基于并联机构的雕刻机应用

传统的雕刻机构件间以串联方式联接,串联机构的优点为机构的工作空间较大、机构的运动链较为简单以及控制简单等。存在机构的整体刚度较低、承载能力较小、运动惯量大、机构的运动误差积累进而造成输出末端的精度低等弊端。机构杆件间以并联式联接,其与串联机构在运动学求解、动力学研究以及控制等方面存在较大的差异,且其理论基础已经基本成熟,具有广阔的研究前景。而三维雕刻机的研制已成为发展趋势,研究并串混联式雕刻机正弥补了传统串联式雕刻机的缺点,可满足三维雕刻机性能稳定、机构简单、价格低的研制要求。     

大巧若拙大朴不雕-庄子和汉代石刻天然美的启示

艺术家要做的事是去发现天然美，再用自己的雕刻技巧以补造化之不足，使自然造化所蕴涵的形象在稍加雕凿后得以完美的显现。用这种方法做的作品，它的诞生意味着庄子的以天然美取胜和霍去病墓雕塑的重天然美稍事雕刻的思想在创作实践中成功完美的结合，这种结合使我们找到了一种全新的创作方法，而这种方法至今可以说在我国现代以陶瓷塑造人物的领域内无人探索与尝试。     

基于MasterCAM的深槽窄缝零件数控加工技术研究

分析深槽窄缝零件的结构特点,介绍应用M asterCAM X2软件对深槽窄缝零件的数控编程、仿真和加工工艺的规划,并分析了数控编程中加工策略的选择及参数的设置,解决了数控编程中选用小直径刀具的加工工艺难点,取得了良好的加工效果。     

新型五轴木工雕刻机结构设计与研究

以双回转电主轴为基础,设计新型五轴联动木工数控雕刻机,以方型空心型钢组合焊接形式建立数控雕刻机整体机架结构,采用齿轮齿条及滚珠丝杠副配合双边线性滚动导轨构建雕刻机进给系统,并对传动机构进行校核。设计的五轴木工数控雕刻机能够高速、高精度完成复杂的木工雕刻任务。     

基于运动控制卡的雕刻机数控系统的研究与开发

对基于PC+运动控制卡的数控雕刻机的系统进行了研究,简单介绍了雕刻机数控系统的硬件系统,详细描述了控制系统的软件结构,软件采用模块化设计,包括NC代码管理、加工运行、人机交互等模块,重点讲述了NC代码管理部分,最后在Windows XP平台上以Visual C++6.0为开发工具,设计出了界面友好,简单易用的雕刻机控制系统软件.     

Pro／E在复杂曲面文字雕刻加工中的应用

为了有效地提高复杂曲面文字雕刻的质量,探讨了采用Pro/E软件在FANUC 5轴数控加工中心上实现复杂曲面文字雕刻的方法。利用建模模块进行零件模型设计,并根据加工零件特点进行数控加工工艺分析;接着使用NC模块实现复杂曲面文字雕刻的自动编程,并将软件生成的G代码传输至FANUC 5轴数控加工中心来实现曲面文字雕刻的实际加工。该方法实际应用效果很好,提高了曲面文字雕刻的精度和效率。     

数控雕刻机主轴系统的试验模态分析

为了在使用数控雕刻机加工时有效提高刀具寿命和加工质量,针对精雕雕刻机主轴的动态特性,采用了试验模态分析方法,分析了雕刻机的主轴系统的固有频率和模态振型,得到了该主轴系统在设计转速内的6阶模态,为加工时工艺参数选取提供了依据。     

Interiors of 1900. Photographs by Adolf Mas

Abstract

The markings associated with the physical wear and tear of denim garments are an integral aspect of material culture, pursued as creative concepts through deconstructed fashion approaches. For some designers a textile's heritage and the effects of time are as important as reworking silhouettes from history. While fashion is inherently forward thinking, it is the patina of age that comes from “wearing” a garment that can be integral to the designer's artistic vision. Denim garments possess unique possibilities for articulating the human form in ways that transcend the vagaries of the latest cut, through evidencing (or simulating) practices of wearing and concepts of longevity. This paper explores denim's capacity to act as a canvas for the body through analysis of a series of conceptual and commercial approaches drawn from contemporary fashion and textile designers, who have reinforced denim's origins or reinterpreted it through creative experimentation. The study is underpinned by the author's empirical research, which seeks to reveal both the recognizable and more abstract visual qualities embodied within denim as a fashion construct. Denim is evaluated as a surface for conveying complex visual signifiers relating to temporality, demonstrated through the cloth's unique facility to embody narrative and illusion.     

Dream a Little Dream

Does the protocell require too great a leap in scalar imagination for architects? A detail of a building is manageable but what about something smaller than the microscopic? Mark Morris encourages designers to scale down to the diminutive level of the nanoscale by providing them with some inspiring precedents in architectural theory and popular culture. Copyright © 2011 John Wiley & Sons, Ltd.     

起始条件形成反常膛压的初步研究

建立了计及挤进过程、阻力特征和阻燃装药的弹道解法，利用经典内弹道模型对火药的破碎、起动阻力变化等因素对膛内压力的反常影响进行了初步研究。