An automatic welding clamping tool for circulating fan frame

Abstract

This application relates to an automatic welding and clamping fixture for circulating fan frames, belonging to the field of machining and clamping technology. It includes a connecting component and a four-jaw fixed chuck. The connecting component is coaxially fixedly connected to a positioner and the four-jaw fixed chuck on both sides. A cross guide rail is staggered vertically on the side of the four-jaw fixed chuck facing away from the positioner, and a bidirectional lead screw is rotatably mounted within the cross guide rail. Each end of the bidirectional lead screw has a slider that forms an embedded sliding engagement with the cross guide rail. The side of each slider near the bidirectional lead screw forms a threaded engagement with the lead screw. A clamping assembly is fixedly connected to the side of each slider facing away from the lead screw, and the clamping assembly forms a clamping engagement with the frame. This application improves the applicability and accuracy of the welding fixture for circulating fan frames.

Description

Technical Field

[0001] This application relates to the field of machining and clamping technology, and in particular to an automatic welding and clamping fixture for a circulating fan frame. Background Technology

[0002] Circulating fans belong to the field of mechanical ventilation and are mainly used in industrial hot air circulating ovens, widely applied in food processing, chemical, coating, and painting industries. In the production processes of these industries, circulating fans play a crucial role, promoting air circulation and ensuring a stable production environment and reliable product quality. With the continuous improvement of industrial automation, the requirements for the production efficiency and quality of circulating fans are also increasing. As the load-bearing and mounting components, the quality and precision of the circulating fan frame directly affect the operational stability and service life of the fan. Therefore, how to efficiently and accurately manufacture circulating fan frames has become an important research direction in the field of mechanical design and manufacturing.

[0003] In previous production processes, the commonly used tooling to solve the problem of welding and clamping the circulating fan frame mainly included connectors, base plates, backing plates, and clamps. During production, the operator would first place the frame on the base plate, then place the three sides of the frame mounting panel against the backing plate, and finally use clamps to press the frame mounting panel down from all four sides, thereby achieving the clamping and fixing of the frame and the positioner.

[0004] However, the existing tooling has several obvious drawbacks. First, it is not universally applicable to mounting panels of different sizes. When changing to a different size product, the position of the backing plate must be altered, which not only increases production preparation time but also reduces production efficiency. Second, the tooling is only suitable for frames with square or rectangular mounting panels, making its applicability too narrow and unable to meet diverse production needs. Furthermore, product installation relies on manual alignment of the frame and backing plate. Due to individual differences and varying operating habits among operators, operational errors are inevitable, causing the product to deviate from the concentricity of the positioner's mounting plate. If the frame's positional deviation exceeds the allowable range of the robot welding's final vision system, it will severely affect the subsequent robot welding quality and may even lead to product scrapping, indicating areas for improvement. Utility Model Content

[0005] To address the issues of low applicability and accuracy of traditional circulating fan frame welding fixtures, this application provides an automatic welding and clamping fixture for circulating fan frames.

[0006] This application provides an automatic welding and clamping fixture for a circulating fan frame, which adopts the following technical solution:

[0007] An automatic welding and clamping fixture for a circulating fan frame includes a connecting component and a four-jaw fixed chuck. The two axial sides of the connecting component are coaxially fixedly connected to a positioner and the four-jaw fixed chuck, respectively. The four-jaw fixed chuck has a cross guide rail arranged vertically and vertically on the side away from the positioner. A bidirectional lead screw is rotatably installed inside the cross guide rail. Each end of the bidirectional lead screw has a slider that is embedded and slides with the cross guide rail. The side of each slider near the bidirectional lead screw is threaded with the bidirectional lead screw. A clamping assembly is fixedly connected to the side of each slider away from the bidirectional lead screw. The clamping assembly is clamped with the frame mounting panel.

[0008] By adopting the above technical solution, the connecting component enables the four-jaw fixed chuck to be coaxially connected with the positioner, ensuring that the two are concentric. The cross guide rail and the double-acting screw of the four-jaw fixed chuck cooperate, allowing the sliders at both ends of the double-acting screw to slide along the cross guide rail. The sliders drive the clamping assembly to move, and the clamping assembly forms a clamping engagement with the frame, which can clamp and fix frame mounting panels of different sizes without modifying the tooling. The threaded engagement between the slider and the double-acting screw enables the slider to move synchronously relative to the other side, so that the frame is automatically centered, ensuring that the frame and the positioner are concentric. At the same time, it can fix frame mounting panels of different regular shapes such as square, rectangular, and circular.

[0009] Preferably, the connecting assembly includes a connecting cylinder and a first flange and a second flange coaxially fixedly connected to both ends of the connecting cylinder, and the first flange and the second flange are coaxially fixedly connected to the positioner and the four-jaw chuck, respectively.

[0010] By adopting the above technical solution, the connecting cylinder and the first and second flanges coaxially fixed at its two ends can be coaxially fixedly connected to the positioner and the four-jaw fixed chuck respectively, ensuring that the four-jaw fixed chuck and the positioner are concentric, thereby making the frame and the positioner concentric. The connection between the entire clamping fixture and the positioner is more stable, ensuring that the connection state between the fixture and the positioner is stable in subsequent operations, which is beneficial for the robot to perform welding operations on the frame.

[0011] Preferably, the clamping assembly includes a fixed plate and a quick clamping clamp. The fixed plate is fixedly connected to the side of the slider away from the bidirectional lead screw, and the quick clamping clamp is detachably fixedly connected to the fixed plate and forms a clamping engagement with the frame mounting panel.

[0012] By adopting the above technical solution, the fixing plate in the clamping assembly is fixed on the slider, and the quick clamping clamp is fixed on the fixing plate and forms a clamping engagement with the frame mounting panel, so that the fixing plate and the quick clamping clamp move with the slider, thereby realizing the fixing of frame mounting panels of different sizes, which facilitates subsequent welding operations. At the same time, the quick clamping clamp is detachably mounted on the fixing plate, which facilitates the maintenance and replacement of the quick clamping clamp.

[0013] Preferably, the two sliders on any one of the bidirectional lead screws are provided with abutting surfaces on their sides that are close to each other, and the abutting surfaces form an abutting fit with the side wall of the frame mounting panel. An installation groove is provided on the side of any one of the sliders that is away from the abutting surfaces, and the fixing plate is fixedly connected to the installation groove on the slider and forms a sliding fit with the four-jaw fixing chuck.

[0014] By adopting the above technical solution, the abutting surface and the side wall of the frame mounting panel form an abutting fit, which initially tightens and fixes the frame. At the same time, the fixing plate is fixed in the mounting groove on the slider and forms a sliding fit with the four-jaw fixing chuck. This ensures that the quick clamp moves smoothly with the slider and forms a precise clamping fit with the frame, thereby further fixing the frame and ensuring that the product does not shift or loosen when the positioner rotates.

[0015] Preferably, a protrusion is provided on the side wall of the cross guide rail along the axial direction of any of the bidirectional lead screws, and a groove is provided on any of the sliders to form an embedded sliding fit with the protrusion.

[0016] By adopting the above technical solution, the protrusions on the side wall of the cross guide rail and the grooves on the slider form an embedded sliding fit, which can ensure that the slider moves stably along the axial direction of the bidirectional lead screw during the movement, avoid the slider from deviating or shaking during the movement, and thus ensure the stability and accuracy of the frame clamping.

[0017] Preferably, the four-jaw chuck is provided with an axial limiting member that engages with any of the bidirectional lead screws to form a locking and limiting relationship.

[0018] By adopting the above technical solution, and setting an axial limiting component to engage with the bidirectional lead screw, the axial movement of the bidirectional lead screw can be restricted, ensuring the stability of the bidirectional lead screw during operation and guaranteeing the reliable operation of the clamping fixture.

[0019] Preferably, the axial limiting member includes a fixing part and a limiting part. The fixing part is fixedly connected to the side of the four-jaw fixed chuck near the connecting assembly. An annular locking groove is formed on any of the bidirectional lead screws along its radial direction, and the limiting part and the annular locking groove on the bidirectional lead screw form a locking limiting engagement.

[0020] By adopting the above technical solution, the fixing part of the axial limiting component is fixedly connected to the side of the four-jaw fixed chuck near the connecting assembly, and the limiting part is engaged with the annular locking groove on the bidirectional lead screw to limit the axial movement of the bidirectional lead screw, ensuring the stable rotation of the bidirectional lead screw, thereby ensuring the stability and accuracy of the slider movement, which helps to improve the reliability and accuracy of the tooling clamping the frame.

[0021] Preferably, hexagonal holes are provided at both ends of any of the bidirectional lead screws along the axial direction.

[0022] By adopting the above technical solution, pneumatic or electric tools can be used to insert into the hexagonal hole to quickly rotate the bidirectional lead screw, thereby driving the slider and clamp assembly to move quickly, thus realizing the rapid loading and unloading of the circulating fan frame.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The bidirectional lead screw inside the cross guide rail rotates, driving the slider and clamp assembly to move synchronously relative to each other, which can fix rack mounting panels of different sizes without modifying the tooling, improving versatility. At the same time, it can fix rack mounting panels with regular shapes such as square and rectangular, expanding the scope of application.

[0025] 2. The axial limiting component can restrict the axial movement of the bidirectional lead screw, ensuring the stable rotation of the bidirectional lead screw, thereby ensuring the stability and accuracy of the slider movement, which helps to improve the reliability and accuracy of the tooling clamping the machine frame;

[0026] 3. The hexagonal holes at both ends of the bidirectional lead screw, when used with pneumatic or electric tools, can quickly move the slider, enabling rapid loading and unloading of products and improving production efficiency. Attached Figure Description

[0027] Figure 1 This is an isometric schematic diagram of the main overall structure in the embodiments of this application;

[0028] Figure 2 yes Figure 1 The enlarged view at point A mainly shows the structure of the slider and clamp assembly;

[0029] Figure 3 This is a partial isometric schematic diagram of the axial limiting component structure, which is the main feature of this application embodiment.

[0030] Reference numerals: 1. Connecting assembly; 11. Connecting cylinder; 12. First flange; 13. Second flange; 2. Four-jaw chuck; 21. Cross guide rail; 211. Rotating groove; 212. Protrusion; 3. Bidirectional lead screw; 31. Annular snap-fit ​​groove; 32. Hexagonal hole; 4. Slider; 41. Arc-shaped threaded groove; 42. Groove; 43. Abutment surface; 44. Mounting groove; 5. Clamping assembly; 51. Fixing plate; 52. Quick clamp; 6. Axial limiting component; 61. Fixing part; 62. Limiting part. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail.

[0032] This application discloses an automatic welding and clamping fixture for a circulating fan frame.

[0033] Reference Figure 1 and Figure 2 An automatic welding and clamping fixture for a circulating fan frame includes a connecting component 1 and a four-jaw chuck 2. In this embodiment, the connecting component 1 includes a connecting cylinder 11 and a first flange 12 and a second flange 13, which are coaxially fixedly connected to both ends of the connecting cylinder 11 by welding. The first flange 12 and the second flange 13 are coaxially fixedly connected to the positioner and the four-jaw chuck 2 by bolts. The four-jaw chuck 2 has a cross guide rail 21 staggered vertically on the side away from the positioner. A rotating groove 211 is opened in the cross guide rail 21 along its axial direction. A bidirectional lead screw 3 is rotatably arranged in the rotating groove 211. Each of the two bidirectional lead screws 3 has a slider 4 at both ends of its axial direction that forms an embedded sliding fit with the cross guide rail 21. Each slider 4 has an arc-shaped threaded groove 41 that forms a threaded fit with the bidirectional lead screw 3 on the side close to the bidirectional lead screw 3. A clamping assembly 5 is fixedly connected to the side of each slider 4 away from the bidirectional lead screw 3. Each clamping assembly 5 forms a clamping fit with the frame mounting panel.

[0034] In practical use, the first flange 12, the second flange 13, and the connecting cylinder 11 in the connecting assembly 1 are all coaxially fixedly connected, so that the positioner and the four-jaw fixed chuck 2, which are fixedly connected on both sides of the axial direction of the connecting assembly 1, remain coaxially fixed, thereby making the frame and the positioner concentric. Rotating any one of the bidirectional lead screws 3 in the rotating groove 211 will cause the two sliders 4 on the bidirectional lead screw 3 to slide synchronously relative to each other in the cross guide rail 21, and drive the clamping clamp assembly 5 on any slider 4 to move synchronously with the frame mounting panel, so that the frame is automatically centered, ensuring that the frame and the positioner are concentric, thereby realizing the clamping and fixing of frame mounting panels of different sizes without changing the tooling, and realizing the fixing of frame mounting panels of different regular shapes such as square, rectangular, and circular.

[0035] Reference Figure 1 and Figure 2 The cross guide rail 21 has a protrusion 212 on its side wall along the axial direction of any of the bidirectional lead screws 3, and each slider 4 has a groove 42 that forms an embedded sliding fit with the protrusion 212. In this embodiment, two protrusions 212 are symmetrically arranged about the bidirectional lead screw 3 along the radial direction of the bidirectional lead screw 3, and each protrusion 212 is fixedly connected to the side wall of the cross guide rail 21 by welding. The groove 42 on each slider 4 also has two corresponding protrusions 212 in number and position, and the protrusions 212 and grooves 42 at corresponding positions form an embedded sliding fit. In actual use, the protrusions 212 on the side wall of the cross guide rail 21 and the grooves 42 on the slider 4 form an embedded sliding fit, ensuring that the slider 4 moves stably along the axial direction of the bidirectional lead screw 3 during movement, and avoiding the slider 4 from deviating or shaking during movement.

[0036] Reference Figure 1 and Figure 2 The clamping assembly 5 includes a fixing plate 51 and a quick clamping clamp 52. The fixing plate 51 is fixedly connected to the side of the slider 4 away from the bidirectional lead screw 3 by welding, and the quick clamping clamp 52 is detachably fixedly connected to the fixing plate 51 by bolts and forms a clamping engagement with the frame mounting panel. In this embodiment, two quick clamping clamps 52 are detachably connected to any fixing plate 51. The two sliders 4 on any bidirectional lead screw 3 are provided with abutting surfaces 43 on the side close to each other, and the abutting surfaces 43 form an abutting engagement with the side wall of the frame mounting panel. A mounting groove 44 is provided on the side of any slider 4 away from the abutting surface 43, and the fixing plate 51 is fixedly connected to the mounting groove 44 on the slider 4 by welding and forms a sliding engagement with the four-jaw chuck 2.

[0037] In practical use, the contact surface 43 forms a contact fit with the side wall of the frame mounting panel to initially tighten and fix the frame. At the same time, the fixing plate 51 in the clamp assembly 5 is fixed in the mounting groove 44 on the slider 4 and forms a sliding fit with the four-jaw fixing chuck 2, which can ensure that the quick clamp 52 moves smoothly with the slider 4 and forms a precise clamping fit with the frame, further fixing the frame and realizing the fixing of frame mounting panels of different sizes, which is convenient for subsequent welding operations. The quick clamp 52 is detachably mounted on the fixing plate 51, which is convenient for maintenance and replacement of the quick clamp 52.

[0038] Reference Figure 1 and Figure 3 The four-jaw chuck 2 is provided with an axial limiting member 6 that forms a locking and limiting engagement with any of the bidirectional lead screws 3. The axial limiting member 6 includes a fixing part 61 and a limiting part 62. The fixing part 61 is fixedly connected to the side of the four-jaw chuck 2 near the connecting assembly 1 by bolts. An annular locking groove 31 is provided on any of the bidirectional lead screws 3 along its radial direction, and the limiting part 62 forms a locking and limiting engagement with the annular locking groove 31 on the bidirectional lead screw 3. In this embodiment, two axial limiting members 6 are provided along the axial direction of any of the bidirectional lead screws 3. The number and position of the annular locking groove 31 on any of the bidirectional lead screws 3 are also provided in two. The limiting part 62 of any axial limiting member 6 passes through a rotating groove 211 and forms a locking and limiting engagement with the corresponding annular locking groove 31.

[0039] In practical use, the fixing part 61 of the axial limiting part 6 is fixedly connected to the side of the four-jaw fixed chuck 2 near the connecting component 1, and the limiting part 62 is engaged with the annular locking groove 31 on the bidirectional lead screw 3 to limit the axial movement of the bidirectional lead screw 3, ensuring the stable rotation of the bidirectional lead screw 3, thereby ensuring the stability and accuracy of the movement of the slider 4.

[0040] Reference Figure 2 and Figure 3Each of the two-way lead screws 3 has hexagonal holes 32 at both ends along the axis. In actual use, pneumatic or electric tools can be inserted into the hexagonal holes 32 to quickly rotate the two-way lead screw 3, thereby driving the slider 4 and the clamp assembly 5 to move quickly, thus realizing the quick loading and unloading of the circulating fan frame.

[0041] The implementation principle of this application embodiment is as follows: the first flange 12 and the second flange 13, which are coaxially fixed at both ends of the connecting cylinder 11 in the connecting assembly 1, are coaxially fixed to the positioner and the four-jaw fixed chuck 2, respectively, to ensure the coaxiality of the entire system and keep the frame and the positioner concentric, providing a reference for subsequent welding; by rotating the bidirectional lead screw 3 to drive the slider 4 in the cross guide rail 21 to move synchronously relative to each other, the frame can be automatically centered, ensuring that the frame and the positioner are concentric, and the clamping assembly 5 can clamp and fix the frame mounting panels of different sizes without modifying the tooling, and at the same time, it can fix the frame mounting panels of different regular shapes such as square, rectangular, and circular; the protrusion 212 on the side wall of the cross guide rail 21 and the groove 42 on the slider 4 form an embedded sliding fit, which can prevent the slider 4 from shifting or shaking when it moves;

[0042] The slider 4 first abuts against the side wall of the frame mounting panel via the contact surface 43, and then is fixed a second time by the quick clamp 52 in the clamp assembly 5, which facilitates subsequent stable welding operations. The quick clamp 52 is detachably mounted on the fixing plate 51, which facilitates maintenance and replacement of the quick clamp 52. The fixing part 61 of the axial limiting part 6 is fixedly connected to the side of the four-jaw fixed chuck 2 near the connecting assembly 1, and the limiting part 62 engages with the annular locking groove 31 on the bidirectional lead screw 3 to limit the axial movement of the bidirectional lead screw 3 and ensure the stable rotation of the bidirectional lead screw 3. The hexagonal holes 32 set at both ends of the bidirectional lead screw 3 facilitate the rapid rotation of the bidirectional lead screw 3 by pneumatic or electric tools, thereby realizing the rapid loading and unloading of the circulating fan frame.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic welding and clamping fixture for a circulating fan frame, characterized in that: The assembly includes a connecting component (1) and a four-jaw fixed chuck (2). The two sides of the connecting component (1) are coaxially fixedly connected to the positioner and the four-jaw fixed chuck (2), respectively. The four-jaw fixed chuck (2) is provided with a cross guide rail (21) staggered vertically on the side away from the positioner. A bidirectional lead screw (3) is rotatably arranged inside the cross guide rail (21). Both ends of the bidirectional lead screw (3) are provided with a slider (4) that forms an embedded sliding fit with the cross guide rail (21). The side of the slider (4) close to the bidirectional lead screw (3) forms a threaded fit with the bidirectional lead screw (3). A clamping assembly (5) is fixedly connected to the side of the slider (4) away from the bidirectional lead screw (3). The clamping assembly (5) forms a clamping fit with the frame mounting panel.

2. The automatic welding and clamping fixture for a circulating fan frame according to claim 1, characterized in that: The connecting assembly (1) includes a connecting cylinder (11) and a first flange (12) and a second flange (13) that are coaxially fixedly connected to both ends of the connecting cylinder (11), and the first flange (12) and the second flange (13) are coaxially fixedly connected to the positioner and the four-jaw fixed chuck (2), respectively.

3. The automatic welding and clamping fixture for a circulating fan frame according to claim 1, characterized in that: The clamping assembly (5) includes a fixed plate (51) and a quick clamp (52). The fixed plate (51) is fixedly connected to the side of the slider (4) away from the bidirectional lead screw (3), and the quick clamp (52) is detachably fixedly connected to the fixed plate (51) and forms a clamping engagement with the frame mounting panel.

4. The automatic welding and clamping fixture for a circulating fan frame according to claim 3, characterized in that: The two sliders (4) on any one of the bidirectional lead screws (3) are provided with abutting surfaces (43) on the side that are close to each other, and the abutting surfaces (43) form an abutting fit with the side wall of the frame mounting panel. The slider (4) is provided with a mounting groove (44) on the side away from the abutting surface (43), and the fixing plate (51) is fixedly connected in the mounting groove (44) on the slider (4) and forms a sliding fit with the four-jaw fixing chuck (2).

5. The automatic welding and clamping fixture for a circulating fan frame according to claim 1, characterized in that: The side wall of the cross guide rail (21) is provided with a protrusion (212) along the axial direction of any of the two-way lead screws (3), and any of the sliders (4) is provided with a groove (42) that forms an embedded sliding fit with the protrusion (212).

6. The automatic welding and clamping fixture for a circulating fan frame according to claim 1, characterized in that: The four-jaw fixed chuck (2) is provided with an axial limiting member (6) that forms a locking and limiting engagement with any of the bidirectional lead screws (3).

7. The automatic welding and clamping fixture for a circulating fan frame according to claim 6, characterized in that: The axial limiting member (6) includes a fixing part (61) and a limiting part (62). The fixing part (61) is fixedly connected to the side of the four-jaw fixed chuck (2) near the connecting assembly (1). An annular snap-fit ​​groove (31) is provided on any of the bidirectional lead screws (3) along its radial direction, and the limiting part (62) and the annular snap-fit ​​groove (31) on the bidirectional lead screw (3) form a snap-fit ​​limiting cooperation.

8. The automatic welding and clamping fixture for a circulating fan frame according to claim 1, characterized in that: Hexagonal holes (32) are provided at both ends of any of the bidirectional lead screws (3) in the axial direction.

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