A tooling for machining thin-walled parts

Abstract

This utility model provides a machining fixture for thin-walled parts, comprising: a machining table with a control cavity inside, and an inner support fixedly connected to the upper surface of the machining table; an inner support portion disposed in the inner support base and the control cavity; an outer abutment portion, wherein a plurality of outer abutments are arranged in a circular array outside the inner support base and corresponding to the inner support portion; a translation portion disposed on the machining table and fixed to the plurality of outer abutments; and a drive portion installed in the control cavity. This machining fixture controls the inner support portion and the translation portion to work synchronously via the drive portion. The top support frustum and the inclined groove of the inner support block cooperate to achieve synchronous radial expansion of the plurality of inner support blocks. The drive disc of the translation portion drives the slider to move horizontally, achieving synchronous clamping or loosening of the plurality of outer abutments, ensuring that the thin-walled part is subjected to uniform internal and external bidirectional clamping force during machining, effectively preventing deformation.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and more specifically, to a tooling for machining thin-walled parts. Background Technology

[0002] Thin-walled parts typically refer to parts with a wall thickness of less than 3mm. Thin-walled parts are widely used due to their light weight, material saving, and compact structure. However, because the wall thickness of these parts is too thin, they are prone to deformation during machining due to uneven clamping force or cutting vibration, which affects dimensional accuracy and surface quality.

[0003] However, existing tooling for machining thin-walled parts has some defects or shortcomings:

[0004] Existing machining fixtures generally only use external clamps or internal supports to hold workpieces. The clamping force is concentrated, and thin-walled parts are prone to elastic deformation. Springback after machining leads to poor dimensions and affects the quality of thin-walled workpieces. Furthermore, when clamping, multi-point clamping mechanisms rely on independent drives and often adopt step-by-step operations. Asynchronous actions can introduce additional stress, making it difficult to ensure the synchronous balance of internal and external clamping forces, increasing clamping time, affecting the machining efficiency of thin-walled parts, and making it difficult to quickly adapt to clamping thin-walled parts of different diameters, resulting in poor adaptability. Utility Model Content

[0005] The purpose of this invention is to provide a tooling for machining thin-walled parts to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides a tooling for machining thin-walled parts, including: a machining table, the machining table having a control cavity inside, and an inner support fixedly connected to the upper surface of the machining table;

[0007] An inner support portion; the inner support portion is disposed within the inner support seat and the control cavity;

[0008] The outer abutment portion, a plurality of the outer abutment portions are arranged in a ring array outside the inner support base and correspond to the inner support portion;

[0009] A translation part is disposed on the processing table and fixed to several of the outer abutment parts;

[0010] The drive unit is installed in the control cavity and connected to the inner support and the translation unit, wherein...

[0011] The driving part is driven, and the translation part can drive several translation parts to move horizontally synchronously, moving closer to or away from the inner support part. The inner support part can move in the inner support seat, moving closer to or away from several outer abutments.

[0012] Furthermore, the inner support portion includes a top support frustum disposed within the control cavity, a control groove formed within the inner support seat and adapted to the top support frustum, several sliding grooves arranged in a circular array within the inner support seat and all communicating with the control grooves, several inner support blocks respectively fitted and slidably inserted into the several sliding grooves, several control inclined grooves respectively formed on the several inner support blocks and adapted to the outer wall of the top support frustum, a guide rod fixed within the control groove, and a guide groove formed on the top support frustum and adapted to the guide rod.

[0013] Furthermore, the inner support also includes a plurality of return springs respectively disposed in a plurality of the plurality of the sliding grooves;

[0014] One end of the return spring is fixed to the inner wall of the slide groove, and the other end is fixed to the inner support block;

[0015] When the top support platform moves upward and pushes the inner support block to move in the slide groove under the guidance of the control groove, the return spring is compressed.

[0016] Furthermore, the translation unit includes a drive disk rotatably mounted in the control cavity, a plurality of translation slots arranged in a ring array on the upper surface of the processing table, a plurality of sliders slidably mounted in the plurality of translation slots, a plurality of push blocks fixed to the bottom of the plurality of sliders, a plurality of drive slots arranged in a ring array on the drive disk and providing movement for the plurality of push blocks; and a plurality of support wheels rotatably connected to the outside of the plurality of push blocks and adapted to the plurality of drive slots.

[0017] The driving slots are respectively inclined relative to the translation slots.

[0018] Furthermore, the outer abutment includes a support frame fixed to the upper end of one of the sliders and abutting against the upper surface of the processing table, an adjusting bolt threaded to the support frame, an outer abutment rod rotatably connected to the adjusting bolt, and two limiting rods symmetrically fixed to the outer abutment rod and slidably connected to the support frame.

[0019] Furthermore, the drive unit includes a drive motor fixed in the control cavity, a control gear ring fixed on the lower surface of the drive disk, a drive rod fixed at the output end of the drive motor, a control gear fixed at the other end of the drive rod and meshing with the control gear ring, a drive gear fixedly sleeved on the outside of the drive rod, two control screws symmetrically rotatably mounted in the control cavity and threadedly connected to the top support frustum, transmission gears fixedly sleeved on the outside of the two control screws respectively, and a transmission belt meshing on the drive gear and the outside of the two transmission gears.

[0020] Furthermore, the outer wall of the top support truncated cone is provided with several sets of abutting balls arranged in a ring to abut against several of the inner support blocks.

[0021] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0022] This thin-walled part machining fixture, through its internal support section, utilizes the cooperation between the conical surface of the top support truncated cone and the upper control grooves of several internal support blocks. As the top support truncated cone moves upward, the internal support blocks are pushed and move synchronously in several sliding grooves, expanding radially to support the thin-walled part from the inside and counteract external cutting forces. Simultaneously, under the control of the translation section, several external abutments move synchronously towards the part to be machined, constraining the movement of the part from the outside. The clamping of the part is completed synchronously from the inside and outside, with the clamping forces balancing each other to ensure the stability of the part during machining, preventing deformation and ensuring the quality of the part machining. The position of the external abutment rod can be controlled by rotating the adjustment bolt in the external abutment section to quickly adapt to parts of different sizes, facilitating the clamping of parts of different diameters and ensuring the adaptability of the fixture.

[0023] This thin-walled part machining fixture, through its drive unit, operates under the control of a drive motor. The drive rod drives the control gear and the drive gear to rotate synchronously, thereby engaging the transmission control gear ring with two transmission gears. This enables the translation unit to operate, driving several outer abutments to move horizontally synchronously. The rotation of two control screws drives the top support frustum in the inner support unit to move vertically, causing the inner support unit to expand radially. This allows the fixture to simultaneously clamp the part at multiple points inside and outside, effectively reducing the clamping time and ensuring the machining efficiency of thin-walled parts. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 A perspective view of the present invention is shown;

[0026] Figure 2 A partial bottom-view perspective view of this utility model is shown;

[0027] Figure 3 A cross-sectional view of the present invention is shown;

[0028] Figure 4 This invention demonstrates a partially disassembled three-dimensional representation. Figure 1 ;

[0029] Figure 5 This invention provides a partially cross-sectional perspective view. Figure 1 ;

[0030] Figure 6 This invention provides a partially cross-sectional perspective view. Figure 2 ;

[0031] Figure 7 This invention demonstrates a partially disassembled three-dimensional representation. Figure 2 .

[0032] In the picture

[0033] 1. Machining table; 2. Control cavity; 3. Inner support seat; 4. Inner support part; 5. Outer abutment part; 6. Translation part; 7. Drive part; 8. Top support truncated cone; 9. Control groove; 10. Slide groove; 11. Inner support block; 12. Control inclined groove; 13. Guide rod; 14. Guide groove; 15. Return spring; 16. Drive disc; 17. Translation groove; 18. Slider; 19. Push block; 20. Drive groove; 21. Support frame; 22. Adjustment bolt; 23. Outer abutment rod; 24. Limiting rod; 25. Drive motor; 26. Control gear ring; 27. Drive rod; 28. Control gear; 29. ​​Control screw; 30. Transmission gear; 31. Transmission belt; 32. Abutment ball; 33. Support wheel; 34. Drive gear. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0035] like Figure 1-7 As shown, a tooling for machining thin-walled parts includes: a machining table 1, a control cavity 2 is provided inside the machining table 1, and an inner support 3 is fixedly connected to the upper surface of the machining table 1;

[0036] Inner support part 4; the inner support part 4 is disposed in the inner support seat 3 and the control cavity 2;

[0037] The outer abutment 5, a plurality of the outer abutment 5 are arranged in a ring array outside the inner support 3 and correspond to the inner support 4;

[0038] Translation part 6 is disposed on the processing table 1 and fixed to a plurality of the outer abutment parts 5;

[0039] Drive unit 7, which is installed in the control cavity 2 and connected to the inner support 4 and the translation part 6, wherein

[0040] The driving part 7 is driven, and the translation part 6 can drive several translation parts 6 to move horizontally synchronously, moving closer to or away from the inner support part 4. The inner support part 4 can move in the inner support seat 3, moving closer to or away from several outer abutment parts 5.

[0041] In the initial state, the inner support blocks 11 in the inner support part 4 are respectively housed in the sliding grooves 10, and the outer abutments 5 are all located away from the inner support seat 3. At this time, the part can be easily placed between the inner support seat 3 and the outer abutments 5. When in use, the drive part 7 works, controlling the drive rod 27 to rotate, controlling the translation part 6 to work synchronously with the inner support part 4. The drive rod 27 drives the control gear 28 to rotate, which in turn meshes with the transmission control gear ring 26 to drive the drive disk 16 in the translation part 6 to rotate. The inclined drive grooves 20 on the drive disk 16 push the push blocks 19 through the abutment wheels 33, respectively driving the sliders 18 to move horizontally towards the center of the workpiece along the translation grooves 17. The outer abutment rods 23 in the outer abutment part 5 move towards the outer wall of the workpiece synchronously with the support frame 21, completing the multi-point clamping of the thin-walled part. At the same time, the drive rod 27 controls the drive gear 34 to rotate, and under the meshing transmission of the transmission belt 31, it drives the two transmission gears 30 to drive the two control gears 28. The lead screw 29 rotates synchronously, thereby controlling the vertical movement of the top support frustum 8 in the inner support part 4. The conical surface of the top support frustum 8 pushes several inner support blocks 11 to expand radially synchronously along several sliding grooves 10 through several control inclined grooves 12, thereby synchronously clamping the workpiece from multiple points inside. Under the control of the drive part 7, the inner support part 4 and several outer abutments 5 work and operate simultaneously, realizing synchronous clamping of the part from multiple points inside and outside, effectively reducing the clamping time of the part, ensuring the processing efficiency of thin-walled parts, and ensuring the dynamic balance of the clamping forces inside and outside the part. The inner support force and the outer clamping force cancel each other out, the workpiece is subjected to uniform force, and external interference such as cutting force and vibration is offset, avoiding deformation of the part during clamping and affecting the processing quality. After the part is processed, the drive motor 25 reverses, the top support frustum 8 moves down, and several return springs 15 synchronously pull several inner support blocks 11 to retract; at the same time, the drive disk 16 rotates in the opposite direction, and several outer abutments 5 synchronously return to their original positions for quick part replacement.

[0042] Optionally, the inner support portion 4 includes a top support frustum 8 disposed in the control cavity 2, a control groove 9 formed in the inner support seat 3 and adapted to the top support frustum 8, a plurality of sliding grooves 10 arranged in a ring array in the inner support seat 3 and all communicating with the control grooves 9, a plurality of inner support blocks 11 respectively fitted and slidably inserted in the plurality of sliding grooves 10, a plurality of control inclined grooves 12 respectively formed on the plurality of inner support blocks 11 and adapted to the outer wall of the top support frustum 8, and a guide rod 13 fixed in the control groove 9, formed on the top support frustum 8 and connected to the guide rod. The guide groove 14, which is adapted to the 13 phases, cooperates with the guide rod 13 when the drive unit 7 controls the movement of the top support truncated cone 8 to ensure that the top support truncated cone 8 moves stably and vertically. Since the outer wall of the top support truncated cone 8 is a conical structure, it contacts the control inclined groove 12 on several inner support blocks 11. As the top support truncated cone 8 moves upward, its conical surface pushes the inner support blocks 11 to slide outward along the sliding groove 10 to achieve radial expansion. Several inner support blocks 11 simultaneously contact the inner wall of the workpiece to avoid workpiece deformation caused by eccentric load. In addition, a displacement sensor can be added to monitor the radial displacement of several inner support blocks 11 in real time to ensure control accuracy.

[0043] Optionally, the inner support 4 may further include a plurality of return springs 15 respectively disposed in a plurality of the plurality of the sliding grooves 10;

[0044] One end of the return spring 15 is fixed to the inner wall of the slide groove 10, and the other end is fixed to the inner support block 11;

[0045] When the top support truncated cone 8 moves upward and pushes the inner support block 11 to move in the slide groove 10 under the guidance of the control inclined groove 12, the return spring 15 is compressed.

[0046] As the inner support blocks 11 expand outward along the slide groove 10, the return springs 15 are compressed, storing elastic potential energy. Then, when the top support truncated cone 8 releases its contact with the inner support blocks 11, the inner support blocks 11 retract inward along the slide groove 10 under the elastic force of the return springs 15, restoring the inner support part 4 to its initial state and completing the workpiece release without the need for reverse drive or manual reset. Furthermore, under the spring preload of the return springs 15, the inner support blocks 11 always maintain contact with the top support truncated cone 8, avoiding clamping loosening due to gaps and ensuring machining accuracy.

[0047] Optionally, the translation unit 6 includes a drive disk 16 rotatably mounted in the control cavity 2, a plurality of translation grooves 17 arranged in a ring array on the upper surface of the processing table 1, a plurality of sliders 18 slidably mounted in the plurality of translation grooves 17, a plurality of push blocks 19 fixed to the bottom of the plurality of sliders 18, a plurality of drive grooves 20 arranged in a ring array on the drive disk 16 and providing movement for the plurality of push blocks 19; and a plurality of support wheels 33 rotatably connected to the outside of the plurality of push blocks 19 and adapted to the plurality of drive grooves 20.

[0048] The drive grooves 20 are respectively inclined relative to the translation grooves 17. When the drive unit 7 controls the drive disk 16 to rotate, the inclined drive grooves 20 push the abutment wheels 33, causing the push blocks 19 to generate a horizontal component force. Since the push blocks 19 are respectively fixed on the sliders 18, the sliders 18 are forced to make radial linear movements along the translation grooves 17. All drive grooves 20 on the drive disk 16 are inclined at the same angle, ensuring that the sliders 18 in the ring array move towards or away from the center synchronously, avoiding workpiece skewing or deformation caused by asynchronous clamping. The abutment wheels 33 make the push blocks 19 and drive grooves 20 roll and rub together, effectively reducing the wear of the push blocks 19 moving in the drive grooves 20 and effectively improving the service life.

[0049] Optionally, the outer abutment 5 includes a support frame 21 fixed to the upper end of one of the sliders 18 and abutting against the upper surface of the processing table 1, an adjusting bolt 22 threadedly connected to the support frame 21, an outer abutment rod 23 rotatably connected to the adjusting bolt 22, and two limiting rods 24 symmetrically fixed to the outer abutment rods 23 and slidably connected to the support frame 21. In use, the translation part 6 drives several support frames 21 to move mechanically toward the workpiece, thereby driving several outer abutment rods 23 to simultaneously press against the outer wall of the workpiece, forming a uniform radial clamping force through multi-point synchronous clamping in a ring. Before clamping and positioning the workpiece, several adjusting bolts on several outer abutment parts 5 can be rotated according to the diameter of the workpiece to push several outer abutment rods 23 to make slight adjustments along the axial direction, ensuring that the workpiece can be effectively and stably clamped when the inner support part 4 and several outer abutment parts 5 work synchronously. When the outer abutment rods 23 are finely adjusted, the two limiting rods 24 slide and cooperate with the support frame 21 to prevent the outer abutment rods 23 from rotating or deviating, ensuring clamping stability.

[0050] Optionally, the drive unit 7 includes a drive motor 25 fixed in the control cavity 2, a control gear ring 26 fixed on the lower surface of the drive disk 16, a drive rod 27 fixed at the output end of the drive motor 25, a control gear 28 fixed at the other end of the drive rod 27 and meshing with the control gear ring 26, a drive gear 34 fixedly sleeved on the outside of the drive rod 27, two control lead screws 29 symmetrically rotatably mounted in the control cavity 2 and threadedly connected to the top support frustum 8, transmission gears 30 fixedly sleeved on the outside of the two control lead screws 29 respectively, and a transmission belt 31 meshing with the drive gear 34 and the outside of the two transmission gears 30; in use, the drive motor 25 The drive rod 27 rotates, and the control gear 28 on the drive rod 27 meshes with the control gear ring 26, causing the drive disk 16 to rotate, which in turn drives the translation part 6 to work. At the same time as the drive rod 27 rotates, the drive gear 34 on the drive rod 27 drives two transmission gears 30 to rotate through the transmission belt 31. The transmission gears 30 are fixed on the control screw 29. The two transmission gears 30 drive the two screws to rotate respectively, causing the top support truncated cone 8 to move up and down along the guide rod 13, which in turn drives the inner support part 4 to work. A single motor can simultaneously control the inner and outer clamping of the workpiece. The structure is compact, reducing energy consumption and equipment costs, and ensuring the synchronicity of the clamping work to prevent workpiece deformation caused by asynchronous clamping.

[0051] Optionally, the outer wall of the top support truncated cone 8 is provided with a number of sets of abutting balls 32 arranged in a ring to abut against the inner support blocks 11. When the inner support blocks 11 move in the sliding grooves 10, the sets of abutting balls 32 can reduce the sliding friction between the inner support blocks 11 and the top support truncated cone 8, realize rolling friction, effectively reduce wear, extend the service life of the top support truncated cone 8 and the inner support blocks 11, and ensure the smoothness of the movement of the inner support blocks 11, thus ensuring clamping accuracy.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A thin-walled part machining tooling fixture, characterized by, include: A processing table (1) is provided with a control cavity (2) inside the processing table (1), and an inner support seat (3) is fixedly connected to the upper surface of the processing table (1). Inner support part (4); the inner support part (4) is disposed in the inner support seat (3) and the control cavity (2); The outer abutment (5) is arranged in a ring array outside the inner support (3) and corresponds to the inner support (4); Translation part (6), the translation part (6) is disposed on the processing table (1) and fixed with a plurality of the outer abutment parts (5); A drive unit (7) is installed in the control cavity (2) and connected to the inner support unit (4) and the translation unit (6), wherein... The driving part (7) is driven, and the translation part (6) can drive several translation parts (6) to move horizontally synchronously, approaching or moving away from the inner support part (4). The inner support part (4) can move in the inner support seat (3), approaching or moving away from several outer abutments (5).

2. The tooling for machining thin-walled parts as described in claim 1, characterized in that, The inner support part (4) includes a top support frustum (8) disposed in the control cavity (2), a control groove (9) opened in the inner support seat (3) and adapted to the top support frustum (8), a plurality of sliding grooves (10) arranged in a ring array in the inner support seat (3) and all connected to the control grooves (9), a plurality of inner support blocks (11) respectively fitted and slidably inserted in the plurality of sliding grooves (10), a plurality of control inclined grooves (12) respectively opened on the plurality of inner support blocks (11) and adapted to the outer wall of the top support frustum (8), a guide rod (13) fixed in the control groove (9), and a guide groove (14) opened on the top support frustum (8) and adapted to the guide rod (13).

3. The tooling for machining thin-walled parts as described in claim 2, characterized in that, The inner support (4) also includes a plurality of return springs (15) respectively disposed in a plurality of the plurality of the slide grooves (10). One end of the return spring (15) is fixed to the inner wall of the slide groove (10), and the other end is fixed to the inner support block (11); When the top support truncated cone (8) moves upward and pushes the inner support block (11) to move in the slide groove (10) under the guidance of the control groove (12), the return spring (15) is compressed.

4. The tooling for machining thin-walled parts as described in claim 3, characterized in that, The translation unit (6) includes a drive disk (16) rotatably mounted in the control cavity (2), a plurality of translation slots (17) arranged in a ring array on the upper surface of the processing table (1), a plurality of sliders (18) slidably mounted in the plurality of translation slots (17), a plurality of push blocks (19) fixed to the bottom of the plurality of sliders (18), a plurality of drive slots (20) arranged in a ring array on the drive disk (16) and for the plurality of push blocks (19) to move; and a plurality of support wheels (33) rotatably connected to the outside of the plurality of push blocks (19) and adapted to the plurality of drive slots (20). The driving slots (20) are respectively inclined relative to the translation slots (17).

5. The tooling for machining thin-walled parts as described in claim 4, characterized in that, The outer abutment (5) includes a support frame (21) fixed to the upper end of one of the sliders (18) and abutting against the upper surface of the processing table (1), an adjusting bolt (22) threadedly connected to the support frame (21), an outer abutment rod (23) rotatably connected to the adjusting bolt (22), and two limiting rods (24) symmetrically fixed to the outer abutment rod (23) and slidably connected to the support frame (21).

6. The tooling for machining thin-walled parts as described in claim 4, characterized in that, The drive unit (7) includes a drive motor (25) fixed in the control cavity (2), a control gear ring (26) fixed on the lower surface of the drive disk (16), a drive rod (27) fixed at the output end of the drive motor (25), a control gear (28) fixed at the other end of the drive rod (27) and meshing with the control gear ring (26), a drive gear (34) fixedly sleeved on the outside of the drive rod (27), two control screws (29) symmetrically rotated and installed in the control cavity (2) and threadedly connected to the top support truncated cone (8), transmission gears (30) fixedly sleeved on the outside of the two control screws (29), and a transmission belt (31) meshing with the drive gear (34) and the outside of the two transmission gears (30).

7. The tooling for machining thin-walled parts as described in claim 6, characterized in that, The outer wall of the top support truncated cone (8) is provided with a number of sets of abutting balls (32) arranged in a ring to abut against a number of inner support blocks (11).

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