CN101718536A - Triangle diamond cutter angle high-precision automatic measuring system and measuring method - Google Patents
Triangle diamond cutter angle high-precision automatic measuring system and measuring method Download PDFInfo
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- CN101718536A CN101718536A CN200910312125A CN200910312125A CN101718536A CN 101718536 A CN101718536 A CN 101718536A CN 200910312125 A CN200910312125 A CN 200910312125A CN 200910312125 A CN200910312125 A CN 200910312125A CN 101718536 A CN101718536 A CN 101718536A
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Abstract
The invention belongs to the optical measurement and processing technical field, relating to an ultraprecise home position measuring device based on a flexible measuring head. The device comprises the flexible measuring head, an image transmitting fiber, a coupling mirror, a high-precision rotary table and an optical three-dimensional measuring system; wherein the flexible measuring head is arranged on the high-precision rotary table, and the center thereof is arranged on the axis of the rotation axis of the rotary table, and the image of the measured side acquired by the flexible measuring head is transmitted to the optical three-dimensional measuring system through the image transmitting fiber and the coupling mirror sequentially. The invention also provides an ultraprecise processing method implemented by utilizing the measuring device. The measuring device of the invention can lengthen and shorten the optical measuring system and can realize high curvature surface shape measurement and ultraprecise processing compensation.
Description
Technical field
The invention belongs to ultraprecise processing, Computer Vision Detection and image measurement technical field, relate to a kind of triangle diamond cutter angle high-precision automatic measuring system.
Background technology
Diamond cutter is the main tool of ultra precision cutting processing, has good wear resistance, hardness and heat conductivity, can carry out the single cutting to non-ferrous metal and realize the processing of nanoscale roughness surface.Triangle diamond cutter is the important tool of microstructures such as the little groove of processing, microprism, because microstructure leans on the shape of tool directly to duplicate on workpiece, so the degree of accuracy of cutter parameters is the important indicator that guarantees microstructure processing.For the very important parameter of triangle diamond cutter is exactly cutting-tool angle, at present, the method that takes measurement of an angle mainly contains non-contact optical methods such as universal tool-measuring microscope, super depth of field microscope, metering projector, but owing to do not splash the position relation of direction and measurement cutter, there is error in institute's angle measurement degree, thereby causes the different problems of the each result of measured value.In addition, existing method is mainly measured by artificial hand selection's cutter outline, can introduce the human factor error unavoidably.In view of the importance of cutter parameters and the shortcoming of measurement existence, a kind of diamond cutter angle high-precision automatic measuring system of necessary exploitation.
Summary of the invention
The present invention proposes a kind of diamond cutter angle high-precision automatic measuring system, can carry out the Automatic Optimal adjustment to measuring the tool position, determines best measurement position, thereby realizes the measurement of cutter parameters high precision.For this reason, the present invention adopts following technical scheme:
A kind of triangle diamond cutter angle high-precision automatic measuring system, comprise: base, be fixed on lifting table, image collecting device, capture card, controller and computing machine on the base, it is characterized in that, described base is provided with translation stage, position, angle platform and universal stage on translation stage, have been stacked successively, the turning axle of position, angle platform is axial and image collecting device optical axis perpendicular to lifting table, it is axial that the universal stage axle is parallel to lifting table, and, be fixed with the workholder that is used for clamping triangle diamond cutter knife rest to be measured on the universal stage with position, angle platform rotating shaft direct cross; Described image collecting device comprises by support and is fixed on backlight on the described lifting table, camera lens, video camera, frock clamp is between backlight and camera lens, the contour images of the triangle diamond cutter to be measured of capture card collection is admitted to computing machine, described controller respectively with computing machine, universal stage links to each other with position, angle platform, be used for according to the instruction control universal stage of computing machine transmission and moving of position, angle platform, described computing machine calculates according to contour images, control the best measurement position of the mobile search cutting-tool angle of universal stage and position, angle platform by controller, and calculate cutting-tool angle.
The present invention provides a kind of method that adopts above-mentioned automatic measurement system to measure triangle diamond cutter angle simultaneously, comprises the following steps:
(1) triangle diamond cutter to be measured and knife rest are fixed on the anchor clamps, make rake face towards camera lens, dorsad backlight;
(2) adjust translation stage and lifting table, make image collecting device can clearly collect the profile of triangle diamond cutter to be measured;
(3) utilize image collecting device to gather the contour images of cutter, and it is sent into computing machine;
(4) be optimized adjustment in such a way, determine the best measurement position of cutting-tool angle: at first, utilize computing machine universal stage to be rotated control by controller, the outline line of cutter both sides in the extract real-time contour images in rotation process, find the solution two included angle of straight line, adjust universal stage according to this angle, make cutter turn to the maximum measuring position of this angle; Utilize computing machine to rotate control again by controller diagonal bits platform, the outline line of cutter both sides in the extract real-time contour images in rotation process, find the solution two included angle of straight line, adjust position, angle platform according to this angle, make cutter turn to the minimum measuring position of this angle, thereby determine the best measurement position of cutting-tool angle;
(5) finding the solution two included angle of straight line that obtain in this best measurement position promptly is cutting-tool angle.
The present invention adopts the backlight of projection directional light from cutter dorsal part throw light, light is blocked by cutter, in video camera, become the black picture, and other zones are white, can highlight the cutter profile, can accurately obtain the cutter profile information in real time by the high-accurate outline extraction algorithm, thus the accurate Calculation cutting-tool angle.Control universal stage and position, angle platform trace movement, automatically judge the position relation of cutter and camera lens according to the variation tendency that records cutting-tool angle, be rotated the trace adjustment of platform and position, angle platform,, can seek the cutter best measurement position automatically owing to be adopted as automatically controlled platform fully.Therefore, the present invention has high precision, high-level efficiency and full automatic characteristics.
Description of drawings
Fig. 1 system construction drawing.
Fig. 2 cutter platform front view.
Fig. 3 diamond cutter profile diagram.
The motion control strategy of Fig. 4 universal stage.
The motion control strategy of position, Fig. 5 angle platform.
Description of reference numerals is as follows:
| 1 |
2 lifting tables | 3 supports | 4 |
| 5 jiaos of position platforms | 6 |
7 frock clamps | 8 backlight |
| 9 |
10 |
11 |
12 computing machines |
Embodiment
System architecture of the present invention as shown in Figure 1, backlight, enlarging lens and video camera are fixed on the same support, form the harvester one-piece construction and place on the lifting table, the optical axis of harvester is axial perpendicular to lifting table.The focal length and the enlargement ratio of enlarging lens are fixed, so its focusing distance and field depth are also determined.Place the translation stage that can trace moves on system's base, can carry out the bidirectional-movement of backlight to camera lens, kinematic axis is parallel to harvester, and axial perpendicular to lifting table.Stack position, angle platform and universal stage on translation stage successively, the turning axle of position, angle platform is axial and harvester optical axis perpendicular to lifting table, and it is axial that the universal stage axle is parallel to lifting table, and and position, angle platform rotating shaft direct cross.Fixed cutting tool anchor clamps and adamas knife rest on universal stage, and and rotating shaft coaxle.The initial position of translation stage need guarantee cutter in the focusing range of harvester, and focus level can be adjusted by the trace movement of translation stage.The height of universal stage, anchor clamps and knife rest guarantees within position, the angle platform turning radius (R), and guarantees that whole height skips over position, angle platform turning axle after installing diamond cutter, as shown in Figure 2.
After carrying out above assembling and adjusting, diamond cutter is installed on the knife rest, rake face is towards camera lens, backlight dorsad, trace is adjusted translation stage, collects triangle diamond cutter contour images clearly, as shown in Figure 3.Can accurately extract the outline line of cutter both sides by image pre-service and sub-pix extraction algorithm, the both sides cross-sectional data is carried out fitting a straight line respectively, find the solution the cutting-tool angle value of two included angle of straight line can obtain current location the time.
Cutter is optimized adjustment in such a way, determines best measurement position.At first, utilize computing machine to send instruction to controller, make it rotate control to universal stage, trace rotates universal stage, in rotation process, calculate cutting-tool angle in real time, determine current optimum position according to the Changing Pattern that records cutting-tool angle, concrete motion control strategy rotates to the maximum measuring position of cutting-tool angle as shown in Figure 4.Then, utilize computing machine to send instruction to controller, make its diagonal bits platform rotate control, trace angle of rotation position platform, in rotation process, calculate cutting-tool angle equally in real time, carry out turntable control, turn to the minimum measuring position of cutting-tool angle according to motion control strategy shown in Figure 5, be best measurement position, thereby obtain accurate cutting-tool angle value.
Claims (2)
1. triangle diamond cutter angle high-precision automatic measuring system, comprise: base, be fixed on lifting table, image collecting device, capture card, controller and computing machine on the base, it is characterized in that, described base is provided with translation stage, position, angle platform and universal stage on translation stage, have been stacked successively, the turning axle of position, angle platform is axial and image collecting device optical axis perpendicular to lifting table, it is axial that the universal stage axle is parallel to lifting table, and, be fixed with the workholder that is used for clamping triangle diamond cutter knife rest to be measured on the universal stage with position, angle platform rotating shaft direct cross; Described image collecting device comprises by support and is fixed on backlight on the described lifting table, camera lens, video camera, frock clamp is between backlight and camera lens, the contour images of the triangle diamond cutter to be measured of capture card collection is admitted to computing machine, described controller respectively with computing machine, universal stage links to each other with position, angle platform, be used for according to the instruction control universal stage of computing machine transmission and moving of position, angle platform, described computing machine calculates according to contour images, control the best measurement position of the mobile search cutting-tool angle of universal stage and position, angle platform by controller, and calculate cutting-tool angle.
2. a method that adopts the described automatic measurement system of claim 1 to measure triangle diamond cutter angle comprises the following steps: that (1) is fixed on triangle diamond cutter to be measured and knife rest on the anchor clamps, makes rake face towards camera lens, dorsad backlight;
(2) adjust translation stage and lifting table, make image collecting device can clearly collect the profile of triangle diamond cutter to be measured;
(3) utilize image collecting device to gather the contour images of cutter, and it is sent into computing machine;
(4) be optimized adjustment in such a way, determine the best measurement position of cutting-tool angle: at first, utilize computing machine universal stage to be rotated control by controller, the outline line of cutter both sides in the extract real-time contour images in rotation process, find the solution two included angle of straight line, adjust universal stage according to this angle, make cutter turn to the maximum measuring position of this angle; Utilize computing machine to rotate control again by controller diagonal bits platform, the outline line of cutter both sides in the extract real-time contour images in rotation process, find the solution two included angle of straight line, adjust position, angle platform according to this angle, make cutter turn to the minimum measuring position of this angle, thereby determine the best measurement position of cutting-tool angle;
(5) finding the solution two included angle of straight line that obtain in this best measurement position promptly is cutting-tool angle.
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Assignee: Tianjin MicroNano Manufacturing Tech Co., Ltd. Assignor: Tianjin University Contract record no.: 2011120000218 Denomination of invention: Triangle diamond cutter angle high-precision automatic measuring system and measuring method Granted publication date: 20110629 License type: Exclusive License Open date: 20100602 Record date: 20111020 |
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