Welding tool

Abstract

The invention provides a welding tool, and belongs to the technical field of welding. The welding tool comprises a bottom positioning clamp, a support, a pressing assembly and a lifting air cylinder mechanism. One end of the support is fixed to the bottom positioning clamp, and the other end of the support is rotationally connected with the pressing assembly. The two ends of the lifting air cylinder mechanism are connected with the bottom positioning clamp and the pressing assembly respectively, the pressing assembly is provided with a through hole, and the through hole is opposite to a welding bead of a welding piece. The lifting air cylinder mechanism is used for driving the pressing assembly to rotate relative to the support, and the bottom positioning clamp is used for fixing a welding piece. The welding tool has an opening state and a clamping state. In the opening state, the lifting air cylinder mechanism extends, and the pressing assembly is separated from the top end of the welding piece. In the clamping state, the lifting air cylinder mechanism shrinks, and the pressing assembly abuts against the top end of the welding piece. And the pressing assembly can press the welding part. And it is guaranteed that a small lap joint gap is formed between the two welding pieces, and therefore the welding process can be carried out smoothly.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and in particular to a welding tool. Background Art

[0002] In the process of vehicle body manufacturing, laser welding is often required in places where it is inconvenient for the welding gun to reach. During the welding process, the welded parts need to be positioned and clamped on the welding fixture before welding begins; the laser welding process has the advantages of small heat-affected zone, small plate deformation, beautiful welds, and flexible welding space; however, laser welding has high requirements for the overlap gap between adjacent welded parts. If the weld is large, it is very easy to cause welding penetration, which not only seriously affects the welding strength, but also causes quality problems such as leakage, as well as cycle loss and cost waste caused by rework.

[0003] Therefore, how to ensure a smaller overlap gap between adjacent welded parts is a key issue that needs to be solved. Summary of the invention

[0004] The present disclosure provides a welding tool that can solve the technical problems existing in the related technology. The technical solution of the welding tool is as follows.

[0005] The present disclosure provides a welding tool, which comprises a bottom positioning fixture, a support, a clamping assembly and a lifting cylinder mechanism; One end of the support is fixed to the bottom positioning fixture, and the other end is rotatably connected to the clamping assembly. The two ends of the lifting cylinder mechanism are respectively connected to the bottom positioning fixture and the clamping assembly. The clamping assembly has a through hole, and the through hole is opposite to the weld bead of the welded part. The lifting cylinder mechanism is used to drive the clamping assembly to rotate relative to the support, wherein the bottom positioning fixture is used to fix the welded part; The welding tool has a clamping state and an opening state. In the clamping state, the lifting cylinder mechanism contracts and the clamping assembly abuts against the top end of the welding part. In the opening state, the lifting cylinder mechanism extends and the clamping assembly is separated from the top end of the welding part.

[0006] In a possible implementation, the lifting cylinder mechanism includes a first bracket, a second bracket and a lifting cylinder; One end of the first bracket is fixed to the bottom positioning fixture, and the other end extends along the first direction. The second bracket is fixed to the clamping assembly. One end of the lifting cylinder is connected to one end of the first bracket away from the bottom positioning fixture, and the other end is connected to the second bracket, wherein the first direction is the direction in which the clamping assembly points to the bottom positioning fixture.

[0007] In a possible implementation, the first bracket includes a first rod body, a second rod body and a connecting member; The first rod is fixed to the bottom positioning fixture, the second rod is bent together with the first rod, one end of the second rod away from the first rod extends along the first direction, the connecting piece is connected to a side of the second rod facing the support, and the lifting cylinder is hinged to the connecting piece.

[0008] In a possible implementation, one end of the second bracket is fixed to the clamping assembly, and the other end extends in a direction away from the bottom positioning fixture.

[0009] In a possible implementation, the second bracket includes a first plate body, a second plate body, and a third plate body connected in sequence; The first plate body, the second plate body and the third plate body are arranged in a bent manner, and the first plate body and the third plate body extend in opposite directions. The first plate body is fixed to the clamping assembly, and one end of the second plate body away from the first plate body extends in a direction away from the bottom positioning clamp, and the lifting cylinder is hinged to the third plate body.

[0010] In a possible implementation, the welding tool further includes a locking mechanism; The locking mechanism includes a column, a driving member and a locking block, the column is fixed to the bottom positioning fixture, the driving member is fixed to the column, the locking block and the driving member are transmission-connected, the driving member is used to drive the locking block to rotate, and in the clamping state, the clamping assembly is located between the column and the locking block.

[0011] In a possible implementation, the driving member includes a rotating cylinder and a rotating shaft; The locking block is connected to the rotating shaft, and when the rotating cylinder is working, the rotating shaft drives the locking block to rotate.

[0012] In a possible implementation, the clamping assembly includes a clamping plate and a clamping block assembly, the clamping plate is rotatably connected to the support, and the clamping block assembly is fixed to a side of the clamping plate facing the bottom positioning fixture; The pressing block assembly comprises an elastic member and a pressing block, and two ends of the elastic member are respectively connected to the pressing plate and the pressing block.

[0013] In a possible implementation, the elastic member is a spring; The clamping assembly also includes a bolt and a nut. The clamping plate is located between the nut and the elastic member. The clamping plate has a stepped hole. The bolt passes through the stepped hole and is connected to the nut. One end of the bolt away from the nut is slidably connected to the pressure block. The elastic member is sleeved around the bolt, and both ends of the elastic member are respectively against the step structure of the stepped hole and the pressure block.

[0014] In a possible implementation manner, the elastic member is a rubber block.

[0015] In a possible implementation, the pressing block includes a fixed block and a pressing block body; The pressing block body includes a first pressing plate and a second pressing plate arranged in a bent manner. The fixing block is located between the elastic member and the first pressing plate, and the fixing block is slidably connected to the bolt.

[0016] In a possible implementation manner, the pressing block includes the fixing block and a pressing block body.

[0017] In a possible implementation, the pressing block includes one fixed block and two pressing block bodies, and the first pressing plates of the two pressing block bodies are located between the second pressing plates of the two pressing block bodies.

[0018] In a possible implementation manner, each of the bolts is threadedly connected to the two nuts.

[0019] The technical solution provided by the present disclosure includes at least the following beneficial effects: The present disclosure provides a welding tool. Before welding, a welding piece is first placed on a bottom positioning fixture, and then another welding piece is placed on the welding piece. After the two welding pieces are positioned on the bottom positioning fixture, the lifting cylinder mechanism is contracted so that the clamping assembly clamps the welding pieces. In this way, a small overlap gap is ensured between the two welding pieces, so that the welding process proceeds smoothly. After the welding is completed, the lifting cylinder mechanism is extended, and then the welded welding piece is taken out of the welding tool.

[0020] In addition, due to the use of a lifting cylinder mechanism, the welding tooling can automatically press the welded parts, thereby quickly stabilizing the welded parts, which is conducive to realizing assembly line mass production.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description, are used to explain the principles of the present disclosure. In the drawings: Figure 1 is a structural schematic diagram of a welding tool in a clamped state shown in an embodiment of the present disclosure; Figure 2 is a structural schematic diagram of a welding tool in an open state shown in an embodiment of the present disclosure; Figure 3 is a structural schematic diagram of a first bracket shown in an embodiment of the present disclosure; Figure 4 is a structural schematic diagram of a second bracket shown in an embodiment of the present disclosure; Figure 5 is a structural schematic diagram of a locking mechanism shown in an embodiment of the present disclosure; Figure 6 is a structural schematic diagram of a pressing block assembly shown in an embodiment of the present disclosure; Figure 7 is a structural schematic diagram of another pressing block assembly shown in an embodiment of the present disclosure; Figure 8 is a schematic cross-sectional structure diagram of a pressing block assembly shown in an embodiment of the present disclosure; Fig. 9 It is a schematic structural diagram of a pressing block and a welding part shown in an embodiment of the present disclosure.

[0023] Legend: 1. Bottom positioning fixture, 11. Bottom plate, 12. Positioning pin; 2. Support; 3. Clamping assembly, 30. Through hole; 31. pressing plate, 310. stepped hole, 310a. step structure; 32. a pressing block assembly, 321. an elastic member, 322. a pressing block, 3221. a fixing block, 3222. a pressing block body, 3222a. a first pressing plate, 3222b. a second pressing plate, 3223. an adjusting gasket; 33. Bolts; 34. Nut; 4. Lifting cylinder mechanism; 41. a first bracket, 411. a first rod, 412. a second rod, 413. a connecting member; 42, a second bracket, 421, a first plate, 422, a second plate, 423, a third plate, 424, a fourth plate; 43. Lifting cylinder; 5. Locking mechanism; 51. Pillar; 52, driving member, 521, rotating cylinder, 522, rotating shaft; 53. Locking block.

[0024] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0026] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with ordinary skills in the field to which the present disclosure belongs. The words "first", "second", "third" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limit, but indicate that there is at least one. Words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" include the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] With the continuous development of domestic automobiles, automobile manufacturing technology is changing with each passing day. In order to improve market competitiveness, the vehicle uses a seat crossbeam formed of high-strength hydraulic pipes, which greatly improves the body rigidity, thereby improving driving control and safety. At the same time, the connection between the one-piece hydraulic pipe and the front floor panel has become a problem. Considering the welding feasibility and quality stability, laser welding is used for connection.

[0028] Laser welding has the advantages of small heat impact, small welding deformation, and high welding efficiency. However, since laser welding is very sensitive to the overlap gap, the overlap gap is generally required to be ≤0.3mm. The hydraulic pipe material is too hard, and the panel and the hydraulic pipe are connected on a large plane. The overlap gap needs to be strictly controlled during welding. Among them, the length of the high-strength hydraulic pipe is close to 1500mm, and the number of laser welding passes reaches 47. If the overlap gap between the hydraulic pipe and the front floor panel is large, it will make it difficult to weld the hydraulic pipe and the front floor panel together.

[0029] Therefore, how to ensure that the hydraulic pipe and the front floor panel always maintain a small overlap gap during the welding process is a key issue that needs to be solved.

[0030] The present disclosure provides a welding tool, such as Figure 1 and Figure 2 As shown, the welding tooling includes a bottom positioning fixture 1, a support 2, a clamping assembly 3 and a lifting cylinder mechanism 4. One end of the support 2 is fixed to the bottom positioning fixture 1, and the other end is rotatably connected to the clamping assembly 3. The two ends of the lifting cylinder mechanism 4 are respectively connected to the bottom positioning fixture 1 and the clamping assembly 3, and the clamping assembly 3 has a through hole 30, which is opposite to the weld bead of the welded part. The lifting cylinder mechanism 4 is used to drive the clamping assembly 3 to rotate relative to the support 2, wherein the bottom positioning fixture 1 is used to fix the welded part.

[0031] The welding tool has a clamping state and an opening state. In the clamping state, the lifting cylinder mechanism 4 contracts, and the clamping assembly 3 abuts against the top of the weldment. In the opening state, the lifting cylinder mechanism 4 extends, and the clamping assembly 3 separates from the top of the weldment.

[0032] Among them, at least a first welding part and a second welding part are placed between the bottom positioning fixture 1 and the clamping assembly 3, and the second welding part is located between the first welding part and the clamping assembly 3. The second welding part has a weld bead, and the weld bead is opposite to the through hole 30. Then a welding tool (such as a welding gun, a spot welder, etc.) is used to emit a light beam to the weld bead, and the light beam passes through the weld bead into the overlap of the first welding part and the second welding part, and then the welding of the first welding part and the second welding part is completed. The bottom positioning fixture 1 includes components such as a bottom plate 11 and a positioning pin 12. The positioning pin 12 is fixed to the bottom plate 11. The bottom plate 11 is used to support the welding part, and the positioning pin 12 is used to realize the positioning of the welding part, so as to avoid the welding part from being offset during the welding process.

[0033] The technical solution provided by the embodiment of the present disclosure is that before welding, a weldment is first placed on the bottom positioning fixture 1, and then another weldment is placed on the weldment. After the weldment is positioned on the bottom positioning fixture 1, the lifting cylinder mechanism 4 contracts so that the clamping assembly 3 clamps the weldment. In this way, a small overlap gap is ensured between the two weldments, so that the welding process proceeds smoothly. After the welding is completed, the lifting cylinder mechanism 4 is extended, and then the welded weldment is taken out of the welding tooling.

[0034] In addition, due to the use of the lifting cylinder mechanism 4, the welding tool can automatically press the welded part, so that the welded part can be quickly stabilized, which is conducive to realizing assembly line batch production.

[0035] Next, the implementation of the lifting cylinder mechanism 4 is exemplarily described.

[0036] In some examples, such as Figure 1 and Figure 2 As shown, the lifting cylinder mechanism 4 includes a first bracket 41, a second bracket 42 and a lifting cylinder 43. One end of the first bracket 41 is fixed to the bottom plate 11 of the bottom positioning fixture 1, and the other end extends along the first direction. The second bracket 42 is fixed to the clamping assembly 3. One end of the lifting cylinder 43 is connected to one end of the first bracket 41 away from the bottom positioning fixture 1, and the other end is connected to the second bracket 42, wherein the first direction is the direction in which the clamping assembly 3 points to the bottom positioning fixture 1.

[0037] The end of the first bracket 41 away from the bottom positioning fixture 1 extends in the first direction, which can make the lifting cylinder 43 have a larger stroke, so that in the open state, there is a larger angle between the clamping assembly 3 and the bottom plate 11 of the bottom positioning fixture 1. In this way, it is convenient to place the weldment.

[0038] In some examples, such as Figure 3 As shown, the first bracket 41 includes a first rod 411, a second rod 412 and a connecting piece 413. The first rod 411 is fixed to the bottom plate 11 of the bottom positioning fixture 1, the second rod 412 is bent with the first rod 411, one end of the second rod 412 away from the first rod 411 extends along the first direction, the connecting piece 413 is connected to the side of the second rod 412 facing the support 2, and the lifting cylinder 43 is hinged to the connecting piece 413. The second rod 412 can be provided to extend the first bracket 41 along the first direction, so that the lifting cylinder 43 has a larger stroke.

[0039] The cylinder body of the lifting cylinder 43 is hinged to the connecting member 413 , and during the extension or contraction of the lifting cylinder 43 , relative rotation occurs between the lifting cylinder 43 and the connecting member 413 .

[0040] In some examples, such as Figure 1 and Figure 2 As shown, one end of the second bracket 42 is fixed to the clamping assembly 3, and the other end extends in a direction away from the bottom positioning fixture 1. Similarly, this can also increase the stroke of the lifting cylinder 43, so that in the open state, there is a larger angle between the clamping assembly 3 and the bottom plate 11 of the bottom positioning fixture 1. In this way, it is convenient to place the welded parts.

[0041] In some examples, such as Figure 4As shown, the second bracket 42 includes a first plate 421, a second plate 422 and a third plate 423 connected in sequence. The first plate 421, the second plate 422 and the third plate 423 are arranged in a bent manner, and the first plate 421 and the third plate 423 extend in opposite directions, and the first plate 421 is fixed to the clamping assembly 3. One end of the second plate 422 away from the first plate 421 extends in a direction away from the bottom positioning fixture 1, and the lifting cylinder 43 is hinged to the third plate 423. The arrangement of the second plate 422 enables the second bracket 42 to extend in a direction away from the bottom positioning fixture 1, thereby increasing the stroke of the lifting cylinder 43.

[0042] The telescopic rod of the lifting cylinder 43 is hinged to the third plate 423 , and during the extension or contraction of the lifting cylinder 43 , relative rotation occurs between the lifting cylinder 43 and the third plate 423 .

[0043] For example, Figure 4 As shown, the second bracket 42 further includes a fourth plate 424, which is fixed to the second plate 422, and the fourth plate 424 and the first plate 421 extend in the same direction. The clamping assembly 3 is fixed between the first plate 421 and the fourth plate 424, and the clamping assembly 3, the first plate 421 and the fourth plate 424 can be fixedly connected by bolts.

[0044] In some examples, such as Figure 1 , Figure 2 and Figure 5 As shown, the welding fixture further includes a locking mechanism 5, which includes a column 51, a driving member 52 and a locking block 53. The column 51 is fixed to the bottom plate 11 of the bottom positioning fixture 1, the driving member 52 is fixed to the column 51, the locking block 53 is connected to the driving member 52, and the driving member 52 is used to drive the locking block 53 to rotate. In the clamped state, the clamping assembly 3 is located between the column 51 and the locking block 53.

[0045] Before placing the weldment on the welding fixture, the locking block 53 is separated from the clamping assembly 3, so that the lifting cylinder 43 can drive the clamping assembly 3 to rise. After placing the weldment on the welding fixture, the lifting cylinder 43 drives the clamping assembly 3 to descend, thereby clamping the weldment. Then the driving member 52 drives the locking block 53 to clamp on the clamping assembly 3, thereby enhancing the degree of clamping of the weldment by the clamping assembly 3. When the weldment is welded, the driving member 52 then drives the locking block 53 to separate from the clamping assembly 3, and then the lifting cylinder 43 drives the clamping assembly 3 to rise, so as to facilitate the removal of the weldment.

[0046] In some examples, such as Figure 5As shown, the driving member 52 includes a rotating cylinder 521 and a rotating shaft 522. The locking block 53 is connected to the rotating shaft 522. When the rotating cylinder 521 is working, the rotating shaft 522 drives the locking block 53 to rotate. After the weldment is placed on the welding fixture and the clamping assembly 3 clamps the weldment, the rotating cylinder 521 drives the rotating shaft 522 to rotate. Thereby, the locking block 53 is driven to rotate in a direction close to the clamping assembly 3, so that the locking block 53 clamps the clamping assembly 3.

[0047] When the welding of the welded part is completed, the rotating cylinder 521 drives the rotating shaft 522 to rotate, thereby driving the locking block 53 to rotate in a direction away from the clamping assembly 3, so that the locking block 53 is separated from the clamping assembly 3. Then the lifting cylinder 43 drives the clamping assembly 3 to rise, so as to facilitate the removal of the welded part from the welding tool.

[0048] In some examples, such as Figure 1 , Figure 2 and Figure 6 As shown, the clamping assembly 3 includes a clamping plate 31 and a clamping block assembly 32. The clamping plate 31 is rotatably connected to the support 2, and the clamping block assembly 32 is fixed to the side of the clamping plate 31 facing the bottom positioning fixture 1. The clamping block assembly 32 is used to clamp the weldment, and the clamping block assembly 32 can avoid the overlap gap of the weldment. It can be understood that the through hole 30 is located in the clamping plate 31.

[0049] Among them, the pressing block assembly 32 includes an elastic member 321 and a pressing block 322, and the two ends of the elastic member 321 are respectively connected to the clamping plate 31 and the pressing block 322. The elastic member 321 can make the pressing block 322 counteract the welding part. If there is a gap between the pressing block 322 and the welding part due to manufacturing tolerance of the welding part or the welding tooling, the existence of the elastic member 321 can absorb the gap, thereby strengthening the degree of compression of the welding part, thereby ensuring the welding quality of the welding part. Alternatively, when the thickness of a certain part of the welding part is large, the welding part can push the elastic member 321 to be compressed through the pressing block 322, so that the elastic member 321 absorbs the excess thickness of the welding part, thereby ensuring that the locking block 53 can smoothly compress the clamping assembly 3. Thereby ensuring that there is a small overlap gap between two adjacent welding parts.

[0050] It can be understood that the elastic member 321 is always in a compressed state.

[0051] In some examples, such as Figure 6-Figure 8As shown, the elastic member 321 is a spring. The clamping assembly 3 also includes a bolt 33 and a nut 34. The clamping plate 31 is located between the nut 34 and the elastic member 321. The clamping plate 31 has a stepped hole 310. The bolt 33 passes through the stepped hole 310 and is connected to the nut 34. One end of the bolt 33 away from the nut 34 is slidably connected to the pressing block 322. The elastic member 321 is encircled by the bolt 33. The two ends of the elastic member 321 are respectively against the step structure 310a of the stepped hole 310 and the pressing block 322.

[0052] In the clamped state, when the weldment and the pressing block 322 are against each other, the weldment can push the pressing block 322 and the bolt 33 to slide relative to each other, so that the compression amount of the elastic member 321 can be adjusted. The pressing block 322 has a sliding hole, and the head of the bolt 33 passes through the sliding hole, so that the bolt 33 and the pressing block 322 are slidably connected. If the distance between the weldment and the clamping plate 31 is large, the spring pushes the pressing block 322, and the compression amount of the spring becomes smaller, so that the pressing block 322 presses the weldment. If the distance between the weldment and the clamping plate 31 is small, the pressing block 322 squeezes the spring, so that the compression amount of the spring becomes larger.

[0053] Of course, in other examples, the elastic member 321 may also be a rubber block, etc., which is not specifically limited in the embodiments of the present disclosure.

[0054] In some examples, such as Figure 6-Figure 8 As shown, the pressing block 322 includes a fixing block 3221 and a pressing block body 3222. The pressing block body 3222 includes a first pressing plate 3222a and a second pressing plate 3222b arranged in a bent manner, the fixing block 3221 is located between the elastic member 321 and the first pressing plate 3222a, and the fixing block 3221 is slidably connected to the bolt 33.

[0055] In some examples, such as Figure 6 As shown, the pressing block 322 may include a fixing block 3221 and a pressing block body 3222 .

[0056] In other examples, such as Figure 8 As shown, the pressing block 322 may also include a fixing block 3221 and two pressing block bodies 3222. The two first pressing plates 3222a extend in a direction away from each other at one end thereof away from the second pressing plate 3222b.

[0057] Each weld bead on the weldment ( Fig. 9Both sides of the pressure block 322 (the dotted line in the figure is the weld bead) need to be against the pressure block 322 to ensure the stability of the welded part. When the distance between two adjacent weld bead is large, two pressure block assemblies 32 can be set between the two adjacent weld bead. When the distance between two adjacent weld bead is small, the distance between the two weld bead may not allow two pressure block assemblies 32 to be set. In this way, a pressure block assembly 32 can be set between the two weld bead, and the pressure block 322 of the pressure block assembly 32 includes two pressure block bodies 3222. In this way, the clamping strength of the welded part can be strengthened, and interference between adjacent pressure block assemblies 32 can be avoided.

[0058] In some examples, such as Figure 6-Figure 8 As shown, the pressing block assembly 32 further includes an adjusting washer 3223. The adjusting washer 3223 is located between the fixing block 3221 and the first pressing plate 3222a, and the adjusting washer 3223 is located on one side of the bolt 33, so as to avoid hindering the sliding of the bolt 33. In this way, when the bolt 33 extends from the stepped hole 310, it will not directly abut against the first pressing plate 3222a, so that there is a large relative sliding space between the bolt 33 and the fixing block 3221, which is conducive to adjusting the compression amount of the elastic member 321.

[0059] In some examples, each bolt 33 is threadedly connected to two nuts 34, and the two nuts 34 are both located on the side of the pressing plate 31 facing away from the pressing block 322. In this way, the connection between the locking bolt 33 and the pressing plate 31 is facilitated.

[0060] The working process of the welding tool is exemplified below.

[0061] The first step is to keep the welding tool open.

[0062] In the second step, the first welded part is placed between the clamping plate 31 and the bottom positioning fixture 1, and the second welded part is placed between the first welded part and the clamping plate 31. After the first welded part and the second welded part are positioned on the bottom positioning fixture 1, the lifting cylinder 43 contracts, driving the clamping assembly 3 to clamp the first welded part and the second welded part. At the same time, the weld bead of the second welded part is aligned with the through hole on the clamping plate 31, and then the first welded part and the second welded part are welded.

[0063] In the third step, the rotating cylinder 521 drives the locking block 53 to rotate in a direction away from the pressing plate 31 through the rotating shaft 522, so that the locking block 53 is separated from the pressing plate 31.

[0064] Step 4. The lifting cylinder 43 is extended to rotate the pressing plate 31 in a direction away from the bottom positioning fixture 1, thereby separating the pressing block 322 from the second welding piece.

[0065] Step 5: Take out the welded assembly consisting of the first welded part and the second welded part from the welding tool.

[0066] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A welding tool, characterized in that: The welding tool comprises a bottom positioning fixture (1), a support (2), a clamping assembly (3) and a lifting cylinder mechanism (4); One end of the support (2) is fixed to the bottom positioning fixture (1), and the other end is rotatably connected to the clamping assembly (3); the two ends of the lifting cylinder mechanism (4) are respectively connected to the bottom positioning fixture (1) and the clamping assembly (3); the clamping assembly (3) has a through hole (30), and the through hole (30) is opposite to the weld bead of the welded part; the lifting cylinder mechanism (4) is used to drive the clamping assembly (3) to rotate relative to the support (2), wherein the bottom positioning fixture (1) is used to fix the welded part; The welding tool has a clamping state and an opening state. In the clamping state, the lifting cylinder mechanism (4) contracts and the clamping assembly (3) abuts against the top end of the weldment. In the opening state, the lifting cylinder mechanism (4) extends and the clamping assembly (3) separates from the top end of the weldment.

2. The welding tool according to claim 1, characterized in that: The lifting cylinder mechanism (4) comprises a first bracket (41), a second bracket (42) and a lifting cylinder (43); One end of the first bracket (41) is fixed to the bottom positioning fixture (1), and the other end extends along a first direction; the second bracket (42) is fixed to the clamping assembly (3); one end of the lifting cylinder (43) is connected to an end of the first bracket (41) away from the bottom positioning fixture (1), and the other end is connected to the second bracket (42), wherein the first direction is the direction in which the clamping assembly (3) points to the bottom positioning fixture (1).

3. The welding tool according to claim 2, characterized in that: The first bracket (41) comprises a first rod body (411), a second rod body (412) and a connecting piece (413); The first rod body (411) is fixed to the bottom positioning fixture (1); the second rod body (412) and the first rod body (411) are arranged in a bent manner; one end of the second rod body (412) away from the first rod body (411) extends along the first direction; the connecting piece (413) is connected to a side of the second rod body (412) facing the support (2); and the lifting cylinder (43) is hinged to the connecting piece (413).

4. The welding tool according to claim 2, characterized in that: One end of the second bracket (42) is fixed to the clamping assembly (3), and the other end extends in a direction away from the bottom positioning fixture (1).

5. The welding tool according to claim 4, characterized in that: The second bracket (42) comprises a first plate body (421), a second plate body (422) and a third plate body (423) which are connected in sequence; The first plate body (421), the second plate body (422) and the third plate body (423) are arranged in a bent manner, and the first plate body (421) and the third plate body (423) extend in opposite directions. The first plate body (421) is fixed to the clamping assembly (3), and one end of the second plate body (422) away from the first plate body (421) extends in a direction away from the bottom positioning fixture (1), and the lifting cylinder (43) is hinged to the third plate body (423).

6. The welding tool according to claim 1, characterized in that: The welding tool also includes a locking mechanism (5); The locking mechanism (5) comprises a column (51), a driving member (52) and a locking block (53); the column (51) is fixed to the bottom positioning fixture (1); the driving member (52) is fixed to the column (51); the locking block (53) and the driving member (52) are transmission-connected; the driving member (52) is used to drive the locking block (53) to rotate; in the clamping state, the clamping assembly (3) is located between the column (51) and the locking block (53).

7. The welding tool according to claim 6, characterized in that: The driving member (52) comprises a rotating cylinder (521) and a rotating shaft (522); The locking block (53) is connected to the rotating shaft (522); when the rotating cylinder (521) is working, the rotating shaft (522) drives the locking block (53) to rotate.

8. The welding tool according to claim 1, characterized in that: The clamping assembly (3) comprises a clamping plate (31) and a clamping block assembly (32); the clamping plate (31) is rotatably connected to the support (2); and the clamping block assembly (32) is fixed to a side of the clamping plate (31) facing the bottom positioning fixture (1); The pressing block assembly (32) comprises an elastic member (321) and a pressing block (322), and two ends of the elastic member (321) are respectively connected to the pressing plate (31) and the pressing block (322).

9. The welding tool according to claim 8, characterized in that: The elastic member (321) is a spring; The clamping assembly (3) further comprises a bolt (33) and a nut (34); the clamping plate (31) is located between the nut (34) and the elastic member (321); the clamping plate (31) has a stepped hole (310); the bolt (33) passes through the stepped hole (310) and is connected to the nut (34); one end of the bolt (33) away from the nut (34) is slidably connected to the pressure block (322); the elastic member (321) is sleeved around the bolt (33); and two ends of the elastic member (321) are respectively abutted against the step structure (310a) of the stepped hole (310) and the pressure block (322).

10. The welding tool according to claim 9, characterized in that: The pressing block (322) comprises a fixing block (3221) and a pressing block body (3222); The pressing block body (3222) comprises a first pressing plate (3222a) and a second pressing plate (3222b) arranged in a bent manner, the fixing block (3221) is located between the elastic member (321) and the first pressing plate (3222a), and the fixing block (3221) is slidably connected to the bolt (33).

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