Adjustable infrared fairing self-centering clamp

Abstract

The invention provides an adjustable infrared fairing self-centering clamp which comprises a fine adjustment mechanism, a shell, a transmission mechanism and a clamping mechanism, and the fine adjustment mechanism is composed of a precise pitching table and a two-dimensional precise displacement table; the transmission mechanism is composed of a worm gear and a worm, one end of the worm is provided with internal threads and connected with the fixing shaft, the other end of the worm is embedded in the rotating shaft, and the upper surface of the worm gear is connected with the track disc through a bolt. The clamping mechanism is composed of a roller, a roller shaft, a sliding rail and a clamping jaw, the roller is fixed to the track disc through a limiting groove, and the clamping jaw is connected with a sliding block on the sliding rail through a bolt; the shell is composed of a base, a round cover and a cover plate. According to the clamp device, the eight clamping jaws are designed, clamping and fixing of the fairing can be achieved through cooperation of the clamping jaws, the clamping jaws can clamp the interior and the exterior of the infrared fairing at the same time, deformation and stress concentration of the infrared fairing are greatly reduced, the sizes of the clamping jaws can be modified according to requirements, clamping of different types of infrared fairing is achieved, and universality is high.

Description

Technical Field

[0001] The invention belongs to the technical field of fairing processing tooling, and in particular relates to an adjustable infrared fairing self-centering fixture. Background Art

[0002] As a key component in infrared missiles and infrared imaging technology, the processing accuracy of infrared fairings is directly related to the performance of infrared windows. With the introduction of femtosecond laser technology, the processing accuracy and surface quality of infrared fairings have been significantly improved. However, due to the diversity of shapes and sizes of infrared fairings, traditional fixed fixtures cannot meet the processing requirements of different infrared fairings, which leads to positioning errors and low processing efficiency during the processing. In order to solve this problem, it is particularly important to invent an adjustable infrared fairing self-centering fixture. This fixture can automatically adapt to infrared fairings of different sizes and ensure the stability and accuracy of the workpiece during the processing through a precise centering mechanism. Its adjustability not only improves the processing efficiency, but also the self-centering function reduces the operator's manual adjustment of the workpiece, reduces human errors, and improves the automation of the processing process. Therefore, this adjustable infrared fairing self-centering fixture is of great significance for improving the processing quality of infrared fairings, reducing costs, and shortening production cycles. It is one of the key technologies for achieving high-precision and high-efficiency femtosecond laser processing of infrared fairings.

[0003] Patent document CN201910409234.4 discloses a fairing clamp. Compared with the traditional fairing clamp, its advantage is that it can be used to clamp fairings of different sizes and has strong versatility, but the accuracy is reduced due to the need for human intervention during the clamping process, and there is a lack of fine-tuning mechanism.

[0004] Patent document CN202211611565.4 discloses a processing method and device for rapid milling of large optical fairing parts. Compared with traditional fairing fixtures, its advantage is that it can select vacuum adsorption clamping mode, the part and the fixture have a large fitting area, the stress generated during part clamping is reduced, and the deformation of the part during milling is small. However, since infrared fairings are often very thin, they are easy to break under vacuum adsorption, and the clamping accuracy cannot be guaranteed. Summary of the invention

[0005] In view of this, the present invention aims to propose an adjustable infrared fairing self-centering fixture suitable for femtosecond laser micro-group controlled anti-reflection microstructure processing.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] An adjustable infrared fairing self-centering fixture is characterized in that it includes a fine-tuning mechanism, a shell, a transmission mechanism, and a clamping mechanism; the fine-tuning mechanism is composed of a precision pitch platform and a two-dimensional precision displacement platform; the shell is composed of a base, a round cover, and a cover plate; the transmission mechanism is mainly composed of a worm wheel and a worm, wherein one end of the worm is provided with an internal thread connected to a fixed shaft, and the other end is embedded in a rotating shaft, and the upper surface of the worm wheel is connected to a track disc by bolts; the clamping mechanism is composed of a roller, a roller shaft, a slide rail, and a clamping claw, wherein the roller is fixed to the track disc by a limit groove, and the clamping claw is connected to a slider on the slide rail by bolts.

[0008] Furthermore, the base and the round cover in the shell are fixed by bolts, and the round cover, the cover plate and the slide rail are fixed by bolts.

[0009] Furthermore, the circular cover in the shell contains two linear channels, and the linear channels are used to fix the fixed axis and the rotating axis.

[0010] Furthermore, the upper surface of the cover plate in the shell includes a slide rail, and a boss is provided inside the cover plate to fix and limit the slide rail grooves at both ends of the slide rail.

[0011] Furthermore, the transmission mechanism also includes a base bearing, a transmission shaft, and a linear bearing, wherein the base bearing is connected to the base by bolts, the transmission shaft and the base bearing are fixed by interference fit, and the linear bearing is fixed in the two linear channels of the circular cover by top screws.

[0012] Furthermore, the track disc contains four identical tracks for roller movement.

[0013] Furthermore, one end of the roller shaft is connected to the roller, and the other end is connected to the slider.

[0014] Furthermore, the clamping jaw and the sliding block are fixed by bolts.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] (1) The fixture is equipped with a fine-tuning mechanism to ensure the precise positioning of the infrared fairing during femtosecond laser processing;

[0017] (2) The fixture is flexible in design and can accommodate infrared domes of different sizes. By adjusting the size of the jaws, the fixture can quickly adapt to the processing requirements of different parts, improving production efficiency and processing flexibility;

[0018] (3) The fixture adopts internal and external clamping at the same time, which greatly reduces the deformation and stress concentration of the infrared fairing;

[0019] (4) The worm gear structure and the slide rail mechanism are simple in structure, and self-locking during the clamping process prevents parts from loosening;

[0020] (5) The fixture is commonly used in femtosecond laser anti-reflection and femtosecond laser welding processes and is applicable to a wide range of processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the practical application of the adjustable infrared fairing self-centering fixture in the embodiment.

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the adjustable infrared fairing self-centering fixture in the embodiment when viewed from top.

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the adjustable infrared fairing self-centering fixture in the main viewing direction in the embodiment.

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the adjustable infrared fairing self-centering fixture in the embodiment when viewed from top.

[0025] Figure 5 Schematic diagram of the internal three-dimensional structure of the adjustable infrared fairing self-centering fixture in the embodiment.

[0026] Figure 6 Schematic diagram of the cross-sectional structure of the adjustable infrared fairing self-centering fixture in the embodiment.

[0027] Figure 7 Schematic diagram of the cross-sectional structure of the adjustable infrared fairing self-centering fixture in the embodiment.

[0028] In the figure; 1-clamping claw, 2-slider, 3-slide rail, 4-track disc, 5-roller shaft, 6-roller, 7-cover, 8-round cover, 9-fixed shaft, 10-worm gear, 11-worm, 12-linear bearing, 13-rotating shaft, 14-knob, 15-base bearing, 16-base, 17-precision pitch table, 18-precision two-dimensional displacement table, 19-transmission shaft, 20-housing, 21-fine-tuning mechanism, 22-transmission mechanism, 23-clamping mechanism. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0030] An adjustable infrared dome self-centering fixture includes a fine-tuning mechanism 21, a housing 20, a transmission mechanism 22, and a clamping mechanism 23. The fine-tuning mechanism is composed of a precision pitching platform 17 and a two-dimensional precision displacement platform 18; the housing is composed of a base 16, a round cover 8, and a cover plate 7; the transmission mechanism is composed of a worm wheel 10 and a worm 11, wherein one end of the worm 11 is provided with an internal thread connected to a fixed shaft 9, and the other end is embedded in a rotating shaft 13, and the upper surface of the turbine 10 is connected to a track disc 4 by bolts; the clamping mechanism is composed of a roller 6, a roller shaft 5, a slide rail 3, and a clamping jaw 1, wherein the roller 6 is fixed to the track disc 4 by a limit groove, and the clamping jaw 1 is connected to a slider on the slide rail 3 by bolts.

[0031] The precision pitching platform 17 is fixed to the two-dimensional precision displacement platform 18 by bolts, and the two-dimensional precision displacement platform 18 is fixed to the base 16 by bolts.

[0032] The base bearing 15 is fixed to the base 16 by bolts, the transmission shaft 19 is fixed with the base bearing 15 by interference fit, and the transmission shaft 19 is fixed with the worm wheel 10 and the track disc 4 at the same time, and the worm wheel 10 and the track disc 4 are connected by bolts.

[0033] The linear bearing 12 is fixed in the linear channels on both sides of the circular cover 8 by means of top screws. The fixed shaft 9 is fixed by means of the linear bearing 12 at one end and is threadedly connected with the worm 11. The rotating shaft 13 is fixed to the linear bearing at the other end. The worm 11 is gear-engaged with the worm wheel 10. The other end of the worm 11 is embedded in the rotating shaft 13, and a knob 14 is provided on the rotating shaft.

[0034] like Figure 6 As shown: One end of the worm is connected to the fixed shaft, and the other end is embedded in the rotating shaft, which contains a linear bearing to facilitate the rotation of the worm.

[0035] The roller 6 is fixed to the track disc 4 through a limiting groove, the roller 6 is matched with the roller shaft 5, the other end of the roller shaft 5 is matched with the slider 2, and the slider 2 is fixed to the clamping jaw 1 through bolts.

[0036] like Figure 7 As shown: The track disc contains a boss to limit the roller and prevent it from moving up and down.

[0037] The circular cover 8 is fixed to the base 16 by bolts, and the circular cover 8 is fixed to the cover plate 7 and the slide rail 3 by bolts, and the slide block 2 is free to slide in the slide rail 3.

[0038] like Figure 5 As shown: Since the rollers connected to the two sliders on the same slide rail are on tracks in two opposite directions, when the worm gear rotates, the two sliders will drive the clamping claws to move in opposite directions, thereby achieving a clamping effect.

[0039] The use process of the adjustable infrared fairing self-centering fixture is as follows:

[0040] (1) First, place the infrared fairing part on the upper surface of the cover plate, turn the knob to control the simultaneous movement of the clamping jaws, and clamp the curved thin-walled part.

[0041] (2) Secondly, a femtosecond laser is used to scratch a circle on the infrared fairing, and the depth of the scratch is observed. The processing error between the infrared fairing and the fixture surface is reduced by a precision pitch table and a precision two-dimensional translation table, and the rotation center of the infrared fairing is accurately located.

Claims

1. An adjustable infrared fairing self-centering fixture, characterized in that: The invention comprises a fine adjustment mechanism (21), a housing (20), a transmission mechanism (22), and a clamping mechanism (23); the fine adjustment mechanism (21) is composed of a precision pitching platform (17) and a two-dimensional precision displacement platform (18); the housing (20) is composed of a base (16), a round cover (8), and a cover plate (7); the transmission mechanism is mainly composed of a worm wheel (10) and a worm (11), wherein one end of the worm (11) is provided with an internal thread connected to a fixed shaft (9), and the other end is embedded in a rotating shaft (13); the upper surface of the worm wheel (10) is connected to a track disc (4) by bolts; the clamping mechanism is composed of a roller (6), a roller shaft (5), a slide rail (3), and a clamping jaw (1), wherein the roller (6) is fixed to the track disc (4) by a limiting groove, and the clamping jaw (1) is connected to a slider (2) on the slide rail (3) by bolts.

2. The adjustable infrared fairing self-centering fixture according to claim 1 is characterized in that: The base (16) and the round cover (8) in the housing (20) are fixed by bolts, and the round cover (8), the cover plate (7) and the slide rail (3) are fixed by bolts.

3. The adjustable infrared dome self-centering fixture according to claim 1, characterized in that: The circular cover (8) in the housing (20) contains two linear channels inside, and the linear channels are used to fix the fixed shaft (9) and the rotating shaft (13).

4. The adjustable infrared fairing self-centering fixture according to claim 1, characterized in that: The upper surface of the cover plate (7) in the housing (20) includes a slide rail (3) track, and a boss is provided inside the cover plate (7) to fix and limit the slide rail grooves at both ends of the slide rail (3).

5. The adjustable infrared dome self-centering fixture according to claim 1, characterized in that: The transmission mechanism (22) further comprises a base bearing (15), a transmission shaft (19), and a linear bearing (12), wherein the base bearing (15) is connected to the base (16) by bolts, the transmission shaft (19) and the base bearing (15) are fixed by interference fit, and the linear bearing (12) is fixed in two linear channels of the round cover (8) by means of a top screw.

6. The adjustable infrared dome self-centering fixture according to claim 1, characterized in that: The track disc (4) contains four identical tracks for the movement of the roller (6).

7. The adjustable infrared dome self-centering fixture according to claim 1, characterized in that: One end of the roller shaft (5) is connected to the roller (6), and the other end is connected to the slider (2).

8. The adjustable infrared dome self-centering fixture according to claim 1, characterized in that: The clamping jaw (1) and the sliding block are fixed by bolts.

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