Adjustable flexible clamp for processing special-shaped metal workpieces

Abstract

The utility model relates to flexible clamp technical field especially relates to a adjustable flexible clamp for special-shaped metal workpiece processing, including work table, be provided with height adjusting mechanism on the work table, be provided with interval adjusting mechanism on height adjusting mechanism, the utility model has the advantages of: through setting height adjusting mechanism, by cylinder drive, through gear and toothed plate transmission, the pressure is dispersed on the interval adjusting mechanism of both sides, the slide bar follows toothed plate and presses down, and through the upper flexible clamp can adapt to the problem of the position height difference of the workpiece being pressed, thereby the height difference of the special-shaped workpiece surface can adapt, through the surface sliding of the slide sleeve on the slide bar, can adjust the interval between two upper flexible clamps, thereby the length of workpiece is adapted, ensures that the positioning element can cover, ensures that the positioning is effective, realized the two -dimensional adjustment of height and interval, adapts the height difference and length change of special-shaped workpiece.

Description

Technical Field

[0001] This utility model relates to the field of flexible fixture technology, and in particular to an adjustable flexible fixture for machining irregularly shaped metal workpieces. Background Technology

[0002] Flexible fixtures are clamping devices that can adapt to different workpiece shapes and sizes. Through modular design (such as pin matrix and sliding column structure), flexible fixtures can quickly adjust the clamping form to adapt to the clamping of irregular workpieces. Flexible fixtures have become the core equipment for processing irregular metal workpieces.

[0003] In aerospace, automotive manufacturing and other fields, irregularly shaped metal workpieces (such as aero-engine blades and automotive drive shafts) have a wide range of lengths (e.g., 200mm-1500mm), while the design range of traditional flexible fixtures is usually fixed (e.g., 300-500mm). When the length of the workpiece exceeds the design range, the coverage of the positioning elements is insufficient, which will lead to local positioning failure. For irregularly shaped workpieces (such as L-shaped and T-shaped structures) with large surface height differences, the fixed height of the positioning module of traditional fixtures will cause some positioning points to fail to contact the workpiece, thus resulting in positioning failure. Utility Model Content

[0004] To overcome the problem that the design range of existing traditional flexible fixtures is usually fixed, when the length of the workpiece exceeds the design range, the coverage of the positioning element is insufficient, which will lead to local positioning failure. For irregular workpieces with large surface height differences, the fixed height of the positioning module of the traditional fixture will cause some positioning points to fail to contact the workpiece, thus resulting in positioning failure.

[0005] The technical solution of this utility model is: an adjustable flexible fixture for processing irregularly shaped metal workpieces, including a worktable, a height adjustment mechanism on the worktable, and a spacing adjustment mechanism on the height adjustment mechanism; The height adjustment mechanism includes a cylinder, a connecting frame fixedly connected to the output end of the cylinder, a gear movably connected to the connecting frame via a shaft pin, and toothed plates meshing with both sides of the gear. The spacing adjustment mechanism includes a slide rod, a slide sleeve slidably connected to the slide rod, and an upper flexible clamp fixedly connected to the bottom of the slide sleeve. The slide rod is fixedly connected to the toothed plate.

[0006] Preferably, the connecting frame, gears, and toothed plates are driven downward by a cylinder to distribute the pressure on the spacing adjustment mechanism on both sides. The slide bar follows the toothed plate downward, thus solving the problem of different heights of the pressed workpieces and adapting to the height difference of the surface of irregular workpieces. By adjusting the position of the sliding sleeves on the slide bar on both sides, the spacing between the two upper flexible clamps can be adjusted to adapt to the length of the workpiece, ensuring that the positioning element can be covered and that the positioning is effective. This achieves dual-dimensional adjustment of height and spacing, adapting to the height difference and length changes of irregular workpieces.

[0007] Preferably, the top of the workbench is bolted to both sides of a side plate, and the top of the side plate is bolted to a top plate. The cylinder is fixedly connected to the top plate and its output end passes through the top plate.

[0008] Preferably, both sides of the bottom of the top plate are fixedly connected to limit plates, and a limit groove is formed on the side of the limit plate near the toothed plate. A limit slider is slidably connected to the inner cavity of the limit groove, and the limit slider is fixedly connected to the toothed plate.

[0009] Preferably, a base plate is fixedly connected to the top of the workbench, and lower flexible clamps are provided on both sides of the surface of the base plate. Threaded connection holes are opened on the surface of the base plate, and the lower flexible clamps are fixed to the threaded connection holes by bolts.

[0010] Preferably, the sliding sleeve has a threaded rod threaded onto its surface, the threaded rod extending into the inner cavity of the sliding sleeve, a positioning piece being movably connected to the bottom of the threaded rod via a bearing, and a handle being fixedly connected to the top of the threaded rod.

[0011] Preferably, positioning grooves are provided on both sides of the top of the slide rod, and positioning strips are fixedly connected to both sides of the top of the inner cavity of the slide sleeve, with the positioning strips slidably connected to the inner cavity of the positioning grooves.

[0012] Preferably, the top of the slide bar is provided with a groove for the operation of the threaded rod.

[0013] The beneficial effects of this utility model are as follows: By setting a height adjustment mechanism driven by a cylinder and transmitted through gears and toothed plates, the pressure is distributed on the spacing adjustment mechanism on both sides. The slide bar follows the toothed plate downward, and the upper flexible clamp can adapt to the problem of different heights of the pressed workpiece, thus adapting to the height difference of the surface of the irregular workpiece. By sliding the sliding sleeve on the surface of the slide bar, the spacing between the two upper flexible clamps can be adjusted to adapt to the length of the workpiece, ensuring that the positioning element can be covered and ensuring effective positioning. It realizes dual-dimensional adjustment of height and spacing, adapting to the height difference and length change of the irregular workpiece. Attached Figure Description

[0014] Figure 1The diagram shown is a front view of the present invention. Figure 2 The diagram shown is a schematic representation of the height adjustment mechanism of this utility model. Figure 3 The diagram shown is a schematic representation of the spacing adjustment mechanism of this utility model. Figure 4 The diagram shown is a cross-sectional view of the sliding sleeve of this utility model. Figure 5 This utility model is shown. Figure 3 A magnified schematic diagram of the partial structure at point B in the middle; Figure 6 The diagram shown is a schematic representation of the substrate structure of this utility model. Figure 7 This utility model is shown. Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0015] Explanation of reference numerals in the attached figures: 1. Workbench; 2. Height adjustment mechanism; 201. Cylinder; 202. Connecting frame; 203. Gear; 204. Tooth plate; 205. Limiting slider; 3. Spacing adjustment mechanism; 301. Slide rod; 302. Slide sleeve; 303. Upper flexible clamp; 304. Threaded rod; 305. Positioning piece; 306. Tightening handle; 307. Positioning strip; 308. Positioning groove; 4. Side plate; 5. Top plate; 6. Limiting plate; 7. Limiting slide groove; 8. Base plate; 9. Lower flexible clamp; 10. Threaded connection hole. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Example 1 Please see Figures 1-3 This utility model provides an embodiment: an adjustable flexible fixture for processing irregularly shaped metal workpieces, including a worktable 1, a height adjustment mechanism 2 provided on the worktable 1, and a spacing adjustment mechanism 3 provided on the height adjustment mechanism 2; The height adjustment mechanism 2 includes a cylinder 201, a connecting frame 202 fixedly connected to the output end of the cylinder 201, a gear 203 movably connected to the connecting frame 202 via a shaft pin, and toothed plates 204 meshing with both sides of the gear 203. The spacing adjustment mechanism 3 includes a slide rod 301, a slide sleeve 302 slidably connected to the slide rod 301, and an upper flexible clamp 303 fixedly connected to the bottom of the slide sleeve 302. The slide rod 301 is fixedly connected to the toothed plate 204.

[0018] During operation, the cylinder 201 drives the connecting frame 202, gear 203, and toothed plate 204 to move downwards. The toothed plate 204 drives the spacing adjustment mechanism 3 to move downwards as well. When the upper flexible clamps 303 on both sides are not in contact with the workpiece, the gear 203 is stationary due to the downward drive of the cylinder 201 and the equal-volume spacing adjustment mechanism 3 on both sides. Therefore, the upper flexible clamps 303 on both sides always remain horizontal. When one upper flexible clamp 303 contacts the workpiece first, the toothed plate 204 on that side stops moving. For example, if the workpiece is lower on the left and higher on the right, the upper flexible clamp 303 on the right side will contact it first and press it down. As cylinder 201 drives gear 203 downward, the right toothed plate 204 is in position first. Then, gear 203 will rotate counterclockwise, which will drive the left toothed plate 204 to continue downward until the upper flexible clamp 303 presses against the left side of the workpiece. This solves the problem of different heights of the pressed workpiece and can adapt to the height difference of the surface of the irregular workpiece. By adjusting the position of the two sliding sleeves 302 on the sliding rod 301, the distance between the two upper flexible clamps 303 can be adjusted to adapt to the length of the workpiece, ensuring that the positioning element can be covered and that the positioning is effective. This achieves dual-dimensional adjustment of height and distance, adapting to the height difference and length change of the irregular workpiece.

[0019] Example 2 Please see Figure 1 and Figure 7 The difference from Embodiment 1 is that both sides of the top of the workbench 1 are bolted to side plates 4, and the top of the side plates 4 is bolted to a top plate 5. The cylinder 201 is fixedly connected to the top plate 5 and its output end passes through the top plate 5.

[0020] Limiting plates 6 are fixedly connected to both sides of the bottom of the top plate 5. A limiting groove 7 is opened on the side of the limiting plate 6 near the toothed plate 204. A limiting slider 205 is slidably connected to the inner cavity of the limiting groove 7. The limiting slider 205 is fixedly connected to the toothed plate 204.

[0021] By setting the side plate 4 and the top plate 5, the height adjustment mechanism 2 is stably supported. By setting the limiting plate 6, the limiting groove 7 and the limiting slider 205, the toothed plate 204 is limited, ensuring that the movement trajectory of the toothed plate 204 remains stable.

[0022] Example 3 Please see Figure 1 and Figure 6 The difference from Embodiment 1 is that a base plate 8 is fixedly connected to the top of the workbench 1, and a lower flexible clamp 9 is provided on both sides of the surface of the base plate 8. A threaded connection hole 10 is opened on the surface of the base plate 8, and the lower flexible clamp 9 and the threaded connection hole 10 are fixed together by bolts.

[0023] The lower flexible clamp 9 provided on the substrate 8 can cooperate with the upper flexible clamp 303 to clamp the workpiece vertically. The upper flexible clamp 303 and the lower flexible clamp 9 cooperate to form a clamping force of "upper pressure and lower support", which can adapt to the irregular surface of the irregular workpiece. Therefore, the required position of the lower flexible clamp 9 can be adjusted by the threaded connection hole 10, and the position can be fixed by the bolts on both sides of the lower flexible clamp 9 and the threaded connection hole 10.

[0024] Example 4 Please see Figures 4-5 The difference from Embodiment 2 is that the surface of the sliding sleeve 302 is threadedly connected to a threaded rod 304, the threaded rod 304 extends into the inner cavity of the sliding sleeve 302, the bottom of the threaded rod 304 is movably connected to a positioning piece 305 through a bearing, and the top of the threaded rod 304 is fixedly connected to a handle 306.

[0025] The top of the slide rod 301 has positioning grooves 308 on both sides, and the top of the inner cavity of the slide sleeve 302 has positioning strips 307 fixedly connected on both sides. The positioning strips 307 are slidably connected to the inner cavity of the positioning grooves 308.

[0026] The top of the slide bar 301 is provided with a groove for the threaded rod 304 to run.

[0027] The distance between the two upper flexible clamps 303 is adjusted by sliding the sliding sleeve 302 on the sliding rod 301. When the screw handle 306 is rotated, the threaded rod 304 on the surface of the sliding sleeve 302 moves towards the bottom of the inner cavity of the sliding sleeve 302 until the positioning piece 305 is in close contact with the bottom of the inner cavity of the groove for the threaded rod 304 to move, thereby fixing the position of the sliding sleeve 302. The positioning piece 305 is made of rubber to increase friction and prevent loosening. The positioning strip 307 slides in the inner cavity of the positioning groove 308, which can limit the movement trajectory of the sliding sleeve 302.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An adjustable flexible fixture for machining irregularly shaped metal workpieces, comprising a worktable (1), characterized in that: The workbench (1) is provided with a height adjustment mechanism (2), and the height adjustment mechanism (2) is provided with a spacing adjustment mechanism (3). The height adjustment mechanism (2) includes a cylinder (201), a connecting frame (202) fixedly connected to the output end of the cylinder (201), a gear (203) movably connected to the connecting frame (202) via a shaft pin, and toothed plates (204) meshing with the gear (203) on both sides. The spacing adjustment mechanism (3) includes a slide rod (301), a slide sleeve (302) slidably connected to the slide rod (301), and an upper flexible clamp (303) fixedly connected to the bottom of the slide sleeve (302). The slide rod (301) is fixedly connected to the toothed plate (204).

2. The adjustable flexible fixture for machining irregularly shaped metal workpieces according to claim 1, characterized in that: The workbench (1) has side plates (4) bolted to both sides of its top, and a top plate (5) bolted to the top of the side plates (4). The cylinder (201) is fixedly connected to the top plate (5) and its output end passes through the top plate (5).

3. The adjustable flexible fixture for machining irregularly shaped metal workpieces according to claim 2, characterized in that: Limiting plates (6) are fixedly connected to both sides of the bottom of the top plate (5). A limiting groove (7) is opened on the side of the limiting plate (6) near the toothed plate (204). A limiting slider (205) is slidably connected to the inner cavity of the limiting groove (7). The limiting slider (205) is fixedly connected to the toothed plate (204).

4. An adjustable flexible fixture for machining irregularly shaped metal workpieces according to claim 3, characterized in that: The top of the workbench (1) is fixedly connected to a base plate (8). Both sides of the surface of the base plate (8) are provided with lower flexible clamps (9). The surface of the base plate (8) is provided with threaded connection holes (10). The lower flexible clamps (9) and the threaded connection holes (10) are fixed together by bolts.

5. An adjustable flexible fixture for machining irregularly shaped metal workpieces according to claim 1, characterized in that: The sliding sleeve (302) is threadedly connected to a threaded rod (304), which extends into the inner cavity of the sliding sleeve (302). The bottom of the threaded rod (304) is movably connected to a positioning piece (305) via a bearing, and the top of the threaded rod (304) is fixedly connected to a handle (306).

6. The adjustable flexible fixture for machining irregularly shaped metal workpieces according to claim 1, characterized in that: The top of the slide rod (301) is provided with positioning grooves (308) on both sides, and the top of the inner cavity of the slide sleeve (302) is fixedly connected with positioning strips (307), and the positioning strips (307) are slidably connected to the inner cavity of the positioning grooves (308).

7. An adjustable flexible fixture for machining irregularly shaped metal workpieces according to claim 1, characterized in that: The top of the slide bar (301) is provided with a groove for the threaded rod (304) to run.

Images