Working method of adjustable infrared fairing self-centering clamp

Abstract

The invention provides a working method of an adjustable infrared fairing self-centering clamp. The adjustable infrared fairing self-centering clamp comprises a fine adjustment mechanism, a shell, a transmission mechanism and a clamping mechanism. The fine adjustment mechanism is located at the lowermost end of the clamp and connected with the machining platform. The fine adjustment mechanism comprises a horizontal precision displacement table and a precision pitching table; the transmission mechanism comprises a worm gear, a worm, a base bearing, a transmission shaft, a linear bearing and a fixed shaft; the clamping mechanism comprises a roller, a roller shaft, a sliding rail and a clamping jaw; the working method comprises a leveling method, a focusing method and a processing method.

Description

Technical Field

[0001] The invention belongs to the field of ultrafast laser precision processing and micro-nano manufacturing, and in particular relates to a working method of an adjustable infrared fairing self-centering fixture. Background Art

[0002] In the field of high-precision femtosecond laser processing, precise positioning and fixation of workpieces are the key to ensuring processing quality. Traditional fixtures often lack flexibility and precise fine-tuning capabilities, which makes it difficult to achieve precise positioning of complex shapes or workpieces of different sizes during processing, which not only affects processing accuracy but also reduces production efficiency. In addition, due to the high-energy characteristics of femtosecond laser processing, even a slight displacement of the workpiece during processing may lead to processing defects, such as stress concentration, spot deviation, etc., which are difficult to be effectively solved in traditional fixtures. In order to solve this problem, a working method of an adjustable infrared dome self-centering fixture is proposed. The method realizes precise positioning and fixation of the workpiece by integrating a fine-tuning mechanism, a transmission mechanism and a clamping mechanism. The horizontal fine-tuning and pitch fine-tuning functions of the fine-tuning mechanism enable the fixture to adapt to infrared domes of different sizes, ensuring that the laser can be accurately focused on the workpiece surface. The design of the transmission mechanism allows the jaws to rotate synchronously, evenly clamp the workpiece, and reduce stress concentration. In addition, the working method of the fixture also includes three key steps: leveling, focusing and processing. The precise execution of these steps is essential to achieve high-quality femtosecond laser processing. Summary of the invention

[0003] In view of this, the present invention aims to propose a working method of an adjustable infrared dome self-centering fixture suitable for fast laser precision machining and micro-nano machining.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A working method of an adjustable infrared dome self-centering fixture, characterized in that: the adjustable infrared dome self-centering fixture comprises a fine-tuning mechanism, a shell, a transmission mechanism, and a clamping mechanism; wherein the fine-tuning mechanism is located at the lower end of the fixture and is connected to a processing platform; the fine-tuning mechanism comprises a horizontal precision displacement table and a precision pitch table; the transmission mechanism comprises a worm gear, a worm, a base bearing, a transmission shaft, a linear bearing, and a fixed shaft; the clamping mechanism comprises a roller, a roller shaft, a slide rail, and a clamping claw; the working method comprises: a leveling method, a focusing method, and a processing method.

[0006] Furthermore, the fine-tuning mechanism is connected to the working platform via an adapter plate, and the thickness of the adapter plate is determined according to the sizes of different infrared fairings to ensure that the laser can be focused on the surface of the infrared fairing.

[0007] Furthermore, the outer shell has a knob connected to the worm, and the knob is rotated to control the worm to drive the worm wheel to rotate so that the clamping claws rotate synchronously to clamp the infrared fairing.

[0008] Furthermore, the transmission mechanism contains eight clamping claws which can clamp the infrared fairing inside and outside at the same time, thereby reducing stress concentration.

[0009] Furthermore, the leveling method in the working method includes center position adjustment and pitch adjustment.

[0010] Furthermore, for the center position adjustment, a photosensitive card is placed at the center of the fixture, and the fixture is rotated to observe whether the light spot deviates. If the light spot deviates, the horizontal precision translation stage is adjusted to ensure that the rotation center of the fixture coincides with the rotation center of the working platform.

[0011] Furthermore, for the pitch adjustment, the processing sample is clamped at the center of the fixture, the fixture is rotated to observe the processing brightness, and the precision pitch table is adjusted to ensure consistent brightness.

[0012] Furthermore, the focusing method continuously lowers the height of the objective lens. When a bright spot just appears on the surface of the sample and the surface of the sample is no longer bright when the objective lens is raised by 0.002 mm, the focusing is successful.

[0013] Furthermore, the processing method is to process the entire surface continuously through equidistant spirals.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] (1) This working method has high-precision positioning: Through the horizontal fine-tuning and pitch fine-tuning of the fine-tuning mechanism, the fixture can achieve high-precision positioning of the workpiece, ensuring the accuracy and repeatability of the laser processing process;

[0016] (2) The working method is easy to operate. The knob in the housing is connected to the worm. By rotating the knob, the worm can be controlled to drive the worm wheel to rotate, thereby realizing synchronous rotation and clamping of the clamping jaws, simplifying the operation process;

[0017] (3) This working method has precise focusing. By precisely controlling the height of the objective lens, the focus is successfully achieved when a bright spot appears on the surface of the sample and the surface of the sample is no longer bright after the objective lens is raised by 0.002 mm, thus ensuring the accuracy and consistency of laser processing.

[0018] (4) This working method can achieve uninterrupted processing of the entire surface through the equidistant spiral processing method. This continuous processing method improves processing efficiency and shortens the production cycle;

[0019] (5) The design and implementation of the entire working method are aimed at improving processing quality and reducing processing defects, which is crucial to improving the market competitiveness of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a schematic diagram of the practical application of the working method of the adjustable infrared dome self-centering fixture described in the present invention.

[0021] Figure 2 The present invention is a schematic top view of the interior of the adjustable infrared dome self-centering fixture of the present invention.

[0022] Figure 3 The present invention is a schematic diagram of the internal structure of the working method of the adjustable infrared fairing self-centering fixture.

[0023] Figure 4 The present invention is a top view structural schematic diagram of the working method of the adjustable infrared fairing self-centering fixture.

[0024] Figure 5 The present invention is a schematic diagram of a working method of the adjustable infrared dome self-centering fixture placed on a working platform.

[0025] Figure 6 It is a two-dimensional schematic diagram of equidistant spiral lines of the working method of the adjustable infrared fairing self-centering fixture described in the present invention.

[0026] Figure 7 It is a three-dimensional schematic diagram of equidistant spiral lines of the working method of the adjustable infrared fairing self-centering fixture described in the present invention.

[0027] In the figure; 1-fine-tuning mechanism, 2-housing, 3-transmission structure, 4-clamping mechanism, 5-objective lens, 6-laser, 7-infrared fairing, 8-horizontal precision displacement stage, 9-precision pitch stage, 10-worm gear, 11-worm, 12-base bearing, 13-transmission shaft, 14-linear bearing, 15-fixed shaft, 16-roller, 17-roller shaft, 18-slide rail, 19-clamp, 20-photosensitive card, 21-adapter plate, 22-working platform, 23-knob. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0029] A working method of an adjustable infrared dome self-centering fixture, characterized in that: the adjustable infrared dome self-centering fixture comprises a fine-tuning mechanism 5, a shell 1, a transmission mechanism, and a clamping mechanism; wherein the fine-tuning mechanism is located at the lower end of the fixture and is connected to a processing platform; the fine-tuning mechanism comprises a horizontal fine-tuning 8 and a pitch fine-tuning 9; the transmission mechanism comprises a worm gear 10, a worm 11, a base bearing 12, a transmission shaft 13, a linear bearing 14, and a fixed shaft 15; the clamping mechanism comprises a roller 16, a roller shaft 17, a slide rail 18, and a clamping claw 19; the working method comprises: a leveling method, a focusing method, and a processing method.

[0030] The fine-tuning mechanism is connected to the working platform 22 via an adapter plate 21. The thickness of the adapter plate is determined according to the size of different infrared fairings to ensure that the laser can be focused on the surface of the infrared fairing.

[0031] The outer shell has a knob 23 connected to the worm 11 . The knob 23 is rotated to control the worm 11 to drive the worm wheel 10 to rotate so that the clamping claw 19 rotates synchronously to clamp the infrared fairing 8 .

[0032] like Figure 1 As shown: the infrared fairing is fixed to the upper surface of the shell by the clamps, and the laser is focused on the surface of the infrared fairing through the objective lens.

[0033] The leveling method in the working method includes center position adjustment and pitch adjustment.

[0034] The center position adjustment is to place the photosensitive card 20 at the center of the fixture, rotate the fixture to observe whether the light spot deviates, and if the light spot deviates, adjust the horizontal fine adjustment to ensure that the rotation center of the fixture coincides with the rotation center of the working platform 23.

[0035] like Figure 4 As shown: the photosensitive card is fixed to the center of the upper surface of the fixture housing by threads. The laser hits the photosensitive card and a circular spot appears. Rotate the fixture to observe the position change of the spot. Rotate the knob of the horizontal translation stage to ensure that the spot remains fixed when the fixture rotates.

[0036] The pitch adjustment is to hold the processed sample at the center of the fixture, rotate the fixture to observe the processing brightness, and adjust the precision pitch table to ensure consistent brightness.

[0037] like Figure 2 As shown: The knobs at different positions of the precision pitch stage can be rotated to keep the processing brightness consistent.

[0038] The focusing method continuously lowers the height of the objective lens. When a bright spot just appears on the surface of the sample and the surface of the sample is no longer bright when the objective lens is raised by 0.002 mm, the focusing is successful.

[0039] The processing method is to process the entire surface continuously through equidistant spirals.

[0040] like Figure 5 As shown: All the points in the figure are the infrared fairing processing trajectory map.

[0041] The working method and processing process of the adjustable infrared fairing self-centering fixture are as follows:

[0042] (1) First, place the infrared fairing on the upper surface of the shell, turn the knob to control the simultaneous movement of the clamps, and clamp the infrared fairing.

[0043] (2) Next, turn on the femtosecond laser on the photosensitive card, rotate the fixture to observe the position of the light spot on the photosensitive card, and use horizontal fine adjustment to adjust the center of the fixture to coincide with the center of the work platform by observing the position of the light spot.

[0044] (3) Finally, the femtosecond laser is focused on the surface of the infrared dome, the fixture is rotated to observe the processing brightness, and the processing brightness is kept consistent by adjusting the pitch and elevation.

Claims

1. A working method of an adjustable infrared fairing self-centering fixture, characterized in that: The adjustable infrared dome self-centering fixture comprises a fine-tuning mechanism (1), a housing (2), a transmission mechanism (3), and a clamping mechanism (4); wherein the fine-tuning mechanism (1) is located at the bottom of the fixture and is connected to a processing platform (22); the fine-tuning mechanism (1) comprises a horizontal precision displacement platform (8) and a precision pitch platform (9); the transmission mechanism comprises a worm gear (10), a worm (11), a base bearing (12), a transmission shaft (13), a linear bearing (14), and a fixed shaft (15); the clamping mechanism comprises a roller (16), a roller shaft (17), a slide rail (18), and a clamping claw (19); the working method comprises: a leveling method, a focusing method, and a processing method; 2. The working method of the adjustable infrared dome self-centering fixture according to claim 1 is characterized in that: The fine-tuning mechanism (1) is connected to the working platform (22) via an adapter plate (21), and the thickness of the adapter plate (21) is determined according to the size of different infrared fairings (7) to ensure that the laser can be focused on the surface of the infrared fairing (7).

3. The working method of the adjustable infrared dome self-centering fixture according to claim 1 is characterized in that: The housing (2) in the housing has a knob (23) connected to the worm (11). The knob (23) is rotated to control the worm (11) to drive the worm wheel (10) to rotate so that the clamping claw (19) rotates synchronously to clamp the infrared fairing (7).

4. The working method of the adjustable infrared dome self-centering fixture according to claim 1 is characterized in that: The transmission mechanism contains eight clamping claws (19) which can clamp the infrared fairing (7) inside and outside at the same time, thereby reducing stress concentration.

5. The working method of the adjustable infrared dome self-centering fixture according to claim 1 is characterized in that: The leveling method in the working method includes center position adjustment and pitch adjustment.

6. The working method of the adjustable infrared dome self-centering fixture according to claim 5 is characterized in that: The center position adjustment is to place a photosensitive card (20) at the center of the fixture, rotate the fixture to observe whether the light spot deviates, and if the light spot deviates, adjust the horizontal precision displacement stage (9) to ensure that the rotation center of the fixture coincides with the rotation center of the working platform.

7. The working method of the adjustable infrared dome self-centering fixture according to claim 5 is characterized in that: The pitch adjustment is to hold the processed sample at the center of the fixture, rotate the fixture to observe the processing brightness, and adjust the precision pitch table (9) to ensure consistent brightness.

8. The working method of the adjustable infrared dome self-centering fixture according to claim 1, characterized in that: The focusing method continuously lowers the height of the objective lens (5), and when a bright spot just appears on the surface of the sample and the surface of the sample is no longer bright after the objective lens (5) is raised by 0.002 mm, focusing is successful.

9. The working method of the adjustable infrared dome self-centering fixture according to claim 1, characterized in that: The processing method is to process the entire surface continuously through equidistant spirals.

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