Flexible clamp applied to thin-wall part

Abstract

The invention belongs to the field of clamps, and provides a flexible clamp applied to a thin-walled workpiece, which comprises a base plate, a placing table, and sliding table mechanisms, position adjusting mechanisms, telescopic mechanisms and locking mechanisms which are symmetrically distributed on the two sides of the placing table; the placing table is arranged on the base plate, and a workpiece to be machined is fixed to the placing table in a vertical posture. The position adjusting mechanism is movably arranged on the sliding table mechanism, and a ball bowl and a profiling block are arranged on the position adjusting mechanism. Compared with the prior art, the clamp has the advantages that the flexibility of the clamp is improved through the ball bowl with the angle being adjusted in a universal mode and matching with the profiling piece, and the requirement for stable clamping of different positions of a thin-wall part is met; and meanwhile, under the one-time pressing action of the unlocking handle, locking of the position where the profiling block is located can be completed on one hand and tensioning of the fixing rod and the sliding table mechanism can be completed on the other hand under locking of the two dead point positions, and therefore guarantee is provided for the accuracy and stability when the profiling block clamps the workpiece.

Description

Technical Field

[0001] The present invention belongs to the field of jigs, and particularly relates to a flexible jig applied to thin-walled parts. Background Art

[0002] Due to their lightweight and high-strength characteristics, thin-walled parts are widely used in key components of mechanical equipment. However, thin-walled parts have complex structures and low stiffness, and are prone to deformation and vibration during the machining process due to uneven clamping force or positioning deviation, resulting in accuracy loss and increased scrap rate.

[0003] Although the existing jig technologies have made certain progress, there are still many deficiencies in terms of versatility, efficiency, and intelligence level. Due to the special structure of thin-walled parts, the jig needs to achieve machining at different positions through multiple clamping methods. If the clamping force distribution is uneven, local stress concentration is extremely likely to cause workpiece deformation, thereby affecting the machining accuracy. Most of the existing jigs are combined jigs, that is to say, a certain degree of flexibility is achieved through modular components, but manual adjustment of the position is required frequently. While the efficiency is low, the fitting degree for complex curved thin-walled parts cannot be effectively guaranteed, and it is difficult to meet the requirements of high precision and multi-size adaptability, ultimately affecting the overall machining quality of thin-walled parts. Summary of the Invention

[0004] Aiming at the above deficiencies existing in the prior art, the technical problem to be solved by the present invention is to propose a flexible jig applied to thin-walled parts with a simple overall structure, convenient and fast operation, and improved flexibility.

[0005] The technical solution adopted by the present invention to solve its technical problems is to propose a flexible jig applied to thin-walled parts for clamping a non-flat workpiece to be machined, including a substrate, a placement table, and a slide mechanism, an adjustment mechanism, a telescopic mechanism, and a locking mechanism that are symmetrically distributed on both sides of the placement table;

[0006] The placement table is arranged on the substrate, and the workpiece to be machined is fixed on the placement table in a vertical posture;

[0007] The adjustment mechanism is movably arranged on the slide mechanism. A ball bowl and a profiling block are arranged on the adjustment mechanism. The profiling block is connected to the ball bowl and can be actively attached to the side wall of the workpiece when adjusting its relative position with the adjustment mechanism in the ball bowl; the slide mechanism is movably arranged on the substrate and is used to drive the adjustment mechanism to approach or move away from the placement table, so that the profiling block can be actively attached to different height positions on the side wall of the workpiece;

[0008] The telescopic mechanism is movably connected to the adjustment mechanism to adapt to the distance between the slide mechanism and the placement table;

[0009] The locking mechanism includes a driving arm and a pressing block. A first connecting plate is movably arranged between the driving arm and the locking mechanism. A second connecting plate is movably arranged between the driving arm and the telescopic mechanism. The connection between the second connecting plate and the telescopic mechanism is movably arranged on the locking mechanism together. When the driving arm drives the pressing block to move and press the sliding table mechanism, the first connecting plate can form a first dead point with the driving arm, and at the same time, the second connecting plate is linked to form a second dead point with the driving arm.

[0010] When the driving arm drives the pressing block to move and press the position adjusting mechanism, the first dead point is used to limit the displacement of the position adjusting mechanism relative to the substrate, and the second dead point is linked to lock the sliding table mechanism and the ball bowl, so that the profiling block can clamp the workpiece.

[0011] In the above-mentioned flexible fixture applied to thin-walled parts, the driving arm is composed of a driving part, an extending part and an unlocking handle which are all arranged at an angle to each other. The common connection point of the driving part, the extending part and the unlocking handle is movably hinged to the first connecting plate.

[0012] In the above-mentioned flexible fixture applied to thin-walled parts, the telescopic mechanism includes:

[0013] A sliding seat which is movably arranged in the sliding table mechanism and is movably connected to the position adjusting mechanism;

[0014] A rotating rod and an adjusting rod. One end of the rotating rod is movably hinged to the sliding seat, and the other end forms an adjusting hole. One end of the adjusting rod forms a connecting column and a scale indicating block on both side walls respectively. The connecting column can pass through the adjusting hole and be connected by a fastener. The scale indicating block is used to display the overall length of the adjusting rod and the rotating rod. The other end of the adjusting rod and the second connecting plate are movably arranged on the locking mechanism together.

[0015] In the above-mentioned flexible fixture applied to thin-walled parts, a guide rail is arranged vertically on the locking mechanism. A moving seat is movably clamped on the guide rail. One end of the second connecting plate is movably hinged to the extending part. The other end of the second connecting plate and the end of the adjusting rod far from the rotating rod are jointly hinged to the moving seat, so that the second dead point is formed when the second connecting plate and the extending part are collinear.

[0016] In the above-mentioned flexible fixture applied to thin-walled parts, the position adjusting mechanism further includes:

[0017] A support block. One end of the support block is movably arranged in the sliding table mechanism, and the other end forms a spherical groove. The ball bowl is movably connected in the spherical groove.

[0018] A fixed rod is arranged inside the support block. A locking block is formed at one end of the fixed rod. The locking block is movably attached to the inner wall of the ball bowl to limit the rotation of the ball bowl in the spherical groove. The other end of the fixed rod is movably connected to the sliding seat.

[0019] In the above flexible fixture applied to thin-walled parts, two semi-limiting rings are also detachably connected to the end of the support block close to the placement table. When the semi-limiting rings are pressed against each other, they can limit the ball bowl from disengaging from the spherical groove.

[0020] In the above flexible fixture applied to thin-walled parts, the locking mechanism further includes:

[0021] A support plate is arranged on the placement table. One end of the first connecting plate is movably hinged to the support plate, and the other end is hinged to the common connection point of the driving part, the extending part, and the unlocking handle, so as to form the first dead point when the driving part and the first connecting plate are collinear.

[0022] A rotating block has one end hinged to the support plate and the other end hinged to the driving part. A U-shaped extension rod is vertically connected to the rotating block.

[0023] An upper cover plate is connected to the bottom of the pressing block. An extension column is formed on the pressing block. The extension column penetrates through the U-shaped extension rod and is locked and fixed by a connecting piece, so that when the rotating block rotates, it can drive the pressing block to rotate synchronously through the U-shaped extension rod to press the upper cover plate against the sliding table mechanism and limit the displacement of the support block relative to the substrate.

[0024] In the above flexible fixture applied to thin-walled parts, a guide post and an elastic member are also arranged inside the upper cover plate. The elastic member is sleeved on the guide post. A guide groove is formed in the sliding table mechanism. The elastic member can be inserted into the guide groove synchronously with the guide post, so that the upper cover plate is movably attached to the sliding table mechanism.

[0025] In the above flexible fixture applied to thin-walled parts, the sliding table mechanism includes:

[0026] Sliders. Slide rails distributed on both sides of the placement table are installed on the substrate. The sliders are movably clamped to the slide rails.

[0027] A lower cover plate is arranged on the slider. A profiling groove is formed inside the lower cover plate. A rotating shaft is formed at the end of the support block. The rotating shaft is movably installed in the profiling groove.

[0028] In the above-mentioned flexible fixture applied to thin-walled parts, a limiting groove is provided inside the lower cover plate. The sliding seat includes a clamping block and a connecting arm. The rotating rod is connected to the clamping block, and the clamping block is movably clamped in the limiting groove. The connecting arm is arranged on one side of the clamping block. The rotating shaft is provided with an arc-shaped avoidance groove along its radial direction. The connecting arm extends into the arc-shaped avoidance groove and is movably connected to the fixed rod.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The flexible fixture applied to thin-walled parts of the present invention improves the flexibility of the fixture by means of a ball bowl with universal angle adjustment and is equipped with a profiling piece to meet the stable clamping of thin-walled parts at different positions. At the same time, under a single pressing action of the unlocking handle, the fixture can be locked at two dead points. On the one hand, the position of the profiling block is locked, and on the other hand, the fixed rod and the slide table mechanism are tightened, thereby ensuring the accuracy and stability of the profiling block when clamping the workpiece.

[0031] (2) The design of the scale indicating block enables the operator to precisely adjust the overall length of the rotating rod and the adjusting rod, so as to adapt to the stable clamping of the workpiece by the profiling block at different positions, effectively avoiding the problem of position interference between components. At the same time, the locking force of the ball bowl can be completed under the formation of the second dead point, preventing deformation during clamping and ensuring the machining accuracy of the thin-walled parts.

[0032] (3) The guide post plays a certain guiding and limiting role when the upper cover plate is movably attached to the lower cover plate. At the same time, under the buffering action of the elastic member, the collision damage between components is effectively prevented, thereby extending the service life of the fixture.

[0033] (4) The clamping cooperation between the slider and the slide rail can complete the locking function by means of the clamping block pressing against the inner wall of the limiting groove. The overall structure is simple, and the mechanical structure replaces the traditional electric drive structure, effectively avoiding the influence of external uncertain factors on the clamping accuracy and stability of the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic structural diagram when the workpiece to be machined is located on the placement table;

[0035] Figure 2 is a schematic diagram of the overall structure of the present application;

[0036] Figure 3 is a schematic installation structure diagram of the locking mechanism;

[0037] Figure 4 is a schematic installation structure diagram among the locking mechanism, the slide table mechanism, the position adjustment mechanism, and the telescopic mechanism;

[0038] Figure 5 yes Figure 4 Sectional view of EE in the figure;

[0039] Figure 6 It is a schematic diagram of the installation structure between two half limit rings, the ball bowl and the contour block;

[0040] Figure 7 It is an exploded view of the rotating rod, adjusting rod, supporting block, and the space between the sliding seat and the lower cover.

[0041] In the figure, 1, workpiece;

[0042] 2. Base plate; 20. Placement table; 21. Slide rail;

[0043] 3. Positioning mechanism; 30. Ball bowl; 31. Imitation block; 32. Support block; 320. Spherical groove; 321. Rotating shaft; 321a. Arc-shaped avoidance groove; 33. Fixed rod; 330. Locking block; 34. Semi-limiting ring;

[0044] 4. telescopic mechanism; 40. sliding seat; 400. engaging block; 401. connecting arm; 41. rotating rod; 410. adjusting hole; 42. adjusting rod; 420. connecting column; 421. scale indicator block;

[0045] 5. Locking mechanism; 50. Driving arm; 500. Driving part; 501. Extension part; 502. Unlocking handle; 51. Pressing block; 510. Extension column; 52. First connecting plate; 520. First dead point; 53. Second connecting plate; 530. Second dead point; 54. Guide rail; 55. Moving seat; 56. Support plate; 560. Make way groove; 561. Support rod; 57. Rotating block; 570. U-shaped extension rod; 58. Upper cover plate; 580. Guide column; 581. Elastic member;

[0046] 6. Slide mechanism; 60. Sliding block; 61. Lower cover plate; 610. Contour groove; 611. Limiting groove; 612. Guide groove. DETAILED DESCRIPTION

[0047] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0048] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] like Figures 1 to 7As shown in the figure, a flexible fixture for thin-walled parts according to the present invention is used to clamp a non-flat workpiece 1 to be machined, and includes a substrate 2, a placement table 20, and a slide mechanism 6, an adjustment mechanism 3, a telescopic mechanism 4, and a locking mechanism 5 that are symmetrically distributed on both sides of the placement table 20.

[0050] Among them, the placement table 20 is arranged on the substrate 2, and the workpiece 1 to be machined is fixed on the placement table 20 in a vertical posture; the adjustment mechanism 3 is movably arranged on the slide mechanism 6, and a ball bowl 30 and a profiling block 31 are arranged on the adjustment mechanism 3. The profiling block 31 is connected to the ball bowl 30 and can be in contact with the side wall of the workpiece 1 when adjusting its relative position with the adjustment mechanism 3 in the ball bowl 30; the slide mechanism 6 is movably arranged on the substrate 2 and is used to drive the adjustment mechanism 3 to approach or move away from the placement table 20 so that the profiling block 31 can be in contact with different height positions on the side wall of the workpiece 1; the telescopic mechanism 4 is movably connected to the adjustment mechanism 3 to adapt to the distance between the slide mechanism 6 and the placement table 20; the locking mechanism 5 includes a driving arm 50 and a pressing block 51. A first connecting plate 52 is movably arranged between the driving arm 50 and the locking mechanism 5, and a second connecting plate 53 is movably arranged between the driving arm 50 and the telescopic mechanism 4. The connection part of the second connecting plate 53 and the telescopic mechanism 4 is jointly movably arranged on the locking mechanism 5; when the driving arm 50 drives the pressing block 51 to move and press the slide mechanism 6, a first dead point 520 is formed between the first connecting plate 52 and the driving arm 50, and at the same time, the second connecting plate 53 is linked to form a second dead point 530 with the driving arm 50; when the driving arm 50 drives the pressing block 51 to move and press the adjustment mechanism 3, the first dead point 520 is used to limit the displacement of the adjustment mechanism 3 relative to the substrate 2, and the second dead point 530 is linked to lock the slide mechanism 6 and the ball bowl 30 so that the profiling block 31 can clamp the workpiece 1.

[0051] Specifically, as Figures 1 to 2 shown, the flexible fixture is composed of three sets of mechanisms for clamping the side wall of the workpiece 1 on each side of the placement table 20. First of all, it should be noted that the machining of the thin-walled part of the workpiece 1 in this embodiment is divided into three parts: upper, middle, and lower (i.e., corresponding to Figure 1 A / B / C in the figure). Through multiple clamping operations respectively, the finish machining of the upper, middle, and lower three sections can be completed in sequence. In other words, when machining the upper thin wall (i.e., Figure 1 area A in the figure), the flexible fixture is clamped on both sides of the middle part of the workpiece 1; when machining the middle thin wall (i.e., Figure 1 area B in the figure), the flexible fixture is clamped on both sides of the lower part of the workpiece 1; when machining the lower thin wall (i.e., Figure 1 area C in the figure), since it is close to the thick-walled part (i.e., Figure 1 area D in the figure) and has a certain stiffness, the finish machining can be completed without clamping. For the placement of the entire thin-walled workpiece 1, in this embodiment, the thick-walled part (i.e., Figure 1The bottom wall of the D area in ) is adhered to the placement table 20, so as to ensure that the entire thin-walled workpiece 1 is placed in a vertical posture. Preferably, the coagulant can be acetone or other chemical potions to assist the processed thin-walled workpiece 1 to be detached from the placement table 20 without damage. In addition, it should be noted that the profiling blocks 31 on both sides of the placement table 20 can be designed with convex arc surfaces or concave arc surfaces corresponding to the shape of the thin-walled workpiece 1 to be clamped actually, so as to ensure the stable clamping operation of the profiling blocks 31 on the thin-walled workpiece 1.

[0052] Furthermore, when the above-mentioned thin-walled workpiece 1 is placed on the placement table 20, the sliding table mechanism 6 can move along the length direction of the substrate 2 according to the size and shape of the workpiece 1, so that the positioning mechanism 3 can approach or move away from the placement table 20, and then the profiling blocks 31 can fit at different height positions of the workpiece 1. During this process, the positioning mechanism 3 can rotate relative to the sliding table mechanism 6. Along with the rotation of the ball bowl 30, finally the profiling blocks 31 can horizontally fit the A area / B area / C area on the side wall of the thin-walled workpiece 1 correspondingly; after the angle is adjusted, by pressing down the driving arm 50 and forcing it to rotate Figure 3 in the clockwise direction to Figure 4 the state shown, the pressing block 51 gradually presses on the sliding table mechanism 6, and at the same time, the first dead point 520 formed by the first connecting plate 52 and the driving arm 50 ensures the stability of the position of the positioning mechanism 3; at the same time, the rotation of the driving arm 50 can drive the second connecting plate 53 to form a second dead point 530. Finally, through the pulling of the positioning mechanism 3 by the telescopic mechanism 4, the ball bowl 30 and the profiling blocks 31 can complete the clamping of the side wall of the thin-walled workpiece 1 in a stable posture. It can be seen that the fixture in this embodiment through the cooperation of the ball bowl 30 and the positioning mechanism 3 ensures that the profiling blocks 31 can be adjusted to the most suitable angle to complete the stable clamping of different positions of the thin-walled workpiece 1 (that is, corresponding to Figure 1 A / B / C in ), greatly improving the flexibility and application range of the fixture; at the same time, under one locking action of the locking mechanism 5, the locking of the position of the profiling blocks 31 can be realized simultaneously by using the two dead point positions, and the sliding table mechanism 6 cooperates with the telescopic mechanism 4 to tighten the ball bowl 30, thereby providing guarantee for the accuracy and stability of the clamping of the workpiece 1 by the profiling blocks 31.

[0053] The driving arm 50 includes a driving part 500, an extension part 501 and an unlocking handle 502 which are all arranged at an angle to each other, and the common connection part of the driving part 500, the extension part 501 and the unlocking handle 502 is movably hinged to the first connecting plate 52.

[0054] As Figure 3 and Figure 4As shown in the figure, when it is necessary to clamp the thin-walled workpiece 1 on the placement table 20, the unlocking handle 502 can be rotated synchronously with the driving part 500 and the extension part 501 under the action of an external force (which can be manual operation). Since the driving part 500, the extension part 501 and the unlocking handle 502 are arranged at a certain angle to each other, the connection points between the three are bound to change their positions with the rotation at all times. After the driving part 500 moves, the first connecting plate 52 and the second connecting plate 53 are driven simultaneously until the unlocking handle 502 reaches Figure 4 the pressing position shown in the figure. At this time, the pressing block 51 completely presses and fixes the positioning mechanism 3 in the sliding table mechanism 6. The first dead point 520 formed by the first connecting plate 52 and the driving arm 50 being collinear (on the same straight line) effectively restricts any movement of the positioning mechanism 3 relative to the substrate 2, ensuring that the profiling block 31 can stably be in the best clamping position to complete the clamping of the thin-walled workpiece 1.

[0055] The telescopic mechanism 4 includes: a sliding seat 40, which is movably arranged in the sliding table mechanism 6, and the sliding seat 40 is movably connected to the positioning mechanism 3; a rotating rod 41 and an adjusting rod 42. One end of the rotating rod 41 is movably hinged to the sliding seat 40, and the other end is formed with an adjusting hole 410; one end of the adjusting rod 42 is respectively formed with a connecting column 420 and a scale indicating block 421 on both side walls. The connecting column 420 can penetrate through the adjusting hole 410 and be connected by a fastening member, and the scale indicating block 421 is used to display the overall length of the adjusting rod 42 and the rotating rod 41; the other end of the adjusting rod 42 and the second connecting plate 53 jointly move in the locking mechanism 5.

[0056] Preferably, as Figures 3 to 5 shown in the figure, before the unlocking handle 502 is pressed down, the positioning mechanism 3 has adjusted the profiling block 31 to the required height and position through the displacement of the sliding table mechanism 6 on the substrate 2 and the rotation operation of the ball bowl 30. In order to adapt to the sliding table mechanism 6 and the positioning mechanism 3 at different positions on the substrate 2, in this embodiment, the rotating rod 41 and the adjusting rod 42 are designed as a telescopic structure. Different from the conventional mechanical structure, the user can very precisely adjust the overall length of the rotating rod 41 and the adjusting rod 42 according to the positions of the sliding table mechanism 6 and the positioning mechanism 3, as Figure 4 and Figure 7 shown in the figure. By connecting the connecting column 420 to different positions of the adjusting hole 410 and tightening the connecting column 420 with a fastening member (which can be replaced by other connecting components such as bolts and screws), the stability of the relative positions of the rotating rod 41 and the adjusting rod 42 is ensured. Just because of this, there is enough space for the positioning mechanism 3 and the sliding table mechanism 6 to ensure that the profiling block 31 can flexibly clamp the thin-walled workpiece 1 ( Figure 1The clamping operation of the A zone / B zone / C zone shown in the figure effectively avoids the jamming phenomenon caused by the relative movement between the various components, which would affect the smoothness and accuracy of clamping the thin-walled workpiece 1.

[0057] Further preferably, in this embodiment, a scale is also provided on the rotating rod 41, and the scale indication block 421 indicates the scale, so that the operator can accurately adjust the overall length of the telescopic mechanism 4, thereby providing a guarantee for the accuracy of the subsequent profiling block 31 clamping the thin-walled workpiece 1. It can be seen that through simple length adjustment, the adjustment time is reduced and the work efficiency is improved. At the same time, the combined design of the sliding seat 40, the rotating rod 41 and the adjusting rod 42 enables the telescopic mechanism 4 to flexibly adapt to workpieces 1 of different sizes and shapes, thereby improving the versatility and application range of the equipment.

[0058] A guide rail 54 is provided on the locking mechanism 5 in the vertical direction, and a movable seat 55 is movably connected to the guide rail 54. One end of the second connecting plate 53 is movably hinged to the extension portion 501, and the other end of the second connecting plate 53 and the end of the adjusting rod 42 away from the rotating rod 41 are hinged to the movable seat 55 together, so that a second dead point 530 is formed when the second connecting plate 53 and the extension portion 501 are in line.

[0059] like Figure 3 and Figure 4 As shown, as the user applies a downward pressing force to the unlocking handle 502, the extension portion 501 can push the second connecting plate 53 to rotate during the rotation process. Since the adjustment rod 42 and the second connecting plate 53 are jointly hinged in the moving seat 55, as the second connecting plate 53 moves, it will drive the moving seat 55 to move downward along the guide rail 54 until the second connecting plate 53 and the extension portion 501 are collinear to form a second dead point 530 (i.e. Figure 4 The movable seat 55 is fixed at the second dead point 530, thereby locking the entire telescopic mechanism 4, ensuring that the positions of the adjustment rod 42 and the rotation rod 41 will not change. When the clamp needs to be released, the operator can release the locking state of the first dead point 520 and the second dead point 530 by pulling the unlocking handle 502 (i.e., the unlocking handle 502 is moved along the Figure 4 In the process of unlocking, the movable seat 55 can move upward along the guide rail 54, so that the second connecting plate 53 returns to the initial position, which is convenient for the profiling block 31 to readjust or unload the workpiece 1. It can be seen that the cooperation of the guide rail 54 and the movable seat 55 can not only provide sufficient displacement space for the adjustment rod 42 and the rotating rod 41 to adapt to the position of the adjustment mechanism 3 and the slide mechanism 6, but also provide an additional mechanical locking mechanism by using the formed second dead point 530 to ensure that there will be no accidental loosening or displacement during the processing, thereby improving the stability of the clamp.

[0060] The position - adjusting mechanism 3 further includes: a support block 32. One end of the support block 32 is movably arranged in the slide - table mechanism 6, and a spherical groove 320 is formed at the other end. The spherical bowl 30 is movably connected in the spherical groove 320; a fixing rod 33, which is arranged in the support block 32. A locking block 330 is formed at one end of the fixing rod 33. The locking block 330 is movably pressed against the inner wall of the spherical bowl 30 to limit the rotation of the spherical bowl 30 in the spherical groove 320; the other end of the fixing rod 33 is movably connected to the sliding seat 40.

[0061] As Figures 2 to 5 shown, when machining areas A / B / C at different height positions of the thin - walled workpiece 1 are required, the clamping position of the profiling block 31 relative to the thin - walled workpiece 1 needs to be adjusted accordingly. Specifically, the support block 32 rotates clockwise or counterclockwise relative to the slide - table mechanism 6 around its right - hand end in Figure 5 , thereby driving the fixing rod 33 inside the support block 32 to rotate synchronously. Finally, the spherical bowl 30 at the left - hand end of the support block 32 shown in Figure 5 is lifted or lowered to the corresponding area to be clamped (any one of areas A / B / C). At this time, the spherical bowl 30 can freely rotate in the spherical groove 320, so as to adjust the profiling block 31 to a suitable position, thereby ensuring the stability when the profiling block 31 accurately clamps the thin - walled workpiece 1.

[0062] It should be noted that during the above - mentioned operation process, the locking block 330 is completely inside the spherical bowl 30 (i.e., non - contact with the inner wall of the spherical bowl 30). When the profiling block 31 accurately adheres to the specified clamping area of the workpiece 1, as the unlocking handle 502 is pressed down to the Figure 4 shown posture, the second dead - point 530 formed can be used to tighten the sliding seat 40. As shown in Figure 5 , during the tightening process of the sliding seat 40, it means that the sliding seat 40 can drive the locking block 330 to move into the support block 32 through the fixing rod 33 (i.e., Figure 5 moving from left to right), thereby enabling the locking block 330 (the radian of the outer wall of the locking block 330 is consistent with the radian of the inner wall of the spherical bowl 30) to be movably pressed against the annular inner wall of the spherical bowl 30, ultimately achieving the purpose of restricting the relative rotational movement of the spherical bowl 30 in the spherical groove 320. And this precisely ensures the stability of the profiling block 31 connected to the spherical bowl 30 during the clamping process of the thin - walled workpiece 1. Thus, it can be seen that through the design of the spherical bowl 30 and the spherical groove 320 in this embodiment, multi - direction and multi - angle fine adjustment can be realized, ensuring that the profiling block 31 can closely fit various irregular shapes on the surface of the workpiece 1, improving the adaptability and precision of the fixture; and the design of the locking block 330 effectively restricts the rotation of the spherical bowl 30 in the spherical groove 320, avoiding the problem of inaccurate positioning caused by excessive rotation. This design ensures the stability of the position of the spherical bowl 30 during the machining process and improves the reliability of the entire fixture.

[0063] Preferably, as Figure 6 shown, in this embodiment, two semi-limiting rings 34 are detachably connected to the end of the support block 32 close to the placement table 20. As the ball bowl 30 is pre-assembled into the spherical groove 320, the semi-limiting rings 34 can be detachably connected to the support block 32 by bolts or other fixing means, ensuring convenient disassembly and assembly when adjustment or maintenance is required, reducing the adjustment time and improving work efficiency; when the two semi-limiting rings 34 are tightly abutted against each other, they jointly form a complete ring structure and surround the ball bowl 30. It should be noted that the diameter of the ring structure formed by the two semi-limiting rings 34 in this embodiment is slightly smaller than the maximum diameter of the ball bowl 30, so that while not affecting the ball bowl 30 to drive the profiling block 31 for angle adjustment, it can effectively prevent the ball bowl 30 from accidentally disengaging from the spherical groove 320 due to vibration or impact during the processing, improving the safety and reliability of the fixture.

[0064] The locking mechanism 5 further includes: a support plate 56 disposed on the placement table 20, one end of the first connecting plate 52 is movably hinged to the support plate 56, and the other end is hinged to the common connection of the driving part 500, the extending part 501 and the unlocking handle 502, so as to form a first dead point 520 when the driving part 500 and the first connecting plate 52 are collinear; a rotating block 57, one end of which is hinged to the support plate 56 and the other end is hinged to the driving part 500, and a U-shaped extension rod is vertically connected to the rotating block 57; an upper cover plate 58, which is connected to the bottom of the pressing block 51, and an extension column 510 is formed on the pressing block 51. The extension column 510 passes through the U-shaped extension rod and is locked and fixed by a connecting member, so that when the rotating block 57 rotates, it can drive the pressing block 51 to rotate synchronously through the U-shaped extension rod to press the upper cover plate 58 against the sliding table mechanism 6, restricting the relative displacement of the support block 32 with respect to the substrate 2.

[0065] Preferably, in addition to the above structure, the locking mechanism 5 in this embodiment further includes a support plate 56, a rotating block 57 and an upper cover plate 58. Specifically, as Figure 3 shown, when the unlocking handle 502 is rotated clockwise to Figure 3 the state shown (i.e., during the unlocking process, the unlocking handle 502 is along Figure 3The upper cover plate 58 can be driven away from the slide mechanism 6 by rotating in the counterclockwise direction, and the rotating block 57 can rotate toward the slide mechanism 6 around the connection between it and the support plate 56. Since the U-shaped extension rod is perpendicular to the rotating block 57, the U-shaped extension rod can transmit the movement of the rotating block 57 to the clamping block 51, thereby enabling the clamping block 51 to drive the upper cover plate 58 to flexibly clamp the right end of the support block 32 and stably adhere to the slide mechanism 6. That is to say, in the process of clamping the workpiece 1, the driving arm 50 applies an external force through the driving part 500 to make the first connecting plate 52 and the rotating block 57 move at the same time, and the first connecting plate 52 drives the driving part 500 and the first dead point 520 to lock, and the rotating block 57 drives the clamping block 51 to move downward through the U-shaped extension rod, and presses the upper cover plate 58 against the slide mechanism 6 to achieve full locking; when the clamp needs to be released, the operator pulls the unlocking handle 502 to release the locking state of the first dead point 520 and the second dead point 530 (that is, the unlocking handle 502 moves along the Figure 3 The first dead point 520 and the second dead point 530 are double locked, which ensures that the entire fixture will not accidentally loosen or move during processing, thereby greatly improving the stability and reliability of the workpiece 1 during clamping processing.

[0066] Preferably, in this embodiment, the connection between the U-shaped extension rod and the pressing block 51 is mainly through the extension column 510 formed on the pressing block 51, which penetrates the U-shaped extension rod and is locked and fixed by a connecting member (such as a bolt), so that when the rotating block 57 rotates, it can drive the pressing block 51 to rotate synchronously through the U-shaped extension rod. In this process, this structure effectively avoids the misalignment phenomenon caused by any slip between the two when the upper cover plate 58 presses the slide mechanism 6, thereby ensuring the stability of the clamp during operation. It should be noted that the extension column 510 in this embodiment can be provided with an external thread (not shown in the figure). After the extension column 510 passes through the U-shaped extension rod, the extension column 510 can be threadedly connected by a locking nut (not shown in the figure) to further ensure the stability of the connection between the U-shaped extension rod and the pressing block 51. Preferably, for the connection and fixation between the rotating rod 41 and the adjusting rod 42 in the above-mentioned telescopic mechanism 4, this method can also be used on the connecting column 420 to achieve it. Its working principle is the same as above, and it will not be repeated in detail here.

[0067] A guide column 580 and an elastic member 581 are also provided in the upper cover plate 58. The elastic member 581 is sleeved on the guide column 580. A guide groove 612 is opened in the slide mechanism 6. The elastic member 581 can be inserted into the guide groove 612 synchronously with the guide column 580, so that the upper cover plate 58 can be moved closely to the slide mechanism 6.

[0068] Further preferably, as Figure 3 shown, during the process of the unlocking handle 502 rotating to the Figure 3 state shown, the upper cover plate 58 gradually approaches the sliding table mechanism 6 by relying on the rotational movement of the rotating block 57. During the downward movement, the guide post 580 enters the guide groove 612 of the sliding table mechanism 6, and at the same time, the elastic member 581 starts to be compressed. As the guide post 580 gradually penetrates into the guide groove 612, the elastic member 581 is further compressed, providing a continuous reaction force, so that the upper cover plate 58 always maintains a state of being closely attached to the sliding table mechanism 6. When the upper cover plate 58 completely presses the sliding table mechanism 6, the guide post 580 is completely inserted into the guide groove 612. The design of the guide post 580 and the guide groove 612 ensures that the upper cover plate 58 can be accurately attached to the sliding table mechanism 6, avoiding the problem of inaccurate pressing caused by deviation. At this time, the elastic member 581 is in the maximum compression state, generating sufficient reaction force to maintain a stable pressing force. The design of the elastic member 581 provides a buffering function, which can absorb shocks and vibrations during the pressing process, preventing damage to the workpiece 1 and the equipment. Moreover, the elastic member 581 can also provide an additional pressing force to ensure that the upper cover plate 58 always closely adheres to the sliding table mechanism 6. At this time, the first dead point 520 and the second dead point 530 are both formed, and the entire fixture is locked to ensure the stable clamping of the side wall of the thin-walled workpiece 1 by the profiling block 31.

[0069] Further preferably, in this embodiment, a relief groove 560 is also provided at the top end of the support plate 56. The relief groove 560 can provide sufficient space for the rotation of the driving part 500, the extension part 501, the unlocking handle 502, and the first connecting plate 52, effectively avoiding the phenomenon of jamming or even collision damage caused by position interference between the components during the switching process between the unlocking and locking states of the fixture. In addition, in this embodiment, a support rod 561 is also provided on the side of the support plate 56 facing the outside of the substrate 2. As Figure 2 shown, during the process of a user operating the unlocking handle 502 with one hand to perform a rotational movement to achieve unlocking or locking, the other hand can hold the support rod 561 tightly, so as to facilitate the user to complete the overall operation steps, that is, under the effective support force, it provides great convenience for the operator during use.

[0070] The sliding table mechanism 6 includes: a slider 60, slide rails 21 are installed on the substrate 2 and distributed on both sides of the placement table 20, and the slider 60 is movably clamped to the slide rails 21; a lower cover plate 61, which is arranged on the slider 60, a profiling groove 610 is formed inside the lower cover plate 61, and a rotating shaft 321 is formed at the end of the support block 32, and the rotating shaft 321 is movably installed in the profiling groove 610.

[0071] As Figures 2 to 5As shown, when the angle of the support block 32 needs to be adjusted, the slider 60 moves horizontally along the slide rail 21, thereby adjusting the positions of the support block 32 and the profiling block 31 to adapt to different clamping areas ( Figure 1 Area A / Area B / Area C in the figure shown), which also enables the sliding table mechanism 6 to flexibly adapt to various non-flat and complex-shaped workpieces 1, enhancing the versatility and application range of the fixture; the design of the profiling groove 610 allows the support block 32 to rotate freely within a certain range, performing the functions of limiting and guiding, which helps to improve the accuracy when the support block 32 adjusts the position of the profiling block 31. And as the upper cover plate 58 (also having a profiling groove 610 with the same structure, not shown in the figure) is attached to the lower cover plate 61, the support block 32 can be effectively restricted from displacement or rotation by relying on the first dead point 520.

[0072] A limiting groove 611 is provided in the lower cover plate 61. The sliding seat 40 includes a clamping block 400 and a connecting arm 401. The rotating rod 41 is connected to the clamping block 400, and the clamping block 400 is movably clamped in the limiting groove 611; the connecting arm 401 is disposed on one side of the clamping block 400. An arc-shaped avoidance groove 321a is formed in the rotating shaft 321 in its radial direction. The connecting arm 401 extends into the arc-shaped avoidance groove 321a and is movably connected to the fixed rod 33.

[0073] Preferably, as Figure 3 and Figure 7 shown, after the unlocking handle 502 rotates and reaches Figure 3When the fixture is in the clamped state as shown, during the rotation of the extension part 501, the second connecting plate 53 is driven to move vertically along the guide rail 54 through the moving seat 55. At the same time, by means of the rotating rod 41 and the adjusting rod 42, the engaging block 400 is movably clamped on the side wall of the limiting groove 611 away from the placing table 20. Along with the formation of the second dead point 530 (the extension part 501 and the second connecting plate 53 are collinear), and then, while restricting the displacement of the moving seat 55, the engaging block 400 is locked in the limiting groove 611. Finally, in this way, the tensile force on the lower cover plate 61, the slider 60 and the locking block 330 at the distal end of the fixed rod 33 is realized. It can be seen that complex adjustment, clamping and locking functions are realized through a simple mechanical mechanism, reducing the operation steps, lowering the operation difficulty and improving the work efficiency. Further preferably, in this embodiment, the design of the connecting arm 401 in the arc-shaped avoidance groove 321a not only provides a flexible angle adjustment function, but also can absorb impact and vibration to a certain extent, preventing damage to the workpiece 1 and the fixture. Similarly, since the guide groove 612 in this embodiment is arranged in the lower cover plate 61, when the pressing block 51 drives the upper cover plate 58 to movably press on the lower cover plate 61, along with the formation of the first dead point 520, the flipping action of the support block 32 can be effectively restricted, which also guarantees the stability of the positions of the ball bowl 30 and the profiling block 31 at the end of the support block 32.

[0074] It should be noted that in this embodiment, the so-called movable connection and movable hinge can both realize the assembly between two components through a connecting pin. In addition, the elastic member 581 in this embodiment can be replaced by other elastic devices such as a compression spring and a return spring.

[0075] It should be noted that in the present invention, descriptions such as "first", "second", and "one" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined. Terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0076] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0077] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A flexible clamp for thin-walled parts, used to clamp non-flat workpieces to be processed, characterized in that: It includes a base plate, a placing table, and a sliding mechanism, a positioning mechanism, a telescopic mechanism and a locking mechanism which are symmetrically distributed on both sides of the placing table; The placing table is arranged on the substrate, and the workpiece to be processed is fixed on the placing table in a vertical posture; The positioning mechanism is movably arranged on the slide mechanism, and a ball bowl and a profiling block are arranged on the positioning mechanism. The profiling block is connected to the ball bowl and can be movably pressed against the side wall of the workpiece when the ball bowl adjusts the relative position between the ball bowl and the positioning mechanism; the slide mechanism is movably arranged on the base plate, and is used to drive the positioning mechanism to approach or move away from the placing platform, so that the profiling block can be movably pressed against different height positions of the side wall of the workpiece; The telescopic mechanism is movably connected to the positioning mechanism to adapt the distance between the sliding platform mechanism and the placing platform; The locking mechanism comprises a driving arm and a pressing block, a first connecting plate is movably arranged between the driving arm and the locking mechanism, a second connecting plate is movably arranged between the driving arm and the telescopic mechanism, and a connection between the second connecting plate and the telescopic mechanism is movably arranged on the locking mechanism; when the driving arm drives the pressing block to movably press the slide mechanism, the first connecting plate can form a first dead point with the driving arm, and at the same time, the second connecting plate and the driving arm are linked to form a second dead point; When the driving arm drives the clamping block to move and clamp the positioning mechanism, the first dead point is used to limit the displacement of the positioning mechanism relative to the substrate, and links the second dead point to lock the slide mechanism and the ball bowl so that the contour block can clamp the workpiece.

2. A flexible clamp for thin-walled parts according to claim 1, characterized in that: The driving arm comprises a driving portion, an extending portion and an unlocking handle which are arranged at an angle to each other, and a common connection point between the driving portion, the extending portion and the unlocking handle is movably hinged to the first connecting plate.

3. A flexible clamp for thin-walled parts according to claim 2, characterized in that: The telescopic mechanism comprises: A sliding seat, which is movably arranged in the slide mechanism, and the sliding seat is movably connected to the positioning mechanism; A rotating rod and an adjusting rod, one end of the rotating rod is movably hinged to the sliding seat, and the other end is formed with an adjusting hole; one end of the adjusting rod forms a connecting column and a scale indicator block on both side walls respectively, the connecting column can pass through the adjusting hole and be connected by a fastener, and the scale indicator block is used to display the overall length of the adjusting rod and the rotating rod; the other end of the adjusting rod and the second connecting plate move together in the locking mechanism.

4. A flexible clamp for thin-walled parts according to claim 3, characterized in that: A guide rail is provided on the locking mechanism in the vertical direction, and a movable seat is movably connected to the guide rail. One end of the second connecting plate is movably hinged to the extension portion, and the other end of the second connecting plate and the end of the adjusting rod away from the rotating rod are hinged to the movable seat together, so that the second dead point is formed when the second connecting plate and the extension portion are in the same line.

5. The flexible clamp for thin-walled parts according to claim 3, characterized in that: The positioning mechanism also includes: A support block, one end of which is movably arranged in the slide mechanism, and the other end of which is formed with a spherical groove, and the ball bowl is movably connected in the spherical groove; A fixing rod is arranged in the supporting block, one end of which is formed with a locking block, which is movably attached to the inner wall of the ball bowl to limit the rotation of the ball bowl in the spherical groove; the other end of the fixing rod is movably connected to the sliding seat.

6. A flexible clamp for thin-walled parts according to claim 5, characterized in that: The end of the support block close to the placing table can be detachably connected with two semi-limiting rings, and the semi-limiting rings can limit the ball bowl from being separated from the spherical groove when they are pressed against each other.

7. A flexible clamp for thin-walled parts according to claim 2, characterized in that: The locking mechanism also includes: A support plate is arranged on the placing table, one end of the first connecting plate is movably hinged to the support plate, and the other end is hinged to a common connection point of the driving part, the extending part and the unlocking handle, so that the first dead point is formed when the driving part and the first connecting plate are in a collinear line; A rotating block, one end of which is hinged to the support plate, and the other end of which is hinged to the driving part, and a U-shaped extension rod is vertically connected to the rotating block; An upper cover plate is connected to the bottom of the clamping block, and an extension column is formed on the clamping block. The extension column passes through the U-shaped extension rod and is locked and fixed by a connecting piece, so that when the rotating block rotates, the clamping block can be driven to rotate synchronously through the U-shaped extension rod to press the upper cover plate against the slide mechanism, thereby limiting the displacement of the support block relative to the base plate.

8. A flexible clamp for thin-walled parts according to claim 7, characterized in that: A guide column and an elastic member are also provided in the upper cover plate. The elastic member is sleeved on the guide column. A guide groove is provided in the slide mechanism. The elastic member can be inserted into the guide groove synchronously with the guide column, so that the upper cover plate can be movably attached to the slide mechanism.

9. The flexible clamp for thin-walled parts according to claim 5, characterized in that: The slide mechanism comprises: A slider, wherein the base plate is provided with slide rails distributed on both sides of the placing platform, and the slider is movably connected to the slide rails; The lower cover plate is arranged on the sliding block, a contour groove is formed in the lower cover plate, a rotating shaft is formed at the end of the supporting block, and the rotating shaft is movably mounted in the contour groove.

10. A flexible clamp for thin-walled parts according to claim 9, characterized in that: A limiting groove is provided in the lower cover plate, the sliding seat includes a locking block and a connecting arm, the rotating rod is connected to the locking block, and the locking block is movably locked in the limiting groove; the connecting arm is provided on one side of the locking block, the rotating shaft is provided with an arc-shaped avoidance groove along its radial direction, the connecting arm extends into the arc-shaped avoidance groove, and is movably connected to the fixing rod.

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