Special riveting clamp for preventing skin from sinking during riveting of aircraft skin

Abstract

The utility model relates to the technical field of aviation tools, in particular to a special riveting clamp for preventing a skin from sinking during riveting of the skin of an airplane, which comprises a riveting clamp structure, a pressing sheet and a spring. The riveting and clamping structure comprises a hammering part and a riveting part; the upper end of the hammering part is a hammering head, the middle part is provided with a shaft shoulder, and the lower end is a first rod-shaped structure; the upper end of the riveting part is a second rod-shaped structure, and the lower end is a riveting head; the lower end of the hammering part is fixedly connected to the upper end of the riveting part; the pressing piece is arranged between the hammering part and the riveting part in a sleeved mode, and a first round hole and a second round hole which are through are formed in the center of the interior of the pressing piece along the axis. The rod-shaped structure on the riveting and clamping structure can smoothly move up and down in the first round hole, and the second round hole can accommodate the riveting head; a skin baffle is arranged at the lower end of the pressing piece, and the spring is arranged above the pressing piece. According to the utility model, the pressing sheet always abuts against the skin through the spring, the pressing action area of the pressing sheet on the skin is effectively increased, the skin is prevented from being locally sunken, and the riveting surface quality of the skin is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation tooling, in particular to a special riveting clamp for preventing the skin of an aircraft from denting when riveting the skin of the aircraft. Background Technique

[0002] The skin is the outer covering of an aircraft and is the main component for maintaining the shape of the aircraft. At the same time, the skin directly faces the airflow and also undertakes a certain function of transmitting aerodynamic loads, which is crucial for the safety of the aircraft. Since the skin directly faces the airflow, when installing the skin onto the fuselage frame, it must be ensured that the surface is smooth without pits.

[0003] Currently, the skin is mainly riveted to the aircraft frame through rivets. During the process of riveting the skin, a riveting clamp needs to be used in cooperation with a riveting gun. The force of the riveting gun acts on the rivet through the riveting clamp to form the rivet. Since the skins of most modern aircraft are very thin, when riveting thin skins, if there is a large gap between the upper and lower skins or between the skin and the frame and the gap cannot be eliminated, when using a traditional riveting clamp for riveting, due to the relatively small force-applying end face at the end of the traditional riveting clamp, the skin around the riveting point is extremely prone to warping, resulting in pits on the skin surface and affecting the surface quality. The surface pits not only affect the appearance but also cause increased turbulence and flight resistance, directly affecting the aerodynamic performance of the aircraft. For supersonic and hypersonic aircraft, the adverse effects brought by the problem of skin denting are even greater. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a special riveting clamp for preventing the skin of an aircraft from denting when riveting the skin of the aircraft, which can effectively prevent the appearance of dents when riveting thin skins.

[0005] The technical solution of the utility model is as follows:

[0006] A special riveting clamp for preventing the skin of an aircraft from denting when riveting the skin of the aircraft, comprising a riveting clamp structure, a pressing piece and a spring;

[0007] The riveting clamp structure includes a hammering part and a riveting part; the upper end of the hammering part is a hammering head for connecting a pneumatic riveting gun; a shoulder is provided in the middle for installation and limitation; the lower end is a first rod-shaped structure; the upper end of the riveting part is a second rod-shaped structure with a diameter matching that of the first rod-shaped structure; the lower end is a riveting head; the bottom surface of the riveting head is the force-applying end face of the riveting clamp;

[0008] The pressing piece has an upper and lower two-stage cylindrical structure; the diameter of the upper section of the pressing piece is smaller than that of the lower section, which is convenient for hand-held operation; a first round hole is provided along the axis in the center of the upper section of the pressing piece, and the diameter of the first round hole matches the first rod-shaped structure and the second rod-shaped structure on the riveting and clamping structure; a spring stop is provided at the upper end of the upper section of the pressing piece; a second round hole is provided along the axis in the center of the lower section of the pressing piece, and the riveting head of the riveting part of the riveting and clamping structure can be accommodated in the second round hole; the second round hole and the first round hole are connected and axially penetrate the entire pressing piece; a skin stop is provided at the lower end of the lower section of the pressing piece, which is used to tightly press the skin during riveting; a pair of U-shaped notches are symmetrically provided in the circumferential direction at the lower end of the lower section of the pressing piece, which is convenient for taking the rivet and visually observing the forming situation of the rivet head during the riveting process;

[0009] The second rod-shaped structure at the upper end of the riveting part of the riveting and clamping structure passes through the first round hole from below the second round hole of the lower section of the pressing piece; the spring is sleeved on the second rod-shaped structure from above the first round hole, and the lower end of the spring abuts against the spring stop at the upper end of the upper section of the pressing piece; the first rod-shaped structure at the lower end of the hammering part of the riveting and clamping structure passes through the spring from top to bottom and is fixedly connected to the second rod-shaped structure, and the shoulder of the hammering part of the riveting and clamping structure presses the upper end of the spring to keep the spring in a compressed state; the first rod-shaped structure and the second rod-shaped structure on the riveting and clamping structure can slide up and down smoothly in the first round hole of the pressing piece after being connected.

[0010] Further, a threaded rod is provided at the lower end of the first rod-shaped structure of the hammering part of the riveting and clamping structure; a corresponding threaded hole is provided on the upper end surface of the second rod-shaped structure of the riveting part of the riveting and clamping structure; the first rod-shaped structure is coaxially and fixedly connected to the second rod-shaped structure by threads.

[0011] Further, the stiffness coefficient of the spring is selected according to the required pressing force; the diameter size of the lower section of the pressing piece is selected according to the rivets of different license plates used.

[0012] Further, the riveting and clamping structure, the pressing piece and the spring are made of tool steel.

[0013] During specific use, put the hammering head of the hammering part of the above-mentioned riveting and clamping into a pneumatic riveting gun, hold the upper section of the pressing piece by hand, press the skin stop at the front end of the lower section of the pressing piece against the skin, and at the same time press the riveting head of the riveting part of the riveting and clamping against the rivet to be riveted, then the riveting can be started; during the riveting process, the spring always provides a pressing force, and the skin stop at the front end of the lower section of the pressing piece can effectively increase the pressing area on the skin and prevent local depression of the skin.

[0014] Beneficial effects

[0015] The present utility model provides a special riveting clamp for preventing the skin of an aircraft from being sunken during riveting. By dividing the structure of the riveting clamp into a hammering part and a riveting part, a spring and a pressing piece are introduced in the middle. During riveting, the pressing piece always presses tightly against the skin through the elastic force of the spring. The skin stopper at the lower section of the pressing piece can effectively increase the pressing area of the skin during riveting, thereby preventing the skin around the riveting point from warping, effectively preventing the appearance of sunken areas on the skin surface, and improving the surface quality of skin riveting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0017] Figure 2 It is a schematic diagram of the riveting clamp structure of an embodiment of the present utility model;

[0018] Figure 3 It is a schematic diagram of the pressing piece structure of an embodiment of the present utility model;

[0019] Among them, Figure 3 (a) is an isometric view of the overall pressing piece, Figure 3 (b) is a schematic sectional view of the pressing piece;

[0020] Figure 4 It is a schematic diagram of the overall assembly of an embodiment of the present utility model;

[0021] Among them, Figure 4 (a) is a schematic diagram before the spring is inserted, Figure 4 (b) is a schematic diagram after the spring is inserted;

[0022] Figure 5 It is a schematic diagram of the working principle of an embodiment of the present utility model;

[0023] In the figure: 1 - hammering part of the riveting clamp structure; 11 - hammering head; 12 - shoulder; 13 - first rod-shaped structure; 14 - threaded rod; 2 - riveting part of the riveting clamp structure; 21 - second rod-shaped structure; 22 - riveting head; 23 - threaded hole; 3 - pressing piece; 31 - upper section of the pressing piece; 311 - first round hole; 312 - spring stopper; 32 - lower section of the pressing piece; 321 - second round hole; 322 - skin stopper; 323 - U-shaped notch; 4 - spring; 5 - skin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following further describes the present utility model in detail in conjunction with the description of the drawings and the detailed description of the embodiments:

[0025] An embodiment of the present utility model is as Figure 1 shown. A special riveting clamp for preventing the skin of an aircraft from being sunken during riveting includes a riveting clamp structure, a pressing piece 3, and a spring 4;

[0026] As Figure 2As shown, the riveting and clamping structure includes a hammering part 1 and a riveting part 2; the upper end of the hammering part 1 is a hammering head 11 for connecting a pneumatic riveting gun; a shoulder 12 is provided in the middle for installation and limitation; the lower end is a first rod-shaped structure 13; the upper end of the riveting part 2 is a second rod-shaped structure 21 with a diameter matching that of the first rod-shaped structure 13; the lower end is a riveting head 22; the bottom surface of the riveting head 22 is the force-applying end surface for riveting and clamping.

[0027] As Figure 3 shown, the pressing piece 3 is an upper and lower two-section cylindrical structure; the diameter of the upper section 31 of the pressing piece is smaller than that of the lower section 32, which is convenient for hand-held operation; a first circular hole 311 is provided along the axis in the center of the upper section 31 of the pressing piece, and the diameter of the first circular hole 311 matches that of the first rod-shaped structure 13 and the second rod-shaped structure 21 on the riveting and clamping structure; a spring stop 312 is provided at the upper end of the upper section 31 of the pressing piece; a second circular hole 321 is provided along the axis in the center of the lower section 32 of the pressing piece, and the riveting head 22 of the riveting part 2 of the riveting and clamping structure can be accommodated in the second circular hole 321; the second circular hole 321 and the first circular hole 312 are connected and axially penetrate the entire pressing piece 3; a skin stop 322 is provided at the lower end of the lower section 32 of the pressing piece for tightly pressing against the skin 5 during riveting; a pair of U-shaped notches 323 are symmetrically provided in the circumferential direction at the lower end of the lower section 32 of the pressing piece, which is convenient for taking the rivet and visually observing the forming situation of the rivet head during the riveting process.

[0028] As Figure 4 and Figure 5 shown, the second rod-shaped structure 21 at the upper end of the riveting part 2 of the riveting and clamping structure passes through the first circular hole 311 from below the second circular hole 321 of the lower section 32 of the pressing piece; the spring 4 is sleeved on the second rod-shaped structure 21 from above the first circular hole 311, and the lower end of the spring 4 abuts against the spring stop 312 at the upper end of the upper section 31 of the pressing piece; the first rod-shaped structure 13 at the lower end of the hammering part 1 of the riveting and clamping structure passes through the spring 4 from top to bottom and is fixedly connected to the second rod-shaped structure 21, and the shoulder 12 of the hammering part 1 of the riveting and clamping structure presses the upper end of the spring 4 to keep the spring in a compressed state; the first rod-shaped structure 13 and the second rod-shaped structure 21 on the riveting and clamping structure can slide smoothly up and down in the first circular hole 311 of the pressing piece 3 after being connected.

[0029] In this embodiment, a threaded rod 14 is provided at the lower end of the first rod-shaped structure 13 of the hammering part 1 of the riveting and clamping structure; a corresponding threaded hole 23 is provided on the upper end surface of the second rod-shaped structure 21 of the riveting part 2 of the riveting and clamping structure; the first rod-shaped structure 13 is coaxially and fixedly connected to the second rod-shaped structure 21 through threads, as Figure 2 shown.

[0030] In this embodiment, the stiffness coefficient of the spring 4 is selected according to the required pressing force; the diameter size of the lower section 32 of the pressing piece is selected according to different types of rivets used.

[0031] In this embodiment, the riveting clamp structure, the pressing piece 3 and the spring 4 are made of tool steel.

[0032] During specific use, place the hammer head 11 of the hammering part 1 of the above-mentioned riveting clamp into a pneumatic riveting gun, hold the upper part of the pressing piece by hand, press the skin stop 322 at the front end of the lower section 32 of the pressing piece against the skin 5, and at the same time press the riveting head 22 of the riveting part 2 of the riveting clamp against the rivet to be riveted, then the riveting can be started; during the riveting process, the spring 4 always provides a pressing force, and the skin stop 322 at the front end of the lower section 32 of the pressing piece can effectively increase the pressing area on the skin and prevent local depression of the skin.

[0033] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principle and purpose of the present invention.

Claims

1. A special riveting clamp for preventing the skin of an aircraft from denting during riveting, characterized in that: It includes a riveting clamp structure, a pressing piece and a spring; The riveting clamp structure includes a hammering part and a riveting part; the upper end of the hammering part is a hammering head for connecting a pneumatic riveting gun; a shoulder is provided in the middle for installation and limitation; the lower end is a first rod-shaped structure; the upper end of the riveting part is a second rod-shaped structure with a diameter matching that of the first rod-shaped structure; the lower end is a riveting head; the bottom surface of the riveting head is the riveting force application end face; The pressing piece is an upper and lower two-section cylindrical structure; the diameter of the upper section of the pressing piece is smaller than that of the lower section, which is convenient for hand operation; a first round hole is provided along the axis in the center of the upper section of the pressing piece, and the diameter of the first round hole matches the first rod-shaped structure and the second rod-shaped structure on the riveting clamp structure; a spring stop is provided at the upper end of the upper section of the pressing piece; a second round hole is provided along the axis in the center of the lower section of the pressing piece, and the riveting head of the riveting part of the riveting clamp structure can be accommodated in the second round hole; the second round hole and the first round hole are connected and axially penetrate the entire pressing piece; a skin stop is provided at the lower end of the lower section of the pressing piece for tightly pressing the skin during riveting; a pair of U-shaped notches are symmetrically provided in the circumferential direction at the lower end of the lower section of the pressing piece, which is convenient for taking the rivet and visually observing the forming situation of the rivet head during the riveting process; The second rod-shaped structure at the upper end of the riveting part of the riveting clamp structure passes through the first round hole from below the second round hole of the lower section of the pressing piece; the spring is sleeved on the second rod-shaped structure from above the first round hole, and the lower end of the spring abuts against the spring stop at the upper end of the upper section of the pressing piece; the first rod-shaped structure at the lower end of the hammering part of the riveting clamp structure passes through the spring from top to bottom and is fixedly connected to the second rod-shaped structure, and the shoulder of the hammering part of the riveting clamp structure presses the upper end of the spring to keep the spring in a compressed state; the first rod-shaped structure and the second rod-shaped structure on the riveting clamp structure can slide up and down smoothly in the first round hole of the pressing piece after being connected; 2. The special riveting clamp for preventing the skin of an aircraft from denting during riveting the skin of the aircraft according to claim 1, characterized in that: A threaded rod is provided at the lower end of the first rod-shaped structure of the hammering part of the riveting clamp structure; a corresponding threaded hole is provided on the upper end face of the second rod-shaped structure of the riveting part of the riveting clamp structure; the first rod-shaped structure is coaxially fixedly connected to the second rod-shaped structure by threads; 3. The special riveting clamp for preventing skin depression during riveting of aircraft skin according to claim 1, characterized in that: The stiffness coefficient of the spring is selected according to the required pressing force; the diameter size of the lower section of the pressing piece is selected according to different types of rivets used; 4. The special riveting clamp for preventing the aircraft skin from denting during riveting the aircraft skin according to claim 1, wherein: The riveting clamp structure, the pressing piece and the spring are made of tool steel.

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