically rotated to drive the electrode rod assembly 3 to swing in a circular or elliptical manner with the second self-centering rotary support structure 4 as a swing fulcrum, so that the welding wire solution melted by the motor rod assembly can be distributed in the gap of the workpiece to be welded in a swinging manner, and then through the operation of the lifting mechanism 5, the distance between the second self-centering rotary support structure 4 and the first self-centering rotary support structure 2 can be changed, that is, the position of the swing fulcrum is changed, so that the swing amplitude of the electrode rod assembly 3 can be changed, thereby compensating for the different small width distances of the weld.

[0031] Therefore, by means of the swing of the electrode rod assembly 3 and the adjustable swing amplitude, the weld width is compensated, which can ensure that the welding wire solution is more uniformly and fully filled into the weld gap, avoid defects such as uneven weld width and local underfilling, make the appearance of the weld more flat and beautiful, improve the overall welding quality, and ensure the strength and sealing performance of the welded joint.

[0032] In addition, the device can cope with different width changes of the weld, without the need to frequently replace the welding tool or adjust complex welding parameters, greatly enhancing the adaptability of the welding process to various workpieces and various weld specifications. When facing different batches and different designs of workpieces to be welded, it can be quickly put into use to improve the welding production efficiency.

[0033] In some actual applications, as shown in Figures 2 to 3 , the lifting mechanism 5 includes a lead screw 51, a first connecting piece 52, a second rotary driving source 53, and a belt pulley set 54.

[0034] The lead screw 51 is at least partially rotatably installed on the support 1; the second self-centering rotary support structure 4 is installed on the first connecting piece 52, the lead screw 51 penetrates the first connecting piece and is threadedly connected therewith; the lead screw 51 is driven to rotate by a power source to drive the first connecting piece 52 to move along the direction of the center axis. Specifically, the second rotary driving source 53 is installed on the support 1 and the output shaft is drivingly connected with the lead screw 51 through the belt pulley set 54 to drive the lead screw 51 to rotate.

[0035] In some actual applications, as shown in Figure 2 , Figures 4 to 5 , based on the eccentric rotation of the electrode rod assembly 3, the following mode can be adopted: the support 1 is provided with a first rotary driving source 11, the output shaft of the first rotary driving source 11 is fixedly sleeved with a driving gear 12, the support 1 is also rotatably provided with a driven gear 13, and the driven gear 13 is in meshing connection with the driving gear 12, the first self-centering rotary support structure 2 is coaxially installed in the eccentric hole 131 of the driven gear 13, and the rotation axis of the driven gear 13 coincides with the center axis.

[0036] In the embodiment, the output shaft of the first rotating driving source 11 is fixedly sleeved with the driving gear 12, and the driving gear 12 rotates when the first rotating driving source 11 starts. Since the support 1 is further rotationally provided with the driven gear 13 which is in meshing connection with the driving gear 12, the rotation of the driving gear 12 will drive the driven gear 13 to rotate synchronously. The first self-centering rotating support structure 2 is coaxially arranged in the eccentric hole 131 of the driven gear 13, and the rotation axis of the driven gear 13 coincides with the central axis, so that the rotation of the driven gear 13 will drive the first self-centering rotating support structure 2 to eccentrically rotate around the central axis. The transmission mode has a relatively compact structure, and the characteristics of gear meshing can accurately transmit power and movement, thereby ensuring the stability and reliability of the eccentric rotation of the first self-centering rotating support structure 2, and providing a stable and controllable power source for the circular or elliptical swinging of the electrode rod assembly 3, which is conducive to accurately controlling the swinging track and coverage range of the welding wire solution in the welding process, and further improves the accuracy of the welding device in compensating for different weld widths.

[0037] In other practical applications, as shown in Figure 2 、 Figure 4 and Figure 6 , the electrode rod assembly 3 is further optimized and designed, and the second connecting piece 35, the adjusting rod sleeve 34 and the conductive rod 32 of the electrode rod assembly 3 are arranged in a detachable structure. Specifically, the second connecting piece 35 is configured as an internally threaded sleeve; one end of the adjusting rod sleeve 34 and the conductive rod 32 is provided with an externally threaded end, and both are threadedly connected to the internally threaded sleeve through the corresponding externally threaded end. Through the threaded connection of the internally threaded sleeve and the externally threaded end, the assembly and disassembly of each component are facilitated. When the electrode rod assembly 3 is maintained, repaired or parts are replaced, the operator can easily rotate the adjusting rod sleeve 34 and the conductive rod 32 from the second connecting piece 35, and check, repair or replace individual components without the need to replace the entire electrode rod assembly 3, thereby greatly reducing the maintenance cost and time cost.

[0038] In some practical applications, at least one pipeline 14 for spraying protective gas (as shown in Figure 1 ) is further arranged on the support 1, and the outlet of the pipeline 14 is located at the end of the conductive nozzle 33. In actual production, two groups of the pipeline 14 are arranged, and are symmetrically distributed on the outer circumferential side of the conductive nozzle 33. The protective gas can isolate air, stabilize the electric arc, and reduce the splashing of the welding liquid.

[0039] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make minor changes or modifications to the disclosed technical content, or make equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change or modification of the above embodiments, which does not depart from the technical solution of the present application, is still within the scope of the technical solution of the present application.

Claims

1. A welding device with weld width compensation function, characterized in that, The application relates to a welding electrode holder, which comprises the following components: a support (1) provided with a first self-centering rotary support structure (2) eccentrically rotating around a central axis by power driving; an electrode rod assembly (3) at least partially mounted on the first self-centering rotary support structure, and the electrode rod assembly (3) is provided with a channel (31) extending along the axial direction of the electrode rod assembly for a welding wire to pass through; a second self-centering rotary support structure (4) with the axis located on the central axis, and the electrode rod assembly (3) is at least partially mounted on the second self-centering rotary support structure (4) and is in sliding fit with the second self-centering rotary support structure (4); a lifting mechanism (5) with the execution end connected with the second self-centering rotary support structure (4) to drive the second self-centering rotary support structure (4) to move along the central axis.

2. The welding device having a weld bead width compensation function according to claim 1, characterized by, The lifting mechanism (5) comprises: a screw rod (51) at least partially rotationally mounted on the support (1); a first connecting piece (52) on which the second self-centering rotary support structure (4) is mounted, and the screw rod (51) penetrates the first connecting piece and is in threaded connection with the first connecting piece; the screw rod (51) is driven to rotate to drive the first connecting piece (52) to move along the direction of the central axis.

3. The welding device having a weld bead width compensation function according to claim 1, characterized by, The support (1) is provided with a first rotary driving source (11), the output shaft of the first rotary driving source (11) is provided with a driving gear (12), the support (1) is further provided with a driven gear (13) rotationally mounted thereon, the driven gear (13) is in meshing connection with the driving gear (12), the first self-centering rotary support structure (2) is coaxially mounted in an eccentric hole (131) of the driven gear (13), and the rotation axis of the driven gear (13) coincides with the central axis.

4. The welding apparatus having a weld bead width compensation function according to claim 1, characterized by The first self-centering rotary support structure (2) and the second self-centering rotary support structure (4) are both configured as self-aligning ball bearings.

5. The welding apparatus having a weld bead width compensation function according to claim 1, characterized by The electrode rod assembly (3) comprises: a conductive rod (32) with a conductive nozzle (33) coaxially mounted at the end of the conductive rod (32); an adjusting rod sleeve (34) coaxially arranged on the side of the conductive rod (32) away from the conductive nozzle (33); a second connecting piece (35) arranged between the conductive rod (32) and the adjusting rod sleeve (34) to connect the conductive rod (32) and the adjusting rod sleeve (34); the first self-centering rotary support structure (2) is sleeved on the adjusting rod sleeve (34), and the axial position of the first self-centering rotary support structure (2) is limited by a first limiting wall (341) on the adjusting rod sleeve (34) and a second limiting wall (351) of the second connecting piece (35), and the second self-centering rotary support structure (4) is sleeved on the adjusting rod sleeve (34) in a sliding mode.

6. The welding apparatus having a weld bead width compensation function according to claim 5, characterized by The second connecting piece (35) is configured as an internally-threaded sleeve; one end of the adjusting rod sleeve (34) and the conductive rod (32) is provided as an externally-threaded end, and the externally-threaded ends are both in threaded connection in the internally-threaded sleeve.

7. The welding apparatus having a weld bead width compensation function according to claim 2, characterized by The lifting mechanism (5) further comprises a second rotary driving source (53) and a pulley set (54); the second rotary driving source (53) is mounted on the support (1) and the output shaft is in transmission connection with the screw rod (51) through the pulley set (54) to drive the screw rod (51) to rotate.

8. The welding apparatus having a weld bead width compensation function according to claim 5, wherein At least one pipe (14) for spraying protective gas is installed on the support (1), and the outlet of the pipe (14) is located at the end of the conducting nozzle (33).

9. The welding apparatus having a weld bead width compensation function according to claim 8, characterized by, The pipe (14) is configured in two groups and symmetrically distributed on the outer circumferential side of the conducting nozzle (33).

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