A positioning convenient fillet welding trolley

Abstract

The utility model relates to a corner welding trolley convenient to position, include: car body, four connecting rod mechanism is by first connecting rod, second connecting rod, third connecting rod and fourth connecting rod head and tail hinged and constitutes parallelogram structure, one end of first connecting rod is arranged in car body, the middle split pole is rotatively connected in the hinged place of first connecting rod and second connecting rod, the middle split pole is slidably provided with the sliding sleeve, the sliding sleeve is connected with the hinged point of third connecting rod and fourth connecting rod, so that when first connecting rod and second connecting rod relatively rotate, the middle split pole always is located on the angle bisector of the angle of two, welding torch is set up on the middle split pole, the utility model discloses a parallelogram mechanism and the structure of middle split pole and sliding sleeve by four connecting rods, realize the quick, accurate positioning of welding torch space pose.

Description

Technical Field

[0001] This utility model relates to the field of welding trolley technology, and in particular to a fillet welding trolley that is easy to position. Background Technology

[0002] Fillet welding is a common welding method for joining metal components to form specific spatial angles, and it has wide applications in industries such as shipbuilding, steel structure construction, heavy machinery, and pressure vessels. Trackless magnetic fillet welding trolleys are key equipment for performing this task. They can move flexibly on the workpiece surface using magnetic adsorption and are typically equipped with a multi-degree-of-freedom spatial adjustment mechanism for the welding torch to meet different welding posture requirements.

[0003] In actual welding operations, to ensure that the heat of the electric arc and the molten welding material are evenly distributed on both sides of the base material to obtain good penetration and weld morphology, it is usually necessary to adjust the end of the welding torch to the direction of the theoretical angle bisector of the angle to be welded on the workpiece. This posture is a key prerequisite for ensuring welding quality and improving process consistency, regardless of whether the angle is a right angle, an acute angle, or an obtuse angle.

[0004] However, the existing fillet welding carriages rely entirely on manual operation and visual judgment for torch angle adjustment. Operators must repeatedly adjust the deflection and tilt angles of the welding torch based on the specific angle of the workpiece, relying on personal experience, to try and approximate the angle bisector. This process is not only tedious and time-consuming, but also demands a high level of technical skill and spatial judgment from the operator. Especially when facing non-standard angles or complex workpiece structures that obstruct the line of sight, quickly and accurately locating the angle bisector becomes extremely difficult, resulting in low debugging efficiency and difficulty in ensuring process repeatability for different workpieces and batches. Utility Model Content

[0005] To address the problem of inconvenient initial positioning of the welding torch in existing technologies, this invention provides a convenient fillet welding carriage that can adapt to different workpiece angles and quickly and accurately adjust the welding torch axis to the bisector of any angle, thereby significantly improving the preparation efficiency and consistency of welding operation quality.

[0006] The technical solution is as follows: a corner welding trolley with convenient positioning, comprising: a trolley body; a four-bar linkage, consisting of a first link, a second link, a third link, and a fourth link hinged end to end to form a parallelogram structure, one end of the first link being disposed on the trolley body; a center link, one end of which is rotatably connected to the hinge point between the first link and the second link, a sliding sleeve being slidably disposed on the center link, the sliding sleeve being connected to the hinge point between the third link and the fourth link, such that when the first link and the second link rotate relative to each other, the center link is always located on the angle bisector of the angle between them; and a welding torch disposed on the center link.

[0007] As a further preferred embodiment, the welding torch is fixedly mounted on the centering rod by a welding torch clamp; the welding torch clamp includes a sliding base slidably sleeved on the centering rod, and a clamping seat hinged to the sliding base and capable of locking the angle, and the welding torch is fixed on the clamping seat.

[0008] As a further preferred embodiment, a locking structure for locking the included angle between any two adjacent links of the four-bar linkage is provided.

[0009] As a further preferred embodiment, the locking structure is disposed between the first link and the second link, or between the third link and the fourth link.

[0010] As a further preferred embodiment, the locking structure includes an arc-shaped plate, which is fixed to the first of two adjacent connecting rods and has an arc-shaped groove centered on the hinge point of the two adjacent connecting rods; the second of the two adjacent connecting rods is provided with a locking bolt that can extend into the arc-shaped groove and lock the relative positions of the two rods.

[0011] As a further preferred embodiment, the arc plate is provided with angle scale markings along the arc groove.

[0012] As a further preferred embodiment, the first connecting rod is connected to the vehicle body via a displacement adjustment mechanism; the displacement adjustment mechanism includes a guide rail fixed to the vehicle body, a slider that slides with the guide rail, and a locking member for locking the slider on the guide rail, with the end of the first connecting rod disposed on the slider.

[0013] Compared with the prior art, the present invention has the following advantages: 1. This utility model achieves rapid and precise positioning of the welding torch in space through a parallelogram mechanism composed of four links, a center rod, and a sliding sleeve. Regardless of the actual included angle of the workpiece to be welded, the operator only needs to place the first and second measuring arms against the two sides of the workpiece to ensure that the welding torch is always on the bisector of the angle between the two arms. This significantly reduces the preparation time before welding, reduces the dependence on the operator's technical experience, and thus greatly improves welding efficiency and process quality.

[0014] 2. This utility model provides the welding torch with two additional degrees of freedom for adjustment by setting up a welding torch clamp with a sliding base and a lockable angle clamp. The height of the welding torch and its angle relative to the angle bisector can be further fine-tuned, enhancing the equipment's adaptability to complex welding conditions.

[0015] 3. This utility model can quickly fix the shape of the entire parallelogram mechanism through the locking structure, thereby firmly locking the welding gun angle.

[0016] 4. By setting angle scale markings on the arc plate, this utility model provides operators with an intuitive visual reference, making the adjustment and locking of the angle quantifiable. This not only facilitates the recording and reproduction of the welding angle of a specific workpiece, but also reduces the reliance on the operator's experience and improves the accuracy and efficiency of debugging.

[0017] 5. This utility model connects the vehicle body and the four-bar linkage by setting a displacement adjustment mechanism, realizing fine adjustment of the horizontal distance between the welding torch and the weld. This allows the device to adapt to different plate thicknesses or different welding specifications, expanding the application range of the equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the four-bar linkage, the split rod, and the welding torch of this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the dividing rod and welding gun clamp of this utility model.

[0021] Figure 4 This is a schematic diagram showing the connection relationship between the displacement adjustment mechanism and the four-bar linkage of this utility model.

[0022] Figure 5 This is a schematic diagram illustrating the use of this utility model.

[0023] Figure 6 This is a schematic diagram of the geometric structure of the four-bar linkage and the center link of this utility model.

[0024] The meanings of the reference numerals in the figure are as follows: 1. First connecting rod; 2. Second connecting rod; 3. Third connecting rod; 4. Fourth connecting rod; 5. Vehicle body; 51. Adjustment groove; 52. Abutment wheel; 6. Center split rod; 61. Sliding sleeve; 7. Welding torch; 81. Sliding base; 82. Clamping seat; 91. Arc plate; 92. Arc groove; 93. Locking bolt; 101. Guide rail; 102. Slider; 103. Locking element; 104. Short groove; 12. First pin; 34. Second pin. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1 , 2 and Figure 5 As shown, this utility model provides a corner welding trolley that is easy to position, which includes a trolley body 5, a four-bar linkage, a center split rod 6 and a welding torch 7. The trolley body 5 can travel along a predetermined route. It is equipped with an abutment wheel 52 on the side near the metal component A. The abutment wheel 52 can roll along the surface of the workpiece to detect and track the position of the workpiece, thereby assisting the trolley to travel stably along the weld direction.

[0027] For details, please refer to the following: Figure 2 The four-bar linkage consists of a first link 1, a second link 2, a third link 3, and a fourth link 4, which are hinged end-to-end to form a parallelogram structure. One end of the first link 1 is fixedly mounted on the vehicle body 5. The first link 1 and one end of the second link 2 are connected by a first pin 12, and the angle formed between them corresponds to the actual angle between the two metal components A to be welded. One end of the third link 3 and one end of the fourth link 4 are connected by a second pin 34, forming an angle that is diagonally opposite to the angle formed by the first link 1 and the second link 2. This parallelogram mechanism allows the entire linkage to deform when the first link 1 and the second link 2 rotate relative to each other due to their contact with the workpiece, ensuring that the connecting rod 6 automatically remains in the direction of the angle bisector of the angle between the two components.

[0028] Combination Figure 2 and Figure 6 One end of the center split rod 6 is rotatably mounted on the first pin 12 via a bushing 62, allowing the center split rod 6 to rotate freely around this hinge point. A sliding sleeve 61 is slidably fitted onto the body of the center split rod 6, and this sliding sleeve 61 is fixedly connected to the second pin 34. For example... Figure 6 The parallelogram OABC shown has point O (first pin 12) as the hinge point of the first and second links, and point C (second pin 34) as the hinge point of the third and fourth links. In this geometric relationship, the center bisector 6 corresponds to the diagonal OC. When OA (first link 1) is fixed, and other links are adjusted arbitrarily, the connection between the sliding sleeve 61 and the second pin 34 constrains the movement path of the center bisector 6, ensuring that the direction of the center bisector 6 always points to point O, thus automatically and accurately maintaining its position on the angle bisector. This structural design eliminates the need for repeated manual visual adjustments in traditional methods, achieving rapid and accurate self-positioning of the welding torch angle.

[0029] refer to Figure 3The welding torch 7 is mounted on the centering rod 6 via a welding torch clamp and can move synchronously with the centering rod 6, always aligning with the angle bisector of the angle between the workpiece and the weld torch. The welding torch clamp specifically includes a sliding base 81 and a clamping seat 82. The sliding base 81 is fitted onto the centering rod 6 and can be secured with a screw, allowing for flexible position adjustment of the welding torch along the length of the centering rod 6. The clamping seat 82 is hinged to the sliding base 81 and can be locked at an angle, thus allowing for fine-tuning of the working angle of the welding torch 7, further enhancing its adaptability to different welding process requirements.

[0030] To further lock the welding angle and prevent deformation of the mechanism due to vibration during operation, a locking structure is provided between adjacent links of the four-bar linkage.

[0031] In this embodiment, the locking structure is preferably located between the third link 3 and the fourth link 4. It includes an arc-shaped plate 91 and a locking bolt 93. The arc-shaped plate 91 is fixed to the fourth link 4, and an arc-shaped groove 92 is formed on it with the second pin 34 as its center. The locking bolt 93 is located on the third link 3 and can extend into the arc-shaped groove 92. After the angle is adjusted appropriately, tightening the locking bolt 93 fixes the relative position of the third link 3 and the fourth link 4, thereby locking the shape of the entire parallelogram mechanism and stabilizing the working angle of the welding torch. Furthermore, the arc-shaped plate 91 has angle scale markings 94 along the arc-shaped groove 92, providing operators with an intuitive quantitative reference for angle measurement, facilitating precise adjustment and process recording.

[0032] To optimize the overall adaptability of the equipment and avoid interference with the workpiece, the first connecting rod 1 is connected to the vehicle body 5 via a displacement adjustment mechanism. (Reference) Figure 4 The mechanism includes a guide rail 101 fixed to the vehicle body 5, a slider 102 that slides with the guide rail 101, and a locking member 103 for locking the slider position. The end of the first link 1 is fixed to the slider 102. By loosening the locking member 103, the entire four-bar linkage and welding torch 7 can be pushed to slide along the guide rail 101, thereby adjusting their longitudinal position relative to the vehicle body 5. After adjustment, it can be re-locked. The vehicle body 5 has an adjustment groove 51 adapted to the locking member 103. Through the cooperation of the displacement adjustment mechanism and the adjustment groove 51, after the measurement is completed, the operator can use this mechanism to fine-tune the four-bar linkage and welding torch as a whole in the direction away from the workpiece, ensuring that there is a sufficient safety clearance between the mechanism and the workpiece during the carriage's forward movement to avoid collisions. In addition, a short groove 104 is provided on the slider 102. The short groove 104 is used to connect the locking member 103, and the length of the short groove 104 is the set distance for fine-tuning the four-bar linkage and welding torch as a whole in the direction away from the workpiece.

Claims

1. A fillet welding trolley with convenient positioning, characterized in that, include: Vehicle body (5); The four-bar linkage consists of a first link (1), a second link (2), a third link (3), and a fourth link (4) that are hinged together to form a parallelogram structure. One end of the first link (1) is located on the vehicle body (5). A center rod (6) is rotatably connected at one end to the hinge of the first connecting rod (1) and the second connecting rod (2). A sliding sleeve (61) is slidably provided on the center rod (6). The sliding sleeve (61) is connected to the hinge point of the third connecting rod (3) and the fourth connecting rod (4), so that when the first connecting rod (1) and the second connecting rod (2) rotate relative to each other, the center rod (6) is always located on the angle bisector of the angle between the two. The welding torch (7) is mounted on the center rod (6).

2. The conveniently positioned fillet welding trolley according to claim 1, characterized in that, The welding torch (7) is fixedly mounted on the centering rod (6) by a welding torch clamp; the welding torch clamp includes a sliding base (81) slidably sleeved on the centering rod (6) and a clamping seat (82) hinged to the sliding base (81) and lockable at an angle, and the welding torch (7) is fixed on the clamping seat (82).

3. The conveniently positioned fillet welding trolley according to claim 1 or 2, characterized in that, The four-bar linkage is provided with a locking structure between any two adjacent links for locking the included angle between them.

4. The conveniently positioned fillet welding trolley according to claim 3, characterized in that, The locking structure is disposed between the first link (1) and the second link (2), or between the third link (3) and the fourth link (4).

5. The conveniently positioned fillet welding trolley according to claim 3, characterized in that, The locking structure includes an arc-shaped plate (91), which is fixed to the first of two adjacent connecting rods and has an arc-shaped groove (92) centered on the hinge point of the two adjacent connecting rods. The second of the two adjacent connecting rods is provided with a locking bolt (93) that can extend into the arc-shaped groove (92) and lock the relative positions of the two rods.

6. The conveniently positioned fillet welding trolley according to claim 5, characterized in that, Angle scale markings (94) are provided on the arc plate (91) along the arc groove (92).

7. The conveniently positioned fillet welding trolley according to claim 1, characterized in that, The first connecting rod (1) is connected to the vehicle body (5) through a displacement adjustment mechanism; the displacement adjustment mechanism includes a guide rail (101) fixed on the vehicle body (5), a slider (102) that slides with the guide rail (101), and a locking member (103) for locking the slider (102) on the guide rail (101), and the end of the first connecting rod (1) is disposed on the slider (102).

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