A method for optical in-situ detection and adjustment of deflection angle of V-shaped diamond cutter

Abstract

The application discloses a kind of optical in-situ detection and adjustment method of V-shaped diamond cutter deflection angle, the method is positioned by CCD microscope under 100-200 times optical amplification cutter tip feature point, establishes reference line along X axis displacement, measures cutter deflection angle using image processing algorithm, and realizes cutter angle adjustment by adjusting screw, so that deflection angle is controlled within 0.5 °.The method has high detection precision, simple operation and good reproducibility, and can be applied to the deflection detection of special-shaped cutter.

Description

Technical Field

[0001] This invention belongs to the field of ultra-precision machining technology, specifically relating to an optical in-situ detection and adjustment method for the deflection angle of a V-shaped diamond tool, which is particularly suitable for tool alignment in the ultra-precision flying cut process of polymer microstructures. Background Technology

[0002] In the field of precision micromachining, V-grooves are widely used in machining features such as V-grooves and pyramidal microstructures. The tool deflection angle is a key parameter affecting the forming accuracy of microstructures; deviation directly impacts the symmetry and dimensional accuracy of the microstructure. In existing technologies, the deflection of rectangular tools can be detected using the STIL-CCD detection method. However, due to the unique geometry and optical reflection characteristics of V-grooves with their double-beveled surfaces, the detection methods used for rectangular tools cannot be applied, making V-grooves deflection detection a technical challenge. Therefore, there is an urgent need for an in-situ detection and adjustment method for the deflection angle of V-grooves. Summary of the Invention

[0003] The technical problem that this invention aims to solve is: how to perform high-precision in-situ deflection detection and adjustment on a V-shaped diamond tool with a vertices angle of 30° and a tip radius of less than 1 nm, so as to ensure the geometric accuracy of microstructures in ultra-precision flying cutting.

[0004] An optical in-situ detection and adjustment method for the deflection angle of a V-shaped diamond tool includes the following steps: S1: Tool mounting and microscope positioning A V-shaped diamond tool is mounted on the machine tool's fly cutter head. The V-shaped diamond tool has a 30° apex angle and a tip radius of less than 1 nm, and is used for ultra-precision fly cutting of polymer microstructures.

[0005] Adjust the position of the CCD microscope so that its field of view covers the tool tip area. At 10-50x optical magnification, accurately locate the tool tip feature points.

[0006] S2: Establishing a baseline and measuring angles A reference line is established by moving the CCD microscope or workpiece, displacing it 4-6 mm along the X-axis. This reference line is parallel to the X-axis of the machine tool coordinate system.

[0007] An image processing algorithm is used to measure the angle between a reference line and the two cutting edges of the tool, thus obtaining the tool deflection angle. The image processing algorithm includes edge detection, line fitting, and angle calculation. By identifying the straight line contours of the two cutting edges, the deviation between the angle between the two cutting edges and the reference line is calculated. The measurement accuracy is ±0.5°.

[0008] S3: Tool Angle Adjustment Based on the measured deflection angle, the tool mounting angle is adjusted using the adjusting screw on the fly cutter head. The adjustment accuracy of the adjusting screw is 0.1°-0.3°.

[0009] The tool deflection angle is controlled within 0.5° to complete tool centering.

[0010] S4: Processing Verification Using the adjusted cutting tool, V-grooves are machined with a cutting depth of 100-500 μm and a feed rate of 400-600 mm / min.

[0011] The included angle of the V-groove was detected by laser confocal microscopy to verify whether the tool deflection angle was controlled within 0.5°.

[0012] The present invention has the following beneficial effects: High detection accuracy: Utilizing CCD microscope optical magnification and image processing algorithms, the tool deflection angle measurement accuracy reaches ±0.5°; High adjustment precision: The tool deflection angle can be controlled within 0.5° by fine-tuning the adjustment screw; High machining accuracy: V-grooves are machined using adjusted cutting tools, and the deviation of the included angle from the design value is controlled within 0.5°; Easy to operate: In-situ inspection, no need to disassemble the tool, high inspection and adjustment efficiency; Wide applicability: This detection principle can be extended to the deflection detection of other irregularly shaped cutting tools. Attached Figure Description

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments: Figure 1 A schematic diagram illustrating the principle of adjusting the V-shaped cutter deflection for a CCD microscope; Figure 2 The inspection process and verification of V-shaped cutting tools. Detailed Implementation

[0014] The present invention will be further explained below with reference to specific implementation schemes, but it is not limited to the present invention. The structures, proportions, sizes, etc. shown in the accompanying drawings are only used to complement the content disclosed in the specification, so as to enable those skilled in the art to understand and read, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0015] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. The embodiments described herein are for illustrative purposes only and do not constitute any limitation on the scope of protection of this invention.

[0016] Example 1: Basic Testing and Adjustment A V-shaped diamond tool with a 30° apex angle and a tip radius of less than 1 nm is mounted on the fly tool disk. The CCD microscope is adjusted to 20x magnification to locate the feature points at the tool tip.

[0017] Move the CCD microscope 5 mm along the X-axis to establish a reference line parallel to the X-axis. Measure the angle between the reference line and the two cutting edges of the tool using an image processing algorithm (edge ​​detection + line fitting + angle calculation), obtaining a tool deflection angle of 2.3°.

[0018] Adjust the tool angle by adjusting the screw on the fly cutter head, and measure again. The deflection angle has dropped to 0.3°, which meets the requirement of less than 0.5°.

[0019] Example 2: Processing Verification Using the adjusted tool, V-grooves were machined with a cutting depth of 500 μm and a feed rate of 500 mm / min.

[0020] The results of laser confocal microscopy showed that the included angle of the V-groove was 29.59°, which was 0.41° off from the design value of 30°. The deviation was within 0.5°, indicating good symmetry of the groove.

[0021] Matters not covered in this invention are common knowledge.

[0022] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device, characterized in that: An optical in-situ detection and adjustment method for the deflection angle of a V-shaped diamond tool, wherein the V-shaped diamond tool has a vertices angle of 30° and a tip radius of less than 1 nm, and is used for ultra-precision flying cutting of polymer microstructures, characterized by comprising the following steps: S1: Install the V-shaped diamond tool on the machine tool fly tool head, adjust the position of the CCD microscope so that the microscope field of view covers the tool tip area, and accurately locate the tool tip feature point at 10-50 times optical magnification. S2: By moving the CCD microscope or workpiece, a reference line is established by displacing it 4-6 mm along the X-axis. The angle between the reference line and the two cutting edges of the tool is measured using an image processing algorithm to obtain the tool deflection angle. The measurement accuracy is ±0.5°. S3: Based on the measured deflection angle, adjust the tool installation angle using the adjusting screw on the fly tool disc to control the tool deflection angle within 0.5°, thus completing tool centering; S4: Using the adjusted tool, machine a V-groove with a cutting depth of 150-500 μm and a feed rate of 400-600 mm / min. Detect the V-groove angle using a laser confocal microscope to verify that the tool deflection angle is controlled within 0.5°.

2. The optical in-situ detection and adjustment method for the deflection angle of a V-shaped diamond tool according to claim 1, characterized in that, The optical magnification in step S1 is 10x.

3. The optical in-situ detection and adjustment method for the deflection angle of a V-shaped diamond tool according to claim 1, characterized in that, In step S2, the displacement along the X-axis is 5 mm, and the reference line is parallel to the X-axis of the machine tool coordinate system.

4. The optical in-situ detection and adjustment method for the deflection angle of a V-shaped diamond tool according to claim 1, characterized in that, The image processing algorithm in step S2 includes edge detection, line fitting, and angle calculation. By identifying the straight contours of the two cutting edges of the tool, the deviation between the included angle of the two cutting edges and the reference line is calculated.

5. The optical in-situ detection and adjustment method for the deflection angle of a V-shaped diamond tool according to claim 1, characterized in that, The adjustment accuracy of the adjusting screw in step S3 is 0.1°-0.3°.

6. The optical in-situ detection and adjustment method for the deflection angle of a V-shaped diamond tool according to claim 1, characterized in that, In step S4, the cutting depth is 500 μm, the feed rate is 500 mm / min, and the deviation of the V-groove included angle from the design value is controlled within 0.5°.

7. The optical in-situ detection and adjustment method for the deflection angle of a V-shaped diamond tool according to claim 1, characterized in that, Before step S1, the following steps are also included: using a standard angle template to calibrate the CCD microscope at multiple locations and verifying the measurement accuracy of the equipment through repeatability testing.

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