浸渍固化和切割气隙对非晶铁芯磁性能的影响

研究了生产过程中浸渍固化和切割气隙对非晶态铁芯磁性能的影响。找到了一种适合工业生产的浸渍固化工艺，对铁芯的磁性能基本上无不利影响，还对切割气隙引起的铁芯附加损耗进行了分析。     

制作高频大功率变压器用非晶或超微晶铁芯的交错对接工艺

介绍一种用铁基非晶或超微晶合金制作高频大功率变压器铁芯的新工艺。先将剪断的薄带对接为中间产品─—环形铁芯（各相邻层接口错开一定距离），然后在两相互垂直方向对铁芯加压形成具有圆角的矩形铁芯。经最佳温度退火后，将铁芯接口打开，插入线圈，再将铁芯接口接好。用此新工艺制成的矩形铁芯高频性能大大优于浸漆切割铁芯。     

线切割加工硅钢片的工艺

我们用线切割加工了各种形状的电机定、转子铁芯,从中摸索出加工薄片的工艺方法。第一种方法把裁好的硅钢片按铁芯所要求的厚度(超过50毫米的分几次切割),用3毫米厚的钢板夹紧,下面的夹板两侧比铁芯     

电机铁芯级进模定子可调式弹性收紧机构设计

介绍了定子铁芯零件的工艺要求,分析了定子铁芯叠铆成形的常规收紧工艺及新型收紧工艺,设计了可调式弹性收紧机构,对同类铁芯产品具有一定的指导意义。     

非晶C型铁芯切割面腐蚀与磁性能研究

概述了用Fe78Si9B13非晶带材制备C型铁芯的方法,通过电子显微镜、软磁交流测量仪、电感测试仪等研究了非晶C型铁芯切割面微观组织结构与损耗和电感的关系。结果表明:酸液腐蚀可恢复铁芯切口部分非晶带材片层间绝缘,进而降低铁芯损耗值,且频率越高效果越明显,电感量在此过程中上升;酸液腐蚀C型铁芯切割面是恢复片层间绝缘、降低C型铁芯损耗值的有效途径之一。     

表用步进电机铁芯冲压工艺及模具设计

介绍了几种进口生产线的铁芯冲压工艺和模具结构 ,对进口铁芯的冲压工艺和模具结构进行了分析,给出了适合国内中小企业使用的模具结构和制造工艺     

小电机定子铁芯的TIG焊接设备及工艺

本文介绍了小电机定子铁芯TIG焊接设备及工艺的国内外概况。     

高压脉冲磁开关铁芯技术要求与软磁材料适应性

本文介绍了脉冲磁开关的原理及其重要应用,脉冲磁压缩和直线感应加速器及其对软磁材料的技术要求,讨论了选材的原则及材料的适应性,对比介绍了几种软磁材料制作磁开关铁芯的优缺点和铁芯制造工艺。     

激光切割在变型车开发中的应用

叙述了采用激光切割工艺实现制件改制的工艺设计思路,通过激光切割与冲压工艺经济合理性的对比分析,确定了激光切割加工工艺在变型车开发中应用的可行性,并从生产工艺设计规划、激光切割定位工装的设计要点2个方面进行了详细介绍。     

回转叠铆技术在级进模中的应用

以步进电机定转子铁芯冲压工艺为例,介绍回转和叠铆技术在多工位级进模上的应用,并叙述了步进电机定转子铁芯级进模的排样方法、模具结构与设计要点,对电机定转子铁芯采用多工位级进模进行冲裁具有一定的借鉴作用。     

Force and specific energy in stone cutting by diamond mill

Cutting force and energy are often used as parameters for monitoring the stone cutting process. Empirical models are required to guide the selection of cutting conditions. In this paper, the effect of cutting conditions on cutting force and energy are reviewed. The effects of cutting conditions on cutting force and cutting energy are related to the shape of the idealized chip thickness. The empirical models developed in this paper can be used to predict the variation of the cutting energy. Therefore, the models can be used to guide the selection of cutting conditions. The chip generation and removal process has been quantified with the intention of assisting both the toolmaker and the stonemason in optimising the tool composition and cutting process parameters, respectively.     

A study on instantaneous cutting force coefficients in face milling

In this paper, the characteristics of instantaneous cutting force coefficients in face milling are studied. In order to estimate instantaneous cutting force coefficients in face milling, the relationships between instantaneous cutting force coefficients and measured cutting force signals are derived. A series of experiments are then conducted to study the natures of instantaneous cutting force coefficients. The relationships between instantaneous cutting force coefficients and other cutting parameters are also established. It is found that the normal force coefficient is mainly affected by chip thickness and cutting speed; the vertical force coefficient is mainly affected by chip thickness, cutting edge length and cutting speed; and that the horizontal force coefficient is not only affected by chip thickness, cutting speed and length of cut, but also the variation rate of chip thickness.     

基于拟水平正交实验法的磨料水射流切割性能研究

磨料水射流切割作为一种新型的冷切割技术,凭借较强的切割能力和良好的切割质量,越来越多的应用到工程领域中。为了探究不同切割参数对磨料水射流切割性能的影响,采用拟水平法设计实验方案,进行钢板切割实验。实验结果表明:射流的切割能力与泵压和切割转速成正相关,喷嘴直径和切割靶距存在一个最佳范围,堆积作用和淹没状态都对切割性能有不同程度的影响。     

自由切削刀具的设计原理及实例

在综述非自由切削研究成果的基础上,本文揭示了实现自由切削的条件,提出了基于单元刀具合理组合的刀具设计思想．介绍了自由切削刀具的设计原理,详细说明自由切削刀具的一个实例──双柱面自由切削刀具,给出了一些实验数据。     

等离子切割多参数智能决策与控制

等离子体切割是一种经济、高效的金属切割工艺.等离子切割工艺参数中,一些参数相互耦合,共同影响切割质量与切割效率,因此,切割参数的选择是一个关键而困难的问题.论文介绍了智能数控等离子体切割机的体系结构和主要功能模块,采用神经网络实现了等离子体切割工艺参数的优化选择,采用电压测量方式实时检测割炬头与被切割板材的距离并自动调节割炬头高度,以提高切割质量和效率.系统具有自动编程、切割仿真与切割轨迹实时跟踪显示等功能.     

混凝土锯切技术的应用与研究现状

金刚石工具在路面、桥梁、机场、房屋等建筑行业的混凝土切割中应用广泛。本文分析比较了金刚石工具切割混凝土与传统方法切割混凝土的优缺点,介绍了四种典型金刚石工具切割混凝土的方法和适用场合,以及多个应用实例。并从混凝土切割机理、金刚石磨损、节块配方和烧结工艺、切削力等方面对金刚石工具切割混凝土的研究现状进行了概述。     

气割工艺分析

对切割氧气压力、切割速度及倾角、割嘴与割件距离等对切口表面的质量的影响因素进行了分析,并提出改进质量的措施。     

前混合磨料水射流切割参数对表面粗糙度的影响

采用前混合磨料水射流对Q235碳素结构钢进行切割实验,测量样品切口表面粗糙度;研究前混合磨料水射流的切割压力、喷嘴出口直径、切割靶距、切割速度和切割深度对样品切口表面粗糙度的影响规律;结合实验数据,建立表面粗糙度二次非线性回归预测方程。研究结果表明：前混合磨料水射流的切割压力、喷嘴出口直径与表面粗糙度呈负相关关系;切割靶距、切割速度、切割深度与表面粗糙度呈正相关关系;各因素的影响权重大小依次为：喷嘴出口直径、切割深度、切割压力、切割速度、切割靶距;影响表面粗糙度的实质因素为磨料流量和磨料能量;建立的表面粗糙度二次非线性回归预测方程的平均偏差为7.99%。     

An examination of the fundamental mechanics of cutting force coefficients

In metal cutting, the cutting force is the key factor affecting the machined surface, and is also important in determining reasonable cutting parameters. The research and construction of cutting force prediction models therefore has a great practical value. The accuracy of cutting force prediction largely depends on the cutting force coefficients of the material. In the average cutting force model, cutting force coefficients are considered to be constant. This study makes use of experiments to investigate the cutting force coefficients in the average cutting force model, with a view to accurately identifying cutting force coefficients and verifying that they are related only to the tool–workpiece material couple and the tool geometrical parameters, and are not affected by milling parameters. To this end, the paper first examines the theory behind identifying cutting force coefficients in the average cutting force model. Based on this theory, a series of slot-milling experiments are performed to measure the milling forces, fixing spindle speeds and radial/axial depths of cutting, and linearly varying the feed per tooth. The tangential milling force coefficient and the radial milling force coefficient are then calculated by linearly fitting the experimental data. The obtained results show that altering the milling parameters does not change the milling force coefficients for the selected tool/workpiece material combination.     

Cutting force prediction of sculptured surface ball-end milling using Z-map

The cutting force in ball-end milling of sculptured surfaces is calculated. In sculptured surface machining, a simple method to determine the cutter contact area is necessary since cutting geometry is complicated and cutter contact area changes continuously. In this study, the cutter contact area is determined from the Z-map of the surface geometry and current cutter location. To determine cutting edge element engagement, the cutting edge elements are projected onto the cutter plane normal to the Z-axis and compared with the cutter contact area obtained from the Z-map. Cutting forces acting on the engaged cutting edge elements are calculated using an empirical method. Empirical cutting mechanism parameters are set as functions of cutting edge element position angle in order to consider the cutting action variation along the cutting edge. The relationship between undeformed chip geometry and the cutter feed inclination angle is also analyzed. The resultant cutting force is calculated by numerical integration of cutting forces acting on the engaged cutting edge elements. A series of experiments were performed to verify the proposed cutting force estimation model. It is shown that the proposed method predicts cutting force effectively for any geometry including sculptured surfaces with cusp marks and a hole.