飞锯锯切矩形钢管的切口变形及毛刺消除措施

分析了飞锯锯切矩形钢管在不同的切入点下，锯切力、钢管抗变形能力和锯屑排除等因素对切口变形和毛刺高度的影响。指出了最佳的锯切条件。通过改变飞锯汽缸和锯臂基座位置，并保证锯片切入点和切出点为矩形管的两个对角，可以使锯口变形和毛刺的高度大大降低。

线切割加工中切口变形引起误差的形式及对策

模具钢在线切割前，由锻打、淬火等工艺过程中所产生的内应力，经退火、回火等措施处理以后，也难以彻底消除。在线切割加工过程中，由于工件的内应力平衡遭到破坏，从而引起切口变形（扩张或收缩）。切口变形是引起模具切割件加工误差的重要因素，因而在线切割加工中，必...

人体背部运动功能与服装放松量研究

通过服装切口变形实验和有关的数据分析,研究了人体背部运动功能和服装放松量之间的关系,并提出了不同宽松程度的服装胸围放松量的具体数据。

圆柱线材切断模的设计

某五金机械厂大量加工线材表面质量和长度尺寸要求都较高的出口线材产品,在未设计线材切断模之前,线材长度尺寸出现较大误差、切口倾斜而且端部呈现弯曲变形的现象,产品往往需要人工进行修磨,不但增加了工人的劳动量,而且效率很低。通过对线材切断模的设计和制造,完全解决了上述问题,大大提高了工作效率。

Thermal stress distribution around a thermally-insulated polygonal cutout in graphite/epoxy composite laminates under heat flux

In this study,the effect of influencing parameters on the stress distribution around a polygonal cutout within a laminated composite under uniform heat flux was analytically examined.The analytical method was developed based on the classical laminated plate theory and two-dimensional thermo-elastic method.A mapping function was employed to extend the solution of a perforated symmetric laminate with a circular cutout to the solution of polygonal cutouts.The effect of significant parameters such as the cutout angular position,bluntness and aspect ratio,the heat flux angle and the laminate stacking sequence in symmetric composite laminate containing triangular,square and pentagonal cutouts was studied.The Neumann boundary condition was used at the edges of the thermally insulated polygonal cutout.The laminate was made of graphite/epoxy(AS/3501) material with two different stacking sequences of [30/45]sand[30/0/-30]_(s).The analytical solutions were well validated against finite element results.