Balancing rod welding and fixing structure

Abstract

The utility model discloses a balancing pole welding and fixing structure, which relates to the technical field of balancing pole welding and comprises a working table, an auxiliary table arranged on the working table, two positioning columns symmetrically distributed on two sides of the auxiliary table, an air bag embedded in a positioning column fixing groove and an air delivery pipe connected with the positioning columns and an air pump. After the air pump is started, air is injected into the air bag through the air conveying pipe to enable the air bag to be evenly expanded, annular pressure is applied to the circular rings at the two ends of the balance rod, and damage-free fixing is achieved. Through the design of air bag flexible contact and pressure dispersion, damage to the surface of the workpiece caused by local stress concentration is effectively avoided, and the welding stability and the finished product qualification rate are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of balance bar welding, specifically to a balance bar welding fixing structure. BACKGROUND

[0002] In the production process of the balance bar, the fixing in the welding stage is particularly crucial. The traditional process usually adopts the manual spot welding and full welding mode, and the fixing device needs to be relied on to ensure the stability of the workpiece during the full welding.

[0003] The welding fixing device disclosed in the publication No. CN210849027U comprises a plurality of support assemblies and a base, the support assemblies are arranged on the base according to the positions of the copper pipe assemblies, each support assembly comprises a supporting assembly, a connecting assembly and a clamping assembly, the supporting assembly is arranged on the base, the connecting assembly is movably sleeved on the supporting assembly, and the clamping assembly is movably installed on the connecting assembly; the clamping assembly comprises a body and a plurality of jacks, and the plurality of jacks are symmetrically arranged on both sides of the body to fix the copper pipe assembly.

[0004] However, the device has significant defects in actual application: the jack assembly directly acts on the surface of the balance bar, and local concentrated stress is easy to cause surface indentation or scratches of the workpiece, especially for the balance bar with high precision or strict surface quality requirements, such damage may directly lead to product scrap, therefore, we propose a balance bar welding fixing structure. UTILITY MODEL CONTENT

[0005] The utility model proposes a balance bar welding fixing structure in view of the deficiency in the prior art.

[0006] In order to solve the above technical problems, the utility model solves the problem that the balance bar is scratched by directly clamping the balance bar in the prior art through the following technical scheme.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A balance bar welding fixing structure comprises a workbench, an auxiliary table for supporting the balance bar is arranged on the workbench, two positioning columns are arranged, the two positioning columns are symmetrically arranged on both sides of the auxiliary table, and uniform distribution fixing grooves are arranged on the side surface of the positioning column; a gas bag is embedded in the fixing groove, an inner cavity is arranged in the positioning column, and a gas hole communicating with the gas bag is arranged on the inner side of the inner cavity; a gas pump is fixedly arranged on the workbench and communicates with the opening at the top of the positioning column through a gas conveying pipe; wherein, the gas bag expands after being inflated, uniformly presses the two end rings of the balance bar to fix the workpiece.

[0009] Preferably, a connecting pipe is fixedly arranged at the opening at the top of the positioning column, and the gas conveying pipe is detachably connected with the connecting pipe through a quick release buckle.

[0010] Preferably, the quick-release buckle comprises symmetrically distributed arc-shaped clamps and two groups of bolts, the connecting ends of the gas conveying pipe and the connecting pipe are fixedly provided with connecting plates, the arc-shaped clamps are covered outside the connecting plates and are fastened through the bolts.

[0011] Preferably, the connecting plates are provided with annular grooves on the contact surfaces, and sealing ring pads are embedded in the annular grooves.

[0012] Preferably, the material of the sealing ring pad is rubber.

[0013] Preferably, the surface of the auxiliary table is provided with anti-skid lines for increasing the friction between the balance bar and the auxiliary table.

[0014] Preferably, a pressure sensor is arranged in the inner cavity of the positioning column, and the pressure sensor is electrically connected with the air pump for real-time adjustment of the air pressure in the air bag.

[0015] Preferably, the outer surface of the air bag is covered with a flexible protective layer, and the material of the flexible protective layer is polyurethane.

[0016] Preferably, the bottom of the workbench is fixedly provided with height-adjustable supporting feet for adapting to the levelness of different work planes.

[0017] Preferably, the gas conveying pipe is a high-pressure-resistant hose, and the surface of the high-pressure-resistant hose is covered with an anti-abrasion woven layer.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model discloses a uniform inflation and pressure exertion of the air bag, disperses the local concentrated stress generated by the traditional rigid top column, effectively prevents the scrapping problem caused by the pressure mark or scratch on the surface of the balance bar, is especially suitable for the workpiece of high precision and strict surface quality requirement, and remarkably improves the finished product qualification rate.

[0020] The air bag pressure can be adjusted in real time through the air pump and the pressure sensor, so that the workpiece is always in a stable state during the welding process, welding deviation caused by loosening is avoided, welding consistency and product precision are improved, and the rework rate is reduced.

[0021] Through the height-adjustable supporting feet, the high-pressure-resistant gas conveying pipe and the controllable inflation characteristics of the air bag, the device can adapt to the fixing requirements of balance bars of different sizes and shapes, does not need to frequently replace the clamps, shortens the production preparation time, and improves the equipment versatility and operation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0024] Figure 2 It is a schematic diagram of the connection between the positioning column and the air pump of the present application.

[0025] Figure 3 It is a schematic diagram of the structure of the positioning column part when the air bag is inflated.

[0026] Figure 4 It is a schematic diagram of the internal structure of the positioning column of the present application.

[0027] Figure 5 It is a schematic diagram of the quick-release buckle structure of the present application.

[0028] Figure 6 It is a schematic diagram of the flexible protective layer outside the air bag of the present application.

[0029] Figure number explanation: 1, workbench; 2, auxiliary table; 3, positioning column; 4, fixed groove; 5, air bag; 6, inner cavity; 7, air pump; 8, gas conveying pipe; 9, connecting pipe; 10, quick-release buckle; 11, arc-shaped clamp; 12, bolt; 13, connecting plate; 14, annular groove; 15, sealing ring pad; 16, supporting foot; 17, pressure sensor; 18, flexible protective layer. DETAILED DESCRIPTION

[0030] The present application will be described in further detail below with reference to the drawings. EMBODIMENT

[0031] Please refer to Figures 1-6A balance bar welding fixing structure, comprising: a workbench 1, the workbench 1 is provided with an auxiliary table 2 for supporting the balance bar, the auxiliary table 2 provides a stable supporting surface for the balance bar, and ensures that the workpiece remains horizontal during the welding process; two positioning columns 3 are provided, the two positioning columns 3 are symmetrically arranged on the two sides of the auxiliary table 2, and the side surface of the positioning column 3 is provided with uniformly distributed fixing grooves 4; a gas bag 5 is embedded in the fixing groove 4, the inside of the positioning column 3 is provided with an inner cavity 6, and the inner side of the inner cavity 6 is provided with a gas hole communicated with the gas bag 5; a gas pump 7 is fixedly arranged on the workbench 1 and is communicated with the top opening of the positioning column 3 through a gas conveying pipe 8; the gas conveyed by the gas pump 7 is uniformly introduced into the gas bag 5 through the inner cavity 6 and the gas hole in the positioning column 3. When the gas pump 7 is started, the gas bag 5 is inflated and expanded, and uniform ring pressure is applied to the annular rings at the two ends of the balance bar, so that the local stress concentration problem of the traditional rigid top column is avoided, and damage-free clamping is realized. This design is especially suitable for precision workpieces with high surface finish requirements, significantly improves the welding yield, and simplifies the complexity of the fixing operation.

[0032] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings:

[0033] Please refer to Figures 1-6 The utility model discloses through the even expansion of gas bag 5 after inflation, the local concentrated stress generated by traditional rigid top column is dispersed, effectively prevent the scrapping problem caused by the surface indentation or scratch of balance bar, especially suitable for high-precision and strict surface quality workpiece, significantly improve the qualified rate of finished product.

[0034] The connecting pipe 9 is fixedly arranged at the top opening of the positioning column 3, the gas conveying pipe 8 is detachably connected with the connecting pipe 9 through the quick-release buckle 10, the connecting pipe 9 serves as the gas flow passage between the gas pump 7 and the positioning column 3, and the fixed arrangement ensures the air tightness. The design of the quick-release buckle 10 allows an operator to complete the installation or dismounting of the gas conveying pipe 8 without tools, greatly shortens the time for equipment maintenance or replacement of accessories. This improvement is especially suitable for scenes requiring frequent adjustment or cleaning of the gas circuit, improves the maintainability and operation flexibility of the equipment.

[0035] In addition, the quick-release buckle 10 comprises symmetrically distributed arc-shaped clamping sleeves 11 and two groups of bolts 12, the connecting ends of the gas conveying pipe 8 and the connecting pipe 9 are fixedly provided with connecting plates 13, the arc-shaped clamping sleeves 11 are wrapped outside the connecting plates 13 and are fastened through the bolts 12, the arc-shaped clamping sleeves 11 are wrapped outside the connecting plates 13, and the symmetric tightening of the two side bolts 12 forms uniform clamping force on the connecting plates 13. This mechanical locking mode not only ensures the stability of the gas circuit connection, but also effectively disperses the impact caused by external vibration or gas pressure fluctuation, avoids interface loosening or air leakage. In addition, the wrapping design of the arc-shaped clamping sleeves 11 enhances the tensile strength of the buckle, is suitable for high-pressure gas source environment, and ensures long-term stable operation of the equipment.

[0036] Further, the contact surface of the connecting plate 13 is provided with an annular groove 14, and a sealing ring pad 15 is embedded in the annular groove 14. The material of the sealing ring pad 15 is rubber, and the depth of the annular groove 14 matches the thickness of the sealing ring pad 15. When the two connecting plates 13 are pressed tightly by the bolts 12, the sealing ring pad 15 is compressed and deformed in the annular groove 14, filling the small gap between the interfaces and forming a double-sealing barrier. This design effectively prevents gas leakage from the connection, even in high-pressure or frequent disassembly situations, maintaining the sealing of the gas path and further improving the safety and reliability of the equipment. Rubber has high elasticity, wear resistance and corrosion resistance, and can maintain stable sealing performance under different temperatures and gas source pressures. Its softness can adapt to the slight unevenness of the surface of the connecting plate 13, ensuring that the sealing ring pad 15 tightly fits the contact surface. In addition, the aging resistance of the rubber material prolongs the service life of the sealing element, reducing maintenance frequency and cost.

[0037] In the technical solution, the surface of the auxiliary table 2 is provided with anti-skid lines for increasing the friction between the balance bar and the auxiliary table 2, improving the static friction between the balance bar and the auxiliary table 2, and preventing the workpiece from sliding or deviating during welding due to vibration or external force. The layout of the anti-skid lines is optimized to maximize the friction while avoiding scratches on the bottom of the workpiece, especially for metal or coated workpieces with strict surface treatment requirements, further ensuring the welding positioning accuracy.

[0038] In the technical solution, the inner cavity 6 of the positioning column 3 is provided with a pressure sensor 17, and the pressure sensor 17 is electrically connected with the air pump 7 for real-time adjustment of the internal air pressure of the air bag 5. The pressure sensor 17 monitors the internal air pressure of the air bag 5 in real time and feeds back data to the air pump 7 control system. When the air pressure fluctuates due to temperature changes or workpiece deformation is detected, the system automatically adjusts the output of the air pump 7 to maintain the constant pressure of the air bag 5. This closed-loop control mechanism ensures that the workpiece receives stable clamping force during the entire welding process, avoiding fixation failure caused by insufficient pressure or workpiece deformation caused by excessive pressure, significantly improving the consistency of the welding process and product yield.

[0039] In the technical solution, the outer surface of the air bag 5 is covered with a flexible protective layer 18, and the material of the flexible protective layer 18 is polyurethane. The flexible protective layer 18 has high elasticity and low hardness characteristics, which can buffer local pressure peaks when the air bag 5 expands and contacts the workpiece, avoiding micro-scratches on the surface of the workpiece caused by direct friction of the air bag 5. At the same time, the polyurethane material is resistant to high temperature and chemical corrosion, and can adapt to the heat or splashes generated during welding, prolonging the service life of the air bag 5 and further protecting the surface quality of the workpiece.

[0040] In the technical solution, the bottom of the workbench 1 is fixedly provided with an adjustable height supporting leg 16 for adapting to the levelness of different work planes. The supporting leg 16 is adjusted in height through a threaded structure or a hydraulic device (not shown in the drawing), so that the workbench 1 can adapt to different ground flatness or inclination angles and ensure the overall levelness of the equipment. This design not only improves the stability of the welding process, but also expands the application scenarios of the equipment, such as rapid deployment in non-standard workshops or temporary workstations, reduces the influence of the environment on the welding precision, and enhances the versatility of the equipment.

[0041] It is worth noting that the gas conveying pipe 8 is a high-pressure resistant hose, and its surface is covered with an anti-abrasion woven layer. The high-pressure resistant hose adopts a multi-layer composite structure, the inner layer is corrosion-resistant rubber, the middle layer is a steel wire reinforced mesh, and the outer layer is an anti-abrasion nylon or polyester woven layer (not shown in the drawing). This structure can withstand the high-pressure gas flow generated by the air pump 7, while resisting external mechanical friction, oil stains or high-temperature environment erosion. The presence of the woven layer further prevents the hose from breaking due to bending or dragging, ensuring the long-term safe operation of the gas circuit and reducing the risk of equipment failure.

[0042] The use principle of the device is described as follows:

[0043] Firstly, the adjustable supporting leg 16 at the bottom of the workbench 1 is rotated to adapt the workbench 1 to the ground flatness and ensure the overall levelness. This step avoids the workpiece fixation deviation caused by the inclined table surface;

[0044] Then, the balance bar is horizontally placed on the auxiliary table 2, the anti-skid lines on the surface of the auxiliary table 2 are used to increase the friction force and prevent the workpiece from sliding, and the balance bar position is adjusted so that the two end ring sleeves are inserted into the fixed groove 4 area of the two side positioning columns 3, ensuring the accurate alignment of the contact surface between the ring and the air bag 5;

[0045] The high-pressure resistant gas conveying pipe 8 of the air pump 7 is connected to the connecting pipe 9 at the top of the positioning column 3 through the quick-release buckle 10. During operation, the connecting plates 13 of the gas conveying pipe 8 and the connecting pipe 9 are aligned, the arc-shaped clamping sleeve 11 is wrapped and the bolt 12 is tightened to ensure that the sealing ring gasket 15 is compressed to form an airtight connection;

[0046] The air pump 7 is started, the gas enters the inner cavity 6 of the positioning column 3 through the gas conveying pipe 8, and then is uniformly injected into the air bag 5 through the air hole. After the air bag 5 is inflated, the flexible protective layer 18 on the outer layer is attached to the inner wall of the balance bar ring, and uniform ring pressure is applied to avoid local stress damage to the workpiece surface. During this process, the pressure sensor 17 in the inner cavity 6 of the positioning column 3 monitors the air pressure in real time, and if the pressure is insufficient or exceeds the limit, an automatic feedback signal is sent to the air pump 7 to dynamically adjust the inflation amount, ensuring the stability of the clamping force;

[0047] In the stable clamping state of the air bag 5, welding operation is carried out. The balance bar is fixed firmly and has no deviation, and the welding precision is significantly improved;

[0048] After the welding is completed, the air pump 7 is closed and the pressure relief valve is opened, the air bag 5 is retracted and reset, the fixing of the balance bar is released, the bolt 12 of the quick release buckle 10 is loosened, the gas pipe 8 is removed, and the welded balance bar is taken off from the auxiliary table 2.

[0049] It should be understood by those skilled in the art that the above description and the embodiments of the utility model shown in the drawings are only examples and do not limit the utility model. The purpose of the utility model has been completely and effectively achieved. The function and structural principle of the utility model have been shown and explained in the embodiments, and the embodiments of the utility model can be any deformation or modification without departing from the principle.

Claims

1. A balance bar welding fixture structure characterized by, Include: Workbench (1), the workbench (1) is provided with an auxiliary table (2) for supporting the balance bar; Positioning column (3), two positioning columns (3) are provided, two positioning columns (3) are symmetrically provided on both sides of the auxiliary table (2), and the side surface of the positioning column (3) is provided with uniformly distributed fixing grooves (4); Air bag (5), the air bag (5) is embedded in the fixing groove (4), the inside of the positioning column (3) is provided with an inner cavity (6), and the inner side of the inner cavity (6) is provided with a ventilation hole communicated with the air bag (5); Air pump (7), the air pump (7) is fixedly provided on the workbench (1) and communicated with the top opening of the positioning column (3) through the air pipe (8); Wherein, the air bag (5) expands after inflation, and uniformly presses the two end rings of the balance bar to fix the workpiece.

2. The balanced bar welding fixture of claim 1, wherein: The connecting pipe (9) is fixedly arranged at the top opening of the positioning column (3), and the air pipe (8) is detachably connected with the connecting pipe (9) through the quick release buckle (10).

3. The balanced bar welding fixture of claim 2, wherein: The quick release buckle (10) includes symmetrically distributed arc-shaped clamping sleeves (11) and two groups of bolts (12), the connecting ends of the air pipe (8) and the connecting pipe (9) are fixedly provided with connecting plates (13), the arc-shaped clamping sleeves (11) are covered outside the connecting plates (13) and are fastened through the bolts (12).

4. The balanced bar welding fixture of claim 3, wherein: The contact surface of the connecting plate (13) is provided with an annular groove (14), and a sealing ring pad (15) is embedded in the annular groove (14).

5. The balanced bar welding fixture of claim 4, wherein: The material of the sealing ring pad (15) is rubber.

6. The balanced bar welding fixture of claim 1, wherein: The surface of the auxiliary table (2) is provided with anti-skid lines for increasing the friction between the balance bar and the auxiliary table (2).

7. The balanced bar welding fixture of claim 1, wherein: The inner cavity (6) of the positioning column (3) is provided with a pressure sensor (17), the pressure sensor (17) is electrically connected with the air pump (7), and the pressure inside the air bag (5) is adjusted in real time.

8. The balanced bar welding fixture of claim 1, wherein: The outer surface of the air bag (5) is covered with a flexible protective layer (18), and the material of the flexible protective layer (18) is polyurethane.

9. The balanced bar welding fixture of claim 1, wherein: The bottom of the workbench (1) is fixedly provided with an adjustable height supporting leg (16) for adapting to the levelness of different work planes.

10. The balanced bar welding fixture of claim 1, wherein: The air pipe (8) is a high-pressure resistant hose, and the surface thereof is covered with an anti-abrasion woven layer.

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