Tracking welding mechanism

Abstract

The utility model provides a tracking welding mechanism, which is used for tracking and welding a workpiece and comprises a welding gun, a welding rod and a welding rod, the rotary table mechanism comprises a rotary table base and a rotary platform capable of rotating relative to the rotary table base, the welding gun is fixedly installed on the rotary platform, and the rotary table mechanism is used for adjusting the welding angle between the welding gun and the workpiece before welding; the elastic stroke mechanism comprises a fixed seat, a sliding block and an elastic piece which is connected between the fixed seat and the sliding block in an abutting mode, and the sliding block is fixedly connected with the rotary table base; the elastic stroke mechanism further comprises a ball ejector rod, the ball ejector rod is fixedly installed on the rotating platform, and in the welding process, the ball ejector rod is kept to be attached to the surface of the workpiece through the elastic piece so that the distance between the welding gun and the workpiece can be kept constant.

Description

Technical Field

[0001] The invention relates to the technical field of tracking welding, and in particular to a tracking welding mechanism. Background Art

[0002] During automatic welding, if the concentricity or parallelism deviation between the welding gun and the workpiece welding path is large, or when processing workpieces with irregular surfaces, the welding quality may be unstable due to the change in the welding gap (discharge distance) of the welding gun, and even needle sticking may occur. Therefore, during production, the equipment needs to be able to automatically control the distance between the welding gun and the processing surface. The existing photoelectric technology control is too costly and the system is highly complex. It is too difficult to add this function to ordinary equipment.

[0003] Therefore, how to ensure that the distance between the welding gun and the workpiece surface remains constant needs to be solved urgently. Summary of the invention

[0004] The object of the present invention is to provide a tracking welding mechanism to ensure that the distance between the welding gun and the surface of the workpiece remains constant.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A tracking welding mechanism is used to track a welding workpiece, and the tracking welding mechanism comprises:

[0007] Welding gun, used for welding workpieces;

[0008] A turntable mechanism, comprising a turntable base and a rotating platform capable of rotating relative to the turntable base, the welding gun being fixedly mounted on the rotating platform, and the turntable mechanism being used to adjust a welding angle between the welding gun and the workpiece before welding;

[0009] The elastic travel base comprises a fixed base, a sliding block and an elastic member abutting between the fixed base and the sliding block, wherein the sliding block is fixedly connected to the turntable base;

[0010] Among them, the elastic stroke base also includes a ball push rod, which is fixedly installed on the rotating platform. During the welding process, the ball push rod is kept in contact with the surface of the workpiece via the elastic member to keep the distance between the welding gun and the workpiece constant.

[0011] In some embodiments of the present invention, the ball ejector comprises:

[0012] A rod, fixedly mounted on the rotating platform, one end of the rod being provided with a spherical inner cavity with a port;

[0013] The ball is partially accommodated in the spherical inner cavity and can roll in the spherical inner cavity. The ball is used to fit the surface of the workpiece and roll under the drive of the workpiece.

[0014] In some embodiments of the present invention, the elastic stroke base further includes a fixed block fixedly connected to the rotating platform, the fixed block is provided with a through hole, and the rod passes through the through hole and is threadedly connected thereto.

[0015] In some embodiments of the present invention, the elastic travel base further includes a guide column, the longitudinal direction of the guide column is the same as the telescopic direction of the elastic member, and both ends of the longitudinal direction of the guide column are fixedly connected to the fixing seat;

[0016] The sliding block is provided with a penetrating guide hole, the guide post penetrates the guide hole, and the sliding block can move along the longitudinal direction of the guide post.

[0017] In some embodiments of the present invention, the number of the guide posts is two, and the two guide posts are respectively arranged in parallel on two sides of the elastic member;

[0018] The number of the guide holes is two, the longitudinal directions of the two guide holes are parallel to each other, and each guide column passes through one guide hole respectively.

[0019] In some embodiments of the present invention, the fixing seat includes a first part and a second part vertically connected to each other, and the first part abuts against one end of the elastic member.

[0020] In some embodiments of the present invention, the first portion of the fixing seat is provided with a first limiting protrusion, the sliding block is provided with a second limiting protrusion, and the first limiting protrusion and the second limiting protrusion are respectively provided at two ends of the elastic member in the extension direction;

[0021] The elastic member is a spring, one end of which is sleeved on the outer circumference of the first limiting protrusion, and the other end of which is sleeved on the outer circumference of the second limiting protrusion.

[0022] In some embodiments of the present invention, the elastic travel base further comprises a limit block fixedly connected to the second portion of the fixing seat, and the limit block is opposite to the first portion of the fixing seat;

[0023] One end of the guide column is fixed to the first part of the fixing seat via a hexagon socket mounting bolt, and the other end is fixed to the limiting block via a flat head screw.

[0024] In some embodiments of the present invention, the turntable base is provided with:

[0025] A coarse adjustment knob, used for coarsely adjusting the rotation angle of the rotating platform relative to the turntable base;

[0026] A fine-tuning knob, used for fine-tuning the rotation angle of the rotating platform relative to the turntable base;

[0027] The locking knob is used to lock the rotation angle of the rotating platform relative to the turntable base.

[0028] In some embodiments of the present invention, the number of the ball ejector rods is two, and the two ball ejector rods are respectively arranged on both sides of the welding gun.

[0029] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0030] The invention provides a tracking welding mechanism, which can control the welding gap between the welding gun and the workpiece surface at low cost by setting a structure with adaptive elastic stroke function to keep the welding gun and the distance between the welding gun and the workpiece surface constant. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some implementation plans of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic structural diagram of a tracking welding mechanism provided by a first embodiment of the present invention at a first viewing angle;

[0033] Figure 2 for Figure 1 A local enlarged schematic diagram of the A area in FIG.

[0034] Figure 3 for Figure 1 A schematic diagram of the structure of the tracking welding mechanism in the second observation angle;

[0035] Figure 4 A schematic structural diagram of a tracking welding mechanism provided by the second embodiment of the present invention at a third viewing angle;

[0036] Figure 5 for Figure 4 A local enlarged schematic diagram of the C region in FIG.

[0037] Figure 6 for Figure 1 An enlarged schematic diagram of some mechanisms in the fourth observation angle;

[0038] Figure 7 for Figure 6 A cross-sectional view of a part of the mechanism;

[0039] Figure 8 for Figure 6 An enlarged schematic diagram of some mechanisms in the fifth observation angle;

[0040] Fig. 9 for Figure 6 A cross-sectional view of a part of the mechanism;

[0041] Fig.10 for Figure 6 A schematic diagram of the structure of the ball ejector in FIG.

[0042] Fig.11 for Figure 1 A schematic diagram of the structure of the elastic travel base;

[0043] Fig.12 for Fig.11 A cross-sectional view of the elastic travel base in FIG.

[0044] Fig.13 for Fig.11 A schematic structural diagram of the elastic travel base at a sixth viewing angle;

[0045] Fig.14 for Figure 1 Schematic diagram of the structure of the turntable mechanism.

[0046] The main reference numerals in the drawings of this application specification are described as follows:

[0047] 1- welding gun;

[0048] 2-turntable mechanism; 21-turntable base; 211-coarse adjustment knob; 212-fine adjustment knob; 213-locking knob; 22-rotating platform;

[0049] 3-elastic stroke base; 31-fixed seat; 311-first part; 3111-first limiting protrusion; 312-second part; 32-sliding block; 321-second limiting protrusion; 33-elastic member; 34-ball top rod; 341-rod; 342-ball; 35-fixed block; 36-guide column; 37-limiting block; 38-hexagon socket mounting bolt; 39-flat head screw;

[0050] X - The rotation direction of the rotating platform. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present invention. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0052] Any specific numerical value disclosed herein (including the endpoint of the numerical range) is not limited to the exact value of the numerical value, but should be understood to also cover values ​​close to the exact value, such as all possible values ​​within the range of ±5% of the exact value. In addition, for the disclosed numerical range, the endpoint values ​​of the range, the endpoint values ​​and the specific point values ​​in the range, and the specific point values ​​can be arbitrarily combined to obtain one or more new numerical ranges, and these new numerical ranges should also be regarded as specifically disclosed herein.

[0053] Unless otherwise specified, the terms used herein have the same meaning as commonly understood by those skilled in the art. If a term is defined herein and its definition is different from the commonly understood meaning in the art, the definition herein shall prevail.

[0054] See also Figures 1 to 14 , a tracking welding mechanism, used for tracking welding workpieces, the tracking welding mechanism comprising: a welding gun 1, used for welding workpieces; a turntable mechanism 2, comprising a turntable base 21 and a rotating platform 22 that can rotate relative to the turntable base 21, the welding gun 1 is fixedly mounted on the rotating platform 22, and the turntable mechanism 2 is used to adjust the welding angle between the welding gun 1 and the workpiece before welding; an elastic stroke base 3, comprising a fixed seat 31, a sliding block 32 and an elastic member 33 abutting between the fixed seat 31 and the sliding block 32, the sliding block 32 is fixedly connected to the turntable base 21; wherein the elastic stroke base 3 also includes a ball ejector 34, the ball ejector 34 is fixedly mounted on the rotating platform 22, and during the welding process, the ball ejector 34 is kept in contact with the surface of the workpiece via the elastic member 33, so that the distance between the welding gun 1 and the workpiece remains constant.

[0055] For details, see Figures 1 to 3 as well as Figure 8 The ball push rod 34 is against the surface of the workpiece, and the elastic member 33 in the elastic stroke base 3 can make the sliding block 32 move toward the direction of the workpiece, so that the ball push rod 34 can be tightly against the surface of the workpiece, and then the welding gun 1 can maintain a constant distance from the surface of the workpiece, thereby ensuring that the quality of welding is sufficiently stable and reliable.

[0056] It is worth noting that see Figure 2 The above-mentioned “distance between the welding gun 1 and the workpiece surface” refers to the straight-line distance between the muzzle of the welding gun 1 and the welding point on the workpiece surface. Figure 2 See the “B” legend in Figure 5 The above-mentioned "welding angle" refers to the angle between the direction of the muzzle of the welding gun 1 at each moment and the tangent direction of the welding position on the surface of the workpiece to which the muzzle of the welding gun 1 is aimed at at that moment, such as Figure 5 As shown in the legend “α”.

[0057] Exemplarily, the value range of the welding angle α can be 25° to 90°, specifically any one of 30°, 40°, 45°, 50°, 60°, 70° or 80°, or a range consisting of any two values.

[0058] It should be noted that the tracking welding mechanism provided by the present invention is suitable for various welding positions including flat welding, vertical welding, and horizontal welding; it is also suitable for various welding joint forms including butt welding, fillet welding, T-joint welding, lap welding, etc.; in addition, the tracking welding mechanism provided by the present invention is particularly suitable for gas shielded welding, specifically tungsten inert gas shielded welding and metal electrode gas shielded welding.

[0059] See also Figures 1 to 10 In some embodiments of the present invention, it is understandable that a specific model of welding gun 1 and specific welding process parameters, such as temperature and power, can be selected according to the actual application scenario.

[0060] See also Figures 6 to 10 In some embodiments of the present invention, the ball push rod 34 includes: a rod 341, fixedly mounted on the rotating platform 22, one end of the rod 341 is provided with a spherical inner cavity with a port; a ball 342, partially accommodated in the spherical inner cavity and capable of rolling in the spherical inner cavity, and the ball 342 is used to fit the surface of the workpiece and roll under the drive of the workpiece.

[0061] For details, see Figures 1 to 5 The spherical ball 342 can roll along the surface of the workpiece and drive the elastic member 32 to move relative to the fixing seat 31 by abutting the rod 341, thereby ensuring that the relative position between the rod 341 and the workpiece surface is constant, thereby ensuring that the position between the welding gun 1 and the workpiece surface is constant, thereby improving the welding quality.

[0062] See also Figures 3 to 6 In some embodiments of the present invention, the elastic stroke base 3 also includes a fixed block 35 fixedly connected to the rotating platform 22, and the fixed block 35 is provided with a through hole, and the rod 341 passes through the through hole and is threadedly connected thereto.

[0063] Specifically, the ball ejector 34 is fixedly connected to the rotating platform 22 through the fixing block 35; further, the rod 341 in the ball ejector 34 is fixedly connected to the fixing block 35. It is worth noting that since the rod 341 is threadedly connected to the through hole, before welding, the rod 341 can be screwed to adjust the relative position between the rod 341 and the fixing block 35, so as to adjust the ball ejector 34 in this way, thereby adjusting the required processing distance between the welding gun 1 and the workpiece surface, and welding can be performed after the adjustment is completed; during the welding process, no unnecessary slippage will occur between the ball ejector 34 and the fixing block 35, thereby ensuring that the relative position between the ball ejector 24 and the workpiece is constant, and the distance between the welding gun 1 and the workpiece is kept constant, so that the tracking welding mechanism provided by the present invention can ensure that the distance between the welding gun 1 and the workpiece surface is constant, thereby providing stable welding quality.

[0064] It is understandable that the above-mentioned "the rod 341 passes through the through hole and is threadedly connected thereto" means that at least part of the outer circumference of the rod 341 is provided with threads, and at least part of the inner circumference of the through hole is provided with threads matching therewith. This threaded connection structure also has the function of "presetting the distance between the muzzle of the welding gun 1 and the welding point on the surface of the workpiece".

[0065] See also Figures 11 to 13 In some embodiments of the present invention, the elastic stroke base 3 further includes a guide column 36, the longitudinal direction of the guide column 36 is the same as the telescopic direction of the elastic member 33, and the two ends of the longitudinal direction of the guide column 36 are fixedly connected to the fixed seat 31; the sliding block 32 is provided with a penetrating guide hole, the guide column 36 penetrates the guide hole, and the sliding block 32 can move along the longitudinal direction of the guide column 36. The above-mentioned guide column 36 can make the movement of the sliding block 32 relative to the fixed seat 31 more stable.

[0066] See also Figures 11 to 13 In some embodiments of the present invention, there are two guide posts 36, which are respectively arranged in parallel on both sides of the elastic member 33; there are two guide holes, which are longitudinally parallel to each other, and each guide post 36 passes through one guide hole. Obviously, the symmetrical design of "arranging two guide posts 36 in parallel on both sides of the elastic member 33" is more stable, and can make the movement of the sliding block 32 relative to the fixing seat 31 more stable and reliable.

[0067] See also Figures 11 to 13In some embodiments of the present invention, the fixing seat 31 includes a first portion 311 and a second portion 312 which are vertically connected to each other, and the first portion 311 abuts against one end of the elastic member 33. It should be noted that in some embodiments, the second portion 312 of the fixing seat 31 does not contact the sliding block 32, that is, there is a certain gap between the two, and the sliding block 32 is supported on the guide column 36, that is, the weight of the sliding block 32 presses on the guide column 36, and the weight of the guide column 36 presses on the fixing seat 31. The fixing seat 31 of the above structure has good structural rigidity and stability.

[0068] See also Fig.11 and Fig.12 In some embodiments of the present invention, the first portion 311 of the fixing seat 31 is provided with a first limiting protrusion 3111, and the sliding block 32 is provided with a second limiting protrusion 321. The first limiting protrusion 3111 and the second limiting protrusion 321 are respectively provided at the two ends of the elastic member 33 in the extension direction; the elastic member 33 is a spring, one end of the spring is sleeved on the outer periphery of the first limiting protrusion 3111, and the other end is sleeved on the outer periphery of the second limiting protrusion 321. It is worth noting that the first limiting protrusion 3111 and the second limiting protrusion 321 function to fix the two ends of the spring. It is understandable that the specific shapes and sizes of the first limiting protrusion 311 and the second limiting protrusion 321 can be selected and adjusted according to the actual application standards.

[0069] In some other embodiments of the present invention, both ends of the spring may also be fixed to the first portion 311 of the fixing seat 31 and the sliding block 32 by welding or elastic pre-tightening.

[0070] See also Figure 11 to Figure 12 In some embodiments of the present invention, the elastic stroke base 3 also includes a limit block 37 fixedly connected to the second part 312 of the fixed seat 31, and the limit block 37 is opposite to the first part 311 of the fixed seat 31; one end of the guide column 36 is fixed to the first part 311 of the fixed seat 31 via a hexagon socket mounting bolt 38, and the other end is fixed to the limit block 37 via a flat head screw 39.

[0071] It is worth mentioning that the function of the limit block 37 is to limit the maximum movable stroke of the sliding block 32, thereby limiting the maximum movable stroke of the elastic member 33. During use, the elastic member 33 should always be in a compressed state, so that the sliding block 32 always has a tendency to "approach the workpiece", thereby ensuring that the ball 342 of the ball push rod 34 can always be in close contact with the surface of the workpiece, thereby ensuring that the distance between the muzzle of the welding gun 1 and the surface of the workpiece remains constant, thereby improving the welding quality.

[0072] It is understandable that the specific model and size of the hexagon socket mounting bolt 38 and the flat head screw 39 can be selected and adjusted according to the actual application scenario.

[0073] See also Fig.14 In some embodiments of the present invention, the turntable base 21 is provided with: a coarse adjustment knob 211 for coarsely adjusting the rotation angle of the rotating platform 22 relative to the turntable base 21; a fine adjustment knob 212 for finely adjusting the rotation angle of the rotating platform 22 relative to the turntable base 21; and a locking knob 213 for locking the rotation angle of the rotating platform 22 relative to the turntable base 21.

[0074] It is worth noting that before welding, the rotation angle of the rotating platform 22 is adjusted in a larger rotation angle range by the coarse adjustment knob 211 in turn, so as to adjust the relative angle between the muzzle of the welding gun 1 and the surface of the workpiece within the larger rotation angle range; then the fine adjustment knob 212 is used to fine-tune the relative angle between the muzzle of the welding gun 1 and the surface of the workpiece within a smaller range to further improve the welding accuracy; after the adjustment is completed, the rotating platform 22 is locked by the locking knob 213 to prevent the rotating platform 22 from rotating during welding, thereby ensuring the welding quality.

[0075] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims. In addition, the specification uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. The content of this specification should not be understood as a limitation on the present invention.

Claims

1. A tracking welding mechanism, used for tracking a welding workpiece, characterized in that: The tracking welding mechanism comprises: A welding gun (1) for welding a workpiece; A turntable mechanism (2), comprising a turntable base (21) and a rotating platform (22) capable of rotating relative to the turntable base (21), the welding gun (1) being fixedly mounted on the rotating platform (22), and the turntable mechanism (2) being used to adjust a welding angle between the welding gun (1) and the workpiece before welding; An elastic travel base (3) comprising a fixed base (31), a sliding block (32), and an elastic member (33) abutting between the fixed base (31) and the sliding block (32), wherein the sliding block (32) is fixedly connected to the turntable base (21); The elastic stroke base (3) further comprises a ball push rod (34), wherein the ball push rod (34) is fixedly mounted on the rotating platform (22); during the welding process, the ball push rod (34) is kept in contact with the surface of the workpiece via the elastic member (33), so that the distance between the welding gun (1) and the workpiece remains constant.

2. The tracking welding mechanism according to claim 1, characterized in that: The ball ejector (34) comprises: A rod (341) is fixedly mounted on the rotating platform (22), and one end of the rod (341) is provided with a spherical inner cavity having a port; The ball (342) is partially accommodated in the spherical inner cavity and is capable of rolling in the spherical inner cavity. The ball (342) is used to fit the surface of the workpiece and roll under the drive of the workpiece.

3. The tracking welding mechanism according to claim 2, characterized in that: The elastic stroke base (3) further comprises a fixing block (35) fixedly connected to the rotating platform (22), wherein the fixing block (35) is provided with a through hole, and the rod (341) passes through the through hole and is threadedly connected thereto.

4. The tracking welding mechanism according to claim 1, characterized in that: The elastic travel base (3) further comprises a guide column (36), the longitudinal direction of the guide column (36) being the same as the telescopic direction of the elastic member (33), and both ends of the longitudinal direction of the guide column (36) being fixedly connected to the fixing seat (31); The sliding block (32) is provided with a penetrating guide hole, the guide column (36) penetrates the guide hole, and the sliding block (32) can move along the longitudinal direction of the guide column (36).

5. The tracking welding mechanism according to claim 4, characterized in that: The number of the guide posts (36) is two, and the two guide posts (36) are respectively arranged in parallel on two sides of the elastic member (33); The number of the guide holes is two, the longitudinal directions of the two guide holes are parallel to each other, and each guide column (36) passes through one of the guide holes.

6. The tracking welding mechanism according to claim 5, characterized in that: The fixing seat (31) comprises a first part (311) and a second part (312) which are vertically connected to each other, and the first part (311) abuts against one end of the elastic member (33).

7. The tracking welding mechanism according to claim 6, characterized in that: The first part (311) of the fixing seat (31) is provided with a first limiting protrusion (3111), and the sliding block (32) is provided with a second limiting protrusion (321), and the first limiting protrusion (3111) and the second limiting protrusion (321) are respectively arranged at two ends of the elastic member (33) in the extension direction. The elastic member (33) is a spring, one end of which is sleeved on the outer circumference of the first limiting protrusion (3111), and the other end of which is sleeved on the outer circumference of the second limiting protrusion (321).

8. The tracking welding mechanism according to claim 6, characterized in that: The elastic travel base (3) further comprises a limit block (37) fixedly connected to the second part (312) of the fixing seat (31), wherein the limit block (37) is arranged opposite to the first part (311) of the fixing seat (31); One end of the guide column (36) is fixed to the first part (311) of the fixing seat (31) via a hexagon socket mounting bolt (38), and the other end is fixed to the limiting block (37) via a flat head screw (39).

9. The tracking welding mechanism according to any one of claims 1 to 8, characterized in that: The turntable base (21) is provided with: A coarse adjustment knob (211) for coarsely adjusting the rotation angle of the rotating platform (22) relative to the turntable base (21); A fine-tuning knob (212) for fine-tuning the rotation angle of the rotating platform (22) relative to the turntable base (21); The locking knob (213) is used to lock the rotation angle of the rotating platform (22) relative to the turntable base (21).

10. The tracking welding mechanism according to any one of claims 1 to 8, characterized in that: The number of the ball push rods (34) is two, and the two ball push rods (34) are respectively arranged on two sides of the welding gun (1).

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