Semi-automatic die for repair welding of forklift gantry

Abstract

The utility model discloses a semi-automatic mould for repair welding of a forklift portal frame, which comprises a rotating mechanism, a supporting mechanism and a tensioning mechanism, the supporting mechanism is arranged on the rotating mechanism, the rotating mechanism drives the supporting mechanism to rotate coaxially, the tensioning mechanism is arranged on the supporting mechanism, and the tensioning mechanism is used for fixing the forklift portal frame. According to the semi-automatic mold for repair welding of the forklift portal, through the arrangement of the rotating mechanism and the supporting mechanism, rapid fixing and flexible overturning of the portal are achieved, repair welding operation can be conducted smoothly at different angles conveniently, the pause and adjustment time in the welding process is shortened, the pneumatic tensioning mechanism provides multi-direction clamping force, and the working efficiency is improved. According to the forklift portal frame welding die, accurate positioning of a portal frame in the welding process is guaranteed, the consistency and stability of welding quality are improved, a portal frame overturning frame is adopted in the design of the supporting mechanism, the supporting mechanism is connected with a positioner through a tail shaft, the forklift portal frame welding die can adapt to forklift portal frames of different specifications and models, and the die has the wide application range.

Description

Technical Field

[0001] This utility model relates to the field of industrial manufacturing technology, specifically to a semi-automatic mold for welding repairs on forklift masts. Background Technology

[0002] In industrial manufacturing, the forklift mast, as a crucial load-bearing and moving component, directly impacts the forklift's safety performance and service life due to its structural strength and stability. However, due to frequent use and complex working environments, forklift masts are often damaged by wear, impact, or long-term stress concentration, especially fatigue cracks or weld detachment at welded areas. Traditional welding repair methods, relying primarily on manual operation of welding tools, have the following drawbacks: manual welding requires a long operation time, demands a high level of skill when handling complex structures, and makes it difficult to consistently control process quality; mast positioning and clamping during manual welding typically use simple tools, making it difficult to achieve high-precision welding positioning, resulting in decreased dimensional accuracy or significant deviations in the welded components; traditional methods require workers to manually operate welding equipment for extended periods, which is not only labor-intensive but also poses health risks due to high temperatures and welding fumes; manual operation during workpiece rotation or flipping presents safety hazards such as pinching and slippage, especially when handling large masts.

[0003] To address these issues, existing technologies attempt to introduce semi-automated welding molds, using pneumatic clamps and a flipping mechanism to achieve efficient fixing and welding of the gantry. However, these solutions still have room for improvement in terms of versatility, reliability, and production efficiency. For example, the lack of adaptability design for different gantry specifications limits the range of equipment use; insufficient synchronization between the flipping mechanism and clamping device leads to poor workpiece stability; and loading and unloading operations still require considerable manual intervention, preventing full automation. Utility Model Content

[0004] The purpose of this invention is to provide a semi-automatic mold for welding repairs on forklift masts, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a semi-automatic mold for welding repairs on forklift masts, comprising:

[0006] Rotating mechanism;

[0007] A support mechanism is mounted on a rotating mechanism, which drives the support mechanism to rotate coaxially.

[0008] A tensioning mechanism is mounted on a support mechanism and is used to secure the forklift mast.

[0009] Preferably, it also includes a conveying mechanism disposed below the support mechanism, the conveying mechanism comprising two horizontally arranged rails on which a trolley assembly is slidably disposed.

[0010] Preferably, the rotating mechanism includes a positioner, and a tail shaft bracket is provided on one side of the positioner, with a tail shaft fixedly connected to the top of the tail shaft bracket.

[0011] Preferably, the support mechanism includes a gantry tilting frame, one end of which is rotatably connected to the tail shaft, and the other end of which is connected to the positioner.

[0012] Preferably, the tensioning mechanism includes a horizontally arranged base plate, which is fixedly connected to the gantry tilting frame. A fixing block is fixedly connected to the top of the base plate. A groove is opened on the top of the fixing block. A horizontally arranged telescopic cylinder is fixed inside the fixing block. A clamp is fixedly connected to both ends of the telescopic cylinder. The bottom of the clamp is slidably connected to the top of the fixing block.

[0013] Preferably, the track is located below the gantry tilting frame.

[0014] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0015] This semi-automatic mold for forklift mast repair welding utilizes a rotating and supporting mechanism to achieve rapid fixing and flexible tilting of the mast. This facilitates smooth welding operations at different angles, reducing downtime and adjustment time during the welding process. A pneumatic tensioning mechanism provides multi-directional clamping force, ensuring precise mast positioning during welding and improving the consistency and stability of weld quality. The supporting mechanism employs a mast tilting frame connected to a positioner via a tail shaft, making it adaptable to different specifications and models of forklift masts, thus broadening the mold's applicability. A telescopic cylinder drives the clamps for multi-point mast clamping, stably fixing workpieces of different shapes and sizes. The pneumatically driven tensioning mechanism eliminates the complex manual adjustment of the clamping device, significantly reducing worker workload. The rotating mechanism is integrated with the trolley assembly. The coordinated design automates the gantry welding and demolding process, reducing the risk of worker injuries such as pinching or slipping during loading and unloading. The track and trolley assembly work together to automate gantry transport and demolding. The streamlined production process improves equipment efficiency and the continuity of welding operations. The gantry tilting frame simplifies the tailstock design and optimizes the overall height, ensuring good passage for the gantry when entering the mold and saving transport time in previous processes. The pneumatic clamp module uses synchronous cylinders, reducing the need for additional positioning devices, lowering manufacturing costs, simplifying equipment structure, and improving system reliability. The structural design of key components such as the base plate, fixing blocks, and clamps ensures the stability of the gantry during welding, while facilitating maintenance and replacement, extending equipment lifespan. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the tensioning mechanism of this utility model;

[0018] Figure 3 This is a schematic diagram of the operation of this utility model.

[0019] In the diagram: 1. Rotating mechanism; 11. Positioner; 12. Tail shaft bracket; 13. Tail shaft; 2. Support mechanism; 21. Gantry tilting frame; 3. Tensioning mechanism; 31. Base plate; 32. Fixing block; 33. Telescopic cylinder; 34. Clamp; 4. Conveying mechanism; 41. Track; 42. Trolley assembly. Detailed Implementation

[0020] 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.

[0021] like Figures 1-3 As shown, a semi-automatic mold for welding repairs on forklift masts includes a rotating mechanism 1, a supporting mechanism 2, and a tensioning mechanism 3. The rotating mechanism 1 drives the supporting mechanism 2 to rotate coaxially. The supporting mechanism 2 is mounted on the rotating mechanism 1, and the tensioning mechanism 3 is mounted on the supporting mechanism 2 to fix the forklift mast.

[0022] The mold uses a rotating mechanism 1 to drive the rotation of the support mechanism 2, which in turn drives the tensioning mechanism 3 to rotate synchronously with the fixed forklift mast. This allows for adjustment of the mast's position and angle during welding, improving welding flexibility and ease of operation. The tensioning mechanism 3 is designed to firmly secure the forklift mast, preventing displacement or loosening during welding. This design significantly improves the efficiency and quality of mast repair welding. The introduction of the rotating mechanism 1 allows for more precise mast adjustment, and the cooperation between the support mechanism 2 and the tensioning mechanism 3 ensures mast stability, effectively reducing the workload and errors associated with manual adjustments.

[0023] The rotating mechanism 1 can employ different types of rotating drive devices, such as hydraulic rotating devices or electric servo mechanisms, to adapt to different application requirements. The fixing method of the tensioning mechanism 3 can also be adjusted; for example, a hydraulic clamp can be used instead of a pneumatic clamp to meet the clamping requirements of specific scenarios.

[0024] The mold also includes a conveying mechanism 4 located below the support mechanism 2. The conveying mechanism 4 comprises two horizontally arranged rails 41, on which a trolley assembly 42 slides. Through the coordinated action of the rails 41 and the trolley assembly 42, the conveying mechanism 4 can move the mold to different working areas, facilitating loading and unloading operations of the gantry. The trolley assembly 42 can slide freely along the rails 41 and lock into a fixed position when needed, ensuring the stability of the mold. The addition of the conveying mechanism 4 greatly improves the operational flexibility of the mold, allowing it to move freely within the working area, reducing the labor intensity of operators and improving overall production efficiency.

[0025] The track 41 can be made of different materials or have different structural designs, such as steel slide rails or aluminum alloy guide rails, to meet different environmental conditions. The trolley assembly 42 can increase the number of rollers or improve the sliding method as needed to adapt to greater loads or complex working conditions.

[0026] The rotating mechanism 1 includes a positioner 11, with a tail shaft bracket 12 mounted on one side of the positioner 11. A tail shaft 13 is fixedly connected to the top of the tail shaft bracket 12. The positioner 11 provides power to rotate the tail shaft 13 around its axis. The design of the tail shaft bracket 12 ensures the installation stability of the tail shaft 13 and reduces mechanical vibration during rotation, thereby improving the smoothness of mold operation. Through the combination of the positioner 11 and the tail shaft bracket 12, the rotation of the mold is more stable and efficient, the adjustment accuracy of the gantry is improved, and the stability and consistency of the welding process are further optimized.

[0027] The tail shaft bracket 12 can adopt different structural forms, such as frame type or column type, to adapt to different spaces and installation conditions. The power source of the positioner 11 can be replaced with electric motor drive or hydraulic drive to meet special usage requirements.

[0028] The support mechanism 2 includes a gantry tilting frame 21, one end of which is rotatably connected to the tail shaft 13, and the other end is connected to the positioner 11. As the main support structure, the gantry tilting frame 21 is connected at one end to the tail shaft bracket 12 via the tail shaft 13, and the other end is fixed to the positioner 11. During rotation, the gantry tilting frame 21 provides stable support and simultaneously enables the smooth tilting of the gantry. The addition of the gantry tilting frame 21 improves the overall rigidity of the mold, preventing deformation or wobbling of the gantry under stress during welding operations, thereby improving the quality and consistency of the welding.

[0029] The gantry tilting frame 21 can be made of high-strength steel or composite materials to balance strength and weight requirements. The connection method can also be adjusted, such as using ball joints or quick-release structures, to facilitate equipment maintenance and installation.

[0030] The tensioning mechanism 3 includes a horizontally positioned base plate 31, which is fixedly connected to the gantry tilting frame 21. A fixing block 32 is fixedly connected to the top of the base plate 31. The top of the fixing block 32 has a groove, and a horizontally positioned telescopic cylinder 33 is fixedly installed inside the fixing block 32. A clamp 34 is fixedly connected to both ends of the telescopic cylinder 33, and the bottom of the clamp 34 is slidably connected to the top of the fixing block 32. Under the action of a control signal, the telescopic cylinder 33 drives the clamp 34 to clamp or release the gantry. The groove design of the fixing block 32 provides guiding support for the sliding of the clamp 34, ensuring smooth and precise clamping action. This structure can quickly and firmly fix the gantry, and the telescopic cylinder 33 provides reliable power support. At the same time, the design is simple and easy to maintain, which helps to improve the overall practicality and durability of the mold.

[0031] The telescopic cylinder 33 can be replaced with an electric push rod or a hydraulic cylinder, and the clamp 34 can be made of high-temperature resistant rubber or metal to meet the requirements of different environments.

[0032] Track 41 is positioned below the gantry tilting frame 21. By positioning track 41 below the gantry tilting frame 21, the conveying mechanism 4 remains parallel to the ground when the mold is tilted as a whole, thus ensuring the stability of the trolley assembly 42 during sliding. This design optimizes the spatial fit between the conveying mechanism 4 and the gantry tilting frame 21, ensuring the mold remains stable during rotation and movement, and avoiding safety hazards caused by track displacement.

[0033] The track 41 can be suspended or recessed to adapt to different installation environments. The material and surface treatment of the track can be adjusted according to usage requirements, such as using anti-corrosion coatings or high-hardness steel.

[0034] Work Process: Before starting the welding repair, the operator needs to complete the installation and debugging of the mold, including the installation and functional checks of the rotating mechanism 1, support mechanism 2, tensioning mechanism 3, and conveying mechanism 4, to ensure that each component is operating normally. The positioner 11 drives the tail shaft bracket 12 to connect with the tail shaft 13, ensuring the normal rotation function of the positioner 11. The gantry tilting frame 21 is installed, ensuring it is firmly connected to the tail shaft 13 and the positioner 11. The operating status of the base plate 31, fixing block 32, telescopic cylinder 33, and clamp 34 is checked to confirm that the clamping force meets the fixing requirements. The installation position of the track 41 and the gantry tilting frame 21 is ensured, and the trolley assembly 42 is checked for smooth sliding and accurate positioning.

[0035] The forklift mast requiring welding is loaded onto the mold as follows: The sliding trolley assembly 42 moves the mold along the track 41 to a suitable loading position via the conveying mechanism 4. The mast is placed in the top groove of the fixing block 32 of the tensioning mechanism 3, aligning the lower part of the mast with the base plate 31. The telescopic cylinder 33 is activated, driving the clamp 34 to clamp the mast, ensuring it is securely fixed. The angle and position of the mast are adjusted as needed, and the mast tilting frame 21 is driven by the positioner 11 via the rotating mechanism 1 to ensure the mast welding position is at the optimal welding angle.

[0036] The welding operation is performed according to a predetermined procedure, with the following specific steps: The tilting angle of the gantry tilting frame 21 is adjusted by the positioner 11, while the tail shaft 13 supports the other end of the gantry tilting frame 21 to ensure accurate positioning. Operators or robots weld the gantry according to the welding path. During the welding process, if a deviation in the gantry position is found or adjustment is needed, the angle is adjusted by operating the rotating mechanism 1, or the gantry is re-secured by the tensioning mechanism 3.

[0037] After welding is completed, the welded gantry is unloaded from the mold: the telescopic cylinder 33 is retracted, the clamp 34 is released, and the gantry is released from the slot at the top of the fixed block 32. The trolley assembly 42 of the sliding conveyor mechanism 4 moves the mold to the unloading position. The operator removes the welded gantry from the tensioning mechanism 3.

[0038] After completing the welding repair operation, the mold is reset and maintained: the gantry tilting frame 21 is restored to its initial position using the rotating mechanism 1 to ensure that all parts of the mold are in an unloaded state. Metal spatter generated during the welding process is cleaned up, and the positioner 11, tail shaft 13, telescopic cylinder 33, track 41, and other components are inspected for wear or looseness, and vulnerable parts are replaced as needed.

[0039] The entire working process utilizes the coordinated action of the rotating mechanism 1, the supporting mechanism 2, the tensioning mechanism 3, and the conveying mechanism 4 to achieve efficient and precise operation of the gantry welding. Through the rotational cooperation of the positioner 11 and the tail shaft bracket 12, the gantry tilting frame 21 stably supports the gantry, the tensioning mechanism 3 effectively fixes the workpiece, and the conveying mechanism 4 improves the mobility and ease of operation of the equipment.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A semi-automatic die for forklift mast repair welding, characterized in that, Include: Rotary mechanism (1); Support mechanism (2) is arranged on the rotary mechanism (1), the rotary mechanism (1) drives support mechanism (2) coaxial rotation; Tension mechanism (3) is arranged on the support mechanism (2), and the tension mechanism (3) is used for fixing the forklift mast.

2. The semi-automatic die for the repair welding of a forklift mast according to claim 1, characterized in that, It also includes a conveying mechanism (4) arranged below the support mechanism (2), the conveying mechanism (4) includes two horizontally arranged tracks (41), and a trolley assembly (42) is slidably arranged on the track (41).

3. The semi-automatic die for fork truck mast repair welding of claim 2, wherein: The rotary mechanism (1) includes a positioner (11), a shaft support (12) is arranged outside the positioner (11), and a shaft (13) is fixedly connected to the top of the shaft support (12).

4. The semi-automatic die for forklift mast repair welding according to claim 3, characterized in that: The support mechanism (2) includes a gantry turnover frame (21), one end of the gantry turnover frame (21) is rotatably connected with the shaft (13), and the other end of the gantry turnover frame (21) is connected with the positioner (11).

5. The semi-automatic die for fork truck mast repair welding of claim 4, wherein: The tension mechanism (3) includes a horizontally arranged bottom plate (31), the bottom plate (31) is fixedly connected with the gantry turnover frame (21), a fixed block (32) is fixedly connected to the top of the bottom plate (31), a slot is formed in the top of the fixed block (32), a horizontally arranged telescopic air cylinder (33) is fixedly arranged in the fixed block (32), a clamp (34) is fixedly connected to each end of the telescopic air cylinder (33), and the bottom of the clamp (34) is slidably connected with the top of the fixed block (32).

6. The semi-automatic die for fork truck mast repair welding of claim 4, wherein: The track (41) is arranged below the gantry turnover frame (21).

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