A chair frame welding fixture
By using limiting holes, slots, and locking components in the chair frame welding fixture to precisely limit the chair legs and connecting beams, the problems of positioning accuracy and clamping stability are solved, achieving an efficient and stable welding process and improving the quality and production efficiency of the chair frame.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN CHONG YA FURNITURE CO LTD
- Filing Date
- 2025-08-29
- Publication Date
- 2026-07-31
AI Technical Summary
Existing chair frame welding fixtures suffer from insufficient positioning accuracy and poor clamping stability, resulting in poor welding quality and low efficiency.
Design a welding fixture that includes a base, support column and crossbeam. Use limiting holes, limiting grooves and limiting locking parts to precisely limit and clamp the chair legs and connecting beams to ensure that the components do not shift or shake during the welding process.
It improves the positioning accuracy and clamping stability of the chair frame, ensures the consistency of dimensions after welding, enhances the overall strength of the chair frame, and significantly improves welding efficiency and reduces production costs.
Smart Images
Figure CN224575004U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding fixture technology, and in particular to a chair frame welding fixture. Background Technology
[0002] Welding is a crucial process in the manufacturing of chair frames, as its quality directly affects the structural strength and lifespan of the frame. However, current chair frame welding operations commonly suffer from insufficient positioning accuracy and poor clamping stability.
[0003] Specifically, chair frames typically consist of multiple legs and connecting beams, which require precise alignment and fixation during welding. However, existing tooling often struggles to provide comprehensive and reliable positioning of the legs and connecting beams, leading to component misalignment and wobbling during welding. The legs may tilt due to the lack of stable positioning structures, and the alignment of the connecting beams with the legs can easily deviate. This not only results in the welded chair frame dimensions not meeting design requirements and affecting product consistency, but may also cause quality defects such as cracks due to uneven welding stress distribution, reducing the overall strength of the chair frame.
[0004] Furthermore, due to unreliable clamping, operators need to spend a considerable amount of time adjusting the position of components during welding, which undoubtedly reduces welding efficiency and increases production costs. Therefore, how to provide a tooling that can accurately and stably limit and clamp the chair legs and connecting beams of the chair frame to improve welding quality and efficiency has become a pressing technical problem to be solved in the current chair frame manufacturing industry.
[0005] It is evident that existing technologies still need improvement and enhancement. Utility Model Content
[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a chair frame welding fixture, which aims to solve the technical problems of insufficient positioning accuracy and poor clamping stability that are common in the prior art.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] A chair frame welding fixture, comprising a base, four pillars and two crossbeams;
[0009] Limiting holes are provided at the four corners of the base, and four pillars are fixedly connected to the four corners of the base, with each pillar adjacent to the limiting hole at its respective corner.
[0010] The two crossbeams are connected at an intersection, and the two ends of the crossbeams are fixedly connected to two diagonally placed support columns respectively;
[0011] Several limiting grooves and several limiting locking parts are provided on both the support column and the crossbeam;
[0012] The limiting holes and limiting grooves on the support columns work together with the limiting locking components to limit and clamp the chair legs of the chair frame; the limiting grooves on the crossbeams work together with the limiting locking components to limit and clamp the connecting beams of the chair frame.
[0013] The chair frame welding fixture includes a limiting groove and a limiting locking member on each support column. The limiting groove is located on the outer side of the upper end of the support column and is used to accommodate the chair legs of the chair frame. The limiting locking member is located on the outer side of the middle part of the support column and is used to limit the chair legs of the chair frame within the limiting groove.
[0014] The chair frame welding fixture includes four pillars, including two first pillars and two second pillars. The two first pillars are arranged adjacent to each other, and the two second pillars are arranged adjacent to each other. The distance between a first pillar and its adjacent limiting hole is greater than the distance between a second pillar and its adjacent limiting hole.
[0015] The chair frame welding fixture includes two crossbeams, a first crossbeam and a second crossbeam. The two ends of the first crossbeam are respectively connected to the upper ends of one first support column and one second support column, and the two ends of the second crossbeam are respectively connected to the upper ends of another first support column and another second support column.
[0016] The chair frame welding fixture includes two limiting grooves on the first crossbeam, which are located at both ends of the first crossbeam; and one limiting locking member on the first crossbeam, which is located at one end of the first crossbeam and between a limiting groove and the second crossbeam.
[0017] The chair frame welding fixture includes four limiting grooves on the second crossbeam, with each of the four limiting grooves located in pairs on both sides of the first crossbeam; and two limiting locking members on the second crossbeam, with each limiting locking member located on both sides of the first crossbeam, and each limiting locking member located between the two limiting grooves on the same side.
[0018] The chair frame welding fixture includes a limiting locking component comprising a screw and a pressure rod. The screw is fixedly connected to the support column or crossbeam, and one end of the pressure rod is fixedly connected to a nut and threadedly fitted onto the screw.
[0019] Beneficial effects:
[0020] This utility model provides a chair frame welding fixture, including a base, four support columns, and two crossbeams. The base has limiting holes, and the support columns and crossbeams have limiting grooves and locking devices. Regarding positioning accuracy, the limiting holes at the four corners of the base, together with the limiting grooves and locking devices on the support columns, work together to clamp and limit the chair legs from different dimensions, preventing tilting or offset during welding and ensuring that the installation position of the chair legs meets design requirements. Simultaneously, the limiting grooves and locking devices on the crossbeams limit the connecting beams, accurately fixing the docking position between the connecting beams and the chair legs, reducing positional deviations of the connecting beams, significantly improving the positioning accuracy of each component of the chair frame, and ensuring the consistency of the chair frame dimensions after welding. Regarding clamping stability, several limiting grooves and locking components are installed on both the support column and the crossbeam. The combined effect of these multiple limiting structures provides a stable constraint on the chair legs and connecting beams, preventing components from shaking during welding due to external forces or welding vibrations. This enhances clamping stability, thereby avoiding uneven stress distribution caused by component movement, reducing quality defects such as cracks, and improving the overall strength of the chair frame. In terms of welding efficiency, because this fixture can quickly and accurately limit and securely clamp the chair legs and connecting beams, operators do not need to spend a lot of time adjusting component positions and can directly perform welding operations. This significantly shortens preparation time, improves welding efficiency, and reduces production costs. Attached Figure Description
[0021] Figure 1 A three-dimensional structural diagram of the chair frame welding fixture provided by this utility model in use;
[0022] Figure 2 A three-dimensional structural diagram of the chair frame welding fixture provided by this utility model.
[0023] Figure label:
[0024] 1—Base; 2—Limiting groove; 3—Limiting locking component
[0025] 4—First pillar; 5—Second pillar; 6—First crossbeam
[0026] 7—Second crossbeam; 8—Chair frame; 11—Limiting hole
[0027] 31—Screw; 32—Pressure rod; 33—Nut. Detailed Implementation
[0028] This utility model provides a chair frame welding fixture. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0029] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.
[0030] In this embodiment, the chair frame 8 includes four chair legs and two connecting beams. The four chair legs connect and support the two connecting beams, and the chair seat is fixed to the connecting beams with screws. To ensure that the mounting surface of the chair seat on the connecting beams remains flat, one of the connecting beams needs to adopt a segmented structure. The two segments of this segmented crossbeam are located on both sides of the integral crossbeam and are aligned on a straight line. The four chair legs include two front legs and two rear legs. The angle between the front legs and the connecting beams is greater than 90°, and the angle between the rear legs and the connecting beams is equal to 90°.
[0031] Please see Figures 1 to 2 As shown, this utility model provides a chair frame welding fixture, including a base 1, four pillars and two crossbeams. In this embodiment, the base 1 is formed by welding four profiles to form a rectangular frame. The four pillars and two crossbeams are all fixedly connected by welding the profiles. The height of the pillars is less than the height of the chair legs, and the length of the crossbeams is less than the length of the connecting beams, so as to ensure that the clamped chair legs and the welding points of the connecting beams can contact each other.
[0032] Limiting holes 11 are provided at the four corners of the base 1. Four pillars are fixedly connected to the four corners of the base 1, and each pillar is adjacent to the limiting hole 11 at its respective corner. In this embodiment, the limiting hole 11 is a circular hole and is recessed from the top surface of the base 1. The limiting hole 11 is closer to the outside of the base 1 than the pillar. The lower ends of the four pillars are welded to the four corners of the base 1.
[0033] Two crossbeams are connected at an intersection, and the two ends of the crossbeams are fixedly connected to two diagonally arranged pillars respectively. In this embodiment, the two crossbeams are perpendicular to each other, and the intersection point is not necessarily at the midpoint of the length of the crossbeams. The top surfaces of the two crossbeams are level to ensure the flatness of the clamping of the connecting beam of the chair frame 8, thereby improving the welding accuracy.
[0034] The support column and the crossbeam are provided with several limiting grooves 2 and several limiting locking parts 3. In this embodiment, the several limiting grooves 2 are fixed to the support column and the crossbeam respectively by welding, and the several limiting locking parts 3 are also fixed to the support column and the crossbeam respectively by welding.
[0035] The limiting hole 11, the limiting groove 2 on the support column, and the limiting locking part 3 work together to limit and clamp the chair legs of the chair frame 8; the limiting groove 2 on the crossbeam and the limiting locking part 3 work together to limit and clamp the connecting beam of the chair frame 8.
[0036] In actual processing, the two ends of each connecting beam are respectively installed in the corresponding limiting grooves 2 on the two crossbeams, and are pressed and fixed by the limiting locking parts 3 on the crossbeams. One end of the chair leg is inserted into the limiting hole 11, and the other end of the chair leg is installed in the limiting groove 2 on the support column, and is pressed and fixed by the limiting locking parts 3 on the support column. The clamped chair legs and the welding positions of the connecting beams have all made contact. After all the chair legs and connecting beams are clamped, the outer side of the connection between the chair legs and the connecting beams can be welded. After the outer side welding is completed, the chair frame 8, which has taken shape, is removed from the tooling. Then, with the chair legs facing upward, the connecting beams are re-clamped onto the crossbeams. After clamping, the inner side of the connection between the chair legs and the connecting beams can be welded, thereby completing the overall welding process of the chair frame 8.
[0037] In terms of positioning accuracy, the limiting holes 11 at the four corners of the base 1 work together with the limiting grooves 2 and limiting locking parts 3 on the support column to limit and clamp the chair legs from different dimensions, preventing the chair legs from tilting or shifting during welding and ensuring that the installation position of the chair legs meets the design requirements. At the same time, the limiting grooves 2 and limiting locking parts 3 on the crossbeam limit the connecting beam, which can accurately fix the docking position of the connecting beam and the chair legs, reduce the position deviation of the connecting beam, and greatly improve the positioning accuracy of each component of the chair frame 8, ensuring the consistency of the dimensions of the chair frame 8 after welding.
[0038] In terms of clamping stability, several limiting grooves 2 and limiting locking parts 3 are set on the support column and crossbeam. The multiple sets of limiting structures work together to form a stable constraint on the chair legs and connecting beams, preventing the parts from shaking due to external forces or welding vibrations during the welding process. This enhances the stability of the clamping, thereby avoiding uneven distribution of welding stress caused by the shaking of the parts, reducing the generation of quality defects such as cracks, and improving the overall strength of the chair frame 8.
[0039] In terms of welding efficiency, because the fixture can quickly and accurately limit and securely clamp the chair legs and connecting beams, operators do not need to spend a lot of time adjusting the position of the parts and can directly carry out welding operations, which significantly shortens the preparation time, improves welding efficiency, and reduces production costs.
[0040] Please see Figures 1 to 2As shown, each support column has one limiting groove 2 and one limiting locking member 3. The limiting groove 2 is located on the outer upper end of the support column and is used to accommodate the chair legs of the chair frame 8. The limiting locking member 3 is located on the outer middle part of the support column and is used to limit the chair legs of the chair frame 8 within the limiting groove 2. In this embodiment, the limiting groove 2 on the support column is a U-shaped groove adapted to cylindrical chair legs. The limiting groove 2 and the limiting hole 11 limit the two ends of the chair legs respectively. Then, the limiting locking member 3 limits and fixes the chair legs from the middle part of the chair legs in the opposite direction to the limiting groove 2, so that the chair legs are stably limited on the outer side of the support column, and the upper end is higher than the top surface of the support column or even the crossbeam, so as to reserve the welding surface to contact the connecting beam.
[0041] Please see Figures 1 to 2 As shown, the four pillars include two first pillars 4 and two second pillars 5. The two first pillars 4 are arranged adjacent to each other, and the two second pillars 5 are arranged adjacent to each other. The distance between a first pillar 4 and its adjacent limiting hole 11 is greater than the distance between a second pillar 5 and its adjacent limiting hole 11. In this embodiment, the distance between a first pillar 4 and its adjacent limiting hole 11 is greater than the depth of the limiting groove 2 on the first pillar 4, so that the chair leg clamped thereon is at an inclined angle. The two first pillars 4 are used to clamp the two front legs of the chair frame 8. The distance between a second pillar 5 and its adjacent limiting hole 11 is equal to the depth of the limiting groove 2 on the second pillar 5, so that the chair leg clamped thereon is perpendicular to the horizontal plane. The two second pillars 5 are used to clamp the two rear legs of the chair frame 8.
[0042] Please see Figures 1 to 2 As shown, the two crossbeams include a first crossbeam 6 and a second crossbeam 7. The two ends of the first crossbeam 6 are respectively connected to the upper ends of one of the first pillars 4 and one of the second pillars 5, and the two ends of the second crossbeam 7 are respectively connected to the upper ends of the other first pillar 4 and the other second pillar 5. In this embodiment, the first crossbeam 6 is a single integral beam, and the second crossbeam 7 is composed of two segmented beams. The two segments of the second crossbeam 7 are respectively welded to both sides of the first crossbeam 6, so that the top surfaces of the first crossbeam 6 and the second crossbeam 7 are kept at the same level, ensuring precise clamping of the chair frame 8.
[0043] Please see Figures 1 to 2 As shown, there are two limiting grooves 2 on the first crossbeam 6, located at both ends of the first crossbeam 6 respectively; there is one limiting locking member 3 on the first crossbeam 6, located at one end of the first crossbeam 6 and between one limiting groove 2 and the second crossbeam 7. In this embodiment, the limiting groove 2 on the first crossbeam 6 is a U-shaped groove adapted to the square connecting beam. The two limiting grooves 2 respectively limit and accommodate both ends of a connecting beam, and the limiting locking member 3 provides downward limiting and pressing at the middle of the connecting beam, so that the connecting beam is stably limited on the first crossbeam 6.
[0044] Please see Figures 1 to 2As shown, there are four limiting grooves 2 on the second crossbeam 7, with each of the four limiting grooves 2 located in pairs on both sides of the first crossbeam 6; there are two limiting locking members 3 on the second crossbeam 7, with each limiting locking member 3 located on both sides of the first crossbeam 6, and each limiting locking member 3 located between the two limiting grooves 2 on the same side. In this embodiment, the limiting grooves 2 on the second crossbeam 7 are U-shaped grooves adapted to the square connecting beam. The four limiting grooves 2 respectively accommodate and limit the ends of the two connecting beams, and then the two limiting locking members 3 respectively limit and press downward in the middle of the two connecting beams, so that the two connecting beams are stably limited on the second crossbeam 7.
[0045] The setting of the limiting groove 2 ensures that the chair legs are not close to the support column and the connecting beam is not close to the cross beam, so that the welding joint between the chair legs and the connecting beam is suspended, thereby preventing the chair frame 8 from being welded together with the tooling during the welding process.
[0046] Please see Figures 1 to 2 As shown, the limiting locking component 3 includes a screw 31 and a pressure rod 32. The screw 31 is fixedly connected to the support column or crossbeam, and one end of the pressure rod 32 is fixedly connected to a nut 33, which is threaded onto the screw 31. In this embodiment, the screw 31 of the limiting locking component 3 on the support column is vertically welded to the side of the support column, and the screw 31 of the limiting locking component 3 on the crossbeam is vertically welded to the side of the crossbeam. The pressure rod 32 and the nut 33 are fixed together by welding, and the pressure rod 32 is threaded onto the screw 31 through the nut 33. By turning the pressure rod 32, the tightness of the pressure rod 32 on the chair frame 8 can be adjusted.
[0047] In summary, this utility model uses the limiting holes 11 of the base 1, the limiting grooves 2 of the support column, and the locking components to collaboratively limit the chair legs, preventing tilting and displacement. The limiting structure of the crossbeam fixes the connection position between the beam and the chair legs, reducing deviation and ensuring the dimensional consistency of the chair frame 8. The multiple sets of limiting grooves 2 of the support column and crossbeam, together with the locking components, form a stable constraint, preventing components from shaking due to external forces or vibrations, avoiding defects such as uneven welding stress and cracks, and improving the strength of the chair frame 8. The tooling allows for quick and precise limiting and clamping, reducing operator adjustment time, enabling direct welding, shortening preparation time, improving efficiency, and reducing costs.
[0048] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of the appended claims of this utility model.
Claims
1. A chair frame welding fixture, characterized by, Includes a base (1), four pillars and two crossbeams; Limiting holes (11) are provided at the four corners of the base (1), and four pillars are fixedly connected to the four corners of the base (1), with each pillar adjacent to the limiting hole (11) at its respective corner. The two crossbeams are connected at an intersection, and the two ends of the crossbeams are fixedly connected to two diagonally placed support columns respectively; Several limiting grooves (2) and several limiting locking parts (3) are provided on the support column and the crossbeam; among them, the limiting hole (11), the limiting groove (2) on the support column and the limiting locking part (3) cooperate to limit and clamp the chair legs of the chair frame (8); the limiting groove (2) on the crossbeam and the limiting locking part (3) cooperate to limit and clamp the connecting beam of the chair frame (8).
2. The chair frame welding fixture of claim 1, wherein Each support column has a limiting groove (2) and a limiting locking member (3). The limiting groove (2) is located on the outer side of the upper end of the support column and is used to accommodate the chair legs of the chair frame (8). The limiting locking member (3) is located on the outer side of the middle part of the support column and is used to limit the chair legs of the chair frame (8) within the limiting groove (2).
3. The chair frame welding fixture of claim 2, wherein The four pillars include two first pillars (4) and two second pillars (5). The two first pillars (4) are arranged adjacent to each other, and the two second pillars (5) are arranged adjacent to each other. The distance between the first pillar (4) and its adjacent limiting hole (11) is greater than the distance between the second pillar (5) and its adjacent limiting hole (11).
4. The chair frame welding fixture of claim 3, wherein The two crossbeams include a first crossbeam (6) and a second crossbeam (7). The two ends of the first crossbeam (6) are respectively connected to the upper ends of one of the first pillars (4) and one of the second pillars (5), and the two ends of the second crossbeam (7) are respectively connected to the upper ends of another first pillar (4) and another second pillar (5).
5. The chair frame welding fixture of claim 4, wherein, There are two limiting grooves (2) on the first crossbeam (6), and the two limiting grooves (2) are located at both ends of the first crossbeam (6); there is one limiting locking member (3) on the first crossbeam (6), which is located at one end of the first crossbeam (6) and between a limiting groove (2) and the second crossbeam (7).
6. The chair frame welding fixture of claim 5, wherein, There are four limiting grooves (2) on the second crossbeam (7), and the four limiting grooves (2) are located on both sides of the first crossbeam (6) in pairs; there are two limiting locking parts (3) on the second crossbeam (7), and the two limiting locking parts (3) are located on both sides of the first crossbeam (6), and each limiting locking part (3) is located between the two limiting grooves (2) on the same side.
7. The chair frame welding fixture of claim 1, wherein The limiting locking component (3) includes a screw (31) and a pressure rod (32). The screw (31) is fixedly connected to the support column or crossbeam. One end of the pressure rod (32) is fixedly connected to a nut (33) and threadedly fitted onto the screw (31) through the nut (33).