CN102435607B - Image-based measuring device for normal contact stiffness of assembled jointing surface of large-size machine tool - Google Patents
Image-based measuring device for normal contact stiffness of assembled jointing surface of large-size machine tool Download PDFInfo
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- CN102435607B CN102435607B CN201110430286.3A CN201110430286A CN102435607B CN 102435607 B CN102435607 B CN 102435607B CN 201110430286 A CN201110430286 A CN 201110430286A CN 102435607 B CN102435607 B CN 102435607B
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Abstract
The invention provides an image-based measuring device for normal contact stiffness of an assembled jointing surface of a large-size machine tool. The image-based measuring device comprises a datum marking mechanism, wherein the datum marking mechanism comprises a magnetic base, a precision ruler, a vernier, a marking head and a spring mechanism; the precision ruler is fixed on the magnetic base; the vernier is in sliding match with the precision ruler; the marking head is vertically arranged on the vernier; a three-claw spring mechanism which is connected to the marking head is mounted in the vernier; the image-based measuring device for the normal contact stiffness of the assembled jointing surface of the large-size machine tool further comprises a measuring collecting device; the measuring collecting device comprises a camera, a connecting line, a computer and a tripod; and the camera is fixed on the tripod and is connected to the computer through the connecting line. The image-based measuring device provided by the invention is used for respectively marking an interface full-elastic contact layer and a plastic influence-containing contact layer and loading strain variables of different contact layers obtained by utilizing image processing in turn, thereby calculating and obtaining the normal contact stiffness of the jointing surface. Such a measuring system is convenient and high-speed, is portable and is wide in application scope.
Description
Technical field
The present invention be more particularly directed to a kind of Machine Tool Joint Surface normal contact stiffness measuring system, belong to heavy duty machine tools alignment measurement technical field.
Background technology
Along with the high speed development of high precision large-sized machine tool mechanical equipment, some problems of in the past being ignored by people start to become key.Wherein, in device structure, a large amount of surface of contact that exist have blocked the overall continuity of equipment, and have shown very high non-linearly, directly affect the power performance of main equipment.
Be fitted to each other the contact stiffness of face and the surface quality of faying face and contact stress, contact condition has close relationship, if can provide the related law of these influence factors, will bring greatly benefit for the measurement of contact stiffness.The measurement of contact stiffness in the past only rests on the experimental study stage, has provided some measurement mechanisms, cannot in engineering reality, apply.Even if be applied in reality, due to the geometrical property of contact interface and the restriction of installation site, the contact stiffness that makes these measuring methods cannot be applied to lathe fitting surface is measured.
Summary of the invention
The object of this invention is to provide a kind of heavy duty machine tools based on image and be fitted to each other face normal contact stiffness measurement mechanism, to solve the problems of the technologies described above.
To achieve these goals, the present invention adopts following technical scheme: a kind of heavy duty machine tools based on image are fitted to each other face normal contact stiffness measurement mechanism, it is characterized in that drawing marking machine structure by benchmark forms with measurement harvester;
Benchmark is drawn marking machine structure and is comprised magnetic base (10), precision scale (20), vernier (40), draws header (50) and spring device (30); It is upper that precision scale (20) is fixed on magnetic base (10), and vernier (40) is slidably matched with scale (20); Draw header (50) and be arranged vertically in vernier (40) above, in vernier (40), be provided with and connect the three-jaw spring device (30) of drawing header (50);
Measure harvester and comprise camera (2), connecting line (5), computing machine (6) and tripod (4); It is upper that industrial camera (2) is fixed on tripod (4), and industrial camera (2) is connected with computing machine (6) by connecting line (5);
The three-jaw that benchmark is drawn in marking machine structure is drawn header (50), the elastic layer of the contact layer of indicia band plastic yield and perfect elasticity distortion respectively, camera (2) collection of measuring in harvester loads the view data that front and back three-jaw is drawn header (50) gauge point, send computing machine (6) to, computing machine (6) combining image technology is obtained the front and back relative shift of gauge point, obtain the dependent variable of corresponding elastic layer and contact layer or claim marker pip displacement, and then demonstrating contact interface normal contact stiffness by computing machine (6).
The header (50) of drawing that benchmark is drawn in marking machine structure is drawn header for three-pawl type; Draw second header (52) of header (50) in the middle of comprising and be positioned at the second header upside the first header (51), the 3rd header (53) of downside.
The distance that benchmark is drawn between distance and the second header (52) and the 3rd header (53) between the first header (51) and the second header (52) in marking machine structure is all predefined according to measurement range.
Measure on harvester camera (2) microspur zoom lens (1) is installed.
Basic thought of the present invention utilizes three-jaw to draw header 50, the elastic layer of the contact layer of indicia band plastic yield and perfect elasticity distortion respectively, utilize high resolution industrial CCD camera 2 to gather the view data of gauge point under load condition, combining image technology is obtained the relative shift of gauge point, to obtain the dependent variable (marker pip displacement) of corresponding elastic layer and contact layer, and then obtain contact interface normal contact stiffness.
Compared with prior art, the present invention has the following advantages: the present invention is by mark interface perfect elasticity contact layer respectively and comprise plasticity and affect contact layer, before and after loading, utilize image processing to obtain different contact layer dependent variables, and then calculate faying face normal contact stiffness, for instructing grinding machine structure design and assembly technology to improve; Reality is tested and is shown, the present invention is not only applicable to experimental study, is also applicable to the measurement check demand of actual condition completely.The Machine Tool Joint Surface normal contact stiffness measurement mechanism that the present invention is based on image is convenient and swift, possesses transportability, applied widely, and the normal contact stiffness that can really be widely used in engineering reality is measured.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the benchmark of measuring system of the present invention is drawn marking machine structure.
Fig. 2 is the schematic diagram that the present invention measures acquisition system.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Shown in Fig. 1 and Fig. 2, the heavy duty machine tools that the present invention is based on image are fitted to each other face normal contact stiffness measurement mechanism, comprise benchmark draw marking machine structure and measure harvester.
Heavy duty machine tools based on image are fitted to each other a face normal contact stiffness measurement mechanism, comprise that benchmark draws marking machine structure; Described benchmark is drawn marking machine structure and is comprised magnetic base, precision scale, vernier, draws header and spring device; Precision scale is fixed on magnetic base, and vernier and scale are slidably matched; Draw header and be arranged vertically on vernier, in vernier, be provided with and connect the three-jaw spring device of drawing header; The described heavy duty machine tools based on image are fitted to each other face normal contact stiffness measurement mechanism and also comprise measurement harvester; Described measurement harvester comprises camera, connecting line, computing machine and tripod; Camera is fixed on tripod, and camera connects computing machine by connecting line.
Drawing header is that three-pawl type is drawn header; Draw the first header, the 3rd header that header comprises the second middle header and is positioned at the second header both sides.
Distance between distance between the first header and the second header and the 3rd header and the second header is all in advance given according to measurement range.
Microspur zoom lens is installed on camera.
Benchmark is drawn marking machine structure and is comprised magnetic base 10, precision scale 20, vernier 40, draws header 50 and three-jaw spring device 30.Precision scale 20 is fixed on magnetic base 10, and vernier 40 is slidably matched with scale 20; Drawing header 50 adopts three-pawl type (to guarantee gauge point spacing strict conformance, accurately and reliably), be arranged vertically on vernier 40, with vernier 40 motions; In vernier 40, be provided with and connect the three-jaw spring device 30 of drawing header 50.
Concrete operations: it is fixing by magnet base 10 absorption that benchmark is drawn marking machine structure, guarantee that three-jaw draws 50 3 lines of header perpendicular to surface of contact to be measured; Slip vernier 40 arrives surface of contact position, interface as three-jaw initial position, and up-down adjustment vernier makes surface of contact position be positioned at three-jaw ideal mark scope, as measuring position; Press three-jaw spring device 30, make three-jaw draw header 50 contact measured faces, on being tested surface, leave the marking, complete the different contact layer marks in interface.
Measure industrial camera 2, zoom lens 1, connecting line 5, computing machine 6, tripod 4 and object distance fine setting supporting plate 3 that harvester comprises 1,000,000 class resolution ratios.Concrete fitting operation, assembling camera 2 and camera lens 1, fixed camera 2, on object distance fine setting supporting plate 3, connects tripod 4 and object distance fine setting supporting plate 3, and tripod 4 is placed in the steady ground without focus or platform; Connect camera 2 and computing machine 6 by connecting line 5.
Three-jaw of the present invention draws second header 52 of header 50 in the middle of comprising, be positioned at the first header 51 of the second header upside and be positioned at the 3rd header 53 of the second header downside; Distance between distance between the first header 51 and the second header 52 and the second header 52 and the 3rd header 53 is all in advance given according to measurement range.Spacing in the middle of the present invention is preferred between the second header 52 and the first header 51 is 3-5mm, and the spacing between middle the second header 52 and the 3rd header 53 is 5-8mm; When line, middle header 52 and the first header 51 apart from its close together are positioned at upper strata contact 8 regions of surface of contact 9 upsides, are positioned at lower floor's contact 10 regions of surface of contact 9 downsides apart from middle header 52 the 3rd header 53 far away; What three-jaw of the present invention was drawn header 50 marks is harmless black round dot 7.
Claims (1)
1. the heavy duty machine tools based on image are fitted to each other a face normal contact stiffness measurement mechanism, it is characterized in that drawing marking machine structure by benchmark forms with measurement harvester;
Benchmark is drawn marking machine structure and is comprised magnetic base (10), precision scale (20), vernier (40), draws header (50) and three-jaw spring device (30); It is upper that precision scale (20) is fixed on magnetic base (10), and vernier (40) is slidably matched with precision scale (20); Draw header (50) and be arranged vertically in vernier (40) above, in vernier (40), be provided with and connect the three-jaw spring device (30) of drawing header (50);
Measure harvester and comprise camera (2), connecting line (5), computing machine (6) and tripod (4); It is upper that camera (2) is fixed on tripod (4), and camera (2) is connected with computing machine (6) by connecting line (5);
Benchmark is drawn stroke header (50) in marking machine structure, the elastic layer of the contact layer of indicia band plastic yield and perfect elasticity distortion respectively, the camera (2) of measuring in harvester gathers the view data of drawing header (50) gauge point before and after loading, send computing machine (6) to, computing machine (6) combining image technology is obtained the front and back relative shift of gauge point, obtain the dependent variable of corresponding elastic layer and contact layer or be called marker pip displacement, and then demonstrating contact interface normal contact stiffness by computing machine (6).
2. the heavy duty machine tools based on image according to claim 1 are fitted to each other face normal contact stiffness measurement mechanism, it is characterized in that the header (50) of drawing that benchmark is drawn in marking machine structure draws header for three-pawl type; Drawing header (50) comprises middle the second header (52) and is positioned at first header (51) of the second header upside, the 3rd header (53) of downside.
3. the heavy duty machine tools based on image according to claim 2 are fitted to each other face normal contact stiffness measurement mechanism, it is characterized in that the distance of drawing between the first header (51) in header (50) and distance and the second header (52) and the 3rd header (53) between the second header (52) is all predefined according to measurement range.
4. the heavy duty machine tools based on image according to claim 1 are fitted to each other face normal contact stiffness measurement mechanism, it is characterized in that measuring on the camera (2) in harvester microspur zoom lens (1) is installed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110430286.3A CN102435607B (en) | 2011-12-20 | 2011-12-20 | Image-based measuring device for normal contact stiffness of assembled jointing surface of large-size machine tool |
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| CN201110430286.3A CN102435607B (en) | 2011-12-20 | 2011-12-20 | Image-based measuring device for normal contact stiffness of assembled jointing surface of large-size machine tool |
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| CN102435607A CN102435607A (en) | 2012-05-02 |
| CN102435607B true CN102435607B (en) | 2014-05-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607937B (en) * | 2012-03-13 | 2014-01-29 | 西安交通大学 | Contact interface normal stiffness scanning type measuring system based on computer vision |
| CN103149002B (en) * | 2013-02-05 | 2015-05-13 | 山东大学 | Testing device and method of normal dynamic characteristic parameter of combination face |
| CN110752015A (en) * | 2018-07-24 | 2020-02-04 | 由昉信息科技（上海）有限公司 | Intelligent classification and marking system and method applied to medical field |
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| CN1308228A (en) * | 2001-03-22 | 2001-08-15 | 上海交通大学 | Elastic element rigidity testing instrument |
| RU2267262C2 (en) * | 2004-02-24 | 2006-01-10 | НПФ "Нуклеус" | Instrument for determining rigidity of teat liner |
| CN201622212U (en) * | 2010-03-18 | 2010-11-03 | 何若泉 | Portable escalator skirt board rigidity detection device |
| CN102175534A (en) * | 2011-01-21 | 2011-09-07 | 上海理工大学 | Test device for stiffness of flexible spring |
| CN202421075U (en) * | 2011-12-20 | 2012-09-05 | 沈机集团昆明机床股份有限公司 | Image-based normal contact stiffness measuring device for assembly joint surfaces of large machine tools |
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2011
- 2011-12-20 CN CN201110430286.3A patent/CN102435607B/en active Active
Patent Citations (5)
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| CN1308228A (en) * | 2001-03-22 | 2001-08-15 | 上海交通大学 | Elastic element rigidity testing instrument |
| RU2267262C2 (en) * | 2004-02-24 | 2006-01-10 | НПФ "Нуклеус" | Instrument for determining rigidity of teat liner |
| CN201622212U (en) * | 2010-03-18 | 2010-11-03 | 何若泉 | Portable escalator skirt board rigidity detection device |
| CN102175534A (en) * | 2011-01-21 | 2011-09-07 | 上海理工大学 | Test device for stiffness of flexible spring |
| CN202421075U (en) * | 2011-12-20 | 2012-09-05 | 沈机集团昆明机床股份有限公司 | Image-based normal contact stiffness measuring device for assembly joint surfaces of large machine tools |
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| 测试单向复合材料刚度特性实验的简化方案;赵建华;《固体力学学报》;19820831(第3期);420-424 * |
| 赵建华.测试单向复合材料刚度特性实验的简化方案.《固体力学学报》.1982,(第3期),420-424. |
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Address after: 650203, 23 Dam Road, Kunming, Yunnan, Beijiao Patentee after: General technology Group Kunming Machine Tool Co.,Ltd. Address before: 650203, 23 Dam Road, Kunming, Yunnan, Beijiao Patentee before: SHENJI GROUP KUNMING MACHINE TOOL Co.,Ltd. |