双联式辊模拉制圆形钛丝的成形性研究

利用实验机等研究了整体模与辊模拉制圆形钛丝的变形特点 ,给出了变形参数、力参数等实验参术。结果表明 。

二连式辊模拉拔圆钢丝的研究

探讨辊模拉拔与整体模拉拢及冷轧的差异，分析用棍模拉拔圆钢丝的力学特征和变形特点，介绍实验装置及实验结果．

辊模拔丝力能参数的计算

用初等解析方法，根据力能平衡条件，求解出二连式辊模拉拔力和正压力实用计算公式，计算结果与实验测定基本吻合。给出了影响拉拔力和正压力基本因素和辊模拉拔节能降耗的原因。

新型结构异型管材成形模具

介绍了一种新型结构异型管材成形模具──组合式短应力线预应力辊式模的原理和结构特点。

基于有限元的秸秆压块环模成型温度场分布

目前环模压块成型机的环模块温度差过高,成型后受热不均。结合压块成型工作条件,利用ANSYS中的Thermal模块,模拟环模中压块成型温度场,分析环模压块在不同时刻的温度场分布,并对成型装置进行优化设计。结果表明,优化后整体温度趋于平衡,温差明显减小,在加热20 min后,环模块的温度差降为19.25℃。优化后环模块成型过程的温度场沿轴向呈先增大,再波动状平稳,最后逐渐减小的趋势,环模块大部分区域的温度变化趋于缓和,环模块成型温度更均匀。

拉拔新技术

本文介绍了反张力拉拔、辊式模拉拔、强制润滑拉拔、无酸拉拔、超塑性拉拔等新技术，这些是国内外正在研究或已实际应用的新工艺，对解决拉拔工艺的高能耗问题有较高的理论与实用价值。此外还介绍了高生产率的新型拉拔设备。

Fuzzy TOPSIS method to primary crusher selection for Golegohar Iron Mine(Iran)

Selection of the crusher required a great deal of design regarding to the mine planning. Selection of suitable primary crusher from all of available primary crushers is a multi-criterion decision making(MCDM) problem. The present work explores the use of technique for order performance by similarity to ideal solution(TOPSIS) with fuzzy set theory to select best primary crusher for Golegohar Iron Mine in Iran. Gyratory, double toggle jaw, single toggle jaw, high speed roll crusher, low speed sizer, impact crusher, hammer mill and feeder breaker crushers have been considered as alternatives. Also, the capacity, feed size, product size, rock compressive strength, abrasion index and application of primary crusher for mobile plants were considered as criteria for solution of this MCDM problem. To determine the order of the alternatives, closeness coefficient is defined by calculating the distances to the fuzzy positive ideal solution(FPIS) and fuzzy negative ideal solution(FNIS). Results of our work based on fuzzy TOPSIS method show that the gyratory is the best primary crusher for the studied mine.

Mathematical modeling on multi-stage series crushing ratio distribu- tion based on fuzzy physical programming

Double-layer, multi-roller plate crusher is a new device, that uses a multi-stage series crushing style to break particles, with the crushing ratio distribution directly influencing the machine＇s performance. Three crushing ratios of 2.25, 2.15 and 2.01, used for fuzzy physical programming, were determined. The comparison of the optimized result between the double-layer multi-roller plate crusher and a high pressure roll grinder showed that the double-layer multi-roller plate crusher had a better performance, reducing crushing force and wear.

柔版印刷1000问6

151整体压切式圆压圆模切辊是怎样加工制成的?普通的整体压切式圆压圆模切辊的加工工艺是:根据承印材料的技术参数与加工图案的要求,选择不同等级的刀具钢,经过高精度的数控切削将其表面加工成刀刃的形状,再进行热处理使材料表面硬化,最后在显微镜下精修刀刃,再上机试模切。