Variable-angle special-shaped pipe workpiece clamping fixture
By designing a multi-angle adjustable clamping mechanism, the material waste and process problems of clamping irregularly shaped tubular workpieces in CNC machining are solved, and efficient workpiece adaptive clamping and rapid flipping are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHAANXI AIRCRAFT CORPORATION
- Filing Date
- 2025-11-24
- Publication Date
- 2026-04-17
AI Technical Summary
In existing CNC machining, complex-shaped workpieces present problems of material waste and redundant processes during clamping, and traditional clamping methods are difficult to adapt to a variety of workpieces.
A variable-angle clamping fixture for irregularly shaped tubular workpieces was designed. It employs multiple detachable clamping mechanisms, including a mounting frame, a lifting assembly, a pitch adjustment assembly, and a clamping assembly. Multi-angle clamping is achieved through lifting and pitch adjustment, adapting to tubular workpieces with different end extension directions.
It improves the versatility of the fixture, reduces workpiece material waste and unnecessary auxiliary processes, and enables the workpiece to be quickly flipped to complete the machining.
Smart Images
Figure CN121870650A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of CNC machining, and in particular to a clamping fixture for variable-angle irregular-shaped tubular workpieces. Background Technology
[0002] The most basic and traditional clamping methods in CNC machining are direct clamping with a clamping plate and clamping with a vise and special fixtures. The purpose is to clamp the workpiece on the worktable of the CNC machining equipment and prevent workpiece movement and coordinate reference selection during machining. For workpieces with complex shapes, one common method is to leave clamping allowance during the blanking stage. This method results in material waste and subsequent clamping allowance removal processes, leading to wasted time. Another method is to weld clamping plates, which wastes less material than the first method, but still involves additional processes. Finally, there are special clamping fixtures, which can only clamp one type of workpiece. Summary of the Invention
[0003] In view of this, this application provides a clamping fixture for irregularly shaped tubular workpieces with variable angles, which solves the problems in the prior art and improves the versatility of the fixture.
[0004] The technical solution for a clamping fixture for variable-angle irregular-shaped tubular workpieces provided in this application is as follows: A variable-angle irregular-shaped tube workpiece clamping fixture includes multiple clamping mechanisms that are detachably fixed to a processing platform at different angles. Each clamping assembly includes a mounting frame, a lifting assembly, a pitch adjustment assembly, and a clamping assembly. The lifting assembly is mounted on the mounting frame, the pitch adjustment assembly is mounted on the output end of the lifting assembly, and the clamping assembly is mounted on the output end of the pitch adjustment assembly. The clamping assemblies on different clamping mechanisms face the end of the workpiece, and the clamping assemblies are used to clamp the end of the workpiece.
[0005] Optionally, the clamping assembly includes a clamping base, two opposing first clamping blocks and two opposing second clamping blocks, the two first clamping blocks being spaced apart along a first direction and the two second clamping blocks being spaced apart along a second direction, the first direction being perpendicular to the second direction; The first and second clamping blocks are slidably mounted on the clamping seat via T-shaped sliders. The first and second clamping blocks are distributed sequentially at intervals along a third direction, which is perpendicular to both the first and second directions. A first double-ended screw extending along the first direction is rotatably provided inside the clamping seat. The threads at both ends of the first double-ended screw are in opposite directions, and the two threads of the first double-ended screw respectively engage with the T-shaped sliders of the two first clamping blocks. A second double-ended screw extending along the second direction is rotatably provided inside the clamping seat. The threads at both ends of the second double-ended screw are in opposite directions, and the two threads of the second double-ended screw respectively engage with the T-shaped sliders of the two second clamping blocks.
[0006] Optionally, the ends of the first and second double-ended screws extend out of the clamping seat, and the end faces of the first and second double-ended screws extending out of the clamping seat are provided with regular hexagonal grooves.
[0007] Optionally, the mounting bracket includes an upper mounting plate and a lower mounting plate, and two parallel and spaced guide rods are provided between the upper mounting plate and the lower mounting plate; The lifting assembly includes a lifting screw parallel to the guide rod and a housing. The lifting screw is rotatably connected to the upper mounting plate and the lower mounting plate. The housing is threadedly connected to the lifting screw. The pitch adjustment assembly is mounted on the housing.
[0008] Optionally, the pitch adjustment assembly includes a rotating rod and a worm gear assembly installed inside the housing. The rotating rod is rotatably connected to the housing. The axis of rotation of the rotating rod is perpendicular to the length direction of the lifting screw and is arranged in a horizontal direction. Both ends of the rotating rod extend out of the housing. The clamping assembly is fixedly connected to the ends of the rotating rod via a connecting rod. The worm gear and the rotating rod of the worm gear assembly are coaxial and fixedly arranged. The worm of the worm gear assembly is provided with an extension rod. One end of the extension rod extends out of the housing. The housing is provided with a through hole for the extension rod to extend out, and the extension rod is rotatably arranged relative to the through hole.
[0009] Optionally, the outer casing is rectangular or cubic, the end face of the extension rod extending out of the outer casing is flush with the side face of the outer casing, and a regular hexagonal groove is provided on the end face of the extension rod extending out of the outer casing.
[0010] In summary, this application includes the following beneficial technical effects: The tooling fixture of this application can adapt to multiple tube workpieces with different end extension directions, and has a wide range of applications; it reduces workpiece material waste and unnecessary auxiliary processes.
[0011] The mounting bracket of this application allows for quick workpiece flipping after one side of the workpiece has been machined, by directly flipping the mounting bracket and changing the upper and lower positions of the mounting plates. Attached Figure Description
[0012] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the structure of multiple clamping mechanisms clamping a workpiece in this application; Figure 2 This is a structural diagram of a single blessing institution in this application; Figure 3 This is a schematic diagram of the clamping assembly and pitch adjustment assembly of this application.
[0014] Explanation of reference numerals in the attached drawings: 1. Mounting bracket; 11. Upper mounting plate; 12. Lower mounting plate; 13. Guide rod; 2. Lifting assembly; 21. Lifting screw; 22. Housing; 3. Pitch adjustment assembly; 31. Rotating rod; 32. Worm gear; 33. Worm; 34. Extension rod; 4. Clamping assembly; 41. First clamping block; 42. Second clamping block; 43. T-shaped slider; 44. First double-ended screw; 45. Second double-ended screw; 46. Clamping seat. Detailed Implementation
[0015] The embodiments of this application will now be described in detail with reference to the accompanying drawings.
[0016] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0017] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.
[0018] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0019] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.
[0020] This application provides a clamping fixture for variable-angle irregular-shaped tubular workpieces.
[0021] like Figures 1 to 3 As shown, a variable-angle irregular-shaped tube workpiece clamping fixture includes multiple clamping mechanisms that are detachably fixed to the processing platform at different angles. Each clamping component 4 includes a mounting frame 1, a lifting component 2, a pitch adjustment component 3, and a clamping component 4.
[0022] The lifting assembly 2 is mounted on the mounting frame 1, the pitch adjustment assembly 3 is mounted on the output end of the lifting assembly 2, and the clamping assembly 4 is mounted on the output end of the pitch adjustment assembly 3. The clamping assemblies 4 on different clamping mechanisms face the end of the workpiece, and the clamping assembly 4 is used to clamp the end of the workpiece.
[0023] The number of clamping mechanisms is selected based on the number of ends of the tubular workpiece. The mounting bracket 1 of the clamping structure is fixed to the position of the workpiece end on the machining platform, such as a hydraulic press or CNC milling machine. Then, the position of the clamping end of the clamping assembly 4 is adjusted by the lifting assembly 2 and the pitch adjustment assembly 3 so that the clamping end can stably clamp the end of the workpiece.
[0024] The tooling fixture of this application can adapt to multiple tube workpieces with different end extension directions, and has a wide range of applications; it reduces the waste of workpiece materials and the problem of unnecessary auxiliary processes.
[0025] The mounting frame 1 includes an upper mounting plate 11 and a lower mounting plate 12, with two parallel and spaced guide rods 13 between the upper mounting plate 11 and the lower mounting plate 12. The lifting assembly 2 includes a lifting screw 21 parallel to the guide rods 13 and a housing 22. The lifting screw 21 is rotatably connected to the upper mounting plate 11 and the lower mounting plate 12, and the housing 22 is threadedly connected to the lifting screw 21. The pitch adjustment assembly 3 is mounted on the housing 22. A hexagonal convex ring can be provided on the lifting screw 21 near the outer periphery of the upper mounting plate 11 or the lower mounting plate 12 to facilitate the rotation of the lifting screw 21 with a wrench. The mounting frame 1 of this application allows for quick workpiece flipping after one side of the workpiece has been machined, by directly flipping the mounting frame 1 and changing the vertical positions of the upper mounting plate 11 and the lower mounting plate 12.
[0026] The clamping assembly 4 includes a clamping base 46, two opposing first clamping blocks 41, and two opposing second clamping blocks 42. The two first clamping blocks 41 are spaced apart along a first direction, and the two second clamping blocks 42 are spaced apart along a second direction, the first direction being perpendicular to the second direction. The first clamping blocks 41 and the second clamping blocks 42 are slidably mounted on the clamping base 46 via T-shaped sliders 43. The first clamping blocks 41 and the second clamping blocks 42 are sequentially spaced apart along a third direction, the third direction being perpendicular to both the first and second directions. A first double-ended screw 44 extending along the first direction is rotatably provided inside the clamping base 46. The threads at both ends of the first double-ended screw 44 are in opposite directions, and the two threads of the first double-ended screw 44 are respectively threaded into the T-shaped sliders 43 of the two first clamping blocks 41. A second double-ended screw 45 extending along the second direction is rotatably provided inside the clamping base 46. The threads at both ends of the second double-ended screw 45 are in opposite directions, and the two threads of the second double-ended screw 45 are respectively threaded into the T-shaped sliders 43 of the two second clamping blocks 42. By rotating the first double-ended screw 44, the two first clamping blocks 41 move closer or further apart. By rotating the second double-ended screw 45, the two second clamping blocks 42 move closer or further apart. The first clamping blocks 41 and the second clamping blocks 42 are independently controlled, which can adapt to tubular workpieces with irregular cross-sections and ensure the stability of clamping.
[0027] The ends of the first double-ended screw 44 and the second double-ended screw 45 extend out of the clamping seat 46, and the end faces of the first double-ended screw 44 and the second double-ended screw 45 extending out of the clamping seat 46 are provided with regular hexagonal grooves. A hexagonal wrench can be used to easily rotate the first double-ended screw 44 and the second double-ended screw 45 by engaging the regular hexagonal grooves. In another embodiment, regular square grooves can also be provided on the end faces of the first double-ended screw 44 and the second double-ended screw 45, allowing a square tool to be used to rotate the first double-ended screw 44 and the second double-ended screw 45.
[0028] The pitch adjustment assembly 3 includes a rotating rod 31 and a worm gear assembly installed inside the housing 22. The rotating rod 31 is rotatably connected to the housing 22. The axis of rotation of the rotating rod 31 is perpendicular to the length direction of the lifting screw 21 and is arranged in a horizontal direction. Both ends of the rotating rod 31 extend out of the housing 22. The clamping assembly 4 is fixedly connected to the ends of the rotating rod 31 via a connecting rod. The worm gear 32 of the worm gear assembly is coaxial with and fixedly arranged with the rotating rod 31. An extension rod 34 is provided on the worm 33 of the worm gear assembly. One end of the extension rod 34 extends out of the housing 22. The housing 22 is provided with a through hole for the extension rod 34 to extend out, and the extension rod 34 is rotatably arranged relative to the through hole.
[0029] The extension rod 34 drives the worm gear 33 to rotate, which in turn drives the worm wheel 32 to rotate, thereby rotating the rotating rod 31 and driving the pitch adjustment of the clamping assembly 4. Utilizing the self-locking principle of the worm gear assembly—that is, when the worm gear 33 stops rotating, the force exerted by the worm wheel 32 on the worm gear 33 cannot cause it to rotate—the pitch angle of the clamping assembly 4 is locked.
[0030] The outer casing 22 is rectangular or cubic. The end face of the extension rod 34 extending out of the outer casing 22 is flush with the side face of the outer casing 22, and a regular hexagonal groove is provided on the end face of the extension rod 34 extending out of the outer casing 22. A hexagonal wrench is used to easily rotate the extension rod 34 and the worm gear 33 by engaging the regular hexagonal groove. In another embodiment, a regular square groove is also provided on the end face of the extension rod 34 extending out of the outer casing 22, allowing a square tool to be used to rotate the extension rod 34.
[0031] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A clamping fixture for irregularly shaped tubular workpieces with variable angles, characterized in that, It includes multiple clamping mechanisms that are detachably fixed to the processing platform at different angles. Each clamping assembly (4) includes a mounting frame (1), a lifting assembly (2), a pitch adjustment assembly (3), and a clamping assembly (4). The lifting assembly (2) is mounted on the mounting frame (1), the pitch adjustment assembly (3) is mounted on the output end of the lifting assembly (2), and the clamping assembly (4) is mounted on the output end of the pitch adjustment assembly (3). The clamping assemblies (4) on different clamping mechanisms face the end of the workpiece, and the clamping assemblies (4) are used to clamp the end of the workpiece.
2. The variable-angle irregular-shaped tube workpiece clamping fixture according to claim 1, characterized in that, The clamping assembly (4) includes a clamping seat (46), two opposing first clamping blocks (41) and two opposing second clamping blocks (42), the two first clamping blocks (41) are spaced apart along a first direction, and the two second clamping blocks (42) are spaced apart along a second direction, the first direction being perpendicular to the second direction; The first clamping block (41) and the second clamping block (42) are slidably mounted on the clamping seat (46) via T-shaped sliders (43). The first clamping block (41) and the second clamping block (42) are distributed sequentially at intervals along a third direction, which is perpendicular to the first direction and perpendicular to the second direction. A first double-ended screw (44) extending along the first direction is rotatably provided inside the clamping seat (46). The thread directions at both ends of the first double-ended screw (44) are opposite. The two threads of the first double-ended screw (44) are respectively threaded into the T-shaped sliders (43) of the two first clamping blocks (41). A second double-ended screw (45) extending along the second direction is rotatably provided inside the clamping seat (46). The thread directions at both ends of the second double-ended screw (45) are opposite. The two threads of the second double-ended screw (45) are respectively threaded into the T-shaped sliders (43) of the two second clamping blocks (42).
3. The variable-angle irregular-shaped tube workpiece clamping fixture according to claim 2, characterized in that, The ends of the first double-ended screw (44) and the second double-ended screw (45) extend out of the clamping seat (46), and the end faces of the first double-ended screw (44) and the second double-ended screw (45) extending out of the clamping seat (46) are provided with regular hexagonal grooves.
4. The variable-angle irregular-shaped tube workpiece clamping fixture according to claim 1, characterized in that, The mounting bracket (1) includes an upper mounting plate (11) and a lower mounting plate (12), and two parallel and spaced guide rods (13) are provided between the upper mounting plate (11) and the lower mounting plate (12); The lifting assembly (2) includes a lifting screw (21) parallel to the guide rod (13) and a housing (22). The lifting screw (21) is rotatably connected to the upper mounting plate (11) and the lower mounting plate (12). The housing (22) is threadedly connected to the lifting screw (21). The pitch adjustment assembly (3) is mounted on the housing (22).
5. The variable-angle irregular-shaped tube workpiece clamping fixture according to claim 4, characterized in that, The pitch adjustment assembly (3) includes a rotating rod (31) and a worm gear (32) and worm (33) assembly installed in the housing (22). The rotating rod (31) and the housing (22) are rotatably connected. The axis of rotation of the rotating rod (31) is perpendicular to the length direction of the lifting screw (21) and is set in the horizontal direction. Both ends of the rotating rod (31) extend out of the housing (22). The clamping assembly (4) is fixedly connected to the end of the rotating rod (31) through a connecting rod. The worm wheel (32) and the rotating rod (31) of the worm wheel (32) and worm (33) assembly are coaxial and fixedly arranged. The worm (33) of the worm wheel (32) and worm (33) assembly is provided with an extension rod (34). One end of the extension rod (34) extends out of the housing (22). The housing (22) is provided with a through hole for the extension rod (34) to extend out, and the extension rod (34) is rotatably arranged relative to the through hole.
6. The variable-angle irregular-shaped tube workpiece clamping fixture according to claim 5, characterized in that, The outer shell (22) is cuboid or cube-shaped. The extension rod (34) extends out of the end face of the outer shell (22) and is flush with the side face of the outer shell (22). The extension rod (34) has a regular hexagonal groove on the end face of the outer shell (22).