Robotic welding fixture

Abstract

The utility model relates to welding auxiliary equipment technical field especially a mechanical hand welding frock, aims at solving the problem of easy deformation, the problem of uneven joint and the problem of low efficiency when thin plate box body is welded, its technical scheme's main point is: including internal support device and external clamping device, internal support device has a fixed positioning block and three movable support blocks, and movable support block is driven to top stretch or contract by first drive mechanism, external clamping device has multiple groups of clamping units driven by second drive mechanism, and the total support force of internal support device is greater than the total clamping force of external clamping device. The utility model is mainly used for the automatic welding of thin plate box body, can effectively restrain the welding deformation, guarantees the joint quality, improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of welding auxiliary equipment, and in particular to a robotic welding fixture. Background Technology

[0002] While welding robots possess high positioning accuracy, specialized auxiliary tooling is essential to ensure stability and repeatability during the welding process, especially for workpieces with high precision requirements, such as thin-plate boxes. This tooling is designed to precisely fix, support, and position the welding components, reducing welding deformation and ensuring that each weld meets the expected quality standards.

[0003] In existing technologies, fixing such workpieces mostly relies on manual operation, which has the following drawbacks:

[0004] 1. Low efficiency: Existing technology relies on manual operation, which takes a long time to prepare before welding. Each fixing point needs to be tightened and confirmed by the operator by hand, which is extremely disadvantageous in large-scale production.

[0005] 2. Poor consistency: Since it is a manual operation, it is difficult to guarantee the precise positioning and consistency of the weld points for each welding, which directly affects the quality and appearance of the product.

[0006] 3. Workpiece deformation: During the welding process, thin plate boxes will generate significant welding stress, which will cause the workpiece to undergo regular shrinkage deformation after welding. Traditional rigid tooling cannot effectively deal with this problem, which can easily lead to product scrap or out-of-tolerance precision.

[0007] 4. High labor intensity and safety risks: The existing process requires a lot of physical labor, and long hours of work can easily lead to worker fatigue, affecting production efficiency and health; in addition, the operation process will generate harmful gases, strong light, high temperature, etc., which pose a threat to the health of operators and cause occupational disease hazards.

[0008] Therefore, there is an urgent need for a special tooling that can automatically and precisely clamp the components and effectively suppress and release welding stress, thereby ensuring the welding quality of thin-plate boxes. Utility Model Content

[0009] This utility model aims to overcome the shortcomings of the existing technology and provide a robotic welding fixture that effectively prevents uneven seams and welding deformation in thin plate boxes during the welding process, realizes rapid and automatic clamping and release of workpieces, thereby improving production efficiency, reducing labor intensity, ensuring product quality stability, and eliminating the safety risks of manual operation.

[0010] The technical solution adopted by this utility model to solve its technical problem is: a robotic welding fixture for welding thin plate boxes, comprising:

[0011] Internal support devices are used to provide support and positioning from inside the box of thin sheet metal to be welded;

[0012] External clamping device for applying clamping force from outside the sheet metal box;

[0013] The internal support device includes a fixed positioning block and three movable support blocks;

[0014] The fixed positioning block is fixedly installed and serves as the positioning reference for the thin plate box body;

[0015] The movable support block is connected to the first drive mechanism and can extend to a predetermined support position or retract to a release position along the inside of the thin plate box under the drive of the first drive mechanism.

[0016] The external clamping device includes multiple clamping units, which are connected to the second drive mechanism and can extend under the drive of the second drive mechanism to press against the outer wall of the thin plate box, or retract to release the thin plate box.

[0017] Furthermore, the total supporting force of the internal support device is greater than the total clamping force of the external clamping device.

[0018] To achieve rapid, automated, and highly reliable support and clamping actions, this invention further specifies that both the first and second drive mechanisms are cylinders, which significantly improves clamping efficiency, ensures consistency of actions, and lays the foundation for automated production.

[0019] To ensure the internal support block is not pushed back under the resistance of internal and external forces and to guarantee stable positioning dimensions, this invention further specifies that the total thrust of the cylinders driving the movable support block in the internal support device is greater than the total thrust of all cylinders in the external clamping device. Through precise mechanical design, the reference position of the internal support is locked, thereby ensuring the accuracy of the final formed dimensions of the workpiece.

[0020] In order to optimize the layout of the external clamping force and control the overall shape of the thin plate box in a balanced manner, this utility model further specifies that the number of clamping units of the external clamping device is four sets, which are set corresponding to the four corners of the thin plate box. By applying force to the four corners of the thin plate box simultaneously, uniform and reliable clamping is achieved, avoiding local twisting.

[0021] To further optimize the clamping point position and directly ensure the tight alignment of the weld, this utility model is further specifically defined as follows: two clamping units are provided on each edge of the thin plate box to be close to the weld edge, ensuring the consistency of the joint, and ensuring the consistency and high-quality forming of the weld along the entire length, even if the clamping force is directly applied to the critical area.

[0022] Compared with the prior art, the present invention has the following significant advantages:

[0023] I. Significantly Improved Welding Quality: Through the synergistic effect of internal support and external clamping, combined with a mechanical design where internal force is greater than external force, extremely stable and precise positioning is provided for the thin-plate box body, effectively suppressing welding deformation, ensuring neat seams, and significantly reducing product defect rate.

[0024] II. Significantly improved production efficiency: The entire clamping and releasing process is driven by a cylinder and can be completed in a few seconds, completely replacing the tedious process of manually tightening each piece one by one, making it particularly suitable for large-scale mass production.

[0025] 3. Effectively release welding stress: The retractable design of the internal movable support block is a clever concept of using movement to control movement. It allows the tooling to actively release the constraint on the workpiece after welding, so that the thin plate box can shrink slightly according to its inherent law, thereby avoiding permanent deformation or workpiece jamming caused by the inability to release stress.

[0026] IV. Improved Ergonomics and Safety: Operators only need to load and unload materials, without participating in the fastening and welding processes, which greatly reduces labor intensity and skill requirements. At the same time, it keeps them away from welding arc light, fumes and high temperatures, fundamentally eliminating related occupational health and safety hazards. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0029] Figure 2 yes Figure 1 Top view;

[0030] Figure 3 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0031] Figure 4 yes Figure 3 Top view.

[0032] The numbers in the diagram are: 1. Fixed positioning block; 2. Movable support block; 3. First drive mechanism; 4. Clamping unit; 5. Second drive mechanism. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] This utility model provides a robotic welding fixture for welding thin plate boxes. Its core design concept is to effectively solve the problems of deformation and uneven seams during the welding of thin plate boxes by using the synergistic effect of internal support and external clamping, and ensuring that the internal support force is dominant.

[0035] like Figure 1-4 As shown, the welding fixture mainly includes a rigid base platform, as well as an internal support device and an external clamping device installed on it.

[0036] The internal support device consists of a fixed positioning block 1 and three movable support blocks 2. The fixed positioning block 1 is securely installed in a designated corner of the base platform by bolts, serving as a positioning reference during the assembly of the entire sheet metal box. The operator can quickly complete the initial positioning of the sheet metal box by pressing the adjacent side plates of the sheet metal box against the two vertical reference surfaces of the fixed positioning block 1. There are three movable support blocks 2, arranged in three internal corners of the sheet metal box opposite to the fixed positioning block. Each movable support block 2 is connected to a first drive mechanism 3. In this embodiment, the first drive mechanism 3 is preferably a cylinder. The piston rod of the cylinder extends and retracts, directly driving the movable support block 2 to move linearly. When the cylinder extends, the movable support block 2 reaches the predetermined support position, tightening the sheet metal box from the inside. When the cylinder retracts, the movable support block 2 returns to the release position, making room for the shrinkage of the sheet metal box after welding.

[0037] The external clamping device consists of four clamping units 4. Each clamping unit 4 is connected to a second drive mechanism 5, which, under the drive of the second drive mechanism 5, can extend to press against the outer wall of the thin-plate box or retract to release the thin-plate box. The second drive mechanism 5 is preferably a cylinder. These four clamping units 4 are arranged corresponding to the four corners of the thin-plate box. Specifically, two clamping units 4 are provided on each edge of the thin-plate box. The purpose of this arrangement is to ensure that the clamping points are as close as possible to the seam of the thin-plate box edge, thereby ensuring the tight fit and consistency of the entire seam during welding.

[0038] To ensure the positioning accuracy of the tooling, this solution establishes a key mechanical relationship: the total supporting force of the internal support device is greater than the total clamping force of the external clamping device. This relationship is achieved through the selection of cylinders and the setting of system air pressure. In this embodiment, a cylinder with greater thrust is selected as the internal support cylinder of the first drive mechanism 3, and its total thrust is designed to be greater than the total thrust of all the external clamping cylinders of the second drive mechanism 5. This design ensures that the position of the internal support device remains stable when pressure is applied by the external clamping device, thereby ensuring the accuracy and stability of the internal dimensions of the thin-plate box.

[0039] This invention employs an internal support device consisting of a fixed positioning block 1 and three movable support blocks 2, along with four sets of external clamping devices, effectively solving problems such as uneven seams and welding deformation in thin-plate box-type welded parts. During operation, the internal support block extends to a predetermined position under the drive of a cylinder. Subsequently, the external clamping devices, through cylinder actuation, press the thin-plate box onto the internal support device, ensuring a tight fit and thus achieving dimensional fixation. The thrust of the cylinder used in the internal support device is greater than the thrust of the external clamping cylinder, thereby ensuring that the positioning function of the internal support device is not compromised.

[0040] The working process of this robotic welding fixture is as follows: Workpiece placement: The operator places the assembled thin-plate box onto the fixture and ensures it is close to the fixed positioning block 1; Internal support: The first drive mechanism 3 activates, driving three movable support blocks 2 to push out and internally tighten the thin-plate box; External clamping: The second drive mechanism 5 activates, driving four sets of clamping units 4 to push out and externally press the thin-plate box wall against the internal support device; Automatic welding: The welding robot automatically welds the seams of the thin-plate box; Workpiece release: After welding, the external clamping device first retracts to release the thin-plate box, then the internal movable support blocks 2 retract, allowing the operator to remove the welded thin-plate box.

[0041] The robotic welding fixture provided by this utility model has the following beneficial effects: stable product quality and significantly reduced defect rate; effectively reduces labor intensity and lowers the skill requirements for operators, who only need to assemble the parts and do not need to participate in the welding process; reduces dependence on the lighting of the work site; and fundamentally eliminates safety hazards. When used in conjunction with automated equipment, this fixture keeps operators away from the welding work area, and their limbs do not need to enter the equipment operating space, thus ensuring personal safety.

[0042] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A robotic welding fixture, characterized in that, For welding thin-plate boxes, including: Internal support devices are used to provide support and positioning from inside the box of thin sheet metal to be welded; External clamping device for applying clamping force from outside the sheet metal box; The internal support device includes a fixed positioning block (1) and three movable support blocks (2); The fixed positioning block (1) is fixedly installed as a positioning reference for the thin plate box body; The movable support block (2) is connected to the first drive mechanism (3) and can extend to a predetermined support position or retract to a release position along the inner direction of the thin plate box under the drive of the first drive mechanism (3). The external clamping device includes multiple clamping units (4), which are connected to the second driving mechanism (5) and can extend under the drive of the second driving mechanism (5) to press against the outer wall of the thin plate box, or retract to loosen the thin plate box. Furthermore, the total supporting force of the internal support device is greater than the total clamping force of the external clamping device.

2. The robotic welding fixture according to claim 1, characterized in that, Both the first drive mechanism (3) and the second drive mechanism (5) are cylinders.

3. The robotic welding fixture according to claim 2, characterized in that, The total thrust of the cylinders driving the movable support block (2) in the internal support device is greater than the total thrust of all cylinders in the external clamping device.

4. The robotic welding fixture according to claim 1, characterized in that, The number of clamping units (4) of the external clamping device is four, and they are set corresponding to the four corners of the thin plate box.

5. The robotic welding fixture according to claim 4, characterized in that, Two clamping units (4) are provided on each edge of the thin plate box.

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