A dual station robot welding apparatus

Abstract

The utility model provides a kind of double-station mechanical hand welding device, it is related to welding technical field, including rotary base, the upper of rotary base is equipped with double-station processing platform, the middle part of double-station processing platform is equipped with separating mechanism, double-station processing platform is detachably connected with the positioning tool for positioning the oil tank cover plate to be processed, and the rear end of rotary base is provided with welding mechanical hand.The positioning tool includes positioning plate, positioning convex column, support column, separating plate and rotating table are equipped on positioning plate, quick clamp is detachably connected on the top of rotating table, the side surface of positioning plate is connected with limiting post, limiting square tube, L-shaped limiting plate and limiting bolt are equipped on the limiting post.The utility model is provided with double-station processing platform and rotary base, and production efficiency is significantly improved;the positioning tool solves the problem that forklift oil tank cover plate is difficult to position due to complex structure, ensures welding accuracy;cooperates with protection plate and protection device, and improves operation safety.

Description

Technical Field

[0001] This utility model mainly relates to the field of welding technology, specifically to a dual-station robotic welding device. Background Technology

[0002] Forklift fuel tank covers are typically welded together from plate-shaped components and multiple pipes. There are numerous welding points, and the welds connecting the pipes to the plate are often circumferential or curved, requiring high precision, sealing, and consistency in welding. Currently, welding of these fuel tank covers is mainly done manually or using a single-station robotic arm.

[0003] In manual welding, operators must use a welding torch to weld the plate-like components of the cover plate to each pipe connection one by one. Due to the varying locations of the pipes, the complex welding paths, and the need for continuous and uniform welds, manual welding is labor-intensive and inefficient. Furthermore, the quality stability of manual welding is greatly affected by subjective factors such as the operator's skill level and working condition, easily leading to defects such as incomplete welds and porosity, making it difficult to guarantee product consistency and yield.

[0004] Currently, robotic arms are also used for welding. For example, Chinese invention patent ZL201910863100.X discloses an automatic welding system for automotive mufflers. This system uses a rotatable welding platform divided into two clamping areas, each with a first and second clamping mechanism. It first clamps and welds some pipe components to form a reference frame, then clamps the remaining pipe components to complete the overall welding. This solution improves welding quality and equipment utilization to some extent, but it is primarily designed for the complex structure of automotive mufflers with multiple overlapping muffler pipes. The numerous clamping mechanisms and cumbersome operation steps require two clamping and two welding operations to complete a single workpiece, making it unsuitable for structures like forklift fuel tank covers, which are mainly composed of plate-like components and a small number of pipes. Furthermore, the system can only fix one workpiece at a time in a single-sided workstation, resulting in low work efficiency. Additionally, the horizontal clamping method makes it unsuitable for vertical forklift fuel tank cover welding operations.

[0005] For example, utility model patent ZL202420005068.8 discloses a dual-station oil cup welding workstation. It achieves alternating welding of two oil cups by setting up a dual-station rotary welding fixture, and uses a fence to isolate the operator from the welding robot, improving welding efficiency and safety. However, this workstation is mainly for laser welding of oil cup-type containers. Its welding fixture uses a combination of side clamping components, internal support mechanisms, rear clamping components, and downward pressing components, specifically designed to fix the specific shape of the oil cup. For irregularly shaped structural parts such as forklift fuel tank covers with bends, support plates, and complex pipelines, this fixture cannot provide effective positioning and clamping, especially for precisely constraining the bends at the bottom of the cover and the laterally protruding pipes. Furthermore, the welding fixture of this workstation is fixedly installed on the dual-station platform, making it impossible to adjust its position or quickly replace it according to changes in workpiece specifications, resulting in poor versatility.

[0006] Therefore, there is an urgent need for a dual-station welding device that can be applied to irregularly shaped structural parts such as forklift fuel tank covers, can achieve parallel clamping and welding operations, and has high positioning accuracy and good versatility. Utility Model Content

[0007] 1. The technical problem to be solved by the utility model:

[0008] This invention provides a dual-station robotic welding device to solve the technical problems existing in the background art.

[0009] 2. Technical Solution:

[0010] To achieve the above objectives, the technical solution provided by this utility model is as follows: a dual-station robotic welding device, including a rotary base, a dual-station processing table above the rotary base, the dual-station processing table being detachably connected to the rotary base, a partition mechanism being provided in the middle of the dual-station processing table, a positioning fixture for positioning the oil tank cover to be processed being detachably connected to the dual-station processing table, and a welding robotic arm being provided at the rear end of the rotary base.

[0011] Furthermore, the dual-station processing table has a first connecting hole arranged in a rectangular array, and the corresponding position of the positioning fixture has a second connecting hole. The second connecting hole and the first connecting hole are detachably connected by bolts.

[0012] Furthermore, the positioning fixture includes a positioning plate with a second connecting hole. The top of the positioning plate has two partition plates for supporting the two bent pipe positions at the bottom of the fuel tank cover. The top of the positioning plate also has a positioning protrusion and a support column. The positioning protrusion is adapted to the positioning hole on the fuel tank cover, and the support column is used to support the bottom of the support plate of the fuel tank cover. A rotating platform is provided at a diagonal position of the positioning plate, and a quick clamp is detachably connected to the top of the rotating platform.

[0013] Furthermore, the rotary table includes a support base, and a positioning frustum is rotatably connected to the top of the support base via a bearing. The top of the positioning frustum is detachably connected to the quick clamp.

[0014] The positioning plate has a limiting post connected to its side, and a limiting square tube connected to the top side of the limiting post. A first limiting space is vertically set on the limiting square tube. A first L-shaped limiting plate is connected to one side of the first limiting space. A locking hole is opened on the side of the limiting square tube, and a first limiting pin is threaded into the locking hole.

[0015] A second L-shaped limiting plate is also connected to the front side of the first limiting space. The top of the second L-shaped limiting plate is connected to a second limiting pin by a locking ring thread. A limiting area for limiting the oil tank cover pipe is formed between the first L-shaped limiting plate and the second L-shaped limiting plate. The first limiting pin and the second limiting pin are respectively positioned by threaded locking.

[0016] Furthermore, protective devices are detachably connected to both sides of the dual-station processing table. The protective devices include arc-shaped protective railings, with two fixed posts symmetrically connected to the inner side of the arc-shaped protective railings. An installation plate is connected to the end of the fixed post away from the arc-shaped protective railing, and the installation plate is detachably connected to the side of the dual-station processing table by bolts.

[0017] Furthermore, the separating mechanism includes a concave separating frame, the inner side of which has a concave slot, and a protective plate is engaged in the concave slot.

[0018] Furthermore, the protective plate is made of metal or high-temperature glass.

[0019] Furthermore, the rotating base is a rotating worktable, and the rotating worktable rotates 180 degrees each time.

[0020] Furthermore, the protective plate is located in the middle of the dual-station processing table, and is used to divide the dual-station processing table into two independent processing areas.

[0021] 3. Beneficial effects:

[0022] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0023] This utility model is rationally designed, enabling parallel operation of loading / unloading and welding by setting up a rotating base and a dual-station processing table. While the operator is installing and positioning the oil tank cover at one station, the welding robot can simultaneously weld the workpiece at the other station, eliminating the time wasted waiting for clamping in traditional single-station operations and significantly improving equipment utilization and batch production efficiency.

[0024] To address the challenges of complex structure and difficult positioning of forklift fuel tank covers, this solution incorporates a specialized positioning fixture. Rapid initial positioning is achieved through the engagement of positioning protrusions and positioning holes. A partition plate supports the bottom bend, and multiple support columns provide stable support for the bottom of the support plate. Combined with an adjustable-angle quick-clamping device on the rotating platform, reliable clamping of irregularly shaped components is achieved. L-shaped limiting plates and limiting pins on the limiting columns further precisely lock the pipe, effectively preventing displacement during welding and ensuring welding accuracy and product consistency.

[0025] In addition, the protective plate in the middle of the dual-station processing table is made of metal or high-temperature glass, which effectively isolates welding spatter and arc light, protecting the operator's safety, and also facilitates observation of the operation at the other station. The protective devices on both sides of the processing table further enhance the safety of the equipment during operation, making the entire welding process more efficient, stable, and safe.

[0026] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the positioning fixture clamping the processing component of this utility model.

[0029] Figure 3 This is a schematic diagram of the positioning tooling structure of this utility model.

[0030] Figure label:

[0031] 1. Rotary base; 2. Dual-station processing table; 21. First connecting hole; 3. Separating mechanism; 31. Concave separator; 32. Concave slot; 33. Protective plate; 4. Positioning fixture; 41. Second connecting hole; 42. Positioning plate; 421. Limiting post; 422. Limiting square tube; 423. First limiting space; 424. First L-shaped limiting plate; 425. First limiting pin; 426. Second L-shaped limiting plate; 427. Second limiting pin; 43. Separating plate; 44. Positioning protrusion; 45. Supporting post; 46. Positioning hole; 47. Rotary table; 471. Supporting base; 472. Positioning frustum; 48. Quick clamp; 5. Welding robot; 6. Protective device; 61. Arc-shaped protective railing; 62. Fixed post; 63. Mounting plate. Detailed Implementation

[0032] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0033] In the description of this utility model, all expressions relating to orientation or positional relationships are based on the accompanying drawings and are used only for simplification. They do not indicate or imply that the device or component involved must have a specific orientation or be constructed or operated in a specific orientation, and therefore should not be construed as limiting this utility model. The terms "first" and "second" are used only to distinguish descriptions and do not indicate relative importance or the number of technical features; "multiple" refers to two or more. Unless otherwise expressly specified, the terms "connected," "provided with," etc., should be interpreted broadly, including, for example, fixed connections, detachable connections, integral connections, direct or indirect connections, etc.

[0034] It should be noted that the structures not described in this utility model do not involve the design points and improvement directions of this utility model, and can all adopt existing technologies known to those skilled in the art.

[0035] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0036] See attached document Figure 1-3A dual-station robotic welding device includes a rotary base 1, a dual-station processing table 2 above the rotary base 1, and the dual-station processing table 2 is detachably connected to the rotary base 1. A separating mechanism 3 is provided in the middle of the dual-station processing table 2, and a positioning fixture 4 for positioning an oil tank cover to be processed is detachably connected to the dual-station processing table 2. A welding robotic arm 5 is provided at the rear end of the rotary base 1. In this specific embodiment, the rotary base 1 adopts a rotary worktable as used in the prior art. The rotary worktable rotates 180 degrees each time to realize the alternating switching between the two workstations. The welding robotic arm 5 adopts the prior art, including a multi-degree-of-freedom robotic arm and a welding device disposed at the end of the robotic arm. Related supporting facilities, such as a welding machine, wire feeding mechanism, and control system, are also provided on the side of the welding robotic arm 5. These supporting facilities are not shown in the accompanying drawings, but their specific structure and connection method are known to those skilled in the art.

[0037] The dual-station processing table 2 has first connecting holes 21 arranged in a rectangular array, and corresponding second connecting holes 41 are provided at the positions of the positioning fixture 4. The second connecting holes 41 are detachably connected to the first connecting holes 21 by bolts. Through this array of connecting holes, the installation position of the positioning fixture 4 can be flexibly adjusted according to different specifications of oil tank cover plates, improving the versatility of the device, and multiple positioning fixtures 4 can be set at one time.

[0038] The positioning fixture 4 includes a positioning plate 42 with the second connecting hole 41. Two partition plates 43 are located on the top of the positioning plate 42 and are vertically arranged to support and limit the two curved pipes at the bottom of the fuel tank cover. The top of the positioning plate 42 also has positioning protrusions 44 and support columns 45. The positioning protrusions 44 are adapted to the positioning holes 46 on the fuel tank cover for precise positioning of the fuel tank cover. The support columns 45 support the bottom of the support plate of the fuel tank cover. Multiple support columns 45 are arranged on the positioning plate 42. A rotating platform 47 is located diagonally on the positioning plate 42. A quick clamp 48 is detachably connected to the top of the rotating platform 47 for quickly clamping and fixing the fuel tank cover after positioning.

[0039] The rotary table 47 includes a support base 471, and a positioning frustum 472 is rotatably connected to the top of the support base 471 via bearings. A quick clamp 48 is detachably connected to the top of the positioning frustum 472. Through the bearing connection structure, the positioning frustum 472 can rotate freely relative to the support base 471, thereby allowing the angle of the quick clamp 48 to be adjusted as needed when installing the fuel tank cover, facilitating clamping operations for the operator.

[0040] The positioning plate 42 has a limiting post 421 connected to its side, and a limiting square tube 422 connected to the top side of the limiting post 421. A vertically oriented first limiting space 423 is provided on the limiting square tube 422, and a first L-shaped limiting plate 424 is connected to one side of the first limiting space 423. A locking hole is provided on the side of the limiting square tube 422, and a first limiting pin 425 is threaded into the locking hole. A second L-shaped limiting plate 426 is also connected to the side of the limiting square tube 422, and a second limiting pin 427 is threaded into the top of the second L-shaped limiting plate 426 via a locking ring. The first L-shaped limiting plate 424 and the second L-shaped limiting plate 426 form a limiting area for limiting the pipeline of the oil tank cover. The first limiting pin 425 and the second limiting pin 427 are respectively positioned by threaded locking. This structure can precisely constrain the direction and position of the pipeline connected to the oil tank cover, preventing pipeline displacement during welding and ensuring welding accuracy.

[0041] The dual-station processing table 2 is detachably connected to both sides with protective devices 6. Each protective device 6 includes an arc-shaped protective railing 61. Two fixed posts 62 are symmetrically connected to the inner side of the arc-shaped protective railing 61. A mounting plate 63 is connected to the end of each fixed post 62 away from the arc-shaped protective railing 61. The mounting plate 63 is detachably connected to the side of the dual-station processing table 2 by bolts. This protective device 6 provides safety protection during operation.

[0042] The separating mechanism 3 includes a concave separating frame 31, with a concave slot 32 on the inner side of the frame 31, into which a protective plate 33 is engaged. The protective plate 33 is located in the middle of the dual-station processing table 2, dividing it into two independent processing areas. The protective plate 33 can be made of metal or high-temperature glass. A rigid metal plate has high structural strength and can effectively block welding spatter; a high-temperature glass plate provides physical isolation while allowing operators to observe the work at the other station.

[0043] During operation, the operator first places the forklift fuel tank cover to be welded onto the positioning fixture 4 at one of the workstations. Initial positioning is achieved through the engagement of the positioning protrusion 44 and the positioning hole 46. The curved pipe at the bottom of the fuel tank cover is supported by two partition plates 43, and the bottom of the support plate is supported by a support column 45. The operator then rotates the positioning frustum 472 on the rotary table 47, adjusts the quick clamp 48 to a suitable angle, and presses down the quick clamp 48 to clamp and fix the fuel tank cover. For the pipe on the fuel tank cover, it is placed within the limiting area between the first L-shaped limiting plate 424 and the second L-shaped limiting plate 426. The first limiting pin 425 and the second limiting pin 427 are tightened respectively, precisely locking the pipe in the predetermined position. After positioning and clamping, the operator starts the rotary base 1, which rotates the dual-station processing table 2 180 degrees, moving the workstation to the working area of ​​the welding robot arm. The welding robotic arm automatically welds the plate-shaped components of the fuel tank cover to the connections of various pipes according to a preset program. Simultaneously, the operator can install and position the next fuel tank cover at another workstation, enabling parallel loading / unloading and welding operations. After welding at the current workstation is completed, the rotating base 1 rotates 180 degrees again, transferring the welded workpiece to the operator's side. The operator then unloads the welded fuel tank cover and re-clamps the workpiece to be processed. This cyclical operation significantly improves production efficiency. The protective plate 33 effectively isolates the two workstations, preventing welding spatter from injuring the operator and avoiding the impact of welding arc light on the operation at the other workstation. The protective device 6 provides safety protection on both sides of the dual-station processing table 2, ensuring operational safety during equipment operation.

[0044] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A dual-station robotic welding device, characterized in that: Includes a rotary base (1), a dual-station processing table (2) is provided above the rotary base (1), the dual-station processing table (2) is detachably connected to the rotary base (1), a separation mechanism (3) is provided in the middle of the dual-station processing table (2), a positioning fixture (4) for positioning the oil tank cover plate to be processed is detachably connected to the dual-station processing table (2), and a welding robot (5) is provided at the rear end of the rotary base (1). The positioning fixture (4) includes a positioning plate (42), on which a second connecting hole (41) is provided. The top of the positioning plate (42) is provided with two partition plates (43), which are used to support the two bent pipe positions at the bottom of the oil tank cover. The top of the positioning plate (42) is also provided with a positioning protrusion (44) and a support column (45). The positioning protrusion (44) is adapted to the positioning hole (46) on the oil tank cover. The support column (45) is used to support the bottom of the support plate of the oil tank cover. A rotating table (47) is provided at the diagonal position of the positioning plate (42). A quick clamp (48) is detachably connected to the top of the rotating table (47).

2. The dual-station robotic welding device according to claim 1, characterized in that: The dual-station processing table (2) has a first connecting hole (21) arranged in a rectangular array, and the second connecting hole (41) is detachably connected to the first connecting hole (21) by bolts.

3. The dual-station robotic welding device according to claim 1, characterized in that: The rotary table (47) includes a support base (471), and a positioning platform (472) is rotatably connected to the top of the support base (471) via a bearing. The top of the positioning platform (472) is detachably connected to the quick clamp (48).

4. The dual-station robotic welding device according to claim 3, characterized in that: The positioning plate (42) is connected to a limiting post (421) on its side, and a limiting square tube (422) is connected to the top side of the limiting post (421). A first limiting space (423) is vertically arranged on the limiting square tube (422). A first L-shaped limiting plate (424) is connected to one side of the first limiting space (423). A locking hole is provided on the side of the limiting square tube (422), and a first limiting pin (425) is threaded into the locking hole. A second L-shaped limiting plate (426) is also connected to the front side of the first limiting space (423). The top of the second L-shaped limiting plate (426) is connected to a second limiting pin (427) by a locking ring thread. A limiting area for limiting the oil tank cover pipe is formed between the first L-shaped limiting plate (424) and the second L-shaped limiting plate (426). The first limiting pin (425) and the second limiting pin (427) are respectively positioned by thread locking.

5. The dual-station robotic welding device according to claim 1, characterized in that: The dual-station processing table (2) is detachably connected to two protective devices (6). The protective devices (6) include an arc-shaped protective railing (61). Two fixed posts (62) are symmetrically connected to the inner side of the arc-shaped protective railing (61). An installation plate (63) is connected to the end of the fixed post (62) away from the arc-shaped protective railing (61). The installation plate (63) is detachably connected to the side of the dual-station processing table (2) by bolts.

6. The dual-station robotic welding device according to claim 1, characterized in that: The separation mechanism (3) includes a concave separation frame (31), and a concave slot (32) is opened on the inner side of the concave separation frame (31), and a protective plate (33) is snapped into the concave slot (32).

7. A dual-station robotic welding device according to claim 6, characterized in that: The protective plate (33) is made of metal or high-temperature glass.

8. The dual-station robotic welding device according to claim 1, characterized in that: The rotating base (1) is a rotating worktable, and the rotating worktable rotates 180 degrees each time.

9. A dual-station robotic welding device according to claim 6, characterized in that: The protective plate (33) is located in the middle of the dual-station processing table (2) and is used to divide the dual-station processing table (2) into two independent processing areas.

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