立体裁剪技术在服装设计中的应用

阐述了立体裁剪技术在服装设计中的重要作用,总结了立体裁剪技术要求,简述了立体裁剪的优势在服装设计三要素中的体现,指出了服装设计中应用立体裁剪所能解决的关键问题。     

试论"状--动--宾"结构的层次分析

判断“状-动-宾”结构是不是多切分结构,应该从结构,功能,意义三方面来衡量。对多切分的“状-动-宾”结构进行层次分析时,应该根据“状”,“动”,“宾”这三者之间的语义疏密关系来确定。     

砂土地震液化的不确定性判别法综述

通过对不同自由场地液化势估计的方法和公式进行总结和比较 ,发现剪切波速比其它波的波速更能反映地基岩土层的工作性能 ,现已为全国地基勘察规范所采用     

变频器在切削力测量实验中的应用

切削力是金属切削中的重要参数之一,与切削速度呈驼峰曲线关系。为了使车削中的切削速度不受工件直径变化的影响而得到清晰完整的驼峰曲线,采用变频器对机床主电机进行无级调速,从而使主轴转速由主电机工作频率和调速手柄共同决定。实验结果表明无级调速可得到较理想的驼峰曲线。     

Development of integrated precision vibration-assisted micro-engraving system

A novel precision vibration-assisted micro-engraving system was developed by the integration of fast tool servo and ultrasonic elliptical vibration system, in which the flexure hinge was designed to avoid backlash and PID control algorithm was established to guarantee specific precision. Apart from experimental validation of the performance of the system, various micro-V-grooves cutting experiments on aluminum alloy, ferrous material and hard cutting material were performed, in which Kistler force sensor was used to measure cutting force. Through experiments, it was clear that the vibration-assisted micro-engraving system can ensure good quality of micro-V-grooves and reduce cutting force by about 60% compared with traditional removal process without ultrasonic vibration.     

Scratching and Turning Experiments on Machinability of Optical Glass SF6 in Diamond Cutting Process

To improve the machinability of optical glass and achieve optical parts with satisfied surface quality and dimensional accuracy, scratching experiments with increasing cutting depth were conducted on glass SF6 to evaluate the influence of cutting fluid properties on the machinability of glass. The sodium carbonate solution of 10.5% concentration was chosen as cutting fluid. Then the critical depths in scratching experiments with and without cutting fluid were examined. Based on this, turning experiments were carried out, and the surface quality of SF6 was assessed. Compared with the process of dry cutting, the main indexes of surface roughness decrease by over 70% totally. Experimental results indicated that the machinability of glass SF6 can be improved by using the sodium carbonate solution as cutting fluid.     

薄壁结构件的加工工艺

文章介绍了传统的薄壁结构件的加工方法及其缺陷,讨论了影响薄壁结构件加工精度的因素,提出了用高速切削加工典型薄壁结构件的方法,总结出当前机械制造业发展的方向是：努力发展数控切削技术,并向更高层次的自动化、柔性化、敏捷化、网络化和数字化制造方向推进。     

新绛木版年画的画面特征

新绛木版年画以其独特的艺术魅力成为晋南地区民间艺术的奇葩,其兴盛与古绛州悠久的历史、重要的地理位置、丰富的物产和大量的民间画匠有密切关系。新绛木版年画题材丰富,其中以戏曲年画独树一帜,体现出浪漫主义情怀。新绛木版年画构图饱满,线条与色彩极具装饰性,并富于实用性,具有重要的文化艺术价值,影响深远。     

论数控机床加工的刀具补偿

数控加工具有加工精度高、效率高、质量稳定等特点,而合理掌握刀具补偿方法,灵活应用刀具半径补偿功能,合理设置刀具半径补偿值,是保证其精度高、质量稳定的重要因素.因此,编程操作人员必须熟练掌握数控机床加工中的各种刀具补偿的原理和方法.