A device for clamping large double-cylindrical thin-walled parts

Abstract

The utility model provides a device for clamping large -scale double -barrel shaped thin -walled spare, including base and two arc fixed parts, two arc fixed parts are opposite through the sliding assembly opening and set up in the upper surface of base, arc fixed part bottom respectively articulate in sliding assembly, all are provided with locking piece in top, the inner wall of arc fixed part is compatible with the structure of the clamped part, when using, through can be close or far from two arc fixed parts, will the double -barrel shaped thin -walled spare of clamping respectively fixed, because the two parallel cylindrical parts in double -barrel shaped thin -walled spare are fixed respectively, therefore, its relative position is more stable in turning and milling process, simultaneously, lock two arc fixed parts through locking piece, can provide the same locking force to two parallel two cylindrical parts, the stress that both sides bear is same in turning and milling process, and then avoids the risk of local deformation.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing technology, specifically relating to a device for clamping large double-cylinder thin-walled parts. Background Technology

[0002] In the aerospace manufacturing field, bi-cylinder thin-walled cylindrical components are key parts with high design precision, complex structural features, and stringent performance requirements. They are widely used in core components such as engine casings, fuselage load-bearing structures, fuel tanks, and attitude control system piping. Their manufacturing is challenging and requires sophisticated processes, making them a crucial indicator of aerospace manufacturing capabilities.

[0003] Machining double-cylinder thin-walled parts presents numerous challenges. These parts are prone to elastic deformation under clamping force, and springback occurs after unloading during turning. Furthermore, these cylindrical parts require precision in roundness and coaxiality. Existing technologies typically employ a "one-clamp, one-cushion" method during turning, where a four-jaw chuck clamps one end of the cylindrical part, and a tail-end clamp holds it at the other. This method is only suitable for single-cylinder structures and is unsuitable for machining these types of parts. In actual milling and turning processes, double-cylinder thin-walled parts often experience vibration and deformation. Therefore, this application aims to provide an auxiliary fixture for machining double-cylinder thin-walled parts. Utility Model Content

[0004] In order to overcome the shortcomings of existing technologies that cannot stably clamp double-cylinder thin-walled cylindrical parts, this utility model provides a device for clamping large double-cylinder thin-walled parts.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A device for clamping large double-cylindrical thin-walled parts includes a base and two arc-shaped fixing members. The two arc-shaped fixing members are disposed opposite to each other on the upper surface of the base through openings of a sliding assembly. The bottom ends of the arc-shaped fixing members are respectively hinged to the sliding assembly, and the top ends of each are provided with locking members. The inner walls of the arc-shaped fixing members are adapted to the structure of the part to be clamped.

[0007] Furthermore, the sliding assembly includes two parallel guide rails spaced apart on the upper surface of the base, and two sliding tables slidably disposed on the guide rails.

[0008] The upper surface of the slide is provided with a rotating support, and the two slides located on the guide rail are hinged to the bottom end of the same arc-shaped fixing member through the rotating support.

[0009] Furthermore, the bottom end of the arc-shaped fixing member is hinged to the rotating support via a rotating shaft.

[0010] Furthermore, the opening and closing angle of the arc-shaped fixing member around the rotation axis is ≥120°.

[0011] Furthermore, the slide sidewall is provided with a brake thread mounting hole, and a fixing screw is internally threaded into the brake thread mounting hole. The end of the fixing screw passes through the brake thread mounting hole and abuts against the sidewall of the base.

[0012] Furthermore, the length of the guide rail is perpendicular to the vertical projection of the axis of the workpiece to be clamped.

[0013] Furthermore, the inner wall of the arc-shaped fastener is provided with an elastic material.

[0014] Furthermore, the locking element includes locking grooves respectively disposed at the top ends of the two arc-shaped fixing elements, and a locking bolt assembly passing through the two locking grooves.

[0015] The beneficial effects of this utility model are:

[0016] This utility model provides a device for clamping large double-cylindrical thin-walled parts, including a base and two arc-shaped fixing members. The two arc-shaped fixing members are disposed opposite each other on the upper surface of the base through the opening of the sliding component. The bottom ends of the arc-shaped fixing members are respectively hinged to the sliding component, and the top ends of each are provided with locking members. The inner wall of the arc-shaped fixing members is adapted to the structure of the part to be clamped. In use, the double-cylindrical thin-walled parts to be clamped can be fixed separately by moving closer to or further away from the two arc-shaped fixing members. Since the two parallel cylindrical parts in the double-cylindrical thin-walled parts are fixed separately, their relative positions are more stable during milling. At the same time, locking the two arc-shaped fixing members with locking members can provide the same locking force to the two parallel cylindrical parts. During milling, the stress on both is the same, thereby avoiding the risk of local deformation. Attached Figure Description

[0017] Figure 1 A schematic diagram of a device for clamping a large double-cylindrical thin-walled component according to an embodiment of the present disclosure is shown;

[0018] Figure 2 A schematic diagram of the structure of the arc-shaped fastener according to an embodiment of the present disclosure is shown;

[0019] Figure 3 A schematic diagram of the structure of the sliding component according to an embodiment of the present disclosure is shown;

[0020] Figure 4 A schematic diagram of the structure for clamping a large double-cylinder thin-walled component according to an embodiment of the present disclosure is shown.

[0021] In the diagram, 1-base; 2-guide rail; 3-slide table; 4-rotating support; 5-arc-shaped fastener; 6-fixing screw; 7-rotating shaft; 8-locking groove; 9-locking bolt assembly. Detailed Implementation

[0022] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] In this embodiment of the disclosure, Figure 1 A schematic diagram of a device for clamping a large double-cylindrical thin-walled component according to an embodiment of the present disclosure is shown, as follows: Figure 1 As shown, this device can provide stable bearing force to two parallel cylindrical parts by being able to approach or move away from the two arc-shaped fixing members 5, thereby ensuring the stability of the double cylindrical thin-walled parts during milling and turning, and thus avoiding the risk of local deformation.

[0024] In this embodiment, a device for clamping a large double-cylindrical thin-walled component includes a base 1 and two arc-shaped fixing members 5. The two arc-shaped fixing members 5 are disposed opposite each other on the upper surface of the base 1 through openings in a sliding assembly. The bottom ends of the arc-shaped fixing members 5 are respectively hinged to the sliding assembly, and each has a locking member at its top. The inner wall of each arc-shaped fixing member 5 is adapted to the structure of the component to be clamped. Specifically, Figure 2 A schematic diagram of the structure of the arc-shaped fastener 5 according to an embodiment of the present disclosure is shown, as follows: Figure 2 As shown, the arc-shaped fastener 5 is a semi-circular arc-shaped steel plate with a certain width. When two arc-shaped fasteners 5 are closed, they form a complete circle. It should also be noted that the arc-shaped fastener 5 is designed with multiple structures of different large diameters to adapt to double-cylinder thin-walled parts with different outer diameters.

[0025] In this embodiment of the disclosure, Figure 3 A schematic diagram of the structure of the sliding component according to an embodiment of the present disclosure is shown, such as... Figure 3 As shown, the sliding assembly includes two parallel guide rails 2 spaced apart on the upper surface of the base 1, and a slide table 3 slidably disposed on the guide rails 2; the upper surface of the slide table 3 is provided with a rotating support 4, and the two slide tables 3 located on the guide rails 2 are hinged to the bottom end of the same arc-shaped fixing member 5 through the rotating support 4.

[0026] The bottom end of the arc-shaped fixing member 5 is hinged to the rotating support 4 via a rotating shaft 7.

[0027] Specifically, the rotating support 4 includes a horizontally arranged plate and a vertically arranged fixing block on the plate. The plate is detachably connected to the upper surface of the slide table 3 by fastening screws. The fixing block has a through hole for interference fit through the rotating shaft 7. The bottom end of the arc-shaped fixing member 5 also has a through hole for interference fit through the rotating shaft 7.

[0028] The arc-shaped fixing member 5 can rotate around the rotating axis 7, with an opening and closing angle of ≥120°, which is used to reserve operating space and solve the problem of interference during hoisting caused by the excessive size of large double-cylinder thin-walled parts.

[0029] In this embodiment, the slide 3 has a brake threaded mounting hole on its side wall. A fixing screw 6 is threaded into the brake threaded mounting hole, and the end of the fixing screw 6 passes through the brake threaded mounting hole and abuts against the side wall of the base 1. By tightening the fixing screw 6, the position of the slide 3 relative to the guide rail 2 can be locked and fixed, which can adapt to the processing needs of cylindrical parts of different diameters.

[0030] Figure 4 A schematic diagram of the structure for clamping a large double-cylindrical thin-walled component according to an embodiment of the present disclosure is shown, as follows: Figure 4 As shown, the length of the guide rail 2 is perpendicular to the vertical projection of the axis of the workpiece to be clamped. On the one hand, this can improve the radial positioning accuracy of the workpiece to be clamped. On the other hand, the milling process is usually carried out in the radial direction or perpendicular to the axis of the workpiece to be clamped, which can directly offset the radial force, reduce vibration or deformation, and thus enhance the cutting force resistance of the workpiece to be clamped.

[0031] In this embodiment, the inner wall of the arc-shaped fixing member 5 is provided with an elastic material. Specifically, the elastic material is rubber. The high elasticity of rubber allows it to absorb the impact and vibration during the extrusion process. At the same time, the softness of rubber avoids direct friction and reduces surface damage.

[0032] In this embodiment, the locking element includes locking grooves 8 respectively disposed at the top ends of the two arc-shaped fixing elements 5, and a locking bolt assembly 9 passing through the two locking grooves 8. Specifically, the arc-shaped fixing elements 5 are integrally formed with the locking grooves 8 and are vertically disposed at the top ends of the arc-shaped fixing elements 5. Through the tightening process of the bolt assembly 9, the two arc-shaped fixing elements 5 are brought closer together, forming a compression and fixation of the clamped part.

[0033] When using this device, the following steps are included:

[0034] According to the outer diameter of the part to be clamped, select two arc-shaped fixing parts 5 of the corresponding size, and install the two selected arc-shaped fixing parts 5 on the sliding assembly respectively;

[0035] Rotate the two arc-shaped fixing members 5 around the rotation axis 7 to the maximum opening position;

[0036] The part to be clamped is hoisted to the preset clamping position. The two arc-shaped fixing parts 5 are brought close together by the sliding component, so that the inner wall of the arc-shaped fixing parts 5 respectively wraps the outer wall of the part to be clamped.

[0037] The locking bolt assembly 9 locks the locking groove 8 by applying the preset tightening force, thus completing the locking and clamping of the workpiece to be clamped.

Claims

1. A device for clamping large double-cylindrical thin-walled parts, characterized in that, It includes a base (1) and two arc-shaped fixing parts (5). The two arc-shaped fixing parts (5) are disposed opposite to each other on the upper surface of the base (1) through the opening of the sliding component. The bottom ends of the arc-shaped fixing parts (5) are respectively hinged to the sliding component, and the top ends are provided with locking parts. The inner wall of the arc-shaped fixing parts (5) is adapted to the structure of the object to be clamped.

2. The device for clamping large double-cylindrical thin-walled parts according to claim 1, characterized in that, The sliding assembly includes two parallel guide rails (2) spaced apart on the upper surface of the base (1), and two slides (3) slidably disposed on the guide rails (2). The upper surface of the slide (3) is provided with a rotating support (4), and the two slides (3) located on the guide rail (2) are hinged to the bottom end of the same arc-shaped fixing member (5) through the rotating support (4).

3. The device for clamping large double-cylindrical thin-walled parts according to claim 2, characterized in that, The bottom end of the arc-shaped fixing member (5) is hinged to the rotating support (4) via a rotating shaft (7).

4. The device for clamping large double-cylindrical thin-walled parts according to claim 3, characterized in that, The opening and closing angle of the arc-shaped fixing member (5) around the rotation axis (7) is ≥120°.

5. The device for clamping large double-cylindrical thin-walled parts according to claim 2, characterized in that, The slide (3) has a brake thread mounting hole on its side wall. A fixing screw (6) is threaded into the brake thread mounting hole. The end of the fixing screw (6) passes through the brake thread mounting hole and abuts against the side wall of the base (1).

6. The device for clamping large double-cylindrical thin-walled parts according to claim 2, characterized in that, The length of the guide rail (2) is perpendicular to the vertical projection of the axis of the clamping part.

7. The device for clamping large double-cylindrical thin-walled parts according to claim 1, characterized in that, The inner wall of the arc-shaped fastener (5) is provided with an elastic material.

8. The device for clamping large double-cylindrical thin-walled parts according to claim 1, characterized in that, The locking element includes locking grooves (8) respectively disposed at the top of the two arc-shaped fixing elements (5), and a locking bolt assembly (9) passing through the two locking grooves (8).

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