Clamp capable of fixing curved surface workpiece

Abstract

The utility model discloses a fixture capable of fixing curved surface workpieces, which comprises a bottom plate, a plurality of inner clamping mechanisms, a plurality of outer clamping mechanisms and a plurality of supporting mechanisms, and the plurality of inner clamping mechanisms, the plurality of outer clamping mechanisms and the plurality of supporting mechanisms are all arranged on the same bottom surface of the bottom plate; the multiple inner clamping mechanisms are collinearly arranged in the middle of the bottom plate in the width direction of the bottom plate, the multiple outer clamping mechanisms surround the multiple inner clamping mechanisms and are arranged on the periphery of the bottom plate, and the multiple outer clamping mechanisms face the inner clamping mechanisms; the multiple supporting mechanisms are distributed on the bottom plate, each supporting mechanism comprises a supporting part and at least one floating part, the supporting parts are fixed to the bottom plate, and the floating parts are telescopically arranged at the top ends of the supporting parts. The telescopic floating part is used for adapting to the shape of the surface of a workpiece, and the multiple inner clamping mechanisms and the multiple outer clamping mechanisms are used for clamping and fixing the workpiece, so that the stress of the workpiece is more uniform, the bad conditions of deformation and the like caused by non-uniform stress during machining of the workpiece are effectively prevented, and the yield of production is improved.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically to a fixture for fixing curved workpieces. Background Technology

[0002] Fixtures are devices used in mechanical manufacturing to fix and clamp workpieces, keeping them in the correct position for construction or inspection. At any step in the process, fixtures can be used to quickly, conveniently, and safely install workpieces. The manufacturing and assembly precision of fixtures directly affect the processing quality of workpieces and the quality of finished products.

[0003] In the production of thin-walled curved panels, such as robotic arm base plates, automobile chassis, and signal base station housings, drilling and other processing are required on their surfaces. During processing, the panels need to be mounted on fixtures for fixation and supported by bottom supports. However, due to the uneven curved surface, the surface is subjected to pressure during processing, resulting in uneven stress on the support points. This causes overall or partial deformation of the product, leading to low yield and affecting production. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a fixture for fixing curved workpieces.

[0005] This utility model discloses a fixture for fixing curved workpieces, comprising: a base plate, multiple inner clamping mechanisms, multiple outer clamping mechanisms, and multiple support mechanisms. The multiple inner clamping mechanisms, multiple outer clamping mechanisms, and multiple support mechanisms are all located on the same bottom surface of the base plate. The multiple inner clamping mechanisms are collinearly arranged in the middle of the base plate along the width direction, and the multiple outer clamping mechanisms are arranged around the multiple inner clamping mechanisms on the periphery of the base plate, with the multiple outer clamping mechanisms facing the inner clamping mechanisms. The multiple support mechanisms are distributed on the base plate, and each support mechanism includes a support part and at least one floating part. The support part is fixed to the base plate, and the floating part is retractable and located at the top of the support part.

[0006] According to one embodiment of the present invention, each internal clamping mechanism includes two support columns and a clamping platform. The clamping platform includes a first base and a clamping block. The first base is disposed on a base plate, and the clamping block is detachably disposed on the first base. The two support columns are disposed on both sides of the first base, and there is a gap between the corresponding ends of each support column and the clamping block.

[0007] According to one embodiment of the present invention, each support column includes a second base, a first screw, a bolt, and a contact block. The second base is disposed on a base plate, and a groove is provided on the second base in the direction away from the base plate. One end of the first screw is movably disposed in the groove, and the other end of the first screw passes through the bolt and is fixedly connected to the contact block. The first screw is threadedly connected to the bolt.

[0008] According to one embodiment of the present invention, the external clamping mechanism includes a fixed base, a first protrusion, a pressing drive, and a pressing block. The fixed base is fixed to the base plate, the first protrusion is fixed to the top of the fixed base, the pressing drive is disposed on one side of the fixed base, one end of the pressing block is connected to the driving end of the pressing drive, and the other end of the pressing block faces the top surface of the first protrusion.

[0009] According to one embodiment of the present invention, the support part includes a support cylinder, a pneumatic cylinder and a pressure relief valve. An air inlet and an air outlet are provided on the side of the support cylinder, and an installation hole is provided on the top of the support cylinder. The pneumatic cylinder is connected to the air inlet, and the pressure relief valve is provided at the air outlet. One end of the floating part is movably disposed in the installation hole, and the other end of the floating part protrudes outside the installation hole.

[0010] According to one embodiment of the present invention, the top of the support part is provided with at least one mounting groove, each floating part includes a floating block and a telescopic adjustment member, each mounting groove is provided with a telescopic adjustment member, the telescopic adjustment member is connected to a floating block, and the floating block is exposed outside the mounting groove.

[0011] According to one embodiment of the present invention, the telescopic adjustment component includes a first spring and a second screw. One end of the second screw is fixed in the mounting groove, and the other end of the second screw is slidably connected to a floating block. The first spring is sleeved on the second screw and is located between the bottom of the floating block and the bottom of the mounting groove.

[0012] According to one embodiment of the present invention, the telescopic adjustment component includes a fixing component and a plurality of second springs. The support portion has at least one through hole along the thickness direction, and each through hole passes through a mounting groove. One end of the floating block has a limiting hole, and the inner diameter of the limiting hole along the longitudinal direction is larger than the outer diameter of the fixing component. One end of the second spring is located in the mounting groove, and the other end of the second spring passes through the floating block. The end of the floating block with the limiting hole is embedded in the mounting groove, and the fixing component passes through the limiting hole and the through hole.

[0013] According to one embodiment of the present invention, the support portion further includes a second protrusion, which is located on the side of the other end of the floating block that is exposed outside the mounting groove, and the second protrusion is lower than the height of the floating block.

[0014] The beneficial effects of this utility model are as follows: by setting a retractable floating part of the support mechanism to adapt to the shape of the workpiece surface, the workpiece is supported after the floating part adapts to the expansion and contraction, so that the workpiece is subjected to more uniform force, thereby effectively preventing the workpiece from deforming or other defects due to uneven force during processing. In addition, multiple inner clamping mechanisms and multiple outer clamping mechanisms clamp and fix the workpiece, preventing the workpiece from moving during processing and causing deformation or poor processing accuracy, thereby improving the yield rate of production. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is a schematic diagram of a fixture that can fix a curved workpiece.

[0017] Figure 2 This is a schematic diagram of the internal clamping mechanism in the embodiment;

[0018] Figure 3 This is a cross-sectional view of the support column in the embodiment;

[0019] Figure 4 This is a schematic diagram of the external clamping mechanism in the embodiment;

[0020] Figure 5 This is a cross-sectional view of the external clamping mechanism in the embodiment;

[0021] Figure 6 This is a first schematic diagram of the support mechanism in the embodiment;

[0022] Figure 7 This is a first cross-sectional view of the support mechanism in the embodiment;

[0023] Figure 8 This is a second schematic diagram of the support mechanism in the embodiment;

[0024] Figure 9 This is a second sectional view of the support mechanism in the embodiment;

[0025] Figure 10 This is an exploded view of the support mechanism in the embodiment;

[0026] Figure 11 This is a third schematic diagram of the support mechanism in the embodiment;

[0027] Figure 12 This is another exploded view of the support mechanism in the embodiment.

[0028] Explanation of reference numerals in the attached figures

[0029] 1. Base plate;

[0030] 2. Internal clamping mechanism; 21. Support column; 211. Second base; 2111. Groove; 212. First screw; 213. Bolt; 214. Contact block; 22. Clamping table; 221. First base; 222. Clamping block; 23. Spacing;

[0031] 3. External clamping mechanism; 31. Fixed base; 32. First protrusion; 321. Top surface; 33. Press drive; 331. Drive end; 34. Press block;

[0032] 4. Support mechanism; 41. Support part; 411. Support cylinder; 4111. Air inlet; 4112. Air outlet; 4113. Mounting hole; 412. Mounting groove; 413. Through hole; 414. Second protrusion; 42. Floating part; 421. Floating block; 4211. Limiting hole; 422. Telescopic adjustment component; 4221. First spring; 4222. Second screw; 4223. Fixing component; 4224. Second spring. Detailed Implementation

[0033] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0034] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] Please see Figure 1 As shown, Figure 1 This utility model discloses a fixture for fixing curved workpieces, including a base plate 1, multiple inner clamping mechanisms 2, multiple outer clamping mechanisms 3, and multiple support mechanisms 4. The multiple inner clamping mechanisms 2 are disposed on the base plate 1 and are used to provide support force for the workpiece and fix the workpiece. The multiple outer clamping mechanisms 3 are arranged around the periphery of the base plate 1 and are used to clamp the periphery of the workpiece, so that the workpiece is fixed and not easy to move. The multiple support mechanisms 4 are distributed on the base plate 1 and are used to provide support force for the workpiece.

[0036] Each support mechanism 4 includes a support part 41 and at least one floating part 42. The support part 41 is fixedly mounted on the base plate 1. One end of the floating part 42 is telescopically mounted on the top of the support part 41, while the other end of the floating part 42 protrudes from the support part 41 and contacts the workpiece.

[0037] In practical applications, the workpiece is placed on the fixture that can fix curved workpieces. The retractable floating part 42 adapts to the shape of the workpiece surface. After the floating part 42 adapts to the expansion and contraction, it supports the workpiece, making the workpiece more uniformly stressed. This effectively prevents the workpiece from deforming or other defects due to uneven stress during processing. Then, multiple inner clamping mechanisms 2 fix the middle of the workpiece, and multiple outer clamping mechanisms 3 arranged around the periphery of the base 1 clamp and fix the outer periphery of the workpiece, preventing the workpiece from moving during processing and causing deformation or poor processing accuracy, thereby improving the yield rate of production.

[0038] Further, please refer to Figure 2 As shown, Figure 2 This is a schematic diagram of the internal clamping mechanism in the embodiment. In this embodiment, each internal clamping mechanism 2 includes two support columns 21 and a clamping platform 22. The clamping platform 22 includes a first base 221 and a clamping block 222. The first base 221 is fixedly mounted on the base plate 1, and the clamping block 222 is detachably mounted on the first base 221, with the length of the clamping block 222 being greater than the length of the first base 221. The two support columns 21 are respectively located on both sides of the first base 221, and there is a gap 23 between the corresponding ends of each support column 21 and the clamping block 222. When it is necessary to fix the workpiece, the workpiece is first placed on the two support columns 21, and then the clamping block 222 is gradually locked to the first base 221, and the workpiece is then clamped in the gap 23 between the clamping block 222 and the support column 21. The two support columns 21 located at both ends of the first base 221 provide support for the workpiece. The cooperation between the first base 221, the clamping block 222, and the support columns 21 clamps and fixes the workpiece, preventing it from moving during processing and causing deformation or poor processing accuracy. In this example, the first base 221 and the clamping block 222 are fixed with screws for easy disassembly and installation.

[0039] Further, please refer to Figure 3 As shown, Figure 3This is a cross-sectional view of the support column in the embodiment. In this embodiment, each support column 21 includes a second base 221, a first screw 212, a bolt 213, and a contact block 214. The second base 211 is fixedly mounted on the base plate 1, and a groove 2111 is formed on the second base 211 away from the base plate 1. One end of the first screw 212 is movably disposed in the groove 2111, and the other end of the first screw 212 passes through the bolt 213 and is fixedly connected to the contact block 214. The first screw 212 and the bolt 213 are threadedly connected. By adjusting and rotating the first screw 212, the contact block 214 moves away from the second base 211, while the bolt 213 moves in the opposite direction. When the contact block 214 contacts the workpiece, the rotation of the first screw 212 stops, and the bolt 213 locks the first screw 212 in place. That is, the cooperation between the first screw 212 and the bolt 213 provides support force to the contact block 214 to support the workpiece.

[0040] Further, please refer to Figure 4 and Figure 5 As shown, Figure 4 This is a schematic diagram of the external clamping mechanism in the embodiment. Figure 5 This is a cross-sectional view of the external clamping mechanism in the embodiment. In this embodiment, each external clamping mechanism 3 includes a fixed base 31, a first protrusion 32, a pressing drive 33, and a pressing block 34. The fixed base 31 is fixedly mounted on the base plate 1, the first protrusion 32 is located on the top of the fixed base 31, the pressing drive 33 is located on the side of the fixed base 31 away from the support column 2, one end of the pressing block 34 is fixedly connected to the driving end 331 of the pressing drive 33, and the other end of the pressing block 34 faces the top surface 321 of the first protrusion 32. In use, the workpiece is placed on the fixture that can fix the curved workpiece, with the periphery of the workpiece located between the pressing block 34 and the first protrusion 32. The pressing drive 33 is activated, driving the pressing block 34 to move closer to the first protrusion 32, thereby clamping the workpiece located between the pressing drive 33 and the pressing block 34, thus fixing the workpiece and preventing it from moving during processing, which could lead to deformation or poor processing accuracy. Similarly, the pressing drive 33 drives the pressing block 34 to move away from the first protrusion 32, thereby releasing the workpiece located between the pressing block 34 and the first protrusion 32. Specifically, the pressing drive 33 is a cylinder.

[0041] Further, please refer to Figure 6 and Figure 7 As shown, Figure 6 This is a first schematic diagram of the support mechanism in the embodiment. Figure 7This is a first cross-sectional view of the support mechanism in one embodiment. In one embodiment, the support part 41 includes a support cylinder 411, a pneumatic cylinder, and a pressure relief valve. The support cylinder 411 has an air inlet 4111 and an air outlet 4112 on its side. Additionally, the support cylinder 411 has a mounting hole 4113 on its top. The pneumatic cylinder is connected to the air inlet 4111, and the pressure relief valve is located at the air outlet 4112. One end of the floating part 42 is movably disposed within the mounting hole 4113, while the other end of the floating part 42 protrudes outside the mounting hole 4113. In use, the pneumatic cylinder is activated, driving the floating part 42 to move away from the base plate 1 through the air inlet until it contacts the workpiece and stops, providing support for the workpiece and making the force on the workpiece more even.

[0042] Further, please refer to Figures 8 to 10 As shown, Figure 8 This is a second schematic diagram of the support mechanism in the embodiment. Figure 9 This is a second sectional view of the support mechanism in the embodiment. Figure 10 The image shows an exploded view of the support mechanism in one embodiment. In another embodiment, the top of the support part 41 has at least one mounting groove 412. Each floating part 42 includes a floating block 421 and a telescopic adjustment member 422. Each mounting groove 412 contains a telescopic adjustment member 422, which is connected to a floating block. The floating block 421 protrudes outside the mounting groove 412. The telescopic adjustment member 422 can adjust the floating block 421 to extend and retract. After the floating block 421 extends and retracts adaptively, it supports the workpiece, making the workpiece more evenly stressed. This effectively prevents the workpiece from deforming or other defects during processing due to uneven stress. After the workpiece is removed, the telescopic adjustment member 422 can reset the floating block 421.

[0043] Specifically, in this embodiment, the telescopic adjustment member 422 includes a first spring 4221 and a second screw 4222. One end of the second screw 4222 is fixed in the mounting groove 412, and the other end of the second screw 4222 is slidably connected to the floating block 421. The first spring 4221 is sleeved on the second screw 4222, and the first spring 4221 is located between the bottom of the floating block 421 and the bottom of the mounting groove 412.

[0044] Furthermore, review Figure 10As shown, in this embodiment, the telescopic adjustment member 422 includes a fixing member 4223 and a plurality of second springs 4224. The support portion 41 is provided with at least one through hole 413 along the thickness direction, and each through hole 413 passes through a mounting groove 412. The floating block 421 is provided with a limiting hole 4211 at one end, and the inner diameter of the limiting hole 4211 along the longitudinal direction is larger than the outer diameter of the fixing member 4223. One end of the second spring 4224 is located in the mounting groove 412, and the other end of the second spring 4224 passes through the floating block 421. The end of the floating block 421 with the limiting hole 4211 is embedded in the mounting groove 412, and the fixing member 4223 passes through the limiting hole 4211 and the through hole 413, meaning that the floating block 421 can move within the range of the limiting hole 4211.

[0045] Further, please refer to Figure 11 and Figure 12 As shown, Figure 11 This is a third schematic diagram of the support mechanism in the embodiment. Figure 12 This is another exploded view of the support mechanism in the embodiment. In this embodiment, the support portion 41 further includes a second protrusion 414, which is located on the side of the floating block 421 that protrudes from the mounting groove 412, and the second protrusion 414 is lower than the height of the floating block 421. Specifically, the shape of the floating block 421 protruding from the second mounting groove 412 matches the shape of the workpiece contact surface, making the workpiece more evenly stressed, while the second protrusion 414 provides support for the contacted workpiece portion.

[0046] In practical applications, the workpiece is placed on the fixture that can fix curved workpieces. The workpiece contacts the floating block 421, which adapts to the shape of the workpiece surface through its retractable shape. After the adaptive expansion and contraction of the floating block 421, the workpiece is supported, making the force on the workpiece more uniform. This effectively prevents the workpiece from deforming or other defects due to uneven force during processing. In addition, when the pressing drive 33 is activated, it drives the pressing block 34 to move closer to the workpiece located on the first protrusion 32, thereby clamping and fixing the workpiece located on the first protrusion 32 and the pressing block 34. To prevent workpieces from moving during processing, which could lead to deformation or poor processing accuracy, the first screw 212 is adjusted and rotated to move towards the workpiece, so that the contact block 214 moves towards the workpiece and is in close contact with it, thus providing support for the workpiece. The clamping block 222 is placed on the first base 221, and then the clamping block 222 and the first base 221 are locked, thereby clamping and fixing the workpiece in the gap 23 between the clamping block 222 and the support column 21, preventing the workpiece from moving during processing and causing deformation, thereby improving the yield rate of production.

[0047] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this 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 principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A fixture for holding a curved workpiece, comprising: The utility model relates to a kind of inner clamping mechanism, outer clamping mechanism and support mechanism of wafer carrier, including: Bottom plate (1), multiple inner clamping mechanisms (2), multiple outer clamping mechanisms (3) and multiple support mechanisms (4), multiple inner clamping mechanisms (2), multiple outer clamping mechanisms (3) and multiple support mechanisms (4) are all arranged in the same bottom surface of the bottom plate (1);Multiple the inner clamping mechanism (2) is arranged in the middle of the bottom plate (1) along the width direction of the bottom plate (1) collinearly, multiple the outer clamping mechanism (3) is arranged at the periphery of the bottom plate (1) around multiple the inner clamping mechanism (2), and multiple the outer clamping mechanism (3) is towards the inner clamping mechanism (2);Multiple the support mechanism (4) is distributed on the bottom plate (1), and each support mechanism (4) includes support part (41) and at least one floating part (42), the support part (41) is fixed to the bottom plate (1), and the floating part (42) is telescopically arranged at the top end of the support part (41).

2. The fixture of claim 1, wherein, Each the inner clamping mechanism (2) includes two support columns (21) and a clamping table (22), the clamping table (22) includes first base (221) and clamping block (222), the first base (221) is arranged on the bottom plate (1), the length of the clamping block (222) is greater than the first base (221) and can be detachably arranged on the first base (221), two the support column (21) is divided and arranged at the two sides of the first base (221), and each the support column (21) has spacing (23) between the corresponding end of the clamping block (222).

3. The fixture of claim 2, wherein, Each the support column (21) includes second base (211), first screw (212), bolt (213) and contact block (214), the second base (211) is arranged on the bottom plate (1), the second base (211) is provided with recess (2111) in the direction away from the bottom plate (1), one end of the first screw (212) is movably arranged in the recess (2111), the other end of the first screw (212) passes through the bolt (213) and is fixedly connected with the contact block (214), and the first screw (212) is threadedly connected with the bolt (213).

4. The fixture of claim 1, wherein, The outer clamping mechanism (3) includes fixed seat (31), first protrusion (32), pressing drive (33) and pressing block (34), the fixed seat (31) is fixed to the bottom plate (1), the first protrusion (32) is fixed to the top of the fixed seat (31), the pressing drive (33) is arranged on one side of the fixed seat (31), one end of the pressing block (34) is connected to the driving end (331) of the pressing drive (33), and the other end of the pressing block (34) faces the top surface (321) of the first protrusion (32).

5. The fixture of claim 1, wherein, The support part (41) comprises a support cylinder (411), an air cylinder and a pressure relief valve, the support cylinder (411) is provided with an air inlet (4111) and an air outlet (4112) on the side, the support cylinder (411) is provided with a mounting hole (4113) on the top, the air cylinder is connected with the air inlet (4111), the pressure relief valve is arranged on the air outlet (4112), one end of the floating part (42) is movably arranged in the mounting hole (4113), and the other end of the floating part (42) is exposed outside the mounting hole (4113).

6. The fixture of claim 1, wherein, The top of the support part (41) is provided with at least one mounting groove (412), each floating part (42) comprises a floating block (421) and a telescopic adjusting piece (422), each mounting groove (412) is provided with the telescopic adjusting piece (422), the telescopic adjusting piece (422) is connected with the floating block (421), and the floating block (421) is exposed outside the mounting groove (412).

7. The fixture of claim 6, wherein, The telescopic adjusting piece (422) comprises a first spring (4221) and a second screw rod (4222), one end of the second screw rod (4222) is fixed in the mounting groove (412), the other end of the second screw rod (4222) is slidably connected with the floating block (421), the first spring (4221) is sleeved on the second screw rod (4222), and the first spring (4221) is located between the bottom of the floating block (421) and the bottom of the mounting groove (412).

8. The fixture of claim 6, wherein, The telescopic adjusting piece (422) comprises a fixing piece (4223) and a plurality of second springs (4224), the support part (41) is provided with at least one through hole (413) in the thickness direction, each through hole (413) penetrates the mounting groove (412); one end of the floating block (421) is provided with a limiting hole (4211), the inner diameter of the limiting hole (4211) in the longitudinal direction is greater than the outer diameter of the fixing piece (4223); one end of the second spring (4224) is arranged in the mounting groove (412), and the other end of the second spring (4224) penetrates into the floating block (421); one end of the floating block (421) provided with the limiting hole (4211) is embedded in the mounting groove (412), and the fixing piece (4223) is arranged in the limiting hole (4211) and the through hole (413).

9. The fixture of claim 7, wherein, The support part (41) further comprises a second protrusion (414), the second protrusion (414) is located on one side of the other end of the floating block (421) exposed outside the mounting groove (412), and the second protrusion (414) is lower than the height of the floating block (421).

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