Movable stud welding device

Abstract

The utility model discloses a movable stud welding device which is matched with a grabbing robot to complete stud welding work of a machined part and comprises a fixed support fixedly arranged on a machine frame, an automatic stud welding gun mechanism obliquely and fixedly arranged on the upper portion of the fixed support and a middle beam fixed in the middle of the fixed support. The end of the middle beam is hinged to the middle of the movable support, and a stud grabbing head used for grabbing a stud to be welded is arranged at the end of the automatic stud welding gun mechanism. And a first movement air cylinder and a second movement air cylinder are arranged, an upper supporting rod corresponding to the lower supporting block is fixedly arranged at the lower end of the automatic stud welding gun mechanism, and a limiting structure used for preventing the movable support from further rotating is arranged between the middle beam and the movable support. The stud welding device is simple in structure, stud welding work can be rapidly and conveniently carried out through cooperation with a grabbing robot, and in addition, the structure avoiding requirements of different machined parts are met through the full-open state and the half-open state.

Description

Technical Field

[0001] The utility model relates to the field of automobile stud welding, in particular to a movable stud welding device. Background Art

[0002] At present, when there are multiple studs on a workpiece that need to be welded, in order to prevent the plate from being deformed by force when it is close to the welding gun push rod and causing cold welds, it is necessary to set a lower support block on the opposite side of the stud welding position to prevent deformation. It is necessary to design and install multiple lower support blocks on the stud welding gripper, and the number and position of the lower support blocks correspond to the studs one by one, resulting in increased costs; in addition, too many lower support blocks cause the structure of the stud welding gripper to be complicated, the weight to increase, the load of the grab robot to increase, and the operating efficiency to decrease; furthermore, the stud welding gripper with a complex structure is more likely to interfere with other structures during welding and grasping and releasing parts, increasing the design difficulty; finally, it is impossible to achieve a single set of stud welding equipment for multiple models.

[0003] Therefore, it is urgent to propose a new solution to solve the above problems. Summary of the invention

[0004] The utility model provides a movable stud welding device, which solves the problem in the prior art that a plurality of lower support blocks are designed and installed on a stud welding gripper, resulting in increased cost and design difficulty, and the inability to realize a set of stud welding devices being shared by multiple vehicle models.

[0005] The utility model provides a movable stud welding device, which completes the stud welding work of a workpiece by cooperating with a grabbing robot. The movable stud welding device comprises a fixed bracket, a movable bracket, a lower support block and an automatic stud welding gun mechanism;

[0006] The fixed bracket is fixedly arranged on the frame, the automatic stud welding gun mechanism is tilted and fixedly arranged at the end of the fixed bracket, the fixed bracket includes an intermediate beam horizontally arranged in the middle, the end of the intermediate beam is hingedly arranged in the middle of the movable bracket, and the end of the automatic stud welding gun mechanism is provided with a stud grabbing head for grabbing the stud to be welded;

[0007] A first motion cylinder is fixedly arranged at the lower end of the middle beam, and the end of the piston rod of the first motion cylinder is fixedly arranged at the lower end of the movable bracket;

[0008] An inclined linear guide rail is fixedly connected above the movable bracket, a slider is slidably arranged on the linear guide rail, the lower support block is fixedly arranged on the upper end of the slider, and a second motion cylinder that pushes the slider to slide is arranged at the end of the linear guide rail away from the automatic stud welding gun mechanism;

[0009] An upper support rod corresponding to the lower support block is fixedly arranged at the lower end of the automatic stud welding gun mechanism;

[0010] A limiting structure is provided between the middle beam and the movable bracket to prevent the movable bracket from further rotating relative to the fixed bracket.

[0011] Furthermore, the fixed bracket includes a base fixedly arranged on the frame, a column is fixedly arranged at one end of the base, a horizontally arranged top beam is fixedly arranged at the top of the column, a plurality of first elbow plates are fixedly arranged at the bottom end of the column, the bottom end of a single first elbow plate is fixedly arranged on the base, a first diagonal brace is fixedly arranged between the base and the lower part of the column, and a second diagonal brace is fixedly arranged between the upper part of the column and the top beam.

[0012] Furthermore, a diagonal support plate is fixedly connected obliquely to one side of the top beam close to the lower support block, and the base of the automatic stud welding gun mechanism is fixedly arranged on the diagonal support plate.

[0013] Furthermore, the middle beam is fixedly provided with a first reinforcing rib along the horizontal direction, the movable bracket includes a first movable beam hinged to the fixed bracket and a second movable beam for placing the second movable cylinder, the second movable beam is fixedly obliquely connected to the upper end of the first movable beam, the linear guide rail is fixedly provided on the second movable beam, and the first movable beam is fixedly provided with a second reinforcing rib along the length direction.

[0014] Furthermore, the limiting structure includes a first limiting block arranged at the upper end of the middle beam close to the movable bracket, and a second limiting block fixedly arranged in the middle of the first movable beam, and the second limiting block is provided with a limiting groove for accommodating the first limiting block.

[0015] Furthermore, the middle beam and the column are fixedly connected via an intermediate connecting plate, the end of the first reinforcing rib is fixedly welded to the intermediate connecting plate, and a second toggle plate coplanar with the first reinforcing rib is fixedly provided on the column.

[0016] Furthermore, a lap plate is fixedly provided on the side of the upper end of the middle beam away from the first limit block, and a buffer column is passed through the lap plate to reduce the impact force when the movable bracket and the middle beam collide, and a compression spring is sleeved on the side of the buffer column close to the movable bracket.

[0017] Furthermore, a change joint abutting against the workpiece is provided at the end of the lower support block.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model provides an operating space for placing workpieces by setting a fixed bracket and a movable bracket hinged therewith, thereby conveniently providing a working space for placing workpieces, providing a power for the movable bracket to rotate by setting a first moving cylinder, and moving the slider forward and backward along a linear track by a second moving cylinder so that the workpiece is fitted with the automatic stud welding gun mechanism, and preventing the movable bracket from further rotating by setting a limit structure, and then setting a replacement joint at the end of the lower support block for easy replacement. The entire welding column device only needs to set a single lower support block and an upper support rod matched therewith, and can quickly and conveniently perform stud welding work by cooperating with a grasping robot. In addition, the structural avoidance requirements of different workpieces can be met by the two states of full opening and half opening, and there is no need to install multiple lower support blocks as in the prior art;

[0020] 2. The utility model reduces the impact force when the movable bracket and the middle beam collide with each other by arranging a compression spring, thereby increasing the service life of the entire movable stud welding device;

[0021] 3. The utility model enhances the structural strength of the entire fixing bracket by providing the first reinforcing rib and the second toggle plate coplanar therewith. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the stud welding device of the utility model in the welding state;

[0023] Figure 2 It is a structural schematic diagram of the stud welding device of the utility model in a fully open state;

[0024] Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle;

[0025] Figure 4 for Figure 2 The enlarged schematic diagram of point B in the middle;

[0026] Figure 5 It is a structural schematic diagram of the stud welding device of the utility model in a half-open state;

[0027] Figure 6 This is a schematic diagram of the first movable beam structure of the utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the middle beam of the utility model;

[0029] Figure 8 It is an exploded schematic diagram of the welding structure of the utility model;

[0030] Figure numerals: 1, fixed bracket; 11, base; 12, column; 121, first elbow plate; 122, second elbow plate; 123, middle connecting plate; 13, first diagonal brace; 14, second diagonal brace; 15, middle beam; 151, first reinforcing rib; 152, lap plate; 153, compression spring; 154, first motion cylinder connecting block; 155, buffer column; 16, top beam; 17, diagonal brace plate; 2, limit structure; 21, first Limit block; 22, second limit block; 221, limit groove; 3, linear guide rail; 4, automatic stud welding gun mechanism; 41, stud grabbing head; 42, upper support rod; 5, lower support block; 51, change joint; 6, slider; 7, second moving cylinder; 8, movable bracket; 81, first movable beam; 811, second reinforcement rib; 82, second movable beam; 9, hinged structure; 91, hinge shaft; 92, hinge block; 10, first moving cylinder. DETAILED DESCRIPTION

[0031] In order to further understand the content, features and functions of the utility model, the following embodiments are given, together with the attached Figures 1 to 8 The detailed instructions are as follows.

[0032] like Figures 1 to 8 As shown, this embodiment provides a movable stud welding device, which completes the stud welding work of the workpiece by cooperating with a grabbing robot (not shown in the figure), and the movable stud welding device includes a fixed bracket 1, a movable bracket 8, a lower support block 5 and an automatic stud welding gun mechanism 4. The fixed bracket 1 is fixedly arranged on a frame (not shown in the figure), and the automatic stud welding gun mechanism 4 is tilted and fixedly arranged at the end of the fixed bracket 1, and the two are connected by a diagonal support plate 17. A horizontally arranged middle beam 15 is arranged in the middle of the fixed bracket 1, and the end of the middle beam 15 is hingedly arranged in the middle of the movable bracket 8. The lower end of the middle part of the middle beam 15 is fixedly arranged with a horizontally placed first moving cylinder connecting block 154 by welding, and the first moving cylinder 10 is fixedly arranged on the middle beam 15 through the first moving cylinder 10, and the end of the piston rod of the first moving cylinder 10 is fixedly arranged at the lower end of the movable bracket 8. By moving the piston rod of the first moving cylinder 10 forward and backward, the movable bracket 8 is rotated to the right, thereby providing an operating space for placing the workpiece.

[0033] The movable bracket 8 is fixedly connected with an inclined linear guide 3 by welding, and a slider 6 is slidably arranged on the linear guide 3. A lower support block 5 is fixedly arranged on the upper end of the slider 6. The end of the lower support block 5 is fixedly provided with a change joint 51 that abuts against the workpiece by bolts. The change joint 51 that is easy to disassemble is convenient for timely replacement after wear. The end of the linear guide 3 away from the automatic stud welding gun mechanism 4 is provided with a second moving cylinder 7 that pushes the slider 6 to slide. In this embodiment, an upper electrode is provided on the automatic stud welding gun mechanism 4, and a stud grabbing head 41 for grabbing the stud to be welded is provided at the end of the automatic stud welding gun mechanism 4. In this embodiment, a power unit that provides power to the first moving cylinder 10 and the second moving cylinder 7 is also provided.

[0034] like Figure 1 As shown, in the welding state, the change joint 51 and the stud grabbing head 41 are coaxial, and a lower electrode is arranged on the grabbing robot, and the welding of the stud to be welded is completed by the cooperation of the two electrodes; an upper support rod 42 corresponding to the lower support block 5 is fixedly arranged at the lower end of the automatic stud welding gun mechanism 4, and the fixation of the workpiece is completed by the cooperation of the two.

[0035] In addition, in this embodiment, a limiting structure 2 is provided between the middle beam 15 and the movable bracket 8 for preventing the movable bracket 8 from further rotating relative to the fixed bracket 1 .

[0036] The utility model provides an operating space for placing workpieces by providing a fixed bracket and a movable bracket hingedly connected thereto, thereby conveniently providing a operating space for placing workpieces, provides power for the movable bracket to rotate by providing a first moving cylinder, and moves a sliding block forward and backward along a linear track by a second moving cylinder so that the workpiece is fitted with the automatic stud welding gun mechanism, and prevents the movable bracket from further rotating by providing a limiting structure, and then provides a replacement joint that is easy to replace at the end of the lower support block. The entire welding column device only needs to be provided with a single lower support block and an upper support rod that cooperates with it, and can quickly and conveniently perform stud welding work by cooperating with a grasping robot. In addition, the structural avoidance requirements of different workpieces can be met by the two states of fully open and half open, and there is no need to install multiple lower support blocks as in the prior art.

[0037] In this embodiment, Figure 1 , 2 5 are schematic diagrams of the structure of the stud welding device in the welding state, the fully open state and the half-open state, respectively. If the size of the workpiece is large, it is necessary to correspond to the situation in the fully open state; if the size of the workpiece is large, it is necessary to correspond to the situation in the half-open state.

[0038] In this embodiment, Figure 1As shown, the fixed bracket 1 includes a base 11 fixedly arranged on the frame, a column 12 is fixedly arranged on the left end of the base 11 by welding, a horizontally arranged top beam 16 is fixedly arranged on the top of the column 12 by welding, the top beam 16 and the base 11 are located on the same side of the column 12, the middle beam 15 is located between the base 11 and the top beam 16, two first toggle plates 121 are fixedly arranged on the bottom end of the column 12, and the bottom end of the single first toggle plate 121 is fixedly arranged on the base 11 by welding. A first diagonal brace 13 is fixedly arranged between the base 11 and the lower part of the column 12 by welding, the upper end of the first diagonal brace 13 is fixedly arranged on the middle part of the column 12, and the lower end is fixedly arranged on the base 11, and a second diagonal brace 14 is fixedly arranged between the upper part of the column 12 and the top beam 16 by welding, the upper end of the second diagonal brace 14 is fixedly arranged on the top beam 16, and the lower end is fixedly arranged on the middle part of the column 12. The structural strength of the entire stud welding device is enhanced by providing the first diagonal brace 13 , the second diagonal brace 14 and the first toggle plate 121 .

[0039] In this embodiment, Figure 1 As shown, a diagonal support plate 17 is fixedly connected to the top beam 16 on one side close to the lower support block 5 by welding, and the base of the automatic stud welding gun mechanism 4 is fixedly arranged on the diagonal support plate 17 .

[0040] In this embodiment, Figure 1 As shown, the middle beam 15 is welded and fixed with a first reinforcing rib 151 along the horizontal direction, the movable bracket 8 includes a first movable beam 81 hinged to the fixed bracket 1 and a second movable beam 82 for placing the second movable cylinder 7, the second movable beam 82 is fixed by welding and beveled at the upper end of the first movable beam 81, the linear guide 3 is fixed on the second movable beam 82 by bolts, and the first movable beam 81 is fixedly provided with a second reinforcing rib 811 for structural reinforcement along the length direction.

[0041] In this embodiment, Figure 3 As shown, the limiting structure 2 includes a first limiting block 21 arranged on the upper end of the middle beam 15 close to the side of the movable bracket 8, and a second limiting block 22 fixed by bolts in the middle of the first movable beam 81, wherein the first limiting block 21 is fixed on the middle beam 15 by bolts, and the second limiting block 22 is provided with a limiting groove 221 for accommodating the first limiting block 21, which limits the swing of the movable bracket 8 during welding and improves the stability of welding.

[0042] In this embodiment, Figure 1As shown, the middle beam 15 is fixedly connected to the column 12 via the middle connecting plate 123, the end of the first reinforcing rib 151 is fixedly welded to the middle connecting plate 123, and the column 12 is fixedly provided with a second toggle plate 122 coplanar with the first reinforcing rib 151. The utility model enhances the structural strength of the entire fixed bracket by providing the first reinforcing rib 151 and the second toggle plate 122 coplanar with the first reinforcing rib 151.

[0043] In this embodiment, Figure 3 and 8 As shown, a lap plate 152 is fixedly arranged on the side of the upper end of the middle beam 15 away from the first limit block 21, and a buffer column 155 is penetrated on the lap plate 152 for reducing the impact force when the movable bracket 8 and the middle beam 15 collide, and a compression spring 153 is sleeved on the side of the buffer column close to the movable bracket 8. The utility model reduces the impact force when the movable bracket and the middle beam collide with each other by arranging a compression spring, thereby improving the service life of the entire movable stud welding device.

[0044] In this embodiment, Figure 2 , 6 As shown in FIG. 7 , the first movable beam 81 and the fixed bracket 1 are connected by a hinge structure 9, which includes a hinge shaft 91 and a hinge block 92, wherein the hinge block 92 is fixed at the end by welding, the hinge block 92 is U-shaped as a whole, and a through hole is provided on the hinge block 92 for the hinge shaft 91 to pass through.

[0045] When the stud welding device of this embodiment is working, Figures 1 to 4As shown, there are multiple stud welding nodes on the workpiece. The grasping robot grasps the workpiece by means of a gripper, grasps the stud to be welded by means of a stud grasping head 41, and moves the workpiece to the stud position to be welded according to a predetermined motion trajectory. At this time, the stud welding support device is in a fully open state according to the structural avoidance requirements of the workpiece. After the workpiece is in place, the first moving cylinder 10 extends to the right, pushing the movable bracket 8 to rotate as a whole around the hinge shaft 91, until the first movable beam 81 is blocked and positioned by the first limit block 21, and the end of the compression spring 153 abuts against the side end of the first movable beam 81. At this time, the entire stud welding device is in a semi-open state, and then the second moving cylinder 7 pushes the lower support block 5 and The slider 6 slides obliquely upward along the linear guide rail 3 until the change joint 51 at the end of the lower support block 5 fits with the welding position of the workpiece and reaches the welding state. At this time, the lower support block 5 is supported on the back of the stud welding surface, and then the workpiece is fixed through the cooperation of the upper support rod 42, and the welding work is completed through the upper electrode on the stud grabbing head 41 and the lower electrode on the grabbing robot; then the second moving cylinder 7 retracts, and then the stud grabbing head 41 grabs the next stud to be welded, and the workpiece is rotated by the grabbing robot so that another place to be welded on another workpiece corresponds to the above-mentioned new stud, and then the above actions are repeated until all studs on the workpiece are welded. In this embodiment, due to the small size of the workpiece, the semi-open state is preferably selected to increase the running speed.

[0046] The utility model described above only expresses the implementation method of the utility model embodiment, and cannot be understood as limiting the scope of the utility model patent, nor is it any form of limitation on the structure of the utility model embodiment. It should be pointed out that for ordinary technicians in this field, several changes and improvements can be made without departing from the concept of the utility model embodiment, which all belong to the protection scope of the utility model embodiment.

Claims

1. A movable stud welding device, which completes the stud welding of workpieces by cooperating with a grabbing robot, characterized in that: The movable stud welding device comprises a fixed bracket (1), a movable bracket (8), a lower support block (5) and an automatic stud welding gun mechanism (4); The fixed bracket (1) is fixedly arranged on the frame, the automatic stud welding gun mechanism (4) is tilted and fixedly arranged at the end of the fixed bracket (1), the fixed bracket (1) comprises an intermediate beam (15) horizontally arranged in the middle, the end of the intermediate beam (15) is hingedly arranged in the middle of the movable bracket (8), and the end of the automatic stud welding gun mechanism (4) is provided with a stud grabbing head (41) for grabbing the stud to be welded; A first moving cylinder (10) is fixedly arranged at the lower end of the middle beam (15), and the end of the piston rod of the first moving cylinder (10) is fixedly arranged at the lower end of the movable bracket (8); The movable bracket (8) is fixedly connected to an inclined linear guide rail (3) above, a slider (6) is slidably arranged on the linear guide rail (3), the lower support block (5) is fixedly arranged on the upper end of the slider (6), and a second moving cylinder (7) for pushing the slider (6) to slide is arranged at the end of the linear guide rail (3) away from the automatic stud welding gun mechanism (4); An upper support rod (42) corresponding to the lower support block (5) is fixedly arranged at the lower end of the automatic stud welding gun mechanism (4); A limiting structure (2) is provided between the intermediate beam (15) and the movable bracket (8) for preventing the movable bracket (8) from further rotating relative to the fixed bracket (1).

2. A movable stud welding device according to claim 1, characterized in that: The fixed bracket (1) comprises a base (11) fixedly arranged on a frame, a column (12) fixedly arranged at one end of the base (11), a horizontally arranged top beam (16) fixedly arranged at the top end of the column (12), a plurality of first toggle plates (121) fixedly arranged at the bottom end of the column (12), the bottom end of a single first toggle plate (121) fixedly arranged on the base (11), a first diagonal brace (13) fixedly arranged between the base (11) and the lower part of the column (12), and a second diagonal brace (14) fixedly arranged between the upper part of the column (12) and the top beam (16).

3. A movable stud welding device according to claim 2, characterized in that: A diagonal support plate (17) is fixedly and obliquely connected to one side of the top beam (16) close to the lower support block (5), and the base of the automatic stud welding gun mechanism (4) is fixedly arranged on the diagonal support plate (17).

4. The movable stud welding device according to claim 1, characterized in that: The intermediate beam (15) is fixedly provided with a first reinforcing rib (151) in a horizontal direction, the movable bracket (8) comprises a first movable beam (81) hinged to the fixed bracket (1) and a second movable beam (82) for placing the second moving cylinder (7), the second movable beam (82) is fixedly obliquely connected to the upper end of the first movable beam (81), the linear guide rail (3) is fixedly provided on the second movable beam (82), and the first movable beam (81) is fixedly provided with a second reinforcing rib (811) in a length direction.

5. A movable stud welding device according to claim 4, characterized in that: The limiting structure (2) comprises a first limiting block (21) arranged at the upper end of the middle beam (15) close to the movable bracket (8), and a second limiting block (22) fixedly arranged in the middle of the first movable beam (81), wherein the second limiting block (22) is provided with a limiting groove (221) for accommodating the first limiting block (21).

6. A movable stud welding device according to claim 5, characterized in that: The intermediate beam (15) and the column (12) are fixedly connected via an intermediate connecting plate (123); the end of the first reinforcing rib (151) is fixedly welded to the intermediate connecting plate (123); and a second toggle plate (122) coplanar with the first reinforcing rib (151) is fixedly provided on the column (12).

7. The movable stud welding device according to claim 5, characterized in that: A lap plate (152) is fixedly provided on a side of the upper end of the middle beam (15) away from the first limit block (21); a buffer column (155) is provided on the lap plate (152) for reducing the impact force applied when the movable bracket (8) and the middle beam (15) collide; and a compression spring (153) is sleeved on a side of the buffer column close to the movable bracket (8).

8. The movable stud welding device according to claim 1, characterized in that: The end of the lower support block (5) is provided with a change joint (51) that abuts against the workpiece.

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