Frame welding positioning and fixing device

Abstract

The application discloses a kind of frame welding positioning fixing device, it is related to mechanical welding tooling technical field.The device includes base and a plurality of positioning components modularly fixed thereon, including core barrel reference support, frame front lug positioning block, core barrel front end interface positioning block and pressing plate, square beam positioning block, handle bracket positioning block, frame rear lug positioning block, round beam positioning block and pressing plate and the like.Each fixed module is bolted on the base, and the relative size of the parts can be accurately corrected according to the gap and the splicing angle between the pipe assembly.The application adopts modular accurate positioning and adjustable clamping structure, fixes the special-shaped frame parts in three-dimensional direction, completely solves the problem of manual assembly misplacement, eliminates welding deviation and virtual welding defects, ensures the size consistency and high precision of mass-produced frames, and meets the vehicle assembly tolerance requirements.

Description

Technical Field

[0001] This invention belongs to the field of mechanical welding tooling technology, specifically relating to a special welding positioning and fixing device for vehicle frames that is adaptable to irregular vehicle frame structures, provides high-precision positioning, and facilitates welding operations. Background Technology

[0002] This chassis is a non-standard product with a complex structure. The main material is aluminum alloy, and it features a crisscrossing frame and high-precision positioning dimensions. Its welding accuracy, structural strength, and weld stability directly determine the assembly accuracy, load-bearing capacity, and operational safety of the chassis and its accessories. Due to the complex chassis structure and numerous welding points, using traditional methods of repeated clamping, workpiece movement, and position adjustments will severely affect the overall welding accuracy and make it impossible to guarantee the positioning dimensions between components. In mass production, if welding dimensions cannot be guaranteed, it will lead to poor interchangeability of the same workpiece, affecting subsequent overall assembly, resulting in insufficient fit and a low product yield. In summary, existing ordinary welding fixtures cannot meet the needs of high-precision, standardized, and mass-produced chassis welding. There is an urgent need to design a specialized welding positioning and fixing device that is highly targeted, high-precision, and adaptable to the irregular structure of the chassis. Summary of the Invention

[0003] The purpose of this invention is to provide a chassis welding positioning and fixing device, mainly including a chassis positioning base, an adjustable positioning clamping assembly, a limiting locking assembly, and chassis accessory positioning blocks, etc. These modules work together to ensure the welding quality of the chassis. Addressing the complex structure, numerous accessories, and high positioning accuracy requirements of chassis, this device, based on the dimensions of the main chassis structure and accessories, uses the positioning base as a foundation and designs different modules to fix the relative positions of various parts and the chassis structure. Each fixing module is bolted to the positioning base, allowing for precise correction of the assembly gaps and splicing angles of chassis tubular components according to the relative dimensions between the components. This completely solves the problems of misalignment and uneven gaps in manual assembly, ensuring the overall assembly accuracy of the chassis and eliminating welding offset defects. Compared to traditional welding fixtures and manual welding processes, this invention specifically addresses the pain point of unreliable relative positional accuracy in chassis welding, playing a significant role in processing accuracy, product quality, production efficiency, versatility, and safety. Attached Figure Description

[0004] Figure 1 This is a schematic diagram of the structure of a vehicle frame welding positioning and fixing device according to the present invention;

[0005] Figure 2 This is a structural diagram of an irregularly shaped vehicle frame.

[0006] Explanation of reference numerals in the attached figures:

[0007] 1-Square crossbeam positioning block; 2-Handle bracket positioning block; 3-Core tube reference bracket; 4-Rear frame hanger positioning block; 5-Base; 6-Front frame hanger positioning block; 7-Core tube front interface pressure plate; 8-Core tube front interface positioning block; 9-Round crossbeam positioning block; 10-Round crossbeam pressure plate; 11-Square crossbeam; 12-Handle bracket; 13-Core tube; 14-Rear frame hanger; 15-Front frame hanger; 16-Round crossbeam. Detailed Implementation

[0008] A vehicle frame welding positioning and fixing device includes a base (5), on which a plurality of positioning components are modularly fixed; the positioning components include a core cylinder reference bracket (3) for reference positioning of the core cylinder (13), a vehicle frame front hanger positioning block (6) for intermediate support of the core cylinder (13), a core cylinder front end interface positioning block (8) for supporting and positioning the front end of the core cylinder (13), and a core cylinder front end interface pressure plate (7) for fixing the core cylinder (13) vertically; the positioning components The components also include a square beam positioning block (1) for positioning the square beam (11), a handlebar bracket positioning block (2) for fixing the handlebar bracket (12), a rear frame hanger positioning block (4) for positioning the rear frame hanger (14), a front frame hanger positioning block (6) for positioning the front frame hanger (15), a round beam positioning block (9) for positioning the round beam (16), and a round beam pressure plate (10) for fixing the round beam (16) in the vertical direction.

[0009] The core tube reference bracket (3), square beam positioning block (1), handle bracket positioning block (2), frame rear hanger positioning block (4), frame front hanger positioning block (6), core tube front end interface positioning block (8), and round beam positioning block (9) are all fixed on the base (5) by bolts, and the position of each positioning block can be precisely corrected according to the relative dimensions between each component.

[0010] The core tube front end interface pressure plate (7) and the circular crossbeam pressure plate (10) are both tightened and fixed in the vertical direction by bolts, and can be removed after welding to release the fixation restriction on the workpiece.

[0011] The front hanger positioning block (6) of the frame is also used to provide intermediate support for the core tube (13) to prevent the core tube (13) from being suspended and deformed during welding.

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The frame is essentially symmetrical on both sides; therefore, this description focuses only on one side of the structure.

[0013] like Figure 1 and Figure 2As shown, this embodiment provides a vehicle frame welding positioning and fixing device, including a base 5. The specific implementation steps are as follows:

[0014] First, arrange each positioning block according to Figure 2 The various components of the frame are bolted to the base 5. Then, using the core tube reference bracket 3 as the positioning reference for the entire frame, the core tube 13 is installed on the cylindrical core of the core tube reference bracket 3. The core tube 13 is supported in the middle by the frame front hanger positioning block 6 to prevent the core tube from being suspended and deformed during welding. The core tube front end interface positioning block 8 supports the front end of the core tube 13 and uses the front end step of the core tube 13 for front-rear positioning. The core tube 13 is fixed vertically by bolts using the core tube front end interface pressure plate 7. Next, according to the welding assembly dimensions of the square crossbeam 11 and the core tube 13, the square crossbeam 11 and the square crossbeam positioning block 1 are fixed in position, and their fixed position is determined by adjusting the bolt positions of the square crossbeam positioning block 1. According to the welding assembly dimensions of the handlebar bracket 12 and the core tube 13, the handlebar bracket 12 and the handlebar bracket positioning block 2 are fixed in position by bolts. According to the welding assembly dimensions of the rear hanger 14 and the core tube 13, the rear hanger 14 is positioned vertically and horizontally using the rear hanger positioning block 4. Similarly, according to the welding assembly dimensions of the front hanger 15 and the core tube 13, the front hanger 15 is positioned vertically and horizontally using the front hanger positioning block 6. Finally, according to the welding assembly dimensions of the circular crossbeam 16 and the core tube 13, the circular crossbeam 16 is positioned vertically and horizontally using the circular crossbeam positioning block 9 and the circular crossbeam pressure plate 10. After welding all components, first remove the fixing bolts of the core tube front interface pressure plate 7 and the circular crossbeam pressure plate 10 to release the vertical fixation of the core tube 13; then remove the fixing bolts of the core tube reference bracket 3 and remove it from the base 5 to release the horizontal fixation of the core tube 13; subsequently, the entire frame can be removed from the welding device to proceed to the next product. This device effectively eliminates operational errors from manual assembly and welding through modular precision positioning, adjustable positioning clamping, and a limiting and locking structure. The assembly gaps, splicing angles, and overall dimensional accuracy of the frame components are precisely controlled. During welding, because each component is fixed in three dimensions, component displacement or misalignment will not occur, effectively preventing defects such as weld misalignment, incomplete welds, and missed welds. Mass-produced frames have uniform dimensions and consistent precision, fully meeting the assembly tolerance requirements of the entire vehicle, effectively ensuring a high product yield.

Claims

1. A vehicle frame welding positioning and fixing device, characterized in that, The system includes a base (5) on which several positioning components are modularly fixed; the positioning components include a core cylinder reference bracket (3) for reference positioning of the core cylinder (13), a frame front hanger positioning block (6) for intermediate support of the core cylinder (13), a core cylinder front end interface positioning block (8) for supporting and positioning the front end of the core cylinder (13), and a core cylinder front end interface pressure plate (7) for fixing the core cylinder (13) vertically; the positioning components also include a system for... The square beam positioning block (1) is used to position the square beam (11), the handle bracket positioning block (2) is used to fix the handle bracket (12), the rear hanger positioning block (4) is used to position the rear hanger (14) of the frame, the front hanger positioning block (6) is used to position the front hanger (15) of the frame, the round beam positioning block (9) is used to position the round beam (16), and the round beam pressure plate (10) is used to fix the round beam (16) in the vertical direction.

2. The vehicle frame welding positioning and fixing device according to claim 1, characterized in that: The core tube reference bracket (3), square beam positioning block (1), handle bracket positioning block (2), frame rear hanger positioning block (4), frame front hanger positioning block (6), core tube front end interface positioning block (8), and round beam positioning block (9) are all fixed on the base (5) by bolts, and the position of each positioning block can be precisely corrected according to the relative dimensions between each component.

3. The vehicle frame welding positioning and fixing device according to claim 1, characterized in that: Both the front end interface pressure plate (7) of the core tube and the circular crossbeam pressure plate (10) are clamped and fixed in the vertical direction by bolts, and can be removed after welding to release the fixation restriction on the workpiece.

4. The vehicle frame welding positioning and fixing device according to claim 1, characterized in that: The front hanger positioning block (6) of the frame is also used to provide intermediate support for the core tube (13) to prevent the core tube (13) from being suspended and deformed during welding.

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