在连接器产品设计中,需要对形状复杂的不锈钢玻璃封接组件进行表面处理,使零件表面达到镜面光亮效果,才能在后续电镀过程中更好地保证产品的性能。根据实际生产过程中的需求,研究了不锈钢玻璃封接组件电镀前表面处理达到镜面光亮效果的...在连接器产品设计中,需要对形状复杂的不锈钢玻璃封接组件进行表面处理,使零件表面达到镜面光亮效果,才能在后续电镀过程中更好地保证产品的性能。根据实际生产过程中的需求,研究了不锈钢玻璃封接组件电镀前表面处理达到镜面光亮效果的工艺过程,探索出一种新型环保不锈钢化学处理液,讨论了溶液各组分和温度、处理时间等工艺参数的影响。通过实验和生产验证,该不锈钢玻璃封接组件镜面化学处理液的最佳工艺条件为：40 m L/L硫酸,80 g/L添加剂XSY,θ为80℃,t为30~50 s,其表面可达到镜面般光亮,且封接玻璃表面无裂纹,保障其表面在电镀过程中具有良好的镀层结合力和表面质量,满足了设计对产品的性能要求。展开更多
药房和医院一样都有着十分的特殊性,一方面它让饱受病痛的人们产生依赖感,另一方面又让人们对其产生敬畏感。它总是处于一个稍显冰冷的状态,人们轻易不愿闲逛,同时也缺乏舒适感。本土设计师Jean de Lessard承担了蒙特利尔郊区Uniprix药...药房和医院一样都有着十分的特殊性,一方面它让饱受病痛的人们产生依赖感,另一方面又让人们对其产生敬畏感。它总是处于一个稍显冰冷的状态,人们轻易不愿闲逛,同时也缺乏舒适感。本土设计师Jean de Lessard承担了蒙特利尔郊区Uniprix药店及配套小型诊所的室内设计任务。这是一次挑战,要怎样打破人们对药店既定的认识,为它创造一个新的空间形象是他在设计中试图去尝试的命题。展开更多
The full-range behavior of partially bonded, together with partially prestressed concrete beams containing fiber reinforced polymer （FRP） tendons and stainless steel reinforcing bars was simulated using a simplified...The full-range behavior of partially bonded, together with partially prestressed concrete beams containing fiber reinforced polymer （FRP） tendons and stainless steel reinforcing bars was simulated using a simplified theoretical model. The model assumes that a section in the beam has a trilinear moment--curvature relationship characterized by three particular points, initial cracking of concrete, yielding of non-prestressed steel, and crushing of concrete or rupturing of prestressing tendons. Predictions from the model were compared with the limited available test data, and a reasonable agreement was obtained. A detailed parametric study of the behavior of the prestressed concrete beams with hybrid FRP and stainless steel reinforcements was conducted. It can be concluded that the deformability of the beam can be enhanced by increasing the ultimate compressive strain of concrete, unhonded length of tendon, percentage of compressive reinforcement and partial prestress ratio, and decreasing the effective prestress in tendons, and increasing in ultimate compressive strain of concrete is the most efficient one. The deformability of the beam is almost directly proportional to the concrete ultimate strain provided the failure mode is concrete crushing, even though the concrete ultimate strain has less influence on the load-carrying capacity.展开更多
In recent years, high precision geometric shape, surface roughness, and cost reduction are required for large glass component molding processes. In this research, the polishing process of stainless steel molding dies ...In recent years, high precision geometric shape, surface roughness, and cost reduction are required for large glass component molding processes. In this research, the polishing process of stainless steel molding dies used to form thin glass components is investigated. The surface roughness of the polished stainless steel molding die surface is below Rz = 200 nm （P-V） at 15 h polishing with 0.5 % alumina polishing liquid. In the case of polishing process with only the weight of molding die and a polishing pressure of 0.5 kPa, polishing times are approximately 60 h and 20 h, respectively. Final surface roughness polished stainless steel molding die surface with pressure of 0.5 kPa is Rz = 7 nm （P-V）, rms -- 1.6 nm and Ra = 1.4 nm. In a thin glass component manufacturing method, ＂slumping method＂, surface roughness before glass forming is rms = 0.7 nm and Ra = 0.6 nm, and after is rms = 0.7 nm and Ra = 0.6 nm. Therefore, there were no observable changes their surface roughness.展开更多
文摘在连接器产品设计中,需要对形状复杂的不锈钢玻璃封接组件进行表面处理,使零件表面达到镜面光亮效果,才能在后续电镀过程中更好地保证产品的性能。根据实际生产过程中的需求,研究了不锈钢玻璃封接组件电镀前表面处理达到镜面光亮效果的工艺过程,探索出一种新型环保不锈钢化学处理液,讨论了溶液各组分和温度、处理时间等工艺参数的影响。通过实验和生产验证,该不锈钢玻璃封接组件镜面化学处理液的最佳工艺条件为：40 m L/L硫酸,80 g/L添加剂XSY,θ为80℃,t为30~50 s,其表面可达到镜面般光亮,且封接玻璃表面无裂纹,保障其表面在电镀过程中具有良好的镀层结合力和表面质量,满足了设计对产品的性能要求。
文摘药房和医院一样都有着十分的特殊性,一方面它让饱受病痛的人们产生依赖感,另一方面又让人们对其产生敬畏感。它总是处于一个稍显冰冷的状态,人们轻易不愿闲逛,同时也缺乏舒适感。本土设计师Jean de Lessard承担了蒙特利尔郊区Uniprix药店及配套小型诊所的室内设计任务。这是一次挑战,要怎样打破人们对药店既定的认识,为它创造一个新的空间形象是他在设计中试图去尝试的命题。
基金Project (50478502) supported by the National Natural Science Foundation of China
文摘The full-range behavior of partially bonded, together with partially prestressed concrete beams containing fiber reinforced polymer （FRP） tendons and stainless steel reinforcing bars was simulated using a simplified theoretical model. The model assumes that a section in the beam has a trilinear moment--curvature relationship characterized by three particular points, initial cracking of concrete, yielding of non-prestressed steel, and crushing of concrete or rupturing of prestressing tendons. Predictions from the model were compared with the limited available test data, and a reasonable agreement was obtained. A detailed parametric study of the behavior of the prestressed concrete beams with hybrid FRP and stainless steel reinforcements was conducted. It can be concluded that the deformability of the beam can be enhanced by increasing the ultimate compressive strain of concrete, unhonded length of tendon, percentage of compressive reinforcement and partial prestress ratio, and decreasing the effective prestress in tendons, and increasing in ultimate compressive strain of concrete is the most efficient one. The deformability of the beam is almost directly proportional to the concrete ultimate strain provided the failure mode is concrete crushing, even though the concrete ultimate strain has less influence on the load-carrying capacity.
文摘In recent years, high precision geometric shape, surface roughness, and cost reduction are required for large glass component molding processes. In this research, the polishing process of stainless steel molding dies used to form thin glass components is investigated. The surface roughness of the polished stainless steel molding die surface is below Rz = 200 nm （P-V） at 15 h polishing with 0.5 % alumina polishing liquid. In the case of polishing process with only the weight of molding die and a polishing pressure of 0.5 kPa, polishing times are approximately 60 h and 20 h, respectively. Final surface roughness polished stainless steel molding die surface with pressure of 0.5 kPa is Rz = 7 nm （P-V）, rms -- 1.6 nm and Ra = 1.4 nm. In a thin glass component manufacturing method, ＂slumping method＂, surface roughness before glass forming is rms = 0.7 nm and Ra = 0.6 nm, and after is rms = 0.7 nm and Ra = 0.6 nm. Therefore, there were no observable changes their surface roughness.
