基于ANSYS的燃气灶具钢化玻璃面板结构尺寸的敏感性分析

发布时间：2018-05-29 01:29

本文选题：钢化玻璃面板 + 破裂外因　；参考：《浙江工业大学》2017年硕士论文

【摘要】：目前,市场上的燃气灶具面板多采用不锈钢和钢化玻璃两种材质,由于钢化玻璃面板具有美观大方、易清洗、耐腐蚀等优点,因而更受广大用户的青睐。然而钢化玻璃由于其材质的特殊性,自爆现象不绝于耳。究其原因,可归纳为内因和外因:内因是指玻璃成型过程中本身所存在的质量问题,包括原片玻璃中存在的Si、NiS杂质、气泡以及微裂纹等等;外因则是指燃气灶的设计不合理,具体表现为:(1)燃气灶底壳和燃烧器的设计;(2)钢化玻璃面板结构尺寸的设计。而对于不同结构尺寸的面板,破裂情况却千差万别。因此,开展玻璃面板结构尺寸对面板破裂倾向的影响研究具有很强的现实意义。本文以“玻璃面板的结构尺寸”为关注点,利用ANSYS的概率设计系统PDS以面板所受的最大应力为输出变量,以玻璃面板的长度、宽度、厚度、炉头孔开孔大小及位置为输入变量,分别从玻璃面板尺寸设计、精度加工和批量生产的角度进行了敏感性分析。主要工作及结论如下:1、利用ANSYS对玻璃面板在使用过程中的状况进行热-结构耦合,获得面板的温度、应力分布;结果表明面板达到热平衡时的最高温度为187.5℃,最大应力为71MPa,位置均在炉头孔边缘。2、通过实验,获得了面板在使用过程中各测点的应力、温度和变形数据,并与模拟进行了对比;结果表明4个温度测点不论是在趋势上还是在数值上均与模拟有很高的吻合度;4个应力测点在趋势上与模拟保持一致,数值上的相对误差均控制在20%以内;5个变形测点除某一点外均与模拟类似;从而验证了模拟的准确性。3、对于面板的尺寸设计,将各尺寸变量在各自基础上变化1/1000,发现面板的厚度、炉头孔半径、宽度和长度4个变量对最大应力有影响,敏感度依次为-0.723,-0.539,0.176,0.104;因此,在尺寸的设计过程中,应重点关注面板的厚度和炉头孔半径的设计,同时兼顾面板的长度和宽度的设计,且尽量使得炉头孔半径、面板厚度处于较大值,面板的长度和宽度处于较小值。4、对于严格控制误差上下限的精确加工,对最大应力有影响的变量为面板的厚度、炉头孔半径、宽度、炉头孔中心距面板下边缘距离、炉头孔中心距面板左边缘距离这5个参数,敏感度依次为-0.628,-0.289,0.280,0.142,0.126;所以,在加工过程中,面板的厚度加工最为重要。5、在玻璃面板批量生产的条件下,对最大应力有影响的4个变量为炉头孔半径、炉头孔中心距面板左边缘距离、炉头孔中心距面板下边缘距离、面板的宽度,敏感度依次为-0.234,0.216,-0.117,0.072;因此,在运输过程中,应该注意炉头孔半径和炉头孔中心距面板左边缘距离的保护。
[Abstract]:At present, the gas cooker panel on the market uses two kinds of stainless steel and tempered glass. Because the tempered glass panel has the advantages of beautiful, easy to clean, and corrosion resistance, it is more favored by the vast number of users. However, because of the particularity of its material, the tempered glass has the phenomenon of self explosion. The reason can be summed up as internal and external reasons. Cause: internal cause refers to the quality problems that exist in the process of glass forming, including Si, NiS impurities, bubbles and micro cracks in the original glass, and the external cause is the design of gas cooker. (1) design of gas range shell and burner; (2) design of structural size of tempered glass panel. Therefore, it is of great practical significance to study the influence of the structure size of the glass panel on the fracture tendency of the panel. This paper takes "the structure size of the glass panel" as the focus, and uses the probability design system of ANSYS to design the PDS with the maximum stress as the output variable, with the glass panel. The length, width, thickness, the size and position of the opening hole of the head hole are input variables, and the sensitivity analysis is carried out from the angle of glass panel size design, precision machining and mass production. The main work and conclusion are as follows: 1, the thermal structure coupling of the glass panel in the use process is carried out by ANSYS, and the temperature and stress of the panel are obtained. The results show that the maximum temperature of the panel reaches 187.5 degrees C and the maximum stress is 71MPa, and the position is.2 at the edge of the furnace head. Through the experiment, the stress, temperature and deformation data of each test point in the use process are obtained and compared with the simulation. The results show that the 4 temperature measurements are in the trend or in the number of the numbers. The values are in good agreement with the simulation; the 4 stress measurement points are consistent with the simulation, and the relative error of the numerical values is controlled within 20%. The 5 deformation points are similar to the simulation except some point. Thus, the accuracy of the simulation is verified by.3, and the size variables of the panel are changed on the basis of 1/1000 for the size of the panel. It is found that the thickness of the panel, the radius of the hole, the width and the length of the 4 variables have an influence on the maximum stress, and the sensitivity is -0.723, -0.539,0.176,0.104. Therefore, in the design process of the size, the thickness of the panel and the radius of the head hole should be focused on, and the design of the length and width of the panel is taken into consideration, and the hole of the furnace head is half as possible as possible. The thickness of the panel is at a large value, the length and width of the panel are in a small value.4. For the precise control of the accuracy of the upper and lower limits of the error, the variables affecting the maximum stress are the thickness of the panel, the radius and width of the head hole, the distance from the center of the head hole to the lower edge of the panel, and the distance between the center of the hole of the furnace head and the left edge of the panel. In the process of processing, the thickness of the panel is the most important.5. Under the condition of the batch production of the glass panel, the 4 variables that affect the maximum stress are the radius of the hole of the furnace head, the distance from the center of the furnace head to the left edge of the panel, the distance from the center of the head hole to the lower edge of the panel, the width of the panel. The sensitivity is -0.234,0.216 and -0.117,0.072 in sequence. Therefore, during the transportation process, we should pay attention to the protection of the distance between the hole radius of the furnace head and the distance from the center edge of the furnace head to the left edge of the panel.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ171.732;TS914.232

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