CN102809565A - A detection method for surface quality of lost foam cutting - Google Patents
A detection method for surface quality of lost foam cutting Download PDFInfo
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- CN102809565A CN102809565A CN2012103116833A CN201210311683A CN102809565A CN 102809565 A CN102809565 A CN 102809565A CN 2012103116833 A CN2012103116833 A CN 2012103116833A CN 201210311683 A CN201210311683 A CN 201210311683A CN 102809565 A CN102809565 A CN 102809565A
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- 239000006260 foam Substances 0.000 title claims abstract description 38
- 238000005520 cutting process Methods 0.000 title claims abstract description 27
- 238000001514 detection method Methods 0.000 title claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 11
- 239000002245 particle Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 238000005266 casting Methods 0.000 abstract description 5
- 238000004458 analytical method Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 3
- 238000010114 lost-foam casting Methods 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
一种消失模切削表面质量的检测方法，涉及铸造工艺，特别是采用消失模的铸造工艺技术领域中消失模表面加工质量的检测技术。本发明由精度高的CCD摄影机完成图像采集，将采集到的图像输入电脑，通过二次灰度处理，将灰度调整到一个特定的参数从而达到专用图像处理软件的分析要求，图像处理软件可以根据预先设计的灰度值自动识别凹陷颗粒的边缘像从而逐一计算出单个凹陷颗粒面积并计算出总的凹陷面积，最终得出总的凹陷面积同总切削面积的比值。本发明为消失模切削表面质量提供一种量化的标准，有利于消失模数控加工技术的提高，有助于改进消失模表面切削技术，本发明采用的工艺装备便于携带，操作方便。The invention discloses a method for detecting surface quality of lost foam cutting, which relates to casting technology, in particular to the detection technology of lost foam surface processing quality in the technical field of casting technology using lost foam. The present invention completes image collection by a high-precision CCD camera, and inputs the collected image into a computer, and through secondary grayscale processing, adjusts the grayscale to a specific parameter so as to meet the analysis requirements of special image processing software. The image processing software can According to the pre-designed gray value, the edge image of the sunken particles is automatically identified to calculate the area of each sunken grain and the total sunken area one by one, and finally the ratio of the total sunken area to the total cutting area is obtained. The invention provides a quantitative standard for the quality of the lost foam cutting surface, which is beneficial to the improvement of the lost foam numerical control machining technology and the improvement of the lost foam surface cutting technology. The process equipment adopted by the invention is easy to carry and easy to operate.
Description
技术领域 technical field
本发明涉及铸造工艺，特别是采用消失模的铸造工艺技术领域中消失模表面加工质量的检测技术。 The invention relates to a casting process, in particular to a detection technology for the surface processing quality of the lost foam in the technical field of the lost foam casting process.
背景技术 Background technique
消失模铸造技术被越来越多的用于高精密金属件的生产。消失模泡沫是由大量的小泡沫颗粒粘结而成，当针对消失模表面进行高速切削时会有一批分布不均匀泡沫颗粒被铣刀整个带出，从而形成颗粒凹陷。传统的消失模模具生产是先制造出同消失模模具相匹配的金属模具，再制造消失模，这在新产品的研发阶段不仅会消耗大量的时间和成本，也不利于产品的修改。 Lost foam casting technology is increasingly used in the production of high-precision metal parts. The lost foam foam is made of a large number of small foam particles bonded together. When high-speed cutting is performed on the lost foam surface, a batch of unevenly distributed foam particles will be taken out by the milling cutter, thereby forming particle depressions. The traditional lost foam mold production is to manufacture the metal mold that matches the lost foam mold first, and then manufacture the lost foam mold. This will not only consume a lot of time and cost in the research and development stage of new products, but also is not conducive to product modification.
近些年，国内外消失模模具生产厂家采用数控技术对消失模模具进行直接加工，这样不仅省掉了制造金属模具的成本和时间，同时也提高了消失模模具制造的精度。但是如何检测消失模切削表面质量，在国内外尚没有一种统一的方法。 In recent years, domestic and foreign lost foam mold manufacturers have used numerical control technology to directly process lost foam molds, which not only saves the cost and time of manufacturing metal molds, but also improves the precision of lost foam mold manufacturing. But how to detect the surface quality of lost foam cutting, there is no unified method at home and abroad.
消失模的制造材料是高聚苯乙烯，是一种质地相对金属材料软得多的不均匀的高分子材料，传统的粗糙度检测装置的探头无法在其表面工作。通过试验检测，影响消失模模具表面质量的主要因素是消失模切削加工的表面颗粒凹陷程度。目前，针对消失模切削表面质量的评估技术在国内仍是空白。 The manufacturing material of the lost foam is high polystyrene, which is an uneven polymer material whose texture is much softer than that of metal materials. The probe of the traditional roughness detection device cannot work on its surface. Through the test, the main factor affecting the surface quality of the lost foam mold is the degree of surface particle depression of the lost foam cutting process. At present, the evaluation technology for the surface quality of lost foam cutting is still blank in China.
发明内容 Contents of the invention
本发明目的是提出一种消失模切削表面质量的检测方法。 The purpose of the invention is to propose a detection method for the quality of the lost foam cutting surface.
本发明的方案步骤是： The program steps of the present invention are:
1）通过CCD摄影机采集完整的消失模切削表面的黑白图像； 1) Collect a complete black and white image of the lost foam cutting surface through a CCD camera;
2）将采集到的黑白图像通过计算机灰度处理系统对图像进行二次灰度处理； 2) Perform secondary grayscale processing on the collected black and white images through the computer grayscale processing system;
3）将处理好的图像输入图像处理软件，找到各个凹陷点的边缘像素并计算相应的单个凹陷点的凹陷面积，计算出所有凹陷点的总体面积与完整的消失模切削表面积的比值。 3) Input the processed image into the image processing software, find the edge pixels of each sunken point and calculate the sunken area of the corresponding single sunken point, and calculate the ratio of the total area of all sunken points to the complete lost foam cutting surface area.
本发明由精度高的CCD摄影机完成图像采集，将采集到的图像输入电脑，通过二次灰度处理，将灰度调整到一个特定的参数从而达到专用图像处理软件的分析要求，图像处理软件可以根据预先设计的灰度值自动识别凹陷颗粒的边缘像从而逐一计算出单个凹陷颗粒面积并计算出总的凹陷面积，最终得出总的凹陷面积同总切削面积的比值。 The present invention completes image collection by a high-precision CCD camera, and inputs the collected image into a computer, and through secondary grayscale processing, adjusts the grayscale to a specific parameter so as to meet the analysis requirements of special image processing software. The image processing software can According to the pre-designed gray value, the edge image of the sunken particles is automatically identified to calculate the area of each sunken grain and the total sunken area one by one, and finally the ratio of the total sunken area to the total cutting area is obtained.
本发明为消失模切削表面质量提供一种量化的标准，有利于消失模数控加工技术的提高，有助于改进消失模表面切削技术，另外，本发明只需现场携带CCD摄影机即可，采用工艺装备简单，操作方便、便于携带。 The present invention provides a quantitative standard for the quality of the lost foam cutting surface, which is beneficial to the improvement of the lost foam numerical control machining technology and helps to improve the lost foam surface cutting technology. In addition, the present invention only needs to carry a CCD camera on site. The equipment is simple, easy to operate and easy to carry.
控制CCD摄影机的摄像头与切削表面的距离为20mm。取得的颗粒凹陷处的图像跟平整表面的图像灰度是一样的。 The distance between the camera controlling the CCD camera and the cutting surface is 20mm. The obtained image of the particle depression has the same gray scale as the image of the flat surface.
具体实施方式 Detailed ways
取经过表面切削处理的消失模，对其中一个表面进行质量检测： Take the lost foam that has undergone surface cutting treatment, and perform quality inspection on one of the surfaces:
1、控制CCD摄影机的摄像头与切削表面的距离为20mm，通过CCD摄影机采集该表面完整的消失模切削表现凹陷的黑白图像。 1. The distance between the camera of the CCD camera and the cutting surface is 20mm, and the complete lost foam cutting of the surface is collected by the CCD camera to show the black and white image of the depression.
2、将采集到的黑白图像输入计算机，通过计算机，将图像进行二次灰度处理，使其满足图像处理软件的处理要求。 2. Input the collected black-and-white image into the computer, and through the computer, the image is processed twice to make it meet the processing requirements of the image processing software.
3、将处理好的图像输入图像处理软件，软件会自动找到单个凹陷点的边缘像素并计算出单个凹陷点的凹陷面积，对图像进行重复处理，从而计算凹陷点的总体面积，最后计算出总的凹陷面积同总的切削面积的比值。 3. Input the processed image into the image processing software. The software will automatically find the edge pixels of a single sunken point and calculate the sunken area of a single sunken point. Repeat the image processing to calculate the total area of the sunken point, and finally calculate the total area of the sunken point. The ratio of the concave area to the total cutting area.
4、判断：当上述取得的比值低于设定参数值时，则消失模在该表面的切削质量满足铸造要求；当上述取得的比值高出设定参数值时，则消失模在该表面的切削质量不符合铸造要求。 4. Judgment: When the above obtained ratio is lower than the set parameter value, the cutting quality of the lost foam on the surface meets the casting requirements; when the above obtained ratio is higher than the set parameter value, the lost foam on the surface Cutting quality does not meet casting requirements.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109359386A (en) * | 2018-10-18 | 2019-02-19 | 昆山鹏帝辉金属有限公司 | Calculation method, method of adjustment and the best setting method of robot grinding efficiency |
| CN120064101A (en) * | 2025-02-25 | 2025-05-30 | 湖北金阳石新型耐磨材料科技有限公司 | Detection device and detection method for quality of cutting surface of lost foam |
Citations (3)
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| US6580813B1 (en) * | 1998-08-10 | 2003-06-17 | W. Schlafhorst Ag & Co. | Method and apparatus for detecting residual yarn on spinning cop tubes |
| EP1400922A1 (en) * | 2002-09-20 | 2004-03-24 | Nitto Denko Corporation | Print inspection method and apparatus |
| CN102621158A (en) * | 2011-07-15 | 2012-08-01 | 苏州谷夫道自动化科技有限公司 | Automatic detection device and method of unqualified magnet ring |
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2012
- 2012-08-29 CN CN2012103116833A patent/CN102809565A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6580813B1 (en) * | 1998-08-10 | 2003-06-17 | W. Schlafhorst Ag & Co. | Method and apparatus for detecting residual yarn on spinning cop tubes |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109359386A (en) * | 2018-10-18 | 2019-02-19 | 昆山鹏帝辉金属有限公司 | Calculation method, method of adjustment and the best setting method of robot grinding efficiency |
| CN109359386B (en) * | 2018-10-18 | 2023-04-07 | 昆山鹏帝辉金属有限公司 | Calculation method, adjustment method and optimal setting method for polishing efficiency of robot |
| CN120064101A (en) * | 2025-02-25 | 2025-05-30 | 湖北金阳石新型耐磨材料科技有限公司 | Detection device and detection method for quality of cutting surface of lost foam |
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Application publication date: 20121205 |