An adaptive clamping structure of thin-walled frame-shaped parts

Abstract

The utility model discloses a kind of clamping structures of self-adapting thin-wall frame-shaped parts, including clamping outer frame, the inner partition of clamping outer frame is provided with, clamping outer frame is provided with negative pressure cavity and operating cavity in, multiple negative pressure suction holes are set in the clamping outer frame, mobile push rod is movably installed on negative pressure suction hole, one end of mobile push rod is connected with adjusting rod, the one side of the inner partition is provided with extrusion operation stretching assembly, the clamping structure of self-adapting thin-wall frame-shaped part, part is placed in the one side of clamping outer frame and presses, mobile push rod moves after being extruded, adjusting rod will be driven to move, the extrusion operation stretching assembly of setting, arc extrusion block can be driven to move, adjusting rod after being extruded will continue to move under the pushing effect of arc extrusion block, mobile push rod will be inserted into negative pressure cavity, corresponding negative pressure suction hole will be in the state of opening at this time, negative pressure suction hole opens and closes, can be adjusted according to the size of part, self-adapting.

Description

Technical Field

[0001] This utility model relates to the field of parts clamping technology, and in particular to a clamping structure for an adaptive thin-walled frame-shaped part. Background Technology

[0002] Machining thin-walled parts is a challenging task in the machining field. With the increasing market demand for small-batch, high-variety thin-walled parts, the cost of fixtures and machining will inevitably rise. To meet the needs of flexible thin-walled part machining, especially addressing the clamping design problem, this patent focuses on the machining of thin-walled frame parts. To reduce weight, most aerospace parts are designed with thin walls and a certain number of weight-reduction windows. These types of aerospace parts are commonly referred to as aerospace thin-walled parts. During the machining of thin-walled frame parts, due to their special shape and low rigidity, the primary technical challenge is clamping them. Thin-walled frame parts are characterized by light weight, thin thickness, low rigidity, and easy deformation. Especially for aerospace thin-walled frame parts, the high precision, small size, and special material requirements make clamping and fixing during machining particularly difficult. Therefore, an adaptive clamping structure for thin-walled frame parts is proposed. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides an adaptive clamping structure for thin-walled frame parts, thereby solving the aforementioned problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An adaptive clamping structure for thin-walled frame parts includes a clamping outer frame, an inner partition plate inside the clamping outer frame, a negative pressure chamber and an operating chamber inside the clamping outer frame, multiple negative pressure suction holes on the clamping outer frame, movable push rods movably mounted on the negative pressure suction holes, one end of the movable push rods being connected to an adjusting rod, a compression operation and stretching assembly on one side of the inner partition plate being adapted to the adjusting rod, and a contact sealing assembly on one side of the clamping outer frame.

[0006] Preferably, a compression spring is fixedly installed between the side of the movable push rod and the side of the inner partition, and the compression spring is sleeved on the adjusting rod.

[0007] Preferably, the extrusion stretching assembly includes a telescopic cylinder fixedly installed on the side of the inner partition, and the output end of the telescopic cylinder is connected to a push plate.

[0008] Preferably, a plurality of driving rods are fixedly installed on one side of the push plate, a plurality of connecting blocks are fixedly installed on one side of the driving rods, and an arc-shaped extrusion block is fixedly installed on one side of the plurality of connecting blocks.

[0009] Preferably, one side of the arc-shaped extrusion block is provided with an arc-shaped surface, and one side of the adjusting rod is provided with an adjusting hole. The adjusting hole is adapted to the arc-shaped surface, and the arc-shaped extrusion block is located on one side of the adjusting rod.

[0010] Preferably, an air pump is provided on one side of the clamping frame, and the air pump is connected to the negative pressure chamber.

[0011] Preferably, the contact sealing assembly includes multiple outer slots formed on the side of the clamping frame, the outer slots being square in shape, and an outer sealing ring being installed on the outer slot.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the clamping structure of the adaptive thin-walled frame part places the part on one side of the clamping frame and presses it. After the moving push rod is squeezed, it will drive the adjusting rod to move. The set extrusion operation stretching component can drive the arc extrusion block to move. After being squeezed, the adjusting rod will continue to move under the pushing action of the arc extrusion block. The moving push rod will extend into the negative pressure chamber. At this time, the corresponding negative pressure suction hole will be in the open state. The opening and closing of the negative pressure suction hole can be adaptively adjusted according to the size of the part. The vacuum pump is started and the external part can be sucked in under the action of negative pressure, thereby achieving the effect of clamping the part.

[0013] The uncompressed moving push rod is in the external state, which can limit and block the parts around it. The contact sealing component is set so that when the parts are sucked in by negative pressure, they will come into close contact with the outer sealing ring, thereby achieving a contact sealing effect and avoiding the problem that the parts are not flat and cannot be sucked in by negative pressure. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a vertical sectional view of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of this utility model in plan view;

[0017] Figure 4 This is a schematic diagram of the structure of the present invention in an explosion.

[0018] Figure 5 This is a partial three-dimensional structural diagram of the present invention.

[0019] In the diagram: 1. Clamping frame; 2. Inner partition; 3. Negative pressure chamber; 4. Operating chamber; 5. Vacuum pump; 6. Negative pressure suction hole; 7. Moving push rod; 8. Adjusting rod; 9. Compression spring; 10. Adjusting hole; 11. Telescopic cylinder; 12. Push plate; 13. Driving rod; 14. Connecting block; 15. Arc-shaped compression block; 16. Arc-shaped surface; 17. Outer groove; 18. Outer sealing ring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example: Refer to Figure 1-5 An adaptive clamping structure for thin-walled frame-shaped parts includes a clamping outer frame 1, an inner partition 2 inside the clamping outer frame 1, a negative pressure chamber 3 and an operating chamber 4 inside the clamping outer frame 1, multiple negative pressure suction holes 6 on the clamping outer frame 1, a movable push rod 7 movably mounted on the negative pressure suction hole 6, one end of the movable push rod 7 being connected to an adjusting rod 8, and a compression spring 9 fixedly mounted between the side of the movable push rod 7 and the side of the inner partition 2, the compression spring 9 being sleeved on the adjusting rod 8. When clamping thin-walled frame-shaped parts for aerospace applications, the part to be clamped is placed on one side of the clamping outer frame 1 and pressed after placement, or an external tool is used to push and press it on one side of the part. After pushing and pressing, the movable push rod 7 in contact with the part will move, and the moving push rod 7 will compress the compression spring 9 after moving. The compression spring 9 provides a small pushing force, only to move the movable push rod 7 out of the negative pressure suction hole 6. The movable push rod 7 will move after being compressed.

[0022] Furthermore, a compression operation and stretching assembly is provided on one side of the inner partition 2. The compression operation and stretching assembly is adapted to the adjusting rod 8. The compression operation and stretching assembly includes a telescopic cylinder 11 fixedly installed on the side of the inner partition 2. The output end of the telescopic cylinder 11 is connected to a push plate 12. Multiple driving rods 13 are fixedly installed on one side of the push plate 12. Multiple connecting blocks 14 are fixedly installed on one side of the driving rods 13. An arc-shaped compression block 15 is fixedly installed on one side of the multiple connecting blocks 14. An arc-shaped surface 16 is provided on one side of the arc-shaped compression block 15. An adjusting hole 10 is opened on one side of the adjusting rod 8. The adjusting hole 10 is adapted to the arc-shaped surface 16. The arc-shaped compression block 15 is located on one side of the adjusting rod 8. After the moving push rod 7 is compressed and moves, it will drive the adjusting rod 8 to move. The adjusting rod 8 will move to the operating chamber 4. Inside, the telescopic cylinder 11 on the stretching assembly is activated, which drives the push plate 12 to move, thereby driving multiple drive rods 13 to move. The movement of the drive rods 13 drives the arc-shaped extrusion block 15 to move. The adjusting rod 8, after being extruded, will move to the end position of the arc-shaped extrusion block 15. In the initial stage, under the elastic force of the extrusion spring 9, the arc-shaped extrusion block 15 and the adjusting rod 8 are in a misaligned state. The arc-shaped surface 16 on one side of the arc-shaped extrusion block 15 contacts the inner wall of the adjusting hole 10, which will drive the adjusting rod 8 to continue moving. At this time, it will drive the moving push rod 7 to continue moving. The moving push rod 7 will extend into the negative pressure chamber 3. At this time, the corresponding negative pressure suction hole 6 will be in an open state. The opening and closing of the negative pressure suction hole 6 can be adaptively adjusted according to the size of the part.

[0023] Furthermore, an air extractor 5 is provided on one side of the clamping frame 1. The air extractor 5 is connected to the negative pressure chamber 3. When the air extractor 5 is started, a strong negative pressure is generated. The operating chamber 4 is in a sealed state and is connected to the negative pressure chamber 3, so there will be no air leakage or permeation. Under the action of negative pressure, the external parts can be sucked in, thereby achieving the effect of clamping the parts. The movable push rod 7 that is not squeezed continues to be in the external state and is located around the parts, which can play a role in limiting and blocking the parts.

[0024] Furthermore, a contact sealing assembly is provided on one side of the clamping frame 1. The contact sealing assembly includes multiple outer slots 17 opened on the side of the clamping frame 1. The outer slots 17 are square in structure, and outer sealing rings 18 are installed on the outer slots 17. The outer sealing rings 18 on the contact sealing assembly extend slightly beyond the outside of the clamping frame 1. When the part is subjected to negative pressure and tightened, it will come into close contact with the outer sealing rings 18, thereby achieving the contact sealing effect. This avoids the problem that the part surface is uneven and cannot be tightened by negative pressure. Multiple sets of outer sealing rings 18 are provided, gradually extending outward, so as to achieve a good contact sealing effect.

[0025] In use: The aerospace parts achieve weight reduction through a thin-walled structure design. The part to be clamped is placed on one side of the clamping frame 1 and pressed down. The moving push rod 7, in contact with the part, will move, driving the adjusting rod 8 to move. The adjusting rod 8 will move into the operating chamber 4. Activating the telescopic cylinder 11 will move the push plate 12, thereby moving the arc-shaped extrusion block 15. After being extruded, the adjusting rod 8 will move to the end position of the arc-shaped extrusion block 15. The movement of the arc-shaped extrusion block 15 will then drive the adjusting rod 8 to continue moving, and the moving push rod 7 will extend into the negative pressure chamber 3. At this time… The corresponding negative pressure suction hole 6 will be in the open state. The opening and closing of the negative pressure suction hole 6 can be adaptively adjusted according to the size of the part. The vacuum pump 5 is started to run, generating a strong negative pressure. Under the action of negative pressure, the external parts can be sucked up, thereby achieving the effect of part clamping. After the parts are sucked up by negative pressure, they will come into close contact with the outer sealing ring 18, thereby achieving the effect of contact sealing. This avoids the problem that the negative pressure cannot be tightened due to uneven surface of the parts. There are multiple sets of outer sealing rings 18, which gradually extend outward, thereby achieving a good contact sealing effect and making it convenient to use.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamping structure for an adaptive thin-walled frame-shaped part, comprising a clamping outer frame (1), characterized in that, The clamping frame (1) is provided with an inner partition (2), a negative pressure chamber (3) and an operating chamber (4) are provided inside the clamping frame (1), a plurality of negative pressure suction holes (6) are provided on the clamping frame (1), a movable push rod (7) is movably installed on the negative pressure suction hole (6), one end of the movable push rod (7) is connected to an adjusting rod (8), a squeezing operation stretching assembly is provided on one side of the inner partition (2), the squeezing operation stretching assembly is adapted to the adjusting rod (8), and a contact sealing assembly is provided on one side of the clamping frame (1).

2. The clamping structure for an adaptive thin-walled frame-shaped part according to claim 1, characterized in that, A compression spring (9) is fixedly installed between the side of the movable push rod (7) and the side of the inner partition (2), and the compression spring (9) is sleeved on the adjusting rod (8).

3. The clamping structure for an adaptive thin-walled frame-shaped part according to claim 1, characterized in that, The extrusion operation stretching assembly includes a telescopic cylinder (11) fixedly installed on the side of the inner partition (2), and the output end of the telescopic cylinder (11) is connected to a push plate (12).

4. The clamping structure for an adaptive thin-walled frame-shaped part according to claim 3, characterized in that, A plurality of driving rods (13) are fixedly installed on one side of the push plate (12), a plurality of connecting blocks (14) are fixedly installed on one side of the driving rods (13), and an arc-shaped extrusion block (15) is fixedly installed on one side of the plurality of connecting blocks (14).

5. The clamping structure for an adaptive thin-walled frame-shaped part according to claim 4, characterized in that, The arc-shaped extrusion block (15) has an arc-shaped surface (16) on one side, and an adjustment hole (10) is provided on one side of the adjustment rod (8). The adjustment hole (10) is adapted to the arc-shaped surface (16), and the arc-shaped extrusion block (15) is located on one side of the adjustment rod (8).

6. The clamping structure for an adaptive thin-walled frame-shaped part according to claim 1, characterized in that, A vacuum pump (5) is provided on one side of the clamping frame (1), and the vacuum pump (5) is connected to the negative pressure chamber (3).

7. The clamping structure for an adaptive thin-walled frame-shaped part according to claim 1, characterized in that, The contact sealing assembly includes multiple outer slots (17) opened on the side of the clamping frame (1). The outer slots (17) are square in shape and an outer sealing ring (18) is installed on the outer slots (17).

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